Tool holder for a spark erosion machine tool

Details Tool holder for a spark erosion machine tool Tool holder for a spark erosion machine tool

1976-12-13

1978-06-13

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69V, 308 3A, 308 6R, B23P 108

Patent

active

040950794

ABSTRACT:
An assembly such as a tool head for a spark erosion profiling machine tool comprises an elongate tool holding member having first and second opposed lengthwise bearing surfaces and third and fourth opposed lengthwise bearing surfaces. By way of example the member can be square, the bearing surfaces then being the four long sides of the member. The member is partly housed in a housing wherein there are mounted bearings which support the member for movement in the direction of its length with respect to the housing. The bearings can comprise discrete circulating roller bearing shoes and they are in abutting contact with the member at five positions in the region of each of two planes spaced apart along the length of the member by a calculated optimum distance. In each plane, two of the abutting contact positions are on the first bearing surface, one is on the second surface, and the other two are on respective ones of the third and fourth surfaces in the region of a plane which is about midway between the first and second surfaces. The housing can be in one piece or it can comprise a part having a base and side walls defining a channel, and a part forming a cover for the mouth of the channel.

REFERENCES:
patent: 2342946 (1944-02-01), Tourneau
patent: 2918333 (1959-12-01), Friedman
patent: 3353875 (1967-11-01), Kange
patent: 3363083 (1968-01-01), O'Conner
patent: 3389625 (1968-06-01), Wagner

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