Shrinkage fit type tool holder
AssigneeMST Corporation
InventorHaruki Mizoguchi
Life of this patent
Estimating the term…
Abstract
A shrinkage-fit tool holder having a tool holder body 11 having a portion 2 adapted to be connected to a machining center, a manipulator-engaging portion 3, a chuck portion 4 and a tool-holding member 6 for firmly holding a shank of a cemented carbide tool by shrinkage fitting, at least the tool-holding member 6 being made of specialty steel having an austenitic structure that is strengthened by precipitation hardening or work hardening.
Claims17
A tool and tool holder assembly comprising (a) a tool holder body having a portion adapted to be connected to a machining center, a manipulator-engaging portion and a chuck portion;
- (b) a tool-holding member mounted to said tool holder body;
- and (c) a cemented carbide tool having a shank with a first thermal expansion coefficient,
- said tool-holding member firmly holding said shank of said cemented carbide tool by shrinkage fitting, at least said tool-holding member being made of specialty steel having an austenitic structure that is strengthened by precipitation hardening or work hardening, said tool-holding member having a second thermal expansion coefficient equal to or more than said first thermal expansion coefficient of said shank of said cemented carbide tool plus 9.1×10−6/° C.
A tool and tool holder assembly comprising (1) a tool holder having a portion adapted to be connected to a machining center, a manipulator-engaging portion, a chuck portion and a tool-holding portion integrally formed in a front portion of said chuck portion and (2) a cemented carbide tool having a shank with a first thermal expansion coefficient,
- said chuck portion firmly holding said shank of said cemented carbide tool by shrinkage fitting, at least said tool-holding portion being made of specialty steel having an austenitic structure that is strengthened by precipitation hardening or work hardening, said tool-holding portion having a second thermal expansion coefficient equal to or more than said thermal expansion coefficient of said shank of said cemented carbide tool plus 9.1×10−6/° C.
Dependencies are inferred from the claim text.