A linkage type two-way flanging device for a stamping die

Abstract

The utility model discloses a kind of stamping die linkage type two-way flanging device, it is related to stamping die technical field.It includes the lower die seat of punch installation, the inside flanging slider of punch side is equipped with by first guide mechanism horizontal sliding installation in lower die seat, and inside flanging slider is equipped with inside flanging insert piece;Inside flanging slider side is equipped with by second guide mechanism sliding installation in lower die seat on the upper flanging slider, and upper flanging slider is equipped with upper flanging insert piece;Inside flanging slider is equipped with upper flanging drive guide plate, and upper flanging slider is equipped with the flat guide plate a of friction fit with upper flanging drive guide plate.The utility model provides a kind of stamping die linkage type two-way flanging device, it is in extremely limited mould space, by a single drive source, efficiently, reliably, simultaneously complete two different directions flanging process.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a linkage bidirectional flanging device for stamping dies. Background Technology

[0002] In the stamping production of automotive body panels, to achieve assembly welding and improve structural rigidity and dimensional accuracy, parts are often designed with flanging features in different directions, such as long flanging on the long side and additional lugs. Currently, the automotive manufacturing industry faces enormous cost pressures and generally strives to reduce the number of mold processes, compress the manufacturing cost and space occupied by a single mold set. Therefore, how to integrate multiple flanging processes in different directions within the limited mold structural space has become a key challenge in the field of mold design.

[0003] When a part has both upward and inward flanging in a localized area, existing technologies typically employ two independent wedge mechanisms to achieve flanging in different directions. However, this traditional method has a series of inherent and insurmountable drawbacks, specifically in the following aspects: 1. Defects in spatial layout and process integration: When a part has both upward and inward flanging in a localized area, the traditional approach is to design two independent wedge mechanisms. This undoubtedly increases the lateral dimensions and structural complexity of the mold significantly. Under conditions of tight process schedules and limited mold space, the two mechanisms are often difficult or even impossible to arrange side by side, making it impossible to complete all the opposite flanging processes on a single mold. This forces the addition of processes, which runs counter to the industry goal of cost reduction and efficiency improvement. 2. Defects of Large Stroke and Mold Compactness: To ensure smooth part handling by the robot, the flanging slider requires a sufficiently large retraction stroke. Traditional stepped (or "stepped") drive guide plate designs have a "no-stroke" phase before work begins, meaning the drive block only contacts the slider after the upper die has traveled a certain distance. To obtain the required working stroke, the total stroke of the upper die must be further increased, which directly leads to an increase in the mold's closed height and overall dimensions, increasing mold manufacturing costs and the space occupied by the press platform. 3. Defects in the Motion and Stress Stability of Non-standard Sliders: For "twisted" non-standard wedge sliders (such as the upward-flanged slider in this case) where the direction of motion is inconsistent with both the driving direction and the direction of the force applied to the flange, motion stability and lifespan are the biggest challenges. In traditional designs, the driving force on the slider forms an angle with its motion direction, while the flange insert also bears a lateral force perpendicular to the motion direction. This inconsistent force in multiple directions easily leads to "jamming," "shoulder lifting," or abnormal wear of the slider during motion. Furthermore, conventional rectangular guide plate layouts are insufficient to effectively constrain this complex composite force state, causing changes in the motion clearance after being subjected to force, further exacerbating motion instability and wear, and severely affecting the production stability and service life of the mold. 4. Safety and Reliability Defects: For complex wedge mechanisms, especially those with reciprocating motion components, the safety of the return stroke is crucial. If traditional designs do not consider the timing and mutual interference between linkage mechanisms, if one slider fails to return properly for any reason, it is very likely to collide violently with another unreset slider during the next downward movement of the upper mold, causing damage to the core components of the mold or even a serious equipment accident. Utility Model Content

[0004] The purpose of this invention is to provide a linkage-type bidirectional flanging device for stamping dies, which can efficiently and reliably complete the flanging process in two different directions simultaneously through a single drive source within an extremely limited die space.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is: a linkage-type bidirectional flanging device for stamping dies, including a lower die base on which a punch is installed, an inner flanging slider on one side of the punch being horizontally slidably mounted on the lower die base via a first guide mechanism, and an inner flanging insert on the inner flanging slider for flanging the part on the punch inward; an upper flanging slider on one side of the inner flanging slider being slidably mounted on the lower die base via a second guide mechanism, and an upper flanging insert on the upper flanging slider for flanging the part on the punch obliquely upward; The inner flange slider is provided with an upper flange driving guide plate, and the upper flange slider is provided with a flat guide plate a that is in frictional cooperation with the upper flange driving guide plate and can drive the upper flange slider to move obliquely upward through the horizontal movement of the inner flange slider.

[0006] As a further improvement of this utility model, the first guiding mechanism includes a cover plate c and a cover plate d disposed on the lower mold base, which can constrain the movement path of the inner flange slider in the vertical direction. The cover plate c and the cover plate d are respectively located on both sides of the movement path of the inner flange slider.

[0007] As a further improvement of this utility model, a mold base guide plate b is also provided on the lower mold base below the inner flange slider, which slides and engages with the inner flange slider.

[0008] As a further improvement of this utility model, the second guiding mechanism includes a plurality of wear-resistant guide plates respectively disposed around the upper flange slider. The lower mold base is provided with a mold base guide plate a that slides and engages with the wear-resistant guide plates, and cover plate a and cover plate b that jointly constrain the movement path of the upper flange slider. The cover plate a and cover plate b are respectively located on both sides of the movement path of the upper flange slider, and the mold base guide plate a is located below the upper flange slider.

[0009] As a further improvement of this utility model, the lower surface of the upper flange slider is also provided with a concave V-shaped guide plate arranged along its moving path, and the lower mold base is provided with a convex V-shaped guide plate that slides and contacts the concave V-shaped guide plate.

[0010] As a further improvement of this utility model, the plurality of wear-resistant guide plates include slider guide plate a, slider guide plate b, slider guide plate c and slider guide plate d, the upper flange slider is provided with a nitrogen cylinder b for driving its return stroke, and the lower mold base is provided with a nitrogen cylinder top block that is in tight contact with the free end of nitrogen cylinder b.

[0011] As a further improvement of this utility model, the inner flanging slider is provided with a driving block that can move up and down on the side away from the punch, and the driving block is provided with an inner flanging driving guide plate. The inner flanging slider is provided with a flat guide plate b that frictionally engages with the inner flanging driving guide plate and can drive the inner flanging slider to move horizontally by the up and down movement of the driving block. The inner flanging slider extends to the bottom of the punch on the side close to the punch and is provided with a nitrogen cylinder a for driving the return stroke of the inner flanging slider.

[0012] As a further improvement of this utility model, the inner flange slider is provided with a return wedge block parallel to the flat guide plate b on the side wall on one side of its movement direction, and the driving block is provided with a return wedge pull plate for assisting the return stroke of the inner flange slider by frictional engagement with the outer wall of the return wedge block.

[0013] As a further improvement of this utility model, a limiting block is provided on the inner wall of the lower mold base below the drive block to limit the return position of the inner flange slider.

[0014] As a further improvement of this utility model, the upper flange driving guide plate is a steel flat guide plate, and the flat guide plate a is a copper flat guide plate, and the two always remain in contact during operation.

[0015] Beneficial effects Compared with the prior art, the advantages of the linkage bidirectional flanging device for stamping dies of this utility model are as follows: 1. Solved the defects in spatial layout and process integration: Through the innovative linkage design of "slider driving slider", the inner flanging slider is used as the driving source of the upper flanging slider, realizing the integration of two sets of flanging functions (inward and oblique upward); in addition, the inner flanging slider and the upper flanging slider share the same driving and installation space, the structure is extremely compact, and the opposite double flanging process is successfully completed in the narrow space of a single mold, effectively reducing the number of mold processes; 2. Solved the defects of large stroke and mold compactness: Abandoned the traditional stepped guide plate, and pioneered the use of double flat guide plates in the linkage drive surface (upper flange drive guide plate and flat guide plate a). This design makes the drive contact continuous from the beginning to the end of the stroke, with no idle stroke. Under the premise of obtaining the same working stroke, the total stroke required for the upper mold is greatly reduced, thereby reducing the mold closing height and overall size, and saving manufacturing costs. 3. Solved the defects in motion and force stability: Targeted guiding layout: To cope with the complex forces on the upper-flipping slider (upper-flipping slider driving force F2, upper-flipping slider movement direction V2, upper-flipping slider lateral force F1), a multi-guide protection system was designed. In addition to the conventional wear-resistant guide plate, concave V-shaped guide plates and convex V-shaped guide plates were specially added to accurately control the key gaps and ensure the stability of the gaps after being subjected to force. Targeted force balancing: By scientifically distributing support guides (such as slider guide a and slider guide d), the torque generated by the inconsistency between the driving force F2 of the upper flange slider and the movement direction V2 of the upper flange slider is balanced. The upper flange driving guide also bears the lateral force F4 of the inner flange slider, ensuring that the slider moves smoothly and reliably under torsional stress, which greatly improves production stability and mold life. 4. Resolved safety and reliability deficiencies: A forced safety return mechanism consisting of a return wedge plate and a return wedge block was installed. This mechanism ensures that the inner flange slider must return to its initial position first and forcibly, thus making room for the return stroke of the upper flange slider. Combined with the action of nitrogen cylinders a and b, it ensures that the two sliders can return safely and orderly in sequence, fundamentally avoiding the impact risk caused by the sliders not returning to their original position, and ensuring the safety of the mold and press.

[0016] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the two sliders of this utility model in action; Figure 2 This is a diagram showing the installation structure of the two sliders in the mold according to this utility model; Figure 3 This is a schematic diagram showing the cooperation between the inner flange slider and the pressure block b of this utility model; Figure 4 This is a schematic diagram showing the cooperation between the upper flange slider and the pressure block a in this utility model; Figure 5 This is a schematic diagram of the forces acting on the upper flange slider of this utility model; Figure 6 This is a perspective view of the upper flange slider of this utility model; Figure 7This is a force diagram of the inner flange slider of this utility model; Figure 8 This is a schematic diagram of the structure of the lower mold base of this utility model.

[0019] Wherein: 1-Lower mold base; 2-Inner flange slider; 3-Upper flange slider; 4-Upper flange insert; 5-Inner flange insert; 6-Nitrogen cylinder a; 7-Nitrogen cylinder b; 8-Slider guide plate a; 9-Slider guide plate b; 10-Punch; 11-Pressure block a; 12-Slider guide plate c; 13-Concave V-shaped guide plate; 14-Slider guide plate d; 15-Convex V-shaped guide plate; 16-Nitrogen cylinder top block; 17-Cover plate a; 18-Cover plate b; 19-Mold base guide plate a; 20-Cover plate c; 21-Limiting block; 22-Cover plate d; 23-Mold base guide plate b; 24-Upper flange drive guide plate; 25-Flat guide plate a; 27-Pressure block b; 28-Drive block; 29-Flat guide plate b; 30-Inner flange drive guide plate; 31-Return wedge block; 32-Return wedge pull plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] Example: The specific embodiments of this utility model are as follows: Figure 1-8As shown, a linkage-type bidirectional flanging device for stamping dies includes a lower die base 1, on which a punch 10 is mounted. An inner flanging slider 2 is provided on one side of the punch 10, and a pressure block b27 is correspondingly provided on the upper die base above the inner flanging slider 2. The inner flanging slider 2 is horizontally slidably mounted on the lower die base 1 along the movement direction V1 of the inner flanging slider 2 via a first guide mechanism. The first guide mechanism includes a cover plate c20 and a cover plate d22, located on both sides of the movement path of the inner flanging slider 2, respectively, for constraining the movement path of the inner flanging slider 2 in the vertical direction. A die base guide plate b23 is also provided on the lower die base 1 below the inner flanging slider 2, which slides in contact with the inner flanging slider 2, providing bottom support and guidance.

[0024] An inner flanging insert 5 is installed on the inner flanging slider 2 for flanging the part on the punch 10 inward. An upper flanging slider 3 is also provided on one side of the inner flanging slider 2, and a pressure block a11 is correspondingly provided on the upper die base above the upper flanging slider 3. The upper flanging slider 3 is slidably mounted on the lower die base 1 along the movement direction V2 of the upper flanging slider 3 via a second guide mechanism. The second guide mechanism includes slider guide plate a8, slider guide plate b9, slider guide plate c12, and slider guide plate d14, which are respectively installed around the upper flanging slider 3. Correspondingly, the lower die base 1 is provided with a die base guide plate a19, a cover plate a17, and a cover plate b18—cover plate a17 and cover plate b18 are located on both sides of the movement path of the upper flanging slider 3, and die base guide plate a19 is located below the upper flanging slider 3. The mold base guide plate a19 slides in contact with the wear-resistant guide plate, and the cover plate a17 and cover plate b18 together constrain the upward movement path of the upper flange slider 3. An upper flange insert 4 is installed on the upper flange slider 3 for bending the part on the punch 10 upward at an angle.

[0025] The lower surface of the upper flanging slider 3 is provided with a concave V-shaped guide plate 13 arranged along its moving path, and the lower mold base 1 is provided with a convex V-shaped guide plate 15. The two slide in contact to precisely control the critical clearance of the upper flanging slider 3 and ensure the clearance is stable after being subjected to force. A nitrogen cylinder b7 is also installed on the upper flanging slider 3, and a nitrogen cylinder top block 16 is provided on the lower mold base 1. The free end of the nitrogen cylinder b7 is in tight contact with the nitrogen cylinder top block 16 to drive the upper flanging slider 3 to return.

[0026] The inner flange slider 2 is equipped with an upper flange drive guide plate 24, and the upper flange slider 3 is equipped with a flat guide plate a25, which are in planar friction fit. The upper flange drive guide plate 24 is a steel flat guide plate, and the flat guide plate a25 is a copper flat guide plate, which always maintains contact during operation. The horizontal movement of the inner flange slider 2 drives the upper flange slider 3 to move obliquely upward.

[0027] A drive block 28 is provided on the side of the inner flanging slider 2 away from the punch 10. The drive block 28 can move up and down. An inner flanging drive guide plate 30 is provided on the drive block 28, and a flat guide plate b29 is provided on the inner flanging slider 2. The two are in planar frictional engagement. The inner flanging slider 2 is driven to move horizontally by the up and down movement of the drive block 28. The side of the inner flanging slider 2 closest to the punch 10 extends to the bottom of the punch 10 and is equipped with a nitrogen cylinder a6 to provide power for the return stroke of the inner flanging slider 2.

[0028] A return wedge block 31 is provided on the side wall of the inner flange slider 2, and the return wedge block 31 is parallel to the flat guide plate b29. A return wedge pull plate 32 is provided on the drive block 28, and the return wedge pull plate 32 is in frictional engagement with the outer wall of the return wedge block 31 to assist in driving the return stroke of the inner flange slider 2. A limit block 21 is provided on the inner wall of the lower mold base 1 below the drive block 28 to limit the return position of the inner flange slider 2.

[0029] The working process and beneficial effects of this invention are as follows: When the upper die descends, the drive block 28 moves downward with the upper die. Through the cooperation of the inner flange drive guide plate 30 and the flat guide plate b29, it drives the inner flange slider 2 to move horizontally towards the punch 10, and the inner flange insert 5 begins to flange the part inward. At the same time, the inner flange slider 2, through the cooperation of the upper flange drive guide plate 24 and the flat guide plate a25, drives the upper flange slider 3 to move obliquely upward, and the upper flange insert 4 begins to flange the part obliquely upward.

[0030] This invention integrates two flanging functions by using an innovative "slider-driven slider" linkage design, where the inner flanging slider 2 serves as the driving source for the upper flanging slider 3. The inner flanging slider 2 and the upper flanging slider 3 share the same driving and mounting space, resulting in an extremely compact structure. This successfully completes the opposite-direction double flanging process within the confined space of a single mold, effectively reducing the number of mold processes and resolving spatial layout and process integration defects.

[0031] Notably, by abandoning the traditional stepped guide plate and pioneering the use of double flat guide plates on the linkage drive surface, this design ensures that the drive contact continues from the beginning to the end of the stroke, with no idle stroke. While achieving the same working stroke, it significantly reduces the total stroke required for the upper mold, thereby lowering the mold's closing height and overall size, saving manufacturing costs, and resolving the defects of large stroke and mold compactness.

[0032] Furthermore, to address the complex stress conditions of the upper flange slider, this invention incorporates a multi-guided protection system. In addition to conventional wear-resistant guide plates, a concave V-shaped guide plate 13 and a convex V-shaped guide plate 15 are specially added to precisely control critical clearances and ensure clearance stability under stress. Simultaneously, the scientifically distributed support guide plates balance the torque generated by the inconsistency between the driving force F2 and the movement direction V2 of the upper flange slider 3, and the upper flange driving guide plate 24 bears the lateral force F4 of the inner flange slider 2, ensuring smooth and reliable slider movement even under torsional stress. This significantly improves production stability and mold life, resolving defects in movement and stress stability.

[0033] A forced safety return mechanism consisting of a return wedge plate 32 and a return wedge block 31 is provided. This mechanism ensures that the inner flange slider 2 must return to its initial position first and forcibly, thereby making room for the return stroke of the upper flange slider 3. Combined with the action of nitrogen cylinders a6 and b7, it ensures that the two sliders can return safely and orderly in sequence, fundamentally avoiding the impact risk caused by the sliders not being reset, ensuring the safety of the mold and press, and solving the safety and reliability defects.

[0034] After the work is completed, the upper mold moves upward, and the drive block 28 moves upward. First, the return wedge plate 32 cooperates with the return wedge block 31 to forcefully pull the inner flange slider 2 back, with the nitrogen cylinder a6 assisting in the return. After the inner flange slider 2 returns to the limit block 21, it makes room for the return of the upper flange slider 3. Subsequently, the nitrogen cylinder b7 generates the upper flange slider reset force F3, pushing the upper flange slider 3 back until all components are reset.

[0035] This invention achieves sequential driving of the inward and upward flanging through a linkage design, resulting in a compact structure, stable motion, and safe return stroke. It effectively solves the problems of space occupation, unstable motion, and safety hazards of traditional double wedge mechanisms.

[0036] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A linkage-type bidirectional flanging device for stamping dies, comprising a lower die base (1) on which a punch (10) is mounted, characterized in that, The punch (10) has an inner flange slider (2) that is horizontally slidably mounted on the lower die base (1) via a first guide mechanism on one side, and the inner flange slider (2) has an inner flange insert (5) for flange the parts on the punch (10) inward; the inner flange slider (2) has an upper flange slider (3) that is slidably mounted on the lower die base (1) via a second guide mechanism on one side, and the upper flange slider (3) has an upper flange insert (4) for flange the parts on the punch (10) obliquely upward. The inner flange slider (2) is provided with an upper flange driving guide plate (24), and the upper flange slider (3) is provided with a flat guide plate a (25) that is in plane frictional cooperation with the upper flange driving guide plate (24) and can drive the upper flange slider (3) to move obliquely upward through the horizontal movement of the inner flange slider (2).

2. The linkage-type bidirectional flanging device for stamping dies according to claim 1, characterized in that, The first guiding mechanism includes a cover plate c (20) and a cover plate d (22) disposed on the lower mold base (1) and capable of constraining the movement path of the inner flange slider (2) in the vertical direction. The cover plate c (20) and the cover plate d (22) are respectively located on both sides of the movement path of the inner flange slider (2).

3. The linkage-type bidirectional flanging device for stamping dies according to claim 2, characterized in that, The lower mold base (1) below the inner flange slider (2) is also provided with a mold base guide plate b (23) that slides and engages with the inner flange slider (2).

4. The linkage-type bidirectional flanging device for stamping dies according to claim 1, 2, or 3, characterized in that, The second guiding mechanism includes multiple wear-resistant guide plates respectively arranged around the upper flange slider (3). The lower mold base (1) is provided with a mold base guide plate a (19) that slides and engages with the wear-resistant guide plates, and cover plate a (17) and cover plate b (18) that jointly constrain the movement path of the upper flange slider (3). The cover plate a (17) and cover plate b (18) are located on both sides of the movement path of the upper flange slider (3), and the mold base guide plate a (19) is located below the upper flange slider (3).

5. The linkage-type bidirectional flanging device for stamping dies according to claim 4, characterized in that, The lower surface of the upper flange slider (3) is also provided with a concave V-shaped guide plate (13) arranged along its moving path, and the lower mold base (1) is provided with a convex V-shaped guide plate (15) that slides and contacts the concave V-shaped guide plate (13).

6. The linkage-type bidirectional flanging device for stamping dies according to claim 4, characterized in that, The wear-resistant guide plates include slider guide plate a (8), slider guide plate b (9), slider guide plate c (12) and slider guide plate d (14). The upper flange slider (3) is provided with a nitrogen cylinder b (7) for driving its return stroke, and the lower mold base (1) is provided with a nitrogen cylinder top block (16) that is in tight contact with the free end of the nitrogen cylinder b (7).

7. The linkage-type bidirectional flanging device for stamping dies according to claim 1, characterized in that, The inner flanging slider (2) is provided with a drive block (28) that can move up and down on the side away from the punch (10), and the drive block (28) is provided with an inner flanging drive guide plate (30). The inner flanging slider (2) is provided with a flat guide plate b (29) that is in frictional cooperation with the inner flanging drive guide plate (30) and can drive the inner flanging slider (2) to move horizontally by the up and down movement of the drive block (28). The inner flanging slider (2) extends to the bottom of the punch (10) on the side close to the punch (10), and is provided with a nitrogen cylinder a (6) for driving the return stroke of the inner flanging slider (2).

8. The linkage-type bidirectional flanging device for stamping dies according to claim 7, characterized in that, The inner flange slider (2) has a return wedge block (31) parallel to the flat guide plate b (29) on its side wall in the direction of movement. The drive block (28) has a return wedge pull plate (32) that is in frictional cooperation with the outer wall of the return wedge block (31) to assist in driving the return stroke of the inner flange slider (2).

9. The linkage-type bidirectional flanging device for stamping dies according to claim 7 or 8, characterized in that, The inner wall of the lower mold base (1) below the drive block (28) is provided with a limiting block (21) for limiting the return position of the inner flange slider (2).

10. The linkage-type bidirectional flanging device for stamping dies according to claim 1, characterized in that, The upper flange drive guide plate (24) is a steel flat guide plate, and the flat guide plate a (25) is a copper flat guide plate, and the two always remain in contact during operation.

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