SU531663A1 - Internal surface treatment device - Google Patents

Description

one

The invention relates to the field of metal cutting, for example, the grooves of the outer rings of ball bearings on automatic lathes, and can be widely used in the engineering industry.

Devices for turning multi-spindle automatic machines and other machines for machining internal surfaces are known, comprising a housing with a wedge and mixed, and sliders equipped with cutting plates.

The disadvantage of such devices is that the machining accuracy is not high enough, since the axial movement of the wedge in hard guides does not take into account the accuracy of machining of the part relative to the axis of the cutting tool, which significantly affects the machining accuracy.

The closest in technical essence and the achieved result to the proposed invention is a device containing clnn and sliders and ensuring reception of the fixing device, in which a wedge with one of the sliders can move relative to the other fixed wedge.

The disadvantage of this device is the lack of preliminary centering of the wedge along the axis of the hole, which is necessary when inserting a tool into the part.

The purpose of the invention is to increase the machining accuracy by ensuring the immobility of the wedge in the radial direction when inserting and withdrawing the cutting part of the device from the workpiece and ensuring the wedge self-adjusting.

For this, the proposed device is provided with elastic rods for installing a wedge on them, one of which is fixed in the lid and the other in the stem.

FIG. 1 shows the proposed device, the cut; in fig. 2 is a section along A-A in FIG. one.

The device comprises a housing 1, in which slides 2 with cutting plates 3 are installed. Slides 2 with their grooves are connected with a wedge 4 installed in flexible rods 5 and 6, the front rod 5 being fixed in the cover 7, and the rear 6 in the rod 8 devices.

The device works as follows.

When inserting into the part of the cutting plates of the device, the flexible rods 5 and 6 hold the wedge 4 strictly along the axis of the device, thereby providing a uniformly distributed gap between the cutting plates and the part. On a working stroke, the rod 8 with the wedge 4 is moved to the left. Sliders 2, interacting with the wedge, move radially, effected. After a given size has been obtained, the sliders under the action of the wedge return to their original position, and the device is led out of the cutting zone. If one of the cutting plates breaks, the wedge moves towards this plate by the stroke amount (depth of profile plus clearance for insertion and plunging) and within keeping the axes of the rods 5 and 6, which prevents the device parts from breaking.

After the end of the working stroke, the wedge 4 under the action of the rods 5 and 6 again occupies an axial position, and the cutting part of the device freely emerges from the orifice of the workpiece.

Claims (1)

Formula Invention A device for treating inner surfaces, for example, grooves of the outer rings of bearings, comprising a housing, a self-adjusting wedge, a stem, a cover and sliders moving radially in the housing with cutting plates, characterized in that inputting the output of the cutting part of the device from the workpiece and ensuring the self-installation of the wedge during processing, the device is equipped with elastic rods for setting wedges on them, one of which is fixed in the lid, and the other in the rod.