Automobile wire harness welding defect detection device

Abstract

The utility model relates to an automobile wire harness welding defect detection device, which comprises a pressing mechanism, the pressing mechanism comprises a first supporting groove body, a first pressing piece, a second supporting groove body and a second pressing piece, the first supporting groove body is used for supporting an insulating part of a wire harness, the second supporting groove body is used for supporting a terminal of the wire harness, and the second pressing piece is used for pressing the terminal; the first visual assembly and the second visual assembly are located in front of and behind the second supporting groove body correspondingly and used for detecting the front side and the rear side of a wiring harness welding area correspondingly. The third visual assembly is used for detecting the upper side of the wire harness welding area; and the conduction capability detection assembly comprises a third driving piece, a first test conductor and a second test conductor, and the first test conductor and the second test conductor are used for being in conductive contact with two positions of the welding area respectively so as to detect the current conduction capability. A plurality of welding defect detection items of the wire harness can be completed on one detection device, the operation is convenient, and the detection efficiency can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of quality inspection after wire harness welding, and particularly relates to a device for detecting welding defects of an automotive wire harness. Background Art

[0002] A terminal is a commonly used component in new energy vehicles, and one end of a cable is welded to the terminal. Reference can be made to an aluminum wire terminal for new energy vehicles disclosed in Patent CN210040573U, which includes a horizontal plate. A welding area for welding with an aluminum wire is provided on the horizontal plate, and further includes a crimping portion for crimping the insulation layer of the aluminum wire. During welding, the insulation layer at one end of the aluminum wire is stripped off, and each wire core is spread out and welded to the welding area of the horizontal plate. There are certain requirements for welding quality, such as current conduction ability, the distribution of each wire core, the thickness of the wire harness in the welding area, and whether there is a wire core in a loose or unwelded state. In the prior art, mainly technical workers use tools such as vernier calipers for dimension measurement, visually inspect for appearance defects, and also use corresponding instruments to detect the current conduction ability of the wire harness. There are many detection items, so it is time-consuming and laborious. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for detecting welding defects of an automotive wire harness to automatically detect the wire harness after welding.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A device for detecting welding defects of an automotive wire harness includes a pressing mechanism, a first vision component, a second vision component, a third vision component, and a conduction ability detection component. The pressing mechanism includes a first support groove body, a first pressing member, a second support groove body, and a second pressing member. The first support groove body and the second support groove body are fixed on a platform. The first support groove body is used to support the insulating part of the wire harness, and the second support groove body is used to support the terminal of the wire harness. The second support groove body is located to the right of the first support groove body. The first pressing member is located above the first support groove body, and the first pressing member is connected to a first driving member. The first driving member is used to drive the first pressing member to move up and down; the second pressing member is connected to a second driving member. The second driving member is used to drive the second pressing member to move up and down, and the second pressing member is used to press the terminal; the first vision component and the second vision component are respectively located in front of and behind the second support groove body, and are respectively used to detect the front and rear sides of the wire harness welding area; the third vision component is used to detect the upper side of the wire harness welding area;

[0006] The conduction ability detection component includes a third driving member, a first test conductor, and a second test conductor. The first test conductor and the second test conductor are respectively used for electrically contacting two positions of the welding area to detect the current conduction ability. The first test conductor and the second test conductor are fixed to the end of the third driving member through a connecting plate, and the third driving member is used to drive the lifting actions of the first test conductor and the second test conductor.

[0007] Further, the first driving member uses a first air cylinder, the first pressing member is a pressing block, and a pressing groove is provided on the lower side of the pressing block.

[0008] Further, the second pressing member is a pressing frame, the second support groove body passes through the pressing frame, and the second driving member uses a second air cylinder.

[0009] Further, the second air cylinder is arranged inside the platform.

[0010] Further, the first vision component includes a first camera and a first light-shielding plate, and the first light-shielding plate is located behind the first camera; the second vision component includes a second camera and a second light-shielding plate, and the second light-shielding plate is located in front of the second camera. The first light-shielding plate and the second light-shielding plate are respectively driven by a fourth air cylinder and a fifth air cylinder to perform linear motions and are in two working positions of blocking light and not blocking light.

[0011] Further, the third vision component includes a third camera and a first bracket, a sixth air cylinder is provided on the first bracket, the sixth air cylinder is located on the first bracket, and the sixth air cylinder is used to drive the third camera to move in the front-back direction.

[0012] Further, the conduction ability detection component includes a second bracket, a seventh air cylinder is provided on the second bracket, the seventh air cylinder is connected to the third driving member through a transmission plate, the third driving member uses a third air cylinder, and the seventh air cylinder is used to drive the third air cylinder to move in the left-right direction.

[0013] Further, a transparent cover body is provided on the platform to cover the first vision component, the second vision component, and the third vision component.

[0014] Advantages of the present utility model:

[0015] The automobile wire harness welding defect detection device of the utility model comprises a first support groove body, a first pressing member, a second support groove body and a second pressing member. The first support groove body and the first pressing member cooperate to clamp and press the outer insulating part of the wire harness. The second support groove body and the second pressing member are used in cooperation to support and press one end of the terminal. The clamping of the wire harness to be tested is assisted by manual labor. After the clamping is in place, automatic detection can be carried out. The first vision component, the second vision component and the third vision component can be used to take pictures of the front, back and upper sides of the welding section to be tested respectively. The conduction ability detection component can also be used to detect the resistance value of the welding section of the wire harness. Multiple welding defect detection items of the wire harness can be completed on this one detection device, and the operation is convenient, which can significantly improve the detection efficiency. Brief Description of the Drawings

[0016] Figure 1 is a perspective view of an automobile wire harness welding defect detection device of the utility model;

[0017] Figure 2 is Figure 1 partial structure in

[0018] Figure 3 is Figure 3 a view of the structure shown in another angle;

[0019] Figure 4 is Figure 3 a partial structure view in

[0020] Figure 5 is Figure 4 a view of the structure shown in another angle;

[0021] Figure 6 is Figure 5 a partial enlarged view of part A in

[0022] Names corresponding to the marks in the figure: 1 platform; 11, top plate; 2, cover body; 31, first support groove body; 32, first pressing member; 33, first cylinder; 41, first camera; 42, fourth cylinder; 51, first bracket; 52, sixth cylinder; 53, third camera; 61, second bracket; 62, seventh cylinder; 63, transmission plate; 64, third cylinder; 65, connecting plate; 66, first test conductor; 67, second test conductor; 71, second camera; 72, fifth cylinder; 73, second light blocking plate; 81, second support groove body; 82, second pressing member; 83, second cylinder; 91, terminal; 92, welding section. Detailed Description of the Preferred Embodiment

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0024] Embodiments of the present utility model:

[0025] As Figures 1-6 shown, an automobile wire harness welding defect detection device includes a pressing mechanism, a first vision component, a second vision component, a third vision component, and a conduction ability detection component. The pressing mechanism is used to clamp the wire harness to be detected, and the first vision component, the second vision component, and the third vision component perform multi-angle detection. The conduction ability detection component is used to detect the current conduction ability of the welding section 92, that is, there are certain requirements for the resistance size after welding in practice. The structures of each part are introduced below.

[0026] The pressing mechanism includes a first support groove body 31, a first pressing member 32, a second support groove body 81, and a second pressing member 82. The first support groove body 31 and the second support groove body 81 are fixed on the platform. There is also a partition board and a sliding door structure on the upper side of the platform (this part is not an innovation point of the present utility model and is not protected, and this part of the structure can adopt the existing technology). The first support groove body 31 is used to support the insulating part of the wire harness, that is, the protective insulating layer on the outer periphery of the aluminum wire core of the wire harness; as Figure 6 shown, the second support groove body 81 is used to support the terminal 91 of the wire harness. The terminal 91 is welded to the aluminum wire core, and the welding section 92 is what the present utility model detects. The second support groove body 81 is located to the right of the first support groove body 31. The first pressing member 32 is located above the first support groove body 31. The first pressing member 32 is connected to a first driving member, and the first driving member is used to drive the first pressing member 32 to move up and down; the first driving member adopts a first cylinder 33. The first pressing member 32 is a pressing block, and a pressing groove is provided on the lower side of the pressing block, which cooperates with the first support groove body 31 to clamp the wire harness therein.

[0027] The second pressing member 82 is connected to a second driving member, and the second driving member is used to drive the second pressing member 82 to move up and down. The second pressing member 82 is used to press the terminal 91; the second pressing member 82 is a pressing frame, and the second support groove body 81 passes through the pressing frame. The second driving member adopts a second cylinder 83. The second cylinder 83 is arranged inside the platform, that is, in the area below the second support groove body 81, as Figure 2Below the top plate 11 of the middle platform 1. The second cylinder 83 drives the pressing frame to move up and down. Using the upper side wall of the inner hole of the pressing frame as the pressing surface, the other end of the terminal 91, that is, the non-welding area (flat structure), is pressed. The first and second pressing members are used to fix the position of the wire harness to be measured, so as to facilitate taking pictures by the vision component. Each wire of the aluminum wire core is located above the terminal 91, and the placement of the wire harness is assisted by manual labor.

[0028] The first vision component and the second vision component are respectively located in front of and behind the second support groove body 81, and are respectively used to detect the front and rear sides of the wire harness welding area to detect whether there is a wire in an unwelded state and the thickness of the welding section 92. The third vision component is used to detect the upper side of the wire harness welding area. After taking pictures, it is used to detect the distribution of the aluminum wire core in the width direction of the terminal 91, the length of the welding section 92, and whether there are defects on the welding surface.

[0029] The first vision component includes a first camera 41 and a first light shield. The first light shield is located behind the first camera 41; the second vision component includes a second camera 71 and a second light shield 73. The second light shield is located in front of the second camera 71. The first light shield and the second light shield 73 are respectively driven by a fourth cylinder 42 and a fifth cylinder 72 to perform linear motions, and are in two working positions of blocking light and not blocking light. The first and second light shields have the same structure. Both the first light shield and the second light shield 73 move in the left-right direction. When the first camera 41 takes pictures, the first light shield is retracted and does not block light, while the second light shield 73 is in the light-blocking working position; when the second camera 71 takes pictures, the second light shield 73 is retracted and does not block light, while the first light shield is in the light-blocking working position; to avoid mutual influence between the two cameras, images can be taken at intervals.

[0030] Figure 2 As shown, the third vision component includes a third camera 53 and a first bracket 51. A sixth cylinder 52 is provided on the first bracket 51. The sixth cylinder 52 is located on the first bracket 51, and the sixth cylinder 52 is used to drive the third camera 53 to move in the front-rear direction. The third camera 53 and the supporting light source are fixed on a support frame, and the support frame is connected to the driving end of the sixth cylinder 52. The third camera 53 is designed to be movable in order to make way for each other with the conduction ability detection component to be introduced below and avoid interference, because both of them are to be located above the area to be measured. The cameras used in this embodiment are all existing vision cameras.

[0031] Figure 1As shown, a transparent cover 2 is provided on the platform, covering the first vision component, the second vision component and the third vision component. The transparent cover 2 is made of acrylic board, which does not affect the imaging of the above cameras, especially when the cameras are equipped with light sources; by using the transparent cover, during the detection process, the influence of camera exposure on the outside world is prevented, especially when the operator is watching. In addition, when conducting the conductivity detection, it also prevents the operator from touching.

[0032] Figure 5 and 6 As shown, the conduction ability detection component includes a third driving member, a first test conductor 66, and a second test conductor 67. The first test conductor 66 and the second test conductor 67 are respectively used for electrically contacting two positions of the welding area, that is, the welding section, to detect the current conduction ability. The first test conductor 66 and the second test conductor 67 are fixed to the end of the third driving member through a connecting plate 65. The third driving member uses a third air cylinder 64, and the third air cylinder 64 is used to drive the lifting movement of the first test conductor 66 and the second test conductor 67. The conduction ability detection component includes a second bracket 61. A seventh air cylinder 62 is provided on the second bracket 61. The seventh air cylinder 62 is connected to the third driving member through a transmission plate 63, and the seventh air cylinder 62 is used to drive the third air cylinder 64 to move in the left-right direction. When conducting the conduction ability detection, the third camera 53 has retreated to the rear to make way; the seventh air cylinder 62 acts to drive the entire third air cylinder 64 to move towards the side of the wire harness to be tested. After arriving, then the third air cylinder 64 acts to lower the first test conductor 66 and the second test conductor 67 to the detection point. The first test conductor 66 and the second test conductor 67 are both in electrical contact with the welding section 92 to be tested, which is equivalent to the resistance between two points, and the measurement can be completed by an existing measuring instrument. After the measurement is completed, the third air cylinder 64 drives the test conductor to rise to a certain height, and then the seventh air cylinder 62 acts to move it to the right, that is, away from the detection area.

[0033] In the above embodiments, each driving member uses an air cylinder, which is convenient for control; unifying to air cylinders is also convenient for designing the entire power control system and reducing the manufacturing cost. In other embodiments, some air cylinders can also be replaced with other existing linear driving mechanisms. For example, the seventh air cylinder can be replaced with a linear module, which can be a lead screw type or a synchronous belt type, and is driven by a servo motor.

Claims

1. An automobile wiring harness welding defect detection device, characterized in that: It includes a pressing mechanism, a first vision component, a second vision component, a third vision component and a conduction ability detection component. The pressing mechanism includes a first support groove body, a first pressing member, a second support groove body, and a second pressing member. The first support groove body and the second support groove body are fixed on the platform. The first support groove body is used to support the insulating part of the wire harness, and the second support groove body is used to support the terminals of the wire harness. The second support groove body is located to the right of the first support groove body. The first pressing member is located above the first support groove body. The first pressing member is connected to a first driving member, and the first driving member is used to drive the first pressing member to move up and down. The second pressing member is connected to a second driving member, and the second driving member is used to drive the second pressing member to move up and down. The second pressing member is used to press the terminals. The first vision component and the second vision component are respectively located in front of and behind the second support groove body, and are respectively used to detect the front and rear sides of the wire harness welding area. The third vision component is used to detect the upper side of the wire harness welding area. The conduction ability detection component includes a third driving member, a first test conductor, and a second test conductor. The first test conductor and the second test conductor are respectively used to conductively contact two positions of the welding area to detect the current conduction ability. The first test conductor and the second test conductor are fixed to the end of the third driving member through a connecting plate. The third driving member is used to drive the lifting actions of the first test conductor and the second test conductor.

2. The automotive wiring harness welding defect detection device according to claim 1, characterized in that: The first driving member uses a first air cylinder, and the first pressing member is a pressing block. A pressing groove is provided on the lower side of the pressing block.

3. The automotive wiring harness welding defect detection device according to claim 1, wherein: The second pressing member is a pressing frame. The second support groove body passes through the pressing frame. The second driving member uses a second air cylinder.

4. The automotive wiring harness welding defect detection device according to claim 3, wherein: The second air cylinder is arranged inside the platform.

5. The automotive wiring harness welding defect detection device according to claim 1, characterized in that: The first vision component includes a first camera and a first light-shielding plate. The first light-shielding plate is located behind the first camera. The second vision component includes a second camera and a second light-shielding plate. The second light-shielding plate is located in front of the second camera. The first light-shielding plate and the second light-shielding plate are respectively driven by a fourth air cylinder and a fifth air cylinder to perform linear movements, and are in two working positions of light-shielding and non-light-shielding.

6. The automotive wiring harness welding defect detection device according to claim 5, wherein: The third vision component includes a third camera and a first bracket. A sixth air cylinder is provided on the first bracket. The sixth air cylinder is located on the first bracket, and the sixth air cylinder is used to drive the third camera to move in the front-rear direction.

7. The automotive wire harness welding defect detection device according to claim 6, characterized in that: The conduction ability detection component includes a second bracket. A seventh air cylinder is provided on the second bracket. The seventh air cylinder is connected to the third driving member through a transmission plate. The third driving member uses a third air cylinder. The seventh air cylinder is used to drive the third air cylinder to move in the left-right direction.

8. The automotive wire harness welding defect detection device according to any one of claims 1 to 7, characterized in that: A transparent cover body is provided on the platform to cover the first vision component, the second vision component and the third vision component.

Images