CN209820420U - Visual detection device for parameters of leaf-shaped hole-shaped surface - Google Patents
Visual detection device for parameters of leaf-shaped hole-shaped surface Download PDFInfo
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- CN209820420U CN209820420U CN201920922517.4U CN201920922517U CN209820420U CN 209820420 U CN209820420 U CN 209820420U CN 201920922517 U CN201920922517 U CN 201920922517U CN 209820420 U CN209820420 U CN 209820420U
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Abstract
The utility model relates to a visual detection device of leaf shape pass face parameter. The device comprises an industrial camera, a parallel illumination light source, a rotary worktable and a three-dimensional motion mechanism, wherein the rotary worktable and the three-dimensional motion mechanism are arranged on a base. The upper part of the rotary worktable is provided with an annular coaxial stator mounting ring clamp which is used for mounting a stator mounting ring with the characteristic of a blade-shaped hole and can drive the stator mounting ring to perform rotary motion around an axis; the centers of the rotary worktable and the stator mounting ring clamp are of hollow structures, the parallel illumination light source is arranged in the hollow structures through a light source bracket, and the bottom end of the light source bracket is arranged on the base; the three-dimensional motion mechanism is a moving bridge type structure and comprises upright columns and cross beams, the upright columns on two sides are arranged on a base outside the rotary worktable through X-direction guide rail assemblies and can horizontally reciprocate along the X direction of the base, a Z axis capable of horizontally reciprocating along the Y direction of the Z axis is arranged on the cross beam, and a camera mounting seat capable of vertically reciprocating along the Z direction of the Z axis is arranged at the tail end of the Z axis and used for mounting an industrial camera.
Description
Technical Field
The utility model belongs to the technical field of the aeroengine detects, especially, relate to a visual detection device of leaf shape pass face parameter.
Background
In a medium and small-sized aviation turboshaft engine, a stator mounting ring is positioned at the front part of an axial flow casing and is a key part for adjusting the area of an airflow channel so as to adjust the airflow entering the axial flow casing, and the energy conversion efficiency of the engine is directly influenced. Generally speaking, a plurality of vane hole features are uniformly distributed on the cylindrical surface of the stator mounting ring along the circumferential direction for inserting the stator vanes. These lobed holes are hundreds in number in the entire engine, and have various shapes and specifications. In the assembling process of a turboshaft engine, stator blades are required to be installed in the blade-shaped hole features, so that profile parameters (blade profile maximum thickness, front/rear edge radius, blade profile bending, blade profile chord length, position and the like) of each blade-shaped hole determine the quality of stator installation ring parts after the blades are installed, and further, the feasibility, consistency, interchangeability and the like of engine assembling are greatly influenced.
At present, in a production field, operators mostly detect profile parameters of the leaf-shaped hole through a standard sample piece and a conventional three-coordinate measuring machine. The standard sample piece method inserts a standard leaf-shaped sample piece designed and manufactured according to the theoretical molded line of the leaf-shaped hole into the characteristics of the actual leaf-shaped hole, and judges the size of a light leakage gap between the standard leaf-shaped sample piece and the actual leaf-shaped hole by means of lighting light, so that the contour error of the corresponding leaf shape is estimated. In practical application, the method can only roughly judge whether the leaf-shaped hole is qualified or not, but can not obtain other profile parameters, and the manual detection mode has low efficiency and huge workload, can not complete all effective detection work, and can not obtain objective and specific detection data. The conventional three-coordinate measuring machine is adopted to detect the characteristics of the leaf-shaped hole, although higher measurement accuracy can be achieved, because the method collects the coordinate values of all measured points on the outline of the measured leaf-shaped hole through the three-coordinate measuring machine, and then adopts analysis means such as data modeling and the like to obtain the profile parameters such as the geometric dimension, the shape error and the like of the measured leaf-shaped hole. Therefore, in the measuring process, the coordinate values of the measured points need to be collected one by one, so that the measuring process is complex and the efficiency is low; meanwhile, the three-coordinate measuring machine has a measuring head radius, and if the three-coordinate measuring machine meets a leaf-shaped hole with a small size or a thin wall thickness, the three-coordinate measuring machine cannot be used for measuring.
Therefore, to the problem that prior art exists, the utility model people provide a visual detection device of leaf pass face parameter.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a visual detection device of leaf shape pass face parameter has solved the problem that current detection mode is with high costs, the operation is complicated, detection efficiency is low, the precision is poor.
The embodiment of the utility model provides a visual detection device of leaf shape pass face parameter, the device include industry camera, parallel illumination light source and establish rotary table and three-dimensional motion mechanism on the base, rotary table's upper portion is equipped with annular coaxial stator collar anchor clamps for install the stator collar that has the leaf shape hole characteristic, and can drive it around the axis rotary motion, rotary table and the centre of stator collar anchor clamps are hollow structure, parallel illumination light source passes through the light source support to be installed in hollow structure, the bottom of light source support is installed on the base; the three-dimensional motion mechanism is of a moving bridge type structure and comprises upright columns and a cross beam, wherein the upright columns on two sides are arranged on a base outside the rotary worktable through an X-direction guide rail assembly and can horizontally reciprocate along the X direction of the base, a Z axis capable of horizontally reciprocating along the Y direction of the Z axis is arranged on the cross beam, and a camera mounting seat capable of vertically reciprocating along the Z direction of the Z axis is arranged at the tail end of the Z axis and used for mounting the industrial camera.
Furthermore, the rotary worktable is rotatably arranged on the base through a rotating shaft and is positioned in the middle position of the Y-direction stroke of the beam of the three-dimensional motion mechanism.
Furthermore, the center of the rotary table is a rotary table center hole which is communicated up and down to form the hollow structure, and a circular grating ruler is arranged in the rotary table and used for enabling the rotary table to rotate accurately.
Furthermore, the light source bracket is fixedly arranged on the base, and the parallel illumination light source is detachably arranged at the top end of the light source bracket, so that the light source is opposite to the industrial camera; during detection, the rotary worktable makes rotary motion, and the parallel illumination light source and the industrial camera are kept static.
Further, the industrial camera is rotatably mounted on the camera mount for adjusting a spatial attitude thereof.
Furthermore, an air floatation guide rail and a linear grating ruler are arranged in the X direction of the guide rail assembly, the Y direction of the cross beam and the Z direction of the Z axis.
Furthermore, the stator mounting ring clamp is in an annular disc shape, three movable clamping jaws are uniformly distributed along the circumferential direction of the annular disc of the stator mounting ring clamp, and the movable clamping jaws can simultaneously approach to or withdraw from the center along the radial direction and are used for positioning and clamping the stator mounting rings with different diameters.
Further, the parallel illumination light source generates uniform direct telecentric parallel light with high collimation degree.
Furthermore, the industrial camera comprises a telecentric lens and a camera, the focal length of the telecentric lens enables the industrial camera to form a clear image of the characteristic of the detected leaf-shaped hole in the X-direction moving range, and the camera adopts a black-and-white CCD or a color CCD.
Furthermore, the visual detection device also comprises an industrial personal computer which is connected with and controls the industrial camera, the parallel illumination light source, the rotary worktable and the three-dimensional motion mechanism.
To sum up, the utility model provides a pair of visual detection device of leaf shape pass face parameter is applicable to the stator collar of multiple different diameter sizes, can carry out non-contact detection to the profile parameter of whole leaf shape hole characteristics of distributing on it to describe the actual condition in every leaf shape hole really, can provide the feedback link for the course of working, in order to produce the leaf shape hole characteristic that accords with the designing requirement. The device of the utility model sets up compact structure, the commonality is strong, measurement accuracy is high, and convenient to use can carry out automated measurement moreover, provides a technical means and a method of low cost, high accuracy, high efficiency and high uniformity for leaf shape hole processingquality detects, also can be applied to the shape of other kinds of dysmorphism hole characteristics and positional parameter's detection in a flexible way.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a visual inspection device for parameters of a leaf-shaped hole pattern surface of the present invention.
FIG. 2 is a schematic view of the installation of the parallel illumination source, the light source bracket, the stator mounting ring clamp and the rotary table.
Fig. 3 is a schematic structural view of the stator mounting ring clip.
Fig. 4 is a schematic structural view of the rotary table.
FIG. 5 is a schematic view of a parallel illumination light source and a light source holder.
Fig. 6 is a leaf hole image collected by the visual inspection device for leaf hole surface parameters of the present invention.
In the figure:
1-a stator mounting ring; 2-the leaf-shaped hole characteristics to be detected; 3-stator mounting ring clamp; 4-a rotary table; 5-a light source support; 6-parallel illumination light source; 7-a base; 8-an industrial camera; 9-a camera mount; 10-a three-dimensional motion mechanism; 11-movable claws; 12-clamp centre hole; 13-turntable center hole.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, substitutions and improvements in the parts, components and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a schematic view of a visual inspection apparatus for parameters of a leaf-shaped hole pattern. The device at least comprises an industrial camera 8, a parallel illumination light source 6, a rotary workbench 4 and a three-dimensional movement mechanism 10, wherein the rotary workbench 4 and the three-dimensional movement mechanism 10 are arranged on a base 7, the upper part of the rotary workbench 4 is provided with an annular coaxial stator mounting ring clamp 3 which is used for mounting a stator mounting ring 1 with a leaf-shaped hole characteristic 2 and can drive the stator mounting ring to rotate around an axis (a rotation movement axis A in figure 1), the centers of the rotary workbench 4 and the stator mounting ring clamp 3 are of a hollow structure, the parallel illumination light source 6 is mounted in the hollow structure through a light source support 5, and the bottom end of the light source support 5 is mounted on the base 7; the three-dimensional movement mechanism 10 is of a moving bridge type structure and comprises upright columns and a cross beam, the upright columns on two sides are arranged on the base 7 on the outer side of the rotary worktable 4 through X-direction guide rail assemblies and can horizontally reciprocate along the X direction of the base 7, a Z axis capable of horizontally reciprocating along the Y direction of the Z axis is arranged on the cross beam, and a camera mounting seat 9 capable of vertically reciprocating along the Z direction of the Z axis is arranged at the tail end of the Z axis and used for mounting the industrial camera 8.
Preferably, the visual detection device may further include an industrial personal computer (not shown in the figure), and the industrial personal computer is connected with and can control the industrial camera 8, the parallel illumination light source 6, the rotary table 4 and the three-dimensional motion mechanism 10, so that automatic control detection can be realized.
Thus, referring to fig. 1, the device has four-dimensional motion paths, namely X, Y, Z three linear motions and a rotary motion around the rotary axis a of the three-dimensional motion mechanism 10. X, Y, Z three linear motion directions are orthogonal, the X-direction motion and the Y-direction motion are in the horizontal plane, the Z-direction motion is in the vertical direction and accords with the right-hand rule, and the X-direction, the Y-direction of the beam and the Z-direction of the Z-axis of the guide rail assembly are provided with the air-float guide rail and the linear grating ruler, so that the motion stability and the displacement precision of each linear axis are ensured. The direction of the rotary axis of the rotary shaft A is parallel to the moving direction of the Z direction. In the four-dimensional motion layout of the visual inspection device, X, Y, Z the functional structures of three linear motion axes are integrated together, and the rotary motion axis A is arranged separately.
As a preferred embodiment, the rotary table 4 is rotatably fixed to the base 7 by a rotary shaft (a rotary motion axis a in fig. 1), and the rotary table 4 is located at a middle position of a stroke in the direction Y of the cross beam of the three-dimensional motion mechanism 10. The axis of rotation of the rotary table 4 can be made parallel to the Z-axis of the apparatus by mechanical adjustment.
It should be noted that the utility model discloses a base 7 adopts marble or the preparation of natural granite that has good thermal stability to form, can bear certain external shock and interference to its upper surface is through the check back of net method, and the surface smoothness reaches 00 grades of standards.
Further, as shown in fig. 4, the rotary table 4 has a central hole 13 through the rotary table at the center thereof, which is formed in a hollow structure, and a high-precision circular grating ruler is built in the rotary table, so that the rotary table can be precisely rotated to a set angular position, and further, the top surface of the rotary table 4 is required to be flat enough.
Referring to fig. 2 and 5, the light source bracket 5 is fixedly arranged on the base 7, and the parallel illumination light source 6 is detachably arranged at the top end of the light source bracket 5, so that the light source is opposite to the industrial camera 8; during detection, the rotary table 4 makes rotary motion, and the parallel illumination light source 6 and the industrial camera 8 are kept static.
As another preferred embodiment, the industrial camera 8 is rotatably mounted on the camera mount 9 for adjusting its spatial attitude. The imaging optical axis of the industrial camera 8 can be made parallel to the X-axis direction of the three-dimensional movement mechanism 10 by mechanical adjustment.
As another preferred embodiment, referring to fig. 3, the stator mounting ring clamp 3 has a circular disk shape with a clamp center hole 12 and three movable jaws 11. The three movable clamping jaws 11 are uniformly distributed along the circumference of the annular disc of the stator mounting ring clamp 3, the included angle between every two adjacent movable clamping jaws 11 is 120 degrees, and the three movable clamping jaws 11 can simultaneously approach or withdraw from the center along the radial direction, so that the stator mounting rings 1 with different diameters can be positioned and clamped. The stator mounting ring clamp 3 is arranged on the table surface of the rotary working table 4, and the position of the stator mounting ring clamp is adjusted to enable the inner circle determined by the three movable clamping jaws 11 to be coaxial with the rotary axis of the rotary working table 4, so that the geometric axis of the clamped stator mounting ring 1 is ensured to be coincident with the rotary axis of the rotary working table 4.
The collimated illumination source 6 is capable of generating uniform high collimation direct telecentric collimated parallel light to provide back illumination for the leaf-shaped aperture feature 2 under test. In specific implementation, the parallel illumination light source 6 is installed on the light source support 5 to form a light source assembly, and then the light source assembly is integrally inserted into a clamp center hole 12 on the stator mounting ring clamp 3 and a turntable center hole 13 (hollow structure) on the rotary table 4, and the bottom of the light source support 5 is fixed on the base 7.
The industrial camera 8 comprises a telecentric lens and a camera and can communicate with an industrial personal computer through a data line, wherein the focal length of the telecentric lens can enable the industrial camera 8 to form a clear image for the leaf-shaped hole feature 2 to be detected in the X-direction moving range; the camera can adopt a black-and-white CCD or a color CCD.
The utility model discloses an in the device, parallel illumination light source 6 and industry camera 8 are located the front and back both sides of being surveyed leaf shape hole characteristic 2 respectively, and even and stable light that is sent by parallel illumination light source 6 jets from being surveyed leaf shape hole characteristic 2's the back and illuminates being surveyed leaf shape hole characteristic 2, then gets into industry camera 8's telecentric lens and forms images on the photosurface, can obtain being surveyed the clear image of leaf shape hole characteristic 2. When the leaf-shaped hole features 2 at different positions are detected, the detected position can be rotated to the position opposite to the industrial camera 8 by rotating the rotary worktable 4, so that the detected position is only required to be irradiated with a light source, and the light source is not required to be arranged on the whole circle of leaf-shaped hole of the stator mounting ring 1, so that the energy can be saved, the interference factor is reduced, and the detection precision is improved.
Adopt the utility model discloses a visual detection device can place the device in the darkroom environment when carrying out leaf shape pass face parameter detection to weaken ambient light to the interference and the influence of formation of image and measurement accuracy, specific measuring step is as follows:
1. the stator mounting ring 1 is placed in a stator mounting ring clamp 3, and the stator mounting ring 1 is positioned and clamped through three movable clamping jaws 11.
2. Energizing the parallel illumination light source 6 to make the parallel illumination light source emit light to illuminate the detected leaf-shaped hole features 2, driving the industrial camera 8 to move by controlling the X-direction, Y-direction and Z-direction movement of the three-dimensional movement mechanism 10, making the imaging optical axis of the industrial camera 8 vertically intersected with the geometric axis of the stator mounting ring 1, and controlling the rotation of the rotary worktable 4 to make the stacking axis of the detected leaf-shaped hole features 2 on the stator mounting ring 1 parallel to the imaging optical axis of the industrial camera 8; the focal length is adjusted so that the industrial camera 8 can acquire a clear and complete image of the leaf-shaped hole feature 2 to be detected (see fig. 6).
3. Establishing a measurement coordinate system of the measured leaf-shaped hole feature 2, controlling an industrial camera 8 to collect an image of the measured leaf-shaped hole feature 2, then performing image processing processes such as noise reduction filtering, histogram equalization, single threshold segmentation, morphology processing, edge detection and pixel size equivalent calibration on the image, extracting coordinate values of all pixels on the outline of the leaf-shaped hole feature 2, and converting the coordinate values into the measurement coordinate system.
4. And calculating profile parameters (maximum thickness of a blade profile, thickness of a front/rear edge, radius of the front/rear edge, bending of the blade profile, chord length and position of the blade profile and the like) required by the position according to the coordinate values of all pixels on the outline of the blade-shaped hole feature 2 to be detected, controlling the rotary worktable 4 to drive the stator mounting ring 1 to rotate, enabling the next blade-shaped hole feature 2 to be detected to enter a measuring area, and repeating the steps 2 and 3 to realize the profile parameter detection of all the blade-shaped hole features 2 to be detected on the stator mounting ring 1. Meanwhile, the stator mounting ring 1 with different diameters can be clamped by adjusting the positions of the three movable clamping claws 11 on the stator mounting ring clamp 3.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The visual detection device for the profile parameters of the leaf-shaped hole is characterized by comprising an industrial camera, a parallel illumination light source, a rotary worktable and a three-dimensional motion mechanism, wherein the rotary worktable and the three-dimensional motion mechanism are arranged on a base; the centers of the rotary worktable and the stator mounting ring clamp are of hollow structures, the parallel illumination light source is mounted in the hollow structures through a light source support, and the bottom end of the light source support is mounted on the base; the three-dimensional motion mechanism is of a moving bridge type structure and comprises upright columns and a cross beam, wherein the upright columns on two sides are arranged on a base outside the rotary worktable through an X-direction guide rail assembly and can horizontally reciprocate along the X direction of the base, a Z axis capable of horizontally reciprocating along the Y direction of the Z axis is arranged on the cross beam, and a camera mounting seat capable of vertically reciprocating along the Z direction of the Z axis is arranged at the tail end of the Z axis and used for mounting the industrial camera.
2. The visual inspection device of the parameters of the leaf-shaped hole pattern surfaces as claimed in claim 1, wherein the rotary table is rotatably arranged on the base through a rotating shaft and is located at the middle position of the Y-direction stroke of the beam of the three-dimensional movement mechanism.
3. The visual inspection device of the parameters of the leaf-shaped hole-shaped surfaces as claimed in claim 2, wherein the center of the rotary table is a vertically through center hole of the rotary table to form the hollow structure, and a circular grating ruler is arranged inside the rotary table for precisely rotating the rotary table.
4. The visual inspection device of the parameters of the leaf-shaped hole pattern surfaces as claimed in claim 1, wherein the light source bracket is fixedly arranged on the base, and the parallel illumination light source is detachably arranged at the top end of the light source bracket, so that the light source is opposite to the industrial camera; during detection, the rotary worktable makes rotary motion, and the parallel illumination light source and the industrial camera are kept static.
5. The visual inspection device of leaf pass face parameters of claim 1, wherein said industrial camera is rotatably mounted on said camera mount for adjusting its spatial attitude.
6. The visual inspection device of the parameters of the leaf-shaped hole patterns according to claim 1, characterized in that an air-floating guide rail and a linear grating ruler are installed in the X direction of the guide rail assembly, the Y direction of the cross beam and the Z direction of the Z axis.
7. The visual inspection device of the parameters of the lobed hole pattern as claimed in claim 1, wherein the stator mounting ring fixture is in the shape of an annular disc, and three movable jaws are uniformly distributed along the circumference of the annular disc of the stator mounting ring fixture, and the movable jaws can simultaneously approach or withdraw from the center along the radial direction for positioning and clamping the stator mounting rings with different diameters.
8. The visual inspection device of leaf groove surface parameters of claim 1, wherein the parallel illumination light source produces uniform high collimation direct telecentric parallel light.
9. The visual inspection device of leaf hole pattern parameters of claim 1, wherein the industrial camera comprises a telecentric lens and a camera, the focal length of the telecentric lens enables the industrial camera to clearly image the leaf hole pattern feature to be inspected within the moving range of the X direction, and the camera adopts a black-and-white CCD or a color CCD.
10. The visual inspection device of leaf groove surface parameters of any one of claims 1-9, further comprising an industrial personal computer connected to and controlling the industrial camera, the parallel illumination light source, the rotary table and the three-dimensional motion mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920922517.4U CN209820420U (en) | 2019-06-19 | 2019-06-19 | Visual detection device for parameters of leaf-shaped hole-shaped surface |
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| CN201920922517.4U CN209820420U (en) | 2019-06-19 | 2019-06-19 | Visual detection device for parameters of leaf-shaped hole-shaped surface |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814568A (en) * | 2021-10-13 | 2021-12-21 | 大连理工大学 | Automatic welding equipment and method for large-taper powder cylinder |
| CN114111629A (en) * | 2021-12-15 | 2022-03-01 | 北京航星机器制造有限公司 | Visual detection device and detection method for outer wall surface of cylindrical part |
| CN114199131A (en) * | 2021-12-15 | 2022-03-18 | 北京航星机器制造有限公司 | Cylindrical part measuring device and measuring method capable of achieving accurate position adjustment |
-
2019
- 2019-06-19 CN CN201920922517.4U patent/CN209820420U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814568A (en) * | 2021-10-13 | 2021-12-21 | 大连理工大学 | Automatic welding equipment and method for large-taper powder cylinder |
| CN114111629A (en) * | 2021-12-15 | 2022-03-01 | 北京航星机器制造有限公司 | Visual detection device and detection method for outer wall surface of cylindrical part |
| CN114199131A (en) * | 2021-12-15 | 2022-03-18 | 北京航星机器制造有限公司 | Cylindrical part measuring device and measuring method capable of achieving accurate position adjustment |
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