Copper contact tip, the color is purple, but not entirely pure copper, sometimes it also adds a small amount of deoxidation elements or other elements to improve the material and performance, so it is also a copper alloy. At present, domestic copper processing materials can be divided into four types according to the composition: oxygen-free copper, deoxidized copper, ordinary copper and special copper with a small amount of alloying elements. Copper is widely used in the production of conductive and thermal equipment. It is also used in some non-oxidizing acids, bases, salt solutions and a variety of organic acids, which have good corrosion resistance and are used in the chemical industry. Although the electrical and thermal conductivity of copper is second only to silver, it has good weldability, and can be made into various semi-finished products and finished products by cold and thermoplastic processing.

        Chromium zirconium copper contact tip, with high strength, hardness, conductivity and thermal conductivity, and wear resistance, crack resistance and softening properties, after a long time after treatment hardness, strength, conductivity and thermal conductivity are significantly improved, easy to weld. Widely used in motor commutator, welding machine, seam welding machine and so on.

        Chromium zirconium copper contact tip, has good electrical conductivity, thermal conductivity, high hardness, wear resistance and explosion resistance, crack resistance and high softening temperature, welding electrode loss is less, welding speed is fast, the total cost of welding is low, suitable for welding welding machine electrode related accessories, in Europe and the United States welding gun, mainly with copper conductive contact tip, mainly used in Europe and the United States protective gas to argon gas mixture. The arc is long, the gas cooling performance is poor, the main way of the failure of the conductive contact tip is caused by the micro arc between the hole wall of the conductive contact tip and the welding wire, so the conductive copper with better conductive conductivity is used as the conductive contact tip, and the CO2 gas is used as the protective gas in Asia, the arc is short, the gas cooling ability is strong, and the conductive contact tip is mainly chromium zirconium copper on the welding gun in Japan and South Korea. Japan believes that the failure of the conductive contact tip is mainly caused by the friction loss between the inner hole wall of the conductive contact tip and the welding wire, so the harder chromium zirconium copper material is mainly used. Since China mainly uses CO2 gas as a protective gas, chrome zirconium copper conductive contact tip should be selected. The national standard for the conductive contact tip is 9mm, but most of the existing conductive contact tip on the domestic market is far lower than this standard, the process standard is uneven, resulting in the conductive contact tip inner hole wall burr, the wire is not smooth, good conductive contact tip in the unit price is relatively high but the reaction in the service life, is often several times the general conductive contact tip. It also reduces the disadvantages of frequent replacement of the conductive contact tip (time saving). The most important thing is that the good welding effect greatly improves the production efficiency, and brings greater development and benefits to the production enterprises!

Comparison of life of conductive contact tip

1. Material is the main reason affecting the life of the conductive contact tip. The conductivity test confirmed that the conductivity of the common copper contact tip on the market is only about 80%IACS, which is far lower than the national standard, so the service life is low.

Good conductive contact tip copper material/chromium zirconium copper material strictly implement national standards, conductivity above 100%IACS, so it has a long service life.

2. The manufacturing process is the second reason that affects the life of the conductive contact tip. The forming of holes is the bottleneck of making conductive contact tip. Due to the difficulty in forming the inner hole of the conductive contact tip, the "extrusion forging" forming method of the copper pipe with larger aperture is generally adopted in our country. The so-called "extrusion forging" is to insert a steel wire with a suitable diameter into the copper pipe with a large hole, rotate the copper pipe at one end, reduce the inner hole of the copper pipe by reducing the outer diameter of the copper pipe, and finally extract the steel wire to make the hole shape.

This production method only partially solves the forming problem of the inner hole of the conductive contact tip, and has disadvantages. See Figure 1 - Common market conductive contact tip. The conductive contact tip is suitable for welding wire diameter of 0.8mm. The aperture on the right side of the contact tip after extrusion forging is 1.01mm, which is the working part of the contact tip. The left aperture without extrusion forging is 1.39mm, the hole depth is 18mm, and this part is basically not working. It is calculated that the length of the non-working part of the hole accounts for 40% of the total length, which greatly reduces the life of the conductive contact tip.

 The good conductive contact tip is produced by copper tube produced by patented technology. The diameter of the inner hole of the copper tube is as small as 0.9mm, and the aperture is consistent and smooth on the full length of the conductive contact tip, which greatly improves the service life of the conductive contact tip.

Combined with the above two life factors, the service life of the good conductive contact tip is more than double that of the common conductive contact tip on the market.

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