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Galvanized Line Characteristic
Sep 04, 2017

EDM cutting processing as the mold manufacturing and metal processing industry essential processing means to improve the efficiency of EDM cutting has been the focus of its technological innovation.

The electrode wire as EDM cutting of the important supplies are more and more attention, especially the walking thread cutting processing. Can be said that the development of wire cutting technology, can not be separated from the simultaneous development of wire technology. As the brass wire as the field of cutting the first generation of professional wire in the field, as early as 1977 to enter the market sales, so from 1979, the invention of galvanized wire to today, the market continues to appear a variety of Ordinary brass wire performance better electrode wire, and most parts of the country will still be called wire cutting copper wire, or wire cutting copper wire, and these new coating electrode wire is called wire cutting galvanized line.

Features: The thermal physical properties of electrode wires are key to improving cutting efficiency. In the EDM cutting will produce a lot of heat, some of which heat is absorbed by the electrode wire away, which will reduce the cutting efficiency. If too much heat loss in the electrode wire, the wire will be due to overheating and fuse. So that the surface of the electrode wire is required to be rapidly vaporized and the thermal energy is released to the workpiece while the electrode wire is cooled. Material heat up to the melting point will be gasified, resulting in gasification pressure. The material with a low melting point is easier to vaporize and can help blow off the slag from the slit. When the electrode wire and the workpiece at the cutting surface is gasification rather than melting, the gas is generated rather than molten metal particles, can effectively improve the washing process, because the particles to wash away less.

So the electrode wire should have a typical characteristic is the low melting point and high gasification pressure, and metallurgists in the study of the electrode wire flushing to consider the two properties of the material are also the melting point and gasification pressure.

Since the low melting point zinc has a significant effect on improving the discharge performance of the electrode wire and the proportion of zinc in the brass is limited, it is thought that a layer of zinc is added to the outside of the brass wire, which produces a galvanized electrode wire. In 1979, several Swiss engineers invented this method, so that the development of electrode wire forward a big step forward, and led to the emergence of more new coating electrode wire.

The various characteristics of the brass wire determine its own some unavoidable defects: the processing speed can not be improved, the surface quality and machining accuracy are limited. At present, in Europe and the United States and Japan and other developed countries, mainly to galvanized electrode wire high-performance electrode wire is gradually replacing the brass wire. At the same time more and more users began to pay attention to the application of galvanized electrode wire. Compared with ordinary brass wire, the coating electrode wire has a great advantage:

(1) cutting speed is high, not broken wire. Good quality galvanized wire cutting speed can be 30-50% faster than brass wire.

(2) the workpiece surface quality is good, no plot of copper, deterioration of the layer to be improved, so the workpiece surface hardness is higher, the mold life extension.

(3) improve the processing accuracy, especially the sharp corners of the shape error, thick workpiece straightness error than brass wire has improved.

(4) guide wire nozzle and other parts of the loss, zinc hardness is lower than the brass, while galvanized wire does not like brass wire as a lot of copper powder, it is not easy to plug the guide wire Tsui, pollution related parts.

Third, under what circumstances should choose galvanized line?

1) processing tasks full, 24 hours boot;

2) lack of processing capacity, to be added to the new equipment, or the need for outward processing;

3) processing thickness is generally greater than 50mm;

4) processing requirements of high (precision, surface roughness);

5) processing hard alloy and other difficult to process materials;

6) with Agie, Charmilles, Ona, Mitsubishi, etc. have built-in galvanized wire processing parameters of the new equipment. Although these devices can use ordinary brass wire, but only the use of galvanized wire can really play the best performance of the equipment.