초록 ▼

This disclosure relates to a design methodology used in manufacturing a broaching tool for cutting slots in aerospace disk applications. The method includes modeling geometry of the slot and the broach tool, which is based upon an initial minimum tooth rise that is determined empirically for the par

This disclosure relates to a design methodology used in manufacturing a broaching tool for cutting slots in aerospace disk applications. The method includes modeling geometry of the slot and the broach tool, which is based upon an initial minimum tooth rise that is determined empirically for the particular disk material. The number of broach inserts and teeth per insert is calculated, and the broach inserts are modeled. The stresses and deformation of the lug are calculated in a finite elements environment based upon simulated incremental broach tool movements. If the lug is not within specifications based upon design constraints, then the broach tool is revised and the simulations are repeated until the slot is within the desired specifications.

대표청구항 ▼

What is claimed is: 1. A method for designing a broaching tool comprising the steps of:a) providing a geometry of a slot to be broached;b) providing a material dependent initial minimum tooth rise for a broach tool that includes multiple broach inserts,wherein the broach inserts include finish, semi

What is claimed is: 1. A method for designing a broaching tool comprising the steps of:a) providing a geometry of a slot to be broached;b) providing a material dependent initial minimum tooth rise for a broach tool that includes multiple broach inserts,wherein the broach inserts include finish, semi-finish and rough broach inserts, and determining the initial minimum tooth rise for the finish broach inserts,wherein the initial minimum tooth rise is greater than 30 μm for a coarse-grained alloy material with an average grain size larger than 25 μm, andwherein the initial minimum tooth rise is greater than 32 μm for a fine-grained alloy material with an average grain size smaller than 25 μm;c) calculating a number of broach inserts and teeth per insert based upon steps a) and b);d) solid modeling the broach inserts from step c);e) calculating the stresses on the broach tool and deformation of the slot;f) determining whether the slot dimensions are within desired specifications based upon step e); andg) revising the broach tool if the slot is outside the desired specifications, and performing steps c)-g) until the slot is within desired specifications; andh) manufacturing a broaching tool with design characteristics of the broach tool resulting from performing step a)-g).