Coordinate measuring machine for measuring special-shaped workpieces

Abstract

The present invention provides a three-dimensional coordinate measuring machine for measuring special-shaped workpieces, which includes: a placement component and a measuring component, the top surface of the placement component is slidably connected to a lifting component, the translation component is composed of a moving mechanism and an adjustment mechanism, and the adjustment mechanism is rotatably connected to the bottom of the moving mechanism, the measuring component is rotatably connected to the side wall of the adjustment mechanism, the measuring component is composed of a guide column and a measuring rod, and one end of the measuring rod is fixedly connected to the guide column. The present application can realize multi-point detection of the workpiece, adjust the probe to any position through a horizontal rotating seat and a vertical rotating seat, and make the probe stop quickly when it approaches the workpiece position, thereby ensuring the speed of each measurement, improving measurement efficiency, and ensuring that the measuring rod will not have bumping problems. The measuring rod is set to a bent structure so that it can be suitable for the complex surface of the special-shaped workpiece, so that the probe can reach the complex surface of the special-shaped workpiece, and cooperate with the rotating seat to realize measurement of any position of the workpiece, thereby improving the performance of the three-dimensional coordinate measuring machine.

Description

Technical Field

[0001] The invention relates to a three-coordinate measuring machine for measuring special-shaped workpieces, and belongs to the technical field of three-coordinate measuring machines. Background Art

[0002] A three-dimensional coordinate measuring machine (CMM) is a high-precision measuring device with widespread application in multiple fields. It uses a probe system to probe a workpiece, returning surface point data. Using three-dimensional coordinate software systems (such as AC-DMIS), a CMM can calculate various geometric shapes, dimensions, and other measurement capabilities. Its operating principle is to place the part under test within a three-dimensional measurable space and accurately measure the three coordinate positions of points on the surface of the part. These coordinate values ​​are then processed by a computer to form measurement elements (such as circles, spheres, cylinders, cones, and curved surfaces). Mathematical calculations then reveal their shape, positional tolerances, and other geometric quantities. Within the confines of a hexahedron, the CMM can measure geometric shapes, lengths, and circular indexes. Measurements are performed along three coordinate axes (X, Y, and Z).

[0003] Before measurement, a coordinate system must be established. Typically, a rectangular coordinate system is used, with the origin of the coordinate system at the center of the measuring machine. The three coordinate axes are perpendicular and parallel to each other. A coordinate measuring machine uses an electronic control system to accurately move the measuring probe, which is mechanically connected to the measuring machine's motion system. When the probe contacts the surface of an object, the measuring instrument reads the corresponding coordinate values ​​and converts them into digital signals. These coordinate values ​​can represent information such as the object's position, shape, and size. The measuring instrument processes the collected coordinate data, calculating and analyzing it to obtain the desired measurement results, such as length, angle, and curve. These results are typically output digitally and displayed on the measuring machine's display or through computer software for further processing and analysis.

[0004] The three-dimensional coordinate measuring machine is a high-efficiency and high-precision measuring instrument that measures workpieces through multi-dimensional movement. However, when measuring complex and irregular workpieces, it is difficult to adapt to the structure of the workpiece for rapid measurement due to the special structure. In particular, after the irregular workpiece is fixed, the bottom of the workpiece forms the required measuring surface, and the space between the formed measuring surface and the platform is small, which will cause the probe of the measuring machine to be unable to reach smoothly, causing inconvenience in measuring irregular workpieces. In addition, since there are many measuring surfaces on irregular workpieces, the probe's moving speed needs to be reduced during probe detection to solve possible collision problems, resulting in a significant reduction in efficiency during multi-point measurement, affecting the performance of the three-dimensional coordinate measuring machine. Summary of the Invention

[0005] In order to solve the technical problem that a three-coordinate measuring machine is difficult to effectively measure special-shaped workpieces, the present invention provides a three-coordinate measuring machine for measuring special-shaped workpieces.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a three-coordinate measuring machine for measuring special-shaped workpieces, the three-coordinate measuring machine for measuring special-shaped workpieces comprising:

[0008] A placement assembly, wherein the top surface of the placement assembly is slidably connected to a lifting assembly, the lifting assembly is connected to the crossbeam, and the crossbeam surface is slidably connected to the translation assembly, the translation assembly is composed of a moving mechanism and an adjustment mechanism, and the adjustment mechanism is rotatably connected to the bottom of the moving mechanism;

[0009] The measuring assembly is rotatably connected to the side wall of the adjustment mechanism. The measuring assembly consists of a guide column and a measuring rod. One end of the measuring rod is fixedly connected to the guide column, and the other end of the measuring rod is fixedly connected to a probe that contacts the workpiece, and the measuring rod is provided with a bending portion.

[0010] In this technical solution, the placement component is composed of a platform, and the surface of the platform is fixedly connected to the track and the limit plate respectively. There are two tracks and two limit plates, which are symmetrically distributed on both sides of the platform. The track surface is slidably connected with a lifting component, and the cross-sections of the track and the limit plate are both T-shaped structures. A clamping mechanism is provided on the top surface of the platform between the two limit plates, and the outer side of the top of the limit plate is in contact with the lifting component.

[0011] In the present technical solution, the clamping mechanism includes a clamping plate, which is slidingly connected to the platform surface, and both ends of the clamping plate are located inside the limit plate. The inner sides of both ends of the limit plate are fixedly connected to the side plates, one of the side plates is fixedly connected to a drive motor, the output end of the drive motor is fixedly connected to the lead screw, and both ends of the lead screw are rotatably connected to the inside of the side plate, both ends of the lead screw are threadedly connected to the clamping plate, and the spiral directions of the two ends of the lead screw are opposite.

[0012] In the present technical solution, the lifting assembly includes a slide, a column and a slider. The slide is slidably connected to the track surface. The slide is a U-shaped structure and is fixedly connected to the bottom of the column. The inner wall of the column is fixedly connected with symmetrically distributed guide columns. The slider is slidably connected to the inside of the column, and the slider is engaged and slidably engaged with the surface of the guide column. A lifting cylinder located inside the column is fixedly installed at the bottom of the slide. The telescopic end of the lifting cylinder is fixedly connected to the slider, and the side wall of the slider is fixedly connected to the transverse movement mechanism.

[0013] In the present technical solution, the transverse movement mechanism is composed of a cross beam, a cross bar and a limit rod, and both ends of the cross beam, cross bar and limit rod are fixedly connected to the side wall of the slider, and the cross beam is located on both sides of the cross bar and the limit rod. The surfaces of the cross beam, cross bar and limit rod are all slidably connected to the moving mechanism, and a convex rib is fixedly connected to the top of the cross beam. The moving mechanism is composed of a sliding sleeve, and the side wall of the sliding sleeve is fixedly connected to a guide plate with a U-shaped structure, and the guide plate is slidably connected to the surface of the convex rib. The two sides of the bottom of the sliding sleeve are respectively fixedly connected to the guide sleeve and the baffle, and the guide sleeve is a square hollow structure and is slidably connected to the surface of the cross bar, and the baffle is correspondingly arranged on one side of the guide sleeve.

[0014] In this technical solution, the adjustment mechanism consists of a precision cylinder, a horizontal rotating seat and a vertical rotating seat. The precision cylinder is fixedly connected to the top of the sliding sleeve. The telescopic end of the precision cylinder passes through the sliding sleeve and is located between the limit rod and the guide sleeve. The telescopic end of the precision cylinder is fixedly connected to the first stepper motor. The output end of the first stepper motor is fixedly connected to the horizontal rotating seat. A second stepper motor is fixedly installed inside the horizontal rotating seat, and the output end of the second stepper motor is fixedly connected to the vertical rotating seat. The vertical rotating seat is rotatably connected to the side wall of the horizontal rotating seat.

[0015] In this technical solution, an identification camera is fixedly connected to the surface of the vertical rotating seat, and the surfaces of the vertical rotating seat located on both sides of the identification camera are fixedly connected to the acceleration sensor and the speed controller respectively. The acceleration sensor and the speed controller are electrically connected to the drive equipment of the three-coordinate measuring machine, and the identification camera is correspondingly arranged on one side of the measuring component. A third stepper motor is fixedly installed inside the vertical rotating seat, and the output end of the third stepper motor is fixedly connected to the measuring component, and the measuring component is rotationally connected to one side of the vertical rotating seat.

[0016] In this technical solution, a limiting sleeve is fixedly connected to one side of the vertical rotating seat close to the measuring component. The limiting sleeve is an annular structure and is embedded in the guide column, and the guide column is rotatably connected to the surface of the limiting sleeve.

[0017] In this technical solution, one end of the guide column close to the vertical rotating seat is fixedly connected to an end head, and a number of evenly distributed infrared rangefinders are fixedly connected to the side wall of the end head, and the infrared rangefinders are electrically connected to the drive equipment of the three-coordinate measuring machine. The other end of the guide column is fixedly connected to a reinforcement mechanism, and the reinforcement mechanism and the infrared rangefinder are staggered.

[0018] In the present technical solution, the reinforcement mechanism includes a reinforcement rod, which is fixedly connected to the surface of the guide column. One end of the reinforcement rod is fixedly connected to the measuring rod through a locking sleeve. Several connecting blocks are provided on the surface of the reinforcement rod, and each connecting block is fixedly connected to the measuring rod with a bending structure. The end of the measuring rod close to the probe is coaxially distributed with the guide column, and the angle of the bending portion of the measuring rod is 90°. The reinforcement rod is a bending structure and is distributed parallel to the far end of the measuring rod.

[0019] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0020] The positive progress effect of the present invention is:

[0021] The three-dimensional coordinate measuring machine for measuring special-shaped workpieces proposed above adopts a method of placing components to realize the workpiece, and realizes stable fixation of the workpiece through a clamping mechanism, and uses a lifting component and a translation component to drive the measuring probe to contact the surface of the workpiece to realize multi-point detection of the workpiece, and adjusts the position of the probe through a horizontal rotating seat and a vertical rotating seat to realize arbitrary angle adjustment, so that the probe can smoothly reach any position of the special-shaped workpiece, and the probe can stop quickly when it approaches the workpiece position, ensuring the speed of each measurement to improve measurement efficiency, and at the same time solving the problem of damage caused by the probe colliding with the special-shaped workpiece, and by monitoring around the probe, ensuring that the measuring rod will not be bumped, effectively improving the ease of use of the measuring machine, setting the measuring rod to a bent structure can make it suitable for the complex surface of the special-shaped workpiece, so that the probe can smoothly reach the complex measuring surface of the special-shaped workpiece, and cooperate with the rotating seat to realize measurement of any position of the workpiece, improving the measurement performance of the measuring machine, and ensuring the stability of the measuring rod during movement, thereby improving the performance of the three-dimensional coordinate measuring machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the translation component of the present invention.

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the locally enlarged structure at point A in the middle.

[0025] Figure 4 It is a schematic diagram of the external front view structure of the present invention.

[0026] Figure 5 It is a schematic diagram of the external top view structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the measuring component of the present invention.

[0028] Figure 7 This is a schematic diagram of the top view of the measurement component of the present invention.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the guide column of the present invention.

[0030] Figure 9 It is a side view structural diagram of the measuring component of the present invention.

[0031] Figure 10 It is a schematic diagram of the internal three-dimensional structure of the measuring component of the present invention.

[0032] Description of Reference Numerals

[0033] 100, placement assembly; 101, platform; 102, track; 103, limit plate; 104, side plate; 105, drive motor; 106, lead screw; 107, clamping plate; 200, lifting assembly; 201, slide; 202, column; 203, guide column; 204, slider; 205, lifting cylinder; 206, crossbeam; 207, crossbar; 208, limit rod; 209, rib; 300, translation assembly; 301, sliding sleeve; 302, guide sleeve; 303, guide plate; 304, baffle; 30 5. Precision cylinder; 306. First stepper motor; 307. Horizontal rotating seat; 308. Second stepper motor; 309. Vertical rotating seat; 310. Recognition camera; 311. Acceleration sensor; 312. Speed ​​controller; 313. Limit sleeve; 400. Measuring component; 401. Guide column; 402. Third stepper motor; 403. End; 404. Infrared rangefinder; 405. Measuring rod; 406. Probe; 407. Bending part; 408. Reinforcement rod; 409. Locking sleeve; 410. Connecting block. DETAILED DESCRIPTION

[0034] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0035] like Figures 1-10 As shown, the three-coordinate measuring machine for measuring special-shaped workpieces includes:

[0036] A placement assembly 100, wherein the top surface of the placement assembly 100 is slidably connected to a lifting assembly 200, the lifting assembly 200 is connected to a beam 206, and the surface of the beam 206 is slidably connected to a translation assembly 300, the translation assembly 300 is composed of a moving mechanism and an adjustment mechanism, and the adjustment mechanism is rotatably connected to the bottom of the moving mechanism;

[0037] The measuring assembly 400 is rotatably connected to the side wall of the adjustment mechanism. The measuring assembly 400 consists of a guide column 401 and a measuring rod 405. One end of the measuring rod 405 is fixedly connected to the guide column 401, and the other end of the measuring rod 405 is fixedly connected to a probe 406 that contacts the workpiece, and the measuring rod 405 is provided with a bending portion 407.

[0038] The placement component 100 is composed of a platform 101, the surface of the platform 101 is fixedly connected to the track 102 and the limit plate 103, the number of the track 102 and the limit plate 103 are two and symmetrically distributed on both sides of the platform 101, the surface of the track 102 is slidably connected to the lifting component 200, and the cross-sections of the track 102 and the limit plate 103 are T-shaped structures. The top surface of the platform 101 located between the two limit plates 103 is provided with a clamping mechanism, and the outer side of the top of the limit plate 103 is in contact with the lifting component 200; the clamping mechanism The mechanism includes a splint 107, which is slidingly connected to the surface of the platform 101, and both ends of the splint 107 are located inside the limit plate 103, and the inner sides of both ends of the limit plate 103 are fixedly connected to the side plates 104, one of the side plates 104 is fixedly connected to a drive motor 105, and the output end of the drive motor 105 is fixedly connected to the screw 106, and both ends of the screw 106 are rotatably connected to the inside of the side plate 104, and both ends of the screw 106 are threadedly connected to the splint 107, and the spiral directions of the two ends of the screw 106 are opposite.

[0039] In this technical solution, the stable movement of the slide 201 is achieved through the track 102. The driving device arranged on the slide 201 can drive the column 202 to realize longitudinal movement on the platform 101. Before measurement, the special-shaped workpiece is placed on the surface of the platform 101. When the lead screw 106 is driven by the driving motor 105 to rotate between the side plates 104, it drives the clamping plate 107 to clamp and fix the special-shaped workpiece, and then the position is adjusted with the mobile lifting assembly 200 to realize rapid measurement of the special-shaped workpiece.

[0040] The lifting assembly 200 includes a slide 201, a column 202 and a slider 204. The slide 201 is slidably connected to the surface of the track 102. The slide 201 is a U-shaped structure and is fixedly connected to the bottom of the column 202. The inner wall of the column 202 is fixedly connected with symmetrically distributed guide columns 203. The slider 204 is slidably connected to the inside of the column 202, and the slider 204 slides in engagement with the surface of the guide column 203. A lifting cylinder 205 located inside the column 202 is fixedly installed at the bottom of the slide 201. The telescopic end of the lifting cylinder 205 is fixedly connected to the slider 204, and the side wall of the slider 204 is fixedly connected to the transverse mechanism; the transverse mechanism is composed of a crossbeam 206, a crossbar 207 and a limit rod 208. The crossbeam 206 is fixedly connected to the crossbar 207 and the limit rod 208. 06. Both ends of the cross bar 207 and the limit rod 208 are fixedly connected to the side walls of the slider 204. The cross beam 206 is located on both sides of the cross bar 207 and the limit rod 208. The surfaces of the cross beam 206, the cross bar 207 and the limit rod 208 are all slidably connected to the moving mechanism, and the top of the cross beam 206 is fixedly connected with a rib 209. The moving mechanism is composed of a sliding sleeve 301. The side wall of the sliding sleeve 301 is fixedly connected with a guide plate 303 with a U-shaped structure. The guide plate 303 is slidably connected to the surface of the rib 209. The two sides of the bottom of the sliding sleeve 301 are respectively fixedly connected to the guide sleeve 302 and the baffle 304. The guide sleeve 302 is a square hollow structure and is slidably connected to the surface of the cross bar 207, and the baffle 304 is correspondingly arranged on one side of the guide sleeve 302.

[0041] In this technical solution, the column 202 can drive the translation assembly 300 to move longitudinally synchronously, and drive the slider 204 to move inside the column 202 through the lifting cylinder 205, and realize the stable movement of the slider 204 through the guide column 203, so that the slider 204 drives the translation assembly 300 to move vertically to achieve height adjustment, and drives it to move on the surface of the beam 206 through the driving device on the sleeve 301. The stable movement of the sleeve 301 is achieved through the cooperation between the cross bar 207 and the guide sleeve 302 and the cooperation between the rib 209 and the guide plate 303. At the same time, the limit rod 208 and the baffle 304 cooperate to realize the stable movement of the sleeve 301, which can realize the adjustment of the lateral position of the probe 406 and ensure the accuracy during the movement.

[0042] The adjustment mechanism is composed of a precision cylinder 305, a horizontal rotating seat 307 and a vertical rotating seat 309. The precision cylinder 305 is fixedly connected to the top of the sliding sleeve 301. The telescopic end of the precision cylinder 305 passes through the sliding sleeve 301 and is located between the limit rod 208 and the guide sleeve 302. The telescopic end of the precision cylinder 305 is fixedly connected to the first stepper motor 306. The output end of the first stepper motor 306 is fixedly connected to the horizontal rotating seat 307. A second stepper motor 308 is fixedly installed inside the horizontal rotating seat 307, and the output end of the second stepper motor 308 is fixedly connected to the vertical rotating seat 309. The vertical rotating seat 309 is rotatably connected to the side wall of the horizontal rotating seat 307; an identification camera 310 is fixedly connected to the surface of the vertical rotating seat 309, which is located at the identification camera 31 0 The surfaces of the vertical rotating seat 309 on both sides are fixedly connected to the acceleration sensor 311 and the speed controller 312 respectively. The acceleration sensor 311 and the speed controller 312 are both electrically connected to the drive equipment of the three-dimensional coordinate measuring machine, and the recognition camera 310 is correspondingly arranged on one side of the measuring component 400. A third stepper motor 402 is fixedly installed inside the vertical rotating seat 309. The output end of the third stepper motor 402 is fixedly connected to the measuring component 400, and the measuring component 400 is rotatably connected to one side of the vertical rotating seat 309; the side of the vertical rotating seat 309 close to the measuring component 400 is fixedly connected to a limit sleeve 313. The limit sleeve 313 is an annular structure and is embedded in the guide column 401, and the guide column 401 is rotatably connected to the surface of the limit sleeve 313.

[0043] In this technical solution, after the position adjustment of the sleeve 301 is completed, the horizontal rotating seat 307 is driven downward by the precision cylinder 305 to realize the precise movement of the position of the probe 406, and the horizontal rotating seat 307 is driven to rotate in the horizontal direction by the first stepper motor 306, and the vertical rotating seat 309 is driven to rotate on the side wall of the horizontal rotating seat 307 by the second stepper motor 308 to adjust the rotation adjustment of the detection rod and the probe 406, so as to realize the adjustment of any position of the probe 406 above the platform 101, and the measuring rod 405 is driven to rotate by the third stepper motor 402 so that it can avoid the position of the special-shaped workpiece to realize the measurement of complex surfaces.

[0044] The guide column 401 is fixedly connected to one end of the vertical rotating seat 309 with an end 403, and the side wall of the end 403 is fixedly connected to a number of evenly distributed infrared rangefinders 404, and the infrared rangefinders 404 are electrically connected to the drive equipment of the three-dimensional coordinate measuring machine. The other end of the guide column 401 is fixedly connected to a reinforcement mechanism, and the reinforcement mechanism and the infrared rangefinders 404 are staggered; the reinforcement mechanism includes a reinforcement rod 408, and the reinforcement rod 408 is fixed to the surface of the guide column 401. Fixed connection, one end of the reinforcement rod 408 is fixedly connected to the measuring rod 405 through a locking sleeve 409, a plurality of connecting blocks 410 are provided on the surface of the reinforcement rod 408, and each connecting block 410 is fixedly connected to the measuring rod 405 of the bending structure, the end of the measuring rod 405 close to the probe 406 is coaxially distributed with the guide column 401, and the angle between the bending portion 407 of the measuring rod 405 is 90°, and the reinforcement rod 408 is a bending structure and is distributed parallel to the distal end of the measuring rod 405.

[0045] In the present technical solution, during measurement, the movement of the three coordinates is achieved by the movement of the slide 201, the slider 204 and the sleeve 301. When the probe 406 is driven to move to the irregular workpiece, the movement speed of the probe 406 is monitored by the acceleration sensor 311, and a rough judgment of the distance between the probe 406 and the irregular workpiece is made through the device camera. The position of the probe 406 after movement is determined by the movement of the acceleration sensor 311 and the probe 406. When the probe 406 moves close to the surface of the workpiece, the speed controller 312 controls the movement speed of the probe 406 to reduce, so that the probe 406 slowly contacts the surface of the workpiece to avoid the probe 406 moving too fast. This causes a collision problem, and the position of the detection point on the three-dimensional coordinate measuring machine is determined by measuring the speed and time; when measuring special-shaped workpieces, the infrared rangefinder 404 on the end 403 monitors the area around the measuring rod 405, so that the infrared rangefinder 404 monitors the area between it and the probe 406. When the measuring rod 405 moves, the infrared rangefinder 404 is blocked by an object. At this time, the infrared rangefinder 404 can receive the reflected signal, and it is determined that there may be a collision around the measuring rod 405 and the probe 406. At this time, the speed controller 312 is used to control the speed to be reduced to avoid the measuring rod 405 moving too fast and causing excessive collision with the workpiece.

[0046] Specifically, by setting the bending portion 407, the complex position of the special-shaped workpiece can be measured. When the measuring rod 405 is moved to the bottom of the workpiece, the third stepper motor 402 drives the measuring rod 405 to rotate, and cooperates with the movement of the three coordinates to enable the probe 406 to move to the bottom surface of the workpiece and rotate upward to contact the measuring surface of the special-shaped workpiece. For example, if a groove is formed on the bottom surface of the special-shaped workpiece and the plane of the groove needs to be measured, the measuring rod 405 can be extended into the bottom surface of the workpiece, and then the measuring rod 405 is avoided through the bending portion 407 through the rotation of the horizontal rotating seat 307 and the vertical rotating seat 309, so that the probe 406 can smoothly contact the measuring surface on the groove on the bottom surface of the workpiece, thereby improving the measurement efficiency and comprehensiveness, and the reinforcing block and the measuring rod 405 are stably fixed by the locking sleeve 409 and the connecting block 410, thereby improving the stability of the measuring rod 405 and the stability of the measuring rod 405 during the movement, thereby improving the measurement accuracy.

[0047] The present invention is not limited to the above-described embodiments. Any changes in shape or structure fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention. Such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. A three-dimensional coordinate measuring machine for measuring special-shaped workpieces, characterized in that: The three-coordinate measuring machine for measuring special-shaped workpieces includes: A placement component (100), wherein the top surface of the placement component (100) is slidably connected to a lifting component (200), the lifting component (200) is connected to a crossbeam (206), and the surface of the crossbeam (206) is slidably connected to a translation component (300), and the translation component (300) is composed of a moving mechanism and an adjustment mechanism, and the adjustment mechanism is rotatably connected to the bottom of the moving mechanism; A measuring assembly (400), the measuring assembly (400) being rotatably connected to a side wall of the adjustment mechanism, the measuring assembly (400) being composed of a guide post (401) and a measuring rod (405), one end of the measuring rod (405) being fixedly connected to the guide post (401), the other end of the measuring rod (405) being fixedly connected to a probe (406) in contact with a workpiece, and the measuring rod (405) being provided with a bending portion (407); The adjustment mechanism is composed of a precision cylinder (305), a horizontal rotating seat (307) and a vertical rotating seat (309), wherein the precision cylinder (305) is fixedly connected to the top of the sliding sleeve (301), the telescopic end of the precision cylinder (305) passes through the sliding sleeve (301) and is located between the limit rod (208) and the guide sleeve (302), the telescopic end of the precision cylinder (305) is fixedly connected to the first stepper motor (306), the output end of the first stepper motor (306) is fixedly connected to the horizontal rotating seat (307), a second stepper motor (308) is fixedly installed inside the horizontal rotating seat (307), and the output end of the second stepper motor (308) is fixedly connected to the vertical rotating seat (309), the vertical rotating seat (309) is fixedly connected to the horizontal rotating seat (30 7) Side wall rotation connection; the surface of the vertical rotating seat (309) is fixedly connected to an identification camera (310), and the surfaces of the vertical rotating seat (309) located on both sides of the identification camera (310) are respectively fixedly connected to an acceleration sensor (311) and a speed controller (312), and the acceleration sensor (311) and the speed controller (312) are both electrically connected to the drive device of the three-coordinate measuring machine, and the identification camera (310) is correspondingly arranged on one side of the measuring component (400), and a third stepping motor (402) is fixedly installed inside the vertical rotating seat (309), and the output end of the third stepping motor (402) is fixedly connected to the measuring component (400), and the measuring component (400) is rotationally connected to one side of the vertical rotating seat (309); One end of the guide column (401) close to the vertical rotating seat (309) is fixedly connected to an end head (403), a side wall of the end head (403) is fixedly connected to a plurality of evenly distributed infrared rangefinders (404), and the infrared rangefinders (404) are electrically connected to the drive equipment of the three-coordinate measuring machine, and the other end of the guide column (401) is fixedly connected to a reinforcement mechanism, and the reinforcement mechanism and the infrared rangefinders (404) are staggered; the reinforcement mechanism includes a reinforcement rod (408), and the reinforcement rod (408) is fixedly connected to the surface of the guide column (401). One end of the reinforcing rod (408) is fixedly connected to the measuring rod (405) through a locking sleeve (409), a plurality of connecting blocks (410) are provided on the surface of the reinforcing rod (408), and each connecting block (410) is fixedly connected to the measuring rod (405) of the bent structure, the end of the measuring rod (405) close to the probe (406) is coaxially distributed with the guide column (401), and the angle between the bent portion (407) of the measuring rod (405) is 90°, and the reinforcing rod (408) is a bent structure and is distributed parallel to the distal end of the measuring rod (405).

2. The three-coordinate measuring machine for measuring special-shaped workpieces according to claim 1, wherein: The placement component (100) is composed of a platform (101), the surface of the platform (101) is fixedly connected to the track (102) and the limit plate (103), the number of the track (102) and the limit plate (103) are both two and symmetrically distributed on both sides of the platform (101), the surface of the track (102) is slidably connected to the lifting component (200), and the cross-sections of the track (102) and the limit plate (103) are both T-shaped structures, the top surface of the platform (101) located between the two limit plates (103) is provided with a clamping mechanism, and the outer side of the top of the limit plate (103) is in contact with the lifting component (200).

3. The three-dimensional coordinate measuring machine for measuring special-shaped workpieces according to claim 2, wherein: The clamping mechanism includes a clamping plate (107), the clamping plate (107) is slidably connected to the surface of the platform (101), and both ends of the clamping plate (107) are located inside the limit plate (103), the inner sides of both ends of the limit plate (103) are fixedly connected to the side plates (104), one of the side plates (104) is fixedly connected to a driving motor (105), the output end of the driving motor (105) is fixedly connected to the lead screw (106), and both ends of the lead screw (106) are rotatably connected to the inside of the side plate (104), and both ends of the lead screw (106) are threadedly connected to the clamping plate (107), and the spiral directions of the two ends of the lead screw (106) are opposite.

4. The three-dimensional coordinate measuring machine for measuring special-shaped workpieces according to claim 1, wherein: The lifting assembly (200) includes a slide (201), a column (202) and a slider (204), wherein the slide (201) is slidably connected to the surface of the track (102), the slide (201) is a U-shaped structure and is fixedly connected to the bottom of the column (202), and the inner wall of the column (202) is fixedly connected with symmetrically distributed guide columns (203), the slider (204) is slidably connected to the inside of the column (202), and the slider (204) and the guide column (203) are engaged and slidably engaged, and a lifting cylinder (205) located inside the column (202) is fixedly installed at the bottom of the slide (201), the telescopic end of the lifting cylinder (205) is fixedly connected to the slider (204), and the side wall of the slider (204) is fixedly connected to the transverse movement mechanism.

5. The three-dimensional coordinate measuring machine for measuring special-shaped workpieces according to claim 4, characterized in that: The transverse movement mechanism is composed of a crossbeam (206), a crossbar (207) and a limit rod (208). Both ends of the crossbeam (206), the crossbar (207) and the limit rod (208) are fixedly connected to the side wall of the slider (204). The crossbeam (206) is located on both sides of the crossbar (207) and the limit rod (208). The surfaces of the crossbeam (206), the crossbar (207) and the limit rod (208) are all slidably connected to the moving mechanism, and the top of the crossbeam (206) is fixedly connected with a convex rib (209). ), the moving mechanism is composed of a sliding sleeve (301), the side wall of the sliding sleeve (301) is fixedly connected to a guide plate (303) of a U-shaped structure, the guide plate (303) is slidably connected to the surface of the rib (209), and the two sides of the bottom of the sliding sleeve (301) are respectively fixedly connected to the guide sleeve (302) and the baffle (304), the guide sleeve (302) is a square hollow structure and is slidably connected to the surface of the cross bar (207), and the baffle (304) is correspondingly arranged on one side of the guide sleeve (302).

6. The three-dimensional coordinate measuring machine for measuring special-shaped workpieces according to claim 1, wherein: The vertical rotating seat (309) is fixedly connected to a limiting sleeve (313) on one side close to the measuring component (400). The limiting sleeve (313) is an annular structure and is embedded in the guide column (401). The guide column (401) is rotatably connected to the surface of the limiting sleeve (313).

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