A primary side forming die for negative angle bosses on both sides of a U-shaped opening of a swing arm

Abstract

The present invention discloses a single-stage side-forming die for negative-angle bosses on both sides of a U-shaped opening in a swing arm, belonging to the technical field of producing bosses on both sides of a U-shaped opening at the end of an automobile swing arm. An upper die insert is provided at the bottom of an upper die plate, and a first and second symmetrically provided concave-convex die fixing frame are provided on both sides of the lower die plate. The first and second symmetrically provided convex-convex die fixing frames are slidably connected to the lower die plate. The first and second convex-convex die fixing frames are fixedly connected to a first and second convex die and a first and second side-forming concave die. A part is placed on top of the first and second convex dies, which are attached to each other. The lower die plate presses the part downward while the upper die insert is used to separate the first and second convex dies. The first and second side-forming concave dies press the two sides of the fixed part to form a U-shaped boss. The present invention can stamp the negative-angle bosses on both sides of the end opening in a single stamping operation, thereby improving production efficiency and ensuring product precision requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of producing bosses on both sides of a U-shaped opening at the end of an automobile swing arm, and in particular relates to a primary side forming die for negative-angle bosses on both sides of the U-shaped opening of the swing arm. Background Art

[0002] With the booming automotive industry, companies are increasingly demanding higher production efficiency. Reducing equipment and tooling failure rates and improving efficiency have become key priorities. In the production of a certain swing arm opening, a die with bosses on both sides forms an inward-facing negative angle. The stamping process steps are as follows:

[0003] Blanking - drawing - trimming - flanging - boss adjustment - boss adjustment - punching side punching;

[0004] The existing mold structure has a single-sided integral boss, which has low production efficiency. The surface of the part is formed by two stampings, and the dimensional stability of the part opening is difficult to ensure. Summary of the Invention

[0005] The purpose of the present invention is to provide a primary side forming die for negative angle bosses on both sides of the U-shaped opening of a swing arm, so as to solve the problems of the existing die structure, single-sided boss, low production efficiency, and the part opening formed by the twice-stamped surface, and the difficulty in ensuring the stability of the part opening size.

[0006] A primary side forming mold for negative angle bosses on both sides of a U-shaped opening of a swing arm, comprising an upper mold plate and a lower mold plate, wherein the upper mold plate is located above the lower mold plate and an upper mold insert is provided at the bottom of the upper mold plate, and a concave-convex mold fixing frame 1 and a concave-convex mold fixing frame 2 are symmetrically provided on both sides of the lower mold plate, and the concave-convex mold fixing frame 1 and the concave-convex mold fixing frame 2 are slidably connected to the lower mold plate, and the concave-convex mold fixing frame 1 and the concave-convex mold fixing frame 2 are both fixedly connected to the punch 1 and the punch 2 and the side forming concave mold 1 and the side forming concave mold 2, the part is placed on the top of the adjacent punch 1 and the punch 2 and the lower mold plate presses the part downward while the upper mold insert is used to separate the punch 1 and the punch 2, and the side forming concave mold 1 and the side forming concave mold 2 press the two sides of the fixed part to form a U-shaped boss.

[0007] Preferably, an upper die driving block 1 and an upper die driving block 2 are symmetrically provided at the bottom of the upper die plate, and the lower die driving block 1 and the lower die driving block 2 are symmetrically provided at the top of the lower die plate. The upper die driving block 1 and the upper die driving block 2 have a sloped structure on one side close to the upper die insert, and the lower die driving block 1 and the lower die driving block 2 also have a sloped structure on one side away from the upper die insert. The sloped sides of the upper die driving block 1 and the upper die driving block 2 and the lower die driving block 1 and the lower die driving block 2 are opposite to each other, and the other sides of the lower die driving block 1 and the lower die driving block 2 are fixedly connected to the side forming die 1 and the side forming die 2 respectively.

[0008] Preferably, baffle 1 and baffle 2 are symmetrically provided on both sides of the lower template, and baffle 1 and baffle 2 are respectively located on one side of the concave-convex mold fixing frame 1 and the concave-convex mold fixing frame 2, and a nitrogen spring 1 is provided between the baffle 1 and the concave-convex mold fixing frame 1, and a nitrogen spring 2 is provided between the baffle 2 and the concave-convex mold fixing frame 2.

[0009] Preferably, the tops of the concave-convex mold fixing frame 1 and the concave-convex mold fixing frame 2 are respectively slidably connected with the lower mold driving block 1 and the lower mold driving block 2, and the built-in nitrogen spring assembly 1 and the built-in nitrogen spring assembly 2 are respectively provided between the lower mold driving block 1 and the punch 1 and the lower mold driving block 2 and the punch 2.

[0010] Preferably, the middle part of the upper template is provided with pressure plate one, pressure plate two and a presser in sequence downward, the presser is fixedly connected below the pressure plate two, the bottom of the presser is fixedly connected to the upper mold insert, and the presser presses on the top of the part.

[0011] Preferably, the corners of the lower template are fixedly connected to a fixing seat and the top of the fixing seat is provided with a through hole, a guide column is slidably connected in the through hole and a buffer spring is provided on the surface of the guide column, and the top of the guide column is in contact with the bottom of the upper template.

[0012] Preferably, the bottom of the lower template is provided with a mold foot fixedly connected by bolts, the bottom of the mold foot is fixedly connected to a pad by bolts, and the corners of the lower template are provided with lifting ears.

[0013] The present invention has the following advantages:

[0014] The mold of the present invention is designed by splitting the mold punch structure. The single-sided punch and the die are assembled on the same fixed frame. The upper mold inserter is used to open the punch to the size required for part molding during the mold closing process. After the mold is opened, the punch is closed by the built-in nitrogen spring, which facilitates the demoulding of the formed part. The negative angle bosses on both sides of the end opening are stamped in one punch, which improves production efficiency and ensures the precision requirements of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the mold assembly of the present invention.

[0016] Figure 2 It is a cross-sectional view of the mold assembly of the present invention.

[0017] Figure 3 This is a reference view of the lower mold of the mold of the present invention.

[0018] Figure 4 This is a cross-sectional view of the lower mold when the mold is open.

[0019] in:

[0020] 1. Upper mold plate; 2. Lower mold plate; 3. Die foot; 4. Pad; 5. Lifting ear; 6. Guide column; 7. Baffle plate (1); 8. Upper mold drive block (1); 9. Lower mold drive block (1); 10. Nitrogen spring (1); 11. Punch and groove fixing frame (1); 12. Built-in guide plate; 13. Built-in nitrogen spring assembly (1); 14. Punch (1); 15. Side forming die (1); 16. Press plate (1); 17. Press plate (2); 18. Presser; 19. Upper mold insert; 20. Punch (2); 21. Punch and groove fixing frame (2); 22. Side forming die (2); 23. Lower mold drive block (2); 24. Nitrogen spring (2); 25. Baffle plate (2); 26. Upper mold drive block; 27. Built-in nitrogen spring assembly (2). DETAILED DESCRIPTION

[0021] The specific implementation methods of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0022] like Figure 1-4 The shown one is a primary side forming mold for negative angle bosses on both sides of a U-shaped opening of a swing arm, comprising an upper mold plate 1 and a lower mold plate 2, wherein the upper mold plate 1 is located above the lower mold plate 2 and an upper mold insert 19 is provided at the bottom of the upper mold plate 1, and a concave-convex mold fixing frame 11 and a concave-convex mold fixing frame 2 symmetrically provided on both sides of the lower mold plate 2, and the concave-convex mold fixing frame 11 and the concave-convex mold fixing frame 2 are slidingly connected to the lower mold plate 2, and the concave-convex mold fixing frame 11 and the concave-convex mold fixing frame 2 are fixedly connected to the punch 14 and the punch 20 as well as the side forming concave mold 15 and the side forming concave mold 2 22, the part is placed on the top of the adjacent punch 14 and the punch 20 and the lower mold plate 2 presses down the part while the upper mold insert 19 is used to separate the punch 14 and the punch 2 20, and the side forming concave mold 15 and the side forming concave mold 2 22 press the two sides of the fixed part to form a U-shaped boss.

[0023] The bottom of the upper template 1 is symmetrically provided with an upper mold driving block 8 and an upper mold driving block 2 26, and the top of the lower template 2 is symmetrically provided with the lower mold driving block 9 and the lower mold driving block 2 23. The upper mold driving block 8 and the upper mold driving block 2 26 have an inclined structure on the side close to the upper mold insert 19, and the lower mold driving block 9 and the lower mold driving block 2 23 have an inclined structure on the side away from the upper mold insert 19. The inclined sides of the upper mold driving block 8 and the upper mold driving block 2 26 and the lower mold driving block 9 and the lower mold driving block 2 23 are opposite to each other, and the other sides of the lower mold driving block 9 and the lower mold driving block 2 23 are fixedly connected with the side forming die 15 and the side forming die 2 22 respectively.

[0024] The baffle 1 7 and the baffle 2 25 are symmetrically provided on both sides of the lower template 2. The baffle 1 7 and the baffle 2 25 are respectively located on one side of the concave-convex mold fixing frame 1 11 and the concave-convex mold fixing frame 2 21. A nitrogen spring 10 is provided between the baffle 1 7 and the concave-convex mold fixing frame 1 11, and a nitrogen spring 24 is provided between the baffle 2 25 and the concave-convex mold fixing frame 2 21.

[0025] The tops of the concave-convex mold fixing frame 11 and the concave-convex mold fixing frame 2 21 are respectively slidably connected with the lower mold driving block 1 9 and the lower mold driving block 2 23, and the lower mold driving block 1 9 and the punch 1 14 are respectively provided with a built-in nitrogen spring assembly 1 13 and a built-in nitrogen spring assembly 2 27 between the lower mold driving block 1 9 and the punch 1 14 and the lower mold driving block 2 23 and the punch 2 20.

[0026] The middle part of the upper template 1 is provided with a pressing plate 16, a pressing plate 2 17 and a presser 18 in sequence. The presser 18 is fixedly connected to the bottom of the pressing plate 2 17. The bottom of the presser 18 is fixedly connected to the upper mold insert 19. The presser 18 presses on the top of the part.

[0027] The corners of the lower template 2 are fixedly connected with a fixing seat and the top of the fixing seat is provided with a through hole. A guide column 6 is slidably connected in the through hole and a buffer spring is sleeved on the surface of the guide column 6. The top of the guide column 6 is in contact with the bottom of the upper template 1.

[0028] The bottom of the lower template 2 is provided with a mold foot 3 fixedly connected by bolts, the bottom of the mold foot 3 is fixedly connected to a pad 4 by bolts, and the corners of the lower template 2 are provided with lifting ears 5.

[0029] Working principle: The parts are taken, placed and formed through the action of nitrogen spring 10 and nitrogen spring 24 or upper die drive block 18 and upper die drive block 26 and upper die insert 19. During production, when the mold is in the open state, the concave-convex mold fixing frame 11 and the concave-convex mold fixing frame 2 21 are under the action of the built-in nitrogen spring assembly 13 and the built-in nitrogen spring assembly 2 27, and the punch 14 and the punch 2 20 fixed thereon are in the closed state. The parts are placed on the closed punch 14 and the punch 2 20, and the machine tool is started. As the machine tool descends, the upper mold inserter 19 is first introduced into the guide hole between the punch 14 and the punch 2 20. As the mold descends, the upper mold inserter 19 opens the punch 14 and the punch 2 20 to the required design size, and the presser 18 presses the part. At this time, the upper mold drive block 1 8 and the upper mold drive block 2 26 are pressed on the inclined side of the lower mold drive block 1 9 and the lower mold drive block 2 23. The side forming die 15 and the side forming die 2 22 are closed and act on the part through the force of the inclined surface, and the machine tool continues Continuing downward, the side forming die 15 and the side forming die 22 run to their final positions, and the opened punch 14 and punch 20 generate forming force to form the bosses on both sides of the part into place. After the stroke reaches the bottom, the machine tool moves upward to complete a stamping process. After the mold moves upward, the forces acting on the upper die drive block 18, the upper die drive block 26, and the upper die insert 19 disappear. The punch and die fixing frame 11 and the punch and die fixing frame 21, the punch 14 and punch 20 fixed thereon, and the side forming die 15 and side forming die 22 are respectively returned to their initial positions by the built-in nitrogen spring assembly 13 and the built-in nitrogen spring assembly 27. At this time, the side forming die 15 and the side forming die 22 are in the open state, and the punch is in the closed state. The part is removed. The part is pressed by the upper die press during the entire stamping process and does not move. The entire stamping process is completed in one step, which is convenient to operate, improves product precision and saves production costs.

[0030] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the inventive concept and technical solution of the present invention, or the inventive concept and technical solution are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A primary side forming die for negative angle bosses on both sides of a U-shaped opening of a swing arm, characterized by: The invention comprises an upper template (1) and a lower template (2), wherein the upper template (1) is located above the lower template (2) and an upper mold inserting knife (19) is provided at the bottom of the upper template (1), and a concave-convex mold fixing frame 1 (11) and a concave-convex mold fixing frame 2 (21) are symmetrically provided on both sides of the lower template (2), and the concave-convex mold fixing frame 1 (11) and the concave-convex mold fixing frame 2 (21) are slidably connected to the lower template (2), and the concave-convex mold fixing frame 1 (11) and the concave-convex mold fixing frame 2 (21) are symmetrically provided on both sides of the lower template (2). 1) A punch 1 (14) and a punch 2 (20) as well as a side forming die 1 (15) and a side forming die 2 (22) are fixedly connected, a part is placed on top of the punch 1 (14) and the punch 2 (20) which are attached to each other, and the lower mold plate (2) presses the part downward while the upper mold insert (19) is used to separate the punch 1 (14) and the punch 2 (20), and the side forming die 1 (15) and the side forming die 2 (22) press the two sides of the fixed part to form a U-shaped boss; The bottom of the upper mold plate (1) is symmetrically provided with an upper mold drive block 1 (8) and an upper mold drive block 2 (26), and the top of the lower mold plate (2) is symmetrically provided with a lower mold drive block 1 (9) and a lower mold drive block 2 (23), the upper mold drive block 1 (8) and the upper mold drive block 2 (26) are close to the upper mold insert knife (19) and have an inclined surface structure, and the lower mold drive block 1 (9) and the lower mold drive block 2 (23) are away from the upper mold insert knife (19) and have an inclined surface structure, the upper mold drive block 1 (8) and the upper mold drive block 2 (26) are opposite to the inclined surfaces of the lower mold drive block 1 (9) and the lower mold drive block 2 (23), and the other sides of the lower mold drive block 1 (9) and the lower mold drive block 2 (23) are fixedly connected to the side forming die 1 (15) and the side forming die 2 (22) respectively; Baffle 1 (7) and baffle 2 (25) are symmetrically provided on both sides of the lower template (2), and baffle 1 (7) and baffle 2 (25) are respectively located on one side of the concave-convex mold fixing frame 1 (11) and the concave-convex mold fixing frame 2 (21), and a nitrogen spring 1 (10) is provided between the baffle 1 (7) and the concave-convex mold fixing frame 1 (11), and a nitrogen spring 2 (24) is provided between the baffle 2 (25) and the concave-convex mold fixing frame 2 (21); The tops of the concave-convex mold fixing frame 1 (11) and the concave-convex mold fixing frame 2 (21) are respectively slidably connected to the lower mold driving block 1 (9) and the lower mold driving block 2 (23), and the lower mold driving block 1 (9) and the punch 1 (14) are respectively provided with a built-in nitrogen spring assembly 1 (13) and a built-in nitrogen spring assembly 2 (27); A pressing plate 1 (16), a pressing plate 2 (17) and a presser (18) are provided downwardly in the middle of the upper mold plate (1), the presser (18) is fixedly connected to the bottom of the pressing plate 2 (17), the upper mold insert (19) is fixedly connected to the bottom of the presser (18), and the presser (18) presses on the top of the part.

2. The primary side forming die for negative angle bosses on both sides of a U-shaped opening of a swing arm according to claim 1, characterized in that: The corners of the lower template (2) are fixedly connected to a fixing seat, and the top of the fixing seat is provided with a through hole, a guide column (6) is slidably connected in the through hole, and a buffer spring is sleeved on the surface of the guide column (6), and the top of the guide column (6) contacts the bottom of the upper template (1).

3. The primary side forming die for negative angle bosses on both sides of a U-shaped opening of a swing arm according to claim 2, characterized in that: The bottom of the lower template (2) is provided with a mold foot (3) fixedly connected by bolts, the bottom of the mold foot (3) is fixedly connected to a pad (4) by bolts, and the corners of the lower template (2) are provided with lifting ears (5).

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