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1、Automobile manufacturers welding application of new technologies with the overall development trend Welding is a modern mechanical manufacturing process a necessary way to get car manufacturers at a wide range of applications. Automobile engine, gearbox, axle, frame, body, inside the six can not be
2、separated from the total Chengdu welding techniques. At the manufacture of automotive components, spot welding, projection welding, seam welding, roll welding, arc welding electrodes, CO2 gas shielded arc welding, argon arc welding, gas welding, brazing, friction welding, electron beam welding and l
3、aser welding, etc. types of welding methods, because of spot welding, gas shielded arc welding, brazing with the production volume is very large, a high degree of automation, high-speed, low power, welding deformation of small, easy-to-use features, so the coverage of auto body sheet metal parts is
4、particularly suitable, so , in automobile production in the most widely used. Investment costs at about 75% in spot welding, other welding methods account for only 25%. With the development of the automobile industry, auto-body welding production line is also gradually develop in the direction to th
5、e fully automated, in order to catch up with international standards, improve productivity at the same time, requires efforts to improve the quality of automobile manufacturers. As we all know, implementation is a prerequisite for automated manufacture of parts and components to high precision, the
6、smallest hope of welding distortion, welding sites want fresh appearance, and called for more and more high-welding technology. Facing our countrys accession to WTO opportunities and challenges, welding area of the popularization and application of new technologies for the automotive industry to enh
7、ance the brand has an extremely important role.First, the auto industry used welding methods and the application of parts andcomponents Automotive applications are welding industry noodle one of the most widely used method of welding a wide range of applications as follows: 1. Resistance Welding (1)
8、 Spot welding used mainly for body assembly, flooring, doors, side Wai Wai after, the former bridge and small parts. (2) Multi-spot welding for body baseboard containing boxcar doors, engine cover and trunk cover. (3) Projection welding and roll welding for body parts, shock absorber stem, brake sho
9、e, screws, nuts and small, such as stents. (4) Seam welding the body cap for rain canopies, shock absorber head, fuel tank, muffler and oil, such as disk. (5) For butt welding steel, was discharged into the air stem, cutting tools, etc. 2. Electric arc welding (1) CO2 arc welding for the car, rear a
10、xle, frame, shock absorber stem, beam, shell and tube rear axle, drive shaft, hydraulic cylinders and jacks, such as welding. (2) Welding for the oil plate, aluminum alloy parts for welding and repair welding. (3) Electric arc welding electrode for thick parts such as stents, spare tire racks, trail
11、ers and so on. (4) Submerged for half-bridge casing, flange, and natural gas vehicles, such as pressure vessels. 3. Special welding (1) Friction welding for automotive stem, rear axle, axle, steering rod and the attendant tools. (2) For electron beam welding gear, after the bridges. (3) Laser Weldin
12、g for Body backplanes, gear, materials and spare parts under the edge and so on. 4. Oxyacetylene welding Repair welding for body assembly. 5. Brazing For radiators, copper and steel parts, hard alloy welding.Two, the automobile industry welding application of new technologies Nowadays, the automobil
13、e industry a lot of advanced welding technology, only to set out the relevant body welding and welding of new technologies. 1. Resistance and control of energy-saving technology (1) Conjoined hanging spot welding in the automotive industry the most widely used are hanging spot welding machine, a wor
14、kshop is often dozens or hundreds of units, mostly in its capacity above 100kVA, automotive sheet metal at the welding has been widely applications. (2) Of resistance welding machine current resistance welding machine communicate substantial use of the single-phase AC 50Hz power supply, large capaci
15、ty, low power factor. The development of three-phase low-frequency resistance welding machine, three-phase secondary rectification welding contacts (in ordinary type spot welder, seam welder, welding machine application convex) and the IGBT inverter resistance welding machine, you can solve the imba
16、lance and improve power grid power factor (up to 0 9 above) the problem. At the same time can be further save power, the realization of microcomputer control parameters can be better applied to welding of aluminum alloy, stainless steel and other difficult to weld metal welding. It could also further reduce the equipment weight. (3) The control of resistance against the Southwest Jiao
