Expandable tool holding device using a fusible alloy

Details Expandable tool holding device using a fusible alloy Expandable tool holding device using a fusible alloy

1990-09-20

1991-07-09

Briggs, William

Gear cutting, milling, or planing

Milling

With cutter holder

279 2R, 279 2A, 408240, B23B 3140

Patent

active

050300482

ABSTRACT:
An expandable tool holding device for holding a tool or workpiece in which the clamping force is brought about by the solidification and expansion of a fusible alloy. The alloy is contained in an expansion chamber defined in part by a thin-walled, expansion sleeve. The alloy has a low melting point and expands when it solidifies. The pressure caused by expansion of the fusible alloy radially expands the expansion sleeve causing the expansion sleeve to grip the tool or workpiece. To release the tool, the alloy is heated and liquified so that the expansion sleeve returns to an unexpanded condition.

REFERENCES:
patent: 3790152 (1974-02-01), Parsons
patent: 3989260 (1976-11-01), Zonkov
patent: 4262917 (1981-04-01), Ottestad
patent: 4387906 (1983-06-01), Nicolin
patent: 4629378 (1986-12-01), Parsons
patent: 4677792 (1987-07-01), Speidel
Hertel SE-Drill, The Ultimate Performance Drill Brochure.
Schunk, Ultra Precision Hydraulic Chucks/Expanding Arbors Brochure.

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