ANALYSIS OF DIE WEAR IN WIRE DRAWING CONSIDERING TEMPERATURE EFFECT

In the conventional wire drawing process the reduction is achieved by pulling the wire through a tapered die. The minimum bore size of such a die is always smaller than the inlet wire diameter. A suitable lubricant is used to reduce the die wear and drawing load and to produce a good surface finish. Nevertheless, the problem of die wear and wire breakage during start-up is always present. In this paper a new technique of wire drawing is being reported which eliminates the problem of wear and breakage during start-up and also the need to have the diameter of the leading end of the wire reduced for easy insertion through the die. The reduction of the wire diameter is affected by means of the hydrodynamic action of a polymer melt lubricant in conjunction with a long tapering tube, the diameter of the tube being greater than the nominal wire diameter. Reductions in area of up to 21 per cent can be obtained in one single pass using this dieless reduction unit.

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Advanced simulation of die wear caused by wire vibrations during wire-drawing process

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(11)61379-4 ◽

2012 ◽

Vol 22 (7) ◽

pp. 1723-1731 ◽

Cited By ~ 5

Author(s):

Kyung-Hun LEE ◽

Sang-Kon LEE ◽

Byung-Min KIM

Keyword(s):

Wire Drawing ◽

Drawing Process ◽

Die Wear

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Microstructural Development in Nb-Ti Multifilamentary Superconductors During Processing

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100117911 ◽

1985 ◽

Vol 43 ◽

pp. 190-191

Author(s):

A. W. West

Keyword(s):

Heat Treatment ◽

Critical Current Density ◽

Copper Matrix ◽

Wire Drawing ◽

Heat Treatments ◽

Microstructural Development ◽

Final Size ◽

Density Values ◽

The Wire ◽

Multifilamentary Superconductors

The influence of the filament microstructure on the critical current density values, Jc, of Nb-Ti multifilamentary superconducting composites has been well documented. However the development of these microstructures during composite processing is still under investigation.During manufacture, the multifilamentary composite is given several heat treatments interspersed in the wire-drawing schedule. Typically, these heat treatments are for 5 to 80 hours at temperatures between 523 and 573K. A short heat treatment of approximately 3 hours at 573K is usually given to the wire at final size. Originally this heat treatment was given to soften the copper matrix, but recent work has shown that it can markedly change both the Jc value and microstructure of the composite.

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