A method for detecting and analyzing surface injection molding defects of automobile exterior parts

Abstract

The present invention belongs to the technical field of surface injection molding defect detection for automobile exterior parts, and relates to a method for detecting and analyzing surface injection molding defects for automobile exterior parts. The present invention analyzes the surface injection molding qualified evaluation coefficients of each type of automobile exterior parts corresponding to each type at each detection period, and timely removes unqualified products to prevent them from entering the subsequent production links, thereby ensuring the quality of surface injection molding of automobile exterior parts, reducing the after-sales costs of automobile manufacturers and dealers, and improving consumers' willingness to buy and brand loyalty. By obtaining each type of automobile exterior parts prone to defects and each type of defect to which they belong, it is helpful to identify and locate the source of problems of each type of automobile exterior parts prone to defects in the production process, improve product quality, reduce production costs, enhance market competitiveness, promote green manufacturing, and contribute to the technological progress and industrial upgrading of the entire automobile industry chain.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile exterior part surface injection molding defect detection, and relates to an automobile exterior part surface injection molding defect detection and analysis method. Background Art

[0002] Automotive exterior parts are related parts that protect, decorate or have opening functions on the outside of the car body. They are independent external accessories that are connected to the car body by bolts, buckles or double-sided adhesive strips. Their main functions are to beautify the appearance of the car body, protect the car body from external damage, and provide safety performance. As consumers' requirements for automobile quality continue to increase, automotive exterior parts are an important part of the vehicle's appearance. The quality of their surface injection molding directly affects the beauty of the entire vehicle, brand image and user satisfaction. Therefore, the quality inspection and analysis system for the injection molding of automotive exterior parts has important significance and role.

[0003] The existing quality inspection and analysis system for the appearance injection molding of automobile exterior trims can basically meet the use requirements, but there are still certain shortcomings: on the one hand, the existing quality inspection and analysis system for the appearance injection molding of automobile exterior trims monitors and analyzes the appearance injection molding of automobile exterior trims, obtains the appearance injection molding defects of automobile exterior trims, and corrects them, but the existing quality inspection and analysis system for the appearance injection molding of automobile exterior trims ignores the delayed manifestation of the appearance injection molding defects of automobile exterior trims, which may occur after a period of storage, transportation or use, and the surface of automobile exterior trims may have problems such as early failure, fading, and cracking, thereby increasing the after-sales costs of automobile manufacturers and dealers and reducing consumers' purchasing willingness and brand loyalty.

[0004] On the other hand, the existing quality inspection and analysis system for automobile exterior trim appearance injection molding obtains the causes of defects of automobile exterior trim parts during the process of monitoring and analyzing the appearance injection molding conditions of automobile exterior trim parts. However, the existing quality inspection and analysis system for automobile exterior trim appearance injection molding ignores further analysis of the defect rate of automobile exterior trim parts to obtain the types of automobile exterior trim parts that are prone to defects and the types of defects that are prone to occur in automobile exterior trim parts. As a result, the production process of automobile exterior trim parts of the types of automobile exterior trim parts that are prone to defects cannot be improved and upgraded in a targeted manner, thereby failing to reduce the scrap rate and improve production efficiency, and failing to reduce the waste of raw materials and improve resource utilization efficiency. Summary of the invention

[0005] In view of this, in order to solve the problems raised in the above background technology, a method for detecting and analyzing injection molding defects on the surface of automobile exterior parts is now proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a method for detecting and analyzing surface injection molding defects of automobile exterior parts, including: S1, surface injection molding basic information detection: detecting the surface injection molding conditions of each type of automobile exterior parts that have just been injection molded, and obtaining the surface injection molding basic information of each type of automobile exterior parts, wherein the surface injection molding basic information includes tiger stripe information, dent information, air spot information, glass fiber precipitation information, burr information and cracking information.

[0007] The tiger stripe information includes the number of alternating light and dark stripes and the width of each alternating light and dark stripe, the dent information includes the number of dents and the depth of each dent, the air spot information includes the number of air spots and the area of ​​each air spot, the glass fiber precipitation information includes the glass fiber precipitation existence index and the glass fiber precipitation area, the burr information includes the burr existence index and the burr existence area, and the cracking information includes the number of cracks and the width of each crack.

[0008] S2. Analysis of basic information of surface injection molding: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim corresponding to each type, and further obtain the qualified automobile exterior trims of each type corresponding to each surface injection molding first inspection.

[0009] S3. Surface injection molding stability test: The surface injection molding conditions of each type of automobile exterior trim parts that have passed the first surface injection molding test are tested at preset intervals to obtain basic surface injection molding information of each type of automobile exterior trim parts that have passed the first surface injection molding test at each test.

[0010] S4. Surface injection molding stability analysis: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim that has passed the first surface injection molding inspection at each inspection, and obtain the surface injection molding qualified automobile exterior trims of each type.

[0011] S5. Surface injection molding defect rate analysis: Analyze the surface injection molding defect rate of each type of corresponding automobile exterior trim, obtain each type of automobile exterior trim that is prone to defects, and display it.

[0012] S6. Defect type defect rate analysis: Analyze the defect rate of each defect type corresponding to each defect-prone automobile exterior trim type, obtain each defect type to which each defect-prone automobile exterior trim type belongs, and display it.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention obtains basic information on surface injection molding of each type of automobile exterior trim and analyzes the surface injection molding qualification assessment coefficient of each type of automobile exterior trim, which helps to timely eliminate unqualified products and prevent them from entering subsequent production links. It also reflects the actual effects of the injection molding process and mold status to a certain extent, which helps production personnel to quickly adjust process parameters or repair molds to prevent further generation and accumulation of defects.

[0014] 2. The present invention obtains basic information of surface injection molding of each type of automobile exterior trim that has passed the first inspection of surface injection molding during each test, analyzes the surface injection molding qualification evaluation coefficients of each type of automobile exterior trim that has passed the first inspection of surface injection molding during each test, fully considers the delayed manifestation of injection molding defects in the appearance of automobile exterior trim, helps to avoid problems such as early failure, fading, cracking, etc. on the surface of automobile exterior trim after a period of storage, transportation or use, ensures the quality of surface injection molding of automobile exterior trim, reduces the after-sales costs of automobile manufacturers and dealers, and improves consumers' purchasing intention and brand loyalty.

[0015] 3. The present invention helps to identify and locate the source of problems in the production process of automobile exterior trim types that are prone to defects by obtaining the types of automobile exterior trim types that are prone to defects and the types of defects that are prone to occur of each type of automobile exterior trim type that are prone to defects. It is also a key link in improving product quality, reducing costs, and enhancing market competitiveness. It is beneficial to promote green manufacturing, respond to the requirements of sustainable development, and contribute to technological progress and industrial upgrading of the entire automobile industry chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram for implementing the method steps of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, the present invention provides a method for detecting and analyzing surface injection molding defects of automobile exterior parts, comprising the following steps: S1, detecting basic information of surface injection molding: detecting the surface injection molding conditions of each type of automobile exterior parts that have just been injection molded, and obtaining basic information of surface injection molding of each type of automobile exterior parts, wherein the basic information of surface injection molding includes tiger stripe information, dent information, air spot information, glass fiber precipitation information, burr information and cracking information.

[0020] It needs to be further explained that the air spots refer to bubble-like areas on the surface of automobile exterior trim.

[0021] The glass fiber precipitation refers to the phenomenon that in a composite material containing glass fibers, glass fibers that should be uniformly dispersed or well wrapped by the matrix are separated from their stable positions in the matrix due to various reasons and are exposed on the surface or inside of the material in a visible or detectable form.

[0022] The burr refers to the tiny and irregular excess material formed on the edge or surface of the workpiece when cutting, stamping, casting, forming and other operations are performed on metal, plastic, ceramic and other materials.

[0023] As a preferred feasible embodiment, the tiger stripe information includes the number of alternating light and dark stripes and the width of each alternating light and dark stripes, the dent information includes the number of dents and the depth of each dent, the air spot information includes the number of air spots and the area of ​​each air spot, the glass fiber precipitation information includes the glass fiber precipitation existence index and the glass fiber precipitation area, the burr information includes the burr existence index and the burr existence area, and the cracking information includes the number of cracks and the width of each crack.

[0024] It needs to be further explained that the specific method of obtaining the number of alternating light and dark stripes and the width of each alternating light and dark stripes is: using three-dimensional scanning technology to scan each type of corresponding automobile exterior trim, obtaining three-dimensional data of each type of corresponding automobile exterior trim, and then constructing a three-dimensional visualization model of each type of corresponding automobile exterior trim.

[0025] The width of each light and dark alternating stripe of each type of automobile exterior trim is directly extracted from the three-dimensional visualization model of each type of automobile exterior trim, and the number of light and dark alternating stripes of each type of automobile exterior trim is obtained by statistics.

[0026] The specific method for obtaining the number of dents and the depth of each dent is: directly extract the dent areas of each type of automobile exterior trim corresponding to each type from the three-dimensional visualization model of each type of automobile exterior trim, and statistically obtain the number of dents of each type of automobile exterior trim corresponding to each type.

[0027] By deploying cameras to shoot each dent area of ​​each type corresponding to each automobile exterior trim, images of each dent area of ​​each type corresponding to each automobile exterior trim are obtained, and further grayscale processing is performed to obtain grayscale images of each dent area of ​​each type corresponding to each automobile exterior trim and the grayscale value corresponding to each pixel therein, from which the pixel points in the grayscale images of each dent area of ​​each type corresponding to each automobile exterior trim with the largest grayscale value are screened and recorded as reference pixel points in the grayscale images of each dent area of ​​each type corresponding to each automobile exterior trim, and the grayscale values ​​of the reference pixel points in the grayscale images of each dent area of ​​each type corresponding to each automobile exterior trim are further matched with the dent depths corresponding to each grayscale value stored in the database to obtain the dent depths of each type corresponding to each automobile exterior trim.

[0028] The specific method for obtaining the number of air spots and the area of ​​each air spot is: directly extract the area of ​​each air spot corresponding to each type of automobile exterior trim from the three-dimensional visualization model of each type of automobile exterior trim, and perform statistics on it to obtain the number of air spots corresponding to each type of automobile exterior trim.

[0029] The specific method for obtaining the glass fiber precipitation existence index and the glass fiber precipitation area is: directly observe the existence of glass fiber precipitation phenomenon of each type of automobile exterior trim from the three-dimensional visualization model of each type of automobile exterior trim; if a certain type of automobile exterior trim has glass fiber precipitation phenomenon, then the glass fiber precipitation existence index of the type of automobile exterior trim is recorded as 1; otherwise, the glass fiber precipitation existence index of the type of automobile exterior trim is recorded as 0, thereby obtaining the glass fiber precipitation existence index of each type of automobile exterior trim.

[0030] The glass fiber precipitation area of ​​each type of automobile exterior trim is directly extracted from the three-dimensional visualization model of each type of automobile exterior trim.

[0031] The specific method for obtaining the burr existence index and the burr existence area is: the specific method for obtaining the glass fiber precipitation existence index and the glass fiber precipitation area is the burr existence index and the burr existence area of ​​each type corresponding to each automobile exterior trim.

[0032] The specific method for obtaining the number of cracks and the width of each crack is: directly extracting the width of each crack corresponding to each type of automobile exterior trim from the three-dimensional visualization model of each type of automobile exterior trim, and statistically analyzing them to obtain the number of cracks corresponding to each type of automobile exterior trim.

[0033] S2. Analysis of basic information of surface injection molding: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim corresponding to each type, and further obtain the qualified automobile exterior trims of each type corresponding to each surface injection molding first inspection.

[0034] As a preferred feasible embodiment, the specific analysis process of the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim is as follows: extracting the tiger pattern information, dent information, air spot information, glass fiber precipitation information, burr information and cracking information of each type of automobile exterior trim, analyzing the tiger pattern defect index, dent defect index, air spot defect index, glass fiber precipitation defect index, burr defect index and cracking defect index of each type of automobile exterior trim, respectively. ,in , For each type of number, , It is the number of each automobile exterior part.

[0035] Analysis of the surface injection molding qualification evaluation coefficients for each type of automotive exterior parts ,in is the floor function symbol, is a natural constant.

[0036] As a preferred feasible embodiment, the specific process of obtaining the automobile exterior trim of each type corresponding to each surface injection molding inspection is: comparing the surface injection molding qualification assessment coefficient of each type corresponding to each automobile exterior trim with the set surface injection molding qualification assessment coefficient threshold value; if the surface injection molding qualification assessment coefficient of a certain type corresponding to a certain automobile exterior trim is greater than the set surface injection molding qualification assessment coefficient threshold value, then the automobile exterior trim corresponding to this type is recorded as the automobile exterior trim of this type that passes the surface injection molding inspection; otherwise, the automobile exterior trim of this type is recorded as the automobile exterior trim of this type that fails the surface injection molding inspection.

[0037] Then, qualified automobile exterior parts corresponding to each type and surface of the injection molding can be obtained.

[0038] It needs to be further explained that after obtaining each type of unqualified automobile exterior parts corresponding to each surface injection molding inspection, they are discarded to prevent them from entering the subsequent production links, thereby improving the overall production efficiency and reducing production costs.

[0039] As a preferred feasible embodiment, the specific analysis process of the tiger pattern defect index, dent defect index, air spot defect index and crack defect index of each type of automobile exterior trim is as follows: extract the number of light and dark alternating stripes and the width of each light and dark alternating stripe of each type of automobile exterior trim, and record them as ,in, , The number of each light and dark alternating stripe is used to analyze the tiger stripe defect index of each type of automotive exterior trim. ,in The width of the alternating light and dark stripes allowed on a given automotive exterior trim.

[0040] Similarly, the dent defect index of each type of automobile exterior parts can be obtained: , Gas spot defect index and cracking defect index .

[0041] As a preferred feasible embodiment, the specific analysis process of the glass fiber precipitation defect index and burr defect index of each type of automobile exterior parts is as follows: extract the glass fiber precipitation existence index and glass fiber precipitation area of ​​each type of automobile exterior parts, respectively recorded as , analyze the glass fiber precipitation defect index of each type of automotive exterior parts ,in The glass fiber precipitation area allowed for the specified automotive exterior parts.

[0042] Similarly, the burr defect index of each type of automotive exterior parts can be obtained. .

[0043] The present invention obtains basic information on surface injection molding of each type of automobile exterior trim and analyzes the surface injection molding qualification assessment coefficient of each type of automobile exterior trim, which helps to timely eliminate unqualified products and prevent them from entering subsequent production links. It also reflects the actual effects of the injection molding process and the mold status to a certain extent, which helps production personnel to quickly adjust process parameters or repair the mold to prevent further generation and accumulation of defects.

[0044] S3. Surface injection molding stability test: The surface injection molding conditions of each type of automobile exterior trim parts that have passed the first surface injection molding test are tested at preset intervals to obtain basic surface injection molding information of each type of automobile exterior trim parts that have passed the first surface injection molding test at each test.

[0045] As a specific feasible embodiment, the preset interval time periods may be 24 hours, 72 hours and 128 hours respectively.

[0046] S4. Surface injection molding stability analysis: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim that has passed the first surface injection molding inspection at each inspection, and obtain the surface injection molding qualified automobile exterior trims of each type.

[0047] As a preferred feasible embodiment, the specific analysis process of the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim that corresponds to each surface injection molding inspection and passes each inspection is: extracting the surface injection molding basic information of each type of automobile exterior trim that corresponds to each surface injection molding inspection and passes each inspection, and according to the analysis process of the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim that corresponds to each type, the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim that corresponds to each surface injection molding inspection and passes each inspection can be obtained by the same token.

[0048] If the surface injection molding qualified evaluation coefficient of a certain type of automobile exterior trim corresponding to a certain surface injection molding first inspection is 1 during the first inspection, then the type of automobile exterior trim corresponding to the surface injection molding first inspection qualified automobile exterior trim of the same type is recorded as the type of automobile exterior trim corresponding to the surface injection molding second inspection qualified automobile exterior trim of the same type. Similarly, the type of automobile exterior trim corresponding to the surface injection molding second inspection qualified automobile exterior trim can be obtained. Qualified automotive exterior parts, if the type corresponds to the surface injection molding - qualified automotive exterior parts are the type corresponding to the surface injection molding If the automobile exterior trim is qualified by inspection, the automobile exterior trim of the type corresponding to the surface injection molding inspection is recorded as the automobile exterior trim of the type corresponding to the injection molding qualified by inspection, wherein is the number of detections.

[0049] Thus, qualified automobile exterior parts corresponding to each type of injection molding are obtained.

[0050] It needs to be further explained that when obtaining each type of corresponding surface injection After inspecting unqualified automotive exterior parts, they will be removed to prevent them from entering subsequent production links, thereby improving overall production efficiency and reducing production costs.

[0051] The present invention obtains basic information on surface injection molding of each type of automobile exterior trim that has passed each surface injection molding inspection during each inspection, analyzes the surface injection molding qualification evaluation coefficients of each type of automobile exterior trim that has passed each surface injection molding inspection during each inspection, fully considers the delayed manifestation of injection molding defects on the appearance of automobile exterior trim, helps to avoid problems such as early failure, fading, cracking, etc. on the surface of automobile exterior trim after a period of storage, transportation or use, ensures the quality of surface injection molding of automobile exterior trim, reduces the after-sales costs of automobile manufacturers and dealers, and improves consumers' purchasing intention and brand loyalty.

[0052] S5. Surface injection molding defect rate analysis: Analyze the surface injection molding defect rate of each type of corresponding automobile exterior trim, obtain each type of automobile exterior trim that is prone to defects, and display it.

[0053] As a preferred feasible embodiment, the specific analysis process of the surface injection molding defect rate of each type of corresponding automobile exterior parts is: extract each type of corresponding automobile exterior parts and each type of corresponding injection molding qualified automobile exterior parts, count the number of each type of corresponding automobile exterior parts and the number of each type of corresponding injection molding qualified automobile exterior parts, and record them as , analyze the surface injection molding defect rate of each type of corresponding automotive exterior parts .

[0054] The surface injection molding defect rates of the corresponding automobile exterior parts of each type are compared with the set surface injection molding defect rate thresholds, and the corresponding automobile exterior parts of each type whose surface injection molding defect rates are greater than the set surface injection molding defect rate thresholds are screened out and recorded as the types of automobile exterior parts prone to defects.

[0055] S6. Defect type defect rate analysis: Analyze the defect rate of each defect type corresponding to each defect-prone automobile exterior trim type, obtain each defect type to which each defect-prone automobile exterior trim type belongs, and display it.

[0056] As a preferred feasible embodiment, the specific analysis process of the defect rate of each defect type of the automobile exterior trim corresponding to each defect type of the automobile exterior trim is as follows: the number of automobile exterior trims with each defect type in the automobile exterior trim corresponding to each defect type is obtained, recorded as ,in , is the number of each type of automotive exterior parts that are prone to defects. , Number each defect type, and analyze the defect rate of each defect type of each type of automobile exterior trim that is prone to defects ,in is the first number extracted from the number of corresponding automobile exterior parts of each type. The number of automobile exterior parts corresponding to the types of automobile exterior parts prone to defects, The first number of qualified injection molded automotive exterior parts extracted from each type The number of qualified injection molded automobile exterior parts corresponds to the type of automobile exterior parts that are prone to defects.

[0057] It needs to be further explained that the various defect types are tiger skin defect, dent defect, air spot defect, glass fiber precipitation defect, burr defect and crack defect, and their corresponding numbers are 1 for tiger skin defect, 2 for dent defect, 3 for air spot defect, 4 for glass fiber precipitation defect, 5 for burr defect and 6 for crack defect.

[0058] The defect rates of each defect type of automobile exterior trim corresponding to each defect-prone automobile exterior trim type are compared with the set defect rate threshold of the defect type respectively, and the defect types of automobile exterior trim corresponding to each defect-prone automobile exterior trim type whose defect rates of the defect types are greater than the set defect rate threshold of the defect type are screened out, and they are recorded as each defect type of automobile exterior trim corresponding to each defect-prone automobile exterior trim type.

[0059] As a preferred feasible embodiment, the process of obtaining the number of automobile exterior trims with each defect type corresponding to each type of automobile exterior trim that is prone to defects is as follows: according to the analysis formula Get the first The type of automobile exterior parts prone to defects corresponds to Evaluation coefficient of tiger skin defect in automobile exterior parts that failed the first inspection of surface injection molding ,in For the The type of automobile exterior parts prone to defects corresponds to Tiger skin defect index of unqualified automotive exterior parts in surface injection molding inspection, , The number of each surface injection molding unqualified automobile exterior parts. , then it indicates The type of automobile exterior parts prone to defects corresponds to The surface injection molding failed the first inspection. The automotive exterior parts do not have tiger skin defects. , then it indicates The type of automobile exterior parts prone to defects corresponds to The number of automobile exterior trim parts that failed the first inspection of surface injection molding and had tiger skin pattern defects was counted, and the number of automobile exterior trim parts with tiger skin pattern defects among the automobile exterior trim parts that failed the first inspection of surface injection molding for each type of automobile exterior trim parts prone to defects was counted.

[0060] Similarly, the corresponding surface injection molding of each type of automobile exterior parts prone to defects can be obtained. The number of automobile exterior parts with tiger skin defects, dent defects, air spot defects, glass fiber precipitation defects, burr defects and cracking defects among the unqualified automobile exterior parts is recorded as the number of automobile exterior parts with defects corresponding to each surface injection molding The number of automobile exterior trims with each defect type among the unqualified automobile exterior trims is checked, and they are classified according to the defect type to obtain the number of automobile exterior trims with each defect type corresponding to each type of automobile exterior trim that is prone to defects.

[0061] It should be further explained that the specific classification method for classifying the defect types according to the defect types to obtain the number of automobile exterior trims with each defect type in the corresponding automobile exterior trims is: respectively counting the number of automobile exterior trims with each defect type corresponding to each surface injection molding The number of automobile exterior parts with tiger skin defects among the unqualified automobile exterior parts is then accumulated to obtain the corresponding surface injection molding inspection data of each type of automobile exterior part prone to defects. The total number of automobile exterior trims with tiger skin pattern defects among the unqualified automobile exterior trims is inspected and recorded as the number of automobile exterior trims with tiger skin pattern defects corresponding to each defective automobile exterior trim type. Similarly, the number of automobile exterior trims with dent defects, air spot defects, glass fiber precipitation defects, burr defects and cracking defects corresponding to each defective automobile exterior trim type can be obtained, which are then collectively referred to as the number of automobile exterior trims with each defect type corresponding to each defective automobile exterior trim type.

[0062] The present invention helps to identify and locate the source of problems in the production process of automobile exterior trim types that are prone to defects by obtaining the types of automobile exterior trim types that are prone to defects and the types of defects that are prone to occur of each type of automobile exterior trim type that are prone to defects. It is also a key link in improving product quality, reducing costs, and enhancing market competitiveness. It is beneficial to promote green manufacturing, respond to the requirements of sustainable development, and contribute to technological progress and industrial upgrading of the entire automobile industry chain.

[0063] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for detecting and analyzing injection molding defects on the surface of automobile exterior parts. Features: include: S1. Detection of basic information of surface injection molding: Detect the surface injection molding conditions of each type of automobile exterior trim that has just been injection molded, and obtain basic information of surface injection molding of each type of automobile exterior trim, wherein the basic information of surface injection molding includes tiger stripe information, dent information, air spot information, glass fiber precipitation information, burr information and cracking information; S2. Analysis of basic information of surface injection molding: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim, and further obtain the qualified automobile exterior trims of each type corresponding to each surface injection molding first inspection; S3. Surface injection molding stability test: Detect the surface injection molding conditions of each type of automobile exterior trim that has passed the surface injection molding first inspection at each preset interval time period, and obtain the surface injection molding basic information of each type of automobile exterior trim that has passed the surface injection molding first inspection at each test; S4. Surface injection molding stability analysis: Analyze the surface injection molding qualified evaluation coefficients of each type of automobile exterior trim corresponding to each surface injection molding first inspection qualified automobile exterior trim in each inspection, and obtain each type of automobile exterior trim corresponding to each injection molding qualified automobile exterior trim; S5. Surface injection molding defect rate analysis: Analyze the surface injection molding defect rate of each type of corresponding automobile exterior trim, obtain each type of automobile exterior trim that is prone to defects, and display it; S6. Defect type defect rate analysis: analyzing the defect rate of each defect type of each defect type of each defect prone automobile exterior trim type corresponding to the defect prone automobile exterior trim type, obtaining each defect type prone to each defect prone automobile exterior trim type and displaying it; The specific analysis process of the surface injection molding qualification evaluation coefficients of each type of automotive exterior parts is as follows: The tiger pattern information, dent information, air spot information, glass fiber precipitation information, burr information and cracking information of each type of automobile exterior trim are extracted, and the tiger pattern defect index, dent defect index, air spot defect index, glass fiber precipitation defect index, burr defect index and cracking defect index of each type of automobile exterior trim are analyzed and recorded as ,in , For each type of number, , The serial number of each automobile exterior trim; Analysis of the surface injection molding qualification evaluation coefficients for each type of automotive exterior parts ,in is the floor function symbol, is a natural constant; The specific analysis process of the tiger pattern defect index, dent defect index, air spot defect index and crack defect index of each type of automobile exterior trim is as follows: The number of alternating light and dark stripes and the width of each alternating light and dark stripe corresponding to each type of automobile exterior trim are extracted and recorded as ,in, , The number of each light and dark alternating stripe is used to analyze the tiger stripe defect index of each type of automotive exterior trim. ,in The width of the alternating light and dark stripes allowed on the specified automotive exterior trim; Similarly, the dent defect index of each type of automobile exterior parts can be obtained: , Gas spot defect index and cracking defect index ; The specific analysis process of the glass fiber precipitation defect index and burr defect index of each type of automobile exterior parts is as follows: The glass fiber precipitation existence index and glass fiber precipitation area of ​​each type of automobile exterior parts are extracted and recorded as , analyze the glass fiber precipitation defect index of each type of automotive exterior parts ,in The glass fiber precipitation area allowed for the set automobile exterior parts; Similarly, the burr defect index of each type of automotive exterior parts can be obtained. .

2. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 1, Features: The tiger stripe information includes the number of alternating light and dark stripes and the width of each alternating light and dark stripe, the dent information includes the number of dents and the depth of each dent, the air spot information includes the number of air spots and the area of ​​each air spot, the glass fiber precipitation information includes the glass fiber precipitation existence index and the glass fiber precipitation area, the burr information includes the burr existence index and the burr existence area, and the cracking information includes the number of cracks and the width of each crack.

3. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 1, Features: The specific process of obtaining qualified automobile exterior parts corresponding to each type of surface injection molding inspection is as follows: The surface injection molding qualified evaluation coefficients of each type of automobile exterior trim are respectively compared with the set surface injection molding qualified evaluation coefficient thresholds. If the surface injection molding qualified evaluation coefficient of a certain type of automobile exterior trim is greater than the set surface injection molding qualified evaluation coefficient threshold, the automobile exterior trim of this type is recorded as a qualified automobile exterior trim of this type corresponding to the surface injection molding first inspection; otherwise, the automobile exterior trim of this type is recorded as an unqualified automobile exterior trim of this type corresponding to the surface injection molding first inspection; Then, qualified automobile exterior parts corresponding to each type and surface of the injection molding can be obtained.

4. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 3, Features: The specific analysis process of the surface injection molding qualified evaluation coefficient of each type of automobile exterior parts corresponding to each surface injection molding first inspection in each inspection is as follows: Extract the basic information of surface injection molding of each type of automobile exterior trim that has passed the first surface injection molding inspection at each test. According to the analysis process of the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim, the surface injection molding qualified evaluation coefficient of each type of automobile exterior trim that has passed the first surface injection molding inspection at each test can be obtained by the same method. If the surface injection molding qualified evaluation coefficient of a certain type of automobile exterior trim corresponding to a certain surface injection molding first inspection is 1 during the first inspection, then the type of automobile exterior trim corresponding to the surface injection molding first inspection qualified automobile exterior trim of the same type is recorded as the type of automobile exterior trim corresponding to the surface injection molding second inspection qualified automobile exterior trim of the same type. Similarly, the type of automobile exterior trim corresponding to the surface injection molding second inspection qualified automobile exterior trim can be obtained. Qualified automotive exterior parts, if the type corresponds to the surface injection molding - qualified automotive exterior parts are the type corresponding to the surface injection molding If the automobile exterior trim is qualified by inspection, the automobile exterior trim of the type corresponding to the surface injection molding inspection is recorded as the automobile exterior trim of the type corresponding to the injection molding qualified by inspection, wherein is the number of tests; Thus, qualified automobile exterior parts corresponding to each type of injection molding are obtained.

5. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 4, Features: The specific analysis process of the surface injection molding defect rate of each type of automobile exterior parts is as follows: Extract each type of automobile exterior trim and each type of qualified injection molding automobile exterior trim, count the number of each type of automobile exterior trim and each type of qualified injection molding automobile exterior trim, and record them as , analyze the surface injection molding defect rate of each type of corresponding automotive exterior parts ; The surface injection molding defect rates of the corresponding automobile exterior parts of each type are compared with the set surface injection molding defect rate thresholds, and the corresponding automobile exterior parts of each type whose surface injection molding defect rates are greater than the set surface injection molding defect rate thresholds are screened out and recorded as the types of automobile exterior parts prone to defects.

6. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 5, Features: The specific analysis process of the defect rate of each defect type of the automobile exterior trim type that is prone to defects corresponding to the automobile exterior trim type is as follows: Get the number of automobile exterior parts with each defect type in each type of automobile exterior parts corresponding to each defect-prone automobile exterior part, recorded as ,in , is the number of each type of automotive exterior parts that are prone to defects. , Number each defect type, and analyze the defect rate of each defect type of each type of automobile exterior trim that is prone to defects ,in is the first number extracted from the number of corresponding automobile exterior parts of each type. The number of automobile exterior parts corresponding to the types of automobile exterior parts prone to defects, The first number of qualified injection molded automotive exterior parts extracted from each type The number of qualified injection molded automobile exterior trim parts corresponding to each type of defective automobile exterior trim parts; The defect rates of each defect type of automobile exterior trim corresponding to each defect-prone automobile exterior trim type are compared with the set defect rate threshold of the defect type respectively, and the defect types of automobile exterior trim corresponding to each defect-prone automobile exterior trim type whose defect rates of the defect types are greater than the set defect rate threshold of the defect type are screened out, and they are recorded as each defect type of automobile exterior trim corresponding to each defect-prone automobile exterior trim type.

7. A method for detecting and analyzing surface injection molding defects of automobile exterior parts according to claim 6, Features: The process of obtaining the number of automobile exterior trims with each defect type corresponding to each type of automobile exterior trim that is prone to defects is as follows: According to the analytical formula Get the first The type of automobile exterior parts prone to defects corresponds to Evaluation coefficient of tiger skin defect in automobile exterior parts that failed the first inspection of surface injection molding ,in For the The type of automobile exterior parts prone to defects corresponds to Tiger skin defect index of unqualified automotive exterior parts in surface injection molding inspection, , The number of each surface injection molding unqualified automobile exterior parts. , then it indicates The type of automobile exterior parts prone to defects corresponds to The surface injection molding failed the first inspection. The automotive exterior parts do not have tiger skin defects. , then it indicates The type of automobile exterior parts prone to defects corresponds to The number of automobile exterior parts that failed the first-time injection molding inspection and had tiger-skin pattern defects was counted, and the number of automobile exterior parts with tiger-skin pattern defects among the automobile exterior parts that failed the first-time injection molding inspection and had each type of automobile exterior parts prone to defects was counted; Similarly, the corresponding surface injection molding of each type of automobile exterior parts prone to defects can be obtained. The number of automobile exterior parts with tiger skin defects, dent defects, air spot defects, glass fiber precipitation defects, burr defects and cracking defects among the unqualified automobile exterior parts is recorded as the number of automobile exterior parts with defects corresponding to each surface injection molding The number of automobile exterior trims with each defect type among the unqualified automobile exterior trims is checked, and they are classified according to the defect type to obtain the number of automobile exterior trims with each defect type corresponding to each type of automobile exterior trim that is prone to defects.

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