Method suitable for internal bending machining of non-standard sheet metal part

Abstract

The method comprises the following steps that firstly, a process edge is designed on a drawing by using a computer around the non-standard sheet metal part, the outer contour line of the process edge comprises a plurality of positioning straight lines, each positioning straight line corresponds to at least one bending part, and the bending part is formed by bending the non-standard sheet metal part; an isolation groove is formed between the process edge and the non-standard sheet metal part body, and a connecting column is arranged in the isolation groove; then, a laser cutting machine is used for cutting the structure of the non-standard sheet metal part body and corresponding process edges and isolation grooves according to the design of the drawing; then, the cut non-standard sheet metal part is placed on a bending machine to be bent; and finally, after all the bent parts are machined, the connecting columns are cut off through a cutter, the cut-off positions are polished to be smooth after the technological edges are removed, and a finished product of the non-standard sheet metal part is obtained. By means of the mode, on the premise that the precision is guaranteed, the inner bending machining step can be conveniently and rapidly completed, and the machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sheet metal processing, in particular to a method suitable for inner bending processing of non-standard sheet metal parts. BACKGROUND

[0002] The semiconductor processing equipment is usually custom processing, and the equipment often involves multiple non-standard sheet metal parts. Some of the bending parts in the non-standard sheet metal parts are located inside the parts. Since the outline of the parts is not regular enough, it is difficult to position directly using a bending machine, and the processing is troublesome. Therefore, for such parts that need to be bent inward, the conventional method is to use a punch press or to use a laser to mark a line and then manually bend. When using a punch press, a corresponding die needs to be designed. However, the number of non-standard parts required is usually small, and one die is often used for one machine, which cannot form a scale effect, and therefore the cost is too high. Although using a laser to mark a line and then manually bending is flexible and low in cost, the bending size is often uneven, the error rate is high, and the speed is slow, which not only cannot meet the overall precision requirement but also affects the product processing efficiency. SUMMARY

[0003] The technical problem solved by the present application is to provide a method suitable for inner bending processing of non-standard sheet metal parts, which can meet the requirements of inner bending processing of non-standard parts.

[0004] To solve the above technical problems, one technical solution adopted by the present application is to provide a method suitable for inner bending processing of non-standard sheet metal parts, which comprises the following steps: Firstly, a computer is used to design a process edge around the non-standard sheet metal part on a drawing. The outer contour line of the process edge includes a plurality of positioning straight lines. Each positioning straight line will form a positioning surface matched with the positioning block after cutting. Each positioning surface corresponds to at least one bending part, and a separation groove is arranged between the process edge and the body of the non-standard sheet metal part. A plurality of connecting columns connecting the body of the non-standard sheet metal part and the process edge are arranged in the separation groove. Secondly, a laser cutting machine is used to cut the structure of the non-standard sheet metal part and the corresponding process edge and separation groove according to the design of the drawing. Thirdly, the cut non-standard sheet metal part is placed on a bending machine, the positioning surface formed along the positioning straight line is matched with the positioning block on the bending machine, and then the bending part corresponding to the positioning surface is bent. After the processing of one bending part is completed, another positioning surface is switched to process another bending part. Fourthly, after the processing of all the bending parts is completed, the connecting columns are cut off using a cutter, and the cutting position is polished smooth after the process edge is removed to obtain the finished product of the non-standard sheet metal part.

[0005] In a preferred embodiment of the present application, the bending line of the bending part is perpendicular to the corresponding positioning straight line or parallel to the corresponding positioning straight line.

[0006] In a preferred embodiment of the present application, the length of the positioning straight line is not less than 10 mm.

[0007] In a preferred embodiment of the present application, the width of the isolation groove is 2-3 mm.

[0008] In a preferred embodiment of the present application, the width of the connecting column is 1-2 mm.

[0009] In a preferred embodiment of the present application, the distance between any two adjacent connecting columns is 20-50 mm.

[0010] The present application has the following advantages: through further optimization of the inner bending process of the non-standard sheet metal part, a positioning surface is arranged outside the sheet metal part to be processed by setting a process edge, so that the positioning surface is attached to the positioning block on the bending machine, thereby processing the inner bending part at the corresponding position inside the sheet metal part. Compared with the common punching process, the non-standard sheet metal part is bent and processed without the need to design a special punching die, the cost is significantly reduced, the bending size precision is high, the efficiency is fast, and the requirements of high-precision semiconductor equipment installation can be met. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a non-standard part processing structure schematic diagram in a preferred embodiment of the present application; Figure 2 is a non-standard part structure schematic diagram in Figure 1 ; The marks of the components in the drawings are as follows: 1. Non-standard sheet metal part, 2. Process edge, 3. Positioning surface, 4. Isolation groove, 5. Connecting column, 6. Bending part. DETAILED DESCRIPTION

[0012] The preferred embodiments of the present application will be described in detail below with reference to the drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly and explicitly defined.

[0013] Please refer to Figure 1 and Figure 2 , the embodiment content of the present application includes: As Figure 2 shown, a non-standard sheet metal part 1 with a whole profile of an annular shape, made of stainless steel, has an outer diameter of about 81 mm, and 12 bending parts 6 are arranged on the non-standard sheet metal part 1. The method for inner bending processing of the non-standard sheet metal part 1 includes the following steps: First step, using computer to design process edge 2 around the non-standard sheet metal part 1 on CAD drawing, the circumscribed circle diameter of the process edge 2 is 94mm, the external contour of the process edge 2 is a regular 12-gon composed of 12 positioning straight lines matching the positioning blocks on the bending machine, each positioning straight line will form a positioning surface 3 after cutting, each positioning surface 3 corresponds to a bending part, and is perpendicular to the bending line of the bending part 3, and a separation groove 4 is arranged between the process edge 2 and the non-standard sheet metal part 1 body, the width of the separation groove 4 is about 2mm, 8 connecting columns 5 are evenly arranged in the separation groove 4 to connect the non-standard sheet metal part 1 body and the process edge 2, the width of each connecting column 5 is 2mm, and the distance between adjacent connecting columns 5 is about 32mm; Second step, using laser cutting machine to cut the structure of the non-standard sheet metal part 1 body and the corresponding process edge 2 and separation groove 4 according to the design requirements of the drawing; Third step, placing the non-standard sheet metal part 1 after cutting on the bending machine, attaching one positioning surface 3 cut along the positioning straight line to the positioning block on the bending machine, and then bending the bending part 6 corresponding to the positioning surface 3, after one bending part 6 is processed, switching to another positioning surface 3 to continue processing another bending part 6; Fourth step, after all the bending parts 6 are processed, using a cutter to cut off the connecting columns 5, polishing the cutting position after removing the process edge 2 to obtain the finished product of the non-standard sheet metal part 1.

[0014] In this way, all the bending parts 6 on the non-standard sheet metal part 1 can be quickly and sequentially processed, which is not only fast and convenient, but also has high processing precision, and the cost is significantly reduced compared with the bending of the punch.

[0015] In actual design, the bending lines of the bending parts 6 of different non-standard sheet metal parts 1 are perpendicular or parallel to the corresponding positioning straight lines. Because the positioning straight lines are selected to be perpendicular and parallel, when the positioning surface 3 formed by the positioning straight lines is attached to the positioning block, the bending machine is more convenient to operate the bending part 6, otherwise there is an angle between them, which is easy to slide along the positioning surface during operation, causing misalignment and affecting the processing precision.

[0016] When designing the process edge 2, the length of the positioning straight line is generally not less than 10mm. In this embodiment, the length of the positioning straight line is about 24mm, if the positioning straight line is too short, it is easy to be unstable during operation after positioning, resulting in unqualified bending size.

[0017] In actual design, the width of the isolation groove 4 is 2-3 mm, the width of the connecting column 5 is 1-2 mm, and the distance between any two adjacent connecting columns 5 is at least 30 mm apart. In this embodiment, the width of the isolation groove 4 is 2 mm, the width of the connecting column 5 is also 2 mm, and the distance between any two adjacent connecting columns 5 is about 32 mm. The reason for the above structural requirements is that if the isolation groove 2 is too narrow, it is not conducive for the cutter to enter during subsequent cutting, and if the width is too large, it affects the stability after positioning, and if the distance between the connecting columns 5 is too small, it is not convenient for the subsequent cutting action, but if it is too large, it will also affect the stability of positioning during bending. The requirement that the width of the connecting column 5 is 1-2 mm is also to make it as fine as possible to facilitate the cutting step after bending on the basis of ensuring the structural strength during processing.

[0018] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent flow transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A method suitable for bending inside a non-standard sheet metal part, characterized in that, The method suitable for the inner bending processing of non-standard sheet metal parts comprises the following steps: In the first step, a process edge is designed around the non-standard sheet metal part on a drawing by using a computer, the outer contour line of the process edge comprises a plurality of positioning straight lines, each positioning straight line will form a positioning surface matched with the positioning block after cutting, each positioning surface corresponds to at least one bending part, and a separation groove is arranged between the process edge and the non-standard sheet metal part body, a plurality of connecting columns connecting the non-standard sheet metal part body and the process edge are arranged in the separation groove; In the second step, the structure of the non-standard sheet metal part body and the corresponding process edge and separation groove are cut according to the design of the drawing by using a laser cutting machine; In the third step, the non-standard sheet metal part after cutting is placed on a bending machine, the positioning surface formed along the positioning straight line is matched with the positioning block on the bending machine, then the bending part corresponding to the positioning surface is bent, after the bending of one bending part is completed, another positioning surface is switched to continue the bending of another bending part; In the fourth step, after the bending of all the bending parts is completed, the connecting columns are cut off by using a cutter, the process edge is removed, the cutting position is polished to obtain the finished product of the non-standard sheet metal part. The bending line of the bending part is perpendicular to or parallel to the corresponding positioning straight line.

2. The method according to claim 1, wherein, The length of the positioning straight line is not less than 10 mm.

3. The method according to claim 1, wherein, The width of the separation groove is 2-3 mm.

4. The method for non-marked sheet metal part inner bending processing according to claim 1, characterized in that, The width of the connecting column is 1-2 mm.

5. The method for non-marked sheet metal part inner bending processing according to claim 1, characterized in that, The distance between any two adjacent connecting columns is 20-50 mm.

6. The method for non-marked sheet metal part inner bending processing according to claim 1, characterized in that, ​

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