Pneumatic motor mounting method of double-side shear blade changing machine

Abstract

The invention discloses a pneumatic motor mounting method of a double-side shear blade changing machine, and belongs to the technical field of double-side shear blade changing machines. The invention discloses a pneumatic motor mounting method of a double-side shear blade changing machine. The pneumatic motor mounting method comprises the following steps: preparing a pneumatic motor, a pneumatic control cabinet, an external displacement sensor, a control box and required connecting pipe fittings; closing an original main air source pipe of the double-side shear blade changing machine, closing a ball valve of an original hydraulic motor and disconnecting an original electrical signal line; an original hydraulic motor pipeline assembly and an original hydraulic motor of the original hydraulic motor pipeline assembly are disassembled, and the pneumatic motor is installed; the driving mode of the double-side shear blade replacing machine is replaced by the pneumatic motor from an original hydraulic motor, the problems that the original hydraulic motor is long in purchasing period, high in maintenance cost and short in service life are solved, the pneumatic motor is completely consistent with the original hydraulic motor in appearance connection size, connecting pieces do not need to be additionally machined during replacement, and the pneumatic motor can be directly replaced; the speed reducer and other parts do not need to be changed, and the hydraulic motor is lighter than an original hydraulic motor and is easy to replace and install.

Description

Technical Field

[0001] The invention belongs to the technical field of double-sided shearing blade changing machines, and in particular relates to a method for installing a pneumatic motor of a double-sided shearing blade changing machine. Background Art

[0002] Double-sided shearing and blade changing machine is a kind of shearing equipment for plate production. The driving part used for the lifting and lowering pallet of the existing double-sided shearing and blade changing machine is a hydraulic motor. Its hydraulic motor is a niche hydraulic motor with a long procurement cycle, high price, and no finished parts to replace. If the parts are processed by CNC center for replacement, the maintenance cost will increase and the service life will be short and unstable. If other driving elements are used for replacement, the torque of the driving element cannot be guaranteed. Once the torque of the driving element is too small, the lifting and lowering pallet cannot rise normally. Once the torque of the driving element is too large, it may damage the reducer and other components. In addition, if the appearance of the replaced driving element is too different from that of the hydraulic motor, then after replacement, the reducer and other components need to be modified accordingly, and the process is relatively cumbersome. Summary of the invention

[0003] The purpose of the present invention is to provide a method for installing a pneumatic motor of a double-sided shearing blade changing machine in view of the problems existing in the prior art.

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

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

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

[0007] Dismantle the original hydraulic motor pipeline assembly and its original hydraulic motor, and install the pneumatic motor;

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

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

[0010] Installing the external displacement sensor on the double-sided shearing blade changing machine;

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

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

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

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

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

[0016] Optionally, the pneumatic motor is a vane-type pneumatic motor, a piston cavity and a mounting groove connected to the piston cavity are provided on the inner side of the pneumatic motor, a piston located on the outer side of the rotating shaft of the pneumatic motor is provided on the inner side of the piston cavity, a connecting groove is provided on the side wall of the piston, a spring is installed between the connecting groove and the piston cavity, an air inlet is provided on the end of the piston cavity away from the connecting groove, a dynamic friction plate located on the inner side of the mounting groove is provided on the outer side of the rotating shaft of the pneumatic motor, a connecting piece located on the inner side of the mounting groove is installed on the outer side of the piston, and 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, when the pneumatic motor has no air source input and is not in operation, it can withstand the torque applied to the pneumatic motor shaft from the outside, so that the pneumatic motor shaft maintains the original angle and does not rotate.

[0018] Optionally, 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 are removed, the output end of the pneumatic motor connecting shaft is connected to the original coupling, and the pneumatic motor is located on the original fixed bracket, and the pneumatic motor is connected and fixed by fixing bolts.

[0019] By adopting the above technical solution, the replacement and installation process of the pneumatic motor becomes more efficient and accurate, and ensures its stable connection.

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

[0021] By adopting the above-mentioned technical solution and setting up an external displacement sensor, the height position of the lifting pallet can be accurately controlled to prevent safety and equipment accidents.

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

[0023] By adopting the above technical solution, the air control cabinet is installed within 5m of the original lifting pallet, which is convenient for operation and monitoring. At the same time, it also reduces the pipeline length and resistance, and improves the transmission efficiency of the gas source. The air control cabinet is equipped with air source processing triplet, three-position five-way double electric control slide valve, one-way throttle valve, ball valve, shuttle valve and external connector and other components to meet the pneumatic system's various functional requirements for air source processing, flow control, direction switching and so on.

[0024] Optionally, a fast pneumatic reversing valve and a low-speed pneumatic reversing valve are installed on the air control cabinet, and two electromagnet plugs are respectively provided on the fast pneumatic reversing valve and the low-speed pneumatic reversing valve. The four electromagnet plugs are electrically connected to the control box through electrical signal lines, and the control box can be connected to the original electrical signal line.

[0025] By adopting the above technical solution, the fast pneumatic reversing valve and the low-speed pneumatic reversing valve are used in combination, making the steering and speed control of the pneumatic motor more precise. The fast reversing valve is suitable for occasions that require quick response, such as emergency shutdown or fast reversing; while the low-speed reversing valve is suitable for occasions that require smooth transition, such as starting, 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 modes of operation:

[0027] Shear removal mode: When the lifting plate needs to be raised, click "Shear removal" on the control panel, the pneumatic motor drives the lifting plate to rise, and the shear removal device releases the shear blade locking cylinder to remove the shear blade;

[0028] Install shear blade mode: When the lifting plate needs to be raised, click "Install shear blade". When the pneumatic motor drives the lifting plate to rise 605mm, jog it up or down to align the shear blade position. When the lifting plate is raised to 635mm, lock the shear blade locking cylinder to complete the installation of the shear blade.

[0029] Lower shear blade installation mode: when the lifting plate needs to be raised, click "Install lower shear blade"; when the pneumatic motor drives the lifting plate to reach 390mm, jog up or down to align the shear blade position; when the lifting plate 1 is raised to 420mm, lock the shear blade locking cylinder to complete the installation of the lower shear blade;

[0030] Failure mode: All operations are completed by jogging. When one circuit fails, the shear blade can be replaced using the other circuit.

[0031] By adopting the above technical solution, the pneumatic motor of the double-sided shear blade changing machine can realize flexible switching and precise control of multiple operation modes, which 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 the enterprise.

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

[0033] Action adjustment: Manually control the lifting and lowering of the empty pallet in the initial position to confirm whether the action is correct and reliable, increase the shear blade load, perform the action in the up and down directions, and adjust the air source pressure to make the pneumatic motor meet the requirements of the shear blade lifting action;

[0034] Hovering function test: The pneumatic motor drives the lifting support plate to hold the shear blade and hover at a certain position to see if it can maintain the original height;

[0035] Function test of the automatic disassembly and assembly mode of the upper and lower shear blades: In the shear blade changing working position, whether each mode can complete its function according to the design requirements, and adjust the relevant programs 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 operations. At the same time, it verifies whether each operating mode can complete its function as designed in the shear blade changing working position, and adjusts the relevant procedures according to actual conditions.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. By replacing the driving mode of the double-sided shear blade changing machine from the original hydraulic motor to the pneumatic motor, the problems of the original hydraulic motor's long procurement cycle, high price, high maintenance cost and short service life are solved. Because the pneumatic motor's appearance and connection dimensions are exactly the same as the original hydraulic motor, there is no need to process additional connectors when replacing it. It can be directly replaced. The reducer and other components do not need to be changed. In addition, its weight is lighter than the original hydraulic motor, and it is easy to replace and install; 2. The pneumatic motor can adjust the pressure and flow rate through the control valve to obtain the required power and speed. The lifting and lowering actions of the disassembly and assembly of the shear blade can realize different working operations except for the part that requires manual confirmation. 1. The pneumatic motor can be controlled by one button to control the lifting and lowering conditions, which reduces the labor intensity and safety of on-site personnel; 2. By installing an external displacement sensor and a control box, the real-time monitoring and control of the lifting pallet position is realized, which improves the automation and intelligence level of the equipment. At the same time, the pneumatic motor supports multiple operation modes, such as shear removal mode, shear blade installation mode, shear blade removal mode and fault mode, making the operation of the equipment more flexible and convenient; 3. When the pneumatic motor is overloaded, due to the compressibility of compressed air, the speed of the motor will automatically reduce or stop, thereby avoiding damage to mechanical parts. This overload protection mechanism extends the service life of the equipment and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0040] Figure 2 It is a schematic diagram of the structure of the shear blade replacement device of the present invention from top view;

[0041] Figure 3 This is a schematic diagram of the original hydraulic motor installation 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 It is a schematic diagram of the structure of the pneumatic motor of the present invention;

[0044] Figure 6 It 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 control principle structure of the pneumatic motor of the present invention;

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

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

[0048] In the figure: 1. lifting pallet; 2. shear blade changing trolley; 3. lifting roller; 4. conveying trolley; 5. conveying roller; 6. frame; 7. original hydraulic motor; 8. electric motor; 9. gear shaft; 10. rack; 11. reducer; 12. pneumatic motor; 13. piston chamber; 14. mounting groove; 15. piston; 16. spring; 17. air inlet; 18. dynamic friction plate; 19. static friction plate; 20. connector; 21. rotating shaft; 22. air control cabinet; 23. air source processing triplet; 24. ball valve; 25. external joint; 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 DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

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

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

[0053] Close the original main air source pipe of the double-sided shear blade changing machine, 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 static pressure guide rail to meet the needs of different plate widths. Each side shear consists of a pinch roller, a body and a shear blade changing device. The two eccentric shafts on the inlet side of the shear drive the upper shear blade to roll along the straight lower shear blade to shear the edge of the steel plate so that the sheared steel plate reaches the required width of the finished product. The third eccentric shaft drives the upper shear blade of the edge shear to move up and down to break the continuous waste edges under the edge shearing so that they can fall smoothly into the chute and be transported out.

[0055] With the cooperation of laser marking, the steel plate to be cut is adjusted by the centering device on the double-sided shear input roller to control the trimming amount on both sides of the steel plate within an appropriate range. During shearing, the pinch rollers clamp the steel plate and intermittently feed the plate in a timely and accurate manner according to the set step length and cycle. In the gap between feeding the plates, the pressing plate device descends to press the steel plate. The shears on the left and right sides shear at the same time, and the sheared waste is transported to the waste basket outside the factory through the waste chute and belt. The above actions are repeated until the trimming of a steel plate is completed. The fixed side shear and the mobile side shear each have their own set of shear blade replacement devices, which are arranged at the rear of their respective shears.

[0056] The shear blade replacement device is mainly composed of a conveying roller table 5, a lifting roller table 3, a conveying trolley 4, a shear blade changing trolley 2 and a lifting support plate 1. When changing the shear blade, the motor 8 drives the conveying trolley 4 to move forward to the top of the shear blade changing trolley 2 through a chain. The shear blade changing trolley 2 carries the lifting support plate 1 to the bottom of the shear blade. The original hydraulic motor 7 drives the lifting support plate 1 to rise to the bottom of the upper shear blade. The installation position of the original hydraulic motor 7 and its original hydraulic motor 7 are as follows: Figure 3 and Figure 4 As shown, the upper shear blade clamping cylinder is released, the lifting support plate 1 driven by the original hydraulic motor 7 is lowered, and the upper shear blade is placed on the conveying trolley 4. The original hydraulic motor 7 drives the lifting support plate 1 to rise below the lower shear blade. The lower shear blade clamping cylinder is released, the lifting support plate 1 driven by the original hydraulic motor 7 is lowered, and the lower shear blade is placed on the conveying trolley 4. The motor 8 drives the conveying trolley 4 to return and place the old shear blade on the lifting roller 3. The lifting roller 3 rises and is manually pushed onto the conveying roller 5 to wait for being lifted away. Then, the new shear blade that has been placed on another row of conveying rollers 5 is manually pushed. The shear blade is pushed onto the lifting roller 3, the lifting roller 3 descends, and the new shear blade is placed on the conveying trolley 4. The motor 8 drives the conveying trolley 4 to move forward to the top of the shear blade changing trolley 2. The original hydraulic motor 7 drives the lifting pallet 1 to lift the new lower shear blade and put it to the installation position on the shearing machine, which is fixed by the clamping cylinder. The lifting pallet 1 drops to the zero position without load. The original hydraulic motor 7 drives the lifting pallet 1 to lift the new upper shear blade and put it to the installation position on the shearing machine, which is fixed by the clamping cylinder. The lifting pallet 1 drops to the zero position, the transport trolley returns to the starting position, the old shear blade is recovered, and the shear blade replacement is completed.

[0057] Remove the original hydraulic motor 7 pipeline assembly and the original hydraulic motor 7, and install the pneumatic motor 12. Figure 5 As shown, the shell 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 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 135 mm, the length from the output end of the connecting shaft to the flange end face is 27.2 mm, and the shaft diameter of the output end of the connecting shaft is 15.85 mm. This design can ensure that its center height is completely consistent with the original hydraulic motor 7, and there is no need to make corresponding changes to the installation dimensions of the original reducer 11 and other components. The rated torque of the pneumatic motor 12 is 1.5-2 times the rated torque of the original hydraulic motor 7.

[0058] The pneumatic motor 12 is a vane-type pneumatic motor with a planetary reduction output. Figure 6 As shown, a piston cavity 13 and a mounting groove 14 connected to the piston cavity 13 are provided on the inner side of the pneumatic motor 12, a piston 15 located on the outer side of the rotating shaft 21 of the pneumatic motor 12 is provided on the inner side of the piston cavity 13, a connecting groove is provided on the side wall of the piston 15, a spring 16 is installed between the connecting groove and the piston cavity 13, an air inlet 17 is provided on the end of the piston cavity 13 away from the connecting groove, a dynamic friction plate 18 located on the inner side of the mounting groove 14 is provided on the outer side of the rotating shaft 21 of the pneumatic motor 12, a connecting piece 20 located on the inner side of the mounting groove 14 is installed on the outer side of the piston 15, and a static friction plate 19 is fixedly connected to the end of the connecting piece 20 away from the piston 15;

[0059] When there is no air source input, the effect of locking the pneumatic motor 12 can be achieved. The friction between the dynamic friction plate 18 and the static friction plate 19 that are in direct contact and pressed against each other is used to transmit the movement and torque of the active plate to the driven plate, and the driven plate is fixed circumferentially, thereby achieving the purpose of braking. The brake is opened by using compressed air, and the pressure energy is converted into mechanical energy through the piston 15 and the cylinder, overcoming the preload of the spring 16 to loosen the dynamic friction plate 18 and the static friction plate 19, so that the contact friction force is lost and returned to zero, thereby solving the problem of the lifting support plate 1 hovering, so that the pneumatic motor 12 can withstand the torque applied to the motor spindle from the outside when it is not in motion and there is no air source input, maintain the original angle, and do not rotate. 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 are removed, and the output end of the connecting shaft of the pneumatic motor 12 is connected to the original coupling 30, and the pneumatic motor 12 is located on the original fixed bracket, and the pneumatic motor is connected and fixed by fixing bolts.

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

[0061] The gas control cabinet 22 is installed within 5m of the original lifting support plate 1. Figure 7 As shown, the air control cabinet 22 is provided with an air source processing triplet 23, a three-position five-way double-electrically controlled 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 air source main valve, the compressed air is processed accordingly by the air source processing triplet 23, so that the moisture, oil and solid impurities in the air source can be removed, and the air source pressure can be adjusted to meet the working needs. Finally, the gas is used as the power to provide mist lubricating oil to the pneumatic components in the pneumatic system to ensure the long life of the pneumatic motor 12. The three-position five-way double-electrically controlled slide valve 28 is selected, and when the reversing valve is not working and the two electromagnets are in a power-off state, the interfaces connected to the pneumatic motor 12 are connected to the atmosphere without pressure, thereby controlling the direction of the motor movement and the start and stop. After the compressed air of each branch exits the pneumatic reversing valve, the one-way throttle valve 27 is used to adjust the movement speed of the pneumatic motor 12.

[0062] The original main air source pipe is provided with a hole with a diameter of 25 mm, and a transition joint is welded on the hole, and the transition joint is connected to the ball valve 24 through a pipeline. The air inlet end of the pneumatic motor 12 is connected with a conversion joint, and the conversion joint is a G3 / 4 articulated conversion joint, and the conversion joint is connected to the external joint 25 through a hose. The exhaust port of the pneumatic motor 12 is installed with a muffler with an interface of G3 / 4, and the muffler can reduce noise pollution;

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

[0064] like Figure 8 As shown, a fast pneumatic reversing valve and a low-speed pneumatic reversing valve are installed on the air control cabinet, and two electromagnet plugs are respectively provided on the fast pneumatic reversing valve and the low-speed pneumatic reversing valve. The four electromagnet plugs are electrically connected to the control box through electrical signal lines, and the control box can be connected to the original electrical signal line.

[0065] The installation positions of the external displacement sensor 29 and the pneumatic motor 12 are as follows: Fig. 9 As shown, the external displacement sensor 29 is installed on the double-sided shearing blade changing machine, and 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 support plate 1 through the mounting bracket, and the fixed end of the external displacement sensor 29 is connected to the original fixed seat through the mounting bracket. The external displacement sensor 29 is added to accurately control the height position of the lifting support plate 1 to prevent safety and equipment accidents.

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

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

[0068] The experiment tests three types: action adjustment: manually control the lifting support plate 1 to move in the up and down directions without load in the initial position to confirm whether the action is correct and reliable, increase the shear blade load, perform up and down operations, adjust the air source pressure, so that the pneumatic motor 12 meets the requirements of the shear blade lifting action; hovering function test: the pneumatic motor 12 drives the lifting support plate 1 to hold the shear blade and hover at a certain position to see whether the original height can be maintained unchanged; upper and lower shear blade automatic disassembly and assembly mode function test: in the shear blade changing working position, whether each mode can complete its function according to the design requirements, and adjust the relevant programs according to the actual situation.

[0069] The pneumatic motor 12 includes at least four modes of operation, the shearing mode: when the lifting support plate 1 is at the lowest end, the external displacement sensor shows that the initial position is 0mm, click "dismantle the shear blade", the fast pneumatic reversing valve is energized, and the pneumatic motor 12 drives the lifting support plate 1 to rise rapidly at 40mm / s. When the lifting support plate 1 stops rising, it maintains a constant height for up to 1 second. At this time, the lifting support plate 1 has contacted the bottom of the shear blade. When the pneumatic motor 12 is overloaded, it will automatically stop without causing mechanical overload damage. The fast pneumatic reversing valve loses power, and the reversing valve is in the deflated middle position. The friction plate keeps the pneumatic motor 12 in its original state and no longer rotates. The lifting support plate 1 is suspended to support the shear blade, and the shear blade locking cylinder is released. Click "dismantle the shear blade" again, the low-speed pneumatic reversing valve is energized, and the pneumatic motor 12 reverses to drive the lifting support plate 1 to descend rapidly at 40mm / s. When the lifting support plate 1 drops to the initial position, the old shear blade is placed on the transport trolley;

[0070] Install shear blade mode: When the lifting support plate 1 is at the lowest end, the external displacement sensor shows that the initial position is 0mm. At this time, the new shear blade has been placed on the transport trolley. Click "Install shear blade", the fast pneumatic reversing valve is energized, and the pneumatic motor 12 drives the lifting support plate 1 to rise rapidly at 40mm / s. When the lifting support plate 1 reaches 585mm, the fast pneumatic reversing valve is energized and de-energized, and the low-speed pneumatic reversing valve is energized. The lifting support plate 1 automatically switches to slowly rising to the 605mm position at a speed of 10mm / s. The low-speed pneumatic reversing valve loses power, and the lifting support plate 1 hovers to support the shear blade. Due to reasons such as the matching accuracy of the mechanical equipment, position deviation may occur or the shear blade locking cylinder may not be aligned with the locking groove. It is necessary to manually check the actual situation at this time. If certain measures need to be taken to adjust the horizontal position of the shear blade, When the shear blade locking cylinder and the locking groove are well aligned, you can use "manual slow rise" and "manual slow descent" to adjust the height of the lifting pallet 1 at a speed of 10mm / s. When the shear blade locking cylinder and the locking groove are confirmed to be aligned, use the "manual slow rise" low-speed pneumatic reversing valve to energize the lifting pallet 1 to slowly rise, so that the locking head of the shear blade locking cylinder is fully stuck in the shear blade locking groove. When the lifting pallet 1 stops rising, it means that the shear blade has been raised to the right position. At this time, the height of the lifting pallet 1 should be 635mm. Lock the shear blade locking cylinder, click "Install the upper shear blade" again, and energize the fast pneumatic reversing valve. The pneumatic motor 12 reverses to drive the lifting pallet 1 to descend rapidly at 40mm / s. When the lifting pallet 1 drops to the initial position, the fast pneumatic reversing valve loses power, and the lifting pallet 1 hovers at the 0mm position;

[0071] Install lower shear blade mode: When the lifting support plate 1 is at the lowest end, the external displacement sensor shows that the initial position is 0mm. At this time, the new shear blade has been placed on the transport trolley. Click "Install lower shear blade", the fast pneumatic reversing valve is energized, and the pneumatic motor 12 drives the lifting support plate 1 to rise rapidly at 40mm / s. When the lifting support plate 1 reaches 370mm, the fast pneumatic reversing valve loses power, and the low-speed pneumatic reversing valve is energized. The lifting support plate 1 automatically switches to slowly rising to the 390mm position at a speed of 10mm / s. The low-speed pneumatic reversing valve loses power, and the lifting support plate 1 hovers to support the shear blade. Due to the matching accuracy of the mechanical equipment and other reasons, position deviation may occur or the shear blade locking cylinder is not aligned with the locking groove. It is necessary to manually check the actual situation at this time. If certain measures are needed to adjust the horizontal position of the shear blade, When the shear blade locking cylinder and the locking groove are well aligned, you can use "manual slow rise" and "manual slow descent" to adjust the height of the lifting pallet 1 at a speed of 10mm / s. When the shear blade locking cylinder and the locking groove are confirmed to be aligned, use the "manual slow rise" low-speed pneumatic reversing valve to energize the lifting pallet 1 to slowly rise, so that the locking head of the shear blade locking cylinder is fully stuck in the shear blade locking groove. When the lifting pallet 1 stops rising, it means that the shear blade has been raised to the right position. At this time, the height of the lifting pallet 1 should be 420mm. Lock the shear blade locking cylinder, click "Install lower shear blade" again, and energize the fast pneumatic reversing valve. The pneumatic motor 12 reverses to drive the lifting pallet 1 to descend rapidly at 40mm / s. When the lifting pallet 1 drops to the initial position, the fast pneumatic reversing valve loses power, and the lifting pallet 1 hovers at the 0mm position;

[0072] Failure mode: When the slow branch fails, the fast branch is used to complete the shear blade replacement work of the full stroke. The "manual fast rise" fast pneumatic reversing valve can be energized, and the "manual fast descent" fast pneumatic reversing valve can be energized to control the lifting and lowering of the lifting support plate 1. 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 fails, the slow branch is used to complete the full-stroke shear blade replacement work. The "manual slow rise" low-speed pneumatic reversing valve can be energized, and the "manual slow descent" low-speed pneumatic reversing valve can be energized to control the lifting and lowering of the lifting support plate 1. At this time, the two one-way throttle valves 03.3 and 03.4 27 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 present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for installing a pneumatic motor of a double-sided shearing blade changing machine, characterized in that: The following steps are involved: Prepare pneumatic motor, pneumatic control cabinet, external displacement sensor, control box and required connecting pipes; Close the original main air source pipe of the double-sided shear blade changing machine, close the ball valve of the original hydraulic motor and disconnect the original electrical signal line; Dismantle the original hydraulic motor pipeline assembly and its original hydraulic motor, and install the pneumatic motor; Install the air control cabinet, connect the air inlet end of the air control cabinet to the main air source pipe, and connect the air inlet end of the pneumatic motor to the air control cabinet; Connect the original electrical signal line to the control box; Installing the external displacement sensor on the double-sided shearing blade changing machine; Edit the program, check the installation effect, open the main gas source pipe, and adjust the gas source pressure on the gas control cabinet; The double-sided shear blade changing machine was experimentally tested. After the experimental test was successful, it was confirmed that the pneumatic motor was installed and put into use.

2. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The shell 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 the rated torque of the original hydraulic motor.

3. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The pneumatic motor is a vane-type pneumatic motor, and a piston cavity and a mounting groove connected to the piston cavity are provided on the inner side of the pneumatic motor; a piston located on the outer side of the rotating shaft of the pneumatic motor is provided on the inner side of the piston cavity; a connecting groove is provided on the side wall of the piston; a spring is installed between the connecting groove and the piston cavity; an air inlet is provided on the end of the piston cavity away from the connecting groove; a dynamic friction plate located on the inner side of the mounting groove is provided on the outer side of the rotating shaft of the pneumatic motor; a connecting piece located on the inner side of 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.

4. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: 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 are removed, the output end of the pneumatic motor connecting shaft is connected to the original coupling, and the pneumatic motor is located on the original fixed bracket, and the pneumatic motor is connected and fixed by fixing bolts.

5. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The external displacement sensor is connected via a mounting bracket, the movable end of the external displacement sensor is connected to the original lifting support plate via the mounting bracket, and the fixed end of the external displacement sensor is connected to the original fixing seat via the mounting bracket.

6. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The air control cabinet is installed within 5m of the original lifting support plate. The air control cabinet is provided with an air source processing triplet, a three-position five-way double electric control slide valve, a one-way throttle valve, a ball valve, a shuttle valve and an external joint. A hole with a diameter of 25mm is opened on the original main air source pipe, and a transition joint is welded on the hole. The transition joint is connected to the ball valve through a pipeline. The air inlet end of the pneumatic motor is connected to a conversion joint, and the conversion joint is connected to the external joint through a hose.

7. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The air control cabinet is equipped with a fast pneumatic reversing valve and a low-speed pneumatic reversing valve. The fast pneumatic reversing valve and the low-speed pneumatic reversing valve are respectively provided with two electromagnet plugs. The four electromagnet plugs are electrically connected to the control box through electrical signal lines, and the control box can be connected to the original electrical signal line.

8. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The pneumatic motor includes at least four modes of operation: Shear removal mode: When the lifting plate needs to be raised, click "Shear removal" on the control panel, the pneumatic motor drives the lifting plate to rise, and the shear removal device releases the shear blade locking cylinder to remove the shear blade; Install shear blade mode: When the lifting plate needs to be raised, click "Install shear blade". When the pneumatic motor drives the lifting plate to rise 605mm, jog up or down to align the shear blade position. When the lifting plate is raised to 635mm, lock the shear blade locking cylinder to complete the installation of the shear blade. Install lower shear blade mode: When the lifting plate needs to be raised, click "Install lower shear blade"; when the pneumatic motor drives the lifting plate to reach 390mm, jog up or down to align the shear blade position; when the lifting plate 1 is raised to 420mm, lock the shear blade locking cylinder to complete the installation of the lower shear blade; Failure mode: All operations are completed by jogging. When one circuit fails, the shear blade can be replaced using the other circuit.

9. The method for installing a pneumatic motor of a double-sided shearing blade changing machine according to claim 1, characterized in that: The experimental tests include at least three types: Action adjustment: Manually control the lifting and lowering of the empty pallet in the initial position to confirm whether the action is correct and reliable, increase the shear blade load, perform the action in the up and down directions, and adjust the air source pressure to make the pneumatic motor meet the requirements of the shear blade lifting action; Hovering function test: The pneumatic motor drives the lifting support plate to hold the shear blade and hover at a certain position to see if it can maintain the original height; Function test of the automatic disassembly and assembly mode of the upper and lower shear blades: In the shear blade changing working position, whether each mode can complete its function according to the design requirements, and adjust the relevant programs according to the actual situation.

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