Class / Patent application number | Description | Number of patent applications / Date published |
408229000 | With axially extending relief channel | 77 |
20080304928 | Tool for chip removing machining as well as a basic body and an indexable cutting insert therefor - A tool for chip removing machining, including a basic body having a connecting surface included in an insert seat, and an indexable cutting insert mounted in the basic body and having a connecting surface in mechanical engagement with the connecting surface of the basic body, and fixed by a tightening element. The connecting surface of the basic body includes a solitary, polygonal elevation that protrudes from a bottom surrounding the elevation from all sides. The elevation includes two external side support surfaces orientated at an angle to each other. The connecting surface of the cutting insert includes a solitary depression that is wider and deeper than the elevation. The depression is surrounded by a frame in which there are included at least three banks running at an angle to each other and including internal shoulder surfaces, two of which are pressed against the two side support surfaces of the elevation, and lower base surfaces, which are situated in a common plane, three of which rest against the bottom. In addition, the invention relates to a basic body and a cutting insert as such. | 12-11-2008 |
20100104387 | SPADE BIT - The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal. | 04-29-2010 |
20100322732 | Drilling Tool - The invention discloses a drilling toll having at least one chip groove for chip removal, having an insert seat which is formed at the end of the chip groove and serves as a holder for an indexable insert with at least one main cutting edge on the two narrow sides and with at least one secondary cutting edge on the two longitudinal sides of one face side wherein the indexable insert has two face sides facing away from one another and bears with its inactive face side on a holding surface of the insert seat, and a partial region of the inactive secondary cutting edge of its active face side lies in the insert seat at a distance from the adjoining side wall of the insert seat created by a slot, and wherein a guide lip which covers the slot protrudes out of the top side of the side wall in the direction of the inactive secondary cutting edge. | 12-23-2010 |
20110085868 | Twist Drill - A twist drill includes a cutting portion and a drill body. The cutting portion has a chisel edge, a segment relief surface, a chamfer relief surface and at least two flutes extending longitudinally to the drill body. Each flute has a rake surface and a gash extending away from the chisel edge. The cutting portion further has at least two cutting segments, each cutting segment having a first curved cutting edge, a second curved cutting edge and a chamfer cutting edge. | 04-14-2011 |
20110103910 | DRILL BIT - A drill bit, has
| 05-05-2011 |
20110150589 | Drill - Drill with a straight chucking groove, with a convexly curved main cutting edge with, adjacent to the main cutting edge, a convexly designed region of groove base and with, adjacent to the convexly designed region of the groove base, a concavely designed groove base or a concavely curved main cutting edge with, adjacent to the main cutting edge, a concavely designed groove base with, adjacent to the concavely design region of the groove base, a convexly design region of the groove base. | 06-23-2011 |
20110229281 | Cutting Tool for Drilling - A cutting tool for drilling has cutting inserts in the same shape and is capable of discharging a chip in a chip flute. The cutting tool includes: a body having a lower end facing a direction of drilling, a central axis of rotation and at least two chip flutes; and indexable inner and outer cutting inserts each disposed in an insert pocket formed at the lower end of the body and at a forward end of a corresponding chip flute. The inner cutting insert is located closer to the central axis of the body than the outer cutting insert. The inner and outer cutting inserts have the same shape and include lower cutting edges for depth cutting during drilling. The lower cutting edge of the inner cutting insert is disposed lower than the lower cutting edge of an imaginary cutting insert at a position where the inner cutting insert is overlapped with the imaginary cutting insert where the outer cutting insert is rotated by approximately a half-turn relative to the central axis. | 09-22-2011 |
20120063860 | Drilling Tool - Chips are segmented to have a desired width and the chip controllability is improved and the tool rigidity is improved. A drilling tool is provided that includes: a tool body; a chip discharge groove formed at the outer periphery of the tool body; at least one sub-groove formed at an inner face facing the front side in the tool rotation direction T of the chip discharge groove; a rake face; a tip end flank face; and a cutting edge formed at a ridge line at which the tip end flank face intersects with the rake face. The plurality of rake faces form a step-like shape having at least one step section. The drilling tool is configured so that the turnup section of the sub-groove is turned up in a different direction from the direction along which the turnup section of the chip discharge groove is turned up. | 03-15-2012 |
20120121352 | MULTI-FLUTE REAMER AND CUTTING INSERT THEREFOR - A multi-flute reamer includes a cutting portion having a forward end and a rearward end, and a chip flute with a chip gash opening, and a cutting insert mounted on the cutting portion. A leading edge is formed at an intersection between a top surface and a radially-outward side surface, and a front edge is formed at an intersection between the top surface and a forward side surface. The cutting insert includes a rounded lead cutting edge formed at the intersection between the leading edge and the front edge, and the top surface includes a chip breaker having a bottom surface formed with a radius, R. | 05-17-2012 |
20120163934 | DRILLING TOOL - A drilling tool includes a tool shank disposed about a center longitudinal axis. The tool shank having a holding region structured to be chucked in the chuck of a machine tool and an active region extending from the holding region. The drilling tool further includes at least two partial cutting edges formed on an end face of the active region and running at right angles to the center longitudinal axis and form a drill main cutting edge and a clearance formed in the end face between the partial cutting edges. The clearance being recessed axially along the center longitudinal axis toward the tool shank. | 06-28-2012 |
20130028677 | DRILL BIT AND METHOD FOR MANUFACTURING - A method for manufacturing a drill bit ( | 01-31-2013 |
20130142583 | Drill - [Problem] To provide a drill which enables a great reduction in cutting resistance and easy performance of a drilling operation by human power using a hand drill, a drilling machine, or the like. | 06-06-2013 |
20130266389 | Cutting Tool and Cutting Head With a Resilient Coupling Portion - A cutting head having a cutting end and an opposite coupling end along a longitudinal cutting head axis; having a cutting head length; and including two major surfaces and a peripheral surface. A male coupling portion extends rearwards from the coupling end, between a base portion and a rear surface, with a circumferential peripheral surface, having a coupling length. A flexibility slot extends from the rear surface opening to the major surfaces, along the cutting head axis, having a slot length and a head slot length. The coupling length is equal to or less than half the head slot length, and the slot length is equal to or greater than half the cutting head length. The cutting head is self-clamped into a tool shank with female coupling portion, by a friction fit between the male and female portion peripheral surfaces, causing the cutting head to elastically deform. | 10-10-2013 |
20130330142 | SELF-CLAMPING CUTTING HEAD FOR RELEASABLY MOUNTING ON A CUTTING TOOL - A cutting tool has a tool shank and a replaceable cutting head resiliently secured to the tool shank by an interference fit between a male fixation member of the cutting head and a female fixation member of the tool shank. The male fixation member has a resilience slit. In each cross section of the cutting tool taken perpendicular to an axis of rotation of the cutting tool through mutual abutment regions, the cross sectional profiles of the mutual abutment regions are arcuate sectors. | 12-12-2013 |
20130330143 | ADJUSTABLE INDEXABLE DRILL AND MODULAR SYSTEM AND HOLDER - An adjustable drill has a drill body having a face surface with a directional feature provided therewith. At least one cartridge is mounted adjacent the face surface and selectively slidable along the directional feature to provide adjustment. At least one insert is releasably affixed in an insert pocket provided in the cartridge. In further examples, the adjustable drill may have a central cutting system in combination with the adjustable cartridge type system, wherein the central cutting system may be modular. There may also be provided a modular type of holder arrangement to provide flexibility to adapt the system for various applications. | 12-12-2013 |
20140023448 | DRILL - A drill comprises a drill body that is rotatable on an axis. Chip evacuating flutes, which are open on front flanks of the drill body and are extended rearwards, are formed in a periphery of the drill body on its front side. Cutting edges are formed along ridge lines where the front flanks intersect with wall surfaces of the chip evacuating flutes facing a drill rotating direction. At least first and second front flanks are formed on the front flanks in order of their locations in the drill rotating direction from its leading side to its trailing side. A clearance angle of the second front flank is greater than that of the first front flank. Intersection lines of the first and second front flanks cross the cutting edges. | 01-23-2014 |
20140219737 | DRILL - A drill includes: a chip discharge flute opened in a tip surface; and a cutting edge formed at an intersecting portion between an inner wall surface of the chip discharge flute on a side of a drill rotation direction and a tip flank formed on the tip surface, the cutting edge being made up of a concavely-curved cutting edge portion formed on an inner circumferential side and a convexly-curved cutting edge portion formed on an outer circumferential side, a cross section orthogonal to an axial center having a first convex curve corresponding to the convexly-curved cutting edge portion and a first concave curve corresponding to the concavely-curved cutting edge portion intersecting with each other. | 08-07-2014 |
20140294529 | DRILL - A drill including: a chip discharge flute; and a cutting edge, the cutting edge being made up of a concavely-curved cutting edge portion formed on an inner circumferential side and a convexly-curved cutting edge portion formed on an outer circumferential side, the drill further including a cross section orthogonal to an axial center having a first convex curve corresponding to the convexly-curved cutting edge portion and a first concave curve corresponding to the concavely-curved cutting edge portion intersecting with each other, a flank following the cutting edge on the tip surface having an orthogonal clearance angle β formed within an angular range of 9 to 20 degrees, and a ridgeline of the cutting edge having a chamfer formed with a width CW within a range of 0.002D to 0.02D (where D is a drill diameter). | 10-02-2014 |
20140301798 | CUTTING TOOL AND METHOD OF MANUFACTURING THE SAME - A cutting tool according to an embodiment of the invention includes: a column-like shaped body having a cutting edge located at a front end part thereof and a flute which is located at an outer peripheral part thereof and is continuous with the cutting edge; a front taper connected to a rear end part of the body and having a larger diameter as separating from the body; a column-like shaped step connected to a rear end part of the front taper and having a larger diameter than the body; a rear taper connected to a rear end part of the step and having a larger diameter as separating from the step; a column-like shaped shank connected to a rear end part of the rear taper and having a larger diameter than the step; and a front connection member located in a region including the front taper and the step. | 10-09-2014 |
20150093207 | Deep hole drill tool - The present disclosure relates to a deep hole drill tool of the type that includes a basic body, a cutting insert having a cutting edge, which is formed between a chip surface and a clearance surface. The chip surface includes a chamfer surface adjacent to the cutting edge and the clearance surface, the chamfer surface having a width of at least 0.2 mm defined between two boundary lines, and which, in each infinitesimal part along the cutting edge, forms an angle (γ) of at least 25° and at most 50° with a reference plane extending perpendicular to the center or rotation axis of the tool. | 04-02-2015 |
20190143418 | Rotary Cutter for Cutting Damaged Threads of a Bolt | 05-16-2019 |
408230000 | Spiral channel | 56 |
20080199268 | DRILLING TOOL - A drilling tool. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner. | 08-21-2008 |
20080267726 | Drill - A drill can achieve extended tool life while ensuring high machining efficiency. A flute length of the drill is set to be within a range of 6D or more and 10D or less relative to an outer diameter D of the cutting edge. At least the cutting edge has its surface coated with a hard compound and the film thickness dimension of the hard compound is set to 1.0 μm or less, and the number of cutting edges is set to two. As a result, chip dischargeability and rigidity of the drill can be synergistically improved. Therefore, the life of the drill can be synergistically improved. | 10-30-2008 |
20080298918 | Drill body for chip removing machining - A drill body for chip removing machining, including an envelope surface which is concentric with a center axis around which the drill body is rotatable, and transforms into a front end surface, and a front cutting edge adjacent to a chip flute which is countersunk in the envelope surface in the area in front of the cutting edge as viewed in the direction of rotation of the drill body and runs out into the front end surface. In the front part of the chip flute, a depression is formed, which includes two part surfaces extending at an obtuse angle (a) to each other, one of which forms a bottom surface in the depression, and the other of which faces the cutting edge and is in front of the cutting edge as viewed in the direction of rotation to form a stop face for a chip removed by the cutting edge. | 12-04-2008 |
20090010728 | Axial Asymmetric Edge Drill - The present invention provides a drill for making a dilled hole having a high circularity. The axial asymmetric edge drill has a chisel portion formed in the tip center so that the chisel portion center matches with the drill shaft center. At least one of the cutting edges is in an axial asymmetric position with another cutting edge across the drill shaft center. The outline of the edges of the drill forms a circular arc. | 01-08-2009 |
20090022561 | ROTARY CUTTING TOOL - A rotary cutting tool especially adapted for cutting composite materials. The geometry of the cutting tool provides cutting forces that are controlled and directed to the inside of the hole being drilled. The cutting tool of one embodiment of the present invention preferably has a through hole or bore extending axially through the cutting tool. The through hole is preferably operatively connectable to a fluid source such as a vacuum or coolant source. | 01-22-2009 |
20090047085 | Multiple spur multiple spiral groove twist drill - A MULTIPLE SPUR MULTIPLE SPIRAL GROOVE TWIST DRILL includes a flute, whose shank is clamped and secured to a tooling holder of a drilling machine and contains multiple spiral flute grooves; each flute groove is disposed on its peripheral a flute land, a cutting section is formed on a front tip of the flute land; a spur formed at where the cutting section and the flute land crossing each other; and a lead screw point with tapered thread being disposed at a center on the front of the flute to increase strength of the cutting section; and the flute groove in conjunction with the flute to fortify the overall structural strength to provide longer service life and cost benefits of the drill. | 02-19-2009 |
20090060670 | Drill - A drill is capable of forcibly aspirating and discharging chips to prevent environmental contamination as well as to simplify cleaning the chips. The drill has an intake hole and an opening formed therein so that the aspiration takes place through the intake hole and the chips generated in the cutting process can forcibly be aspirated up from the opening. Because the chips can be discharged without the use of the cutting fluid, the drill is useful for preventing environmental contamination. Moreover, as the chips are forcibly aspirated up from the opening and discharged through the intake hole, the chips are not scattered around a workpiece to be done and cleaning the chips can become simple and easy. | 03-05-2009 |
20090067943 | Drill point for one-shot drilling of sandwich panels and similar - A drill point ( | 03-12-2009 |
20090074527 | Drilling Tool - A cutting blade | 03-19-2009 |
20090087275 | TWIST DRILL - A metal-working twist drill is provided with inner cutting edges that form a point ( | 04-02-2009 |
20090103994 | Drill Bit - An object of the present invention is to provide a drill bit whose drilling performance does not deteriorate and whose radially outer end of a blade tip is never chipped. A drill bit A comprises: a plurality of cutting blades | 04-23-2009 |
20090148250 | Drill Bit - A drill bit comprising a body including at least four flutes being formed on and extending along a longitudinal axis of the body and a web portion disposed between the at least four flutes. The flutes define a pitch length that is substantially the same as one another and the web portion has at least one web thickness. The ratio of the web thickness to the pitch length is within a range of about 14 to 25 percent. | 06-11-2009 |
20090191016 | Drill - A drill is designed to ensure wear resistance to achieve extended tool life. In the drill, at least the surface of the cutting edge is coated with a hard compound, and the film thickness dimension of the hard compound is set to be within the range of 0.1 μm or more and 1.0 μm or less. Further, the thickness dimension of the web thickness formed by the web of the groove portion is set to be within the range of 0.15 D or more and 0.25 D or less relative to the outer diameter D of the cutting edge. Consequently, chip dischargeability can be synergistically improved. As a result, there is an effect in that it is possible to prevent chip welding to thereby synergistically improve the life of the drill. | 07-30-2009 |
20090196701 | TOOL FOR CHIP REMOVING MACHINING, AS WELL AS A BASIC BODY AND A CUTTING INSERT THEREFOR - A tool for chip removing machining, including a basic body, in which at least one seating is included, which is delimited by a base surface and a rear support protruding in relation to the base surface, the base surface including a first coupling section in the form of one or more ridges and grooves, and a replaceable cutting insert having an upperside, an underside and a clearance surface extending between the upperside and the underside and transforming into the upperside via at least one cutting edge, the underside including a second coupling section having one or more grooves and ridges which engage the grooves of the first coupling section, and vice versa, at the same time as a part of the clearance surface is urged against the rear support. An imaginary extension of the ridges of the first coupling section extends by the side of the rear support. | 08-06-2009 |
20090274528 | Drill - A drill achieves a long tool life while improving a property for discharging chips. The drill includes: a columnar body which is rotated about an axis; a plurality of cutting edges each being formed at a tip end portion of the body; and a plurality of thinning edges each being formed in conjunction with the cutting edge nearer the axis by providing thinnings at the tip end portion of the body. At least one of the plurality of thinning edges is provided with a concave portion that is formed by cutting the thinning edge to be recessed in a semicircular shape toward the rear side in the rotational direction, and a center of the semicircular-shaped concave portion is provided on a line extended from the tip end portion of the thinning edge when viewed from a tip end direction of the body. | 11-05-2009 |
20090317202 | STRONG HIGH PERFORMANCE TWIST DRILL - A strong high performance twist drill which aims at providing a high performance twist drill to solve the existing problems effectively. The twist drill can reduce the change in value of the rake angle, increase the value of the rake angle especially at the position approaching the drill core, and improve the cutting condition. The twist drill comprises a shank and a working part. Said working part comprises a cutting part and a guiding part. Said cutting part includes a rake face, a relief face, a main cutting edge and a chisel edge; said guiding part includes rear groove edges and flutes; wherein, said main cutting edge tilts towards the drill core from outside to inside; the angle between the main cutting edge and the center vertical line at the cross section is in the range of 3-25°; said main cutting edge intersects with back groove face at the narrow chisel edge; the length of the narrow chisel edge is in the range of 0.03-0.5 mm; and the rake angle at the drill core is positive. | 12-24-2009 |
20090317203 | SPIRAL FLUTED TAP - As shown in FIG. | 12-24-2009 |
20100008740 | ROTARY CUTTER - Embodiments provide a helical cutting tool and a helical cutting bit that may be utilized to cut various materials. The helical cutting bit and cutting tool include a variety of features to increase the efficiency of the cutting tool during cutting operations. | 01-14-2010 |
20100028098 | Drill bit configuration - This invention has to do with a rotary twist drill of the type having a fluted cylindrical shank with a drill bit end having at least two cutting edges extending radially outwardly from the longitudinal axis of the drill. Cutting edges are formed by the intersection of the flutes with the drill point end and extend radially outwardly from the center of the drill body to the outer perimeter of the drill body. Gashes formed on the drill point end form innermost cutting edge portions which are symmetrical with one another about a point offset both horizontally and vertically from the axial centerline of the drill body so as to allow a positive cutting action at the centerline of the material to be removed. | 02-04-2010 |
20100054884 | Drill - A drill in which a flute is formed from a point to a base end side of a body of the drill, on a side face to be rotated about an axis, a cutting edge is formed between a wall surface of the flute which faces a drill rotational direction side and a flank at the point of the body, and a thinned portion is provided to a web portion of the point. The cutting edge is formed in a convex arc shape with a curvature radius 0.25 to 1 times a drill diameter; a radial rake angle at an outer peripheral portion of the cutting edge is −60 to −15 degrees; a corner portion, closer to the center of the point, of the thinned portion is formed in an arc shape with a curvature radius of at least 0.1 mm and not greater than 0.05 times the drill diameter; and the drill includes three flutes and three cutting edges. | 03-04-2010 |
20100092259 | DRILL BIT FOR DRILLING HAVING AT LEAST TWO CUTTING EDGES, EACH WITH TWO CUTTING PORTIONS AND A NON-CUTTING PORTION BETWEEN THE TWO CUTTING PORTIONS - A drill bit for drilling having at least two cutting edges, each with two cutting portions and a non-cutting portion between the two cutting portions. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner. | 04-15-2010 |
20100135741 | Drill Bit Including One Piece Cutting Head - A cutting head for a drill bit has a body with an overall cruciform shape. One pair of opposing arms defines a main cutting edge. The other pair of opposing arms defines an auxiliary edge. The main cutting edge is defined by rake surfaces and relief surfaces. Each rake surface and relief surface is defined by a plurality of facets. The main cutting edge includes a chisel edge. A first pair of planar rake facets, one on each end of said chisel edge, and a first pair of planar relief facets, adjacent said chisel edge, defines a portion of the cutting edge. A remaining portion of the main cutting edge is defined at the apex of a plurality of curved rake facets and curved relief facets. The auxiliary edge is defined by a plurality of curved surfaces. | 06-03-2010 |
20100158626 | Drill and drilling method for workpiece - A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0° | 06-24-2010 |
20100158627 | DRILL BIT FOR DRILLING HOLES IN CARBORESIN LAMINATES - A drill bit having features rendering it particularly effective in cutting holes in carboresin laminates of the type used in the aircraft industry. A pair of diametrically opposite lands slope radially inward at the working end of the bit to a pair of cutting edges disposed at an obtuse angle to one another and forming an efficient cutting tip. Notches with sloping ramps adjacent the cutting edges efficiently convey cut material to adjacent flutes. The lands curve radially inward between their full diameter portion and their cutting tips and the junction of the curved portion and the constant diameter portion of the lands is machined to provide a more gradual transition. | 06-24-2010 |
20100166517 | Drill - A drill includes a cutting edge having a ridgeline. The ridgeline has a part of an ellipse and a straight line. It is assumed that the coordinates of a separation point of an ellipse portion from a straight line portion are (x | 07-01-2010 |
20100215452 | TWIST DRILL - A flute spread angle θ in a drill axis-perpendicular section of a spiral flute is defined, a region of the flute taking part in chip treatment is formed along a first circle along an cutting edge of a concave curve and a second circle inscribed in this circle, both of the first circle and the second circle are circumscribed on a third circle expressing the web thickness, the radius R of the first circle and the radius R | 08-26-2010 |
20100316456 | Twist Drill With Negative Axial Rake Transition Between The Lip And The Secondary Cutting Edge - A drill for making a hole within a workpiece has a body extending along a longitudinal axis, at least one flute extending along the body, and a drill point extending from the end of the body. The drill point has a periphery and is comprised of a chisel edge, a primary cutting edge extending inwardly from the periphery, a secondary cutting edge extending outwardly from the chisel edge, and a tertiary cutting edge connecting the primary cutting edge with the secondary cutting edge, wherein the tertiary cutting edge has a negative axial rake angle. A method for producing such a drill point is also disclosed wherein in one grinding pass a gash forms the axial rake angle of the secondary cutting edge, and in a separate grinding pass a portion of the secondary cutting edge is removed to produce a tertiary cutting edge having an axial rake angle that is negative. | 12-16-2010 |
20110081215 | TWIST DRILL - Provided is a double-angle twist drill that increases the quality of drilling without increasing the amount of manufacturing work or the like. A secondary cutting edge | 04-07-2011 |
20110123284 | REAMER TOOL - An improved reamer tool is described that has lower torque requirements, despite having more blades. Because of the lower torque requirements, the reamer can be used with a handheld drill. The reamer uses fewer cutting edges and has blades that do not extend into the material of the pipe. | 05-26-2011 |
20110158757 | ROTARY CUTTING TOOL HAVING SEALED MARGINS AND METHOD OF MAKING SAME - A rotary cutting tool includes a generally cylindrical body having a first end, a second end and a longitudinal axis therebetween. A mounting portion is disposed about the first end, a head portion having an outer diameter is disposed about the second end, and a body relief portion having an outer diameter less than the head portion is disposed therebetween. The head portion is structured to engage and cut a workpiece. A number of flutes extend from the second end of the cylindrical body along the head portion and along at least a portion of the body relief portion. The head portion includes a number of margin relief surfaces, each disposed between adjacent flutes and inset a distance from the outer diameter of the head portion and extending from the second end of the cylindrical body and terminating at a margin seal within the head portion. | 06-30-2011 |
20110170973 | MULTI-BLADE SOLID CARBIDE DRILL - The invention relates to a multi-blade solid carbide drill for cutting high-strength sandwich materials. The tool comprises a shaft section and an adjoining cutting part, into which a number of chip flutes that corresponds to the number of main blades is incorporated. In order to reinforce the curvature of the resulting chip, the chip flute of the drill comprises a chip flute rib in the region of the chip formation zone, said rib protruding from the chip flute surface and having a substantially wave-shaped cross-section ( | 07-14-2011 |
20110170974 | DRILL - It is provided a drill having a plurality of twist grooves disposed around a drill axial center O and main cutting edges formed along their respective twist grooves in opening portions of the twist grooves at a drill tip, the drill being subjected to thinning in the vicinity of the drill axial center O at the drill tip to dispose thinning edges smoothly connected to the main cutting edges, the drill being disposed with the three or more twist grooves and the three or more main cutting edges, the main cutting edges having a negative angle portion in an outer peripheral portion having a radial rake angle φ within a range of −20°≦φ<0° in a bottom view from the drill tip side and a shape curved convexly toward the drill rotation direction, the negative angle portion being formed in a range L not greater than 0.1 D relative to a drill diameter D from an outer peripheral corner, the main cutting edge forming a concave arc shape smoothly recessed such that it projects toward a side opposite to a drill rotation direction beyond a straight line that passes through the outer peripheral corner and the drill axial center O in the bottom view in a portion closer to the drill axial center O than the negative angle portion, and a ratio between a land width angle θ | 07-14-2011 |
20110188956 | Coated twist drill - The present invention concerns a twist drill comprising a shank and a cutting portion which is defined by the axial length of the chip flutes and which is at least partially coated. To provide a twist drill having the aforementioned features and a process for the production thereof, which on the one hand have very good properties in terms of service life and chip formation or chip transport, but which on the other hand are also highly suited for reconditioning including coating, in accordance with the invention it is proposed that the cutting portion has substantially over its useable length a first coating, wherein there is provided a second coating which is different from the first coating only in the region of the tip of the drill and which extends over an axial length which corresponds at a maximum to twice the nominal diameter of the drill. | 08-04-2011 |
20110274509 | CUTTING INSERT WITH HELICAL GEOMETRY AND HOLDER THEREFOR - A cutting tool insert and holder therefore, the drill insert having a helical geometry corresponding to helical flutes in a drill body holder which enable the drill tool assembly to more efficiently remove chips from a hole during operation, the drill insert comprising a drill insert body having a first end opposite a second end, a plurality of helical flutes formed in the drill insert body, a plurality of cutting edges formed at the interfaces of the plurality of helical flutes and the first end of the drill insert body, and an aperture formed in each helical flute. | 11-10-2011 |
20120014760 | Modular Drill - The invention relates to a modular drill including a shank part with an end side. A cutting part can be connected to the shank part at its end side. The shank part has at least one torque transmission element which projects on the end side and has at least one torque transmission face for transmitting a torque in the rotational direction from the shank part to the cutting part. The cutting part has at least one torque receiving region for receiving the torque. The at least one torque receiving region has at least one torque receiving face which corresponds with the torque transmission face. The cutting part has at least one centering element for radially centering the cutting part in relation to the shank part. The cutting part is clamped to the shank part via a clamping element which acts at least predominantly in the axial direction. | 01-19-2012 |
20120020751 | Multi-directionally fluted rotary cutting tool - A rotary cutting tool having a longitudinal body with a rotational axis, comprising a proximal aspect allowing for insertion into an unmotorized or motorized drill, a distal aspect with one or more cutting edges, and two or more fluted segments, among which at least two orientations of fluting are present. A plurality of spacing, shaping, or surfacing may be present between the cutting edge and fluted segments or between fluted segments, and the diameter of the cutting edge may be different than a given point between the distal and proximal aspects of the device. | 01-26-2012 |
20120034043 | CUTTING TOOL WITH UNEQUAL FLUTE SPACING - A cutting tool having a shaft with a longitudinal axis, wherein the cutting tool includes a first flute extending about the longitudinal shaft along a helix angle and a first cutting edge adjacent the first flute. The cutting tool also includes a second flute extending about the longitudinal shaft along a helix angle and a second cutting edge adjacent a second flute. The cutting tool further includes a third flute extending about the longitudinal shaft along a helix angle and a third cutting edge adjacent the third flute. The first cutting edge, the second cutting edge, and the third cutting edge are unequally angularly spaced from each other. | 02-09-2012 |
20120201619 | Drill - Twist drill for short hole drilling with two chip flutes opening in a clearance surface of a front tip to form, with the clearance surface, two cutting edges. Chip flutes have three different part surfaces having different curvatures—a bottom surface with arc radius less than 10 mm and two other ones with radius of curvature approaching infinity. Boundary line between concave bottom surface and heading frontal surface meets a main edge that is included in the individual cutting edge and divided into two edge segments imparting a J-like shape to the main edge. The chip flute is extraordinary deep with the diameter (DC) of the core reduced to a minimum and the opening angle (α) smaller than the angle of divergence (β) of two bars, between which the flutes are countersunk. The drill improves-formation and evacuation of chips, is easy-cutting and requires a minimum of energy. | 08-09-2012 |
20120288340 | Damaged Bolt and Screw Removing Devices - A bit for removing a broken fastener comprises a tip from which extend two or more notches separated by traction or biting surfaces formed from two-sided frusto-conically-shaped regions. The surfaces are bounded on one side by a nonlinear cutting edge and on the other side by a non-cutting edge and are configured to cut into the fastener when the bit is rotated in a direction opposite to the fastener's direction of engagement. Specific embodiments include configurations where the cutting edges extend at different angles with respect to the bit axis, where the biting surfaces comprise a plurality of serrations, and where the cutting edges are separated by flutes which spiral along a longitudinally extending periphery of the bit. | 11-15-2012 |
20130045058 | DRILLING TOOL - A drilling tool includes at least two chip flutes and a chisel edge with a thinned region. The thinned region merges continuously into the chip flutes in such a way that the thinned region forms the end of the respective chip flute in the region of the chisel edge. | 02-21-2013 |
20130115020 | ROCK DRILLING TOOL FOR ROTATIONAL PERCUSSIVE MACHINING OF CONCRETE, ROCK, MASONRY AND SUCH MATERIALS - A rock drilling tool includes a drilling head provided with a cutting body and a helix arranged between the drilling head and a shaft. The cutting body extends continuously over a nominal diameter of the rock drilling tool and has an inner region configured as a centering tip and an outer region bordering the centering tip in the radial direction. The outer region is offset towards the rear in relation to the centering tip in the active direction of the rock drilling tool. The centering tip is configured as a pyramid or a truncated pyramid and has pyramidal edges with lateral surfaces located therebetween. At least one lateral surface of the centering tip is configured as a cavity. | 05-09-2013 |
20130183113 | TWIST DRILL AND METHOD FOR THE PRODUCTION THEREOF - A twist drill includes a drill body having a chip flute extending a distance along the drill body. The chip flute has a leading edge and a run-out edge running along the chip flute. The run-out edge is disposed behind the leading edge in a direction of rotation of the twist drill. The chip flute, viewed cross-sectionally in a direction perpendicular to the longitudinal axis, includes a first wall portion and a second wall portion. The first wall portion extends along a curve between the run-out edge and the second wall portion. The second wall portion extends in a straight line from between the leading edge and the first wall portion. The first wall portion and the second wall portion are disposed adjoining one another and together define a J-shaped cross-sectional profile perpendicular to the longitudinal axis. | 07-18-2013 |
20140140782 | DRILL BIT - The invention relates to a rock drill comprising an insertion portion, a flute adjoined to the insertion portion, and a head portion adjoined to the flute, wherein the flute is of at least double-spiral configuration and correspondingly has at least two substantially spiral discharge grooves, to which respectively two substantially spiral flute webs forming the lateral groove walls are assigned. It is proposed that a constant spiral pitch is assigned to the first discharge groove, inclusive of the lateral groove walls thereof, along the drill longitudinal axis, and that at least one of the two flute webs assigned to the first discharge groove has or have along the drill longitudinal axis, at least in sections, a web spine width which changes, in particular, alternately. | 05-22-2014 |
20140193220 | BIT EXCHANGEABLE DRILL - A bit exchangeable drill includes a detachable cutting head at the tip of a drill body, and the cutting head includes a cutting edge extending linearly from a rotation center to a radial outer end in axial end view, and a helical flute. At a rake face continuous with the cutting edge, a thinning face inclined relative to the rotation axis and rendering an axial rake angle of the cutting edge negative is formed entirely from a radial inner end to a radial outer end of the cutting edge. | 07-10-2014 |
20140271008 | METHOD OF JOINING SINTERED PARTS OF DIFFERENT SIZES AND SHAPES - A method of joining a plurality of parts to form a unitary body includes providing at least two sintered parts. Each of the parts is formed of a hard metal composition of material. The sintered parts are assembled into the shape of a unitary body. Each of the sintered parts has a joining surface and when each joining surface is brought into contact the surfaces form a bonding interface therebetween. The assembled sintered parts are subjected to a temperature sufficient to fuse the sintered parts together at the bonding interface to form the unitary body. A wear resistant tool includes a plurality of sintered parts, each of the sintered parts is formed of a hard metal composition of material, wherein the plurality of sintered parts can be assembled into a unitary body, wherein the assembled parts are fused together at a respective bonding interface to form the unitary body. | 09-18-2014 |
20140341667 | DRILL BODY OF INDEXABLE DRILL - A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip. | 11-20-2014 |
20150104265 | 3-BLADE DRILL - A three-flute drill includes: three chip discharge flutes; and three cutting edges each having concavely-curved and convexly-curved cutting edge portions, an axially perpendicular cross-sectional view orthogonal to an axial center having first convex and concave curves respectively corresponding to the convexly-curved and concavely-curved cutting edge portions intersecting each other, in the axially perpendicular cross-sectional view, a concave amount of the first concave curve being within a range of 0.01 D to 0.05 D in terms of a drill cutting diameter relative to a reference line connecting an outer circumferential point, at which a drill outer circumferential portion intersects with the first convex curve, and the axial center, and in the axially perpendicular cross-sectional view, a rake chamfer width being a distance from an intersection between a straight line through the intersection and orthogonal to the reference line and the reference line, to the outer circumferential point, and being within 0.005 D to 0.06 D. | 04-16-2015 |
20150104266 | MODULAR CARRIER TOOL AND TOOL HEAD - The modular carrier tool ( | 04-16-2015 |
20150298219 | DRILL BIT STRUCTURE - The present invention relates to a drill bit structure which comprises a body. The body has a free end, an intermediate section and a connection end. The body comprises a first groove portion, a second groove portion, a third groove portion, a fourth groove portion and a fifth groove portion. The first groove portion is partially overlapped with the third groove portion from the free end. The second groove portion is partially overlapped with the fourth groove portion from the free end. After extending a preset axial distance from the free end, the first groove portion and the second groove portion are partially overlapped with each other by forming an intersecting protrusion. The fifth groove portion is extended from the intermediate section toward the connection end. The first, second, third and fourth groove portions are extended to the fifth groove portion. | 10-22-2015 |
20150314378 | TWIST DRILL - A twist drill has a shaft and a flute portion, which extends between a drill tip and the shaft and has at least two flutes, which run helically around it at an angle of twist, are separated from one another by two webs and have a land extending between the flutes on the circumference of the flute portion. In order to provide a twist drill that has the features mentioned at the beginning, has better lubrication of the round bevels, less wear, improved guidance and improved concentricity, at least two round bevels that are spaced apart from one another are provided on each land and extend on the land at an angle of inclination in relation to the drill axis that is greater than the angle of twist but less than 90°. | 11-05-2015 |
20160074945 | TWIST DRILL AND PRODUCTION METHOD - The twist drill ( | 03-17-2016 |
20160129506 | Drill - A drill with a drill flute ( | 05-12-2016 |
20160144436 | DRILL - The drill ( | 05-26-2016 |
20160375500 | DRILL BIT - A drill bit has a shank, an intermediate shaft, and a cutting head and defines a longitudinal axis. The cutting head has a body having a front end, a rear end, and a peripheral sidewall, a primary cutting insert and a pair of auxiliary cutting inserts. The primary cutting insert is cross-shaped with a central portion with a cutting tip and four cutting arms each with a cutting edge extending radially outward from the central portion past the peripheral sidewall. The auxiliary cutting inserts are spaced radially outward from the central portion and circumferentially from the radial cutting arms, and have a cutting edge extending radially outward past the peripheral sidewall. A pair of primary dust egress slots and a pair of auxiliary dust egress slots are formed in the peripheral sidewall and configured to channel debris from the front end to the rear end of the body. | 12-29-2016 |
20170232529 | DRILL | 08-17-2017 |
20180021861 | DRILL STRUCTURE | 01-25-2018 |