Straight-up and straight-down quick clamping device of upper die for bending machine

Abstract

The utility model discloses an upper die straight-up and straight-down rapid clamping device for a bending machine, which comprises an upper die body and an upper die holder, and further comprises a driving piece, a clamping piece and a clamping piece, the movable plate is installed on the front side of the upper die base and fixedly connected with the movable end of the driving piece, an obliquely-downward T-shaped hole is formed in the side, back to the upper die base, of the movable plate, and a limiting pin is installed in the T-shaped hole; the pressing and clamping piece is connected with the limiting pin and located between the movable plate and the upper die base, the side, close to the upper die base, of the pressing and clamping piece is provided with a concave pressing and clamping area, the top of the pressing and clamping area is provided with a restraining body, and the pressing and clamping area is used for pressing the upper die body on the upper die base and restraining the upper die body from falling off in the non-pressing state. The device can complete straight-up and straight-down quick assembly and disassembly, and is compact in structure, small in size, low in cost and easy to maintain, disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to a quick clamping device for an upper mold of a bending machine, in particular to a quick clamping device for an upper mold of a bending machine which can be directly mounted up or down. Background Art

[0002] The clamping device of the upper die of the bending machine is widely used in various types of bending machines. It is a connecting device between the bending machine and the bending die. It is installed on the bending machine to clamp the bending upper die. The bending upper die is installed between the connecting plate and the upper die connecting plate. Usually, there are a certain number of clamping devices on each bending machine. Each clamping device is fastened by screws. In this way, when installing or replacing the upper die, dozens of screws need to be loosened and tightened, which is time-consuming and labor-intensive and requires a special wrench, which is very inconvenient. In addition, by loosening and tightening the screws and clamping the bending upper die with the connecting plate and the pressure plate, the clamping force of the pressure plate will be uneven, which will cause the center of the bending upper die to be inconsistent and affect the quality of the bent product.

[0003] After searching the existing CN102626753A, a clamping device for the upper die of a bending machine is disclosed, which includes a clamping body connected to the bending machine at the upper part and the upper die of the bending die at the lower part. A clamping block for clamping the upper die of the bending die is provided inside the clamping body, the lower end of the clamping block is elastically connected to the clamping body through a spring pin, and the upper end of the clamping block is connected to a hydraulic pipeline system for providing clamping power.

[0004] The above patented technology, at the beginning of work, the ejector pin placed in the clamping block pre-presses the hook groove of the bending upper die to prevent the upper die from falling off. Turn on the external hydraulic pump, the hydraulic oil enters the pressure hose through the oil inlet valve, the oil inlet hole of the rear left end cover plate, and the middle through hole of the oil pipe clamping wedge block. The pressure hose is instantly pressurized and expanded, the pressure oil pipe squeezes the clamping block, and the clamping block instantly clamps the bending upper die. The bending upper die is clamped quickly and automatically. Conversely, the external hydraulic pump releases pressure, the reset spring placed in the clamping block pushes the clamping block, the clamping block squeezes the pressure hose, the hydraulic oil in the pressure oil pipe squeezes out the pressure hose to restore the flat state, and the clamping block and the bending upper die are released.

[0005] Although this technology introduces the use of a spring ejector pin to pre-press the upper die hook slot to prevent the tool from falling off, it is not applicable to some scenarios where the lateral installation and disassembly space is limited. At the same time, the entire device is located on one side of the clamp, which causes uneven force on the mold and poor stability. Summary of the invention

[0006] In order to solve the above technical problems, the inventors have obtained the technical solution of the utility model through practice and summary. The utility model adopts the following technical solution:

[0007] A quick clamping device for an upper mold for a bending machine, comprising an upper mold body and an upper mold base, and also comprising:

[0008] A driving member, the driving member is installed on the rear side of the upper die seat;

[0009] A movable plate is installed on the front side of the upper die seat and is connected and fixed to the movable end of the driving member. A T-shaped hole obliquely downward is provided on the side of the movable plate facing away from the upper die seat, and a limiting pin is installed inside.

[0010] The clamping piece is connected to the limit pin and is located between the movable plate and the upper die seat. A concave clamping area is provided on the side of the clamping piece close to the upper die seat, and a constraint body is provided on the top. The clamping piece in the clamping area is used to clamp the upper die body on the upper die seat in a clamped state and to prevent the upper die body from falling off when the clamping state is released. The constraint body is used to assist the upper die body to separate vertically from the clamping piece.

[0011] Preferably, the driving member is a pneumatic cylinder, an oil cylinder or a servo electric cylinder.

[0012] Preferably, the movable plate is provided with a connecting hole 1 and a connecting hole 2, the connecting hole 1 is used to connect the movable end of the mounting drive member, and a guide rod is installed in the connecting hole 2 and the guide rod is fixed on the upper mold base.

[0013] Preferably, a guiding inclined surface is provided on the movable plate, and when the limiting pin moves relative to the T-shaped hole, the clamping member moves along the guiding inclined surface.

[0014] Preferably, a pressing surface is provided on the movable plate, and when the pressing clamp presses the upper mold body, the pressing surface is pressed against the pressing clamp.

[0015] Preferably, the included angles between the guide slope, the T-shaped hole and the horizontal plane are all 10-89°.

[0016] Preferably, the included angles between the guide slope, the T-shaped hole and the horizontal plane are all 30-60°.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model adopts a drive member and a movable plate located on both sides of the upper die base, optimizing the front and rear structural layout on the upper die base, which can better utilize the space and make the entire fixture system more compact. At the same time, it provides a larger operating space to facilitate the installation, adjustment and replacement of the mold. This layout makes operation and maintenance more convenient and improves work efficiency. The drive member can be used as a universal part or standard part of the same type of clamping structure. In this way, when replacing the same type of clamping structure with different specifications, there is no need to replace the drive member on the rear side, reducing the workload. It can also share the clamping force more evenly to ensure that the upper mold is balanced during the clamping process. This balanced distribution reduces the deformation or displacement of the mold due to uneven force, thereby improving the stability and accuracy of the processing.

[0019] 2. The utility model can also separate the clamping piece and the upper mold body through the constraint body. The constraint body will be acted upon by the top of the upper mold body and move upward together. Since the limiting pin constrains the clamping piece to move along the guide slope along the T-shaped hole, it will move horizontally relative to the upper mold body at the same time. The upper mold body and the clamping piece are separated, and after continuing to move upward for a short distance, the upper mold body is quickly pulled down to complete the straight-up and straight-down disassembly and assembly of the upper mold body.

[0020] 3. The concave clamping area of ​​the utility model can constrain the upper mold body in a non-clamped state to prevent it from falling.

[0021] 4. The limit pin of the utility model can constrain the movement direction of the clamping piece and can also limit the freedom of the clamping piece along the left and right directions of the upper die seat.

[0022] 5. The utility model can also add a plurality of continuously arranged step structures on the guide slope, which can ensure the structural strength and reduce the thickness and volume of the moving plate while ensuring the stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a structural diagram of the clamping member of the utility model;

[0025] Figure 3 It is a structural diagram of the movable plate of the utility model;

[0026] Figure 4 This is a diagram of the disassembly process of the upper mold body of the utility model. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] Embodiment 1, a quick clamping device for an upper mold for a bending machine, comprising an upper mold base 2 and an upper mold body 3, and also comprising:

[0030] A driving member 1 is installed at the rear side of the upper die base 2. The driving member 1 is a cylinder, an oil cylinder or a servo electric cylinder, preferably a cylinder, and the output end of the cylinder adopts two piston rods;

[0031] The movable plate 4 is installed on the front side of the upper die seat 2 and is connected and fixed with the movable end of the driving member 1. A T-shaped hole obliquely downward is provided on the side of the movable plate 4 facing away from the upper die seat 2, and a limit pin 5 is installed inside; the movable plate 4 is provided with a connecting hole 1 7 and a connecting hole 2 8. The connecting hole 1 7 is used to connect and install the movable end of the driving member 1. A guide rod 10 is installed in the connecting hole 2 8 and the guide rod 10 is fixed on the upper die seat 2. The guide rod 10 is used for the horizontal movement of the movable plate 4. Two groups of guide rods are used. The angles between the guide inclined surface 9, the T-shaped hole and the horizontal plane are all 10-89°, preferably 30-60°, specifically 45°, and the vertical displacement is equal to the lateral displacement.

[0032] The clamping piece 6 is connected to the limiting pin 5 and is located between the movable plate 4 and the upper die base 2. A concave clamping area 62 is provided on the side of the clamping piece 6 close to the upper die base 2, and a constraint body 61 is provided on the top of the clamping piece 6. The clamping piece 6 in the clamping area 62 is used to clamp the upper die body 3 on the upper die base 1 in a clamped state and to prevent the upper die body 3 from falling off when the clamping state is released. The constraint body 61 is used to assist the upper die body 3 to separate vertically from the clamping piece 6.

[0033] When in use, the upper mold body 3 is inserted from the bottom to the top between the upper mold base 2 and the movable plate 4. When it moves upward to the clamping area 62 of the clamping member 6 and enters the groove of the upper mold body 3, the upper mold body 3 is released and will not fall. Then the driving member 1 drives the movable plate 4 to approach the upper mold base 3, and the clamping member 6 will drive the upper mold body 3 upward until the upper mold body 3 is pressed tightly on the upper mold base 2. After pressing, the top rear side wall and the top rear upper surface of the upper mold body 3 are pressed tightly on the upper mold body 3; when replacing, the driving member 1 drives the movable plate 4 away from the upper mold base 2, and the clamping member 6 descends along the guide slope 9 under the action of gravity to the initial position, and then the upper mold body 3 is moved upward, thereby driving the constraint body 61 upward. During the process, the constraint body 61 will gradually move away from the upper mold body 3. When the clamping area 62 is completely separated from the upper mold body 3, the upper mold body 3 is quickly pulled down to complete the straight up and down separation operation. Alternatively, the upper mold body and the clamping member may be moved upwardly at an angle to a certain height, the upper mold body may be moved close to the upper mold base until the clamping area is separated from the notch, and then the upper mold body may be quickly pulled down to complete the separation operation.

[0034] Embodiment 2, based on the above embodiment, the following improvements are made: in order to balance the stable operation of the clamping member 6, a guide slope 9 is provided on the movable plate 4, and when the limit pin 5 moves relative to the T-shaped hole, the clamping member 6 moves along the guide slope 9. A pressing surface 11 is provided on the movable plate 4, and when the clamping member 6 presses the upper mold body 3, the pressing surface 11 presses on the clamping member 6.

[0035] A plurality of continuous step structures 91 can be provided on the guide slope 9, and a structure can be provided on the clamping member 6 for complete adaptation, thereby ensuring structural strength and reducing the thickness and volume of the movable plate while ensuring the stroke.

[0036] A limiting boss 92 can be set on the guide slope 9, and a structure can be set on the clamp 6 for complete adaptation to reduce the impact force of the limiting pin 5 after the clamp 6 descends to the lowest point. A spring 51 can also be installed on the outside of the limiting pin 5 to further reduce the impact.

[0037] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. The replacement can be a replacement of part of the structure, device, method step, or a complete technical solution. After the clamp is fixed to the upper mold body, the top rear side wall and the top rear upper surface of the upper mold body are pressed on the upper mold base. Equivalent replacements or changes based on the technical solution of the utility model and its inventive concept should be covered within the protection scope of the utility model.

Claims

1. A quick clamping device for the upper mold of a bending machine, characterized in that: include: A driving member, the driving member is installed on the rear side of the upper die seat; A movable plate is installed on the front side of the upper die seat and is connected and fixed to the movable end of the driving member. A T-shaped hole obliquely downward is provided on the side of the movable plate facing away from the upper die seat, and a limiting pin is installed inside. The clamping piece is connected to the limit pin and is located between the movable plate and the upper die seat. A concave clamping area is provided on the side of the clamping piece close to the upper die seat, and a constraint body is provided on the top. The clamping piece in the clamping area is used to clamp the upper die body on the upper die seat in a clamped state and to prevent the upper die body from falling off when the clamping state is released. The constraint body is used to assist the upper die body to separate vertically from the clamping piece.

2. The upper mold straight up and down quick clamping device for a bending machine according to claim 1 is characterized in that: The driving member is a pneumatic cylinder, an oil cylinder or a servo electric cylinder.

3. The upper mold straight up and down quick clamping device for a bending machine according to claim 1 is characterized in that: The movable plate is provided with a connecting hole 1 and a connecting hole 2, wherein the connecting hole 1 is used for connecting the movable end of the mounting driving member, and a guide rod is installed in the connecting hole 2 and is fixed on the upper die seat.

4. The upper mold straight up and down quick clamping device for a bending machine according to claim 1 is characterized in that: The movable plate is provided with a guide inclined surface, and when the limiting column pin moves relative to the T-shaped hole, the clamping piece moves along the guide inclined surface.

5. The upper mold straight up and down quick clamping device for a bending machine according to claim 1 is characterized in that: The movable plate is provided with a pressing surface, and when the pressing clamp presses the upper mold body, the pressing surface presses on the pressing clamp.

6. The upper mold straight up and down quick clamping device for a bending machine according to claim 4 is characterized in that: The included angles between the guide slope, the T-shaped hole and the horizontal plane are all 10-89°.

7. The upper mold straight up and down quick clamping device for a bending machine according to claim 6 is characterized in that: The included angles between the guide inclined surface, the T-shaped hole and the horizontal plane are all 30-60°.

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