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Basic Assembly

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

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Basic Assembly

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  1. Basic Assembly

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

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

  4. Mate Constraint • Constrains two faces, edges, points, or axes together • Red arrows represent normal vectors and point toward 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 • First component placed in an assembly should be a fundamental part or subassembly • E.g., a frame or base plate, on which the remainder of the assembly is attached • First component in an assembly file sets orientation of 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 • Base component will be grounded and should be left that way

  11. Patterning Component • Function duplicates one or more components • Arranges the resulting occurrences in a circular or rectangular pattern

  12. Replace Component • Design process is often non linear, so one or more components in an assembly may need replacement • New component placed in the same location as the original component, but assembly constraints may be deleted

  13. Editing Components • Double click on a component to exit the assembly environment and enter part environment • Other components in the assembly will become translucent • When finished editing a part, exit the part environment and return to the assembly environment

  14. Subassemblies • Group of components constrained to act as one component in a larger assembly

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