SU411965A1 - - Google Patents

Description

one

The invention relates to the field of machine tools.

The caliper used on the backing machines is known, which includes a mechanism for the cross feed of the cutter in the form of a screw and a split nut, the elements of which are located on the screw with a gap between them, and the mechanism for quickly removing the cutter from the treatment area.

The purpose of the invention is to increase the rigidity of the caliper and the accuracy of processing.

This is achieved by the fact that each of the two parts of the nut is provided with a pair of end cams set in the direction of the axis of the screw by working curves towards each other, one of which is fixed in each pair against rotation, and the second can rotate relative to the nut; Each pair of jaws, in addition to the screw surfaces, has additional areas that allow the system to be locked at the end of the tool inlet and outlet from one abutment end of the fixed caliper to its other end through a corresponding pair of jaws, part of the nut of this pair, screw and second part of the nut.

The retract-approach and jamming curves are located on the cams so that when the handle is turned in one direction, the approach is followed and jammed; when turned into the other, the outlet is followed

wedging all the elements of the mechanism from one stop end of the caliper to the other end of it, through the corresponding pair of cams, part of the nut of this pair, the screw and the second part of the nut. Moreover, the curve for jamming the supply is a schA self-braking, and the curve for jamming a withdrawal is a non-braking schA.

FIG. 1 shows a section of the caliper in the horizontal plane according to the mechanism for quickly removing the cutter from the thread; in fig. 2 - the scheme of work of cams of fast approach and removal (development).

In the proposed support, two parts of the nut 2 and 3 are mounted in the groove of the fixed element 1 with a gap between them, sliding in this groove. The parts of the nuts 2 and 3 are connected to the screw 4 mounted in the transverse slider 5, which holds the tool holder 6. Each part of the nuts 2 and 3 is equipped with a pair of end cams 7, 8 and 9, 10 installed in the direction of the axis of the thread, working surfaces towards each other. In each pair of cams, one of them is fixed 7, 9, and the other 8, 10 is loosely mounted on the splined shaft AND, and can be rotated with respect to the nuts 2, 3. The splined shaft 11 is connected to gear 12 through gear 13 on the screw with the handle 14, which brings and removes the cutter with fixation. Each of the cams is equipped with two sections of working curves arranged in series one after another. -One section of the working surface is designed respectively for a quick supply of ab and he with a lifting angle that provides the necessary caliper travel with a corresponding cam rotation; the other section is bc and e / - for locking the system at the end of the supply of the toolholder 6 with a lifting angle within the self-locking angle at cams 7, 8. And for cams 9, 10 within, greater than the self-locking angle by 1-6 °. The angle of rotation of the cams 8 and 10 is not more than one revolution.

The support works as follows.

FIG. 2 shows the position “approach. To quickly pull the cutter out of the thread, rotate the handle 14 with the bristles 13, through the bristle 12 and the spline shaft And turn the cams 8, 10.

The quick retraction cam 8 rotates with a working surface ab approaches the surface a b of the fixed cam 7. At the same time, the fast approach cam 10 rotates away from its surface e / from the surface ef of the fixed cam 9 and forms a gap. At the moment when the surface ab of the cam 8 touches the surface a b of the fixed cam 7, a constant gap is formed between the working surfaces of the cams 9 and 10.

When the working surface ab of the cam 8 slides on the surface a of the cam 7, the cam first abuts against the end A of the sliding element 1, and then through the cam 7, part of the nut 2 and screw 4 retracts the cross-slider with the cutter until nut 3 stops. in the end B of the fixed element 1. The retraction is completed. During the subsequent rotation of the cam 8 with the handle 14, the surface be, interacting with the surface bc, wedges the whole mechanism from the end A through the cam 7, part of the nut 2, intern 4 at the second end B.

The tool is returned to the failed state in reverse order.

The approach cam 10 rotates with the working surface he approaches the surface of the non-stationary cam 9, while the quick-release cam 8 rotates away with its working surfaces from the surfaces of the stationary cam 7, forming a gap.

When the handle is further rotated, the entire system together with the transverse crawler and cutter moves to the feed position and at the end of the feed is wedged by working surfaces e / and ef from the face B through the cam 9, part of the nut 3, screw 4 and part of the nut 2 to the end A .

Subject invention

Claims (2)

1. A backing machine caliper with a cutter feed mechanism consisting of a screw and a split nut, parts of which arranged with a gap, and a mechanism for quickly removing the tool from the machining zone, characterized in that, in order to increase the rigidity of the caliper and the machining accuracy, each of the two parts of the nut is equipped with a pair of end cams with working surfaces directed towards each other, one cam of which is fixed from the rotation, and the second is installed with the possibility of rotation relative to the nut. 2. The support according to claim 1, characterized in that the working surfaces of the cams, locking the system at the end of the cutter feed, are made with a lifting angle within the self-locking angle, and the working surfaces of the cams, locking the system at the end of the cutting edge, are made with a lifting angle greater than the angle of self-locking by 1-6 °.