Reverse modeling method for structural design parameters of tread patterns

Abstract

The invention relates to a reverse modeling method for structural design parameters of tread patterns. The reverse modeling method comprises the steps that point cloud data attributes of a tire are obtained, the data attributes are analyzed, and a model reconstruction system is built; the conversion from 3D tread point cloud to a point cloud mapping matrix is conducted with the tread point cloud obtained through optimized segmentation as an object and a grid as a primary unit; according to the point cloud mapping matrix, the point cloud of a tire tread is segmented and extracted; the pattern boundary feature information is extracted, a pattern profile curve is constructed; according to the pattern profile curve, the permissible approximate error and the length and the number of segments ofmachining features are adjusted, so that pattern reconstruction optimization is achieved. By means of the reverse modeling method, the pattern construction design information can be quickly and efficiently recovered, the intelligence degree of the structural design of the tread patterns is improved, the types of basic patterns in a pattern rule base are perfected, and it is very instructive to complete the synergetic improvement in the multidimensional characteristics of the tire by improving the pattern structure forms.

Description

Technical field [0001] The invention belongs to the technical field of the tire industry, and specifically relates to a reverse modeling method oriented to tire tread structure design parameters. Background technique [0002] The EU labeling law limits and classifies the three major properties of rolling resistance, noise and wet grip of tires exported to the European market. Relevant investigations show that most of our tire products have excellent wet grip performance and can reach the EU labeling law A or B level, but the rolling resistance and noise are limited by the pattern configuration design but have not yet reached the second stage of the labeling law. In order to adapt to the needs of the domestic and foreign automotive markets and consumer purchases to promote my country’s tire companies to transform towards green and internationalization, in June 2016, the Rubber Industry Association referred to the European Union’s labeling law to deal with tire rolling resistance, ...

AI Technical Summary

Problems solved by technology

[0005] (1) The algorithms included in traditional reverse modeling need to undergo large-scale data operations such as triangulation and point cloud registration, and most of the algorithms have single functions and need to be called in a targeted manner. Requires a lot of human-computer interaction, lacks the intelligence of the program and the professionalism of the object

[0006] (2) The tire tread has double curvature characteristics and does not belong to any type of quadric surface features such as plane, sphere, and cylinder. The traditional reverse modeling process can only approximately express the shape information of the processing features, and it is difficult to construct a conforming Tread Structure Model for Tire Performance Requirements

[0007] (3) The surface of the tire is mainly composed of characteristic information such as pattern grooves and steel sheets with a large number of grooves, gaps and other fine features, which have a greater impact on the accuracy, accuracy and smoothness of the reconstructed features. High requirements, the traditional reverse modeling process cannot accurately describe the details of the pattern features, and it is even more difficult to restore the original geometric constraint relationship of the pattern structure design

[0008] (4) The 3D structure design of the tire tread generally starts from the two-dimensional design, and the three-dimensional curve is constructed mainly through the mapping of the two-dimensional curve to the three-dimensional tire surface, and then the 3D design of the tire tread structure is carried out. This reverse modeling process cannot express the structure of the tire tread structure. Original design intent, cannot be used to guide tire mold development

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