External abrasive machine

Details External abrasive machine External abrasive machine

1999-12-30

2001-06-05

Hail, III, Joseph J. (Department: 3723)

Abrading

Machine

Rotary tool

C451S180000, C451S231000

Reexamination Certificate

active

06241590

ABSTRACT:

The present invention relates to an external abrasive machine, i.e. a machine tool designed for removing material from the outer envelope surface of a substantially cylindrical or annular work piece and/or from flanges associated therewith, and particularly an external grinding machine for grinding the outer surface and/or flanges of bearing rings and of the type defined in the preamble of the accompanying claim
1
.
Abrasive machines such as grinding machines, lapping machines, honing machines, milling machines, etcetera, are known in many slightly different designs and embodiments. It is desirous that the machine is compact and as space-saving as possible. For obtaining a good machining result it is on the other hand important that the co-operating parts of the machine have a high mutual stiffness and low tendencies of vibration. These last-mentioned properties are often obtained by giving the machine a heavy bedding and a sturdy and robust design, and therefore these two requirements are often contradictory to the desires for compactness and space-saving properties.
The purpose of the present invention is to provide an external abrasive machine which fulfils these, partly contradictory properties, and this has been obtained by giving the machine the features defined in the accompanying claim
1
.
In this manner it has been possible to achieve very sort distances within the machine, which means that inexactness caused in conventional machines, e.g. by thermal influence and material elasticity in long shafts etcetera, is reduced to a minimum, thereby giving the machine a superior precision.
Hereinafter the invention will be further described with reference to an embodiment schematically shown in the accompanying drawings.


REFERENCES:
patent: 3817149 (1974-06-01), Reutlinger
patent: 4854087 (1989-08-01), Riha
patent: 5259156 (1993-11-01), Ronen
patent: 1 232 135 (1971-05-01), None

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