SU592583A1 - Cut-in circular grinder - Google Patents

Description

The invention relates to the field of machine tools, in particular to the design of circular grinding machines for plunge grinding of grooves of bearing rings.

A known machine for mortise grinding contains a grinding grandmother and a grandmother of the product with a wheel straightening mechanism with a roller in a position corresponding to the nominal size of the part 1. However, the straightening mechanism of the known flock does not have an independent mortise feed mechanism that would allow drying at any moment of the cycle.

It is also known a dressing device, made in the form of a diamond bearing head mounted on springs. The suspension of the right head is perpendicular to the feed direction and the head cooperates with the stop 2.

A correction device is known to compensate for the non-linear movement dependence with regard to the actual wear of the grinding wheel 3.

The disadvantage of the known machine 1 is not high enough performance and quality of processing.

The aim of the invention is to increase the productivity and quality of processing.

To achieve this goal, the machine is equipped with an intra-cycle straightener.

and the straightening mechanism is equipped with an independent drive of the mortise feed and connected to the setter, and an adjustable stop, w, nmc in contact with the roller holder in the position corresponding to the normal} part size.

The drawing shows the proposed machine.

On the base 1 mounted grinding

head (not shown) with grinding wheel 2 mounted on the spindle and iodach 3 mechanism with screw 4, as well as copier 5. On the bed guides 6 there is a block from the headstock of the product 7 carrying the workpiece 8 and the base 9 of the head

for straightening a circle moving relative to

headstock and screw connected to it 10

adjustment movements.

With base 9 by means of lamellar

Przzhin 11 and 12 is connected to the head holder 13 for straightening the circle, osaschaschennoy diamond roller 14. At the base 9 is mounted an adjustable stop 15, such as a screw, with a gear wheel 16 and the cylinder control 17

with a pin and rod 18, associated with an internal cycle adjuster (not shown). The headstock 7 is connected with a nut 19, which interacts with the lead screw and is equipped with a gear ring, in which the rail 20 is located, with which

Carry () C) face 21. And the last rolls on the copier.

The roller 14 is mounted in the holding head 13 with the possibility of contact with the circle 2 at a point symmetrical to the point of contact of the part 8 with the circle relative to the line passing through the center of the circle parallel to the direction of its feed. The adjustable stop 15 is in contact with the holder 13 of the roller 14 at a position corresponding to the nominal size of the part. The power circuit between the head 13 and the stop 15 is provided with a spring 22.

The machine works as follows.

When adjusting the screw 10, the base 9 of the head for straightening is moved in such a position that in the machining position the part 8 touches the circle 2 and the diamond roller 14 is separated from the circle by a gap. In the processing position, the stop 15 is retracted to the left, the spring 22 holds the head 13, movable on the plate springs 11 and 12, in contact with the stop, i.e. in the left position. During machining, the feed mechanism 3 by means of the screw 4 successively brings the part 8 to the circle 2, the rough and finishing feed, the holding time and the removal of the part, as well as the movement of the wheel wear compensation.

The preset moments of the machine cycle on command from the unit controller of the in-cycle straightening and the cylinder 17 is pressurized, and the rod-rod 18, turning the gear 16, displaces the stop 15; the head 13 and the roller 14 are shifted to the right by correcting the circle. Editing can be done after processing each part or group of parts, as well as in the middle of a cycle, for example, after rough grinding. As the wheel wears around, the feed mechanism 3 informs the workhead through the screw 4 of the compensation movement that is constant for each dressing cycle.

With the described machine layout, the thickness of the abrasive layer removed from the circle depends on

from the diameter of the circle. In order to ensure the continuity of the dressing conditions, the nut 19 is made rotatable and is connected by means of a rail 20 to a roller 21 running along the copier 5. This allows

make additional compensation movement as a function of moving the workhead block and the head for straightening.

Describes one of the possible modifications of the machine. Other modifications are possible, for example, the stop 15 can be placed to the left of the head 13, in this case the roller 14 will be fed to the straightening by a spring 22, etc.

Claims (3)

1. US patent number 3524283, class. 51.5 publ. 1970. 2. US patent number 2237976, cl. 125.11 publ. 1966. 3.Meryert M.P. “Precision thread grinding machines, M., 1962, p. 163. W