Method and device for measuring flanging height of outer covering part of vehicle body and storage medium

Abstract

The invention discloses a vehicle body outer covering part flanging height measuring method and device and a storage medium, and belongs to the technical field of precision measurement, and the method specifically comprises the following steps: 1, making a measuring point; step 2, performing programming by adopting METROLOG software; according to the method, design software is combined with a three-coordinate measuring machine, measurement elements can be accurately set on the same section, and element data are accurately collected; processing and calculating the measured value through a software algorithm so as to determine the flanging height value of the position; and the complete process of the measurement program can be automatically recorded and properly stored by the system, so that in the subsequent measurement process, the accuracy and the consistency of the measurement result in the subsequent measurement process are ensured to the greatest extent.

Description

Technical Field

[0001] The present invention belongs to the field of precision measurement technology, and in particular relates to a method, a device and a storage medium for measuring the flange height of an outer covering part of a vehicle body. Background Art

[0002] In the design and manufacturing process of the automotive industry, the dimensional measurement of parts plays a vital role, especially in the assembly of covering parts related to the appearance of the car body, such as front and rear hoods, door panels, etc. These components generally adopt a combination process of outer panels covering inner panels, and the height of the flange around the single piece determines the width and quality of the overlapping area of ​​the flange in the part assembly. Therefore, in the mold design and adjustment process, the precise control of the flange height of the outer panel monomer edge has become the core element of measuring dimensional quality. This means that the flange area needs to be repeatedly and carefully measured, and the mold needs to be adjusted in time according to the measurement results.

[0003] At present, when measuring the flange height of automobile outer cover parts, the industry mainly uses vernier calipers, rulers and other measuring tools for manual inspection. The disadvantage is that there are potential errors due to factors such as tool slippage, uncertainty in starting and ending point positioning, measurement angle deviation, and easy deformation of parts during the measurement process. In addition, manual inspection efficiency is low. The single-point measurement and reading time takes about 0.7 to 1.2 minutes, and the measurement of a complete circle of flange can take up to 2 hours. There is an urgent need for an accurate and intelligent measurement method for flange height measurement. Summary of the invention

[0004] In view of the instability and inefficiency of manual measurement of the flange height of automobile outer covering parts in the prior art, the present invention provides a method, equipment and storage medium for measuring the flange height of automobile outer covering parts. The method utilizes design software in combination with a three-coordinate measuring machine, and can accurately set measurement elements on the same section and accurately collect element data; then the measured values ​​are processed and calculated through software algorithms to determine the flange height value at that position; and this complete process will be automatically recorded and properly saved by the system through the measurement program, so as to ensure that the accuracy and consistency of the measurement results in the subsequent measurement process are guaranteed to the greatest extent.

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a method for measuring the height of a flange of a vehicle body outer cover, which specifically comprises the following steps:

[0007] Step 1: Make measurement points, including:

[0008] A1. Extract the flange edge curve and the curves on both sides of the R angle of the body outer cover and perform offset processing;

[0009] A2. Make a cross section around the flange;

[0010] A3. Use the cross section to divide the curve into intersections and find the theoretical intersections in space;

[0011] A4, output measurement points;

[0012] Step 2: Use METROLOG software for programming;

[0013] B1. Import the digital model and measurement points of the vehicle body outer covering parts;

[0014] B2. Define the measurement order of the obtained measurement points and then perform the measurement;

[0015] B3. Construct straight lines according to the measured values ​​of the measuring points to find the intersection points;

[0016] B4. Evaluate the flange length and output the measurement result report.

[0017] Furthermore, step A1 includes the following contents:

[0018] A11. Import the digital model of the body exterior cover to be measured into the CATIA design software;

[0019] A12. Insert a geometric set and use the Join command to extract and join the outermost edge curve of the flange and the tangent lines on the upper and lower sides of the flange R angle in sequence;

[0020] A13. Use the parallel curve command to construct offset curves along the outermost edge curve of the flange 1mm upward, the lower tangent line of the flange R angle offset 1mm downward, and the upper tangent line of the flange R angle offset 1mm and 6mm inward. Select the product surface as the support surface, and generate a total of 4 curves.

[0021] Furthermore, in step A2, the copy command is used to construct the section with a measurement spacing of 80 mm, and the intervals at the key dimensional positions are encrypted.

[0022] Furthermore, both sides of the sharp corner are spaced 30 mm apart.

[0023] Furthermore, step A3 specifically includes the following contents:

[0024] A31. Use the intersection command to intersect the cross section generated in step A2, the flange edge line, and the four curves generated in step A1, and obtain five segmentation intersection points on each cross section.

[0025] A32. Use the two segmentation intersection points of the same side end face to construct a straight line, and the spatial theoretical intersection point PNTX can be obtained through the two intersecting straight lines;

[0026] A33. Repeat step A32, construct straight lines at all cross-section positions along the circumference of the part, and find the theoretical intersection points in space.

[0027] Furthermore, in step A4, the digital model of the vehicle body outer covering and all the curves obtained by the construction are hidden, and all the theoretical intersections in space are output in IGS format.

[0028] Furthermore, in step B2, program self-learning is performed by creating a new program command, and then the obtained spatial theoretical intersection point PNT X is defined in the software 3D window using the geometric point definition command;

[0029] In step B2, the measurement point is measured using the measure surface point command;

[0030] In step B3, the straight line is constructed using the Construct Line command, and the intersection of the straight lines is found using the Construct Point command;

[0031] In step B4, the evaluation distance command is used to evaluate the actual length between the two points, and a tolerance is assigned to finally obtain the flange height measurement result at that position.

[0032] In a second aspect, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for measuring the flange height of an outer cover of a vehicle body as described in any one of the embodiments of the present invention is implemented.

[0033] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for measuring the flange height of a vehicle body outer cover as described in any one of the embodiments of the present invention.

[0034] Compared with the prior art, the advantages of the present invention are as follows:

[0035] 1. A method, device and storage medium for measuring the flange height of a vehicle body outer cover of the present invention have a high measurement efficiency of 40%, shortening the detection time and saving manpower;

[0036] 2. Through the linkage between CATIA software and three-coordinate, the measurement accuracy is greatly enhanced, the waste is reduced, and the product quality is indirectly improved;

[0037] 3. Simplify the process, reduce the burden on workers, and enhance the controllability and standardization of the process. This technological innovation not only improves practical performance, but also optimizes accuracy, efficiency and cost, effectively promoting the economic benefits and sustainable development of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0039] Figure 1 A schematic flow chart of a method for measuring the flange height of a vehicle body outer covering part according to the present invention;

[0040] Figure 2 Generate a schematic diagram for the curve;

[0041] Figure 3 It is a schematic diagram of curve extraction and combination;

[0042] Figure 4 To construct a cross-sectional schematic diagram;

[0043] Figure 5 This is a schematic diagram of the output measurement points;

[0044] Figure 6 Schematic diagram for defining measurement points;

[0045] Figure 7 This is a schematic diagram of the structure of an electronic device in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0046] In order to clearly and completely describe the technical solution and its specific working process of the present invention, the specific implementation methods of the present invention are as follows in conjunction with the accompanying drawings of the specification:

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides a method for measuring the flange height of a vehicle body outer cover, which specifically includes the following steps:

[0052] Step 1: Make measurement points, including:

[0053] A1. Extract the flange edge curve and the curves on both sides of the R angle of the body outer cover and perform offset processing, as follows:

[0054] A11. Import the digital model of the body exterior cover to be measured into the CATIA design software;

[0055] A12. Insert a geometric set and use the Join command to extract and join the outermost edge curve of the flange and the upper and lower tangents of the flange R angle in sequence, such as Figure 2 As shown;

[0056] A13. Use the parallel curve command to construct offset curves along the outermost edge curve of the flange upward by 1mm, and the tangent line of the lower end of the flange R angle downward by 1mm, and the tangent line of the upper end of the flange R angle inward by 1mm and 6mm. Select the product surface as the support surface, and generate a total of 4 curves, such as Figure 3 As shown;

[0057] A2. Make a cross section around the flange;

[0058] Specifically, the copy command is used to construct the cross section with a measurement interval of 80 mm, and the intervals at the key locations of the dimensions are encrypted, such as Figure 4 As shown; the two sides of the sharp corners are spaced 30mm apart.

[0059] A3. Use the cross section to divide the curve into intersections and find the theoretical intersections in space, including:

[0060] A31. Use the intersection command to intersect the cross section generated in step A2, the flange edge line, and the four curves generated in step A1, and obtain five segmentation intersection points on each cross section.

[0061] A32. Use the two segmentation intersection points of the same side end face to construct a straight line. The spatial theoretical intersection point PNTX can be obtained through the two intersecting straight lines. The measuring point name can be set according to programming habits.

[0062] A33. Repeat step A32, construct straight lines at all cross-section positions along the circumference of the part, and find the theoretical intersection points in space.

[0063] A4, output measurement points;

[0064] Specifically, the digital model of the outer body cover and all the curves obtained by the structure are hidden, and all the theoretical intersections of the space are output in IGS format, such as Figure 5 As shown;

[0065] Step 2: Use METROLOG software for programming;

[0066] B1. Import the digital model and measurement points of the body outer covering parts;

[0067] B2. Define the measurement order of the obtained measurement points and then perform the measurement;

[0068] Use the new program command to perform program self-learning, and then use the geometric point definition command to define the obtained spatial theoretical intersection point PNT X in the software 3D window; Figure 6 As shown, define other measuring points in the order of PNT ABCDE, define E as the edge measuring point, and ABCD as the surface measuring point; then use the Measure Surface Point command to measure the measuring points ABCDE;

[0069] B3. Construct straight lines according to the measured values ​​of the measuring points to find the intersection points;

[0070] Use the Construct Line command to construct a line. Select points A and B as line 1, and C and D as line 2. Use the Construct Point command to find the intersection of the lines.

[0071] B4. Evaluate the flange length and output the measurement result report;

[0072] Use the Evaluate Distance command, click Element, select E, select PNT X, evaluate the actual length between the two points, and assign a tolerance to finally obtain the flange height measurement result at this position.

[0073] Repeat the above steps to define the measuring points and complete the programmed measurement of the part circumference (select the measuring angle of the probe and adjust the stroke to avoid interference), and output the measurement result report.

[0074] After programming is completed, save the program, set the program name and arrange the storage location reasonably for use in the next measurement.

[0075] When measuring the part again, the operator only needs to call the previously stored preset measurement program, and the system will automatically execute all operation processes to achieve efficient and accurate measurement of the part flange height.

[0076] In this embodiment, a method for measuring the flange height of a vehicle body outer cover is provided. The measurement point layout is carefully made using CATIA design software, and the intersection coordinates of the theoretical flange space are preset, which can effectively standardize the selection of the measurement position, fundamentally eliminate the measurement point displacement and angle deviation problems caused by human operation, and greatly improve the accuracy of the measurement points; secondly, by designing a precise three-coordinate measuring machine programming scheme, the operation that may be affected by human factors is converted into a programmed automated process. In the actual measurement stage, it is only necessary to call the preset measurement program to ensure that each measurement is performed at the predetermined position point. This method of locking the measurement position greatly enhances the reliability and reproducibility of the measurement results; in addition, relying on the automation characteristics of the three-coordinate measuring machine, not only the accuracy of a single measurement is significantly improved, but also the overall measurement efficiency is greatly improved, so that in repetitive testing or mass production inspection, the consistency and accuracy of the measurement can be maintained to the greatest extent, thereby effectively ensuring the strictness and stability of product quality control.

[0077] Example 2

[0078] Figure 7 This is a schematic diagram of the structure of a computer device in Example 2 of the present invention. Figure 7 A block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention is shown. Figure 7 The computer device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0079] like Figure 7As shown, the computer device 12 is in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0080] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0081] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0082] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 7 not shown, usually called a "hard drive"). Although Figure 7 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0083] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0084] The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable a user to interact with the computer device 12, and / or communicate with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the computer device 12 in this embodiment, the display 24 does not exist as an independent individual, but is embedded in the mirror surface, and when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. In addition, the computer device 12 may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the computer device 12 through a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0085] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28 , for example, implementing a method for measuring the flange height of a vehicle body outer cover provided in an embodiment of the present invention.

[0086] Example 3

[0087] Embodiment 3 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a method for measuring the flange height of a vehicle body outer cover provided in all the embodiments of the present application is implemented.

[0088] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0089] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0090] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0091] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0092] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for measuring the flange height of a vehicle body outer covering, characterized in that: The specific steps include: Step 1: Make measurement points, including: A1. Extract the flange edge curve and the curves on both sides of the R angle of the body outer cover and perform offset processing; A2. Make a cross section around the flange; A3. Use the cross section to divide the curve into intersections and find the theoretical intersections in space; A4, output measurement points; Step 2: Use METROLOG software for programming; B1. Import the digital model and measurement points of the vehicle body outer covering parts; B2. Define the measurement order of the obtained measurement points and then perform the measurement; B3. Construct straight lines according to the measured values ​​of the measuring points to find the intersection points; B4. Evaluate the flange length and output the measurement result report.

2. A method for measuring the flange height of a vehicle body outer covering according to claim 1, characterized in that: Step A1 includes the following: A11. Import the digital model of the body exterior cover to be measured into the CATIA design software; A12. Insert a geometric set and use the Join command to extract and join the outermost edge curve of the flange and the tangent lines on the upper and lower sides of the flange R angle in sequence; A13. Use the parallel curve command to construct offset curves along the outermost edge curve of the flange 1mm upward, the lower tangent line of the flange R angle offset 1mm downward, and the upper tangent line of the flange R angle offset 1mm and 6mm inward. Select the product surface as the support surface, and generate a total of 4 curves.

3. A method for measuring the flange height of a vehicle body outer covering as claimed in claim 1, characterized in that: In step A2, use the copy command to construct the section with a measurement spacing of 80 mm, and increase the spacing at key dimensional locations.

4. A method for measuring the flange height of a vehicle body outer covering as claimed in claim 3, characterized in that: The two sides of the sharp corners are spaced 30 mm apart.

5. A method for measuring the flange height of a vehicle body outer covering as claimed in claim 1, characterized in that: Step A3 specifically includes the following contents: A31. Use the intersection command to intersect the cross section generated in step A2, the flange edge line, and the four curves generated in step A1, and obtain five segmentation intersection points on each cross section. A32. Use the two segmentation intersection points of the same side end face to construct a straight line, and the spatial theoretical intersection point PNTX can be obtained through the two intersecting straight lines; A33. Repeat step A32, construct straight lines at all cross-section positions along the circumference of the part, and find the theoretical intersection points in space.

6. A method for measuring the flange height of a vehicle body outer covering as claimed in claim 1, characterized in that: In step A4, the digital model of the vehicle body outer cover and all the curves obtained by the construction are hidden, and all the theoretical intersection points in space are output in IGS format.

7. A method for measuring the flange height of a vehicle body outer covering as claimed in claim 1, characterized in that: In step B2, the program self-learning is performed by creating a new program command, and then the obtained spatial theoretical intersection point PNT X is defined in the software 3D window using the geometric point definition command; In step B2, the measurement point is measured using the measure surface point command; In step B3, the straight line is constructed using the Construct Line command, and the intersection of the straight lines is found using the Construct Point command; In step B4, the evaluation distance command is used to evaluate the actual length between the two points, and a tolerance is assigned to finally obtain the flange height measurement result at that position.

8. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, a method for measuring the flange height of an outer cover of a vehicle body as described in any one of claims 1 to 7 is implemented.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, a method for measuring the flange height of a vehicle body outer covering part as claimed in any one of claims 1 to 7 is implemented.

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