JPS61271396A - Method of wire drawing of non-ferrous metal wire - Google Patents

Abstract

PURPOSE:To simplify cleaning of the surface of a non-ferrous metal drawing, by using a specific water-soluble org. compd. as a wire drawing lubricant for a non-ferrous metal wire instead of conventional mineral oil-based lubricants and washing it out with water or steam. CONSTITUTION:At least one water-soluble org. compd. selected from the following four kinds of compds. is used as a wire drawing lubricant for non-ferrous wires: (1) ethylene glycol or propylene glycol and their homopolymers or copolymers; (2) aliph. and org. linear or cyclic monohydric or higher polyhydric glycol ethers and polyglycol ethers; (3) aliph. and org. linear or cyclic monohydric or higher polyhydric glycol esters and polyglycol esters; and (4) glycol ethers and polyglycol ethers of amino compds. contg. a prim. or sec. amino group or both of them.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for drawing non-ferrous metal wire, and more specifically, a method for drawing non-ferrous metal wire using a certain water-soluble organic compound as a wire drawing lubricant. Regarding a wire drawing method.

[Prior art] Non-ferrous metals (copper, aluminum, alloys thereof, etc.)
Mineral oil-based water-insoluble lubricants have conventionally been used as lubricants when drawing wires. However, mineral oil-based lubricants have various drawbacks as follows.

First, since mineral oil-based lubricants have high viscosity, metal powder and dust tend to adhere to them, which poses a problem when using non-ferrous metal wires coated with lubricant. If the metal wire is high-purity aluminum wire for capacitors and you are trying to connect it to a tab terminal, weldability will be poor if lubricant is applied, so use a solvent to degrease the lubricant and clean the surface. There is a need to. Furthermore, when the metal wire is a welding wire, it is necessary to degrease it with a solvent such as trichloroethyl to remove the lubricant, but trichlorethyl is not only expensive but also requires a recovery device due to its toxicity. Moreover, it contains the possibility of causing environmental problems.

[Object of the Invention] An object of the present invention is to provide a method for drawing a nonferrous metal wire without using conventional mineral oil-based lubricants.

[Configuration of the Invention] According to the present invention, a water-soluble organic compound is used as a lubricant in place of a conventional mineral oil-based lubricant.

Such water-soluble organic compounds include (1) ethylene glycol and propylene glycol and their sole or copolymers; (2) aliphatic and aromatic linear and cyclic monovalent and divalent or more polyvalent compounds; Glycol ethers and polyglycol ethers, (3) Aliphatic and aromatic linear and cyclic monovalent and divalent or more divalent polyvalent glycol esters and polyglycol esters, (4) Primary and secondary glycol esters and glycol ethers and polyglycol ethers of amino compounds containing both of them, and can be used alone or as a mixture of two or more.

According to the present invention, the water-soluble organic compound may be used in the same manner as conventional mineral oil lubricants.

Examples of nonferrous metal wires include wires made of copper, aluminum, and their alloys, such as high-purity wires for capacitors (purity 99
．． 9-99.99%) aluminum wire, aluminum (
or its alloy) welding wire, brass cut wire, aluminum bonding wire, etc. can be processed according to the present invention.

[Effects of the Invention] Since the organic compound used as a lubricant in the present invention is water-soluble, it can be easily removed by washing with water or steam, so that the surface of drawn nonferrous metal wire can be easily cleaned.

In particular, when the nonferrous metal wire is an aluminum welding wire or a high-purity aluminum wire for capacitors, it is advantageous because the surface can be degreased and cleaned using water or steam rather than an a-organic solvent such as trichloroethyl.

[Example] Example 1 Wire drawing of high-purity aluminum An aluminum wire rod of 9.5 mmφ or 11.7 mmφ was processed using a wire bar rolling mill or a continuous forging rolling mill using a polyethylene glycol-based lubricant as a lubricant. When the wire was drawn to a diameter of 0.5 to 2 .phi., good surface gloss and very clean surface quality were ensured.

Example 2 Wire drawing of aluminum welding wire An aluminum 5356 wire bar was first heated at 11°7Il.
5. Roll it to ffiφ. The wire was drawn to On+mφ, softened, and then further drawn to 1,6 mff1φ. A polyethylene glycol-based lubricant was used as a lubricant in each wire drawing process. The obtained wire drawing was washed with water.

A welding experiment was conducted using the obtained drawn wire as a MIG welding wire. Welding was carried out using fully automatic MIG horizontal orientation, using 5083-0 material (V groove) with a thickness of 10 m1+ as the base material. The welding conditions are shown in the table below.

For comparison, a similar welding experiment was conducted using a conventional welding wire (wire drawn using a mineral oil-based lubricant).

The results are shown in the table below.

table

Claims (1)

[Claims] 1. (1) Ethylene glycol and propylene glycol and their sole or copolymers; (2) aliphatic and aromatic chain and cyclic monovalent, divalent, or more polyvalent glycols; ethers and polyglycol ethers; (3) aliphatic and aromatic linear and cyclic monovalent and divalent or more polyvalent glycol esters and polyglycol esters; (4) primary, secondary, and both. A method for wire drawing of non-ferrous metals, characterized in that at least one water-soluble organic compound selected from the group consisting of glycol ethers and polyglycol ethers of amino compounds containing them is used as a wire drawing lubricant. 2. The method according to claim 1, wherein the non-ferrous metal wire is a metal wire for welding, and the drawn non-ferrous metal wire is washed with water or steam.