A ring-shaped parts shape detection device and its use method

Abstract

The present invention discloses an apparatus for detecting the shape of an annular part and a method for using the apparatus. The apparatus comprises a workbench, a supporting platform, a workpiece placement device, a CCD camera, and a transfer device. The supporting platform is arranged on one side of the workbench, the workpiece placement device is arranged above the workbench, a plurality of CCD cameras are mounted on the top of the workbench, the CCD cameras are used for photographing and comparing parts, the transfer device is mounted on the top of the workbench, and the transfer device is used for feeding parts. The present invention utilizes a configuration method in which the CCD camera and the transfer device are coordinated, and a lifting support assembly is used to facilitate the lowering of parts, placing them on a four-point supporting assembly, and supporting the parts through the four-point supporting assembly, so that the parts can wait for the operation of the next workstation under the support of the four-point supporting assembly. During this period, the linear moving mechanism can return to its original position, saving time and improving practicality.

Description

Technical Field

[0001] The present invention relates to the field of appearance detection equipment, and in particular to an appearance detection equipment for annular parts and a use method thereof. Background Art

[0002] Appearance inspection is an important and difficult part of geometric measurement. Currently, the commonly used appearance inspection method for single-piece and small-batch production is to use ordinary measuring tools such as calipers and micrometers in conjunction with human visual observation. The measured parts are all measured manually or manually using instruments. Batch measurement is labor-intensive, time-consuming, and has low measurement accuracy.

[0003] The CCD inspection of existing technology is more intelligent. The system uses a screw module to feed the parts, so that the parts are sent directly under the lens. The CCD takes an image of the part, which is then processed by a computer algorithm and compared with the appearance of the stored qualified workpiece photos to automatically identify qualified and unqualified products.

[0004] However, the existing screw module can only feed parts in a linear manner. The parts are carried on a slide connected to the screw nut and can only move linearly with the slide. When the parts need the next step of inspection, the screw module can only stop working and wait with the parts. Only after the robot on the next workstation removes the parts carried on the slide can the screw module be reset and wait for the next part that needs to be inspected for appearance, which wastes a lot of time and has low practicality. Summary of the Invention

[0005] The purpose of the present invention is to provide an annular part shape detection device and a method of using the same to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an apparatus for detecting the shape of an annular part and a method for using the same, the apparatus comprising a workbench, a carrying platform, a workpiece placement device, a CCD camera, and a transfer device, wherein the carrying platform is disposed on one side of the workbench, the workpiece placement device is disposed above the workbench, a plurality of CCD cameras are mounted on the top of the workbench, the CCD cameras are used to take photos of the parts for comparison, the transfer device is mounted on the top of the workbench, and the transfer device is used to feed the parts;

[0007] The method of using the appearance detection equipment includes the following specific steps:

[0008] Step 1: According to the diameter of the workpiece, the relative position between the two jigs is adaptively adjusted so that the sliding frame moves linearly under the limit of the fixed frame. After the position of the support block is moved, the bolt rod is threaded to tighten the handle on the friction member so that the friction member can fit with the surface of the fixed frame, thereby fixing the position of the adjusted jig and enabling the four-point load-bearing assembly to carry parts of different specifications.

[0009] Step 2: Place the part on a set of four-point load-bearing components, and then use the operation of the manipulator to grab the part and place it on the transfer device. The part is carried by the linear moving mechanism and the support mechanism. Then, the linear cylinder is operated to drive the limit seat to move upward, so that the limit seat drives the two load-bearing blocks to move upward synchronously. The two load-bearing blocks move upward synchronously to lift the part to a certain height so that the part does not contact the support mechanism. Then, the linear module is operated to drive the connecting component to perform linear translation movement, thereby realizing the linear translation drive of the lifting support component until the part is moved to the bottom of the CCD camera device. The CCD camera device can be used to take photos and compare the workpiece supported on the linear moving mechanism to realize the appearance inspection of the workpiece.

[0010] Step 3: Then, the linear module continues to operate to drive the linear motion of the workpiece until the workpiece is delivered to the four-point load-bearing assembly. The linear cylinder then continues to drive the load-bearing block to move downward, thereby enabling the four-point load-bearing assembly to carry the workpiece and wait for subsequent operations such as the workpiece to be picked up.

[0011] Preferably, the two CCD camera devices are symmetrically arranged, the transfer device is arranged below the CCD camera device, the workpiece picking and placing device includes a frame, a manipulator and a mounting plate, the workbench is arranged on the inner side of the frame, the mounting plate is fixedly installed on the top of the manipulator, and the mounting plate is fixedly installed on the top of the frame.

[0012] Preferably, the transfer device includes a linear moving mechanism and a supporting mechanism, the supporting mechanism is fixedly installed on the top of the workbench, the linear moving mechanism is installed on the top of the workbench, the linear moving mechanism is arranged on the inner side of the supporting mechanism, and the linear moving mechanism is used to feed parts.

[0013] Preferably, the linear moving mechanism includes a linear module, a connecting assembly, a lifting support assembly and a limiting rail. The linear module is fixedly installed on the top of the workbench, one end of the connecting assembly is transmission-connected to the output end of the linear module, and the other end of the connecting assembly is connected to the lifting support assembly. The limiting rail is fixedly installed on the top of the workbench, and the bottom of the lifting support assembly is slidingly connected to the limiting rail.

[0014] Preferably, the connecting assembly includes a connecting frame, a fixed plate and a slider, one end of the connecting frame is transmission-connected to the output end of the linear module, the other end of the connecting frame is connected to the fixed plate, the slider is fixedly connected to the bottom end of the fixed plate, and the slider is slidably connected to the limiting track.

[0015] Preferably, the lifting support assembly includes a linear cylinder, a limit seat and a supporting block. The linear cylinder is fixedly installed on the top of the fixed plate. The limit seat is transmission-connected to the output end of the linear cylinder. A limit slot is provided on the top of the limit seat. Two moving blocks are slidingly connected inside the limit slot. The top of the moving block is fixedly connected to the supporting block. The supporting block is slidingly connected to the limit seat through the moving block. A limiting part is provided on the top of the supporting block, and the limiting part and the supporting block are integrated.

[0016] Preferably, the supporting mechanism includes a fixed frame, a jig, a supporting block, a sliding frame and a locking assembly, two of the fixed frames are fixedly installed on the top of the workbench, the two fixed frames are arranged in parallel, two of the jigs are fixedly installed on the top of the fixed frame, two groups of the four-point bearing assemblies are respectively arranged at both ends of the jig, each group of the four-point bearing assemblies consists of four supporting blocks, the supporting block is installed on the top of the jig, the sliding frame is connected to the end of the jig, the sliding frame is slidably connected to the top of the fixed frame, and the locking assembly is installed at the bottom of the sliding frame.

[0017] Preferably, the locking assembly includes a fixed seat, a friction member and a bolt rod, the fixed seat is fixedly installed on the bottom of the sliding frame, the top of the friction member is slidably inserted and connected with a guide pin, the guide pin is fixedly connected to the fixed seat, the bolt rod is threadedly inserted and connected to the fixed seat, and a handle is fixedly connected to the bolt rod, and the handle is used to tighten the friction member.

[0018] Preferably, the friction part includes a fixed part, a connecting part and a friction extrusion part, the top of the fixed part is slidably and interlacedly connected with the guide pin, one end of the connecting part is connected to the fixed part, and the other end of the connecting part is connected to the friction extrusion part, the fixed part, the connecting part and the friction extrusion part are integrated, and the friction extrusion part and the fixing frame are in contact with each other.

[0019] The technical effects and advantages of the present invention are as follows:

[0020] (1) The present invention utilizes a setting mode in which a CCD photographing device and a transfer device are matched. The linear module facilitates the adjustment of the horizontal position of the part, and the lifting support assembly facilitates the lifting of the part so that the part can move linearly after it is no longer in contact with the support mechanism. The lifting support assembly also facilitates the lowering of the part and places it on the four-point bearing assembly. The four-point bearing assembly supports the part so that the part can wait for the operation of the next workstation under the support of the four-point bearing assembly. During this period, the linear moving mechanism can return to its original position and support the next workpiece to be inspected, so that the waiting of the part on the support mechanism does not affect the normal operation of the linear moving mechanism, saving time and being more practical.

[0021] (2) The present invention utilizes a configuration in which a manipulator and a mounting plate are matched, and an alignment camera is provided on the carrying platform, thereby facilitating alignment of the parts carried on the carrying platform. The photographed photos are then transmitted to the manipulator so that the manipulator can grasp the parts at a fixed point based on the photo information and place them on the four-point carrying assembly.

[0022] (3) The present invention utilizes a setting method in which the fixed part and the friction extrusion part are matched with each other, and the sliding interlacing between the guide pin and the top of the fixed part facilitates limiting the movement of the fixed part, making the movement of the fixed part more stable. The fixed part, the connecting part and the friction extrusion part form a Z-shaped structure, so that after the friction extrusion part is squeezed and fitted with the fixed frame, the position of the sliding frame can be limited, making the position of the adjusted frame more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the overall structural diagrams of the present invention.

[0024] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0025] Figure 3 This is a schematic structural diagram of the workpiece picking and placing device of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the transfer device of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the linear motion mechanism of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the connection component of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the lifting support assembly of the present invention.

[0030] Figure 8 For the present invention Figure 4Enlarged structural diagram at point A in the middle.

[0031] Figure 9 For the present invention Figure 4 Enlarged structural diagram at point B in the middle.

[0032] Figure 10 It is a structural schematic diagram of the locking assembly of the present invention.

[0033] Figure 11 It is a structural schematic diagram of the friction part of the present invention.

[0034] Figure: 1. Workbench; 2. Carrying platform; 3. Workpiece pick-up and placement device; 31. Frame; 32. Manipulator; 33. Mounting plate; 4. CCD camera; 5. Transfer device; 51. Linear motion mechanism; 511. Linear module; 512. Connecting assembly; 5121. Connecting frame; 5122. Fixing plate; 5123. Slider; 513. Lifting support assembly; 5131. Linear cylinder; 5132. Limit seat ;51321, limiting groove; 5133, bearing block; 51331, limiting part; 514, limiting rail; 52, supporting mechanism; 521, fixing frame; 522, forming frame; 523, supporting block; 524, sliding frame; 525, locking assembly; 5251, fixing seat; 5252, friction member; 52521, fixing part; 52522, connecting part; 52523, friction extrusion part; 5253, bolt rod. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The present invention provides Figure 1-11 The device for detecting the shape of an annular part and its use method shown in the figure include a workbench 1, a carrier 2, a workpiece pick-up and placement device 3, a CCD camera 4 and a transfer device 5. The carrier 2 is arranged on one side of the workbench 1, the workpiece pick-up and placement device 3 is arranged above the workbench 1, and multiple CCD cameras 4 are installed on the top of the workbench 1. The CCD camera 4 is used to take photos and compare the parts. The transfer device 5 is installed on the top of the workbench 1. The transfer device 5 is used to feed the parts. The CCD camera 4 includes a CCD camera and a bracket. The parts can be photographed and inspected by the CCD camera. The image of the part is taken by the CCD camera, and then processed by a computer algorithm and compared with the appearance of the stored qualified workpiece photos to automatically identify qualified products and unqualified products.

[0037] Two CCD camera devices 4 are symmetrically arranged, and the transfer device 5 is arranged below the CCD camera device 4. The workpiece picking and placing device 3 includes a frame 31, a manipulator 32 and a mounting plate 33. The workbench 1 is arranged on the inner side of the frame 31, and the mounting plate 33 is fixedly mounted on the top of the manipulator 32. The mounting plate 33 is fixedly mounted on the top of the frame 31. A positioning camera is set on the carrier platform 2 to facilitate the alignment of the parts carried on the carrier platform 2. The photographs taken are then transmitted to the manipulator 32 so that the manipulator 32 can grab the parts at a fixed point according to the photo information and place them on the four-point load-bearing assembly.

[0038] The transfer device 5 includes a linear motion mechanism 51 and a support mechanism 52. The support mechanism 52 is fixedly mounted on the top of the workbench 1. The linear motion mechanism 51 is mounted on the top of the workbench 1 and is arranged inside the support mechanism 52. The linear motion mechanism 51 is used to feed the parts.

[0039] The linear moving mechanism 51 includes a linear module 511, a connecting component 512, a lifting support component 513 and a limiting rail 514. The linear module 511 is fixedly installed on the top of the workbench 1. One end of the connecting component 512 is transmission-connected to the output end of the linear module 511, and the other end of the connecting component 512 is connected to the lifting support component 513. The limiting rail 514 is fixedly installed on the top of the workbench 1. The bottom of the lifting support component 513 is slidably connected to the limiting rail 514. The horizontal position of the part is easily driven and adjusted through the linear module 511. The lifting support assembly 513 facilitates the lifting of the part so that the part can move linearly after it is no longer in contact with the support mechanism 52. The lifting support assembly 513 also facilitates the lowering of the part and places it on the four-point bearing assembly. The four-point bearing assembly supports the part so that the part can wait for the operation of the next workstation under the support of the four-point bearing assembly. During this period, the linear motion mechanism 51 can return to its original position to support the next workpiece to be inspected, so that the waiting of the part on the support mechanism 52 does not affect the normal operation of the linear motion mechanism 51.

[0040] The connecting component 512 includes a connecting frame 5121, a fixed plate 5122 and a slider 5123. One end of the connecting frame 5121 is transmission-connected to the output end of the linear module 511, and the other end of the connecting frame 5121 is connected to the fixed plate 5122. The slider 5123 is fixedly connected to the bottom end of the fixed plate 5122. The slider 5123 is slidably connected to the limiting rail 514. The fixed plate 5122 is T-shaped, which is convenient for connecting the relative positions of the connecting frame 5121 and the slider 5123. The fixed plate 5122 facilitates the installation of the linear cylinder 5131. The lifting support component 513 includes a linear cylinder 5131, a limiting seat 5132 and a bearing block 5133. The linear cylinder 5131 is fixedly installed on the top of the fixed plate 5122. The limiting seat 5132 and the linear cylinder 5133 are connected. 1 is a transmission connection at the output end, a limiting groove 51321 is provided on the top of the limiting seat 5132, and two moving blocks are slidably connected inside the limiting groove 51321, and the top of the moving block is fixedly connected to the bearing block 5133, and the bearing block 5133 is slidably connected to the limiting seat 5132 through the moving block, and a limiting portion 51331 is provided on the top of the bearing block 5133, and the limiting portion 51331 and the bearing block 5133 are integrated. The relative arrangement of the limiting portion 51331 facilitates the limiting of the parts carried on the bearing block 5133 to prevent the parts from being positionally offset under the bearing of the bearing block 5133, and the sliding of the moving block in the limiting groove 51321 facilitates the adjustment of the position of the bearing block 5133, thereby facilitating the carrying of parts of various diameters;

[0041] The support mechanism 52 includes a fixed frame 521, a molding frame 522, a four-point bearing assembly, a sliding frame 524 and a locking assembly 525. The two fixed frames 521 are fixedly installed on the top of the workbench 1, and the two fixed frames 521 are arranged in parallel. The two molding frames 522 are fixedly installed on the top of the fixed frame 521. Two groups of four-point bearing assemblies are respectively arranged at both ends of the molding frame 522. Each group of four-point bearing assemblies consists of four supporting blocks 523. The supporting blocks 523 are installed on the top of the molding frame 522, and the sliding frame 524 is connected to the end of the molding frame 522. The sliding frame 524 is slidably connected to the top of the fixed frame 521, and the locking assembly 525 is installed at the bottom of the sliding frame 524. The fixed frame 521 is convenient for carrying the molding frame 522, and the molding frame 522 is convenient for installing and carrying the four-point bearing assembly. The sliding frame 524 slides under the limit of the fixed frame 521, so that the position adjustment of the molding frame 522 is more stable.

[0042] The locking assembly 525 includes a fixing seat 5251, a friction member 5252 and a bolt rod 5253. The fixing seat 5251 is fixedly installed at the bottom of the sliding frame 524. A guide pin is slidably inserted and connected to the top of the friction member 5252. The guide pin is fixedly connected to the fixing seat 5251. The bolt rod 5253 is threadedly inserted and connected to the fixing seat 5251. A handle is fixedly connected to the bolt rod 5253. The handle is used to press the friction member 5252. The friction member 5252 is made of elastic material. When the handle squeezes and deforms the friction member 5252, the friction member 5252 can be elastically squeezed against the fixing frame 521, thereby increasing the friction force between the friction member 5252 and the fixing frame 521, thereby achieving the position positioning of the sliding frame 524.

[0043] The friction member 5252 includes a fixed portion 52521, a connecting portion 52522 and a friction extrusion portion 52523. The top of the fixed portion 52521 is slidably inserted and connected with the guide pin. One end of the connecting portion 52522 is connected to the fixed portion 52521, and the other end of the connecting portion 52522 is connected to the friction extrusion portion 52523. The fixed portion 52521, the connecting portion 52522 and the friction extrusion portion 52523 are integrated. The friction extrusion portion 52523 and the fixing frame 521 are attached to each other. The guide pin and the top of the fixed part 52521 slide and intersperse, thereby facilitating the limitation of the movement of the fixed part 52521, making the movement of the fixed part 52521 more stable. The fixed part 52521, the connecting part 52522 and the friction and extrusion part 52523 form a Z-shaped structure, so that after the friction and extrusion part 52523 and the fixed frame 521 are squeezed and fitted, the position of the sliding frame 524 can be limited, making the position of the adjusted frame 522 more stable.

[0044] Method of use of the present invention:

[0045] According to the diameter of the workpiece, the relative position between the two jigs 522 is adaptively adjusted, so that the sliding frame 524 moves linearly under the limit of the fixed frame 521. After the position of the support block 523 is moved, the bolt rod 5253 is threadedly rotated, so that the handle presses the friction member 5252, so that the friction member 5252 can fit the surface of the fixed frame 521, and the position of the adjusted jig 522 is fixed, so that the four-point load-bearing assembly can bear parts of different specifications.

[0046] The part is placed on a set of four-point bearing components, and then the part is grabbed and placed on the transfer device 5 by the operation of the manipulator 32. The part is carried by the linear moving mechanism 51 and the supporting mechanism 52. Then, the linear cylinder 5131 is operated to drive the limit seat 5132 to move upward, so that the limit seat 5132 drives the two bearing blocks 5133 to move upward synchronously, so that the two bearing blocks 5133 move upward synchronously to lift the part to a certain height so that the part does not contact the supporting mechanism 52. Then, the linear module 511 is operated to drive the connecting component 512 to perform linear translation movement, so that the linear translation of the lifting support component 513 can be achieved until the part is moved to the bottom of the CCD camera 4. The workpiece supported on the linear moving mechanism 51 can be photographed and compared by the CCD camera 4 to achieve the appearance inspection of the workpiece.

[0047] Then, the linear module 511 continues to operate to drive the linear motion of the workpiece until the workpiece is delivered to the four-point load-bearing assembly. Then, the linear cylinder 5131 continues to drive the downward movement of the load-bearing block 5133, so that the four-point load-bearing assembly can support the workpiece and wait for subsequent operations such as the workpiece to be picked up.

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for using an annular part shape detection device, the device comprising a workbench (1), a carrier (2), a workpiece pick-up and placement device (3), a CCD camera (4) and a transfer device (5), wherein the carrier (2) is arranged on one side of the workbench (1), the workpiece pick-up and placement device (3) is arranged above the workbench (1), a plurality of CCD camera devices (4) are installed on the top of the workbench (1), the CCD camera devices (4) are used for taking photos and comparing parts, the transfer device (5) is installed on the top of the workbench (1), and the transfer device (5) is used for feeding parts; It is characterized by: The specific steps are as follows: Step 1: First, according to the diameter of the workpiece, the relative position between the two jigs (522) is adaptively adjusted so that the sliding frame (524) moves linearly under the limit of the fixed frame (521). After the position of the supporting block (523) is moved, the bolt rod (5253) is threadedly rotated so that the handle presses the friction member (5252) so that the friction member (5252) can fit the surface of the fixed frame (521), thereby fixing the position of the adjusted jig (522) and enabling the four-point bearing assembly to carry parts of different specifications. Step 2: Secondly, the part is placed on a set of four-point bearing components, and then the part is grabbed onto the transfer device (5) by the operation of the manipulator (32), and the part is carried by the linear moving mechanism (51) and the supporting mechanism (52), and then the linear cylinder (5131) is operated to drive the limit seat (5132) to move upward, so that the limit seat (5132) drives the two bearing blocks (5133) to move upward synchronously, so that the two bearing blocks (5133) move upward synchronously to lift the part to a certain height so that the part does not contact the supporting mechanism (52), and then the linear module (511) is operated to drive the connecting component (512) to perform linear translation movement, thereby realizing the linear translation drive of the lifting support component (513) until the part is moved to the bottom of the CCD camera (4), and the workpiece supported on the linear moving mechanism (51) can be photographed and compared by the CCD camera (4) to realize the inspection of the appearance of the workpiece; Step 3: Then, the linear module (511) continues to operate to drive the workpiece to move linearly until the workpiece is delivered to the four-point bearing assembly. Then, the linear cylinder (5131) continues to drive the bearing block (5133) to move downward, thereby enabling the four-point bearing assembly to carry the workpiece and wait for the workpiece to be picked up for subsequent operations.

2. The method for using the annular part shape detection device according to claim 1, characterized in that: The two CCD camera devices (4) are symmetrically arranged, the transfer device (5) is arranged below the CCD camera device (4), the workpiece picking and placing device (3) includes a frame (31), a manipulator (32) and a mounting plate (33), the workbench (1) is arranged on the inner side of the frame (31), the mounting plate (33) is fixedly installed on the top of the manipulator (32), and the mounting plate (33) is fixedly installed on the top of the frame (31).

3. The method for using the device for detecting the shape of an annular part according to claim 1, wherein: The linear motion mechanism (51) comprises a linear module (511), a connecting assembly (512), a lifting support assembly (513) and a limiting rail (514); the linear module (511) is fixedly mounted on the top of the workbench (1); one end of the connecting assembly (512) is transmission-connected to the output end of the linear module (511); the other end of the connecting assembly (512) is connected to the lifting support assembly (513); the limiting rail (514) is fixedly mounted on the top of the workbench (1); and the bottom of the lifting support assembly (513) is slidably connected to the limiting rail (514).

4. The method for using the device for detecting the shape of an annular part according to claim 3, characterized in that: The connecting assembly (512) comprises a connecting frame (5121), a fixed plate (5122) and a slider (5123); one end of the connecting frame (5121) is transmission-connected to the output end of the linear module (511); the other end of the connecting frame (5121) is connected to the fixed plate (5122); the slider (5123) is fixedly connected to the bottom end of the fixed plate (5122); and the slider (5123) is slidably connected to the limiting track (514).

5. The method for using the device for detecting the shape of an annular part according to claim 3, characterized in that: The lifting support assembly (513) comprises a linear cylinder (5131), a limiting seat (5132) and a bearing block (5133); the linear cylinder (5131) is fixedly mounted on the top of the fixed plate (5122); the limiting seat (5132) is transmission-connected to the output end of the linear cylinder (5131); a limiting slot (51321) is provided on the top of the limiting seat (5132); two moving blocks are slidingly connected inside the limiting slot (51321); the top of the moving block is fixedly connected to the bearing block (5133); the bearing block (5133) is slidingly connected to the limiting seat (5132) via the moving block; a limiting portion (51331) is provided on the top of the bearing block (5133); the limiting portion (51331) and the bearing block (5133) are integrated.

6. The method for using the annular part shape detection device according to claim 1, characterized in that: The support mechanism (52) comprises a fixed frame (521), a press frame (522), a four-point bearing assembly, a sliding frame (524) and a locking assembly (525), wherein the two fixed frames (521) are fixedly mounted on the top of the workbench (1), the two fixed frames (521) are arranged in parallel, the two press frames (522) are fixedly mounted on the top of the fixed frame (521), two groups of the four-point bearing assemblies are respectively arranged at the two ends of the press frame (522), each group of the four-point bearing assemblies consists of four supporting blocks (523), the supporting blocks (523) are mounted on the top of the press frame (522), the sliding frame (524) is connected to the end of the press frame (522), the sliding frame (524) is slidably connected to the top of the fixed frame (521), and the locking assembly (525) is mounted on the bottom of the sliding frame (524).

7. The method for using the device for detecting the shape of an annular part according to claim 6, characterized in that: The locking assembly (525) includes a fixed seat (5251), a friction member (5252) and a bolt rod (5253), wherein the fixed seat (5251) is fixedly mounted on the bottom of the sliding frame (524), the top of the friction member (5252) is slidably connected with a guide pin, the guide pin is fixedly connected to the fixed seat (5251), the bolt rod (5253) is threadedly connected to the fixed seat (5251), and a handle is fixedly connected to the bolt rod (5253), and the handle is used to press the friction member (5252).

8. The method for using the device for detecting the shape of an annular part according to claim 7, characterized in that: The friction part (5252) includes a fixed part (52521), a connecting part (52522) and a friction extrusion part (52523), the top of the fixed part (52521) is slidably and interlacedly connected with the guide pin, one end of the connecting part (52522) is connected to the fixed part (52521), and the other end of the connecting part (52522) is connected to the friction extrusion part (52523), the fixed part (52521), the connecting part (52522) and the friction extrusion part (52523) are integrated, and the friction extrusion part (52523) and the fixing frame (521) are in contact with each other.

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