A method for installing a pneumatic motor in a double-sided shear blade changing machine

Abstract

This invention discloses a method for installing a pneumatic motor in a double-sided shear blade changer, belonging to the technical field of double-sided shear blade changers. The method includes the following steps: preparing a pneumatic motor, a pneumatic control cabinet, an external displacement sensor, a control box, and the necessary connecting pipes; closing the original main air supply pipe of the double-sided shear blade changer, closing the ball valve of the original hydraulic motor, and disconnecting the original electrical signal line; removing the original hydraulic motor piping assembly and the original hydraulic motor, and installing the pneumatic motor. By replacing the drive mechanism of the double-sided shear blade changer from the original hydraulic motor to a pneumatic motor, the problems of long procurement cycles, high maintenance costs, and short service life of the original hydraulic motor are solved. Because the external dimensions of the pneumatic motor are completely consistent with the original hydraulic motor, no additional connecting parts need to be processed during replacement; it can be directly replaced. The reducer and other components also do not require any changes, and its weight is lighter than the original hydraulic motor, making replacement and installation easier.

Description

Technical Field

[0001] This invention belongs to the technical field of double-sided shear blade changing machines, and particularly relates to a method for installing a pneumatic motor in a double-sided shear blade changing machine. Background Technology

[0002] Double-sided shears with blade changing mechanism are shearing equipment used in sheet metal production. Existing double-sided shears with blade changing mechanism use hydraulic motors as the drive component for the lifting pallet. These hydraulic motors are niche products with long procurement cycles, high prices, and no readily available replacement parts. Using CNC-machined parts for replacement increases maintenance costs, shortens service life, and is unstable. If other drive components are used as replacements, their torque cannot be guaranteed. If the drive component torque is too low, the lifting pallet cannot rise properly; if the torque is too high, it may damage components such as the reducer. Furthermore, if the replacement drive component differs significantly in appearance from the hydraulic motor, the reducer and other components need to be modified accordingly, making the process quite cumbersome. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a method for installing a pneumatic motor in a double-sided shear blade changing machine.

[0004] To achieve the above objectives, the invention adopts the following technical solution: a method for installing a pneumatic motor in a double-sided shear blade changing machine, comprising the following steps:

[0005] Prepare the pneumatic motor, pneumatic control cabinet, external displacement sensor, control box, and necessary connecting pipes;

[0006] Close the original main air supply pipe of the double-sided shear blade changer, close the ball valve of the original hydraulic motor, and disconnect the original electrical signal line;

[0007] Remove the original hydraulic motor piping assembly and its original hydraulic motor, and install the pneumatic motor;

[0008] Install the pneumatic control cabinet, connect the air inlet of the pneumatic control cabinet to the main air source pipe, and connect the air inlet of the pneumatic motor to the pneumatic control cabinet;

[0009] Connect the original electrical signal lines to the control box;

[0010] The external displacement sensor is installed on the double-sided shear blade changing machine;

[0011] Edit the program, check the installation effect, open the main air supply pipe, and adjust the air supply pressure on the air control cabinet;

[0012] The double-sided shear blade changing machine was tested. After the test was successful, it was confirmed that the pneumatic motor was installed and put into use.

[0013] By adopting the above technical solution, this method plans every step from preparation to testing in detail, ensuring that the pneumatic motor can successfully replace the original hydraulic motor, and solving the problems of long procurement cycle, high price, high maintenance cost and short service life of the original hydraulic motor.

[0014] Optionally, the housing shape, side length of the mounting flange, length from the output end of the connecting shaft to the flange end face, and shaft diameter of the output end of the connecting shaft of the pneumatic motor are the same as those of the original hydraulic motor, and the rated torque of the pneumatic motor is 1.5-2 times that of the original hydraulic motor.

[0015] By adopting the above technical solution, since the key dimensions remain the same, the pneumatic motor can directly replace the original hydraulic motor without the need for large-scale modification or redesign of other parts of the double-sided shear blade changer, thus greatly simplifying the upgrade process and reducing installation difficulty and cost.

[0016] Optionally, the pneumatic motor is a vane-type pneumatic motor. The pneumatic motor has a piston chamber and a mounting groove communicating with the piston chamber on its inner side. A piston located outside the shaft of the pneumatic motor is provided inside the piston chamber. A connecting groove is provided on the side wall of the piston. A spring is installed between the connecting groove and the piston chamber. An air inlet is provided at the end of the piston chamber away from the connecting groove. A dynamic friction plate located inside the mounting groove is provided outside the shaft of the pneumatic motor. A connecting piece located inside the mounting groove is installed on the outside of the piston. A static friction plate is fixedly connected to the end of the connecting piece away from the piston.

[0017] By adopting the above technical solution, in order to solve the problem of the lifting pallet hovering, it can withstand the torque applied to the pneumatic motor shaft when the pneumatic motor is not in operation due to no air input, so that it can maintain the original angle of the pneumatic motor shaft and not rotate.

[0018] Optionally, by disassembling the bolts between the original hydraulic motor flange and the original coupling, and the bolts between the original hydraulic motor and the original fixed bracket, the output end of the pneumatic motor connecting shaft is connected to the original coupling, and the pneumatic motor is positioned on the original fixed bracket, and the pneumatic motor is connected and fixed by fixing bolts.

[0019] By adopting the above technical solutions, the replacement and installation process of pneumatic motors becomes more efficient and precise, and ensures a secure connection.

[0020] Optionally, the external displacement sensor is connected via a mounting bracket, the movable end of the external displacement sensor is connected to the original lifting plate via the mounting bracket, and the fixed end of the external displacement sensor is connected to the original fixed base via the mounting bracket.

[0021] By using the above-mentioned technical solution and installing an external displacement sensor, the height and position of the lifting platform can be precisely controlled, preventing safety and equipment accidents.

[0022] Optionally, the pneumatic control cabinet is installed within 5m of the original lifting platform. The pneumatic control cabinet is equipped with a three-position five-way double-electric control slide valve, a one-way throttle valve, a ball valve, a shuttle valve, and an external connector. The original main air source pipe has a hole with a diameter of 25mm. A transition connector is welded to the hole. The transition connector is connected to the ball valve through a pipe. The air inlet end of the pneumatic motor is connected to a conversion connector. The conversion connector is connected to the external connector through a hose.

[0023] By adopting the above technical solution, the pneumatic control cabinet is installed within 5m of the original lifting platform, which facilitates operation and monitoring. At the same time, it reduces the length and resistance of the pipeline and improves the transmission efficiency of the air source. The pneumatic control cabinet is equipped with components such as a three-position five-way dual-electric control slide valve, a one-way throttle valve, a ball valve, a shuttle valve and external connectors, which meet the various functional requirements of the pneumatic system for air source processing, flow control and direction switching.

[0024] Optionally, the pneumatic control cabinet is equipped with a fast pneumatic reversing valve and a low-speed pneumatic reversing valve. Each of the fast pneumatic reversing valve and the low-speed pneumatic reversing valve is provided with two electromagnet plugs. All four electromagnet plugs are electrically connected to the control box via electrical signal lines. The control box can be connected to the original electrical signal lines.

[0025] By adopting the above technical solutions, the combined use of the fast-acting pneumatic directional valve and the low-speed pneumatic directional valve makes the steering and speed control of the pneumatic motor more precise. The fast-acting directional valve is suitable for occasions requiring rapid response, such as emergency shutdown or rapid reversal; while the low-speed directional valve is suitable for occasions requiring smooth transition, such as start-up, acceleration or deceleration. Through the coordinated work of the two valves, fine adjustment of the pneumatic motor can be achieved to meet different production needs.

[0026] Optionally, the pneumatic motor includes at least four operating modes:

[0027] Disassembly and shearing mode: When the lifting pallet needs to be raised, select "Disassemble Shearing Blade" on the control panel. The pneumatic motor drives the lifting pallet to rise, and the disassembly and shearing device disassembles the shearing blade after releasing the shearing blade locking cylinder.

[0028] Install scissor blade mode: When the lifting platform needs to be raised, select "Install scissor blade". When the pneumatic motor drives the lifting platform to rise 605mm, jog up or down to align the scissor blade position. When the lifting platform height reaches 635mm, lock the scissor blade locking cylinder to complete the installation of the scissor blade.

[0029] Installing the lowered scissor blade: When the lifting platform needs to be raised, select "Install Lowered Scissor Blade"; when the pneumatic motor drives the lifting platform to 390mm, jog up or down to align the scissor blade position; when the height of lifting platform 1 reaches 420mm, lock the scissor blade locking cylinder to complete the installation of the lowered scissor blade.

[0030] Fault mode: All operations are completed by jogging. If one circuit fails, the other circuit can be used to replace the shear blade.

[0031] By adopting the above technical solutions, the pneumatic motor of the double-sided shear blade changer has achieved flexible switching and precise control of multiple operating modes. This not only improves the operating efficiency and reliability of the equipment, but also reduces the labor intensity and maintenance costs of operators, providing strong support for the production and development of enterprises.

[0032] Optionally, the experimental tests include at least three types:

[0033] Action adjustment: Manually operate the lifting platform in both up and down directions under no-load in the initial position to confirm that the action is correct and reliable. Increase the load on the shear blade and perform up and down movement operations. Adjust the air source pressure so that the pneumatic motor meets the requirements of the shear blade lifting action.

[0034] Hovering function test: The pneumatic motor drives the lifting plate to support the scissor blade and suspend it at a certain position to see if it can maintain its original height.

[0035] Automatic blade disassembly and assembly mode function test: In the blade changing working position, whether each mode can complete its function as designed, and adjust the relevant program according to the actual situation.

[0036] By adopting the above technical solution, this test ensures the stability, precise control capability and reliability of the pneumatic motor under different load conditions, providing a solid foundation for subsequent automated operation. At the same time, it verifies whether each operating mode can complete its function as designed in the blade changing position, and adjusts the relevant programs according to the actual situation.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] 1. By replacing the drive mechanism of the double-sided shear blade changer from a hydraulic motor to a pneumatic motor, the problems of long procurement cycles, high prices, high maintenance costs, and short service life of the original hydraulic motor are solved. Because the external dimensions of the pneumatic motor are completely identical to the original hydraulic motor, no additional connecting parts need to be machined during replacement; it can be directly replaced. The reducer and other components also do not require any changes, and its weight is lighter than the original hydraulic motor, making replacement and installation easier. 2. The pneumatic motor can adjust the pressure and flow rate through a control valve to obtain the required power and speed. Except for parts requiring manual confirmation, the lifting and lowering actions of the shear blades can be performed for different tasks. 3. One-button operation for lifting reduces the labor intensity and safety of on-site personnel; 4. By installing an external displacement sensor and control box, real-time monitoring and control of the lifting pallet position are achieved, improving the automation and intelligence level of the equipment. At the same time, the pneumatic motor supports multiple operating modes, such as shearing mode, shear blade on / off mode, and fault mode, making the operation of the equipment more flexible and convenient; 5. When the pneumatic motor is overloaded, due to the compressibility of compressed air, the motor speed will automatically decrease or stop, thereby avoiding damage to mechanical parts. This overload protection mechanism extends the service life of the equipment and reduces maintenance costs. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the shear blade replacement device of the present invention;

[0040] Figure 2 This is a top view of the shear blade replacement device of the present invention;

[0041] Figure 3 This is a schematic diagram of the original hydraulic motor mounting position structure of the present invention;

[0042] Figure 4 This is a schematic diagram of the original hydraulic motor structure of the present invention;

[0043] Figure 5 This is a schematic diagram of the pneumatic motor structure of the present invention;

[0044] Figure 6 This is a schematic diagram of the cross-sectional structure of the pneumatic motor of the present invention;

[0045] Figure 7 This is a schematic diagram of the pneumatic motor control principle structure of the present invention;

[0046] Figure 8 This is a schematic diagram of the pneumatic control cabinet structure of the present invention;

[0047] Figure 9 This is a schematic diagram of the installation position of the external displacement sensor and the pneumatic motor of the present invention.

[0048] In the diagram: 1. Lifting pallet; 2. Shear blade changing trolley; 3. Lifting roller conveyor; 4. Conveying trolley; 5. Conveying roller conveyor; 6. Frame; 7. Original hydraulic motor; 8. Electric motor; 9. Gear shaft; 10. Rack; 11. Reducer; 12. Pneumatic motor; 13. Piston chamber; 14. Mounting slot; 15. Piston; 16. Spring; 17. Air inlet; 18. Dynamic friction plate; 19. Static friction plate; 20. Connecting part; 21. Rotating shaft; 22. Pneumatic control cabinet; 23. Air source treatment triple unit; 24. Ball valve; 25. External connector; 26. Shuttle valve; 27. One-way throttle valve; 28. Three-position five-way double electric control slide valve; 29. ​​External displacement sensor; 30. Coupling. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "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.

[0051] like Figure 1 As shown in Figure 9, the specific solution of the embodiment is as follows: A method for installing a pneumatic motor in a double-sided shear blade changing machine includes the following steps:

[0052] Prepare pneumatic motor 12, pneumatic control cabinet 22, external displacement sensor 29, control box and necessary connecting pipes;

[0053] Close the original main air supply pipe of the double-sided shear blade changer, close the ball valve 24 of the original hydraulic motor 7 and disconnect the original electrical signal line;

[0054] like Figure 1 and Figure 2As shown, the double-sided shear blade changing machine consists of a fixed side shear and a mobile side shear. The fixed side shear is directly fixed on the base, while the mobile side shear is installed on a hydrostatic guide rail to adapt to different plate widths. Each side shear consists of a pinch roller, a body, and a blade changing device. The two eccentric shafts on the inlet side of the shear drive the upper blade to roll along the straight lower blade to shear the edge of the steel plate, so that the sheared steel plate reaches the width required by the finished product. The third eccentric shaft drives the upper blade of the edge-breaking shear to move up and down, breaking the continuous waste edge cut off by the edge cutting, so that it can fall smoothly into the chute and be transported out.

[0055] With the aid of laser marking, the steel plate to be cut is adjusted by the centering device on the double-sided shear input roller conveyor to control the cutting edge amount on both sides of the steel plate within a suitable range. During shearing, the clamping rollers clamp the steel plate and feed the plate intermittently and accurately according to the set step length and cycle. During the plate feeding interval, the pressure plate device descends and presses the steel plate, and the left and right shears cut simultaneously. The cut scrap is transported to the scrap basket outside the factory via the scrap chute and belt. The above actions are repeated until the cutting edge of a steel plate is completed. The fixed side shear and the mobile side shear each have their own set of blade changing devices, which are arranged at the rear of their respective shears.

[0056] The shear blade changing device mainly consists of a conveyor roller 5, a lifting roller 3, a conveyor trolley 4, a shear blade changing trolley 2, and a lifting pallet 1. During shear blade changing, the motor 8 drives the conveyor trolley 4 forward via a chain to above the shear blade changing trolley 2. The shear blade changing trolley 2, carrying the lifting pallet 1, moves to below the shear blade. The original hydraulic motor 7 drives the lifting pallet 1 to rise below the upper shear blade. The installation position of the original hydraulic motor 7 and its location are shown in the image. Figure 3 and Figure 4 As shown, the upper shear blade clamping cylinder is released, the lifting pallet 1 driven by the original hydraulic motor 7 descends, and the upper shear blade is placed on the conveyor trolley 4. The original hydraulic motor 7 drives the lifting pallet 1 to rise below the lower shear blade. The lower shear blade clamping cylinder is released, the lifting pallet 1 driven by the original hydraulic motor 7 descends, and the lower shear blade is placed on the conveyor trolley 4. The motor 8 drives the conveyor trolley 4 to retract and place the old shear blade on the lifting roller conveyor 3. The lifting roller conveyor 3 rises, and the operator pushes it onto the conveyor roller conveyor 5, waiting to be lifted away. Then, the operator manually places the new shear blade, which has been pre-placed on another row of conveyor roller conveyors 5. The shear blade is pushed onto the lifting roller conveyor 3, which descends to place the new shear blade onto the conveyor trolley 4. The motor 8 drives the conveyor trolley 4 forward to above the shear blade replacement trolley 2. The original hydraulic motor 7 drives the lifting pallet 1 to lift the new lower shear blade and place it in the installation position on the shearing machine, where it is fixed by the clamping cylinder. The lifting pallet 1 then descends to the zero position without load. The original hydraulic motor 7 drives the lifting pallet 1 to lift the new upper shear blade and place it in the installation position on the shearing machine, where it is fixed by the clamping cylinder. The lifting pallet 1 then descends to the zero position, the transport trolley returns to the starting position, the old shear blade is recovered, and the shear blade replacement is complete.

[0057] Remove the original hydraulic motor 7 piping assembly and the original hydraulic motor 7, and install the pneumatic motor 12. The pneumatic motor 12 is as follows: Figure 5 As shown, the housing shape, side length of the mounting flange, length from the output end of the connecting shaft to the flange end face, and shaft diameter of the connecting shaft of the pneumatic motor 12 are the same as those of the original hydraulic motor 7. The side length of the mounting flange of the pneumatic motor 12 is 135mm, the length from the output end of the connecting shaft to the flange end face is 27.2mm, and the shaft diameter of the output end of the connecting shaft is 15.85mm. This design ensures that its center height is completely consistent with that of the original hydraulic motor 7, without the need to modify the installation dimensions of the original reducer 11 and other components. The rated torque of the pneumatic motor 12 is 1.5-2 times that of the original hydraulic motor 7.

[0058] The pneumatic motor 12 is a vane-type pneumatic motor, which has a planetary reduction gear output, such as... Figure 6 As shown, the pneumatic motor 12 has a piston chamber 13 and a mounting groove 14 communicating with the piston chamber 13 on its inner side. The piston chamber 13 has a piston 15 located outside the shaft 21 of the pneumatic motor 12 on its inner side. The side wall of the piston 15 has a connecting groove. A spring 16 is installed between the connecting groove and the piston chamber 13. An air inlet 17 is provided at the end of the piston chamber 13 away from the connecting groove. A dynamic friction plate 18 is provided on the outer side of the shaft 21 of the pneumatic motor 12, located inside the mounting groove 14. A connector 20 is installed on the outer side of the piston 15, located inside the mounting groove 14. A static friction plate 19 is fixedly connected to the end of the connector 20 away from the piston 15.

[0059] When there is no air input, the pneumatic motor 12 can be locked. The friction between the moving friction plate 18 and the stationary friction plate 19, which are in direct contact and pressed against each other, transmits the motion and torque of the driving plate to the driven plate. The driven plate is circumferentially fixed, thereby achieving the purpose of braking. The brake is released by using compressed air, which converts the pressure energy into mechanical energy through the piston 15 and the cylinder, overcoming the preload of the spring 16 and releasing the moving friction plate 18 and the stationary friction plate 19, so that they lose contact and the friction force returns to zero. This solves the problem of the lifting pallet 1 being suspended. When the pneumatic motor 12 is not in operation and there is no air input, it can withstand the torque applied to the motor shaft from the outside, maintain the original angle, and not rotate. The process is to remove the bolts between the flange of the original hydraulic motor 7 and the original coupling 30, and the bolts between the original hydraulic motor 7 and the original fixed bracket, connect the output end of the connecting shaft of the pneumatic motor 12 to the original coupling 30, and place the pneumatic motor 12 on the original fixed bracket. The pneumatic motor is then connected and fixed by fixing bolts.

[0060] Install the pneumatic control cabinet 22, connect the air inlet of the pneumatic control cabinet 22 to the main air source pipe, and connect the air inlet of the pneumatic motor 12 to the pneumatic control cabinet 22.

[0061] The pneumatic control cabinet 22 is installed within 5m of the original lifting platform 1, such as Figure 7 As shown, the pneumatic control cabinet 22 is equipped with a three-way air source treatment unit 23, a three-position five-way double-electric control slide valve 28, a one-way throttle valve 27, a ball valve 24, a shuttle valve 26, and an external connector 25. After the gas in the main air source pipe passes through the main air source valve, it is processed by the three-way air source treatment unit 23 to remove moisture, oil, and solid impurities from the air source, and adjust the air source pressure to meet the working requirements. Finally, the gas is used as power to provide atomized lubricating oil to the pneumatic components in the pneumatic system, ensuring the long-term operation of the pneumatic motor 12. The three-position five-way double-electric control slide valve 28 is selected so that when the reversing valve is not working and the two electromagnets are de-energized, the interface connected to the pneumatic motor 12 is open to the atmosphere and without pressure, controlling the direction of motor movement and start and stop. After the compressed air from each branch exits the pneumatic reversing valve, the one-way throttle valve 27 is used to adjust the operating speed of the pneumatic motor 12.

[0062] The original main air supply pipe has a hole with a diameter of 25mm. A transition joint is welded to the hole. The transition joint is connected to the ball valve 24 through a pipe. The air inlet of the pneumatic motor 12 is connected to a conversion joint. The conversion joint is a G3 / 4 hinged conversion joint. The conversion joint is connected to the external connector 25 through a hose. The exhaust port of the pneumatic motor 12 is equipped with a silencer with a G3 / 4 interface. The silencer can reduce noise pollution.

[0063] Connect the original electrical signal lines to the control box;

[0064] like Figure 8 As shown, the pneumatic control cabinet is equipped with a fast pneumatic reversing valve and a low-speed pneumatic reversing valve. Each of the fast pneumatic reversing valve and the low-speed pneumatic reversing valve is provided with two electromagnet plugs. All four electromagnet plugs are electrically connected to the control box via electrical signal lines. The control box can be connected to the original electrical signal lines.

[0065] The mounting positions of the external displacement sensor 29 and the pneumatic motor 12 are as follows: Figure 9 As shown, the external displacement sensor 29 is installed on the double-sided shear blade changing machine. The external displacement sensor 29 is connected through a mounting bracket. The movable end of the external displacement sensor 29 is connected to the original lifting pallet 1 through the mounting bracket, and the fixed end of the external displacement sensor 29 is connected to the original fixed base through the mounting bracket. The addition of the external displacement sensor 29 enables precise control of the height position of the lifting pallet 1, preventing safety and equipment accidents.

[0066] Edit the program, check the installation effect, open the main air supply pipe, and adjust the air supply pressure on the air control cabinet 22;

[0067] The double-sided shear blade changing machine was tested. After the test was successful, it was confirmed that the pneumatic motor 12 was installed and put into use.

[0068] The experiment tested three types of movements: Action adjustment: The lifting platform 1 was manually operated in both up and down directions under no-load from the initial position to confirm its correctness and reliability. The load on the shear blade was increased, and the up and down movements were performed. The air pressure was adjusted so that the pneumatic motor 12 met the requirements for shear blade lifting. Suspension function test: The pneumatic motor 12 drove the lifting platform 1 to hold the shear blade in a certain position to see if it could maintain its original height. Automatic shear blade disassembly and assembly mode function test: When changing the shear blade working position, it was tested whether each mode could complete its function as designed. The relevant programs were adjusted according to the actual situation.

[0069] The pneumatic motor 12 includes at least four operating modes. In the shearing disassembly mode: when the lifting pallet 1 is at its lowest point, the external displacement sensor displays an initial position of 0mm. Selecting "Disassemble Shear Blade" energizes the rapid pneumatic reversing valve, causing the pneumatic motor 12 to drive the lifting pallet 1 to rise rapidly at 40mm / s. When the lifting pallet 1 stops rising, it maintains a constant height for up to 1 second. At this point, the lifting pallet 1 has contacted the underside of the shear blade. The pneumatic motor 12 automatically stops in case of overload, preventing mechanical overload damage. The rapid pneumatic reversing valve is de-energized and in the venting position. The friction plate keeps the pneumatic motor 12 in its original state and stops rotating. The lifting pallet 1 hovers and supports the shear blade. The shear blade locking cylinder is released. Selecting "Disassemble Shear Blade" again energizes the low-speed pneumatic reversing valve, causing the pneumatic motor 12 to reverse and drive the lifting pallet 1 to descend rapidly at 40mm / s. When the lifting pallet 1 reaches its initial position, the old shear blade is placed on the transport trolley.

[0070] Installing the shear blade: When the lifting pallet 1 is at its lowest point, the external displacement sensor displays an initial position of 0mm. At this time, the new shear blade is placed on the transport trolley. Select "Install Shear Blade," the fast pneumatic reversing valve is energized, and the pneumatic motor 12 drives the lifting pallet 1 to rise rapidly at 40mm / s. When the lifting pallet 1 reaches 585mm, the fast pneumatic reversing valve is de-energized, and the low-speed pneumatic reversing valve is energized. The lifting pallet 1 automatically switches to a slow rise at 10mm / s to the 605mm position. The low-speed pneumatic reversing valve is de-energized, and the lifting pallet 1 hovers to support the shear blade. Due to factors such as the precision of mechanical equipment, there may be positional deviations or the shear blade locking cylinder may not be aligned with the locking groove. Manual inspection of the actual situation is required. If necessary, measures should be taken to adjust the horizontal position of the shear blade. When the shear blade locking cylinder and locking groove are well aligned, you can use "manual slow rise" and "manual slow fall" to adjust the height of the lifting platform 1 at a speed of 10mm / s. After confirming that the shear blade locking cylinder and locking groove are aligned, use the "manual slow rise" low-speed pneumatic reversing valve to energize it, so that the lifting platform 1 rises slowly, allowing the locking head of the shear blade locking cylinder to fully engage in the shear blade locking groove. When the lifting platform 1 stops rising, it means that the shear blade has been raised to the correct position. At this time, the height of the lifting platform 1 should be 635mm. Lock the shear blade locking cylinder, and select "install shear blade" again. The quick pneumatic reversing valve is energized, and the pneumatic motor 12 reverses to drive the lifting platform 1 to descend quickly at 40mm / s. When the lifting platform 1 reaches the initial position, the quick pneumatic reversing valve is de-energized, and the lifting platform 1 hovers at the 0mm position.

[0071] Installing the shear blade: When the lifting pallet 1 is at its lowest point, the external displacement sensor displays an initial position of 0mm. At this time, the new shear blade is placed on the transport trolley. Select "Install Shear Blade," the fast pneumatic reversing valve is energized, and the pneumatic motor 12 drives the lifting pallet 1 to rise rapidly at 40mm / s. When the lifting pallet 1 reaches 370mm, the fast pneumatic reversing valve is de-energized, and the low-speed pneumatic reversing valve is energized. The lifting pallet 1 automatically switches to a slow rise at 10mm / s to the 390mm position. The low-speed pneumatic reversing valve is de-energized, and the lifting pallet 1 hovers to support the shear blade. Due to factors such as the precision of mechanical equipment, there may be positional deviations or the shear blade locking cylinder may not be aligned with the locking groove. Manual inspection of the actual situation is required. If necessary, measures should be taken to adjust the horizontal position of the shear blade. When the shear blade locking cylinder and locking groove are well aligned, the height of the lifting platform 1 can be adjusted at a speed of 10mm / s using "manual slow rise" and "manual slow fall". After confirming that the shear blade locking cylinder and locking groove are aligned, the low-speed pneumatic reversing valve of "manual slow rise" is energized to make the lifting platform 1 rise slowly, allowing the locking head of the shear blade locking cylinder to fully engage in the shear blade locking groove. When the lifting platform 1 stops rising, it means that the shear blade has been raised to the correct position. At this time, the height of the lifting platform 1 should be 420mm. Lock the shear blade locking cylinder, and select "Install Lower Shear Blade" again. The fast pneumatic reversing valve is energized, and the pneumatic motor 12 reverses to drive the lifting platform 1 to descend rapidly at 40mm / s. When the lifting platform 1 reaches the initial position, the fast pneumatic reversing valve is de-energized, and the lifting platform 1 is suspended at the 0mm position.

[0072] Fault mode: When the slow branch fails, the fast branch is used to complete the blade replacement work of the whole stroke. The "manual fast rise" fast pneumatic reversing valve and the "manual fast fall" fast pneumatic reversing valve can be energized to control the lifting platform 1 to rise and fall. At this time, the two one-way throttle valves 27, 03.1 and 03.2, should be adjusted to adjust the lifting speed from 40mm / s to 25mm / s, taking into account both safety and work efficiency.

[0073] When the fast branch line fails, the slow branch line is used to complete the replacement of the shear blades throughout the entire stroke. The "manual slow rise" low-speed pneumatic reversing valve and the "manual slow fall" low-speed pneumatic reversing valve can be energized to control the lifting platform 1 to rise and fall. At this time, the two one-way throttle valves 27, 03.3 and 03.4, should be adjusted to adjust the lifting speed from 10mm / s to 25mm / s, taking into account both safety and work efficiency.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for installing a pneumatic motor in a double-sided shear blade changing machine, characterized in that, Includes the following steps: Prepare the pneumatic motor, pneumatic control cabinet, external displacement sensor, control box, and necessary connecting pipes; Close the original main air supply pipe of the double-sided shear blade changer, close the ball valve of the original hydraulic motor, and disconnect the original electrical signal line; Remove the original hydraulic motor piping assembly and its original hydraulic motor, and install the pneumatic motor; Install the pneumatic control cabinet, connect the air inlet of the pneumatic control cabinet to the main air source pipe, and connect the air inlet of the pneumatic motor to the pneumatic control cabinet; Connect the original electrical signal lines to the control box; The external displacement sensor is installed on the double-sided shear blade changing machine; Edit the program, check the installation effect, open the main air supply pipe, and adjust the air supply pressure on the air control cabinet; The double-sided shear blade changing machine was tested. After the test was successful, it was confirmed that the pneumatic motor was installed and put into use. The pneumatic motor is a vane-type pneumatic motor. The inner side of the pneumatic motor has a piston chamber and a mounting groove communicating with the piston chamber. A piston located outside the shaft of the pneumatic motor is located inside the piston chamber. A connecting groove is formed on the side wall of the piston. A spring is installed between the connecting groove and the piston chamber. An air inlet is located at the end of the piston chamber away from the connecting groove. A dynamic friction plate is located inside the mounting groove on the outer side of the pneumatic motor shaft. A connecting piece located inside the mounting groove is installed on the outer side of the piston. A static friction plate is fixedly connected to the end of the connecting piece away from the piston. The external displacement sensor is installed via... The bracket is connected, and the movable end of the external displacement sensor is connected to the original lifting platform through the mounting bracket. The fixed end of the external displacement sensor is connected to the original fixed base through the mounting bracket. The pneumatic control cabinet is installed within 5m of the original lifting platform. The pneumatic control cabinet is equipped with a three-position five-way double-electric control slide valve, a one-way throttle valve, a ball valve, a shuttle valve, and an external connector. A 25mm diameter hole is opened on the original main air source pipe, and a transition connector is welded on the hole. The transition connector is connected to the ball valve through a pipe. The air inlet end of the pneumatic motor is connected to a conversion connector, and the conversion connector is connected to the external connector through a hose.

2. The pneumatic motor installation method for a double-sided shear blade changing machine according to claim 1, characterized in that: The pneumatic motor has the same housing shape, mounting flange side length, length from the output end of the connecting shaft to the flange end face, and shaft diameter at the output end of the connecting shaft as the original hydraulic motor. The rated torque of the pneumatic motor is 1.5-2 times that of the original hydraulic motor.

3. The pneumatic motor installation method for a double-sided shear blade changing machine according to claim 1, characterized in that: By disassembling the bolts between the original hydraulic motor flange and the original coupling, and the bolts between the original hydraulic motor and the original fixed bracket, the output end of the pneumatic motor connecting shaft is connected to the original coupling, and the pneumatic motor is positioned on the original fixed bracket. The pneumatic motor is then connected and fixed using fixing bolts.

4. The pneumatic motor installation method for a double-sided shear blade changing machine according to claim 1, characterized in that: The pneumatic control cabinet is equipped with a fast pneumatic reversing valve and a low-speed pneumatic reversing valve. Each of the fast pneumatic reversing valve and the low-speed pneumatic reversing valve is equipped with two electromagnet plugs. All four electromagnet plugs are electrically connected to the control box via electrical signal lines. The control box can be connected to the original electrical signal lines.

5. The pneumatic motor installation method for a double-sided shear blade changing machine according to claim 1, characterized in that: The pneumatic motor includes at least four operating modes: Disassembly and shearing mode: When the lifting pallet needs to be raised, select "Disassemble Shearing Blade" on the control panel. The pneumatic motor drives the lifting pallet to rise, and the disassembly and shearing device disassembles the shearing blade after releasing the shearing blade locking cylinder. Install scissor blade mode: When the lifting platform needs to be raised, select "Install scissor blade". When the pneumatic motor drives the lifting platform to rise 605mm, jog up or down to align the scissor blade position. When the lifting platform height reaches 635mm, lock the scissor blade locking cylinder to complete the installation of the scissor blade. Installing the lowered scissor blade: When the lifting platform needs to be raised, select "Install Lowered Scissor Blade"; when the pneumatic motor drives the lifting platform to 390mm, jog up or down to align the scissor blade position; when the height of lifting platform 1 reaches 420mm, lock the scissor blade locking cylinder to complete the installation of the lowered scissor blade. Fault mode: All operations are completed by jogging. If one circuit fails, the other circuit can be used to replace the shear blade.

6. The pneumatic motor installation method for a double-sided shear blade changing machine according to claim 1, characterized in that: The experimental tests include at least three types: Action adjustment: Manually operate the lifting platform in both up and down directions under no-load in the initial position to confirm that the action is correct and reliable. Increase the load on the shear blade and perform up and down movement operations. Adjust the air source pressure so that the pneumatic motor meets the requirements of the shear blade lifting action. Hovering function test: The pneumatic motor drives the lifting plate to support the scissor blade and suspend it at a certain position to see if it can maintain its original height. Automatic blade disassembly and assembly mode function test: In the blade changing working position, whether each mode can complete its function as designed, and adjust the relevant program according to the actual situation.

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