Linear cutting clamp suitable for thin-wall sheet metal part with notch and using method of linear cutting clamp

Abstract

A linear cutting clamp suitable for a thin-wall sheet metal part with a notch is used for carrying out linear cutting on a part body of the thin-wall sheet metal part with the notch and comprises an upper die, a lower die, a pressing block and a pressing plate, the bottom of the lower die penetrates into a die limiting groove formed in the upper end of the middle of the lower die, and the pressing block is arranged on the outer ring of the upper die. The outer end of the upper die is connected with the outer end of the lower die through abutting of the pressing block on the upper surface of the upper die, the pressing block is provided with a limiting screw vertically penetrating through the pressing block, the pressing plate is arranged above the die limiting groove, and the lower portion of the pressing plate penetrates into a part limiting groove formed in the upper end of the middle of the upper die. A fixing screw which vertically penetrates through the pressing plate and extends into the mold limiting groove is arranged above the pressing plate and sequentially penetrates through the pressing plate, the upper mold and the lower mold from top to bottom; in conclusion, the method has the advantages of being not prone to deformation, uniform in circumferential direct drop size, not prone to deviation of the notch position, high in repeated clamping and positioning precision and convenient to remove a remelting layer after linear cutting.

Description

Technical Field

[0001] The present invention belongs to the technical field of special processing of thin-walled sheet metal parts, and particularly relates to a wire cutting fixture applicable to thin-walled sheet metal parts with notches and a using method thereof. Background Art

[0002] In the processing and production of aviation equipment, various sheet metal parts are required. Most of the sheet metal parts are processed by turning and welding. The processing of conventional sheet metal parts is relatively simple. However, for some annular sheet metal parts, features such as circumferentially distributed round holes, waist-shaped holes, special-shaped holes, and notches need to be processed. However, sheet metal parts are prone to deformation themselves, and have the characteristics of the larger the diameter and the thinner the wall thickness. Therefore, the processing difficulty of these slots and holes will be significantly increased. When these special sheet metal parts are processed by turning, the sheet metal parts are prone to vibration and springback. Therefore, not only the cutting force should not be too large, but also the circumferential dimension consistency of the processed sheet metal parts will be poor, and the processing efficiency is not high. For some sheet metal parts with notches less than 0.5 mm, ordinary machining methods simply cannot process them, and special cutting processes such as wire cutting are required to process the sheet metal parts. In the wire cutting process of thin-walled sheet metal parts with notches, there are still many problems. It is necessary to ensure that the sheet metal parts do not deform and do not undergo axial displacement during the processing. Moreover, after cutting one notch, the angular position needs to be adjusted to ensure the correct relative position of each notch. When cutting the second notch, corresponding problems need to be handled, and so on. There is an urgent need to solve the technical problems encountered in the wire cutting process of thin-walled sheet metal parts with multiple notches.

[0003] The invention patent with the application number "202310872961.0" and the name "A Welding Positioning Tooling and Welding Method for a Thin-Walled Sheet Metal Assembly" mentions a welding positioning tooling and welding method for a thin-walled sheet metal assembly. The positioning tooling includes: a first positioning component; a second positioning component; a third positioning component; a fourth positioning component; a fifth positioning component. After the present invention disassembles the thin-walled sheet metal assembly into multiple groups of components and completes welding one by one, and then combines and welds the components, the problem of deformation of the key parts of the thin-walled sheet metal assembly due to welding stress is effectively avoided through the limitation of the positioning tooling. The overall welding processing accuracy is high, ensuring the welding quality of the thin-walled sheet metal assembly. However, it is not suitable for the wire cutting processing technology of thin-walled sheet metal parts with multiple notches, nor can it handle the technical problems of low processing accuracy caused by the deformation of sheet metal parts and notches.

[0004] Therefore, there is an urgent need for a wire cutting fixture applicable to thin-walled sheet metal parts with notches and a using method thereof to solve the technical problems encountered in the wire cutting process of existing thin-walled sheet metal parts with notches. Summary of the Invention

[0005] In view of this, the present invention provides a wire cutting fixture applicable to thin-walled sheet metal parts with notches and its usage method, which is applied to the special field of thin-walled sheet metal parts, and solves the technical problems existing in the current wire cutting fixture for thin-walled sheet metal parts with notches during use, such as easy deformation, uneven circumferential straight-down dimensions, easy deviation of the notch position, low repeat clamping and positioning accuracy, and inconvenience in removing the remelting layer after wire cutting.

[0006] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are as follows:

[0007] A wire cutting fixture applicable to thin-walled sheet metal parts with notches is used for wire cutting the part body of thin-walled sheet metal parts with notches, and includes an upper die, a lower die, a pressing block and a pressing plate. The bottom of the lower die extends into a die limiting groove arranged at the upper end of the middle position of the lower die. The pressing block is arranged on the outer circle of the upper die. There are two pressing blocks, and the two pressing blocks are symmetrically arranged horizontally about the central position of the upper die. The outer end of the upper die is connected to the outer end of the lower die by pressing the upper surface of the upper die with the pressing block. A limiting screw vertically passing through the pressing block is arranged on the pressing block. The limiting screw sequentially passes through the pressing block, the upper die and the lower die from top to bottom. The pressing plate is arranged above the die limiting groove. The lower part of the pressing plate extends into a part limiting groove arranged at the upper end of the middle position of the upper die. A fixing screw vertically passing through the pressing plate and extending into the die limiting groove is arranged above the pressing plate. The fixing screw sequentially passes through the pressing plate, the upper die and the lower die from top to bottom. A limiting cavity with an opening downward is arranged at the bottom of the lower die, and a fixing nut connected to the bottom of the fixing screw is arranged inside the limiting cavity.

[0008] Further, a plurality of evenly distributed and vertically extending indexing holes are arranged in the circumferential direction of the outer circle of the upper die, and a positioning hole with the same size as the indexing hole is arranged on the lower die. The positioning hole is vertically arranged below the indexing hole.

[0009] Further, a positioning pin is arranged inside the positioning hole. The upper end of the positioning pin passes through different positioning holes respectively when the upper die rotates horizontally to different positions, so as to fix the horizontal position of the upper die.

[0010] Further, the pressing plate is arranged at the bottom of the part limiting groove and is parallel to the bottom of the part limiting groove. There is a spacing between the outer end of the pressing plate and the inner side wall of the part limiting groove in the horizontal direction.

[0011] Further, the central position of the pressing plate is directly above the central position of the part limiting groove, and the fixing screw vertically passes through the central position of the pressing plate, the central position of the part limiting groove and the central position of the die limiting groove.

[0012] A usage method of a wire cutting fixture applicable to thin-walled sheet metal parts with notches includes the following steps:

[0013] S1. Fit the upper die and the lower die together.

[0014] S2. Use the limit screws to connect the two pressing blocks to the lower die, and then tighten them to ensure that the upper die can rotate.

[0015] S3. Fit the main body of the part against the bottom of the part limit groove of the upper die without clearance.

[0016] S4. Use the fixing screws to press and fit the pressing plate, the main body of the part, the upper die and the lower die together, and match and connect the bottom of the fixing screws with the fixing nuts inside the limit cavity.

[0017] S5. Align and clamp the assembled wire cutting fixture on the wire cutting machine tool.

[0018] S6. Wire cut the end face of the main body of the part along the end face line of the upper die.

[0019] S7. Insert the positioning pin into the indexing hole and the positioning hole of the lower die, cut the notch, and cut in sequence.

[0020] S8. After the processing is completed, clean and disassemble the parts, and wait for the next round of processing.

[0021] Further, in step S6, the left end face of the upper die is aligned with the end face line of the main body of the part for wire cutting the final dimension.

[0022] Further, in step S7, the cutting of the main body of the part is carried out by the slow wire cutting method.

[0023] Adopting the above technical solution, the present invention can also bring the following beneficial effects:

[0024] The present invention provides a carrier for processing the main body of the part through the connection of the upper die and the lower die, connects the upper die and the lower die through the pressing block, and can also ensure the rotation of the upper die. The main body of the part is fixed by the pressing plate, and the horizontal position of the main body of the part can be adjusted through the indexing hole and the positioning hole, so as to process the notches at different positions and ensure the uniform angular distribution of the notches. It is not only convenient for processing, and the cutting line will not affect the secondary processing, but also has high processing accuracy. After processing, it can avoid generating a relatively thick remelting layer, and the overall dimension will not exceed 0.1 mm within the qualified range. Moreover, other annular parts with angularly distributed grooves, holes, notches, etc. can also be used after modifying the clamping method. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is Figure 1 a top view of;

[0028] Figure 3 is a schematic structural diagram of a thin-walled sheet metal part with a notch.

[0029] Wherein: 1. upper die; 2. lower die; 3. pressing block; 4. pressing plate; 5. die limiting groove; 6. limiting screw; 7. part limiting groove; 8. fixing screw; 9. fixing nut; 10. indexing hole; 11. positioning hole; 12. positioning pin; 13. limiting cavity. Specific embodiments

[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present invention, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0033] It should also be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present invention. The diagrams only show the components related to the present invention, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0034] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0035] In one embodiment of the present invention, as Figures 1 to 3 shown, a wire cutting fixture applicable to a thin-walled sheet metal part with a notch is used for wire cutting the part body of the thin-walled sheet metal part with a notch. The height of the part body is 6.25 mm, the wall thickness of the part body is 0.2 mm, and there are 50 notches distributed on the part body. The width of the notch is 0.5 mm. It includes an upper die 1, a lower die 2, a pressing block 3 and a pressing plate 4. The bottom of the lower die 2 extends into a die limit groove 5 arranged at the upper end of the middle position of the lower die 2. The pressing block 3 is arranged on the outer circle of the upper die 1. There are two pressing blocks 3, and the two pressing blocks 3 are horizontally symmetrically arranged about the central position of the upper die 1. The outer end of the upper die 1 is connected to the outer end of the lower die 2 by pressing the upper surface of the upper die 1 by the pressing block 3. A limit screw 6 vertically passing through the pressing block 3 is arranged on the pressing block 3. The limit screw 6 passes through the pressing block 3, the upper die 1 and the lower die 2 from top to bottom in sequence. The pressing plate 4 is arranged above the die limit groove 5. The lower part of the pressing plate 4 extends into a part limit groove 7 arranged at the upper end of the middle position of the upper die 1. A fixing screw 8 vertically passing through the pressing plate 4 and extending into the interior of the die limit groove 5 is arranged above the pressing plate 4. The fixing screw 8 passes through the pressing plate 4, the upper die 1 and the lower die 2 from top to bottom in sequence. The bottom of the lower die 2 is provided with a limit cavity 13 with an opening downward. A fixing nut 9 connected to the bottom of the fixing screw 8 is arranged inside the limit cavity 13.

[0036] A plurality of uniformly distributed and vertically extending indexing holes 10 are arranged in the circumferential direction of the outer circle of the upper die 1. A positioning hole 11 of the same size as the indexing hole 10 is arranged on the lower die 2. The positioning hole 11 is vertically arranged below the indexing hole 10; a positioning pin 12 is arranged inside the positioning hole 11. The upper end of the positioning pin 12 passes through different positioning holes 11 respectively when the upper die 1 rotates horizontally to different positions, so as to fix the horizontal position of the upper die 1.

[0037] The pressing plate 4 is arranged at the bottom of the part limiting groove 7 and is parallel to the bottom of the part limiting groove 7. There is a spacing between the outer end of the pressing plate 4 and the inner side wall of the part limiting groove 7 in the horizontal direction; the central position of the pressing plate 4 is directly above the central position of the part limiting groove 7, and the fixing screw 8 vertically passes through the central positions of the pressing plate 4, the part limiting groove 7 and the die limiting groove 5.

[0038] A method for using a wire cutting fixture applicable to a thin-walled sheet metal part with a notch includes the following steps:

[0039] S1. Fit the upper die 1 with the lower die 2;

[0040] S2. Use the limit screw 6 to connect the two pressing blocks 3 with the lower die 2, and then tighten to ensure that the upper die 1 can rotate;

[0041] S3. Fit the part main body with the bottom of the part limiting groove 7 of the upper die 1 without clearance;

[0042] S4. Use the fixing screw 8 to press and fit the pressing plate 4, the part main body, the upper die 1 and the lower die 2 together, and match and connect the bottom of the fixing screw 8 with the fixing nut 9 inside the limit cavity 13;

[0043] S5. Align and clamp the assembled wire cutting fixture on the wire cutting machine tool;

[0044] S6. Wire cut the end face of the part main body along the end face line of the upper die 1;

[0045] S7. Insert the positioning pin 12 into the indexing hole 10 and the positioning hole 11 of the lower die 2, cut the notch, and cut in sequence. When machining the notch, it is necessary to ensure that the part does not deform and does not undergo axial displacement. At the same time, after cutting one notch, it is necessary to adjust the angular position to ensure the correct relative position of each notch, cut the second notch, and so on;

[0046] S8. After the machining is completed, clean and disassemble the parts and wait for the next round of machining.

[0047] In step S6, the left end face of the upper die 1 is directly opposite to the end face line of the part main body for wire cutting the final dimension. In step S7, the wire cutting of the part main body is carried out by using the slow wire cutting method. In general, the present invention has the advantages of not being easily deformed, having uniform circumferential straight-down dimensions, not being easily deviated from the notch position, having high repeat clamping and positioning accuracy, and being convenient for removing the remelting layer after wire cutting.

[0048] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A wire cutting fixture applicable to thin-walled sheet metal parts with notches, used for wire cutting the part body of thin-walled sheet metal parts with notches, and characterized in that: It includes an upper die (1), a lower die (2), a pressing block (3) and a pressing plate (4). The bottom of the lower die (2) extends into a die limiting groove (5) located at the upper end of the middle position of the lower die (2). The pressing block (3) is arranged on the outer circle of the upper die (1). By pressing the upper surface of the upper die (1) with the pressing block (3), the outer end of the upper die (1) is connected to the outer end of the lower die (2). A limiting screw (6) vertically passing through the pressing block (3) is arranged on the pressing block (3). The limiting screw (6) sequentially passes through the pressing block (3), the upper die (1) and the lower die (2) from top to bottom. The pressing plate (4) is arranged above the die limiting groove (5). The lower part of the pressing plate (4) extends into a part limiting groove (7) located at the upper end of the middle position of the upper die (1). A fixing screw (8) vertically passing through the pressing plate (4) and extending into the interior of the die limiting groove (5) is arranged above the pressing plate (4). The fixing screw (8) sequentially passes through the pressing plate (4), the upper die (1) and the lower die (2) from top to bottom. A limiting cavity (13) with an opening downward is arranged at the bottom of the lower die (2). A fixing nut (9) connected to the bottom of the fixing screw (8) is arranged inside the limiting cavity (13).

2. The wire cutting fixture applicable to the notched thin-walled sheet metal part according to claim 1, wherein: A plurality of uniformly distributed and vertically extending indexing holes (10) are arranged in the circumferential direction of the outer circle of the upper die (1). A positioning hole (11) having the same size as the indexing hole (10) is arranged on the lower die (2). The positioning hole (11) is vertically arranged below the indexing hole (10).

3. The wire cutting fixture for a notched thin-walled sheet metal part according to claim 2, characterized in that: A positioning pin (12) is arranged inside the positioning hole (11). The upper end of the positioning pin (12) respectively passes through different positioning holes (11) when the upper die (1) horizontally rotates to different positions, thereby fixing the horizontal position of the upper die (1).

4. A wire cutting fixture applicable to notched thin-walled sheet metal parts according to claim 3, characterized in that: The pressing plate (4) is arranged at the bottom of the part limiting groove (7) and is parallel to the bottom of the part limiting groove (7). There is a spacing between the outer end of the pressing plate (4) and the inner side wall of the part limiting groove (7) in the horizontal direction.

5. A wire cutting fixture applicable to a thin-walled sheet metal part with a notch according to claim 4, characterized in that: The central position of the pressing plate (4) is directly above the central position of the part limiting groove (7). The fixing screw (8) vertically passes through the central position of the pressing plate (4), the central position of the part limiting groove (7) and the central position of the die limiting groove (5).

6. The usage method of a wire cutting fixture applicable to a thin-walled sheet metal part with a notch as claimed in claim 5, characterized in that, It includes the following steps: S1. Fit the upper die (1) and the lower die (2). S2. Connect the two pressing blocks (3) to the lower die (2) using the limiting screws (6), and then tighten them to ensure that the upper die (1) can rotate. S3. Fit the main body of the part to the bottom of the part limiting groove (7) of the upper die (1) without gaps. S4. Use the fixing screw (8) to press and fit the pressing plate (4), the main body of the part, the upper die (1) and the lower die (2) together, and match and connect the bottom of the fixing screw (8) with the fixing nut (9) inside the limiting cavity (13). S5. Align and clamp the assembled wire cutting fixture on the wire cutting machine tool. S6. Wire cut the end face of the main body of the part along the end face of the upper die (1). S7. Insert the positioning pin (12) into the indexing hole (10) and the positioning hole (11) of the lower die (2), cut the notch, and cut in sequence. S8. After processing is completed, clean and disassemble the parts, and wait for the next round of processing.

7. The usage method of a wire cutting fixture applicable to a thin-walled sheet metal part with a notch according to claim 6, characterized in that: In step S6, the left end face of the upper die (1) is aligned with the end face of the part body for wire cutting of the final dimension.

8. The method of using a wire cutting fixture applicable to a thin-walled sheet metal part with a notch according to claim 6, characterized in that: In step S7, the part body is cut by using a slow wire cutting method.

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