A forming die for a multi-bending part

Abstract

The present invention discloses a multi-bending part forming die, including a positioning plate B installed at the top of the concave die insert, a main pushing block that can be lifted and slidably installed in the concave die insert, a movable punch A corresponding to the main pushing block; a fixed punch slidably installed relative to the movable punch A, and the main pushing block has a through groove for the fixed punch to penetrate; a positioning pushing block that can be lifted and slidably installed in the main pushing block, a movable punch B corresponding to the positioning pushing block for telescopic movement, a right slider that can be telescopically and slidably installed in the movable punch B, and a left slider that can be telescopically and slidably installed in the concave die insert. When the movable punch B descends to press the positioning pushing block to descend in the main pushing block, it simultaneously drives the right slider and the left slider to slide. The right slider slides in the movable punch B towards the rear leg of the conductive part to form the rear leg, and the left slider slides in the concave die insert towards the front leg of the conductive part to form the front leg, realizing the simultaneous bending and forming of the front leg and the rear leg of the conductive part, and solving the problem that the angle formed in the previous bending process is easily damaged in the next bending process.

Description

Technical Field

[0001] The present invention relates to a forming die for a multi-folded part, belonging to the technical field of stamping dies. Background Art

[0002] A conductive part with a structure similar to a chair is a functional part of a circuit switch. The structure of the conductive part is as Figures 1 to 2 shown. There are a front foot 31 and a rear foot 32 on the conductive part 34, and a stamping die is required to process and form the structures of the front foot 31 and the rear foot 32.

[0003] The original production process was to use a bending die to bend and form the front foot 31 and the rear foot 32 sequentially, and then use the bending die to bend and form the blank material after forming the front foot 31 and the rear foot 32. Although the product parts of the conductive part can be finally obtained, since the front foot 31 and the rear foot 32 are bent and formed sequentially first (the sequential forming process can refer to a new type of step-by-step bending precision die with the Chinese patent publication number CN210966645U, disclosed: the process of the completion of the first bending A forming and the second bending B forming), then, there is a problem that the corner formed by the previous bending is easily damaged during the next bending, resulting in difficulty in ensuring the angles of the bent front foot 31 and rear foot 32, and the product does not meet the use requirements. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a forming die for a multi-folded part.

[0005] The present invention is achieved through the following technical solutions.

[0006] A forming die for a multi-folded part provided by the present invention includes:

[0007] A die insert;

[0008] A positioning plate B installed on the top of the die insert, a main push block slidably installed through the die insert in a liftable manner, and a movable punch A corresponding to the main push block;

[0009] A fixed punch slidably installed in a relatively slidable and telescopic manner inside the movable punch A, and the main push block is provided with a through groove for the fixed punch to penetrate;

[0010] A positioning push block slidably installed in the main push block in a liftable manner, a movable punch B corresponding to the positioning push block and capable of telescopic movement, a right slider slidably installed in a telescopic manner inside the movable punch B, and a left slider slidably installed in a telescopic manner inside the die insert.

[0011] The die insert is embedded and installed in a die plate. There is a lower lining plate at the bottom of the die plate. The bottom of the die insert contacts the lower lining plate to obtain support. A lower backing plate is installed at the bottom of the lower lining plate, and a lower die base is installed at the bottom of the lower backing plate.

[0012] A push rod is installed in contact with the bottom of the main pushing block. The push rod can slide through the concave template, the lower lining plate, the lower backing plate, and the lower die base. A spring ejector is installed in contact with the bottom of the push rod. A bolt is installed through the spring ejector, and a spring B is sleeved outside the bolt. The bolt is fixed on the lower die base.

[0013] The top of the fixed punch is fixedly connected to the fixing plate B. The fixing plate B is fixedly connected to the upper die base through the upper backing plate. The upper die base is fixedly connected with a die shank; the bottom of the fixing plate B is fixedly connected with an upper lining plate. The upper lining plate is fixedly connected with a fixing plate A. The movable punch A can be slidably installed in the upper lining plate and the fixing plate A. A spring C is installed between the fixing plate B and the movable punch A. The spring C is sleeved outside the fixed punch. The elastic force of the spring C is greater than the elastic forces of the spring B and the spring A.

[0014] The movable punch B can be slidably installed inside the upper lining plate and the fixing plate A. A spring D is installed inside the fixing plate B. Both ends of the spring D are installed and connected with the movable punch B and the upper backing plate. The movable punch B slides and expands inside the upper lining plate and the fixing plate A by squeezing the spring D; the movable punch B is closely attached to the movable punch A.

[0015] A spring A is installed inside the main pushing block. The bottom of the spring A is installed and connected with the lower backing plate. The top of the spring A is installed and connected with the bottom of the positioning push block. The spring A drives the positioning push block to lift and slide inside the main pushing block.

[0016] The elastic force of the spring D is greater than that of the spring A.

[0017] A positioning plate A for driving the right slider and a left inclined wedge for driving the left slider are respectively installed on the fixing plate A. The positioning plate A is provided with an inclined surface in contact with the right slider to drive the right slider to slide inside the movable punch B. The left inclined wedge is provided with an inclined surface in contact with the left slider to drive the left slider to slide inside the die insert; a return spring for driving the right slider to slide out of the movable punch B is sleeved outside the right slider, and a return spring for driving the left slider to slide out of the die insert is sleeved outside the left slider.

[0018] A guide sleeve is installed on the upper die base, and a guide post is installed on the lower die base. The guide post and the guide sleeve are sleeved together to provide guidance for mold opening and mold closing.

[0019] The beneficial effects of the present invention are as follows: The back of the blank is formed into an L shape on the positioning plate, the die insert, the main pushing block, and the movable punch A. The movable punch B descends to press the positioning push block to descend inside the main pushing block, and at the same time drives the right slider and the left slider to slide. The right slider slides inside the movable punch B towards the rear leg of the conductive part to form the rear leg, and the left slider slides inside the die insert towards the front leg of the conductive part to form the front leg, realizing the simultaneous bending and forming of the front leg and the rear leg of the conductive part, and solving the problem that the angle formed by the previous bending and forming is easily damaged during the next bending and forming. Description of the Drawings

[0020] Figure 1 is the front sectional view of the conductive part;

[0021] Figure 2 is Figure 1 the left view of;

[0022] Figure 3 is the front sectional view of the blank part;

[0023] Figure 4 is Figure 3 the left view of;

[0024] Figure 5 is the schematic diagram of the mold opening state of the present invention;

[0025] Figure 6 is the schematic diagram of the mold closing state of the present invention;

[0026] Figure 7 is the structural schematic diagram of the movable punch A of the present invention;

[0027] Figure 8 is the structural schematic diagram of the movable punch B of the present invention;

[0028] Figure 9 is the structural schematic diagram of the main push block of the present invention;

[0029] Figure 10 is the structural schematic diagram of the left slider of the present invention;

[0030] Figure 11 is the structural schematic diagram of the right slider of the present invention;

[0031] Figure 12 is the top view schematic diagram of the positioning plate B of the present invention;

[0032] In the figure: 1 - mold handle; 2 - upper mold base; 3 - upper backing plate; 4 - fixing plate B; 5 - upper lining plate; 6 - fixing plate A; 7 - movable punch B; 8 - positioning plate A; 9 - right slider; 10 - concave mold plate; 11 - lower lining plate; 12 - lower backing plate; 13 - lower mold base; 14 - positioning push block; 15 - main push block; 16 - concave mold insert; 17 - left slider; 18 - positioning plate B; 19 - left inclined wedge; 20 - movable punch A; 21 - fixed punch; 22 - guide pillar; 24 - guide sleeve; 24 - spring ejector; 251 - spring A; 252 - spring B; 253 - spring C; 254 - spring D; 34 - conductive part; 31 - front foot; 32 - rear foot; 33 - part to be bent. 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] As Figures 1 to 12shown.

[0035] A multiple bending part forming die of the present invention comprises:

[0036] The die insert 16 is fixed in both the open and closed mold states;

[0037] The die insert 16 is embedded and installed in the die plate 10. A lower lining plate 11 is provided at the bottom of the die plate 10. The bottom of the die insert 16 contacts with the lower lining plate 11 for support. A lower pad 12 is installed at the bottom of the lower lining plate 11. A lower die base 13 is installed at the bottom of the lower pad 12. The lower die base 13 is installed on the workbench of the press to support the lower pad 12. The lower pad 12 supports the lower lining plate 11, so that the die insert 16 is fixed in the die plate 10 with the support of the lower lining plate 11 when the mold is opened and closed.

[0038] The positioning plate B18 fixedly mounted on the top of the die insert 16 can be lifted and slid through the main push block 15 installed in the die insert 16, and the movable punch A20 corresponding to the main push block 15 presses down to make the main push block 15 lift and slide in the die insert 16, so that the back of the blank (the conductive member 34 is Figure 1 The left end face and the bottom end face portion shown) are formed on the positioning plate B18, the die insert 16, the main push block 15 and the movable punch A20 to present an L shape;

[0039] A push rod is installed at the bottom of the main push block 15, and the push rod can slide from top to bottom through the concave mold plate 10, the lower lining plate 11, the lower pad 12, and the lower die seat 13. A spring ejector 24 is installed at the bottom of the push rod, and a bolt is installed through the spring ejector 24. The bolt jacket is provided with a spring B252, and the bolt is fixed on the lower die seat 13. The spring B252 pushes the spring ejector 24, and the spring ejector 24 pushes the push rod, and the push rod pushes the main push block 15, so that the main push block 15 can be lifted and slidably installed in the concave die insert 16.

[0040] The main push block 15 is provided with a through slot for the fixed punch 21 to penetrate, and the fixed punch 21 can penetrate the part 22 of the blank to be bent from the inside of the movable punch A20 and bend it into the through slot of the main push block 15. At this time, the fixed punch 21 presses the blank on both sides of the part to be bent against the top of the main push block 15;

[0041] The top of the fixed punch 21 is fixedly connected to the fixing plate B4. The fixing plate B4 is fixedly connected to the upper die base 2 through the upper backing plate 3. The upper die base 2 is fixedly connected with a die shank 1. The die shank 1 is connected to the punch of the stamping machine to realize die closing or die opening. The bottom of the fixing plate B4 is fixedly connected with an upper lining plate 5. The upper lining plate 5 is fixedly connected with a fixing plate A6. The movable punch A20 is slidably installed in the upper lining plate 5 and the fixing plate A6. A spring C253 is installed between the fixing plate B4 and the movable punch A20. The spring C253 is sleeved outside the fixed punch 21. The movable punch A20 squeezes the spring C253 to deform, so that the fixed punch 21 can slide relative to the inside of the movable punch A20. The elastic force of the spring C253 is greater than the elastic forces of the spring B252 and the spring A251. When subjected to a squeezing force, the spring B252 and the spring A251 are deformed and compressed first, so that when the movable punch A20 presses down, the main pushing block 15 will overcome the spring B252 and the spring A251 and slide down.

[0042] A positioning push block 14 that is slidably installed in the main pushing block 15 in a liftable manner, a movable punch B7 that corresponds to the positioning push block 14 and can perform telescopic movement to contact or separate from the positioning push block 14. A right slider 9 is slidably installed in the movable punch B7 in a telescopic manner, and a left slider 17 is slidably installed in the die insert 16 in a telescopic manner. When the movable punch A20 presses the main pushing block 15 down to the bottom to form the blank into an L shape, the movable punch B7 descends to press the positioning push block 14 to descend in the main pushing block 15, and at the same time drives the right slider 9 and the left slider 17 to slide. The right slider 9 slides in the movable punch B7 towards the rear leg 32 of the conductive part 34 to form the rear leg 32, and the left slider 17 slides in the die insert 16 towards the front leg 31 of the conductive part 34 to form the front leg 31, so that the blank realizes the simultaneous bending and forming of the front leg 31 and the rear leg 32 of the conductive part 34 on the multi-bending part forming die, solves the problem that the angle formed by the previous bending is easily damaged during the next bending, ensures the angles of the front leg 31 and the rear leg 32 after bending, and the product meets the use requirements.

[0043] The movable punch B7 is slidably installed inside the upper lining plate 5 and the fixing plate A6. A spring D254 is installed inside the fixing plate B4. Both ends of the spring D254 are installed and connected to the movable punch B7 and the upper backing plate 3. The movable punch B7 slides and expands and contracts inside the upper lining plate 5 and the fixing plate A6 by squeezing the spring D254. The movable punch B7 is closely attached to the movable punch A20.

[0044] A spring A251 is installed in the main pushing block 15. The bottom of the spring A251 is installed and connected to the lower backing plate 12, and the top of the spring A251 is installed and connected to the bottom of the positioning push block 14. The spring A251 drives the positioning push block 14 to slide up and down in the main pushing block 15. The elastic force of the spring D254 is greater than that of the spring A251, so that when the spring D254 and the spring A251 are subjected to a squeezing force, the spring A251 is squeezed first.

[0045] The fixed plate A6 is respectively provided with a positioning plate A8 for driving the right slider 9 and a left oblique wedge 19 for driving the left slider 17. The positioning plate A8 is provided with an inclined surface that contacts the right slider 9 to drive the right slider 9 to slide in the movable punch B7. The left oblique wedge 19 is provided with an inclined surface that contacts the left slider 17 to drive the left slider 17 to slide in the die insert 16. The right slider 9 is sheathed with a return spring that drives the right slider 9 to slide in the movable punch B7. The left slider 17 is sheathed with a return spring that drives the left slider 17 to slide in the die insert 16.

[0046] The upper die seat 2 is provided with a guide sleeve 23, and the lower die seat 13 is provided with a guide post 22, which is sleeved with the guide sleeve 23 to provide guidance for mold opening and mold closing. The upper die seat 2 and the lower die seat 13 are provided with limit piles correspondingly, and the limit piles of the upper die seat 2 and the limit piles of the lower die seat 13 are contact-limited in the final mold closing processing state, and the punching machine excessively drives the mold to punch up and down, thereby protecting the processed conductive part 34.

[0047] Working principle: First, the punch clamp drives the die handle 1 downward. Since the elastic force of spring C253 is greater than the elastic force of spring B252, spring C253 presses the movable punch A20 to bend the part blank into an "L" shape together with the die insert 16, the main push block 15, and the positioning plate B18. At this time, the main push block 15 has moved downward to the bottom dead center position in contact with the lower pad 12; then, the punch clamp drives the die handle 1 to continue to move downward, and the movable punch A20 overcomes the spring D254 to move upward. The spring D254 presses the movable punch B7 downward, and the fixed punch 21 passes through the movable punch A 20 also moves downward, the elastic force of spring D254 is greater than the elastic force of spring A251, and the positioning push block 14 shrinks. During this process, the active punch A20 presses the blanks on both sides of the part to be bent 33 against the top of the main push block 15, which prevents the blank parts from slipping; the punch clamp drives the die handle 1 to continue to move downward to the bottom dead center, and the active punch B7 overcomes the elastic force of spring D254 and moves upward. Under the action of the left inclined wedge 19 and the positioning plate A8, the left slider 17 and the right slider 9 respectively pass through the concave die insert 16 and the active punch B7 to form the front foot 31 and the rear foot 32 of the part blank. Then, the upper and lower molds of the mold are separated under the action of the punch, and the main push block 15, the positioning push block 15, the active punch A20, the active punch B7, the left slider 17, and the right slider 9 return to their original positions. At the same time, the molded part of the conductive part 34 is pushed out of the mold by the main push block 15. At this point, the mold completes a stamping process.

Claims

1. A forming die for a multi-bending part, characterized in that, it includes: a female die insert (16); a positioning plate B (18) installed on the top of the female die insert (16), a main pushing block (15) that can be lifted and slidably penetrated and installed in the female die insert (16), and a movable punch A (20) corresponding to the main pushing block (15); a fixed punch (21) that can be relatively slidably telescoped and installed inside the movable punch A (20), and the main pushing block (15) is provided with a through groove for the fixed punch (21) to penetrate; a positioning pushing block (14) that can be lifted and slidably installed in the main pushing block (15), a movable punch B (7) corresponding to the positioning pushing block (14) and capable of telescopic movement, a right slider (9) that can be telescopically slidably installed inside the movable punch B (7), and a left slider (17) that can be telescopically slidably installed inside the female die insert (16); the top of the fixed punch (21) is fixedly connected to a fixing plate B (4), the fixing plate B (4) is fixedly connected to the upper die base (2) through an upper cushion plate (3), and the upper die base (2) is fixedly connected to a die shank (1); the bottom of the fixing plate B (4) is fixedly connected to an upper lining plate (5), the upper lining plate (5) is fixedly connected to a fixing plate A (6), the movable punch A (20) can be slidably installed inside the upper lining plate (5) and the fixing plate A (6), and a spring C (253) is installed between the fixing plate B (4) and the movable punch A (20), and the spring C (253) is sleeved outside the fixed punch (21); a positioning plate A (8) for driving the right slider (9) and a left inclined wedge (19) for driving the left slider (17) are respectively installed on the fixing plate A (6), the positioning plate A (8) is provided with an inclined surface to contact the right slider (9) to drive the right slider (9) to slide inside the movable punch B (7), and the left inclined wedge (19) is provided with an inclined surface to contact the left slider (17) to drive the left slider (17) to slide inside the female die insert (16); a return spring for driving the right slider (9) to slide out of the movable punch B (7) is sleeved outside the right slider (9), and a return spring for driving the left slider (17) to slide out of the female die insert (16) is sleeved outside the left slider (17); simultaneously driving the right slider (9) and the left slider (17) to slide, the right slider (9) slides in the movable punch B (7) towards the rear leg (32) of the conductive part (34) to form the rear leg (32), and the left slider (17) slides in the female die insert (16) towards the front leg (31) of the conductive part (34) to form the front leg (31), so that the blank realizes simultaneous bending and forming of the front leg (31) and the rear leg (32) of the conductive part (34) on the forming die for the multi-bending part.

2. The forming die for a multi-bending part according to claim 1, characterized in that: the female die insert (16) is embedded and installed in the female die plate (10), there is a lower lining plate (11) at the bottom of the female die plate (10), the bottom of the female die insert (16) contacts the lower lining plate (11) to obtain support, a lower cushion plate (12) is installed at the bottom of the lower lining plate (11), and a lower die base (13) is installed at the bottom of the lower cushion plate (12).

3. The forming die for a multi-bending part according to claim 2, characterized in that: A push rod is installed in contact with the bottom of the main push block (15). The push rod can slide through the concave template (10), the lower lining plate (11), the lower backing plate (12), and the lower die base (13). A spring ejector (24) is installed in contact with the bottom of the push rod. A bolt is installed through the spring ejector (24), and a spring B (252) is sleeved outside the bolt. The bolt is fixed on the lower die base (13).

4. The multi-bending part forming die according to claim 1, characterized in that: The movable punch B (7) is slidably installed inside the upper lining plate (5) and the fixing plate A (6). A spring D (254) is installed inside the fixing plate B (4). Both ends of the spring D (254) are installed and connected to the movable punch B (7) and the upper backing plate (3). The movable punch B (7) slides and expands inside the upper lining plate (5) and the fixing plate A (6) by extruding the spring D (254).

5. The multi-bending part forming die according to claim 4, characterized in that: The movable punch B (7) is in close contact with the movable punch A (20).

6. The multi-bending part forming die according to claim 4, characterized in that: A spring A (251) is installed inside the main push block (15). The bottom of the spring A (251) is installed and connected to the lower backing plate (12). The top of the spring A (251) is installed and connected to the bottom of the positioning push block (14). The spring A (251) drives the positioning push block (14) to lift and slide inside the main push block (15).

7. The multi-bending part forming die according to claim 6, characterized in that: The elastic force of the spring D (254) is greater than that of the spring A (251).

8. The multi-bending part forming die according to claim 2, characterized in that: A guide sleeve (23) is installed on the upper die base (2), and a guide post (22) is installed on the lower die base (13). The guide post (22) and the guide sleeve (23) are sleeved to provide guidance for mold opening and mold closing.

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