Abstract: A common task when designing computer-aided design (CAD) assemblies is to ensure that the tolerances applied to each component are such that the assembly will function as expected when the parts are made to the extremes of their tolerance zones. The disclosed methods and systems automatically generate dimension and tolerance information for fastened components. Given a source component with dimensions and tolerances, the dimensions and tolerances are automatically applied to mating entities of a target component such that fit is insured without interference when the parts are manufactured at worst case, or at the extremes of their tolerance zones.

Abstract: A common task when designing computer-aided design (CAD) assemblies is to ensure that the tolerances applied to each component are such that the assembly will function as expected when the parts are made to the extremes of their tolerance zones. The disclosed methods and systems automatically generate dimension and tolerance information for fastened components. Given a source component with dimensions and tolerances, the dimensions and tolerances are automatically applied to mating entities of a target component such that fit is insured without interference when the parts are manufactured at worst case, or at the extremes of their tolerance zones.

Abstract: Automatic generation of a tolerance scheme includes accessing data defining a three-dimensional model that defines a part for manufacture, identifying a tolerance feature in the three-dimensional model, determining at least one unconstrained degree of control for the tolerance feature, automatically creating a tolerance scheme for the tolerance feature, and rendering the tolerance scheme and the three-dimensional model in a window such that the tolerance scheme annotates the tolerance feature. The tolerance scheme is based on an engineering standard for communicating a tolerance and constrains the unconstrained degree of control.

Abstract: Determining a minimum condition and a maximum condition of an assembly of parts includes determining a subset of the assembly of parts, constructing a tolerance chain comprised of tolerance features associated with the parts and that have tolerances that can assume maximum and minimum values, setting at least one tolerance to a minimum value or a maximum value, and calculating the minimum condition and the maximum condition of the assembly based on the setting of the tolerance.

Abstract: Determining a minimum condition and a maximum condition of an assembly of parts includes determining a subset of the assembly of parts, constructing a tolerance chain comprised of tolerance features associated with the parts and that have tolerances that can assume maximum and minimum values, setting at least one tolerance to a minimum value or a maximum value, and calculating the minimum condition and the maximum condition of the assembly based on the setting of the tolerance.

Abstract: Automatic generation of a tolerance scheme includes accessing data defining a three-dimensional model that defines a part for manufacture, identifying a tolerance feature in the three-dimensional model, determining at least one unconstrained degree of control for the tolerance feature, automatically creating a tolerance scheme for the tolerance feature, and rendering the tolerance scheme and the three-dimensional model in a window such that the tolerance scheme annotates the tolerance feature. The tolerance scheme is based on an engineering standard for communicating a tolerance and constrains the unconstrained degree of control.