Positioning and clamping device and method for spatial three-dimensional catheter measurement

Abstract

The invention discloses a positioning and clamping device and method for spatial three-dimensional catheter measurement. The positioning and clamping device for spatial three-dimensional catheter measurement is provided with a magnetic base, a fixing seat, a spatial angle adjusting mechanism, a supporting rod and a catheter positioning and clamping mechanism. The magnetic base is arranged on the positioning platform, the fixed seat is sleeved on the magnetic base, and the space angle adjusting mechanism is assembled on the fixed seat; the space angle adjusting mechanism comprises a clamping seat, a pressing sleeve, a pressing sleeve controller and a universal ball support arm; the two ends of the supporting rod are assembled with the supporting arm of the universal ball supporting arm and the catheter positioning and clamping mechanism correspondingly, and a connector of the space three-dimensional catheter is clamped and positioned through the catheter positioning and clamping mechanism. According to the invention, the original machine assembly attitude of the space three-dimensional conduit can be simulated, reliable measurement data is provided for mathematical modeling, and the purpose of ensuring the shape and size consistency of the new conduit and the original machine conduit is achieved.

Description

Technical Field

[0001] This invention relates to the field of testing and measurement technology, specifically to a positioning and clamping device and method for measuring three-dimensional conduits in aircraft hydraulic systems. Background Technology

[0002] As attached Figure 1 As shown, a three-dimensional spatial conduit 1 used in aircraft hydraulic systems has connectors 1-2 at both ends (or at the middle tee branch) of its body 1-1, which connect to hydraulic lines. During mass production, the three-dimensional spatial conduit 1 is positioned and measured using high-precision vector measurement equipment to create a three-dimensional conduit model, which is then transferred to a CNC pipe bending machine for processing. However, during aircraft maintenance, replacing damaged conduits 1 using the manufacturer's method of machining new conduits based on the spatial coordinate model is not only costly but also time-consuming.

[0003] The common practice for aircraft repair companies to replace ducts is as follows: after disassembling the original duct, its shape and dimensions are measured. A mathematical model is then created based on the measurement data, and a CNC pipe bending machine is used to manufacture the new duct according to the model. Therefore, accurate measurement of the original duct's shape and dimensions is necessary. However, due to the current lack of positioning and clamping tools suitable for three-dimensional ducts in different spaces, it is difficult to accurately simulate the original duct's installation posture. The measurement of the original duct's shape and dimensions can only be completed by the operator's visual inspection and with the help of simple tools such as rulers. This results in poor consistency between the new duct and the original duct, leading to high assembly stress after installation. Repeated adjustments can also cause an increase in surface defects and changes in the sealing surface condition, among other adverse effects. Summary of the Invention

[0004] This invention provides a positioning and clamping device and method for spatial three-dimensional catheter measurement. It aims to simulate the installation posture of the original catheter by cooperating with a magnetic base, a fixed seat, a spatial angle adjustment mechanism, a support rod and a catheter positioning and clamping mechanism, so as to provide reliable measurement data for mathematical modeling and achieve the purpose of ensuring the consistency of shape and size between the new catheter and the original catheter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A positioning and clamping device for spatial three-dimensional catheter measurement includes a magnetic base, a fixed base, a spatial angle adjustment mechanism, a support rod, and a catheter positioning and clamping mechanism. The magnetic base is placed on the positioning platform, the fixing seat is fitted onto the magnetic base, and a spatial angle adjustment mechanism is installed on the fixing seat; The spatial angle adjustment mechanism includes a clamping base, a clamping sleeve, a clamping sleeve controller, and a universal ball joint arm. The clamping base is a cylindrical structure, fixedly mounted on a fixed base, and has a wedge-shaped annular groove on its side wall. The inner side wall of the top of the clamping sleeve is a spherical arc surface. The clamping sleeve is fitted over the clamping base, and a cavity for accommodating the ball head of the universal ball joint arm is formed between the inner wall of the clamping sleeve and the clamping base. An elongated hole is opened at the top of the clamping sleeve. One end of the clamping sleeve controller is provided with a cone that matches the wedge-shaped annular groove on the clamping base. The cone passes through the side wall of the clamping sleeve and enters the wedge-shaped annular groove of the clamping base. The ball head of the universal ball joint arm is placed in the cavity between the clamping sleeve and the clamping base, and its arm protrudes from the elongated hole at the top of the clamping sleeve. The two ends of the support rod are respectively assembled with the support arm of the universal ball support arm and the conduit positioning and clamping mechanism, and the connector of the three-dimensional spatial conduit is clamped and positioned by the conduit positioning and clamping mechanism.

[0006] The above-mentioned positioning and clamping device for spatial three-dimensional duct measurement has an elongated hole at the top of the clamping sleeve extending from the center of the top of the clamping sleeve to the side wall, and the universal ball arm can be rotated 90º in the vertical plane through the elongated hole at the top of the clamping sleeve.

[0007] The aforementioned positioning and clamping device for spatial three-dimensional duct measurement has a spherical groove on the top of the clamping base that matches the ball head portion of the universal ball support.

[0008] The aforementioned positioning and clamping device for spatial three-dimensional duct measurement has a threaded hole on the side wall of the clamping sleeve; an external thread that mates with the threaded hole on the side wall of the clamping sleeve is provided on the clamping sleeve controller; and an operating handle is provided at the other end of the clamping sleeve controller.

[0009] The above-mentioned positioning and clamping device for spatial three-dimensional catheter measurement includes a positioning seat, a positioning rod, a positioning pin, and a clamping head. The positioning seat is a sleeve structure, which is fixedly connected to one end of the support rod, and a positioning pin assembly hole is provided on its side wall. One end of the positioning rod passes through the positioning seat and is detachably assembled with the clamping head. A locking ring groove that cooperates with the positioning pin is provided on the positioning rod.

[0010] The aforementioned positioning and clamping device for spatial three-dimensional duct measurement includes a magnetic base with a fixing and locking mechanism that cooperates with the positioning platform.

[0011] A positioning and clamping method for spatial three-dimensional catheter measurement, wherein the number of positioning and clamping devices used for spatial three-dimensional catheter measurement is determined according to the number of connectors on the spatial three-dimensional catheter, and the connectors on the spatial three-dimensional catheter are clamped and positioned by the positioning and clamping devices for spatial three-dimensional catheter measurement. The specific operation steps are as follows: a. Determine the approximate position of the magnetic base on the positioning platform according to the shape and size of the three-dimensional spatial conduit and its installation posture on the original machine; b. Use the clamping head to clamp and position one of the joints of the three-dimensional spatial guide tube, and then adjust the angle of the universal ball support arm through the spatial angle adjustment mechanism so that the bottom surface of the magnetic base fits into the positioning platform. c. The magnetic base is locked by a fixed locking mechanism to achieve spatial positioning of the connector; d. Repeat steps b and c to complete the positioning and clamping of the remaining connectors on the three-dimensional space conduit; e. Conduct measurement work on the three-dimensional duct in space.

[0012] In the above-mentioned positioning and clamping method for spatial three-dimensional conduit measurement, in operation step b, the angle adjustment of the universal ball support arm can be controlled by the external thread on the clamping sleeve controller engaging with the threaded hole on the side wall of the clamping sleeve to control the depth of the cone entering the wedge-shaped annular groove of the clamping seat.

[0013] In the above-mentioned positioning and clamping method for spatial three-dimensional conduit measurement, in operation step b, when adjusting the angle of the universal ball support arm, the cone of the clamping sleeve controller is rotated out by operating the handle. The outer wall of the cone engages with the wedge-shaped annular groove of the clamping seat, causing the clamping sleeve to move upward and releasing the clamping sleeve from the ball head of the universal ball support arm. At this time, the universal ball support arm can rotate 360º in the horizontal plane and flip 90º in the vertical plane, realizing the angle adjustment of the universal ball support arm.

[0014] In the above-mentioned positioning and clamping method for spatial three-dimensional catheter measurement, in operation step b, after the angle of the universal ball support arm is adjusted, the cone of the clamping sleeve controller is screwed in by operating the handle. The outer wall of the cone cooperates with the wedge-shaped annular groove of the clamping seat to move the clamping sleeve downward. The ball head of the universal ball support arm is pressed and fixed by the clamping sleeve. At this time, the universal ball support arm is in a locked state.

[0015] This invention provides a positioning and clamping device and method for measuring three-dimensional spatial conduits. When measuring the shape and dimensions of a three-dimensional spatial conduit, the number of devices using this invention can be determined based on the number of connectors on the conduit. First, the approximate position of the magnetic base on the positioning platform is determined according to the shape, dimensions, and installation posture of the three-dimensional spatial conduit on the original machine. A clamping head is used to clamp and position one connector of the three-dimensional spatial conduit. Then, the angle of the universal ball support arm is adjusted using a spatial angle adjustment mechanism to make the bottom surface of the magnetic base fit against the positioning platform. Next, the magnetic base is locked using a fixing and locking mechanism, achieving spatial positioning of this connector. After the remaining connectors on the three-dimensional spatial conduit are positioned and clamped in the same way, the positioning and clamping of the three-dimensional spatial conduit simulating the original machine's assembly posture is completed. Measurement work can then be carried out on the three-dimensional spatial conduit. Therefore, this invention can simulate the original machine's assembly posture of a three-dimensional spatial conduit, providing reliable measurement data for mathematical modeling and achieving the goal of ensuring the consistency of the shape and dimensions of the new conduit with the original conduit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a three-dimensional spatial conduit structure involved in this invention; Figure 2 This is a schematic diagram of the overall structure of the positioning and clamping device for spatial three-dimensional duct measurement in this invention; Figure 3 This is a cross-sectional structural diagram of a positioning and clamping device used for three-dimensional duct measurement in space; Figure 4 This is a schematic diagram of the cross-sectional structure of the clamping seat in the spatial angle adjustment mechanism; Figure 5 This is a schematic diagram of the clamping sleeve structure in the spatial angle adjustment mechanism; Figure 6 This is a cross-sectional structural diagram of the compression sleeve; Figure 7 This is a schematic diagram of the clamping sleeve controller structure; Figure 8 This is a schematic diagram illustrating the working principle of the spatial angle adjustment mechanism; Figure 9 This is a schematic diagram of the cross-sectional structure of the catheter positioning and clamping mechanism; Figure 10 This is a schematic diagram of the working state of a positioning and clamping device used for three-dimensional space catheter measurement (within). Figure 1 (Taking a three-dimensional conduit in mid-space as an example).

[0017] Explanation of each label in the diagram: 1 represents a three-dimensional conduit, 1-1 represents the tube body, and 1-2 represents the connector; 2 is a spatial angle adjustment mechanism 2-1 is the clamping base, 2-1-1 is the wedge-shaped annular groove, and 2-1-2 is the spherical groove. 2-2 is a clamping sleeve, 2-2-1 is a long hole, and 2-2-2 is a threaded hole. 2-3 is the clamping sleeve controller, 2-3-1 is the operating handle, 2-3-2 is the cone, and 2-3-3 is the external thread. 2-4 are omnidirectional ball joint arms; 3 is the support rod; 4 is the catheter positioning and clamping mechanism. 4-1 is the positioning seat, 4-2 is the positioning rod, 4-2-1 is the locking ring groove, 4-3 is the positioning pin, and 4-4 is the clamping head; 5 is a fixed base; 6 is a magnetic base; 7 is the positioning platform. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Referring to Figure 1, a three-dimensional spatial conduit 1 used in an aircraft hydraulic system has connectors 1-2 at both ends of its tube body 1-1, which are connected to hydraulic lines. During aircraft maintenance, when replacing a damaged three-dimensional spatial conduit 1, it is necessary to remove the damaged three-dimensional spatial conduit 1 from the aircraft body and establish a mathematical model based on its shape and size measurement data. The mathematical model is then transferred to a CNC pipe bending machine to produce a new conduit. Therefore, it is necessary to accurately measure the shape and size of the original conduit. However, due to the current lack of positioning and clamping tools suitable for different three-dimensional spatial conduits, it is difficult to accurately simulate the installation posture of the original conduit. The measurement of the shape and size of the original conduit can only be completed by the operator's visual inspection and with the help of simple tools such as rulers. This results in poor consistency between the new conduit and the original conduit, and there is a problem of high assembly stress after installation. After repeated repairs, there will be an increase in surface defects and changes in the state of the sealing surface.

[0020] See Figure 2 , Figure 3 This invention provides a positioning and clamping device and method for measuring three-dimensional conduits in space. It comprises a magnetic base 6, a fixed seat 5, a spatial angle adjustment mechanism 2, a support rod 3, and a conduit positioning and clamping mechanism 4. The magnetic base 6 is placed on a positioning platform 7 at the measurement station. A locking mechanism that cooperates with the positioning platform 7 is provided in the magnetic base 6. An operating knob is provided on the locking mechanism, allowing the magnetic base 6 to be attracted to the positioning platform 7 and to be released from the attraction, thus adjusting the position of the magnetic base 6. The fixed seat 5 is fitted onto the magnetic base 6, and the spatial angle adjustment mechanism 2 is mounted on the fixed seat 5. The spatial angle adjustment mechanism 2 includes a clamping seat 2-1, a clamping sleeve 2-2, a clamping sleeve controller 2-3, and a universal ball joint arm 2-4. The two ends of the support rod 3 are respectively assembled with the support arm of the universal ball joint arm 2-4 and the conduit positioning and clamping mechanism 4, thereby clamping and positioning the connector 1-2 of the three-dimensional conduit 1.

[0021] See Figure 2 , Figure 3 , Figure 4 The positioning and clamping device for spatial three-dimensional conduit measurement described in this invention has a cylindrical structure in the spatial angle adjustment mechanism 2, which is fixedly installed on the fixed seat 5 by bolts. A wedge-shaped annular groove 2-1-1 is provided on the side wall of the cylindrical clamping seat 2-1, and a spherical groove 2-1-2 matching the ball head part of the universal ball support arm 2-4 is provided on the top of the clamping seat 2-1.

[0022] See Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 8 The positioning and clamping device for spatial three-dimensional conduit measurement of the present invention has a spherical arc surface on the inner side wall of the top of the clamping sleeve 2-2 in the spatial angle adjustment mechanism 2. The clamping sleeve 2-2 is fitted outside the clamping seat 2-1. A cavity for accommodating the ball head of the universal ball support arm 2-4 is formed between the inner wall of the clamping sleeve 2-2 and the clamping seat 2-1. An elongated hole 2-2-1 is opened on the top of the clamping sleeve 2-2. The elongated hole 2-2-1 on the top of the clamping sleeve 2-2 extends from the center of the top of the clamping sleeve to the side wall.

[0023] See Figure 2 , Figure 3 , Figure 7 , Figure 8 The positioning and clamping device for spatial three-dimensional conduit measurement of the present invention has a spatial angle adjustment mechanism 2 in which a clamping sleeve controller 2-3 has a cone 2-3-2 at one end that matches the wedge-shaped annular groove 2-1-1 on the clamping seat 2-1, and an operating handle 2-3-1 at the other end. An external thread 2-3-3 is provided on the cross arm connecting the operating handle 2-3-1 and the cone 2-3-2. Correspondingly, a threaded hole 2-2-2 is provided on the side wall of the clamping sleeve 2-2. The external thread 2-3-3 on the clamping sleeve controller 2-3 matches the threaded hole 2-2-2 on the side wall of the clamping sleeve 2-2. The cone 2-2-3 of the clamping sleeve controller 2-3 passes through the threaded hole 2-2-2 on the side wall of the clamping sleeve 2-2 and enters the wedge-shaped annular groove 2-1-1 of the clamping seat 2-1. The surface of the cone 2-2-3 of the clamping sleeve controller 2-3 and the wedge-shaped annular groove 2-1-1 can be connected. 1. To control the up-and-down movement of the clamping sleeve 2-2, in a specific embodiment of the present invention, two sets of clamping sleeve controllers 2-3 can be selected. Correspondingly, two sets of threaded holes 2-2-2 are symmetrically arranged on the side wall of the clamping sleeve 2-2. At the symmetrical position, the conical surfaces 2-2-3 of the two sets of clamping sleeve controllers 2-3 simultaneously engage with the wedge-shaped annular groove 2-1-1 to ensure that the clamping sleeve 2-2 maintains a balanced state during the up-and-down movement. The ball head of the universal ball support arm 2-4 is placed in the cavity between the clamping sleeve 2-2 and the clamping seat 2-1. Its support arm passes through the long hole 2-2-1 at the top of the clamping sleeve. The universal ball support arm 2-4 can achieve 90º rotation in the vertical plane through the long hole 2-2-1 at the top of the clamping sleeve 2-2. At the same time, the ball head of the universal ball support arm 2-4 can also achieve 360º rotation in the cavity between the clamping sleeve 2-2 and the clamping seat 2-1.

[0024] See Figure 2 , Figure 3 , Figure 9The positioning and clamping device for measuring three-dimensional conduits in space according to the present invention includes a conduit positioning and clamping mechanism 4 comprising a positioning seat 4-1, a positioning rod 4-2, a positioning pin 4-3, and a clamping head 4-4. The positioning seat 4-1 is a sleeve structure, fixedly connected to one end of a support rod 3, and has a positioning pin assembly hole on its side wall. One end of the positioning rod 4-2 passes through the positioning seat 4-1 and is detachably assembled with the clamping head 4-4. A locking ring groove 4-2-1 that cooperates with the positioning pin 4-3 is provided on the positioning rod 4-2. In a preferred embodiment of the present invention, two sets of positioning pins 4-3 are arranged axially, and the locking ring groove 4-2-1 on the positioning rod 4-2 is located in the middle position. The two sets of positioning pins 4-3 can respectively cooperate with the locking ring groove 4-2-1 on the positioning rod 4-2 to adapt to the positioning and clamping of the three-dimensional conduit 1 when the size is in a positive and negative limit deviation state. The positioning rod is provided with a size scale corresponding to the size of the three-dimensional conduit 1 in a positive and negative limit deviation state.

[0025] See Figures 1 to 10 The present invention also provides a positioning and clamping method for spatial three-dimensional catheter measurement, so as to... Figure 1 Taking the three-dimensional spatial conduit 1 as an example, when using the positioning and clamping device for measuring three-dimensional spatial conduits as described in this invention to assist in measuring its shape and size, the number of devices using this invention can be determined based on the number of connectors on the conduit. Figure 1 The spatial three-dimensional conduit 1 shown has two connectors 1-2, which can be used with two sets of positioning and clamping devices. The specific operating steps are as follows: a. Determine the approximate position of the magnetic base 6 on the positioning platform 7 according to the shape and size of the three-dimensional spatial guide tube 1 and its installation posture on the original machine; b. Use clamping head 4-4 to clamp and position one of the connectors 1-2 of the three-dimensional space guide tube 1, and then adjust the angle of the universal ball support arm 2-4 through the space angle adjustment mechanism 2 so that the bottom surface of the magnetic base 6 fits with the positioning platform 7. c. Lock the magnetic base 6 by fixing the locking mechanism to achieve spatial positioning of this connector 1-2; d. Repeat steps b and c to complete the positioning and clamping of the remaining connectors on the three-dimensional space conduit 1. e. Conduct measurements on the three-dimensional duct 1 in this space.

[0026] In the above operation step b, for the angle adjustment of the universal ball support arm 2-4, the external thread 2-3-3 on the clamping sleeve controller 2-3 can be engaged with the threaded hole 2-2-2 on the side wall of the clamping sleeve 2-2 to control the depth of the cone 2-3-2 entering the wedge-shaped annular groove 2-1-1 of the clamping seat 2-1. When the cone 2-2-3 of the clamping sleeve controller 2-3 is unscrewed by operating the handle 2-3-1, the outer wall of the cone 2-2-3 engages with the wedge-shaped annular groove 2-1-1 of the clamping seat 2-1, causing the clamping sleeve 2-2 to move upward, thus releasing the clamping sleeve 2-2 from its position. The ball joint of the universal ball support 2-4 can be pressed down to adjust its angle (at this time, the universal ball support 2-4 can rotate 360º in the horizontal plane and flip 90º in the vertical plane). When the cone 2-2-3 of the clamping sleeve controller 2-3 is screwed in by operating the handle 2-3-1, the outer wall of the cone 2-2-3 cooperates with the wedge-shaped annular groove 2-1-1 of the clamping seat 2-1 to move the clamping sleeve 2-2 downward. The ball joint of the universal ball support 2-4 is pressed and fixed by the clamping sleeve 2-2, and the universal ball support 2-4 is in a locked state.

Claims

1. A positioning and clamping device for spatial three-dimensional duct measurement, characterized in that: It is equipped with a magnetic base (6), a fixed seat (5), a spatial angle adjustment mechanism (2), a support rod (3) and a guide tube positioning and clamping mechanism (4); The magnetic base (6) is placed on the positioning platform (7), the fixed seat (5) is fitted on the magnetic base (6), and the space angle adjustment mechanism (2) is installed on the fixed seat (5). The spatial angle adjustment mechanism (2) includes a clamping seat (2-1), a clamping sleeve (2-2), a clamping sleeve controller (2-3), and a universal ball joint arm (2-4). The clamping seat (2-1) is a cylindrical structure and is fixedly installed on a fixed seat (5). A wedge-shaped annular groove (2-1-1) is provided on the side wall of the clamping seat (2-1). The inner side wall of the top of the clamping sleeve (2-2) is spherical arc surface. The clamping sleeve (2-2) is fitted outside the clamping seat (2-1). A space is formed between the inner wall of the clamping sleeve (2-2) and the clamping seat (2-1) to accommodate the universal ball joint arm (2-4). The cavity of the ball head in the clamping sleeve (2-2) is provided, and an elongated hole (2-2-1) is opened at the top of the clamping sleeve (2-2); one end of the clamping sleeve controller (2-3) is provided with a cone (2-3-2) that matches the wedge-shaped annular groove (2-1-1) on the clamping seat (2-1), and the cone (2-2-3) passes through the side wall of the clamping sleeve (2-2) and enters the wedge-shaped annular groove (2-1-1) of the clamping seat (2-1); the ball head part of the universal ball support arm (2-4) is placed in the cavity between the clamping sleeve (2-2) and the clamping seat (2-1), and its support arm passes through the elongated hole (2-2-1) at the top of the clamping sleeve; The two ends of the support rod (3) are respectively assembled with the support arm of the universal ball support arm (2-4) and the conduit positioning clamping mechanism (4), and the connector (1-2) of the three-dimensional conduit (1) is clamped and positioned by the conduit positioning clamping mechanism (4).

2. The positioning and clamping device for spatial three-dimensional conduit measurement according to claim 1, characterized in that: The elongated hole (2-2-1) at the top of the clamping sleeve (2-2) extends from the center of the top of the clamping sleeve to the side wall, and the universal ball arm (2-4) can be rotated 90º in the vertical plane through the elongated hole (2-2-1) at the top of the clamping sleeve (2-2).

3. The positioning and clamping device for spatial three-dimensional conduit measurement according to claim 2, characterized in that: The top of the mounting base (2-1) is provided with a spherical groove (2-1-2) that matches the ball head portion of the universal ball arm (2-4).

4. The positioning and clamping device for spatial three-dimensional conduit measurement according to claim 3, characterized in that: The clamping sleeve (2-2) has a threaded hole (2-2-2) on its side wall; the clamping sleeve controller (2-3) has an external thread (2-3-3) that mates with the threaded hole (2-2-2) on its side wall; and the other end of the clamping sleeve controller (2-3) has an operating handle (2-3-1).

5. The positioning and clamping device for spatial three-dimensional conduit measurement according to any one of claims 1 to 4, characterized in that: The catheter positioning and clamping mechanism (4) includes a positioning seat (4-1), a positioning rod (4-2), a positioning pin (4-3), and a clamping head (4-4). The positioning seat (4-1) is a sleeve structure, which is fixedly connected to one end of the support rod (3), and a positioning pin assembly hole is provided on its side wall. One end of the positioning rod (4-2) passes through the positioning seat (4-1) and is detachably assembled with the clamping head (4-4). A locking ring groove (4-2-1) that cooperates with the positioning pin (4-3) is provided on the positioning rod (4-2).

6. The positioning and clamping device for spatial three-dimensional conduit measurement according to claim 5, characterized in that: The magnetic base (6) is provided with a fixing and locking mechanism that cooperates with the positioning platform (7).

7. A positioning and clamping method for spatial three-dimensional conduit measurement, characterized in that: The number of positioning clamping devices for spatial three-dimensional catheter measurement as described in any one of claims 1 to 6 is determined based on the number of connectors (1-2) on the spatial three-dimensional catheter (1). The positioning clamping devices for spatial three-dimensional catheter measurement are used to clamp and position the connectors (1-2) on the spatial three-dimensional catheter (1). The specific operation steps are as follows: a. Determine the approximate position of the magnetic base (6) on the positioning platform (7) according to the shape and size of the three-dimensional duct (1) and its installation posture on the original machine; b. Use clamping head (4-4) to clamp and position one of the joints of the three-dimensional space guide tube (1), and then adjust the angle of the universal ball support arm (2-4) through the space angle adjustment mechanism (2) so that the bottom surface of the magnetic base (6) fits with the positioning platform (7); c. Lock the magnetic base (6) by fixing the locking mechanism to achieve spatial positioning of this connector (1-2); d. Repeat steps b and c to complete the positioning and clamping of the remaining connectors on the three-dimensional conduit (1); e. Conduct measurement work on the three-dimensional spatial conduit (1).

8. The positioning and clamping method for spatial three-dimensional conduit measurement according to claim 7, characterized in that: In operation step b, the angle adjustment of the universal ball support arm (2-4) is controlled by the external thread (2-3-3) on the clamping sleeve controller (2-3) cooperating with the threaded hole (2-2-2) on the side wall of the clamping sleeve (2-2) to control the depth of the cone (2-3-2) entering the wedge-shaped annular groove (2-1-1) of the clamping seat (2-1).

9. The positioning and clamping method for spatial three-dimensional conduit measurement according to claim 8, characterized in that: In operation step b, when adjusting the angle of the universal ball support arm (2-4), the cone (2-3-2) of the clamping sleeve controller (2-3) is rotated out by operating the handle (2-3-1). The outer wall of the cone (2-3-2) cooperates with the wedge-shaped annular groove (2-1-1) of the clamping seat (2-1) to move the clamping sleeve (2-2) upward, releasing the clamping sleeve (2-2) from pressing the ball head of the universal ball support arm (2-4). At this time, the universal ball support arm (2-4) can rotate 360º in the horizontal plane and flip 90º in the vertical plane, realizing the angle adjustment of the universal ball support arm (2-4).

10. The positioning and clamping method for spatial three-dimensional conduit measurement according to claim 8, characterized in that: In operation step b, after the angle of the universal ball support arm (2-4) is adjusted, the cone (2-3-2) of the clamping sleeve controller (2-3) is screwed in by operating the handle (2-3-1). The outer wall of the cone (2-3-2) cooperates with the wedge-shaped annular groove (2-1-1) of the clamping seat (2-1) to move the clamping sleeve (2-2) downward. The ball head of the universal ball support arm (2-4) is pressed and fixed by the clamping sleeve (2-2). At this time, the universal ball support arm (2-4) is in a locked state.

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