Automobile seat framework stamping device

Abstract

The utility model relates to the field of automobile seat machining, concretely to an automobile seat framework stamping device, including setting on the stamping die for processing the forming mechanism of concave punching and for processing the locking mechanism, release mechanism, torsion mechanism of concave punching in stages, the forming mechanism is installed on the stamping die corresponding automobile seat framework piece concave punching's position, the forming mechanism swing joint is in the stamping die, and the upper die and lower die of stamping die are installed respectively in the fixed end and pressure end of the punch press. Through setting up forming mechanism on the stamping die, corresponding automobile seat framework piece's concave through -hole, utilize stamping die to drive forming mechanism to cooperate inside locking mechanism, release mechanism, torsion mechanism realizes stage depression, thereby makes automobile seat framework piece's concave through -hole stress even, avoids the wrinkle and tearing caused by stress concentration, improves the process effect of forming on automobile seat framework piece.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat processing, and in particular to an automotive seat frame stamping device. Background Technology

[0002] Car seat frames are widely made of high-strength steel sheets through cold stamping to meet the requirements of lightweighting and collision safety. In actual production, seat frame panels often need to form concave structures and connecting through holes in the same area for nut connection or assembly positioning. However, high-strength steel sheets have low plasticity. When concave drawing and through hole punching are concentrated in the same area, the material is prone to stress concentration under bidirectional force, which can lead to wrinkling of hole edges, cracking of walls, or even tearing, seriously affecting the forming quality and product qualification rate.

[0003] To address the aforementioned issues, existing technologies primarily employ two approaches: one is to complete the punching process in the same mold before drawing, but the hole edges can be pulled off course, enlarged, or even cracked as the material flows, making it difficult to guarantee hole position accuracy and cross-sectional quality; the other is to use a step-by-step punch-changing process to shape the hole positions, which improves cracking to some extent, but still has significant limitations, as detailed in the closest existing technology below; in addition, some solutions improve deformation by adding external buffers, air passages, or ejection mechanisms, but this introduces an external power source and multi-component linkage, correspondingly increasing structural complexity and maintenance costs.

[0004] In the prior art, compared with the invention patent with publication number CN110788209A, a method for suppressing the cracking of flanged holes is disclosed. This solution addresses the problem of high cracking rate of flanged holes when high-strength steel is used in automotive seat cushion pads by disclosing a step-by-step forming method. However, although the prior art is an improvement over punching before drawing, it still has the following shortcomings: multiple punch changes are required, the process is dispersed, the production cycle is limited, and the mold configuration requires a replaceable punch mechanism or turret, resulting in complex equipment and high manufacturing costs. In the stretching convex stage, it mainly relies on the upper and lower punches to squeeze and thin the bottom wall to store material, lacking active and uniform control of the stress distribution of the concave periphery material. In more complex concave through-hole surfaces, it is still difficult to fully avoid local wrinkles and tears. In summary, the existing seat frame concave through-hole stamping process still has shortcomings in terms of material stress uniformity, process integration and structural simplicity, and needs further improvement. Utility Model Content

[0005] The purpose of this invention is to provide a stamping device for an automobile seat frame in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions: A stamping device for an automobile seat frame includes a stamping press for providing stamping force and a stamping die for forming an automobile seat frame component. It also includes a forming mechanism disposed on the stamping die for processing concave punches, and a locking mechanism, a releasing mechanism, and a torsion mechanism for processing the concave punches in stages. The forming mechanism is installed on the stamping die at a position corresponding to the concave punches of the automobile seat frame component. The forming mechanism is movably connected to the stamping die. The upper die and lower die of the stamping die are respectively installed on the fixed end and pressure end of the stamping press. An external pressure column is installed on the top of the inner side of the forming mechanism's pressure column. The top of the external pressure column cooperates with the stamping die. A retraction column is cooperated with the bottom of the inner side of the pressure column through a torsion mechanism. A forming seat is installed at the bottom of the retraction column. An inner pressure column is axially connected to the retraction column. The top of the retraction column cooperates with the external pressure column through a release mechanism and a locking mechanism.

[0007] Preferably, the torsion mechanism includes a torsion guide groove, the forming seat is threadedly connected to the bottom of the retraction column, the forming seat has the same concave structure as the concave punch, the two torsion guide grooves are symmetrically arranged on the outer circular surface of the forming seat, a torsion guide block that matches the torsion guide groove is formed on the inner wall of the pressure column, and the top of the retraction column is matched with the retaining ring at the center position of the pressure column by a first support spring.

[0008] Preferably, the release mechanism includes a support ring, which is slidably connected to the inner wall of the pressure column and located below the retaining ring of the pressure column. The inner diameter of the support ring is smaller than the inner diameter of the pressure column, and the outer diameter of the support ring is larger than the outer diameter of the retracting column. Four push rods are evenly arranged in an array on the top of the support ring in the inner wall of the pressure column. The push rods are slidably connected to the inner wall of the pressure column, and the top of the push rods is formed with a top spoon for unlocking the locking mechanism.

[0009] Preferably, the bottom of the external pressure column is supported by a second support spring and a retaining ring on the pressure column. The locking mechanism includes locking balls. Four locking balls are evenly arranged in an array outside the external pressure column. In the initial state, the external pressure column has a recess formed corresponding to the locking ball. The pressure column has a limiting groove formed corresponding to the locking ball position. A locking spring supporting the locking ball is provided inside the limiting groove. The bottom of the locking ball corresponds to the top spoon.

[0010] Preferably, the angle between the limiting groove and the horizontal plane is 60°.

[0011] Preferably, both the first support spring and the second support spring are conical springs.

[0012] Preferably, the inner pressure column is connected to the outer pressure column via a thread.

[0013] Compared with existing technologies, the beneficial effects are as follows: By setting a forming mechanism on the stamping die, corresponding to the concave through holes on the car seat frame, the stamping die drives the forming mechanism in conjunction with the internal locking mechanism, release mechanism and torsion mechanism to achieve staged pressing, so that the concave through holes on the car seat frame are subjected to uniform force, avoiding wrinkles and tears caused by stress concentration, and improving the forming process effect on the car seat frame. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the automobile seat frame stamping device described in this utility model; Figure 2 This is a schematic diagram of the forming mechanism of the stamping device for an automobile seat frame according to the present invention, corresponding to the structure of the automobile seat frame component. Figure 3 This is a schematic diagram of the internal structure of the forming mechanism of the stamping device for an automobile seat frame described in this utility model; Figure 4 This is an exploded view of the forming mechanism of the stamping device for an automobile seat frame described in this utility model; Figure 5 This is a schematic diagram of the initial pressing state of the forming mechanism of the stamping device for an automobile seat frame described in this utility model; Figure 6 This is a schematic diagram of the punching state structure of the forming mechanism of the stamping device for an automobile seat frame described in this utility model.

[0016] The annotations in the attached figures are explained as follows: 1. Stamping press; 2. Stamping die; 3. Forming mechanism; 4. Car seat frame component; 5. Locking mechanism; 6. Release mechanism; 7. Torsion mechanism; 31. Pressure column; 32. Forming seat; 33. Retraction column; 34. External pressure column; 35. Internal pressure column; 36. First support spring; 37. Second support spring; 51. Locking ball; 52. Locking spring; 53. Limiting groove; 61. Support ring; 62. Push rod; 63. Push spoon; 71. Torsion guide groove; 72. Torsion guide block. Detailed Implementation

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-6 As shown, an automobile seat frame stamping device includes a stamping press 1 for providing stamping pressure and a stamping die 2 for forming automobile seat frame parts 4. It also includes a forming mechanism 3 disposed on the stamping die 2 for processing concave punches and a locking mechanism 5, a releasing mechanism 6, and a torsion mechanism 7 for processing the concave punches in stages. The forming mechanism 3 is installed on the stamping die 2 at the position corresponding to the concave punches of the automobile seat frame parts 4. The forming mechanism 3 is movably connected to the stamping die 2. The upper die and the lower die of the stamping die 2 are respectively installed on the fixed end and the pressure end of the stamping press 1. An outer pressure column 34 is installed on the top of the inner side of the pressure column 31 of the forming mechanism 3. The top of the outer pressure column 34 cooperates with the stamping die 2. A retraction column 33 is cooperated with the bottom of the inner side of the pressure column 31 through the torsion mechanism 7. A forming seat 32 is installed at the bottom of the retraction column 33. An inner pressure column 35 is axially connected through the retraction column 33. The top of the retraction column 33 cooperates with the outer pressure column 34 through the release mechanism 6 and the locking mechanism 5.

[0019] In this embodiment, the torsion mechanism 7 includes a torsion guide groove 71. The forming seat 32 is threadedly connected to the bottom of the retraction column 33. The forming seat 32 has the same concave structure as the concave punch. The two torsion guide grooves 71 are symmetrically arranged on the outer circular surface of the forming seat 32. A torsion guide block 72 that matches the torsion guide groove 71 is formed on the inner wall of the pressure column 31. The top of the retraction column 33 is connected to the retaining ring at the center position of the pressure column 31 by a first support spring 36.

[0020] With this configuration, when the forming seat 32 is pressed, it retracts relative to the pressure column 31 along with the retraction column 33. The torsion guide block 72 cooperates with the torsion guide groove 71 to make the forming seat 32 rotate through a certain angle. The material around the concave punch is uniformly torsiond during forming, which disperses stress concentration and suppresses wrinkles and tears. The first support spring 36 ensures timely reset after mold opening.

[0021] In this embodiment, the release mechanism 6 includes a support ring 61, which is slidably connected to the inner wall of the pressure column 31. The support ring 61 is located below the retaining ring of the pressure column 31. The inner diameter of the support ring 61 is smaller than the inner diameter of the pressure column 31, and the outer diameter of the support ring 61 is larger than the outer diameter of the retracting column 33. Four push rods 62 are evenly arranged in an array on the top of the support ring 61 in the inner wall of the pressure column 31. The push rods 62 are slidably connected to the inner wall of the pressure column 31, and the top of the push rods 62 is formed with a top spoon 63 of the unlocking and locking mechanism 5.

[0022] With this configuration, the support ring 61 slides along the pressure column 31 as it is pressed down, and the top rod 62 drives the top spoon 63 to open the locking mechanism 5, so that the locking ball 51 is disengaged from the outer pressure column 34. The outer pressure column 34 and the inner pressure column 35 are released according to the preset stroke, realizing the staged conversion between concave punching and punching, and avoiding local deformation caused by one loading.

[0023] In this embodiment, the bottom of the external pressure column 34 is connected to the retaining ring on the pressure column 31 by the second support spring 37. The locking mechanism 5 includes locking balls 51. Four locking balls 51 are evenly arranged in an array outside the external pressure column 34. In the initial state, the external pressure column 34 has a recess formed on the part corresponding to the locking ball 51. The pressure column 31 has a limiting groove 53 formed on the position corresponding to the locking ball 51. A locking spring 52 supporting the locking ball 51 is provided on the inner side of the limiting groove 53. The bottom of the locking ball 51 corresponds to the top spoon 63.

[0024] With this setup, the locking spring 52 pushes the locking ball 51 into the recess of the outer pressure column 34, keeping the outer pressure column 34 locked to the pressure column 31, and the forming seat 32 first stabilizes and forms the concave shape; after the top spoon 63 pushes out the locking ball 51, the lock is released, and the outer pressure column 34 continues to press down under the action of the second support spring 37 to complete the punching.

[0025] In this embodiment, the angle between the limiting groove 53 and the horizontal plane is 60°.

[0026] With this configuration, the supporting force of the limiting groove 53 on the locking ball 51 and the unlocking thrust of the top spoon 63 form a 60° angle of action, which not only ensures reliable engagement during the forming stage, but also makes the resistance moderate and the unlocking rapid when the top spoon 63 lifts the locking ball 51, thus improving the synchronization and stability of the locking and releasing actions.

[0027] In this embodiment, both the first support spring 36 and the second support spring 37 are conical springs.

[0028] With this configuration, the first and second support springs 36 and 37 of the cone shape exhibit nonlinear stiffness when compressed, resulting in small initial deformation force, which facilitates the smooth contact of the forming seat 32 with the sheet material. The increased stiffness at the end of the mold closing stage provides sufficient holding force, ensuring a smooth transition of force transmission between the forming and punching stages and reducing impact.

[0029] In this embodiment, the inner pressure column 35 is connected to the outer pressure column 34 by a thread.

[0030] With this configuration, the inner pressure column 35 can be adjusted by thread to extend its length relative to the outer pressure column 34 to accommodate automotive seat frame parts 4 with different material thicknesses and concave through hole depths. This eliminates the need to replace the entire molding mechanism 3, improving mold versatility and debugging convenience, and making replacement easier.

[0031] Working principle: During operation, the sheet metal of the car seat frame 4 is placed on the lower die of the stamping die 2 and is clamped and positioned by the pressing device; the stamping machine 1 drives the upper die to move down with the slide block, and the forming mechanism 3 fixed on the upper die moves closer to the concave punching position on the sheet metal; in the initial state, the outer pressure column 34 is locked into the surface recess by the locking ball 51 under the action of the locking spring 52, and is axially locked with the pressure column 31, so that the forming seat 32, the retraction column 33, the outer pressure column 34 and the inner pressure column 35 form a synchronous downward movement as a whole; The forming seat 32 first contacts and presses into the sheet metal. Under the action of the sheet metal's plastic reaction force, the retraction column 33 retracts upward relative to the pressure column 31, and the first support spring 36 is compressed and stores energy. At the same time, the torsion guide block 72 on the inner wall of the pressure column 31 slides along the torsion guide groove 71 on the outer circular surface of the forming seat 32, guiding the forming seat 32 to rotate around its own axis by a set angle, so that the metal around the concave punch flows evenly and adheres to the mold surface under the combined action of pressing and micro-torsion, thereby dispersing local stress and suppressing wrinkles and tears that are prone to occur in the high-strength steel sheet during drawing. At this stage, the locking ball 51 still engages the outer pressure column 34, and the inner pressure column 35 does not extend, only completing the forming of the concave cavity. As the upper mold continues to descend, the pressure transmitted by the second support spring 37 to the external pressure column 34 pushes the support ring 61 down along the inner wall of the pressure column 31. The push rods 62 arrayed on the support ring 61 then drive the push spoon 63 to move upward, pushing the locking ball 51 out of the recess of the external pressure column 34 and releasing its axial locking. The limiting groove 53 forms a 60° angle with the horizontal plane, making it easy for the locking ball 51 to exit and unlock smoothly when it is subjected to the action of the push spoon 63. After the locking is released, the outer pressure column 34 continues to press down relative to the pressure column 31 under the elastic force of the second support spring 37. The inner pressure column 35, which is fixed to it, then extends to the bottom of the already formed concave shape to punch the sheet material and form a through hole on the bottom surface of the concave shape. Since the punching is carried out after the concave shape has been formed and the material is fully attached, the hole wall is subjected to uniform force, which effectively avoids the hole edge pulling and cracking caused by punching before forming. The first support spring 36 and the second support spring 37 adopt a conical structure and have non-linear stiffness during the compression stroke, so that the force values ​​of the forming and punching stages are smoothly transitioned. When the mold is opened and reset, the upper mold moves upward with the slider, each spring releases energy, the support ring 61 and the top spoon 63 fall back, and the locking ball 51 is re-engaged into the recess of the external pressure column 34 under the action of the locking spring 52. The forming mechanism 3 returns to the initial locked state and completes one working cycle.

[0032] All electronic components mentioned in this article are electrically connected to an external main controller and 220V AC mains power. The main controller can be a conventional, known device such as a computer. The electronic components, along with their associated control systems, power supply modules, circuits, and piping, can be provided by the manufacturer. Furthermore, all electronic components and control modules involved in this invention are existing technologies, fully capable of being implemented by those skilled in the art, and require no further explanation. This invention does not involve any improvement to the structure or usage of the electronic components.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A stamping apparatus for an automobile seat frame, comprising a stamping press (1) for providing stamping force and a stamping die (2) for forming an automobile seat frame component (4), characterized in that: It also includes a forming mechanism (3) for processing concave punches on the stamping die (2) and a locking mechanism (5), a release mechanism (6) and a torsion mechanism (7) for processing concave punches in stages. The forming mechanism (3) is installed on the stamping die (2) at the position corresponding to the concave punch of the car seat frame (4). The forming mechanism (3) is movably connected to the stamping die (2). An external pressure column (34) is installed on the top of the inner side of the pressure column (31) of the forming mechanism (3). The top of the external pressure column (34) cooperates with the stamping die (2). A retraction column (33) is cooperated with the bottom of the inner side of the pressure column (31) through a torsion mechanism (7). A forming seat (32) is installed at the bottom of the retraction column (33). An inner pressure column (35) is axially connected through the retraction column (33). The top of the retraction column (33) cooperates with the external pressure column (34) through a release mechanism (6) and a locking mechanism (5).

2. The automobile seat frame stamping device according to claim 1, characterized in that: The torsion mechanism (7) includes a torsion guide groove (71). The forming seat (32) is threaded to the bottom of the retraction column (33). The forming seat (32) has the same concave structure as the concave punch. The two torsion guide grooves (71) are symmetrically arranged on the outer circular surface of the forming seat (32). The inner wall of the pressure column (31) is formed with a torsion guide block (72) that matches the torsion guide groove (71). The top of the retraction column (33) matches the retaining ring at the center position of the pressure column (31) through a first support spring (36).

3. The automobile seat frame stamping device according to claim 2, characterized in that: The release mechanism (6) includes a support ring (61), which is slidably connected to the inner wall of the pressure column (31) and located below the retaining ring of the pressure column (31). The inner diameter of the support ring (61) is smaller than the inner diameter of the pressure column (31), and the outer diameter of the support ring (61) is larger than the outer diameter of the retraction column (33). Four push rods (62) are evenly arranged in an array on the top of the support ring (61) in the inner wall of the pressure column (31). The push rods (62) are slidably connected to the inner wall of the pressure column (31), and the top of the push rods (62) is formed with a top spoon (63) for unlocking the locking mechanism (5).

4. The automobile seat frame stamping device according to claim 3, characterized in that: The bottom of the external pressure column (34) is connected to the retaining ring on the pressure column (31) by the second support spring (37). The locking mechanism (5) includes a locking ball (51). The four locking balls (51) are evenly arranged in an array outside the external pressure column (34). In the initial state, the external pressure column (34) has a recess formed on the part corresponding to the locking ball (51). The pressure column (31) has a limiting groove (53) formed on the position corresponding to the locking ball (51). A locking spring (52) supporting the locking ball (51) is provided on the inner side of the limiting groove (53). The bottom of the locking ball (51) corresponds to the top spoon (63).

5. The automobile seat frame stamping device according to claim 4, characterized in that: The angle between the limiting groove (53) and the horizontal plane is 60°.

6. The automobile seat frame stamping device according to claim 4, characterized in that: Both the first support spring (36) and the second support spring (37) are conical springs.

7. The automobile seat frame stamping device according to claim 1, characterized in that: The inner pressure column (35) is connected to the outer pressure column (34) by a thread.

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