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Rectangular section steel wire for radial tire and method for making bead ring

A technology for radial tires with a rectangular cross-section, which is applied in the production of rectangular bead wires and their bead rings. It can solve the problems of high contact pressure, poor geometric stability of the bead, and reduced tear resistance of the bead ring, and achieve low contact pressure. , small contact stress, and good geometric shape stability

Active Publication Date: 2018-05-25
JIANGSU XINGDA STEEL TYPE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the steel wires of the bead ring are made of circular cross-section bead steel wires. The bead wires of this kind are in linear contact and the contact pressure is high. The surface of the steel wires is plated with tin bronze to improve the corrosion resistance and adhesion performance of the steel wires; Rubber, because rubber is an elastic-plastic material, during molding and vulcanization, the rubber between the steel wires moves, resulting in poor geometric stability of the bead, which reduces the tear resistance of the steel traveler

Method used

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  • Rectangular section steel wire for radial tire and method for making bead ring
  • Rectangular section steel wire for radial tire and method for making bead ring
  • Rectangular section steel wire for radial tire and method for making bead ring

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Embodiment Construction

[0033] The following is a further detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

[0034] see figure 1 As shown, a steel wire with a rectangular section for a radial tire has a rectangular section. The width W of the section of the steel wire is 1.50-3.00mm, and the thickness T is 1.00-2.00mm. The edge radius R is 0.20-0.50mm, and the tensile strength of the steel wire is ≥1800Mpa.

[0035] The manufacturing method of the steel wire with a rectangular section for the radial tire comprises the following steps:

[0036] ⑴Wire rod surface pretreatment: Mechanical descaling, cleaning, boron coating and drying are performed on the surface of wire rods with a carbon content of 0.65-0.95% and a diameter of Φ5.50-7.00mm;

[0037] ⑵Die drawing: the wire rod after surface pretreatment is drawn into Φ1.50~3.00mm circular cross-section steel wire on a straight-in dry drawing machine;

[0038] (3) Galvanizing: After t...

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Abstract

The invention discloses a rectangular cross-section steel wire for a radial tire and a method for manufacturing a steel wire ring thereof. The rectangular cross-section steel wire is manufactured by adopting a round cross-section high-carbon steel wire in a roller-drawing mode and undergoes surface galvanization and tempering treatment, and m rectangular steel wires are twined side by side in n layers and are bundled by straps for forming the steel wire ring. The steel wire ring serves as a tire bead core of the radial tire and is small in cross section area; surface contact is adopted between the steel wires, and therefore the geometrical shape stability is good; the contact stress between the steel wires is small, the cross section strength between the steel wires is high, and therefore the wear resistance and the tearing resistance of a tire bead can be improved, and the manufacturing cost of the tire can be reduced.

Description

technical field [0001] The invention relates to a radial tire frame material, in particular to the manufacture of a rectangular bead steel wire and a steel traveler thereof. Background technique [0002] A radial tire is generally composed of a crown, a sidewall, and a bead. The bead is tightened on the rim, providing a support point for the tire carcass, and carrying the outward expansion pressure of the carcass and the lateral force of the tire during turning. Therefore, Beads are required to have high strength, stability and not easily deformed. The bead is composed of a bead ring and a chafer, and the steel wire used to make the bead ring is the bead wire. Most of the steel wires of the bead ring are made of circular cross-section bead steel wires. The bead wires of this kind are in linear contact and the contact pressure is high. The surface of the steel wires is plated with tin bronze to improve the corrosion resistance and adhesion performance of the steel wires; Ru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/04B21C37/04
CPCB21C37/042B60C15/04
Inventor 刘锦兰苗为钢姚海东朱银贵王万林
Owner JIANGSU XINGDA STEEL TYPE CORD
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