Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1982-11-15
1985-04-02
Olszewski, Robert P.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51351, 299 80, 408153, 82 59, B24B 508, B24B 3300
Patent
active
045078955
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an internal grainder for grinding an inner surface of a cylinder or a ring gauge, and more particularly to an internal grinder wherein a projection values of grind stones are adjustable.
BACKGROUND OF THE INVENTION
Heretofore, there have been known internal grinders for cutting or grinding an inner surface of a cylinder or a ring gauge. As shown in FIG. 1, the conventional internal grinder has been normally constructed such that a ring-shaped work 1 is clamped by a chuck 2 and rotated, an inner surface of the work 1 is ground by a grind stone 4 affixed to a spindle 3 movable in a diametral direction of this work 1 or along the inner surface thereof.
However, in the case of the conventional internal grinder with the above-described arrangement, grinding of the work 1 is concentrated at one portion, to which is abutted the grind stone 4, and hence, such disadvantages have been presented that it is difficult to achieve uniformalization of grinding and the work 1 tends to become elliptical.
Furthermore, in the conventional internal grinder, a spindle 3 of the grind stone 4 is moved in the diametral direction of the work 1 and along the inner surface of the work 1, whereby vibrations tend to be caused to the spindle 3, thus affecting the accuracy of grinding.
Further, as for the chuck 2, there have been many cases of adopting three-point chucks as shown in FIG. 1, whereby the work 1 cannot be clamped by the chuck 2 unless it is round-shaped, and troublesome centering work is required for the chuck 2 to clamp the work 1.
Moreover, the grind stone 4 has had to be often replaced with new one depending on the wear of the grind stone. In this case, rotation of the grind stone must be stopped each time replacement is effected, thus resulting in lowered workability.
The present invention has as its object the provision of an internal grinder, in which the center alignment of the work is simplified, grinding accuracy is improved, and the workability is excellent.
SUMMARY OF THE INVENTION
The present invention contemplates that, in an internal grinder comprising a grind stone head provided thereon with a plurality of grind stones in the rotating direction, a spindle secured at one end thereof with the grind stone head, a mount having work fixing means and a moving mechanism for moving relative positions of the spindle and the mount in the axial direction of the spindle, the grind stone head being constituted by a grind stone holding member for holding the plurality of grind stones in such a manner that the grind stones are respectively movable in the radial directions of the spindle, and a projection value adjusting member engageable with the plurality of grind stones, respectively, and capable of moving the plurality of grind stones, respectively, in the radial directions of the spindle when engaged positions of the grind stones are varied due to rotations of the grind stones relative to the grind stone holding member about the axis of the spindle as the work is simultaneously ground by the plurality of grind stones, whereby grinding is not concentrated at one portion, grinding is uniformly effected and the roundness of the finished surface is improved. Further, the projection value adjusting member and the grind stone holding member are rotated relative to each other, to simultaneously move the plurality of grind stones in the radial directions of the spindle so as to adjust the projection values of the grind stones, whereby grinding can be effected without moving the spindle in the diametral direction or along the inner surface of the work, so that vibrations of the spindle, which would render adverse influence to the grinding accuracy, can be avoided.
According to the present invention, in affixing the work onto the mount through the work fixing means, the plurality of grind stones are projected in the radial directions of the spindle to abut against the inner surface of the work, whereby the fixed position of the work is determined, thus eliminating the need f
REFERENCES:
patent: 1381416 (1921-06-01), Heindl
patent: 1652885 (1927-12-01), Allyn
patent: 2334838 (1943-11-01), Prange
patent: 2830413 (1958-04-01), Dahlerup
patent: 3216155 (1965-11-01), Sunnen
patent: 3393472 (1968-07-01), Sunnen
patent: 3469886 (1969-09-01), Marberg
patent: 4275530 (1981-06-01), Largeteau
Nakaoki Tokuzo
Sakata Hideo
Mitutoyo Mfg. Co. Ltd.
Olszewski Robert P.
LandOfFree
Radially adjustable internal grinder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radially adjustable internal grinder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radially adjustable internal grinder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1085021