Title:
工作機械バイトの設計
Document Type and Number:
Japanese Patent JP2013510730
Kind Code:
A
Abstract:
A machine tool bit, such as a tool for drilling, milling, reaming or tapping or the like comprising a work portion (71) and a shank (73) extending from the work portion. The shank (73) is provided with one or more regions of reduced mechanical torque strength. Such regions can be for example, a reduced diameter (74), axial or longitudinal slots (84, 114), reduced cross sectional area (97), bores (94), annular notch or groove (63, 65), or a slot. The shank is preferably constructed with these features such that the transverse stability of the tool bit is greater than a machine tool bit in which an equivalent reduction in mechanical torque strength is achieved by a mere reduction in diameter of the shank. Technically, the Polar moment of inertia (resistance to torsion) of the modified shank is greater than the polar moment of inertia of a shank with a mere reduction in diameter of the shank. The notches, recesses, grooves, bores or the like may further be filled with a material (75) to provide additional transverse stability to these one or more regions of reduced mechanical torque strength.
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Inventors:
Giscus Simon Dean
Kilpatrick Ian Luck Run
Kilpatrick Ian Luck Run
Application Number:
JP2012538139A
Publication Date:
March 28, 2013
Filing Date:
November 10, 2010
Export Citation:
Assignee:
Giscus Simon Dean
Kilpatrick Ian Luck Run
Kilpatrick Ian Luck Run
International Classes:
B23B51/00; B23C5/10; B23D77/00; B23G5/06
Domestic Patent References:
| JPH0663230U | 1994-09-06 | |||
| JPS60153711U | 1985-10-14 |
Attorney, Agent or Firm:
Koichi Washida