Abrading – Machine – Rotary tool
Patent
1999-01-22
2000-07-11
Hong, William
Abrading
Machine
Rotary tool
451260, 451280, 76 83, B21K 1700
Patent
active
060864656
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an apparatus for finishing a steel edge of a ski, consisting of a pot-shaped grinding wheel driven by a motor with an axis of rotation extending transverse to the feed direction.
BACKGROUND OF THE INVENTION
For finishing worn steel edges of a ski it is known (DE 39 14 977 A1) to use a pot-shaped grinding wheel driven by a motor with an axis of rotation inclined under an acute angle with respect to the feed direction and to the running surface of the ski, so that the ring-shaped end face of the grinding wheel rests against the outer machining surface of the steel edge merely in a peripheral portion. With such a setting of the grinding wheel there can be achieved a feed following the course of the side face of the steel edges waisted in longitudinal direction, but the grinding results remain unsatisfactory, because due to the waisted course of the steel edge the set angle changes over the length of the steel edge. Moreover, with such an apparatus merely the side faces of the steel edges, but not their machining surfaces on the side of the running surface can be ground.
BRIEF SUMMARY OF THE INVENTION
It is therefore the object underlying the invention to provide an apparatus for finishing a steel edge of a ski as described above such that a simple and precise grinding of the steel edge becomes possible not only at the outer machining surface, but also at the machining surface on the side of the running surface.
This object is solved by the invention in that the grinding wheel together with the motor is mounted in a frame of a setting means so as to be freely rotatable about a swing axis limited by a stop, which swing axis extends transverse to the feed direction and vertical to the axis of rotation of the grinding wheel, and that for setting the grinding wheel against the steel edge the setting means can be swivelled in the direction of the axis of rotation of the grinding wheel about a swivel axis parallel to the feed direction between two working positions on the one hand for the machining surface of the steel edge on the side of the running surface and on the other hand for the outer machining surface of the steel edge.
Since the grinding wheel is freely rotatable about a swing axis, which extends vertical to the axis of rotation of the grinding wheel and preferably likewise vertical to the feed direction, the grinding wheel can be set against the steel edge in a self-aligning way by means of the setting means such that it abuts in two peripheral portions disposed opposite each other with respect to a chord, which provides for an independent adaptation of the alignment of the grinding wheel with respect to the respective machining surface of the steel edge even in the waisted portion of the longitudinal side. The optional machining either of the machining surface of the steel edge on the side of the running surface or of the outer machining surface of the steel edge is effected by a swivel movement of the setting means, so that the axis of rotation of the grinding wheel is vertically aligned with respect to the respective machining surface. By correspondingly activating the setting means, for instance by means of an actuating cylinder, the grinding wheel can be set against the steel edge after the swivel movement, so as to independently follow the longitudinal course of the steel edge during the machining feed, which in particular in the waisted portion of the ski requires a corresponding readjustment via the setting means.
The setting means may be designed in various constructions, because it is merely important that the grinding wheel is properly set against the surface of the steel edge to be machined in direction of its axis of rotation. For this purpose, the setting means may consist of a carriage which can be moved on a sliding guideway parallel to the axis of rotation of the grinding wheel. In this case, the sliding guideway includes the swivel axis for the two working positions, so that the carriage is swivelled together with its sliding guide
REFERENCES:
patent: 4094101 (1978-06-01), Robinson
patent: 4679356 (1987-07-01), Thomas
patent: 4818839 (1989-04-01), Chastain
patent: 5136816 (1992-08-01), Beckingham
patent: 5597344 (1997-01-01), Bocquet
Hong William
Wintersteiger GmbH
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