Hydraulic equipment small-diameter guide pipe curvature accurate supplementary machining clamp and using method

Abstract

The invention belongs to the technical field of hydraulic equipment guide pipe curvature accurate supplementary machining, and particularly relates to a hydraulic equipment small-diameter guide pipe curvature accurate supplementary machining clamp and a using method. Precise, digital and visual supplementary machining is carried out on a small-diameter guide pipe, supplementary machining work of the guide pipe is achieved through the lever principle, fixed torque value or positioning displacement supplementary machining and digital and intelligent control can be achieved through positioning of the fixed rolling wheel and the movable rolling wheel and arrangement of the multifunctional digital display meter, and the machining efficiency is improved. The problems that the pipe wall is prone to instability and corrugation and roundness deviation is generated during supplementary machining on a rigid rack using a rubber mold tire in the prior art can be effectively solved, the manual supplementary machining quality of the guide pipe is improved, and the quality cost is reduced. The size of the fixed roller and the size of the movable roller are selectable, the fixed roller and the movable roller of the corresponding size are selected according to the diameter size of a supplementary machining guide pipe, supplementary machining work of guide pipes of different diameter sizes can be met, and the use range of the pipe bending tool is effectively widened.

Description

Technical Field

[0001] The present invention belongs to the technical field of precise curvature compensation processing of hydraulic equipment conduits, and in particular relates to a precise curvature compensation processing fixture for small-diameter conduits of hydraulic equipment and a use method thereof. Background Art

[0002] The functions of hydraulic equipment motorized systems are realized by connecting various conduits to form an organic whole to realize multiple actions and other functions of hydraulic equipment. Most of these conduits are made of aluminum alloy, high-hardness, wear-resistant steel materials. In hydraulic equipment, during the installation of conduits of various systems, due to the existence of multiple factors such as conduit manufacturing deviation, body structure positioning error, and matching error between conduits, there are axial deviations, eccentricity, and parallelism between pipes after the conduit is installed, which do not meet the requirements of technical documents. There is stress installation. In the high vibration environment of hydraulic equipment for a long time, stress concentration will occur, and then fatigue fracture, oil leakage, and safety accidents will occur.

[0003] At present, supplementary processing is still being carried out on the rigid stand of the traditional rubber tire. Although it can meet the technical index requirements of catheter installation, it has low accuracy and high damage rate, and requires high proficiency and experience of operators. In the process of product upgrading and continuous advancement of advanced technology, the accuracy of catheter installation is becoming increasingly stringent and can no longer meet the installation requirements of new technologies and new standards. Therefore, it is urgent to study a more accurate, intelligent, and digital supplementary processing technology that can effectively improve the accuracy of catheter installation and solve the current and future requirements of hydraulic equipment for catheter installation technical indicators. Summary of the invention

[0004] The purpose of inventing this patent is to study a precise, digital, and efficient catheter repair technology to effectively solve the problems of low precision and high damage rate such as tube wall instability and corrugation, roundness deviation, etc. that are easy to occur during catheter repair. Therefore, a small-diameter catheter precision repair fixture (hereinafter referred to as the fixture) is designed.

[0005] The present invention has an ingenious structure and is easy to operate. It can realize digital applications and implement precise, digital, and visualized repair processing of small-diameter catheters. It can effectively solve the problems of low precision and high damage rate such as tube wall instability and corrugation and roundness deviation that occur in the repair processing of small-diameter aluminum and steel catheters with a diameter of less than 22 mm, thereby greatly improving the quality of catheter repair processing.

[0006] The technical solution of the present invention is as follows:

[0007] A hydraulically-equipped small-diameter conduit bending precision processing fixture comprises a support system, a bending system and a digital display system.

[0008] The supporting system comprises a base, a positioning plate, a shaft sleeve, a shaft, a cushion block, a round nut, a locking nut, a stud and a nut.

[0009] The bending system comprises a rotating plate, a fixed roller, a movable roller positioning shaft, a movable roller, a star-shaped threaded handle, a block, a nut, a rubber, a positioning pin, a large gasket and a bolt.

[0010] The digital display system comprises a handle and a multifunctional digital display meter.

[0011] The rotating plate, block, nut, rubber, bolt and other parts of the bending system are integrated into one through the supporting system positioning plate, shaft, round nut, lock nut and other parts, and the handle of the digital display system is installed on the rotating plate of the bending system. Finally, the complete body of the whole fixture is formed through the connection of the three major systems. For details, see Figure 1 , Figure 2 .

[0012] All parts are made of high-hardness steel, except the rubber and the multi-function digital display.

[0013] The base connects the rotating plate, the positioning plate and the handle together through a shaft sleeve, a shaft, a positioning pin, a round nut and a locking nut. Its main function is to fix and support the entire fixture to keep it in a stable state.

[0014] The rotating plate adopts a long flat hole and a sawtooth design, and its main function is to connect the movable roller positioning shaft, the movable roller, the star-shaped threaded handle and the large gasket to achieve overall movement and fixation on the rotating plate.

[0015] The positioning plate is designed with long flat holes, and its main function is to connect the block, nut, rubber and bolt to realize the movement and fixation of the whole on the positioning plate.

[0016] The fixed roller is circular, with a grooved circular hole design on the edge, installed on the shaft, and limited by a positioning pin to prevent rotation. Its main function is to position the catheter and ensure the roundness of the catheter during supplementary processing.

[0017] The movable roller is also circular, with a grooved circular hole design on the edge. It is installed on the movable roller positioning shaft and can rotate freely around the shaft and rotate back and forth with the handle. Its main function is to position the catheter. As the handle rotates, it generates relative motion with the fixed roller to realize the catheter supplementary processing function.

[0018] The star-shaped threaded handle and the large gasket are used to fix the movable roller positioning shaft.

[0019] The blocks, nuts and bolts are used to fix the rubber.

[0020] The pad is mainly used to connect the base 3 and the positioning plate through studs and nuts.

[0021] The rubber is made of soft plastic material. When the catheter is bent and stressed between the fixed roller and the rubber, the rubber bears the pressure from the catheter and supports the catheter to complete bending.

[0022] The multifunctional digital display is mainly used to measure the torque and displacement during the catheter reprocessing. The purpose is to prevent the catheter from being damaged internally due to excessive reprocessing and to record the torque and displacement during the catheter reprocessing for easy tracing.

[0023] Instructions for use: The multifunctional digital display is powered by 2 No. 5 batteries; short press the "NO / OFF" key to turn on the power, the LCD display will display characters, start self-test, and reset to zero after 3 seconds; unit selection, press "▼" to select the required measurement unit, Nm or mm; measurement method selection: press the "M" key to select "tracking F" or "peak H" mode; torque value or displacement alarm preset: press "M" to preset "D" mode, then press the "D" key to determine the required preset torque value or displacement digit, press the "▼" and "▲" keys to determine the required preset alarm value, after the preset is completed, press the "M" key to exit the preset mode and go to the "tracking F" state, or press the "M" key again to enter the "peak H" state; reset: before measuring, put the fixture in a natural horizontal no-load state, press the "NO / OFF" key to change the existing display value, so that the current state is "zero"; measurement: a) Tracking measurement Press the "M" key to put the fixture in the "tracking F" state, in this state, the measurement displays the instant torque b) Peak measurement: Press the "M" key to put the fixture in the "peak H" state. In this state, the torque peak value or displacement peak value is recorded. When the force is applied, the torque value or displacement increases. When the force is reduced, the torque value or displacement decreases. When no force is applied, the torque value or displacement reaches the "zero position". In this state, press the "S" key to select the "backlight" on or off; b) Peak measurement: Press the "M" key to put the fixture in the "peak H" state. In this state, the torque peak value or displacement peak value is recorded. When the force is applied, the torque value or displacement increases. When the force is reduced, the torque value or displacement remains unchanged in the current state. When the force is continued to be greater than the current torque or displacement, the value continues to increase. That is, this state records the maximum torque value or displacement applied. The value remains unchanged after unloading the force. In this state, press the "S" key and the current value is stored in the memory for querying the recorded torque value or displacement after the measurement is completed; c) Preset measurement: In the "tracking F" state or the "peak H" state, when the force reaches the preset torque value or displacement, the alarm light is on and there is a "beep" alarm prompt. At this time, you can stop applying force. After unloading the force, press the "NO / OFF" key to exit the alarm state.

[0024] The specific implementation methods and steps of the patent of this invention are as follows:

[0025] Step 1: First check the installation error of the catheter connection by using the qualitative inspection method of "rotating the outer nut of the catheter, the nut can be easily screwed in and out without any tightness".

[0026] Step 2: If the installation error of the conduit connection does not meet the inspection requirements of the first step, use a pencil to mark the area where the conduit connection has installation errors, that is, the area that needs to be reprocessed. In order to make the conduit obtain a more accurate shape when bending the conduit, it is recommended to use a 6mm diameter aluminum tube to make a working sample for the desired conduit shape.

[0027] Step 3: Loosen the fixing elements and remove the conduit from the hydraulic equipment. Install the process plug on the end of the conduit.

[0028] Step 4: Fix the base of the clamp on the bench vise, then install the handle on the rotating plate, and check the firmness of the base and handle.

[0029] Step 5: Check the working surfaces of the fixed roller, movable roller and rubber of the pipe bending fixture to see if there are any contaminants or mechanical damage.

[0030] Step 6: When the amount of catheter reworking is less than 1mm, use a fixed roller and rubber to rework. Select a fixed roller with the same diameter as the catheter to be reworked and install it on the shaft. Put the catheter between the fixed roller and the rubber, loosen the bolts, adjust the rubber to be in contact and tight state with the catheter, and tighten the bolts to fix the rubber.

[0031] Step 7: When the amount of catheter reprocessing is greater than 1mm, use fixed rollers and moving rollers for reprocessing. Select fixed rollers and moving rollers of the same diameter as the catheter to be reprocessed, and install them on the shaft and moving roller positioning shaft respectively. Place the area where the catheter needs to be reprocessed between the fixed roller and the moving roller, loosen the star-shaped threaded handle, move the moving roller positioning shaft position, place the catheter to be reprocessed in the fixed roller and the moving roller slot, and put it in a clamped state, and tighten the star-shaped threaded handle to fix the moving roller.

[0032] Step 8: Turn on the "NO / OFF" button of the multi-function digital display. If there is no torque or displacement requirement for the catheter processing, debug it according to the method of using the multi-function digital display to make it reach the working state; if there is a torque or displacement requirement for the catheter processing, preset the torque value or displacement according to the method of using the multi-function digital display to realize fixed torque or displacement processing.

[0033] The torque value calculation formula is as follows:

[0034] M=F×L

[0035] In the formula, M is the moment, F is the vector force, and L is the lever arm, which is the distance from the force application point to the positioning axis of the moving roller.

[0036] The displacement calculation formula is as follows:

[0037]

[0038] In the formula, a is the displacement to be achieved, that is, the amount of supplementary processing, b is the distance from the force application point to the moving roller positioning axis, and c is the distance from the intersection of the extension line of the force application point and the guide tube to the moving roller positioning axis.

[0039] Step 9: Use your hand to slowly and evenly apply torque or displacement to the handle to deflect the handle around the roller positioning axis, generate bending force to perform catheter re-processing, stop when the catheter is re-processed to the necessary curvature, press the "S" key on the multi-function digital display, store the current value in the memory, and record it.

[0040] Step 10: Loosen the bolts and remove the catheter from between the fixed roller and the rubber, or loosen the star-shaped threaded handle and remove the catheter from the fixed roller and the movable roller.

[0041] Step 11: Repeat the operating requirements of steps 6, 7, 8, 9 and 10 for each curved surface of the catheter to complete the final processing of the catheter.

[0042] Step 12: Check the outer surface of the conduit in the bending area to ensure there is no mechanical damage or corrugation, and restore the equipment installation. Check the installation quality of the conduit. If it still does not meet the requirements, repeat the above steps.

[0043] Step 13: After the work is completed, press the "NO / OFF" button of the multi-function digital display to turn off the multi-function digital display, and remove the fixture and place it in the designated location.

[0044] Advantages of the present invention:

[0045] (1) The patent of the present invention has a novel structure, is easy to operate, and can realize digital and intelligent applications. It can implement precise, digital, and visual reprocessing of small-diameter catheters. The lever principle is used to realize the reprocessing of catheters. Through the positioning of the fixed roller 6 and the movable roller 8, and the setting of the multi-function digital display 22, fixed torque value or positioning displacement reprocessing can be realized. Digital and intelligent control can effectively solve the problems of tube wall instability, corrugation, and roundness deviation that are prone to occur in reprocessing on a rigid stand using rubber tires in the past, thereby improving the quality of manual reprocessing of catheters and reducing quality costs.

[0046] (2) The biggest highlight of the present invention is that the sizes of the fixed roller 6 and the movable roller 8 are selectable. According to the diameter of the catheter to be processed, the fixed roller and the movable roller of the corresponding size are selected to meet the processing work of different catheter diameters, effectively improving the use range of the bending tool.

[0047] (3) Another highlight of the present invention is that the positions of the movable roller 8 and the rubber 14 are adjustable, and the positions can be freely adjusted along the slideways of the rotating plate 2 and the positioning plate 3, thereby increasing the application scope of the supplementary processing fixture and meeting the supplementary processing work of catheters of different lengths and curvature sizes.

[0048] (4) The present invention is a small-diameter conduit repair fixture that can be used for the repair of small-diameter conduits in hydraulic equipment and other large-scale equipment hydraulic systems, thereby realizing multi-purpose application scenarios and expanding the scope of application of the present invention.

[0049] (5) The invention can also be used as a tool for making small-diameter catheters. Catheters with corresponding curvature and curvature can be made according to needs. They can be used in various occasions such as ground tests, training and teaching, and auxiliary tooling equipment maintenance, effectively broadening the application scenarios of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is the front view of the fixture.

[0051] Figure 2 is a top view of the fixture.

[0052] In the figure: 1 base, 2 rotating plate, 3 positioning plate, 4 sleeve, 5 shaft, 6 fixed roller, 7 moving roller positioning shaft, 8 moving roller, 9 star thread handle, 10 block, 11 nut, 12 handle, 13 spacer, 14 rubber, 15 positioning pin, 16 large gasket, 17 round nut, 18 locking nut, 19 bolt, 20 stud, 21 nut, 22 multi-function digital display. DETAILED DESCRIPTION

[0053] Embodiment 1:

[0054] A hydraulically-equipped small-diameter conduit bending precision processing fixture comprises a support system, a bending system and a digital display system.

[0055] The supporting system includes a base 1 , a positioning plate 3 , a sleeve 4 , a shaft 5 , a cushion block 13 , a round nut 17 , a locking nut 18 , a stud 20 , and a nut 21 .

[0056] The bending system comprises a rotating plate 2, a fixed roller 6, a movable roller positioning shaft 7, a movable roller 8, a star-shaped threaded handle 9, a block 10, a nut 11, a rubber 14, a positioning pin 15, a large gasket 16 and a bolt 19.

[0057] The digital display system comprises a handle 12 and a multifunctional digital display meter 22 .

[0058] The rotating plate 2, block 10, nut 11, rubber 14, bolt 19 and other parts of the bending system are integrated into one through the supporting system positioning plate 3, shaft 5, round nut 17, locking nut 18 and other parts, and the handle 12 of the digital display system is installed on the rotating plate 2 of the bending system. Finally, the complete body of the entire fixture is formed through the connection of the three major systems. For details, see Figure 1 , Figure 2 .

[0059] All parts are made of high-hardness steel material, except the rubber 14 and the multi-function digital display meter 22.

[0060] The base 1 connects the rotating plate 2, the positioning plate 3 and the handle 12 together through the sleeve 4, the shaft 5, the positioning pin 15, the round nut 17 and the locking nut 18. Its main function is to fix and support the entire clamp to keep it in a stable state.

[0061] The rotating plate 2 is designed with a long flat hole and a sawtooth shape, and its main function is to connect the movable roller positioning shaft 7, the movable roller 8, the star-shaped threaded handle 9 and the large gasket 16 to achieve the overall movement and fixation on the rotating plate 2.

[0062] The positioning plate 3 is designed with a long flat hole, and its main function is to connect the block 10, the nut 11, the rubber 14 and the bolt 19 to achieve the movement and fixation of the whole on the positioning plate 3.

[0063] The fixed roller 6 is circular, with a grooved circular hole design on the edge, mounted on the shaft 5, and limited by a positioning pin 15 to prevent rotation. Its main function is to position the catheter and ensure the roundness of the catheter during supplementary processing.

[0064] The movable roller 8 is also circular, with a grooved circular hole design on the edge, installed on the movable roller positioning shaft 7, and can rotate freely around the shaft and rotate back and forth with the handle 12. Its main function is to position the catheter, and it generates relative motion with the fixed roller 6 as the handle 12 rotates to realize the catheter supplementary processing function.

[0065] The star-shaped threaded handle 9 and the large gasket 16 are used to fix the movable roller positioning shaft 7 .

[0066] The block 10 , nut 11 and bolt 19 are used to fix the rubber 14 .

[0067] The pad 13 is mainly used to connect the base 3 and the positioning plate 3 through the studs 20 and the nuts 21.

[0068] The rubber 14 is made of soft plastic material. When the catheter is bent and stressed between the fixed roller 6 and the rubber 14, the rubber 14 bears the pressure from the catheter and supports the catheter to complete bending.

[0069] The multifunctional digital display 22 is mainly used to measure the torque and displacement during the catheter reprocessing. The purpose is to prevent the catheter from being damaged internally due to excessive reprocessing and to record the torque and displacement during the catheter reprocessing for easy tracing.

[0070] Instructions for use: 1. The multifunctional digital display is powered by 2 No. 5 batteries; 2. Press the "NO / OFF" key to turn on the power, the LCD display will display characters, start self-test, and reset to zero after 3 seconds; 3. Unit selection, press "▼" to select the required measurement unit, Nm or mm; 4. Measurement mode selection: press the "M" key to select the "tracking F" or "peak H" mode; 5. Torque value or displacement alarm preset: press "M" to preset the "D" mode, then press the "D" key to determine the required preset torque value or displacement digit, press the "▼" and "▲" keys to determine the required preset alarm value, after the preset is completed, press the "M" key to exit the preset mode and go to the "tracking F" state, or press the "M" key again to enter the "peak H" state; 6. Clear: Before measuring, put the fixture in a natural horizontal no-load state, press the "NO / OFF" key to reset the existing display value, so that the current state is "zero"; 7. Measurement: a) Tracking measurement Press the "M" key to put the fixture in the "tracking F" state. In this state, the measurement display The instant torque value or displacement increases when the force is applied, decreases when the force is reduced, and reaches "zero" when no force is applied. In this state, press the "S" key to select "backlight" on or off; b) Peak measurement Press the "M" key to put the fixture in the "peak H" state. This state records the torque peak or displacement peak. The torque value or displacement increases when the force is applied, and remains unchanged when the force is reduced. If a force greater than the current torque or displacement is applied, The value continues to increase, that is, this state is recording the maximum torque value or displacement applied. The value remains unchanged after unloading. In this state, press the "S" key, and the current value is stored in the memory for querying the recorded torque value or displacement after the measurement is completed; c Preset measurement in the "tracking F" state or "peak H" state, when the force reaches the preset torque value or displacement, the alarm light is on and there is a "beep" alarm prompt. At this time, you can stop applying force. After unloading the force, press the "NO / OFF" key to exit the alarm state.

[0071] Embodiment 2:

[0072] The specific implementation methods and steps of the patent of this invention are as follows:

[0073] Step 1: First check the installation error of the catheter connection by using the qualitative inspection method of "rotating the outer nut of the catheter, the nut can be easily screwed in and out without any tightness".

[0074] Step 2: If the installation error of the conduit connection does not meet the inspection requirements of the first step, use a pencil to mark the area where the conduit connection has installation errors, that is, the area that needs to be reprocessed. In order to make the conduit obtain a more accurate shape when bending the conduit, it is recommended to use a 6mm diameter aluminum tube to make a working sample for the shape or section of the desired conduit.

[0075] Step 3: Loosen the fixing elements and remove the catheter from the hydraulic equipment. Install the process plug or encapsulation on the catheter end.

[0076] Step 4: Fix the base 1 of the clamp on the bench vise, then install the handle 12 on the rotating plate 2, and check whether the base 1 and the handle 12 are firmly installed.

[0077] Step 5: Check the working surfaces of the fixed roller 6, the movable roller 8 and the rubber 14 of the pipe bending fixture to see if there are any pollutants or mechanical damage.

[0078] Step 6: When the displacement of the catheter for reworking is less than 1mm, use the fixed roller 6 and the rubber 14 for reworking. Select a fixed roller 6 with the same diameter as the catheter for reworking and install it on the shaft 5. Put the catheter between the fixed roller 6 and the rubber 14, loosen the bolt 19, adjust the rubber 14 to be in contact and tight state with the catheter, and tighten the bolt 19 to fix the rubber 14.

[0079] Step 7: When the displacement of the catheter reprocessing is greater than 1mm, use the fixed roller 6 and the movable roller 8 for reprocessing. Select the fixed roller 6 and the movable roller 8 with the same diameter as the catheter to be reprocessed, and install them on the shaft 5 and the movable roller positioning shaft 7 respectively. Put the area of ​​the catheter to be reprocessed between the fixed roller 6 and the movable roller 8, loosen the star-shaped threaded handle 9, move the movable roller positioning shaft 7, place the catheter to be reprocessed in the notch of the fixed roller 6 and the movable roller 8, and put it in a clamped state, and tighten the star-shaped threaded handle 9 to fix the movable roller 8.

[0080] Step 8: Turn on the "NO / OFF" button of the multi-function digital display 22. If there is no torque or displacement requirement for the catheter supplementary processing, debug it according to the method of using the multi-function digital display 22 to make it reach the working state; if there is a torque or displacement requirement for the catheter supplementary processing, preset the torque value or displacement according to the method of using the multi-function digital display 22 to realize fixed torque or displacement supplementary processing.

[0081] The torque value calculation formula is as follows:

[0082] M=F×L

[0083] Wherein, M is the moment, F is the vector force, and L is the lever arm, which is the distance from the force application point to the movable roller positioning axis 7.

[0084] The displacement calculation formula is as follows:

[0085]

[0086] In the formula, a is the displacement to be achieved, that is, the amount of supplementary processing, b is the distance from the force application point to the movable roller positioning axis 7, and c is the distance from the intersection of the extension line of the force application point and the guide tube to the movable roller positioning axis 7.

[0087] Step 9: Use your hand to slowly and evenly apply torque or displacement to the handle 12 to deflect the handle 12 around the roller positioning axis 7, generate bending force to perform catheter re-processing, stop when the catheter is re-processed to the necessary curvature, press the "S" key of the multi-function digital display 22, store the current value in the memory, and record it.

[0088] Step 10: Loosen the bolt 19 and take out the catheter from between the fixed roller 6 and the rubber 14, or loosen the star-shaped threaded handle 9 and take out the catheter from the fixed roller 6 and the movable roller 8.

[0089] Step 11: Repeat the operating requirements of steps 6, 7, 8, 9 and 10 for each curved surface of the catheter to complete the final processing of the catheter.

[0090] Step 12: Check the outer surface of the conduit in the bending area to ensure there is no mechanical damage or corrugation, and restore the equipment installation. Check the installation quality of the conduit. If it still does not meet the requirements, repeat the above steps.

[0091] Step 13: After the work is finished, press the "NO / OFF" key of the multi-function digital display 22 to turn off the multi-function digital display 22, and remove the fixture and put it in the designated position.

Claims

1. A precision machining fixture for the curvature of a small diameter conduit of hydraulic equipment, characterized in that: Including support system, bending system and digital display system; The support system comprises a base (1), a positioning plate (3), a shaft sleeve (4), a shaft (5), a cushion block (13), a round nut (17), a locking nut (18), a stud (20), and a nut (21); The bending system comprises a rotating plate (2), a fixed roller (6), a movable roller positioning shaft (7), a movable roller (8), a star-shaped threaded handle (9), a block (10), a nut (11), a rubber (14), a positioning pin (15), a large gasket (16) and a bolt (19); The digital display system comprises a handle (12) and a multifunctional digital display meter (22); The rotating plate (2), block (10), nut (11), rubber (14), and bolt (19) of the bending system are integrated into one body through the positioning plate (3), shaft (5), round nut (17), and locking nut (18) of the supporting system, and the handle (12) of the digital display system is installed on the rotating plate (2) of the bending system, and finally the complete body of the whole fixture is formed by connecting the three major systems; The base (1) is connected together with the rotating plate (2), the positioning plate (3) and the handle (12) through the shaft sleeve (4), the shaft (5), the positioning pin (15), the round nut (17) and the locking nut (18); The rotating plate (2) is connected to the movable roller positioning shaft (7), the movable roller (8), the star-shaped threaded handle (9) and the large gasket (16) to achieve the overall movement and fixation on the rotating plate (2); The positioning plate (3) is designed with a long flat hole, and is connected with a block (10), a nut (11), a rubber (14) and a bolt (19) to achieve the movement and fixation of the entirety on the positioning plate (3); The fixed roller (6) is mounted on the shaft (5) and is limited by a positioning pin (15) to prevent rotation. Its main function is to position the catheter and ensure the roundness of the catheter during supplementary processing. The movable roller (8) is mounted on the movable roller positioning shaft (7) and can rotate freely around the shaft and rotate forward and backward with the handle (12). The function is to position the catheter and to generate relative motion with the fixed roller (6) as the handle (12) rotates to realize the catheter supplementary processing function; The star-shaped threaded handle (9) and the large gasket (16) are used to fix the movable roller positioning shaft (7); The block (10), nut (11) and bolt (19) are used to fix the rubber (14); The cushion block (13) is used to connect the base 3 and the positioning plate (3) through studs (20) and nuts (21); When the catheter is bent and stressed between the fixed roller (6) and the rubber (14), the rubber (14) bears the pressure from the catheter and supports the catheter to complete bending; the multifunctional digital display (22) is used to measure the torque and displacement during the catheter repair process.

2. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 1, characterized in that: The rotating plate (2) is provided with a long flat hole and a sawtooth shape.

3. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 1 or 2, characterized in that: The base (1), the positioning plate (3), the shaft sleeve (4), the shaft (5), the rotating plate (2), the block (10) and the cushion block (13) are made of high-hardness steel material.

4. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 1 or 2, characterized in that: The fixed roller (6) is circular, and its edge is designed with a grooved circular hole.

5. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 3, characterized in that: The fixed roller (6) and the movable roller (8) are circular, and the edges thereof are designed with grooved circular holes.

6. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 1, 2 or 5, characterized in that: The rubber (14) is made of soft plastic material. The rubber (14) bears the pressure from the catheter and supports the catheter to complete bending.

7. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 3, characterized in that: The rubber (14) is made of soft plastic material. The rubber (14) bears the pressure from the catheter and supports the catheter to complete bending.

8. A precision machining fixture for curvature compensation of small diameter conduits of hydraulic equipment as claimed in claim 4, characterized in that: The rubber (14) is made of soft plastic material. The rubber (14) bears the pressure from the catheter and supports the catheter to complete bending.

9. A method for using a precision machining fixture for the curvature of a small diameter conduit of hydraulic equipment, characterized in that: Here are the steps: Step 1: First check the installation error of the catheter connection, and check it according to the qualitative inspection method of "rotating the outer nut of the catheter, the nut can be easily screwed in and out, and there is no tightness"; Step 2: If the installation error of the conduit connection does not meet the inspection requirements of the first step, use a pencil to mark the area where the installation error of the conduit connection exists, that is, the area that needs to be reprocessed; Step 3: Loosen the fixing elements and remove the catheter from the hydraulic equipment; install the process plug (or encapsulation) on the end of the catheter; Step 4: Fix the base (1) of the fixture on the bench vise, then install the handle (12) on the rotating plate (2), and check the installation firmness of the base (1) and the handle (12); Step 5: Check the working surfaces of the fixed roller (6), the movable roller (8) and the rubber (14) of the pipe bending fixture to see if there are any contaminants or mechanical damage. Step 6: When the amount of the catheter to be reworked is less than 1 mm, the fixed roller (6) and the rubber (14) are used for rework; a fixed roller (6) having the same diameter as the catheter to be reworked is selected and installed on the shaft (5); the catheter is fed between the fixed roller (6) and the rubber (14), the bolt (19) is loosened, the rubber (14) is adjusted to be in contact and pressed state with the catheter, and the bolt (19) is tightened to fix the rubber (14); Step 7: When the amount of catheter reprocessing (displacement) is greater than 1 mm, the fixed roller (6) and the movable roller (8) are used for reprocessing; the fixed roller (6) and the movable roller (8) having the same diameter as the catheter to be reprocessed are selected and installed on the shaft (5) and the movable roller positioning shaft (7) respectively; the area of ​​the catheter to be reprocessed is placed between the fixed roller (6) and the movable roller (8), the star-shaped threaded handle (9) is loosened, and the movable roller positioning shaft (7) is moved so that the catheter to be reprocessed is placed in the notch of the fixed roller (6) and the movable roller (8) and is in a clamped state, and the star-shaped threaded handle (9) is tightened to fix the movable roller (8); Step 8: Turn on the "NO / OFF" button of the multifunctional digital display (22). If there is no torque or displacement requirement for the catheter supplementary processing, debug it according to the method of using the multifunctional digital display (22) to make it reach the working state; if there is a torque or displacement requirement for the catheter supplementary processing, preset the torque value or displacement according to the method of using the multifunctional digital display (22) to realize the fixed torque or displacement supplementary processing; Step 9: Use your hand to slowly and evenly apply a torque or displacement to the handle (12) to deflect the handle (12) around the roller positioning axis (7) to generate a bending force to perform catheter re-processing. When the catheter is re-processed to the necessary bending degree, stop processing and press the "S" key of the multi-function digital display (22) to store the current value in the memory and record it. Step 10: Loosen the bolt (19) and take out the catheter from between the fixed roller (6) and the rubber (14), or loosen the star-shaped threaded handle (9) and take out the catheter from the fixed roller (6) and the movable roller (8); Step 11: Repeat the operation requirements of steps 6, 7, 8, 9 and 10 for each curved surface of the catheter to complete the final processing of the catheter; Step 12: Check that there is no mechanical damage or ripples on the outer surface of the conduit in the bending area, and restore the equipment installation to check the installation quality of the conduit. If it still does not meet the requirements, repeat the above steps; Step 13: After the work is finished, press the "NO / OFF" key of the multi-function digital display (22) to turn off the multi-function digital display (22), and remove the fixture and put it in the designated location.

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