SU721253A1 - Material cutting apparatus - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to equipment for reiki material and can be used for cutting sheet guillotine shears.

Guillotine knives for cutting sheet metal are known, comprising a housing with a carbide insert embedded in it and guiding strips 1.

The disadvantages of these knives should be attributed to the fact that they do not provide a constant and uniform gap in the cutting process, and therefore the resistance of these knives is insufficient.

Closest to the proposed technical entity is a device for cutting material, containing knives, guide rails fastened to them, a separator with rolling bodies placed between the guide rails, and a lateral displacement limiter of the separator 2.

However, the knives of this device do not have sufficiently high durability due to the rapid breakdown of contact between the rolling bodies of the separator and the guide bars. The rolling bodies of the separator, making reciprocating movement along the same track along the guide bars, form a groove in them, while the tension between the guide bars and the separator disappears and the accuracy of the blade direction is lost.

The purpose of the invention is to increase the durability of knives.

This is achieved by the fact that, in the proposed design, the lateral displacement limiter of the separator is implemented in the form of bearings and

0 axles fixed in one of the guide rails and bearing bearings.

The width of the subdivision is equal to 0.6-0.9 of the diameter of the rolling elements. The gap between the podshpniki and the lateral surface of the separator is

5 2-10 spring 1 between the knives.

FIG. 1 shows the proposed device, front view; in fig. 2 - the same, view along arrow A; in fig. 3 - view along arrow B (turned); in fig. 4 shows a guide rail with bearings fixed thereto (section B-B in FIG. 2).

The cutting device consists of the upper 1 and lower 2 knives with solid carbide plates 3, guide bars 4 fastened to the blades, separator 5 with rolling elements 6 placed between the new bars 4, and separator 7 side offset. The separator lateral displacement 7 is made in the form of ball bearings 8 installed on the sides of separator 5 so that at any lateral displacement of the separator it can be directed by one of the ball cushions and axes 9 fixed in one of the direction bars 3 and not the ball pods 8. The optimum number of balls on each side is at least three. There is a gap between the side surfaces of the esserator and the ball underlay, the value of which is determined from the relation Z (2-10) Z, where Z is the size of the gap between the blades. Such a gap is taken from the practice of the knives and free rolling of the ball of the separator, not only from the bottom up, but also to ensure the degree of freedom of the ball and in the lateral direction. Such an oscillating movement of the ball in the lateral direction will prevent the contact of the surface of the guide rails from rapid wear and ensure a smooth movement of the separator.

The size of the gap between the bearing and the side surface of the separator is taken to be from 2 to 10 gaps between the blades along the

the reason is that, with a gap Zj, the pace of 2Z, the oscillating motion of the bodies of the bag in the lateral direction will be so small that the ball will roll along one track and wear the surface of the guide bars; when the gap Zj is large, 10Z, a large angle of inclination of the separator during the movement is possible, which is also undesirable, since in this case the guide bars need to be made unreasonably wide.

In order to ensure free rotation of the rolling bodies of the separator, the width of the bearing rings is chosen to be 0.6-0.9 d, where d is the diameter of the rolling bodies. This aspect ratio ensures the operability of the device; if the width of the bearing ring is less than 0.6 d of the diameter of the rolling elements, then the separator may leave the zone of contact with the ball bearings;

if the width of the rings is greater than 0.9 of the diameter of the rolling bodies, then the system will become jammed.

During the operation of the proposed device for cutting, the rigid directional movement of the separator in the guide bars is replaced with free movement with protection of the separator from falling out of the guide bars.

Such a movement of the separator will provide an increase in the service life of the guides, and the design of the device will allow maintaining a constant and uniform gap until they are completely worn out and will ensure maximum durability of the blades. The durability of the knives will approximately double.

Claims (3)

1. A device for cutting material, containing knives, guide rails, fastened with them, a separator with rolling elements, placed between the guide rails, and a separator lateral displacement limiter, characterized in that, in order to increase the stability of the blades, the separator lateral displacement limiter is made in the form of bearings and axes fixed in one guide bar and bearing bearings. 2. The device according to Claim 1, of which the width of the bearing is 0.60, 9 of the diameter of the rolling elements. 3. The device according to claim 1, about tl and h and wsh her so that the gap between the bearings and the side surfaces of the separator are 2-10 times the gap between the blades. Sources of information, stitched in heed} during examination 1. USSR author's certificate number 315517 cells. In 23 D 35/00, 1969. 2. USSR author's certificate number 377215 Cl. 23/35/00, 1971. (.Z P "/ g.5 one.