Sheet metal worker is a type of work among workers. Some people call it sheet metal work. In the past, a sheet metal worker was actually a fitter. They combine various metal plates such as steel plates and copper plates into handicrafts or workpieces by hand, so people call people who make workpieces with metal plates sheet metal workers. Due to the continuous development of modern science and technology, the classification of many jobs has changed. Sheet metal workers pay off, cut and shape various sheets or profiles according to actual needs or drawings, thus forming various required three-dimensional components, such as ventilation pipes in buildings, cyclone dust collectors with big bent heads and small joints in factories, plastic repair of automobile repairs and various civil white iron products. Sheet metal workers need profound knowledge of mathematics, geometry, metal welding, cutting, locksmith, riveting and so on.