Boots – shoes – and leggings
Patent
1991-10-07
1994-05-24
Smith, Jerry
Boots, shoes, and leggings
36447435, 318593, 82134, G06F 1546, B23B 2100
Patent
active
053155262
ABSTRACT:
A numerically controlled lathe capable of machining a workpiece by numerically controlling a machining table provided with a machining tool. In order to prevent a local uneven abrasion of parts, which make a sliding contact, due to a mass production of workpieces having a simple form or a machining in a non-circular shape, there are provided a main carriage and a sub carriage. A machining tool is positioned on the sub carriage, and the sub carriage traverses on the main carriage along an axis which the main carriage and the sub carriage have in common. When a circular machining is carried out, the main carriage and the sub carriage respectively traverse by an equal amount in directions opposite to each other, and the cutting tool is constantly maintained at a position designated by an instruction. At the time of a non-circular machining, the main carriage and the sub carriage respectively traverse in directions opposite to each other; moreover, the sub carriage rapidly traverses in response to an instruction designating a location of the tool. Thus parts which make a sliding contact are evenly worn out by shifting the relative positions of both the main and sub carriages.
REFERENCES:
patent: 4250779 (1981-02-01), Feller et al.
patent: 4602540 (1986-07-01), Murofushi et al.
patent: 5085109 (1992-02-01), Hidehiko et al.
Hanaki Yoshimaro
Iwasaka Seiichi
Maeda Yutaka
Garland Steven R.
Okuma Corporation
Smith Jerry
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