A buffer type traceless bending precision die

Abstract

The application relates to the technical field of sheet metal machining, in particular to a buffer type traceless bending precision die, which comprises a fixed plate, a movable seat, a sliding rod, spring one, spring two and a rotating roller; mounting feet are arranged on the two sides of the fixed plate; the movable seat is connected with the fixed plate through the sliding rod; spring one and spring two with different elastic coefficients are arranged on the sliding rod to realize gradient buffering; an arc groove with a limiting groove is arranged at the top of the movable seat; the rotating roller with a limiting ring, a horizontal plane and a vertical chamfer is slidably arranged in the arc groove. When bending, the movable seat is displaced through spring buffering; the sheet metal part is in rolling contact with the rotating roller and drives the rotating roller to slide along the arc groove; and traceless bending is completed in cooperation with the chamfer. The die realizes the unification of buffering protection, traceless machining and bending precision, and solves the problems of easy leaving of pressure marks and insufficient buffering of traditional dies.

Description

Technical Field

[0001] This application relates to the technical field of sheet metal processing, and in particular to a buffer-type non-marking bending precision mold. Background Technology

[0002] In the field of sheet metal processing, traditional bending dies mostly adopt a rigid contact structure. During the bending process, the die directly and rigidly compresses the sheet metal part, which easily leaves defects such as indentations and scratches on the sheet metal surface, affecting the product's appearance and quality. At the same time, traditional dies lack a cushioning structure, and the impact force during bending easily leads to accelerated wear of die components, shortening the die's service life. Although some improved dies have added a single spring cushioning, the cushioning effect is insufficient, and the contact friction problem during the bending process has not been solved, so high-precision, mark-free bending cannot be achieved. Therefore, to solve the above problems, this application provides a cushioned, mark-free precision bending die. Utility Model Content

[0003] To address the aforementioned issues, this application provides a buffer-type, non-marking bending precision mold.

[0004] This application provides a buffer-type, non-marking bending precision mold, comprising:

[0005] A fixing plate, wherein mounting feet are provided on both sides of the fixing plate for fixing to the outside;

[0006] The movable seat is positioned above the fixed plate;

[0007] Several sliding rods are evenly distributed below the movable seat and pass through the fixed plate;

[0008] Spring 1 is slidably mounted on the slide rod on the lower side of the fixed plate, and its two ends are respectively fixed to the limiting piece and the fixed plate at the bottom of the slide rod;

[0009] Spring 2 is slidably mounted on the slide rod on the upper side of the fixed plate;

[0010] The rotating roller is slidably embedded in the arc groove at the top of the movable seat. The top of the rotating roller is a horizontal surface, the side is provided with a vertical chamfer, and the outer wall is provided with a limiting ring that cooperates with the limiting groove inside the arc groove.

[0011] The top of the movable seat has symmetrical arc grooves, and a downward groove is provided at the intersection of the two arc grooves.

[0012] Preferably, the mounting feet are symmetrically distributed at both ends of the fixing plate, and fixing holes are provided on the mounting feet.

[0013] Preferably, the number of slide rods is at least 4, and they are evenly arranged along the length of the movable seat.

[0014] Preferably, the curvature of the arc groove is adapted to the curvature of the outer wall of the rotating roller, and the rotating roller can slide along the extension direction of the arc groove.

[0015] Preferably, the limiting ring of the rotating roller is embedded in the limiting groove, and the thickness of the limiting ring is not greater than the depth of the limiting groove.

[0016] Preferably, the vertical chamfer of the rotating roller is located on the side of the rotating roller near the groove, and the inclination angle of the chamfer is 30°-60°.

[0017] Preferably, both spring one and spring two are compression springs, and the elastic coefficient of spring one is greater than that of spring two.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] The gradient buffer structure of "Spring 1 + Spring 2" achieves flexible buffering during the movement of the movable seat, avoiding damage to the mold and sheet metal parts from rigid impacts. At the same time, the rolling cooperation design of the roller and the arc groove, combined with the structure of the horizontal surface and vertical chamfer at the top of the roller, enables the sheet metal parts to form rolling contact with the roller during bending, completely solving the problem of traditional bending dies leaving indentations on the sheet metal surface and ensuring the surface accuracy of the sheet metal parts. In addition, the cooperation of the limiting ring and the limiting groove precisely constrains the sliding trajectory of the roller, improving the consistency of the bending angle, and combining multiple advantages such as buffer protection, mark-free processing and high bending accuracy. Attached Figure Description

[0020] Figure 1 It is the isometric drawing in Embodiment 1 of this application;

[0021] Figure 2 This is an exploded view of Embodiment 1 of this application;

[0022] Figure 3 This is a structural diagram of the rotating roller in Embodiment 1 of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Fixed plate; 11. Mounting foot; 2. Movable seat; 21. Arc groove; 22. Limiting groove; 23. Groove; 3. Slide rod; 31. Limiting piece; 4. Spring 1; 5. Spring 2; 6. Rotating roller; 61. Limiting ring; 62. Chamfer. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Figure 3 This application will be described in further detail.

[0025] Example 1:

[0026] A buffer-type, non-marking bending precision mold, as shown in the reference. Figure 1 - Figure 3It includes a fixed plate 1, a movable seat 2, a slide bar 3, a spring 1 4, a spring 2 5, and a rotating roller 6.

[0027] The fixing plate 1 is a horizontally arranged long strip-shaped structure, the length of which is adapted to the width of the sheet metal part to be processed. The fixing plate 1 has symmetrical mounting feet 11 at both ends. The mounting feet 11 and the fixing plate 1 are integrally formed, and each mounting foot 11 has a circular fixing hole. The fixing plate 1 can be stably fixed to the worktable of the external processing equipment by bolts passing through the fixing holes.

[0028] The movable seat 2 is positioned directly above the fixed plate 1, with the two arranged in parallel. At least four slide rods 3 are evenly fixed along the length of the lower surface of the movable seat 2. Each slide rod 3 is cylindrical, with its bottom end penetrating the fixed plate 1 and extending below it. A limiting piece 31 is fixed to the bottom end of each slide rod 3. A spring 4 is slidably mounted on the slide rod 3 below the fixed plate 1, with its top end fixed to the lower surface of the fixed plate 1 and its bottom end fixed to the upper surface of the limiting piece 31. A spring 5 is slidably mounted on the slide rod 3 above the fixed plate 1, with its top end fixed to the lower surface of the movable seat 2 and its bottom end fixed to the upper surface of the fixed plate 1. The elastic coefficient of spring 4 is greater than that of spring 5, thus creating a gradient buffering effect when the movable seat 2 moves.

[0029] The top of the movable seat 2 has two symmetrical arc grooves 21, which are distributed in a "V" shape. The intersection of the two arc grooves has a downwardly recessed groove 23. The inner wall of each arc groove 21 has a limiting groove 22 that extends along the arc groove 21. A rotating roller 6 is slidably embedded in each arc groove 21. The outer wall curvature of the rotating roller 6 matches the inner wall curvature of the arc groove 21. A limiting ring 61 that matches the limiting groove 22 is fixed on the outer wall of the rotating roller 6. The limiting ring 61 is embedded in the limiting groove 22 and can slide along the limiting groove 22 to limit the sliding trajectory of the rotating roller 6. The top of the rotating roller 6 is horizontal, and the side is provided with a vertical chamfer 62. The inclination angle of the chamfer 62 is 45°, and the chamfer 62 is located on the side of the rotating roller 6 closest to the groove 23.

[0030] During the actual bending operation, the external drive structure pushes the movable seat 2 downward. At this time, spring 4 and spring 5 are compressed synchronously, and the elastic deformation is used to achieve buffering. After the movable seat 2 is moved to the preset position, the external stamping structure pushes the sheet metal part downward. The sheet metal part first contacts the top horizontal surface of the roller 6. As the stamping force increases, the sheet metal part drives the roller 6 to slide along the arc groove 21. During this process, the vertical chamfer 62 of the roller 6 contacts the sheet metal part and completes the bending of the sheet metal part in conjunction with the trajectory of the arc groove 21. At the same time, because the roller 6 and the sheet metal part are in rolling contact, the indentation on the surface of the sheet metal part is effectively avoided, and the bending without marks is achieved.

[0031] The foregoing description, with reference to preferred embodiments, illustrates an exemplary implementation of a buffer-type non-marking bending precision mold provided by this disclosure. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, the protection scope of which is determined by the appended claims.

Claims

1. A buffer-type, non-marking bending precision mold, characterized in that, include: A fixing plate (1) is provided on both sides of the fixing plate (1) for fixing to the outside. The movable seat (2) is positioned above the fixed plate (1); Several sliding rods (3) are evenly distributed below the movable seat (2) and pass through the fixed plate (1); Spring 1 (4) is slidably mounted on the slide rod (3) on the lower side of the fixed plate (1), and its two ends are respectively fixed to the limiting piece (31) at the bottom end of the slide rod (3) and the fixed plate (1); Spring 2 (5) is slidably mounted on the slide rod (3) on the upper side of the fixed plate (1); The rotating roller (6) is slidably embedded in the arc groove (21) at the top of the movable seat (2). The top of the rotating roller (6) is a horizontal surface, and the side is provided with a vertical chamfer (62). The outer wall is provided with a limiting ring (61) that cooperates with the limiting groove (22) inside the arc groove (21). The movable seat (2) has symmetrical arc grooves (21) on its top, and a downward groove (23) is provided at the intersection of the two arc grooves (21).

2. The buffer-type seamless bending precision die according to claim 1, characterized in that: The mounting feet (11) are symmetrically distributed at both ends of the fixing plate (1), and fixing holes are provided on the mounting feet (11).

3. The buffer-type seamless bending precision mold according to claim 1, characterized in that: The number of slide bars (3) is at least 4, and they are evenly arranged along the length of the movable seat (2).

4. The buffer-type seamless bending precision die according to claim 1, characterized in that: The curvature of the groove (21) is adapted to the curvature of the outer wall of the roller (6), and the roller (6) can slide along the extension direction of the groove (21).

5. The buffer-type seamless bending precision die according to claim 1, characterized in that: The limiting ring (61) of the rotating roller (6) is embedded in the limiting groove (22), and the thickness of the limiting ring (61) is not greater than the depth of the limiting groove (22).

6. The buffer-type seamless bending precision die according to claim 1, characterized in that: The vertical chamfer (62) of the rotating roller (6) is located on the side of the rotating roller (6) near the groove (23), and the inclination angle of the chamfer (62) is 30°-60°.

7. The buffer-type seamless bending precision die according to claim 1, characterized in that: Both spring 1 (4) and spring 2 (5) are compression springs, and the elastic coefficient of spring 1 (4) is greater than that of spring 2 (5).

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