A shrapnel bending die

Abstract

The present invention discloses a shrapnel bending die, belonging to the technical field of machining. The bending die includes a female die, a male die and a positioning member. A positioning hole A and a forming groove are provided on the female die. A positioning hole B is provided on the male die at a position corresponding to the positioning hole A, and a forming pressing block is provided on the male die at a position corresponding to the forming groove. One end of the positioning member can be inserted into the positioning hole A, and the other end can be inserted into the positioning hole B. The shrapnel blank is placed between the female die and the male die, and the female die, the male die and the shrapnel blank are positioned by the positioning member. Then, the bending die equipped with the shrapnel blank is installed in a vise and pressure is applied to form the shrapnel. The shrapnel can be formed by one clamping, ensuring the processing efficiency of the shrapnel.

Description

Technical Field

[0001] The present invention relates to a shrapnel bending die, belonging to the technical field of machining. Background Art

[0002] The structure of the shrapnel is as shown in Figure 1 and Figure 2 The shrapnel includes a flat plate and a groove. Two through holes with a diameter of φ3.4 are machined on the flat plate. One end of the groove is connected to the flat plate. The bottom surface of the groove is inclined downward by 8° relative to the flat plate. The included angle between the two side plates of the groove is 18°, and the two side plates are symmetric with respect to the center line of the groove. The depth of the groove is 0.6 mm. At the same time, it is necessary to ensure that the size of the bending position of the bottom surface of the folded groove is 1 mm. The developed view of the shrapnel or the structure of the shrapnel blank is as shown in Figure 3 shown.

[0003] The Chinese patent document with the publication number of CN110802172A discloses a compression spring sheet bending die, which includes an upper die and a lower die. A concave plane B and a concave inclined plane D lower than the concave plane B and inclined downward are provided at the upper end of the lower die. The concave inclined plane D is connected to the concave plane B through a transition inclined plane C. A first inclined plane A is connected to the outside of the concave plane B, and a second inclined plane E is connected to the outside of the concave inclined plane D. The included angles between the first inclined plane A and the concave plane B and between the transition inclined plane C and the concave inclined plane D are both α. The included angles between the concave plane B and the transition inclined plane C and between the concave inclined plane D and the second inclined plane E are both β. The upper die is provided with a bottom surface that cooperates with the lower die; a positioning pin is provided at the concave plane B of the lower die, and a pin hole corresponding to the positioning pin is provided on the upper die. The compression spring sheet can be formed by one stamping, with low labor intensity of the operator and high production efficiency.

[0004] Using this bending die, the bottom surface of the groove on the shrapnel can be bent and formed, ensuring that the angle size of the bottom surface of the groove is inclined downward by 8° relative to the flat plate. However, the two side plates of the groove still need to be bent and formed by other dies. Multiple clamping and bending result in low processing efficiency of the shrapnel. Therefore, how to process the shrapnel into a formed shape in one clamping to ensure the processing efficiency of the shrapnel is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a shrapnel bending die.

[0006] The present invention is achieved through the following technical solutions:

[0007] A shrapnel bending die includes a female die, a male die and a positioning member. A positioning hole A and a forming groove are provided on the female die. A positioning hole B is provided on the male die at a position corresponding to the positioning hole A, and a forming pressing block is provided on the male die at a position corresponding to the forming groove. One end of the positioning member can be inserted into the positioning hole A, and the other end can be inserted into the positioning hole B.

[0008] The female mold includes a positioning spacer and a forming spacer. One end of the forming spacer is connected to one end of the positioning spacer. The bottom surface of the forming spacer is coplanar with the bottom surface of the positioning spacer, and the thickness of the forming spacer is greater than that of the positioning spacer. The positioning hole A is provided on the positioning spacer, and the forming groove is opened on the forming spacer.

[0009] There are two positioning holes A on the positioning spacer.

[0010] The positioning hole A is a counterbore.

[0011] The forming groove includes a support groove opened at the top of the forming spacer, and a forming groove is opened at the bottom of the support groove.

[0012] Both the support groove and the forming groove are isosceles trapezoids. The support groove is located above the positioning spacer, and the bottom surface of the support groove is parallel to the top surface of the positioning spacer. One end of the bottom surface of the forming groove is connected to the top surface of the positioning spacer, and the bottom surface of the forming groove is inclined downward relative to the top surface of the positioning spacer.

[0013] The male mold includes a positioning press block. One end of the forming press block is connected to the positioning press block. There are two positioning holes B on the positioning press block.

[0014] The forming press block includes a support block and a forming block. One end of the support block is connected to the positioning press block. The top surface of the support block is coplanar with the top surface of the positioning press block, and the thickness of the support block is smaller than that of the positioning press block. The forming block is provided on the support block. One end of the bottom surface of the forming block is connected to the bottom surface of the positioning press block, and the bottom surface of the forming block is inclined downward relative to the bottom surface of the positioning press block.

[0015] Both the support block and the forming block are isosceles trapezoids.

[0016] The shrapnel bending die includes two positioning members. One positioning member is a cylindrical pin, and the diameter of the middle part of the cylindrical pin is larger than that of the two ends. The other positioning member is a diamond pin, and the diameter of the middle part of the diamond pin is larger than that of the two ends.

[0017] The beneficial effect of the present invention is that: place the shrapnel blank between the female mold and the male mold, and position the female mold, the male mold and the shrapnel blank through the positioning members. Then, place the bending die with the shrapnel blank into the vise and apply pressure to form the shrapnel. The shrapnel can be formed in one clamping, ensuring the processing efficiency of the shrapnel. Description of the Drawings

[0018] Figure 1 It is a front view structural schematic diagram of the shrapnel;

[0019] Figure 2 is Figure 1 a cross-sectional view of;

[0020] Figure 3 It is a developed view of the shrapnel;

[0021] Figure 4 is a schematic structural diagram of the present invention;

[0022] Figure 5 is Figure 4 a stepped sectional view along A-A;

[0023] Figure 6 is a schematic front view structure diagram of the female mold of the present invention;

[0024] Figure 7 is Figure 6 a schematic left view structure diagram of

[0025] Figure 8 is Figure 6 a stepped sectional view along B-B;

[0026] Figure 9 is a schematic front view structure diagram of the male mold of the present invention;

[0027] Figure 10 is Figure 9 a schematic top view structure diagram of

[0028] Figure 11 is Figure 9 a schematic left view structure diagram of

[0029] Figure 12 is a schematic structure diagram of the cylindrical pin of the present invention;

[0030] Figure 13 is a schematic front view structure diagram of the diamond pin of the present invention;

[0031] Figure 14 is Figure 13 a schematic left view structure diagram of.

[0032] In the figure: 1 - female mold, 10 - positioning cushion block, 100 - positioning hole A, 11 - forming cushion block, 110 - support groove, 111 - forming groove, 2 - male mold, 20 - positioning pressing block, 200 - positioning hole B, 21 - support block, 22 - forming block, 3 - cylindrical pin, 4 - diamond pin. Detailed implementation manners

[0033] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0034] Such as Figures 1 to 14As shown in the figure, a shrapnel bending die according to the present invention includes a female die 1, a male die 2 and a positioning member. A positioning hole A100 and a forming groove are machined on the female die 1. A positioning hole B200 is machined on the male die 2 at a position corresponding to the positioning hole A100, and a forming pressing block is provided on the male die 2 at a position corresponding to the forming groove. One end of the positioning member can be inserted into the positioning hole A100, and the other end can be inserted into the positioning hole B200. When in use, first insert the lower end of the positioning member into the positioning hole A100 on the female die 1, then place the shrapnel blank on the female die 1, and make the positioning member pass through the φ3.4 through hole on the shrapnel blank (as Figure 3 shown), then place the male die 2 on the shrapnel blank, and make the upper end of the positioning member pass through the positioning hole B200 on the male die 2, so as to position the female die 1, the shrapnel blank and the male die 2 through the positioning member. Finally, install the three into a vise and apply pressure to form the shrapnel. The shrapnel can be formed in one clamping, ensuring the processing efficiency of the shrapnel.

[0035] The female die 1 includes a positioning cushion block 10 and a forming cushion block 11. One end of the forming cushion block 11 is connected to one end of the positioning cushion block 10. The bottom surface of the forming cushion block 11 is coplanar with the bottom surface of the positioning cushion block 10, and the thickness of the forming cushion block 11 is greater than the thickness of the positioning cushion block 10. The positioning hole A100 is machined on the positioning cushion block 10, and the forming groove is opened on the forming cushion block 11.

[0036] Two positioning holes A100 are machined on the positioning cushion block 10.

[0037] The positioning hole A100 is a countersunk hole.

[0038] The forming groove includes a support groove 110 opened at the top of the forming cushion block 11, and a forming groove 111 is opened at the bottom of the support groove 110.

[0039] The support groove 110 and the forming groove 111 are both isosceles trapezoids. The support groove 110 is located above the positioning cushion block 10, and the bottom surface of the support groove 110 is parallel to the top surface of the positioning cushion block 10. One end of the bottom surface of the forming groove 111 is connected to the top surface of the positioning cushion block 10, and the bottom surface of the forming groove 111 is inclined downward relative to the top surface of the positioning cushion block 10. During use, the center lines of the support groove 110 and the forming groove 111 coincide. The bottom surface of the support groove 110 is used to support the shrapnel blank before processing, and the forming groove 111 is used to cooperate with the forming block 22 to form the shrapnel. The bottom surface of the forming groove 111 is inclined downward at an angle β relative to the top surface of the positioning cushion block 10, and β = 8°; the included angle between the two side walls of the forming groove 111 is α, and α = 18°; after positioning the female mold 1 and the shrapnel blank, the relative position between the shrapnel blank and the forming groove 111 is used to ensure the processing dimension of the groove depth of 0.6 mm on the formed shrapnel; by controlling the distance between the connecting line of the bottom surface of the forming groove 111 and the top surface of the positioning cushion block 10 and the connecting line of the center points of the two positioning holes A100, the bending position dimension of 1 mm of the bottom surface of the groove on the shrapnel is ensured.

[0040] The male mold 2 includes a positioning pressing block 20. One end of the forming pressing block is connected to the positioning pressing block 20, and two positioning holes B200 are machined on the positioning pressing block 20.

[0041] The forming pressing block includes a support block 21 and a forming block 22. One end of the support block 21 is connected to the positioning pressing block 20. The top surface of the support block 21 is coplanar with the top surface of the positioning pressing block 20, and the thickness of the support block 21 is smaller than the thickness of the positioning pressing block 20. The forming block 22 is arranged on the support block 21. One end of the bottom surface of the forming block 22 is connected to the bottom surface of the positioning pressing block 20, and the bottom surface of the forming block 22 is inclined downward relative to the bottom surface of the positioning pressing block 20. During use, the bottom surface of the forming block 22 is inclined downward at an angle β relative to the bottom surface of the positioning pressing block 20, and β = 8°.

[0042] Both the support block 21 and the forming block 22 are isosceles trapezoids. During use, the center lines of the support block 21 and the forming block 22 coincide, and the width of the support block 21 is larger than the width of the forming block 22. The included angle between the two side surfaces of the forming block 22 is α, and α = 18°.

[0043] The shrapnel bending die of the present invention includes two positioning members. One positioning member is a cylindrical pin 3, and the diameter of the middle part of the cylindrical pin 3 is larger than the diameters of both ends. The other positioning member is a diamond pin 4, and the diameter of the middle part of the diamond pin 4 is larger than the diameters of both ends. One positioning member is a cylindrical pin 3, and the other positioning member is a diamond pin 4. Positioning is carried out by the contact between the diamond segment on the diamond pin 4 and the inner surface of the positioning hole B200 on the male mold 2 to avoid over-positioning.

[0044] The working principle or the using process of the shrapnel bending die of the present invention is as follows:

[0045] Insert the lower ends of the cylindrical pin 3 and the diamond pin 4 into the two positioning holes A100 on the female mold 1 correspondingly, so that the upper ends of the cylindrical pin 3 and the diamond pin 4 pass through the two φ3.4 through holes on the shrapnel blank correspondingly, and then push down the shrapnel blank to make it contact with the bottom surface of the support groove 110, so that the upper ends of the cylindrical pin 3 and the diamond pin 4 penetrate into the positioning holes B200 on the male mold 2 correspondingly. Then, install the bending die with the shrapnel blank in the vise and apply pressure to form the shrapnel. The shrapnel can be formed in one clamping, ensuring the processing efficiency of the shrapnel.

Claims

1. A shrapnel bending die, characterized in that: It includes a female mold (1), a male mold (2) and a positioning member. A positioning hole A (100) and a forming groove are provided on the female mold (1). A positioning hole B (200) is provided on the male mold (2) at a position corresponding to the positioning hole A (100), and a forming pressing block is provided on the male mold (2) at a position corresponding to the forming groove. One end of the positioning member can be inserted into the positioning hole A (100), and the other end can be inserted into the positioning hole B (200). The female mold (1) includes a positioning cushion block (10) and a forming cushion block (11). One end of the forming cushion block (11) is connected to one end of the positioning cushion block (10). The bottom surface of the forming cushion block (11) is coplanar with the bottom surface of the positioning cushion block (10), and the thickness of the forming cushion block (11) is greater than the thickness of the positioning cushion block (10). The positioning hole A (100) is provided on the positioning cushion block (10), and the forming groove is provided on the forming cushion block (11). The forming groove includes a support groove (110) opened at the top of the forming cushion block (11), and a forming groove (111) is opened at the bottom of the support groove (110). Both the support groove (110) and the forming groove (111) are isosceles trapezoids. The support groove (110) is located above the positioning cushion block (10), and the bottom surface of the support groove (110) is parallel to the top surface of the positioning cushion block (10). One end of the bottom surface of the forming groove (111) is connected to the top surface of the positioning cushion block (10), and the bottom surface of the forming groove (111) is inclined downward relative to the top surface of the positioning cushion block (10). The forming pressing block includes a support block (21) and a forming block (22). One end of the support block (21) is connected to the positioning pressing block (20). The top surface of the support block (21) is coplanar with the top surface of the positioning pressing block (20), and the thickness of the support block (21) is smaller than the thickness of the positioning pressing block (20). The forming block (22) is provided on the support block (21). One end of the bottom surface of the forming block (22) is connected to the bottom surface of the positioning pressing block (20), and the bottom surface of the forming block (22) is inclined downward relative to the bottom surface of the positioning pressing block (20). The shrapnel bending die includes two positioning members. One positioning member is a cylindrical pin (3), and the diameter of the middle part of the cylindrical pin (3) is larger than that of both ends. The other positioning member is a diamond pin (4), and the diameter of the middle part of the diamond pin (4) is larger than that of both ends. Insert the lower ends of the cylindrical pin (3) and the diamond pin (4) into the two positioning holes A (100) on the female mold (1) correspondingly, so that the upper ends of the cylindrical pin (3) and the diamond pin (4) pass through the two φ3.4 through holes on the shrapnel blank correspondingly, and push the shrapnel blank downward to make it contact with the bottom surface of the support groove (110), so that the upper ends of the cylindrical pin (3) and the diamond pin (4) penetrate into the positioning holes B (200) on the male mold (2) correspondingly. Then, place the bending die with the shrapnel blank in the vise and apply pressure to form the shrapnel.

2. The shrapnel bending die according to claim 1, characterized in that: Two positioning holes A (100) are provided on the positioning cushion block (10).

3. The shrapnel bending die according to claim 1, characterized in that: The positioning hole A (100) is a countersunk hole.

4. The shrapnel bending die according to claim 1, characterized in that: The male mold (2) includes a positioning press block (20), and one end of the forming press block is connected to the positioning press block (20); two positioning holes B (200) are provided on the positioning press block (20).

5. The shrapnel bending die according to claim 1, characterized in that: Both the support block (21) and the forming block (22) are isosceles trapezoids.

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