U-shaped workpiece bending die

Abstract

The utility model relates to the technical field of workpiece bending, in particular to a U-shaped workpiece bending die which comprises a base and further comprises a lower die, an upper die, a lifting mechanism, a demolding mechanism and a limiting mechanism, the limiting mechanism comprises a rotating assembly, two rotating frames and a plurality of limiting pusher dogs, and the demolding mechanism comprises a top plate and an elastic assembly. The lifting mechanism is installed between the base and the upper die, the limiting poking claw can be used for limiting and poking a workpiece attached to the upper die after being bent, the workpiece attached to the upper die can make contact with the limiting poking claw along with continuous upward movement of the upper die, the workpiece attached to the upper die can be poked down through limitation of the limiting poking claw, and therefore the workpiece can be conveniently and rapidly bent. And through cooperation of the demolding mechanism and the limiting mechanism, the situation that a workpiece in the cavity is bounced off due to the elastic force effect of an elastic assembly during demolding can be effectively prevented, the danger coefficient is reduced, and the situation that the workpiece is damaged due to bouncing off is reduced.

Description

Technical Field

[0001] This utility model relates to the field of workpiece bending technology, specifically a U-shaped workpiece bending die. Background Technology

[0002] Bending dies are tools used by bending machines to shape and process sheet metal. U-shaped workpieces are one of the workpieces that bending machines frequently process. U-shaped workpiece bending dies are divided into upper and lower bending dies. The upper and lower dies can be used to bend the workpiece into a U-shape.

[0003] Existing U-shaped workpiece bending dies typically have a spring block below the lower die. After the U-shaped workpiece is bent, the spring block can push the workpiece out of the lower die. This method has the following drawbacks:

[0004] 1. In actual use, after the U-shaped workpiece is bent, it is easy to stick to the upper mold. The bent U-shaped workpiece is not easy to remove from the upper mold and needs to be manually demolded, which is time-consuming and laborious.

[0005] 2. While the spring block is ejecting the workpiece, the workpiece may pop out of the lower mold, which not only increases the risk factor but also easily damages the workpiece.

[0006] To address the aforementioned issues, a U-shaped workpiece bending die is now provided. Utility Model Content

[0007] The purpose of this invention is to provide a U-shaped workpiece bending die to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A U-shaped workpiece bending die includes a base, a lower die, an upper die, a lifting mechanism, a demolding mechanism, and a limiting mechanism. The lower die is fixedly installed on the top of the base, and the upper die is located above the lower die. The lower die has a cavity that mates with the upper die at the end closest to the upper die.

[0010] The limiting mechanism includes a rotating component, two rotating frames and multiple limiting claws. The two rotating frames are symmetrically arranged on both sides of the lower mold. The end of each rotating frame near the base is rotatably mounted on the base. The multiple limiting claws are respectively installed on the ends of the two rotating frames away from the base. The rotating component is located between the base and the two rotating frames.

[0011] The demolding mechanism includes a top plate and an elastic component. A limiting groove communicating with the cavity is provided at the bottom of the cavity. The top plate is located inside the limiting groove, and the elastic component is installed below the limiting groove.

[0012] The lifting mechanism is used to move the upper mold, and it is installed between the base and the upper mold.

[0013] As a further embodiment of this utility model: the rotating assembly includes a mounting plate, a motor, two rotating shafts, two driving wheels, two driven wheels, two transmission belts, and two gears;

[0014] Two rotating shafts are symmetrically arranged on both sides of the lower mold. Each rotating shaft is rotatably mounted above the base. Both ends of each rotating shaft are connected to the end of a rotating frame away from the limit pawl. Each driven wheel is fixedly mounted on the end of a rotating shaft. The mounting plate is fixedly mounted on the top of the base. Two driving wheels are rotatably mounted on the mounting plate. Each transmission belt is fitted on one driving wheel and one driven wheel.

[0015] Each drive wheel has a gear fixed on the side away from the mounting plate. The two gears mesh with each other. The motor is mounted on the base, and the output end of the motor is connected to one of the gears.

[0016] As a further embodiment of this utility model: the elastic component includes a central cavity, a lifting rod, and multiple springs. The central cavity is located below and communicates with the limiting groove. The lifting rod is slidably disposed inside the central cavity. The top end of the lifting rod is fixedly connected to the top plate. Multiple springs are equidistantly distributed inside the central cavity. Both ends of each spring are connected to the lifting rod and the central cavity, respectively.

[0017] As a further embodiment of this utility model: two fixed seats are symmetrically fixed on the upper two sides of the base, and each rotating shaft is rotatably mounted on a fixed seat through a bearing.

[0018] As a further embodiment of this utility model: a groove is provided on both sides of the cavity, a limiting roller is provided inside each groove, and a support rod is fixedly installed on the lower mold at both ends of each limiting roller, and each limiting roller is rotatably arranged between the two support rods.

[0019] As a further embodiment of this utility model: the lifting mechanism includes an L-shaped frame and an electric push rod. The L-shaped frame is fixedly installed on one side of the top of the base, the upper mold is located below the L-shaped frame, and the electric push rod is fixedly installed on the top of the L-shaped frame. The output end of the electric push rod passes through the L-shaped frame and is fixedly connected to the top of the upper mold.

[0020] As a further embodiment of this utility model: two guide rods are slidably provided above the L-shaped frame, the two guide rods are symmetrically arranged on both sides of the electric push rod, and the end of each guide rod near the upper mold is fixedly connected to the upper mold.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model discloses a U-shaped workpiece bending die. By setting a limiting mechanism, when the upper die moves upward after the workpiece is bent, multiple limiting claws on both sides are rotated to the top of the workpiece. The limiting claws can limit and move the workpiece attached to the upper die after bending. As the upper die continues to move upward, the workpiece attached to the upper die can contact the limiting claws. The limiting claws can remove the workpiece attached to the upper die, which facilitates demolding.

[0023] 2. The U-shaped workpiece bending die of this utility model has an elastic component. When the upper die moves upward after the workpiece is bent, the elastic component can drive the top plate to move upward, pushing the workpiece out of the cavity. This effectively prevents the workpiece from getting stuck inside the cavity and making demolding difficult.

[0024] 3. The U-shaped workpiece bending die of this utility model, through the cooperation of the demolding mechanism and the limiting mechanism, and by using the limiting claw, can effectively prevent the workpiece inside the cavity from being ejected during demolding due to the elastic force of the elastic component, thereby reducing the risk factor and minimizing the damage to the workpiece caused by ejection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the workpiece in its unbent state according to this utility model.

[0026] Figure 2 This utility model Figure 1 A magnified structural diagram of part A in the middle.

[0027] Figure 3 This is a structural diagram of the workpiece in the completed bending state in this utility model.

[0028] Figure 4 This utility model Figure 3 A magnified structural diagram of part B.

[0029] Figure 5 This is a side view of the workpiece in the completed bending state according to this utility model.

[0030] Figure 6 This utility model Figure 5 A magnified structural diagram of section C.

[0031] The components are as follows: 11. Base; 12. Lower mold; 13. Upper mold; 14. Cavity; 15. Groove; 16. Limiting roller; 17. Support rod; 18. Limiting groove; 19. Center cavity; 20. Lifting rod; 21. Top plate; 22. Spring; 23. L-shaped frame; 24. Electric push rod; 25. Guide rod; 26. Limiting claw; 27. Rotating frame; 28. Fixed seat; 29. ​​Rotating shaft; 30. Driving wheel; 31. Driven wheel; 32. Transmission belt; 33. Mounting plate; 34. Gear; 35. Motor. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0033] The present invention provides the following preferred embodiments:

[0034] Example 1, as Figures 1-6 As shown, a U-shaped workpiece bending die includes a base 11, a lower die 12, an upper die 13, a lifting mechanism, a demolding mechanism, and a limiting mechanism. The lower die 12 is fixedly installed on the top of the base 11, and the upper die 13 is located above the lower die 12. The lower die 12 has a cavity 14 that mates with the upper die 13 at one end near the upper die 13. By utilizing the mate between the cavity 14 and the upper die 13, the workpiece can be bent when the upper die 13 moves downward.

[0035] The limiting mechanism includes a rotating component, two rotating frames 27 and multiple limiting claws 26. The two rotating frames 27 are symmetrically arranged on both sides of the lower mold 12. The end of each rotating frame 27 near the base 11 is rotatably mounted on the base 11. The multiple limiting claws 26 are respectively installed on the ends of the two rotating frames 27 away from the base 11. The rotating component is located between the base 11 and the two rotating frames 27.

[0036] The rotating assembly is used to drive the two rotating frames 27 to rotate, so that the limiting claws 26 on the rotating frames 27 can rotate;

[0037] In use, before the workpiece is bent, the rotating frame 27 rotates to a vertical position. After the bending is completed, the rotating component drives the rotating frame 27 to rotate, and rotates the multiple limiting claws 26 on both sides to the top of the workpiece. The limiting claws 26 can limit and move the workpiece attached to the upper mold 13 after bending. As the upper mold 13 continues to move upward, the workpiece attached to the upper mold 13 can contact the limiting claws 26. The limiting claws 26 can pull the workpiece attached to the upper mold 13 off, which can facilitate demolding.

[0038] The demolding mechanism includes a top plate 21 and an elastic component. A limiting groove 18 communicating with the cavity 14 is provided at the bottom end of the cavity 14. The top plate 21 is located inside the limiting groove 18, and the elastic component is installed below the limiting groove 18. The elastic component can drive the top plate 21 to move. Initially, the top plate 21 extends into the cavity 14. When the upper mold 13 moves downward to bend the workpiece, the workpiece moves downward under the action of the upper mold 13, thereby allowing the top plate 21 to move into the limiting groove 18.

[0039] After bending, when the upper mold 13 moves upward, the elastic component can drive the top plate 21 to move out of the limiting groove 18, thereby ejecting the workpiece inside the cavity 14, thus effectively preventing the workpiece from getting stuck inside the cavity 14 and making demolding difficult.

[0040] The lifting mechanism is used to move the upper mold 13. The lifting mechanism is installed between the base 11 and the upper mold 13. The lifting component is used to lift the upper mold 13, which facilitates the subsequent bending of the workpiece.

[0041] like Figures 1-6 As shown, the rotating assembly includes a mounting plate 33, a motor 35, two rotating shafts 29, two driving wheels 30, two driven wheels 31, two transmission belts 32, and two gears 34;

[0042] Two rotating shafts 29 are symmetrically arranged on both sides of the lower mold 12. Each rotating shaft 29 is rotatably arranged above the base 11. Both ends of each rotating shaft 29 are connected to the end of a rotating frame 27 away from the limiting claw 26. Each driven wheel 31 is fixedly installed at the end of a rotating shaft 29. The mounting plate 33 is fixedly installed at the top of the base 11. Two driving wheels 30 are rotatably arranged on the mounting plate 33. Each transmission belt 32 is sleeved on a driving wheel 30 and a driven wheel 31.

[0043] Each drive wheel 30 has a gear 34 fixed on the side away from the mounting plate 33. The two gears 34 mesh with each other. The motor 35 is mounted on the base 11, and the output end of the motor 35 is connected to one of the gears 34.

[0044] When the rotating frame 27 needs to rotate, the control motor 35 is activated. The motor 35 drives the gear 34 connected to the output end of the motor 35 to rotate. Since the two gears 34 mesh with each other, both gears 34 can rotate when the motor 35 is activated, thereby driving the two drive wheels 30 to rotate. Under the action of the transmission belt 32, the drive wheels 30 can drive the driven wheels 31 to rotate, thereby driving the two rotating frames 27 to rotate through the rotating shaft 29. This causes the multiple limiting claws 26 on both sides to rotate above the workpiece. The limiting claws 26 can limit and move the workpiece. As the upper mold 13 continues to move upward, the workpiece attached to the upper mold 13 can contact the limiting claws 26. The limiting claws 26 can then remove the workpiece attached to the upper mold 13.

[0045] like Figures 1-6 As shown, the elastic component includes a central cavity 19, a lifting rod 20, and multiple springs 22. The central cavity 19 is located below and communicates with the limiting groove 18. The lifting rod 20 is slidably disposed inside the central cavity 19. The top end of the lifting rod 20 is fixedly connected to the top plate 21. Multiple springs 22 are equidistantly distributed inside the central cavity 19. Both ends of each spring 22 are connected to the lifting rod 20 and the central cavity 19, respectively.

[0046] In the initial state, the top plate 21 extends out of the limiting groove 18 and into the cavity 14, the lifting rod 20 slides to the top of the center cavity 19, and the spring 22 is in the natural state.

[0047] When the upper die 13 moves down to bend the workpiece, the workpiece moves down under the action of the upper die 13, the top plate 21 moves into the inside of the limiting groove 18, the top plate 21 drives the lifting rod 20 to slide downward inside the central cavity 19, and the spring 22 is compressed.

[0048] After bending, when the upper mold 13 moves upward, the spring 22 can drive the lifting rod 20 to move upward. The lifting rod 20 drives the top plate 21 to move out of the limiting groove 18, thereby ejecting the workpiece inside the cavity 14. This effectively prevents the workpiece from getting stuck inside the cavity 14 and making demolding difficult.

[0049] like Figures 1-6 As shown, two fixed seats 28 are symmetrically fixed on the upper sides of the base 11. Each rotating shaft 29 is rotatably mounted on a fixed seat 28 through a bearing. The fixed seats 28 can support the rotating shaft 29.

[0050] like Figures 1-6 As shown, a groove 15 is provided on both sides of the cavity 14, and a limiting roller 16 is provided inside each groove 15. Each limiting roller 16 has a support rod 17 fixedly installed on the lower mold 12 at both ends, and each limiting roller 16 is rotatably arranged between the two support rods 17.

[0051] By using two rotatable limiting rollers 16, the friction between the workpiece and the rollers can be reduced during bending, thus reducing wear and improving protection of the workpiece during the bending process.

[0052] like Figures 1-6 As shown, the lifting mechanism includes an L-shaped frame 23 and an electric push rod 24. The L-shaped frame 23 is fixedly installed on one side of the top of the base 11, the upper mold 13 is located below the L-shaped frame 23, and the electric push rod 24 is fixedly installed on the top of the L-shaped frame 23. The output end of the electric push rod 24 passes through the L-shaped frame 23 and is fixedly connected to the top of the upper mold 13.

[0053] When the upper die 13 needs to be raised or lowered, the electric push rod 24 is controlled to work. The electric push rod 24 can drive the upper die 13 to move. When the upper die 13 moves downward, it can bend the workpiece.

[0054] like Figures 1-6 As shown, two guide rods 25 are slidably arranged above the L-shaped frame 23. The two guide rods 25 are symmetrically arranged on both sides of the electric push rod 24. The end of each guide rod 25 near the upper mold 13 is fixedly connected to the upper mold 13. The guide rods 25 can guide the upper mold 13 to ensure the accuracy when the upper mold 13 and the lower mold 12 are closed, thereby ensuring the bending accuracy of the workpiece.

[0055] The beneficial effects of this utility model are specifically reflected in the fact that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A U-shaped workpiece bending die comprising a base (11), characterized in that, The mold also comprises a lower mold (12), an upper mold (13), a lifting mechanism, a demolding mechanism and a limiting mechanism, the lower mold (12) is fixedly installed at the top end of the base (11), the upper mold (13) is located above the lower mold (12), and the lower mold (12) is provided with a cavity (14) matched with the upper mold (13) at one end close to the upper mold (13); The limiting mechanism comprises a rotating assembly, two rotating frames (27) and a plurality of limiting pawls (26), the two rotating frames (27) are symmetrically arranged on the two sides of the lower mold (12), each rotating frame (27) is rotatably arranged on the base (11) at one end close to the base (11), and the plurality of limiting pawls (26) are respectively installed at one end of the two rotating frames (27) away from the base (11). The demolding mechanism comprises a top plate (21) and an elastic assembly, the bottom end of the cavity (14) is provided with a limiting groove (18) in communication with the cavity (14), the top plate (21) is located inside the limiting groove (18), and the elastic assembly is installed below the limiting groove (18). The lifting mechanism is used for driving the upper mold (13) to move, and is installed between the base (11) and the upper mold (13).

2. The U-shaped workpiece bending die according to claim 1, wherein The rotating assembly comprises a mounting plate (33), a motor (35), two rotating shafts (29), two driving wheels (30), two driven wheels (31), two transmission belts (32) and two gears (34); The two rotating shafts (29) are symmetrically arranged on the two sides of the lower mold (12), each rotating shaft (29) is rotatably arranged above the base (11), and the two ends of each rotating shaft (29) are connected to one end of a rotating frame (27) away from the limiting pawl (26). Each driving wheel (30) is fixedly provided with a gear (34) on the side away from the mounting plate (33), the two gears (34) are meshed with each other, the motor (35) is installed on the base (11), and the output end of the motor (35) is connected to one of the gears (34).

3. The U-shaped workpiece bending die according to claim 2, wherein The elastic assembly comprises a central cavity (19), a lifting rod (20) and a plurality of springs (22), the central cavity (19) is located below the limiting groove (18) and communicates with the limiting groove (18), the lifting rod (20) is slidably arranged inside the central cavity (19), the top end of the lifting rod (20) is fixedly connected to the top plate (21), and the plurality of springs (22) are equidistantly distributed inside the central cavity (19).

4. The U-shaped workpiece bending die according to claim 3, wherein The two fixed seats (28) are symmetrically fixed on the upper sides of the base (11), and each rotating shaft (29) is rotatably arranged on one fixed seat (28) through a bearing.

5. The U-shaped workpiece bending die according to claim 4, wherein Two sides of the cavity (14) are provided with a groove (15), the inside of each groove (15) is provided with a limiting roller (16), both ends of each limiting roller (16) are provided with a support rod (17) fixedly installed on the lower mold (12), each limiting roller (16) is rotatably arranged between the two support rods (17).

6. The U-shaped workpiece bending die according to claim 5, wherein The lifting mechanism comprises an L-shaped frame (23) and an electric push rod (24), the L-shaped frame (23) is fixedly installed on the top end side of the base (11), the upper mold (13) is located below the L-shaped frame (23), the electric push rod (24) is fixedly installed on the top end of the L-shaped frame (23), and the output end of the electric push rod (24) penetrates through the L-shaped frame (23) and is fixedly connected with the top end of the upper mold (13).

7. The U-shaped workpiece bending die according to claim 6, wherein The top of the L-shaped frame (23) is slidably provided with two guide rods (25), the two guide rods (25) are symmetrically arranged on the two sides of the electric push rod (24), and one end of each guide rod (25) close to the upper mold (13) is fixedly connected with the upper mold (13).

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