Automotive body-in-white requirements for welding equipment Welding is an important process in the automobile manufacturing process, and its quality directly affects the safety and reliability of the product. Pull Down Faucets,Pull Down Faucets Price,pull down kitchen faucet Yuyao Zelin Sanitary Ware Co., Ltd , https://www.zelinfaucet.com
In terms of the manufacturing process of the body-in-white, the commonly used processes are: spot welding and projection welding in electric resistance welding, CO2 gas shielded welding, electrode arc welding, stud welding, laser welding, and plasma arc welding. Different welding processes have different performance requirements for their welding equipment, but they have common requirements in terms of basic capabilities: 1 The mechanical performance of the equipment is reliable and the program runs stably. 2 Welding parameters High-speed sampling, rapid analysis, rapid response, high-resolution parameter setting, and accurate and stable data communication. 3 control accuracy general requirements: & = maximum error absolute value δ w / set current As < 5 %. 4 For high-end equipment to have dynamic monitoring of output parameters, automatic correction and automatic output power compensation, form a closed-loop control, and monitoring and compensation accuracy can meet the process quality requirements, the general requirements ≤ 5%. 5 Three-phase load is balanced as much as possible, high power factor, energy saving and environmental protection. 6 with equipment safety and overload protection. 7 The maintenance cost is low, and the replacement of spare parts is convenient and fast. 8 small size, light weight, easy to install and handle.
Requirements for welding of white body to butt welding CO2 gas shielded welding is the most commonly used seam welding process in body-in-white welding. Most of them are thin-plate welding. Considering the cost when the process requirements are met, copper-plated solid wire is generally used. CO2 welding wire is not only a filling metal but also an electrode, so the welding wire must ensure a certain chemical composition and mechanical properties, and also ensure good electrical conductivity and process performance. Generally, the welding wire should have a stable and uniform deoxidizer component, the proportion is appropriate; the surface coating is uniform, no cracks, the contact resistance is stable; the wire feeding resistance is small, and the fusion bonding phenomenon of the contact nozzle is controllable.
Welding equipment should be selected and not selected. With the development of the domestic welding industry, the welding equipment technology has made great progress compared with the previous ones. The domestic welding equipment has been widely used in the automobile manufacturing industry. As we all know, most welding is a nonlinear, multi-variable coupling and a large number of random uncertain factors. To improve welding quality, it must be considered from the aspects of personnel skills, equipment technology and operating environment. Domestic welding equipment technology has developed rapidly in the past 20 years, and has been at the forefront of the world in some cutting-edge fields. The use of domestic equipment in the automotive industry has become quite common.
However, comprehensive analysis, in the high-end welding equipment research and development and manufacturing capabilities and industrial powers still have a big gap, and its industrial scale is also difficult to meet the needs of the domestic automotive industry development, such as: multi-functional automatic (semi-automatic) welding machine, special sets Welders, special welders and welding robots; at the same time, the stability and reliability of such equipment in the application process have yet to be improved, such as reducing the incidence of virtual welding of automatic stud welding machines.
From the current point of view, welding equipment at home and abroad have their own advantages in application. Domestic equipment: 1 R & D and manufacturing costs are relatively low, the price has a certain advantage, can reduce the factory's one investment. 2 The device operation interface generally has two modes, Chinese and English, which is easier to train and operate. 3 The spare parts procurement cycle is shorter and the cost is lower. 4 Major equipment failures are generally guaranteed to arrive at the site for repair service within 24 hours, and the maintenance cost is low.
Foreign equipment: 1 has many years of technical accumulation and practical engineering experience, and the equipment performance is relatively stable. 2 The service system is relatively complete.
Therefore, when selecting related equipment, products that are suitable for enterprise development should be selected according to the company's own situation and the welding characteristics of the products.