WO2005023473A1 - 回転切削工具およびこれを用いた切削方法 - Google Patents
回転切削工具およびこれを用いた切削方法 Download PDFInfo
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- WO2005023473A1 WO2005023473A1 PCT/JP2004/011888 JP2004011888W WO2005023473A1 WO 2005023473 A1 WO2005023473 A1 WO 2005023473A1 JP 2004011888 W JP2004011888 W JP 2004011888W WO 2005023473 A1 WO2005023473 A1 WO 2005023473A1
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- cutting
- cutting tool
- angle
- rotary cutting
- rotary
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/26—Making square or polygonal holes in workpieces, e.g. key holes in tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0407—Cutting angles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/49336—Blade making
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1946—Face or end mill
- Y10T407/1948—Face or end mill with cutting edge entirely across end of tool [e.g., router bit, end mill, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1952—Having peripherally spaced teeth
- Y10T407/1962—Specified tooth shape or spacing
- Y10T407/1964—Arcuate cutting edge
- Y10T407/1966—Helical tooth
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/26—Cutters, for shaping comprising cutting edge bonded to tool shank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/28—Miscellaneous
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
- Y10T409/300896—Milling with regulation of operation by templet, card, or other replaceable information supply with sensing of numerical information and regulation without mechanical connection between sensing means and regulated means [i.e., numerical control]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
- Y10T409/30112—Process
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
- Y10T409/302968—Milling with regulation of operation by templet, card, or other replaceable information supply including means for operation without manual intervention
- Y10T409/303136—Milling with regulation of operation by templet, card, or other replaceable information supply including means for operation without manual intervention to make a double curvature foil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/303752—Process
- Y10T409/303808—Process including infeeding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/304424—Means for internal milling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/304536—Milling including means to infeed work to cutter
- Y10T409/305544—Milling including means to infeed work to cutter with work holder
- Y10T409/305656—Milling including means to infeed work to cutter with work holder including means to support work for rotation during operation
- Y10T409/305768—Milling including means to infeed work to cutter with work holder including means to support work for rotation during operation with linear movement of work
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/306664—Milling including means to infeed rotary cutter toward work
- Y10T409/30756—Machining arcuate surface
Definitions
- the present invention relates to a rotary cutting tool such as an end mill used for cutting metal or the like and a cutting method using the same.
- a rotary cutting tool such as an end mill that performs a cutting while rotating about a rotation axis.
- This rotary cutting tool has a cutting edge on a tip portion, a side surface of the tip portion, and the like, and can perform a cutting process by being rotated about a rotation axis.
- Such rotary cutting is used, for example, for processing a die.
- pocket machining is performed on a metal block as a mold material
- rough machining is performed using an end mill having a large diameter in order to reduce machining time.
- four corners are processed using an end mill having a diameter suitable for a desired pocket shape.
- the rotary cutting tool such as the above-described end mill performs cutting while rotating about the rotation axis. For this reason, when a pocket having a predetermined depth is to be formed on a block-shaped metal piece, as in the case of the above-described metal mold, as shown in FIG.
- the size of R corresponds to the diameter of the end mill 50.
- Patent Documents 115 disclose a cutting method using an end mill, there is no disclosure of a cutting method for performing right-angle machining or edge force trimming of a small corner R.
- Patent document 1 Japanese Patent Application Laid-Open No. 2003-53616 (published on February 26, 2003)
- Patent Document 2 JP-A-2000-263308 (published September 26, 2000)
- Patent Document 3 JP-A-2000-5915 (published on January 11, 2000)
- Patent Document 4 JP-A-10-128610 (published May 19, 1998)
- Patent Document 5 Japanese Patent Application Laid-Open No. 6-8026 (published on January 18, 1994)
- An object of the present invention is to provide a rotary cutting tool and a cutting method using the same, which can efficiently perform a right-angle machining or an edge force trimming of a small corner R without repeatedly performing cutting using a small-diameter end mill. To provide.
- the rotary cutting tool according to claim 1 is a rotary cutting tool that performs cutting on an object to be cut by rotating about a rotation axis, and has a cutting edge at a tip portion.
- the angle between the cutting edge and the rotation axis is set to about 35 degrees.
- the angle of the cutting edge with respect to the rotation axis of the rotary cutting tool is specified to be about 35 degrees.
- one of the cutting edges forming the tip angle is set along one surface of the right-angled triangular pyramid, and the cutting is performed by raising the rotary cutting tool in a direction at an angle of 90 degrees with the one surface while maintaining a constant angle.
- a right angle processing between the XY plane and the Z axis can be performed.
- the angle (about 35 degrees) formed by the cutting edge with respect to the rotation axis described above can be derived from the following equation.
- the perpendicular drawn from the apex of the right-angled triangular pyramid to the surface of the workpiece to be the bottom surface is the bottom surface.
- the three triangles formed by these perpendicular lines are similar. For this reason, the length of the perpendicular is 2 if the length of the side divided by 2: 1 is 3.
- the angle required to realize three-dimensional right-angle machining can be calculated by the following equation.
- a rotary cutting tool according to a second aspect is the rotary cutting tool according to the first aspect, wherein a plurality of cutting edges are arranged with respect to the rotary shaft.
- two or more cutting edges are arranged with respect to the cutting force S for performing right-angle machining in three dimensions and the rotation axis of the rotary cutting tool. This makes it possible to reduce cutting resistance and perform more stable cutting than performing cutting with a single cutting edge.
- a rotary cutting tool according to claim 3 is the rotary cutting tool according to claim 1 or 2, and is an end mill.
- the present invention is applicable to an end mill.
- an end mill capable of performing right-angle machining in three dimensions can be provided.
- the cutting method using the rotary cutting tool according to claim 4 is a rotary cutting tool that performs V-groove processing on a workpiece by a cutting blade provided at a tip portion by rotating about a rotation axis. This is the cutting method used.
- cutting and moving are performed until the tip of the rotary cutting tool reaches a predetermined position.
- cutting is performed while pulling up the rotary cutting tool that is inclined at a certain angle in the direction of forming the V-groove from the state where the tip of the rotary cutting tool is at a predetermined position.
- a cutting method for processing a pyramid such as a triangular pyramid and a V-groove as a part of the pyramid are defined.
- the cutting tool is first advanced while cutting the tip of the rotary cutting tool to the position of the top of the triangular pyramid. Then, cutting is performed while keeping the inclination angle of the rotary cutting tool constant while pulling from that position in the direction of each side of the triangular pyramid.
- This makes it possible to perform pyramid machining or V-groove force forming which is a part of a pyramid even with a rotary cutting tool that is usually used for performing circular cutting. Therefore, it is possible to perform three-dimensional right-angled machining and edge machining at a very small corner R without repeatedly performing cutting using a small-diameter rotary cutting tool.
- a cutting method using the rotary cutting tool according to claim 5 is a cutting method using the rotary cutting tool according to claim 4, and in the second step, the cutting method is performed by cutting with the cutting tool. Lift the rotary cutting tool in the direction of the intersection of the two tangents of the circle formed on the surface of the workpiece.
- the lifting direction of the rotary cutting tool when forming a pyramid or a part thereof by cutting is specified. This makes it possible to make V-grooves that gradually become shallower, and this application makes it easier to cut pyramid shapes.
- a cutting method using the rotary cutting tool according to claim 6 is the cutting method using the rotary cutting tool according to claim 4 or 5, wherein the cutting blade attached to a tip of the rotary cutting tool with respect to the rotary shaft. Is about 35 degrees with respect to the rotation axis.
- the angle of the cutting edge with respect to the rotation axis of the rotary cutting tool is specified to be about 35 degrees.
- one cutting edge forming the tip angle is set along one surface of the right-angled triangular pyramid, and cutting is performed by raising the rotary cutting tool in a direction at an angle of 90 degrees with the one surface.
- the above-mentioned pyramids it is possible to realize a right-angle machining in three dimensions. Therefore, it is possible to perform pocket processing having four right-angled corners.
- a perpendicular drawn from the vertex of the right-angled triangular pyramid to the surface of the workpiece to be a bottom surface is an equilateral triangle formed on the surface of the workpiece to be a bottom surface.
- Divide the perpendicular drawn from the vertex of to the opposite side of the equilateral triangle into 2: 1. And the three triangles formed by this perpendicular are similar. For this reason, the length of the perpendicular is 2 if the length of the side divided by 2: 1 is 3. From the above, the angle required to realize three-dimensional right-angle machining can be calculated by the following equation. tan ⁇ / -f 2
- a cutting method using the rotary cutting tool according to claim 7 is a cutting method using the rotary cutting tool according to claim 6, wherein a plurality of cutting blades are arranged with respect to the rotary shaft.
- two or more cutting edges are arranged with respect to the cutting force S for performing right-angle machining in three dimensions and the rotation axis of the rotary cutting tool. This makes it possible to reduce cutting resistance and perform more stable cutting than performing cutting with a single cutting edge.
- a cutting method using the rotary cutting tool according to claim 8 is the cutting method using the rotary cutting tool according to claim 6 or 7, wherein the rotating shaft of the rotary cutting tool is cut in the second step.
- the cutting process is performed in a state where it is inclined at about 55 degrees to the vertical direction of the cutting surface of the object.
- cutting is performed while maintaining the inclination angle at about 55 degrees. This makes it possible to align one of the cutting blades provided at the tip of the rotary cutting tool with one of the three-dimensional surfaces forming a right angle. Therefore, by keeping the inclination angle constant and performing cutting while pulling the rotary cutting tool in a direction perpendicular to one surface, the cutting edge does not interfere with other three-dimensional surfaces while using the rotary cutting tool. Right angle processing in the dimensional direction can be realized.
- a cutting method using the rotary cutting tool of the present invention can be applied to an end mill. This makes it possible to provide an end mill capable of performing pyramid processing, particularly, right-angle processing in three dimensions.
- a cutting method using a rotary cutting tool according to claim 10 uses a rotary cutting tool that performs a process on a workpiece by a cutting blade provided at a tip portion by rotating about a rotation axis.
- a cutting method including a first step and a second step. The work has three planes that intersect perpendicularly with each other.
- a rotary cutting tool with an angle of about 35 degrees to the rotation axis of the cutting edge attached to the tip was set up perpendicular to the first of the three planes of the workpiece.
- Second stage The top performs cutting while moving the rotary cutting tool at an angle of 45 degrees with respect to one side forming a corner on the first surface of the rectangular parallelepiped.
- a rotary cutting tool having an angle of the cutting edge with respect to the rotation axis of about 35 degrees is set upright with respect to the first of three planes perpendicular to each other on the workpiece, By moving the first plane at an angle of 45 degrees with respect to one side forming the corner, an equilateral triangle can be formed evenly with respect to the above three planes.
- the intersection between the second surface other than the first surface and the first surface of the three planes is set at an angle of 45 degrees.
- the corners resulting from chamfering at 45 ° can be chamfered at 45 ° by the same cutting method as in the case of forming the equilateral triangle. For this reason, when chamfering the above-mentioned corners manually by a craftsman, or by adjusting the rotation axis of a rotary cutting tool with a cutting edge angle of 45 degrees to the chamfering angle of the above-mentioned corners, chamfering is performed. Compared to the case where it is performed, highly precise and chamfering can be performed very efficiently.
- FIG. 1 is a side view showing an end mill according to one embodiment of the present invention.
- FIG. 2 is a view for explaining a pyramidal kamen method using the end mill of FIG. 1.
- FIG. 3 is a schematic diagram showing a cutting method using the end mill of FIG. 1.
- FIG. 4 (a) One (e) is a diagram showing the workpiece to be three-dimensionally machined by the cutting method in Fig. 2.
- FIG. 5 (a) and (b) are diagrams showing an example of a workpiece to be machined by the cutting method of the present invention.
- FIG. 6 is a view showing an example of a workpiece to be machined by a conventional cutting method.
- FIGS. 7 (a) and 7 (b) are views showing another example of the workpiece to be machined by the cutting method of the present invention.
- An end mill (rotary cutting tool) 10 is a tool for cutting a metal block such as a mold, and is used by being set on a machine tool such as a milling machine.
- the end mill 10 has two cutting blades 11a and l ib at the tip.
- the cutting edges 11a and 11b are respectively arranged symmetrically with respect to the rotation axis at an angle of 35.26 degrees with respect to the rotation axis. For this reason, the tip angle D1 formed by the two cutting edges 11a and lib is 70.53 degrees as shown in FIG.
- the tip angle D1 is a numerical value calculated to realize three-dimensional right-angle machining using a rotary cutting tool such as the end mill 10.
- FIGS. 2 (a) and 2 (b) show a tip angle D1 of the end mill 10 as follows.
- Fig. 2 (a) shows a top view of a workpiece that has been pocketed into a right-angled triangular pyramid shape that is cut by this cutting method
- Fig. 2 (b) shows a pocketed work that has been pocketed into the right-angled triangular pyramid shape.
- FIG. 2 shows a cross-sectional view of a cut work piece.
- the tip angle D1 of the end mill 10, which is a rotary cutting tool is twice the angle H, and can be calculated by the following equation.
- cutting is performed in a state where the rotation axis of the end miner 10 is inclined at an inclination angle D2 from the X axis, the ⁇ axis, and the ⁇ axis, respectively.
- the inclination angle D2 is 54.74 degrees. This is an angle determined according to the tip angle D1 of the end mill 10.
- the tip angle D1 of the end mill 1 is about 71 degrees as described above.
- the two cutting blades 11a and 1 lb are arranged so that the angle ⁇ formed by the cutting blades l la and l ib with respect to the rotation axis is about 35 degrees. Therefore, when cutting a predetermined surface of the work with the cutting blades 11a and l ib, the angle formed between the rotation axis and the predetermined surface of the work is the rotation of the cutting blade 1 la and l ib. It must match the angle ⁇ (35 ⁇ 26 degrees) to the axis. Here, if this angle ⁇ (35.26 degrees) is replaced with the angle between the rotation axis and the direction perpendicular to the surface of the workpiece, the angle is 54.74 degrees by the following equation.
- the inclination angle D2 (approximately At 55 °)
- the end mill 10 is rotated with the rotation axis tilted. Then, by machining while pulling the end mill 10 in each axial direction shown in FIG. 3, pocket machining of a right-angled triangular pyramid, that is, orthogonal machining in three dimensions can be realized.
- the cutting method force S that applies this right triangular pyramid cutting is shown in Fig. 4 (a) and Fig. 4 (e).
- pocket machining is first performed on the workpiece 20a as shown in FIG. 4 (a).
- Roughing is performed using an end mill with a diameter capable of cutting the maximum area of the square.
- a right-angled machining of one corner forming a quadrangle for pocket machining is performed on the workpiece 20b.
- the angles of the cutting edges l la and l ib of the end minole 10 correspond to the planes (XY plane, YZ plane, and ZX plane in Fig. 3) forming a three-dimensional right angle.
- the end mill 10 is cut to a position where the tip of the end mill becomes a right-angled vertex in the three-dimensional pocket machining.
- this right-angled triangular pyramid is formed in the other three corners of the workpiece 20c-20e by the same cutting process.
- a rotary cutting tool such as the end mill 10
- three-dimensional right-angle machining can be performed, and pocket machining with a rectangular cross-sectional shape can be performed.
- a square hole is formed in an old coin shape in which a square hole is formed at the center of the disk shown in FIG.
- Pocket processing can be easily cut.
- processing to leave a cross shape in plan view as shown in Fig. 7 (a), or a 1/4 part of a circular cylinder as shown in Fig. 7 (b) It is also possible to perform such processing.
- the rotation axis of the end mill 10 is set with respect to the workpiece 30a having a three-dimensional plane that intersects perpendicularly.
- the object to be cut 30a is moved perpendicularly to the upper surface (first surface) at an angle of incidence of 45 degrees with respect to one side constituting the angle of the three-dimensional plane.
- the force S can be obtained to obtain the workpiece 30b in which three equilateral triangular faces are formed on three planes.
- cutting is performed by a predetermined method using the end mill 10.
- the part D shown in Fig. 9 (a) is obtained by chamfering the intersection between the upper surface and the side surface at a 45 degree chamfer angle in the three-dimensional plane (upper surface, side surface, front surface) constituting the workpiece 40a. The intersection of the fourth surface and the front surface is shown.
- the chamfering of the D part in the workpiece 40a can be performed only by moving the rotary cutting tool with a cutting edge angle of 45 ° while standing upright, so that the chamfering angle is 4 5 I can't do it. For this reason, finishing work was performed manually by a craftsman, or a rotary cutting tool such as an end mill with a 45-degree cutting edge was adjusted again according to the angle of chamfering before machining.
- a rotary cutting tool such as an end mill with a 45-degree cutting edge was adjusted again according to the angle of chamfering before machining.
- the dimensional accuracy tends to vary by manual work by craftsmen.
- the rotary cutting tool is adjusted to a predetermined angle, it is inefficient because the setting takes a long time, even though the portion to be machined is small and the number is small.
- the end mill 10 having a tip angle of about 71 degrees as described above is used to cut the workpiece 40a having the shape shown in FIG.
- the end mill 10 is moved in the same direction as the traveling direction while standing vertically to the upper surface (first surface) of the workpiece 40a.
- the upper surface, the side surface, and the front surface of the workpiece 40a can be uniformly processed, so that the fourth surface and the front surface formed by uniformly chamfering the intersection between the upper surface and the side surface are formed.
- the chamfering process in the D section, which is the intersection of, can be performed at a 45 ° chamfer angle. Therefore, it is possible to perform chamfering on the D portion shown in FIG. 9 (a) as shown by the hatched portion in FIG. 9 (b). Compared to the case where the angle adjustment for chamfering is performed and the force is adjusted, it is possible to obtain the workpiece 40b having a shorter processing time and higher dimensional accuracy.
- the corner of the cutting edge l la ′ are arranged so that each degree ⁇ is about 35 degrees with respect to the rotation axis.
- the tip angle D1 formed by the two cutting edges l la and l lb is about 71 degrees, which is twice the angle ⁇ .
- the cutting edge 11a or 1 lb coincides with one surface of the right-angled triangular pyramid, and the vertex of the right-angled triangular pyramid (FIG. Cutting until the tip of the cutting edge 11a, lib coincides with the point (the origin of the graph in Fig. 7). Then, cutting is performed so as to raise the end mill 10 in each of the X-axis direction, the Y-axis direction, and the Z-axis direction while maintaining a certain angle.
- the end mill 10 of the present embodiment has two cutting blades 11a and lib arranged symmetrically with respect to a rotation axis at a tip portion.
- a position to be a vertex of the triangular pyramid is determined, and cutting is performed until the tip of the end mill 10 comes to that position.
- cutting is performed while maintaining a constant inclination angle while pulling the end mill 10 in each direction of the three sides extending from the apex of the triangular pyramid from that state.
- cutting may be performed while pulling the end mill 10 in the X-axis, Y-axis, and Z-axis directions with the vertex of the triangular pyramid as the origin.
- cutting is performed in each direction while maintaining the rotation axis of the end mill 10 at an inclination angle D2 (about 55 degrees) with respect to a direction perpendicular to the surface of the workpiece 20. Processing.
- the angle ⁇ formed by the cutting edges 11a and lib with respect to the rotation axis is about 35 degrees as described above, by performing the cutting while maintaining the inclination angle D2, the cutting edges 11a and lib can be formed. Cutting can be performed in a state where the cutting surface is matched.
- a triangular pyramid-shaped pocket machining by making the angles of the cutting edges 11a and lib coincide with the XY plane, and performing the cutting while advancing the end mill 10 in the Z-axis direction, A right angle between the XY plane and the Z axis is formed.
- the end minole 10 having the angle of the cutting edge with respect to the rotation axis of about 35 degrees is rotated with respect to the upper surface of the workpiece 30a shown in FIG. With the axis of rotation kept vertical, move it at an angle of 45 degrees to one side of the upper surface.
- the force S can be used to chamfer the right angle of the D part of the workpiece 40a shown in Fig. 9 (a) at an angle of 45 degrees as shown by the oblique lines in Fig. 9 (b). .
- the 45-degree chamfering of the D portion shown in FIG. 9A can be efficiently performed without performing the troublesome setting for adjusting the angle of the end mill 10.
- the processing can be performed without variation in accuracy.
- angle ⁇ when a three-dimensional right angle is obtained by cutting using a rotary cutting tool such as an end mill, it is necessary to have an angle ⁇ of about 35 degrees as described above.
- the angle ⁇ may not be about 35 degrees as described above.
- the tip angle D1 and the inclination angle D2 are not limited to about 71 degrees and about 55 degrees as long as the processing is not a three-dimensional right-angle processing but a simple pyramid processing.
- the end mill 10 has been described as an example of the rotary cutting tool to which the present invention is applied.
- the present invention is not limited to this.
- the present invention can be applied to other rotary cutting tools such as a drill.
- the end mills 10 it is applicable to various end mills such as a tapered end mill.
- the present invention is applicable to right-angle machining in a three-dimensional direction when performing pocket machining using a rotary cutting tool on a molding die or a metal part.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/570,327 US7306412B2 (en) | 2003-09-05 | 2004-08-19 | Rotary milling cutter and milling method using the same technical field |
EP04771849A EP1661651A4 (en) | 2003-09-05 | 2004-08-19 | ROTARY CUTTING TOOL AND METHOD OF USE |
JP2005513617A JP4608433B2 (ja) | 2003-09-05 | 2004-08-19 | 回転切削工具およびこれを用いた切削方法 |
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JP2003-314356 | 2003-09-05 | ||
JP2003314356 | 2003-09-05 |
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WO2005023473A1 true WO2005023473A1 (ja) | 2005-03-17 |
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PCT/JP2004/011888 WO2005023473A1 (ja) | 2003-09-05 | 2004-08-19 | 回転切削工具およびこれを用いた切削方法 |
Country Status (4)
Country | Link |
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US (1) | US7306412B2 (ja) |
EP (1) | EP1661651A4 (ja) |
JP (1) | JP4608433B2 (ja) |
WO (1) | WO2005023473A1 (ja) |
Cited By (3)
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US20080044247A1 (en) * | 2006-02-10 | 2008-02-21 | Gershon Harif | Attachment particularly useful for milling machines to enable cutting sharp interior corners and a cutter member for use therein |
KR101945285B1 (ko) | 2010-12-17 | 2019-02-07 | 구스타프 클라우케 지엠비에이치 | 피가공재 내에 개구의 밀링 방법, 및 개구를 갖는 피가공재 |
JP2020510858A (ja) * | 2017-02-14 | 2020-04-09 | スリーエム イノベイティブ プロパティズ カンパニー | エンドミル加工によって製造された微細構造の群を備えるセキュリティ物品 |
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US8529172B2 (en) * | 2008-06-20 | 2013-09-10 | John R. Buta | Edge milling device |
US8449229B2 (en) * | 2010-06-30 | 2013-05-28 | Eastman Kodak Company | Fabrication on of an alternate scavenger geometry |
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JP6457394B2 (ja) * | 2013-11-01 | 2019-01-23 | 兼房株式会社 | 回転切削工具による被加工材表面の加工方法 |
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CN107335847B (zh) * | 2017-06-21 | 2019-01-29 | 华中科技大学 | 一种切削效能约束刀具姿态的加工方法 |
USD863386S1 (en) | 2018-06-06 | 2019-10-15 | Kennametal Inc. | Ribbed cutting insert |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080044247A1 (en) * | 2006-02-10 | 2008-02-21 | Gershon Harif | Attachment particularly useful for milling machines to enable cutting sharp interior corners and a cutter member for use therein |
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KR101945285B1 (ko) | 2010-12-17 | 2019-02-07 | 구스타프 클라우케 지엠비에이치 | 피가공재 내에 개구의 밀링 방법, 및 개구를 갖는 피가공재 |
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Also Published As
Publication number | Publication date |
---|---|
EP1661651A4 (en) | 2008-09-24 |
US20070014644A1 (en) | 2007-01-18 |
US7306412B2 (en) | 2007-12-11 |
JP4608433B2 (ja) | 2011-01-12 |
EP1661651A1 (en) | 2006-05-31 |
JPWO2005023473A1 (ja) | 2007-11-01 |
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