Working Drawings Working drawings are complete sets of standardized drawings specifying the manufacture and assembly of a product.

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Read Chapter 8 – Working Drawings Working drawings are complete sets of standardized drawings specifying the manufacture and assembly of a product. Working drawings for mechanical devices include assembly drawings, detail drawings, a bill of materials (BOM), and specifications. This assignment consists of eight separate drawings (two assembly drawings and six detail drawings) derived from the Ball Valve found on page 268.


Assembly Drawings Assembly drawings show how components fit together. They can show the product with all parts in their functional positions (fully assembled) or as an exploded view, which shows parts separated but aligned to their functional positions. Typically, hidden lines are omitted, and dimensional information is minimal. 


Drawing 1: An assembly section view of the Ball Valve and an isometric view of the fully assembled valve. Include a detail view around the stem. 


This type of view exposes the internal features and components of the fully assembled valve. Each nonstandard component receives section lining. Thin-walled nonstandard components receive a solid pattern. Include an isometric view of the assembled valve on the same layout. Do not include dimensions. Use the Hidden visual style. 


Drawing 2: An exploded view of the Ball Valve with balloons to label each part and a bill of materials. This type of view does not necessarily indicate the order of assembly, rather it indicates alignment of each part. Use centerlines to indicate alignment. A BOM or parts list is a tabular list that identifies all parts used in an assembly and provides information about individual parts. The BOM should reflect the part number, quantity, description, and material of each part. Do not include dimensions but remember to include balloons. Use the SE Isometric perspective and Hidden visual style.

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