Different Types of Machinery Drawings

I decided that I would look into the different ways to draw machinery to give me an idea of how I could approach drawing the brewing equipment.


Exploded/Working/Assembly drawings


“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.” (source: My Product Engineer)
“The drawings that are used to give information for the manufacture or construction of a machine are called as working drawings.Working drawings must include all the knowledge for the production of a machine or structure explicitly so that no further information is required to complete the production.” (source: M.E.T.U)


Cross Section/ Sectional 


“Section or cross section drawings show a product as if it has been sliced in half. The imaginary cut is called a section plane which is sometimes represented by a line consisting of long and short dashes.
A section drawing shows how a product is constructed. Parts of the object that are cut through are shaded by cross-hatching. The cross-hatching lines must be at 45° and spaced 4mm apart. If two parts touch, then the cross-hatching goes in opposite direction. Parts such as nuts and bolts and axles are not normally sectioned.” (BBC)


Isometric Projection



“A representation of a 3D solid on a 2D surface is called a projection. Isometric projection uses vertical lines and lines drawn at 30° to horizontal. A 30° set square is used to ensure accuracy. Dimensions are shown accurately and in the correct proportion. This makes it easy to draw the projection to scale from a plan view. Isometric projection distorts shapes to keep all upright lines vertical.” (BBC)



Screen Shot 2016-03-23 at 23.46.04


“Plan drawings show a view from above, looking down. They are used for room plans, site plans and maps. They often use symbols and a key to represent parts of the plan such as trees, furniture or buildings. Northsoutheast and west should also be shown.” (BBC)



Screen Shot 2016-03-23 at 23.46.09

“Perspective drawings make objects appear more realistic, as they appear to recede as they get further away. If the receding lines are extended they will meet at points that are called vanishing points.” (BBC)

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