Processing method, jig, and three-axis machining center for inclined surface processing

Abstract

To enable processing on an inclined surface inclined with respect to a reference surface by using a three-axis machining center.SOLUTION: In a processing method, a member 5 to be processed is processed using a three-axis machining center 1 to form a finished article 6 having a reference surface 61 and an inclined surface 62 inclined with respect to the reference surface 61. The processing method includes the steps of: installing a jig 2 having a placement surface 32 on which the member 5 to be processed is placed, in a table surface 121 of the three-axis machining center 1; placing a surface opposite to the reference surface 61 in a thickness direction of the member 5 to be processed with respect to the placement surface 32 to make the reference surface 61 inclined with respect to the table surface 121; and cutting the member 5 to be processed by a cutting tool 13 of the three-axis machining center 1 to form the inclined surface 62.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a processing method, a jig, and a three-axis machining center for inclined surface processing, and more particularly to a processing method, a jig, and a three-axis machining center for inclined surface processing for forming a processed product having an inclined surface that is inclined relative to a reference plane. [Background technology]

[0002] Patent Document 1 describes a five-axis machining center. The five-axis machining center described in Patent Document 1 is a five-axis controlled vertical machining center with three linear axes (X, Y, and Z axes) and two rotary axes. The five-axis machining center is equipped with a workpiece holding unit that holds a workpiece.

[0003] The workpiece holding unit has a tilt table that can rotate around a horizontal axis. By rotating the tilt table at any angle, the workpiece holding unit can tilt the workpiece in any direction.

[0004] This means that, for example, even when forming a surface (inclined surface) on a workpiece that is inclined relative to a reference plane, the inclined surface can be machined using a tool that moves along three linear axes by rotating the tilt table. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-062973 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the tilt table of a 5-axis machining center cannot adjust to small angles (for example, in 1 / 100° increments), which poses a problem in that, for example, it is not possible to form an inclined surface on the workpiece that is inclined at a small angle relative to a reference plane.

[0007] Furthermore, in general, the maximum rotation speed of cutting tools on 5-axis machining centers is lower than that on 3-axis machining centers, which means that the tools are more likely to break.

[0008] The present invention has been made in consideration of the above circumstances, and aims to provide a machining method, a jig, and a three-axis machining center for machining inclined surfaces that can machine inclined surfaces that are inclined relative to a reference plane using a three-axis machining center. [Means for solving the problem]

[0009] One embodiment of the processing method according to the present invention is a processing method for processing a workpiece using a three-axis machining center to form a processed product having a reference surface and an inclined surface inclined relative to the reference surface, and includes the steps of: placing a jig having a mounting surface on which the workpiece is placed on a table surface of the three-axis machining center; placing the surface of the workpiece opposite the reference surface in the thickness direction on the mounting surface and inclining the reference surface relative to the table surface; and cutting the workpiece with a cutting tool of the three-axis machining center to form the inclined surface.

[0010] A jig according to one aspect of the present invention is a jig used when machining a workpiece using a three-axis machining center, and includes a table opposing surface that faces a table surface of the three-axis machining center, a mounting surface that is provided on the opposite side of the table opposing surface and on which the workpiece is placed, and The placement surface is inclined with respect to the table opposing surface.

[0011] One embodiment of the three-axis machining center for inclined surface processing according to the present invention comprises a three-axis machining center having a bed, a table surface that moves relative to the bed, and a cutting tool that processes a workpiece on the table surface, and a jig that is installed on the table surface and has a mounting surface on which the workpiece is placed, the mounting surface being inclined relative to the table surface. [Effects of the Invention]

[0012] The machining method, jig, and three-axis machining center for machining inclined surfaces according to the above aspects of the present invention have the advantage that an inclined surface that is inclined relative to a reference plane can be machined using a three-axis machining center. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is an explanatory diagram for explaining an outline of the processing method of the present invention, in which (A) is a schematic perspective view of a processed member, and (B) is a schematic perspective view of a processed product. [Figure 2] FIG. 2 is a schematic perspective view of a three-axis machining center. [Figure 3] Fig. 3(A) is a schematic cross-sectional view of a jig placed on a table. Fig. 3(B) is a schematic cross-sectional view of a workpiece placed on the jig. Fig. 3(C) is a schematic cross-sectional view of the workpiece on the jig after being machined with a cutting tool. [Figure 4] 4A and 4B are schematic cross-sectional and plan views of a processed product according to an embodiment of the present invention. [Figure 5] FIG. 5 is a schematic perspective view of a first jig according to the embodiment. [Figure 6] FIG. 6 is a schematic cross-sectional view of a state in which a jig is placed on a table surface in the embodiment. [Figure 7] 7A and 7B are schematic cross-sectional views for explaining the preparation step according to the embodiment. [Figure 8] FIG. 8 is a schematic cross-sectional view when processing the fifth inclined surface of the processed product according to the embodiment. [Figure 9]FIG. 9 is a schematic cross-sectional view when machining the eighth inclined surface of the machined product according to the embodiment. [Figure 10] FIG. 10 is a schematic cross-sectional view when the sixth inclined surface of the processed product according to the embodiment is processed. [Figure 11] FIG. 11 is a schematic cross-sectional view when the seventh inclined surface of the processed product according to the embodiment is processed. [Figure 12] FIG. 12 is a schematic cross-sectional view when a first inclined surface of a processed product according to the embodiment is processed. [Figure 13] FIG. 13 is a schematic cross-sectional view when the fourth inclined surface of the processed product according to the embodiment is processed. [Figure 14] FIG. 14 is a schematic cross-sectional view when the second inclined surface of the processed product according to the embodiment is processed. [Figure 15] FIG. 15 is a schematic cross-sectional view when the third inclined surface of the processed product according to the embodiment is processed. [Figure 16] FIG. 16 is a schematic perspective view for explaining a method for processing a jig according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] 〔overview〕 The machining method according to the embodiment is a method of machining a workpiece 5 (see FIG. 1(A)) using a three-axis machining center 1 to form a machined product 6 (see FIG. 1(B)). A vertical machining center or a gantry machining center can be used as the three-axis machining center 1, but in this embodiment, a vertical machining center is used. As shown in FIG. 2, the three-axis machining center 1 has a bed 11, a table 12, and a cutting tool 13.

[0015] The bed 11 supports the table 12. The bed 11 has a drive mechanism for moving the table 12. The bed 11 can move the table 12 in a direction along a horizontal plane (at least one of the X and Y directions). A workpiece 5 can be placed on the upper surface of the table 12 (hereinafter referred to as the table surface 121). The table surface 121 is a horizontal plane and does not move. The cutting tool 13 can move in a direction perpendicular to the table surface 121 (the Z direction). This allows the three-axis machining center 1 to cut a workpiece fixed on the table surface 121 by moving the cutting tool 13 appropriately in the X, Y, and Z directions, thereby forming a processed product 6.

[0016] As shown in FIG. 1(B), a processed product 6 formed by the processing method according to this embodiment has at least two surfaces: a reference surface 61 and an inclined surface 62 inclined relative to the reference surface 61. The reference surface 61 included in the processed product 6 is formed in advance in a workpiece 5. To form this processed product 6, a workpiece 5 as shown in FIG. 1(A) is machined using a three-axis machining center 1 and a jig 2. In this specification, a processing device equipped with the three-axis machining center 1 and the jig 2 may be referred to as a "three-axis machining center 10 for processing inclined surfaces."

[0017] As shown in FIG. 3, the processing method includes a jig setting step of setting the jig 2 on a table surface 121, a workpiece setting step of setting the workpiece 5 on the jig 2, and a cutting step of processing the workpiece 5. In the jig setting step, the jig 2 is set on the table surface 121 as shown in FIG. 3(A), so that the surface on which the workpiece 5 is placed (mounting surface 32) is inclined. In the workpiece setting step, when the workpiece 5 is placed on the mounting surface 32, a reference surface 61 of the workpiece 5 is inclined with respect to the table surface 121 as shown in FIG. 3(B). In the cutting step, as shown in FIG. 3(C), the cutting tool 13 cuts the workpiece 5 placed on the mounting surface 32 of the jig 2 while moving it along a plane parallel to the table surface 121. As a result, an inclined surface 62 inclined with respect to the reference surface 61 is formed in the workpiece 6.

[0018] As a result, even if the angle between the reference surface 61 and the inclined surface 62 in the workpiece 6 is minute, the workpiece 6 can be machined with high precision using the three-axis machining center 1.

[0019] 〔detail〕 Each element used in the processing method according to this embodiment will be described in detail below, but the processed product 6, workpiece 5, and jig 2 described below are merely examples.

[0020] In this specification, "parallel" refers not only to cases where two lines, sides, surfaces, etc. do not intersect even when extended, but also to cases where the angle between the two lines, sides, surfaces, etc. is within a range of 10°. Furthermore, "perpendicular" refers to cases where the angle between the two lines, sides, surfaces, etc. is within a range of 90°±10°.

[0021] (Processed product 6) As shown in FIG. 4(A), the processed workpiece 6 according to this embodiment has two reference surfaces 61 (a first reference surface 611 and a second reference surface 612) and eight inclined surfaces 62 inclined relative to the reference surfaces 61. The two reference surfaces 61 are surfaces located at different positions from each other. The eight inclined surfaces 62 included in the processed workpiece 6 are defined as a first inclined surface 621, a second inclined surface 622, a third inclined surface 623, a fourth inclined surface 624, a fifth inclined surface 625, a sixth inclined surface 626, a seventh inclined surface 627, and an eighth inclined surface 628, as shown in FIG. 4(A). The first reference surface 611, the first inclined surface 621, the second inclined surface 622, the third inclined surface 623, and the fourth inclined surface 624 form one surface in the thickness direction of the processed product 6 (hereinafter referred to as the back surface), and the second reference surface 612, the fifth inclined surface 625, the sixth inclined surface 626, the seventh inclined surface 627, and the eighth inclined surface 628 form the other surface in the thickness direction of the processed product 6 (hereinafter referred to as the front surface). Note that in the processed product 6 of this embodiment, the angle between adjacent surfaces is within a range of 180°±1°, and in reality, the product appears to be almost flat, but for ease of explanation, the angle is exaggerated in the drawings.

[0022] In this embodiment, the reference surface 61 is a flat surface, but it does not necessarily have to be a flat surface. The reference surface 61 is preferably formed on the workpiece 5 before machining using the jig 2. The reference surface 61 may be formed by the three-axis machining center 1 before machining using the jig 2, or may be the surface of the base material of the workpiece 5.

[0023] 4(B), a plurality of through holes 63 are formed in each inclined surface 62. Further, grooves 64 are formed in the fifth inclined surface 625, the sixth inclined surface 626, the seventh inclined surface 627, and the eighth inclined surface 628, extending in the longitudinal direction in a plan view.

[0024] (Jig 2) The machining method according to this embodiment uses a three-axis machining center 1 as well as a plurality of jigs 2. The plurality of jigs 2 includes a first jig 3 and a second jig 4 (FIG. 10).

[0025] The first jig 3 is a jig used when forming the first inclined surface 621, the fourth inclined surface 624, the fifth inclined surface 625, and the eighth inclined surface 628. As shown in FIG. 6 , the first jig 3 includes a table opposing surface 31 that faces the table surface 121, and a mounting surface 32 on which the workpiece 5 is placed. The table opposing surface 31 is a horizontal plane and is placed on the table surface 121. In this embodiment, the table opposing surface 31 is the bottom surface of the jig 2. The mounting surface 32 is the surface on the opposite side to the table opposing surface 31 in the thickness direction, and is included in the top surface of the jig 2 in this embodiment.

[0026] The mounting surface 32 is preferably a flat surface inclined with respect to the table opposing surface 31. In the first jig 3, the angle formed between the mounting surface 32 and the table opposing surface 31 is a predetermined angle (hereinafter referred to as the first angle). There are no particular restrictions on the first angle, but it is preferably 1.00° or less, and more preferably 0.90° or less. The first angle is greater than 0°. The first angle according to this embodiment is 0.54°. The dimensional tolerance of the first angle is preferably ±0.01°.

[0027] The first jig 3 is preferably divided into multiple pieces, as shown in Fig. 5. The first jig 3 includes a pair of outer jigs 33 that support both widthwise ends of the workpiece 5, and multiple inner jigs 34 that are arranged between the pair of outer jigs 33. The pair of outer jigs 33 and the multiple inner jigs 34 are fixed to the table surface 121 at regular intervals in the widthwise direction by fasteners such as bolts.

[0028] The outer jig 33 is placed on the widthwise edge of the workpiece 5. The outer jig 33 has a plurality of mounting holes (hereinafter referred to as outer jig mounting holes 331) formed along the center in the widthwise direction. The plurality of outer jig mounting holes 331 are formed at regular intervals in the lengthwise direction. The outer jig mounting holes 331 penetrate the outer jig 33 in the thickness direction. A fixing tool to be fixed to the table surface 121 is passed through the outer jig mounting holes 331. The outer jig 33 can be fixed to the table surface 121 by the fixing tool.

[0029] The inner jig 34 is placed at the center of the width of the workpiece 5. The inner jig 34 is installed appropriately depending on the distance between the outer jigs 33. The inner jig 34 has a pair of mounting holes (hereinafter referred to as inner jig mounting holes 341) formed at both ends in the length direction. The inner jig mounting holes 341 penetrate the inner jig 34 in the thickness direction. A fixture that is fixed to the table surface 121 is passed through the inner jig mounting hole 341. The inner jig 34 can be fixed to the table surface 121 by the fixture.

[0030] The outer jig 33 and the inner jig 34 preferably have positioning portions 35. As shown in Fig. 6, the positioning portions 35 protrude above the mounting surface 32. The positioning portions 35 have upright surfaces 351 that intersect with the mounting surface 32. The upright surfaces 351 of the positioning portions 35 of the outer jig 33 and the inner jig 34 are all located on the same plane. The position of the workpiece 5 is determined when the end face of the workpiece 5 comes into contact with the upright surfaces 351 of the positioning portions 35.

[0031] 5, the outer jig 33 and the inner jig 34 preferably have a plurality of clamping tool mounting holes 36 formed therein. Clamping tools (not shown) that hold down the edge portions of the workpiece 5 are screwed into the clamping tool mounting holes 36. The workpiece 5 positioned in the positioning portion 35 is pressed down by the clamping tools, and is thereby fixed onto the jig 2.

[0032] The mounting surface 32 of the first jig 3 is preferably flat. This allows the contact area to be as large as possible when the lower surface of the workpiece 5 is flat. However, the mounting surface 32 may be composed of two surfaces of different heights, as long as the reference surface 61 of the workpiece 5 is inclined when the workpiece 5 is placed on it. Furthermore, if the workpiece 5 has a protruding portion that protrudes from other portions, the mounting surface 32 may be partially recessed to avoid interference with the protruding portion. In other words, the mounting surface 32 may be formed in a shape that matches the shape of the workpiece 5.

[0033] The material of the first jig 3 is not particularly limited, and examples thereof include metal, synthetic resin, and carbon.

[0034] Next, the second jig 4 will be described. The second jig 4 has almost the same structure as the first jig 3, so drawings thereof will be omitted and the description will be made using a schematic diagram of the first jig 3. The second jig 4 is a jig 2 used when forming the second inclined surface 622, the third inclined surface 623, the sixth inclined surface 626, and the seventh inclined surface 627. Like the first jig 3, the second jig 4 includes a table-opposing surface 31, a mounting surface 32, and a positioning portion 35. In this embodiment, the second jig 4 differs from the first jig 3 only in the angle of the mounting surface 32 relative to the table-opposing surface 31, and therefore a duplicated description will be omitted.

[0035] In the second jig 4, the angle formed between the mounting surface 32 and the table-opposing surface 31 is a predetermined angle (hereinafter referred to as the second angle). The second angle is an angle different from the first angle. There are no particular restrictions on the second angle as long as it is an angle different from the first angle, but it is preferably 1.00° or less, and more preferably 0.90° or less. The second angle is greater than 0°. The second angle according to this embodiment is 0.18°. The dimensional tolerance of the second angle is preferably ±0.01°.

[0036] A jig 2 having such a configuration is produced, for example, by the method shown in Fig. 16. The material before machining of the jig 2 is placed on the table surface 121 so that the surfaces that will become the table opposing surface 31 and the mounting surface 32 are perpendicular to the table surface 121. In this state, the material is machined with the cutting tool 13 using the three-axis machining center 1. At this time, the cutting tool 13 can machine the mounting surface 32 by moving along a plane (XY plane) parallel to the table surface 121, so that even if the angle of the mounting surface 32 with respect to the table opposing surface 31 is very small, machining can be performed with high precision.

[0037] [Processing method] Next, a description will be given of a processing method for forming a processed product 6 having a reference surface 61 and an inclined surface 62 using a three-axis machining center 1 and a jig 2. The processing method includes a preparation step, a front surface processing step, and a back surface processing step, which are performed in this order. Note that the front surface processing step may be performed after the back surface processing step.

[0038] (Preparation step) The preparation step is a step of forming a reference surface 61 on the workpiece 5. In the preparation step, as shown in FIGS. 7(A) and 7(B), the base material of the workpiece 5 is fixed to the table surface 121, and a second reference surface 612 is formed by cutting using a three-axis machining center 1 without using a jig 2. Next, the workpiece 5 on the table surface 121 is fixed so that the second reference surface 612 faces the table surface 121, and a first reference surface 611 is formed by cutting without using a jig 2. Note that if the surface of the base material of the workpiece 5 is used as the reference surface 61, the preparation step may be omitted. Also, in the preparation step, the second reference surface 612 may be formed after the first reference surface 611 is formed.

[0039] (Surface processing step) Next, a surface processing step is performed. In the surface processing step, processing is performed in the order of the fifth inclined surface 625, the eighth inclined surface 628, the sixth inclined surface 626, and the seventh inclined surface 627. In the processing method of this embodiment, in the step of processing each inclined surface 62, a jig installation step, a workpiece setting step, and a cutting step are performed in that order.

[0040] When machining fifth inclined surface 625, in the jig installation step, jig 2 is installed on table surface 121. At this time, a first jig 3 corresponding to machining fifth inclined surface 625 is installed on table surface 121 as jig 2.

[0041] After this, a workpiece setting step is executed. In the workpiece setting step, a workpiece 5 is set on the placement surface 32 of the jig 2 installed on the table surface 121. When processing the fifth inclined surface, as shown in FIG. 8, at least a part of the surface of the workpiece 5 opposite to the second reference surface 612 in the thickness direction (here, the first reference surface 611) is placed on the placement surface 32 of the jig 2. Then, the second reference surface 612 is inclined with respect to the table surface 121.

[0042] After this, the cutting step is performed. In the cutting step, the workpiece 5 is cut by the cutting tool 13 of the three-axis machining center 1 to form the inclined surface 62. As shown in Fig. 8, in the cutting step, the cutting tool 13 is moved along a plane parallel to the table surface (XY plane), thereby forming the fifth inclined surface 625 inclined with respect to the second reference surface 612. As a result of this processing, the angle α1 between the second reference surface 612 and the fifth inclined surface 625 becomes α1 = 180 - 0.54 = 179.46°.

[0043] In the cutting step of machining the fifth inclined surface 625, it is preferable to form a groove 64 located within the area of ​​the fifth inclined surface 625.

[0044] 9, eighth inclined surface 628 is formed. In order to process eighth inclined surface 628, the same steps (jig setting step, workpiece setting step, and cutting step) as those used to process fifth inclined surface 625 are performed. However, in the jig setting step for processing eighth inclined surface 628, the same jig (first jig 3) as that used for fifth inclined surface 625 is used, so the installation work can be omitted.

[0045] 9, the back surface (first reference surface 611) of the workpiece 5 is placed on the placement surface 32 of the first jig 3, and the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface, thereby forming an eighth inclined surface 628 that is inclined with respect to the second reference surface 612. As a result of this processing, the angle α2 formed between the second reference surface 612 and the eighth inclined surface 628 becomes α2 = 179.46°.

[0046] In the cutting step for machining the eighth inclined surface 628, it is preferable to form a groove 64 located within the region of the eighth inclined surface 628.

[0047] 10, the sixth inclined surface 626 is formed. In order to process the sixth inclined surface 626, the same steps as those used to process the fifth inclined surface 625 (a jig setting step, a workpiece setting step, and a cutting step) are carried out.

[0048] In the jig setting step, the jig 2 is set on the table surface 121. At this time, the second jig 4 corresponding to the processing of the sixth inclined surface 626 is set on the table surface 121 as shown in FIG.

[0049] Thereafter, the back surface (first reference surface 611) of the workpiece 5 is placed on the placement surface 32 of the second jig 4, and the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface, thereby forming a sixth inclined surface 626 that is inclined with respect to the second reference surface 612. As a result of this processing, the angle α3 formed between the second reference surface 612 and the fifth inclined surface 625 becomes α3 = 180.36°.

[0050] In the cutting step of machining the sixth inclined surface 626, it is preferable to form a groove 64 located within the region of the sixth inclined surface 626.

[0051] 11, seventh inclined surface 627 is formed. In order to process seventh inclined surface 627, the same steps (jig setting step, workpiece setting step, and cutting step) as those used to process fifth inclined surface 625 are performed. However, in the jig setting step for processing seventh inclined surface 627, the same jig (second jig 4) as that used for sixth inclined surface 626 is used, so the installation work can be omitted.

[0052] 11, the back surface (first reference surface 611) of the workpiece 5 is placed on the mounting surface 32 of the second jig 4, the second reference surface 612 is inclined, and then the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface, thereby forming a seventh inclined surface 627 inclined with respect to the second reference surface 612. As a result of this processing, the angle α4 formed between the seventh inclined surface 627 and the eighth inclined surface 628 becomes α4 = 180.36°.

[0053] In the cutting step of machining the seventh inclined surface 627, it is preferable to form grooves 64 located within the area of ​​the seventh inclined surface 627. As a result, the grooves 64 formed in the fifth inclined surface 625, the eighth inclined surface 628, the sixth inclined surface 626, and the seventh inclined surface 627 are continuous in the length direction of the workpiece 5 in a plan view.

[0054] (Back processing step) Next, a rear surface processing step is performed. In the rear surface processing step, processing is performed in the order of first inclined surface 621, fourth inclined surface 624, second inclined surface 622, and third inclined surface 623. In the rear surface processing step, similar to the front surface processing step, in the step of processing each inclined surface 62, a jig setting step, a workpiece setting step, and a cutting step are performed in that order.

[0055] When machining the first inclined surface 621, in the jig setting step, a jig 2 is set on the table surface 121. At this time, a first jig 3 corresponding to the machining of the first inclined surface 621 is set on the table surface 121.

[0056] After this, a workpiece setting step is executed. In the workpiece setting step, a workpiece 5 is set on the placement surface 32 of the first jig 3 installed on the table surface 121. In processing the first inclined surface 621, as shown in FIG. 12 , of the surfaces of the workpiece 5 on the opposite side to the first reference surface 611 in the thickness direction, the surface corresponding to the first inclined surface 621 (here, the fifth inclined surface 625) is placed on the placement surface 32 of the first jig 3. Then, the first reference surface 611 is inclined with respect to the table surface 121.

[0057] Thereafter, the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface, thereby forming a first inclined surface 621 that is inclined relative to the first reference surface 611. As a result of this processing, the angle α5 formed between the first reference surface 611 and the first inclined surface 621 becomes α5 = 180.54°.

[0058] In the cutting step of processing the first inclined surface 621, it is preferable to form a plurality of through holes 63 located within the region of the first inclined surface 621. This makes it possible to form a plurality of through holes 63 that are perpendicular to the first inclined surface 621.

[0059] 13, the fourth inclined surface 624 is formed. In order to process the fourth inclined surface 624, the same steps as those used to process the first inclined surface 621 (a jig setting step, a workpiece setting step, and a cutting step) are performed.

[0060] In the jig setting step, a first jig 3 corresponding to the processing of the fourth inclined surface 624 is set on the table surface 121. However, in the jig setting step for processing the fourth inclined surface 624, the same jig (first jig 3) as that for the first inclined surface 621 is used, so the setting work can be omitted.

[0061] Thereafter, the surface (eighth inclined surface 628) corresponding to the fourth inclined surface 624 on the back surface of the workpiece 5 is placed on the mounting surface 32 of the first jig 3, the first reference surface 611 is inclined, and then the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface 121, thereby forming the fourth inclined surface 624 inclined relative to the first reference surface 611. As a result of this processing, the angle α6 formed between the first reference surface 611 and the fourth inclined surface 624 becomes α6 = 180.54°.

[0062] In the cutting step of processing the fourth inclined surface 624, it is preferable to form a plurality of through holes 63 located within the region of the fourth inclined surface 624. This makes it possible to form a plurality of through holes 63 perpendicular to the fourth inclined surface 624.

[0063] 14, second inclined surface 622 is formed. In order to process second inclined surface 622, the same steps as those used to process first inclined surface 621 (a jig setting step, a workpiece setting step, and a cutting step) are performed.

[0064] In the jig setting step, a second jig 4 corresponding to the processing of the second inclined surface 622 is set on the table surface 121.

[0065] Thereafter, a surface (sixth inclined surface 626) on the back surface of the workpiece 5 corresponding to the second inclined surface 622 is placed on the mounting surface 32 of the second jig 4, the first reference surface 611 is inclined, and then the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a surface (XY plane) parallel to the table surface 121, thereby forming the second inclined surface 622 inclined relative to the first reference surface 611. As a result of this processing, the angle α7 formed between the first inclined surface 621 and the second inclined surface 622 becomes α7 = 179.64°.

[0066] In the cutting step of processing the second inclined surface 622, it is preferable to form a plurality of through holes 63 located within the region of the second inclined surface 622. This makes it possible to form a plurality of through holes 63 that are perpendicular to the second inclined surface 622.

[0067] Finally, as shown in Fig. 15, the third inclined surface 623 is formed. In order to process the third inclined surface 623, the same steps as those used to process the first inclined surface 621 (a jig setting step, a workpiece setting step, and a cutting step) are carried out.

[0068] In the jig installation step, a second jig 4 corresponding to the processing of the third inclined surface 623 is installed on the table surface 121. However, in the jig installation step for processing the third inclined surface 623, the same jig (second jig 4) as that for the second inclined surface 622 is used, so the installation work can be omitted.

[0069] Thereafter, a surface (seventh inclined surface 627) on the back surface of the workpiece 5 corresponding to the third inclined surface 623 is placed on the placement surface 32 of the second jig 4, the first reference surface 611 is inclined, and then the cutting step is performed. In the cutting step, the cutting tool 13 is moved along a plane (XY plane) parallel to the table surface 121, thereby forming the third inclined surface 623 inclined relative to the first reference surface 611. As a result of this processing, the angle α8 formed between the third inclined surface 623 and the fourth inclined surface 624 becomes α8 = 179.64°.

[0070] In the cutting step of processing the third inclined surface 623, it is preferable to form a plurality of through holes 63 located within the region of the third inclined surface 623. This makes it possible to form a plurality of through holes 63 perpendicular to the third inclined surface 623.

[0071] In this manner, a workpiece 6 having a reference surface 61 and a plurality of inclined surfaces 62 can be formed from the workpiece 5. In the machining method according to this embodiment, the inclined surfaces 62 can be formed by moving the tool of the three-axis machining center 1 parallel to the table top 121. This allows the inclined surfaces 62 inclined relative to the reference surface 61 to be formed without using a four-axis or five-axis machining center in which the angle of the table top 121 is variable. According to the machining method according to this embodiment, machining can be performed using the three-axis machining center 1 without using a four-axis or five-axis machining center. This allows machining to be performed while maintaining a high maximum tool rotation speed, resulting in a workpiece 6 with high machining accuracy. Note that four-axis or five-axis machining centers generally have a lower maximum rotation speed than the three-axis machining center 1.

[0072] In the first place, a 4-axis or 5-axis machining center cannot achieve machining accuracy of 1 / 100 of an angle, although the angle of the table surface 121 can be changed. In contrast, in the machining method according to this embodiment, the machining accuracy of the jig 2 can be set to 1 / 100°, so even if the angle of the inclined surface 62 with respect to the reference surface 61 is a small angle, machining can be performed with high precision.

[0073] [Modification] The above embodiment is merely one of various embodiments of the present invention. The embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0074] The processed product 6 according to the above embodiment has two reference surfaces 61, but the number of reference surfaces 61 may be one, or three or more.

[0075] Although the jig 2 according to the above embodiment has the positioning portion 35, the positioning portion 35 may be omitted. Furthermore, the jig 2 may be fixed to the table surface 121 using, for example, a vice or the like. In other words, the mounting holes 331, 341 of the jig 2 may be omitted.

[0076] In the processing method according to the above embodiment, the front surface processing step and the back surface processing step are performed after the preparation step, but the steps may be performed in the following order: the preparation step for forming a front surface reference surface, the front surface processing step, the preparation step for forming a back surface reference surface, and the back surface processing step. Also, the back surface processing step may be performed before the front surface processing step.

[0077] In addition, in the front surface processing step, the fifth inclined surface 625, the sixth inclined surface 626, the seventh inclined surface 627, and the eighth inclined surface 628 may be processed in this order. In addition, in the back surface processing step, the first inclined surface 621, the second inclined surface 622, the third inclined surface 623, and the fourth inclined surface 624 may be processed in this order.

[0078] In the above embodiment, the grooves 64 and the through holes 63 are formed only on the inclined surface 62 , but the grooves 64 and the through holes 63 may also be formed on the reference surface 61 .

[0079] 〔summary〕 As described above, the processing method of the first aspect is a processing method for processing a workpiece 5 using a three-axis machining center 1 to form a processed product 6 having a reference surface 61 and an inclined surface 62 inclined relative to the reference surface 61, and includes the steps of installing a jig 2 having a mounting surface 32 for placing the workpiece 5 on a table surface 121 of the three-axis machining center 1, placing the surface of the workpiece 5 opposite the reference surface 61 in the thickness direction on the mounting surface 32 and inclining the reference surface 61 relative to the table surface 121, and cutting the workpiece 5 with a cutting tool 13 of the three-axis machining center 1 to form the inclined surface 62.

[0080] According to this embodiment, the workpiece 5 is tilted using the jig 2, and machining is performed using the three-axis machining center 1, so that the inclined surface 62 can be formed at an angle corresponding to the angle of the mounting surface 32 of the jig 2 relative to the table surface 121. Therefore, even if the angle of the inclined surface 62 relative to the reference surface 61 is small, the inclined surface 62 can be machined in the workpiece 6. Furthermore, by machining using the three-axis machining center 1, the maximum rotation speed of the tool is higher than with a five-axis machining center, so the tool is less likely to break and machining precision can be improved.

[0081] In the processing method according to the second aspect, the jig 2 has a table-opposing surface 31 that faces the table surface 121 , and the placement surface 32 is a flat surface that is inclined relative to the table-opposing surface 31 in the first aspect.

[0082] According to this embodiment, by simply using the jig 2 having the table-opposing surface 31 and the mounting surface 32, it is possible to form the workpiece 6 having the reference surface 61 and the inclined surface 62 using an existing three-axis machining center 1.

[0083] In the processing method of the third aspect, in the first or second aspect, the jig 2 is a first jig 3 in which the angle between the table opposing surface 31 and the mounting surface 32 is a first angle, and the processing method further includes, after the step of forming the inclined surface 62 of the workpiece 5 by cutting, the steps of removing the first jig 3 from the table surface 121 and installing a second jig having a second angle different from the first angle on the table surface 121, placing the workpiece 5 on the mounting surface 32 of the second jig and inclining the inclined surface 62 with respect to the table surface 121, and cutting the workpiece 5 with the cutting tool 13 of the three-axis machining center 1 to form the inclined surface 62 and a second inclined surface 622 inclined with respect to the reference plane 61.

[0084] According to this embodiment, a workpiece 6 having a plurality of inclined surfaces 62 with different angles can be formed using a three-axis machining center.

[0085] The jig 2 of the fourth aspect is a jig 2 used when machining a workpiece 5 using a three-axis machining center 1, and comprises a table opposing surface 31 facing the table surface 121 of the three-axis machining center 1, and a mounting surface 32 provided on the opposite side of the table opposing surface 31 and on which the workpiece 5 is placed, and the mounting surface 32 is inclined with respect to the table opposing surface 31.

[0086] According to this embodiment, by simply using this jig 2, it is possible to form the workpiece 6 having the reference surface 61 and the inclined surface 62 using an existing three-axis machining center 1.

[0087] In the jig 2 according to the fifth embodiment, the jig 2 in the fourth embodiment has a plurality of mounting holes through which fixtures to be fixed to the table surface 121 are passed.

[0088] According to this embodiment, the jig 2 can be fixed to the table surface 121 by a fixture without using any other tools, and the workability is good in the preparation stage before processing.

[0089] The three-axis machining center 10 for machining inclined surfaces according to the sixth embodiment comprises a three-axis machining center 1 having a bed 11, a table surface 121 that moves relative to the bed 11, and a cutting tool 13 that machines a workpiece 5 on the table surface 121, and a jig 2 that is installed on the table surface 121 and has a mounting surface 32 on which the workpiece 5 is placed, and the mounting surface 32 is inclined relative to the table surface 121.

[0090] According to this embodiment, by using the three-axis machining center 10 for machining inclined surfaces, the inclined surface 62 can be formed at an angle corresponding to the angle of the mounting surface 32 of the jig 2 relative to the table surface 121. As a result, even if the angle of the inclined surface 62 relative to the reference surface 61 is small, machining can be performed at the maximum rotation speed of the tool of the three-axis machining center 1. [Explanation of symbols]

[0091] 10 3-axis machining center for inclined surface processing 1 3-axis machining center 121 Table surface 13 Cutting tools 2 Jig 3 First jig 4. Second jig 31 Table facing surface 32 Placement surface 5 Workpiece part 6 Processed products 61 Reference plane 62 Slope

Claims

1. A processing method for machining a workpiece using a three-axis machining center to form a processed product having a reference surface and an inclined surface inclined relative to the reference surface, comprising: a step of placing a jig having a mounting surface on which the workpiece is placed on a table surface of the three-axis machining center; placing a surface of the workpiece opposite to the reference surface in a thickness direction on the placement surface, and inclining the reference surface with respect to the table surface; cutting the workpiece with a cutting tool of the three-axis machining center to form the inclined surface; Including, Processing method.

2. the jig has a table-facing surface that faces the table surface, The placement surface is a plane inclined with respect to the table opposing surface. The processing method according to claim 1.

3. the jig is a first jig in which an angle formed between the table opposing surface and the placement surface is a first angle, The processing method includes: After the step of forming the inclined surface of the workpiece by cutting, removing the first jig from the table surface and installing a second jig having a second angle different from the first angle on the table surface; placing the workpiece on a mounting surface of the second jig and inclining the inclined surface with respect to the table surface; cutting the workpiece with a cutting tool of the three-axis machining center to form the inclined surface and a second inclined surface inclined relative to the reference surface; Further comprising: The processing method according to claim 2.

4. A jig used when machining a workpiece using a three-axis machining center, a table opposing surface opposing a table surface of the three-axis machining center; a placement surface on which the workpiece is placed, the placement surface being provided on the opposite side of the table opposing surface; Equipped with The placement surface is inclined with respect to the table opposing surface. jig.

5. The jig has a plurality of mounting holes through which fasteners to be fixed to the table surface are passed. The jig according to claim 4.

6. a three-axis machining center having a bed, a table surface that moves relative to the bed, and a cutting tool that processes a workpiece on the table surface; a jig that is installed on the table surface and has a mounting surface on which the workpiece is placed; Equipped with The placement surface is inclined relative to the table surface. 3-axis machining center for processing inclined surfaces.

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