A pre-stressed reinforcing structure of a frame beam stamping die

Abstract

This utility model discloses a prestressed reinforcement structure for a vehicle frame beam stamping die, relating to the automotive manufacturing field. It includes a lower die base, an upper die base, and four columns. The four columns are fixedly connected to the four corners of the top of the lower die base, and the upper die base is positioned above it. The four columns are slidably connected to the interior of the four corners of the upper die base, and each column has a sliding lifting rod inside. This utility model utilizes a horizontal sliding crossbar, employing the interaction between a trapezoidal groove and the inclined surface at the bottom of the column, to allow the column to slide upwards and compress a spring. Simultaneously, a movable block, driven by the irregular groove, rotates out from both sides of the column. After contacting the top surface of the lower die base, the pushing force of the crossbar is converted into an upward sliding force of the column and a downward pressing force of the movable block on the upper die base. This results in a stronger fit between the upper and lower die bases, better bearing the stamping pressure during the stamping process, reducing die deformation and displacement, and ensuring the stamping accuracy of the vehicle frame beam.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, and in particular to a prestressed reinforcement structure for a vehicle frame beam stamping die. Background Technology

[0002] In traditional chassis beam stamping die design, to ensure the die can withstand enormous pressure during stamping without excessive deformation or damage, the thickness of the die material and the rigidity of the die structure are typically increased. For example, this is achieved by thickening the upper and lower die plates and adding reinforcing ribs inside the die to enhance its overall strength and rigidity. However, while this approach improves the die's compressive strength to some extent, it also introduces several problems. Firstly, increasing the die material thickness significantly increases the die's weight, raising manufacturing costs and complicating installation, transportation, and operation, thus increasing labor intensity and equipment load during production. Secondly, while thickening the die plate and adding reinforcing ribs reduces elastic deformation during stamping, it can also lead to more severe stress concentration when subjected to impact loads, increasing the risk of localized fatigue damage and shortening the die's lifespan.

[0003] Furthermore, traditional chassis beam stamping dies have significant limitations in prestress adjustment. During the stamping process, different chassis beam products may have different prestress requirements for the die to accommodate different material properties and forming processes. However, traditional die structures often lack effective prestress adjustment mechanisms. Once the die is manufactured, its prestress state is essentially fixed, making it difficult to flexibly adjust according to actual production needs. This leads to the possibility of changing the die or making complex modifications when producing chassis beams of different specifications or materials, increasing production costs and time, and reducing production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a prestressed reinforcement structure for a vehicle frame beam stamping die, which solves the problems of large weight and inconvenient prestress adjustment of traditional dies.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A prestressed reinforcement structure for a vehicle frame beam stamping die includes a lower die base, an upper die base, and four columns. The four columns are fixedly connected to the top four corners of the lower die base, and the upper die base is located above the lower die base. The four columns are slidably connected to the four corners of the upper die base. Each column has a lifting rod slidably connected inside. The column has a transversely penetrating movable cavity on both sides. A movable block is symmetrically rotatably arranged inside the movable cavity. The lifting rod has irregular grooves on both sides, and the movable block is embedded in the corresponding irregular groove. A spring is provided at the top of the lifting rod inside the column. The top of the lifting rod is elastically connected to the inner wall of the column through the spring. The bottom of the lifting rod has an inclined surface. A crossbar is symmetrically provided at the top of the lower die base. The two ends of the crossbar pass through the corresponding columns, and the crossbar is slidably connected to the columns. Two trapezoidal grooves are provided at the top of the crossbar, and the bottom ends of the columns are slidably inserted into the corresponding trapezoidal grooves.

[0006] Preferably, horizontal plates are symmetrically arranged on both sides of the lower mold base. A threaded rod is rotatably connected between the two ends of the horizontal plate through a bearing. A threaded cylinder is fixedly connected to one side of the horizontal rod. The threaded cylinder is threaded to the outside of the corresponding threaded rod. Through the cooperation of the horizontal plate, the threaded rod and the threaded cylinder on the horizontal rod, the horizontal rod can be moved horizontally to drive the column and the upper mold base to move and adjust the prestress.

[0007] Preferably, one end of the threaded rod has a keyway, which facilitates the use of a key to connect a power device to drive the threaded rod to rotate, thereby providing power for the movement of the crossbar.

[0008] Preferably, a punch is fixedly installed inside the lower mold base, and a die is fixedly installed inside the upper mold base. The punch and die are matched with each other, and pressure is applied to the frame beam plate placed between them by the interaction force between the punch and die, so that it undergoes plastic deformation according to the shape set by the punch and die.

[0009] Preferably, curved grooves are symmetrically provided on both sides of the upper and lower mold bases to facilitate the installation and fixing of the upper and lower mold bases.

[0010] Preferably, an adjusting rod is internally threaded at the top of the column, with the top of the spring fitting against the bottom of the adjusting rod. The spring compression is changed by rotating the adjusting rod, thus adjusting the elastic force.

[0011] Preferably, the top of the adjusting rod has a hexagonal groove, which makes it easy to rotate the adjusting rod with a hexagonal wrench to precisely adjust the spring force.

[0012] Compared with the prior art, the advantages of this utility model are as follows: When the upper and lower mold bases of this invention are closed, the horizontal sliding crossbar, through the interaction between the trapezoidal groove and the inclined surface at the bottom of the column, causes the column to slide upward and compress the spring. Simultaneously, the movable block, driven by the irregular groove, rotates out from both sides of the column and contacts the top surface of the lower mold base. The pushing force of the crossbar is then converted into an upward sliding force on the column and a downward pressing force from the movable block on the upper mold base. This results in a stronger fit between the upper and lower mold bases, better withstanding the stamping pressure during the stamping process, reducing mold deformation and displacement, and ensuring the stamping accuracy of the vehicle frame beam.

[0013] This invention provides stable support and guidance for the upper die base by using four pillars at the four corners of the top of the lower die base. During the stamping process, the pillars restrict the movement trajectory of the upper die base, allowing it to move only vertically, thus ensuring accurate alignment between the upper and lower die bases and further improving the precision and stability of the stamping process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the column structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the crossbar structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the lifting rod structure of this utility model.

[0018] Reference numerals: 1. Lower mold base; 2. Upper mold base; 3. Column; 4. Lifting rod; 5. Movable cavity; 6. Movable block; 7. Irregular groove; 8. Spring; 9. Inclined surface; 10. Crossbar; 11. Trapezoidal groove; 12. Horizontal plate; 13. Threaded rod; 14. Threaded cylinder; 15. Keyway; 16. Punch; 17. Die; 18. Curved groove; 19. Adjusting rod; 20. Hexagonal groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1 to 4This embodiment provides a prestressed reinforcement structure for a vehicle frame beam stamping die, including a lower die base 1, an upper die base 2, and four columns 3. The four columns 3 are fixedly connected to the top four corners of the lower die base 1. The upper die base 2 is located above the lower die base 1. The four columns 3 are slidably connected to the four corners of the upper die base 2. Each column 3 has a lifting rod 4 slidably connected inside. The column 3 has a transversely penetrating movable cavity 5 inside, and a movable block 6 is symmetrically rotatably arranged inside the movable cavity 5. The lifting rod 4 has irregular grooves 7 on both sides, and the movable block 6 is embedded in the corresponding irregular groove 7. A spring 8 is provided at the top of the lifting rod 4 inside the column 3. The top of the lifting rod 4 is elastically connected to the inner wall of the column 3 through the spring 8. The bottom of the lifting rod 4 has an inclined surface 9. The top of the lower die base 1 has a crossbar 10 symmetrically arranged. The two ends of the crossbar 10 pass through the corresponding columns 3, and the crossbar 10 is slidably connected to the columns 3. The top of the crossbar 10 has two trapezoidal grooves 11, and the bottom ends of the columns 3 are slidably inserted into the corresponding trapezoidal grooves 11.

[0021] When the upper mold base 2 and the lower mold base 1 are closed, the movable cavity 5 is located at the top of the upper mold base 2. At this time, through the transverse sliding bar 10, due to the special shape of the trapezoidal groove 11, when the bar 10 moves, the inclined surface of the trapezoidal groove 11 will push the inclined surface 9 at the bottom of the corresponding column 3. According to the principle of force decomposition and transmission, this pushing force will be decomposed into a component force that makes the column 3 slide upward, thereby making the column 3 slide upward and compress the spring 8 to contract. At the same time, as the column 3 rises, the movable block 6 gradually rotates out from both sides of the column 3 under the drive of the irregular groove 7. The rotating movable block 6 gradually contacts the top surface of the lower mold base 1. After contact, the continuous pushing force of the bar 10 will be further converted into the upward sliding force of the column 3. According to the principle of force interaction, the movable block 6 will generate a downward pressing force on the upper mold base 2, making the fit between the upper mold base 2 and the lower mold base 1 stronger, thereby increasing the prestress of the upper mold base 2 and the lower mold base 1.

[0022] The lower mold base 1 has symmetrical horizontal plates 12 on both sides. The two ends of the horizontal plates 12 are rotatably connected by a threaded rod 13 through a bearing. A threaded cylinder 14 is fixedly connected to one side of the horizontal rod 10. The threaded cylinder 14 is threadedly connected to the outside of the corresponding threaded rod 13.

[0023] By rotating the threaded rod 13, the threaded cylinder 14 will move linearly along the axial direction of the threaded rod 13, thereby driving the crossbar 10, which is fixedly connected to the threaded cylinder 14, to slide laterally, thereby adjusting the position of the crossbar 10 and controlling the prestress between the upper mold base 2 and the lower mold base 1.

[0024] One end of the threaded rod 13 is provided with a keyway 15. The keyway 15 facilitates the connection of external power devices such as motors and manual cranks to the threaded rod 13 using standard parts such as flat keys. The external power device drives the threaded rod 13 to rotate, thereby providing power for the rotation of the threaded rod 13. This allows the entire structure to achieve the sliding operation of the crossbar 10 more conveniently and efficiently, thereby realizing the adjustment of the prestress between the upper mold base 2 and the lower mold base 1.

[0025] A punch 16 is fixedly installed inside the lower die holder 1, and a die 17 is fixedly installed inside the upper die holder 2. The punch 16 and the die 17 are matched with each other. During the stamping process of the vehicle frame beam, when the upper die holder 2 and the lower die holder 1 are closed, the punch 16 will be precisely embedded in the die 17. Through the interaction force between the punch 16 and the die 17, pressure is applied to the vehicle frame beam plate placed between the two, so that it undergoes plastic deformation according to the shape set by the punch 16 and the die 17, thereby completing the stamping process of the vehicle frame beam.

[0026] Both sides of the upper die holder 2 and the lower die holder 1 are symmetrically provided with curved grooves 18. The curved grooves 18 can facilitate the installation and fixation of the upper die holder 2 and the lower die holder 1. During installation, a fixing device that matches the shape of the curved groove 18 can be inserted into the curved groove 18. The fixing device and the curved groove 18 can be used to firmly fix the upper die holder 2 and the lower die holder 1 on the worktable, preventing the upper die holder 2 and the lower die holder 1 from shifting during the stamping process, and ensuring the accuracy and quality of the stamping process.

[0027] An adjusting rod 19 is internally threaded at the top of the column 3. The top of the spring 8 is in contact with the bottom of the adjusting rod 19. By rotating the adjusting rod 19, the adjusting rod 19 will move up and down along the axial direction of the column 3. When the adjusting rod 19 moves downward, it will compress the spring 8, increasing the elastic force of the spring 8. Conversely, when the adjusting rod 19 moves upward, the compression of the spring 8 will decrease, and the elastic force will decrease.

[0028] The top of the adjusting rod 19 has a hexagonal groove 20. The hexagonal groove 20 is designed to facilitate the insertion of common tools such as hex wrenches. By rotating the hexagonal wrench, the torque is transmitted to the adjusting rod 19 through the mechanical cooperation between the wrench and the hexagonal groove 20, thus making it convenient, labor-saving and precise to rotate the adjusting rod 19.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed reinforcement structure for a vehicle frame beam stamping die, comprising a lower die base (1), an upper die base (2), and four columns (3), characterized in that, The four columns (3) are fixedly connected to the top four corners of the lower mold base (1). The upper mold base (2) is located above the lower mold base (1). The four columns (3) are slidably connected to the four corners of the upper mold base (2). Each column (3) has a lifting rod (4) slidably connected inside. The column (3) has a movable cavity (5) that runs horizontally through both sides. The movable cavity (5) has a movable block (6) symmetrically rotatably arranged inside. The lifting rod (4) has irregular grooves (7) on both sides. The movable block (6) is embedded in the corresponding irregular groove (7). Inside, the column (3) is provided with a spring (8) at the top of the lifting rod (4). The top of the lifting rod (4) is elastically connected to the inner wall of the column (3) through the spring (8). The bottom of the lifting rod (4) is provided with an inclined surface (9). The top of the lower mold base (1) is symmetrically provided with a horizontal bar (10). The two ends of the horizontal bar (10) pass through the corresponding column (3) respectively, and the horizontal bar (10) is slidably connected to the column (3). The top of the horizontal bar (10) has two trapezoidal grooves (11). The bottom of the column (3) is slidably inserted into the corresponding trapezoidal grooves (11).

2. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 1, characterized in that, The lower mold base (1) is symmetrically provided with horizontal plates (12) on both sides. The two ends of the horizontal plates (12) are rotatably connected by a threaded rod (13) through a bearing. A threaded cylinder (14) is fixedly connected to one side of the horizontal rod (10). The threaded cylinder (14) is threadedly connected to the outside of the corresponding threaded rod (13).

3. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 2, characterized in that, The threaded rod (13) has a keyway (15) at one end.

4. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 1, characterized in that, The lower mold base (1) is fixedly provided with a punch (16), and the upper mold base (2) is fixedly provided with a die (17). The punch (16) and the die (17) are matched with each other.

5. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 1, characterized in that, Both sides of the upper mold base (2) and the lower mold base (1) are symmetrically provided with curved grooves (18).

6. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 1, characterized in that, The top of the column (3) is internally threaded with an adjusting rod (19), and the top of the spring (8) is in contact with the bottom of the adjusting rod (19).

7. The prestressed reinforcement structure of the vehicle frame beam stamping die according to claim 6, characterized in that, The top of the adjusting rod (19) has a hexagonal groove (20).

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