Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1989-12-08
1992-06-09
Kisliuk, Bruce M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 95GH, 51105GG, 51287, 51288, 409 18, 409 22, B23F 504, B23F 2312
Patent
active
051195941
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a grinding machine for continuous roll grinding of gears.
A high-quality is the precondition for high efficiency in gears, high transmission precision, high power-load ratio, high carrying capacity and low noise development. The hardening of gears leads on one hand, to higher carrying capacity of the tooth flanks, but, on the other hand, produces distortion. For this reason continuous roll grinding has been increasingly used for some time in the finishing of gears, even large gears, since thereby can be obtained the desired gear quality after hardening. In addition this permits tooth flanks to be ground for correct profile.
The normal roll grinding machines used at present in production make the grinding process very time consuming and costly.
Already known is a process for continuous roll grinding of Reisshauer AG (Forschungsvereinigung Antriebstechnik, 1979, Increase of Efficiency of the Tooth Flank Grinding Process, pages 7 ff.).
In this process the tool is a grinding worm having a precise rack and pinion profile.
The grinding worm and the gear are each driven by a separate synchronous reaction motor. The involute shape of the tooth flank is produced by the rolling off of the grinding worm and the gear. During the up and down movement of the workpiece carriage the workpiece is ground. The grinding worm is gradually blocked up at the upper and lower reversal points. The advance of the grinding worm can be continuously adjusted within fixed limits. The grinding process develops continuously. It is not interrupted by any partial operations.
In order to make fresh grinding zones mesh with the gear, the grinding worm is guided along its axis of rotation past the gear. The grinding worm can be dressed by means of two rotating discs having a diamond coating or two separate diamonds after the whole of the grinding worm has been traversed, that is, when the grinding worm has been guided along its axis of rotation past the gear. The dressing of the grinding worm is very important in relation to the processing expenses during the loading periods.
The problem to be solved by the present invention is to reduce the time of processing and the cost for the continuous roll grinding of a gear and to create a precondition for an automatic loading of a roll grinding machine.
According to the invention this problem is solved by a transmission that connects, without play, a spiral toothed hypoid drive for the workpiece and a rotary drive for a grinding worm and that the grinding worm is continuously dressed during the grinding operation.
With these measures there is obtained a simple and clear coordination of the position of grinding worm and gear, thus creating an essential precondition for the automatic loading of a roll grinding machine. Since the gear is connected without play with the grinding worm by a mechanical transmission, there is a clear coordination between a clamping fixture of the gear and the grinding worm. Due to the continuous dressing of the grinding worm during the continuous roll grinding operation, the grinding worm constantly meshes with fresh grinding zones in the gear to be ground, and the grinding worm no longer needs to be fully traversed and, as a result, the coordination of the position of the grinding worm with the position of the gear is substantially simplified.
There has been disclosed a gear processing method (Swiss 650183) having a common drive for the tool and the workpiece. The invention proposes a transmission between a spiral toothed hypoid drive of the workpiece and a tool drive in order to make possible the transmission of the high speeds of 1,900 r.p.m. occurring in the continuous roll grinding.
Since in addition the full traverse of the grinding worm has been eliminated as result of the continuous dressing and the extension of the grinding worm along its axis of rotation can be substantially less, advantages are obtained for a rotation of the grinding worm and thus for processing precision in the continuous roll grinding.
The operation of a small grinding worm
REFERENCES:
patent: 1759333 (1930-05-01), Wildhaber
patent: 1879196 (1932-09-01), Greene
patent: 3200711 (1965-08-01), Rogg
patent: 3232169 (1966-02-01), Bradner
patent: 3453931 (1969-07-01), Campbell
patent: 3487584 (1970-01-01), Rickenmann
patent: 3717958 (1973-02-01), Ellwanger
patent: 3740899 (1976-06-01), Sorokovsky et al.
patent: 3813821 (1974-06-01), Takahoshi
patent: 3877176 (1975-04-01), Kotthaus
patent: 3992937 (1973-11-01), Jaeger
patent: 4195446 (1980-04-01), Angst
patent: 4559744 (1985-12-01), Wirz
patent: 4606682 (1986-08-01), Miller
patent: 4635404 (1987-01-01), Wirz
patent: 4765095 (1988-08-01), Weiner
patent: 4799337 (1989-06-01), Kotthaus
Kisliuk Bruce M.
Marlott John A.
Zahnradfabrik Friedrichshafen AG
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