Dual-action draw-die forming apparatus

Abstract

The utility model relates to the field of die forming, disclose double -action draw -down male die forming equipment from top to bottom include gasket plate unit, male die unit, binder ring and bottom die unit in proper order, gasket plate unit includes and the inside gasket plate of inside sliding block fixed connection and with the outside gasket plate of outside sliding block fixed connection, binder ring is fixed at the bottom surface of outside gasket plate, male die unit includes connecting plate, elastic support part and at least one male die fixed in the bottom of connecting plate, the surface of binder ring is opened and can accommodate the slot of connecting plate, the bottom of slot is opened and is same with the male die and is used for the avoiding hole of passing through the perpendicular direction of relative male die, elastic support part includes a plurality of elastic reset parts arranged in the bottom of connecting plate, and the bottom surface of elastic reset part and the bottom surface of slot abut, the perpendicular direction of connecting plate and inside gasket plate are opposite and set up opposite, and binder ring and male die are pressed together on bottom die unit under the drive of outside gasket plate and inside gasket plate respectively to provide a kind of die forming equipment of simple and convenient clamping die.

Description

Technical Field

[0001] This utility model relates to the field of mold forming, specifically to a double-action drawing punch forming equipment. Background Technology

[0002] In the field of automotive body panel stamping, double-action drawing presses are widely used due to their unique double-slider structure. In traditional double-action drawing die structures, the punch needs to be rigidly fixed to the inner slide of the press, the blank holder is fixed to the outer slide, and the die is installed on the lower worktable. During operation, the outer slide drives the blank holder to press down first to form an anti-wrinkle constraint on the edge of the sheet metal, and then the inner slide drives the punch to move down to complete the drawing process. However, with the increasing complexity of automotive styling and the growing demand for small parts, this structure has exposed the following key defects: when the size of the punch part is small, the distance between the punch mounting surface and the edge of the press slide is too far, increasing the time spent on the clamping process and seriously affecting production efficiency. Especially when multiple punch parts are installed on the same inner slide, multiple bolts are needed to support the punch parts and fix them during the installation process, which is not conducive to ensuring the stability of the punch parts. For example, in the patent document with publication number CN215544250U, the first and second dies need to be fixed on the upper die holder, making each installation and disassembly cumbersome. Utility Model Content

[0003] The present invention aims to provide a double-action drawing punch forming device, which provides a mold forming device with simple mold clamping.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a double-action drawing punch forming device, comprising, from top to bottom, a pad unit, a punch unit, a blank holder ring, and a bottom die unit. The pad unit includes an inner pad plate fixedly connected to the inner slider and an outer pad plate fixedly connected to the outer slider. The blank holder ring is fixed to the bottom surface of the outer pad plate. The punch unit includes a connecting plate, an elastic support part, and at least one punch fixed to the bottom of the connecting plate. The upper surface of the blank holder ring has a slot that can accommodate the connecting plate. The bottom of the slot has clearance holes, the same number as the number of punches, that allow passage in the perpendicular direction relative to the punches. The elastic support part includes several elastic reset members disposed at the bottom of the connecting plate, and the bottom surface of the elastic reset members abuts against the bottom surface of the slot. The connecting plate is vertically opposite to the inner pad plate. The blank holder ring and the punch are pressed onto the bottom die unit under the pushing of the outer pad plate and the inner pad plate, respectively.

[0005] The beneficial effects of this plan are: The power source in this technical solution consists of an inner slider and an outer slider. The inner pad is fixedly connected to the inner slider, and the outer pad is also fixedly connected to the outer slider. The pressure ring, driven by the outer pad, first slides downwards and presses against the bottom die unit, forming an anti-wrinkle constraint on the edge of the sheet material, effectively preventing wrinkling or deformation during the drawing process. Then, the inner pad pushes the connecting plate and punch downwards, passing through the clearance hole and pressing against the bottom die unit to complete the drawing process. The structure is stable and the power transmission is uniform, ensuring the geometry and strength of the formed part. After forming, the inner pad is reset under the drive of the inner slider, the punch unit is reset under the support of the elastic support, and finally, the pressure ring is reset under the drive of the outer pad. The reset process is performed in stages, with high coordination and smoothness. The elastic reset component ensures that the punch and connecting plate can quickly reset after drawing, improving the smoothness of the work rhythm.

[0006] By setting the connecting plate to not be directly connected to the inner pad plate as described above, the punch can be pre-installed inverted and fastened on one side. After the installation is completed, it is placed on the slot. This avoids the complicated operation of manually installing it directly onto the inner pad plate. The entire assembly or disassembly can be completed quickly during the installation process, reducing the difficulty of operation and time cost. On the other hand, it also ensures the stability of the bolt fastening.

[0007] Preferably, as an improvement, the bottom mold unit includes a bottom pad and a number of dies fixed to the bottom pad, the same as the number of punches, with the dies and corresponding punches facing each other in the vertical direction.

[0008] The beneficial effects are as follows: the die is fixed on the bottom pad, forming a stable overall structural support for the sheet metal, which can withstand the high pressure generated during the drawing process and avoid deformation or loosening. The die provides a support surface for the geometry of the formed part, ensuring uniform flow of the sheet metal during the drawing process and preventing wrinkling or cracking.

[0009] Preferably, as an improvement, the punch slides into the vertically opposite clearance hole.

[0010] The beneficial effect is that the clearance hole provides a guiding function for the punch, so that the punch maintains the perpendicularity of the direction of movement during the drawing process.

[0011] Preferably, as an improvement, it includes at least two punches, and at least one elastic reset element is provided between adjacent punches.

[0012] The beneficial effects are as follows: by setting up elastic reset members between adjacent punches, a balancing effect is achieved, which avoids the punches from tilting or becoming unstable on one side during the force process, thereby improving the overall balance and reliability of the structure. The second elastic support provides additional reset assistance, especially when multiple punches are working together, to avoid uneven or abnormal reset due to single-point failure. At the same time, when the inner pad slides down to compress the elastic reset members and pushes the punches, the elastic reset members also transmit downward pressure to the pressure ring, further ensuring the effect of the pressure ring.

[0013] Preferably, as an improvement, the elastic reset element is a nitrogen spring, comprising at least four nitrogen springs respectively disposed at the four corners of the connecting plate.

[0014] The beneficial effects are as follows: Four nitrogen springs are respectively set at the four corners of the connecting plate to form a uniform support layout, which can balance the force on the punch and ensure that it maintains vertical movement during the reset process, avoiding tilting or jamming. The nitrogen springs have strong elastic restoring force and fast response speed, which can quickly push the punch and connecting plate to reset, greatly improving the working efficiency of the drawing forming equipment.

[0015] Preferably, as an improvement, the axial length of the natural height of the elastic reset member is less than the height of the punch.

[0016] The beneficial effects are: the bottom of the punch can be located in the clearance hole, which makes it easier to ensure the smoothness of vertical reciprocating sliding, while avoiding wear caused by friction between the bottom edge of the punch and the upper surface of the clearance hole.

[0017] Preferably, as an improvement, the punch slides into the inner wall of the clearance hole, and sliding guide blocks are arrayed on the side of the punch, and sliding guide blocks that cooperate with the sliding guide blocks are fixedly provided on the inner wall of the clearance hole.

[0018] The beneficial effects are: the sliding guide blocks are distributed on the sides around the punch, which can provide stable multi-point guiding support, ensuring that the punch maintains vertical movement during the forming process and avoiding errors caused by offset.

[0019] Preferably, as an improvement, the clearance hole is provided with multiple grooves in the circumference, and the grooves are all set on the bottom surface of the slot, and a buffer block is fixed in each groove.

[0020] The beneficial effects are: preventing the punch from being chipped or damaged when it enters the clearance hole and comes into contact with the edge of the clearance hole, ensuring the integrity of the punch surface and guaranteeing the drawing quality.

[0021] Preferably, as an improvement, the buffer block is made of polyurethane. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the connecting plate structure in an embodiment of the present utility model; Figure 4 This is a top side view of the pressure ring in an embodiment of this utility model.

[0023] The reference numerals in the accompanying drawings include: pressure ring 1, inner pad 2, outer pad 3, connecting plate 4, punch 5, clearance hole 6, slot 7, elastic reset part 8, die 9, bottom pad 10, sliding guide block 11, and buffer block 12. Detailed Implementation

[0024] The following detailed description is provided through specific implementation methods and examples: The preferred embodiments of this utility model are basically as shown in the appendix. Figure 1-4 As shown, Figure 1 and Figure 2 The double-action drawing punch forming equipment shown includes, from top to bottom, a pad unit, a punch unit, a blank holder ring 1, and a bottom die unit. The pad unit includes an inner pad 2 fixedly connected to the inner slider and an outer pad 3 fixedly connected to the outer slider. The fixing methods are varied, such as bolt fixing or welding fixing. In this technical solution, multiple bolts are used for fixing to ensure the stability of the connection. The blank holder ring 1 is fixed to the bottom surface of the outer pad 3. The punch unit includes a connecting plate 4, an elastic support part, and at least one punch 5 fixed to the bottom of the connecting plate 4. The upper surface of the blank holder ring 1 has a slot 7 that can accommodate the connecting plate 4. The bottom of the slot 7 has the same number of clearance holes 6 as the punches 5, allowing passage in a perpendicular direction relative to the punches 5. The punches 5 slide with the perpendicularly opposite clearance holes 6, which provide a guiding function for the punches 5, ensuring that the punches 5 maintain a perpendicular direction of movement during the drawing forming process. In this preferred embodiment, the elastic support part can bear the weight of the connecting plate 4 and the multiple punches 5.

[0025] like Figure 3 As shown, the elastic support includes several elastic reset members 8 disposed at the bottom of the connecting plate 4, and the bottom surface of the elastic reset member 8 abuts against the bottom surface of the slot 7. To ensure the stability of the reset, the preferred embodiment of this utility model is that the elastic reset member 8 is a nitrogen spring, including at least four nitrogen springs respectively disposed at the four corners of the connecting plate 4. The top surface of the nitrogen spring is bolted to the connecting plate 4. The four nitrogen springs are respectively disposed at the four corners of the connecting plate 4 to form a uniform support layout, which can balance the force on the punch 5 and ensure that it maintains vertical movement during the reset process, avoiding tilting or jamming. The nitrogen spring has strong elastic restoring force and fast response speed, which can quickly push the punch 5 and the connecting plate 4 to reset, greatly improving the working efficiency of the drawing forming equipment.

[0026] The connecting plate 4 is vertically opposite to the inner pad plate 2. The pressure ring 1 and the punch 5 can be pressed onto the bottom mold unit by the pushing of the outer pad plate 3 and the inner pad plate 2, respectively. In order to make the structure simple, reliable and easy to assemble, the preferred embodiment of this utility model is that the bottom mold unit includes a bottom pad plate 10 and a die 9, which is the same number as the punch 5 and fixed on the bottom pad plate 10. The die 9 and the corresponding punch 5 are vertically opposite each other. The die 9 is fixed on the bottom pad plate 10, forming a stable overall structural support for the sheet metal. It can withstand the high pressure generated during the drawing process and avoid deformation or loosening. The die 9 provides a support surface for the geometry of the formed part, ensuring uniform flow of the sheet metal during the drawing process and preventing wrinkling or cracking.

[0027] The power source in this technical solution consists of an inner slider and an outer slider. The inner pad 2 is fixedly connected to the inner slider, and the outer pad 3 is fixedly connected to the outer slider. The pressure ring 1, driven by the outer pad 3, first slides downward and presses against the bottom die unit, forming an anti-wrinkle constraint on the edge of the sheet material, effectively preventing wrinkling or deformation of the sheet material during the drawing process. Then, the inner pad 2 pushes the connecting plate 4 and the punch 5 downward and slides through the clearance hole 6 to press against the bottom die unit to complete the drawing process. The structure is stable and the power transmission is uniform, ensuring the geometry and strength of the formed part. After forming, the inner pad 2 is reset under the drive of the inner slider, the punch unit is reset under the support of the elastic support, and finally the pressure ring 1 is reset under the drive of the outer pad 3. The reset process is carried out in stages, with high coordination and smoothness. The elastic reset component 8 ensures that the punch 5 and the connecting plate 4 can be quickly reset after the drawing is completed, improving the smoothness of the work rhythm.

[0028] By setting the connecting plate 4 to not be directly connected to the inner pad plate 2, when installing the punch 5, it can be pre-installed inverted and fastened on one side. After the installation is completed, it is placed on top of the slot 7. On the one hand, this avoids the complicated operation of manually installing it directly onto the inner pad plate 2. During the installation process, it can be quickly assembled or disassembled as a whole, reducing the difficulty of operation and time cost. On the other hand, it can also ensure the stability of the bolt fastening.

[0029] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention includes at least two punches 5, with at least one elastic reset member 8 between adjacent punches 5. The elastic reset member 8 between adjacent punches 5 provides a balancing effect, preventing the punches 5 from tilting or becoming unstable on one side during the stress process, thus improving the overall balance and reliability of the structure. The second elastic support provides additional reset assistance, especially when multiple punches 5 are working together, preventing uneven or abnormal reset due to single-point failure. At the same time, when the inner pad 2 slides down to compress the elastic reset member 8 and pushes the punches 5, the elastic reset member 8 also transmits downward pressure to the pressure ring 1, further ensuring the effect of the pressure ring.

[0030] To ensure the smooth sliding of the punch 5, the preferred embodiment of this invention is as follows: Figure 3 As shown, sliding guide blocks 11 are arrayed on the sides of the punch 5 that slide with the clearance hole 6. Sliding guide blocks 11 that cooperate with the sliding guide blocks 11 on the surface of the punch 5 are also provided inside the clearance hole 6. The sliding guide blocks 11 are distributed around the punch 5, providing stable multi-point guiding support to ensure the punch 5 maintains vertical movement during the forming process and avoids errors caused by offset. To ensure the smooth sliding of the punch 5, the preferred embodiment of this invention is that the axial length of the natural height of the elastic reset member 8 is less than the height of the punch 5, and the bottom of the punch 5 is located in the clearance hole 6. This facilitates smooth vertical reciprocating sliding while preventing wear caused by friction between the bottom edge of the punch 5 and the upper surface of the clearance hole 6.

[0031] like Figure 4 As shown, to ensure the surface quality of the punch 5, multiple grooves are provided around the clearance hole 6. The grooves are all set on the bottom surface of the slot 7. A buffer block 12 is fixed in each groove to prevent the punch 5 from being bitten or damaged when it enters the clearance hole 6 and comes into contact with the edge of the clearance hole 6, thus ensuring the integrity of the surface of the punch 5 and guaranteeing the drawing quality. To ensure a long-term buffering effect, the buffer block 12 in this utility model is made of polyurethane.

[0032] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A double-action drawing punch forming device, comprising, from top to bottom, a pad unit, a punch unit, a blank holder (1), and a bottom die unit, wherein the pad unit includes an inner pad (2) fixedly connected to the inner slider and an outer pad (3) fixedly connected to the outer slider, characterized in that: The pressure ring (1) is fixed on the bottom surface of the outer pad (3). The punch unit includes a connecting plate (4), an elastic support part, and at least one punch (5) fixed on the bottom of the connecting plate (4). The upper surface of the pressure ring (1) has a slot (7) that can accommodate the connecting plate (4). The bottom of the slot (7) has the same number of clearance holes (6) as the punch (5) that allow the punch (5) to pass through in a vertical direction. The elastic support part includes several elastic reset parts (8) provided at the bottom of the connecting plate (4). The bottom surface of the elastic reset part (8) abuts against the bottom surface of the slot (7). The connecting plate (4) is vertically opposite to the inner pad (2). The pressure ring (1) and the punch (5) are pressed onto the bottom mold unit by the push of the outer pad (3) and the inner pad (2), respectively.

2. The dual-action drawing punch forming equipment according to claim 1, characterized in that: The bottom mold unit includes a bottom pad (10) and a die (9) that is the same number as the punch (5) and fixed on the bottom pad (10). The die (9) and the corresponding punch (5) are opposite each other in the vertical direction.

3. The double-action drawing punch forming equipment according to claim 1, characterized in that: The punch (5) slides into the vertically opposite clearance hole (6).

4. The double-action drawing punch forming equipment according to claim 1, characterized in that: It includes at least two punches (5), and at least one elastic reset member (8) is provided between adjacent punches (5).

5. The double-action drawing punch forming equipment according to claim 1, characterized in that: The elastic reset component (8) is a nitrogen spring, including at least four nitrogen springs respectively located at the four corners of the connecting plate (4).

6. The double-action drawing punch forming equipment according to claim 1, characterized in that: The axial length of the natural height of the elastic reset member (8) is less than the height of the punch (5).

7. The double-action drawing punch forming equipment according to claim 1, characterized in that: The punch (5) slides with the inner wall of the clearance hole (6). Sliding guide blocks (11) are arranged in an array on the side of the punch. The inner wall of the clearance hole (6) is fixed with a sliding guide block that slides with the sliding guide block (11).

8. The double-action drawing punch forming equipment according to claim 1, characterized in that: Multiple grooves are provided around the clearance hole (6), and the grooves are all located on the bottom surface of the slot (7). A buffer block (12) is fixed in each groove.

9. The double-action drawing punch forming equipment according to claim 8, characterized in that: The buffer block (12) is made of polyurethane.

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