Multi-linkage inclined wedge mechanism for eliminating negative angle

Abstract

The utility model discloses a multi-linkage inclined wedge mechanism for eliminating a negative angle, which belongs to the technical field of stamping dies and is characterized by comprising an upper body, a suspension slider, an operation insert, a lower body, a driving block and a cover plate, and the suspension slider is slidably connected with the upper body; the lower end of the suspension sliding block is connected with the second guide plate; a driving block is mounted on the lower body, the driving block is in sliding connection with the lower body, and the driving block is in sliding connection with the lower body; a first stroke guide plate is mounted at the other side end of the driving block; a base is installed on the lower body, and the two sides of the base are connected with the lower body in a sliding mode. Compared with the prior art, the device has the characteristics of reduced size and convenience in arrangement of the driving blocks.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a multi-linkage oblique wedge stamping mechanism for eliminating negative angles. Background Technology

[0002] Automobile manufacturing involves four main processes: stamping, welding, painting, and final assembly. During stamping, the rolled material used for automotive body panels undergoes processes such as shearing, drawing, trimming, punching, flanging, and shaping to become sheet metal parts. Due to the requirements of final assembly, sheet metal parts often have negative angles. During the flanging and shaping processes, if a negative angle is formed on the sheet metal after the work is completed, and no measures are taken to avoid it during removal, the sheet metal part will be stuck and unable to be removed. Therefore, when a negative angle is formed after work, a structure must be designed in the mold to avoid it.

[0003] Currently, in existing technologies, there are two main types of structures commonly used in mold design to eliminate negative angles: the rotary wedge structure and the double-moving slider wedge structure. These two structures are widely used, but some problems have gradually been discovered in practical applications.

[0004] When using a rotating wedge structure, the structural design eliminates interference at the negative angle by rotating the axis by a certain angle, and the space occupied is relatively small. However, a series of problems were discovered during the manufacturing process:

[0005] ① When machining a rotating shaft, a counterweight needs to be designed for the shaft to maintain rotational balance. This involves creating a casting that complements the existing rotating shaft to form a cylinder with it, in order to maintain balance during rotation.

[0006] ② The variety of materials used in the rotating wedge: In order to avoid the frequent rotation of the rotating shaft and the sticking of the contacting components during operation, the rotating shaft is made of different materials than the base and cover plate; the material of the cover plate is also different depending on whether there is any work to be done.

[0007] ③ The most significant factor affecting the wedge structure is the high processing cost. The type of rotating shaft used varies depending on the part of the sheet metal component. Some are through shafts, some are through shafts on one side, some are tapered shafts, and some are stepped shafts. This places high demands on machining, which is why the machining cost of rotating wedges has always remained high.

[0008] When using a double-acting slider wedge, the structural design eliminates interference at the negative angle by retracting the slider a certain distance. While this structure solves the problem of high machining costs for the rotating shaft, the overall structure occupies a relatively large space, which brings some difficulties during the structural design process.

[0009] ① The structure occupies a large space, and some of the protruding structures, such as the drive block, are more likely to interfere with the robotic arm that picks up parts during operation.

[0010] ② The structure occupies a large space, making it difficult to design structures for smaller sheet metal parts or areas with limited space.

[0011] ③ The double slider wedge requires integrated consideration of the operation sequence of the slider, the pressure core and the suspension wedge. It requires a good understanding of the entire operation sequence and stroke diagram before it can be used. Utility Model Content

[0012] The purpose of this invention is to address the shortcomings of the existing technology by providing a multi-linkage wedge stamping mechanism that eliminates negative angles, thereby solving the problem of difficult arrangement of drive blocks.

[0013] This utility model provides a multi-linkage wedge stamping mechanism for eliminating negative angles, characterized in that it includes an upper mold body, a suspension slider, a working insert, a lower mold body, a drive block, and a cover plate. The suspension slider is slidably connected to the upper mold body, and the suspension slider and the upper mold body are connected by a first nitrogen spring. The lower end of the suspension slider is connected to a second guide plate. During operation, the suspension slider contacts the guide surface of the lower mold body through the second guide plate, and the working insert installed on the suspension slider performs the operation. A drive block is installed on the lower mold body. The two sides of the drive block are slidably connected to the lower mold body through third guide plates, and the bottom of the drive block is slidably connected to the lower mold body through a fourth guide plate. The bottom of the drive block is connected to the lower mold body through a second nitrogen spring. A first stroke guide plate is installed on the other end of the drive block, which rests on the drive block. A base is installed on the lower body, with both sides of the base slidably connected to the lower body. A second stroke guide plate is installed at one end of the base, and the second stroke guide plate contacts the first stroke guide plate. The second stroke guide plate and the first stroke guide plate are respectively provided with corresponding inclined surfaces. The base is slidably engaged with the upper slider and slidably connected to the lower body. The base is connected to the cover plate via a third nitrogen spring, and the third nitrogen spring rests on the cover plate. An upper slider is installed above the drive block, with both ends of the upper slider slidably connected to the cover plate. The upper part of the upper slider engages with the cover plate, and the lower part engages with the drive block. A fourth nitrogen spring is installed on the upper part of the upper slider, with its other end resting on the cover plate. The cover plate is fixed to the lower body.

[0014] Furthermore, two first pressure plates are installed on the upper body, and the suspension slider is placed between the two first pressure plates. First guide plates are installed at both ends of the suspension slider, and the first guide plates are slidably connected to the upper body, so that the suspension slider can only move in one direction relative to the upper body.

[0015] Furthermore, a first limiting block is installed at the end of the upper body, which limits the stroke of the suspension slider.

[0016] Furthermore, a first V-shaped guide plate is installed on the lower body, and a V-shaped groove is provided at the upper end of the suspension slider. The first V-shaped guide plate and the V-shaped groove of the suspension slider are slidably engaged.

[0017] Furthermore, the lower body is equipped with a forced return hook, which hooks onto the two end walls of the suspended slider to prevent the suspended slider from rising directly during the return stroke after the operation is completed.

[0018] Furthermore, a second V-shaped guide plate is installed on the lower body, and a V-shaped groove is provided at the lower end of the drive block. The second V-shaped guide plate is placed in the V-shaped groove of the drive block, and the two slide together. The second V-shaped guide plate guides the movement of the drive block and the lower body.

[0019] Furthermore, a second pressure plate is installed on the lower body, and the second pressure plate and the lower body form a sliding groove. The base is placed in the sliding groove between the second pressure plate and the lower body, so that the base can only slide in one direction.

[0020] Compared with the prior art, the present invention has the following outstanding advantages:

[0021] 1. This utility model utilizes a combination of suspended wedges and reverse wedges to eliminate the negative angle of the product, enabling sequential positioning and operation according to the stroke sequence;

[0022] 2. In this utility model, the multi-linkage wedge is in position before the pressure core contacts the plate, i.e., AF > AJ. When the condition is not met, the stroke OB of the suspension wedge can be increased to achieve the early positioning of the multi-linkage wedge, thereby avoiding the pressure core pressing the plate first while the multi-linkage wedge is not in position, causing the plate to be deformed by force.

[0023] 3. This utility model adopts a suspended slider drive, which eliminates the independent drive in the double-moving slider wedge and solves the problem of difficult arrangement of the drive blocks;

[0024] 4. This utility model solves the problem of excessive mold storage height and inability to enter the production line. When storing the mold, the wedge needs to be in the return state. However, the drive block of the double-acting slider wedge has a large stroke, and the nitrogen spring used for storage needs a large stroke to lift the upper mold body, resulting in a high mold storage height. When the mold enters the production line, it interferes with the doorway of the production line. The return state of the multi-linkage wedge is independent of the mold storage height, thus avoiding this kind of interference problem. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the initial working state structure of this utility model;

[0026] Figure 2This is a schematic diagram of the work completion state structure of this utility model;

[0027] Figure 3 This is a structural schematic diagram of the suspension slider part of this utility model;

[0028] Figure 4 This is a structural schematic diagram of the suspension slider part of this utility model in operation.

[0029] Figure 5 This is a schematic diagram of the drive block portion of this utility model. Figure 1 ;

[0030] Figure 6 This is a schematic diagram of the drive block portion of this utility model. Figure 2 ;

[0031] Figure 7 This is a structural schematic diagram of the base portion of this utility model;

[0032] Figure 8 This is a schematic diagram of the upper slider part of this utility model. Figure 1 ;

[0033] Figure 9 This is a schematic diagram of the upper slider part of this utility model. Figure 2 ;

[0034] Figure 10 This is a schematic diagram of the assembly structure of the upper slider of this utility model;

[0035] Figure 11 This is a structural flowchart of this utility model;

[0036] The components are as follows: 1. Upper body; 2. Suspension slider; 3. Working insert; 4. First guide plate; 5. First pressure plate; 6. Forced return hook; 7. Second guide plate; 8. First nitrogen spring; 9. First limiting block; 10. Lower body; 11. First V-shaped guide plate; 12. Drive block; 13. Third guide plate; 14. Fourth guide plate; 15. Second V-shaped guide plate; 16. Second nitrogen spring; 17. Polyurethane buffer pad; 18. Fifth guide plate; 19. First stroke guide plate; 20. Base; 21. Sixth guide plate; 22. Second pressure plate; 23. Seventh guide plate; 24. Third nitrogen spring; 25. Second limiting block; 26. Eighth guide plate; 27. Second stroke guide plate; 28. Upper slider; 29. ​​Ninth guide plate; 30. Tenth guide plate; 31. Cover plate; 32. Eleventh guide plate; 33. Positioning key; 34. Fourth nitrogen spring. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1 and 2 As shown, this utility model includes an upper body 1, a suspension slider 2, a working insert 3, a lower body 10, a drive block 12, and a cover plate 31.

[0039] like Figure 3 and 4 As shown, the suspension slider 2 is slidably connected to the upper body 1. Two first pressure plates 5 are installed on the upper body 1. The suspension slider 2 is placed between the two first pressure plates 5. First guide plates 4 are installed at both ends of the suspension slider 2. The first guide plates 4 are slidably connected to the upper body 1, so that the suspension slider 2 can only move in one direction relative to the upper body 1. The suspension slider 2 and the upper body 1 are connected by a first nitrogen spring 8. When the operation is completed, the suspension slider 2 returns to its original position by the first nitrogen spring 8. A first limiting block 9 is installed at the end of the upper body 1, and the first limiting block 9 limits the stroke of the suspension slider 2.

[0040] The lower end of the suspended slider 2 is connected to the second guide plate 7. During operation, the suspended slider 2 contacts the guide surface of the lower body 10 through the second guide plate 7. The lower body 10 is equipped with a first V-shaped guide plate, and the upper end of the suspended slider 2 is provided with a V-shaped groove. The first V-shaped guide plate 11 slides in cooperation with the V-shaped groove of the suspended slider 2. The working insert 3 installed on the suspended slider 2 performs the operation. The lower body 10 is equipped with a forced return hook 6, which hooks onto the two end walls of the suspended slider 2 to prevent the suspended slider 2 from rising directly during the return stroke after the operation is completed.

[0041] like Figure 5 and 6 As shown, a drive block 12 is installed on the lower body 10. The two sides of the drive block 12 are slidably connected to the lower body 10 through a third guide plate 13. The third guide plate 13 restricts the freedom of the drive block 12 to move left and right and rotate. The bottom of the drive block 12 is slidably connected to the lower body 10 through a fourth guide plate 14. The fourth guide plate 14 restricts the freedom of the drive block 12 to move up and down. A second V-shaped guide plate 15 is installed on the lower body 10. The lower end of the drive block 12 is provided with a V-shaped groove. The second V-shaped guide plate is placed in the V-shaped groove of the drive block 12. The two slide together and the second V-shaped guide plate guides the movement of the drive block 12 and the lower body 10.

[0042] The drive block 12 is equipped with a fifth guide plate 18 and a polyurethane buffer pad 17 on the side near the suspension slider 2. The bottom of the drive block 12 is connected to the lower body 10 through a second nitrogen spring 16. The second nitrogen spring 16 rests on the drive block 12. A first stroke guide plate 19 is installed on the other end of the drive block 12.

[0043] like Figure 7As shown, a base 20 is installed on the lower body 10. The base 20 is slidably connected to the lower body 10 on both sides through a sixth guide plate 21. A second pressure plate 22 is installed on the lower body 10. The second pressure plate 22 and the lower body 10 form a sliding groove. The base 20 is placed in the sliding groove between the second pressure plate 22 and the lower body 10, so that the base 20 can only slide in one direction. A second stroke guide plate 27 is installed at one end of the base 20. The second stroke guide plate 27 is in contact with the first stroke guide plate 19. The second stroke guide plate 27 and the first stroke guide plate 19 are respectively provided with corresponding inclined surfaces. An eighth guide plate 26 is installed at the other end of the base 20. The base 20 is slidably connected to the lower body 10 through a seventh guide plate 23. The base 20 is connected to a cover plate 31 through a third nitrogen spring 24. The third nitrogen spring 24 rests on the cover plate 31. A second limiting block 25 is installed on the lower body 10. The distance between the second limiting block 25 and the base 20 is its stroke distance.

[0044] like Figures 8-10 As shown, an upper slider 28 is installed above the drive block 12. The two ends of the upper slider 28 are slidably connected to the cover plate 31 through the ninth guide plate 29. The ninth guide plate 29 restricts the left and right freedom of the upper slider 28. The upper part of the upper slider 28 is respectively equipped with an eleventh guide plate 32, a positioning key 33 and a fourth nitrogen spring 34. The eleventh guide plate 32 cooperates with the cover plate 31. The lower part is equipped with a tenth guide plate 30 that cooperates with the drive block 12 to restrict its up and down freedom.

[0045] The base 20 is slidably engaged with the upper slider 28 via the eighth guide plate 26.

[0046] To make its movement more precise, a positioning key 33 is installed in the middle of the upper slider 28, which contacts the cover plate 31. A fourth nitrogen spring 34 is installed on the upper part of the upper slider 28, with its other end pressing against the cover plate 31. The cover plate 31 is fixed on the lower body 10.

[0047] The operation process is as follows: Figure 11As shown, during operation, the upper body 1 moves downwards with the suspended slider 2. When it reaches a distance of 93.65 mm from the closed state, the second guide plate 77 on the suspended slider 2 contacts the lower body 10. OC = 93.65 mm is the height at which the suspended slider 2 contacts the lower body 10. The operating angle of the suspended slider 2 is 11°. As the height decreases, it moves along the guide surface of the lower body 10. The suspended slider 2 contacts the drive block 12 and pushes the drive block 12 to move. The retraction angle of the upper slider 28 is 8°. At this time, the operating angle of the suspended slider 2 is different from the retraction angle of the upper slider 28. The suspended slider 22 is relative to the upper body. The travel distance of the drive block 1 is OB = 120 mm. The structural angle of the suspension slider 2 is 50°. The travel distance relative to the lower body 10 is OA = 95 mm. The return angle of OA along the upper slider 28 is decomposed into OG and AG. AG = OA·COS(11°-8°) = 94.87 mm. That is, AG is used as the drive stroke of the drive block 12. The fourth guide plate 14 of the drive block 12 moves along the guide surface of the lower body 10. The first stroke guide plate 19 of the drive block 12 contacts the second stroke guide plate 27 of the base 20 and pushes the base 20 to move in a direction perpendicular to the movement direction of the drive block 12. The seventh guide plate of the base 20... 23 moves along the guide surface of the lower body 10. JH=40MM is the stroke of the base 20. The second nitrogen spring 16 of the drive block 12 and the third nitrogen spring 24 of the base 20 are compressed. The eighth guide plate 26 of the base 20 contacts the upper slider 28 and pushes it to move. The stroke of the upper slider 28 is HK=40MM. The tenth guide plate 30 below the upper slider 28 contacts the guide surface of the drive block 12, and the eleventh guide plate 32 contacts the guide surface of the cover plate 31. The eighth guide plate 26, the tenth guide plate 30, and the eleventh guide plate 32 together restrict the upper slider 28, so that it can only move in the HK direction. The fourth nitrogen spring 3 4. Compression: At this point, the upper slider 28 is in position and aligned with the cover plate 31. The working insert 3 has not yet contacted the upper slider 28 to perform its work. Therefore, the suspended slider 2 needs to continue moving. When the distance to the closing height is 50mm, the pressure core contacts the plate to perform pressure. The suspended slider 2 continues to move. At this point, the base 20 and the upper slider 28 are in position and no longer move. The inclined plane movement of the first stroke guide plate 19 of the drive block 12 and the second stroke guide plate 27 of the base 20 ends, and the planar movement begins. The suspended slider 2 continues to move when IL=54.87mm. At this point, the working insert 3 contacts the upper slider 28 to perform its work. After the operation is completed, the upper body 1 rises, and the suspended slider 2 returns to its original position by the first nitrogen spring 8 with a stroke of OB=120MM. The drive block 12 also returns to its original position by the second nitrogen spring 16. When the return stroke is within IL=54.87MM, the base 20 and the upper slider 28 remain stationary. When the return stroke is greater than IL=54.87MM, the base 20 returns to its original position by the action of the third nitrogen spring 24 and the upper slider 28 returns to its original position by the action of the fourth nitrogen spring 34.After the return stroke is completed, the suspension slider 2 leaves together with the upper body 1. At this time, the upper slider 28 returns to its original position, and the polyurethane buffer pad 17 contacts the lower body 10 to buffer and limit the movement. The second nitrogen spring 16, the third nitrogen spring 24 and the fourth nitrogen spring 34 are in a free state. The drive block 12, the base 20 and the upper slider 28 have all returned to their original positions. At this time, the completed plate can be removed and the next operation can be carried out.

[0048] It should be noted that the specific embodiments of this utility model have been described in detail. For those skilled in the art, all obvious changes made to it without departing from the spirit and scope of this utility model are within the protection scope of this utility model.

Claims

1. A multi-linkage wedge mechanism for eliminating negative angles, characterized in that: The system includes an upper body (1), a suspension slider (2), a working insert (3), a lower body (10), a drive block (12), and a cover plate (31). The suspension slider (2) is slidably connected to the upper body (1), and the suspension slider (2) and the upper body (1) are connected by a first nitrogen spring (8). The lower end of the suspension slider (2) is connected to a second guide plate (7). During operation, the suspension slider (2) contacts the guide surface of the lower body (10) through the second guide plate (7). The suspension slider (2) is equipped with... The working insert (3) performs the operation; a driving block (12) is installed on the lower body (10). The two sides of the driving block (12) are slidably connected to the lower body (10) through the third guide plate (13), and the bottom of the driving block (12) is slidably connected to the lower body (10) through the fourth guide plate (14); the bottom of the driving block (12) is connected to the lower body (10) through the second nitrogen spring (16), the second nitrogen spring (16) is pressed against the driving block (12), and the other end of the driving block (12) is equipped with a first stroke guide plate. (19); A base (20) is installed on the lower body (10). The two sides of the base (20) are slidably connected to the lower body (10). A second stroke guide plate (27) is installed at one end of the base (20). The second stroke guide plate (27) is in contact with the first stroke guide plate (19). The second stroke guide plate (27) and the first stroke guide plate (19) are respectively provided with corresponding inclined surfaces. The base (20) is slidably engaged with the upper slider (28). The base (20) is slidably connected to the lower body (10). The base (20) is connected to the upper body (10). The third nitrogen spring (24) is connected to the cover plate (31), and the third nitrogen spring (24) rests on the cover plate (31); an upper slider (28) is installed above the drive block (12), and the two ends of the upper slider (28) are slidably connected to the cover plate (31). The upper part of the upper slider (28) cooperates with the cover plate (31), and the lower part cooperates with the drive block (12); a fourth nitrogen spring (34) is installed on the upper part of the upper slider (28), and its other end rests on the cover plate (31). The cover plate (31) is fixed on the lower body (10).

2. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The upper body (1) is equipped with two first pressure plates (5), and the suspension slider (2) is placed between the two first pressure plates (5). The two ends of the suspension slider (2) are equipped with first guide plates (4), and the first guide plates (4) are slidably connected to the upper body (1), so that the suspension slider (2) can only move in one direction relative to the upper body (1).

3. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The upper body (1) is equipped with a first limiting block (9) at its end, which limits the stroke of the suspension slider (2).

4. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The lower body (10) is equipped with a first V-shaped guide plate (11), and the upper end of the suspension slider (2) is provided with a V-shaped groove. The first V-shaped guide plate (11) and the V-shaped groove of the suspension slider (2) are in sliding cooperation.

5. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The lower body (10) is equipped with a forced return hook (6), which hooks onto the two end walls of the suspended slider (2) to prevent the suspended slider (2) from rising directly during the return stroke after the operation is completed.

6. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The lower body (10) is equipped with a second V-shaped guide plate (15), and the lower end of the drive block (12) is provided with a V-shaped groove. The second V-shaped guide plate (15) is placed in the V-shaped groove of the drive block (12), and the two slide together. The second V-shaped guide plate (15) guides the movement of the drive block (12) and the lower body (10).

7. The multi-linkage wedge mechanism for eliminating negative angles according to claim 1, characterized in that: The lower body (10) is equipped with a second pressure plate (22), which forms a groove with the lower body (10). The base (20) is placed in the groove between the second pressure plate (22) and the lower body (10), so that the base (20) can only slide in one direction.

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