With the high-performance copper alloy and high-efficiency automatic welding technology applied to a large number of major electromechanical equipments such as automobiles, rail transit, aerospace, etc., the internal and surface quality of copper alloy welding wire, welding uniformity and stability requirements are getting higher and higher. . At present, most of the high-end copper alloy welding wire used in the above-mentioned fields in China comes from imports, and its price is more than twice that of the same kind of domestic welding wire. This is mainly because the domestic copper wire production process, tooling and so on are relatively backward, so that the inner and surface quality of the wire has a certain gap compared with the welding wire of developed countries. In the automatic wire feeding MIG welding or robot welding process, the wire feeding stability is poor, the wire surface is easy to fall off the chip and the conductive nozzle, resulting in automatic welding arc breaking, welding splash and welding arc extinguishing, welding process is poor, can not be applied to high-end Automated welding.
General Manager of Xinlide (Tianjin) Metal Products Co., Ltd.
Since 2007, our company has gradually phased out the old production equipment, using advanced equipment and technology, so that the internal and surface quality of the welding wire has a qualitative leap, fully meeting or exceeding the quality level of imported welding wire.
The company uses new equipment and processes that produce high quality wire as follows:
(1) The high-precision German imported inverted water tank wire drawing machine is used to carry out the drawing of the welding wire. The precision of the equipment is high, the degree of automation is high, the surface roughness of the wire drawing guide wheel, the fixed speed wheel and the tower wheel is good, the hardness is high, and the surface of the wire is not damaged, and the weight of the continuous production shaft wire can reach 500kg. The wire drawing dies used are all new polycrystalline dies. The characteristics of the new polycrystalline mold are: 1 high hardness and long service life. 2 The surface roughness is good, and the light surface roughness of the drawn wire is good. 3 dimensional stability is good.
(2) The mechanical scraping photo-illumination process is an advanced process for the production of copper alloy wire (the scraping die adopts a new polycrystalline die), which can scrape off defects such as oxide layer, fatigue layer and water absorbing layer on the surface of copper alloy wire, and improve copper alloy. The roughness of the surface of the wire further improves the process performance and weldability of the wire.
(3) Production of copper alloy wire strands by horizontal continuous casting. The alloy is melted in a melting furnace, and after chemical analysis in the furnace, it is poured into a holding furnace and continuously cast into a φ 12 mm strand. Due to the continuous casting slab, the consistency and uniformity of the alloy composition are guaranteed.
(4) According to the different alloy grades, different stretching and annealing processes are adopted to ensure the uniformity and consistency of the metallurgical structure of the wire after multiple deformations and annealing of the copper alloy wire before the finished product.
(5) The layer winding machine representing the international advanced level is used to carry out the close-packing of the welding wire. The wire after winding is better than the standard (GB/T9460, American standard AWS A5.7, German standard DIN1733). The two important indexes after layer winding are as follows: the rising circle is φ 600～φ 800mm (standard requirement is φ 400 ~ φ 1200mm); squat <8mm (standard requirements <25mm).
After the above improvement measures, the produced wire can fully meet the standard requirements of high-end welding wire and can completely replace imported products. The company's products have been exported to the United States, Germany and other developed countries. In China, some car manufacturers are also using our silicon bronze wire and aluminum bronze wire.
Our company is a professional manufacturer of copper alloy welding wire. The main products include more than 20 kinds of TIG/MIG welding wire of pure copper, brass, bronze and white copper. Products are widely used in automotive, marine, locomotive, rail transportation, chemical, metallurgical and aerospace.
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