Machining method for part with irregular contour

Abstract

The invention discloses a machining method for a part with an irregular outline, relates to a machining method for a part, and solves the technical problem that the machining quality of a workpiece is influenced by an existing machining mode of clamping the part for multiple times. The method comprises the steps that firstly, the front face of the part is roughly turned to obtain a front face end face and an outer circle face; secondly, the front end face serves as a supporting face, the outer circular face serves as a positioning face, the supporting face and the positioning face are placed on a tool table, and the part is fixed through a clamping plate; and thirdly, the back face of the part is milled to form a boss face, a plurality of through holes are drilled in the boss face, the first through hole is machined to obtain a first technological pin hole, the second through hole is machined to obtain a second technological pin hole, and the other through holes are tapped to obtain technological screw holes. The machining efficiency of the irregular profile part is improved, and the machining precision of the part is improved.

Description

Technical Field

[0001] The present invention relates to a method for processing parts, and more particularly to a method for processing parts with irregular contours. Background Art

[0002] During the machining process, when the part's outer contour is irregular, there are multiple mounting holes on one side and the holes have high precision requirements, it is difficult to fully meet the drawing size requirements through processing techniques such as turning, milling, drilling, and boring; in addition, the overall thickness of the part is relatively thin and it is difficult to clamp it from the side, which seriously affects the production and processing and quality of the part.

[0003] The existing parts have a roughly irregular circular outline, with a stepped hole (composed of a first stepped hole and a second stepped hole) and a bearing mounting hole on the front of the workpiece. According to the drawing requirements, there are coaxiality precision requirements between the stepped holes (the first stepped hole and the second stepped hole), distance and parallelism requirements between the bearing mounting hole and the second stepped hole, verticality requirements between the bearing mounting hole and the front end face of the workpiece, and flatness requirements for the front end face of the workpiece. Since the overall thickness of the part is thin and there is no good clamping position, if multiple clamping is used, the accuracy between each feature cannot be guaranteed, affecting the overall processing quality of the workpiece. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a processing method for parts with irregular contours in view of the deficiencies in the prior art, so as to solve the technical problem that the existing processing method of multiple clamping of parts affects the processing quality of the workpiece.

[0005] The present invention provides a method for processing parts with irregular contours, the method comprising:

[0006] Step 1: Rough turning the front surface of the part to obtain the front end surface and the outer cylindrical surface;

[0007] Step 2: Use the front end surface as a supporting surface, use the outer cylindrical surface as a positioning surface, place the supporting surface and the positioning surface on a workbench, and fix the part by a clamping plate;

[0008] Step 3: Milling the back of the part to form a boss surface, drilling a plurality of through holes on the boss surface, processing the first through hole to obtain a first process pin hole, processing the second through hole to obtain a second process pin hole, and tapping the remaining through holes to obtain process screw holes;

[0009] Step 4: Fix the part on the workbench through the first process pin hole, the second process pin hole and the process screw hole;

[0010] Step 5: milling the part to form a required end face;

[0011] Step six: The first process pin hole, the second process pin hole and the process screw hole are all expanded to complete the processing.

[0012] As a further improvement, in step four, the method of fixing the part on the workbench through the first process pin hole, the second process pin hole and the process screw hole is to place the part on the workbench, adjust the position of the part so that the positioning holes on the workbench match the first process pin hole, the second process pin hole and the process screw hole respectively, match the first process pin hole and the second process pin hole with the pin, and match the process screw hole with the screw.

[0013] Furthermore, in step three, the method of processing the first through hole to obtain the first process pin hole and processing the second through hole to obtain the second process pin hole is: taking the inner diameter of the boss surface contour as the first reference value, fine-processing the first through hole according to the first reference value to obtain the first process pin hole, detecting the aperture of the first process pin hole to obtain the second reference value, and fine-processing the second through hole according to the second reference value to obtain the second process pin hole.

[0014] Furthermore, the first reference value and the second reference value are obtained by a digital detection method.

[0015] Furthermore, in step six, the method for expanding the first process pin hole, the second process pin hole and the process screw hole to form the required bottom hole is to set a third reference value, and expand the first process pin hole, the second process pin hole and the process screw hole according to the third reference value to form the required bottom hole.

[0016] Furthermore, the first process pin hole and the second process pin hole are respectively arranged on two sides of the part.

[0017] Beneficial Effects

[0018] The advantages of the present invention are:

[0019] 1. The present invention performs rough turning on the front side of the part to obtain the front end face; uses the front end face as a supporting surface, places the supporting surface on a workbench and positions the part through the workbench; performs milling on the back side of the part to form a boss surface, drills a plurality of through holes on the boss surface, processes two of the through holes to obtain a first process pin hole and a second process pin hole, and performs tapping on the remaining through holes to obtain a process screw hole; fixes the part on the workbench through the first process pin hole, the second process pin hole and the process screw hole; mills the part to form the required end face; expands the first process pin hole, the second process pin hole and the process screw hole to complete the processing. The processing method has simple processing procedures, the rough turning procedure prepares the supporting surface for the processing of the process hole, and the process hole realizes one-time clamping and processing for the milling and boring of the part. The method not only improves the processing efficiency of parts with irregular contours, but also improves the processing accuracy of the parts.

[0020] 2. The present invention performs fine processing on the first through hole according to the first reference value to obtain the first process pin hole, and performs fine processing on the second through hole according to the second reference value to obtain the second process pin hole. Setting the first reference value and the second reference value can provide processing allowance and reduce errors caused by subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of parts of the present invention;

[0022] Figure 2 It is a cross-sectional view of the parts of the present invention;

[0023] Figure 3 It is a schematic diagram of the boss surface of a part of the present invention;

[0024] Figure 4 It is a schematic diagram of the first process pin hole, the second process pin hole and the process screw hole structure of the present invention.

[0025] Among them: 1-first stepped hole, 2-second stepped hole, 3-bearing mounting hole, 4-external cylindrical surface, 5-first external cylindrical end surface, 6-second external cylindrical end surface, 7-front end surface, 8-boss surface, 9-first through hole, 10-third external cylindrical end surface, 11-first process pin hole, 12-process screw hole, 13-second process pin hole, 14-part, 15-second through hole. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0027] See also Figure 1-Figure 4 The present invention provides a method for processing parts with irregular contours, the method comprising:

[0028] Step 1: If Figure 1 As shown, the part 14 is sent to a lathe, the inner cylindrical surface of the part 14 is tightened by a three-jaw chuck for clamping, and the front side of the part 14 is rough-turned to obtain the front end face 7, the outer cylindrical surface 4 and the second stepped hole 2.

[0029] Step 2: Send part 14 to the workbench with the back of part 14 facing up, use the front end face 7 as the supporting surface, and the outer cylindrical surface 4 as the positioning surface. The positioning surface is aligned with the contour of the workbench for positioning, and the supporting surface is placed on the workbench and fixed to the part 14 by the clamp of the workbench.

[0030] Step 3: If Figure 3-4As shown, the back of the part 14 is milled to form a third outer cylindrical end face 10 and a boss surface 8, eight through holes are drilled on the boss surface 8, two of the through holes are processed to obtain a first process pin hole 11 and a second process pin hole 13, and the remaining through holes are tapped to obtain a process screw hole 12.

[0031] In step three, the method of processing two of the through holes to obtain the first process pin hole 11 and the second process pin hole 13 is as follows: the two through holes are the first through hole 9 and the second through hole 15, the inner diameter of the boss surface profile is used as the first reference value, the first through hole 9 is finely processed according to the first reference value to obtain the first process pin hole 11, the aperture of the first process pin hole 11 is detected to obtain the second reference value, and the second through hole 15 is finely processed according to the second reference value to obtain the second process pin hole 13. The first reference value and the second reference value are set to provide a processing allowance to reduce the error caused by subsequent processing.

[0032] The first reference value and the second reference value are obtained by a digital detection method, which includes three-dimensional photography, articulated arm and laser measurement.

[0033] Step 4: Fix the part 14 on the workbench through the first process pin hole 11, the second process pin hole 13 and the process screw hole 12.

[0034] In step four, the method of fixing the part 14 on the workbench through the first process pin hole 11, the second process pin hole 13 and the process screw hole 12 is as follows: placing the part 14 on the workbench, adjusting the position of the part 14 so that the positioning holes on the workbench match the first process pin hole 11, the second process pin hole 13 and the process screw hole 12 respectively, positioning the first process pin hole 11 and the second process pin hole 13 with pins, and positioning the process screw hole 12 with screws, thereby fixing the part 14.

[0035] Step 5: If Figure 2 As shown, the part 14 is milled to form the required first outer cylindrical end face 5 and front end face 7, and then the first stepped hole 1, the second stepped hole 2 and another bearing mounting hole 3 are bored to achieve one-time clamping to ensure the accuracy requirements of the drawing.

[0036] Step 6: The first process pin hole 11, the second process pin hole 13 and the process screw hole 12 are all expanded by a radial drilling machine to complete the processing. In step 6, the method of expanding the first process pin hole 11, the second process pin hole 13 and the process screw hole 12 to form the required bottom hole is to set a third reference value, and expand the first process pin hole 11, the second process pin hole 13 and the process screw hole 12 according to the third reference value to form the required bottom hole.

[0037] The first process pin hole 11 and the second process pin hole 13 are respectively arranged on both sides of the part 14 , and the two process pin holes and the stepped hole of the part 14 are kept at the same horizontal line.

[0038] This processing method uses the process pin hole and the process screw hole to realize the clamping of the parts. In the subsequent milling and boring process, the parts are clamped once, and all the holes are bored in one process, ensuring the various shape and position tolerance requirements between the holes. The process is simple and easy to operate. This method not only improves the processing efficiency of irregular contour parts, but also improves the processing accuracy of parts.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for processing parts with irregular contours, characterized in that: The method is, Step 1: Rough turning the front surface of the part (14) to obtain a front end surface (7) and an outer cylindrical surface (4); Step 2: Using the front end surface (7) as a supporting surface and the outer cylindrical surface (4) as a positioning surface, placing the supporting surface and the positioning surface on a workbench and fixing the part (14) by a clamping plate; Step 3: Milling is performed on the back of the part (14) to form a boss surface (8), a plurality of through holes are drilled on the boss surface (8), a first through hole (9) is processed to obtain a first process pin hole (11), a second through hole (15) is processed to obtain a second process pin hole (13), and the remaining through holes are all tapped to obtain process screw holes (12); Step 4: Fixing the part (14) on the workbench through the first process pin hole (11), the second process pin hole (13) and the process screw hole (12); Step 5: milling the part (14) to form a required end face; Step six: The first process pin hole (11), the second process pin hole (13) and the process screw hole (12) are all expanded to complete the processing.

2. A method for processing parts with irregular contours according to claim 1, characterized in that: In step four, the method for fixing the part (14) on the workbench through the first process pin hole (11), the second process pin hole (13) and the process screw hole (12) is as follows: placing the part (14) on the workbench, adjusting the position of the part (14) so ​​that the positioning holes on the workbench match the first process pin hole (11), the second process pin hole (13) and the process screw hole (12) respectively, matching the first process pin hole (11) and the second process pin hole (13) with the pin, and matching the process screw hole (12) with the screw.

3. A method for processing parts with irregular contours according to claim 1, characterized in that: In step three, the method for processing the first through hole (9) to obtain the first process pin hole (11) and the method for processing the second through hole (15) to obtain the second process pin hole (13) is as follows: taking the inner diameter of the profile of the boss surface (8) as the first reference value, fine-processing the first through hole (9) according to the first reference value to obtain the first process pin hole (11), detecting the aperture of the first process pin hole (11) to obtain the second reference value, and fine-processing the second through hole (15) according to the second reference value to obtain the second process pin hole (13).

4. A method for processing parts with irregular contours according to claim 3, characterized in that: The first reference value and the second reference value are obtained by a digital detection method.

5. A method for processing parts with irregular contours according to claim 1, characterized in that: In step six, the method for expanding the first process pin hole (11), the second process pin hole (13) and the process screw hole (12) to form the required bottom hole is to set a third reference value, and expand the first process pin hole (11), the second process pin hole (13) and the process screw hole (12) according to the third reference value to form the required bottom hole.

6. A method for processing parts with irregular contours according to claim 1, characterized in that: The first process pin hole (11) and the second process pin hole (13) are respectively arranged on two sides of the part (14).

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