CN211601876U

CN211601876U - Micro-aperture measuring device

Info

Publication number: CN211601876U
Application number: CN202020490276.3U
Authority: CN
Inventors: 李芷萱; 常偊舶; 付强; 冯英国; 赵全忠
Original assignee: Nanjing Huizhi Laser Applied Technology Research Institute Co ltd
Current assignee: Nanjing Huizhi Laser Applied Technology Research Institute Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-09-29
Anticipated expiration: 2030-04-07

Abstract

The utility model discloses a micro-aperture measuring device, including table surface and image acquisition module, still including set up at table surface both ends for table surface slidable XY is to motion module and Z to lifting module, XY installs motion platform to motion module is last, the last rotatable work piece holder of installing of motion platform, rotatable work piece holder is including being fixed in the last revolving stage of motion platform, fixed mounting has anchor clamps in the pivot of revolving stage. The utility model provides a measuring device can measure the micropore aperture on the part surface of shape difference, also can measure the radial micropore of hollow bearing class part and portal the aperture, and has the measurement of efficiency height, and measurement accuracy is high, advantages such as reliability height.

Description

Micro-aperture measuring device

Technical Field

The utility model relates to a micro-aperture measuring device belongs to and measures technical field.

Background

With the rapid development of industrial manufacturing industry in China, the function of precision measurement equipment in the industrial manufacturing process becomes more and more important, and the fields of aerospace, shipbuilding, engines, turbines and the like all need precision measurement technical support. In particular, various mechanical parts generally have precision or ultra-precision machining requirements, and are used for ensuring the performance, the service life and the reliability of the machine. The holes are a common feature in mechanical parts and are widely present in various mechanical parts. The processing requirements of the aperture of many parts are also high, and the precision measurement is often needed after the processing is finished, so the measurement of the aperture of the part is particularly important. With the improvement of the requirement on the processing quality of the micropores, the application of laser drilling is more and more extensive, however, the laser processing of the micropores with a certain thickness usually has conicity, so that the requirement on the processing precision of the aperture of the outlet hole is higher, and the measurement of the aperture of the outlet hole is particularly important. Particularly, the hole diameter of the radial tiny through hole (less than 0.5 mm) on the inner wall of the hollow bearing part has larger measurement difficulty.

Most of the existing methods for measuring the aperture are image-based methods, the aperture is measured by a projection method through an optical microscope, and light is required to be irradiated from the bottom surface to the upper surface or from the upper surface to the bottom surface. For the measurement, the existing method mainly adopts pneumatic measurement, the principle of the method is a comparative measurement method, the measurement method is to convert a size signal into the change of gas flow in a measurement pipeline, and the change is indicated by a buoy in a graduated glass tube, so that the measurement method is called as a buoy type pneumatic measuring instrument; or converting the gas signal into an electric signal through a gas-electric converter, and obtaining a light column indicating value formed by a light-emitting tube, which is called an electronic column type pneumatic measuring instrument. The pneumatic measurement can only comprehensively reflect the influence of the small holes on the gas flowing through the pneumatic measurement, belongs to the measurement of the cross section of the hole, and the obtained indication value can only approximately reflect the hole diameter and the roundness.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the problem that exists among the prior art and not enough, the utility model provides a little aperture measuring device can measure the radial small through-hole aperture of hollow bearing class part to can obviously improve detection efficiency, obtain higher measurement accuracy and stable reliability.

The technical scheme is as follows: a micro-aperture measuring device comprises a working table surface and an image acquisition module, and is characterized in that: still including setting up at table surface both ends for table surface slidable XY is to motion module and Z to lifting module, XY installs the motion platform to moving on the module, but install the rotary workpiece anchor clamps on the motion platform, but the rotary workpiece anchor clamps are including being fixed in revolving stage and driving motor on the motion platform, install anchor clamps on the revolving stage, anchor clamps include chuck base, movable jack catch and jack catch actuating mechanism, the chuck base pass through the shaft coupling with revolving stage fixed connection.

The utility model discloses technical scheme still including install in but motion platform is last rotatable support, but install auxiliary light source on the rotatable support.

Preferably, the rotatable bracket comprises a stainless steel base, a stainless steel bracket and a metal hose; the stainless steel base is fixed on the other side, opposite to the rotating table, of the moving platform, and the bottom of the stainless steel support is inserted into the base and fixed; the bottom end of the metal hose is fixedly connected with the top end of the stainless steel support, and the auxiliary light source is installed at the top end of the metal hose.

Preferably, the XY-direction movement module comprises an X, Y-direction movement guide rail, a first servo motor and a second servo motor; the X-direction moving guide rail is fixedly arranged on the working table surface, the Y-direction moving guide rail is vertically arranged on the X-direction moving guide rail, and the moving platform is fixedly arranged on the Y-direction moving guide rail; the first servo motor and the second servo motor are respectively connected to X, Y directional movement guide rails through couplings.

Preferably, the Z-direction lifting module comprises a lifting platform fixedly mounted on the working platform surface and a lifting guide rail mounted on the lifting platform, and the image acquisition module is fixedly mounted on the lifting guide rail through a connecting piece.

Preferably, the image acquisition module comprises an industrial camera, a telecentric lens and a light source.

Has the advantages that: compared with the prior art, the utility model provides a measuring device can measure the micropore aperture on the part surface of the shape difference, also can measure the radial micropore of hollow bearing class part and portal the aperture, and has the measuring efficiency height, and measurement accuracy is high, advantages such as reliability height.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic structural view of the jig of fig. 1.

Fig. 3 is a perspective schematic view of the workpiece of fig. 1.

Fig. 4 is a schematic structural diagram of the image acquisition module of fig. 1.

In the figure: 1. the device comprises an XY-direction movement module, 2, a rotating table, 3, a clamp, 4, a workpiece, 5, a rotatable support, an auxiliary light source, 6, an image acquisition module, 7 and Z-direction lifting modules, 31, a chuck base, 32, movable clamping jaws, 41, workpiece surface inlet holes, 42, workpiece inner wall outlet holes, 61, an industrial camera, 62, a telecentric lens, 63 and a light source.

Detailed Description

The invention will be further elucidated with reference to the drawings and the specific embodiments.

As shown in fig. 1-3, the present invention provides a micro-aperture measuring device, which comprises an XY-direction moving module 1, a rotating platform 2, a fixture 3, a rotatable support and auxiliary light source 5, an image collecting module 6 and a Z-direction lifting module 7. Wherein:

the XY direction movement module 1 comprises an X, Y direction movement guide rail, a servo motor and a servo motor driver; the X-direction moving guide rail is fixedly arranged on the worktable surface through screws, the Y-direction moving guide rail is arranged on the X-direction moving guide rail through screws, and the position of the Y-direction moving guide rail is adjusted to enable the included angle between the Y-direction moving guide rail and the X-direction moving guide rail to be 90 degrees; an aluminum alloy motion platform with 400mm x 400mm threaded holes is arranged on the Y-direction motion guide rail, and the distance between the threaded holes is 10 mm; the strokes of the X-direction moving guide rail and the Y-direction moving guide rail are not less than 300 mm; the two servo motors are respectively connected to the X, Y directional movement guide rails through couplers, each servo motor is provided with a servo motor driver, and the servo motor drivers control the servo motors to drive the platform to move along the XY direction.

The rotating platform 2 is vertically arranged on the left side of the aluminum alloy moving platform and fixed through screws, and the rotating plane of the rotating platform is vertical to the XY horizontal plane. The stepping motor is connected to the rotating platform through a coupler, and the stepping motor driver drives the rotating platform to rotate through controlling the stepping motor. The diameter of the rotary table top is 200 mm.

Anchor clamps 3 comprise chuck base 31, activity jack catch 32 and jack catch actuating mechanism, and the chuck base in this embodiment is connected fixedly through shaft coupling and revolving stage 2, realizes the clamping to keeping away from central direction motion centre gripping dead axle part inner wall and being close to central direction motion centre gripping non-dead axle part outer wall through three-jaw chuck jack catch actuating mechanism, but the centre gripping diameter is 80 to 160 mm's part.

The Z-direction lifting module 7 is arranged on the right side or the rear side of the working table and comprises a lifting table, a moving guide rail, a servo motor and a servo motor driver; wherein the travel of the motion guide rail is not less than 400 mm; the servo motor is connected to the moving guide rail through the coupler, and the servo motor driver drives the lifting platform to move up and down through controlling the servo motor.

The image acquisition module 6 is fixed on the lifting platform through a clamping piece and comprises an industrial camera 61, a telecentric lens 62 and a light source 63. The industrial camera is arranged above the telecentric lens through a C-shaped interface; the illumination mode adopts coaxial illumination, wherein the light source is a point light source and is illuminated by coaxial light inserted into one side of the telecentric lens, or the annular light source is configured below the telecentric lens for illumination through a universal annular light interface; wherein the industrial camera is a CCD camera or a CMOS camera.

Auxiliary light source module 5, including auxiliary light source and rotatable support, rotatable support is by the stainless steel base, stainless steel support and metal collapsible tube triplex, the stainless steel base passes through the screw fixation on the aluminum alloy platform opposite side for the revolving stage, the stainless steel support bottom is inserted the base and 360 degrees rotations pass through the screw fixation to suitable angle, put into the stainless steel support top and screw up the nut with the metal collapsible tube bottom, auxiliary light source passes through the screw fixation on the metal collapsible tube top, wherein auxiliary light source is the pointolite, or the line source.

The utility model discloses an operation method does:

fixing a hollow bearing part 4 on a rotary table through a clamp, moving a two-dimensional precision motion platform to a proper position and adjusting the rotary table to a proper angle to enable a surface inlet hole 41 to be detected to be positioned under a lens, extending an auxiliary light source into the hollow bearing part, controlling an elevating table to ascend and descend, and manually adjusting the position and the angle of a metal hose so as to adjust the position of the auxiliary light source to enable an outlet hole 42 image of the inner wall of the part to be clear and visible, converting the outlet hole 42 image into a gray-scale image and performing binarization processing, detecting the edge of the image and extracting the outline, performing curve fitting on the extracted outline, acquiring the maximum value, the minimum value and the roundness of the aperture, and judging whether the size and the shape of the aperture.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. A micro-aperture measuring device comprises a working table surface and an image acquisition module, and is characterized in that: still including setting up at table surface both ends for table surface slidable XY is to motion module and Z to lifting module, XY installs the motion platform to moving on the module, but install the rotary workpiece anchor clamps on the motion platform, but the rotary workpiece anchor clamps are including being fixed in revolving stage and driving motor on the motion platform, install anchor clamps on the revolving stage, anchor clamps include chuck base, movable jack catch and jack catch actuating mechanism, the chuck base pass through the shaft coupling with revolving stage fixed connection.

2. The micro-aperture measuring device of claim 1, wherein: the device also comprises a rotatable bracket arranged on the motion platform, and an auxiliary light source is arranged on the rotatable bracket.

3. The micro-aperture measuring device of claim 2, wherein: the rotatable bracket comprises a stainless steel base, a stainless steel bracket and a metal hose; the stainless steel base is fixed on the other side, opposite to the rotating table, of the moving platform, and the bottom of the stainless steel support is inserted into the base and fixed; the bottom end of the metal hose is fixedly connected with the top end of the stainless steel support, and the auxiliary light source is installed at the top end of the metal hose.

4. The micro-aperture measuring device of claim 1, wherein: the XY direction movement module comprises an X, Y direction movement guide rail, a first servo motor and a second servo motor; the X-direction moving guide rail is fixedly arranged on the working table surface, the Y-direction moving guide rail is vertically arranged on the X-direction moving guide rail, and the moving platform is fixedly arranged on the Y-direction moving guide rail; the first servo motor and the second servo motor are respectively connected to X, Y directional movement guide rails through couplings.

5. The micro-aperture measuring device of claim 1, wherein: the Z-direction lifting module comprises a lifting platform fixedly arranged on the working table surface and a lifting guide rail arranged on the lifting platform, and the image acquisition module is fixedly arranged on the lifting guide rail through a connecting piece.

6. The micro-aperture measuring device of claim 5, wherein: the image acquisition module comprises an industrial camera, a telecentric lens and a light source.