CN220207456U

CN220207456U - External surface image acquisition device of small-sized workpiece

Info

Publication number: CN220207456U
Application number: CN202222231115.4U
Authority: CN
Inventors: 周晓东
Original assignee: Changchun University of Technology
Current assignee: Changchun University of Technology
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-12-19
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses an external surface image acquisition device of a small-sized workpiece, which comprises an image acquisition mechanism, a rotary clamping mechanism, a sliding carrying mechanism and a vertical displacement mechanism, wherein the rotary clamping mechanism realizes the clamping of various small-sized workpieces through the mutual combination of a plug-in type clamp; the sliding carrying mechanism drives the screw rod through a motor to clamp and loosen the workpiece; the rotary clamping mechanism drives the turntable to rotate through a motor, and adjusts a first shooting angle of the workpiece; the vertical displacement mechanism drives the first screw nut and the second screw nut to reversely move through the first vertical screw motor and the second vertical screw motor respectively, and pulls out or withdraws a sliding rod at the free end in the sliding carrying mechanism, so that the sliding carrying mechanism deflects at a small angle, and the second shooting angle of the workpiece is adjusted. According to the utility model, the external surface images of the special postures of the small-sized workpiece are acquired by adjusting the two shooting angles of the workpiece, so that the problem that part of small-sized workpiece has shooting dead angles in the plane detection of a fixed view field is solved.

Description

External surface image acquisition device of small-sized workpiece

Technical Field

The utility model belongs to the field of image acquisition devices for detecting workpieces by adopting a machine vision technology, and particularly relates to an outer surface image acquisition device for a small workpiece.

Background

The small-sized workpiece is a workpiece which can be carried, disassembled and detected by a single person, has smaller size and lighter weight, is a basic component part of a machine product, and widely appears in various mechanical products, and can have quality problems such as sand holes, cracks, burrs, dimensional errors and the like in the production and processing process.

The small-sized workpiece has various types and various shapes, often has a plurality of detection indexes, and needs to detect a plurality of angles, such as whether the outer cylindrical surface of the shaft part needs to be scratched or not and whether the end surface of the shaft part is flat or not; if the box parts have multi-position and multi-angle detection surfaces distributed circumferentially, most of the existing small-sized workpieces still need manual detection, for the small-sized parts needing the detection of multiple surfaces, a single-person single-sided detection scheme with multiple groups is generally adopted, the scheme is low in efficiency, and the long-time workers detect the small-sized parts with large damage to eyes, visual fatigue is easy to generate, false detection is caused, and the detection quality of the small-sized workpieces cannot be well controlled; moreover, when a large number of products are faced, the manual detection is performed one by one, the time and the labor are consumed, the detection efficiency is very low, along with the development of industrial intellectualization in China, an automatic detection method based on a machine vision technology is widely applied, an image to be detected on the outer surface of a workpiece is acquired through the machine vision technology, then the automatic detection is realized through an image processing technology, and an automatic image acquisition device is needed by using the detection method.

The existing image acquisition device generally comprises a shooting device and a clamping device, in order to ensure the stability (the burnt can be caused by frequent movement of a camera) and the integrity of the outer surface detection of a small workpiece (for example, the complete detection of the outer surface of a shaft part needs to be ensured), the shooting device is generally fixed, the workpiece to be detected is clamped on a clamp capable of rotating in a plane or moving in a straight line, the position of the workpiece is adjusted through rotation or straight line movement in a single direction, for example, in the machine vision detection device applicable to an automobile engine disclosed in China patent with the publication number CN 218098928U, the two rotation actions of the clamping rotation device and the detection platform are mutually independent and are only limited to rotation of a single plane, and shooting dead angles exist for adjusting the position in the single direction, so that a plurality of to-be-detected surfaces with special angle requirements can not be accurately acquired due to shadow shielding among structures, and the clamping scheme needs to be manually replaced and the installation is time-consuming and labor-consuming.

On the other hand, most of the existing small-sized workpiece clamping devices are specially customized, universality is not achieved, clamping modes and shooting angles required by different types of small-sized workpieces are different, and the matched adjustable angle clamping devices are respectively designed for the different types of small-sized workpieces, so that the cost is high, and resource waste is caused.

At present, an automatic image acquisition device which completely meets the requirements does not exist in the market, so that the design of the image acquisition device for the outer surface of the small-sized workpiece has important significance.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an external surface image acquisition device for a small workpiece, which can solve the problems of single angle adjustment and low manual detection efficiency of the conventional small workpiece image acquisition device.

In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme.

The image acquisition device for the outer surface of the small-sized workpiece comprises an image acquisition mechanism, a rotary clamping mechanism, a sliding carrying mechanism and a vertical displacement mechanism.

The image acquisition mechanism comprises an industrial camera, a camera seat, a clamping knob, a holding knob, a hanging rod and a hanging rod seat, wherein threaded holes are formed in two side surfaces of the camera seat and are matched with the clamping knob, the industrial camera is placed in the camera seat and clamped through the clamping knob, a through hole is formed in the upper end surface of the camera seat and is matched with the hanging rod, threaded holes are formed in the side surfaces of the through hole of the camera seat and are matched with the holding knob, external threads at the lower end of the hanging rod are in threaded connection with the upper holes of the hanging rod seat and are arranged on the hanging rod seat, and annular array threaded holes are formed in the lower portion of the hanging rod seat and are arranged on the platform base through bolt connection.

The rotary clamping mechanism comprises a first rotary clamping mechanism and a second rotary clamping mechanism which are symmetrically placed and have the same structure; the first rotary clamping mechanism comprises a motor mounting screw, a turntable motor, a first clamping main body, a turntable and a plug-in type clamp; the left side of the first clamping main body is provided with a motor groove, and the turntable motor is connected and installed in the motor groove of the first clamping main body through a motor installation screw; a bearing is arranged in a round hole on the upper right side of the first clamping main body, an inner ring of the bearing is matched with the outer surface of the shaft end of the turntable, a hole in the shaft end of the turntable is connected with a motor shaft of the turntable motor, and array holes distributed in a snowflake shape are formed in the end face of the turntable; the plug-in type clamp is of various types and can be mutually combined for use according to the clamping scheme of the workpiece, one end of the plug-in type clamp is matched with an array hole on a rotary table of the rotary clamping mechanism, and the other end of the plug-in type clamp is matched with the clamped small-sized workpiece; the screw rod on the slip carrying mechanism is allowed to pass through the through hole below the first clamping main body, a flange screw nut mounting hole is formed below the left end face of the first clamping main body and used for mounting a first flange screw nut on the slip carrying mechanism, and a group of symmetrical rectangular sliding grooves are formed below the first clamping main body and used for being matched with the strip-shaped sliding rail on the slip carrying mechanism.

The sliding carrying mechanism comprises a carrying platform, a first horizontal screw rod seat, a first flange screw nut, a strip-shaped sliding rail, a screw rod, a second flange screw nut, a second horizontal screw rod seat, a coupler, a screw motor, a first hinge shaft, a first sliding rod seat, a second sliding rod and a second hinge shaft; the first horizontal screw seat and the second horizontal screw seat are connected and installed on the carrying platform through hexagon bolts, the screw rod is installed between the first screw seat and the second screw seat, a bearing is arranged in a bearing hole of the first horizontal screw seat and is matched with a polished rod at the left end of the screw rod, a bearing is arranged in a bearing hole at the left end of the second horizontal screw seat and is matched with a polished rod at the right end of the screw rod, the polished rod at the right end of the screw rod is longer than the axial dimension of the bearing in the second horizontal screw seat and extends out partially, the extending part of the polished rod at the right end of the screw rod is connected with the shaft end of a screw rod motor through a coupling, the screw rod motor is installed on the right end face of the second horizontal screw seat through a bolt connection, the first flange nut and the second flange nut are installed on the screw rod through threads and are symmetrically placed, and the first flange nut and the second flange nut are installed in round holes below the first clamping body and the second clamping body in the rotary clamping mechanism through the bolt connection respectively; the strip-shaped sliding rail is connected with two sides of a screw rod of the screw rod on the carrying platform through countersunk screws; the first slide bar seat and the second slide bar seat are connected and installed below the carrying platform through two groups of countersunk head screws, an interval is reserved between the first slide bar seat and the second slide bar seat, a square through hole of the first slide bar seat is matched with the right end of the first slide bar seat, the first slide bar can slide relative to the first slide bar seat, a hole in the left end of the first slide bar is matched with a first hinge shaft, a square hole in the second slide bar seat is connected with the left end of the second slide bar through countersunk head screws, the second slide bar is fixed with the second slide bar seat, and a hole in the right end of the second slide bar is matched with the second hinge shaft.

The vertical displacement mechanism comprises a first vertical displacement mechanism, a second vertical displacement mechanism and a platform base, wherein the first vertical displacement mechanism and the second vertical displacement mechanism are symmetrically arranged and the parts are identical in structure; the first vertical displacement mechanism comprises a first vertical screw motor, a screw upper end seat, a first vertical screw nut, a vertical screw rod and a first screw seat; the first vertical screw motor is arranged on the screw upper end seat through bolt connection, the screw upper end seat is arranged on the first screw seat through bolt connection, the first screw seat is arranged on the platform base through bolt connection, the vertical screw rod is arranged between the screw upper end seat and the first screw seat, a coupler is arranged in the vertical screw upper end seat, so that a polished rod at the upper end of the vertical screw rod is connected with the first vertical screw motor through the coupler, a bearing is arranged in a bearing hole of the vertical first screw seat and is matched with a polished rod at the lower end of the screw rod, a first vertical screw is arranged on the vertical screw rod through threaded connection, and the first vertical screw and the first sliding rod are connected through a first hinge shaft; the second vertical screw nut is connected with the second sliding rod through a second hinge shaft.

Further, threaded holes are formed in the left side and the right side of the camera seat and are used for installing a clamping knob; the camera seat is provided with a cylindrical through hole matched with the hanging rod, and a threaded hole is arranged on the side surface of the through hole to be matched with the holding knob.

Further, the inner ring of the circular hole bearing above the right end surface of the first clamping main body is consistent with the shaft end of the turntable in size, and the inner ring and the turntable are matched with each other; the left end face of the first clamping main body is provided with a flange nut mounting hole matched with a first flange nut; the first clamping main body is provided with a through hole, and the size of the through hole is slightly larger than the outer diameter size of the screw rod.

Further, two flange nuts on the sliding carrying mechanism are installed on the screw rod in a mirror image mode, and when the screw rod motor drives the screw rod to rotate, the two flange nuts simultaneously move inwards or outwards.

Further, the size of the left end hole of the first sliding rod is consistent with that of the right end hole of the first vertical screw nut, and the left end hole and the right end hole are connected through a first hinge shaft; the size of the hole at the right end of the second sliding rod is consistent with that of the hole at the left end of the second vertical screw nut, and the hole are connected through a second hinge shaft; the first slide bar and the first slide bar seat can slide relatively, and the second slide bar is fixedly connected with the second slide bar seat.

Furthermore, the rotary clamping mechanism can realize first shooting angle adjustment of the workpiece, the sliding carrying mechanism and the vertical displacement mechanism are matched to realize second shooting angle adjustment of the workpiece, the two angle adjustment methods are mutually independent, and the outer surface image shooting of the complex angle of the workpiece can be realized through combined use.

The utility model has the beneficial effects that:

the two turntables of the rotary clamping mechanism are provided with a plurality of groups of array holes distributed in a snowflake shape, and different plug-in type clamps can be selected to clamp different types of small workpieces; controlling a screw motor on the sliding carrying mechanism to drive the rotary clamping mechanism to clamp the workpiece; the two turntable motors in the rotary clamping mechanism are controlled to realize first shooting angle adjustment of the workpiece, the first vertical screw motor and the second vertical screw motor in the vertical displacement mechanism are respectively controlled to enable the two vertical screws to reversely move, the first sliding rod is pulled out, the sliding carrying mechanism is subjected to angle deflection, so that second shooting angle adjustment of the workpiece is realized, the two angle adjustments are mutually independent, adjustment of complex postures of the workpiece can be realized in a combined mode, frequent disassembly is not needed, the acquisition of outer surface images required by small-sized workpiece detection is facilitated, and good preparation is provided for subsequent image processing and quality detection work.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the image acquisition mechanism of the present utility model.

Fig. 3 is a schematic structural view of the upper rotary clamping mechanism of the present utility model.

Fig. 4 is a schematic plan view of the slide mounting mechanism according to the present utility model.

Fig. 5 is a schematic bottom view of the slide mounting mechanism of the present utility model.

Fig. 6 is a schematic structural view of the vertical displacement mechanism of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, 2, 3, 4, 5 and 6, the image acquisition mechanism for the outer surface of the small-sized workpiece in the embodiment comprises an image acquisition mechanism 1, a rotary clamping mechanism 2, a sliding carrying mechanism 3 and a vertical displacement mechanism 4; the rotary clamping mechanism 2 comprises a first rotary clamping mechanism 21 and a second rotary clamping mechanism 22; the vertical displacement mechanism 4 includes a first vertical displacement mechanism 41, a second vertical displacement mechanism 42, and a platform base 43; the vertical rod seat 106 in the image acquisition mechanism 1 is connected on the platform base 43 through bolts; the first clamping body 213 and the second clamping body 223 in the rotary clamping mechanism 2 are positioned on the strip-shaped sliding rail on the sliding carrying mechanism 3 and are respectively connected with the first flange nut 303 and the second flange nut 306 through bolts; the first slide bar 311 and the second slide bar 314 in the slide mounting mechanism 3 are respectively connected with the first screw nut 413 and the second screw nut 423 of the vertical displacement mechanism 4 through the first hinge shaft 310 and the second hinge shaft 315; the first screw mount 415 and the second screw mount 425 of the vertical displacement mechanism 4 are mounted on the platform base 43 by bolting.

Referring to fig. 2, the image capturing mechanism 1 includes an industrial camera 101, a camera seat 102, a clamping knob 103, a holding knob 104, a hanging rod 105 and a hanging rod seat 106, wherein the industrial camera 101 is placed in the camera seat 102 and clamped by the clamping knob 103, a through hole is formed in the upper end surface of the camera seat 102 and matched with the hanging rod 105, a threaded hole is formed in the side surface of the through hole of the camera seat 102 and matched with the holding knob 104, the position of the camera seat 102 is adjusted and held by the holding knob 104, an external thread at the lower end of the hanging rod 105 is connected with a threaded hole on the hanging rod seat 106, the hanging rod seat 106 is provided with a circular array of threaded holes below, and the hanging rod seat 106 is mounted on the platform base 43 through a bolt connection.

Referring to fig. 3 and 6, the rotary clamping mechanism 2 includes a first rotary clamping mechanism 21 and a second rotary clamping mechanism 22, and the first rotary clamping mechanism 21 and the second rotary clamping mechanism 22 are symmetrically disposed and have the same construction; the first rotary clamping mechanism 21 comprises a motor mounting screw 211, a turntable motor 212, a first clamping body 213, a turntable 214 and a plug-in clamp 215; the left side of the first clamping main body 21 is provided with a motor groove, and the turntable motor 212 is connected through a motor mounting screw 211 and is arranged in the motor groove of the first clamping main body 213; a bearing is arranged in a round hole at the upper right side of the first clamping main body 213 and is matched with the outer surface of the shaft end of the turntable 214, a hole is arranged in the shaft end of the turntable 214 and is matched with the motor shaft of the turntable motor 212, and array holes distributed in a snowflake shape are arranged on the end surface of the turntable 214; the plug-in type clamps 215 can be mutually combined according to the clamping scheme of the workpiece, one end of each plug-in type clamp 215 is matched with an array hole on a rotary table of the rotary clamping mechanism, and the other end of each plug-in type clamp is matched with the clamped small workpiece; the lower part of the first clamping main body 213 is provided with a through hole for allowing a screw rod 305 on the sliding carrying mechanism 3 to pass through, the lower part of the left end surface of the first clamping main body 213 is provided with a mounting hole for mounting a first flange nut 303 on the sliding carrying mechanism 3, the lower part of the first clamping main body 213 is provided with a group of symmetrical rectangular sliding grooves for being matched with a strip-shaped sliding rail 304 on the sliding carrying mechanism 3, and the rotary clamping mechanism 2 synchronously drives two turntables 214 and 224 to rotate by two turnplate motors 212 and 222 to realize the first shooting angle adjustment of a tested workpiece.

Referring to fig. 4 and 5, the sliding mounting mechanism 3 includes a mounting platform 301, a first horizontal screw base 302, a first flange screw 303, a bar-shaped sliding rail 304, a screw 305, a second flange screw 306, a second horizontal screw base 307, a coupling 308, a screw motor 309, a first hinge shaft 310, a first sliding bar 311, a first sliding bar base 312, a second sliding bar base 313, a second sliding bar 314, and a second hinge shaft 315; the first horizontal screw rod seat 302 and the second horizontal screw rod seat 307 are installed on the carrying platform 301 through hexagonal bolt connection, the screw rod 305 is installed between the first screw rod seat 302 and the second screw rod seat 307, a bearing is arranged in a bearing hole of the first horizontal screw rod seat 302 and is matched with a polished rod at the left end of the screw rod 305, a bearing is arranged in a left bearing hole of the second horizontal screw rod seat 307 and is matched with a polished rod at the right end of the screw rod 305, the polished rod at the right end of the screw rod 305 is longer than the axial dimension of the bearing in the second horizontal screw rod seat 307, a part of the polished rod at the right end of the screw rod 305 extends out, a polished rod extending part at the shaft end of the screw rod motor 309 is connected with the shaft end of the screw rod motor 309 through a shaft coupling, the screw motor 309 is mounted on the right end surface of the second horizontal screw seat 307 through a bolt connection, the first flange screw 303 and the second flange screw 306 are mounted on the screw 305 through a threaded connection and are symmetrically placed, the first flange screw 303 and the second flange screw 306 are respectively mounted in round holes below the first clamping body 213 and the second clamping body 223 in the rotary clamping mechanism 2 through a bolt connection, the screw motor 309 drives the screw 305 to rotate through a coupler 308, so that the two flange screws 303 and 306 on the screw motor simultaneously move inwards or outwards, and the rotary clamping mechanism 2 realizes automatic clamping and loosening; the strip-shaped sliding rails 304 are connected through countersunk screws and are arranged on two sides of a lead screw rod 305 on the carrying platform 301; the first slide bar seat 312 and the second slide bar seat 313 are connected and installed below the carrying platform 301 through two groups of countersunk head screws, a space is reserved between the first slide bar seat 312 and the second slide bar seat 313, the first slide bar seat 312 is provided with a square through hole to be matched with the right end of the first slide bar 311, the first slide bar 311 can slide relatively with the first slide bar seat 312, the left end of the first slide bar 311 is provided with a hole to be matched with the first hinge shaft 310, the second slide bar seat 313 is provided with a square hole to be connected with the left end of the second slide bar 314 through countersunk head screws, the second slide bar 314 is fixed with the second slide bar seat 313, and the right end of the second slide bar 314 is provided with a hole to be matched with the second hinge shaft 315.

Referring to fig. 6, the vertical displacement mechanism 4 includes a first vertical displacement mechanism 41, a second vertical displacement mechanism 42 and a platform base 43, where the first vertical displacement mechanism 41 and the second vertical displacement mechanism 42 are symmetrically disposed and the components are identical; the first vertical displacement mechanism 41 comprises a first vertical screw motor 411, a screw upper end seat 412, a first vertical screw 413, a vertical screw 414 and a first screw seat 415; the first vertical screw motor 411 is mounted on the screw upper end seat 412 through a bolt connection, the screw upper end seat 412 is mounted on the first screw seat 415 through a bolt connection, the first screw seat 415 is mounted on the platform base 43 through a bolt connection, the vertical screw 414 is arranged between the screw upper end seat 412 and the first screw seat 415, a coupler is arranged in the vertical screw upper end seat 412, so that the upper end polish rod of the vertical screw 414 is connected with the first vertical screw motor 411 through the coupler, a bearing is arranged in a bearing hole of the vertical first screw seat 415 and is matched with the lower end polish rod of the vertical screw 414, the vertical screw 414 is provided with a first screw 413 through a threaded connection, and the first screw 413 and the first slide bar 311 are connected through the first hinge shaft 310; the second screw nut 423 and the second sliding rod 314 are connected through a second hinge shaft 315; the first vertical screw motor 411 and the second vertical screw motor 421 respectively drive the first screw 413 and the second screw 423 to reversely move, when a height difference is generated, the first screw 413 pulls the first slide bar 311, so that a clamping platform formed by the rotary clamping mechanism 2 and the sliding carrying mechanism 3 deflects at a small angle, and the second shooting angle adjustment of the workpiece to be tested is realized.

The working principle of the utility model is as follows:

during operation, according to the outline of a measured piece, a proper plug-in clamp 215 is selected, a workpiece clamping and fixing scheme is determined, plug-in clamps 215 and 225 mounted on two turntables 214 and 224 of a rotary clamping mechanism 2 are controlled, a screw motor 309 on a sliding carrying mechanism 3 is controlled to drive the rotary clamping mechanism 2 to clamp the workpiece, two turnplate motors 212 and 222 in the rotary clamping mechanism 2 are controlled to realize first shooting angle adjustment on the workpiece, a first vertical screw motor 411 and a second vertical screw motor 421 in a vertical displacement mechanism 4 are respectively controlled to enable two vertical nuts 413 and 423 to generate height differences, so that second shooting angle adjustment on the workpiece is realized, the two shooting angle adjustments are mutually independent, an external surface image of a small-sized workpiece with a complex angle can be obtained through mutual combination, and good preparation is provided for subsequent image processing and quality detection work.

While there has been shown and described what are at present considered to be fundamental principles, main features and advantages of the present utility model, it will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, but is described in the foregoing description merely illustrates the principles of the utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a small-size work piece surface image acquisition device which characterized in that: the device comprises an image acquisition mechanism (1), a rotary clamping mechanism (2), a sliding carrying mechanism (3) and a vertical displacement mechanism (4); the rotary clamping mechanism (2) comprises a first rotary clamping mechanism (21) and a second rotary clamping mechanism (22); the vertical displacement mechanism (4) comprises a first vertical displacement mechanism (41), a second vertical displacement mechanism (42) and a platform base (43); a vertical rod seat (106) in the image acquisition mechanism (1) is connected on a platform base (43) through bolts; a first clamping main body (213) and a second clamping main body (223) in the rotary clamping mechanism (2) are positioned on a strip-shaped sliding rail on the sliding carrying mechanism (3) and are respectively connected with a first flange nut (303) and a second flange nut (306) through bolts; the first sliding rod (311) and the second sliding rod (314) in the sliding carrying mechanism (3) are respectively connected with a first screw nut (413) and a second screw nut (423) of the vertical displacement mechanism (4) through a first hinge shaft (310) and a second hinge shaft (315); the first screw rod seat (415) and the second screw rod seat (425) of the vertical displacement mechanism (4) are connected and installed on the platform base (43) through bolts; the image acquisition mechanism (1) comprises an industrial camera (101), a camera seat (102), a clamping knob (103), a holding knob (104), a hanging rod (105) and a hanging rod seat (106), wherein the industrial camera (101) is placed in the camera seat (102) and clamped through the clamping knob (103), a through hole is formed in the upper end face of the camera seat (102) and matched with the hanging rod (105), a threaded hole is formed in the side face of the through hole of the camera seat (102) and matched with the holding knob (104), the position of the camera seat (102) is adjusted and held through the holding knob (104), external threads at the lower end of the hanging rod (105) are connected with the upper hole of the hanging rod seat (106) through threads, the hanging rod seat (106) is provided with a circular array threaded hole, and the hanging rod seat (106) is connected with the platform seat (43) through bolts; the rotary clamping mechanism (2) comprises a first rotary clamping mechanism (21) and a second rotary clamping mechanism (22), and the first rotary clamping mechanism (21) and the second rotary clamping mechanism (22) are symmetrically arranged and have the same structure; the first rotary clamping mechanism (21) comprises a motor mounting screw (211), a turntable motor (212), a first clamping body (213), a turntable (214) and a plug-in clamp (215); the left side of the first clamping main body (213) is provided with a motor groove, the turntable motor (212) is connected through a motor mounting screw (211) and is arranged in the motor groove of the first clamping main body (213); a round hole is formed in the upper right side of the first clamping main body (213) and matched with the outer surface of the shaft end of the rotary table (214), holes are formed in the shaft end of the rotary table (214) and connected with a motor shaft of the rotary table motor (212), and array holes distributed in a snowflake shape are formed in the end face of the rotary table (214); the plug-in type clamp (215) can be mutually combined according to the clamping scheme of the workpiece, one end of the plug-in type clamp (215) is matched with an array hole on a rotary table of the rotary clamping mechanism, and the other end of the plug-in type clamp is matched with the clamped small-sized workpiece; a through hole is formed below the first clamping main body (213) for allowing a screw rod (305) on the sliding carrying mechanism (3) to pass through, a mounting hole is formed below the left end face of the first clamping main body (213) for mounting a first flange screw (303) on the sliding carrying mechanism (3), a group of symmetrical rectangular sliding grooves are formed below the first clamping main body (213) and are used for being matched with a strip-shaped sliding rail (304) on the sliding carrying mechanism (3), and the rotary clamping mechanism (2) synchronously drives two turntables (214) and (224) to rotate by two turntable motors (212) and (222) to realize first angle adjustment of a tested workpiece; the sliding carrying mechanism (3) comprises a carrying platform (301), a first horizontal screw rod seat (302), a first flange screw nut (303), a strip-shaped sliding rail (304), a screw rod (305), a second flange screw nut (306), a second horizontal screw rod seat (307), a coupler (308), a screw rod motor (309), a first hinge shaft (310), a first sliding rod (311), a first sliding rod seat (312), a second sliding rod seat (313), a second sliding rod (314) and a second hinge shaft (315); the first horizontal screw rod seat (302) and the second horizontal screw rod seat (307) are connected and installed on the carrying platform (301) through hexagonal bolts, the screw rod screw (305) is installed between the first horizontal screw rod seat (302) and the second horizontal screw rod seat (307), a bearing is arranged in a bearing hole of the first horizontal screw rod seat (302) and is matched with a left end polished rod of the screw rod screw (305), a bearing is arranged in a left bearing hole of the second horizontal screw rod seat (307) and is matched with a right end polished rod of the screw rod screw (305), the right end polished rod of the screw rod screw (305) is longer than the axial dimension of a bearing in the second horizontal screw rod seat (307) and is partially extended, the right end polished rod extension part of the screw rod (305) is connected with the shaft end of the screw rod motor (309) through a coupling, the screw rod motor (309) is installed on the right end surface of the second horizontal screw rod seat (307) through a bolt connection, the first flange screw (303) and the second flange screw (306) are installed on the screw rod (305) through a threaded connection and are symmetrically placed, the first flange screw (303) and the second flange screw (306) are respectively installed in a first clamping main body (213) and a second clamping main body (223) below a rotary clamping mechanism (2) through a bolt connection, the screw rod motor (309) drives the screw rod (305) to rotate through a coupling (308), so that the two flange screws (303) on the screw rod motor, 306 Simultaneously moving inwards or outwards to enable the rotary clamping mechanism (2) to realize automatic clamping and loosening; the strip-shaped sliding rails (304) are connected through countersunk screws and are arranged on two sides of a lead screw rod (305) on the carrying platform (301); the first slide bar seat (312) and the second slide bar seat (313) are connected and installed below the carrying platform (301) through two groups of countersunk head screws, a space is reserved between the first slide bar seat (312) and the second slide bar seat (313), the first slide bar seat (312) is provided with a square through hole to be matched with the right end of the first slide bar (311), the first slide bar (311) can slide relatively with the first slide bar seat (312), the left end of the first slide bar (311) is provided with a hole to be matched with the first hinge shaft (310), the second slide bar seat (313) is provided with a square hole to be connected with the left end of the second slide bar (314) through countersunk head screws, the second slide bar (314) is fixed with the second slide bar seat (313), and the right end of the second slide bar (314) is provided with a hole to be matched with the second hinge shaft (315); the vertical displacement mechanism (4) comprises a first vertical displacement mechanism (41), a second vertical displacement mechanism (42) and a platform base (43), wherein the first vertical displacement mechanism (41) and the second vertical displacement mechanism (42) are symmetrically arranged and the parts are identical in structure; the first vertical displacement mechanism (41) comprises a first vertical screw motor (411), a screw upper end seat (412), a first screw nut (413), a vertical screw rod (414) and a first screw seat (415); the vertical screw motor (411) is installed on the screw upper end seat (412) through bolt connection, the screw upper end seat (412) is installed on the first screw seat (415) through bolt connection, the first screw seat (415) is installed on the platform base (43) through bolt connection, the vertical screw (414) is arranged between the screw upper end seat (412) and the first screw seat (415), a coupler is arranged in the screw upper end seat (412), so that an upper end polish rod of the vertical screw (414) is connected with the first vertical screw motor (411) through the coupler, a bearing is arranged in a bearing hole of the first screw seat (415) and is matched with a lower end polish rod of the vertical screw (414), a first screw nut (413) is installed on the vertical screw (414) through thread connection, and the first screw nut (413) and the first slide bar (311) are connected through a first hinge shaft (310); the second lead screw nut (423) is connected with the second sliding rod (314) through a second hinge shaft (315); the first vertical screw motor (411) and the second vertical screw motor (421) respectively drive the first screw nut (413) and the second screw nut (423) to reversely move, and when a height difference is generated, the first screw nut (413) pulls the first sliding rod (311) to enable the clamping platform formed by the rotary clamping mechanism (2) and the sliding carrying mechanism (3) to deflect at a small angle, so that the second shooting angle adjustment of the measured workpiece is realized.

2. The device for acquiring the image of the outer surface of the small-sized workpiece according to claim 1, wherein: screw holes are formed in the left side and the right side of the camera seat (102) and are used for installing a clamping knob (103); the camera seat (102) is provided with a cylindrical through hole matched with the hanging rod (105), and the side surface of the through hole is provided with a threaded hole matched with the holding knob (104).

3. The device for acquiring the image of the outer surface of the small-sized workpiece according to claim 1, wherein: the bearing inner ring of the round hole above the right end surface of the first clamping main body (213) is consistent with the shaft end of the turntable (214) in size, and the bearing inner ring and the turntable are matched with each other; a flange nut mounting hole is formed in the left end face of the first clamping main body (213) and is matched with a first flange nut (303); the first clamping body (213) is provided with a through hole, and the size of the through hole is slightly larger than the outer diameter size of the screw rod (305).

4. The device for acquiring the image of the outer surface of the small-sized workpiece according to claim 1, wherein: two flange nuts (303, 306) on the sliding carrying mechanism (3) are installed on the screw rod (305) in a mirror image mode, and when the screw rod (305) is driven by the screw rod motor (309) to rotate, the two flange nuts (303, 306) move inwards or outwards simultaneously.

5. The device for acquiring the image of the outer surface of the small-sized workpiece according to claim 1, wherein: the size of the left end hole of the first sliding rod (311) is consistent with that of the right end hole of the first lead screw nut (413), and the left end hole and the right end hole are connected through a first hinge shaft (310); the size of the hole at the right end of the second sliding rod (314) is consistent with that of the hole at the left end of the second lead screw nut (423), and the hole are connected through a second hinge shaft (315); the first sliding rod (311) and the first sliding rod seat (312) can slide relatively, and the second sliding rod (314) and the second sliding rod seat (313) are fixedly connected.

6. The device for acquiring the image of the outer surface of the small-sized workpiece according to claim 1, wherein: the rotary clamping mechanism (2) can realize first angle adjustment of a workpiece, the sliding carrying mechanism (3) and the vertical displacement mechanism (4) are matched to realize second angle adjustment, the two angle adjustment methods are mutually independent, and the outer surface image shooting of the complex angle of the workpiece can be realized through combined use.