Molding glue size evaluation method and system

Abstract

The invention relates to a molding glue size evaluation method and system, and aims to improve the size precision and quality control of a molding glue part. The system achieves automatic and objective evaluation of a molded rubber part by establishing a molded rubber contour standard, setting a tolerance range of control items and presetting a centesimal system qualified score line, the actual contour size obtained by a laser scanner is compared with the standard contour, the score of each control item is obtained, and the control accuracy of the molded rubber part is improved. And S2, calculating a final score, comparing the final score with the score line set in S2 to determine the treatment mode of the molded rubber part, and setting a one-ticket override specified value to ensure the key quality. The evaluation system not only improves the production efficiency and the product quality, but also ensures the traceability of data, and provides reliable quality assurance for the manufacturing of molded rubber parts.

Description

Technical Field

[0001] The present invention relates to the technical field of sizing evaluation of shaped rubber, and particularly relates to a method and a system for sizing evaluation of shaped rubber. Background Art

[0002] Shaped rubber refers to shaped rubber components such as tread, shoulder pad, sidewall, and chafer that meet the requirements of standard size, weight, and corresponding rubber number types, and belong to pure rubber components for tires.

[0003] The tread refers to the outer tire rubber layer above the buffer layer or belt layer at the crown part of the tire. The tread width affects the contact area between the tire and the ground, thereby affecting the grip and stability.

[0004] The shoulder pad of the tire, also known as the shoulder pad rubber, is an important part provided on both sides of the belt layer of the radial tire. Its main function is to protect the belt layer, ensure the flatness of the steel belt layer, and prevent the belt layer from falling off during driving. At the same time, the shoulder pad rubber can also transfer and absorb the stress concentrated on the shoulder part under dynamic conditions. Therefore, the size and material of the shoulder pad need to be able to withstand the stress concentration during high-speed driving, protect the belt layer, and ensure the durability of the tire.

[0005] The sidewall of the tire is the side edge part of the tire. It not only protects the tire from impacts on the shoulder, etc., but also carries important information such as the model, specification, aspect ratio, load index, and speed rating of the tire. The size of the sidewall, including its height and thickness, affects the buffering performance and comfort of the tire. The thicker the sidewall, the stronger the buffering ability of the tire and the higher the comfort. The height of the sidewall, that is, the aspect ratio, affects the appearance and performance of the tire. The larger the aspect ratio, the thicker the tire sidewall, the more air stored inside, and the stronger the buffering ability.

[0006] The chafer is an important part of the tire. It is located at the bead part and mainly plays a role in support and transition. The size and hardness of the chafer affect the rigidity and durability of the tire. The design of the chafer core needs to ensure the stability of the tire and at the same time provide sufficient buffering and shock absorption performance.

[0007] The process requirements stipulate that each batch of shaped rubber components produced must be scanned to confirm whether the size meets the standards. Therefore, the invention team proposes a method and a system for sizing evaluation of shaped rubber. Summary of the Invention

[0008] The purpose of the present invention is to provide a method and a system for sizing evaluation of shaped rubber.

[0009] On the one hand, the present invention provides a method for sizing evaluation of shaped rubber, including the following steps:

[0010] S1 Establish a standard for the shaped rubber profile according to the requirements of the construction table, and set the tolerance range of the control items;

[0011] S2 Preset the passing percentage score line of the profile of the shaped rubber according to the product and quality requirements;

[0012] S3 Set the score for each control item according to the product and quality requirements. If the tolerance range of the control item set in S1 is not exceeded, a score is obtained; if the tolerance range of the control item is exceeded, a score of 0 is recorded. The total score calculated from the scores of each control item of each shaped rubber product is the theoretical total score;

[0013] S4 Set the one-vote veto specified value for each control item according to the product and quality requirements. If a single item exceeds the one-vote veto specified value, it is directly evaluated as unqualified and prohibited from use;

[0014] S5 Obtain the actual profile dimensions of the shaped rubber part to be measured through a laser scanner;

[0015] S6 Extract the corresponding control items from the actual profile dimensions of the shaped rubber part to be measured obtained in S5 with reference to the standard profile established in S1, and compare them with the control items of the standard profile to obtain the score of each control item;

[0016] S7 Add up the scores of all control items of the actual profile, convert to the final score of the percentage system item, and compare it with the score line set in S2. Dispose of the actual part according to the product, process requirements and rules.

[0017] Further, the construction table described in S1 includes the tread shaped rubber construction table, the shoulder pad shaped rubber construction table, the apex shaped rubber construction table, and the sidewall shaped rubber construction table.

[0018] Further, the establishment of the shaped rubber profile standard according to the requirements of the construction table described in S1 is specifically to use scanning software to generate rated profiles respectively, input standard dimensions, and establish the shaped rubber profile standard.

[0019] Further, the control items described in S1 include: average thickness difference: used to evaluate the average deviation amount between the actual scanning curve and the standard curve of a certain transition section; thickness symmetry of each section of the crown: used to evaluate the average deviation amount between the actual scanning curves of the left and right sections within the crown; thickness of each point of the crown: the thickness of each inflection point within the crown width; wing thickness: the inflection point adjacent to the edge thickness, scored independently of the thickness of each point of the crown; cumulative width of the crown section exceeding the tolerance: the cumulative width of the area exceeding the thickness tolerance in a certain transition section within the crown width; cumulative width of the wing transition section exceeding the tolerance: the cumulative width of the area exceeding the thickness tolerance in the transition section between the outer crown width point and the wing thickness point; cumulative width of the edge transition section exceeding the tolerance: the cumulative width of the area exceeding the thickness tolerance in the transition section between the wing thickness point and the edge thickness point.

[0020] Further, for the average thickness difference used to evaluate the average deviation amount between the actual scanning curve and the standard curve of a certain transition section, its calculation formula is:

[0021] Average thickness difference = (Sx实 -(H x标 +H (x+1)标 )×L x实 ÷2)÷L x实 ;

[0022] Wherein, S x实 is the actual cross-sectional area of the figure enclosed between points x and x + 1, H x标 is the standard thickness at point x, H (x+1)标 is: the standard thickness at point x + 1, × is the point number on the construction sheet, L x实 is the actual width in the X direction between points x and x + 1, X is the point number on the construction sheet;

[0023] The thickness symmetry of each section of the tread for evaluating the average deviation of the actual scan curves of the left and right sections within the tread is calculated by the formula:

[0024] Tread thickness symmetry of each section = (S x实 - S’ x实 ) ÷ MIN(L x实 , L’ x实 );

[0025] Since the widths of the left and right symmetric sections may be inconsistent, which may lead to distortion of thickness symmetry, when calculating the actual cross-sectional area, align the outer inflection points of this section and discard the area corresponding to the actual curve of the inner part with wider width.

[0026] Wherein, S x实 is the actual cross-sectional area of the figure enclosed between points x and x + 1, S’ x实 is the actual cross-sectional area of the figure enclosed between points x’ and (x + 1)’, L x实 is the actual width in the X direction between points x and x + 1, L’ x实 is the actual width in the X direction between points x’ and (x + 1)’, X is the point on the construction sheet.

[0027] Furthermore, the S2 set type rubber profile percentage score line includes a first preset score line, a second preset score line, and a third preset score line, and the first preset score line > the second preset score line > the third preset score line.

[0028] Furthermore, the S3 sets the score for each control item according to product and quality requirements. Specifically, the score is formulated according to hierarchical increment. Items of the first-level importance are 2 points, items of the second-level importance are 3 points, and items of the third-level importance are 5 points, and finally a comprehensive score of the type rubber size is carried out.

[0029] Furthermore, S7 adds up the scores of all control items of the actual profile and converts them into the final score of the percentage system items, and its conversion formula is:

[0030] The final score of the project = (actual score / total theoretical score) * 100.

[0031] Further, the final score of the project in S7 is compared with the cut-off score set in S2, and according to the product and process requirements and rules, the actual components are disposed of. Specifically,

[0032] If the final score of the project is higher than the first preset cut-off score, it is normally put into use:

[0033] If the final score of the project is lower than the second preset cut-off score, it is necessary to adjust the mouth shape of the tooling and adjust the process parameters, and the shaped rubber is used with concessions;

[0034] If the final score of the project is lower than the third preset cut-off score, the shaped rubber components shall be prohibited from being used and sent back to the furnace, and the technical department shall be notified to analyze the reasons for adjustment.

[0035] On the other hand, the present invention provides a system used for a method of evaluating the size of shaped rubber, including the following modules:

[0036] A standard parameter establishment module, which is used to establish the standard size profile of the shaped rubber, set the tolerances of the control items, and set the cut-off scores on a percentage basis;

[0037] A two-dimensional laser scanning module, which is used to obtain the two-dimensional profile data of the shaped rubber component to be measured;

[0038] A centering module, which is used to align the measured profile data of the shaped rubber component with the standard size profile according to the preset center point position;

[0039] A comparison and evaluation module, which is used to compare and score and evaluate the measured size profile of the shaped rubber;

[0040] An output module, which is used to output the evaluation score and the judgment result;

[0041] A data storage module, which is used to store the established standard parameters, store the evaluation score and the judgment result.

[0042] The beneficial effects of the present invention are as follows:

[0043] 1. The present invention uses a laser scanner to obtain the actual profile dimensions of the shaped rubber component, which can provide high-precision measurement results, ensure the accuracy of the evaluation system, automate the evaluation process, reduce manual intervention, improve efficiency, and the data obtained by the laser scanner can be archived, which is convenient for traceability and comparative analysis, and helps to continuously improve the product quality.

[0044] 2. The present invention evaluates the process based on the preset standard profile and the tolerance range of the control items, and the evaluation process is data-based, which helps to make scientific decisions based on data and improve the product quality.

[0045] 3. The evaluation system of the present invention covers all key control items, ensuring comprehensive quality control of the shaped rubber components. At the same time, different passing percentage scores and one-vote veto specified values can be preset according to different products and quality requirements, making the evaluation system have good adaptability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is the flowchart of the shaped rubber size evaluation method in Embodiment 1 of the present invention;

[0047] Figure 2 is the scoring item setting interface of the tread shaped rubber in Embodiment 1 of the present invention;

[0048] Figure 3 is the one-vote veto item setting interface of the tread shaped rubber in Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] The present invention will be described in detail below with reference to the drawings and specific embodiments. Here, the illustrative embodiments of the present invention and the description are used to explain the present invention, but not to limit the present invention.

[0050] Embodiment 1

[0051] Please refer to Figure 1 as shown, a shaped rubber size evaluation method and system.

[0052] On the one hand, the present invention provides a shaped rubber size evaluation method, including the following steps:

[0053] S1 Establish a shaped rubber profile standard according to the requirements of the construction table and set the tolerance range of the control items;

[0054] The construction table includes the tread shaped rubber construction table, the shoulder pad shaped rubber construction table, the triangular rubber shaped rubber construction table, and the sidewall shaped rubber construction table. Establishing a shaped rubber profile standard according to the requirements of the construction table specifically means using scanning software to generate rated profiles respectively, inputting standard dimensions, and establishing a shaped rubber profile standard.

[0055] The control items include:

[0056] Average thickness difference: used to evaluate the average deviation amount between the actual scanning curve and the standard curve of a certain transition section;

[0057] Thickness symmetry of each section of the tread crown: used to evaluate the average deviation amount between the actual scanning curves of the left and right sections within the tread crown;

[0058] Thickness of each point on the tread crown: the thickness of each inflection point within the crown width;

[0059] Flange thickness: the inflection point adjacent to the edge thickness, scored independently of the thickness of each point on the tread crown;

[0060] Accumulative width of each section of the tread crown exceeding the tolerance: The accumulative width of a certain transition section within the crown width that exceeds the thickness tolerance area;

[0061] Accumulative width of the wing transition section exceeding the tolerance: The accumulative width of the transition section between the outer point of the crown width and the wing thickness point that exceeds the thickness tolerance area;

[0062] Accumulative width of the side transition section exceeding the tolerance: The accumulative width of the transition section between the wing thickness point and the side thickness point that exceeds the thickness tolerance area;

[0063] The average thickness difference used to evaluate the average deviation between the actual scan curve and the standard curve of a certain transition section is calculated by the following formula:

[0064] Average thickness difference = (S x实 - (H x标 + H (x+1)标 ) × L x实 ÷ 2) ÷ L x实 ;

[0065] Wherein, S x实 is the actual cross-sectional area of the figure enclosed between point x and point x + 1, H x标 is the standard thickness at point x, H (x+1)标 is: the standard thickness at point x + 1, × is the point number on the construction drawing, L x实 is the actual width in the X direction between point x and point x + 1, X is the point number on the construction drawing;

[0066] The tread crown section thickness symmetry used to evaluate the average deviation between the actual scan curves of the left and right sections within the tread crown is calculated by the following formula:

[0067] Tread crown section thickness symmetry = (S x实 - S' x实 ) ÷ MIN(L x实 , L' x实 );

[0068] Since the widths of the left and right symmetric sections may be inconsistent, which may lead to distortion of the thickness symmetry, when calculating the actual cross-sectional area, align the outer inflection points of this section and discard the area corresponding to the actual curve of the inner over-wide part.

[0069] Wherein, S x实 is the actual cross-sectional area of the figure enclosed between point x and point x + 1, S' x实 is the actual cross-sectional area of the figure enclosed between point x' and point (x + 1)', L x实 is the actual width in the X direction between point x and point x + 1, L' x实 is the actual width in the X direction between point x' and point (x + 1)', X is the point on the construction drawing.

[0070] S2 Preset the passing percentage score line for the profile of the shaped rubber according to the product and quality requirements;

[0071] S3 Set the scores for each control item according to the product and quality requirements. If the tolerance range of the control item set in S1 is not exceeded, points are scored; if the tolerance range of the control item is exceeded, 0 points are recorded. The total score calculated for each control item of each shaped rubber product is the theoretical total score; the scores are formulated according to the level increase. The items of the first-level importance are 2 points, the items of the second-level importance are 3 points, and the items of the third-level importance are 5 points. Finally, a comprehensive score is given to the size of the shaped rubber;

[0072] Table 1 Scoring Table for the Evaluation of the Size of the Shaped Rubber

[0073]

[0074]

[0075]

[0076] S4 Set the one-vote veto specified value for each control item according to the product and quality requirements. If a single item exceeds the one-vote veto specified value, it is directly evaluated as unqualified and disabled;

[0077] S5 Obtain the actual profile size of the shaped rubber component to be measured through a laser scanner;

[0078] S6 Extract the corresponding control items from the actual profile size of the shaped rubber component to be measured obtained in S5 with reference to the standard profile established in S1, and compare them with the control items of the standard profile to obtain the score of each control item;

[0079] S7 Add up the scores of all control items of the actual profile, convert to the final score of the percentage system item, and compare it with the score line set in S2. Dispose of the actual component according to the product, process requirements and rules;

[0080] The conversion formula for the final score of the percentage system item is:

[0081] The final score of the item = (actual score / theoretical total score) * 100.

[0082] Compare the final score of the item with the score line set in S2. Dispose of the actual component according to the product, process requirements and rules. Specifically,

[0083] If the final score of the item is higher than the first preset score line, it is normally released for use;

[0084] If the final score of the item is lower than the second preset score line, it is necessary to adjust the tooling die and the process parameters, and the shaped rubber is used with concessions;

[0085] If the final score of the project is lower than the third preset score line, the rubber parts shall be prohibited from use and sent back to the furnace, and the technical department shall be notified to analyze the reasons and make adjustments.

[0086] The first preset score line > the second preset score line > the third preset score line.

[0087] Embodiment 2

[0088] A system used for a rubber size evaluation method, the modules of which include a standard parameter establishment module, a two-dimensional laser scanning module, a centering module, a comparison and evaluation module, and an output module.

[0089] It includes a standard parameter establishment module, a two-dimensional laser scanning module, a centering module, a comparison and evaluation module, an output module, and a data storage module;

[0090] The standard parameter establishment module is used to establish the standard size profile of the rubber, set the tolerance of the control items, and set the percentage score line;

[0091] The two-dimensional laser scanning module is used to obtain the two-dimensional profile data of the rubber part to be measured;

[0092] The centering module is used to align the measured profile data of the rubber part with the standard size profile according to the preset center point position;

[0093] The comparison and evaluation module is used to compare and score the measured size profile of the rubber;

[0094] The output module is used to output the evaluation score and the judgment result;

[0095] The data storage module is used to store the established standard parameters, the evaluation score, and the judgment result.

[0096] The steps for using the rubber size evaluation system are as follows:

[0097] ① Establish the standard size profile of the rubber through the standard parameter establishment module;

[0098] ② Obtain the two-dimensional profile data of the rubber part to be measured through the two-dimensional laser scanning module;

[0099] ③ Through the centering module, align the measured profile data of the rubber part with the standard size profile according to the preset center point position;

[0100] ④ Compare and score the measured size profile of the rubber through the comparison module according to the preset rules;

[0101] ⑤ Output the evaluation score and the judgment result in a predetermined format through the output module;

[0102] ⑥ Store the established standard parameters through the data storage module, and trace the evaluation score and the judgment result.

[0103] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made based on the present invention, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. A method for evaluating the size of a molded rubber, characterized in that: The following steps are involved: S1 Establish the profile standard of the rubber profile according to the requirements of the construction table, and set the tolerance range of each control item of the rubber profile; S2 sets the percentage score line for the rubber profile; S3 sets the score for each control item. If the score does not exceed the tolerance range of the control item set in S1, the score will be scored. If the score exceeds the tolerance range of the control item, the score will be recorded as 0. The total score calculated for each control item of the rubber product is the theoretical total score. S4 sets a veto value for each control item based on product and quality requirements. If a single item exceeds the veto value, it will be directly evaluated as unqualified and banned; S5 obtains the actual outline size of the rubber part to be tested through a laser scanner; S6 extracts the control items corresponding to the actual contour size of the tested rubber component obtained by S5 with reference to the standard contour established by S1, and compares them with the control items of the standard contour to obtain the score of each control item; S7 adds up the scores of all control items of the actual contour, converts the final score of the item into a percentage, and compares it with the score line set by S2. It then disposes of the actual component according to the product and process requirements and rules.

2. The method for evaluating the size of the molded rubber according to claim 1, characterized in that: The construction table in S1 includes a tread rubber construction table, a shoulder pad rubber construction table, an apex rubber construction table, and a sidewall rubber construction table.

3. The method for evaluating the size of the molded rubber according to claim 1, characterized in that: S1 establishes the profile standard of the rubber profile according to the requirements of the construction table, specifically, uses scanning software to generate rated profiles respectively, inputs standard dimensions, and establishes the profile standard of the rubber profile.

4. The method for evaluating the size of the molded rubber according to claim 1, characterized in that: The control items described in S1 include: average thickness difference: used to evaluate the average deviation between the actual scanning curve of a certain transition section and the standard curve; thickness symmetry of each section of the crown: used to evaluate the average deviation of the actual scanning curves of the left and right sections within the crown; thickness of each point of the crown: the thickness of each inflection point within the crown width; wing thickness: the inflection point adjacent to the edge thickness, independent of the thickness score of each point of the crown; cumulative width of each section of the crown exceeding the tolerance: a certain transition section within the crown width, exceeding the cumulative width of the thickness tolerance area; cumulative width of the wing transition section exceeding the tolerance: the transition section between the outer point of the crown width and the wing thickness point, exceeding the cumulative width of the thickness tolerance area; cumulative width of the edge transition section exceeding the tolerance: the transition section between the wing thickness point to the edge thickness point, exceeding the cumulative width of the thickness tolerance area.

5. The method for evaluating the size of the molded rubber according to claim 4, characterized in that: The calculation formula for the average thickness difference used to evaluate the average deviation between the actual scanning curve of a certain transition section and the standard curve is: Average thickness difference = (S x实 -(H x标 +H (x+1)标 )×Lx 实 ÷2)÷L x实 ; Among them, S x实 is the actual cross-sectional area of ​​the figure enclosed between points x and x+1, H x标 is the standard thickness at point x, H (x+1)标 =: standard thickness at point x+1, x is the point number on the construction table, L x实 is the actual width in the X direction between points x and x+1, where X is the point number on the construction table; The calculation formula for evaluating the thickness symmetry of each section of the crown for the average deviation of the actual scanning curves of the left and right sections within the crown is: Symmetry of thickness of each section of crown = (S x实 -S' x实 )÷MIN(L x实 , L' x实 ); Since the width of the left and right symmetrical segments may be inconsistent, which will cause the thickness symmetry distortion, when calculating the actual cross-sectional area, the outer inflection point of the segment is aligned, and the area corresponding to the actual curve of the inner wider part is discarded. Among them, S x实 is the actual cross-sectional area of ​​the figure enclosed between points x and x+1, S' x实 is the actual cross-sectional area of ​​the figure enclosed between points x' and (x+1)', L x实 is the actual width in the X direction between points x and x+1, L' x实 It is the actual width in the X direction between points x' and (x+1)', where X is the point on the construction table.

6. The method for evaluating the size of a molded rubber according to claim 1, characterized in that: The S2 sets the percentage score line of the molded rubber contour, including a first preset score line, a second preset score line and a third preset score line, wherein the first preset score line>the second preset score line>the third preset score line.

7. The method for evaluating the size of a molded rubber according to claim 1, characterized in that: The S3 sets the score of each control item according to the product and quality requirements. Specifically, the score is formulated according to the increasing level, 2 points for the first-level importance project, 3 points for the second-level importance project, 5 points for the third-level importance project, and finally a comprehensive score is given to the rubber size.

8. The method for evaluating the size of a molded rubber according to claim 1, characterized in that: As described in S7, the scores of all control items of the actual profile are added together to convert the final score of the percentage-based item. The conversion formula is: The final score of the project = (actual score / theoretical total score) * 100.

9. The method for evaluating the size of a molded rubber according to claim 6, characterized in that: The final score of the S7 project is compared with the score line set by S2, and the actual components are handled according to the product and process requirements and rules. Specifically, If the final score of the project is higher than the first preset score line, it will be put into use normally; If the final score of the project is lower than the second preset score line but higher than the third preset score line, it will be used as a concession; If the final score of the project is lower than the third preset score line, it will be considered unqualified and prohibited from use.

10. A system used in the method for evaluating the size of a molded rubber according to claim 1, characterized in that: It includes standard parameter establishment module, two-dimensional laser scanning module, centering module, comparison and evaluation module, output module and data storage module; Standard parameter establishment module, used to establish standard size profile of rubber molding, set control item tolerance, and set percentage score line; A two-dimensional laser scanning module is used to obtain two-dimensional contour data of the rubber part to be tested; The centering module is used to align the measured contour data of the molded rubber part with the standard size contour according to the preset center point; Comparison and evaluation module, used to compare and score the measured size profile of the rubber molding; Output module, used to output evaluation scores and judgment results; The data storage module is used to store the established standard parameters, evaluation scores and judgment results.

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