A large cylindrical part boring tool and its use method

Abstract

The present invention discloses a large-scale cylindrical part boring tool and a method for using the same, the large-scale cylindrical part boring tool comprising: two relatively arranged support frames, the top ends of the support frames being relatively fixedly connected to two coarse clamping structures, two bottom clamping structures being relatively arranged between the two support frames, two top clamping structures being relatively arranged above the two bottom clamping structures, the top clamping structures matching the corresponding bottom clamping structures; the present invention arranges the bottom clamping structure to cooperate with the top clamping structure, utilizes the bottom limit rope and the top limit rope to wrap around the cylindrical body for one circle each, so that the clamping force of the workpiece can be converted into a circumferentially uniformly distributed force system, which can greatly reduce clamping deformation and improve clamping stability. At the same time, since the winding work is completed by the bottom clamping structure and the top clamping structure, the difficulty of winding the bottom limit rope and the top limit rope onto the cylindrical body is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a large cylindrical part boring tool and a use method thereof. Background Art

[0002] Long cylindrical thin-walled parts have weak rigidity. When using traditional chuck jaws for radial clamping, large clamping deformation is likely to occur, which cannot meet the processing accuracy requirements. Therefore, it is necessary to design a tooling specifically for boring cylindrical parts.

[0003] Publication No. CN113798547A discloses a method for clamping thin-walled, long cylindrical parts during boring. This method uses a flexible rope combined with an arc-shaped support to convert the workpiece's clamping force into a uniformly distributed force system along the circumference, significantly reducing clamping deformation and improving clamping stability.

[0004] However, in the above patent, the flexible rope needs to be wrapped around the workpiece 1.5 times in a circumferential direction when in use, and there is no structure designed for winding the flexible rope. Therefore, the larger the size of the cylindrical part, the more difficult it is to wind the flexible rope. Summary of the Invention

[0005] The present invention addresses the problem that the existing technology does not have a structure designed for winding flexible ropes. Therefore, the larger the size of the cylindrical part, the more difficult it is to wind the flexible rope. The present invention proposes the following technical solutions:

[0006] A boring tool for large cylindrical parts includes: two oppositely arranged support frames, two coarse clamping structures are relatively fixedly connected to the top ends of the support frames, two bottom clamping structures are relatively arranged between the two support frames, and two top clamping structures are relatively arranged above the two bottom clamping structures, and the top clamping structures match the corresponding bottom clamping structures.

[0007] The present invention provides a rough clamping structure on the support frame for preliminary limiting of the cylinder, and provides a bottom clamping structure for cooperation with a top clamping structure. The bottom limit rope and the top limit rope are used to wrap around the cylinder for one circle each, so that the clamping force of the workpiece can be converted into a circumferentially uniformly distributed force system, which can greatly reduce the clamping deformation and improve the clamping stability. At the same time, since the winding work is completed by the bottom clamping structure and the top clamping structure, the difficulty of winding the bottom limit rope and the top limit rope onto the cylinder is greatly reduced.

[0008] As a preference of the above technical solution, the rough clamping structure includes a rough clamping frame. Between the two side edges of the inner wall of the rough clamping frame, two rough rollers are installed. One of the rough rollers is rotatably connected to the rough clamping frame, and a volute spring is installed at the connection between it and the rough clamping frame. The other rough roller is fixedly connected to the rough clamping frame. One side of the rough clamping frame is fixedly connected with a cylinder. The output end of the cylinder penetrates through the rough clamping frame and extends into the interior of the rough clamping frame, and the end thereof is fixedly connected with a fine roller frame. A clamping belt is fixedly wound around one of the rough rollers. One end of the clamping belt is wound around the fine roller frame and then fixedly connected to the other rough roller.

[0009] After the cylinder body is placed on the placement rack in the present invention, the cylinder is started. The cylinder drives the fine roller frame to move, so that the fine roller frame pulls the clamping belt to tightly adhere to the outer wall of the cylinder body. At this time, since the clamping belt is pulled, the corresponding rough roller rotates, causing the volute spring to wind up and become tight. Using the reaction force of the volute spring, the clamping belt is tightened to provide a clamping force on the outer wall of the cylinder body.

[0010] As a preference of the above technical solution, the shape of the fine roller frame is in a shape of a square bracket, and rotating rollers are rotatably sleeved at both ends of the fine roller frame.

[0011] The shape of the fine roller frame of the present invention is in a shape of a square bracket. Therefore, when the cylinder body closely adheres to the clamping belt, the arc surface of the cylinder body will squeeze the clamping belt towards the inside of the fine roller frame, so that the clamping belt remains in close contact with the cylinder body. At the same time, rotating rollers are rotatably sleeved at both ends of the fine roller frame, which is convenient for the clamping belt to be pulled.

[0012] As a preference of the above technical solution, the bottom clamping structure includes a bottom frame. A bottom drive belt structure is installed at the top end of the bottom frame. One end of the bottom drive belt structure penetrates through the bottom frame, and the end thereof is fixedly connected with a bottom motor. The other end of the bottom drive belt structure penetrates through the bottom frame, and the end thereof is fixedly connected with a bottom drive bevel gear. One end of the bottom drive bevel gear is meshed with a bottom double-headed bevel gear. One end of the bottom double-headed bevel gear is meshed with a bottom telescopic bevel gear. One end of the bottom telescopic bevel gear is fixedly connected with a bottom threaded telescopic rod. One end of the bottom threaded telescopic rod penetrates through the bottom frame and extends to the outside.

[0013] When the present invention is used, the bottom motor is started to drive the bottom drive belt structure to move, thereby driving two corresponding fixed blocks to move alternately. At the same time, the movement of the bottom drive belt structure drives the bottom drive bevel gear, and then sequentially drives the bottom double-headed bevel gear and the bottom telescopic bevel gear to rotate, so that the bottom threaded telescopic rod retracts into the bottom frame and no longer hangs on the middle part of the top limit rope.

[0014] As a preferred embodiment of the above technical solution, the top clamping structure includes a top frame, a top transmission belt structure is installed at the bottom end of the top frame, one end of the top transmission belt structure is inserted into the interior of the top frame, and its end is fixedly connected to the top motor, the other end of the top transmission belt structure is inserted into the interior of the top frame, and its end is fixedly connected to the top drive bevel gear, one end of the top drive bevel gear is meshed and connected with the top double-headed bevel gear, one end of the top double-headed bevel gear is meshed and connected with the top telescopic bevel gear, one end of the top telescopic bevel gear is fixedly connected with the top threaded telescopic rod, one end of the top threaded telescopic rod is inserted into the top frame and extends to the outside, and the top of the top frame is fixedly connected to the hydraulic lifting rod group.

[0015] When the present invention is in use, the top motor starts to drive the top transmission belt structure to move, which in turn drives the two corresponding fixed blocks to move alternately. At the same time, the movement of the top transmission belt structure drives the top drive bevel gear, which in turn drives the top double-headed bevel gear and the top telescopic bevel gear to rotate, so that the top threaded telescopic rod retracts into the top frame and no longer hangs on the middle part of the bottom limit rope.

[0016] As a preferred embodiment of the above technical solution, the bottom transmission belt structure and the top transmission belt structure both include two movable rollers, the outer sides of the two movable rollers are sleeved with transmission belts, both ends of the transmission belts are rotated to fit the limiting rollers, both sides of the transmission belts are fixedly connected with fixed blocks, and the inner side of the transmission belt is provided with a stop plate.

[0017] The present invention sets a limiting roller to reduce the spacing in the middle of the transmission belt, so that the two fixed blocks are as close as possible, and sets a stop plate so that the fixed block will not shake due to the shaking of the transmission belt when moving, so that the fixed block moves more smoothly.

[0018] As a preferred embodiment of the above technical solution, one end of a fixed block on the bottom transmission belt structure is fixedly connected to a bottom limiting rope, one end of the bottom limiting rope is wrapped around one end of the corresponding top threaded telescopic rod and then fixedly connected to another fixed block on the bottom transmission belt, one end of a fixed block on the top transmission belt structure is fixedly connected to a top limiting rope, one end of the top limiting rope is wrapped around one end of the corresponding bottom threaded telescopic rod and then fixedly connected to another fixed block on the top transmission belt.

[0019] When the present invention is in use, as the distance between the top frame and the bottom frame continues to expand, the bottom limit rope and the top limit rope are pulled apart, and a diamond-shaped space is formed between the two, which facilitates the cylinder to be inserted into the diamond-shaped space and placed on the support frame. When the corresponding two fixed blocks move in an interlaced manner, the two ends of the corresponding bottom limit rope or top limit rope are pulled to interlace. At this time, the corresponding top threaded telescopic rod and bottom threaded telescopic rod have also contracted and no longer hang on the middle part of the corresponding bottom limit rope or top limit rope. Therefore, the bottom limit rope and the top limit rope are wrapped around the cylinder once, thereby firmly fixing the cylinder and facilitating subsequent boring.

[0020] According to the above-mentioned method for using a large cylindrical part boring tool, the method includes the following steps:

[0021] S1: Hang the middle part of the bottom limit rope on the top thread telescopic rod, and at the same time hang the middle part of the top limit rope on the bottom thread telescopic rod;

[0022] S2: Start the hydraulic lifting rod assembly to drive the top frame to move upward, and then drive the top threaded telescopic rod to move upward. As the distance between the top frame and the bottom frame continues to increase, the bottom limit rope and the top limit rope are pulled apart, forming a diamond-shaped space between the two.

[0023] S3: Pass the cylinder through the diamond-shaped space and place the cylinder on the support frame;

[0024] S4: Start the cylinder to drive the fine roller frame to move, so that the fine roller frame pulls the clamping belt to the outer wall of the cylinder, and uses the winding force of the clamping belt and the vortex spring to provide a clamping force on the outer wall of the cylinder;

[0025] S5: Start the bottom motor and the top motor to move the bottom transmission belt structure and the top transmission belt structure, so that the corresponding two fixed blocks pull the two ends of the corresponding bottom limit rope or top limit rope to intersect, and at this time, the corresponding top threaded telescopic rod and the bottom threaded telescopic rod have also contracted and no longer hang on the middle part of the corresponding bottom limit rope or top limit rope, so the bottom limit rope and the top limit rope are wrapped around the cylinder once, thereby firmly fixing the cylinder to facilitate subsequent boring.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a rough clamping structure on the support frame for preliminary limiting of the cylinder, and provides a bottom clamping structure for cooperation with a top clamping structure. The bottom limit rope and the top limit rope are used to wrap around the cylinder for one circle each, so that the clamping force of the workpiece can be converted into a circumferentially uniformly distributed force system, which can greatly reduce the clamping deformation and improve the clamping stability. At the same time, since the winding work is completed by the bottom clamping structure and the top clamping structure, the difficulty of winding the bottom limit rope and the top limit rope onto the cylinder is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 What is shown is the overall structural schematic diagram of the present invention;

[0029] Figure 2 Shown is a schematic diagram of the rough clamping structure of the present invention;

[0030] Figure 3 Shown is a bottom clamping structure diagram of the present invention;

[0031] Figure 4 Shown is a schematic diagram of the fixed clamping structure of the present invention;

[0032] Figure 5 Shown is a schematic structural diagram of the bottom transmission belt of the present invention.

[0033] In the figure: 1. Support frame; 2. Coarse clamping structure; 201. Coarse clamping frame; 202. Coarse roller; 203. Cylinder; 204. Fine roller frame; 205. Clamping belt; 3. Bottom clamping structure; 301. Bottom frame; 302. Bottom transmission belt structure; 303. Bottom motor; 304. Bottom drive bevel gear; 305. Bottom double-headed bevel gear; 306. Bottom telescopic bevel gear; 307. Bottom threaded telescopic rod; 308. Bottom limiting rope; 4. Top clamping structure; 401. Top frame; 402. Top transmission belt structure; 403. Top motor; 404. Top drive bevel gear; 405. Top double-headed bevel gear; 406. Top telescopic bevel gear; 407. Top threaded telescopic rod; 408. Hydraulic lifting rod group; 409. Top limiting rope; 5. Moving roller; 6. Transmission belt; 7. Limiting roller; 8. Fixed block; 9. Abutment plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0035] Example 1

[0036] A large cylindrical parts boring tool, such as Figures 1 to 5 As shown, it includes: two relatively arranged support frames 1, two coarse clamping structures 2 are relatively fixedly connected to the top of the support frames 1, two bottom clamping structures 3 are relatively arranged between the two support frames 1, and two top clamping structures 4 are relatively arranged above the two bottom clamping structures 3, and the top clamping structures 4 match the corresponding bottom clamping structures 3.

[0037] The present invention provides a rough clamping structure 2 on the support frame 1 for the preliminary limiting of the cylinder, and provides a bottom clamping structure 3 to cooperate with the top clamping structure 4, and utilizes the bottom limiting rope 308 and the top limiting rope 409 to wrap around the cylinder one circle each, so that the clamping force of the workpiece can be converted into a circumferentially uniformly distributed force system, which can greatly reduce the clamping deformation and improve the clamping stability. At the same time, since the winding work is completed by the bottom clamping structure 3 and the top clamping structure 4, the difficulty of winding the bottom limiting rope 308 and the top limiting rope 409 onto the cylinder is greatly reduced.

[0038] Refer to the instruction manual Figures 1 to 2, the rough clamping structure 2 includes a rough clamping frame 201. Between the two side edges of the inner wall of the rough clamping frame 201, two rough rollers 202 are installed. One of the rough rollers 202 is rotatably connected to the rough clamping frame 201, and a volute spring is installed at the connection between it and the rough clamping frame 201. The other rough roller 202 is fixedly connected to the rough clamping frame 201. One side of the rough clamping frame 201 is fixedly connected with a cylinder 203. The output end of the cylinder 203 penetrates through the rough clamping frame 201 and extends into the rough clamping frame 201, and its end is fixedly connected with a fine roller frame 204. A clamping belt 205 is fixedly wound around one of the rough rollers 202. One end of the clamping belt 205 is wound around the fine roller frame 204 and then fixedly connected to the other rough roller 202.

[0039] After the cylinder body is placed on the placement frame in the present invention, the cylinder 203 is started. The cylinder 203 drives the fine roller frame 204 to move, so that the fine roller frame 204 pulls the clamping belt 205 to tightly adhere to the outer wall of the cylinder body. At this time, because the clamping belt 205 is pulled, the corresponding rough roller 202 rotates, causing the volute spring to wind up and become tight. Using the reaction force of the volute spring, the clamping belt 205 is tightened to provide a clamping force on the outer wall of the cylinder body.

[0040] Refer to the attached drawings of the specification Figures 1 to 2 , the shape of the fine roller frame 204 is a U-shaped. Therefore, when the cylinder body tightly adheres to the clamping belt 205, the arc surface of the cylinder body will squeeze the clamping belt 205 towards the inside of the fine roller frame 204, so that the clamping belt 205 remains in close contact with the cylinder body. Both ends of the fine roller frame 204 are rotatably sleeved with roller shafts, which is convenient for the clamping belt 205 to be pulled. <>

[0041] Refer to the attached drawings of the specification Figure 1 and 3 , the bottom clamping structure 3 includes a bottom frame 301. At the top of the bottom frame 301, a bottom drive belt structure 302 is installed. One end of the bottom drive belt structure 302 penetrates through the bottom frame 301, and its end is fixedly connected with a bottom motor 303. The other end of the bottom drive belt structure 302 penetrates through the bottom frame 301, and its end is fixedly connected with a bottom drive bevel gear 304. One end of the bottom drive bevel gear 304 is meshed with a bottom double-headed bevel gear 305. One end of the bottom double-headed bevel gear 305 is meshed with a bottom telescopic bevel gear 306. One end of the bottom telescopic bevel gear 306 is fixedly connected with a bottom threaded telescopic rod 307. One end of the bottom threaded telescopic rod 307 penetrates through the bottom frame 301 and extends to the outside. <0>

[0042] When the present invention is in use, the bottom motor 303 is started to drive the bottom drive belt structure 302 to move, thereby driving two corresponding fixed blocks 8 to move alternately. At the same time, the movement of the bottom drive belt structure 302 drives the bottom drive bevel gear 304, and then sequentially drives the bottom double-headed bevel gear 305 and the bottom telescopic bevel gear 306 to rotate, so that the bottom threaded telescopic rod 307 retracts into the bottom frame 301 and no longer hangs on the middle part of the top limit rope 409.

[0043] Refer to the attached drawings of the specification Figure 1 and 4 The top clamping structure 4 includes a top frame 401, and a top transmission belt structure 402 is installed at the bottom end of the top frame 401. One end of the top transmission belt structure 402 is inserted into the interior of the top frame 401, and its end is fixedly connected to the top motor 403. The other end of the top transmission belt structure 402 is inserted into the interior of the top frame 401, and its end is fixedly connected to the top driving bevel gear 404. One end of the top driving bevel gear 404 is meshed with the top double-headed bevel gear 405, and one end of the top double-headed bevel gear 405 is meshed with the top telescopic bevel gear 406. One end of the top telescopic bevel gear 406 is fixedly connected to the top threaded telescopic rod 407. One end of the top threaded telescopic rod 407 is inserted into the top frame 401 and extends to the outside. The top of the top frame 401 is fixedly connected to the hydraulic lifting rod group 408.

[0044] When the present invention is in use, the top motor 403 is started to drive the top transmission belt structure 402 to move, and then drive the two corresponding fixed blocks 8 to move alternately. At the same time, the top transmission belt structure 402 moves to drive the top drive bevel gear 404, and then drives the top double-headed bevel gear 405 and the top telescopic bevel gear 406 to rotate in turn, so that the top threaded telescopic rod 407 retracts into the top frame 401 and no longer hangs on the middle part of the bottom limit rope 308.

[0045] Refer to the instruction manual Figure 1 、 4 and 5, the bottom transmission belt structure 302 and the top transmission belt structure 402 each include two movable rollers 5, the outer sides of the two movable rollers 5 are sleeved with a transmission belt 6, both ends of the transmission belt 6 are rotated to fit with the limiting roller 7, both sides of the transmission belt 6 are fixedly connected with a fixed block 8, and the inner side of the transmission belt 6 is provided with a support plate 9.

[0046] The present invention sets a limiting roller 7 to reduce the spacing in the middle of the transmission belt 6, so that the two fixed blocks 8 are as close as possible, and sets a stop plate 9 so that the fixed block 8 will not shake due to the shaking of the transmission belt 6 when moving, so that the fixed block 8 moves more smoothly.

[0047] Refer to the instruction manual Figure 1 、 3 And 4, one end of a fixed block 8 on the bottom transmission belt structure 302 is fixedly connected to the bottom limit rope 308, one end of the bottom limit rope 308 is wrapped around one end of the corresponding top threaded telescopic rod 407 and then fixedly connected to another fixed block 8 on the bottom transmission belt, one end of a fixed block 8 on the top transmission belt structure 402 is fixedly connected to the top limit rope 409, one end of the top limit rope 409 is wrapped around one end of the corresponding bottom threaded telescopic rod 307 and then fixedly connected to another fixed block 8 on the top transmission belt.

[0048] When the present invention is in use, as the distance between the top frame 401 and the bottom frame 301 continues to expand, the bottom limit rope 308 and the top limit rope 409 are pulled apart, and a diamond-shaped space is formed between the two, which facilitates the cylinder to be inserted into the diamond-shaped space and placed on the support frame 1. When the corresponding two fixed blocks 8 move in an interlaced manner, the two ends of the corresponding bottom limit rope 308 or top limit rope 409 will be pulled to interlace. At this time, the corresponding top threaded telescopic rod 407 and the bottom threaded telescopic rod 307 have also retracted and no longer hang on the middle part of the corresponding bottom limit rope 308 or top limit rope 409. Therefore, the bottom limit rope 308 and the top limit rope 409 are wrapped around the cylinder, thereby firmly fixing the cylinder, which is convenient for subsequent boring.

[0049] According to the above-mentioned method for using a large cylindrical part boring tool, the method includes the following steps:

[0050] S1: Hang the middle part of the bottom limit rope 308 on the top threaded telescopic rod 407, and at the same time hang the middle part of the top limit rope 409 on the bottom threaded telescopic rod 307;

[0051] S2: The hydraulic lifting rod assembly 408 is activated to move the top frame 401 upward, thereby driving the top threaded telescopic rod 407 upward. As the distance between the top frame 401 and the bottom frame 301 continues to increase, the bottom limit rope 308 and the top limit rope 409 are pulled apart, forming a diamond-shaped space between them.

[0052] S3: Pass the cylinder through the rhombus space and place the cylinder on the support frame 1;

[0053] S4: The cylinder 203 is started to drive the fine roller frame 204 to move, so that the fine roller frame 204 pulls the clamping belt 205 to the outer wall of the cylinder, and the winding force of the clamping belt 205 and the vortex spring is used to provide a clamping force on the outer wall of the cylinder;

[0054] S5: Start the bottom motor 303 and the top motor 403 to move the bottom transmission belt structure 302 and the top transmission belt structure 402, so that the corresponding two fixed blocks 8 pull the two ends of the corresponding bottom limit rope 308 or the top limit rope 409 to interlace, and at this time, the corresponding top threaded telescopic rod 407 and the bottom threaded telescopic rod 307 have also retracted and no longer hang on the middle part of the corresponding bottom limit rope 308 or the top limit rope 409, so the bottom limit rope 308 and the top limit rope 409 are wrapped around the cylinder, thereby firmly fixing the cylinder to facilitate subsequent boring.

[0055] Working principle: The present invention sets a rough clamping structure 2 on the support frame 1 for the preliminary limitation of the cylinder, and sets a bottom clamping structure 3 to cooperate with the top clamping structure 4, and uses the bottom limiting rope 308 and the top limiting rope 409 to wrap around the cylinder one circle each, so that the clamping force of the workpiece can be converted into a circumferentially uniformly distributed force system, which can greatly reduce the clamping deformation and improve the clamping stability. At the same time, since the winding work is completed by the bottom clamping structure 3 and the top clamping structure 4, the difficulty of winding the bottom limiting rope 308 and the top limiting rope 409 onto the cylinder is greatly reduced.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A large cylindrical parts boring tool, characterized in that: Including: Two oppositely arranged support frames, at the top of the support frames, two thick clamping structures are fixedly connected relatively. Between the two support frames, two bottom clamping structures are arranged relatively. Above the two bottom clamping structures, two top clamping structures are arranged relatively. The top clamping structure matches the corresponding bottom clamping structure. The thick clamping structure includes a thick clamping frame. Between the two sides of the inner wall of the thick clamping frame, two thick rollers are installed. One of the thick rollers is rotatably connected to the thick clamping frame, and a volute spring is installed at the connection between it and the thick clamping frame. The other thick roller is fixedly connected to the thick clamping frame. One side of the thick clamping frame is fixedly connected with a cylinder. The output end of the cylinder penetrates through the thick clamping frame and extends into the interior of the thick clamping frame, and its end is fixedly connected with a thin roller frame. A clamping belt is fixedly wound around one of the thick rollers. One end of the clamping belt winds around the thin roller frame and is fixedly connected to the other thick roller. The bottom clamping structure includes a bottom frame. At the top of the bottom frame, a bottom transmission belt structure is installed. One end of the bottom transmission belt structure penetrates through the bottom frame, and its end is fixedly connected with a bottom motor. The other end of the bottom transmission belt structure penetrates through the bottom frame, and its end is fixedly connected with a bottom driving bevel gear. One end of the bottom driving bevel gear is meshed with a bottom double-headed bevel gear. One end of the bottom double-headed bevel gear is meshed with a bottom telescopic bevel gear. One end of the bottom telescopic bevel gear is fixedly connected with a bottom threaded telescopic rod. One end of the bottom threaded telescopic rod penetrates through the bottom frame and extends to the outside. The top clamping structure includes a top frame. At the bottom of the top frame, a top transmission belt structure is installed. One end of the top transmission belt structure penetrates into the interior of the top frame, and its end is fixedly connected with a top motor. The other end of the top transmission belt structure penetrates into the interior of the top frame, and its end is fixedly connected with a top driving bevel gear. One end of the top driving bevel gear is meshed with a top double-headed bevel gear. One end of the top double-headed bevel gear is meshed with a top telescopic bevel gear. One end of the top telescopic bevel gear is fixedly connected with a top threaded telescopic rod. One end of the top threaded telescopic rod penetrates through the top frame and extends to the outside. At the top of the top frame, a hydraulic lifting rod group is fixedly connected. Both the bottom transmission belt structure and the top transmission belt structure include two moving rollers. A transmission belt is sleeved outside the two moving rollers. At both ends of both sides of the transmission belt, limiting rollers are rotatably fitted. Fixed blocks are fixedly connected to both sides of the transmission belt. A pressing plate is arranged inside the transmission belt. One end of a fixed block on the bottom transmission belt structure is fixedly connected with a bottom limiting rope. One end of the bottom limiting rope winds around one end of the corresponding top threaded telescopic rod and is fixedly connected with another fixed block on the bottom transmission belt. One end of a fixed block on the top transmission belt structure is fixedly connected with a top limiting rope. One end of the top limiting rope winds around one end of the corresponding bottom threaded telescopic rod and is fixedly connected with another fixed block on the top transmission belt.

2. A large cylindrical parts boring tool according to claim 1, characterized in that: The shape of the thin roller frame is a U shape, and rotating rollers are rotatably sleeved at both ends of the thin roller frame.

3. The method for using a large cylindrical part boring tool according to claim 1 or 2, characterized in that: The method includes the following steps: S1: Hang the middle part of the bottom limiting rope on the top threaded telescopic rod, and at the same time, hang the middle part of the top limiting rope on the bottom threaded telescopic rod; S2: Start the hydraulic lifting rod group to drive the top frame to move upward, and then drive the top threaded telescopic rod to move upward. As the distance between the top frame and the bottom frame continuously expands, the bottom limiting rope and the top limiting rope are pulled apart, and a diamond-shaped space is formed between the two. S3: Pass the cylinder through the diamond-shaped space and place the cylinder on the support frame; S4: Start the cylinder to drive the fine roller frame to move, so that the fine roller frame pulls the clamping belt to the outer wall of the cylinder, and uses the winding force of the clamping belt and the vortex spring to provide a clamping force on the outer wall of the cylinder; S5: Start the bottom motor and the top motor to move the bottom transmission belt structure and the top transmission belt structure, so that the corresponding two fixed blocks pull the two ends of the corresponding bottom limit rope or top limit rope to intersect, and at this time, the corresponding top threaded telescopic rod and the bottom threaded telescopic rod have also contracted and no longer hang on the middle part of the corresponding bottom limit rope or top limit rope, so the bottom limit rope and the top limit rope are wrapped around the cylinder once, thereby firmly fixing the cylinder to facilitate subsequent boring.

Images