Forming and flanging integrated stamping die

Abstract

The invention belongs to the technical field of stamping devices, and provides a forming and flanging integrated stamping die which comprises a lower die assembly, an upper die assembly and a lower die assembly. The upper die assembly is movably matched with the lower die assembly and comprises a driving piece and a pressing block which is movably arranged; the primary forming block is arranged on the upper die assembly and moves synchronously with the upper die assembly; the secondary forming block is movably arranged on the lower die assembly and located on one side of the supporting piece. Compared with the prior art, a primary forming block and a secondary forming block are integrated in the same set of die, and a time sequence matching mechanism that the upper die assembly completes first-time stamping in the descending stage and drives the secondary forming block to complete second-time stamping in the return stroke stage is ingeniously utilized; the two procedures of main body forming and edge flanging are synchronously completed in a single stamping cycle, and the size precision, the contour consistency and the overall production efficiency of precision stamping parts such as window frame bright decoration strips are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of stamping equipment technology, and specifically relates to an integrated stamping die for forming and flanging. Background Technology

[0002] In the manufacturing of automotive body panels and interior / exterior trim components, window frame bright trim strips, as a key component combining decorative and functional aspects, are typically manufactured from flat metal sheets through multiple stamping processes. Their typical structure often includes a main formed portion and an edge-flanging structure to meet assembly sealing, strength, and aesthetic requirements. To achieve such complex geometries, traditional processes generally employ a step-by-step, multi-station stamping method: first, the flat sheet is stamped once at the first station to form the main outline; then, the semi-finished product is transferred to the second station, repositioned, and subjected to secondary stamping operations such as flanging.

[0003] However, the aforementioned existing technologies have significant drawbacks. On the one hand, since the two stamping processes need to be completed on different molds or at different workstations, the semi-finished products must be temporarily stored, handled, and reloaded in between. This not only significantly increases the logistics process but also occupies a large amount of valuable workshop production space, reducing the overall production line's compactness and automation efficiency. On the other hand, the formed semi-finished products need to be repositioned before the second stamping. This process is highly susceptible to cumulative tolerances due to positioning datum deviations, fixture errors, or human error, leading to a decrease in the dimensional accuracy of the final product. This is especially true for parts like window frame trim strips, which have extremely high requirements for consistent appearance. Even slight positional deviations can cause assembly interference or visual defects, seriously affecting product quality and yield.

[0004] Furthermore, traditional step-by-step stamping processes struggle to effectively coordinate the timing and spatial avoidance relationships between two stamping actions, often requiring complex robotic arms or conveyor mechanisms, further increasing equipment costs and maintenance complexity. Therefore, there is an urgent need for an integrated mold structure that can combine body forming and edge flanging within a single stamping cycle, eliminating intermediate transfer links, reducing repetitive positioning errors, and improving stamping efficiency and product consistency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an integrated forming and flanging stamping die in view of the current state of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A stamping die for forming and flanging is provided for stamping sheet metal, characterized in that the stamping die comprises:

[0007] The lower mold assembly has a support member on it, which is used to provide support for the sheet metal;

[0008] The upper mold assembly is movably coupled with the lower mold assembly and includes a driving component and a movable pressing block, the pressing block being used to fix the sheet metal onto the support component;

[0009] A one-time forming block is disposed on the upper mold assembly and moves synchronously with the upper mold assembly. The one-time forming block is used to perform a stamping operation on the sheet metal along a first direction.

[0010] A secondary forming block is movably disposed on the lower die assembly and located on one side of the support member. The secondary forming block is movably engaged with the drive member and is used to perform a stamping operation on the sheet metal in a second direction.

[0011] The action of the secondary forming block includes a sequential idle stroke and a stamping stroke; wherein...

[0012] When the upper mold assembly and the lower mold assembly approach each other, the primary forming block performs the first stamping operation on the plate that is clamped and fixed by the pressing block and the support member. At the same time, the driving member drives the secondary forming block to perform the idle stroke to avoid the stamping action of the primary forming block.

[0013] When the upper die assembly and the lower die assembly move away from each other, the driving member drives the secondary forming block to perform the stamping stroke and perform a second stamping operation on the sheet metal. At the same time, the upper die assembly drives the primary forming block away from the support member to avoid the stamping action of the secondary forming block.

[0014] In the above-mentioned integrated forming and flanging stamping die, the first direction is perpendicular to the second direction.

[0015] In the above-mentioned integrated forming and flanging stamping die, the secondary forming block is provided with a first inclined surface and a second inclined surface arranged at an angle at one end away from the support member, and the driving member is provided with a third inclined surface and a fourth inclined surface arranged at an angle.

[0016] When the upper mold assembly and the lower mold assembly approach each other, the fourth inclined surface and the first inclined surface move against each other, pushing the secondary forming block to move towards the support member, so that the secondary forming block performs the empty stroke;

[0017] When the upper die assembly and the lower die assembly move away from each other, the third inclined surface and the second inclined surface move together, pushing the secondary forming block toward the support member, so that the secondary forming block performs the stamping stroke.

[0018] In the aforementioned integrated forming and flanging stamping die, along the direction in which the upper die assembly and the lower die assembly approach each other, the angle between the first inclined surface and / or the fourth inclined surface and the direction in which the upper die assembly and the lower die assembly approach each other is smaller than the angle between the second inclined surface and / or the third inclined surface and the direction in which the upper die assembly and the lower die assembly approach each other, so that the displacement of the secondary forming block in the idle stroke is smaller than the displacement in the stamping stroke.

[0019] In the above-mentioned integrated forming and flanging stamping die, the extension length of the driving member on the upper die assembly is greater than the pressing depth length of the primary forming block on the upper die assembly, so that when the upper die assembly and the lower die assembly are close together, after the fourth inclined surface has passed the first inclined surface, the primary forming block begins to perform a stamping operation on the sheet metal.

[0020] In the above-mentioned integrated forming and flanging stamping die, a driven block is provided on the secondary forming block, the lower die assembly includes a pad block, the pad block is movably abutted against the secondary forming block to provide support for the secondary forming block, and a first elastic element is provided on the pad block, one end of the first elastic element is pressed against the driven block.

[0021] When the first inclined surface and the fourth inclined surface abut together, or when the second inclined surface and the third inclined surface abut together, the driven block and the secondary forming block move synchronously and compress the first elastic element.

[0022] When the fourth inclined plane passes over the first inclined plane, or the second inclined plane passes over the third inclined plane, the first elastic element returns to its extended state and pushes the secondary molding block to reset.

[0023] In the above-mentioned integrated forming and flanging stamping die, the upper die assembly is provided with a reset block, the reset block is provided with a fifth inclined surface, and the secondary forming block is provided with an insertion hole for the reset block to be inserted. The insertion hole has an opening facing the reset block, and the opening is provided with a sixth inclined surface. The sixth inclined surface and the fifth inclined surface move against each other to push the secondary forming block to reset before the primary forming block stamps the sheet metal.

[0024] In the aforementioned integrated forming and flanging stamping die, at least two pushing blocks are spaced apart on the upper die assembly, and the support member includes:

[0025] Base;

[0026] A support base is provided on the base, and a limiting member is provided on the support base. The limiting member movably abuts against one end of the plate placed on the support base.

[0027] The positioning blocks are arranged at intervals along the extension direction of the plate and are movably mounted on the base. Each positioning block includes two limiting parts arranged opposite to each other. One of the limiting parts is located at the end of the support seat facing the secondary forming block, and the other is located at the end of the support seat away from the secondary forming block. The limiting part and the two limiting parts together provide limiting for the plate.

[0028] Guide members, which are disposed on the base and correspond one-to-one with the positioning blocks, are used to guide the movement of the positioning blocks;

[0029] The second elastic element is disposed inside the base and one end extends into the positioning block;

[0030] When the upper mold assembly and the lower mold assembly approach each other and the pushing block presses against the plate, the pushing block abuts against the positioning block, presses the positioning block into the base, and compresses the second elastic member;

[0031] When the upper mold assembly and the lower mold assembly separate from each other, the second elastic element extends and pushes the positioning block to reset.

[0032] In the above-mentioned integrated forming and flanging stamping die, the secondary forming block is provided with a relief groove, and the positioning block is movably inserted into the relief groove.

[0033] When the secondary forming block is in the idle stroke or the stamping stroke, one end of the positioning block is inserted into the clearance groove to provide clearance space for the movement of the secondary forming block.

[0034] In the aforementioned integrated forming and flanging stamping die, the upper die assembly includes:

[0035] A connecting seat, wherein the driving component is fixedly connected to the connecting seat, and a third elastic element is provided on the connecting seat;

[0036] The mounting base is disposed on the connecting base, the one-piece molded block is fixedly connected to the mounting base, and the pressing block is movably disposed on the mounting base and abuts against one end of the third elastic member.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] (1) By integrating the primary forming block and the secondary forming block into the same mold, and by cleverly utilizing the timing mechanism of the upper mold component completing the first stamping during the downward phase and driving the secondary forming block to complete the second stamping during the return phase, the two processes of main body forming and edge flanging are completed simultaneously in a single stamping cycle. This design eliminates the need for intermediate transfer, temporary storage or secondary clamping, and completely solves the problems of frequent material handling and large production space occupation in the traditional station stamping process. At the same time, it avoids the cumulative error introduced by repeated positioning and significantly improves the dimensional accuracy, contour consistency and overall production efficiency of precision stamping parts such as window frame bright trim.

[0039] (2) By defining the first direction (e.g., vertically downward) and the second direction (e.g., horizontally laterally) as perpendicular to each other, the actions of forming the main outline in the first stamping and achieving edge flanging in the second stamping are orthogonally separated in space. This ensures that the two forming actions do not interfere with each other and meets the forming requirements of the typical structure of window frame bright trim. This layout further enhances the feasibility of "integrated" stamping, ensuring high-quality completion of complex geometric features in a single station and avoiding forming defects or mold interference caused by directional coupling.

[0040] (3) A mechanical transmission method using inclined plane-integrated inclined planes is adopted. The drive component on the upper die assembly triggers the idle stroke and stamping stroke of the secondary forming block separately through different inclined planes, eliminating the need for additional hydraulic or pneumatic actuators, making the structure simpler and more reliable. This design ensures that during the downward phase of the upper die assembly, only the secondary forming block is pre-displaced (idle stroke) to avoid interference with the primary forming block; while during the return phase of the upper die assembly, effective stamping force is applied to complete the flanging (stamping stroke). This allows for precise timing control, ensuring spatial avoidance and functional independence of the two stamping actions, thereby supporting integrated continuous forming processes. Attached Figure Description

[0041] Figure 1 This is a perspective view of an integrated forming and flanging stamping die of the present invention.

[0042] Figure 2 yes Figure 1 Floor plan.

[0043] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0044] Figure 4 yes Figure 3 A magnified view of a section at point C.

[0045] Figure 5 yes Figure 2 Sectional view along the BB direction.

[0046] Figure 6 yes Figure 5 A magnified view of a section at point D.

[0047] Figure 7 yes Figure 1 Hides the view after the structure of the upper module component.

[0048] Figure 8 yes Figure 7 A magnified view of a section at point E in the middle.

[0049] Figure 9 A 3D view of the upper mold component.

[0050] Figure 10 Plan view of the upper mold assembly.

[0051] Figure 11 yes Figure 10 A cross-sectional view of FF.

[0052] Figure 12 A three-dimensional view of the lower mold assembly after concealing part of the structure.

[0053] In the figure, 100 is the lower mold assembly; 110 is the support component; 111 is the base; 112 is the support seat; 113 is the limiting component; 114 is the positioning block; 114a is the limiting part; 115 is the guide component; 116 is the second elastic component; 120 is the pad block; 130 is the first elastic component; 200 is the upper mold assembly; 210 is the driving component; 211 is the third inclined surface; 212 is the fourth inclined surface; 220 is the pushing block; 230 is the resetting block; 231 is the fifth inclined surface; 240 is the pressing block; 250 is the connecting seat; 260 is the third elastic component; 270 is the mounting seat; 300 is the primary forming block; 400 is the secondary forming block; 410 is the first inclined surface; 420 is the second inclined surface; 430 is the driven block; 440 is the insertion hole; 450 is the sixth inclined surface; and 460 is the clearance groove. Detailed Implementation

[0054] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0056] like Figures 1 to 12 As shown, the present invention provides an integrated forming and flanging stamping die for stamping sheet metal. The stamping die includes: a lower die assembly 100, an upper die assembly 200, a primary forming block 300, and a secondary forming block 400.

[0057] Specifically, the lower die assembly 100 is provided with a support member 110 for supporting the sheet metal. The upper die assembly 200 is movably fitted with the lower die assembly 100, and the relative movement between the two can be achieved by stamping equipment such as a stamping press, or by direct drive of a hydraulic cylinder. Normally, the lower die assembly 100 remains fixed, while the upper die assembly 200 moves closer to or further away from the lower die assembly 100.

[0058] The upper die assembly 200 includes a drive member 210 and a movable pressing block 240. The pressing block 240 is used to press and fix the sheet metal onto the support member 110, thereby preventing the sheet metal from shifting during the stamping process and ensuring the forming accuracy of the workpiece.

[0059] A primary forming block 300 is disposed on the upper die assembly 200 and moves synchronously with the upper die assembly 200. In one embodiment, the primary forming block 300 is fixed to the upper die assembly 200 by means of welding, threaded connection, or snap-fit. This primary forming block 300 serves as a functional component for performing the first stamping operation. When the upper die assembly 200 moves towards the lower die assembly 100, it moves along a first direction (i.e., ... Figure 1 The main outline of the sheet metal is formed by stamping from top to bottom.

[0060] The secondary molding block 400 is movably disposed on the lower mold assembly 100 and located on one side of the support member 110. The secondary molding block 400 is movably engaged with the driving member 210, and is driven by the driving member 210 to move along the second direction (i.e., Figure 3 Move from left to right to complete the second stamping operation on the edge of the sheet metal.

[0061] The operation of the secondary forming block 400 includes a sequential idle stroke and a stamping stroke. The specific working process is as follows:

[0062] When the upper mold assembly 200 and the lower mold assembly 100 approach each other, the pressing block 240 moves down synchronously with the upper mold assembly 200, clamping the sheet metal between the pressing block 240 and the support member 110. As the upper mold assembly 200 continues to move down, the primary forming block 300 performs the first stamping operation on the clamped sheet metal; at the same time, the driving member 210 drives the secondary forming block 400 to perform a no-stroke operation—that is, it only generates displacement and does not participate in forming, so as to avoid interference with the primary forming block 300.

[0063] When the upper die assembly 200 and the lower die assembly 100 begin to move away from each other, the drive component 210 drives the secondary forming block 400 to perform a stamping stroke and perform a second stamping on the sheet metal in the second direction. At this time, the primary forming block 300 has moved upward with the upper die assembly 200 and away from the support component 110, providing sufficient clearance for the stamping action of the secondary forming block 400.

[0064] This solution integrates the primary forming block 300 and the secondary forming block 400 into the same mold, and cleverly utilizes the timing mechanism of the upper mold assembly 200 completing the first stamping during the downward phase and driving the secondary forming block 400 to complete the second stamping during the return phase, thus realizing the simultaneous completion of the main body forming and edge flanging processes within a single stamping cycle.

[0065] This design eliminates the need for intermediate transfers, temporary storage, or secondary clamping, completely solving the problems of frequent material handling and large production space occupation in traditional station stamping processes. At the same time, it avoids the cumulative errors introduced by repeated positioning, significantly improving the dimensional accuracy, contour consistency, and overall production efficiency of precision stamped parts such as window frame trim strips.

[0066] In a preferred embodiment, the first direction is perpendicular to the second direction.

[0067] By defining the first direction (e.g., vertically downward) and the second direction (e.g., horizontally laterally) as perpendicular to each other, the actions of forming the main outline in the first stamping and achieving edge flanging in the second stamping are orthogonally separated in space. This ensures that the two forming actions do not interfere with each other and meets the forming requirements of typical window frame trim structures. This layout further enhances the feasibility of "integrated" stamping, ensuring high-quality completion of complex geometric features in a single station and avoiding forming defects or mold interference caused by directional coupling.

[0068] In order to achieve the pushing effect of the driving component 210 on the secondary forming block 400, in the process of the driving component 210 moving synchronously with the upper mold assembly 200, in this solution, a first inclined surface 410 and a second inclined surface 420 arranged at an angle are provided at the end of the secondary forming block 400 away from the support component 110, while a third inclined surface 211 and a fourth inclined surface 212 arranged at an angle are provided on the driving component 210.

[0069] When the upper die assembly 200 and the lower die assembly 100 approach each other, the fourth inclined surface 212 contacts and abuts the first inclined surface 410, thereby pushing the secondary forming block 400 to move towards the support member 110, so that the secondary forming block 400 performs an idle stroke, that is, providing clearance space for the stamping operation of the primary forming block 300.

[0070] When the upper die assembly 200 and the lower die assembly 100 move away from each other, the third inclined surface 211 and the second inclined surface 420 come into contact and press tightly together, which also pushes the secondary forming block 400 to move towards the support member 110. However, this movement is to perform the stamping stroke and complete the flanging operation of the sheet metal.

[0071] The mechanical transmission method of inclined plane-in-inclined plane is adopted. The drive component 210 on the upper mold assembly 200 triggers the idle stroke and stamping stroke of the secondary forming block 400 through different inclined planes. No additional hydraulic or pneumatic actuators are required, making the structure simpler and more reliable.

[0072] This design ensures that during the downward stroke of the upper die assembly 200, only the secondary forming block 400 undergoes pre-displacement (idle stroke) to avoid interference with the primary forming block 300; while during the return stroke of the upper die assembly 200, effective stamping force is applied to complete the stamping stroke. This allows for precise timing control, ensuring spatial avoidance and functional independence between the two stamping actions, thereby supporting integrated continuous forming processes.

[0073] To avoid interference between the secondary forming block 400 and the primary forming block 300 when the drive component 210 drives the secondary forming block 400 to perform an idle stroke, in one embodiment, the angle between the first inclined surface 410 and / or the fourth inclined surface 212 and the approach direction along the direction in which the upper die assembly 200 and the lower die assembly 100 approach each other is smaller than the angle between the second inclined surface 420 and / or the third inclined surface 211 and the approach direction. This results in the secondary forming block 400's displacement during the idle stroke phase being less than its displacement during the stamping stroke phase.

[0074] By designing the angle of the inclined plane corresponding to the idle stroke to be smaller than the angle of the inclined plane corresponding to the stamping stroke, the secondary forming block 400 can only produce a small displacement during the idle stroke stage (to avoid the primary forming area), while obtaining a larger displacement during the stamping stroke stage to ensure that the flanging is fully in place.

[0075] This differentiated displacement control effectively prevents the secondary forming block 400 from excessively intruding into the forming area during the primary stamping process, thus preventing interference. It also ensures that the flanging action has sufficient stroke depth, taking into account both the safety of mold operation and forming quality, and improving the adaptability of the mold and the consistency of the product.

[0076] In another embodiment, to further ensure the reliability of the timing of the action, the extension length of the drive member 210 on the upper mold assembly 200 is set to be greater than the pressing depth length of the primary molding block 300 on the upper mold assembly 200.

[0077] Therefore, as the upper mold assembly 200 and the lower mold assembly 100 approach each other, the fourth inclined surface 212 of the drive component 210 will first contact the primary forming block 300 and push the secondary forming block 400 to complete the empty stroke; after the fourth inclined surface 212 passes the first inclined surface 410, the primary forming block 300 will start to contact the sheet metal and perform the first stamping operation.

[0078] This structural design ensures that in the initial stage of the upper mold's descent, the drive component 210 has already completed the avoidance drive of the secondary forming block 400, and only then does the primary forming block 300 intervene in the main forming process.

[0079] This "avoid first, form later" time priority mechanism effectively avoids structural interference or sheet metal stress disorder that may be caused by the overlap of two forming actions in time, ensuring the stability of one stamping and laying the foundation for subsequent precise flanging, thereby significantly reducing the scrap rate caused by action conflict.

[0080] To ensure that the secondary forming block 400 can automatically reset after completing the idle stroke and the stamping stroke, this design includes a driven block 430 on the secondary forming block 400. The lower die assembly 100 includes a pad 120, which movably abuts against the secondary forming block 400 to provide support. The pad 120 is provided with a first elastic element 130, one end of which abuts against the driven block 430.

[0081] When the first inclined surface 410 abuts against the fourth inclined surface 212, or the second inclined surface 420 abuts against the third inclined surface 211, the driven block 430 moves synchronously with the secondary forming block 400 and compresses the first elastic member 130; when the fourth inclined surface 212 passes over the first inclined surface 410, or the second inclined surface 420 passes over the third inclined surface 211, the inclined surfaces disengage, the first elastic member 130 returns to its extended state, and pushes the driven block 430 and the secondary forming block 400 back to their initial positions, thus achieving automatic reset.

[0082] The first elastic element 130 is preferably a spring, and the driven block 430 is preferably L-shaped to facilitate cooperation with the elastic element and transmit the restoring force.

[0083] By setting up a reset buffer mechanism consisting of the driven block 430 and the first elastic element 130, the secondary forming block 400 can be automatically pushed back to the starting position after the driving inclined plane disengages, ensuring that it is in an accurate initial state before each stamping cycle begins.

[0084] This self-resetting mechanism effectively eliminates position drift caused by mechanical backlash, motion inertia, or residual displacement, and avoids affecting the flanging accuracy due to the initial position deviation of the secondary forming block 400. This reduces processing errors caused by inaccurate positioning and significantly improves the repeatability and forming consistency of the product.

[0085] Considering that the first elastic element 130 may lose its reset function due to fatigue failure after long-term use, this solution adds a redundant structure for driving the secondary forming block 400 to reset: a reset block 230 is provided on the upper die assembly 200, and the reset block 230 has a fifth inclined surface 231; correspondingly, the secondary forming block 400 has an insertion hole 440 for the reset block 230 to be inserted, the insertion hole 440 has an opening facing the reset block 230, and a sixth inclined surface 450 is provided at the opening. The fifth inclined surface 231 and the sixth inclined surface 450 move against each other, and can force the secondary forming block 400 to reset to the initial position by the downward movement of the upper die before the primary forming block 300 stamps the sheet.

[0086] The active reset structure, consisting of the reset block 230 and the inclined surface of the insertion hole 440, applies mechanical thrust to the secondary forming block 400 at the initial stage of the downward movement of the upper mold assembly 200, ensuring its accurate return to position.

[0087] Compared to the passive reset method that relies entirely on the first elastic element 130, this mechanical limit reset mechanism has higher reliability and repeatability, and is especially suitable for high-speed stamping operations. It can effectively avoid flanging failure, forming deviation, or even die collision damage caused by aging of the first elastic element 130 or incomplete reset, thereby further improving the stability of the stamping process and product yield.

[0088] It is worth mentioning that at least two push blocks 220 are spaced apart on the upper mold assembly 200, and the support member 110 includes:

[0089] Base 111;

[0090] A support base 112 is disposed on the base 111, and a limiting member 113 is provided on the support base 112. The limiting member 113 movably abuts against one end of the plate placed on the support base 112.

[0091] Positioning blocks 114, which correspond one-to-one with the pushing blocks 220, are spaced apart along the extension direction of the plate and are movably mounted on the base 111. Each positioning block 114 includes two opposing limiting parts 114a, one of which is located at the end of the support base 112 facing the secondary forming block 400, and the other is located at the end of the support base 112 away from the secondary forming block 400. The limiting member 113 and the two limiting parts 114a together provide limiting for the plate.

[0092] Guide member 115 is disposed on the base 111 and corresponds one-to-one with the positioning block 114, and is used to guide the movement of the positioning block 114;

[0093] The second elastic member 116 is disposed in the base 111 and one end extends into the positioning block 114;

[0094] When the upper mold assembly 200 and the lower mold assembly 100 approach each other and the pushing block 220 presses against the plate, the pushing block 220 abuts against the positioning block 114, presses the positioning block 114 into the base 111, and compresses the second elastic member 116.

[0095] When the upper mold assembly 200 and the lower mold assembly 100 separate from each other, the second elastic member 116 extends and pushes the positioning block 114 to reset.

[0096] The second elastic element 116 is preferably in the form of a spring, and the guide element 115 is preferably a columnar structure. The positioning block 114 is provided with a guide groove that matches the shape of the columnar guide element 115 to ensure smooth cooperation between the guide element 115 and the guide groove.

[0097] By cooperating with the positioning block 114 with double limiting part 114a and the limiting member 113, the plate is circumferentially limited at multiple points before the upper mold is pressed down. The positioning block 114 can sink with the second elastic member 116, so that after the pressing member 240 presses the plate, the positioning block 114 can be stored in the base 111 to avoid rigid interference.

[0098] This structure achieves precise positioning of the sheet metal in all directions (including the ends and sides) in a single clamping process, completely replacing the repositioning process required by traditional secondary stamping, fundamentally eliminating repeated positioning errors, and significantly improving the consistency of the window frame bright trim outline and assembly matching.

[0099] Furthermore, the secondary molding block 400 is provided with a relief groove 460, and one end of the positioning block 114 is movably inserted into the relief groove 460.

[0100] When the secondary forming block 400 performs an idle stroke or a stamping stroke, the positioning block 114 is partially embedded in the relief groove 460, providing the necessary clearance space for the movement of the secondary forming block 400.

[0101] By opening a clearance groove 460 on the secondary molding block 400, the positioning block 114 can be accommodated in the groove during the movement of the secondary molding block 400, effectively avoiding motion interference between the two.

[0102] This design ensures that the secondary forming block 400 can slide freely during both the idle and stamping strokes without being obstructed by the positioning structure, thus guaranteeing a smooth completion of the flanging action. At the same time, the positioning block 114 can still continuously exert a limiting effect on the sheet metal, balancing positioning accuracy and action coordination, and significantly improving the reliability and stability of the integrated stamping process.

[0103] Upper mold assembly 200 includes:

[0104] A connecting base 250 is provided, and a driving member 210 is fixedly connected to the connecting base 250. A third elastic member 260 is provided on the connecting base 250.

[0105] Mounting base 270 is mounted on connecting base 250. One-piece molded block 300 is fixedly connected to mounting base 270. Pressing block 240 is movably mounted on mounting base 270 and abuts against one end of third elastic member 260.

[0106] The third elastic element 260 can be a spring or a nitrogen spring. The pressing block 240 and the mounting base 270 are preferably movably connected via a snap-fit ​​mechanism. In this design, by employing a separate structure for the connecting base 250 and the mounting base 270, and utilizing the third elastic element 260 to give the pressing block 240 floating clamping capability, the pressing block 240 can clamp the workpiece before the forming block 300 contacts the sheet metal. This design effectively prevents the sheet metal from shifting or wrinkling during the stamping process.

[0107] This flexible clamping mechanism significantly improves the stability of sheet metal during composite stamping, and is especially suitable for forming bright trim strips for thin window frames. It can effectively suppress defects such as shape deviation and uneven flanging caused by insufficient clamping force or improper clamping timing, further ensuring the appearance quality and dimensional accuracy of the product.

[0108] The specific stamping process of this solution is as follows:

[0109] Before the stamping begins, the flat sheet is placed on the support base 112 of the lower die assembly 100 and is initially limited by the limiting member 113 and the positioning blocks 114 on both sides.

[0110] When the upper mold assembly 200 moves downward, the pressing block 240 first presses the plate onto the support base 112, and at the same time pushes the corresponding positioning block 114 to sink and compress the second elastic element 116, thereby making way for the secondary forming block; at the same time, the fourth inclined surface 212 of the driving element 210 contacts the first inclined surface 410 of the secondary forming block 400, causing the secondary forming block 400 to make a slight displacement (i.e., idle stroke) in the direction of the support element 110, which is only used to avoid the primary forming area and does not participate in the forming.

[0111] Subsequently, the one-piece molding block 300 applies a vertical downward punching force to the firmly clamped sheet material, completing the first punching of the main outline of the window frame bright trim strip.

[0112] When the upper die assembly 200 begins its return stroke, the primary forming block 300 quickly detaches from the sheet metal. At this time, the third inclined surface 211 of the drive component 210 cooperates with the second inclined surface 420 of the secondary forming block 400, and pushes the secondary forming block 400 to perform a larger displacement stamping stroke in the horizontal direction (perpendicular to the first stamping direction) as the upper die assembly 200 continues to rise, thus performing a second stamping operation on the edge of the sheet metal.

[0113] The upper die assembly 200 drives the drive component 210 to move, causing the third inclined surface 211 to pass over the second inclined surface 420 of the secondary forming block 400. After stamping, the first elastic component 130 pushes the secondary forming block 400 to reset, and the second elastic component 116 pushes the positioning block 114 back to its initial position, allowing the finished product to be automatically demolded. The entire process efficiently completes the main body forming and flanging processes within a single stamping cycle, eliminating the need for intermediate transfer or secondary positioning, significantly improving processing accuracy and production efficiency.

[0114] In summary, the integrated forming and flanging stamping die provided by this invention, through ingenious structural design and precise action timing control, integrates the main body forming and edge flanging required for window frame bright trim strips into the same die and completes the process in a single stamping cycle.

[0115] The upper die assembly 200 is used to achieve precise positioning of the sheet metal and the first stamping during the downward phase. During the return phase, the secondary forming block 400 is driven to complete the lateral flanging. Through the inclined plane transmission mechanism, the elastic reset assembly and the relief groove 460 structure, it is ensured that the two stamping actions do not interfere with each other in space and time and are connected in an orderly manner.

[0116] This solution completely eliminates the semi-finished product transfer, temporary storage, and repeated clamping steps necessary in traditional workstation processes. It not only saves workshop space and improves automated production efficiency, but also fundamentally eliminates the cumulative errors caused by multiple positioning. It significantly improves the dimensional accuracy, contour consistency, and appearance quality of window frame bright trim strips, making it suitable for high-precision, high-efficiency mass production of automotive precision stamping parts.

[0117] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0118] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0119] 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 stamping die for forming and flanging, used for stamping sheet metal, characterized in that, The stamping die includes: The lower mold assembly has a support member on it, which is used to provide support for the sheet metal; The upper mold assembly is movably coupled with the lower mold assembly and includes a driving component and a movable pressing block, the pressing block being used to fix the sheet metal onto the support component; A one-time forming block is disposed on the upper mold assembly and moves synchronously with the upper mold assembly. The one-time forming block is used to perform a stamping operation on the sheet metal along a first direction. A secondary forming block is movably disposed on the lower die assembly and located on one side of the support member. The secondary forming block is movably engaged with the drive member and is used to perform a stamping operation on the sheet metal in a second direction. The action of the secondary forming block includes a sequential idle stroke and a stamping stroke; wherein... When the upper mold assembly and the lower mold assembly approach each other, the primary forming block performs the first stamping operation on the plate that is clamped and fixed by the pressing block and the support member. At the same time, the driving member drives the secondary forming block to perform the idle stroke to avoid the stamping action of the primary forming block. When the upper die assembly and the lower die assembly move away from each other, the driving member drives the secondary forming block to perform the stamping stroke and perform a second stamping operation on the sheet metal. At the same time, the upper die assembly drives the primary forming block away from the support member to avoid the stamping action of the secondary forming block.

2. The integrated forming and flanging stamping die as described in claim 1, characterized in that, The first direction is perpendicular to the second direction.

3. The integrated forming and flanging stamping die as described in claim 1, characterized in that, The secondary forming block has a first inclined surface and a second inclined surface arranged at an angle at one end away from the support member, and the driving member has a third inclined surface and a fourth inclined surface arranged at an angle. When the upper mold assembly and the lower mold assembly approach each other, the fourth inclined surface and the first inclined surface move against each other, pushing the secondary forming block to move towards the support member, so that the secondary forming block performs the empty stroke; When the upper die assembly and the lower die assembly move away from each other, the third inclined surface and the second inclined surface move together, pushing the secondary forming block toward the support member, so that the secondary forming block performs the stamping stroke.

4. The integrated forming and flanging stamping die as described in claim 3, characterized in that, Along the direction in which the upper die assembly and the lower die assembly approach each other, the angle between the first inclined surface and / or the fourth inclined surface and the direction in which the upper die assembly and the lower die assembly approach each other is smaller than the angle between the second inclined surface and / or the third inclined surface and the direction in which the upper die assembly and the lower die assembly approach each other, so that the displacement of the secondary forming block when it is in the idle stroke is smaller than the displacement when it is in the stamping stroke.

5. The integrated forming and flanging stamping die as described in claim 3, characterized in that, The extension length of the driving member on the upper mold assembly is greater than the pressing depth length of the primary forming block on the upper mold assembly, so that when the upper mold assembly and the lower mold assembly are close together, after the fourth inclined surface has passed the first inclined surface, the primary forming block begins to perform a stamping operation on the sheet metal.

6. The integrated forming and flanging stamping die as described in claim 3, characterized in that, The secondary forming block is provided with a driven block, and the lower mold assembly includes a pad block. The pad block movably abuts against the secondary forming block to provide support for the secondary forming block. The pad block is provided with a first elastic element, and one end of the first elastic element abuts against the driven block. When the first inclined surface and the fourth inclined surface abut together, or when the second inclined surface and the third inclined surface abut together, the driven block and the secondary forming block move synchronously and compress the first elastic element. When the fourth inclined plane passes over the first inclined plane, or the second inclined plane passes over the third inclined plane, the first elastic element returns to its extended state and pushes the secondary molding block to reset.

7. The integrated forming and flanging stamping die as described in claim 1, characterized in that, The upper mold assembly is provided with a reset block, the reset block is provided with a fifth inclined surface, and the secondary forming block is provided with a socket for the reset block to be inserted. The socket has an opening facing the reset block, and the opening is provided with a sixth inclined surface. The sixth inclined surface and the fifth inclined surface move against each other, and are used to push the secondary forming block to reset before the primary forming block stamps the sheet metal.

8. The integrated forming and flanging stamping die as described in claim 1, characterized in that, The upper mold assembly is provided with at least two push blocks spaced apart, and the support member includes: Base; A support base is provided on the base, and a limiting member is provided on the support base. The limiting member movably abuts against one end of the plate placed on the support base. The positioning blocks are arranged at intervals along the extension direction of the plate and are movably mounted on the base. Each positioning block includes two limiting parts arranged opposite to each other. One of the limiting parts is located at the end of the support seat facing the secondary forming block, and the other is located at the end of the support seat away from the secondary forming block. The limiting part and the two limiting parts together provide limiting for the plate. Guide members, which are disposed on the base and correspond one-to-one with the positioning blocks, are used to guide the movement of the positioning blocks; The second elastic element is disposed inside the base and one end extends into the positioning block; When the upper mold assembly and the lower mold assembly approach each other and the pushing block presses against the plate, the pushing block abuts against the positioning block, presses the positioning block into the base, and compresses the second elastic member; When the upper mold assembly and the lower mold assembly separate from each other, the second elastic element extends and pushes the positioning block to reset.

9. The integrated forming and flanging stamping die as described in claim 8, characterized in that, The secondary molding block is provided with a clearance groove, and the positioning block is movably inserted into the clearance groove. When the secondary forming block is in the idle stroke or the stamping stroke, one end of the positioning block is inserted into the clearance groove to provide clearance space for the movement of the secondary forming block.

10. The integrated forming and flanging stamping die as described in claim 1, characterized in that, The upper mold component includes: A connecting seat, wherein the driving component is fixedly connected to the connecting seat, and a third elastic element is provided on the connecting seat; The mounting base is disposed on the connecting base, the one-piece molded block is fixedly connected to the mounting base, and the pressing block is movably disposed on the mounting base and abuts against one end of the third elastic member.

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