Pre-stress galvanizing steel strand manufacture method

Abstract

The invention relates to a pre-stress galvanizing steel strand manufacture method; the pre-stress galvanizing steel strand comprises a heart wire, inner wires and outer wires; the inner wires are wrapped outside the heart wire in an anticlockwise manner; the outer wires are wrapped outside the inner wires in an anticlockwise manner; the inner wires and outer wires are synchronically wrapped on the heart wire with same lay length, and the strand is formed in one time stranding moulding; the inner wires comprise 9 galvanizing steel wires, and the outer wires comprise 9 galvanizing steel wires. A drawing die angle and calibration bench parameters are finely designed in galvanizing drawing; most proper temperature and clamp tension parameters are selected in laying length and stabilization treatment under tension tempering after laying, so the prepared strand is uniform and compact; the galvanizing layer is strong in clunging and smooth in surface; the steel strand is tidy in wiring, compact, high in tension strength, high in breaking force, high in ductility, low in loosening property, strong in corrosion resistance, and long in life.

Description

technical field [0001] The invention belongs to the technical field of prestressed galvanized steel strands, in particular to a method for manufacturing prestressed galvanized steel strands. Background technique [0002] Prestressed galvanized steel strands are mainly used for railway and highway bridge cables, long-span cable-stayed bridges, mine roadway support, rock and soil anchoring projects, etc., which are multiple galvanized steel wires twisted on the machine at one time Stranded and stabilized at the same time. Each steel wire is hot-dip galvanized, with smooth surface, no zinc bumps, uniform thickness, no dezincification and iron leakage, high tensile strength, high ductility, low relaxation, and long service life in harsh conditions. Used in bridge cables, construction engineering, coal mine roadway support and other industries. At present, the process of galvanized steel strand is: including drawing treatment of raw materials, hot-dip galvanizing treatment, dra...

AI Technical Summary

Problems solved by technology

At present, the process of galvanized steel strand is: including drawing treatment of raw materials, hot-dip galvanizing treatment, drawing treatment of semi-finished products after plating, twisting and stabilization treatment under tension tempering. In the above process, not only the raw materials must be Careful selection, and the process parameters in each step need repeated trials to obtain the most optimal solution, but there are various problems in the existing process, such as: improper use of raw materials, rough design of raw material drawing process parameters, or galvanizing When the parameter selection is modeled, or the stabilization parameters after twisting are not carefully selected, this will cause the finished product of galvanized steel strand to have defects such as reduced tensile strength.