- Detail drawings completely describe a single part with multiview orthographic projections
- Should provide all the information necessary to economically manufacture a high quality part
Assembly Drawings:
- Assembly drawings are used to the show the position and functional relationship of parts in an assembly, also via multiview orthographic projections
- Generally they have no dimensions on them
- Parts are 'balloon' identified and referenced to either detail drawings numbers or catalog numbers, via a Bill of Materials (BOM)
Section Views:
- Section views are used to clarify internal detail and to avoid dimensioning to hidden lines
- They are established by referencing a cutting plane
- Cutting planes depict the exact location on the part from which the section view will be projected, and should have associated arrowheads, indicating the direction from which the section view will be observed
- Cutting planes are constructed as an integral feature of the parent view, and cutting plane arrowheads always indicate the direction for the observer's line of sight
Crosshatching Section View:
- Crosshatching is a repeating graphic pattern which is applied throughout all areas of the part that would be in contact with the cutting plane. Thus, the hole is not crosshatched
- The recommended angle for the standard crosshatch pattern is 45, 30, or 60 degrees with horizontal. Similarly, crosshatch lines should be neither parallel nor perpendicular to the outline of the feature in section- if avoidable
Half Section:
- Half section views are the result of cutting planes being positioned on parts in such a manner that only half of the resulting view or projection is shown in section
- Half sections are generally used on objects of symmetry, individual cylindrical parts, or assemblies of parts
Offset Section:
- Offset sections allow us to provide greater breadth of detail with fewer section views. All of the features are aligned with the cutting plane
Coordinate Dimensioning and Tolerancing:
- The collective process of modeling, defining, and describing geometric sizes and feature relationships, and providing all of the required technical information necessary to produce and inspect the part is called dimensioning and tolerancing
