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Basic Assembly Constraints & Concepts

Basic Assembly Constraints & Concepts. Mate/Flush. Insert. Angle. Tangent. Assembly constraints are parameters that define the geometric relationships between components in a CAD assembly. These constraints include:. A component floating in space has six degrees of freedom :.

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Basic Assembly Constraints & Concepts

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  1. Basic Assembly Constraints & Concepts

  2. Mate/Flush Insert Angle Tangent Assembly constraints are parameters that define the geometric relationships between components in a CAD assembly. These constraints include:

  3. A component floating in space has six degrees of freedom: • 3 rotations around the X, Y, and Z axes. • 3 translations along the X, Y, and Z axes. Degrees of freedom are systematically removed in an assembly until only the desired components are allowed to move.

  4. Mate Constraint • Constrains two faces, edges, points, or axis together. • The red arrows represent normal vectors and point towards each other.

  5. Flush Constraint • Constrains two faces or work features together. • Normal vectors will point in the same direction.

  6. Angle Constraint • Constrains two faces or edges at an angle to one another. • Normal vectors parallel to each other equal 0° angle.

  7. Insert Constraint • Constrains a cylinder flush into a hole.

  8. Tangent Constraint • Constrains a curved surface to a plane or another curved surface.

  9. Base Component • The first component placed in an assembly should be a fundamental part or sub-assembly, such as a frame or base plate, on which the rest of the assembly is built. • The first component in an assembly file sets the orientation of all subsequent parts and subassemblies.

  10. Grounded Component • When the first component is placed in the assembly, its origin is coincident and aligned with the assembly coordinate origin. • All degrees of freedom are removed from the first component. • The base component will be grounded and should be left that way.

  11. Patterning Component • This function duplicates one or more components and arranges the resulting occurrences in a circular or rectangular pattern.

  12. Replace Component • In the design process, one often needs to replace one or more components in an assembly. • The new component is placed in the same location as the original component, but assembly constraints may be deleted in the process.

  13. Editing Components • When you double click on a component, you will exit the assembly environment and enter the part environment. The other components in the assembly will become translucent. • When you are finished editing the part, you will exit the part environment and return to the assembly environment.

  14. Subassemblies • A group of components that are constrained to act as one component in a larger assembly.

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