| OSG CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120134761 | SPIRAL FLUTED TAP AND METHOD FOR MANUFACTURING THE SAME - A spiral fluted tap is provided which includes a threaded portion having an external thread corresponding to an internal thread to be cut and a cutting edge formed along a spiral flute formed to divide the external thread, and being screwed into a prepared hole that is provided on a workpiece to cut an internal thread by the cutting edge on an inner circumferential surface of the prepared hole with discharging chips toward a shank via the spiral flute, the spiral flute having a stepped portion at a rear end of a chamfer portion or in a portion on a shank side from the rear end of the chamfer portion in the threaded portion, and a flute bottom diameter on a distal end side of the spiral fluted tap from the stepped portion being smaller than a flute bottom diameter on a shank side from the stepped portion. | 05-31-2012 |
| 20120121347 | BEVEL HEAD REPLACEABLE ROTARY TOOL, BEVEL HEAD AND TOOL BODY - A bevel head replaceable rotary tool is provided. The rotary tool includes a coupling protrusion and a coupling recess, plural sets of serrations provided on an outer circumferential surface of the coupling protrusion and an inner wall surface of the coupling recess, circumferential abutting portions provided on the tool body and the bevel head, and axial tight-contact portions, provided on the tool body and the bevel head. The serrations of the coupling protrusion and the serrations of the coupling recess arranged such that curvatures of circumferential circular arcs of the serrations of the coupling protrusion are greater than those of the serrations of the coupling recess or the serrations of the coupling protrusion and the serrations of the coupling recess have circumferential circular arcs with centers deviated from each other. | 05-17-2012 |
| 20120107063 | THREAD FORMING TAP - A thread forming tap has a full thread portion and a leading portion contiguous with the full thread portion and reducing in diameter toward its tip. The full thread and leading portions are provided with external thread on which lobes and recesses are alternately formed. When δ represents an angle around a tool center line toward a thread forming side, the shape of the lobe varies along a quadratic curve relative to angle δ so that relief amount increases toward inflection point angle θ. However, in a rough plastic deformation section where angle δ is greater than inflection point angle θ and exceeds the working region, the shape varies along an Archimedean curve with clearance angle α1 so that the relief amount increases linearly relative to angle δ, and a margin section is substantially zero or within a range where angle δ is less than or equal to 1°. | 05-03-2012 |
| 20120093602 | MACHINING HEAD REPLACEABLE ROTATING TOOL, HOLDER, AND MACHINING HEAD - A machining head replaceable rotating tool having a fastening male screw and a fastening female screw disposed on respective shaft centers of one and the other of a machining head and a holder, the fastening male and female screws being threadably engaged with each other to concentrically and removably attach the machining head to a tip portion of the holder, the machining head and the holder being disposed with abutting surfaces abutted against each other in a fastened state when the fastening male and female screws are threadably engaged, the machining head replaceable rotating tool being integrally and rotationally driven via the holder in a tool rotation direction causing the fastening male and female screws to be fastened by a machining load to perform predetermined machining with the machining head, the abutment of the abutting surfaces preventing the fastening male and female screws from being further fastened by a machining load, the fastening male and female screws being saw-tooth buttress screws having a following flank angle α smaller than a leading flank angle β. | 04-19-2012 |
| 20120003054 | TAP WITH DRILL AND METHOD FOR CUTTING INTERNAL THREAD - A tap with drill includes a drill portion including a plurality of chip discharge grooves and having drill blades for cutting a prepared hole. The tap further includes a tap portion for cutting the internal thread on an inner circumferential surface of the prepared hole formed by the drill blades, and oil holes. The tap with drill is applied for performing cutting work. The drill blades and thread cutting edges include three blades formed along chip discharge grooves, respectively. The oil holes are helically formed in three with the same leads as the chip discharge grooves and opened at relief surfaces of the drill blades, respectively. The chip discharge grooves straddle the drill portion and the tap portion in fixed groove sectional shapes and have negative lands swelled into grooves. | 01-05-2012 |
| 20110200404 | SPIRAL TAP - A spiral tap is disclosed having a thread portion having an external thread, spiral flutes which is fluted in the same direction as a cutting/rotating direction, as seen in a direction away from a shank side, to divide the external thread, and cutting edges formed along the spiral flutes; the thread portion including a full thread portion having a fixed outer diameter, and a chamfer portion decreasing in outer diameter toward a tap end; the chamfer portion being screwed into a prepared hole to cut an internal thread on an inner circumferential wall of the prepared hole and to discharge chips along the spiral flutes toward the shank; the chamfer portion having an external thread with screw threads which is formed such that outer circumferential portions are removed, at a linear line for cutting as seen from a direction perpendicular to a cross-section involving an axis O, from the screw threads having the same dimension as that of the full thread portion; and the linear line intersecting the axis O at an inclined angle θ falling in a range of −15°≦θ≦30′ with a side decreasing in diameter toward the tap end being defined positive. | 08-18-2011 |
| 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 |
| 20110129311 | METHOD OF CUTTING TREE-SHAPED GROOVE AND ROTARY CUTTING TOOL - In cutting processes of a tree-shaped groove, in a rough cutting process, by using a rough cutting tool ( | 06-02-2011 |
| 20110117342 | HARD COATING FILM AND HARD COATING FILM COATED WORKING TOOL - A hard coating film formed on a surface of a predetermined member and having excellent wear resistance and adhesion resistance, the hard coating film includes: a three-layer structure composed of a third layer formed in contact with the surface of the predetermined member, a second layer formed on the third layer, and a first layer formed on the second layer to constitute the surface; the first layer being made of (Cr | 05-19-2011 |
| 20110091297 | THROWAWAY ROTARY CUTTING TOOL - In a semi-finishing cutter, rectangular tips and square tips are disposed in a staggered pattern in an axial direction in second to fourth step portions, so a single cutting edge is formed by a pair of one of the rectangular tips tips and one of the square tips. It is therefore possible to effectively reduce a frequency of contact with a blade root. A cutting speed of the semi-finishing cutter may be increased and a cutting feed may be made faster, so work in a semi-finishing process may be performed efficiently. The rectangular tips and the square tips have simple shapes, so known commercially available throwaway tips may be used. Accordingly, it is possible to provide the semi-finishing cutter in an easy-to-use form without increasing the cost. | 04-21-2011 |
| 20110091293 | THROWAWAY ROTARY CUTTING TOOL - In a rough cutting cutter, square tips and rectangular tips are disposed in a staggered pattern in an axial direction in second to fourth step portions, so a cutting edge is formed by a pair of one of the square tips and one of the rectangular tips. It is therefore possible to effectively reduce a frequency of contact with a blade root. Furthermore, in the second to a fifth step portions, ARs (rake angles in the axial direction) and RRs (rake angles in a radial direction) of the square tips and the rectangular tips gradually increase in order from a tip end to a back end of a tool body. It is therefore possible to suppress chatter vibration during machining and is possible to reduce roughness of a cut surface of a work material. | 04-21-2011 |
| 20110020087 | THREAD FORMING TAP - A thread forming tap having a complete thread portion, formed with a predetermined back taper with that decreases rotational torque during tapping work, which reduces load acting on first complete protruding portions, formed at an extreme leading end of the complete thread portion, and thereby suppressing degradation in service life of the tool due to wear or the like | 01-27-2011 |
| 20100260568 | THREAD MILLING CUTTER - As shown in a development view of FIG. | 10-14-2010 |
| 20100212210 | DLC-COATED FISHING LURE - A DLC-coated fishing lure includes a fishing lure base material made of metal and having a predetermined shape; an intermediate layer made of one selected from a first group, a second group and a third group, the first group consisting of at least one kind of metal selected from the IIIb group, the IVa group, the Va group and the VIa group in the periodic table of elements, the second group consisting of at least one of a carbide, a nitride and a carbonitride of the at least one kind of metal, and the third group consisting of a mutual solid solution made of at least one selected from the first group and the second group, the intermediate layer being formed on a surface of the fishing lure base material; and a DLC layer having a thickness ranging from about 0.05 μm to about 0.55 μm and formed on the intermediate layer, the DLC layer presenting an appearance of a interference color. | 08-26-2010 |
| 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 |
| 20100009766 | GROUP OF TAPS WITH PREPARED HOLE CUTTING TOOLS | 01-14-2010 |
| 20100003091 | Diamond Cutting Member and Method of Making the Same - A shank has a mount reference surface formed with a mount seat having a mount seat surface inclined at a given inclined angle α. A diamond raw material is held on the shank in an attitude such that a first bottom surface thereof is in tight contact with the mount seat surface, and a first apex is protruded forward nearly along a centerline of the shank. A portion of the first apex, protruding from the mount reference surface, is ground and removed as a given inclined angle θ. This causes a surface or its vicinity (in a value less thank approximately ±1°) to be formed as a raked face. The first bottom surface of the diamond raw material is held intact in tight contact with the mount seat surface to be integrally bonded thereto by active metal brazing, easily ensuring an increased bonding surface area to easily obtain increased bonding strength. This results in a further remarkable reduction in manufacturing time and manufacturing cost as those achieved in a case where a portion of a seconds apex opposite to the first apex formed with the raked face is grounded and removed to forma a bonding member. | 01-07-2010 |
| 20090320551 | Thread rolling die - A thread rolling die having a nitride diffusion layer formed in a surface layer portion of a form rolling surface portion for thread rolling to plastically deform a surface of a workpiece, the nitride diffusion layer being formed in an ion nitriding treatment such that a compound layer depth is 1 μm or smaller, a practical nitride layer depth ranges from 5 to 40 μm, and either of that a surface hardness is 1300 HV or larger or that a surface hardened amount is 400 HV or larger. | 12-31-2009 |
| 20090317203 | SPIRAL FLUTED TAP - As shown in FIG. | 12-24-2009 |
| 20090255805 | Removing Method of Hard Coating Film - A hard coating film is efficiently etched by a krypton ion beam of comparatively large mass, and then it is slowly etched by an argon ion beam of small mass. As a result, a coating film removing operation can be performed in a short time with suppressing an influence of the coating film removal on a tool base material (changes in shape and dimension) to the minimum. Since both krypton and argon are an inert gas, even upon the surface of the tool base material being exposed, the surface weakness by chemical erosion can be completely prevented. As a result, even when a hard coating film coated working tool is reproduced by re-coating the tool base material with the hard coating film, the hard coating film is coated by excellent adhesion strength. | 10-15-2009 |
| 20090214311 | Spiral tap - As shown in FIG. | 08-27-2009 |
| 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 |
| 20080268967 | Thread Forming Tap and Method for Manufacturing the Same - A cold forming tap and a method of manufacturing the cold forming tap. Since the following side margin M | 10-30-2008 |
