Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1981-04-14
1983-10-04
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51123R, 511311, 51237R, B24B 504
Patent
active
044070950
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to machine-tool industry, and more particularly it concerns devices for abrasive cleaning of blanks shaped as bodies of revolution, for example, ingots, electrodes, forgings and the like, having cylinrical, taper and barrel shape.
BACKGROUND ART
At present widely known in the art are snagging grinders used for cleaning blanks (see, for example, N. I. Sheftel et al. "Otdelka sortovogo prokata" /Finishing of Sections/, Moscow, Metallurgia Publishers, 1974, p. 131).
The grinder comprises a wheelhead whose spindle mounts a rotating tool, viz., an abrasive wheel, and a table movably mounted on horizontal guides of a bed. Installed on the table are steady and movable stands having rollers to receive a blank. The rollers of the front stand are coupled through a reduction gear with a drive imparting a rotary motion to the blank. The movable stand makes a set-up movement depending on the blank length. The table is given a longitudinal feed from hydraulic cylinders.
However, such grinder cannot be used for simultaneous working of a blank with two wheelheads due to its design. Moreover, as the blank is positioned on the rollers the reliable transmission of rotation to the blank is not ensured due to its slipping and the pressure of the tool on the blank is limited in the process of machining, which decreases the quality of cleaning of the blank and the grinder capacity.
There is also known a cylindrical grinder (see, for example, N. S. Acherkan, "Metallorezhuschie stanki" /Metal-Cutting Machine Tools/, Moscow, Metallurgia Publishers, 1965, V. I, pp. 227-232).
Grinding on this grinder is performed with an abrasive wheel the axis of which is positioned parallel or at an angle to the axis of the blank, the wheel is given a continuous rotary motion and a periodic translational motion in the direction perpendicular to its axis, whereas the blank mounted on centers of the headstock and footstock is given a feed motion. However, only one tool can be used on this grinder to make work, which limits labour productivity.
DISCLOSURE OF THE INVENTION
The present invention is essentially aimed at providing a device for abrasive cleaning of blanks shaped as bodies of revolution, in which a headstock would be installed so as to allow two oppositely disposed wheelheads to be simultaneously brought to the blank, thereby radically increasing the machining efficiency.
This is achieved by a device for abrasive cleaning of blanks shaped as bodies of revolution, comprising a wheelhead with a rotating tool, a movable table mounting a headstock and a footstock carrying centers for a blank, and a blank rotation drive, according to the invention a second wheelhead is mounted opposite to the first wheelhead, and the table is provided with a steady stand and two guides disposed in a vertical plane passing through the line of centers and rigidly connected with the footstock and the stand, the headstock being mounted on the guides and adapted to move along them.
It is expedient that the stand mount hydraulic cylinders whose rods are connected with the headstock.
The employment of the stand and two guides rigidly connected with the footstock makes it possible to have the axis of the centers located high above the table and in such a way as to provide space for arrangement of two large diameter wheelheads with a powerful drive. An increase in the diameter of the tool prolongs the service life thereof, i.e., the time of its continuous operation. An increase in the power of the grinding wheel drive improves the wheel metal removing capacity. Besides, the use of two guides allows the structure of the footstock to have a narrower width, which enables blanks of small diameter to be machined.
The use of the movable headstock makes it possible to clamp blanks of different length with an effort sufficient for transmitting the torque and to get rid of other holding means blocking the passage for the tools.
The invention is also characterized by the fact that the table, in the middle portion thereof, has a
REFERENCES:
patent: 790705 (1905-05-01), Schrader
patent: 1011478 (1911-12-01), Olsen
patent: 2072970 (1937-03-01), Thom
patent: 3066456 (1962-12-01), Ramge
patent: 3105288 (1963-10-01), Johnson
patent: 3779109 (1973-12-01), Gibert
Bobovnikov Nikolai G.
Burmakin Viktor I.
Chirkin Alexandr F.
Gubin Petr V.
Lukyanov Anatoly A.
Adolphson K. Bradford
Whitehead Harold D.
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