A press device for processing automobile parts

Abstract

This invention provides a pressure-stabilizing stamping die device for processing automotive parts, belonging to the technical field of automotive parts processing molds. The device includes an upper die plate, a lower die plate, a bottom support plate, an upper die assembly, and a lower punch assembly. A first nitrogen spring, a second nitrogen spring, and a third nitrogen spring are fixed on the bottom support plate. The first nitrogen spring is located at both ends of the bottom support plate, with its upper end connected to both ends of the upper die plate. The upper end of the second nitrogen spring passes through a drawing and pressing plate and abuts against a wear-resistant block. The first and second nitrogen springs are connected by an air pipe. The upper end of the third nitrogen spring is connected to the lower end of the drawing and pressing plate. Connecting the first and second nitrogen springs through the air pipe enables coordinated adjustment of the stamping pressure. When the downward pressure of the upper die plate is too high, nitrogen can flow between the two nitrogen springs, reducing the pressure of the corner pressure plate in the reverse direction, effectively preventing the material from failing to flow into the cavity due to excessive pressure.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts processing mold technology, and relates to a pressure-stabilizing stamping mold device for processing automotive parts. Background Technology

[0002] In the stamping process of automotive parts, the pressure control of the stamping die directly affects the forming effect of the automotive parts. Especially in the drawing and stamping processes of complex automotive parts, the stability of the downward pressure of the upper die is the key to ensuring that the material flows smoothly into the cavity and avoiding cracking, wrinkling and poor forming of the stamped parts.

[0003] In existing automotive part stamping dies, nitrogen springs are mostly set independently, without a pressure linkage adjustment structure between the individual nitrogen springs. When the downward pressure of the upper die plate is too high during the stamping process, it will cause a sudden increase in the pressure of the corner pressure plate of the die, which will hinder the flow of the processed material into the cavity. This will prevent the corners of the automotive parts from being fully formed, reducing the product qualification rate. At the same time, the design of the die-punch mating structure of traditional stamping dies is not reasonable enough, and the lack of precise positioning and clamping structure will further affect the forming accuracy of the stamped parts.

[0004] To address the aforementioned technical issues, there is an urgent need to design a stamping die device with pressure linkage and stabilization function to achieve automatic pressure adjustment during the stamping process, avoid material flow obstruction caused by excessive pressure on the corner pressure plates, and optimize the mating structure of the punch and die to improve the accuracy and yield of automotive parts stamping. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a pressure-stabilizing stamping die device for processing automotive parts. This device solves the technical problems of uncontrollable pressure in existing automotive part stamping dies, excessive pressure on corner pressure plates leading to obstructed material flow, and low forming accuracy of stamped parts. It achieves automatic pressure adjustment during the stamping process, ensuring smooth material flow into the cavity, while simultaneously improving the stamping accuracy of automotive parts and the service life of the die.

[0006] To achieve the above-mentioned objectives, this invention provides a pressure-stabilizing stamping die device for processing automotive parts, comprising an upper die plate, a lower die plate, a bottom support plate, an upper die assembly, and a lower punch assembly. The upper die assembly is fixed to the lower end of the upper die plate. The lower punch assembly includes several outer pressure plates, corner pressure plates, and a core block. The core block is fixed to the lower die plate, and a drawing and pressing plate is fitted over the core block. The several outer pressure plates and four corner pressure plates are arranged around the core block and fit against the peripheral wall of the core block. Wear-resistant blocks are fixed to the lower ends of the four corner pressure plates. The outer pressure plate and the wear-resistant block are both embedded in the drawing and pressing plate; the lower template is fixedly connected to the bottom support plate, and a first nitrogen spring, a second nitrogen spring and a third nitrogen spring are fixed on the bottom support plate. The first nitrogen spring is located at both ends of the bottom support plate, and the upper end of the first nitrogen spring is connected to both ends of the upper template. The upper end of the second nitrogen spring passes through the drawing and pressing plate and abuts against the wear-resistant block. The first nitrogen spring and the second nitrogen spring are connected through an air pipe, and the upper end of the third nitrogen spring is connected to the lower end of the drawing and pressing plate.

[0007] When the downward pressure of the upper mold plate is too high, causing the pressure of the upper die assembly on the four corner pressure plates to be too high and hindering the material from flowing into the cavity, the nitrogen in the second nitrogen spring can flow into the cylinder of the first nitrogen spring through the air pipe, increasing the air pressure in the cylinder of the first nitrogen spring, thereby reducing the downward pressure of the upper mold plate in the opposite direction, realizing the automatic reduction of the pressure of the corner pressure plates, and ensuring that the material flows smoothly into the cavity.

[0008] Furthermore, the upper die assembly includes two central concave blocks and edge concave blocks surrounding the central concave blocks. The height of the central concave blocks is greater than the height of the edge concave blocks. A raised clamping strip is provided on the working surface of the edge concave blocks, and a strip-shaped groove that mates with the clamping strip is formed on the working surface of the lower punch assembly. The engagement of the clamping strip with the strip-shaped groove improves the positioning accuracy and clamping effect during punching.

[0009] Furthermore, there are four nitrogen springs, with two symmetrically arranged on each side of the bottom support plate to ensure uniform force on the upper template and improve the stability of pressure reverse adjustment.

[0010] Furthermore, there are four second nitrogen springs, which correspond one-to-one with the number and position of the wear-resistant blocks, ensuring that each corner pressure plate can receive precise pressure adjustment and avoiding the problem of excessive pressure on a single corner pressure plate.

[0011] Furthermore, the number of the third nitrogen springs is 6 or 8, which provides stable support for the drawing and pressing plate and ensures the positional stability of the drawing and pressing plate during the stamping process.

[0012] Furthermore, a pressure gauge is installed on the air pipe for real-time monitoring of air pressure. The pressure gauge can monitor the air pressure value in the air pipe in real time, allowing operators to keep track of the pressure status of the nitrogen spring and facilitating mold debugging and maintenance.

[0013] Furthermore, the drawing and pressing plate has a lifting groove, and the wear-resistant block can be embedded in the lifting groove and slide up and down along the lifting groove.

[0014] Furthermore, the outer pressure plate is fixed to the drawing and pressing plate by bolts, and the corner pressure plate is fixed to the wear-resistant block by bolts. The bottom of the outer pressure plate and the corner pressure plate are provided with T-slots, and the drawing and pressing plate and the wear-resistant block are provided with T-shaped positioning blocks that can be inserted into the T-slots.

[0015] Furthermore, the core block has multiple protruding guide sliders on its side, and guide grooves are opened on the inner wall of the drawing clamping plate. The guide sliders are embedded in the guide grooves and slide along the guide grooves. Under the pressure of the upper die assembly, the drawing clamping plate descends until the upper end of the guide groove abuts against the guide slider. The air pressure in the third nitrogen spring cylinder increases. After the material sheet drawing operation is completed, the upper die plate rises, and under the action of the third nitrogen spring, the drawing clamping plate is lifted up to facilitate unloading.

[0016] The sheet material to be processed is placed onto the lower punch assembly. The hydraulic press is started, driving the upper die plate to descend. Because the first nitrogen spring is initially compressed by the lower die plate, the air pressure inside the second nitrogen spring rises, causing the corner pressure plates to be further lifted and first contact the edge recesses, firmly pressing the sheet material down. The lower die plate continues to descend, and the protruding part of the core block pushes upward into the central recess. The sheet material not pressed in the middle is forcibly stretched, gradually conforming to the shape of the part along the cavity. The outer material slowly flows into the cavity, completing the drawing process. During the drawing process, the pressure of each second nitrogen spring remains consistent. If the downward pressure of the edge recesses is too high, the nitrogen in the second nitrogen springs flows through the air pipe to the first nitrogen springs, reducing the pressure on the corner pressure plates. This achieves automatic adjustment of the stamping pressure, effectively preventing the material from failing to flow into the cavity due to excessive pressure, significantly improving the forming qualification rate of automotive parts. The pressure status of the nitrogen springs can be easily monitored in real time by the operator using a pressure gauge.

[0017] Compared with existing technologies, this pressure-stabilizing stamping die device for processing automotive parts has the following advantages:

[0018] 1. Pressure linkage and stabilization ensure material flow. The first and second nitrogen springs are connected by an air pipe, realizing the linkage and automatic adjustment of the stamping pressure. When the downward pressure of the upper template is too high, nitrogen can flow between the two nitrogen springs to reduce the pressure of the corner pressure plate in the opposite direction. This effectively avoids the problem that the material cannot flow into the cavity due to excessive pressure, and greatly improves the molding qualification rate of automotive parts.

[0019] 2. High precision fit and good stamping effect: The edge concave block of the upper die assembly is equipped with a clamping strip, and the lower punch assembly is correspondingly provided with a strip groove. The die and the punch achieve precise positioning and clamping during the stamping process through the precise fit between the clamping strip and the strip groove, which improves the stamping precision of automotive parts.

[0020] 3. The structure is reasonably designed and the force is uniform. The first nitrogen spring is symmetrically arranged, the second nitrogen spring corresponds to the wear-resistant block, and the third nitrogen spring provides stable support for the drawing and pressing plate. The force structure of the entire mold device is reasonably designed, which ensures the uniformity of the force on each component during the stamping process and improves the working stability of the mold.

[0021] 4. Wear-resistant and durable, extending mold life. Wear-resistant blocks are fixed at the lower end of the corner pressure plate, which effectively reduces the wear of the corner pressure plate during the stamping process, improves the service life of the corner pressure plate, and thus reduces the maintenance cost of the mold.

[0022] 5. Real-time air pressure monitoring facilitates debugging and maintenance. A pressure gauge is installed on the air pipe to monitor the air pressure status of the nitrogen spring in real time. Staff can adjust and maintain the mold in a timely manner according to the pressure gauge reading to ensure that the mold is always in the best working condition. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the pressure-stabilizing stamping die device for processing automotive parts.

[0024] Figure 2 This is a cross-sectional view of the pressure-stabilizing stamping die device for processing automotive parts.

[0025] Figure 3 This is a structural diagram of the upper template.

[0026] Figure 4 This is a view of the back of the upper die assembly.

[0027] Figure 5 This is a front view of the upper die assembly.

[0028] Figure 6 This is a schematic diagram of the assembly structure of the lower template and the bottom support plate.

[0029] Figure 7 This is a structural diagram of the template.

[0030] Figure 8 This is a schematic diagram of the internal structure of the template.

[0031] Figure 9 A schematic diagram of the trachea.

[0032] Figure 10 This is a schematic diagram of the front structure of the drawing and pressing plate.

[0033] Figure 11 This is a schematic diagram of the back structure of the drawing and pressing plate.

[0034] Figure 12 This is a structural schematic diagram of the lower punch assembly.

[0035] Figure 13 This is a schematic diagram of the chip structure.

[0036] In the diagram, 1. Upper template; 2. Lower template; 3. Bottom support plate; 4. Upper die assembly; 41. Central recess; 42. Edge recess; 43. Pressing strip; 5. Lower punch assembly; 51. Outer pressure plate; 52. Corner pressure plate; 53. Core block; 54. Strip groove; 55. T-slot; 56. Guide block; 6. Drawing pressing plate; 61. Lifting groove; 62. T-positioning block; 63. Guide groove; 7. Wear-resistant block; 8. First nitrogen spring; 9. Second nitrogen spring; 10. Third nitrogen spring; 12. Gas pipe; 13. Pressure gauge. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0038] like Figure 1-13 As shown, this pressure-stabilizing stamping die device for processing automotive parts includes an upper die plate 1, a lower die plate 2, a bottom support plate 3, an upper die assembly 4, and a lower punch assembly 5. The upper die assembly 4 is fixed to the lower end of the upper die plate 1. The lower punch assembly 5 includes several outer pressure plates 51, corner pressure plates 52, and a core block 53. The core block 53 is fixed to the lower die plate 2, and a drawing and pressing plate 6 is fitted over the core block 53. The several outer pressure plates 51 and the four corner pressure plates 52 are arranged around the core block 53 and fit against the peripheral wall of the core block 53. Wear-resistant blocks 7 are fixed to the lower ends of the four corner pressure plates 52. Plate 51 and wear-resistant block 7 are both embedded in the drawing and pressing plate 6; the lower template 2 is fixedly connected to the bottom support plate 3, and the bottom support plate 3 is fixed with a first nitrogen spring 8, a second nitrogen spring 9 and a third nitrogen spring 10. The first nitrogen spring 8 is located at both ends of the bottom support plate 3, and the upper end of the first nitrogen spring 8 is connected to both ends of the upper template 1. The upper end of the second nitrogen spring 9 passes through the drawing and pressing plate 6 and abuts against the wear-resistant block 7. The first nitrogen spring 8 and the second nitrogen spring 9 are connected through the air pipe 12. The upper end of the third nitrogen spring 10 is connected to the lower end of the drawing and pressing plate 6.

[0039] When the downward pressure of the upper template 1 is too high, causing the pressure of the upper die assembly 4 on the four corner pressure plates 52 to be too high and hindering the material from flowing into the cavity, the nitrogen in the second nitrogen spring 9 can flow into the cylinder of the first nitrogen spring 8 through the air pipe 12, increasing the air pressure in the cylinder of the first nitrogen spring 8, thereby reducing the downward pressure of the upper template 1 in the opposite direction, realizing the automatic reduction of the pressure of the corner pressure plates 52, and ensuring that the material flows smoothly into the cavity.

[0040] The upper die assembly 4 includes two central concave blocks 41 and edge concave blocks 42 surrounding the central concave blocks 41. The height of the central concave blocks 41 is greater than the height of the edge concave blocks 42. A raised clamping strip 43 is provided on the working surface of the edge concave blocks 42. A strip-shaped groove 54 that cooperates with the clamping strip 43 is provided on the working surface of the lower punch assembly 5. The positioning accuracy and clamping effect of the punch and die during stamping are improved through the interlocking cooperation between the clamping strip 43 and the strip-shaped groove 54.

[0041] There are four first nitrogen springs 8, with two symmetrically arranged on each side of the bottom support plate 3 to ensure uniform force distribution on the upper template 1 and improve the stability of pressure reverse adjustment. There are four second nitrogen springs 9, corresponding one-to-one with the number and position of the wear-resistant blocks 7, ensuring precise pressure adjustment for each corner pressure plate 52 and preventing excessive pressure on a single corner pressure plate 52. There are six or eight third nitrogen springs 10, providing stable support for the drawing and pressing plate 6 and ensuring its positional stability during the stamping process.

[0042] A pressure gauge 13 is installed on the air pipe 12 for real-time monitoring of air pressure. The pressure gauge 13 can monitor the air pressure value in the air pipe 12 in real time, which makes it convenient for the staff to keep track of the pressure status of the nitrogen spring and facilitates the debugging and maintenance of the mold.

[0043] The drawing and pressing plate 6 has a lifting groove 61, and the wear-resistant block 7 can be embedded in the lifting groove 61 and slide up and down along the lifting groove 61. The outer pressure plate 51 is fixed to the drawing and pressing plate 6 with bolts, and the corner pressure plate 52 is fixed to the wear-resistant block 7 with bolts. The bottom of the outer pressure plate 51 and the corner pressure plate 52 has a T-shaped groove 55, and the drawing and pressing plate 6 and the wear-resistant block 7 have T-shaped positioning blocks 62 that are inserted into the T-shaped groove 55.

[0044] The core block 53 has multiple protruding guide sliders 56 on its side. The inner wall of the drawing clamping plate 6 has a guide groove 63, and the guide sliders 56 are embedded in the guide groove 63 and slide along the guide groove 63. Under the pressure of the upper die assembly 4, the drawing clamping plate 6 descends until the upper end of the guide groove 63 abuts against the guide slider 56. Since the upper end of the third nitrogen spring 10 passes through the lower die plate 2 and abuts against the drawing clamping plate 6, the air pressure in the cylinder of the third nitrogen spring 10 increases. After the material plate drawing operation is completed, the upper die plate 1 rises, and under the action of the third nitrogen spring 10, the drawing clamping plate 6 is lifted up to facilitate unloading.

[0045] The drawing process is as follows: The sheet material to be processed is placed on the lower punch assembly 5. The hydraulic press is started, driving the upper die plate 1 to descend. As the first nitrogen spring 8 is first squeezed by the lower die plate 2, the air pressure in the second nitrogen spring 9 rises, causing the corner pressure plate 52 to be further lifted and first come into contact with the edge recess 42, firmly pressing the sheet material down. The lower die plate 2 continues to descend, and the protruding part of the core block 53 pushes upward into the central recess 41. The sheet material that is not pressed in the middle is forcibly stretched and gradually conforms to the shape of the part along the cavity. The outer material slowly flows into the cavity, completing the drawing process. During the drawing process, the pressure of each second nitrogen spring 9 is kept consistent. If the downward pressure of the edge recess 42 is too high, the nitrogen in the second nitrogen spring 9 flows to the first nitrogen spring 8 through the air pipe 12, which in turn reduces the pressure on the corner pressure plate 52. This realizes the linkage and automatic adjustment of the stamping pressure, effectively avoiding the problem that the material cannot flow into the cavity due to excessive pressure, and greatly improving the forming qualification rate of automotive parts. Throughout the process, pressure gauge 13 allows staff to easily monitor the pressure status of the nitrogen spring in real time.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A pressure-stabilizing stamping die device for processing automotive parts, comprising an upper die plate (1), a lower die plate (2), a bottom support plate (3), an upper die assembly (4), and a lower punch assembly (5), characterized in that, The upper die assembly (4) is fixed to the lower end of the upper template (1). The lower punch assembly (5) includes several outer pressure plates (51), corner pressure plates (52), and a core block (53). The core block (53) is fixed to the lower template (2). The core block (53) is covered by a drawing clamping plate (6). Several outer pressure plates (51) and four corner pressure plates (52) are arranged around the core block (53) and fit against the periphery of the core block (53). Wear-resistant blocks (7) are fixed to the lower ends of the four corner pressure plates (52). The outer pressure plates (51) and wear-resistant blocks (7) are embedded in the drawing clamping plate (6). The lower template (2) is fixed to the bottom support plate (3). The bottom support plate (3) is fixed with a first nitrogen spring (8), a second nitrogen spring (9) and a third nitrogen spring (10). The first nitrogen spring (8) is located at both ends of the bottom support plate (3). The upper end of the first nitrogen spring (8) is connected to both ends of the upper template (1). The upper end of the second nitrogen spring (9) passes through the drawing and pressing plate (6) and abuts against the wear-resistant block (7). The first nitrogen spring (8) and the second nitrogen spring (9) are connected together through the air pipe (12). The upper end of the third nitrogen spring (10) is connected to the lower end of the drawing and pressing plate (6). The drawing and pressing plate (6) has a lifting groove (61). The wear-resistant block (7) can be embedded in the lifting groove (61) and slide up and down along the lifting groove (61).

2. The pressure-compensated stamping die apparatus for processing an automotive part according to claim 1, wherein The upper die assembly (4) includes two central concave blocks (41) and an edge concave block (42) surrounding the central concave blocks (41). The height of the central concave blocks (41) is greater than the height of the edge concave blocks (42). A raised pressing strip (43) is provided on the working surface of the edge concave blocks (42). A strip-shaped groove (54) that cooperates with the pressing strip (43) is provided on the working surface of the lower die assembly (5).

3. The pressure compensated stamping die apparatus for processing automotive parts according to claim 1, wherein The first nitrogen spring (8) has 4 units, with 2 units arranged on each side of the bottom support plate (3).

4. The pressure compensated stamping die apparatus for processing automotive parts according to claim 1, wherein The second nitrogen spring (9) has 4 units, and the number and position of the wear-resistant blocks (7) correspond one-to-one.

5. The pressure compensated stamping die apparatus for processing automotive parts according to claim 1, wherein The third nitrogen spring (10) has 6 or 8 springs.

6. The pressure-stabilizing stamping die device for processing automotive parts according to claim 1, characterized in that, A pressure gauge (13) for real-time monitoring of air pressure is installed on the air pipe (12).

7. The pressure-stabilizing stamping die device for processing automotive parts according to claim 1, characterized in that, The outer pressure plate (51) is fixed to the drawing and pressing plate (6) by bolts, and the corner pressure plate (52) is fixed to the wear-resistant block (7) by bolts. The bottom of the outer pressure plate (51) and the corner pressure plate (52) has a T-shaped groove (55), and the drawing and pressing plate (6) and the wear-resistant block (7) have a T-shaped positioning block (62) that can be inserted into the T-shaped groove (55).

8. The pressure-stabilizing stamping die device for processing automotive parts according to claim 1, characterized in that, The core block (53) has multiple protruding guide blocks (56) on its side. The inner wall of the drawing and pressing plate (6) has a guide groove (63). The guide blocks (56) are embedded in the guide groove (63) and slide along the guide groove (63).

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