A tire profile automatic conversion method, system and program product based on coordinate conversion

Abstract

The present application relates to the technical field of tire design, and particularly relates to a tire type rubber outer contour automatic conversion method, system and program product based on coordinate conversion. The method automatically reads and processes the outer contour feature point coordinates of the conversion object and the flip object through a program, calculates the distance of the feature points to the upper contour, and generates new conversion coordinates. Then, the program automatically draws the upper and lower parts of the new contour, and connects them through an automatic algorithm to form a complete conversion contour. The present application significantly improves the design accuracy and work efficiency, reduces manual operation and human error, and avoids the problems of missing points and repeated points caused by manual measurement. It has strong adaptability and can handle the automatic conversion of irregular contours, and is suitable for different design software platforms. By reducing the work burden of designers and improving the intelligent level, the present application provides an efficient and accurate automatic solution for tire type rubber design, and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire design, and particularly relates to a tire profile automatic conversion method, system and program product based on coordinate conversion. BACKGROUND

[0002] In modern tire manufacturing, profile design is a crucial link. The main task of tire profile design is to design a suitable outer contour according to the use requirements and performance indicators of the tire, so as to ensure the stability, wear resistance and other performance characteristics of the tire in the use process. In the traditional tire profile design, two-dimensional design software such as AutoCAD is often used for design. However, the existing design tools such as AutoCAD only have basic mirror functions, including up-down mirror and left-right mirror, and these basic functions cannot meet the more complex geometric transformation requirements of the tire profile in the design process.

[0003] In the design process of the tire profile, especially in the operation of converting the profile from left-right composite to up-down composite, the existing design tools face the following problems:

[0004] 1. Low precision and efficiency: In the existing tools, the designer needs to measure the feature points by hand, record the data, and finally obtain the coordinates of the new feature points and draw the new contour by hand. Since this process involves a lot of manual operations, the repetitive labor is serious, and it is easy to cause precision problems, including measurement errors, omissions or repetitions, which greatly reduces the design efficiency of the tire profile.

[0005] 2. More manual intervention: For some irregularly transformed objects, the existing tools cannot automatically convert, and the designer needs to manually adjust and calculate the coordinates of the feature points, and rely on manual operation, which not only increases the workload, but also is prone to errors.

[0006] 3. Lack of effective tool support: In design software such as AutoCAD or 3D design software (such as CATIA), although basic mirror tools are provided, there is no effective automatic support for profile composite conversion and other special design requirements. Especially in profile design, each tire design scheme and requirement has its uniqueness, and often needs to be adjusted manually for each specific design, and there is no effective tool for automatic conversion.

[0007] 4. Complex processing of irregular contours: Traditional methods lack systematic and automated solutions for irregular contour transformation, resulting in inaccurate design during contour conversion, and a large amount of time and calculation is required to process complex geometric shapes, further affecting the efficiency and quality of the design.

[0008] Therefore, the existing tire type glue design method and tool have obvious defects, cannot meet the tire type glue outer contour conversion requirements of complex design and high precision requirements, and greatly increase the work burden of the design personnel and reduce the design efficiency. SUMMARY

[0009] In order to solve the above technical problems, the present application provides a kind of based on coordinate conversion's tire type glue outer contour automatic conversion method, to realize the operation of tire type glue left and right composite conversion to upper and lower composite by software automation, reduce manual operation, improve the precision and efficiency of design, and provide more efficient and accurate tool for tire type glue design.

[0010] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0011] A kind of based on coordinate conversion's tire type glue outer contour automatic conversion method, comprising the following steps:

[0012] Step 1: selecting conversion object and upper and lower flip object, program reads the coordinates of all feature points of conversion object outer contour, denoted as (x, y), and reads the coordinates of all feature points of flip object outer contour, denoted as (a, b);

[0013] Step 2: processing the coordinate data, including:

[0014] 2.1) according to the size of horizontal coordinate, (x, y) and (a, b) coordinate group are sorted, and all feature points with horizontal coordinate located in flip object (a, b) coordinate group are screened out;

[0015] 2.2) the vertical distance yi of the feature point xi=x to the upper outer contour is calculated, and the conversion coordinate group (xi, yi) of the conversion contour is obtained, wherein the distance difference between the feature points is processed during calculation, and for the feature points located at the boundary of conversion object and flip object, fine distance optimization calculation is carried out;

[0016] 2.3) the vertical coordinate of flip object coordinate group (a, b) is imaged up and down, and the conversion coordinate group (a, -b) of flip object feature point is obtained, wherein the mirror operation flips up and down for the flip object and optimizes the symmetry of coordinates;

[0017] Step 3: using program to draw the conversion new contour, including:

[0018] 3.1) the upper part of the conversion new contour is drawn, including the following two parts:

[0019] 3.1.1) conversion object feature point coordinate unchanged part: that is, the part of conversion object horizontal coordinate outside a coordinate group range, keep original coordinate to draw;

[0020] 3.1.2) Change in the coordinates of the feature points of the transformed object: Feature points whose x-coordinates are within the range of coordinate group a are drawn according to the transformed coordinates (xi, yi) calculated in step 2.2).

[0021] 3.2) Draw the lower part of the new contour by drawing the feature points in the transformation coordinate group (a, -b) of the flipped object, and connect them one by one in descending order of horizontal coordinates to form the lower half of the transformation contour.

[0022] Step 4: Connect the upper and lower parts obtained in Step 3 to form a complete new contour. The tail feature points of the upper part and the head feature points of the lower part are connected by an automatic algorithm to complete the generation of the final transformed new contour.

[0023] Preferably, in step 1, the bottom edge of the transformed object is a horizontal line, and the y-coordinate of the last point in its feature point coordinate group is equal to the y-coordinate of the first point. The upper outer contour is the contour part of the transformed object and the flipped object after removing the horizontal bottom line.

[0024] Preferably, in step 2.1, when sorting the horizontal coordinates of the (x, y) coordinate group and the (a, b) coordinate group, an adaptive sorting algorithm is used to improve the processing capability of complex contour feature points.

[0025] Preferably, in step 3.1, the program sorts the feature points by their horizontal coordinates and connects them one by one in ascending order. During the processing, the program automatically corrects the errors of the feature points to ensure the smoothness and accuracy of the connecting lines.

[0026] Preferably, in step 3.2, the program optimizes the connection method of the lower half of the contour based on the feature points in the flipped object coordinate group (a, -b), ensuring a more natural transition in the lower half and avoiding abrupt curve changes caused by uneven data point spacing.

[0027] Preferably, in step 4, the program uses an adaptive algorithm to seamlessly connect the upper and lower contours, avoiding manual intervention and improving the automation accuracy and efficiency of contour conversion.

[0028] Furthermore, the present invention also provides an automatic conversion system for the outer contour of tire-type rubber, the system implementing the method comprising:

[0029] The calculation module is used to read the coordinates of the outer contour feature points of the transformed and flipped objects, and to rearrange and filter the coordinate data;

[0030] The data processing module is used to calculate the distance to the selected feature points and generate transformed coordinates;

[0031] The drawing module is used to generate the upper and lower halves of the transformation profile based on the transformation coordinates, and then connect the two parts to form the final transformation profile.

[0032] Preferably, the calculation module adaptively sorts the feature points according to their abscissas and calculates the distance from the feature points to the upper outer contour according to the optimized calculation formula, thereby improving the accuracy of the coordinate transformation.

[0033] Furthermore, the present invention also provides a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed by a processor, implement the method.

[0034] Furthermore, the present invention also provides a computer program product, including a computer program or instructions that, when executed by a processor, implement the method.

[0035] By employing the aforementioned technical solution, this invention significantly improves the accuracy and efficiency of the molding process through automation. Compared to existing technologies, this invention offers the following significant technical advantages:

[0036] 1. Improved Design Accuracy: This invention automatically calculates the transformation of feature point coordinates through a program, avoiding errors from manual measurement and reducing potential mistakes caused by manual drawing, such as missing points, duplicate points, and errors. The transformation process is based on coordinate data processing and optimization calculations, ensuring the accuracy of the new contour, thereby improving the overall accuracy of tire-shaped rubber design.

[0037] 2. Significantly Improved Work Efficiency: Through automated conversion processes, this invention effectively reduces manual operations and repetitive labor for designers, eliminating the need for tedious manual measurement, recording, and drawing steps in mold profile conversion. Designers only need to select the conversion object and the object to be flipped, and the program automatically completes the remaining operations, greatly improving design efficiency and shortening the design cycle.

[0038] 3. Reduced Manual Intervention: Existing design tools require designers to manually measure, record coordinates, and draw complex mold outlines. This invention, however, reduces manual intervention through automation. Designers only need to input the necessary initial data, and the program can automatically complete coordinate transformation, outline drawing, and connection, reducing errors caused by human operation.

[0039] 4. Adaptable to diverse design needs: This invention can flexibly handle different types of tire-shaped rubber designs, especially for complex and irregular contour transformations, and can automatically adjust and transform coordinates according to specific requirements. Whether it is a left-right composite transformation or a top-bottom composite transformation, it can be completed automatically according to design requirements, demonstrating strong adaptability.

[0040] 5. Enhancing the intelligence level of design tools: Through the method of this invention, tire molding design is no longer limited to simple mirroring operations, but introduces a coordinate transformation calculation model, giving the tire molding design tool a higher level of intelligence. Especially when dealing with irregular contours, the automated transformation method can provide accurate and efficient solutions, providing tire designers with more intelligent auxiliary tools.

[0041] 6. Reduced workload for designers: Due to the automated nature of this invention, designers no longer need to perform tedious manual operations such as feature point measurement, data recording, and manual contour drawing, thus reducing their workload. Designers can then focus more on design optimization and other key decisions.

[0042] 7. Applicable to multiple design software: The coordinate transformation method of this invention can be applied not only to existing 2D design software (such as AutoCAD) but also to more advanced 3D design platforms (such as CATIA). Therefore, this invention has broad applicability, can meet the needs of users of different design software, and further expands its application scope.

[0043] In summary, the automatic conversion method for the outer contour of tire-shaped rubber based on coordinate transformation of the present invention has significant technical advantages in improving design accuracy, increasing work efficiency, reducing manual intervention and workload, and provides an efficient, accurate and intelligent solution for the field of tire-shaped rubber design. Attached Figure Description

[0044] Figure 1 This is for converting objects and flipping objects up or down.

[0045] Figure 2 To transform into a new outline.

[0046] Figure 3 This is used to transform objects and flip the outer contour of objects up or down.

[0047] Figure 4 This is for the location data of feature points of the object being transformed and the object being flipped up or down.

[0048] Figure 5 This refers to the segmented outlines before the program automatically connects the segments.

[0049] Figure 6 This is for converting an object after mirroring it. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0051] An automatic conversion method for the outer contour of a tire-shaped rubber compound based on coordinate transformation includes the following steps:

[0052] Step 1, select the objects to be transformed and the objects to be flipped up and down:

[0053] When a transformation object is selected, the program reads the coordinates of all feature points on the outer contour of the transformation object and records them as (x, y); when an up or down flip object is selected, the program reads the coordinates of all feature points on the outer contour of the flipped object and records them as (a, b).

[0054] Note: By default, the bottom edge of the transformed object is a horizontal line, that is, the y-coordinate of the last point in the (x, y) coordinate group is equal to the y-coordinate of the first point - the upper outer contour refers to the contour part of the transformed object and the flipped object excluding the horizontal bottom line.

[0055] Step 2, coordinate data processing:

[0056] 2.1) Based on the (x, y) coordinate group and (a, b) coordinate group read in step 1, the program rearranges the two sets of feature points according to the size of the abscissa of the feature points, and filters out all feature points whose abscissa is within the range of 'a' in the (a, b) coordinate group of the flipped object.

[0057] 2.2) For the feature point xi=x selected in 2.1, the program calculates the distance yi from the point to the upper outer contour, and obtains the transformation coordinate set (xi, yi) of the transformed contour feature point.

[0058] 2.2.1) For feature points located on the object to be transformed, calculate the distance from the point to the outer contour of the object to be flipped;

[0059] 2.2.2) For feature points located on the flipped object, calculate the distance from the point to the outer contour of the transformed object;

[0060] Note: By default, the bottom edge of the transformed object is a horizontal line, that is, the y-coordinate of the last point in the (x, y) coordinate group is equal to the y-coordinate of the first point - the upper outer contour refers to the contour part of the transformed object and the flipped object excluding the horizontal bottom line.

[0061] 2.3 Mirror the vertical coordinates of the flipped object's coordinate set (a, b) to obtain the transformed coordinate set (a, -b) of the flipped object's feature points.

[0062] Step 3: Use the program to transform and draw the new outline.

[0063] 3.1) Transform the upper part of the new contour: This includes the part where the coordinates of the feature points of the transformed object remain unchanged and the part where the coordinates of the feature points change.

[0064] 3.1.1) The part of the feature point coordinates of the transformed object that remains unchanged: The part of the transformed object whose x-coordinate is outside the range of coordinate group a is used as the new contour feature point (x, y). The program connects the points one by one in ascending order of x-coordinate.

[0065] 3.1.2) Feature point coordinate transformation: The feature points whose x-coordinates are within the range of coordinate group a are transformed into their coordinates, i.e., the (xi, yi) coordinate group obtained in step 2.2. The program connects the points one by one with their x-coordinates increasing from smallest to largest.

[0066] Note: Feature points located above the dividing line are converted to coordinate points (xi, yi) and connected by the program in ascending order of their horizontal coordinates. This is only applicable when the dividing line is a linear function.

[0067] 3.2) Transform the lower part of the new contour:

[0068] That is, the coordinate group (a, b) is transformed into the coordinate group (a, -b), and the program connects the points one by one with the horizontal coordinates from large to small.

[0069] Step 4: The program connects the first and last feature points of the two transformation contour lines in 3.1) and 3.2).

[0070] The program automatically connects the tail feature point in 3.1.1) and the first feature point in 3.1.2), and connects the tail feature point in 3.2) and the first feature point in 3.1), thus obtaining the transformed new contour.

[0071] Note: The above only applies to the conversion of the mold outline when the flipped object is on the right. For cases where the flipped object is on the left, first mirror the object to be converted (left and right), adjust the flipped object to the right, and then perform the outline conversion according to steps 1, 2, 3, and 4. Mirror the converted outline again (left and right) to obtain the target converted outline.

[0072] The preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

[0073] Step 1, Select the objects to be transformed and the objects to be flipped up and down:

[0074] When a transformation object is selected, the program reads the coordinates of all feature points on the outer contour of the transformation object and records them as (x, y); when an up or down flip object is selected, the program reads the coordinates of all feature points on the outer contour of the flipped object and records them as (a, b).

[0075] In Figure 4, the (x, y) coordinate groups are: P1(0, 0), P2(0, 0.5), P3(1, 0.8), P4(6, 2.8), P5(24, 2.8) and P6(48, 0);

[0076] The coordinate system (a, b) is: P7(19, 0), P8(19, 0.75), P9(33, 1.75), P10(48, 0).

[0077] Step 2, Coordinate Data Processing:

[0078] 2.1 Based on the (x, y) coordinate group and (a, b) coordinate group read in step 1, the program rearranges the two sets of feature points according to the size of the abscissa of the feature points, and filters out all feature points whose abscissa is located in the (a, b) coordinate group of the flipped object, that is, P7(19, 0), P8(19, 0.75), P5(24, 2.8), P9(33, 1.75), P10(48, 0) in Figure 4;

[0079] Note: P10 and P6 are the same. The program will delete one of them. Let's take keeping P10 as an example.

[0080] 2.2 For the feature point xi=x selected in 2.1, the program calculates the distance yi from the point to the upper outer contour, and obtains the transformed coordinate set (xi, yi) of the transformed contour feature point. That is, P11 (19, 2.8), P12 (19, 2.05), P13 (24, 1.69286), P14 (33, 0), and P15 (48, 0) in Figure 5.

[0081] 2.3 Mirror the vertical coordinates of the flipped object (a, b) to obtain the transformed coordinates of the flipped object feature points (a, -b), namely P7'(19, 0), P8'(19, -0.75), P9'(33, -1.75), and P10'(48, 0) in Figure 5.

[0082] Step 3: Use the program to transform and draw the new outline.

[0083] 3.1 Transform the upper part of the new contour: This includes the part where the coordinates of the feature points of the transformed object remain unchanged and the part where the coordinates of the feature points change.

[0084] 3.1.1) The part of the object whose feature point coordinates remain unchanged: The part of the object whose x-coordinate is outside the range of coordinate group a is transformed, and (x, y) is used as the new contour feature point, that is, P1(0, 0), P2(0, 0.5), P3(1, 0.8), P4(6, 2.8) in Figure 5. The program connects the points one by one in ascending order of x-coordinate.

[0085] 3.1.2) Feature point coordinate transformation: The transformed coordinates of feature points whose x-coordinates are within the range of coordinate group a are the coordinates obtained in step 2.2, namely the (xi, yi) coordinate group, i.e., P11(19, 2.8), P12(19, 2.05), P13(24, 1.69286), P14(33, 0), and P15(48, 0) in Figure 5. The program connects the points one by one with the x-coordinates increasing from smallest to largest.

[0086] 3.2 Transform the lower part of the new outline:

[0087] That is, the coordinate group (a, b) is transformed into the coordinate group (a, -b). In Figure 5, P10'(48, 0), P9'(33, -1.75), P8'(19, -0.75), and P7'(19, 0) are connected point by point with the horizontal coordinates from large to small.

[0088] Step 4: The program deletes duplicate points again and connects the first and last feature points of the two transformed contour lines in 3.1 and the transformed lower contour line in 3.2.

[0089] In Figure 5, P15 and P6' are the same point. The program will delete one of them and connect the tail feature point P4(6, 2.8) in 3.1 1) and the first feature point P11(19, 2.8) in 3.1 2). It will also connect the tail feature point P7'(19, 0) in 3.2) and the first feature point P1(0, 0) in 3.1) to obtain the new contour.

[0090] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A tire profile automatic conversion method based on coordinate conversion, characterized by, The method comprises the following steps: Step 1: Select the conversion object and the upper and lower flip objects, the program reads all the feature point coordinates of the outer contour of the conversion object, denoted as (x, y), and reads all the feature point coordinates of the outer contour of the flip object, denoted as (a, b); Step 2: Process the coordinate data, including: 2.1) Sort the (x, y) and (a, b) coordinate groups according to the size of the horizontal coordinates, and select all the feature points whose horizontal coordinates are located in the flip object (a, b) coordinate group; 2.2) Calculate the vertical distance yi of the selected feature point xi=x to the upper outer contour to obtain the conversion coordinate group (xi, yi) of the conversion contour, wherein the calculation process includes processing the distance difference between the feature points, and for the feature points located at the boundary of the conversion object and the flip object, fine distance optimization calculation is performed; 2.3) Mirror the vertical coordinates of the flip object coordinate group (a, b) to obtain the conversion coordinate group (a, -b) of the feature points of the flip object, wherein the mirror operation flips the flip object up and down and optimizes the symmetry of the coordinates; Step 3: Use the program to draw the conversion new contour, including: 3.1) Draw the upper part of the conversion new contour, including the following two parts: 3.1.1) The conversion object feature point coordinate unchanged part: the part of the conversion object horizontal coordinate outside the a coordinate group range, keep the original coordinate for drawing; 3.1.2) Conversion object feature point coordinate change part: the feature points whose horizontal coordinates are located in the a coordinate group range, draw according to the conversion coordinates (xi, yi) calculated in step 2.2); 3.2) Draw the lower part of the conversion new contour, draw the feature points in the conversion coordinate group (a, -b) of the flip object, and connect them point by point in the order of horizontal coordinates from large to small to form the lower half of the conversion contour; Step 4: The upper and lower parts obtained in Step 3 are joined to form the complete new profile, wherein, The tail feature point of the upper part and the head feature point of the lower part are connected by an automatic algorithm to complete the generation of the final conversion new contour.

2. The method of claim 1, wherein, In step 1, the bottom edge of the conversion object is a horizontal line, and the y coordinate of the last point in the feature point coordinate group is equal to the y coordinate of the first point, and the upper outer contour is the contour part of the conversion object and the flip object after removing the horizontal bottom line.

3. The method of claim 1, wherein, In step 2.1, when sorting the (x, y) and (a, b) coordinate groups according to the horizontal coordinates, an adaptive sorting algorithm is used to improve the processing capability of complex contour feature points.

4. The method of claim 1, wherein, In step 3.1, the program connects the feature points in the order from small to large by sorting the feature points according to the horizontal coordinates, and automatically corrects the errors of the feature points during the processing to ensure the smoothness and accuracy of the connection line.

5. The method of claim 1, wherein, In step 3.2, the program optimizes the connection method of the lower half of the contour based on the feature points in the conversion coordinate group (a, -b) of the flip object to ensure that the transition of the lower half is more natural and to avoid sudden changes in the curve caused by uneven data point spacing.

6. The method of claim 1, wherein in step 4, the program seamlessly connects the upper and lower contours by an adaptive algorithm, avoiding manual intervention and improving the automation accuracy and work efficiency of the conversion contour.

7. A system for automatic conversion of the outer profile of a tire-type rubber profile, characterized in that it implements the method of any one of claims 1-6, comprising: a calculation module for reading the coordinates of the feature points of the conversion object and the inversion object, and rearranging and filtering the coordinate data; a data processing module for calculating the distance of the filtered feature points, and generating conversion coordinates; a drawing module for generating the upper half and the lower half of the conversion profile according to the conversion coordinates, and connecting the two halves to form the final conversion profile.

8. The system of claim 7, wherein, The calculation module performs adaptive sorting according to the horizontal coordinates of the feature points, and calculates the distance of the feature points to the upper outer profile according to the optimized calculation formula, thereby improving the accuracy of the conversion coordinates.

9. A computer readable storage medium having stored thereon a computer program or instructions, characterized in that, The computer program or instructions, when executed by a processor, implement the method of any one of claims 1-6.

10. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions, when executed by a processor, implement the method of any one of claims 1-6.

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