Assembly drawings are patterns of the machine or it's components. It is mainly used to present its working principle and assembly relation. In machine's design process, the drawing of assembly drawings is before the parts drawings. The assembly drawing represents the different contents from the component drawing.It is mainly used in the assembling, debugging, installation, maintenance and other occasions.It also is a kind of important technical documents in the production with extraordinarily logics.
An assembly drawing is needed for all products or inventions that have more than one part. These drawings list all parts and sub-assemblies that make the final product. A BOM (Bill of Materials) on the drawing lists each part number, part name, and part quantity.
Some of these drawings provide instructions on how to assemble the product at amanufacturing level, while others may list part numbers for consumers to re-order parts. Instructions may include information such as how to fasten parts together, or what types of lubricant to use.