Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1978-11-07
1980-09-23
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
5116587, 5116593, B24B 4904
Patent
active
042234840
ABSTRACT:
An electronic control apparatus for internal grinders wherein, with the workpiece fitted on slippers, a hole diameter gauger is provided. The gauger consists of two symmetric, linear transducers, by which the positions of both ends of a diameter are separately sensed. A measuring instrument is provided along the axis of wheelhead unit feeds, referred to the diamond truing position. The above defined electronic, control apparatus includes means by which the displacements of rotation axis from one, to another workpiece, caused by the changes in the diameter of same piece, are obtained from the signals of the two linear transducers. An analogic inverter, by which the sign of signal of one of the transducers is reversed, and an analogic adder, in which said reversed sign signal and the signal of other transducer are added with one another are provided. Means are provided for deriving the position of truing diamond relative to workpiece (considered along the axis of feeds), from the gaugings of hole diameter, from the traversings of grinding wheel, and from the traversings of workpiece rotation axis. Means are included for the utilization of results of the measurements and of the position, for controlling the operating cycle. When the workpiece is not fitted on slippers, the means as herein before stated, for deriving the displacements of rotation axis from one, to another workpiece, caused by the changes in the O.D. of same piece, from the signals of the two linear transducers, are not included in the electronic control apparatus.
REFERENCES:
patent: 3774349 (1973-11-01), Uhtenwoldt
patent: 3842545 (1974-10-01), Possati
patent: 3898440 (1975-08-01), Fukuma
patent: 4018010 (1977-04-01), Pozzetti et al.
Giardino Loris
Giardino Vittorio
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