A quick dismounting clamping device for bending upper die

Abstract

The application discloses a clamping device for quick dismounting of a bending upper die, which comprises an upper die seat, a hook clamping piece and a side clamping plate. The hook clamping piece is arranged between the side clamping plate and the upper die seat, and the side clamping plate restricts the running track of the hook clamping piece and the two are not separated. When the side clamping plate moves towards the upper die seat, the side clamping plate drives the hook clamping piece to move upwards, and the hook clamping piece drives the upper die tool to move upwards to fix the upper die tool on the upper die seat. When the side clamping plate moves away from the upper die seat, the hook clamping piece and the upper die tool move downwards to the lowest point under the action of gravity. The vertical quick dismounting of the upper die tool can be completed, the structure is compact, the system is small, the cost is low, the stability and reliability are high, and the installation precision and the plate bending precision are ensured.

Description

Technical Field

[0001] This invention relates to quick-assembly technology for upper dies of bending machines, specifically a clamping device for quick assembly and disassembly of upper dies for bending machines. Background Technology

[0002] Existing bending machines typically employ mechanical clamping mechanisms for the upper die clamping system, which is installed between the connecting pressure plate and the upper die connecting plate. Each bending machine usually has a certain number of clamping devices, each secured with screws. This means that installing or replacing the upper die requires tightening or loosening dozens of screws, which is time-consuming, labor-intensive, and requires a special wrench, making operation inconvenient. Furthermore, the uneven clamping force of the pressure plate, resulting from tightening and loosening screws and clamping the upper die, can cause inconsistencies in the center of the upper die, affecting the quality of the bent product.

[0003] Currently, the aforementioned mechanical clamping structure is quite common. For example, CN201610433585.5 discloses a quick mechanical clamping device for the upper die of a bending machine with compensation. It includes an intermediate plate, a rear pressure plate, an adjusting block, a connecting plate, a front pressure plate, and an eccentric shaft handle. The intermediate plate and the adjusting block are in inclined contact and are fixedly connected to the connecting plate. Deflection compensation of the upper die can be achieved by adjusting the position of the adjusting block. The front pressure plate and the intermediate plate are connected by fixing bolts fitted with a spring and a spherical washer. The front pressure plate can rotate along the arc surface of the spherical washer. The front and rear pressure plates are fixedly connected to the intermediate plate. A needle roller bearing is installed on the connecting plate, and an eccentric shaft handle is installed on the front pressure plate. Rubber strips and movable inserts that can be inserted into the square groove of the upper die are installed at corresponding positions on the front and rear pressure plates. The following problem exists: Because the upper die has an installation reference surface (surface A or surface B), such as... Figure 4 As shown, during installation, the operator needs to place the upper mold on the mounting reference surface before clamping can be performed.

[0004] Of course, there are other mechanical clamping mechanisms, which are slightly different in structure but have similar principles, such as patents with patent numbers 201620459476.6 and 201210331803.6. They all have the defects mentioned above, which will not be elaborated here. Summary of the Invention

[0005] The technical problem to be solved by this invention is:

[0006] How to provide a compact structure that can automatically complete the upward mounting of the upper mold body onto the reference surface for quick clamping of the bending upper mold.

[0007] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0008] A quick-assembly and disassembly clamping device for a bending upper die includes an upper die base, as well as hook clamps and side clamps;

[0009] The hook clamp is positioned between the side clamp and the upper mold base. The side clamp constrains the running trajectory of the hook clamp and the two do not separate.

[0010] When the side clamping plate moves towards the upper mold base, the side clamping plate drives the hook clamping piece to move upward, and the hook clamping piece drives the upper mold cutting tool to move upward until it is fixed to the upper mold base, and is in a pressed state.

[0011] When the side clamping plate moves away from the upper mold base, the hook clamping parts and the upper mold cutting tool move down to the lowest point under their own gravity.

[0012] Preferably:

[0013] The hook clamp includes a hook clamp body, which is used to hook the upper die tool to prevent it from falling off in its natural state.

[0014] The top of the hook clamp is integrally connected to a pressure-bearing body, which is located on top of the upper die tool;

[0015] The clamping area between the pressure-bearing body and the hook clamping body forms a limiting area, which is used to restrict the vertical synchronous movement of the upper die cutting tool and the hook clamping part.

[0016] Preferably:

[0017] The bottom of the hook clamp body near the upper mold base is provided with an upwardly sloping wedge-shaped surface.

[0018] Preferably:

[0019] The hook clamp also includes a movable body, on which the opposite side clamps slide relative to each other without disengaging, and the hook clamp is integrally connected to the side of the movable body opposite to the upper mold base.

[0020] Preferably:

[0021] The side clamp is provided with a guide structure, which is used to guide the hook clamp synchronously in the vertical and horizontal directions.

[0022] Preferably:

[0023] The guide structure is opened at an angle upward and is located at the bottom of the side clamping plate near the upper mold base.

[0024] Preferably:

[0025] The guide structure is a groove with an angle of 10-89° to the horizontal plane.

[0026] Preferably:

[0027] The lower surface of the guide structure is provided with multiple steps that are continuously arranged along the depth direction of the guide structure, and the side of the hook clamp facing the guide structure is provided with a step surface that matches the steps.

[0028] Preferably:

[0029] The hook clamp has a downwardly extending boss on its top lower surface;

[0030] The lower surface of the inner wall of the guide structure is provided with an upwardly extending boss.

[0031] The second boss is located above the second boss and is in the same position. Together, they are used to constrain the lowest point of the hook clamp.

[0032] Preferably:

[0033] The side clamp is provided with a limiting member, which is used to constrain the movement direction of the hook clamp relative to the side clamp.

[0034] Preferably:

[0035] The side clamp is provided with a T-shaped mounting hole, and the limiting member is installed in the T-shaped mounting hole and connected and fixed with the hook clamp.

[0036] Preferably:

[0037] The T-shaped mounting hole is located on the side of the side clamp plate opposite to the upper mold base, and the cross-section of the T-shaped lifting hole is larger at the top and smaller at the bottom.

[0038] Preferably:

[0039] The T-shaped mounting hole is angled downwards, and the angle between the T-shaped lifting hole and the horizontal plane is 10-89°.

[0040] Preferably:

[0041] The limiting component includes a limiting pin, which is movably installed in a T-shaped mounting hole and threadedly connected to a hook clamp.

[0042] Preferably:

[0043] The limiting component also includes a spring fitted onto the outside of the limiting pin.

[0044] Preferably:

[0045] The clamping device also includes a driving component, which is used to drive the side clamping plate to selectively move closer to or away from the upper mold base.

[0046] Preferably:

[0047] The side clamping plate is installed on the front side of the upper mold base;

[0048] The drive unit is installed on the rear side of the upper mold base;

[0049] The movable end of the drive component passes through the upper mold base and drives the side clamping plate away from or towards the upper mold base.

[0050] Preferably:

[0051] The upper mold base is provided with a guide rod, which is arranged parallel to the movement direction of the movable end of the drive component, and is used to guide the movement of the side clamping plate when it approaches or moves away from the upper mold base.

[0052] Preferably:

[0053] The driving component is a cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0054] Preferably:

[0055] The clamping device also includes a pressure screw or an operating handle, which is used to move the side clamping plate closer to or away from the upper mold base.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] 1. In this invention, when the driving component moves the side clamping plate close to the upper die base, the side clamping plate constrains the movement trajectory of the hook clamp, causing the hook clamp to move simultaneously up and down and forward and backward relative to the side clamping plate. This completes the lifting of the upper die cutting tool and fixes it onto the upper die base, thus completing its self-mounting onto the mounting reference surface. Under the action of the hook clamp, the top of the upper die cutting tool is tightly pressed against the bottom surface of the upper die base, allowing the force on the upper die cutting tool to be effectively transferred to the upper die base. After the upper die cutting tool is fixed, the rear top of the upper die cutting tool receives a downward force, the rear side of the top receives a forward force, and the front side of the top receives a backward force. Simultaneously, the slot adapted to the hook clamp receives an upward force, resulting in good structural stability for the entire bending upper die and eliminating problems of micro-displacement and torsion during bending. The support point of the upper die cutting tool on the upper die base is located on the lower side of the fixed area. When the side clamping plate moves away from the upper mold base, the upper mold cutting tool and the hook clamping part descend to the lowest point, and the two will not separate. At this time, it is convenient to disassemble and assemble the upper mold cutting tool and the hook clamping part.

[0058] 2. Unlike existing technologies where the clamping block presses the upper die against the inner side wall of the upper die holder, this solution offers higher structural stability and reliability, effectively ensuring installation and bending accuracy. Before clamping, the upper die tool can be installed from bottom to top. Under its own weight, the hook and clamp first move away from the upper die tool, then hook the upper die tool onto the side clamping plate before it approaches the upper die holder to prevent it from falling. When the driving component moves the side clamping plate away from the upper die holder, the upper die tool and the hook and clamp can descend to the lowest point to prevent detachment. The hook and clamp can also move relative to the side clamping plate. When the upper die tool deflects, the hook and clamp will move away from the upper die tool and simultaneously move upward relative to the side clamping plate, completing the separation of the upper die tool and the hook and clamp, thus achieving rapid vertical assembly and disassembly.

[0059] 3. For hook and clamp structures without a pressure-bearing body, during disassembly, the upper die cutting tool is first moved upward a short distance, then the bottom of the hook and clamp is tilted backward and the top is tilted forward, which in turn drives the opposite side clamp of the hook and clamp upward and gradually away from the upper die cutting tool. When it moves away from the upper die cutting tool, it will also move upward relative to the cutting tool until the hook surface of the hook and clamp separates from the cutting tool. After the hook and clamp body and the hook area of ​​the upper die cutting tool are separated, the upper die cutting tool is placed vertically downward. Since the front and back position of the top of the upper die cutting tool remains unchanged, the position of the hook and clamp will not change before the hook and clamp body is completely separated from the hook area. The upper die cutting tool can be quickly separated by placing it vertically downward.

[0060] 4. The hook-and-clamp structure with a pressure-bearing body allows for disassembly. During disassembly, the hook-and-clamp and the upper die cutting tool are moved upwards together for a certain distance, maintaining contact between the upper die cutting tool and the upper die base throughout the upward movement. The hook grooves on the hook-and-clamp and the upper die cutting tool will separate, causing the upper die cutting tool to fall and quickly separate from the upper die base and the hook-and-clamp, enabling a rapid, vertical disassembly of the upper die cutting tool. It is crucial to ensure that the distance between the lowest point of the hook-and-clamp and the position where the upper die cutting tool is fixed to the upper die base is greater than the depth of the hook groove. This ensures that when the pressure-bearing body contacts the upper die base, the hook groove completely separates from the hook groove on the upper die cutting tool, allowing for a vertical disassembly of the upper die cutting tool. The limiting area and the top and side pressure surfaces of the upper die cutting tool are fully in contact.

[0061] 5. In this invention, the side clamping plate can be moved pneumatically, electrically, or hydraulically. Multiple mechanisms can be used on the machine, and the multiple drive components can be connected in series or parallel. They can be operated simultaneously or independently, facilitating the rapid assembly and disassembly of multiple cutting tools. Alternatively, a traditional structure such as a feed screw can be used to move the side clamping plate closer to or away from the upper mold base. Pulling the front side pressure plate back from the back using the drive component reduces the volume of the front structure, making it easier to use. Furthermore, when changing to different mold models and side clamping plates, only the front structure needs to be removed and the hook clamping components replaced. Multiple preset specifications are available for pre-selection, while the rear drive component remains, reducing workload and providing strong versatility.

[0062] 6. The hook clamp used in this invention has a dual function: firstly, it prevents the upper die blade from falling off before and after the clamping action is released; secondly, it fixes the upper die blade on the upper die base, effectively fixing the upper die blade and ensuring the mechanical transmission and torsional resistance during bending, enabling bending of thicker, harder, or larger bending angle plates.

[0063] 7. The present invention uses a side clamping plate close to the upper die base to drive the hook clamping member to lift and press the upper die cutting tool. The pressing surface may include the front side, the rear side, the top side, and the top side of the hook clamping member on the upper die cutting tool corresponding to the hook area, forming a four-sided clamping, which can effectively ensure that the upper die cutting tool receives a uniform clamping force. This clamping structure has higher stability.

[0064] 8. This invention also employs a drive component and pressure plate located on both sides of the upper mold base, optimizing the front-rear structural layout of the upper mold base. This allows for better space utilization, making the entire clamping system more compact and providing greater operating space for easy mold installation, adjustment, and replacement. This layout makes operation and maintenance more convenient and improves work efficiency. The drive component can be used as a universal or standard component for the same type of clamping structure, so when changing clamping structures of different specifications, there is no need to replace the rear drive component, reducing workload. It also distributes the clamping force more evenly, ensuring that the upper mold is under balanced force during clamping. This balanced distribution reduces deformation or displacement of the mold caused by uneven force, thereby improving processing stability and accuracy.

[0065] 9. In this invention, because the hook clamp is provided with a pressure-bearing body, during the upward movement of the upper mold body, due to the weight of the hook clamp itself, if the width of the upper mold is significantly smaller than the width of the slider, when the upper mold body pushes against the pressure-bearing body, if it does not push the hook clamp to the middle position, one end of the hook clamp will be lifted while the other end is lifted to a lower height due to less force. This increases the resistance between the hook clamp and the guide structure, making it prone to jamming. At the same time, the linearity of the movement will be poor, resulting in severe wear. It will also cause a "virtual disassembly" phenomenon where one end of the anti-fall surface detaches from the upper mold body while the other end is still in the groove of the upper mold body, making it impossible to complete the disassembly in one go. Furthermore, because the side clamp has holes for the drive component and guide rod, placing the motion retaining structure on the upper part of the side clamp would result in a limited number of balance points (generally two to three). Therefore, an upward-sloping, oblong hole is designed at the bottom of the side clamp. This allows for the placement of balance points according to actual needs, effectively avoiding the holes for the drive component and guide rod, and significantly increasing the number of balance points. The motion retaining component is installed within the oblong hole to prevent this problem, ensuring smooth sliding and linear movement of the guide structure and hook clamp. Compared to using limit pins and springs, this design also allows for lateral installation. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the overall structure of the present invention after clamping. Figure 1 ;

[0067] Figure 2 This is a schematic diagram of the side clamping plate structure of the present invention;

[0068] Figure 3 This is a schematic diagram of the hook clamp structure of the present invention. Figure 1 ;

[0069] Figure 4 This is a schematic diagram of the upper die cutting tool of the present invention;

[0070] Figure 5 This is a schematic diagram of the overall structure of the present invention during disassembly. Figure 1 ;

[0071] Figure 6 This is a schematic diagram of the overall structure of the present invention after clamping. Figure 2 ;

[0072] Figure 7 This is a schematic diagram of the hook clamp structure of the present invention. Figure 2 ;

[0073] Figure 8 for Figure 6 Overall structure diagram during disassembly Figure 1 ;

[0074] Figure 9 for Figure 6 Overall structure diagram during disassembly Figure 2 ;

[0075] Figure 10 This is a schematic diagram of the overall structure of the side clamp of the present invention;

[0076] Figure 11 This is a schematic diagram of the overall structure of the present invention after clamping. Figure 4 ;

[0077] Figure 12 for Figure 11 Side view of the middle side panel.

[0078] Figure 13 This is a schematic diagram of the overall structure of the present invention after clamping. Figure 3 ;

[0079] Figure 14 This is a schematic diagram of the overall structure of the present invention during disassembly. Figure 3 ;

[0080] Figure 15 for Figure 13 A schematic diagram of the hook clamp after it has been assembled.

[0081] Figure 16 for Figure 14 A schematic diagram of the hook clamp during disassembly;

[0082] Figure 17 for Figure 13 Diagram of the guide groove structure on the middle wedge surface;

[0083] Figure 18 for Figure 13Connection diagram of the middle wedge surface and the limiting block;

[0084] Figure 19 for Figure 13 Schematic diagram of the middle side clamp;

[0085] Figure 20 for Figure 19 A magnified view of a section at point A in the middle;

[0086] Figure 21 for Figure 19 Schematic diagram of the middle side clamp;

[0087] Figure 22 This is a schematic diagram of the pressure-applying side clamp of the pressure screw in this invention;

[0088] In the diagram: 1. Upper mold base; 11. Upper mold mounting slot; 2. Side clamping plate; 21. T-shaped lifting hole; 211. Connecting bolt; 212. Return spring; 22. Guide structure; 23. Boss; 231. Mounting base; 2311. Axial hole; 2312. Contact post; 2313. Radial hole; 2314. Spring; 2315. Release post; 2316. Guide sleeve; 2317. Limiting hole; 2318. Limiting head; 24. 25. Connecting hole 2; 3. Hook clamp; 31. Movable body; 32. Hook clamp body; 321. Limiting block; 322. Limiting body; 33. Boss 1; 34. Wedge surface; 341. Guide groove; 3411. Guide part 1; 3412. Guide part 2; 3413. Guide part 3; 3414. Guide part 4; 35. Pressure bearing body; 4. Driving component; 5. Upper die cutting tool; 51. Hook hanging groove; 6. Compensation block. Detailed Implementation

[0089] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0090] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] One implementation method:

[0092] like Figure 1As shown, a quick-assembly and disassembly clamping device for a bending upper die includes an upper die base 1, a hook clamp 3, and a side clamping plate 2. The hook clamp 3 is disposed between the side clamping plate 2 and the upper die base 1, and the side clamping plate 2 constrains the running trajectory of the hook clamp 3 and prevents the two from disengaging. The trajectory of the hook clamp 3 is set by the side clamping plate 2, and it will move along a predetermined route when the side clamping plate 2 moves away from and towards the upper die base 1.

[0093] When the side clamping plate 2 moves toward the upper mold base 1, the side clamping plate 2 drives the hook clamping piece 3 to move upward, and the hook clamping piece 3 drives the upper mold cutting tool 5 to move upward until the upper mold cutting tool 5 is fixed to the upper mold base 1.

[0094] When the side clamping plate 2 moves away from the upper mold base 1, the hook clamping piece 3 and the upper mold cutting tool 5 move down to the lowest point under their own gravity, and then the upper mold cutting tool selectively separates from the hook clamping piece at the lowest point.

[0095] In use, after the upper die cutting tool 5 is moved upward to the area between the side clamping plate 2 and the upper die base 1, the hook clamp can restrict its downward movement by gravity to prevent it from falling. When the side clamping plate 2 approaches the upper die base 1, the hook clamp will drive the upper die cutting tool upward, pressing the upper die body onto the upper die base, thus completing the upward movement and pressing it onto the mounting reference surface. The side clamping plate 2 can be moved closer to or further away from the upper die base 1 by using a threaded rod that passes through the side clamping plate 2. The threaded rod is installed on the upper die base 1 to apply pressure to the side clamping plate 2 towards the side closer to the upper die base 1.

[0096] One implementation method:

[0097] like Figure 3 As shown, the hook clamp 3 is further improved and optimized: the hook clamp 3 includes a hook clamp body 32, which is used to hook the upper die cutting tool 5 to prevent it from falling off in its natural state. By using the hook clamp body 32 to hook the upper die cutting tool 5 after it is installed upwards between the side clamping plate 2 and the upper die base 1, the effect of gravity can be overcome, preventing it from falling off. The hook clamping surface of the hook clamp body 32 includes an L-shaped structure (concave structure) composed of a horizontal plane and a vertical plane. Before clamping the upper die cutting tool 5, the hook clamp 32 is in a suspended state at its lowest point.

[0098] like Figure 7 As shown, a pressure-bearing body 35 is integrally connected to the top of the hook clamp body 32, and the pressure-bearing body 35 is located on the top of the upper die cutting tool 5; the pressure-bearing body 35 and the hook clamping area of ​​the hook clamp body 32 form a limiting area, which is used to restrict the upper die cutting tool 5 and the hook clamp 3 from moving synchronously upward.

[0099] During disassembly, after the side clamping plate 2 moves away from the upper mold base 1 to its initial position (i.e., the hook clamping piece 3 descends to its lowest point), the upper mold cutting tool 5 actively moves upward, which will drive the pressure bearing body 35 upward. When the pressure bearing body 35 moves upward, it will move forward relative to the upper mold cutting tool 5, and the hook clamping body 32 and the upper mold cutting tool 5 will separate. Then, the upper mold cutting tool 5 is quickly pulled down to complete the disassembly. Alternatively, the upper mold cutting tool can be tilted upward first, then brought closer to the upper mold base, and finally quickly pulled down to complete the disassembly.

[0100] The hook clamp 3 also includes a movable body 31, which slides relative to the side clamping plate 2 without disengaging. The hook clamp body 32 is integrally connected to the movable body 31 on the side opposite to the upper mold base 1. This ensures that the relative movement of the hook clamp 3 and the side pressure plate 2 is smooth.

[0101] One implementation method:

[0102] like Figure 2 As shown, the side clamping plate 2 is further improved and optimized: the side clamping plate 2 is provided with a guide structure 22, which is used to guide the hook clamping piece 3 synchronously in the vertical and horizontal directions.

[0103] The guide structure 22 is obliquely upward and is located at the bottom of the side clamping plate 2 near the upper mold base 1. The guide structure 22 is a groove with an angle of 10-89° with the horizontal plane, preferably 45°, and the vertical displacement of the hook clamp 3 is equal to the horizontal front-to-back displacement.

[0104] One implementation method:

[0105] like Figure 2 As shown, the specific structure of the guide structure 22 is further defined: the lower surface of the guide structure 22 is provided with multiple steps continuously arranged along the depth direction of the guide structure 22, and the side of the hook clamp 3 facing the guide structure 22 is provided with a step surface adapted to the steps. This ensures structural strength and reduces the thickness and volume of the side clamping plate while ensuring the stroke.

[0106] One implementation method:

[0107] like Figure 1 , 4 As shown in Figures 5, 6, and 7, the hook clamp 3 of the further restrictive structure has a downwardly extending boss 33 on its lower top surface; the guide structure 22 has an upwardly extending boss 23 on its lower inner wall surface; boss 33 is located above and corresponds to boss 23, and the two together are used to constrain the lowest point position of the hook clamp 3. This achieves the setting of the lowest point position and also ensures the load strength.

[0108] One implementation method:

[0109] like Figure 1 , 2As shown in Figures 5, 6, and 7, a limiting member is provided on the side clamping plate 2. The limiting member is used to constrain the movement direction of the hook clamp 3 relative to the side clamping plate 2. The side clamping plate 2 is provided with a T-shaped mounting hole 21. The limiting member is installed in the T-shaped mounting hole 21 and connected and fixed to the hook clamp 3. The limiting member is used to restrict the lateral degree of freedom of the hook clamp 3 within the guide structure 22.

[0110] The T-shaped mounting hole 21 is located on the side of the side clamping plate 2 facing away from the upper mold base 1. The cross-section of the T-shaped lifting hole 21 is larger at the top and smaller at the bottom. The T-shaped mounting hole 21 is opened obliquely downward. The angle between the T-shaped lifting hole 21 and the horizontal plane is 10-89°, preferably 45°. The vertical displacement of the hook clamp 3 is equal to the horizontal front-to-back displacement.

[0111] The limiting component includes a limiting pin 211, which is movably installed in the T-shaped mounting hole 21 and is threadedly connected to the hook clamp 3.

[0112] The limiting component also includes a spring 212 fitted on the outside of the limiting pin 211, which can reduce the impact between the bosses.

[0113] One implementation method:

[0114] like Figure 11 and Figure 12 As shown, the side clamping plate 2 is provided with a waist-shaped hole 26. The waist-shaped hole 26 is located at the bottom of the side clamping plate 2 on the side opposite to the upper mold base 1. The waist-shaped hole 26 is arranged obliquely upward and communicates with the guide groove structure 22. The limiting member is a connecting pin 27 for connecting the hook clamp 3. The connecting pin 27 is set perpendicular to the hook clamp 3.

[0115] Because the hook clamp is equipped with a pressure-bearing body, during the upward movement of the upper mold body, due to the weight of the hook clamp itself, if the width of the upper mold cutting tool is significantly smaller than the width of the slider, when the upper mold cutting tool pushes against the pressure-bearing body, if it does not reach the middle position of the hook clamp, one end of the hook clamp will be lifted while the other end is lifted to a lower height due to less force. This increases the resistance between the hook clamp and the guide structure, making it prone to jamming. At the same time, the linearity of the movement will be poor, resulting in severe wear. It can also cause a "virtual disassembly" phenomenon where one end of the anti-fall surface detaches from the upper mold cutting tool while the other end is still in the groove of the upper mold cutting tool, making it impossible to complete the disassembly in one go. Furthermore, because the side clamp has holes for the drive component and guide rod, placing the motion retaining structure on the upper part of the side clamp would result in a limited number of balance points (generally two to three). Therefore, an upward-sloping, oblong hole is designed at the bottom of the side clamp. This allows for the placement of balance points according to actual needs, effectively avoiding the holes for the drive component and guide rod, and significantly increasing the number of balance points. The motion retaining component is installed within the oblong hole to prevent this problem, ensuring smooth sliding and linear movement of the guide structure and hook clamp. Compared to using limit pins and springs, this design also allows for lateral installation.

[0116] One implementation method:

[0117] like Figure 1 , 5 As shown in Figures 6, 8, and 9, the clamping device further includes a driving component 4, which drives the side clamping plate 2 to selectively approach or move away from the upper mold base 1. The side clamping plate 2 is installed on the front side of the upper mold base 1; the driving component 4 is installed on the rear side of the upper mold base 1; the movable end of the driving component 4 passes through the upper mold base 1 and drives the side clamping plate 2 to move away from or towards the upper mold base 1. A guide rod is provided on the upper mold base 1, and the guide rod is arranged parallel to the movement direction of the movable end of the driving component 4, for guiding the movement of the side clamping plate 2 when it approaches or moves away from the upper mold base 1.

[0118] The driving component 4 is a cylinder, hydraulic cylinder, or electric telescopic rod.

[0119] like Figure 20 As shown, the clamping device also includes a pressure screw or an operating handle, which is used to move the side clamping plate 2 closer to or away from the upper mold base 1. The pressure screw passes through the side pressure plate and is threadedly connected to the upper mold base 1. The pressure screw is used to press the side clamping plate 2 towards the side closer to the upper mold base 1. The operating handle has the structure shown in 201610433585.5.

[0120] In one of the above solutions, such as Figures 11 to 16As shown, the bottom of the hook clamp body 32 can be improved. An adjustable limiting block 321 is installed on the wedge-shaped surface 34 of the hook clamp body 32. The limiting block 321 is slidably installed on the wedge-shaped surface 34, and a guide groove 341 is provided on the wedge-shaped surface 34. A limiting body 322 is installed on the limiting block 321. The limiting body 322 is rotatably installed on the limiting block 321, and its free end has a hook portion that is movably installed in the guide groove 341. The limiting body 322 has a thin rod-shaped structure with a certain elastic deformation capacity. Furthermore, the guide groove 341 includes a guide section 1 3411, a guide section 2 3412, a guide section 3413, and a guide section 4 3414 arranged sequentially. The end of the guide section 4 3414 communicates with the beginning of the guide section 1 3411, and the depth of the end of the guide section 4 3414 is less than the depth of the beginning of the guide section 1 3411. The groove depth of guide part 3411 gradually decreases along the laying direction. The depth of the first end of guide part 3412 is greater than the depth of the end of guide part 3411. The depth of guide part 3412 gradually decreases along the laying direction. The depth of the first end of guide part 3413 is greater than the depth of the end of guide part 3412. The depth of guide part 3413 decreases along the laying direction. The depth of the first end of guide part 3414 is greater than the depth of the end of guide part 3413. The depth of guide part 3414 gradually decreases along the laying direction. The position where the first end of guide part 3413 connects with the end of guide part 2412 is lower than the position where the end of guide part 3413 connects with the first end of guide part 2412. The position where the first end of guide part 3413 connects with the end of guide part 2412 is higher than the position where the end of guide part 3414 connects with the first end of guide part 3411. When the limiting body 322 is at the end of the guide section 2 3412, the distance between the bottom surface of the limiting block 321 and the hook clamping surface is less than or equal to the groove size of the upper die cutting tool 5. When the limiting body 322 is at the beginning of the guide section 1 3411, the distance between the bottom surface of the limiting block 321 and the hook clamping surface is greater than the groove size of the upper die cutting tool 5. That is, the limiting block 321 on the hook clamping body 32 has two limit values ​​between its bottom surface and the hook clamping surface (a maximum value and a minimum value; the minimum value is less than or equal to the groove size of the upper die cutting tool 5, which facilitates entry into the groove; the maximum value is greater than the groove size of the upper die cutting tool 5, which prevents entry into the groove).

[0121] During the installation of the upper die cutting tool 5, the upper die cutting tool 5 is installed from bottom to top. The top of the upper die cutting tool 5 contacts the limiting block 321 and drives the limiting block 321 to move upward. The limiting block 321 moves upward relative to the hook clamp body 32 and moves backward relative to it. The limiting block 321 continues to move upward until the hook part of the limiting body 322 enters the first end of the guide part 3411 and the first end of the guide part 3412. As the upper die cutting tool 5 continues to move upward, the limiting block 321 and the hook clamp body 32 move upward together. When the limiting block 321... After separating from the upper die cutting tool 5, the hook of the limiting body 322 will enter the first end of the guide part 3413 from the first end of the guide part 2 3412. As it continues to move upward, until the hook clamp 32 is located on the lower side of the upper surface of the inner wall of the slot of the upper die cutting tool 5, the upper die cutting tool 5 will then fall down, and the hook clamp 32 will enter the slot under the action of gravity. Then the side pressure plate 2 (under the action of the driving member 4) approaches the upper die base, and the hook clamp will then press and fix the upper die cutting tool 5 on the upper die base.

[0122] When the upper die cutting tool 5 is disassembled, it is moved upwards. The limiting block 321 on the lower surface of the slot of the upper die cutting tool 5 moves upwards, and the hook of the limiting body 322 enters from the beginning of the guide section 3413 to the beginning of the guide section 4414. The hook clamp 32 will first separate from the slot. After the limiting body 322 enters the beginning of the guide section 4414, the upper die cutting tool 5 then falls, and the limiting body 322 enters the guide section 4414 along its end. At the head of part 3411, the limiting block 321 will descend relative to the hook clamp body 32 and gradually approach it. When the limiting block 321 is completely disengaged from the slot, the limiting block 321 and the side of the hook clamp body 32 near the lower mold base are a plane. Since the height difference between the bottom of the limiting block 321 and the hook clamp surface of the hook clamp body 32 is greater than the size of the slot opening, the two cannot enter the slot, and the upper mold cutting tool 5 falls without obstruction, thus completing the straight up and down disassembly work.

[0123] In one of the above solutions, such as Figures 17 to 19As shown, the partial structure of the side clamp 2 can be improved. The side clamp 2 is provided with a first connection hole 25 and a second connection hole 24. The first connection hole 25 is used to install the movable end of the drive component 4, and a mounting base 231 is installed inside the first connection hole 25. An axial hole 2311 is provided on the side of the mounting base 231 opposite to the movable end. A contact post 2312 is movably installed inside the axial hole 2311. The contact post 2312 is arranged outside the axial hole 2311 and directly facing the movable end. A radial hole 2313 is provided on the side of the mounting base 2311. A spring 2314 and a release post 2315 are installed inside the radial hole 2313. The release post 2315 is flexibly installed by spring 2314, with its free end exposed. The exposed part can freely enter the second connection hole 24. One end of the contact post 2312 and the release post 2315 are fitted in the mounting base 231, and the fitting surface is a wedge-shaped surface. A guide sleeve 2316 is installed in the second connection hole 24. The guide sleeve 2316 and the guide rod are axially adapted. A limit hole 2317 is provided on the guide sleeve 2316, and a limit head 2318 (elastic limit pin) is provided on the guide rod. The limit hole 2317 and the limit head 2318 are adapted, and the limit hole 2317 and the release post 2315 are directly opposite and adapted.

[0124] When the movable end of the driving component 4 moves the side clamping plate 2 closer to the upper die base, the movable end first moves away from the contact post 2312. After it is completely disengaged, the movable end will move the side clamping plate 2 closer to the upper die base. When the side clamping plate 2 moves to the minimum distance relative to the upper die base (when the hook clamping component presses and fixes the upper die cutting tool on the upper die base), the limiting head 2318 on the guide rod is adapted to the limiting hole 2317 of the guide sleeve 2316, completing self-locking. When disassembling, the movable end will first gradually compress the contact post 2312, so that the release post 2315 disengages the limiting head 2318 on the guide rod from the limiting hole 2317, and then moves the side clamping plate 2 away from the upper die base to the initial position. After the limiting head 2318 on the guide rod and the limiting hole 2317 on the guide sleeve 2316 are adapted, self-locking is completed, and unlocking is completed when the driving component 4 moves the side clamping plate 2 away from the upper die base. This prevents the adverse effects caused by the failure of the upper die cutting tool fixation during bending processing.

[0125] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. After the hook clamp fixes the upper mold body, the top rear sidewall and the top rear upper surface of the upper mold body are both pressed against the upper mold base. Equivalent substitutions or modifications made to the technical solution and inventive concept of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A quick-assembly and disassembly clamping device for a bending upper die, comprising an upper die base (1), characterized in that, It also includes hook clamps (3) and side clamps (2); The hook clamp (3) is located between the side clamp (2) and the upper mold base (1). The side clamp (2) constrains the running trajectory of the hook clamp (3) and the two do not separate. When the side clamp (2) moves toward the upper mold base (1), the side clamp (2) drives the hook clamp (3) to move upward, and the hook clamp (3) drives the upper mold cutting tool (5) to move upward until the upper mold cutting tool (5) is fixed to the upper mold base (1); When the side clamping plate (2) moves away from the upper mold base (1), the hook clamp (3) and the upper mold cutting tool (5) move down to the lowest point under their own gravity; The hook clamp (3) includes a hook clamp body (32), and the bottom of the hook clamp body (32) near the upper mold base (1) is provided with an upwardly sloping wedge-shaped surface (34). An adjustable limiting block (321) is installed on the wedge-shaped surface (34) of the hook clamp body (32). The limiting block (321) is slidably installed on the wedge-shaped surface (34), and a guide groove (341) is provided on the wedge-shaped surface (34). A limiting body (322) is installed on the limiting block (321). The limiting body (322) is rotatably installed on the limiting block (321), and a hook part is provided at its free end, which is movably installed in the guide groove (341). The limiting body (322) is a thin rod-shaped structure with a certain elastic deformation capacity. Secondly, the guide groove (341) 1) Includes a guide section 1 (3411), a guide section 2 (3412), a guide section 3 (3413), and a guide section 4 (3414) arranged sequentially. The end of the guide section 4 (3414) is connected to the beginning of the guide section 1 (3411), and the depth of the end of the guide section 4 (3414) is less than the depth of the beginning of the guide section 1 (3411). The groove depth of the guide section 1 (3411) gradually decreases along the laying direction. The depth of the beginning of the guide section 2 (3412) is greater than the depth of the end of the guide section 1 (3411). 12) The depth gradually decreases along the laying direction. The depth of the first end of guide part three (3413) is greater than the depth of the last end of guide part two (3412). The depth of guide part three (3413) decreases sequentially along the laying direction. The depth of the first end of guide part four (3414) is greater than the depth of the last end of guide part three (3413). The depth of guide part four (3414) gradually decreases along the laying direction. The position of the connection between the first end of guide part three (3413) and the last end of guide part two (3412) is lower than the position of the last end of guide part three (3413) and the first end of guide part two (3412). At the end connection point, the connection point of the first end of guide part three (3413) and the end of guide part two (3412) is higher than the connection point of the end of guide part four (3414) and the first end of guide part one (3411). When the limit body (322) is at the end of guide part two (3412), the distance between the bottom surface of the limit block (321) and the hook clamping surface is less than or equal to the groove size of the upper die tool (5). When the limit body (322) is at the first end of guide part one (3411), the distance between the bottom surface of the limit block (321) and the hook clamping surface is greater than the groove size of the upper die tool (5).

2. The clamping device for quick assembly and disassembly of a bending upper die according to claim 1, characterized in that: The hook clamp (32) is used to hook the upper die blade (5) to prevent it from falling off in its natural state; The top of the hook clamp (32) is integrally connected to a pressure bearing (35), which is located on the top of the upper die tool (5); The pressure-bearing body (35) and the hook clamping body (32) form a limiting area, which is used to restrict the vertical synchronous movement of the upper die cutting tool (5) and the hook clamping part (3).

3. The clamping device for quick assembly and disassembly of a bending upper die according to claim 2, characterized in that: The hook clamp (3) also includes a movable body (31), which slides relative to the side clamp (2) without separating from it, and the hook clamp (32) is integrally connected to the side of the movable body (31) relative to the upper mold base (1).

4. A clamping device for quick assembly and disassembly of a bending upper die according to claim 1 or 3, characterized in that: The side clamp (2) is provided with a guide structure (22), which is used to guide the hook clamp (3) synchronously in the vertical and horizontal directions.

5. The clamping device for quick assembly and disassembly of a bending upper die according to claim 4, characterized in that: The guide structure (22) is opened obliquely upward and is located at the bottom of the side clamping plate (2) near the upper mold base (1).

6. The clamping device for quick assembly and disassembly of a bending upper die according to claim 4, characterized in that: The guide structure (22) is a groove with an angle of 10-89° with the horizontal plane.

7. The clamping device for quick assembly and disassembly of a bending upper die according to claim 4, characterized in that: The lower surface of the guide structure (22) is provided with multiple steps that are continuously arranged along the depth direction of the guide structure (22), and the hook clamp (3) is provided with a step surface that matches the steps on the side facing the guide structure (22).

8. The clamping device for quick assembly and disassembly of a bending upper die according to claim 4, characterized in that: The hook clamp (3) has a downwardly extending boss (33) on its top lower surface. The lower surface of the inner wall of the guide structure (22) is provided with an upwardly extending boss (23); Boss 1 (33) is located above Boss 2 (23) and is in the same position. Together they are used to constrain the lowest point of the hook clamp (3).

9. A clamping device for quick assembly and disassembly of a bending upper die according to claim 4, characterized in that: The side clamp (2) is provided with a limiting member, which is used to constrain the movement direction of the hook clamp (3) relative to the side clamp (2).

10. A clamping device for quick assembly and disassembly of a bending upper die according to claim 9, characterized in that: The side clamping plate (2) is provided with a T-shaped mounting hole (21). The T-shaped mounting hole (21) is located on the side of the side clamping plate (2) facing away from the upper mold base (1). The cross-section of the T-shaped mounting hole (21) is larger at the top and smaller at the bottom. The limiting member is installed in the T-shaped mounting hole (21) and connected and fixed with the hook clamp (3).

11. A clamping device for quick assembly and disassembly of a bending upper die according to claim 10, characterized in that: The T-shaped mounting hole (21) is opened at an angle downward, and the angle between the T-shaped mounting hole (21) and the horizontal plane is 10-89°.

12. The clamping device for quick assembly and disassembly of a bending upper die according to claim 9, characterized in that: The side clamp (2) is provided with a waist-shaped hole (26). The waist-shaped hole (26) is located at the bottom of the side clamp (2) facing away from the upper mold base (1). The waist-shaped hole (26) is arranged obliquely upward and communicates with the guide structure (22). The limiting member is a connecting pin (27) used to connect the hook clamp (3).

13. The clamping device for quick assembly and disassembly of a bending upper die according to claim 10, characterized in that: The limiting component includes a limiting pin (211), which is movably installed in the T-shaped mounting hole (21) and threadedly connected to the hook clamp (3).

14. The clamping device for quick assembly and disassembly of a bending upper die according to claim 13, characterized in that: The limiting component also includes a spring (212) fitted on the outside of the limiting pin (211).

15. A clamping device for quick assembly and disassembly of a bending upper die according to claim 1, characterized in that: The clamping device also includes a drive component (4), which is used to drive the side clamping plate (2) to selectively approach or move away from the upper mold base (1).

16. A clamping device for quick assembly and disassembly of a bending upper die according to claim 15, characterized in that: The side clamp (2) is installed on the front side of the upper mold base (1); The drive component (4) is installed on the rear side of the upper mold base (1); The movable end of the driving component (4) passes through the upper mold base (1) and drives the side clamping plate (2) away from or close to the upper mold base (1).

17. A clamping device for quick assembly and disassembly of a bending upper die according to claim 16, characterized in that: The upper mold base (1) is provided with a guide rod, which is arranged parallel to the moving direction of the movable end of the drive component (4) and is used to guide the movement of the side clamp (2) when it is close to or away from the upper mold base (1).

18. A clamping device for quick assembly and disassembly of a bending upper die according to claim 15, characterized in that: The driving component (4) is a cylinder, a hydraulic cylinder, or an electric telescopic rod.

19. A clamping device for quick assembly and disassembly of a bending upper die according to claim 15, characterized in that: The driving component (4) is a feed component that penetrates the side clamp (2).

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