Method of making a wafer broaching tool
AssigneeNew Venture Gear, Inc.
InventorBrian M. Fitzgerald
Life of this patent
Estimating the term…
Abstract
A finish broaching tool for finish cutting helical splines on the interior of an annular workpiece has a multiplicity of groups of circumferentially disposed teeth. Each group of circumferentially disposed teeth is formed on an individual wafer adapted to be mounted on the trailing end of a conventional broaching bar. The teeth of each wafer are formed on a predetermined helical angle and are adapted to helically align with the teeth of the other wafers. The wafers are sized so as to provide contact between the teeth of two or more wafers throughout substantially the entire finish broaching process.
Claims20
A method of making a tool for use in cutting internal helical splines, said method comprising the steps of:
- providing a plurality of annular wafers each having teeth formed on an outer peripheral portion thereof;
- and
- forming a keyway segment with respect to said teeth on each of said plurality of wafers.
A method of making a tool for cutting helical splines on the inner diameter of an annular workpiece and which is adapted to mount on a trailing end of a broach bar, said method comprising the steps of:
- grinding a plurality of wafers to include a desired tooth profile, each wafer of said plurality of wafers having teeth formed on an outer peripheral surface thereof;
- sequentially forming a keyway segment in each wafer of said plurality of wafers relative to said teeth formed thereon such that alignment of each of said keyway segments forms a first continuous keyway extending through each of said plurality of wafers;
- providing a shell having an inner diameter and an outer diameter and a second continuous keyway communicating with said outer diameter, said outer diameter adapted to receive said plurality of wafers such that said second continuous keyway is alignable with said first continuous keyway to form a locking channel;
- mounting each of said plurality of wafers on said shell;
- aligning adjacent wafers to form a plurality of helically aligned rows of teeth;
- and
- inserting a key through said locking channel for maintaining the helical alignment of said plurality of helically aligned rows of teeth.
A method of making a tool of the type for cutting helical splines on the inner diameter surface of an annular workpiece, the method comprising the steps of:
- grinding teeth on each of a plurality of cutting wafers and a lead wafer;
- forming a keyway segment in said lead wafer and each of said plurality of cutting wafers relative to said teeth formed thereon by:
- (a) establishing a first datum surface relative to said lead wafer;
- (b) placing a gage ball having a predetermined diameter in contact with adjacent teeth on said lead wafer, thereby positioning said gage ball at a constant height with respect to said lead wafer;
- (c) placing said keyway segment on an inner diameter of said lead wafer at a predetermined axial angle with respect to said gage ball;
- and
- (d) repeating sub-steps (a) through (c) for each consecutive one of said plurality of cutting wafers;
- providing a mounting member adapted to receive said lead wafer and said plurality of cutting wafers, said mounting member having a continuous keyway formed therein;
- mounting said lead wafer and said plurality of cutting wafers on said mounting member;
- aligning each said keyway segment formed in each of said lead wafer and said plurality of cutting wafers with said continuous keyway to form a channel;
- and
- inserting a key through said channel, thereby maintaining angular alignment of said lead wafer and said plurality of cutting wafers relative to said mounting member.
Dependencies are inferred from the claim text.