Method for acquiring a zero point for processing a profiled product

Abstract

The application discloses a kind of special-shaped product processing zero point acquisition method, to solve the inconvenience of special-shaped product outer wall processing zero point measurement operation, measurement efficiency is low, cannot guarantee the deficiency of measurement accuracy.The present application comprises the following steps: S1, the jig matched with special-shaped product is loaded to workbench, the reference hole axis set on jig coincides with the rotary center line of workbench;S2, special-shaped product is clamped to jig, and the outer side of special-shaped product corresponds with the outer side wall of jig one-to-one parallel;S3, rotate jig, with the reference edge of any one outer side of jig as reference edge, correct the reference edge and X axis parallel;S4, calculate actual processing coordinate, actual processing coordinate=workbench rotary center coordinate+special-shaped product outer side face offset value.The special-shaped product processing zero point acquisition method of the present application facilitates the acquisition of each processing side of special-shaped product processing zero point.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and more particularly to a method for obtaining a processing zero point of a special-shaped product. Background Art

[0002] Many semiconductor cavity parts have heterogeneous structures with complex structures, high machining precision, and many machining surfaces. Horizontal machining centers are generally required during the manufacturing process to process the outer side of the product to ensure the dimensional tolerance and position tolerance of the side and the upper and lower surfaces of the cavity. However, the machining of heterogeneous multi-faceted sides has the problem of being unable to measure the zero point of the product, resulting in dimensional deviations between the upper and lower surfaces and the side, which cannot meet the customer's drawing requirements. Generally, measurement is performed using split-center measurement, where the feature to be measured needs to have two surfaces perpendicular to the surface to be machined, or single-side measurement is used, where one surface perpendicular to the surface to be machined. Since the shape of heterogeneous products does not meet the above two conditions, it is not convenient to measure, and the measured accuracy cannot meet the drawing requirements. In addition, each machined surface needs to be measured in a separate machining coordinate system, which has low measurement efficiency and cannot guarantee the measurement accuracy of such cavity parts. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a method for obtaining the processing zero point of special-shaped products, which facilitates the acquisition of the processing zero point of each processing side of the special-shaped product, ensures that the side processing of the special-shaped product can accurately and quickly complete the processing zero point measurement, and improves the processing accuracy and consistency of the product.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a method for obtaining the zero point of processing a special-shaped product, characterized by comprising the following steps:

[0005] S1, load the jig that matches the special-shaped product onto the workbench, and ensure that the axis of the reference hole set on the jig coincides with the rotation centerline of the workbench;

[0006] S2, clamp the special-shaped product onto the jig, and the outer side of the special-shaped product is parallel to the outer wall of the jig one by one;

[0007] S3, rotate the fixture, use any outer edge of the fixture as the reference edge, and calibrate the reference edge to be parallel to the X-axis;

[0008] S4, calculate the actual processing coordinates, actual processing coordinates = worktable rotation center coordinates + special-shaped product outer side offset value.

[0009] In this application, the processing zero point of the special-shaped product is transferred to the jig, and the jig is precisely installed on the workbench. The outer walls of the jig are parallel to the outer side surfaces of the special-shaped product. By determining the coordinate positions of each side of the jig, the processing coordinate positions of each outer side surface of the special-shaped product can be indirectly obtained. Using the rotation center coordinates of the workbench as the reference coordinates, the jig reference holes are offset to the theoretical relative values ​​of the processing coordinate system to obtain an accurate processing coordinate system and realize the processing coordinates of each outer side surface. The relative positions of each outer wall of the jig are determined, and the offset values ​​of the outer side surfaces of the special-shaped product are also determined. The outer wall of the special-shaped product to be processed can be made perpendicular to the Z axis by rotating the workbench, thereby quickly completing the processing coordinate measurement of the side surface to be processed. Only one reference edge correction is required, and the subsequent determination of the processing coordinate system can be realized by calculation. The operation is convenient and avoids cumulative errors.

[0010] The method for obtaining the processing zero point of special-shaped products in the present application facilitates the acquisition of the processing zero point of each processing side of the special-shaped product, ensures that the side processing of the special-shaped product can accurately and quickly complete the processing zero point measurement, and improves the processing accuracy and consistency of the product.

[0011] Preferably, the upper surface of the jig in S1 is perpendicular to the axis of the reference hole.

[0012] This setting ensures the accuracy of the position of special-shaped products after they are loaded into the fixture.

[0013] Preferably, the outer side of the special-shaped product extends beyond the outer wall of the jig, and the distance between the outer side of the special-shaped product and the outer wall of the jig is 5-10 mm.

[0014] When machining the outer surface of special-shaped products, the machining head will not touch the outer wall of the fixture.

[0015] Preferably, a plurality of process holes are provided on the surface of the special-shaped product, and a plurality of positioning pins are connected on the surface of the jig in correspondence with the process holes; in the process of clamping the special-shaped product on the jig, the process holes and the positioning pins are connected in correspondence with each other to achieve precise positioning.

[0016] The special-shaped product and the jig are precisely positioned and connected through process holes and positioning pins, so that the special-shaped product can be accurately and reliably loaded on the jig.

[0017] Preferably, in S4, the reference edge determined in S3 is used as a reference, and the workbench is rotated so that the outer side surface of the special-shaped product to be processed is perpendicular to the Z axis, and the outer side surface of the special-shaped product to be processed faces the processing head on the machine tool, and then the actual processing coordinates of the outer side surface of the special-shaped product to be processed are calculated.

[0018] The jig is a standard part with precise dimensions. After the reference edge is calibrated, the rotating workbench can make the jig reach the precise rotation position, so that the outer surface of the special-shaped product is perpendicular to the Z axis, and the actual processing coordinates of the outer surface of the special-shaped product to be processed are calculated.

[0019] Preferably, the reference hole on the fixture is arranged on the perpendicular midline of an outer side, and the outer side is used as the reference side.

[0020] This setting makes it easier to obtain processing coordinates.

[0021] Preferably, the midpoint of each outer side of the fixture is the reference zero point, the reference zero point coordinate = the worktable rotation center coordinate + the fixture outer wall offset value, the actual processing coordinate of the special-shaped product = the reference zero point coordinate + Z-axis offset, and the Z-axis offset value = the distance between the outer side of the special-shaped product and the outer wall of the fixture.

[0022] The actual processing coordinates of special-shaped products can be determined by the Z-axis offset of the reference zero point on the fixture, and the processing zero point can be easily obtained.

[0023] Preferably, a through hole is provided on the special-shaped product which passes through the product from top to bottom, a positioning column is provided on the jig corresponding to the through hole, a clamping seat which can move axially is installed on the positioning column, a number of clamping arms which can move radially are evenly distributed on the outer wall of the clamping seat, a positioning spring is installed between the clamping arm and the clamping seat, a guide surface which is inclined from top to bottom and outward is provided on the outer wall of the clamping arm, a locking nut is installed on the upper part of the positioning column, the locking nut abuts on the clamping seat, and the lower end of the clamping arm abuts on the surface of the special-shaped product.

[0024] When loading a special-shaped product onto a jig, the through-hole on the special-shaped product is aligned with the positioning column and inserted. During the insertion process, the guide surface on the clamping arm abuts against the edge of the through-hole, causing the clamping arm to move radially inward. After being inserted into place, the clamping arm is exposed to the upper end of the through-hole. Under the action of the positioning spring, the clamping arm pops outward, achieving preliminary positioning of the special-shaped product. Then, the position of the special-shaped product and the jig is adjusted to achieve precise positioning of both. After precise positioning is completed, the locking nut is rotated to push the clamping seat downward, so that the lower end of the clamping arm abuts against the surface of the special-shaped product to lock the special-shaped product and the jig. This structural setting is conducive to the rapid loading and positioning of special-shaped products and jigs, and the clamping connection between the two is reliable, which is conducive to ensuring the accuracy of the processing zero point acquisition.

[0025] Preferably, a step surface is provided on the upper portion of the positioning column, an abutment spring is provided between the step surface and the lower portion of the clamping seat, and the upper portion of the clamping seat abuts against the locking nut.

[0026] The step surface realizes the positioning of the clamping seat, and the abutment spring abuts against the clamping seat to realize the positioning of the clamping seat, ensuring that the clamping arm can pop outward and reserving sufficient moving space for the clamping seat.

[0027] Compared with the prior art, the beneficial effects of the present invention are: the method for obtaining the processing zero point of special-shaped products in this application facilitates the acquisition of the processing zero point of each processing side of the special-shaped products, ensures that the side processing of the special-shaped products can accurately and quickly complete the processing zero point measurement, and improves the processing accuracy and consistency of the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the special-shaped product of the present invention;

[0029] Figure 2 is a top view of the fixture of the present invention;

[0030] Figure 3 is a cross-sectional view of a special-shaped product of the present invention being loaded onto a jig;

[0031] Figure 4 This is a schematic diagram of the connection structure of the connecting column on the fixture of the present invention;

[0032] In the figure: 1. Special-shaped product, 2. Jig, 3. Reference hole, 4. Process hole, 5. Locating pin, 6. Through hole, 7. Locating column, 8. Clamping seat, 9. Clamping arm, 10. Locating spring, 11. Mounting groove, 12. End cover, 13. Flange, 14. Guide surface, 15. Locking nut, 16. Step surface, 17. Abutment spring, 18. Reference edge, 19. Reference zero point. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1: A method for obtaining a zero point for processing a special-shaped product, comprising the following steps:

[0035] S1, the fixture 2 that matches the special-shaped product 1 (see attached Figure 2 ) is loaded onto the workbench, and the axis of the reference hole 3 set on the fixture coincides with the rotation center line of the workbench; in this embodiment, the special-shaped product is a hexagonal structure (see attached Figure 1 ); The upper surface of the fixture in S1 is perpendicular to the axis of the reference hole;

[0036] S2, clamp the special-shaped product onto the fixture (see attached Figure 3 , Attachment Figure 4 ), the outer side of the special-shaped product is parallel to the outer wall of the jig one by one; the outer side of the special-shaped product extends beyond the outer wall of the jig; the distance between the outer side of the special-shaped product and the outer wall of the jig is 5-10mm;

[0037] S3, rotate the fixture, use any outer edge of the fixture as the reference edge, and calibrate the reference edge to be parallel to the X-axis;

[0038] S4, calculate the actual processing coordinates, which are the actual processing coordinates = the worktable rotation center coordinates + the offset value of the outer side of the special-shaped product. The offset value of the outer side of the special-shaped product is the offset value of the outer side relative to the worktable rotation center in the X-axis and Z-axis directions.

[0039] A plurality of process holes 4 are provided on the surface of the irregularly shaped product, and a plurality of positioning pins 5 are connected to the process holes on the surface of the jig in a one-to-one correspondence. In this embodiment, two positioning pins are provided; when the irregularly shaped product is clamped to the jig, the process holes and the positioning pins are correspondingly inserted and connected to achieve precise positioning. A through hole 6 is provided on the irregularly shaped product, and a positioning column 7 is provided on the jig in correspondence with the through hole. The diameter of the positioning column is smaller than the diameter of the through hole. An axially movable clamping seat 8 is installed on the positioning column. A plurality of radially movable clamping arms 9 are evenly distributed on the outer wall of the clamping seat. A positioning spring 10 is installed between the clamping arm and the clamping seat. A mounting groove 11 is provided on the clamping seat and in correspondence with the clamping arm. One end of the clamping arm is provided in the mounting groove. The open end of the mounting groove is connected to the end cover 12. A flange 13 is provided on the inner end of the clamping arm. The positioning spring abuts between the bottom of the mounting groove and the clamping arm, and the flange abuts against the end cover. The outer wall of the clamping arm is provided with a guide surface 14 that is tilted downward and outward. A locking nut 15 is installed on the upper part of the positioning column. The locking nut abuts the clamping seat, and the lower end of the clamping arm abuts the surface of the special-shaped product. A step surface 16 is provided on the upper part of the positioning column. An abutting spring 17 is provided between the step surface and the lower part of the clamping seat. The upper part of the clamping seat abuts the locking nut. During the process of loading the S2 special-shaped product into the jig, the through hole on the special-shaped product is aligned with the positioning column and inserted. During the insertion process, the guide surface on the clamping arm abuts the edge of the through hole, causing the clamping arm to move radially inward. After insertion, the clamping arm is exposed to the upper end of the through hole. Under the action of the positioning spring, the clamping arm pops outward, at this time achieving preliminary positioning of the special-shaped product. Then, the position of the special-shaped product and the jig is adjusted to achieve precise positioning of both. After precise positioning is completed, the locking nut is rotated to push the clamping seat downward, causing the lower end of the clamping arm to abut the surface of the special-shaped product, thereby locking the special-shaped product and the jig.

[0040] During step S4, using the reference edge determined in step S3 as a reference, the worktable is rotated so that the outer side of the irregularly shaped product to be processed is perpendicular to the Z axis, with the outer side of the irregularly shaped product facing the machining head on the machine tool. The actual machining coordinates of the outer side of the irregularly shaped product to be processed are then calculated. The reference hole on the fixture is located on the perpendicular midline of one of the outer sides, with this outer side serving as the reference edge 18. The midpoint of each outer side of the fixture serves as the reference zero point 19. The reference zero point coordinates equal the worktable rotation center coordinates + the fixture outer wall offset. The actual machining coordinates of the irregularly shaped product equal the reference zero point coordinates + the Z-axis offset. The Z-axis offset value is the distance between the outer side of the irregularly shaped product and the outer wall of the fixture.

[0041] In this application, the processing zero point of the special-shaped product is transferred to the jig, and the jig is precisely installed on the workbench. The outer walls of the jig are parallel to the outer side surfaces of the special-shaped product. By determining the coordinate positions of each side of the jig, the processing coordinate positions of each outer side surface of the special-shaped product can be indirectly obtained. Using the rotation center coordinates of the workbench as the reference coordinates, the jig reference holes are offset to the theoretical relative values ​​of the processing coordinate system to obtain an accurate processing coordinate system and realize the processing coordinates of each outer side surface. The relative positions of each outer wall of the jig are determined, and the offset values ​​of the outer side surfaces of the special-shaped product are also determined. The outer wall of the special-shaped product to be processed can be made perpendicular to the Z axis by rotating the workbench, thereby quickly completing the processing coordinate measurement of the side surface to be processed. Only one reference edge correction is required, and the subsequent determination of the processing coordinate system can be realized by calculation. The operation is convenient and avoids cumulative errors.

[0042] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A method for obtaining the zero point of processing a special-shaped product, characterized in that: The following steps are involved: S1, load the jig that matches the special-shaped product onto the workbench, and ensure that the axis of the reference hole set on the jig coincides with the rotation centerline of the workbench; S2, clamp the special-shaped product onto the jig, and the outer side of the special-shaped product is parallel to the outer wall of the jig one by one; S3, rotate the fixture, use any outer edge of the fixture as the reference edge, and calibrate the reference edge to be parallel to the X-axis; S4, calculate the actual processing coordinates, actual processing coordinates = worktable rotation center coordinates + special-shaped product outer side offset value; A through hole is provided on the special-shaped product, which passes through the product up and down. A positioning column is provided on the jig corresponding to the through hole. A clamping seat that can move axially is installed on the positioning column. A number of clamping arms that can move radially are evenly distributed on the outer wall of the clamping seat. A positioning spring is installed between the clamping arm and the clamping seat. A guide surface that is inclined from top to bottom and outward is provided on the outer wall of the clamping arm. A locking nut is installed on the upper part of the positioning column, and the locking nut abuts on the clamping seat. The lower end of the clamping arm abuts on the surface of the special-shaped product.

2. The method for obtaining the zero point of processing a special-shaped product according to claim 1, characterized in that: In S1, the upper surface of the fixture is perpendicular to the axis of the reference hole.

3. The method for obtaining the zero point of special-shaped product processing according to claim 1, characterized in that: The outer side of the special-shaped product extends beyond the outer side wall of the fixture.

4. The method for obtaining the zero point of processing a special-shaped product according to claim 3, wherein: The distance between the outer side of the special-shaped product and the outer wall of the fixture is 5-10mm.

5. The method for obtaining the zero point of processing a special-shaped product according to claim 1, wherein: Several process holes are set on the surface of the special-shaped product, and several positioning pins are connected to the process holes on the surface of the fixture in a one-to-one correspondence; when the special-shaped product is clamped on the fixture, the process holes and the positioning pins are connected in a corresponding insertion manner to achieve precise positioning.

6. The method for obtaining the zero point of processing a special-shaped product according to claim 1, wherein: In S4, based on the reference edge determined in S3, the workbench is rotated so that the outer side surface of the special-shaped product to be processed is perpendicular to the Z axis, and the outer side surface of the special-shaped product to be processed faces the processing head on the machine tool, and then the actual processing coordinates of the outer side surface of the special-shaped product to be processed are calculated.

7. The method for obtaining the zero point of processing a special-shaped product according to claim 1, wherein: The reference hole on the fixture is set on the perpendicular midline of an outer side, and the outer side is used as the reference side.

8. The method for obtaining the zero point of processing a special-shaped product according to claim 1, wherein: The midpoint of each outer side of the fixture is the reference zero point. The reference zero point coordinate = the worktable rotation center coordinate + the fixture outer wall offset value. The actual processing coordinate of the special-shaped product = the reference zero point coordinate + the Z-axis offset. The Z-axis offset value = the distance between the outer side of the special-shaped product and the outer wall of the fixture.

9. The method for obtaining the zero point of processing a special-shaped product according to claim 1, wherein: A step surface is provided on the upper part of the positioning column, an abutting spring is provided between the step surface and the lower part of the clamping seat, and the upper part of the clamping seat abuts on the locking nut.

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