SU454985A2 - Device for grinding center holes - Google Patents

Description

one

The invention relates to the production of parts provided with center holes.

By bus. St. No. 385714, a device for grinding center holes is known, equipped with a vras mounted on a spindle, an oscillating mechanism, a two-arm lever transmitting an oscillation movement to the spindle, interacting with them by a ring fixed on the carriage and rollers mounted on a two-lever lever altering the eccentricity of the planetary motion.

The proposed device differs from the known one in that the device carriage is equipped with an automatic balancing mechanism, made in the form of an axle mounted on the axis with a counterweight and a cracker mounted on the spindle and the entrance w, into the groove of the scenes.

This eliminates the imbalance of the rotating masses.

, FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - automatic balancing mechanism.

The device includes a grinding head body 1 with a flange 2 fixed on it, in which a radial 3 and thrust 4 bearings have a planetary axis 5 with body 6. the rollers 9, which are located in the housing 10 mounted on the fingers in the two shoulders lever I. The lever 11 is connected by means of an axis to a tension 12 connected with the oscillation mechanism located in the frame of the device.

The spindle headstock has an engine that is connected to the pulley 14 of the grinding spindle 15 by means of a flat belt 13, and

using a V-belt 16 - with pulley 1 / planetary spindle 5.

Grinding headstock has an automatic balancing mechanism, the axis 18 of which is fixed on the carriage 7. The axis 18 is equipped with a link 19, the groove of which includes a rinse 20 fixed on the axis 21 of the bracket 22 fixed on the housing 6. The link 19 has a counterweight 23. The device operates as follows in a way.

When the product is machined, the grinding spindle 15 is turned on by the belt 13, and the planetary spindle 5 by the belt 16. In addition, the oscillation mechanism through the pull 12, double-arm lever 11, rollers 9 communicate the carriage 7 with reciprocating movement along the inclined guides of the housing 6.

Together with the carriage 7, the axis 18 is moved, which communicates the swinging movement of the piston 19. This leads to the fact that the counterweight

23 deviates (see Fig. 2), increasing the distance from its center of gravity to the axis of rotation, and the more the reciprocating movement of the carriage 7 (and, consequently, the movement of its center of gravity from the axis of rotation), the the larger value is deflected by the counterweight 23 (and consequently, the movement of its center of gravity from the axis of rotation), which creates an automatic balancing of the rotating masses located on the Planetary spindle 5.

Subject invention

A device for grinding center holes in the ed. St. 385714, characterized in that, in order to eliminate the imbalance of the rotating masses, the carriage is equipped with an automatic balancing mechanism, made in the form of an axis on the axis of the scenes with a counterweight and a rusk attached to the keypad and entering the groove of the scenes.

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fpu. 2