人人爽人人爽人人片av免费,中文字幕乱伦,国产午夜福利伦理300,欧洲成人亚洲,亚洲福利网站,国内精品伊人久久久久7777,国产精品一级黄色片,国产精品综合久成人,久久成人18免费网站,亚洲无码偷拍,亚洲欧美日韩综合网导航

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