Five-axis CCD small hole detection machine

Abstract

A five-axis CCD small hole detection machine disclosed by the present invention comprises a computer, an automatic detection module and a control cabinet, the automatic detection module comprises a CCD camera driving sub-module and a workpiece driving sub-module, the CCD camera driving sub-module comprises a CCD camera, a Z-axis lead screw driving mechanism and a camera moving seat, the Z-axis lead screw driving mechanism is installed on a back plate, the Z-axis lead screw driving mechanism is installed on the back plate, and the camera moving seat is installed on the computer. The camera moving seat is mounted on the Z-axis lead screw driving mechanism, and the CCD camera is vertically and downwards mounted on the camera moving seat; the workpiece driving submodule comprises an angle table, an X-axis lead screw motor, a mounting support and a workpiece clamping seat, the mounting support is mounted on the angle table, and the workpiece clamping seat is fixed to the face, facing the back plate, of the mounting support. The workpiece clamping base comprises a rotating motor and an inner supporting clamp installed at the power output end of the rotating motor. In this way, the detection efficiency of the tiny inclined hole in the circular workpiece can be improved.

Description

Technical Field

[0001] The present invention relates to the field of detection equipment, in particular to a five-axis CCD small hole detection machine. Background Art

[0002] During the production process, some workpiece components require machining small holes on their surfaces for assembly. The machining quality of these small holes directly affects the quality stability of the final workpiece. Traditionally, manual surface inspection is used for small holes, but when there are a large number of small holes, it is impossible to inspect each small hole. With the development of the times and the advancement of technology, some manufacturers have begun to introduce dedicated CCD camera detection systems, which combine computer image processing technology to process photos and quickly detect small holes. However, in actual use, existing detection devices of this type generally take photos from top to bottom. Although there are generally some angle adjustment structures, the detection effect is not good for circular array microholes on some annular workpieces, especially for some tiny inclined holes, which are difficult to align when taking photos. Customized special fixtures are usually required, and the detection efficiency is low. Summary of the Invention

[0003] The main technical problem solved by the present invention is to provide a five-axis CCD small hole detection machine, which can improve the detection efficiency of small inclined holes on circular workpieces.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a five-axis CCD small hole detection machine, including: a computer, an automatic detection module and a control cabinet, a protective cover is installed on the top of the control cabinet, and a detection platform and a back plate are provided on the top of the control cabinet inside the protective cover, the back plate and the detection platform are perpendicular to each other, the detection platform is installed with a Y-axis adjustment screw, which can drive the detection platform to translate as a whole, the automatic detection module is installed on the detection platform and the back plate, the computer is installed on the outside of the control cabinet, and is connected to the automatic detection module signal, the automatic detection module includes a CCD camera driving submodule and a workpiece driving submodule, the CCD camera driving submodule includes a CCD camera, a Z-axis screw driving mechanism and a camera moving seat, the Z-axis screw driving mechanism is installed on the back plate, and the camera moving seat is installed on the On the Z-axis screw drive mechanism, a camera holder is provided on the camera moving seat, and the CCD camera is installed vertically downward on the camera holder. The Z-axis screw drive mechanism can drive the camera moving seat to drive the CCD camera to move up and down through the camera holder; the workpiece driving submodule includes an angle table, an X-axis screw motor, a mounting bracket and a workpiece clamping seat, the angle table is installed on the detection platform table, the X-axis screw motor is installed at the bottom of the angle table, and can drive the angle table to reciprocate along the X-axis of the detection platform table, the mounting bracket is installed on the angle table, and the workpiece clamping seat is fixed on the side of the mounting bracket facing the back plate, and the workpiece clamping seat includes a rotating motor and an internal support clamp, and the power output end of the rotating motor is provided with a clamp fixing position, and the internal support clamp can be installed on the clamp fixing position.

[0005] In a preferred embodiment of the present invention, the Z-axis screw drive mechanism includes a Z-axis drive motor, a threaded screw and a limiting rail, the threaded screw is connected to the power output end of the Z-axis drive motor, the limiting rail is installed on the back plate, and the camera moving seat is installed on the threaded screw and the bottom is slidably connected to the limiting rail.

[0006] In a preferred embodiment of the present invention, the CCD camera is equipped with a 45° spectroscopic lens. The 45° spectroscopic lens has two optical paths, one horizontal and one vertical, with a splitting ratio of 5:5. Each optical path corresponds to a backlight source. The horizontal optical path corresponds to an upper backlight source, which is mounted on the top of the mounting bracket. The vertical optical path corresponds to a lower backlight source, which is mounted on the detection platform directly below the Z-axis screw drive mechanism. The camera moving base is also equipped with an NG marking mechanism. There are two NG marking mechanisms, namely a first NG marking mechanism and a second NG marking mechanism. The first NG marking mechanism matches the horizontal optical path and includes a first NG cylinder and a first NG marker pen. The first NG marker pen is fixed to the pen holder at the top of the telescopic rod of the first NG cylinder. The second NG marking mechanism matches the vertical optical path and includes a second NG cylinder and a second NG marker pen. The second NG marker pen is fixed to the pen holder at the top of the telescopic rod of the second NG cylinder.

[0007] In a preferred embodiment of the present invention, the rotating motor is a DD motor. The fixture fixing position is installed at the top of the power output shaft of the DD motor and can rotate with the power output shaft. A plurality of positioning bolt holes are evenly arranged around the fixture fixing position. The internal support fixture includes multiple specifications. Each specification of the internal support fixture includes an internal support head and a support plate. The internal support head is fixed to the center of the support plate. The middle of the support plate is provided with bolt through holes corresponding to the positioning bolt holes on the fixture fixing position. A positioning sleeve is also installed on the housing of the DD motor. The positioning sleeve is sleeved on the outside of the fixture fixing position.

[0008] In a preferred embodiment of the present invention, the mounting bracket is a right-angled trapezoidal structure, and the side of the right-angled trapezoidal structure facing the back plate is an inclined surface, and the bottom angle corresponding to the inclined surface is 60° to 80°.

[0009] In a preferred embodiment of the present invention, the angle adjustment range of the inclinometer is ±30°.

[0010] The beneficial effects of the present invention are as follows: the present invention is based on a traditional small hole detection mechanism and is provided with an angle table and a rotary motor with adjustable angles, and the traditional X, Y and Z axis three-axis adjustment mechanism is improved to a five-axis adjustment mechanism. In this way, the posture of a circular workpiece can be adjusted through five dimensions during detection, so that the inclined small hole opened on the workpiece can be aligned with the optical path of the CCD camera lens at the position to be inspected, and an image inside the hole can be obtained. The aperture of the small hole can be accurately measured and burrs inside the small hole can be discovered. Moreover, different positions of the workpiece can be detected by controlling the rotation of the rotary motor, and the entire detection process is fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the assembly structure of a preferred embodiment of the present invention;

[0012] Figure 2 Schematic diagram of the structure of the detection module in the embodiment shown;

[0013] Figure 3 is a schematic diagram of a method for clamping a workpiece to be inspected in the illustrated embodiment;

[0014] Figure 4 Schematic diagram of the fixture installation position in the embodiment shown;

[0015] Figure 5 Schematic diagram of the installation method of an internal support fixture of one specification in the embodiment shown;

[0016] Figure 6 Schematic diagram of the installation method of another specification of the inner support clamp in the embodiment shown;

[0017] The markings of the components in the accompanying drawings are as follows:

[0018] 1. Workpiece, 2. Computer, 3. Control cabinet, 4. Protective cover, 5. Detection module, 6. Hexagonal wrench;

[0019] 301. Detection platform, 302. Back panel;

[0020] 501. X-axis leadscrew motor, 502. Angle table, 503. Mounting bracket, 504. Upper backlight, 505. Lower backlight, 506. Rotating motor, 5061. Housing, 5062. Positioning sleeve, 5063. Fixture fixing position, 507. Internal support fixture, 5071. Internal support head, 5072. Pallet, 508. CCD camera, 509. Optical path, 5010. Second NG marker, 5011. First NG marker, 5012. First marker drive cylinder, 5013. Second marker drive cylinder, 5014. Z-axis drive motor, 5015. Lead screw, 5016. Camera moving base. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] See also Figures 1 to 6 , embodiments of the present invention include:

[0023] A five-axis CCD small hole detection machine includes: a computer 2, an automatic detection module and a control cabinet 3, a protective cover 4 is installed on the top of the control cabinet 3, a detection platform 301 and a back plate 302 are provided on the top of the control cabinet 3 inside the protective cover 4, the back plate 302 and the detection platform 301 are perpendicular to each other, a Y-axis adjustment screw is installed on the detection platform 301, which can drive the detection platform 301 to translate along the Y-axis direction as a whole, and the maximum translation distance is 150mm, the automatic detection module is installed on the detection platform 301 and the back plate 302, the computer 2 is installed on the outside of the control cabinet 3, and the signal of the automatic detection module is connected to the computer 2. The automatic detection module includes a CCD camera driving submodule and a workpiece driving submodule, the CCD camera driving submodule includes a CCD camera 508, a Z-axis screw driving mechanism and a camera moving seat 5016, the Z-axis screw driving mechanism is installed on the back plate 302, the Z-axis screw driving mechanism includes a Z-axis drive motor 5014, a threaded screw 5015 and a limiting rail, the threaded screw 5015 is connected to the power output end of the Z-axis drive motor 5014, the limiting rail is installed on the back plate 302, the camera moving seat 5016 is installed on the threaded screw 5015 and the bottom is connected to the The limiting track is slidably connected, and a camera frame is provided on the camera moving seat 5016. The CCD camera 508 is installed vertically downward on the camera frame. The Z-axis screw drive mechanism can drive the camera moving seat 5016 to drive the CCD camera 508 to move up and down through the camera frame, and the maximum movement distance is 250mm; the workpiece driving submodule includes an angle table 502, an X-axis screw motor 501, a mounting bracket 503 and a workpiece clamping seat. The angle table 502 is installed on the surface of the detection platform 301, and the X-axis screw motor 501 is installed at the bottom of the angle table 502, which can drive the angle table 502 reciprocates along the X-axis of the table top of the detection platform 301, and the maximum distance of the reciprocating motion is 500mm. The mounting bracket 503 is installed on the angle table 502. The mounting bracket 503 is a right-angled trapezoidal structure. The side of the right-angled trapezoidal structure facing the back plate 302 is an inclined surface, and the bottom angle corresponding to the inclined surface is 75°. The workpiece clamping seat is fixed on the inclined surface of the mounting bracket 503. The workpiece clamping seat includes a rotating motor 506 and an internal support clamp 507. The power output end of the rotating motor 506 is provided with a clamp fixing position 5063, and the internal support clamp 507 can be installed on the clamp fixing position 5063.Through this structure, after the circular workpiece 1 is mounted on the internal support fixture 507, the angle of the angle table 502 can be adjusted according to the required inclination angle of the small hole in the workpiece 1, and the X-axis screw motor 501 can be adjusted at the same time, so that the optical path 509 of the CCD camera 508 can be aligned with the inclined hole on the workpiece 1 so that the optical path 509 can enter the inclined hole, and then the focal length of the CCD camera 508 is adjusted by the Z-axis drive motor 5014 to make the image of the CCD camera 508 clearer.

[0024] The CCD camera 508 is mounted with a 45° beam splitter lens. This 45° beam splitter lens has two optical paths 509: a horizontal optical path 509 and a vertical optical path 509. The split ratio of these two optical paths 509 is 5:5. Each optical path 509 corresponds to a backlight source. The horizontal optical path 509 corresponds to an upper backlight source 504, which is mounted on top of the mounting bracket 503. The vertical optical path 509 corresponds to a lower backlight source 505, which is mounted on the surface of the detection platform 301 directly below the Z-axis screw drive mechanism. The camera moving base 5016 is also equipped with two NG marking mechanisms: a first NG marking mechanism and a second NG marking mechanism. The first NG marking mechanism aligns with the horizontal optical path 509 and includes a first NG cylinder 5011 and a first NG marker 5012, which is secured to a pen holder at the top of the telescopic rod of the first NG cylinder 5012. The second NG marking mechanism aligns with the vertical optical path 509 and includes a second NG cylinder 5013 and a second NG marker 5010, which is secured to a pen holder at the top of the telescopic rod of the second NG cylinder 5013. In this manner, during actual inspection, the computer 2 can switch the optical paths 509 of the 45° beam splitter lens as needed to capture image information of the workpiece 1. Each optical path 509 is equipped with a corresponding backlight source to open up its corresponding field of view, reducing the impact of external light on image acquisition and improving inspection accuracy. Furthermore, the two NG marking mechanisms can promptly mark problematic locations based on the image detection results, facilitating subsequent repairs.

[0025] The rotary motor 506 is a DD motor. A fixture fixing portion 5063 is mounted on the top of the power output shaft of the DD motor. The fixture fixing portion 5063 is capable of rotating with the power output shaft. Eight positioning bolt holes are evenly distributed around the fixture fixing portion 5063. The internal support fixture 507 is available in various sizes. Each size of internal support fixture 507 includes an internal support head 5071 and a support plate 5072. The internal support head 5071 is fixed to the center of the support plate 5072. Bolt holes are provided in the middle of the support plate 5072, surrounding the fixed position of the internal support head 5071 and corresponding to the positioning bolt holes on the fixture fixing portion 5063. A positioning sleeve 5062 is also mounted on the housing 5061 of the DD motor. The positioning sleeve 5062 is sleeved around the outside of the fixture fixing portion 5063. The DD motor is used because it has high torque and does not require a speed reducer. This allows the internal support fixture 507 to be directly mounted on the fixture fixing portion 5063 of the DD motor. Computer 2 can conveniently control the rotation of the DD motor to precisely position and photograph the workpiece at different locations. Positioning sleeve 5062, mounted outside fixture fixing portion 5063, improves the stability of fixture fixing portion 5063's rotation and reduces radial vibration.

[0026] The present invention adds two rotating axes based on the angle table 502 and the DD motor position on the basis of the X-axis, Y-axis and Z-axis of the conventional small hole detection machine. These two rotating axes, combined with the original X-axis, Y-axis and Z-axis motion modes, can significantly improve the posture adjustment range of the workpiece 1 to be inspected, thereby meeting the requirements of small hole detection on different types of circular workpieces 1. The workpiece 1 can be tilted in the corresponding direction as needed, so that the small hole at the detection position can be aligned with the optical path 509 of the CCD camera 508 lens, which is convenient for the CCD camera 508 to collect the detection image. Moreover, in actual use, the high-resolution black and white CCD camera 508 used is combined with an ultra-long focal length spectroscopic dual-field customized lens and two backlight sources at different angles to switch the camera's field of view at any time as needed. The taken photos are immediately sent to the computer 2 for judgment, and the computer 2 can control the corresponding NG marker according to the judgment result to automatically mark the position where the small hole diameter is NG or there are burrs. Moreover, as Figure 5 and Figure 6 As shown in the figure, the present invention has a plurality of different specifications of internal support fixtures 507, which can be matched with different internal support fixtures according to the type of workpiece 1 to be measured. When the internal support fixture 507 is switched, only the hexagonal wrench 6 is needed to complete all disassembly and installation actions.

[0027] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A five-axis CCD small hole detection machine, comprising: A computer, an automatic detection module and a control cabinet, a protective cover is installed on the top of the control cabinet, a detection platform and a back plate are provided on the top of the control cabinet inside the protective cover, the back plate and the detection platform are perpendicular to each other, the detection platform is installed with a Y-axis adjustment screw, which can drive the detection platform to translate as a whole, the automatic detection module is installed on the detection platform and the back plate, the computer is installed on the outside of the control cabinet, and is connected to the automatic detection module signal, characterized in that the automatic detection module includes a CCD camera driving submodule and a workpiece driving submodule, the CCD camera driving submodule includes a CCD camera, a Z-axis screw driving mechanism and a camera moving seat, the Z-axis screw driving mechanism is installed on the back plate, the camera moving seat is installed on the Z-axis screw driving mechanism, the camera moving A camera holder is provided on the seat, and the CCD camera is installed vertically downward on the camera holder, and the Z-axis screw drive mechanism can drive the camera moving seat to drive the CCD camera to move up and down through the camera holder; the workpiece driving submodule includes an angle table, an X-axis screw motor, a mounting bracket and a workpiece clamping seat, the angle table is installed on the detection platform table, the X-axis screw motor is installed at the bottom of the angle table, and can drive the angle table to reciprocate along the X-axis of the detection platform, the mounting bracket is installed on the angle table, and the workpiece clamping seat is fixed on the side of the mounting bracket facing the back plate, and the workpiece clamping seat includes a rotating motor and an internal support clamp, and a clamp fixing position is set at the power output end of the rotating motor, and the internal support clamp can be installed on the clamp fixing position.

2. The five-axis CCD small hole detection machine according to claim 1, characterized in that: The Z-axis screw drive mechanism includes a Z-axis drive motor, a threaded screw and a limiting rail. The threaded screw is connected to the power output end of the Z-axis drive motor, the limiting rail is installed on the back plate, and the camera moving seat is installed on the threaded screw and the bottom is slidably connected to the limiting rail.

3. The five-axis CCD small hole detection machine according to claim 1, characterized in that: The CCD camera is equipped with a 45° beam splitter lens. The 45° beam splitter lens has two optical paths, one horizontal and one vertical. The splitting ratio of the two optical paths is 5:

5.

4. The five-axis CCD small hole detection machine according to claim 3, characterized in that: Each optical path corresponds to a backlight source, the horizontal optical path corresponds to an upper backlight source, the upper backlight source is installed on the top of the mounting bracket, the vertical optical path corresponds to a lower backlight source, and the lower backlight source is installed on the detection platform table directly below the Z-axis screw drive mechanism.

5. The five-axis CCD small hole detection machine according to claim 3, characterized in that: The camera moving base is also equipped with an NG marking mechanism. There are two NG marking mechanisms, namely the first NG marking mechanism and the second NG marking mechanism. The first NG marking mechanism matches the horizontal optical path, including a first NG cylinder and a first NG marking pen. The first NG marking pen is fixed on the pen holder at the top of the telescopic rod of the first NG cylinder. The second NG marking mechanism matches the vertical optical path, including a second NG cylinder and a second NG marking pen. The second NG marking pen is fixed on the pen holder at the top of the telescopic rod of the second NG cylinder.

6. The five-axis CCD small hole detection machine according to claim 1, characterized in that: The rotating motor is a DD motor, and the clamp fixing position is installed at the top end of the power output shaft of the DD motor and can rotate with the power output shaft. A plurality of positioning bolt holes are evenly arranged on the clamp fixing position. The internal support clamp includes multiple specifications, and each specification of the internal support clamp includes an internal support head and a support plate. The internal support head is fixed at the center of the support plate, and bolt through holes corresponding to the positioning bolt holes on the clamp fixing position are arranged in the middle of the support plate around the internal support head fixing position.

7. The five-axis CCD small hole detection machine according to claim 6, characterized in that: A positioning sleeve is also installed on the housing of the DD motor, and the positioning sleeve is sleeved on the outside of the fixture fixing position.

8. The five-axis CCD small hole detection machine according to claim 1, characterized in that: The mounting bracket is a right-angled trapezoidal structure, and a side of the right-angled trapezoidal structure facing the back plate is an inclined surface.

9. The five-axis CCD small hole detection machine according to claim 8, characterized in that: The bottom angle corresponding to the inclined surface is 60° to 80°.

10. The five-axis CCD small hole detection machine according to claim 1, characterized in that: The angle adjustment range of the inclinometer is ±30°.

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