A method, apparatus, computer equipment, and storage medium for inspecting a workpiece.

Abstract

This invention discloses a workpiece inspection method, apparatus, computer equipment, and storage medium. The method includes: constructing a three-dimensional model of the workpiece; extracting contour lines from the profile lines on the three-dimensional model; constructing theoretical inspection points on the contour lines and forming a first theoretical inspection path; inspecting the workpiece according to the first theoretical inspection path to obtain a first actual inspection point; performing one or more processing steps, such as offsetting, translating, and correcting, on the first theoretical inspection path to construct a second theoretical inspection path; and inspecting the workpiece according to the second theoretical inspection path to obtain a second actual inspection point. This invention creates a theoretical inspection path for the profile inspection process using a three-dimensional model of the workpiece, and creates theoretical inspection paths for other areas by performing offsetting, translating, and correcting processing on this theoretical path. This enables guided design and precision machining of the workpiece, ensures accurate compressor cavity volume, and improves compressor performance.

Description

Technical Field

[0001] This invention relates to the field of parts measurement technology, and in particular to a method, apparatus, computer equipment, and storage medium for detecting workpieces. Background Technology

[0002] Currently, scroll compressors in the industry achieve sealing by maintaining a certain gap between the moving and stationary scroll plates during operation. This gap-sealing principle results in poor meshing and sealing between the moving and stationary scroll plates, frequently leading to seizing or breakage. Furthermore, it makes it impossible to accurately guarantee the compression chamber volume, directly hindering the improvement of discharge pressure and efficiency in scroll compressors. In addition, many factors affect the meshing accuracy of the moving and stationary scroll plates and the compressor efficiency, placing high demands on the testing techniques for the scroll components of scroll compressors.

[0003] In the existing process of inspecting scroll components, operators need to use a coordinate measuring machine to manually construct theoretical paths for the inner profile, outer profile, intermediate correction section, tooth tip, and tooth root of the scroll disk, or create theoretical paths by marking points. However, this method has problems such as large deviations in inspection data and low inspection efficiency, and it has little guiding role and poor guiding effect for research and development and processing. Summary of the Invention

[0004] The purpose of this invention is to provide a method, apparatus, computer equipment, and storage medium for detecting workpieces, aiming to solve the problems of large deviations in detection data and low detection efficiency in existing technologies.

[0005] In a first aspect, embodiments of the present invention provide a workpiece inspection method, comprising:

[0006] Construct a 3D model of the workpiece;

[0007] Extract the outline of the profile line from the three-dimensional model;

[0008] Theoretical detection points are constructed along the contour line, forming a first theoretical detection path;

[0009] The workpiece is inspected according to the first theoretical inspection path to obtain the first actual inspection point;

[0010] The first theoretical detection path is subjected to one or more of the following processes: biasing, translation, and correction, to construct the second theoretical detection path;

[0011] The workpiece is inspected according to the second theoretical inspection path to obtain the second actual inspection point.

[0012] In a second aspect, embodiments of the present invention provide a workpiece inspection device, comprising:

[0013] Building blocks are used to construct 3D models of workpieces;

[0014] The cutting unit is used to cut out the contour lines on the profile lines on the three-dimensional model;

[0015] The first theoretical detection path construction unit is used to construct theoretical detection points on the contour line and form a first theoretical detection path;

[0016] The first actual detection point acquisition unit is used to detect the workpiece according to the first theoretical detection path and acquire the first actual detection point;

[0017] The processing unit is used to perform one or more of the following processes on the first theoretical detection path: biasing, translation, and correction, to construct a second theoretical detection path;

[0018] The second actual detection point acquisition unit is used to detect the workpiece according to the second theoretical detection path and acquire the second actual detection point.

[0019] Thirdly, embodiments of the present invention provide a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the workpiece inspection method described in the first aspect.

[0020] Fourthly, embodiments of the present invention also provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the workpiece inspection method described in the first aspect.

[0021] This invention provides a workpiece inspection method, apparatus, computer equipment, and storage medium. The method includes: constructing a three-dimensional model of the workpiece; extracting contour lines from the profile on the three-dimensional model; constructing theoretical inspection points on the contour lines and forming a first theoretical inspection path; inspecting the workpiece according to the first theoretical inspection path to obtain a first actual inspection point; performing one or more processing steps, such as offsetting, translating, and correcting, on the first theoretical inspection path to construct a second theoretical inspection path; and inspecting the workpiece according to the second theoretical inspection path to obtain a second actual inspection point. This invention creates a theoretical inspection path for the profile inspection process using a three-dimensional model of the workpiece, and creates theoretical inspection paths for other areas by performing offsetting, translating, and correcting processing on this theoretical path. This enables guided design and precision machining of the workpiece, greatly improving the grinding effect, and achieving optimal meshing of the moving and stationary scroll teeth under thermal equilibrium with no clearance and no interference, while ensuring accurate compressor cavity volume and improving compressor performance. This invention possesses advantages such as reasonable detection process, low detection cost, better energy-saving effect, and stronger practicality. It can improve the meshing sealing performance of the moving scroll plate and the stationary scroll plate, improve the product performance of scroll compressors, and promote technological progress in the scroll compressor industry. The embodiments of this invention also provide a workpiece detection device, a computer-readable storage medium, and a computer device, which have the above-mentioned beneficial effects, and will not be elaborated further here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of a workpiece inspection method according to this embodiment;

[0024] Figure 2 This is a schematic diagram of the theoretical detection path for the inner profile line, outer profile line, and center correction section.

[0025] Figure 3 This is a schematic diagram of the theoretical detection path for the tooth tip and tooth root;

[0026] Figure 4 A schematic diagram showing the simultaneous extraction points at the tooth tip;

[0027] Figure 5 A schematic diagram of the simultaneous extraction points at the tooth base;

[0028] Figure 6 A schematic diagram showing the simultaneous extraction points at the tooth tip and tooth root;

[0029] Figure 7 This is a schematic block diagram of a workpiece inspection device according to this embodiment; Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] Please see Figure 1 The present invention provides a workpiece inspection method, comprising:

[0035] S101: Construct a 3D model of the workpiece;

[0036] Furthermore, 3D modeling software such as CAD, Solidworks, PRO / E, 3DMAX, and UG can be used to create 3D models of the workpiece. After 3D modeling, the 3D model is transferred to a coordinate measuring machine for inspection. The workpiece can be a moving scroll plate or a stationary scroll plate.

[0037] S102: Extract the outline of the profile line from the three-dimensional model;

[0038] Among them, multiple contour lines at different positions can be extracted on the 3D model according to actual detection needs.

[0039] S103: Construct theoretical detection points on the contour line and form a first theoretical detection path;

[0040] In one embodiment, see Figure 2 Theoretical detection points are constructed on the inner and outer contour lines and the center correction segment of the outline, and corresponding detection paths are formed.

[0041] S104: Detect the workpiece according to the first theoretical detection path to obtain the first actual detection point;

[0042] In one embodiment, the workpiece is inspected along the path formed by the inner contour line, outer contour line, and theoretical detection point on the center correction segment to obtain the first actual detection point.

[0043] Among them, the profile and thickness of the workpiece have a great impact on the performance and reliability of the compressor. If the profile is small and / or the thickness is too small, it may cause gas leakage and affect the performance of the compressor. If the profile is large and / or the thickness is too large, it may cause interference between the moving and stationary plates and jamming, resulting in serious reliability issues. In this embodiment, the profile and thickness of the workpiece can be obtained by comparing and analyzing the theoretical detection point with the first actual detection point.

[0044] Specifically, the overall profile of the workpiece surface is obtained by the difference between the maximum and minimum deviations of the profile. The thickness deviation of the surface is calculated by the distance difference between the first actual detection point and the theoretical detection point. The actual thickness of the profile is obtained by the average distance difference between the first actual detection points on the inner and outer profile lines.

[0045] S105: Perform one or more of the following processes on the first theoretical detection path: offset, translation, and correction, to construct a second theoretical detection path;

[0046] Furthermore, the first theoretical detection path is subjected to one or more of the following processes: offset, translation, and correction, to construct the detection path of the tooth tip and tooth root plane of the workpiece.

[0047] In one embodiment, see Figure 3 One or more of the following processes are applied to the theoretical detection points on the inner profile, outer profile, and center correction section: offset, translation, and correction, to construct the detection path for the tooth tip and tooth root plane of the workpiece.

[0048] The offsetting process includes: setting the offset amount according to the actual structure, size, and actual position to be detected of the workpiece plane, and offsetting the theoretical detection point along the vector direction or the opposite direction according to the offset amount;

[0049] The translation process includes: adjusting the vector direction of the theoretical detection point to be consistent with the vector direction of the plane being measured, and then translating the theoretical detection point along the adjusted vector direction to the actual height of the plane being measured;

[0050] The correction process includes: determining whether the theoretical detection point passes through the concave and convex areas of the workpiece plane; if so, the theoretical detection point in the concave and convex areas is corrected or bypassed; otherwise, the detection continues.

[0051] In one embodiment, the offset amount is set according to the actual structure, size, and actual position to be detected of the workpiece plane. Then, the offset command function of the coordinate measuring machine can be used to offset all theoretical detection points along the vector direction of the point or the opposite direction.

[0052] S106: The workpiece is inspected according to the second theoretical inspection path to obtain the second actual inspection point.

[0053] In one embodiment, the detection probe contacts the tooth tip and tooth root plane of the moving workpiece, and completes the detection of the tooth tip and tooth root plane according to the detection path constructed by the workpiece. This can quickly and accurately complete the detection of the tooth tip and tooth root plane, and can avoid the probe from detecting the edge on the narrow surface, and can also avoid the probe from detecting the hole position, etc. This can complete the detection of the flatness of the tooth tip and tooth root. Excessive flatness can easily cause gas leakage and affect the performance of the compressor.

[0054] Furthermore, the position and height of the actual detection points on the end face at predetermined intervals are extracted by using the offset angle method, and the height compatibility of different positions is analyzed by using the position and height of the actual detection points on the end face.

[0055] If there are too many actual detection points, it will be difficult to make regular statistics on the actual situation of the workpiece. If there are too few actual detection points, it will cause large errors in the result analysis. In this embodiment, the offset angle can be adjusted according to the situation used for data analysis or the number of points required.

[0056] Furthermore, during the workpiece testing and processing, offset angles of 5° and 10° can be selected to monitor the processing effect. If the product processing process is mature, the offset angle can be widened to 30° and 45°. The offset angle should preferably not exceed 45° to avoid insufficient data, which could lead to large errors in the result analysis. The offset angle should also preferably not be lower than 5°, as it would be difficult to perform regular statistical analysis on the actual situation of the workpiece.

[0057] In one embodiment, see Figure 4-6The positions and heights of the actual detection points on the end faces of the moving and stationary scroll plates, at an offset angle of 30°, are extracted. The height difference is analyzed by examining the positions and heights of these actual detection points. The purpose of analyzing the height difference is to ensure the meshing and sealing performance of the moving and stationary scroll plates. If the height difference between the tooth tips and roots of the moving and stationary scroll plates is too small, it can easily cause gas leakage and affect the compressor performance. If the height difference between the tooth tips and roots of the moving and stationary scroll plates is too large, it may cause interference and wear at the tooth tips. Therefore, when selecting components, it is important to ensure that the tooth heights of the moving and stationary scroll plates are as similar as possible.

[0058] It should be noted that the workpiece inspection method proposed in this invention can be used to initially construct theoretical inspection points and form theoretical inspection paths using a three-dimensional model under different vortex R&D projects and schemes. These initially constructed theoretical inspection points are then offset, translated, and rotated to construct theoretical inspection paths for other planes, which are then used for the extraction and analysis of actual inspection points. This invention features a reasonable inspection process, low inspection cost, better energy-saving effect, and strong practicality. It ensures standardized inspection, greatly reduces the workload of operators, and to a certain extent reduces human error, improving inspection efficiency and accuracy. It enables guided design and precision machining of workpieces, significantly improving the workpiece grinding effect. Furthermore, it achieves the optimal meshing state of the vortex teeth of the moving and stationary vortex disks under thermal equilibrium, without gaps or interference, and ensures a precise compressor volume, improving compressor performance.

[0059] Please see Figure 7 This embodiment provides a workpiece inspection device 700, including:

[0060] Construction unit 701 is used to construct the three-dimensional model of the workpiece;

[0061] The cutting unit 702 is used to cut out the contour line on the profile line on the three-dimensional model;

[0062] The first theoretical detection path construction unit 703 is used to construct theoretical detection points on the contour line and form a first theoretical detection path;

[0063] The first actual detection point acquisition unit 704 is used to detect the workpiece according to the first theoretical detection path and acquire the first actual detection point;

[0064] The processing unit 705 is used to perform one or more of the following processes on the first theoretical detection path: offsetting, translating, and correcting, to construct a second theoretical detection path;

[0065] The second actual detection point acquisition unit 706 is used to detect the workpiece according to the second theoretical detection path and acquire the second actual detection point.

[0066] Furthermore, the first actual detection point acquisition unit 704 includes:

[0067] The detection subunit is used to detect the workpiece according to the path formed by the theoretical detection points on the inner contour line, outer contour line and center correction segment of the contour line, and obtain the first actual detection point.

[0068] Furthermore, the detection subunit includes:

[0069] The comparative analysis subunit is used to compare and analyze the theoretical detection point with the first actual detection point. The overall profile of the workpiece surface is obtained by the difference between the maximum and minimum deviation of the profile. The thickness deviation of the surface is calculated by the distance difference between the first actual detection point and the theoretical detection point. The actual thickness of the profile is obtained by the average distance difference between the first actual detection points on the inner and outer profile lines.

[0070] Furthermore, the processing unit 705 includes:

[0071] The offset subunit is used to set the offset amount according to the actual structure, size, and actual position to be detected of the workpiece plane, and to offset the theoretical detection point along the vector direction or the opposite direction according to the offset amount.

[0072] The translation subunit is used to adjust the vector direction of the theoretical detection point to be consistent with the vector direction of the plane being measured, and then translate the theoretical detection point along the adjusted vector direction to the actual height of the plane being measured.

[0073] The correction subunit is used to determine whether the theoretical detection point passes through the concave and convex areas of the workpiece plane. If so, the theoretical detection point in the concave and convex areas is corrected or bypassed. If not, the detection continues.

[0074] Furthermore, the processing unit 705 also includes:

[0075] The detection path construction subunit for tooth tip and tooth root is used to perform one or more of the following processes on the first theoretical detection path: offset, translation, and correction, to construct the detection path for the tooth tip and tooth root plane of the workpiece.

[0076] Furthermore, the second actual detection point acquisition unit 706 includes:

[0077] The position and height extraction subunit is used to extract the position and height of the actual detection points on the end face at predetermined angle intervals by using an offset angle method, and to analyze the height compatibility of different positions by using the position and height of the actual detection points on the end face.

[0078] Furthermore, the position and height extraction subunit includes:

[0079] The offset angle adjustment subunit is used to adjust the offset angle according to the data analysis situation or the number of points required.

[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and unit can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0081] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, can implement the methods provided in the above embodiments. The storage medium may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0082] The present invention also provides a computer device, which may include a memory and a processor. The memory stores a computer program, and when the processor calls the computer program in the memory, it can implement the methods provided in the above embodiments. Of course, the computer device may also include various network interfaces, power supplies, and other components.

[0083] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0084] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusivity.

[0085] The term "comprises" implies that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A workpiece inspection method, characterized in that, include: Construct a 3D model of the workpiece; Extract the outline of the profile line from the three-dimensional model; Theoretical detection points are constructed along the contour line, forming a first theoretical detection path; The workpiece is inspected according to the first theoretical inspection path to obtain the first actual inspection point; The first theoretical detection path is subjected to one or more of the following processes: biasing, translation, and correction, to construct the second theoretical detection path; The workpiece is inspected according to the second theoretical inspection path to obtain the second actual inspection point; The offset process includes: setting an offset amount based on the actual structure, size, and actual detection position of the tooth tip and tooth root plane of the workpiece, and offsetting the theoretical detection point along the vector direction or the opposite direction according to the offset amount; The translation process includes: adjusting the vector direction of the theoretical detection point to be consistent with the vector direction of the plane being measured, and then translating the theoretical detection point along the adjusted vector direction to the actual height of the plane being measured; The correction process includes: determining whether the theoretical detection point passes through the concave and convex areas of the tooth tip and tooth root plane of the workpiece; if so, the theoretical detection point in the concave and convex areas is corrected or bypassed; if not, the detection continues. Based on the actual structure, size, and actual detection positions of the tooth tip and root planes of the workpiece, set the offset amount, and use the offset command function of the coordinate measuring machine to offset all theoretical detection points along the vector direction of the point or the opposite direction.

2. The workpiece inspection method according to claim 1, characterized in that, The workpiece is inspected according to the first theoretical inspection path to obtain the first actual inspection point, including: The workpiece is inspected according to the path formed by the theoretical detection points on the inner contour line, outer contour line, and center correction segment of the contour line to obtain the first actual detection point.

3. The workpiece inspection method according to claim 2, characterized in that, The workpiece is inspected along the path formed by the theoretical detection points on the inner contour line, outer contour line, and center correction segment of the contour line. After obtaining the first actual detection point, the following steps are taken: The theoretical detection point is compared and analyzed with the first actual detection point. The overall profile of the workpiece surface is obtained by the difference between the maximum and minimum deviation of the profile. The thickness deviation of the surface is calculated by the distance difference between the first actual detection point and the theoretical detection point. The actual thickness of the profile is obtained by the average distance difference between the first actual detection points on the inner and outer profile lines.

4. The workpiece inspection method according to claim 1, characterized in that, The step of performing one or more of the following processes on the first theoretical detection path—biasing, translation, and correction—to construct the second theoretical detection path includes: The first theoretical detection path is subjected to one or more of the following processes: offset, translation, and correction, to construct the detection path for the tooth tip and tooth root plane of the workpiece.

5. The workpiece inspection method according to claim 1, characterized in that, The step of detecting the workpiece according to the second theoretical detection path and obtaining the second actual detection point includes: extracting the position and height of the actual detection point on the end face at a predetermined angle interval by using the offset angle method, and analyzing the height compatibility of different positions by using the position and height of the actual detection point on the end face.

6. The workpiece inspection method according to claim 5, characterized in that, The method of extracting the position and height of the actual detection points on the end face at predetermined intervals by using the offset angle method includes: Adjust the offset angle according to the data analysis scenario or the number of points required.

7. A workpiece inspection device, characterized in that, include: Building blocks are used to construct 3D models of workpieces; The cutting unit is used to cut out the contour lines on the profile lines on the three-dimensional model; The first theoretical detection path construction unit is used to construct theoretical detection points on the contour line and form a first theoretical detection path; The first actual detection point acquisition unit is used to detect the workpiece according to the first theoretical detection path and acquire the first actual detection point; The processing unit is used to perform one or more of the following processes on the first theoretical detection path: biasing, translation, and correction, to construct a second theoretical detection path; The second actual detection point acquisition unit is used to detect the workpiece according to the second theoretical detection path and acquire the second actual detection point; The processing unit includes: The offset subunit is used to set the offset amount according to the actual structure, size, and actual detection position of the tooth tip and tooth root plane of the workpiece, and to offset the theoretical detection point along the vector direction or the opposite direction according to the offset amount. The translation subunit is used to adjust the vector direction of the theoretical detection point to be consistent with the vector direction of the plane being measured, and then translate the theoretical detection point along the adjusted vector direction to the actual height of the plane being measured. The correction subunit is used to determine whether the theoretical detection point passes through the concave and convex areas of the tooth tip and tooth root plane of the workpiece. If so, the theoretical detection point in the concave and convex areas is corrected or bypassed; otherwise, the detection continues. The instruction uses a sub-unit to set the offset amount based on the actual structure, size, and actual detection position of the tooth tip and root plane of the workpiece. It uses the offset instruction function of the coordinate measuring machine to offset all theoretical detection points along the vector direction of the point or the opposite direction.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the workpiece inspection method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to perform the workpiece inspection method as described in any one of claims 1 to 6.

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