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Sumark Industrial Co.,Ltd. [China (Mainland)]
Business Type:Manufacturer
City: Taizhou
Province/State: Zhejiang
Country/Region: China (Mainland)
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Automotive welding application of new technologies with the overall trend
Welding is a necessary modern machinery manufacturing process method, widely in automotive applications. Car engines, transmissions, axles, frame, body, six total Chengdu car without welding technology. This paper describes a new welding technology, automobile manufacturing and the application of the general trends.
Welding is a necessary modern machinery manufacturing process method, widely in automotive applications. Car engines, transmissions, axles, frame, body, six total Chengdu car without welding technology. In the manufacture of automotive parts, spot welding, projection welding, seam welding, projection welding rolling, welding arc welding, CO2 gas shielded arc welding, arc welding, gas welding, brazing, friction welding, electron beam welding and laser welding, and other types of welding methods, as spot welding, gas welding, brazing has produced large, high degree of automation, high-speed, low power, welding deformation is small, easy to operate features, so the cover sheet for automotive body parts particularly suitable, so , the most widely used in automobile production. Investment costs in the spot in about 75%, only 25% of other welding methods.
With the auto industry, auto body welding production lines are fully automated direction gradually, in order to catch up with international standards, to improve production, we request that efforts to improve the quality of automotive manufacturing. As we all know, the premise is to automate the manufacture of precision parts and components to very high hopes minimum welding distortion, welding parts look to be fresh, and called for increasing welding technology. China s accession to the WTO is facing opportunities and challenges, welding in the promotion and application of new technologies to enhance the brand of the automotive industry has an extremely important role.
A welding method used in the automotive industry and parts of the application
Automotive industry is the most widespread application of welding one of the industries, the use of a wide range of welding methods, its application as follows:
1 Resistance Welding
(1) spot welding is mainly used for body assembly, flooring, doors, side panels, the latter around, front axle and small parts.
(2) Multi-spot for the underbody, trucks cars, doors, hood and trunk cover.
(3) convex projection welding and roll welding for body parts, shock absorber stem,brake shoes, screws, nuts and small such as a stent.
(4) seam welding for body rain canopy cover, shock absorber seals, fuel tank, muffler and oil pan, etc.
(5) welding for steel ring, discharged into the air valve stem, cutting tools and so on.
2 arc welding
(1) CO2 welding for the trunk, rear axle, frame, shock absorber stem, beam, shell and tube rear axle, drive shafts, hydraulic cylinders and jacks welding.
(2) TIG for the oil pan, aluminum welding and repair welding of parts.
(3) electrode arc welding for thick parts such as brackets, spare tire racks, frames, etc.
(4) submerged arc welding for the half-pipe, flanges, pressure vessels and other natural gas vehicles.
3 special welding
(1) friction welding for automotive valve stem, rear axle, axle, steering rod and the attendant tools.
(2) for electron beam welding gear, rear axle.
(3) Laser Welding for underbody, gear, parts, materials and trimming the next and so on.
4. Oxyacetylene welding
Welding for body assembly.
5 brazing
For the radiator, copper and steel, carbide welding.
Second, the automobile industry in the new welding technology
Today, the automotive industry a lot of advanced welding technology, just to name abody welding and welding related to new technology.
1 resistance welding control technology and energy-saving
(1) conjoined hanging spot welding is the most widely used in the automotive industry hanging spot welding machine, a workshop is often tens or hundreds, mostly in its capacity above 100kVA, in the automotive sheet metal welding has been widely the application.
(2) a lot of resistance welding machine current resistance welding machine AC 50Hz single-phase AC power, large capacity, low power factor. Development of three-phase low-frequency resistance welding machine, three-phase secondary rectifier contact welding (in ordinary type spot welder, seam welding machine, welding machine in the application) and IGBT inverter welding machine, can solve the power imbalance and improve the Power factor (up to 0 9 or above) the problem. At the same time can be further save energy and help achieve the parameters of the computer control, can be better suited for welding aluminum, stainless steel and other difficult to weld metal welding. It may also further reduce the weight of equipment.
(3) the control of resistance welding Southwest Jiaotong University, aluminum rims for a factory rim butt welding developed into a PLC (programmable controller) intelligent controller, the original machine was modified to address the welding of aluminum alloy rim quality problems and improve welding productivity. Developed PLC after the same factory seam welding controllers, general clean-up required to solve parts of the seam welding problems. Through the development of these two controllers, single-chip microcomputer that the PLC controller than anti-interference ability, high reliability; IPC controller than the small, low cost, using a common frequency of single-phase AC resistance welding machines completed the difficult work of welding and seam welding.
(2) a lot of resistance welding machine current resistance welding machine AC 50Hz single-phase AC power, large capacity, low power factor. Development of three-phase low-frequency resistance welding machine, three-phase secondary rectifier contact welding (in ordinary type spot welder, seam welding machine, welding machine in the application) and IGBT inverter welding machine, can solve the power imbalance and improve the Power factor (up to 0 9 or above) the problem. At the same time can be further save energy and help achieve the parameters of the computer control, can be better suited for welding aluminum, stainless steel and other difficult to weld metal welding. It may also further reduce the weight of equipment.
(3) the control of resistance welding Southwest Jiaotong University, aluminum rims for a factory rim butt welding developed into a PLC (programmable controller) intelligent controller, the original machine was modified to address the welding of aluminum alloy rim quality problems and improve welding productivity. Developed PLC after the same factory seam welding controllers, general clean-up required to solve parts of the seam welding problems. Through the development of these two controllers, single-chip microcomputer that the PLC controller than anti-interference ability, high reliability; IPC controller than the small, low cost, using a common frequency of single-phase AC resistance welding machines completed the difficult work of welding and seam welding.
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