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, and the thickness of machined parts is inconsistent.

Sheet metal is a comprehensive cold processing process for metal sheets (usually less than 6mm), including shearing, punching/cutting/compositing, folding, welding, riveting, splicing, forming (such as automobile bodies), etc. Its distinctive feature is that the thickness of the same part is consistent. Machined parts refer to the process of accurately removing material through machining machinery. Part thickness is inconsistent.

Extended information

Both sheet metal drawings and parts drawings must be drawn using the first angle projection method. Third-angle drawings are not allowed to be distributed to the workshop for use, unless the customer's drawings are in image format or PDF file format that are difficult to convert, but the third-angle view must be clearly marked, otherwise the first-angle view will be used. The drawing method of holes in sheet parts drawings complies with the national standard drawing method and related regulations.

A drawing can generally only express a piece of mold sheet. When the mold sheet (or pads) with the same function is divided into several parts, fill in the total number of pieces in the parts quantity column in the picture frame (for example, the pads have Fill in as many as you like).

In addition, number them directly below the view to show distinction, such as CC-1, CC-2, etc. If the materials of several parts are different, you need to indicate "Material: ***" below the number. If the materials of several parts are the same, just fill in the material column in the title bar of the picture frame.

Baidu Encyclopedia - Sheet Metal Parts

Baidu Encyclopedia - Machining

Baidu Encyclopedia - Mechanical Drawing