Detection device

Abstract

Provided is a detection device arranged at least on the bottom of a workpiece to be processed in the direction of expansion of the workpiece, comprising a plurality of detection units, each detection unit comprising: a gantry base body; a supporting body assembled with the gantry base body; a diffuse reflection laser sensor supported by the supporting body to be arranged close to the workpiece, wherein the plurality of diffuse reflection laser sensors are arranged in the direction of expansion of the workpiece, and the incident light of each diffuse reflection laser sensor is arranged towards a riveting hole on the surface of the workpiece, respectively, and the heights of the plurality of diffuse reflection laser sensors in the vertical direction are the same or different, thereby replacing the existing manual detection mode of the riveting hole, realizing automatic detection, alarm and positioning of misloading and missing holes, and by increasing the movable gantry and the slidably assembled detection units, the detection units can be flexibly adjusted to cope with different specifications of workpieces and different riveting positions.

Description

Technical Field

[0001] This utility model relates to the field of riveting detection technology, specifically to a detection device for detecting the riveting process in the riveting process. Background Technology

[0002] The statements in this section are provided only as background information relating to this disclosure and do not necessarily constitute prior art.

[0003] In the riveting process of large-scale tooling, the tooling is usually placed on a large platform or frame for manual assembly and maintenance. During this process, inspectors must confirm the degree of riveting, for example, by observation and tactile examination, to determine whether the riveting is complete and whether the rivets are in place. For instance, in the riveting process of a DC-DC new energy battery pack (battery casing), the riveting condition of all rivet holes used to fasten the battery pack needs to be carefully checked to ensure that each rivet hole is correctly riveted.

[0004] The number of rivet holes varies on different tooling. When there are many rivet holes, the efficiency of manual inspection is significantly insufficient. Utility Model Content

[0005] In view of this, the present invention provides a detection device that solves at least one of the above problems.

[0006] To solve the above technical problems, the detection device provided by this utility model is arranged at least at the bottom of the workpiece in the unfolding direction. The detection device includes multiple detection units, each of which includes: a frame base; a support body assembled with the frame base; and a diffuse reflection laser sensor supported by the support body and arranged close to the workpiece. The multiple diffuse reflection laser sensors are arranged along the unfolding direction of the workpiece, and the incident light of each diffuse reflection laser is respectively directed toward a riveting hole on the surface of the workpiece. The multiple diffuse reflection laser sensors have the same or different heights in the vertical direction.

[0007] In a preferred embodiment of the present invention, the test bench base is configured to move at the bottom of the workpiece to be processed, and a track portion is arranged on the surface of the test bench base. The test bench base of the detection unit cooperates with the track portion so that the detection unit can move and / or rotate on the test bench base.

[0008] In a preferred embodiment of this utility model, the diffuse reflection laser sensor is arranged toward the rivet hole and is retractable to approach or move away from the rivet hole. The emitting end of the diffuse reflection laser sensor is aligned with the axial direction of the rivet hole so that the incident light of the diffuse reflection laser sensor can pass through the rivet hole axially.

[0009] In a preferred embodiment of this utility model, the diffuse reflection laser sensor is an M5 miniature diffuse reflection laser sensor.

[0010] In a preferred embodiment of this utility model, the multiple diffuse reflection laser sensors are at different heights in the vertical direction, and the diffuse reflection laser sensors at different heights correspond to multiple riveting positions on the surface of the workpiece where there is a height difference.

[0011] In a preferred embodiment of this utility model, an alarm unit is also included. The diffuse reflection laser sensor sends the photosensitive signal to the alarm unit, and the alarm unit sends audible and visual information to provide prompts and warnings regarding the riveting status.

[0012] By implementing the preferred embodiment of this utility model, the following beneficial technical effects are achieved compared with the prior art: it can replace the existing method of manual inspection of rivet holes, realize automatic inspection, and alarm and positioning of misinstalled or missing holes. Furthermore, by adding a movable platform and a sliding assembly inspection unit, it can be flexibly adjusted to meet the inspection applicability of different specifications of processed parts and different riveting positions. Attached Figure Description

[0013] Figure 1 The diagram illustrates the structure of the detection unit in a preferred embodiment of the present invention.

[0014] Figure 2 The diagram illustrates the overall structure of the detection device in a preferred embodiment of this utility model.

[0015] Figure 3 This is a top view, showing the top structure of the workpiece to be processed; Detailed Implementation

[0016] Embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in this specification, the drawings are not drawn to scale, and the same reference numerals denote the same parts.

[0017] It should be noted that the terms "first" and "second" used in the embodiments of this utility model are used to distinguish between two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the utility model. Subsequent embodiments will not explain this in detail.

[0018] Existing manual inspection methods for riveting processes suffer from inefficiency and are relatively subjective in detecting rivet assembly deviations, making it difficult to identify minor discrepancies. To address the low efficiency and accuracy of manual inspection in existing large-scale tooling riveting processes, one known solution involves using robot programming combined with blue light inspection. This solution utilizes a robot equipped with a high-definition camera to perform full-angle inspection of the tooling and to identify and locate missing or incorrectly installed rivet holes. However, this method is extremely costly, and more importantly, the robot's setup cycle is lengthy, making it difficult to adapt to changes when the product as a whole or in parts is modified. Therefore, while this robot-assisted high-definition camera inspection method offers excellent accuracy and efficiency, it is difficult to promote on a general production scale due to the aforementioned limitations.

[0019] In achieving its technical objective, the preferred embodiment of this utility model recognizes that, for a specific object to be processed, the positions of the riveting holes are usually fixed. Therefore, for riveting with fixed hole positions, it should be understood that when the riveting holes are correctly aligned and the rivets are installed in place, the riveting holes should be sealed by the rivets to prevent light from passing through. Utilizing this characteristic, the following settings can be made along the axial direction of the riveting holes:

[0020] A workpiece is placed flat on a processing table, and its surface is used to define a processing position. A light source is placed on one side perpendicular to this position, and a light sensor is placed on the other side. When the rivet is correctly installed, the light from the light source cannot pass through the rivet hole; in other words, the light sensor cannot detect the incident light from the light source, which at least means the rivet is installed inside the rivet hole. It is important to note that the light intensity of the light source is usually set to be sufficiently strong. This configuration is intended so that if the rivet is not installed vertically—that is, if there is a slight angle between the rivet and the rivet hole—a gap will exist between the rivet and the rivet hole, allowing light to pass through. Therefore, when the rivet is in place, sufficiently strong incident light can still partially pass through the gap and be captured by the light sensor.

[0021] While the above-described method can partially achieve the technical objectives of this disclosure, the preferred embodiments of this utility model recognize that the implementation of this method still has the following problems:

[0022] 1) In order for the incident light to pass through the rivet hole, the light source and the photosensitive element are located on opposite sides of the vertical direction of the processing position plane in the architecture based on the above detection strategy. Therefore, during the initial configuration, it is necessary to adjust the relationship between the incident angle of the light source, the axial direction of the rivet hole, and the photosensitive angle of the photosensitive device. Although the position of the rivet hole on a specific workpiece is fixed, the complexity of the initial configuration process will increase significantly when the number of rivet holes increases.

[0023] 2) During the processing, when the workpiece changes, it often means that the position of the rivet hole changes. Adjusting the specific position of the light source and photosensitive element, as well as the corresponding relationship between the aforementioned angles, during the processing is not efficient for inspection and production.

[0024] 3) When solving the aforementioned problem 2 based on existing technology, theoretically, a movable stage for loading light components or a frame for movable mounting of multiple light sources can be configured to overcome the defect of unfavorable position adjustment of light sources and photosensitive components. However, it should be noted that the workpiece to be processed is not always a flat part. It usually includes parts with partial bending or protrusion (e.g., at the edge). Therefore, in the detection architecture based on the above method, it is also necessary to adjust the height of the photosensitive component in the vertical direction according to the specific processing position of the workpiece to be processed.

[0025] In view of the above problems, the preferred embodiment of this utility model further recognizes that when the rivet is correctly installed, it can act as a blocking element for reflected light, so that the light source and the photosensitive element can be set on the same side in the vertical direction of the processing position (e.g., the bottom of the workpiece to be processed). Furthermore, a component that can both act as a light source and receive incident light reflected by the rivet, such as a diffuse reflection laser sensor, can be selected and arranged below the workpiece to be processed.

[0026] Figure 1The diagram illustrates the structure of the detection unit 100 in a preferred embodiment of this invention. As shown, an M5 miniature diffuse reflection laser sensor is selected, and its detection distance can be adjusted within the range of 30 mm to 100 mm. In other words, the incident angle of the M5 miniature diffuse reflection laser sensor can be aligned with the rivet hole, and the specific position of the M5 miniature diffuse reflection laser sensor in the vertical direction can be adjusted closer to or further away from the rivet hole. When a rivet is not installed or is not installed correctly in the rivet hole, the incident light from the diffuse reflection laser sensor can pass through the rivet hole without forming receivable reflected light. At this time, the prompting or warning unit connected to the diffuse reflection laser sensor can provide an early warning for the situation of not installing or not installing correctly. The prompting or warning unit can be one or a combination of known technical means such as a buzzer alarm or a light alarm, or it can introduce an interruption mechanism to pause the feeding of the feeding unit. It should be understood that the design of the prompting or warning unit should preferably be able to remind users that the rivet is installed correctly or incorrectly, and to mark the position of the rivet hole where the rivet is incorrectly installed or not installed.

[0027] Figure 2 This is a schematic diagram illustrating the overall structure of the detection device in a preferred embodiment of the present invention. Figure 3 This is a top view, showing the top structure of the part to be processed. Combined with... Figure 3 See Figure 2 The workpiece 200 has multiple riveting holes 201 along its unfolding direction, and a detection unit 100 is disposed below each riveting hole 201. In different embodiments of this utility model, a frame 300 with a movable base can also be configured to support the detection unit 100 as it moves below the workpiece. Furthermore, the surface of the frame 300 can be provided with a track portion that allows the detection unit 100 to be slidably configured. Thus, while the detection unit 100 moves with the frame 300, it can also be adjusted on the surface of the frame 300 to better align with the riveting holes 201. This configuration facilitates the alignment of the detection unit 100 with the riveting holes 201, and more importantly, it facilitates the replacement of different workpieces during the detection process to address changes in the relative positions of the riveting holes.

[0028] Continue reading Figure 2 and Figure 3The detection unit 100 includes a support body 101. As mentioned above, in different preferred embodiments of this disclosure, the support body 101 can be configured with different structures depending on the style of the stand 300. The support body 101 can also be moved, rotated, and even extend, retract, or slightly bend in the height direction at the bottom of the workpiece 200, as described above, to accommodate height differences on the surfaces to be processed, or in other words, height differences at the riveting positions of the products. While the preferred embodiments of this disclosure do not limit the structure and function of the support body 101, the support body 101 should be configured to both better support the sensor and maintain its stable position and state, and also facilitate the sensor's extension towards the riveting hole.

[0029] Sensor 102 uses an M5 miniature diffuse reflection laser sensor. This sensor serves as a light source and is configured to emit incident light towards the rivet hole. When the rivet hole is correctly fitted with a rivet, the light emitted by the sensor is reflected by the rivet, forming a reflected beam. The sensor senses the reflected beam to determine the rivet installation status. Under different working conditions, depending on the rivet and riveting method, the distance between the sensor and the product to be processed (aligned with the rivet hole) should be appropriate. This is because if the distance is too close, the scattering of the incident light may be captured by the sensor, leading to misjudgment. If the distance is too far, the intensity of the reflected light may be insufficient for the sensor to capture. Therefore, when using different rivets and different riveting methods, both the sensor's ability to capture reflected light and the scattering of the incident light after forming a spot should be considered.

[0030] In actual operation, the detection unit 100 is integrated with the control system and sends the photosensitive signal to the processing unit of the control system. The control system also includes an alarm unit (not shown in the figure) that emits audible and visual signals to indicate that the current riveting process is complete, or to remind users that a rivet in a certain riveting hole is not correctly assembled. Compared with the prior art mentioned above, the detection device of this application can significantly improve the riveting detection efficiency of riveting holes, and compared with the blue light robot solution, it has lower configuration costs and more flexible configuration methods, which is conducive to promotion in small-scale or low-cost production. In particular, it improves detection efficiency by using a single platform to detect workpieces with processing differences in multiple riveting positions.

[0031] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A detection device, wherein the detection device is arranged at least at the bottom of the workpiece in the direction in which the workpiece is unfolded, characterized in that, The detection device includes multiple detection units, each detection unit comprising: Frame base; Support body, which is assembled with the platform base; A diffuse reflection laser sensor is supported by the support body and arranged close to the workpiece. A plurality of the diffuse reflection laser sensors are arranged along the unfolding direction of the workpiece, and the incident light of each diffuse reflection laser is arranged toward a riveting hole on the surface of the workpiece. The plurality of diffuse reflection laser sensors are at the same or different heights in the vertical direction.

2. The detection device according to claim 1, characterized in that, The test bench base is configured to move at the bottom of the workpiece to be processed, and a track portion is arranged on the surface of the test bench base, the test bench base of the detection unit cooperating with the track portion so that the detection unit can move and / or rotate on the test bench base.

3. The detection device according to claim 2, characterized in that, The diffuse reflection laser sensor is arranged toward the rivet hole and is retractable to move closer to or away from the rivet hole. The emitting end of the diffuse reflection laser sensor is aligned with the axial direction of the rivet hole so that the incident light of the diffuse reflection laser sensor can pass through the rivet hole axially.

4. The detection device according to claim 3, characterized in that, The diffuse reflection laser sensor is an M5 miniature diffuse reflection laser sensor.

5. The detection device according to claim 4, characterized in that, The multiple diffuse reflection laser sensors are at different heights in the vertical direction, and the diffuse reflection laser sensors at different heights correspond to multiple riveting positions on the surface of the workpiece where there is a height difference.

6. The detection device according to claim 5, characterized in that, It also includes an alarm unit, to which the diffuse reflection laser sensor sends the photosensitive signal, and the alarm unit sends audible and visual information to provide prompts and warnings about the riveting status.

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