A method for machining reticulate patterns on the surface of thin parts

Abstract

The present invention discloses a method for machining reticulations on the surface of thin parts. During the machining process, fixture A and fixture B are used, and by means of wire cutting and through the control of process steps, the technical problem of machining reticulations on the surface of thin parts can be effectively solved. The reticulations are machined by wire cutting. Compared with the existing milling and rolling processes, it is more suitable for the reticulation machining of thin parts, with a high yield rate and improved production efficiency.

Description

Technical Field

[0001] The present invention relates to the technology of part surface processing, in particular to a method for processing reticulations on the surface of thin parts. Background Art

[0002] During the assembly and use of components, it is common to have multiple parts assembled together. To prevent the parts from rotating when tightened, it is necessary to increase the friction between the parts, and reticulations are processed on the part surface. For thin parts with a thickness of less than 2 mm, the design requires processing reticulations m0.3 GB / T6403.3 - 2008 knurling on both the front and back planes. However, for the existing milling and rolling processing methods, it is difficult to process thin parts, and it is difficult to ensure the qualified rate. Therefore, a new method for processing reticulations on the surface of thin parts is needed to reduce the processing difficulty and improve the qualified rate. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for processing reticulations on the surface of thin parts, with simple processing technology, high efficiency, and high product qualified rate.

[0004] The technical solution of the present invention: A method for processing reticulations on the surface of thin parts, characterized by including the following steps:

[0005] Step (1): When loading and unloading on a shearing machine, control the length L and width B of each sheet within the specified range.

[0006] Step (2): First fix more than 2 sheets together, and then drill and ream 2 - ΦA mounting holes on a machining center, ensuring that the diameter size, hole pitch sizes LA and BA of the 2 - ΦA mounting holes on each sheet are within the specified range;

[0007] Step (3): First use a dial indicator to align the B surface on fixture A on a wire cutting equipment, and control the pointer variation within 0.01 mm; then fix a single sheet on the threaded locating pin 6 on fixture A, and perform wire cutting on the B surface of the part contour drawing. When performing wire cutting, ensure that the straight reticulations processed on the B surface of the part contour drawing meet the requirements of the straight reticulation drawing and the reticulation size drawing;

[0008] Step (4): Use a dial indicator to align the B surface on fixture B on a wire cutting equipment, and control the pointer variation within 0.01 mm; then fix a single sheet on the threaded locating pin 6 on fixture B, with the surface having been wire cut with straight reticulations facing outward, and tighten the hexagon nut 5 to fix the single sheet; when performing wire cutting, ensure that the reticulations processed on the B surface of the part contour drawing meet the requirements of the reticulation size drawing and the reticulation drawing;

[0009] Step ⑸: Fix the single-piece sheet on the threaded locating pin 6 of the aligned fixture A, and perform wire cutting on the A surface of the part contour drawing. Ensure that the straight mesh pattern machined on the A surface of the part contour drawing meets the requirements of the straight mesh pattern drawing and the mesh pattern dimension drawing during wire cutting.

[0010] Step ⑹: Fix the single-piece sheet on the threaded locating pin 6 of the aligned fixture B, with the surface having the straight mesh pattern facing outward. Tighten the hexagon nut 5 to fix the single-piece sheet. When performing wire cutting, ensure that the mesh pattern machined on the A surface of the part contour drawing meets the requirements of the straight mesh pattern drawing, the mesh pattern dimension drawing, and the mesh pattern drawing.

[0011] 2. The method for machining a mesh pattern on the surface of a thin part according to claim 1, wherein in the step ⑵, ensure that the clearance between the 2-ΦA mounting holes and the 2 locating pins on the fixture is 0.005 - 0.015 mm during reaming.

[0012] 3. The method for machining a mesh pattern on the surface of a thin part according to claim 1, wherein the structures of the fixture A and the fixture B include a fixture body, on which there is a mounting plate. The mounting plate is provided with fixing pins, and the locating pins are connected to the mounting plate through hexagon nuts and washers. The locating pins on the fixture B are inclined.

[0013] Advantages of the present invention: In the process of mechanical processing of the present invention, there are designed fixture A and fixture B, and both fixture A and fixture B are composed of a fixture body 1, a mounting plate 2, fixing pins 3, washers 4, hexagon nuts 5, and threaded locating pins 6. The mounting plate 2 is fixed on the fixture body 1 through 2 fixing pins 3. In order to ensure that the size, angle, and shape of the mesh pattern meet the requirements of GB / T6403.3 - 2008, it is specified in the design that the B surface of the mounting plate 2 on the fixture A and the fixture B has a perpendicularity requirement of 0.015 with respect to the mounting reference surface A of the fixture body 1. After installing the single-piece sheet on the locating pin 6 of the fixture A or the fixture B, tighten the hexagon nut 5 to make the washer 4 evenly press both ends of the single-piece sheet. In order to ensure that the size, angle, and shape of the mesh pattern meet the requirements of GB / T6403.3 - 2008, when designing the fixture B, it is specified that there is a requirement of 30° between the 2 threaded locating pins 6 and the mounting reference surface A of the fixture body 1. The B surface of the mounting plate 2 on the fixture A and the fixture B is the positioning surface. Therefore, after installing and pressing the bolts and nuts in the groove C on the fixture A and the fixture B, a dial indicator is required to align the B surface on the fixture A and the fixture B on the wire cutting equipment, and measure at any position in the up, down, left, and right directions to ensure that the pointer variation is controlled within 0.01 mm. In the process of mechanical processing, by using the fixture A and the fixture B and adopting the wire cutting method, through the control of the technological steps, the technical problem of machining a mesh pattern on the surface of a thin part can be effectively solved. By wire cutting to machine the mesh pattern, compared with the existing milling and rolling processing, it is more suitable for the mesh pattern processing of thin parts, with a high yield rate and improved production efficiency. Description of the Drawings

[0014] Attached Figure 1 is a schematic diagram of the thin part structure of the present invention;

[0015] Attached Figure 2 is a schematic diagram of the loading and unloading of the present invention on a shearing machine;

[0016] Attached Figure 3 is a schematic diagram of machining 2 mounting holes ΦA on the machining center of the present invention;

[0017] Attached Figure 4 is a schematic diagram of fixture A of the present invention;

[0018] Attached Figure 5 is a side view schematic diagram of fixture A of the present invention;

[0019] Attached Figure 6 is a schematic diagram of fixture B of the present invention;

[0020] Attached Figure 7 is a side view schematic diagram of fixture B of the present invention;

[0021] Attached Figure 8 is the reticulated pattern processed by the present invention.

[0022] Reference numerals: 1 - fixture body, 2 - mounting plate, 3 - fixing pin, 4 - washer, 5 - hexagon nut, 6 - hexagon nut. Specific embodiments

[0023] The present invention will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present invention.

[0024] Embodiment of the present invention: A method for machining a reticulated pattern on the surface of a thin part, comprising the following steps,

[0025] Step (1), when loading and unloading on a shearing machine, control the length L and width B dimensions of each sheet within the specified range to meet the requirements of the blanking drawing.

[0026] Step (2), first fix more than 2 sheets together, and then drill and ream 2 - ΦA mounting holes on the machining center to ensure that the diameter dimensions, hole pitch dimensions LA, BA of the 2 - ΦA mounting holes on each sheet are within the specified range; use a special reamer when reaming the 2 - ΦA holes to ensure that the clearance between the 2 - ΦA mounting holes and the 2 positioning pins on the fixture is 0.005 - 0.015".

[0027] Step ⑶: First, use a dial indicator to align the B surface on fixture A on the wire-cutting equipment, and control the pointer variation within 0.01 mm. Then, fix the single-piece sheet on the threaded locating pin 6 on fixture A, and perform wire cutting on the B surface of the part outline drawing. When performing wire cutting, ensure that the straight knurling on the B surface of the part outline drawing meets the requirements of the straight knurling drawing and the knurling dimension drawing; the angles and dimensions shown in the knurling dimension drawing meet the knurling requirements of GB / T6403.3-2008.

[0028] Step ⑷: Use a dial indicator to align the B surface on fixture B on the wire-cutting equipment, and control the pointer variation within 0.01 mm. Then, fix the single-piece sheet on the threaded locating pin 6 on fixture B, with the surface having been wire-cut with straight knurling facing outward, and tighten the hexagon nut 5 to fix the single-piece sheet. When performing wire cutting, ensure that the knurling on the B surface of the part outline drawing meets the requirements of the knurling dimension drawing and the knurling drawing.

[0029] Step ⑸: Fix the single-piece sheet in the threaded locating pin 6 on the aligned fixture A, and perform wire cutting on the A surface of the part outline drawing. When performing wire cutting, ensure that the straight knurling on the A surface of the part outline drawing meets the requirements of the straight knurling drawing and the knurling dimension drawing.

[0030] Step ⑹: Fix the single-piece sheet on the threaded locating pin 6 on the aligned fixture B, with the surface having straight knurling facing outward, and tighten the hexagon nut 5 to fix the single-piece sheet. When performing wire cutting, ensure that the knurling on the A surface of the part outline drawing meets the requirements of the straight knurling drawing, the knurling dimension drawing, and the knurling drawing.

[0031] In the said step ⑵, when reaming the holes, ensure that the clearance between the two 2-ΦA mounting holes and the two locating pins on the fixture is 0.005 - 0.015 mm.

[0032] The said fixture A and fixture B are composed of a fixture body 1, a mounting plate 2, a fixing pin 3, a washer 4, a hexagon nut 5, and a threaded locating pin 6. A mounting plate 2 is provided on the fixture body 1, a fixing pin 3 is provided on the mounting plate 2, and the locating pin 6 is connected to the mounting plate 2 through the hexagon nut 5 and the washer 4. The locating pin 6 on fixture B is inclined. For example, the locating pin 6 on fixture B is inclined at 30°, which can meet the requirement of a knurling angle of 60°.

Claims

1. A method for machining reticulations on the surface of thin parts, characterized in that: It includes the following steps, Step (1), when loading and unloading on a shearing machine, control the length L and width B dimensions of each sheet within the specified range; Step (2), first fix more than 2 sheets together, and then drill and ream 2-ΦA mounting holes on a machining center, ensuring that the diameter dimensions, hole pitch dimensions LA, and BA of the 2-ΦA mounting holes on each sheet are within the specified range; Step (3), first use a dial indicator to align the B surface on fixture A on a wire cutting equipment, and control the pointer variation within 0.01 mm; then fix the single-piece sheet in the threaded locating pin (6) on fixture A, and perform wire cutting on the B surface of the part external contour drawing. When performing wire cutting, ensure that the straight reticulations processed on the B surface of the part external contour drawing meet the requirements of the straight reticulation drawing and the reticulation dimension drawing; Step (4), use a dial indicator to align the B surface on fixture B on a wire cutting equipment, and control the pointer variation within 0.01 mm; then fix the single-piece sheet on the threaded locating pin (6) on fixture B, and the side with the straight reticulations faces outward. Tighten the hexagon nut (5) to fix the single-piece sheet; when performing wire cutting, ensure that the reticulations processed on the B surface of the part external contour drawing meet the requirements of the reticulation dimension drawing and the reticulation drawing; Step (5), fix the single-piece sheet in the threaded locating pin (6) on the already aligned fixture A, and perform wire cutting on the A surface of the part external contour drawing. When performing wire cutting, ensure that the straight reticulations processed on the A surface of the part external contour drawing meet the requirements of the straight reticulation drawing and the reticulation dimension drawing; Step (6), fix the single-piece sheet on the threaded locating pin (6) on the already aligned fixture B, and the side with the straight reticulations faces outward. Tighten the hexagon nut (5) to fix the single-piece sheet; when performing wire cutting, ensure that the reticulations processed on the A surface of the part external contour drawing meet the requirements of the straight reticulation drawing, the reticulation dimension drawing, and the reticulation drawing.

2. The method for machining reticulations on the surface of thin parts according to claim 1, characterized in that: In the said step (2), when reaming the holes, ensure that the clearance between the 2-ΦA mounting holes and the 2 locating pins on the fixture is 0.005 - 0.015 mm for both.

3. The method for machining reticulations on the surface of thin parts according to claim 1, characterized in that: The structures of the said fixture A and fixture B include a fixture body (1), on which there is a mounting plate (2), on the mounting plate (2) there are fixed pins (3), the locating pin (6) is connected to the mounting plate (2) through a hexagon nut (5) and a washer (4), and the locating pin (6) on fixture B is inclined.

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