Quality detection device and method for stamping part

Abstract

The present specification provides a quality detection device and method for a stamped part, the quality detection device being provided in a processing die of the stamped part, the quality detection device comprising: a laser sensor configured to emit laser to measure the sideline size of the stamped part and generate sideline distance data; the controller is connected with the laser sensor and is configured to acquire the multiple pieces of sideline distance data generated by the laser sensor; the stamping part comprises a target stamping part, and the controller is configured to determine the sideline size of the target stamping part according to the sideline distance data of the target stamping part; and according to the sideline size of the target stamping part, whether the target stamping part possibly has quality problems in the drawing process and the process after the drawing process or not is predicted. The process for installing the laser sensor is simple, and the cost is low, so that the laser sensor is used for detecting the quality of the stamping part, and the detection cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of stamping processes, and particularly to a quality inspection device and method for stamping parts. Background Art

[0002] During the forming process of stamping parts, processes such as blanking, drawing, trimming, punching, and shaping are involved. Any problem in any of these processes will have a great impact on the forming effect of the stamping parts. Therefore, it is necessary to perform quality inspection on the stamping parts during the forming process. In the prior art, when performing quality inspection on stamping parts, an image of the part after drawing is captured by a camera and compared with a standard image to obtain the material inflow of the stamping part. Then, based on the material inflow of the stamping part, it is detected whether the stamping part may have quality problems. However, this method of quality inspection for stamping parts has extremely high requirements for the installation process of the camera and relatively high costs. Summary of the Invention

[0003] This application provides a quality inspection device and method for stamping parts, which can reduce the cost of quality inspection for stamping parts.

[0004] According to the first aspect of the embodiments of this specification, a quality inspection device for stamping parts is provided. The quality inspection device is disposed on a processing die for manufacturing the stamping parts. The quality inspection device includes: a measurement motion assembly, including a first position and a second position, capable of moving between the first position and the second position. When the stamping part is located in the die, the measurement motion assembly is located at the first position. When the stamping part is not located in the die, the measurement motion assembly is located at the second position; a position sensor, configured to generate a trigger signal when the measurement motion assembly is located at the first position; a laser sensor, connected to the position sensor, configured to emit a laser in response to the trigger signal to measure the edge dimension of the stamping part and generate edge distance data; a controller, connected to the laser sensor, configured to obtain the edge distance data generated by the laser sensor; the stamping part includes a target stamping part, and the controller is configured to determine the edge dimension of the target stamping part according to the edge distance data of the target stamping part; and predict whether the target stamping part may have quality problems in the drawing process and the processes after the drawing process according to the edge dimension of the target stamping part.

[0005] Optionally, the process for processing the stamping part includes a drawing process as the first process and a second process after the drawing process. The processing die includes a die for the second process, and the quality inspection device is disposed on the die for the second process.

[0006] Optionally, the controller is configured to: predict that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the side dimension of the target stamping part exceeds the set range.

[0007] Optionally, the stamping part includes historical stamping parts processed before the target stamping part, and the controller is configured to: determine the fluctuation trend of the side dimension of the target stamping part based on the side dimensions of multiple historical stamping parts and the target stamping part as the forming trend of the target stamping part; predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the forming trend of the target stamping part.

[0008] Optionally, the controller is configured to: determine the fluctuation trend of the side dimensions of the historical stamping parts based on the side dimensions of multiple historical stamping parts; predict that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the forming trend of the target stamping part deviates from the fluctuation trend of the side dimensions of the historical stamping parts.

[0009] Optionally, the controller is configured to: determine the reference range of the side dimension fluctuation as the fluctuation trend of the side dimensions of the historical stamping parts based on the side dimensions of multiple historical stamping parts.

[0010] Optionally, the controller is configured to:

[0011] Determine the performance index of the stamping part according to the side dimensions of every preset number of historical stamping parts; generate a signal indicating abnormal stability of the processing die when the performance index is not equal to the standard threshold.

[0012] In a second aspect of the embodiments of this specification, a quality inspection method for stamping parts is provided. The quality inspection method is applied to the above quality inspection device, and the quality inspection method includes: obtaining the side distance data generated by the laser sensor; determining the side dimension of the target stamping part according to the side distance data of the target stamping part; predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the side dimension of the target stamping part.

[0013] Optionally, predicting whether there may be quality problems with the stamping part according to the side dimension of the stamping part includes: predicting that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the side dimension of the target stamping part exceeds the set range.

[0014] Optionally, determining whether there may be a problem with the quality of the stamping part according to the edge line dimension of the stamping part includes: determining the fluctuation trend of the edge line dimension of the target stamping part as the forming trend of the target stamping part according to the edge line dimensions of a plurality of the historical stamping parts and the target stamping part; predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the forming trend of the target stamping part.

[0015] The technical solutions provided by the embodiments of this specification may include the following beneficial effects:

[0016] A laser sensor and a controller are provided in the quality inspection device for stamping parts. The laser sensor generates data on the edge distance for detecting the stamping part, and the controller outputs the edge line dimension of the stamping part according to the edge distance data of the stamping part, and then predicts whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge line dimension of the stamping part. Since the installation process of the laser sensor is simple and the cost is low, the quality inspection of the stamping part by the laser sensor reduces the inspection cost.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. Description of the Drawings

[0018] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0019] Figure 1 is a three-dimensional schematic diagram of an embodiment of the quality inspection device for stamping parts of the present application;

[0020] Figure 2 is a flowchart of an embodiment of the quality inspection method executed by the controller in the quality inspection device for stamping parts of the present application;

[0021] Figure 3 is a schematic diagram of the edge line dimension fluctuation trend of the stamping parts of the present application. Detailed Description of the Embodiment

[0022] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this specification. On the contrary, they are only examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0023] The terms used in this specification are for the purpose of describing particular embodiments only and are not intended to limit this specification. The singular forms "a", "the", and "said" used in this specification and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this specification, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "upon" or "in response to determining".

[0025] Next, the embodiments of this specification will be described in detail.

[0026] Figure 1 is a three-dimensional schematic diagram of an embodiment of the quality inspection device 1 for stamping parts.

[0027] As Figure 1As shown in the figure, the quality inspection device 1 of the stamping part is installed on the processing die of the stamping part. The quality inspection device 1 of the stamping part includes: a measurement motion component 11, a position sensor 12, a laser sensor 13, a controller 14, a charging port 15, a display screen 16 and a housing 17. Among them, the measurement motion component 11 includes a first position 19 and a second position 18, and can move between the first position 19 and the second position 18. When the stamping part is located in the processing die, the measurement motion component 11 is located at the first position 19. When the stamping part is not located in the processing die, the measurement motion component 11 is located at the second position 18. When the stamping part just touches the processing die, it will touch the left end face of the measurement motion component 11. At this time, the right end face of the measurement motion component 11 is at the second position 18. After the stamping part is placed in the processing die, it will squeeze the left end face of the measurement motion component 11 to move, and then make the right end face of the measurement motion component 11 swing with the force on the left end face. At this time, the right end face of the measurement motion component 11 is at the first position 19. The position sensor 12 is configured to generate a trigger signal when the measurement motion component 11 is located at the first position 19. The laser sensor 13 is located inside the housing 17 of the quality inspection device 1, is connected to the position sensor 12, and the laser sensor 13 is configured to emit laser in response to the trigger signal to measure the edge dimension of the stamping part and generate edge distance data. The controller 14 is connected to the laser sensor 13 and is configured to obtain the edge distance data generated by the laser sensor 13. The stamping part includes a target stamping part. The controller 14 is configured to determine the edge dimension of the target stamping part according to the edge distance data of the target stamping part; and predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge dimension of the target stamping part. The charging port 15 is used to provide an inlet for receiving power for the quality inspection device 1. The display screen 16 is configured to display the edge dimension of the stamping part. Among them, the target stamping part is the stamping part in the processing state, and the edge distance data of the target stamping part is the data generated by the laser sensor 13 for calculating the edge dimension of the target stamping part.

[0028] Optionally, the connection methods in the above-mentioned connection between the controller 14 and the laser sensor 13 and the connection between the laser sensor 13 and the position sensor 12 include electrical connection.

[0029] Optionally, the processes for processing the stamping part include a drawing process as the first process and a second process after the drawing process. The processing die includes a die for the second process, and the quality inspection device is installed on the die for the second process.

[0030] Installing the quality inspection device on the die of the process after the drawing process can directly detect the drawing effect of the stamping part after the drawing process and improve the efficiency of quality inspection of the stamping part.

[0031] Optionally, the above-mentioned controller 14 can be an integrated chip or other devices for implementing the embodiments of the present application.

[0032] Exemplarily, when the stamping part contacts the measurement motion assembly 11 when it is located in the above-mentioned processing die and pushes the measurement motion assembly 11 to move between the first position and the second position. When the measurement motion assembly 11 contacts the in-place sensor 12 during the movement, the in-place sensor 12 will send a trigger signal to the laser sensor 13. After receiving the trigger signal, the laser sensor 13 emits laser in response to the trigger signal. The emitted laser returns when it contacts the measurement motion assembly 11, and the distance between the laser sensor 13 and the measurement motion assembly 11 can be obtained according to the time difference between the emission and return of the laser. Since the measurement motion assembly 11 moves between the first position and the second position, the laser sensor 13 will obtain multiple distances from the measurement motion assembly 11 at different positions, and the obtained multiple distances are used as the edge distance data of the stamping part. The controller 14 predicts whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge distance data.

[0033] A laser sensor 13 and a controller 14 are arranged in the quality inspection device 1 of the stamping part. The laser sensor 13 detects the edge distance data of the stamping part, and the controller 14 determines the edge size of the stamping part according to the edge distance data of the stamping part, and then predicts whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge size of the stamping part. Since the installation process of the laser sensor 13 is simple and the cost is low, the quality inspection of the stamping part by the laser sensor 13 can reduce the inspection cost.

[0034] As Figure 2 shown, the above-mentioned controller is configured according to the following process:

[0035] Step 201, obtain the edge distance data generated by the laser sensor.

[0036] Step 202, determine the edge size of the target stamping part according to the edge distance data of the target stamping part.

[0037] Perform data optimization on the multiple edge distance data of the target stamping part to obtain the edge size of the target stamping part. Among them, data optimization refers to performing data processing on the multiple edge distance data of the target stamping part, that is, removing the minimum value and the maximum value from the multiple edge distance data of the target stamping part, calculating the average value of the remaining data and using it as the edge size of the target stamping part.

[0038] Step 203, predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge size of the target stamping part.

[0039] Optionally, when the edge dimension of the target stamping part exceeds the set range, it is predicted that there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part.

[0040] Optionally, the stamping part includes historical stamping parts that have been processed before the target stamping part. According to the edge dimensions of multiple historical stamping parts and the target stamping part, determine the fluctuation trend of the edge dimension of the target stamping part as the forming trend of the target stamping part. According to the forming trend of the target stamping part, predict whether there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part.

[0041] Optionally, predicting whether there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part according to the forming trend of the target stamping part includes:

[0042] According to the edge dimension data of multiple historical stamping parts, determine the fluctuation trend of the edge dimensions of the historical stamping parts.

[0043] When the forming trend of the target stamping part deviates from the fluctuation trend of the edge dimensions of the historical stamping parts, it is predicted that there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part.

[0044] That is, select multiple edge dimension data from the edge dimensions of the historical stamping parts. According to the multiple edge dimension data of the historical stamping parts, determine the fluctuation trend of the edge dimensions of the historical stamping parts. Then, according to the edge dimensions of the historical stamping parts and the edge dimensions of the target stamping part, determine the fluctuation trend of the edge dimensions of the target stamping part. If the fluctuation trend of the edge dimensions of the target stamping part deviates from the fluctuation trend of the edge dimensions of the historical stamping parts, it is predicted that there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part.

[0045] Exemplarily, according to the edge dimensions of multiple historical stamping parts, calculate the normal distribution law of the historical stamping parts and use it as the fluctuation trend of the edge dimensions of the historical stamping parts. Select the edge dimensions of multiple historical stamping parts that are close to the production time of the target stamping part and calculate their normal distribution law with the edge dimensions of the target stamping part as the fluctuation trend of the edge dimensions of the target stamping part. Compare the fluctuation trend of the edge dimensions of the target stamping part with the fluctuation trend of the edge dimensions of the historical stamping parts. If the fluctuation trend of the edge dimensions of the target stamping part does not conform to the fluctuation trend of the edge dimensions of the historical stamping parts, it is predicted that there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part.

[0046] Optionally, the method for determining the fluctuation trend of the edge dimensions of the historical stamping parts:

[0047] Based on the edge line dimensions of multiple historical stamping parts, determine the reference range of the edge line dimension fluctuations, which serves as the fluctuation trend of the edge line dimensions of the historical stamping parts. Among them, the reference range of the edge line dimension fluctuations is the range within which the edge line dimensions of the stamping parts meet the forming standards fluctuate.

[0048] Furthermore, adopt SPC (Statics Process Control), and based on the edge line dimensions of multiple historical stamping parts, determine the upper control line, lower control line, and central reference line in SPC. According to the upper control line, lower control line, and central reference line in SPC, determine the reference range of the edge line dimension fluctuations. Select the edge line dimensions of multiple historical stamping parts that are close to the production time of the target stamping part. Based on the edge line dimensions of the selected multiple historical stamping parts and the edge line dimensions of the target stamping part, determine the fluctuation trend of the edge line dimensions of the target stamping part in SPC, which serves as the forming trend of the target stamping part. Compare the forming trend of the target stamping part with the reference range of the edge line dimension fluctuations. If it exceeds the reference range of the edge line dimension fluctuations, it is predicted that there may be quality problems in the drawing process and subsequent processes of the target stamping part. When it is predicted that there may be quality problems with the target stamping part, the quality detection device will issue a warning signal to remind the staff that adjustments need to be made to the production factors.

[0049] Exemplarily, as Figure 3 shown, use SPC to compare the fluctuation trend of the edge line dimensions of the target stamping part and the fluctuation trend of the edge line dimensions of the historical stamping parts. Figure 3 In which the abscissa represents the number of stamping parts, and the ordinate represents the edge line dimensions of the stamping parts. From Figure 3 it can be seen the fluctuation trend of the edge line dimensions of the target stamping part and the central reference line determined by the edge line dimensions of multiple historical stamping parts.

[0050] By the fluctuation trend of the stamping parts, the quality of the stamping parts can be monitored in real time, and it is possible to more accurately predict whether there may be quality problems in the drawing process and subsequent processes of the target stamping part.

[0051] Optionally, the controller is configured to:

[0052] Based on the edge line dimensions of every preset number of historical stamping parts, determine the performance index of the stamping parts. In the case where the performance index is not equal to the standard threshold, generate a signal indicating abnormal stability of the processing die. Among them, the performance index is the index data for detecting the stability of the stamping part production process, and the standard threshold represents the signal value for stable stamping part production process.

[0053] Exemplarily, the performance index of the stamping part is calculated every preset number of historical stamping part edge dimensions. When the performance index is not equal to the standard threshold value, that is, not equal to the signal value indicating the stable production process of the stamping part, the controller will generate a signal indicating the abnormal stability of the processing die, indicating that the production process of the stamping part is unstable at this time, and adjustments need to be made to production factors such as the processing die.

[0054] By calculating the performance index, the stability of the stamping part production process is detected. While detecting the quality problems of the stamping parts, the production process of the stamping parts is also concerned. When the production process of the stamping part is unstable, an early warning can be given in time to remind that adjustments need to be made to the production factors. In this way, the production of stamping parts with unqualified quality is reduced, and unnecessary product losses are lowered.

[0055] This specification also provides a quality inspection method for stamping parts. The quality inspection method is applied to the above-mentioned quality inspection device. The quality inspection method includes: obtaining the edge distance data generated by the above-mentioned laser sensor; determining the edge dimensions of the target stamping part according to the edge distance data of the target stamping part; predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge dimensions of the target stamping part.

[0056] Optionally, predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge dimensions of the target stamping part includes:

[0057] In the case where the edge dimensions of the target stamping part exceed the set range, it is predicted that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process.

[0058] Optionally, predicting whether there are quality problems with the stamping part according to the edge dimensions of the stamping part includes:

[0059] Determine the fluctuation trend of the edge dimensions of the target stamping part based on the edge dimensions of multiple historical stamping parts and the target stamping part, and use it as the forming trend of the target stamping part.

[0060] Predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the forming trend of the target stamping part.

[0061] Since the technical features of the quality inspection method for stamping parts correspond to the technical features of the above-mentioned quality inspection device for stamping parts, these same technical features will not be elaborated here.

[0062] By obtaining the edge distance data of the stamping part detected by the laser sensor, the edge dimension of the target stamping part is determined. According to the determined edge dimension of the target stamping part, it is possible to anticipate in advance whether there may be quality problems in the drawing process and the processes after the drawing process of the target stamping part, avoiding the production of a large number of stamping parts with unqualified quality, reducing the situation of production line stoppage and rework of stamping parts, and reducing the product scrap cost.

[0063] The specific embodiments of the present specification have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0064] Those skilled in the art will readily conceive of other embodiments of the present specification after considering the specification and practicing the invention herein. The present specification is intended to cover any variations, uses, or adaptations of the present specification, which follow the general principles of the present specification and include common general knowledge or conventional technical means in the technical field not claimed in the present application. The specification and embodiments are only to be considered as exemplary, and the true scope and spirit of the present specification are pointed out by the following claims.

[0065] It should be understood that the present specification is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present specification is only limited by the appended claims.

[0066] The above are only the preferred embodiments of the present specification and are not intended to limit the present specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present specification shall be included within the scope of protection of the present specification.

Claims

1. A quality inspection device for stamping parts, characterized in that The quality inspection device is provided in the processing die of the stamping part, and the quality inspection device includes: A measurement motion component, including a first position and a second position, capable of moving between the first position and the second position. When the stamping part is located in the die, the measurement motion component is located at the first position. When the stamping part is not located in the die, the measurement motion component is located at the second position; A position sensor, configured to generate a trigger signal when the measurement motion component is located at the first position; A laser sensor, connected to the position sensor, configured to emit laser in response to the trigger signal to measure the edge dimension of the stamping part and generate edge distance data; and A controller, connected to the laser sensor, configured to obtain the edge distance data generated by the laser sensor. The stamping part includes a target stamping part, and the controller is configured to determine the edge dimension of the target stamping part according to the edge distance data of the target stamping part; and predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge dimension of the target stamping part.

2. The quality inspection device according to claim 1, characterized in that The processes for processing the stamping part include a drawing process as the first process and a second process after the drawing process. The processing die includes a die for the second process, and the quality inspection device is provided in the die for the second process.

3. The quality inspection device according to claim 1, characterized in that, The controller is configured to: Predict that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the edge dimension of the target stamping part exceeds the set range.

4. The quality inspection device according to claim 1, characterized in that, The stamping part includes historical stamping parts processed before the target stamping part, and the controller is configured to: Determine the fluctuation trend of the edge dimension of the target stamping part according to the edge dimensions of multiple historical stamping parts and the target stamping part as the forming trend of the target stamping part; Predict whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the forming trend of the target stamping part.

5. The quality inspection device according to claim 4, characterized in that, The controller is configured to: Determine the fluctuation trend of the edge dimensions of the historical stamping parts according to the edge dimensions of multiple historical stamping parts; Predict that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the forming trend of the target stamping part deviates from the fluctuation trend of the edge dimensions of the historical stamping parts.

6. The quality inspection device according to claim 5, wherein The controller is configured to: Determine a reference range of the edge dimension fluctuation as the fluctuation trend of the edge dimensions of the historical stamping parts according to the edge dimensions of multiple historical stamping parts.

7. The quality inspection device according to claim 4, characterized in that, The controller is configured to: Determine the performance index of the stamping part according to the edge dimensions of every preset number of historical stamping parts; Generate a signal indicating abnormal stability of the processing die when the performance index is not equal to the standard threshold.

8. A quality inspection method for stamping parts, characterized in that, The stamping part includes a target stamping part, and the quality inspection method is applied to the quality inspection device according to any one of claims 1 to 7. The quality inspection method includes: Obtaining the edge distance data generated by the laser sensor; Determining the edge size of the target stamping part according to the edge distance data of the target stamping part; Predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge size of the target stamping part.

9. The quality inspection method according to claim 8, characterized in that, The predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the edge size of the stamping part includes: Predicting that there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process when the edge size of the target stamping part exceeds the set range.

10. The quality inspection method according to claim 8, characterized in that, The predicting whether there may be quality problems with the stamping part according to the edge size of the stamping part includes: Determining the fluctuation trend of the edge size of the target stamping part as the forming trend of the target stamping part according to the edge sizes of a plurality of the historical stamping parts and the target stamping part; Predicting whether there may be quality problems with the target stamping part in the drawing process and the processes after the drawing process according to the forming trend of the target stamping part.

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