Self-positioning type bending forming machine

Abstract

The utility model relates to the field of bending forming, and discloses a self-positioning type bending forming machine which comprises a lower die base, and an upper die base is arranged in the direction right opposite to the lower die base. A positioning cavity is formed in the upper die base, bending grooves are formed in the two sides of the bottom in the positioning cavity, and a supporting part for placing a workpiece is formed in the bottom wall, away from the bending grooves, in the positioning cavity. An elastic ejection piece is arranged in the supporting part, positioning bolts are arranged on the inner walls of the two opposite sides in the positioning cavity, and when the lower die base presses the workpiece downwards, the positioning bolts are ejected outwards to position the side edge of the workpiece. According to the bending die, the upper die base is used for pressing a workpiece downwards to enable the elastic ejection piece to be compressed, meanwhile, the positioning bolt is ejected out to position the workpiece, then the bending action is completed, the upper die base makes contact with pressure on the workpiece in the resetting process, and the workpiece is ejected out under the action of the elastic ejection piece; and subsequent positioning, bending and ejection actions can be realized only by putting a workpiece into the positioning cavity, the steps are continuous and are sequentially and automatically finished, and the bending efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bending and forming, specifically to a self-positioning bending and forming machine. Background Technology

[0002] Bending sheet metal requires applying pressure to the material using a die mounted on a press to cause deformation. Traditional bending dies often require multiple dies to apply pressure multiple times when dealing with sheet metal that needs to be bent multiple times. For small-scale parts production, this bending method requires designing multiple dies, which consumes a lot of time and results in high production costs.

[0003] To improve production efficiency and reduce production costs, the commonly used method is the double-bending forming die, which directly bends both ends of the sheet material simultaneously when the die is pressed down, reducing the number of bending operations.

[0004] Existing double bending forming machines have a positioning structure and an ejection structure. During operation, the workpiece is first fixed on the lower mold by the positioning structure, then the mold is closed for bending, and then the ejection structure is activated to eject the bent workpiece. The entire bending process is independent of each other and requires separate operation, resulting in a long bending cycle and low bending efficiency. Utility Model Content

[0005] Therefore, this utility model provides a self-positioning bending forming machine, which effectively solves the technical problems in the prior art where the bending process steps are independent of each other and need to be operated separately, the workpiece bending cycle is long, and the bending efficiency is low.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a self-positioning bending forming machine, including a lower die base, and an upper die base is arranged in the direction directly opposite to the lower die base;

[0007] A positioning cavity is formed inside the upper mold base. Bending grooves are provided on both sides of the bottom of the positioning cavity. A support part for placing the workpiece is formed on the bottom wall of the positioning cavity away from the bending groove.

[0008] The support portion is provided with an elastic ejector, which extends out of the support portion and supports the workpiece.

[0009] Positioning bolts are provided on the inner walls of opposite sides of the positioning cavity. The lower mold base presses down on the workpiece, compressing the elastic ejector. At the same time, the positioning bolts push outward to position the side of the workpiece. When the upper mold base resets and releases the pressure on the workpiece, the elastic ejector resets and ejects the workpiece.

[0010] Furthermore, two sides of the workpiece placed in the positioning cavity are fitted with the inner wall of the positioning cavity, while the other two sides are away from the inner wall of the positioning cavity and are directly opposite the positioning bolt.

[0011] Furthermore, a top-out groove is provided inside the support section;

[0012] The elastic ejector includes a top plate mounted in the ejection slot via a shaft and a top rod supported at the bottom of the top plate;

[0013] The upper mold base is provided with a first sliding groove, the ejector rod is slidably installed in the first sliding groove, and a first spring is wound around the ejector rod. One end of the first spring is connected to the outer wall of the ejector rod, and the other end is connected to the bottom of the ejector groove.

[0014] Furthermore, the upper mold base is provided with a second slide groove, a third slide groove, and a fourth slide groove in sequence. The first slide groove, the second slide groove, the third slide groove, and the fourth slide groove are connected in sequence. A first slide rod is slidably arranged in the second slide groove, a second slide rod is slidably arranged in the third slide groove, and the positioning bolt is slidably arranged in the fourth slide groove.

[0015] The end of the first slide groove extends beyond the second slide groove, the end of the second slide groove extends beyond the third slide groove, and the end of the third slide groove extends beyond the fourth slide groove;

[0016] The top rod, the first sliding rod, the second sliding rod, and the end of the positioning bolt are all provided with inclined surfaces. The top rod and the end of the first sliding rod, the end of the first sliding rod and the end of the second sliding rod, and the end of the second sliding rod and the end of the positioning bolt are all slidably connected through the inclined surfaces, so that the downward pressing of the top rod drives the first sliding rod to move through the inclined surfaces, the movement of the first sliding rod drives the movement of the second sliding rod through the inclined surfaces, and the movement of the second sliding rod drives the positioning bolt to be pushed outward through the inclined surfaces.

[0017] Furthermore, a second spring is provided between the positioning bolt and the inner wall of the positioning cavity.

[0018] Furthermore, a worktable is installed at the bottom of the lower mold base, an mounting frame is installed on the worktable, a hydraulic cylinder is installed on the mounting frame, and the drive end of the hydraulic cylinder is connected to the upper mold base.

[0019] Furthermore, the upper mold base includes a main pressure mold and a side pressure mold, the main pressure mold and the side pressure mold are respectively connected to different hydraulic cylinders, the main pressure mold faces the bending groove, and the side pressure mold faces the support part.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] In this invention, the workpiece is placed on the elastic ejector, and the upper die presses down on the workpiece to compress the elastic ejector. At the same time, the positioning bolt ejects to position the workpiece. After that, the bending action is completed. During the resetting process of the upper die, the pressure on the workpiece is contacted, and the workpiece is ejected under the action of the elastic ejector. The subsequent positioning, bending and ejection actions can be automatically realized simply by placing the workpiece into the positioning cavity. The steps are continuous and automatically completed in sequence, which improves the bending efficiency. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of a self-positioning bending forming machine provided in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the upper mold base and lower mold base in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the lower mold base in an embodiment of this utility model;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure without any workpieces placed inside;

[0027] Figure 5 for Figure 4 A top-view structural diagram;

[0028] Figure 6 for Figure 5 A planar sectional view along the AA direction.

[0029] The labels in the diagram represent the following:

[0030] 1. Lower mold base; 2. Upper mold base; 3. Positioning cavity; 4. Bending groove; 5. Support part; 6. Elastic ejector; 7. Workpiece; 8. Positioning bolt; 9. Ejection groove; 10. Second slide rail; 11. Third slide rail; 12. Fourth slide rail; 13. First slide rod; 14. Second slide rod; 15. Inclined surface; 16. Second spring; 17. Worktable; 18. Mounting bracket; 19. Hydraulic cylinder;

[0031] 21. Main die; 22. Side die;

[0032] 61. Top plate; 62. Top rod; 63. First slide groove; 64. First spring. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a self-positioning bending forming machine, including a lower die base 1, an upper die base 2 arranged in the direction directly opposite the lower die base 1, a worktable 17 installed at the bottom of the lower die base 1, a mounting frame 18 installed on the worktable 17, and a hydraulic cylinder 19 arranged on the mounting frame 18. The driving end of the hydraulic cylinder 19 is connected to the upper die base 2.

[0035] The lower mold base 1 remains fixed, while the hydraulic cylinder 19 drives the upper mold base 2 to rise and fall, thereby achieving mold closing with the lower mold base 1.

[0036] A positioning cavity 3 is formed inside the upper mold base 2. Bending grooves 4 are provided on both sides of the bottom of the positioning cavity 3. A support part 5 for placing the workpiece 7 is formed on the bottom wall of the positioning cavity 3 away from the bending groove 4. The workpiece 7 is placed above the support part 5. The part of the workpiece 7 to be bent is directly above the bending groove 4. When the part of the workpiece 7 to be bent is pressed down, the part of the workpiece 7 to be bent will gradually bend from a horizontal state to a vertical state.

[0037] An elastic ejector 6 is provided inside the support part 5. The elastic ejector 6 extends out of the support part 5 and supports the workpiece 7. Without external force, the workpiece 7 is placed on the elastic ejector 6 and does not come into contact with the support part 5.

[0038] Positioning bolts 8 are provided on the inner walls of opposite sides of the positioning cavity 3. When the lower mold base 1 presses down on the workpiece 7, the elastic ejector 6 is compressed. At the same time, the positioning bolts 8 push outward to position the side of the workpiece 7. When the upper mold base 2 resets and releases the pressure on the workpiece 7, the elastic ejector resets and ejects the workpiece 7.

[0039] In this invention, the workpiece 7 is placed on the elastic ejector 6, and the upper die base 2 presses down on the workpiece 7 to compress the elastic ejector 6. At the same time, the positioning bolt 8 ejects to position the workpiece 7. After that, the bending action is completed. During the resetting process, the upper die base 2 contacts the pressure on the workpiece 7 and ejects the workpiece 7 under the action of the elastic ejector. The subsequent positioning, bending and ejection actions can be realized simply by placing the workpiece 7 into the positioning cavity 3. The steps are continuous and automatically completed in sequence, which improves the bending efficiency.

[0040] In this invention, two sides of the workpiece 7 placed in the positioning cavity 3 are fitted with the inner wall of the positioning cavity 3, while the other two sides are far away from the inner wall of the positioning cavity 3 and are directly opposite the positioning bolt 8.

[0041] Assume that workpiece 7 has four sides a, b, c, and d, with a and c facing each other, and b and d facing each other. A and c fit into the inner wall of positioning cavity 3. This is to prevent workpiece 7 from moving along its own length and to ensure the positioning effect of workpiece 7 in its length direction. There is a certain distance between sides b and d and the inner wall of positioning cavity 3, which makes it easy to remove workpiece 7 in the ejected state. The worker can remove workpiece 7 by passing through the gap between side b and the inner wall of positioning cavity 3 and the gap between side d and the inner wall of positioning cavity 3.

[0042] like Figure 4 , Figure 5 and Figure 6 As shown, the support part 5 is provided with an ejection groove 9, and the elastic ejector 6 is provided in the ejection groove 9. Specifically, the elastic ejector 6 includes a top plate 61 installed in the ejection groove 9 by a shaft and a push rod 62 supported at the bottom of the top plate 61.

[0043] The upper mold base 2 is provided with a first slide groove 63. The ejector rod 62 is slidably installed in the first slide groove 63. A first spring 64 is wound around the ejector rod 62. One end of the first spring 64 is connected to the outer wall of the ejector rod 62, and the other end is connected to the bottom of the ejector groove 9.

[0044] During the process of pressing down on the workpiece 7 by the upper mold base 2, the top plate 61 is driven to rotate towards the ejection groove 9 and gradually rotates into the ejection groove 9. The ejector rod 62 moves down under the push of the top plate 61, and the first spring 64 is compressed. When the upper mold base 2 resets and releases the pressure on the workpiece 7, the first spring 64 provides elastic force to the ejector rod 62, causing the top plate 61 to reset, thereby ejecting the workpiece 7.

[0045] In this utility model, during the downward rotation of the top plate 61, the positioning bolt 8 simultaneously positions both sides of the workpiece 7. Specifically, the upper mold base 2 is provided with a second slide groove 10, a third slide groove 11, and a fourth slide groove 12 in sequence. The first slide groove 63, the second slide groove 10, the third slide groove 11, and the fourth slide groove 12 are connected in sequence. A first slide rod 13 is slidably arranged in the second slide groove 10, a second slide rod 14 is slidably arranged in the third slide groove 11, and the positioning bolt 8 is slidably arranged in the fourth slide groove 12.

[0046] The end of the first slide groove 63 extends beyond the second slide groove 10, the end of the second slide groove 10 extends beyond the third slide groove 11, and the end of the third slide groove 11 extends beyond the fourth slide groove 12.

[0047] The top rod 62, the first slide rod 13, the second slide rod 14, and the positioning bolt 8 are all provided with inclined surfaces 15. The top rod 62 and the first slide rod 13, the first slide rod 13 and the second slide rod 14, and the second slide rod 14 and the positioning bolt 8 are all slidably connected through the inclined surfaces 15, so that the top rod 62 presses down and drives the first slide rod 13 to move through the inclined surfaces 15, the first slide rod 13 moves and drives the second slide rod 14 to move through the inclined surfaces 15, and the second slide rod 14 moves and drives the positioning bolt 8 to push outward through the inclined surfaces 15.

[0048] During the downward movement of the push rod 62 under force, the downward movement of the push rod 62 drives the first slide rod 13 to move horizontally through the inclined plane 15. The movement of the first slide rod 13 drives the second slide rod 14 to move upward through the inclined plane 15. The movement of the second slide rod 14 drives the positioning bolt 8 to be pushed outward through the inclined plane 15.

[0049] The first slide bar 13, the second slide bar 14, and the positioning bolt 8 are all repositionable structures. To this end, a second spring 16 is provided between the positioning bolt 8 and the inner wall of the positioning cavity 3.

[0050] As the positioning bolt 8 is pushed outward, the second spring 16 deforms.

[0051] When the push rod 62 is not subjected to downward pressure and moves upward due to the elastic force of the first spring 64, the second spring 16 generates an elastic force on the positioning bolt 8, causing the positioning bolt 8 to move inward. The inward movement of the positioning bolt 8 drives the second slide rod 14 to move downward through the inclined plane 15. The downward movement of the second slide rod 14 drives the first slide rod 13 to move horizontally. Throughout the process, the inclined planes 15 are in close contact with each other.

[0052] In this invention, when the workpiece 7 is completely fixed on the support 5, the positioning bolt 8 is positioned precisely on the side wall of the workpiece 7. Then, the upper mold base 2 continues to move downwards to bend both ends of the workpiece 7. The upper mold base 2 mainly adopts the following preferred embodiments, such as... Figure 2 As shown, the upper mold base 2 includes a main pressure mold 21 and a side pressure mold 22. The main pressure mold 21 and the side pressure mold 22 are respectively connected to different hydraulic cylinders 19. The main pressure mold 21 faces the bending groove 4, and the side pressure mold 22 faces the support part 5.

[0053] The main die 21 moves down under the drive of the hydraulic cylinder 19. After moving down to a certain height, the workpiece 7 is fully supported on the support part 5. Then, the other hydraulic cylinders 19 drive the side die 22 to punch and bend the two ends of the workpiece 7. The main die 21, together with the positioning bolt 8, completes the positioning of the workpiece 7, and the side die 22 is used to punch and bend the workpiece 7.

[0054] Before bending, the workpiece 7 is placed on the top plate 61 facing the positioning cavity 3. The main pressure mold 21 moves down under the drive of the hydraulic cylinder 19. During the process of the main pressure mold 21 pressing down on the workpiece 7, it drives the top plate 61 to rotate towards the ejection groove 9 and gradually rotates into the ejection groove 9. The ejector rod 62 moves down under the push of the top plate 61, and the first spring 64 is compressed. During the process of the ejector rod 62 moving down under force, the ejector rod 62 moves down and drives the first slide rod 13 to move horizontally through the inclined plane 15. The movement of the first slide rod 13 drives the second slide rod 14 to move up through the inclined plane 15. The movement of the second slide rod 14 drives the positioning bolt 8 to be ejected outward through the inclined plane 15. After the main pressure mold 21 moves down to a certain height, the workpiece 7 is completely supported on the support part 5. At this time, the positioning bolt 8 is also positioned on the side of the workpiece 7, completing the positioning of the workpiece 7.

[0055] Hydraulic cylinder 19 drives side pressure die 22 to punch and bend both ends of workpiece 7;

[0056] After bending is completed, the side pressure die 22 and the main pressure die 21 are reset in sequence under the drive of the hydraulic cylinder 19. When the main pressure die 21 is reset and releases the pressure on the workpiece 7, the first spring 64 provides elastic force to the push rod 62, causing the top plate 61 to reset, thereby ejecting the workpiece 7. The worker takes out the ejected workpiece 7, completing the bending process of one workpiece 7.

[0057] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A self-positioning bending forming machine, characterized in that, Includes a lower mold base (1), and an upper mold base (2) is provided in the direction directly opposite to the lower mold base (1); The upper mold base (2) has a positioning cavity (3) formed inside. The bottom sides of the positioning cavity (3) are provided with bending grooves (4). The bottom wall of the positioning cavity (3) away from the bending grooves (4) forms a support part (5) for placing the workpiece (7). The support portion (5) is provided with an elastic ejector (6), which extends out of the support portion (5) and supports the workpiece (7). Positioning bolts (8) are provided on the inner walls of opposite sides of the positioning cavity (3). The lower mold base (1) presses down on the workpiece (7) to compress the elastic ejector (6). At the same time, the positioning bolts (8) push outward to position the side of the workpiece (7). When the upper mold base (2) is reset and the pressure on the workpiece (7) is released, the elastic ejector (6) is reset and ejects the workpiece (7).

2. The self-positioning bending forming machine according to claim 1, characterized in that, Two sides of the workpiece (7) placed in the positioning cavity (3) are fitted with the inner wall of the positioning cavity (3), while the other two sides are far away from the inner wall of the positioning cavity (3) and are directly opposite the positioning bolt (8).

3. The self-positioning bending forming machine according to claim 1, characterized in that, The support part (5) is provided with a top groove (9); The elastic ejector (6) includes a top plate (61) mounted on the ejector groove (9) via a shaft and a push rod (62) supported at the bottom of the top plate (61). The upper mold base (2) is provided with a first slide groove (63), the push rod (62) is slidably installed in the first slide groove (63), and a first spring (64) is wound around the outside of the push rod (62). One end of the first spring (64) is connected to the outer wall of the push rod (62), and the other end is connected to the bottom of the ejection groove (9).

4. The self-positioning bending forming machine according to claim 3, characterized in that, The upper mold base (2) is provided with a second slide groove (10), a third slide groove (11), and a fourth slide groove (12) in sequence. The first slide groove (63), the second slide groove (10), the third slide groove (11), and the fourth slide groove (12) are connected in sequence. A first slide rod (13) is slidably arranged in the second slide groove (10), and a second slide rod (14) is slidably arranged in the third slide groove (11). The positioning bolt (8) is slidably arranged in the fourth slide groove (12). The end of the first slide groove (63) extends beyond the second slide groove (10), the end of the second slide groove (10) extends beyond the third slide groove (11), and the end of the third slide groove (11) extends beyond the fourth slide groove (12). The top rod (62), the first slide rod (13), the second slide rod (14), and the positioning bolt (8) are all provided with inclined surfaces (15). The top rod (62) and the end of the first slide rod (13), the end of the first slide rod (13) and the end of the second slide rod (14), and the end of the second slide rod (14) and the end of the positioning bolt (8) are all slidably connected through the inclined surfaces (15), so that when the top rod (62) presses down, it drives the first slide rod (13) to move through the inclined surfaces (15), the first slide rod (13) moves through the inclined surfaces (15), it drives the second slide rod (14) to move through the inclined surfaces (15), and the second slide rod (14) moves through the inclined surfaces (15), it drives the positioning bolt (8) to push outward.

5. The self-positioning bending forming machine according to claim 4, characterized in that, A second spring (16) is provided between the positioning bolt (8) and the inner wall of the positioning cavity (3).

6. The self-positioning bending forming machine according to claim 1, characterized in that, The lower mold base (1) is equipped with a workbench (17) at its bottom. An installation frame (18) is installed on the workbench (17). A hydraulic cylinder (19) is installed on the installation frame (18). The driving end of the hydraulic cylinder (19) is connected to the upper mold base (2).

7. The self-positioning bending forming machine according to claim 6, characterized in that, The upper mold base (2) includes a main pressure mold (21) and a side pressure mold (22). The main pressure mold (21) and the side pressure mold (22) are respectively connected to different hydraulic cylinders (19). The main pressure mold (21) faces the bending groove (4), and the side pressure mold (22) faces the support part (5).

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