Method and system for detecting distance from welding spot center to R angle

Abstract

The invention provides a method and a system for detecting a distance from a welding spot center to an R angle. The method comprises the following steps: detecting a part having an interference relationship with a to-be-detected welding spot file; making a vertical line of a connecting part by taking the welding spot as a reference and a midpoint; making a cylinder to divide the outer surface of the connecting part; the dividing face is disassembled; processing each disassembled curved surface to obtain a curved surface boundary intersection line of each curved surface intersected with the cylinder; taking the welding spot as a reference, and respectively making a vertical plane from the welding spot to a curved surface boundary intersection line of each curved surface; taking a midpoint and two end points of a'curved surface-vertical surface 'intersecting line, and drawing a circle by three points; if the radius of the circle is larger than a configuration threshold value, the curved surface is a welding surface, and distance detection is qualified; if not, determining that the curved surface is a chamfered surface, and determining that the distance detection is unqualified. According to the invention, the detection logic is simplified, the distance detection from the welding spot to the R angle and the flanging is automatically realized, the detection is faster and more accurate, the risk is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of automobile automation design, and in particular relates to a method and a system for detecting the distance from a welding spot center to an R angle. Background Art

[0002] At present, in the field of automobile design, due to the existence of chamfers and flanges, in the production process of the body-in-white assembly, according to the design specifications and production process requirements, sufficient space must be left from the center of the weld to the R angle and flange features of the parts. This is to prevent interference with the welding equipment during the production process and to leave operating space for the welding equipment. Therefore, it is necessary to detect the distance from the weld to the R angle and flange to determine whether the spatial distance of the weld meets the requirements.

[0003] When checking the distance from the weld to the R angle and flange, the designer needs to observe whether there is a chamfer around the weld, and perform distance detection on welds with chamfers or flange features around them. In order to improve the strength of parts in the body-in-white, chamfer features are often made at the welding position. For welds with spacing that meet the requirements, statistics can be omitted, but welds that do not meet the requirements must be counted for subsequent modifications.

[0004] Manual detection of the distance from the welding point to the R corner and the flange has the risk of missed detection and wrong detection; the operation is large and cumbersome, and the work efficiency is low. Summary of the invention

[0005] The present invention proposes a method and system for detecting the distance from the center of a solder joint to an R corner, which simplifies the detection logic and automatically realizes the distance detection from the solder joint to the R corner and the flange, making the detection faster and more accurate, reducing risks and improving efficiency.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows: A method for detecting the distance from the center of a solder joint to an R angle, comprising: S1. Obtain all parts under the parent level of the solder joint file to be detected; detect parts that have an interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; S2. Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connecting parts and retains the inner part of the circle as the dividing surface; S3, disassemble the split surface; if only one curved surface is left after disassembly, the distance from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled curved surface to obtain the curved boundary intersection line of each curved surface intersecting with the cylinder; S4. Taking the soldering point as the reference, find the boundary line of each curved surface closest to the soldering point, and make the median perpendicular plane of the boundary line; if the boundary line closest to the soldering point is the endpoint, make the median perpendicular planes of the two boundary lines with the common endpoints respectively; intersect the curved surface with the median perpendicular plane to obtain the "curved surface-perpendicular plane" intersection line; take the midpoint and two endpoints of the "curved surface-perpendicular plane" intersection line, and draw a circle with the three points; S5. Measure the radius of the circle. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified.

[0007] Furthermore, it also includes: S6. If the welding point is located on the intersection line of the two curved surfaces, the two curved surfaces are detected according to the logic of steps S3-S5.

[0008] Furthermore, step S1 also includes: reading the model and identifying the solder joint file to be detected by software; identifying according to the solder joint identification mark, and automatically retrieving and identifying the corresponding solder joint information and its center point in the node of the model.

[0009] Furthermore, reading the model through software is specifically: calling the COM interface through the API function to read the model under the SM node.

[0010] Furthermore, in step S1, the interference relationship detection method includes: Select the parts and welds whose interference relationship is to be detected, and detect the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value =0mm, the two are in a contact relationship; both collision and contact relationships are classified as interference relationships.

[0011] The present invention also proposes a system for detecting the distance from the center of a solder joint to an R angle, comprising: Parts group module: obtain all parts under the parent level of the solder joint file to be detected; detect the parts that have interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; Splitting module: Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connected parts and retains the inner part of the circle as the dividing surface; Disassembly module: disassemble the split surface; if there is only one surface after disassembly, the distance detection from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled surface to obtain the surface boundary intersection line of each surface intersecting with the cylinder; Circle drawing module: Taking the soldering point as the reference, find the boundary line of each surface closest to the soldering point and make the median perpendicular plane of the boundary line; if the boundary line's endpoint is closest to the soldering point, make the median perpendicular planes of the two boundary lines with the common endpoints; intersect the surface with the median perpendicular plane to obtain the "surface-perpendicular plane" intersection line; take the midpoint and two endpoints of the "surface-perpendicular plane" intersection line, and draw a circle with three points; Detection module: Measure the circle radius. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified.

[0012] Furthermore, it also includes: Hyperbolic surface processing module: If the solder joint is located on the intersection line of two surfaces, the two surfaces are detected according to the logic of the disassembly module, circle drawing module, and detection module.

[0013] Furthermore, the parts assembly module also includes: reading the model and identifying the solder joint file to be detected through software; identifying according to the solder joint identification mark, and automatically retrieving and identifying the corresponding solder joint information and its center point in the node of the model.

[0014] Furthermore, the parts assembly module reads the model through software specifically by calling the COM interface through the API function to read the model under the SM node.

[0015] Furthermore, the parts assembly module includes: Interference relationship detection unit: select the parts and welding points whose interference relationship is to be detected, and detect the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value = 0mm, the two are in a contact relationship; both collision relationship and contact relationship are classified as interference relationship.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can project the welding spot onto the outer surface of the part, divide the outer surface of the part into cylinders according to the settings, retain the inner curved surface of the cylinder, measure the distance from the welding spot to the disassembly surface, and detect whether the disassembly surface meets the welding requirements. The present invention simplifies the operation steps, highlights the key points, and greatly reduces the operation amount of the designer. The designer only needs to set the identification of the welding spot, determine the detection standard, and click a button to easily realize the welding spot distance R angle and flange characteristic length detection in the prior art. It avoids a large amount of manual repetitive work, and the results obtained are faster and more accurate, while improving work efficiency and reducing design costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic flow chart of the detection method of the present invention; Figure 2 is a schematic diagram of the software interface of Example 1 of the present invention; Figure 3 is a schematic diagram of identifying interfering parts in step (1) of embodiment 1 of the present invention; Figure 4 is a schematic diagram of a vertical line in step (2) of Example 1 of the present invention; Figure 5 is a schematic diagram of a cylinder in step (3) of Example 1 of the present invention; Figure 6 is a schematic diagram of segmentation in step (4) of Example 1 of the present invention; Figure 7 is a disassembly schematic diagram of step (5) of Example 1 of the present invention; Figure 8 is a schematic diagram of the intersection line of the disassembled curved surface boundary in step (7) of Example 1 of the present invention; Fig. 9 is a vertical schematic diagram of step (8) of Example 1 of the present invention; Fig.10 is a schematic diagram of drawing a circle in step (10) of Example 1 of the present invention; Fig.11 is a schematic diagram of measuring the radius of a circle in step (11) of Example 1 of the present invention; Fig.12 It is a schematic diagram of the system structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] The design concept of the present invention is to realize the automatic distance detection from the center of the solder joint to the R corner and the flange through the software system, simplify the operation logic and automatically realize the content that originally required a large number of repetitive operations manually through the code. After setting the corresponding parameters, the results can be output with one click.

[0020] According to the design concept, the method for detecting the distance from the center of the solder joint to the R angle proposed by the present invention is as follows: Figure 1 As shown, including: S1. Obtain all parts under the parent level of the solder joint file to be detected; detect parts that have an interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; S2. Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connecting parts and retains the inner part of the circle as the dividing surface; S3, disassemble the split surface; if only one curved surface is left after disassembly, the distance from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled curved surface to obtain the curved boundary intersection line of each curved surface intersecting with the cylinder; S4. Taking the soldering point as the reference, find the boundary line of each curved surface closest to the soldering point, and make the median perpendicular plane of the boundary line; if the boundary line closest to the soldering point is the endpoint, make the median perpendicular planes of the two boundary lines with the common endpoints respectively; intersect the curved surface with the median perpendicular plane to obtain the "curved surface-perpendicular plane" intersection line; take the midpoint and two endpoints of the "curved surface-perpendicular plane" intersection line, and draw a circle with the three points; S5. Measure the radius of the circle. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified; S6. If the welding point is located on the intersection line of the two curved surfaces, the two curved surfaces are detected according to the logic of steps S3-S5.

[0021] Based on the above method, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Embodiment 1: The method proposed in this embodiment includes: 1. Open the model to be tested: In this embodiment, the software interface of the solder joint distance detection is as follows: Figure 2 As shown, click Figure 2 Click "Select Product Model" in the navigation bar, open the model file list under the model storage path, and then select the model for which the solder joint distance needs to be measured. The software reads the node information and fills it in.

[0023] 2. Select product model: In the above list, select the digital model that needs to be tested for the distance from the center of the weld to the R angle and the flange. In this embodiment, the function of the three-dimensional design software CATIA is called through the API function to read the model under the SM node, and then the user clicks to select. After selection, the software system reads the node information of the selected product model and displays it.

[0024] 3. Solder point identification: According to the "weld point identification mark" filled in or selected, search one by one in the nodes of the selected product model to identify the solder point information and center point of the corresponding characters (models without center points or solder points can be automatically generated by the software).

[0025] If the weld identification mark in the product model node does not exist in the database, the software cannot recognize it. You can add the corresponding identification mark and upload it to the database.

[0026] IV. Review: After the identification mark is set, the user clicks the "Review" button, and the software will detect the solder joint according to the detection logic. If the review result is qualified, the result will be output directly; if the review result is unqualified, it is necessary to output the distance from the solder joint to the chamfer or R angle, output the detection result, and display detailed screenshot information in the details.

[0027] The software records the intersection contour information of the weld point and the same group of parts and the shortest distance, and outputs it to the test result list; when the user clicks on a row of data in the list, the data in CATIA interacts with it, displays the corresponding weld point position, and highlights it in the center; both the actual test value and the review result can be filtered; After the review results are output, users can use the "Report Export" function to download and save the review results. The list information can be exported selectively, and the file save path is customized by the user.

[0028] Functions such as measurement and detection performed during the review process can be implemented through code, or by using API functions to call the functions of 3D design software. The 3D design software can be CATIA, SolidWorks, UG, Pro / Engineer, etc. In this embodiment, CATIA API is used to call or drive CATIA software to perform operations.

[0029] The review program includes the following: (1) The software recognizes the solder joint file, identifies the parent of the solder joint file, and reads all the parts under the parent, such as Figure 3 As shown, the software recognizes the 5101310-QC01-WP front floor block reinforcement beam assembly (left) welding point, and the parent of the welding point file is the 5101310-QC01 front floor block reinforcement beam assembly (left); The software drives CATIA to detect all parts under the parent level and perform interference processing with the weld point model, and obtains the parts that have interference relationship with the weld point file, that is, the parts connected by the weld point, and the software records them and the weld point as a group; The detection method of the interference relationship includes: selecting the parts and welding points whose interference relationship is to be detected, and detecting the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value =0mm, the two are in a contact relationship; and both the collision relationship and the contact relationship are classified as interference relationships.

[0030] (2) Using the welding point as a reference, draw a vertical line connecting the parts, such as Figure 4 As shown, the welding point is the midpoint and the length is the configured length standard, which is 10 mm in this embodiment.

[0031] (3) With the set detection standard value as the radius and the perpendicular line of the connecting parts obtained in the above step (2) as the axis, make a cylinder, such as Figure 5 The detection standard value of the radius is a configured standard, which is 10 mm in this embodiment.

[0032] (4) Use the cylinder in step (3) to split the outer surface of the connected parts, and keep the inner part of the circle as the split surface; the splitting diagram is shown in Figure 6shown.

[0033] (5) Disassemble the split surface, such as Figure 7 As shown, the disassembly mode is complete disassembly, which disassembles the partition surface into all units.

[0034] (6) If only one curved surface is left after disassembly, the evaluation is qualified, that is, for this part, the distance test result from the center of the weld to the R angle and the flange is qualified.

[0035] (7) If the decomposition result is not unique, process each decomposition surface to obtain the surface boundary intersection line where each decomposition surface intersects with the cylinder, such as Figure 8 shown.

[0036] (8) Taking the solder joint as the reference, make the median perpendicular plane of the boundary line with the minimum distance from the solder joint to each surface; specifically, find the boundary line of each surface closest to the solder joint and make the median perpendicular plane of the boundary line; if the boundary line closest to the solder joint is the endpoint, make the median perpendicular plane of the two boundary lines with the common endpoint, such as Fig. 9 shown.

[0037] From this step to the final step (13), all disassembled surfaces must be processed and tested one by one.

[0038] (9) Disassemble the curved surface and the vertical plane for intersection processing to obtain the "curved surface-vertical plane" intersection line; (10) Take the midpoint and two endpoints of the intersection line of the curved surface and the vertical plane, and draw a circle with these three points, as follows: Fig.10 As shown; (11) Fig.11 As shown, if the radius of the circle drawn in the measurement step (10) is greater than the configuration threshold (in this embodiment, the configuration threshold is set to a radius of 130 mm), the curved surface is determined to be a welding surface and the evaluation result is qualified.

[0039] (12) If the radius is less than or equal to 130 mm, the surface is judged to be a chamfered surface and the evaluation result is unqualified.

[0040] (13) If the welding point is located on the intersection line of two surfaces, the two surfaces are detected according to the above logic.

[0041] Through the method of this embodiment, the designer only needs to set the identification of the solder joint, determine the detection standard, and click a button to easily implement the detection of the solder joint distance R angle and the flange characteristic length in the prior art. This avoids a large amount of manual repetitive work, and the results obtained are faster and more accurate, while improving work efficiency and reducing design costs.

[0042] Embodiment 2: In this embodiment 2, a system for detecting the distance from the center of a solder joint to the R angle is proposed. Fig.12As shown, including: Parts group module: obtain all parts under the parent level of the solder joint file to be detected; detect the parts that have interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; Splitting module: Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connected parts and retains the inner part of the circle as the dividing surface; Disassembly module: disassemble the split surface; if there is only one surface after disassembly, the distance detection from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled surface to obtain the surface boundary intersection line of each surface intersecting with the cylinder; Circle drawing module: Taking the soldering point as the reference, make the median perpendicular plane of the boundary line with the minimum distance from the soldering point to each surface; specifically, find the boundary line closest to each surface from the soldering point and make the median perpendicular plane of the boundary line; if the boundary line closest to the soldering point is the endpoint, make the median perpendicular plane of the two boundary lines with the common endpoint; intersect the surface with the median perpendicular plane to obtain the intersection line of "surface-vertical plane"; take the midpoint and two endpoints of the intersection line of "surface-vertical plane" to draw a circle; Detection module: measure the circle radius. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified; Hyperbolic surface processing module: If the solder joint is located on the intersection line of two surfaces, the two surfaces are detected according to the logic of the disassembly module, circle drawing module, and detection module.

[0043] Among them, the parts group module also includes: reading the model and identifying the welding point file to be detected through software; identifying according to the welding point identification mark, and automatically retrieving and identifying the corresponding welding point information and its center point in the node of the model.

[0044] The specific method of reading the model of the parts group module through software is: calling the COM interface through the API function to read the model under the SM node.

[0045] The parts kit module also includes: Interference relationship detection unit: select the parts and welding points whose interference relationship is to be detected, and detect the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value = 0mm, the two are in a contact relationship; both collision relationship and contact relationship are classified as interference relationship.

[0046] The system for detecting the distance from the center of a solder joint to the R angle proposed in this embodiment can implement the method for detecting the distance from the center of a solder joint to the R angle in Embodiment 1, and has the same beneficial effects as Embodiment 1.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the distance from the center of a solder joint to the R angle, characterized in that: include: S1. Obtain all parts under the parent level of the solder joint file to be detected; detect parts that have an interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; S2. Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connecting parts and retains the inner part of the circle as the dividing surface; S3, disassemble the split surface; if only one curved surface is left after disassembly, the distance from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled curved surface to obtain the curved boundary intersection line of each curved surface intersecting with the cylinder; S4. Taking the soldering point as the reference, find the boundary line of each curved surface closest to the soldering point, and make the median perpendicular plane of the boundary line; if the boundary line closest to the soldering point is the endpoint, make the median perpendicular planes of the two boundary lines with the common endpoints respectively; intersect the curved surface with the median perpendicular plane to obtain the "curved surface-perpendicular plane" intersection line; take the midpoint and two endpoints of the "curved surface-perpendicular plane" intersection line, and draw a circle with the three points; S5. Measure the radius of the circle. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified.

2. The method for detecting the distance from the solder joint center to the R angle according to claim 1, characterized in that: Also includes: S6. If the welding point is located on the intersection line of the two curved surfaces, the two curved surfaces are detected according to the logic of steps S3-S5.

3. The method for detecting the distance from the solder joint center to the R angle according to claim 1, characterized in that: Step S1 also includes: reading the model and identifying the solder joint file to be detected through software; identifying according to the solder joint identification mark, and automatically retrieving and identifying the corresponding solder joint information and its center point in the node of the model.

4. The method for detecting the distance from the center of the solder joint to the R angle according to claim 3, characterized in that: Reading the model through software is specifically as follows: calling the COM interface through the API function to read the model under the SM node.

5. The method for detecting the distance from the solder joint center to the R angle according to claim 1, characterized in that: In step S1, the interference relationship detection method includes: Select the parts and welds whose interference relationship is to be detected, and detect the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value =0mm, the two are in a contact relationship; both collision and contact relationships are classified as interference relationships.

6. A system for detecting the distance from the center of a solder joint to the R angle, characterized in that: include: Parts group module: Get all parts under the parent level of the welding point file to be detected; Detect the parts that have interference relationship with the solder joint file to be detected, that is, the connecting parts of the solder joint, and record them together with the solder joint as a connecting parts group; Splitting module: Take the welding point as the reference and midpoint to make a vertical line connecting the parts; take the set inspection standard value as the radius and the vertical line as the axis to make a cylinder; the cylinder divides the outer surface of the connected parts and retains the inner part of the circle as the dividing surface; Disassembly module: disassemble the split surface; if there is only one surface after disassembly, the distance detection from the center of the solder joint to the R angle is qualified; otherwise, process each disassembled surface to obtain the surface boundary intersection line of each surface intersecting with the cylinder; Circle drawing module: Taking the soldering point as the reference, find the boundary line of each surface closest to the soldering point and make the median perpendicular plane of the boundary line; if the boundary line's endpoint is closest to the soldering point, make the median perpendicular planes of the two boundary lines with the common endpoints; intersect the surface with the median perpendicular plane to obtain the "surface-perpendicular plane" intersection line; take the midpoint and two endpoints of the "surface-perpendicular plane" intersection line, and draw a circle with three points; Detection module: Measure the circle radius. If it is greater than the configured threshold, the surface is a welding surface and the distance detection is qualified; if it is less than or equal to the configured threshold, the surface is a chamfered surface and the distance detection is unqualified.

7. The system for detecting the distance from the center of a solder joint to the R angle according to claim 6, characterized in that: Also includes: Hyperbolic surface processing module: If the solder joint is located on the intersection line of two surfaces, the two surfaces are detected according to the logic of the disassembly module, circle drawing module, and detection module.

8. The system for detecting the distance from the center of a solder joint to the R angle according to claim 6, characterized in that: The parts assembly module also includes: reading the model and identifying the welding point file to be detected through software; identifying according to the welding point identification mark, and automatically retrieving and identifying the corresponding welding point information and its center point in the node of the model.

9. The system for detecting the distance from the center of a solder joint to the R angle according to claim 8, characterized in that: The specific method of reading the model of the parts group module through software is: calling the COM interface through the API function to read the model under the SM node.

10. The system for detecting the distance from the center of a solder joint to the R angle according to claim 6, characterized in that: The parts kit module includes: Interference relationship detection unit: select the parts and welding points whose interference relationship is to be detected, and detect the gap value between the two; if the gap value is <0mm, the two are in a collision relationship; if the gap value = 0mm, the two are in a contact relationship; both collision relationship and contact relationship are classified as interference relationship.

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