Chapter 6. Assemblies

6.1 Introduction

Products are made up of components (parts) that are assembled together. We manufacture the parts first, and then we assemble them. Similarly, in CAD, we create the parts individually and assemble them to create an assembly model. An assembly is a collection of parts positioned and oriented correctly relative to each other. Assemblies can be created by assembling parts, subassemblies, or both. For example, a universal joint has four parts: center block, yoke, pin, and bushing. A car has many parts (such as tires and rims) and subassemblies (such as steering system and engine).

Assembly modeling is different from part modeling in multiple ways. The most distinctive differences are creating mates and the ...

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