| TaeguTec Ltd Patent applications |
| Patent application number | Title | Published |
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| 20120003053 | Tool Holder Clamp Assembly for Cutting Inserts and Its Pressing Plate - A clamp fastens a cutting insert to a tool holder. The clamp assembly includes a body portion provided with a screw hole, a forward protrusion formed at the front portion of the body and extending downward, a rear protrusion formed at the rear end portion of the body and extending downward, and a bridge connecting the forward protrusion and the central portion of the body. The clamp assembly also includes a pressing plate having upper and lower surfaces, a front nose portion, a rear end portion, and is provided with a keyhole shaped groove having an enlarged inner cavity open toward the rear end by a narrow neck extending thicknesswise. The forward protrusion is inserted into the enlarged inner cavity and the bridge is inserted into the narrow neck of the keyhole groove so that the pressing plate is coupled to the clamp. | 01-05-2012 |
| 20110305534 | Cutting Tool for Drilling and Turning - The present invention relates to a cutting tool capable of both drilling and internal/external turning. The cutting tool comprises a generally triangular-shaped cutting insert and a tool holder. On each side, the triangular-shaped cutting insert forms a major cutting edge and a minor cutting edge, which is shorter than said major cutting edge. Two adjacent major cutting edges form an angle of 60° therebetween, while adjacent major and minor cutting edges intersecting at a corner of the triangular shape of the cutting insert form an angle of 80 to 89° therebetween. The cutting insert is mounted in a pocket so that one of the major cutting edges of the cutting insert is projected in an axially forward direction of the tool holder, while the minor cutting edge on the side adjacent to the projected major cutting edge is projected in a radially outward direction of the tool holder. | 12-15-2011 |
| 20110255924 | Exchangeable Cutting Insert - A cutting insert having a plurality of corner cutting edges has an upper face, a lower face, two longitudinal side faces and two transversal side faces connecting the upper face and the lower face. A through hole passes through central parts of the upper face and the lower face. The longitudinal side faces are opposite to each other and normal to both upper and lower faces, as are the transversal side faces. The upper face and the lower face are each provided with two chip discharge grooves, each chip discharge groove extending along a corresponding one of the transversal side faces, the two chip discharge grooves being inclined oppositely in the transverse direction so that the upper face and the lower face are each provided with two corner cutting edges at diagonally opposite corners. The longitudinal length of the insert is longer than the transversal length of the insert. The cutting insert can be mounted stably to a small-diametered cutter with a sufficient mounting surface. | 10-20-2011 |
| 20110243672 | Double Sides Cutting Insert and Cutting Tool With The Same - A cutting tool includes a tool body and at least one double-sided cutting insert mounted in an insert pocket of the tool body. The at least one double-sided cutting insert includes: an elliptical top surface; an elliptical bottom surface; first and second side surfaces connecting between both side ends of the top and bottom surfaces, respectively; a pair of corners connecting between both side ends of the first and second side surfaces, respectively; first and second cutting edges formed at a boundary portion between the top surface and the first side surface and a boundary portion between the bottom side surface and the second side surface and having a curved shape, respectively. | 10-06-2011 |
| 20110236143 | Cutting Insert - A cutting tool has a main body provided with a pocket part and a cutting insert seated in the pocket part. The pocket part includes at least one side wall and bottom surface. The bottom surface of the pocket part includes a pocket part base surface, a first pocket part inclined surface connected to an inner end of the base surface on an inside of the main body, and a second pocket part inclined surface connected to an outer end of the base surface on an outside of the main body. The cutting insert has an upper surface, a lower surface and side surfaces connecting the upper surface and the lower surface. The lower surface of the cutting insert includes an insert base surface, a first inclined surface inclined upwardly from a first side of the base surface towards a first side surface, and a second inclined surface inclined upwardly from a second side of the base surface towards a second side surface. The cutting insert is seated in the pocket part such that the second inclined surface of the cutting insert abuts the second pocket part inclined surface and the insert base surface is spaced apart from the pocket part base surface. | 09-29-2011 |
| 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 |
| 20110222974 | Cutting Insert Having Grooves Formed Between Adjacent Cutting Edges - A cutting insert has a structure by which a sufficient surface area is in contact with a tool holder and cutting fluid can be smoothly flowed. The cutting insert has an upper face, a lower face, a plurality of side faces connecting the upper face and the lower face and a through hole passing through the upper face and the lower face, the upper face being divided into a periphery region disposed adjacently to cutting edges formed by the upper face and the side faces, and a central protruded region disposed between the through hole and the periphery region and surrounding the through hole, the central protruded region being placed higher than the edges. The periphery region is formed along all the cutting edges and includes a descent face inclined downward from a given cutting edge to the central protruded region, a bottom face and an ascent face inclined upward from the bottom face to the central protruded region. A plurality of grooves are formed on the central protruded region of the upper face, each groove being formed such that both ends of the groove are directed to adjacent cutting edges. | 09-15-2011 |
| 20110192266 | Cutting Tool and Method for Treating Surface Thereof - A method for treating a surface of a cutting tool includes first blasting the surface of the cutting tool using a granular abrasive and then brushing the blasted surface of the cutting tool. The surface condition of the cutting tool is improved, thereby achieving superior resistance to chipping while cutting a workpiece and excellent durability by means of improvement in abrasion resistance and toughness. | 08-11-2011 |
| 20110164933 | CLAMPING DEVICE FOR A CUTTING INSERT - An insert clamp secures a cutting insert having a central hole to a tool holder. The clamp includes a forward protrusion to be received in the central hole of the insert, a central body portion provided with a pressing part to press down the upper surface of the insert and a screw hole for a clamping screw to pass through, and a rear protrusion having a rear contact surface to come in contact with a rearward slanting surface of the tool holder. The forward protrusion is formed on the forward end of the insert clamp, an inside surface of the forward protrusion extends downward in a spaced state apart from the inner wall of the central hole of the insert, and a distal portion of the inside surface the forward protrusion is provided with a protuberance of convex curved surface to come in tangential contact with the inner wall of the insert. The pressing part is formed on the bottom surface of the central body portion of the insert clamp, and has convex curved surfaces to come in tangential contact with the upper surface of the insert on both regions of the bottom surface of the central body portion which is bisected by a central line passing through the forward protrusion and the screw hole. | 07-07-2011 |
| 20110164932 | Cutting Insert and Milling Cutter Provided with the Same - A milling cutter is provided with a cutting insert having improved main cutting edges. The main cutting edges are positioned along both lengthwise edges of a front surface, have a wave shape and are asymmetrical with each other. Main cutting edges positioned along both lengthwise edges of a back surface are rotationally symmetrical by 180 degrees from the main cutting edges of the front surface with respect to a longitudinal central axis of the cutting insert. In the milling cutter, the cutting inserts are alternately mounted in pockets formed on a side surface of the milling cutter so that the concavo-convex portions of the active main cutting edges of the cutting inserts which are adjacent to each other are staggered with respect to each other. | 07-07-2011 |
| 20110097165 | Cutting Tool and Cartridge for the Same - A cutting tool for machining metallic materials has at least one cutting portion having a cartridge and a cartridge pocket for mounting cutting inserts to the cutting tool. The cartridge pocket has a top surface, a rear supporting surface and a bottom supporting surface. The top surface of the cartridge pocket has one or more serrated projecting portions. The cartridge has an insert pocket, a top surface, a first side surface and a bottom surface. The insert pocket of the cartridge receives a cutting insert. The top surface of the cartridge has one or more outwardly sloped surfaces and one or more inwardly sloped surfaces. The outwardly sloped surfaces mate with the serrated projecting portions. The inwardly sloped surfaces have a gap with respect to the projecting portions of the cartridge pocket. | 04-28-2011 |
| 20110070039 | Cutting Insert with Protrusions Formed at Corner Area Thereof - A cutting insert has an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface and a central hole formed at a central portion thereof. The cutting insert has a flat seating surface formed on a highest level of the upper surface, a plurality of side cutting edge portions formed at intersections of the upper surface and the side surfaces, and a corner cutting edge portion formed at an intersection of two adjacent side cutting edge portions and having a cutting edge formed at a front end thereof. A land portion, a downward inclined surface, a corner bottom surface, a first protrusion, an upward inclined surface and the seating surface are formed on the corner cutting edge portion sequentially along a diagonal line directed from the cutting edge to the central hole. A pair of second protrusions are formed and disposed symmetrically on both sides of the diagonal line so that the corner bottom surface is surrounded by the downward inclined surface, the first protrusion, and the second protrusions, and the corner bottom surface has the smallest height and the seating surface has the largest height along the diagonal line. | 03-24-2011 |
| 20100303569 | Rotating Tool for Processing Holes Provided with Cartridges Having Cutting Inserts - A rotating tool includes a tool body, an outer cartridge, an inner cartridge and one or more setting plates. The tool body includes a pocket for the inner cartridge and a pocket for the outer cartridge. The outer cartridge has at least one cutting insert and a bolt through-hole extending toward a peripheral portion of the tool body. The outer cartridge is mounted on the pocket for the outer cartridge by means of a bolt. The setting plate is positioned to contact both the outer cartridge and the pocket for the outer cartridge. Screw holes for mounting the setting plate are formed on a side face of the outer cartridge adjacent to a rotating axis and through-holes are formed on the setting plate. This is so that the setting plate can be mounted on the side face of the outer cartridge by setting screws. | 12-02-2010 |
| 20100239379 | Cutting Insert - A cutting insert of the present invention has a body, auxiliary cutting edges of a convex curve shape and main cutting edges. The body has a top surface, a bottom surface, side surfaces connecting the top and bottom surfaces, and corner surfaces connecting the adjacent side surfaces. The auxiliary cutting edges are formed at intersections between the top and bottom surfaces and the side surfaces. The main cutting edges are formed at intersections between the top and bottom surfaces and the corner surfaces. The main cutting edge in the top surface extends from an end of an adjacent auxiliary cutting edge to its center in a direction toward the bottom surface and from the center to an end of another adjacent auxiliary cutting edge in a direction away from the bottom surface. | 09-23-2010 |
| 20100183381 | CUTTING INSERT AND CUTTING TOOL THEREWITH - The present invention provides a cutting insert and a cutting tool used with the same. A tool body includes at least one seating surface and a threaded hole extending as slanted with respect to the seating surface. At least one cutting insert having a mounting hole passing therethrough is removably secured on the seating surface. A screw passes through the mounting hole and is fastened to the threaded hole, thereby removably securing the cutting insert to the tool body. A wall surface of the mounting hole contacts a head of the screw about at least one first contact portion and at least one second contact portion. The first contact portion is formed at a level different from that of the second contact portion along a longitudinal axis of the mounting hole. Contact angles at the first contact portions and the second contact portions are different from each other. | 07-22-2010 |
| 20100181694 | Device and Method for Manufacturing End Mill - A device and a method for manufacturing an end mill in which the amount of grinding of a blank end mill is small. The device for manufacturing an end mill includes: upper and lower punches; a die; a feed box for supplying a powder of material for the end mill; and a cleaner for eliminating the powder from a top surface of the die. The upper and lower punches are movable up and down relative to each other and have a lengthwise molding cavity formed thereon. The die has a penetrating slit sized to be approximated to the width of the upper and lower punches. The penetrating slit allows the up-and-down movements of the upper and lower punches. The feed box supplies the powder into a space formed by the wall of the penetrating slit and the lower punch. | 07-22-2010 |
| 20100178122 | Drill with Cutting Inserts - A drill has inner and outer inserts. The drill includes a drill body having a rotational axis; an inner insert mounted adjacent to the axis at a proximal end of the drill body having an axis-symmetrical contour having four cutting edges and four rounded corners; and an outer insert identical to the inner insert being mounted farther away from the axis than the inner insert. Loci of the inner and the outer insert partially overlap. At the overlapping region, the cutting edge of the inner insert and the cutting edge of the outer insert extend toward the axis in a direction to a workpiece and the locus of the cutting edge of the inner insert protrudes in a direction to the workpiece along the axis of the drill body compared to the locus of the cutting edge of the outer insert. | 07-15-2010 |
| 20100119773 | Coated Cemented Carbide Cutting Tools and Method for Pre-Treating and Coating to Produce Cemented Carbide Cutting Tools - A method of a pre-treatment process for coating notably improves both the surface roughness of a coating layer of a cemented carbide cutting tool and the bonding force of the coating layer to the substrate. According to the method, a sintered surface layer within a range of 0.5-5 μm, which corresponds to the tungsten carbide particle size of a substrate, is properly removed from the substrate surface of a cemented carbide cutting tool. Thus, a porous sintered surface layer having a non-uniform structure is removed and a substrate surface having high structure density and evenness is provided compared to blasting pre-treatment. In order to obtain a sufficient bonding force between a coating layer and the substrate, the surface ratio of open pores, which exist around tungsten carbide particles appearing by removal of the porous sintered surface, is equal to or more than 5%. | 05-13-2010 |
| 20100024507 | Rolling Mill and Roll Thereof - A roll coupled to a separately manufactured axle rotates together with the axle in order to perform a rolling process. The roll includes an inner cylindrical surface, an outer cylindrical surface and both side faces, and at least one key way provided on at least one of the side faces is arranged adjacent to the inner cylindrical surface rather than said outer cylindrical surface, The key way is in a concave curved shape and is a portion of a spherical surface or of an ellipsoidal surface. | 02-04-2010 |
| 20090148245 | CUTTING TOOL - The present invention is directed to a cutting tool, comprising: at least one cutting insert; a tool body including a pocket portion to which the cutting insert is mounted; a means for fixing the cutting insert to the pocket portion of the tool body; and a screw for finely adjusting the position of the cutting insert fixed to the pocket portion of the tool body. The screw has a head portion, a threaded portion and a portion for connecting the head portion to the threaded portion. The pocket portion has a bottom surface with a screw hole formed thereon into which the threaded portion is fastened. It also has a side wall comprising a surface for closely contacting the head portion of the screw. The head portion of the screw closely contacts and resiliently pressurizes the close contact surface of the pocket portion when the threaded portion is fastened into the screw hole. | 06-11-2009 |
| 20090116920 | Rotary Cutting Tool - The present invention discloses a rotary cutting tool which can maintain a secure coupling state between the shank and the cutting head and enhance the durability of the shank by preventing a damage of the shank and the cutting head from being generated. In the rotary cutting tool according to the present invention, the cutting head comprises a central post in a cylindrical shape which is concentric with the rotating axis of the drill body and a plurality of wings formed at the upper end of the central post extending in the radial direction, each of the wings has an end surface, an upper surface, a lower surface, a forward surface which is facing the drill rotational direction, and a rearward surface opposite to the forward surface, the forward surface being provided with the chip flute extended over to the lateral wall of the central post, the lateral wall of the central post consisting of cutouts forming the chip flutes and the circular outer circumferential surfaces, the circular outer circumferential surface of the central post being provided with rotation guide element thereon extending in a circumferential direction. The coupling structural means comprises a plurality of coupling limbs extending from the circumferential portion of the tool shank in parallel with the rotating axis to provide a central opening therebetween for receiving the central post, each of the coupling limbs consisting of a torque bearing part in the upper portion and a frictional fastening part in the lower portion, the torque bearing part being provided on the side of the drill rotational direction with a recess delimited by an axial bearing surface and a torque bearing surface for resting one of the wings therein, the inner wall of the frictional fastening part having a transversal cross section of a circular arc such that the inner wall of the frictional fastening part has a surface contact with the circular outer circumferential surface of the central post, the inner walls of the frictional fastening parts being provided with coupling elements engageable with rotation guide elements of the central post. | 05-07-2009 |
| 20080279645 | TOOL ASSEMBLY - The present invention discloses a tool assembly being capable of reducing considerably an axial length of a working member (tool), in particular, a length of a male spigot to be coupled with a coupling member and transmitting a torque to a working member without generating a loss by means of a secure coupling between a male spigot of a working member (tool) having a short length and a coupling member. A tool assembly according to the present invention comprises a tool including a head to be approached to a work-piece, a male spigot extended from a rear end of the head and a flange formed at a border portion between the head and the male spigot and having a ring shaped flat rear surface; and a coupling member consisting of a first section having a cavity formed on a central portion of a front side thereof for receiving the male spigot and a second section formed at a rear side of the first section and connected to a driving means. The male spigot has a tapered surface formed on a side thereof, a through hole communicated with the cavity is formed on a side of the first section of the coupling member, and an end of a coupling screw coupled with the through holes is capable of pressurizing the tapered surface of the male spigot received in the cavity. | 11-13-2008 |
