A device for detecting surface defects of a workpiece

Abstract

The present invention relates to a workpiece surface defect detection device in the field of workpiece surface detection. In this solution, a processing terminal can quickly locate and focus an image entry module by sending positioning information to a cross positioning module to take a photo of a corresponding position, and perform secondary positioning detection on a workpiece to be detected with unclear defects. The workpiece to be detected that has not been found to have obvious defects after the secondary positioning detection is manually inspected. During the secondary positioning process of a travel electromagnetic slider and an image entry module, the processing terminal can judge the travel position of the travel electromagnetic slider and the image entry module by the light intensity received by a photosensitive unit, and then fine-tune the position of the travel electromagnetic slider and the image entry module, so that the position of the secondary positioning detection picture information taken by the image entry module is more accurate, thereby reducing the system error caused by excessive use times and not easily affecting the workpiece surface defect detection effect.

Description

Technical Field

[0001] The present invention relates to a workpiece surface defect detection device, in particular to a workpiece surface defect detection device applied to the field of workpiece surface detection. Background Art

[0002] Workpiece surface defects are the result of stress induction in the workpiece. Different surface defect forms have different causes. Surface defects have a significant impact on the quality of the workpiece. Therefore, the detection of workpiece surface defects has always been an important step in the workpiece production process. Traditional workpiece surface defect detection is mainly identified by workers' naked eyes. During this period, workpiece surface defect detection had the defects of large workload and high false detection rate. The cost and detection effect could not meet the needs of large-scale industrialized and automated production.

[0003] In order to solve the problem of workpiece surface defects, a workpiece surface defect detection device on the market adopts a design that combines automation and image recognition technology, and has a certain market share.

[0004] With the development of automation and intelligent technology, workpiece surface defect detection technology is becoming more and more mature. Through the joint action of the half-chip machine and the electromagnetic slide, accurate image detection of the workpiece can be performed locally. Although the existing electromagnetic slide can be accurately displaced under the control of the half-chip machine, with the use of the workpiece surface defect detection device, it will also have system errors, making it impossible for the electromagnetic slide to accurately position, affecting the workpiece surface defect detection effect. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that as the workpiece surface defect detection device is used, it itself will also have system errors, making it impossible for the electromagnetic slide rail to be accurately positioned, affecting the workpiece surface defect detection effect.

[0006] In order to solve the above problems, the present invention provides a workpiece surface defect detection device, comprising a conveying device, a plurality of workpieces to be detected are placed on the conveying device, a bracket is fixedly connected to the side wall of the conveying device, and the main body of the bracket is located on the upper side of the conveying device, a cross positioning module is installed on the bracket, and one end of the bracket close to the conveying device is installed, the cross positioning module comprises a transverse electromagnetic slide groove excavated on the bracket, a transverse electromagnetic slider is slidably connected in the transverse electromagnetic slide groove, a positioning pad 1 is fixedly connected to the inner wall of the transverse electromagnetic slide groove, and the positioning pad 1 contacts the transverse electromagnetic slider, the lower end of the transverse electromagnetic slider is fixedly connected to the travel arm, the lower end of the travel arm is excavated with a travel electromagnetic slide groove, a travel electromagnetic slider matching itself is slidably connected in the travel electromagnetic slide groove, and the lower end of the travel electromagnetic slider is fixedly connected to the image recording module;

[0007] A positioning pad 2 is installed in the traveling electromagnetic slide groove, and the positioning pad 2 is located at the lower side of the traveling electromagnetic slider, and the traveling electromagnetic slider is in contact with the positioning pad 2. The positioning pad 2 includes an elastic shell, and the lower inner wall of the elastic shell is fixedly connected to the light-emitting unit, and the upper inner wall of the elastic shell is fixedly connected to a photosensitive unit matching the position of the light-emitting unit, and the light-emitting unit and the photosensitive unit are both made of elastic structure, and the lower inner wall of the elastic shell is fixedly connected to a plurality of shading units, and the ends of the plurality of shading units away from the elastic shell penetrate the light-emitting unit and extend to the upper end of the light-emitting unit, and the shading units are made of opaque elastic material.

[0008] In the above-mentioned workpiece surface defect detection device, the position of the secondary positioning detection image information taken by the image input module is made more accurate, which reduces the system error caused by excessive use times and is not easy to affect the workpiece surface defect detection effect.

[0009] As a further improvement of the present application, a processing terminal is fixedly connected in the bracket, and the processing terminal signal is connected to the cross positioning module and the image recording module. The cross positioning module and the image recording module are also signal-connected. The processing terminal can achieve the effect of controlling the position of the image recording module by controlling the cross positioning module, and the picture information taken by the image recording module will be transmitted back to the processing terminal for image recognition, so as to perform surface defect detection on the workpiece to be inspected.

[0010] As a further improvement of the present application, a slope is carved on the edge of the moving direction of one end of the traveling electromagnetic slider close to the positioning pad 2, and the upper edge of the slope is located on the upper side of the elastic shell, thereby reducing the damping of the traveling electromagnetic slider and the image recording module during the sliding process, making the sliding of the traveling electromagnetic slider and the image recording module smoother and less prone to getting stuck or stuck during the movement.

[0011] As a further improvement and supplement to the present application, the elastic shell is filled with a buffer solution, and the buffer solution is made of a transparent material. Under the premise of not affecting the deformation of the shading unit, the overall elasticity of the positioning pad 2 is increased to the greatest extent, so that the positioning pad 2 can quickly recover its deformation when the external force constraint is lost, and it is not easy for the positioning pad 2 to fail as a whole due to local excessive deformation.

[0012] As a further improvement of the present application, a reinforcing net is embedded in the elastic shell, and the reinforcing net is located on the side of the elastic shell close to the traveling electromagnetic slider, thereby increasing the overall strength of the elastic shell and making it less likely for the elastic shell to be excessively worn due to the friction of the traveling electromagnetic slider, thereby reducing the risk of leakage of the contents of the elastic shell.

[0013] As a further improvement and supplement to the present application, the reinforcing net is made of elastic metal to increase the adaptability of the reinforcing net to deformation and enhance the protective effect of the reinforcing net.

[0014] As another improvement of the present application, an observation groove matching the position of the positioning pad 2 is bored on the side wall of the traveling arm, and a detection pin block is inserted in the observation groove. The detection pin block is made of a transparent material, and an detection groove is bored on the inner wall of one end of the elastic shell close to the detection pin block. The detection pin block includes a transparent shell, and a waste groove is bored on one end of the transparent shell close to the positioning pad 2. The buffer solution is made of a material that is easily solidified in the air. After the positioning pad 2 is frequently squeezed by external force and damaged, it will be torn at the detection groove, and the buffer solution will flow out into the waste groove and gradually solidify to block the tear of the elastic shell to prevent the buffer solution from continuing to leak out. On the other hand, maintenance personnel can regularly observe the detection pin block to determine whether the positioning pad 2 needs to be replaced.

[0015] As another improvement supplement to the present application, the inner wall of the waste groove is chiseled with frosted patterns to increase the structural strength of the buffer solution and the detection pin block after solidification, which facilitates subsequent cleaning work. A finger groove is chiseled at one end of the transparent shell away from the positioning pad 2 to facilitate the insertion and removal of the detection pin block as a whole.

[0016] In summary, in the present scheme, the processing terminal can quickly locate and focus the image entry module by sending positioning information to the cross positioning module to take photos of the corresponding position, and perform secondary positioning detection on the workpiece to be inspected whose defects are not obvious. The workpiece to be inspected that has not found obvious defects after the secondary positioning detection is manually inspected. In the process of secondary positioning of the path electromagnetic slider and the image entry module, the processing terminal can judge the travel position of the path electromagnetic slider and the image entry module by the light intensity received by the photosensitive unit, and then fine-tune the position of the path electromagnetic slider and the image entry module, so that the position of the secondary positioning detection picture information taken by the image entry module is more accurate, reducing the system error caused by too many times of use, and not easily affecting the workpiece surface defect detection effect.

[0017] In addition, by adding a detection pin block to monitor the working status of the positioning pad 2, the positioning pad 2 with excessive wear can be discovered in time, and maintenance work can be arranged to increase the reliability of the components of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a workpiece surface defect detection device according to a first embodiment of the present application;

[0019] Figure 2 A front cross-sectional view of a cross positioning module of a workpiece surface defect detection device according to a first embodiment of the present application;

[0020] Figure 3 This is a schematic structural diagram of a bracket and a cross positioning module of a workpiece surface defect detection device according to a first embodiment of the present application;

[0021] Figure 4 This is a front cross-sectional view of the cross positioning module of the first embodiment of the present application;

[0022] Figure 5 This is a structural schematic diagram of a positioning pad 1 according to a first embodiment of the present application;

[0023] Figure 6 This is a working flow chart of a workpiece surface defect detection device according to a first embodiment of the present application;

[0024] Figure 7 This is a schematic structural diagram of a workpiece surface defect detection system according to a first embodiment of the present application;

[0025] Figure 8 A side cross-sectional view of a cross positioning module according to a second embodiment of the present application;

[0026] Fig. 9 This is a front cross-sectional view of a cross positioning module according to a second embodiment of the present application;

[0027] Fig.10 This is a schematic structural diagram of a detection pin block according to a second embodiment of the present application.

[0028] Description of the numbers in the figure:

[0029] 1 conveying device, 2 workpiece to be detected, 3 bracket, 4 horizontal electromagnetic slide, 5 horizontal electromagnetic slider, 6 path arm, 7 positioning pad one, 8 path electromagnetic slide, 9 path electromagnetic slider, 10 image entry module, 11 positioning pad two, 1101 elastic shell, 1102 light emitting unit, 1103 photosensitive unit, 1104 strengthening net, 12 shading unit, 13 detection pin block, 1301 transparent shell, 1302 waste slot, 1303 finger slot. DETAILED DESCRIPTION

[0030] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0031] The first implementation method:

[0032] Figure 1-5A workpiece surface defect detection device is shown, comprising a conveying device 1, on which a plurality of workpieces 2 to be detected are placed, a bracket 3 is fixedly connected to the side wall of the conveying device 1, and the main body of the bracket 3 is located on the upper side of the conveying device 1, and a cross positioning module is installed on the bracket 3, and the end of the bracket 3 close to the conveying device 1 is installed, and the cross positioning module comprises a transverse electromagnetic slide groove 4 excavated on the bracket 3, a transverse electromagnetic slider 5 is slidably connected in the transverse electromagnetic slide groove 4, a positioning pad 7 is fixedly connected to the inner wall of the transverse electromagnetic slide groove 4, and the positioning pad 7 is in contact with the transverse electromagnetic slider 5, the lower end of the transverse electromagnetic slider 5 is fixedly connected to the travel arm 6, the lower end of the travel arm 6 is excavated with a travel electromagnetic slide groove 8, the travel electromagnetic slide groove 8 is slidably connected with a travel electromagnetic slider 9 matching itself, and the lower end of the travel electromagnetic slider 9 is fixedly connected to an image recording module 10;

[0033] A positioning pad 2 11 is installed in the travel electromagnetic slide 8, and the positioning pad 2 11 is located at the lower side of the travel electromagnetic slider 9, and the travel electromagnetic slider 9 is in contact with the positioning pad 2 11, and the positioning pad 2 11 includes an elastic shell 1101, and the lower inner wall of the elastic shell 1101 is fixedly connected to the light-emitting unit 1102, and the upper inner wall of the elastic shell 1101 is fixedly connected to a photosensitive unit 1103 matching the position of the light-emitting unit 1102, and the light-emitting unit 1102 and the photosensitive unit 1103 are both made of an elastic structure, and the lower inner wall of the elastic shell 1101 is fixedly connected to a plurality of The shading unit 12, one end of the multiple shading units 12 away from the elastic shell 1101 passes through the light-emitting unit 1102 and extends to the upper end of the light-emitting unit 1102. The shading unit 12 is made of an opaque elastic material. When the shading unit 12 is not subjected to external force, the light generated by the light-emitting unit 1102 can pass through the multiple shading units 12 to irradiate the photosensitive unit 1103. Under the pressure of the movement of the electromagnetic slider 9, the local shading unit 12 will be compacted to block the light generated by the light-emitting unit 1102 from irradiating the photosensitive unit 1103.

[0034] In particular, the conveying device 1 in the present solution can be any commonly used transmission structure, including but not limited to belt transmission and roller transmission, etc., and can transport the workpiece 2 to be inspected to the bottom of the image recording module 10 and stop, and the image recording module 10 takes a photo to perform surface defect detection on the workpiece 2 to be inspected. The above-mentioned transmission method and stopping method of the workpiece 2 to be inspected are well-known technologies to those skilled in the art, so they are not disclosed in detail in this application. Those skilled in the art can make reasonable designs based on the existing technology to meet work requirements. In addition, for the convenience of display, the various structures in this application are not drawn strictly in proportion, and those skilled in the art can reasonably design the size and proportion of each structure based on actual conditions and existing technology.

[0035] See also Figure 7A workpiece surface defect detection device includes a processing terminal, which is installed in a bracket 3. The processing terminal is signal-connected to a cross positioning module and an image recording module 10. The cross positioning module and the image recording module 10 are also signal-connected. The processing terminal can control the position of the image recording module 10 by controlling the cross positioning module, and the image information taken by the image recording module 10 will be transmitted back to the processing terminal for image recognition, so as to perform surface defect detection on the workpiece 2 to be inspected.

[0036] See also Figure 6 When the workpiece is inspected for surface defects, the workpiece 2 to be inspected moves to the bottom of the image input module 10. The image input module 10 first takes a picture and transmits the corresponding picture information back to the processing terminal. When the processing terminal does not detect surface defects, the workpiece 2 to be inspected is a good part. When defects are detected on the surface of the workpiece 2 to be inspected, the defects are judged. When the defects are obvious, the workpiece 2 to be inspected is judged to be a waste part. When the defects are not obvious, the processing terminal quickly locates the inconspicuous defects according to the picture information taken by the image input module 10, and locates the inconspicuous defects according to the above positioning. The field cross positioning module performs secondary positioning, and at the same time, the lens of the image input module 10 is zoomed to capture local image information of inconspicuous defects. When the defects are obvious in the image information after the secondary positioning, the workpiece 2 to be inspected is determined to be a scrap piece, and when the defects are not obvious in the image information after the secondary positioning, the above-mentioned workpiece 2 to be inspected is transferred to manual inspection, and manual inspection is performed on the workpiece using other inspection methods. After the inspection of the workpiece 2 to be inspected is completed, the next workpiece 2 to be inspected is started, and at the same time, the electromagnetic slider 9 and the image input module 10 are reset to the initial position.

[0037] In particular, the image recognition technology, information transmission technology, control methods and energy supply methods between various electrical structures of the above-mentioned processing terminal are all well-known technologies to those skilled in the art. Those skilled in the art can make reasonable settings based on the existing technology to meet the usage requirements, and the surface defects of the image entry module 10 include but are not limited to pitting, cracks, bubbles and uneven color.

[0038] In this solution, the processing terminal can quickly locate and focus the image entry module 10 by sending positioning information to the cross positioning module to take a photo of the corresponding position, and perform secondary positioning detection on the workpiece 2 to be inspected whose defects are not obvious. The workpiece 2 to be inspected that has not found obvious defects after the secondary positioning detection is manually inspected. In the process of secondary positioning of the travel electromagnetic slider 9 and the image entry module 10, the processing terminal can judge the travel position of the travel electromagnetic slider 9 and the image entry module 10 by the light intensity received by the photosensitive unit 1103, and then fine-tune the position of the travel electromagnetic slider 9 and the image entry module 10, so that the position of the secondary positioning detection picture information taken by the image entry module 10 is more accurate, reducing the system error caused by too many times of use, and is not easy to affect the workpiece surface defect detection effect.

[0039] The edge of one end of the traveling electromagnetic slider 9 close to the positioning pad 2 11 is chiseled with a slope in its own moving direction, and the upper edge of the slope is located on the upper side of the elastic shell 1101, which reduces the damping of the traveling electromagnetic slider 9 and the image recording module 10 during sliding, making the sliding of the traveling electromagnetic slider 9 and the image recording module 10 smoother and less prone to jamming or jamming during movement. The elastic shell 1101 is filled with a buffer solution, which is made of a transparent material. Under the premise of not affecting the deformation of the shading unit 12, the overall elasticity of the positioning pad 2 11 is increased to the greatest extent, so that the positioning pad 2 11 can quickly recover its deformation when the external force constraint is lost, and it is not easy for the positioning pad 2 11 to fail as a whole due to local excessive deformation.

[0040] A reinforcing net 1104 is embedded in the elastic shell 1101, and the reinforcing net 1104 is located on the side of the elastic shell 1101 close to the traveling electromagnetic slider 9, thereby increasing the overall strength of the elastic shell 1101 and preventing the elastic shell 1101 from being excessively worn due to the friction of the traveling electromagnetic slider 9, thereby reducing the risk of leakage of the contents of the elastic shell 1101. The reinforcing net 1104 is woven from elastic metal, thereby increasing the adaptability of the reinforcing net 1104 to deformation and increasing the protective effect of the reinforcing net 1104.

[0041] In particular, in the present application, the positioning pad 1 7 and the positioning pad 2 11 have exactly the same structure, so the structure of the positioning pad 1 7 will not be described or limited in detail.

[0042] The second implementation method:

[0043] Figure 8-10A workpiece surface defect detection device is shown, an observation groove matching the position of the positioning pad 11 is bored on the side wall of the travel arm 6, a detection pin block 13 is inserted in the observation groove, the detection pin block 13 is made of transparent material, an inner wall of one end of the elastic shell 1101 close to the detection pin block 13 is bored, the detection pin block 13 includes a transparent shell 1301, and an end of the transparent shell 1301 close to the positioning pad 11 is bored with a waste groove 1302, the buffer solution is made of a material that is easy to solidify in the air, after the positioning pad 11 is frequently squeezed by external force and damaged, it will be torn at the detection groove, the buffer solution will flow out, enter the waste groove 1302, and gradually solidify, blocking the tear of the elastic shell 1101, and preventing the buffer solution from continuing to leak out, on the other hand, the maintenance personnel can regularly observe the detection pin block 13 to determine whether the positioning pad 11 needs to be replaced.

[0044] The inner wall of the discard groove 1302 is chiseled with frosted patterns to increase the structural strength of the buffer solution and the detection pin block 13 after solidification, which facilitates subsequent cleaning work. A finger groove 1303 is chiseled at one end of the transparent shell 1301 away from the positioning pad 11 to facilitate the insertion and removal of the detection pin block 13 as a whole.

[0045] Compared with the first embodiment, in this embodiment, the working state of the positioning pad 2 11 is monitored by adding a detection pin block 13, the positioning pad 2 11 with excessive wear is discovered in time, and maintenance work is arranged, thereby increasing the reliability of the components of this application.

[0046] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A workpiece surface defect detection device, characterized in that: The invention comprises a conveying device (1), on which a plurality of workpieces (2) to be inspected are placed, a bracket (3) is fixedly connected to the side wall of the conveying device (1), and the main body of the bracket (3) is located on the upper side of the conveying device (1), and a cross positioning module is installed on the bracket (3) at one end of the bracket (3) close to the conveying device (1), the cross positioning module comprises a transverse electromagnetic slide groove (4) bored on the bracket (3), a transverse electromagnetic slider (5) is slidably connected in the transverse electromagnetic slide groove (4), a positioning pad (7) is fixedly connected to the inner wall of the transverse electromagnetic slide groove (4), and the positioning pad (7) is in contact with the transverse electromagnetic slider (5), the lower end of the transverse electromagnetic slider (5) is fixedly connected to a travel arm (6), the lower end of the travel arm (6) is bored with a travel electromagnetic slide groove (8), a travel electromagnetic slider (9) matching the travel electromagnetic slider (9) is slidably connected in the travel electromagnetic slide groove (8), and the lower end of the travel electromagnetic slider (9) is fixedly connected to an image recording module (10); A second positioning pad (11) is installed in the travel electromagnetic slide groove (8), and the second positioning pad (11) is located at the lower side of the travel electromagnetic slider (9), and the travel electromagnetic slider (9) contacts the second positioning pad (11), and the second positioning pad (11) includes an elastic shell (1101), the lower inner wall of the elastic shell (1101) is fixedly connected to the light-emitting unit (1102), the upper inner wall of the elastic shell (1101) is fixedly connected to a photosensitive unit (1103) matching the position of the light-emitting unit (1102), and the light-emitting unit (1102) and the photosensitive unit (1103) are both made of an elastic structure, and the lower inner wall of the elastic shell (1101) is fixedly connected to a plurality of shading units (12), and one end of the plurality of shading units (12) away from the elastic shell (1101) penetrates the light-emitting unit (1102) and extends to the upper end of the light-emitting unit (1102), and the shading unit (12) is made of an opaque elastic material; The elastic shell (1101) is filled with a buffer solution, which is made of a transparent material. An observation groove matching the position of the second positioning pad (11) is bored on the side wall of the travel arm (6), and a detection pin block (13) is inserted into the observation groove. The detection pin block (13) is made of a transparent material. The inner wall of one end of the elastic shell (1101) close to the detection pin block (13) is bored with a detection groove. The detection pin block (13) comprises a transparent shell (1301). The end of the transparent shell (1301) close to the second positioning pad (11) is bored with a waste groove (1302). The buffer solution is made of a material that is easily solidified in the air. The inner wall of the waste groove (1302) is bored with frosted patterns. The end of the transparent shell (1301) away from the second positioning pad (11) is bored with a finger groove (1303).

2. A workpiece surface defect detection device according to claim 1, characterized in that: A processing terminal is fixedly connected inside the bracket (3), and the processing terminal is signal-connected to a cross positioning module and an image recording module (10), and the cross positioning module and the image recording module (10) are also signal-connected to each other.

3. A workpiece surface defect detection device according to claim 1, characterized in that: The edge of the travel direction of the electromagnetic sliding block (9) at one end close to the second positioning pad (11) is provided with a slope, and the upper edge of the slope is located on the upper side of the elastic housing (1101).

4. A workpiece surface defect detection device according to claim 1, characterized in that: A reinforcing net (1104) is embedded in the elastic shell (1101), and the reinforcing net (1104) is located on a side of the elastic shell (1101) close to the traveling electromagnetic slider (9).

5. A workpiece surface defect detection device according to claim 4, characterized in that: The reinforcing net (1104) is made of elastic metal weaving.

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