Delay release mechanism of upper die pressing plate of pressing die and pressing die
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2026-08-11
AI Technical Summary
[0003]然而，在生产实践中，传统压料料翻边模具的开模过程存在一个关键技术瓶颈：当上模压料板随上模抬升而快速卸力时，下压料板在氮气弹簧的驱动下，下压料板将发生同步上升运动
[0023]本实用新型的压料模具上模压料板延缓释放机构通过设置传动块、限位滑块、杠杠摆动件以及弹性抵接件等结构，实现了对上模压料板的延缓释放功能。在开模过程中，下模压料板与上模压料板同步上移，直至下模压料板复位后，下模压料板的限位滑块与上模压料板的对顶块在弹性锁定件的作用下仍保持锁定状态而对顶，从而延缓了上模压料板的释放，避免了因上模压料板快速卸力导致的零件形状畸变或损坏问题，显著提高了产品的尺寸精度和表面质量，降低了废品率，同时减少了材料损耗和生产成本，提升了生产效率和经济效益。
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Figure CN224614915U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pressing molds, and specifically discloses a pressing mold upper mold pressing plate delayed release mechanism and pressing mold. Background Technology
[0002] In automobile manufacturing and other industrial product processing, molds are the core process equipment for achieving precision forming of parts. Among them, drawing dies are widely used in the mass production of complex curved surface parts due to their excellent surface forming capabilities. The working principle of blanking and flanging dies is based on the coordinated movement of the upper and lower dies. Through the interaction force between the die surface and the sheet metal, the sheet metal is plastically deformed, ultimately obtaining a part with a specific geometric shape and dimensional accuracy.
[0003] However, in production practice, the opening process of traditional blanking and flanging dies has a key technical bottleneck: when the upper die blanking plate is lifted and rapidly depressed, the lower blanking plate, driven by a nitrogen spring, will move upward synchronously. This kinematic coupling effect causes the upper die blanking plate to be squeezed by the lower die blanking plate after the part is formed, leading to shape distortion of the product and even irreparable scrap. This technical defect not only seriously affects the dimensional accuracy and surface quality of the product, resulting in a decrease in the pass rate, but also significantly increases material waste and production costs, causing a double negative impact on the company's production efficiency and economic benefits. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a delayed release mechanism for the upper die pressing plate of a pressing mold and a pressing mold.
[0005] On the one hand, this utility model discloses a delayed release mechanism for the upper die pressing plate of a pressing mold, which adopts the following technical solution:
[0006] A delayed release mechanism for the upper die pressure plate of a pressure die is disclosed. The delayed release mechanism is disposed in the pressure die, which includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base, an upper die pressure plate elastically mounted on the upper die base via an upper die elastic connector, and a counter block mounted on the upper die pressure plate. The lower die assembly includes a lower die base, a lower die pressure plate elastically mounted on the lower die base via a lower die elastic connector, and a lower die punch mounted on the lower die base.
[0007] The delayed release mechanism is characterized in that it comprises:
[0008] A transmission block is disposed on the lower die pressure plate and can move longitudinally. The lower die pressure plate is equipped with a top elastic abutment member facing the top of the transmission block, and the lower die base is equipped with a bottom elastic abutment member facing the bottom of the transmission block. The top elastic abutment member and the bottom elastic abutment member drive the transmission block to move longitudinally through elastic abutment. The elastic force of the bottom elastic abutment member is greater than the elastic force of the top elastic abutment member, and the elastic force of the lower die elastic connecting member is greater than the elastic force of the upper die elastic connecting member.
[0009] A limiting slider is provided on the lower die pressing plate and can move laterally. The limiting slider is located on one side of the top block and can move to the bottom of the top block. The bottom of the top block is provided with an elastic locking member, and the top of the limiting slider is provided with a limiting groove for the elastic locking member to be inserted.
[0010] The lever swing member is axially connected to the lower die pressing plate. One end of the lever swing member is connected to the transmission block, and the other end of the lever swing member is connected to the limiting slider.
[0011] Preferably, the lever swing member includes a shaft connection part, a transverse swing arm part and a longitudinal swing arm part. The shaft connection part is provided with a rotating shaft that is shaft-connected to the lower die pressing plate. The longitudinal swing arm part is provided with a first swing arm round head. The limiting slider is provided with a first slide groove for assembling the first swing arm round head. The transverse swing arm part is provided with a second swing arm round head. The transmission block is provided with a second slide groove for assembling the second swing arm round head.
[0012] Preferably, the ratio of the distance L1 from the pivot of the lever swing member to the round head of the first swing arm to the distance L2 from the pivot to the round head of the second swing arm is 1.5 to 2.
[0013] Preferably, the included angle between the lateral swing arm and the longitudinal swing arm of the lever swing member is 90° to 120°.
[0014] Preferably, when the limiting slider moves to the bottom of the top block, the lever swing member rotates until the longitudinal swing arm is in the longitudinal direction.
[0015] Preferably, the upper die holder is provided with an upper die flanging cutter block, and the lower die punch is provided with a lower die flanging cutter holder that matches the upper die flanging cutter block.
[0016] Preferably, the elastic locking member includes: a spring-loaded pin and a rectangular spring for pre-compressing the spring-loaded pin.
[0017] Preferably, the upper mold elastic connector, lower mold elastic connector, top elastic abutment, and bottom elastic abutment are all nitrogen springs.
[0018] Preferably, when the sheet metal is pressed down by the upper mold assembly and moves the lower mold pressing plate down together, the transmission block contacts the bottom elastic abutment and overcomes the elastic force of the top elastic abutment. The shaft connection point of the lever swing member forms a longitudinal displacement with the transmission block, driving the lever swing member to rotate and push the limit slider to move laterally and press against the side of the top block.
[0019] When the pressing mold is closed, the limiting slider moves down with the lower mold pressing plate until it is separated from the side of the top block. The compressed bottom elastic abutment releases its elastic force and pushes the transmission block up. The transmission block drives the limiting slider to push into the bottom of the top block through the lever swinging component. The elastic locking component springs into the limiting groove to restrict the lateral movement of the limiting slider relative to the top block.
[0020] When the pressure die opens, the lower die elastic connector releases its elastic force first, pushing the lower die pressure plate and the upper die pressure plate to move upward synchronously until the lower die elastic connector fully releases its elastic force. Then, the limiting slider and the counter block remain locked and counter-aligned under the action of the elastic locking component. The upper die base continues to move upward until the upper die elastic connector fully releases its elastic force. Subsequently, the counter block of the upper die pressure plate leaves the limiting slider of the lower die base. The top elastic abutment component releases its elastic force to push the transmission block downward. The transmission block drives the limiting slider to move laterally and reset through the lever swing component.
[0021] On the other hand, this utility model discloses a pressing mold, including an upper mold assembly, a lower mold assembly, and the delayed release mechanism.
[0022] Compared with the prior art, the present invention has at least the following beneficial effects:
[0023] This utility model's delayed release mechanism for the upper die pressure plate of a pressure die achieves the delayed release function of the upper die pressure plate by incorporating a transmission block, a limiting slider, a lever swinging component, and an elastic abutment component. During the die opening process, the lower die pressure plate moves upward synchronously with the upper die pressure plate. Even after the lower die pressure plate resets, the limiting slider of the lower die pressure plate and the opposing block of the upper die pressure plate remain locked together under the action of the elastic locking component, thus delaying the release of the upper die pressure plate. This avoids part shape distortion or damage caused by rapid unloading of the upper die pressure plate, significantly improving the dimensional accuracy and surface quality of the product, reducing the scrap rate, and simultaneously reducing material waste and production costs, thereby increasing production efficiency and economic benefits. Attached Figure Description
[0024] Figure 1-6 This is a schematic diagram of the mold closing and opening process of the pressure mold and the upper mold pressure plate delayed release mechanism in this embodiment.
[0025] Figure 7This is a force analysis diagram of the pressure plate anti-back ejection mechanism in the prior art during mold closing.
[0026] Figure 8 for Figure 7 The static analysis simulation model of the pendulum block performed in UG software;
[0027] Figure 9 This is a force analysis diagram of the upper mold pressure plate delayed release mechanism during mold closing in this embodiment;
[0028] Figure 10 for Figure 9 The static analysis simulation model of the lever swinging component performed in UG software;
[0029] Figure 11 for Figure 9 The static analysis simulation model of the limiting slider in UG software
[0030] Figure 12 This is a schematic diagram of the lever swing component structure in this embodiment.
[0031] Explanation of icon numbers:
[0032] 1. Upper mold base; 101. Upper mold flanging cutter block; 2. Upper mold pressure plate; 3. Ejector block; 301. Elastic locking component;
[0033] 4. Lower die holder; 5. Lower die pressure plate; 6. Lower die punch; 601. Lower die flanging cutter holder;
[0034] 7. Transmission block; 8. Limiting slider; 801. Limiting groove; 9. Lever swing component; 901. Rotating shaft; 902. Round head of first swing arm; 903. Round head of second swing arm; 10. Top elastic abutment component; 11. Bottom elastic abutment component. Detailed Implementation
[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] This embodiment discloses a pressing die, which includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base 1, an upper die pressing plate 2 elastically mounted on the upper die base 1 via an upper die elastic connector (not shown in the figure), and a counter block 3 mounted on the upper die pressing plate 2. The lower die assembly includes a lower die base 4, a lower die pressing plate 5 elastically mounted on the lower die base 4 via a lower die elastic connector (not shown in the figure), and a lower die punch 6 mounted on the lower die base 4. In this embodiment, both the upper die elastic connector and the lower die elastic connector can be nitrogen springs. The upper die base 1 is provided with an upper die flanging cutter block 101, and the lower die punch 6 is provided with a lower die flanging cutter holder 601 that matches the upper die flanging cutter block 101. When the die closes, the upper die pressure plate 2 presses the sheet metal against the lower die punch 6, compressing the upper die elastic connector. As the upper die base 1 continues to descend, the upper die flanging cutter block 101 of the upper die base 1 cooperates with the lower die flanging cutter holder 601 to flanging the sheet metal flanging area downwards. The upper die base 1 continues to descend until the lower die elastic connector is compressed, causing the lower die pressure plate 5 to move to the bottom, completing the stamping of the sheet metal. In the prior art, at the moment the die opens, the lower die pressure plate 5 rises rapidly under the drive of the compressed nitrogen spring, causing the upper die pressure plate 2 to be released and squeezed by the lower die pressure plate 5 after the part is formed. Under strong impact, this can easily lead to product shape distortion or even irreparable scrap.
[0037] In response, this embodiment proposes a delayed release mechanism for the upper die pressing plate of a pressing mold, which is disposed in the pressing mold and includes: a transmission block 7, a limiting slider 8, a lever swinging component 9, a top elastic abutment component 10, a bottom elastic abutment component 11, and an elastic locking component 301.
[0038] See Figure 1-6 The transmission block 7 is mounted on the lower die pressure plate 5 and can move longitudinally; the top elastic abutment 10 is mounted on the lower die pressure plate 5 and is directly opposite the top of the transmission block 7; the bottom elastic abutment 11 is mounted on the lower die base 4 and is directly opposite the bottom of the transmission block 7. In this embodiment, both the top elastic abutment 10 and the bottom elastic abutment 11 can be nitrogen springs. Furthermore, the elastic force of the bottom elastic abutment 11 is greater than that of the top elastic abutment 10; the elastic force of the lower die elastic connector is greater than that of the upper die elastic connector.
[0039] The limiting slider 8 is set on the lower die pressing plate 5 and can move laterally. The limiting slider 8 is located on one side of the top block 3 and can move to the bottom of the top block 3. The elastic locking member 301 is set at the bottom of the top block 3. The top of the limiting slider 8 is provided with a limiting groove 801 for the elastic locking member 301 to be inserted. In this embodiment, the elastic locking member 301 may specifically include a spring pin and a rectangular spring for pre-pressing the spring pin.
[0040] The lever swing member 9 is axially connected to the lower die pressing plate 5. One end of the lever swing member 9 is connected to the transmission block 7, and the other end is connected to the limiting slider 8. In this embodiment, the lever swing member 9 includes a shaft connection part, a transverse swing arm part, and a longitudinal swing arm part. The shaft connection part is provided with a rotating shaft 901 that is axially connected to the lower die pressing plate 5. The longitudinal swing arm part is provided with a first swing arm round head 902. The limiting slider 8 is provided with a first slide groove for assembling the first swing arm round head 902. The transverse swing arm part is provided with a second swing arm round head 903. The transmission block 7 is provided with a second slide groove for assembling the second swing arm round head 903.
[0041] The working process of the pressure die and delayed release mechanism in this solution is as follows:
[0042] (1) Placing the sheet metal to be stamped: The stamping die opens, leaving space between the upper die assembly and the lower die assembly, which can be used to place the sheet metal to be stamped in the space.
[0043] (2) Downward pressing plate material: see Figure 1 The pressing die begins to close, the upper die assembly moves downward, the upper die base 1 drives the upper die pressing plate 2 and the counter block 3 to move downward together until the upper die pressing plate 2 presses the sheet metal onto the lower die punch 6. At this time, the upper die base 1 continues to move downward, the upper die pressing plate 2 is held relatively still by the lower die punch 6, and the upper die elastic connector begins to compress.
[0044] (3) Start flipping the edge: see Figure 2 When the mold is about to close (about 30mm distance), the upper mold flanging blade block 101 of the upper mold base 1 holds the sheet against the lower mold flanging blade block 601 and pushes the sheet flanging area downward. At this time, it drives the lower mold pressing plate 5 to move down together until the transmission block 7 contacts the bottom elastic abutment 11.
[0045] (4) Rotation of the lever swing component: see Figure 3 As the upper mold base 1 continues to descend, when the mold is about to close (approximately 25mm), due to the greater elastic force of the bottom elastic abutment 11 than the top elastic abutment 10, the transmission block 7 is held by the bottom elastic abutment 11 and overcomes the elastic force of the top elastic abutment 10 to remain relatively stationary. This causes the shaft contact point of the lever swing member 9 to form a longitudinal displacement with the transmission block 7, thereby driving the lever swing member 9 to rotate and push the limit slider 8 to move laterally, and slide against the side of the top block 3.
[0046] (5) Pressing die closing and locking: see Figure 4The upper mold base 1 continues to descend until the transmission block 7 overcomes the elastic force of the bottom elastic abutment 11 and continues to move downward. At the moment when the pressure die is closed, the limiting slider 8 moves down with the lower mold pressure plate 5 until it separates from the side of the top block 3. At the same time, the compressed bottom elastic abutment 11 releases its elastic force and pushes the transmission block 7 to jump upward. The transmission block 7 drives the limiting slider 8 to quickly push into the bottom of the top block 3 through the lever swing member 9. At the moment the limiting slider 8 is in place, the elastic locking member 301 immediately springs into the limiting groove 801, restricting the relative lateral movement of the limiting slider 8 and the top block 3.
[0047] (6) Opening the pressing die: See Figure 5 When the upper mold base 1 begins to return and rise, the lower mold elastic connector (with greater force) releases its elastic force first, pushing the lower mold pressure plate 5 and the upper mold pressure plate 2 to move upward synchronously until the lower mold elastic connector fully releases its elastic force and the lower mold pressure plate 5 resets. At this time, the limit slider 8 and the counter block 3 remain locked and counter-aligned under the action of the elastic locking member 301, thereby delaying the release of the upper mold pressure plate 2 when the mold opens, preventing the upper mold pressure plate 2 from rapidly unloading force and causing the lower mold pressure plate 5 to return, resulting in part shape distortion or damage.
[0048] (7) Release of upper and lower pressure plates: See Figure 6 After the lower mold elastic connector fully releases its elastic force, the upper mold elastic connector begins to release its elastic force until it is fully released. The upper mold base 1 continues to move upward (about 5mm), causing the upper mold pressure plate 2's opposing block 3 to leave the lower mold pressure plate 5's limiting slider 8. The top elastic abutment 10 releases its elastic force to push the transmission block 7 downward. The transmission block 7 drives the limiting slider 8 to move laterally and reset through the lever swing member 9.
[0049] To verify the advantages of the delayed release mechanism in this embodiment compared to existing pressure plate anti-backflow mechanisms (such as the molding pressure plate anti-backflow structure disclosed in patent CN216989532U), see [link to relevant documentation]. Figure 7-8 Through force analysis, the direct force-bearing body of the traditional mechanism is the pendulum block ( Figure 10 (12) The swing block may be deformed near the pivot hole, which makes the hole or pivot very easy to wear and thus has a short service life. In some cases, the lever may wear out and become unable to rotate, causing more serious damage to the mold during production.
[0050] Unlike traditional institutions, such as Figure 9-11 As shown, the main force-bearing components of the delayed release mechanism in this scheme are the limiting slider and the counter block. The contact area between these two is large, which can withstand the greater force generated when the pressing die is working. When subjected to a force of 1800442N (about 18 tons), the strength of the lever swinging component 9 and the limiting slider 8 is still very good, which can better extend the service life of the mechanism and ensure production safety.
[0051] As can be seen, this solution, through the organic combination of the transmission block 7, the limiting slider 8, the lever swing component 9, and the top block 3, significantly improves the strength that the delayed release mechanism can withstand, overcoming the problem of limited application scenarios caused by the force problem of traditional mechanisms. The delayed release mechanism of this solution can be applied to pressing molds with a larger force range.
[0052] As a preferred option, refer to Figure 12 In this embodiment, the distance L1 from the pivot 901 of the lever swing member 9 to the round head 902 of the first swing arm is greater than the distance L2 from the pivot 901 to the round head 903 of the second swing arm. The ratio of L1 to L2 is preferably between 1.5 and 2. In addition, the included angle between the lateral swing arm portion and the longitudinal swing arm portion of the lever swing member 9 (i.e., the included angle at the intersection of L1 and L2) is 90° to 120°. By adopting such a design, the lever swing member 9 is more balanced in terms of force, has better strength, and the pivot hole is not deformed. Moreover, when the limiting slider 8 moves to the bottom of the top block 3, the lever swing member 9 rotates until the longitudinal swing arm portion is in the longitudinal direction, so that the delayed release mechanism mainly occupies the vertical space in the pressure die, and occupies less space in the lateral direction. This can reduce the external dimensions of the die and thus save costs.
[0053] By adopting the special structure proposed in this technical solution, the spatial limitations of traditional mold design can be overcome, achieving a more compact mold layout while maintaining the same effective working surface size. This structure, through the rational coordination of moving parts, ensures the reliability of the movement of each functional module within a limited space and significantly improves material utilization. Practice has proven that this method can not only save approximately 15-25% of mold material consumption but also increase production cycle time due to the shortened step distance, reducing the average single stamping cycle by 0.5-1.2 seconds, thus achieving significant improvements in equipment operating efficiency and energy consumption. Simultaneously, this structural design maintains good stability and service life, fully meeting the requirements of mass production of automotive parts.
[0054] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A delayed release mechanism for the upper die pressure plate of a pressure die, the delayed release mechanism being disposed in the pressure die, the pressure die including an upper die assembly and a lower die assembly, the upper die assembly including an upper die base, an upper die pressure plate elastically mounted on the upper die base via an upper die elastic connector, and a counter block mounted on the upper die pressure plate; the lower die assembly including a lower die base, a lower die pressure plate elastically mounted on the lower die base via a lower die elastic connector, and a lower die punch mounted on the lower die base; Its features are, The delayed release mechanism includes: A transmission block is disposed on the lower die pressure plate and can move longitudinally. The lower die pressure plate is equipped with a top elastic abutment member facing the top of the transmission block, and the lower die base is equipped with a bottom elastic abutment member facing the bottom of the transmission block. The top elastic abutment member and the bottom elastic abutment member drive the transmission block to move longitudinally through elastic abutment. The elastic force of the bottom elastic abutment member is greater than the elastic force of the top elastic abutment member, and the elastic force of the lower die elastic connecting member is greater than the elastic force of the upper die elastic connecting member. A limiting slider is provided on the lower die pressing plate and can move laterally. The limiting slider is located on one side of the top block and can move to the bottom of the top block. The bottom of the top block is provided with an elastic locking member, and the top of the limiting slider is provided with a limiting groove for the elastic locking member to be inserted. The lever swing member is axially connected to the lower die pressing plate. One end of the lever swing member is connected to the transmission block, and the other end of the lever swing member is connected to the limiting slider.
2. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 1, characterized in that, The lever swing component includes a shaft connection part, a transverse swing arm part, and a longitudinal swing arm part. The shaft connection part is provided with a rotating shaft that is shaft-connected to the lower die pressing plate. The longitudinal swing arm part is provided with a first swing arm round head. The limiting slider is provided with a first slide groove for assembling the first swing arm round head. The transverse swing arm part is provided with a second swing arm round head. The transmission block is provided with a second slide groove for assembling the second swing arm round head.
3. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 2, characterized in that, The ratio of the distance L1 from the pivot of the lever swinging component to the round head of the first swing arm to the distance L2 from the pivot to the round head of the second swing arm is 1.5 to 2.
4. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 2, characterized in that, The included angle between the transverse swing arm and the longitudinal swing arm of the lever swing member is 90° to 120°.
5. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 2, characterized in that, When the limiting slider moves to the bottom of the top block, the lever swing member rotates until the longitudinal swing arm is in the longitudinal direction.
6. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 1, characterized in that, The upper mold base is provided with an upper mold flanging cutter block, and the lower mold punch is provided with a lower mold flanging cutter block that matches the upper mold flanging cutter block.
7. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 1, characterized in that, The elastic locking element includes: a spring-loaded pin and a rectangular spring for pre-compressing the spring-loaded pin.
8. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 1, characterized in that, The upper mold elastic connector, lower mold elastic connector, top elastic abutment, and bottom elastic abutment are all nitrogen springs.
9. The delayed release mechanism for the upper die pressing plate of the pressing mold according to claim 1, characterized in that, When the sheet metal is pressed down by the upper mold assembly and moves the lower mold pressing plate down together, the transmission block contacts the bottom elastic abutment and overcomes the elastic force of the top elastic abutment. The shaft contact point of the lever swing member forms a longitudinal displacement with the transmission block, driving the lever swing member to rotate and push the limit slider to move laterally and press against the side of the top block. When the pressing mold is closed, the limiting slider moves down with the lower mold pressing plate until it is separated from the side of the top block. The compressed bottom elastic abutment releases its elastic force and pushes the transmission block up. The transmission block drives the limiting slider to push into the bottom of the top block through the lever swinging component. The elastic locking component springs into the limiting groove to restrict the lateral movement of the limiting slider relative to the top block. When the pressure die opens, the lower die elastic connector releases its elastic force first, pushing the lower die pressure plate and the upper die pressure plate to move upward synchronously until the lower die elastic connector fully releases its elastic force. Then, the limiting slider and the counter block remain locked and counter-aligned under the action of the elastic locking component. The upper die base continues to move upward until the upper die elastic connector fully releases its elastic force. Subsequently, the counter block of the upper die pressure plate leaves the limiting slider of the lower die base. The top elastic abutment component releases its elastic force to push the transmission block downward. The transmission block drives the limiting slider to move laterally and reset through the lever swing component.
10. A pressing die, comprising an upper die assembly and a lower die assembly, characterized in that, Includes the delayed release mechanism as described in any one of claims 1-9.