Wide-base truck radial tire building machine belt drum and design method

Abstract

The invention provides a wide-base truck radial tire building machine belt drum and a design method.A middle section of the belt drum is designed to be of a convex curved surface structure, the contour line of the surface of the belt drum is composed of two straight line sections and an arc section located between the two straight line sections, and according to the width of a main belt layer, the radius of curvature, the diameter of a first belt layer and the elongation, the width d of the arc section, the radius R of curvature, the diameter D of the belt drum and the lengths l1 and l2 of the two straight line sections are preliminarily determined; the optimal parameter is optimally determined through a tire building simulation method by using the cord thread elongation and tread rubber material flow uniformity as judgment standards.The cord thread elongation of the belt layers is effectively controlled, the problem that belt layer stress is uneven during sizing is thoroughly solved, the abnormal phenomenon that a wide-base tire shoulder rubber material flows to the crown center in the process of sizing in a machine is eliminated, the tire endurance quality is improved, and enforceability and operability are extremely strong.

Description

technical field [0001] The invention relates to the field of tire building process flow manufacturing, in particular to a belt drum and a design method of a wide-base load-bearing radial tire building machine. Background technique [0002] In recent years, the low-carbon economy has continuously promoted the development of tires in the direction of reducing fuel consumption, reducing emissions, and improving safety. The wide base of tires is one of the important ways to achieve this goal. Wide-based truck tires refer to tires with an aspect ratio of 0.65 and below. The main characteristics of wide-based tires are flattening, tubeless, and wide rims. On the vehicle, the wide-based tire single tire replaces the ordinary tire and installs a double tire, which is mainly used on the driving wheel, trailer wheel and semi-trailer wheel of the truck. [0003] The technical feature of the Michelin X-one wide-base tire is that the crown part adopts a 0° belt layer, that is, a 400m n...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of abnormal flow of the rubber material during the building of the wide-base radial tire machine, the present invention provides a belt drum of a wide-base radial tire building machine and a design method thereof. The belt drum of a wide-base radial tire building machine It is a curved drum structure, which solves the problem of abnormal flow of the rubber material during the molding of the heavy-duty wide-base radial tire, and can effectively improve the stress state of the carcass steel cord. Moreover, the curved drum structure is simple to implement and low in cost.

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