CN101582309B - Processing process of enameled flat aluminium wire - Google Patents

Abstract

The invention relates to a processing process of an enameled flat wire, in particular a processing process of an enameled aluminum flat wire. The processing process takes the aluminum rim wire as the raw material and comprises the following steps: firstly, the aluminum rim wire is pressed into a flat wire blank with a rectangular cross section through a pressing roll; secondly, the flat wire blankprepared in the first step is molded by cold drawing by adopting a cold-drawing wire-drawing device and rewound; thirdly, the flat wire in the second step is unwound at a uniform speed and is softened through a softening furnace under the oxygen-free environment or the low oxygen environment; fourthly, the continuously softened flat wire with the temperature of 480 to 520 DEG C is immerged into water with temperature of 20-30 DEG C to be cooled under the oxygen-free environment or the low oxygen environment and is taken out of the water and then blown and dried; fifthly, the 1731 polyester paint is evenly coated on the dried flat wire and then dried; and sixthly, the 1754 or 1765 polyester paint is evenly coated on the flat wire coated with the base paint, then dried and rewound to obtainthe aluminum flat wire. The finished enameled aluminum flat wire manufactured through the process has good adhesion, less heat, higher thermal shock resistance and good freeze-tolerance and solvent resistance.

Description

The processing technology of enameled aluminium flat wire

Technical field

The present invention relates to a kind of processing technology of enameled sheet wire, relating in particular to aluminium is the processing technology that raw material are made enameled sheet wire.

Background technology

At present because the rising all the way of copper valency, be that the production of articles cost of raw material is high with copper, domestic many dry-type transformer factory adds that to use aluminum steel instead be the coiling group.Because aluminium and copper all have very high conductance, density has only 1/3rd of copper, and unit cost can reduce significantly comparatively speaking.Therefore, enameled aluminium flat wire arises at the historic moment, and it is to coat the multilayer insulation lacquer coat on bare wire, and the manufactured goods tack is good, proof voltage grade height, and can not produce voltage drop after the storage.But, the enameled aluminium flat wire that prior art is produced also exists the non-oxidizability of core low, the defective of a back core size that contracts less than target size, work in-process is difficult to control line wicking surface quality and core size in the later consistency of thermal deformation, the part can occur and the problem that priming paint adhesive force is low, core does not meet design size occur.

Summary of the invention

The present invention is directed to above problem, a kind of surplus that contracts of reserving on mould is provided, softening, the cooling of anaerobic or hypoxemia meets finished size to relate to requirement, the core surface does not have or the processing technology of the enameled aluminium flat wire of rare oxide layer.

Technical scheme of the present invention is: it is a raw material with the aluminium astragal, according to the following steps processing:

1), flattens; By pressure roller the aluminium astragal is pressed into the lenticular wire base that the cross section is a rectangle;

2), cold-drawn; Adopt the cold-drawn wire-drawing equipment will go up the lenticular wire base drawing moulding that step makes, wherein the width at the mould outlet place of cold-drawn wire-drawing equipment, height dimension are bigger by 4～6% than width, the height dimension of lenticular wire target size, take-up;

3), softening; To go up at the uniform velocity unwrapping wire of step lenticular wire, by softening furnace, softening temperature is 480～520 ℃ in anaerobic or low-oxygen environment;

4), cooling; With the temperature that continues operation is that 480～520 ℃ lenticular wire immerses in above-mentioned anaerobic or low-oxygen environment in 20～30 ℃ the water; The blowing of dried up back, drying;

5), prime; On dry lenticular wire, evenly apply 1731 polyester lacquer, drying;

6), be coated with finish paint; On the lenticular wire that scribbles priming paint, evenly apply 1754 or 1765 polyester lacquer, drying; Take-up makes.

The present invention has reserved a surplus that contracts for guaranteeing the size of finished product on the cold-drawn mould; (surplus contracts: aluminum steel can generate heat when drawing deformation, owing to expand with heat and contract with cold, size can be littler than mould outlet place after the moulding.) make that manufactured goods can be owing to a contract surplus and littler than design size of existence.In softening step, aluminum steel inserted in anaerobic or the few oxygen environment process, reduced the degree that oxide layer appears in aluminium matter line surface; Like this, when its surface-coated priming paint, can make priming paint adhere to more firmly.The finished product enameled aluminium flat wire that technology of the present invention makes, tack is good, and heating is few, has higher thermal shock resistance properties and good anti-refrigerant, solvent resistance.Also have insulating properties the same and good electrical conductivity with copper strap wire.

Embodiment

It is a raw material with the aluminium astragal for the present invention, according to the following steps processing:

1), flattens; By pressure roller the aluminium astragal is pressed into the lenticular wire base that the cross section is a rectangle;

2), cold-drawn; Adopt the cold-drawn wire-drawing equipment will go up the lenticular wire base drawing moulding that step makes, wherein the width at the mould outlet place of cold-drawn wire-drawing equipment, height dimension are bigger by 4～6% than width, the height dimension of lenticular wire target size, take-up;

3), softening; To go up at the uniform velocity unwrapping wire of step lenticular wire, by softening furnace, softening temperature is 480～520 ℃ in anaerobic or low-oxygen environment;

4), cooling; With the temperature that continues operation is that 480～520 ℃ lenticular wire immerses in above-mentioned anaerobic or low-oxygen environment in 20～30 ℃ the water; The blowing of dried up back, drying;

5), prime; On dry lenticular wire, evenly apply 1731 polyester lacquer, drying;

6), be coated with finish paint; On the lenticular wire that scribbles priming paint, evenly apply 1754 or 1765 polyester lacquer, drying; Take-up makes.

Claims (1)

1. the processing technology of enameled aluminium flat wire, it is a raw material with the aluminium astragal, it is characterized in that, according to the following steps processing:

1), flattens; By pressure roller the aluminium astragal is pressed into the lenticular wire base that the cross section is a rectangle;

2), cold-drawn; Adopt the cold-drawn wire-drawing equipment will go up the lenticular wire base drawing moulding that step makes, wherein the width at the mould outlet place of cold-drawn wire-drawing equipment, height dimension are bigger by 4～6% than width, the height dimension of lenticular wire target size, take-up;

3), softening; To go up at the uniform velocity unwrapping wire of step lenticular wire, by softening furnace, softening temperature is 480～520 ℃ in oxygen-free environment;

4), cooling; With the temperature that continues operation is that 480～520 ℃ lenticular wire immerses in above-mentioned oxygen-free environment in 20～30 ℃ the water; The blowing of dried up back, drying;

5), prime; On dry lenticular wire, evenly apply 1731 polyester lacquer, drying;

6), be coated with finish paint; On the lenticular wire that scribbles priming paint, evenly apply 1754 polyester lacquer, drying; Take-up makes.