A device for measuring diameter and wall thickness of aviation pipes

Abstract

The present invention discloses a mechanism for measuring the diameter and wall thickness of aviation pipes, which relates to the technical field of aviation pipe measurement. The mechanism comprises a base plate, a clamping assembly, and a swing arm mechanism. A parallel hollow plate is provided above the base plate, a fixed plate is fixed in the middle of the top surface, a hollow ring is fixed on the top surface of the fixed plate, and aviation pipes concentric with the hollow rings are placed on the plate. Four rectangular sleeves are fixed on the inner surface of the hollow ring, and rectangular slides are inserted inside. The outer ends of the slides are connected to the inner wall of the pipe through the clamping assembly. I-shaped slide rails are provided on both sides of the top surface of the hollow plate, and a U-shaped slide is provided on the upper side. A swing arm mechanism is installed between the slide and the slide rail on the same side. A connecting plate is fixed on the top surface of the U-shaped slide, and a Z-shaped clamp is fixed on the top. A V-shaped notch is provided on the top of the clamp, which rests on both sides of the pipe. The present invention solves the problems of measurement stability and accuracy through ingenious design, optimization of the clamping assembly and precise measurement, achieves dual reliable clamping and precise measurement, improves efficiency and accuracy, is highly practical, and provides a guarantee for the quality inspection of aviation pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation pipe measurement, and in particular to a mechanism for measuring the diameter and wall thickness of aviation pipes. Background Art

[0002] The aviation industry places extremely high demands on the precision of pipes, especially in high-pressure and high-speed environments such as engines, aircraft fuel, and hydraulic systems. Existing measurement equipment typically uses contact methods to measure pipe diameter and wall thickness, which has many limitations. With technological advancements, non-contact measurement technologies have gradually developed and entered the market. Among these, non-contact measurement methods using technologies such as lasers and ultrasonic waves enable precise measurements without contacting the pipe surface.

[0003] Existing measurement technologies face numerous challenges in the production and quality inspection of aviation tubing. For one thing, poorly designed clamping mechanisms result in insufficient inner wall clamping force and poor stability, while outer wall clamping is unstable and has low positioning accuracy. This leads to the tubing easily shaking during measurement, affecting the accuracy of the results. Furthermore, limitations in measurement methods prevent accurate measurement of tubing diameter and wall thickness, making it difficult to meet the stringent high-precision measurement requirements of the aviation industry. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of stability and accuracy in the measurement process of aviation pipes in the prior art, and to propose a mechanism for measuring the diameter and wall thickness of aviation pipes.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] A mechanism for measuring the diameter and wall thickness of aviation tubing comprises a base plate, a clamping assembly, and a swing arm mechanism. Parallel hollow plates are disposed above the base plate, each having a rectangular through-hole in the middle. A fixed plate is fixed to the middle of the top surface of the hollow plate, and a hollow ring is fixed to the middle of the top surface of the fixed plate. Aviation tubing is placed on the fixed plate, concentrically with the hollow ring.

[0007] The inner ring surface of the hollow ring is fixed with four evenly distributed rectangular sleeves, and a rectangular slide is slidably inserted into the interior of each rectangular sleeve. The outer end of each rectangular slide is connected to the inner wall of the aviation pipe through a clamping assembly;

[0008] A pair of symmetrically distributed I-shaped slide rails are fixed on both sides of the top surface of the hollow plate, each of the I-shaped slide rails is fixed to the fixed plate, and a U-shaped slide plate is slidably fitted on each of the I-shaped slide rails, and a swing arm mechanism is installed between the U-shaped slide plate and the I-shaped slide rail on the same side;

[0009] A connecting plate is fixed to the middle of the top surface of each U-shaped slide plate, a Z-shaped clamp is fixed to the top end of each connecting plate, a V-shaped notch is opened on the top of each Z-shaped clamp, and a pair of V-shaped notches are respectively against both sides of the aviation pipe.

[0010] Preferably, the clamping assembly includes a T-shaped slide bar and a rubber splint, the outer end of the rectangular slide is fixed with a vertically distributed fixed connecting plate, the top and middle of the fixed connecting plate are opened with a pair of positioning sliding holes, each of the positioning sliding holes is slidably inserted with a T-shaped slide bar, and the outer ends of the pair of T-shaped slide bars are respectively fixed to the upper and lower ends of the rubber splint, the outer side surface of the rubber splint is against the inner wall of the aviation pipe, and the outer end part of each T-shaped slide bar is sleeved with a tension spring.

[0011] Preferably, a fixed shaft is rotatably inserted into the middle of the fixed plate, and a concentrically fixed turntable is sleeved on the top end of the fixed shaft. Four evenly distributed arc-shaped pin holes are provided on the turntable, and a limiting pin is slidably inserted into the interior of each of the arc-shaped pin holes. A U-shaped notch is provided at the end of each of the rectangular slides, and each limiting pin is fixedly inserted in the corresponding U-shaped notch.

[0012] Preferably, the swing arm mechanism includes an L-shaped swing arm, a pair of symmetrically distributed fixed pins are rotatably inserted on the front and rear sides of the I-shaped slide rail, an L-shaped swing arm is fixed to the outer end of each of the fixed pins, a first elliptical pin hole is opened at the top end of each of the L-shaped swing arms, and a pair of symmetrically distributed first pins are fixed on the front and rear sides of the U-shaped slide, and the outer end of each of the first pins is slidably inserted in the first elliptical pin hole on the same side.

[0013] Preferably, a second elliptical pin hole is provided at the bottom end portion of each of the L-shaped swing arms, and an elliptical connecting plate is suspended between the bottom plate and the fixed plate. The two ends of the elliptical connecting plate are respectively located between the bottom ends of the two pairs of L-shaped swing arms, and a pair of second pin shafts are fixedly provided at the two ends of the elliptical connecting plate. The two ends of each of the second pin shafts are slidably inserted into the corresponding second elliptical pin hole.

[0014] Preferably, a pair of symmetrically distributed rectangular sliding holes are opened on both sides of the elliptical connecting plate, and a pair of symmetrically distributed fixed slide plates are fixed on both sides of the bottom surface of the fixed plate. The bottom end of each of the fixed slide plates slides through the corresponding rectangular sliding hole and is fixed to the top surface of the bottom plate.

[0015] Preferably, a threaded barrel is fixedly provided in the middle of the elliptical connecting plate, a threaded screw is inserted into the interior of the threaded barrel, and the top end of the screw is fixedly connected coaxially with the bottom end of the fixed shaft.

[0016] Preferably, a square through hole is opened in the middle of the top surface of the bottom plate, and a servo motor with the output end facing upward is fixedly installed inside the square through hole, and the motor shaft end of the servo motor is coaxially fixedly connected to the bottom end of the screw.

[0017] Preferably, a first notch is opened in the middle of the V-shaped notch, a first laser rangefinder is fixedly installed inside the first notch, and the laser emitting end of the first laser rangefinder is perpendicular to the outer side wall of the aviation tube. A pair of second notches are opened at the outer ends of a pair of rectangular slides on the left and right sides, and a second laser rangefinder is fixedly installed inside the second notch, and the laser emitting end of the second laser rangefinder is perpendicular to the inner side wall of the aviation tube.

[0018] Preferably, a pair of symmetrically distributed U-shaped plates are fixed on both sides of the top surface of the base plate, and both sides of the bottom surface of the hollow plate are fixed to a pair of U-shaped plates respectively. Support legs are fixed at the four corners of the bottom surface of the base plate, and several evenly distributed first anti-slip grooves are opened on the two side walls inside the V-shaped notch, and several evenly distributed second anti-slip grooves are opened on the outer side surface of the rubber splint.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the base plate serves as the basic support and is placed firmly with the legs. The hollow plate provides the installation foundation and operating space for other components. The I-shaped slide rail and U-shaped slide plate cooperate to guide the clamping components on the outer wall of the aviation pipe. The elliptical connecting plate, lead screw and servo motor form a transmission system that converts rotational motion into linear motion, driving the various components to work together, making the entire measuring mechanism compact in structure and stable and reliable in operation.

[0021] 2. In the present invention, by improving the clamping assembly and utilizing parts such as a T-shaped slide bar and a tension spring, the clamping force on the inner wall of the aviation pipe is enhanced. When the fixed shaft rotates, the turntable drives the rectangular slide plate to slide through the arc-shaped pin hole and the limit pin shaft. The T-shaped slide bar is connected to the rubber splint. Under the action of the tension spring, the rubber splint fits tightly against the inner wall of the aviation pipe, continuously increasing the clamping force and preventing the aviation pipe from shaking during measurement and affecting the accuracy.

[0022] 3. In the present invention, the first laser rangefinder and the second laser rangefinder respectively measure the outer diameter and inner diameter of the aviation pipe. By using the principle of pulsed laser ranging and combining it with the speed of light propagation, the round-trip time of the light pulse is accurately calculated to obtain the inner and outer diameter dimensions of the aviation pipe, and then calculate the wall thickness. This achieves accurate measurement of the diameter and wall thickness of the aviation pipe, meeting the high-precision requirements of the aviation field.

[0023] In summary, the present invention solves the problems of stability and accuracy during the measurement of aviation pipes through its ingenious structural design, optimized clamping components, and precise measurement methods. The various components work together to achieve dual reliable clamping and precise measurement of the pipes, improving measurement efficiency and accuracy. This method has excellent practicality and application value, providing reliable assurance for the quality inspection of aviation pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the present invention (excluding aviation pipes);

[0028] Figure 4 It is a structural schematic diagram of the swing arm mechanism of the present invention;

[0029] Figure 5 It is a schematic exploded view of the structure of the swing arm mechanism of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the clamping assembly of the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of the structure of the clamping assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the structural cross-section explosion of the clamping assembly of the present invention;

[0033] Serial numbers in the figure: 100, bottom plate; 101, U-shaped plate; 102, fixed slide; 103, servo motor; 104, lead screw; 105, fixed shaft; 106, elliptical connecting plate; 107, second pin; 108, threaded barrel; 109, aviation pipe; 200, hollow plate; 201, I-shaped slide rail; 202, U-shaped slide; 203, connecting plate; 204, Z-shaped clamping plate; 205, V-shaped notch; 206, first laser rangefinder; 2 07. First pin; 208. Fixed pin; 209. L-shaped swing arm; 210. First elliptical pin hole; 211. Second elliptical pin hole; 300. Fixed plate; 301. Hollow ring; 302. Rectangular sleeve; 303. Turntable; 304. Arc-shaped pin hole; 305. Rectangular slide; 306. Limit pin; 307. Second laser rangefinder; 308. Fixed connecting plate; 309. Rubber splint; 310. T-shaped slide bar; 311. Tension spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: This example provides a mechanism for measuring the diameter and wall thickness of aviation pipes. Figures 1-8 , specifically, it includes a base plate 100, a clamping assembly, and a swing arm mechanism. The base plate 100 serves as the basic support member of the entire mechanism, carrying various components and stably placing them through the legs. A parallel hollow plate 200 is provided above the base plate 100. The hollow plate 200 provides an installation basis for the I-shaped slide rail 201, the fixed plate 300, etc. The rectangular through hole in the middle facilitates the operation of the structure below. A rectangular through hole is opened in the middle of the hollow plate 200. A fixed plate 300 is fixed in the middle of the top surface of the hollow plate 200. The fixed plate 300 is connected to the hollow ring 301, the fixed slide plate 102, etc., and is a carrier for placing the aviation pipe 109 and installing some components. A hollow ring 301 is fixed in the middle of the top surface of the fixed plate 300. The hollow ring 301 provides an installation basis for the clamping assembly and is concentrically distributed with the aviation pipe 109 to assist in positioning. The aviation pipe 109 concentrically distributed with the hollow ring 301 is placed on the fixed plate 300.

[0036] The inner surface of the hollow ring 301 is fixed with four evenly distributed rectangular sleeves 302. The rectangular sleeves 302 guide the sliding of the rectangular slides 305. A rectangular slide 305 is slidably inserted into the interior of each rectangular sleeve 302. The rectangular slides 305 slide within the rectangular sleeve 302 to achieve clamping or loosening. The outer end of each rectangular slide 305 is connected to the inner wall of the aviation pipe 109 through a clamping assembly.

[0037] A pair of symmetrically distributed I-shaped slide rails 201 are fixed on both sides of the top surface of the hollow plate 200. The I-shaped slide rails 201 provide guidance and support for the movement of the U-shaped slide plate 202. Each I-shaped slide rail 201 is fixed to the fixed plate 300. A U-shaped slide plate 202 is slidably fitted on each I-shaped slide rail 201. The U-shaped slide plate 202 drives the connecting plate 203 and the Z-shaped clamping plate 204 to move, thereby adjusting the clamping position of the outer wall. A swing arm mechanism is installed between the U-shaped slide plate 202 and the I-shaped slide rail 201 on the same side.

[0038] A connecting plate 203 is fixedly provided in the middle of the top surface of each U-shaped slide 202. The connecting plate 203 connects the U-shaped slide 202 and the Z-shaped clamping plate 204, and transmits the movement of the U-shaped slide 202 to the Z-shaped clamping plate 204. A Z-shaped clamping plate 204 is fixedly provided on the top end of each connecting plate 203. The Z-shaped clamping plate 204 is pressed against both sides of the aviation pipe 109 through the V-shaped notch 205 to achieve outer wall clamping. A V-shaped notch 205 is opened on the top of each Z-shaped clamping plate 204. The V-shaped notch 205 plays a preliminary clamping and fixing role. A first laser rangefinder 206 is installed inside, and a pair of V-shaped notches 205 are respectively pressed against both sides of the aviation pipe 109.

[0039] In the specific implementation process, Figure 5 and Figure 8 As shown, a pair of symmetrically distributed rectangular sliding holes are opened on both sides of the elliptical connecting plate 106, and a pair of symmetrically distributed fixed slides 102 are fixed on both sides of the bottom surface of the fixed plate 300. The fixed slides 102 limit the movement direction of the elliptical connecting plate 106 so that the elliptical connecting plate 106 can only slide along them. The bottom end of each fixed slide 102 slides through the corresponding rectangular sliding hole and is fixed to the top surface of the bottom plate 100;

[0040] A threaded barrel 108 is fixedly provided in the middle of the elliptical connecting plate 106. The threaded barrel 108 converts the rotational motion of the lead screw 104 into the up and down translation of the elliptical connecting plate 106. A threaded lead screw 104 is inserted into the threaded barrel 108. The lead screw 104 rotates under the drive of the servo motor 103 and drives the elliptical connecting plate 106 and the fixed shaft 105 to move by cooperating with the threaded barrel 108. The top end of the lead screw 104 is coaxially fixed to the bottom end of the fixed shaft 105.

[0041] A square through hole is opened in the middle of the top surface of the base plate 100, and a servo motor 103 with the output end facing upward is fixedly installed inside the square through hole. The servo motor 103 provides power to drive the screw 104 to rotate, and is the power source for the movement of the entire mechanism. The motor shaft end of the servo motor 103 is coaxially fixed to the bottom end of the screw 104.

[0042] It should be noted that in this embodiment, a first notch is opened in the middle of the V-shaped notch 205. A first laser rangefinder 206 is fixedly installed inside the first notch. The laser emitting end of the first laser rangefinder 206 is perpendicular to the outer wall of the aviation tube 109. The first laser rangefinder 206 emits laser light toward the outer wall of the aviation tube 109 to measure data related to the outer diameter.

[0043] A pair of second notches are formed at the outer ends of the pair of rectangular slides 305 on the left and right sides. Second laser rangefinders 307 are fixedly installed inside the second notches. The laser emitting end of the second laser rangefinder 307 is perpendicular to the inner wall of the aviation tube 109. The second laser rangefinder 307 emits laser light toward the inner wall of the aviation tube 109 to measure data related to the inner diameter.

[0044] A pair of symmetrically distributed U-shaped plates 101 are fixed on both sides of the top surface of the base plate 100. The U-shaped plates 101 connect the base plate 100 and the hollow plate 200 to support the hollow plate 200. The two sides of the bottom surface of the hollow plate 200 are respectively fixed to a pair of U-shaped plates 101. Support legs are fixed at the four corners of the bottom surface of the base plate 100. Several equally distributed first anti-slip grooves are opened on the two side walls of the V-shaped notch 205, and several equally distributed second anti-slip grooves are opened on the outer side of the rubber splint 309.

[0045] The working principle of this embodiment is as follows: First, the aviation tube 109 is stably placed on the fixed plate 300, ensuring that the aviation tube 109 and the hollow ring 301 are concentrically distributed. Then, the servo motor 103 is started, and the motor shaft of the servo motor 103 begins to rotate, driving the lead screw 104, which is fixedly connected to the bottom end of the servo motor 103 and the fixed shaft 105, which is fixedly connected to the top end of the lead screw 104, to rotate synchronously.

[0046] Since the lead screw 104 is threadedly connected to the threaded barrel 108 fixed in the middle of the elliptical connecting plate 106, as the lead screw 104 rotates, the threaded barrel 108 drives the elliptical connecting plate 106 to slide downward along the pair of fixed slides 102 under the action of the thread transmission; the elliptical connecting plate 106 drives the U-shaped slide 202 to translate inward along the I-shaped slide rail 201 through the swing arm mechanism, and the connecting plate 203 and Z-shaped clamping plate 204 fixed on the top surface of the U-shaped slide 202 also translate toward the aviation pipe 109 synchronously. Finally, the pair of Z-shaped clamping plates 204 with V-shaped notches 205 are pressed against the outer walls of the aviation pipe 109 on both sides, thereby achieving preliminary clamping and fixing of the aviation pipe 109;

[0047] At the same time, as the fixed shaft 105 descends, the rectangular slide 305 is driven by the clamping assembly to slide outward along the rectangular sleeve 302. The rectangular sleeve 302 is fixed to the inner surface of the hollow ring 301. Each rubber splint 309 then rests on the inner wall of the aviation pipe 109, forming a secondary clamping fixation for the aviation pipe 109, ensuring that the aviation pipe 109 is stable and does not shake during the measurement process.

[0048] After the double clamping and fixation of the aviation pipe 109 is completed, the measurement work is immediately carried out. The first laser rangefinder 206 is installed in the first notch in the middle of the V-shaped notch 205, and its laser emitting end is perpendicular to the outer wall of the aviation pipe 109; the second laser rangefinder 307 is located in the second notch at the outer end of the rectangular slide 305 on the left and right sides, and its laser emitting end is perpendicular to the inner wall of the aviation pipe 109; the first laser rangefinder 206 and the second laser rangefinder 307 simultaneously emit laser pulses to the inner and outer walls of the aviation pipe 109. Using the principle of pulse laser ranging, by measuring the time t from the light pulse being emitted to the light pulse being reflected by the target and returning to the receiver, combined with the propagation speed c of light in air, according to the formula , calculate the inner and outer diameter dimensions of the aviation pipe 109, and then obtain the wall thickness dimension of the aviation pipe 109, to achieve accurate measurement.

[0049] Example 2: Based on Example 1, this example improves the structure of the clamping assembly and utilizes the coordination of parts such as the T-shaped slide bar 310 and the tension spring 311 to solve the problems of insufficient clamping force and poor stability of the inner wall of the aviation tube 109, thereby achieving more reliable fixation of the aviation tube 109. The invention also includes:

[0050] In the specific implementation process, Figure 7 and Figure 8 As shown, the clamping assembly includes a T-shaped slide bar 310 and a rubber splint 309. The outer end of the rectangular slide 305 is fixed with a vertically distributed fixed connecting plate 308. The fixed connecting plate 308 provides an installation and sliding basis for the T-shaped slide bar 310. A pair of positioning sliding holes are opened at the top and middle of the fixed connecting plate 308. A T-shaped slide bar 310 is slidably inserted into the interior of each positioning sliding hole. The T-shaped slide bar 310 is connected to the rubber splint 309 and moves with the rectangular slide 305 and fits the rubber splint 309 under the action of the tension spring 311. The outer ends of a pair of T-shaped slide bars 310 are respectively fixed to the upper and lower ends of the rubber splint 309. The rubber splint 309 is firmly clamped under the action of the tension spring 311. The anti-slip groove on the outer side enhances the friction. The outer side of the rubber splint 309 is against the inner wall of the aviation pipe 109. The outer end of each T-shaped slide bar 310 is sleeved with a tension spring 311. The tension spring 311 causes the rubber splint 309 to fit closely to the inner wall of the aviation pipe 109 through elastic tension, thereby enhancing the clamping force.

[0051] The middle part of the fixed plate 300 is rotated and inserted with a fixed shaft 105 that is distributed throughout. The fixed shaft 105 is coaxially fixed to the lead screw 104 and rotates with it, driving the turntable 303 in the clamping assembly to rotate, thereby driving the rectangular slide 305 to slide. The top part of the fixed shaft 105 is sleeved with a concentrically fixed turntable 303. The turntable 303 rotates with the fixed shaft 105 and drives the rectangular slide 305 to slide through the arc pin hole 304 and the limit pin shaft 306. There are four evenly spaced holes on the turntable 303. The distributed arc-shaped pin holes 304 cooperate with the limit pin shaft 306. When the turntable 303 rotates, the limit pin shaft 306 is driven and the rectangular slide 305 is driven to slide. A limit pin shaft 306 is slidably inserted into the interior of each arc-shaped pin hole 304. The limit pin shaft 306 transmits the power of the turntable 303 to the rectangular slide 305. A U-shaped notch is opened at the end of each rectangular slide 305, and each limit pin shaft 306 is fixedly inserted in the corresponding U-shaped notch.

[0052] The working principle of this embodiment is as follows: when the fixed shaft 105 begins to rotate, the rotating disk 303, which is concentrically fixed thereto, rotates synchronously therewith. The evenly distributed arc-shaped pin holes 304 on the rotating disk 303 cooperate with the limiting pins 306 to form a precise limiting guide mechanism. As the arc-shaped pin holes 304 rotate, the limiting pins 306 are driven by them, thereby driving the rectangular slide 305 to slide outward along the rectangular sleeve 302.

[0053] At this time, the fixed connecting plate 308 fixed to the outer end of the rectangular slide 305, as well as the pair of T-shaped slide bars 310 and the rubber clamping plate 309 connected to the fixed connecting plate 308 through the positioning slide holes, also move outward together; the tension spring 311 mounted on the outer end of the T-shaped slide bar 310 starts to work after the rubber clamping plate 309 contacts the inner wall of the aviation pipe 109, and its elastic tension forces the rubber clamping plate 309 to fit tightly against the inner wall of the pipe, thereby achieving a stable clamping.

[0054] As the fixed shaft 105 and the turntable 303 continue to rotate, the T-shaped slide bar 310 slides further in the positioning slide hole, and the tension spring 311 is continuously compressed and deformed, continuously increasing the clamping force of the rubber splint 309 on the inner wall of the aviation pipe 109, thereby ensuring that the aviation pipe 109 always remains stable during the measurement process, avoiding affecting the measurement accuracy due to loose clamping.

[0055] Example 3: Based on Example 2, this example focuses on optimizing the swing arm mechanism. By designing the L-shaped swing arm 209, the first elliptical pin hole 210, the second elliptical pin hole 211, and the first pin shaft 207 and the second pin shaft 107, the problem of insufficient transmission stability and poor positioning accuracy during the clamping process of the outer wall of the aviation pipe 109 is solved, achieving a more stable and precise clamping action. The following also includes:

[0056] In the specific implementation process, Figure 4 and Figure 5 As shown, the swing arm mechanism includes an L-shaped swing arm 209, and a pair of symmetrically distributed fixed pins 208 are rotatably inserted at the front and rear sides of the I-shaped slide rail 201. The fixed pins 208 serve as the hinge axis of the L-shaped swing arm 209, so that the L-shaped swing arm 209 can swing around it. The outer end of each fixed pin 208 is fixed with an L-shaped swing arm 209, and the L-shaped swing arm 209 connects the elliptical connecting plate 106 and the U-shaped slide plate 202, converting the translation of the elliptical connecting plate 106 into the sliding of the U-shaped slide plate 202. The top portion of each L-shaped swing arm 209 is provided with a first elliptical pin hole 210, and the front and rear sides of the U-shaped slide plate 202 are fixed with a pair of symmetrically distributed first pins 207, and the outer end of each first pin 207 is slidably inserted in the first elliptical pin hole 210 on the same side. The first pin 207 is slidably inserted in the first elliptical pin hole 210 to transmit the power of the L-shaped swing arm 209 to the U-shaped slide plate 202;

[0057] The bottom end of each L-shaped swing arm 209 is provided with a second elliptical pin hole 211, and a suspended elliptical connecting plate 106 is provided between the bottom plate 100 and the fixed plate 300. The elliptical connecting plate 106 converts the rotational motion of the screw 104 into the sliding of the U-shaped slide 202. The two ends of the elliptical connecting plate 106 are respectively located between the bottom ends of the two pairs of L-shaped swing arms 209. The two ends of the elliptical connecting plate 106 are fixed with a pair of second pin shafts 107 distributed through them. The two ends of each second pin shaft 107 are slidably inserted in the corresponding second elliptical pin hole 211. The second pin shaft 107 is slidably inserted in the second elliptical pin hole 211 to transmit the power of the elliptical connecting plate 106 to the L-shaped swing arm 209.

[0058] The working principle of this embodiment is as follows: when the elliptical connecting plate 106 moves downward in a coordinated manner under the coordinated action of the servo motor 103, the lead screw 104 and other components, the second pins 107 fixed at both ends of the elliptical connecting plate 106 cooperate with the second elliptical pin holes 211 at the bottom end of the L-shaped swing arm 209. With the help of a sophisticated limit guide mechanism, the L-shaped swing arm 209 is guided to swing with the fixed pin 208 as the axis.

[0059] During the swinging process of the L-shaped swing arm 209, the first elliptical pin hole 210 at its top end forms a precise limiting constraint relationship with the first pin shafts 207 on the front and rear sides of the U-shaped slide 202. As the L-shaped swing arm 209 swings, the first elliptical pin hole 210 drives the first pin shafts 207, driving the U-shaped slide 202 to slide smoothly inward along the I-shaped slide rail 201.

[0060] The sliding of the U-shaped slide 202 further drives the connecting plate 203 and the Z-shaped clamping plate 204 fixed on its top surface to move synchronously, and finally a pair of Z-shaped clamping plates 204 with V-shaped notches 205 are accurately pressed against the two sides of the outer wall of the aviation pipe 109, thereby achieving a stable and precise clamping action on the outer wall of the aviation pipe 109, providing a reliable positioning basis for the subsequent pipe diameter and wall thickness measurement.

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for measuring the diameter and wall thickness of aviation pipes, comprising a base plate (100), a clamping assembly, and a swing arm mechanism, characterized in that: A hollow plate (200) is provided above the bottom plate (100) and is arranged in parallel. A rectangular through hole is provided in the middle of the hollow plate (200). A fixed plate (300) is fixed in the middle of the top surface of the hollow plate (200). A hollow ring (301) is fixed in the middle of the top surface of the fixed plate (300). An aviation pipe (109) is placed on the fixed plate (300) and is arranged concentrically with the hollow ring (301). The inner ring surface of the hollow ring (301) is fixed with four evenly distributed rectangular sleeves (302), and a rectangular slide (305) is slidably inserted into the interior of each rectangular sleeve (302), and the outer end of each rectangular slide (305) is connected to the inner wall of the aviation pipe (109) through a clamping assembly; A pair of symmetrically distributed I-shaped slide rails (201) are fixed on both sides of the top surface of the hollow plate (200), each of the I-shaped slide rails (201) is fixed to the fixed plate (300), and a U-shaped slide plate (202) is slidably fitted on each of the I-shaped slide rails (201), and a swing arm mechanism is installed between the U-shaped slide plate (202) and the I-shaped slide rail (201) on the same side; A connecting plate (203) is fixedly provided at the middle of the top surface of each U-shaped slide plate (202), a Z-shaped clamping plate (204) is fixedly provided at the top end of each connecting plate (203), a V-shaped notch (205) is provided at the top of each Z-shaped clamping plate (204), and a pair of V-shaped notches (205) are respectively abutted against two sides of the aviation pipe (109); The clamping assembly includes a T-shaped slide bar (310) and a rubber splint (309). The outer end of the rectangular slide plate (305) is fixed with a vertically distributed fixed connecting plate (308). A pair of positioning sliding holes are opened at the top and middle of the fixed connecting plate (308). A T-shaped slide bar (310) is slidably inserted into the interior of each of the positioning sliding holes, and the outer ends of the pair of T-shaped slide bars (310) are respectively fixed to the upper and lower ends of the rubber splint (309). The outer side surface of the rubber splint (309) is against the inner wall of the aviation pipe (109). The outer end portion of each T-shaped slide bar (310) is sleeved with a tension spring (311).

2. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 1, characterized in that: A fixed shaft (105) is rotatably inserted into the middle of the fixed plate (300), and a concentrically fixed turntable (303) is sleeved on the top end of the fixed shaft (105). Four evenly distributed arc-shaped pin holes (304) are provided on the turntable (303), and a limiting pin (306) is slidably inserted into the interior of each of the arc-shaped pin holes (304). A U-shaped notch is provided at the end of each rectangular slide plate (305), and each limiting pin (306) is fixedly inserted in the corresponding U-shaped notch.

3. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 2, characterized in that: The swing arm mechanism comprises an L-shaped swing arm (209), a pair of symmetrically distributed fixed pins (208) are rotatably inserted on the front and rear sides of the I-shaped slide rail (201), an L-shaped swing arm (209) is fixed to the outer end of each fixed pin (208), a first elliptical pin hole (210) is opened at the top end of each L-shaped swing arm (209), and a pair of symmetrically distributed first pins (207) are fixed on the front and rear sides of the U-shaped slide plate (202), and the outer end of each first pin (207) is slidably inserted into the first elliptical pin hole (210) on the same side.

4. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 3, characterized in that: A second elliptical pin hole (211) is provided at the bottom end of each L-shaped swing arm (209), and an elliptical connecting plate (106) is provided between the bottom plate (100) and the fixed plate (300). The two ends of the elliptical connecting plate (106) are respectively located between the bottom ends of the two pairs of L-shaped swing arms (209). A pair of second pin shafts (107) are fixedly provided at the two ends of the elliptical connecting plate (106) and are distributed therethrough. The two ends of each second pin shaft (107) are slidably inserted into the corresponding second elliptical pin hole (211).

5. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 4, characterized in that: A pair of symmetrically distributed rectangular sliding holes are provided on both sides of the elliptical connecting plate (106), and a pair of symmetrically distributed fixed slide plates (102) are fixed on both sides of the bottom surface of the fixed plate (300). The bottom end of each fixed slide plate (102) slides through the corresponding rectangular sliding hole and is fixed to the top surface of the bottom plate (100).

6. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 5, characterized in that: A threaded barrel (108) is fixedly provided in the middle of the elliptical connecting plate (106), a threaded screw (104) is inserted into the interior of the threaded barrel (108), and the top end of the screw (104) is coaxially fixedly connected to the bottom end of the fixed shaft (105).

7. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 6, characterized in that: A square through hole is provided in the middle of the top surface of the bottom plate (100), and a servo motor (103) with its output end facing upward is fixedly installed inside the square through hole. The motor shaft end of the servo motor (103) is coaxially fixedly connected to the bottom end of the lead screw (104).

8. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 7, characterized in that: A first notch is provided in the middle of the V-shaped notch (205), a first laser rangefinder (206) is fixedly installed inside the first notch, and a laser emitting end of the first laser rangefinder (206) is perpendicular to the outer wall of the aviation tube (109). A pair of second notches are provided at the outer ends of a pair of rectangular slides (305) on the left and right sides, and a second laser rangefinder (307) is fixedly installed inside the second notch, and a laser emitting end of the second laser rangefinder (307) is perpendicular to the inner wall of the aviation tube (109).

9. The mechanism for measuring diameter and wall thickness of aviation pipes according to claim 8, characterized in that: A pair of symmetrically distributed U-shaped plates (101) are fixed on both sides of the top surface of the bottom plate (100), and both sides of the bottom surface of the hollow plate (200) are fixed to the pair of U-shaped plates (101). Support legs are fixed at the four corners of the bottom surface of the bottom plate (100), and a plurality of equally distributed first anti-slip grooves are opened on the inner side walls of the V-shaped notch (205), and a plurality of equally distributed second anti-slip grooves are opened on the outer side surface of the rubber splint (309).

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