An assembly drawing is a type of technical drawing that illustrates how multiple parts fit together to form a complete assembly. It provides essential information for assembling a product, ensuring that components are correctly positioned and properly oriented relative to one another.
Key Features of Assembly Drawings
Assembly drawings typically include:
- Exploded or Sectional Views – These help visualize the relationships between parts by showing them slightly separated (exploded view) or revealing internal features (sectional view).
- Bill of Materials (BOM) – A list of all parts, including item numbers, descriptions, material specifications, and quantities.
- Reference Dimensions – Indicate overall size and critical fits without detailing every component’s dimensions (which are found in detail drawings).
- Fastener and Joining Details – Specifications for bolts, screws, welding, adhesives, or other joining methods.
- Annotations and Notes – Additional information, such as assembly sequence, tightening torques, or special handling instructions.
Types of Assembly Drawings
- General Assembly Drawing – Shows the overall configuration of a product, often using orthographic views.
- Exploded Assembly Drawing – Depicts components separated but aligned to show how they fit together.
- Sectional Assembly Drawing – Uses cutaway views to illustrate internal features and relationships between components.
- Working Assembly Drawing – Provides detailed assembly instructions, often for manufacturing or repair.
- Diagrammatic Assembly Drawing – Uses simplified symbols rather than realistic views to represent components and their connections (common in electrical or hydraulic systems).