The main ways to realize the precision machining of parts are: using high-precision machining machine tools to process high-precision parts; Use error compensation technology to improve the machining accuracy of parts. Mechanical processing mainly includes manual processing and numerical control processing. “Sheet metal is a comprehensive cold working process for sheet metal (usually less than 6mm), including shearing, punching / cutting / compounding, folding, welding, riveting, splicing and forming (such as automobile body) Etc. Its remarkable feature is that the thickness of the same part is consistent. The products processed by the sheet metal process are called sheet metal parts. The way to distinguish whether a part is a sheet metal part or a machined part on a mechanical drawing is to see whether the thickness of the part is consistent. The thickness of sheet metal parts is consistent, while the thickness of machined parts is inconsistent.
The sheet metal drawing and part drawing must be drawn by the first angle projection method. It is not allowed to use the third angle drawing in the departure Bay. Unless the customer’s drawing is in a picture format or PDF file format that is difficult to convert, but the third angle view must be clearly marked, otherwise it will be implemented in accordance with the first angle. The drawing method of holes in the sheet metal drawing shall comply with the national standard drawing method and relevant regulations.
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