蜜臀av一区二区三区有限公司_国产激情视频网站_性欧美精品中出_又大又长粗又爽又黄少妇视频_日本污视频网站_久草视频福利在线_在线观看国产精品一区_69av.com_瑟瑟视频在线观看_天天干天天操天天拍

The bending of metal stamping parts is a processing method of bending flat plates, pipes, and profiles into workpieces with a certain angle or shape using molds or other tools. It is one of the basic stamping processes and occupies a large proportion in the production of metal stamping parts; There are various types of parts that are formed by bending, such as car beams, bicycle handlebars, door and window hinges, various electrical brackets, etc;

There are many curved shapes for metal stamping parts, including V-shaped parts, U-shaped parts, Z-shaped parts, O-shaped parts, and other shaped parts; The bending method varies depending on the equipment and mold used; Bending forming is usually carried out on mechanical presses (punches), friction presses, or hydraulic presses, as well as on specialized equipment such as bending machines, rolling machines, pipe bending machines, and tension bending machines;

The characteristic of bending on a press is that the tool moves in a straight line, known as bending; The bending forming on some specialized equipment, where the tool rotates, is called bending, rolling, or rolling