Normally, the casing of small generators is made of cast steel, and the casing of large generators is made of welded steel plates. The materials of motor casing generally include cast iron and cast aluminum alloy. Section steel (steel pipe), steel plate, etc. Domestic low-power motors generally use cast iron, cast aluminum alloy, and shaped steel (steel pipe) casings. The workpiece processing volume is large, the processing procedures are many, and the production cycle is long; the operator's working environment is poor in sanitary conditions and labor intensity is high; energy waste is large, and materials are used. Waste of fire. Internationally, developed countries such as Germany, France, Japan and other countries have already adopted steel casings in large quantities as early as the middle of this century. This new type of casing processing technology is a very minimal machining process. Some domestic motor manufacturers began to study the manufacturing of steel plate casings in the early 1970s, and formed a certain batch size in the mid-1980s. However, since what is used is shearing - pressing the "U" shape (or pressing the "W" shape) - pressing the "O" shape, electric welding (manual or carbon dioxide shielded welding) - polishing - turning - 118 The block shaping process solution (referring to the chassis without feet) uses many types of equipment, has a large proportion of artificial factors that affect quality, and makes quality assurance difficult. At present, some developed countries have generally adopted advanced special processing equipment for steel plate casing manufacturing, which has a high degree of mechanization and automation and good quality. Low-power motors appearing in the motor market in advanced countries are generally steel plate casing motors. In 1989, China began to trial-produce steel plate casing processing equipment - steel plate casing rounding machines, motor steel plate casing welding machines and other stand-alone machines. In recent years, materials have been expensive and the domestic motor market has been weak. In order to reduce the cost of motor manufacturing, improve the quality of steel plate casings, and introduce my country's small-power motors into the motor market of developed countries and occupy this market, it is necessary to conduct research on new manufacturing processes for motor steel plate casings.