A roller pressing device and method for a hydraulic support cylinder

Abstract

The present invention aims at the drawback that the amount of cladding layer removed during the rough machining of the CMT cladding copper alloy cladding layer in the prior art is too large, resulting in material waste, and provides a roller pressing device and method for a hydraulic support cylinder that saves materials and effectively reduces machining allowance. It belongs to the field of coal mine machinery. It includes a rotating shaft, one end of the rotating shaft is connected to a transfer unit, the outside of the transfer unit is connected to a rotating motor A, the tops of both ends of the transfer unit are provided with a Y-shaped transmission bracket, each of the ends of the Y-shaped transmission bracket is provided with a bearing, and a cylindrical rotating roller is installed between the bearings; the other end of the rotating shaft is connected to a chuck, the outside of the chuck is provided with a rotating motor B and a rotating unit, the rotating unit is installed on the rotating shaft, and the rotating motor B is connected to the rotating unit in a transmission manner. The device can cause plastic deformation on the surface of the cladding layer and reduce the machining allowance from 1~2mm to 0.2~0.5mm. It effectively reduces the machining allowance and saves welding materials.

Description

Technical Field

[0001] The invention belongs to the field of coal mine machinery, and in particular relates to a rolling device and method for a hydraulic support cylinder. Background Art

[0002] The repair of the inner wall of the hydraulic support cylinder belongs to the inner hole repair, which is similar to the processes of gas shielded welding and surfacing welding. It has the disadvantage of large heat input, which causes the repaired cylinder to be scrapped due to large thermal deformation and cannot be used anymore. Therefore, the publication number is CN110142576A, and the patent name is a hydraulic support cylinder remanufacturing method based on CMT, which provides a method of welding the inner wall of the hydraulic support cylinder using cold metal transition welding technology. During the welding process, there is less heat input and less spatter, which can ensure that the remanufactured cylinder will not fail due to thermal deformation and improve the service life of the cylinder. However, in the above invention, after CMT welding is performed on the inner wall of the hydraulic support cylinder, the CMT weld layer needs to be machined, and the total amount of machining can reach 1~2mm. Due to the ups and downs of the surface of the surfacing layer, the removal amount of the rough-machined cladding layer can often reach 75%~80% of the total machining amount, resulting in great material waste, increasing costs, and reducing production efficiency. Summary of the invention

[0003] Aiming at the drawback that excessive removal of cladding layer during rough machining of CMT cladding copper alloy cladding layer in the prior art causes material waste, the present invention provides a rolling device and method for a hydraulic support cylinder which saves materials and effectively reduces machining allowance.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A rolling device for a hydraulic support cylinder comprises a rotating shaft, which is a threaded screw; one end of the rotating shaft is connected to a transfer unit, and a rotating motor A is detachably fixedly connected to the outside of the transfer unit by bolts; a gear A is arranged inside the transfer unit, and the gear A is connected to the motor shaft of the rotating motor A; a rack is fixedly connected to each side of the gear A, a V-shaped bracket is fixedly connected to the top of one end of the rack, the V-shaped bracket and the rack constitute a Y-shaped transmission bracket, the end of the V-shaped bracket is parallel to the rack, a bearing is arranged on each side of the end of the V-shaped bracket, and a cylindrical rotating roller is installed between the bearings; the other end of the rotating shaft is connected to a chuck, and a rotating motor B and a rotating unit are installed on the outside of the chuck, the rotating motor B is detachably fixedly connected to the chuck by bolts, the rotating unit is installed on the rotating shaft, and the rotating motor B is transmission-connected to the rotating unit.

[0006] In the above scheme, the rotating motor B drives the rotating shaft to move axially and rotate radially through the rotating unit, the rotating shaft drives the transmission bracket to rotate radially through the adapter unit, and the rotating motor A realizes the radial expansion and contraction of the transmission bracket through the rack of the transmission bracket. The present invention uses the rolling principle to apply pressure to the CMT cladding copper alloy cladding layer, so that the surface of the cladding layer produces plastic deformation to achieve the purpose of pressing peaks and valleys. The machining allowance after the rotating roller is only 0.2~0.5mm, which effectively reduces the machining allowance and saves welding materials. In addition, the transmission bracket can be radially expanded and contracted to adapt to hydraulic support cylinders of different apertures, has good versatility, and can improve production efficiency.

[0007] Preferably, a through hole is provided at the center of the adapter unit, and the rotating shaft passes through the through hole of the adapter unit and is connected to the adapter unit by interference fit. The interference fit can obtain a tight connection so that the rotating shaft and the adapter unit have no relative movement.

[0008] Preferably, the transmission bracket and the outer diameter of the bearing, and the inner diameter of the bearing and the rotating roller are all interference fit without relative movement.

[0009] Preferably, the chuck is a three-jaw chuck, and the chuck body is circular. The chuck can clamp the hydraulic support cylinder on the outer diameter of the hydraulic support cylinder by a rolling device to ensure the coaxiality of the device and the hydraulic support cylinder. The circular chuck body can be well matched with the shape of the hydraulic support cylinder.

[0010] Preferably, a threaded through hole is provided at the center of the chuck, and the rotating shaft passes through the threaded through hole of the chuck and is threadedly connected to the chuck. The threaded through hole allows the rotating shaft to move back and forth along the axial direction of the rotating shaft under the action of the rotating motor B.

[0011] Preferably, the motor shaft of the rotating motor A is connected to the gear A via a key.

[0012] Preferably, the bearing is a commercially available standard bearing, and the rotary motor A and the rotary motor B are commercially available standard stepper motors. The main components are all standard components on the market, which are highly versatile and cost-saving.

[0013] A method for rough machining and rolling of a copper alloy cladding layer on the inner wall of a hydraulic support cylinder comprises the following steps:

[0014] Step 1, start the rotating motor B, adjust the length of the rotating shaft, and make the distance from the chuck to the rotating roller less than or equal to the length of the hydraulic support cylinder to be rolled;

[0015] Step 2, start the rotating motor A, adjust the diameter of the rotating roller, the diameter of the rotating roller is smaller than the inner wall diameter of the hydraulic support cylinder to be rolled, so as to facilitate the rotating roller to be placed in the hydraulic support cylinder.

[0016] Step 3, extend the roller pressing device into the hydraulic support cylinder until it reaches the bottom;

[0017] Step 4: Clamp the outer diameter of the hydraulic support cylinder with the chuck and tighten it for fixation.

[0018] Step 5: Adjust the diameter of the rotating roller so that it is in full contact with the inner wall of the hydraulic support cylinder and apply pressure to the inner wall of the cylinder.

[0019] Step 6: Start the rotating motor B, determine the axial stroke of the rotating shaft, ensure that the rotating roller reciprocates between the bottom and the opening of the hydraulic support cylinder; ensure that the rotating roller can roll most areas of the inner wall of the hydraulic support cylinder.

[0020] Step 7: Start the rotating motor B to make the rotating roller perform axial reciprocating motion and radial rotating motion between the bottom and the opening of the hydraulic support cylinder. This causes plastic deformation on the surface of the cladding layer to achieve the purpose of pressing down peaks and filling valleys. After being roll-pressed by the rotating roller, the machining allowance is only 0.2 - 0.5 mm, effectively reducing the machining allowance and saving welding materials.

[0021] Preferably, after the rotating roller is in full contact with the inner wall of the hydraulic support cylinder in Step 5, the rotating motor A is in a locked state. Fix the transmission bracket so that it will not shrink due to the force on the rotating roller.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By using the roll-pressing principle, pressure is applied to the CMT cladding weld layer, causing plastic deformation on the surface of the cladding layer, and reducing the machining allowance from 1 - 2 mm to 0.2 - 0.5 mm. It effectively reduces the machining allowance and saves welding materials; and it can adapt to hydraulic support cylinders with different apertures, having good versatility; the main components are all commercially available standard parts, which can save a significant amount of cost for both the production and maintenance of this device. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the roll-pressing device for the hydraulic support cylinder;

[0025] Figure 2 It is a schematic diagram of the structure of the rack of the transmission bracket and the gear A on the rotating motor A;

[0026] Figure 3 It is a schematic diagram of the use of the roll-pressing device for the hydraulic support cylinder installed on the cylinder;

[0027] Figure 4 It is a schematic diagram of the overall structure of the roll-pressing device for the hydraulic support cylinder in Embodiment 2;

[0028] Figure 5 It is a schematic diagram of the connection structure between the rotating motor B and the rotating shaft in Embodiment 2;

[0029] Figure 6This is a schematic diagram of the overall structure of the rolling device for the hydraulic support cylinder of Example 3.

[0030] Markings in the figure: 1, rotating shaft; 2, rotating motor A; 21, gear A; 3, adapter unit; 4, transmission bracket; 41, rack; 5, bearing; 6, rotating roller; 7, chuck; 8, rotating motor B;

[0031] 81. Gear B; 9. Rotation unit; 10. Hydraulic support cylinder; 11. Guide rail. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0033] Example 1

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, a rolling device for a hydraulic support cylinder includes a rotating shaft 1, which is a threaded screw; one end of the rotating shaft 1 is connected to an adapter unit 3, and a through hole is provided in the center of the adapter unit 3. The rotating shaft 1 passes through the through hole of the adapter unit 3 and is connected to the adapter unit 3 by interference fit. The outer side of the adapter unit 3 is detachably fixedly connected to a rotating motor A2 by bolts, and a gear A21 is provided inside the adapter unit 3, and the gear A21 is connected to the motor shaft of the rotating motor A2. A rack 41 is fixedly connected to each side of the gear A21, and a V-shaped bracket is fixedly connected to the top of one end of the rack 41. The V-shaped bracket and the rack 41 constitute a Y-shaped transmission bracket 4, and the end of the V-shaped bracket is parallel to the rack 41. A bearing 5 is provided on each side of the end of the V-shaped bracket, and a cylindrical rotating roller 6 is installed between the bearings 5. The transmission bracket 4 is connected to the outer diameter of the bearing 5, and the inner diameter of the bearing 5 is connected to the rotating roller 6 by interference fit. The rotating motor A2 can drive the rack 41 of the transmission support 4 to extend and retract radially back and forth through the gear A21, so as to adjust the rotating diameter of the rotating roller 6 to adapt to the hydraulic support cylinders 10 of different diameters.

[0035] The other end of the rotating shaft 1 is connected with a chuck 7. The chuck 7 is a three-jaw chuck 7, the chuck body is circular, and a threaded through hole is provided at the center of the chuck 7. The rotating shaft 1 passes through the threaded through hole of the chuck 7 and is threadedly connected with the chuck 7. The chuck 7 can clamp the roll pressing device for the hydraulic support cylinder on the outer diameter of the hydraulic support cylinder 10 to ensure the coaxiality between the device and the hydraulic support cylinder 10. The circular chuck body can well fit the shape of the hydraulic support cylinder 10. The threaded through hole at the center of the chuck 7 allows the rotating shaft 1 to move back and forth along the axial direction of the rotating shaft 1 under the action of the rotating motor B8. A rotating motor B8 and a rotating unit 9 are installed on the outer side of the chuck 7. The rotating motor B8 is detachably and fixedly connected with the chuck 7 through bolts. The rotating unit 9 is installed on the rotating shaft 1, and the rotating motor B8 is in transmission connection with the rotating unit 9. In this embodiment, the rotating unit is a worm and worm gear reducer. The worm and worm gear reducer and the rotating shaft are combined into a worm screw lift, and the axial movement and radial rotation movement of the rotating shaft are driven by using the worm and worm gear principle.

[0036] The rough machining roll pressing method for the copper alloy cladding layer on the inner wall of the hydraulic support cylinder by using the above device specifically includes the following steps:

[0037] Step 1: Start the rotating motor B8, adjust the length of the rotating shaft 1, and make the distance from the chuck 7 to the rotating roll 6 less than or equal to the length of the hydraulic support cylinder 10 to be roll pressed.

[0038] Step 2: Start the rotating motor A2, adjust the diameter of the rotating roll 6, and make the diameter of the rotating roll 6 less than the inner wall diameter of the hydraulic support cylinder 10 to be roll pressed; this is convenient for the rotating roll 6 to be put into the hydraulic support cylinder 10.

[0039] Step 3: Insert the roll pressing device into the hydraulic support cylinder 10 until it reaches the bottom.

[0040] Step 4: Clamp the outer diameter of the hydraulic support cylinder 10 with the chuck 7 and tighten and fix it.

[0041] Step 5: Adjust the diameter of the rotating roll 6 to make the rotating roll 6 fully contact with the inner wall of the hydraulic support cylinder 10 and apply pressure to the inner wall of the cylinder; after the diameter of the rotating roll 6 is adjusted, the rotating motor A2 is in a locked state. Fix the transmission bracket 4 so that it will not shrink due to the force on the rotating roll 6.

[0042] Step 6: Start the rotating motor B8, determine the axial stroke of the rotating shaft 1, and ensure that the rotating roll 6 reciprocates between the bottom and the mouth of the hydraulic support cylinder 10; ensure that the rotating roll 6 can roll press most areas of the inner wall of the hydraulic support cylinder 10.

[0043] Step 7: Start the rotating motor B8 to make the rotating roll 6 perform axial reciprocating motion and radial rotation motion between the bottom and the mouth of the hydraulic support cylinder 10.

[0044] Embodiment 2

[0045] As Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, a rolling device for a hydraulic support cylinder includes a rotating shaft 1, and the rotating shaft 1 is a threaded screw rod; one end of the rotating shaft 1 is connected with a transfer unit 3. A through hole is provided in the center of the transfer unit 3, and the rotating shaft 1 passes through the through hole of the transfer unit 3 and is connected with the transfer unit 3 by interference fit. The outside of the transfer unit 3 is detachably and fixedly connected with a rotating motor A2 by bolts. A gear A21 is provided inside the transfer unit 3, and the gear A21 is connected to the motor shaft of the rotating motor A2. One rack 41 is fixedly connected to each side of the gear A21. One end of the rack 41 is fixedly connected with a V-shaped bracket at the top. The V-shaped bracket and the rack 41 form a Y-shaped transmission bracket 4. The end of the V-shaped bracket is parallel to the rack 41. One bearing 5 is provided on each side of the end of the V-shaped bracket. A cylindrical rotating roller 6 is installed between the bearings 5. The transmission bracket 4 and the outer diameter of the bearing 5, and the inner diameter of the bearing 5 and the rotating roller 6 are all connected by interference fit. The rotating motor A2 can drive the rack 41 of the transmission bracket 4 to radially move back and forth through the gear A21, so as to adjust the rotating diameter of the rotating roller 6 to adapt to hydraulic support cylinders 10 with different diameters.

[0046] The other end of the rotating shaft 1 is connected with a chuck 7. The chuck 7 is a three-jaw chuck 7, the chuck body is circular, and a threaded through hole is provided in the center of the chuck 7. The rotating shaft 1 passes through the threaded through hole of the chuck 7 and is threadedly connected with the chuck 7. The chuck 7 can clamp the rolling device for the hydraulic support cylinder on the outer diameter of the hydraulic support cylinder 10 to ensure the coaxiality of the device and the hydraulic support cylinder 10. The circular chuck body can fit well with the shape of the hydraulic support cylinder 10. The threaded through hole in the center of the chuck 7 allows the rotating shaft 1 to move back and forth along the axial direction of the rotating shaft 1 under the action of the rotating motor B8. A rotating motor B8 is installed outside the chuck 7. The rotating motor B8 is detachably and fixedly connected with the chuck 7 by bolts. A gear B81 is connected to the motor shaft of the rotating motor B8, and the gear B81 meshes with the thread on the rotating shaft 1. The rotating motor B8 drives the rotating shaft 1 to move axially and rotate radially through the gear B81.

[0047] The usage method of the above device is the same as that of Embodiment 1 and will not be repeated here.

[0048] Embodiment 3

[0049] As Figure 2 , Figure 3 , Figure 6As shown in the figure, a rolling device for a hydraulic support cylinder includes a rotating shaft 1, and the rotating shaft 1 is a threaded screw rod; one end of the rotating shaft 1 is connected with a transfer unit 3, and a through hole is provided in the center of the transfer unit 3. The rotating shaft 1 passes through the through hole of the transfer unit 3 and is connected with the transfer unit 3 by interference fit. The outside of the transfer unit 3 is detachably and fixedly connected with a rotating motor A2 by bolts. A gear A21 is provided inside the transfer unit 3, and the gear A21 is connected to the motor shaft of the rotating motor A2. One rack 41 is fixedly connected to each side of the gear A21. One end of the rack 41 is fixedly connected with a V-shaped bracket at the top. The V-shaped bracket and the rack 41 form a Y-shaped transmission bracket 4. The end of the V-shaped bracket is parallel to the rack 41. One bearing 5 is provided on each side of the end of the V-shaped bracket. A cylindrical rotating roller 6 is installed between the bearings 5. The transmission bracket 4 and the outer diameter of the bearing 5, the inner diameter of the bearing 5 and the rotating roller 6 are all connected by interference fit. The rotating motor A2 can drive the rack 41 of the transmission bracket 4 to radially move back and forth through the gear A21, so as to adjust the rotating diameter of the rotating roller 6 to adapt to hydraulic support cylinders 10 with different diameters.

[0050] The other end of the rotating shaft 1 is connected with a chuck 7. The chuck 7 is a three-jaw chuck 7, the chuck body is circular, and a threaded through hole is provided in the center of the chuck 7. The rotating shaft 1 passes through the threaded through hole of the chuck 7 and is threadedly connected with the chuck 7. The chuck 7 can clamp the rolling device for the hydraulic support cylinder on the outer diameter of the hydraulic support cylinder 10 to ensure the coaxiality of the device and the hydraulic support cylinder 10. The circular chuck body can well fit the shape of the hydraulic support cylinder 10. The threaded through hole in the center of the chuck 7 allows the rotating shaft 1 to move back and forth along the axis of the rotating shaft 1 under the action of the rotating motor B8. Guide rails 11 are respectively installed at the upper and lower ends outside the chuck 7. The rotating motor B8 is installed between the two guide rails 11. The motor shaft of the rotating motor B8 is connected with the end of the rotating shaft 1 through a coupling. The rotating motor B8 drives the rotating shaft 1 to rotate, and the rotating shaft 1 realizes axial reciprocating motion through the threaded through hole in the center of the chuck 7. When the rotating shaft 1 moves axially, it will drive the rotating motor B8 to move axially together. The length of the guide rail 11 is greater than or equal to the length of the rotating shaft 1.

[0051] The usage method of the above device is the same as that of Embodiment 1 and will not be repeated here.

[0052] The specific embodiments described in the text are only examples to illustrate the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A rough machining roll pressing method for a copper alloy clad layer on the inner wall of a hydraulic support cylinder, using a roll pressing device for a hydraulic support cylinder. The roll pressing device for a hydraulic support cylinder includes a rotating shaft (1), and is characterized in that, The rotating shaft (1) is a threaded lead screw; one end of the rotating shaft (1) is connected with a transfer unit (3), and a rotating motor A (2) is detachably and fixedly connected to the outside of the transfer unit (3) by bolts. A gear A (21) is arranged inside the transfer unit (3), and the gear A (21) is connected to the motor shaft of the rotating motor A (2). One rack (41) is meshed and connected to each side of the gear A (21). A V-shaped bracket is fixedly connected to the top of one end of the rack (41). The V-shaped bracket and the rack (41) form a Y-shaped transmission bracket (4). The end of the V-shaped bracket is parallel to the rack (41). One bearing (5) is arranged on each side of the end of the V-shaped bracket. A cylindrical rotating roller (6) is installed between the bearings (5); the other end of the rotating shaft (1) is connected with a chuck (7). A rotating motor B (8) and a rotating unit (9) are installed on the outside of the chuck (7). The rotating motor B (8) is detachably and fixedly connected to the chuck (7) by bolts. The rotating unit (9) is installed on the rotating shaft (1), and the rotating motor B (8) is in transmission connection with the rotating unit (9); The chuck (7) is a three-jaw chuck (7), and the chuck body is circular; A threaded through hole is arranged at the center of the chuck (7), and the rotating shaft (1) passes through the threaded through hole of the chuck (7) and is in threaded connection with the chuck (7); It includes the following steps: Step 1: Start the rotating motor B (8), adjust the length of the rotating shaft (1), and make the distance from the chuck (7) to the rotating roller (6) less than or equal to the length of the hydraulic support cylinder (10) to be roll-pressed; Step 2: Start the rotating motor A (2), and adjust the distance between the contact positions of the two rotating rollers (6) with the inner wall of the hydraulic support cylinder respectively. This distance is less than the inner diameter of the hydraulic support cylinder (10) to be roll-pressed; Step 3: Insert the roll-pressing device into the hydraulic support cylinder (10) until it reaches the bottom; Step 4: Clamp the outer diameter of the hydraulic support cylinder (10) with the chuck (7) and tighten and fix it; Step 5: Adjust the diameter of the rotating roller (6) to make the rotating roller (6) fully contact with the inner wall of the hydraulic support cylinder (10), and apply pressure to the inner wall of the cylinder; Step 6: Start the rotating motor B (8), determine the axial stroke of the rotating shaft (1), and ensure that the rotating roller (6) reciprocates between the bottom and the opening of the hydraulic support cylinder (10); Step 7: Start the rotating motor B (8) to make the rotating roller (6) perform axial reciprocating motion and radial rotating motion between the bottom and the opening of the hydraulic support cylinder (10); After the rotating roller (6) fully contacts with the inner wall of the hydraulic support cylinder (10) in Step 5, the rotating motor A (2) is in a locked state.

2. The rough machining roll pressing method for the copper alloy clad layer on the inner wall of the hydraulic support cylinder according to claim 1, characterized in that A through hole is arranged at the center of the transfer unit (3), and the rotating shaft (1) passes through the through hole of the transfer unit (3) and is in interference fit connection with the transfer unit (3).

3. The rough machining roll pressing method for the copper alloy cladding layer on the inner wall of the hydraulic support cylinder according to claim 1, characterized in that The outer diameter of the transmission bracket (4) and the bearing (5), and the inner diameter of the bearing (5) and the rotating roller (6) are all in interference fit.

4. The rough machining roll pressing method for the copper alloy cladding layer on the inner wall of the hydraulic support cylinder according to claim 1, characterized in that The motor shaft of the rotating motor A (2) is connected with the gear A (21) by a key.

5. The rough machining roll pressing method for the copper alloy clad layer on the inner wall of the hydraulic support cylinder according to claim 1 or 4, characterized in that The bearing (5) is a commercially available standard bearing, and the rotary motors A (2) and B (8) are commercially available standard stepping motors.

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