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Method for rolling metal wire bars under magnetostatic field auxiliary effect

A technology of metal wire and static magnetic field, applied in the direction of metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of high deformation resistance of materials, hardening of processing process, complicated process, etc., and achieve the improvement of yield and plastic deformation ability Improvement and low operating cost

Active Publication Date: 2015-11-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to use the static magnetic field to reduce the deformation resistance of the material processing process and the adverse effect of work hardening on the further processing of the material in the process of high-speed rolling, extrusion and drawing of the metal wire rod, so as to realize the metal The high-speed, high-precision and high-yield processing of wire and rod solves the problems caused by high-speed wire and rod processing due to high material deformation resistance and hardening during processing, and overcomes the low efficiency and difficulty of improving material plasticity in existing technologies , process complex issues

Method used

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  • Method for rolling metal wire bars under magnetostatic field auxiliary effect

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Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Extrusion and drawing of copper

[0021] An oxygen-free copper billet with a diameter of 18 cm was obtained through a power frequency induction melting furnace and semi-continuous casting as the billet for copper extrusion and drawing in this embodiment.

[0022] Continuous extrusion process is used to produce copper wire. The main method steps are as follows: first, the oxygen-free copper billet is heated to 650°C, and then enters the conveying roller table, ready to be sent to the extruder for the first rolling, and then enters the extruder A gradient magnetic field composed of three groups of U-shaped permanent magnets and one group of stable electromagnets is placed on the front conveying roller table; the magnetic induction intensity of the first group of permanent magnets in this embodiment is 0.25T, and the width along the direction of travel of the metal wire rod blank is That is, the width of the action area is 0.5 meters, the magnetic induction i...

Embodiment 2

[0026] Embodiment 2: Extrusion and drawing of copper

[0027] Obtain an oxygen-free copper billet through a power frequency induction melting furnace and semi-continuous casting, and the diameter of the billet is 20 cm, which is used as the billet for copper extrusion and drawing in this embodiment;

[0028] The continuous extrusion and drawing process is used to produce ultra-fine copper wire. The main method steps are as follows: firstly, the oxygen-free copper billet is heated to 650°C, and then enters the conveying roller table, and is ready to be sent to the extruder for the first rolling. A gradient magnetic field composed of three sets of U-shaped permanent magnets and a set of steady electromagnets is placed on the conveying roller table before entering the extruder; the magnetic induction intensity of the first set of permanent magnets in this embodiment is 0.30T, The width of the billet travel direction, that is, the width of the action area is 0.5 meters, the magnet...

Embodiment 3

[0032] Extrusion of embodiment 3 magnesium alloy bar

[0033] Preheat the deformed magnesium alloy ingot with a diameter of 200mm to 350°C and put it into the conveying roller table equipped with a static magnetic field, preheat the extrusion die to 350°C, and use a metal extruder to extrude the magnesium alloy ingot into a 10mm For rods, the corresponding extrusion temperature is 380°C, the extrusion rate is 0.5m / min, and the extrusion ratios of the two passes are 10:1 and 2:1 respectively; the static magnetic field installed in the first pass is A gradient magnetic field composed of three sets of circular permanent magnets and a set of stable electromagnets arranged side by side: the magnetic induction intensity of the first set of permanent magnets is 0.20T, and the width along the direction of travel of the metal wire bar blank, that is, the width of the action area is 0.20 meters, the magnetic induction intensity of the second group of permanent magnets is 0.40T, the widt...

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Abstract

The invention mainly relates to the technical field of extrusion rolling and drawing of metal wire bars, in particular to a method for rolling metal wire bars under a magnetostatic field auxiliary effect. The method is characterized by comprising the following steps: a magnetostatic field is installed in the advancing direction of metal wire bar blanks; before the metal wire bar blanks are rolled, extruded and drawn, the metal wire bar blanks are suffered from a magnetic field effect in the process of passing through the magnetostatic field area; the longitudinal center line of the metal wire bar blanks is consistent with the advancing direction thereof; and the blanks are rolled, extruded and drawn by rollers after the treatment of the magnetostatic field auxiliary effect. For multiple times of rolling, extrusion and drawing, the magnetostatic field treatment is performed before each time of rolling. The method has the following advantages: the material deformation resistance is prominently reduced; the rolling defects are reduced; the finished product size precision is high; the material mechanical performance, in particular the strength and the toughness are improved; and the synchronous reinforcement of the material toughness is realized.

Description

technical field [0001] The invention mainly relates to the technical field of extrusion, rolling and drawing of metal wires and rods, in particular to a method for rolling metal wires and rods under the auxiliary action of a static magnetic field. Background technique [0002] Metal wire rod is an important material for engineering machinery, and its most important production method is through rolling extrusion and drawing forming; due to the relatively large deformation resistance of many metals, the rolling and extrusion of metal wire rods or Drawing requires high energy consumption, especially when using high-strength metal production line bars, the processing is difficult, the dimensional accuracy and the yield are low; moreover, in the process of metal rolling extrusion and drawing, in order to make the metal easy Deformation processing often requires heating the metal wire rod blank to a higher temperature. For some active metals, especially aluminum, magnesium, titani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/18B21B9/00
CPCB21B1/18B21B1/463B21B9/00B21C37/047C22F1/057B21B1/42B21B39/06C21D10/00
Inventor 王宏明李桂荣
Owner JIANGSU UNIV
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