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US 5,066,173 AGranted
Aluminum piston wrist pin boring tool
AssigneeGTE Valenite Corporation
InventorsCharles Gaffan, Bruno K. Schwarzpech
Life of this patent
Estimating the term…
Abstract
Piston wrist pin boring tool including semi-finish and finish inserts mounted in individual cartridges adjustably secured in cartridge pockets provided in the boring bar. A carbide shank is brazed to a body provided with a cartridge pocket, and a diamond tip for the finishing insert is provided with a closely controlled flat neutral rake cutting edge supplied with coolant from central passages through the bar.
Claims11
An aluminum wrist pin boring tool having an axis of rotation, comprising:
- a. An adapter;
- b. a shank attached to said adapter and concentric therewith, said shank passing through said adapter and having a passage extending longitudinally through the length of said shank;
- c. a cartridge means for mounting semi-finish and finish boring inserts characterized by said finish inset having a cutting tip with a linear flat cutting edge, said cartridge means being attached concentrically with said shank and having a series of interconnecting branch passages, said branch of passages in communication with said shank passage and open at the cartridges to allow flow of coolant through to the boring inserts, said semi-finish insert positioned ahead of center with approximately a 5.degree. negative effective radial rake and a 5.degree. positive axial rake, and said finish insert having approximately a 5.degree. negative effective radial rake and a neutral "0" axial rake, said finish insert further characterized in that said flat cutting edge extends in a closely held range from a line parallel to said axis to a 1/2.degree. backward outward slope.
Dependencies are inferred from the claim text.