Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1991-07-18
1993-02-09
Kisliuk, Bruce M.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51218A, B24B 326
Patent
active
051844311
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an appliance for the grinding of workpieces, especially tools, such as, for example, for the grinding of drills, with a machining device, for example a double grinding unit, and with a receiver assigned to this and intended for the workpiece
The main problem of appliances of this type is to bring the workpiece to be machined to an exact and desired angle relative to the machining device and to maintain it there. Even today, for example, drills are resharpened by hand on a grinding block, how the drill is moved in relation to the grinding wheel still being left to the skill and experience of the machinist. The cutting geometry plays a very considerable part in these very situations.
The inventor's object was to develop an above-mentioned appliance, by means of which a workpiece to be machined can be brought at any angle up to a corresponding machining device, so that extremely versatile machining becomes possible.
To achieve this object, the machining device is assigned a basic stand for the guidance of a carriage, on which is fixed a further guide serving for guiding a further carriage which is itself assigned a lathe attachment or a rocker holder with an axis of rotation, connected to a bearing pedestal, on which the receiver or a quick-change holder is arranged.
The carriages moveable in the guides as a rule execute a movement in the x-axis and y-axis respectively. The two axes of rotation allow the workpiece to be machined to be assigned to all the other angles of this plane.
In a preferred exemplary embodiment, the bearing pedestal is so connected to the lathe attachment that an axis of rotation is formed here too.
A pivoting of the bearing pedestal through 180.degree. in the C-axis thereby becomes possible. This guarantees any possible angular position of the workpiece in relation to the machining device.
In addition, the receiver and bearing pedestal will also form yet another axis of rotation with one another. Since the axis of the receiver is exactly in line with the axis of the lathe attachment, this last-mentioned axis of rotation makes it possible to insert into the receiver longer workpieces to be machined which would otherwise strike against the lathe attachment when being inserted through the receiver.
In a preferred exemplary embodiment, the receiver itself is rotatable about its longitudinal axis and, furthermore, forms an axis of rotation with a fork. The fork connects the receiver to the bearing pedestal.
All the axes of rotation are to be assigned corresponding scale rings, and moreover it is intended to make it possible to release the individual rotatable parts by means of quick-acting chucking levers or clamping screws.
The guides for the carriages are so designed that they consist of a threaded spindle and of two guide rails. The threaded spindle and guide rails pass through the carriages, the threaded spindle meshing with a corresponding internal thread in the carriage. The guide rails run free of play and are sealed off against dirt by means of concertinas.
Each threaded spindle is assigned a rotary grip with appropriate scaling, this rotary grip rotating the threaded spindle. A fine adjustment of the carriage thereby becomes possible. At the same time, the scaling can be reset to zero.
However, it is also intended to provide a rapid adjustment of each carriage. For this, a lever with an appropriate engagement profile for the threaded spindle passes through the carriage. When this lever is lifted out counter to the force of a spring or a cup-spring assembly and, if appropriate, locked by pivoting, the engagement with the threaded spindle is cancelled and the carriage can be moved along on the guide rails. Fixing near the desired position is then obtained again by releasing the lever, so that the profile engages into the thread flights of the threaded spindle. Fine adjustment then takes place once more via the rotary grips.
Moreover, all the rotatable and moveable parts are clampable, whether by corresponding clamping screws or by quick-acting chucking levers
REFERENCES:
patent: 2432058 (1947-12-01), Wiken
patent: 3073076 (1963-01-01), French
patent: 3680268 (1972-08-01), Lorton
patent: 4769955 (1988-09-01), Reiling
Combrowski Zbigniew
Hamma Armin
Kisliuk Bruce M.
Lavinder Jack
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