Pneumatic clamping jig

Abstract

The pneumatic clamping jig comprises an air cylinder, a lifting plate, two connecting plates and two pressing plates, the lifting plate is arranged at the telescopic end of the air cylinder and is of an arch structure, the two connecting plates are hinged to the two ends of the lifting plate respectively, and the ends, away from each other, of the two pressing plates are hinged to the two connecting plates respectively; the clamping jig is arranged, the lifting plate can be controlled to ascend and descend under the work of the air cylinder, then the state of the pressing plate is adjusted, supporting is provided for the end of the pressing plate to abut against the plate or the position, where the pressing plate is flatly placed on the plate to limit the plate, of the pressing plate, and then the plate is placed stably; in addition, the clamping jig can relieve limitation of the plate before the conveying device controls the plate to move, convenience is provided for plate slitting, sweeps are prevented from entering a hole channel of mechanical equipment, meanwhile, the energy conversion efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal cutting technology, specifically a pneumatic clamping fixture. Background Technology

[0002] During the production of laminates or molded sheets, large-sized laminates or molded sheets need to be cut into smaller sheets according to customer requirements so that they can be used in specific working environments.

[0003] As mentioned above, to efficiently complete the slitting of the sheet material, mechanical equipment is generally used for the slitting process. When using mechanical equipment to slitting the sheet material, the operator needs to place the entire sheet material on the equipment and then operate the equipment to complete the slitting process according to preset parameters. Alternatively, a composite material sheet cutting machine disclosed in Chinese Patent Publication No. CN101758513B can be used to complete the slitting process. This sheet cutting machine includes a digital display, a pneumatic control unit, a worktable, a vacuum cleaner, a scale, a movable bracket, a cutting saw, and a pneumatic motor. The crossbeam is fixed to one side of the worktable; the linear guide rail is located on the surface of the crossbeam connecting plate. The movable bracket is fixed to the slider; the pneumatic motor and the cutting saw are mounted on the movable bracket. The digital ruler is fixed to the crossbeam connecting plate; the scale is located at one end of the worktable. The digital display and the pneumatic control unit are located above the crossbeam column at one end of the worktable. This invention achieves high-straightness plate edges through high-precision guide rails, and the use of digital rulers and digital displays simplifies equipment operation, enabling mechanical cutting of composite material plates. It features simple structure, ease of use, low cost, and high cutting efficiency.

[0004] In the process of cutting sheet metal using the aforementioned mechanical equipment, the sheet metal is either stabilized by its own weight or by using an air pump to create a pressure difference across the sheet metal. When using the sheet metal's own weight, its stability gradually decreases as its mass decreases, affecting the cutting process. When using an air pump to restrict the sheet metal, it usually cannot completely cover the channels of the machine's worktable. Therefore, when the air pump is operating, it faces the entire worktable surface, and only the area covered by the sheet metal achieves higher energy conversion, resulting in reduced energy conversion efficiency. Furthermore, under the action of the air pump, the waste chips generated during cutting flow into the channels of the worktable surface due to the pressure difference, which can easily cause blockage over time. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic clamping fixture, which aims to improve the problem of low conversion rate and energy waste caused by the stable placement of plates by air pump control in plate cutting equipment.

[0006] This utility model is implemented as follows:

[0007] A pneumatic clamping fixture includes a cylinder, a lifting plate, two connecting plates, and two pressure plates. The lifting plate is configured with an arc-shaped structure and is located at the extension end of the cylinder. The two connecting plates are respectively hinged to both ends of the lifting plate, and the ends of the two pressure plates that are far apart from each other are respectively hinged to the two connecting plates.

[0008] Both ends of the lifting plate are provided with end tubes, and bolts are installed through the end tubes. A movable plate can be inserted into the inner side of the end tubes. The movable plate is provided with through holes, and the end is hinged to the connecting plate. The bolts are installed through the through holes.

[0009] The pressure plate is configured as a second pressure plate. The end of the second pressure plate is provided with a groove. The side wall of the groove is provided with a sliding hole. An intermediate plate and a second support plate are provided at the groove. The middle part of the intermediate plate is hinged to the top of the second support plate, and a rod is provided through the end of the intermediate plate. The end of the rod extends into the sliding hole. The second pressure plate is hinged to the top of the connecting plate at one end near the second support plate.

[0010] A limiting groove is provided on the side wall of the second pressure plate. The central angle of the limiting groove is greater than 180°, and both the upper and lower ends are open. A limiting post is provided through the limiting groove.

[0011] Furthermore, the pressure plate is configured as a first pressure plate, with an end post at one end and a mounting hole at the other end. A first support plate is hinged at the mounting hole, and the first pressure plate is hinged to the top of the connecting plate at one end near the first support plate.

[0012] Furthermore, the lifting plate is located below the worktable, the other end of the cylinder away from the lifting plate is connected to the worktable, both connecting plates are located on both sides of the worktable, the pressure plate is located above the worktable, and the support plate is installed on the worktable.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is equipped with a clamping fixture, which can control the lifting plate to rise and fall under the operation of the cylinder, thereby adjusting the state of the pressure plate, providing support for the end of the pressure plate to press against the plate, or for the pressure plate to be placed flat on the plate to restrict the position of the plate, thereby making the plate more stable; in addition, the clamping fixture can release the restriction of the plate before the conveying device controls the movement of the plate, which facilitates the cutting of the plate, prevents waste from entering the channel of the mechanical equipment, and improves the energy conversion efficiency and reduces energy consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first three-dimensional structure of the clamping fixture of this utility model;

[0015] Figure 2This is a three-dimensional structural diagram of the end of the lifting plate of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the first pressure plate and connecting plate of this utility model;

[0017] Figure 4 This is a schematic diagram of the second three-dimensional structure of the clamping fixture of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the second pressure plate and connecting plate of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the second pressure plate and the limiting column of this utility model;

[0020] Figure 7 This is a structural diagram of the clamping fixture and the sheet metal cutting equipment.

[0021] In the diagram: 1. Bracket; 2. Clamping fixture; 21. Cylinder; 22. Lifting plate; 221. End tube; 222. Movable plate; 223. Perforation; 23. Connecting plate; 24. First pressure plate; 241. First support plate; 242. End post; 243. Mounting hole; 25. Second pressure plate; 251. Restriction groove; 252. Groove; 253. Sliding hole; 254. Intermediate plate; 255. Second support plate; 26. Restriction post; 3. Slitting assembly; 5. Conveying device. Detailed implementation method:

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0024] As described in the background section, when cutting sheet metal using mechanical equipment, the sheet metal needs to be placed stably under the action of an air pump. However, the sheet metal only covers part of the channels, resulting in low air pump efficiency. Furthermore, the sheet metal cannot be placed stably using its own weight. To solve the above problems, this embodiment provides a corresponding technical solution, as detailed below.

[0025] Example 1

[0026] like Figure 7As shown, to reduce the risk to workers during the board cutting process and facilitate board cleaning, this embodiment provides a device for board cutting, specifically including a support 1 and a cutting assembly 3. A worktable is provided on the top of the support 1, and a notch is provided on the worktable. The cutting assembly 3 includes a saw blade 31, the central axis of which is connected to the output shaft of a motor, and the top of the saw blade 31 can pass through the notch 13. To control the movement of the board above the worktable, a conveying device 5 is provided at both ends of the worktable. The conveying device 5 includes an annular belt 51 and support rollers, with multiple support rollers evenly distributed and passing through the annular belt 51, and connected to the motor. The specific structure of the support 1, the cutting assembly 3, and the conveying device 5 is described in detail in another patent application document of the applicant. Please refer to the other patent application, entitled "An Automatic Fixed-Length Cutting Sawing Machine".

[0027] like Figure 1 , Figure 2 , Figure 7 As shown, to ensure the stable placement of the sheet metal to be cut relative to the worktable 12, a clamping fixture 2 can be installed at the end of the worktable 12 away from the detection component 4. This fixture includes a cylinder 21, a lifting plate 22, two connecting plates 23, and two pressure plates. The lifting plate 22 is located below the worktable 12 and at the extension end of the cylinder 21. The other end of the cylinder 21 away from the lifting plate 22 is connected to the worktable 12. The lifting plate 22 has an arc-shaped structure, and its curved structure facilitates smooth hinged connection of the connecting plates. To ensure uniform force distribution during the lifting stroke, both ends of the lifting plate 22 are equipped with end tubes 221, through which bolts are installed. Movable plates 222 can be inserted into the inner side of each end tube 221. The movable plates 222 have through holes 223, and their ends are hinged to connecting plates 23. Bolts also pass through the through holes 223. Two connecting plates 23 are located on both sides of the worktable 12, with their lower ends hinged to the two movable plates 222 respectively. Pressure plates are hinged to the upper ends of the two connecting plates 23 respectively. Under the operation of the cylinder 21, the lifting plate 22 can be raised and lowered, thereby driving the connecting plates 23 to rise and fall. The connecting plates 23 then drive the pressure plates to work, causing the end furthest from the connecting plates 23 to press against the plate material.

[0028] like Figure 3 As shown, the pressure plate is configured as a first pressure plate 24. One end of the first pressure plate 24 is provided with an end post 242, and the other end is provided with a mounting hole 243. A first support plate 241 is hinged at the mounting hole 243. The first support plate 241 is mounted on the worktable 12. The end of the first pressure plate 24 adjacent to the first support plate 241 is hinged to the top of the connecting plate 23. When the connecting plate 23 rises, it can force the end post 242 to descend and press against the plate, so that the plate is stably placed relative to the worktable 12. When the conveying device 5 needs to control the movement of the plate, the connecting plate 23 descends, causing the end post 242 to rise, releasing the restriction on the plate.

[0029] The aforementioned motors, cylinders, etc., are all electrically connected to the control box, and a display screen can also be installed on the control box for touch screen operation by staff.

[0030] Example 2

[0031] like Figure 7 As shown, to reduce the risk to workers during the board cutting process and facilitate board cleaning, this embodiment provides a device for board cutting, specifically including a support 1 and a cutting assembly 3. A worktable is provided on the top of the support 1, and a notch is provided on the worktable. The cutting assembly 3 includes a saw blade 31, the central axis of which is connected to the output shaft of a motor, and the top of the saw blade 31 can pass through the notch 13. To control the movement of the board above the worktable, a conveying device 5 is provided at both ends of the worktable. The conveying device 5 includes an annular belt 51 and support rollers, with multiple support rollers evenly distributed and passing through the annular belt 51, and connected to the motor. The specific structure of the support 1, the cutting assembly 3, and the conveying device 5 is described in detail in another patent application document of the applicant. Please refer to the other patent application, entitled "An Automatic Fixed-Length Cutting Sawing Machine".

[0032] like Figure 4 , Figure 7 As shown, in order to stably place the sheet material to be cut relative to the workbench 12, a clamping fixture 2 can be set at the end of the workbench 12 away from the detection component 4. The fixture includes a cylinder 21, a lifting plate 22, two connecting plates 23, and two pressure plates. The lifting plate 22 is set below the workbench 12 and at the telescopic end of the cylinder 21. The other end of the cylinder 21 away from the lifting plate 22 is connected to the workbench 12. Both ends of the lifting plate 22 are provided with end tubes 221, and bolts are installed through the end tubes 221. Movable plates 222 can be inserted into the inner side. The movable plates 222 are provided with through holes 223 and their ends are hinged to the connecting plates 23. The bolts are installed through the through holes 223. The two connecting plates 23 are set on both sides of the workbench 12 and their lower ends are respectively hinged to the two movable plates 222. Pressure plates are respectively hinged to the upper ends of the two connecting plates 23. When the cylinder 21 is working, the lifting plate 22 can be raised and lowered, which in turn drives the connecting plate 23 to rise and fall. The connecting plate 23 drives the pressure plate to work, so that the end away from the connecting plate 23 presses against the plate.

[0033] like Figure 5 , Figure 6As shown, the pressure plate is configured as a second pressure plate 25. The end of the second pressure plate 25 has a groove 252, and the side wall of the groove 252 has a sliding hole 253. An intermediate plate 254 and a second support plate 255 are located at the groove 252. The middle part of the intermediate plate 254 is hinged to the top of the second support plate 255, and a rod is inserted through its end, with the end of the rod extending into the sliding hole 253. The second pressure plate 25 is hinged to the top of the connecting plate 23 at one end near the second support plate 255. A limiting groove 251 is provided on the side wall of the second pressure plate 25. The central angle of the limiting groove 251 is greater than 180°, and both its upper and lower ends are open. A limiting post 26 is inserted through the limiting groove 251. Under the action of the limiting post 26, the second pressure plate 25 can stably move up and down relative to the worktable 12. When the connecting plate 23 rises, the end of the intermediate plate 254 that extends into the groove 252 descends, and under the action of the rod, controls the second pressure plate 25 to descend as a whole, fitting against the plate and ensuring stable placement of the plate. When the conveying device 5 needs to control the movement of the plate, the connecting plate 23 descends, and the second pressure plate 25 rises as a whole, releasing the restriction on the plate.

[0034] The aforementioned motor, cylinder, infrared rangefinder 43, etc. are all electrically connected to the control box 17, and a display screen can also be installed on the control box 17 for touch screen operation by the staff.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic clamping fixture, characterized in that, It includes a cylinder (21), a lifting plate (22), two connecting plates (23) and two pressure plates. The lifting plate (22) is configured as an arc-shaped structure and is located at the telescopic end of the cylinder (21). The two connecting plates (23) are respectively hinged to both ends of the lifting plate (22). The ends of the two pressure plates that are far apart from each other are respectively hinged to the two connecting plates (23). Both ends of the lifting plate (22) are provided with end tubes (221), bolts are provided through the end tubes (221), and movable plates (222) can be inserted into the inner side. The movable plates (222) are provided with through holes (223), and the ends are hinged to the connecting plate (23). At the same time, bolts are provided through the through holes (223). The pressure plate is configured as a second pressure plate (25), and the end of the second pressure plate (25) is provided with a groove (252). The side wall of the groove (252) is provided with a sliding hole (253). An intermediate plate (254) and a second support plate (255) are provided at the groove (252). The middle part of the intermediate plate (254) is hinged to the top of the second support plate (255), and a rod is provided through the end of the intermediate plate (254). The end of the rod extends into the sliding hole (253). The second pressure plate (25) is hinged to the top of the connecting plate (23) at one end near the second support plate (255). A limiting groove (251) is provided on the side wall of the second pressure plate (25). The central angle of the limiting groove (251) is greater than 180°, and both the upper and lower ends are open. A limiting post (26) is provided through the limiting groove (251).

2. The pneumatic clamping fixture according to claim 1, characterized in that, The pressure plate is configured as a first pressure plate (24), one end of the first pressure plate (24) is provided with an end post (242), and the other end is provided with a mounting hole (243). A first support plate (241) is hinged at the mounting hole (243), and the first pressure plate (24) is hinged to the top of the connecting plate (23) at one end near the first support plate (241).

3. A pneumatic clamping fixture according to claim 1 or 2, characterized in that, The lifting plate (22) is located below the workbench (12), the other end of the cylinder (21) away from the lifting plate (22) is connected to the workbench (12), the two connecting plates (23) are located on both sides of the workbench (12), the pressure plate is located above the workbench (12), and the support plate is installed on the workbench (12).

Images