OSG Corporation

Japan

OSG Corporation

Japan

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Patent
OSG Corporation | Date: 2017-07-26

Providing a formed rotary cutting tool that restrains occurrence of breakage. At least a first valley portion 44 as a neck portion in which a cutting edge diameter of a peripheral cutting edge 38 is locally minimized is provided with a roughing portion 58b as a fine roughing portion that is different in characteristics from a roughing portion 58a provided in a portion or portions other than the above-described at least the first valley portion 44. For example, where the roughing portion 58b provided in at least first valley portion 44 has characteristics that make cutting chips small, it is possible to restrain clogging of the cutting chips in at least first valley portion 44 and accordingly to advantageously restrain occurrence of breakage. That is, it is possible to provide the christmas-tree cutter 30 capable of restraining occurrence of the breakage.


Patent
OSG Corporation and Tohoku University | Date: 2016-10-05

Provided are: a hard lubricating coating film which is hard and has wear resistance; and a hard lubricating coating film-covered tool. A hard coating film (10), which is hard and has wear resistance, and an end mill (12) can be obtained by alternately forming two or more (CraMobWcVdBe)1-x-yCxNy layers A (22) and two or more (CraMobWcVdBe)1-x-y-zCxNyOz layers B (24) by controlling the composition ratios of Cr, Mo, W, V and B and various reaction gases during the film formation, or alternatively by controlling only the various reaction gases during the film formation. In this connection, the atomic ratios a-e, y and (x + y) of the layers A (22) are within predetermined ranges; the atomic ratios a-e, x, y, z and (x + y + z) of the layers B (24) are within predetermined ranges; the film thickness (D1) of the layers A (22) is within the range from 2 nm to 1,000 nm (inclusive); the film thickness (D2) of the layers B (24) is within the range from 2 nm to 500 nm (inclusive); and the total film thickness (D) is within the range from 0.1 m to 10.0 m (inclusive).


Patent
OSG Corporation and Tohoku University | Date: 2016-02-03

Provided is a hard film for machining tools, having excellent friction resistance, deposition resistance, and smoothness. As a result of this hard film (30) adhered to a rolling tap (10), a TiCrMoWV oxycarbide, oxynitride, or carbo-oxynitride, having a phase having a NaCl-type crystal structure as the main phase thereof, has fine crystals of no more than 100 nm as a result of the introduction of oxygen. As a consequence, the surface of the hard film becomes extremely smooth and a low friction coefficient can be obtained, therefore friction resistance, deposition resistance, and smoothness can be obtained, and tool life can be extended because the hard film has excellent smoothness and a low low-friction coefficient, in addition to friction resistance and deposition resistance.


Patent
OSG Corporation | Date: 2015-04-08

Each cutting blade (12) has an outer peripheral side cutting blade portion (12a) shaped like a convex curve and an inner peripheral side cutting blade portion (12b) shaped like a concave curve. On the cross section perpendicular to the axis, the first convex curve (CL1) corresponding to the convex curve shaped cutting blade portion (12a) crosses the first concave curve (CL2) corresponding to the concave curve shaped cutting blade portion (12b) at a cross point (A). Therefore, the range of the first convex curve (CL1) can be reduced and the first concave curve (CL2) can be enlarged to the outer peripheral side, and the concavity amount (LF) of the first concave curve (CL2) can be increased. As a result, the generated chips are curled appropriately and become easy to break in the first concave curve (CL2) portion of a chip discharge groove (18). Since the chips have relatively short curl shape free of needle-shaped bumps, the chips can be discharged smoothly so that the chip discharge performance can be improved. For the 3-blade drill (10) with the chip discharge groove (18) having relatively small groove width and cross-sectional area, jamming caused by chips can be restrained, and the service life of the tool can be further improved.


Provided are a hard coating for cutting tools and a cutting tool coated with a hard coating, the hard coating having both excellent abrasion resistance and adhesion resistance. A multilayer film in which two or more layers of a first coating layer (24) obtained from Ag and a second coating layer (26) obtained from a nitride, oxide, carbide, carbonitride, or boride of Al_(1-a-b)Cr_(a)M_(b) are alternately layered. The M in the second coating layer (26) comprises at least one kind from among Si, V and W. The atom ratio (a) in the second coating layer (26) is in the range of 0.2 to 0.5 and (b) is greater than 0 to 0.3 or less. The lamination period (d3) for the first coating layer (24) and the second coating layer (26) is in the range of 0.2 nm to 100 nm and the total film thickness (D) is in the range of 0.2 m to 10.0 m. As a result, it is possible to reduce the coefficient of friction and cutting resistance by including Ag in the coating and a coating of excellent lubricity and adhesion resistance as well as high hardness is obtained.


Patent
OSG Corporation | Date: 2015-12-09

Provided is a drill such that a sufficient amount of cutting liquid fed through a cutting liquid feeding hole is ensured without lowering the rigidity of the drill and without increasing the cutting liquid feeding pressure. The cutting liquid feeding hole (22), which is formed within a fluted portion (16), has a fan-shaped cross section which is enclosed by: a forward-side inner wall (FH) located forward relative to the direction of rotation (RT) of the drill (10) and along a radial direction thereof; a rearward-side inner wall (RH) located rearward relative to the direction of rotation (RT) of the drill (10) and along a radial direction thereof and facing the forward-side inner wall (FH) in a circumferential direction; an outer-circumference-side inner wall (OH) which is formed from a partial cylindrical surface centered on the central line (C) of the drill (10); and an inner-circumference-side inner wall (IH) which is formed from a partial cylindrical surface which is centered on the central line (C) of the drill (10) and has a curvature radius (R2) smaller than the curvature radius (R1) of the outer-circumference-side inner wall (OH), said inner-circumference-side inner wall (IH) facing the outer-circumference-side inner wall (OH) in a radial direction. Since the cutting liquid feeding hole (22) has the abovementioned fan-shaped cross section, sufficient web thickness can be ensured while the speed of the cutting liquid inside the cutting liquid feeding hole (22) can be increased without having to increase the cutting liquid feeding pressure, thereby increasing the amount of cutting liquid fed.


Patent
OSG Corporation | Date: 2016-02-03

Provided is a three-bladed drill that obtains, without decreasing drill rigidity, a sufficient supply of cutting fluid through a cutting fluid supply hole even without increasing the cutting fluid supply pressure. A cutting fluid supply hole (22) that is provided in a groove (16) has a fan shape cross-section enclosed by: a front inner wall face (FH) that is located in the radial direction on the side in the forward direction of rotation (RT) of a three-bladed drill (10); a back inner wall face (RH) that faces, in the circumferential direction, the front inner wall face (FH) and that is located in the radial direction on the side in the reverse direction of rotation (RT) of the three-bladed drill (10); an outer circumferential inner wall face (OH) comprising a partial face of a cylinder centered around the center line (C) of the three-bladed drill (10); and an inner circumferential inner wall face (IH) that faces, in the radial direction, the outer circumferential inner wall face (OH), and that comprises a partial face of a cylinder centered around the center line (C) of the three-bladed drill (10) with a radius of curvature (R2) that is smaller than the radius of curvature (R1) of the cylinder for the outer circumferential inner wall face (OH). Therefore, the core diameter can be ensured and the speed of the cutting fluid in the cutting fluid supply hole (22) can be increased even when the supply pressure of the cutting fluid is not increased, thereby increasing the supply of the cutting fluid.


Patent
OSG Corporation | Date: 2015-02-11

There is a provided manufacturing process management support device that has an input means for inputting information indicative of the fact that work related to a manufacturing process is performed, and is capable of increasing the reliability of result information. A handy terminal 10 is used to input relevant information at the start of work for adjusting a machine that processes a processing target, at the completion of such adjustment work, and at the completion of processing work. The results of these inputs are supplied to a support tool execution server 50 through a factory result collection PC 20 and a progress server 30. The support tool execution server 50 calculates the percentage of inputs actually made and causes a display 52 to display the calculated percentage, thereby making it viewable by factory workers.


Patent
OSG Corporation | Date: 2016-04-13

Provided is a thread-cutting tap, which limits chipping that occurs during tapping and with which female thread precision is also stabilized. Chipping is limited by forming a protruding circular shape (32) on the cutting face (30) of a cutting edge (28). Moreover, the thrust load (Fs), which acts on the negative side when the spiral tap (10) bites into the material that is being cut, is reduced and excessive advancement of the spiral tap (10) is also eliminated. Consequently, because spiral tap (10) cutting conditions are favorable, female thread precision is also stabilized.


Patent
OSG Corporation | Date: 2015-04-29

Provided is a thread-forming tap for reducing machining torque and improving tool service life. A thread-forming tap (10) for plastically deforming the surface-layer section of a prepared hole to form a female thread by causing a margin section (18) of a screw thread (16) to bite into the surface-layer section of the prepared hole formed in an object to be machined, the tap being provided with a screw thread (16) formed in the shape of a male thread while a margin part (18) provided protruding in the radial direction and a release part (20) with a diameter less than the margin part (18) are arranged in alternating fashion, wherein the margin part (18) is formed in a udgeline shape with a width dimension of 0 at least at the bottom (30) of the screw thread (16), whereby the contact surface area onto the object being machined can be minimized during machining, machining torque can be reduced, and tool service life can be improved.

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