Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1993-01-05
1994-06-14
Rachuba, M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
511658, 511659, 76 48, B24B 4900
Patent
active
053198859
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a machine for finishing circular saw blades in multiple steps, comprising respect to the retainer member and designed for carrying out different operations on teeth of the saw blade, and
In a known machine of this kind (DE 29 40 730 A1) a retainer means for a saw blade is disposed between a soldering device and a pair of flank grinders. For repair of a saw blade furnished with hard metal plates, first of all those teeth having a damaged hard metal plate are moved successively into the operating range of the soldering device to remove these hard metal plates. Subsequently, all the plate seats which have become free are subjected to further treatment by a seat grinder which is located diametrically opposite the soldering device, just like the flank grinders. This is followed by attaching new hard metal plates, again by means of the soldering device and, finally, these hard metal plates are ground by the two flank grinders at the tooth flanks and, if necessary, in a subsequent operating step at the tooth back as well. During all this, the saw blade always is clamped between two hydraulically operable clamping jaws directly adjacent the tooth on which the flank grinders are working.
It is the object of the invention to shorten the machining time of a saw blade whose teeth must be subjected to a plurality of successive grinding operations.
Starting from a machine of the kind described initially, this object is met, in accordance with the invention, in that tooth each of the saw blade, saw blade, respectively, before the grinding devices engage the saw blade.
In this manner all the teeth can be subjected to several grinding finishes in a single revolution of the saw blade, for example to grinding on the back of the tooth at one of the two machining stations and grinding at each of the two lateral flanks of the tooth at the opposite machining station. It proved to do no harm that in this way approximately half of all the teeth are ground at their tooth backs prior to having their flanks ground, whereas the order is inverted with the grinding finishes of the remaining teeth.
In a preferred embodiment of the invention the clamping devices are movable from an operative position in which they are ready to clamp the saw blade into an inoperative position in which the saw blade can be slipped on or withdrawn from the retainer member in axial direction. In this manner the exchange of the saw blade is greatly facilitated because, contrary to the way of proceeding thus far, it is not necessary to introduce the saw blade in its own plane between clamping jaws of a clamping device before the saw blade can be slipped on its retainer.
Conveniently, the clamping devices are adapted to be swung back and forth parallel to themselves between their operative and inoperative positions by a slewing device each.
The machine according to the invention prefereably is developed further in that disposed on a first common carriage whose distance from the diametrically opposed grinding device with its associated clamping device is variable in a diametral direction of the saw blade, and device are disposed on a second common carriage which is adjustable parallel to the saw blade transversely of the direction of movement of the first carriage.
An embodiment of the invention will be described in greater detail below, with reference to diagrammatic drawings, in which:
FIG. 1 is a front elevational view of a machine for finishing circular saw blades;
FIG. 2 is the lateral view in the direction of arrow II in FIG. 1;
FIG. 3 is an enlarged cutout of FIG. 1, showing further details;
FIG. 4 is the corresponding top plan view in the direction of arrow IV in FIG. 3;
FIG. 5 is a circuit diagram including hydraulically operated devices of the machine.
The function of the machine illustrated is to subject the saw blades 10 of circular saws to stepwise machining, with a respective tooth 12 each intended to be ground at its tooth back 14 and a tooth 16 approximately diametrically opposite this one to be ground at both its tooth fl
REFERENCES:
patent: 1051153 (1913-01-01), Nelson
patent: 2637223 (1953-05-01), Gustin
patent: 3526157 (1970-09-01), Rachal
Beck Ernst
Lenard Peter
Reimann Hans-Joachim
Riehlein Fritz
Rachuba M.
Vollmer Werke Maschinenfabrik GmbH
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