A hydraulic equipment small-diameter conduit bending precision supplementing clamp and a use method thereof

Abstract

The present application belongs to the technical field of precise supplementary machining of hydraulic equipment conduit bending degree, and particularly relates to a hydraulic equipment small-diameter conduit bending degree precise supplementary machining clamp and a use method. The present application implements precise, digital and visual supplementary machining on small-diameter conduits, and realizes supplementary machining work of the conduit by using the principle of lever. By positioning of the fixed roller and the movable roller and setting of the multifunctional digital display meter, fixed torque value or fixed displacement supplementary machining can be realized, and digital and intelligent control can effectively solve the problems of pipe wall instability corrugation and roundness deviation that easily occur in the previous supplementary machining on the rigid bench using rubber type tires, improve the quality of conduit manual supplementary machining, and reduce the quality cost. The sizes of the fixed roller and the movable roller are selectable, and corresponding sizes of the fixed roller and the movable roller are selected according to the diameter size of the supplementary machined conduit, so that the supplementary machining work of different conduit diameter sizes can be met, and the use domain of the bending tool is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of precision machining of hydraulic equipment conduit curvature, and particularly relates to a fixture and method for precision machining of small-diameter hydraulic equipment conduit curvature. Background Technology

[0002] The functions of a hydraulic equipment's motorized system are achieved through the interconnection of various conduits forming an organic whole, enabling multiple actions and functions. These conduits are mostly made of aluminum alloy, high-hardness, and wear-resistant steel. During the installation of conduits in hydraulic equipment, factors such as manufacturing deviations, machine structure positioning errors, and misalignment between conduits can lead to axial deviations, eccentricities, and parallelism issues between conduits after installation, failing to meet technical specifications. This results in stress installation, which, under the high-vibration environment of the hydraulic equipment over time, can lead to stress concentration, fatigue fracture, oil leaks, and ultimately, safety accidents.

[0003] Currently, supplementary machining is still performed on rigid frames with traditional rubber tires. While this meets the technical requirements for conduit installation, it suffers from low accuracy, a high damage rate, and requires a high level of operator skill and experience. With product upgrades and continuous advancements in technology, the precision required for conduit installation is becoming increasingly stringent, making it impossible to meet the installation requirements of new technologies and standards. Therefore, researching a more precise, intelligent, and digital supplementary machining technology to effectively improve conduit installation accuracy and address the current and future technical requirements for conduit installation in hydraulic equipment is urgently needed. Summary of the Invention

[0004] The purpose of this invention is to study a precise, intelligent, and efficient catheter repair technology to effectively solve the problems of low precision and high damage rate that easily occur during catheter repair, such as tube wall instability and ripples, and roundness deviation. Therefore, a precision repair fixture for small-diameter catheters (hereinafter referred to as the fixture) is designed.

[0005] This invention has a clever structure and is easy to operate. It can realize digital and intelligent applications and perform precise, digital and visual repair processing on small-diameter conduits. It can effectively solve the problems of low precision and high damage rate, such as pipe wall instability and ripples, and roundness deviation, that occur in the repair processing of small-diameter aluminum and steel conduits with a diameter of less than 22mm. It can significantly improve the quality of conduit repair processing.

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

[0007] A precision machining fixture for small-diameter conduit bending in hydraulic equipment includes a support system, a bending system, and a digital display system.

[0008] The support 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, the block, the nut, the rubber, the bolt, and other parts of the bending system are integrated through the positioning plate, the shaft, the round nut, the locking nut, and other parts of the support system, and the handle of the digital display system is installed on the rotating plate of the bending system, so that the complete fixture is finally formed through the connection of the three systems, and specific details are shown in Figure 1 、 Figure 2 .

[0012] Each part is made of high-hardness steel material, except for the rubber and the multifunctional digital display meter.

[0013] The base is connected with the rotating plate, the positioning plate, and the handle through the shaft sleeve, the shaft, the positioning pin, the round nut, and the locking nut, and mainly serves to fix and support the whole fixture to be in a stable state.

[0014] The rotating plate is designed in a long and flat hole and a sawtooth shape, mainly serves to connect the movable roller positioning shaft, the movable roller, the star-shaped threaded handle, and the large gasket, and realizes the movement and fixation of the whole on the rotating plate.

[0015] The positioning plate is designed in a long and flat hole, mainly serves to connect the block, the nut, the rubber, and the bolt, and realizes the movement and fixation of the whole on the positioning plate.

[0016] The fixed roller is circular, the edge is designed in a groove round hole, is installed on the shaft, is limited by the positioning pin to prevent rotation, mainly serves to position the catheter and ensure the roundness of the catheter during processing.

[0017] The movable roller is also circular, the edge is designed in a groove round hole, is installed on the movable roller positioning shaft, can rotate freely around the shaft, rotates forward and backward with the handle, mainly serves to position the catheter, rotates with the handle to produce relative motion with the fixed roller to realize the processing function of the catheter.

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

[0019] The block, the nut, and the bolt are used to fix the rubber.

[0020] The cushion block is mainly used to connect the base and the positioning plate through the stud and the nut.

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

[0022] The multifunctional digital display meter is mainly used for measuring the torque and displacement during the pipe reprocessing, and aims to prevent the internal damage caused by excessive reprocessing of the pipe, and record the torque and displacement during the pipe reprocessing, so as to facilitate the traceability.

[0023] Method for use: the multifunctional digital display meter is powered by 2 pieces of No. 5 batteries; the power is turned on by short pressing the "NO / OFF" key, the liquid crystal display character is displayed, the self-checking is started, and the unit is selected by pressing the "▼" to select the required measurement unit, newton-meter or millimeter; the measurement mode is selected by pressing the "M" key to select the "tracking F" or "peak H" mode; the torque value or displacement value alarm presetting is performed by pressing the "M" to preset the "D" mode, and then pressing the "D" key to determine the number of bits of the required preset torque value or displacement value, pressing the "▼" and "▲" keys to determine the required preset alarm value, and then pressing the "M" key to exit the preset mode to the "tracking F" state, or pressing the "M" key again to enter the "peak H" state; the zero resetting is performed by pressing the "NO / OFF" key to make the current state "zero" when the fixture is in the natural horizontal and unloaded state before measurement; the measurement is performed by a) tracking measurement: pressing the "M" key to make the fixture in the "tracking F" state, in which the torque value or displacement value is displayed in real time, the torque value or displacement value increases when force is applied, the torque value or displacement value decreases when force is reduced, and the torque value or displacement value returns to "zero" when no force is applied, and the "backlight" is turned on or off by pressing the "S" key in this state; b) peak measurement: pressing the "M" key to make the fixture in the "peak H" state, in which the torque peak value or displacement peak value is recorded, the torque value or displacement value increases when force is applied, the torque value or displacement value remains in the current state when force is reduced, and the torque value or displacement value continues to increase when the applied force is greater than the current torque or displacement, that is, the state records the maximum torque value or displacement value, and the torque value or displacement value remains unchanged after the force is removed, and the current value is stored in the memory by pressing the "S" key in this state, so as to query the recorded torque value or displacement value after the measurement is completed; c) preset measurement: in the "tracking F" state or "peak H" state, when the applied force reaches the preset torque value or displacement value, the alarm light is bright, and the "beep" sound is also given, so that the force application can be stopped, and the alarm state can be exited by pressing the "NO / OFF" key after the force is removed.

[0024] The specific embodiment and steps of the present application are as follows:

[0025] First step: first, check the installation error of the pipe connection, and check according to the qualitative check method that the sleeve nut of the rotating pipe can be easily screwed in and out, and there is no tight feeling.

[0026] Second step: If the installation error of the pipe joint does not meet the requirements of the first step, draw the area of the pipe joint installation error with a pencil, i.e. the area that needs to be processed. In order to make the pipe have a relatively accurate shape when bending, it is recommended to use a 6mm diameter aluminum pipe as a working sample for the shape of the pipe to be processed.

[0027] Third step: Loosen the fixing element and remove the pipe from the hydraulic equipment. Install the process plug on the end of the pipe.

[0028] Fourth step: Fix the base of the clamp on the bench vice, then install the handle on the rotating plate, and check the firmness of the base and handle installation.

[0029] Fifth step: Check the fixed roller and movable roller of the pipe bending clamp, and the working surface of the rubber for the absence of contaminants and mechanical damage.

[0030] Sixth step: For the pipe processing amount less than 1mm, use the fixed roller and rubber for processing. Select a fixed roller with the same diameter as the pipe to be processed and install it on the shaft. Put the pipe into the middle of the fixed roller and rubber, loosen the bolt, adjust the rubber to be in contact with the pipe, and tighten the bolt to fix the rubber.

[0031] Seventh step: For the pipe processing amount greater than 1mm, use the fixed roller and movable roller for processing. Select a fixed roller and movable roller with the same diameter as the pipe to be processed and install them on the shaft and movable roller positioning shaft respectively. Put the area of the pipe to be processed into the middle of the fixed roller and movable roller, loosen the star-shaped handle, move the movable roller positioning shaft to the position where the pipe to be processed is in the slot of the fixed roller and movable roller, tighten the star-shaped handle to fix the movable roller.

[0032] Eighth step: Turn on the "NO / OFF" key of the multifunctional digital display meter. For the pipe processing without torque or displacement requirements, follow the usage method of the multifunctional digital display meter to adjust it to the working state. For the pipe processing with torque or displacement requirements, follow the usage method of the multifunctional digital display meter to preset the torque value or displacement amount to achieve fixed torque or displacement processing.

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

[0034] M = F x L

[0035] Where M is the torque, F is the vector force, and L is the force arm, which is the distance from the force point to the movable roller positioning shaft.

[0036] The displacement amount calculation formula is as follows:

[0037]

[0038] In the formula, a is the displacement to be reached, that is, the machining allowance, b is the distance from the force application point to the dynamic roller positioning shaft, and c is the distance from the intersection of the extension line of the force application point and the guide tube to the dynamic roller positioning shaft.

[0039] Step 9: Slowly and evenly apply torque or displacement to the handle with the hand, so that the handle is deflected around the dynamic roller positioning shaft to generate a bending force to machine the guide tube. Stop when the guide tube is machined to the required bending degree, press the "S" key of the multifunctional digital display meter to store the current value in the memory, and record.

[0040] Step 10: Loosen the bolt to remove the guide tube from between the fixed roller and the rubber, or loosen the star-shaped threaded handle to remove the guide tube from the fixed roller and the dynamic roller.

[0041] Step 11: Repeat the operation requirements of steps 6, 7, 8, 9 and 10 for each bending surface of the guide tube to complete the final machining work of the guide tube.

[0042] Step 12: Check that the outer surface of the guide tube in the bending area should have no mechanical damage and corrugation, and restore the equipment installation. Check the guide tube installation quality. If it still does not meet the requirements, repeat the above steps.

[0043] Step 13: After the work is completed, press the "NO / OFF" key of the multifunctional digital display meter to turn off the multifunctional digital display meter, and then disassemble the clamp and place it in the designated position.

[0044] Advantages of the present application:

[0045] (1) The present application has novel structure and is easy to operate, and can realize digital and intelligent application, precise, digital and visual machining of small diameter guide tubes, and machining of guide tubes by using the principle of lever. Through positioning of the fixed roller 6 and the dynamic roller 8 and setting of the multifunctional digital display meter 22, fixed torque value or fixed displacement machining can be realized, and digital and intelligent control can effectively solve the problems of pipe wall instability corrugation and roundness deviation that easily occur during machining on the rigid bench with a rubber type tire in the past, improve the quality of guide tube manual machining, and reduce the quality cost.

[0046] (2) The greatest highlight of the present application is that the sizes of the fixed roller 6 and the dynamic roller 8 are selectable. According to the diameter size of the machined guide tube, the corresponding size of the fixed roller and the dynamic roller can be selected to meet the machining work of guide tubes with different diameter sizes, and effectively improve the use domain of the bending tool.

[0047] (3) Another highlight of the present application is that the positions of the dynamic roller 8 and the rubber 14 are adjustable, and can be freely adjusted along the slide of the rotating plate 2 and the positioning plate 3, which increases the application range of the machining clamp and meets the machining work of guide tubes with different lengths and bending sizes.

[0048] (4) The present patent can be used as a small-diameter pipe machining clamp, which can be applied to the machining of small-diameter pipes of hydraulic equipment and other large equipment hydraulic systems, realizing multi-purpose application scenarios and increasing the application space of the present patent.

[0049] (5) The present patent can also be used as a tool for manufacturing small-diameter pipes, which can manufacture pipes with corresponding curvature according to needs, and can be used in various occasions such as ground testing, training and teaching, and auxiliary tool equipment maintenance, effectively expanding the application scenarios of the present patent. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is the front view of the clamp.

[0051] Figure 2 is the top view of the clamp.

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

[0053] Example 1:

[0054] A hydraulic equipment small-diameter pipe bending degree precision machining clamp, comprising a support system, a bending system and a digital display system.

[0055] The support system comprises a base 1, a positioning plate 3, a shaft sleeve 4, a shaft 5, a pad 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, the block 10, the nut 11, the rubber 14, the bolt 19 and other parts of the bending system are integrated through the positioning plate 3, the shaft 5, the round nut 17, the locking nut 18 and other parts of the support system, and the handle 12 of the digital display system is installed on the rotating plate 2 of the bending system. Finally, the connection of the three systems forms the complete body of the entire clamp, and the specific details are shown in Figure 1 、 Figure 2 .

[0059] Each part is made of high hardness steel material, except for the rubber 14 and the multifunctional digital display 22.

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

[0061] The rotating plate 2 is designed with a long and flat hole and a sawtooth shape, mainly for connecting the movable roller positioning shaft 7, the movable roller 8, the star-shaped threaded handle 9 and the large gasket 16, and realizing the movement and fixation of the whole on the rotating plate 2.

[0062] The positioning plate 3 is designed with a long and flat hole, mainly for connecting the block 10, the nut 11, the rubber 14 and the bolt 19, and realizing the movement and fixation of the whole on the positioning plate 3.

[0063] The fixed roller 6 is circular in shape, with a groove and a round hole at the edge, and is installed on the shaft 5, with the positioning pin 15 limiting the rotation, and its main function is to position the catheter and ensure the roundness of the catheter during processing.

[0064] The movable roller 8 is also circular in shape, with a groove and a round hole at the edge, and is installed on the movable roller positioning shaft 7, which can rotate freely around the shaft and rotate forward and backward with the handle 12, and its main function is to position the catheter and rotate with the handle 12 to generate relative motion with the fixed roller 6 to realize the catheter 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, the nut 11 and the bolt 19 are used to fix the rubber 14.

[0067] The cushion block 13 is mainly used to connect the base 3 and the positioning plate 3 through the stud 20 and the nut 21.

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

[0069] The multifunctional digital display 22 is mainly used to measure the torque and displacement during the catheter processing, with the purpose of preventing internal damage caused by excessive processing of the catheter, and recording the torque and displacement during the catheter processing for easy tracing.

[0070] Method of use: 1 multifunctional digital display table is powered by 2 sections 5 batteries; 2 short press "NO / OFF" key, turn on the power, liquid crystal display character display, start self-checking, 3 seconds after zero; 3 unit selection, press "▼" to select the desired measurement unit, newton meter or millimeter; 4 measurement mode selection: press "M" key, select "follow F" or "peak H" mode; 5 torque value or displacement value alarm preset: press "M" to preset "D" mode, press "D" key to determine the required preset torque value or displacement value, press "▼" and "▲" keys to determine the required preset alarm value, press "M" key to exit the preset mode after the preset is completed, to "follow F" state, or press "M" key again to enter "peak H" state; 6 zero: before measurement, press "NO / OFF" key to make the existing display value zero, and the current state is "zero position"; 7 measurement: a) follow measurement, press "M" key to make the clamp in "follow F" state, in this state, the measured display is the instantaneous torque value or displacement value, when force is added, the torque value or displacement value increases, when force is reduced, the torque value or displacement value decreases, and when no force is applied, the torque value or displacement value returns to "zero position", in this state, press "S" key to select "backlight" on or off; b) peak measurement, press "M" key to make the clamp in "peak H" state, in this state, the peak torque value or displacement value is recorded, when force is added, the torque value or displacement value increases, when force is reduced, the torque value or displacement value remains in the current state, and when the applied force is greater than the current torque or displacement, the value continues to increase, that is, this state records the maximum torque value or displacement value applied, and after the force is removed, the value remains unchanged, in this state, press "S" key to store the current value in the memory for subsequent inquiry of the recorded torque value or displacement value; c) preset measurement, in "follow F" state or "peak H" state, when the applied force reaches the preset torque value or displacement value, the alarm light is on, and there is a "beep" sound to prompt, at this time, the applied force can be stopped, and after the force is removed, press "NO / OFF" key to exit the alarm state.

[0071] Example 2:

[0072] The specific embodiment and steps of the present application are as follows:

[0073] First step: first check the installation error of the catheter connection, and check according to the qualitative inspection method of "rotating the outer sleeve nut of the catheter, the nut can be easily screwed in and out, and there is no tight feeling".

[0074] Second step: if the installation error of the catheter connection does not meet the inspection requirements of the first step, draw the area where the installation error of the catheter connection exists, i.e. the area that needs to be processed. In order to make the catheter obtain a relatively accurate shape when bending, it is recommended to use a 6mm diameter aluminum pipe as a working sample for the shape or section of the catheter to be processed.

[0075] Third step: Loosen the fixing elements and remove the pipe from the hydraulic equipment. Put the process plug or the encapsulant on the pipe end.

[0076] Fourth step: Fix the base 1 of the clamp on the bench vice, and then install the handle 12 on the rotating plate 2, and check the fixing of the base 1 and the handle 12.

[0077] Fifth step: Check the working surfaces of the fixed roller 6 and the movable roller 8 and the rubber 14 of the pipe bending clamp for no contaminants and mechanical damage.

[0078] Sixth step: For the pipe with a displacement of less than 1mm, use the fixed roller 6 and the rubber 14 for the finishing work. Select the fixed roller 6 with the same diameter as the pipe to be finished, and install it on the shaft 5. Put the pipe between the fixed roller 6 and the rubber 14, loosen the bolt 19, adjust the rubber 14 to be in contact with the pipe, and tighten the bolt 19 to fix the rubber 14.

[0079] Seventh step: For the pipe with a displacement of more than 1mm, use the fixed roller 6 and the movable roller 8 for the finishing work. Select the fixed roller 6 and the movable roller 8 with the same diameter as the pipe to be finished, and install them on the shaft 5 and the movable roller positioning shaft 7 respectively. Put the area of the pipe to be finished between the fixed roller 6 and the movable roller 8, loosen the star-shaped threaded handle 9, move the movable roller positioning shaft 7 to the position where the pipe to be finished is clamped between the fixed roller 6 and the movable roller 8, and tighten the star-shaped threaded handle 9 to fix the movable roller 8.

[0080] Eighth step: Turn on the "NO / OFF" key of the multifunctional digital display meter 22. For the pipe with no torque or displacement requirement for the finishing work, adjust it according to the usage of the multifunctional digital display meter 22 to make it work. For the pipe with torque or displacement requirement for the finishing work, preset the torque value or displacement according to the usage of the multifunctional digital display meter 22 to realize the constant torque or displacement finishing work.

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

[0082] M = F x L

[0083] In the formula, M is the torque, F is the vector force, and L is the force arm, which is the distance from the force point to the movable roller positioning shaft 7.

[0084] The displacement calculation formula is as follows:

[0085]

[0086] In the formula, a is the displacement to be reached, which is the finishing amount, b is the distance from the force point to the movable roller positioning shaft 7, and c is the distance from the intersection of the extension line of the force point and the pipe to the movable roller positioning shaft 7.

[0087] Step 9: Slowly and evenly apply torque or displacement to the handle 12 with hand, make the handle 12 deflect around the roller positioning shaft 7, generate bending force to perform the supplementary work of the catheter, stop when the necessary bending degree is reached, press the "S" key of the multifunctional digital display meter 22, store the current value in the memory, and record.

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

[0089] Step 11: Repeat the operation requirements of steps 6, 7, 8, 9 and 10 for each bending surface of the catheter to complete the final supplementary work of the catheter.

[0090] Step 12: Check that the outer surface of the catheter in the bending area should have no mechanical damage and corrugation, and restore the equipment installation, check the installation quality of the catheter, if still not meet the requirements, repeat the above steps.

[0091] Step 13: After the work is completed, press the "NO / OFF" key of the multifunctional digital display meter 22 to turn off the multifunctional digital display meter 22, and then disassemble the clamp and place it in the designated position.

Claims

1. A precision bending fixture for hydraulic equipment small diameter conduit, characterized in that, It comprises a supporting system, a bending system and a digital display system. The supporting 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), the block (10), the nut (11), the rubber (14) and the bolt (19) of the bending system are integrated through the positioning plate (3), the shaft (5), the round nut (17) and the 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, so that the three systems are connected to form a complete clamp. The base (1) is connected 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 with the movable roller positioning shaft (7), the movable roller (8), the star-shaped threaded handle (9) and the large gasket (16), so that the whole rotating plate (2) can move and be fixed on the rotating plate (2). The positioning plate (3) is designed as a long and flat hole, and is connected with the block (10), the nut (11), the rubber (14) and the bolt (19), so that the whole positioning plate (3) can move and be fixed on the positioning plate (3). The fixed roller (6) is installed on the shaft (5) and is limited from rotating by the positioning pin (15), and is used for positioning the catheter and ensuring the roundness of the catheter during processing. The movable roller (8) is installed on the movable roller positioning shaft (7) and can rotate freely around the shaft, and rotates forward and backward with the handle (12), and is used for positioning the catheter and realizing the processing function of the catheter by rotating with the handle (12) and the fixed roller (6). The star-shaped threaded handle (9) and the large gasket (16) are used for fixing the movable roller positioning shaft (7). The block (10), the nut (11) and the bolt (19) are used for fixing the rubber (14). The cushion block (13) is used for connecting the base (1) and the positioning plate (3) through the stud (20) and the nut (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 the bending. The multifunctional digital display meter (22) is used for measuring the torque and displacement during the processing of the catheter. For the pipe processing amount less than 1mm, the fixed roller (6) and rubber (14) are used for processing; the fixed roller (6) with the same diameter as the pipe is selected and installed on the shaft (5); the pipe is sent into the middle of the fixed roller (6) and rubber (14), the bolt (19) is loosened, the rubber (14) is adjusted to be in contact with the pipe, the bolt (19) is tightened to fix the rubber (14); For the pipe processing amount greater than 1mm, the fixed roller (6) and the movable roller (8) are used for processing; the fixed roller (6) and the movable roller (8) with the same diameter as the pipe are selected and installed on the shaft (5) and the movable roller positioning shaft (7) respectively; the area to be processed is placed in the middle of the fixed roller (6) and the movable roller (8), the star-shaped threaded handle (9) is loosened, the movable roller positioning shaft (7) is moved to the position, the pipe to be processed is placed in the notch of the fixed roller (6) and the movable roller (8) and is in a clamped state, the star-shaped threaded handle (9) is tightened to fix the movable roller (8).

2. A precision bending fixture for hydraulic equipment small diameter conduit as claimed in claim 1, wherein, The rotating plate (2) is long and thin, and is sawtooth-shaped.

3. A precision bending fixture for hydraulic equipment small diameter conduit as claimed in claim 1 or 2, wherein, 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 bending fixture for hydraulic equipment small diameter pipes as claimed in claim 1 or 2, wherein, The fixed roller (6) is circular, and the edge is designed as a groove.

5. A precision bending fixture for hydraulic equipment small diameter conduit as claimed in claim 3, wherein, The fixed roller (6) and the movable roller (8) are circular, and the edges are designed as grooves.

6. A precision bending fixture for hydraulic equipment small diameter ducts according to claim 1 or 2 or 5, characterized in that, The rubber (14) is made of soft plastic material, and the rubber (14) bears the pressure from the pipe and supports the pipe to complete bending.

7. A precision bending fixture for hydraulic equipment small diameter conduit as claimed in claim 3 wherein, The rubber (14) is made of soft plastic material, and the rubber (14) bears the pressure from the pipe and supports the pipe to complete bending.

8. A precision bending fixture for hydraulic equipment small diameter conduit as claimed in claim 4, wherein, The rubber (14) is made of soft plastic material, and the rubber (14) bears the pressure from the pipe and supports the pipe to complete bending.

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