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US 6,767,168 B2Granted
Method and apparatus for forming openings in a workpiece
AssigneeROLLS-ROYCE plc
InventorRaymond T. Miller
Life of this patent
Estimating the term…
Abstract
A method and apparatus associated with forming a blade attachment slot in a gas turbine engine turbine disk. The method further includes a full-form finish honing that produces a blade attachment slot free of broach ripples. The apparatus includes a broach carrier and cutting inserts coupled to the support. The cutting inserts are interchangeable and can be replaced when worn or damaged. The carrier has integral support members for bracing the cutting inserts. Each cutting insert has lateral support surfaces to prevent the cutting insert from moving laterally within the cutting insert assembly. Further, the broach assembly can be used as a replacement for damaged portions of a broach. The cutting inserts can be manufactured utilizing a fixtured EDM process.
Claims37
A broach assembly, comprising:
- a carrier body having a plurality of integral support members aligned in a row and spaced along said carrier body;
- a plurality of spacers aligned in said row and coupled to said carrier body, one of said plurality of spacers being located between an adjacent pair of said plurality of support members, said pair of said plurality of support members defining a first support member and a second support member, and said one of said plurality of spacers abutting said first support member;
- a cutting insert disposed between said second support member and said one of said plurality of spacers, said cutting insert being wedged between said one of said plurality of spacers and said second support member, and wherein said second support member braces a substantial length of said cutting insert during broaching;
- and
- wherein said plurality of support members and said plurality of spacers and said cutting insert are aligned in said row which extends in the direction of travel for cutting.
2 more elements
A broach, comprising:
- a broach bar having a first portion including a plurality of integrally formed cutting teeth and a second receiver portion defining a section free of integrally formed cutting teeth;
- and
- at least one broach assembly having a plurality of removeable cutting inserts mechanically coupled thereto, said at least one broach assembly coupled to said broach bar in said second receiver portion.
A broach assembly, comprising:
- a carrier body having a plurality of integral support members aligned in a row and spaced alone said carrier body, said plurality of integral support members includes a plurality of pairs of adjacent integral support members, wherein each of said pair of support members including a first support member and a second support member;
- a plurality of spacers aligned in said row and coupled to said carrier body, each of said plurality of pairs of support members has one of said plurality of spacers located therebetween and abutting said first support members of each of said pairs of support members;
- and
- a plurality of cutting inserts, wherein one of said plurality of cutting inserts is disposed between said second support members of each of said pairs of support members and said one of said plurality of spacers, and further wherein each of said cutting inserts is wedged between said one of said plurality of spacers and said second support members of each of said pairs of support members, and wherein each of said second support members braces along a substantial length of said cutting insert.
1 more element
A broach assembly, comprising:
- a carrier body having a plurality of integral support members aligned in a row and spaced alone said carrier body;
- a plurality of spacers aligned in said row and coupled to said carrier body, one of said plurality of spacers being located between an adjacent pair of said plurality of support members, said pair of said plurality of support members defining a first support member and a second support member, and said one of said plurality of spacers abutting said first support member;
- and
- a cutting insert disposed between said second support member and said one of said plurality of spacers, said cutting insert being wedged between said one of said plurality of spacers and said second support member, wherein said cutting insert has a lateral support surface which contacts said support member and said lateral support surface has a contour which minimizes lateral movement of said cutting insert, wherein said contour of said lateral support surface includes a v-shaped profile, and further wherein said second support member braces a substantial length of said cutting insert during broaching.
1 more element
A broach assembly, comprising:
- a carrier body having a plurality of integral support members aligned in a row and spaced alone said carrier body;
- a plurality of spacers aligned in said row and coupled to said carrier body, one of said plurality of spacers being located between an adjacent pair of said plurality of support members, said pair of said plurality of support members defining a first support member and a second support member, and said one of said plurality of spacers abutting said first support member;
- and
- a cutting insert disposed between said second support member and said one of said plurality of spacers, said cutting insert being wedged between said one of said plurality of spacers and said second support member, wherein said cutting insert has a lateral support surface which contacts said support member and said lateral support surface has a contour which minimizes lateral movement of said cutting insert, wherein said contour of said lateral support surface includes a serrated profile, and further wherein said second support member braces a substantial length of said cutting insert during broaching.
1 more element
Dependencies are inferred from the claim text.