SU804246A1 - Method of longitudinal cutting of flat materials - Google Patents

Description

(54) METHOD FOR LONGIT CUTTING OF FLAT MATERIAL

I

The invention relates to the processing of metals by pressure, in particular to equipment for cutting, and can be used for cutting flat material (sheets, tapes) into strips of different widths.

. A known method of cutting material in which the material is bent and then cut 1.

However, this way it is not possible to adjust the width of the cut strips:

There is also known a method of cutting flat material on disk shears, which includes the task of the material in disk shears and cutting it into several strips 2.

The disadvantage of this method is that it is designed for cutting flat material of a certain width. In the transition to cutting flat material of a different width, readjustment of knife mandrels is necessary.

The purpose of the invention is to adjust the width of the cut strips.

The goal is achieved by the fact that when filling a flat material into scissors, a compressive force is applied to it in the transverse direction, thereby bending it.

The drawing shows a diagram of cutting flat material in a disk shears with two pairs of knives.

Rollers 2 are mounted on both sides of the disc shears I, which have 5 streams 3 for guiding the edges of the flat material being cut 4. The rollers are mounted in front of the shears on both sides of the knives, the distance between the rollers and the disk blades being determined by the width of the flat material being cut width of cut strips.

When the tape enters the cutting zone, its edges enter the streams of idle rotating rollers. Since the distance between the rollers is less than the initial width of the material, the belt loses its lateral stability and bends. Moreover, the number of inflection points of the steel strip corresponds to the number of cutting pairs of knives. The direction of the bend in the areas between the cutting pairs is determined by the relative position of the blades and coincides with the direction of the cutting force relative to the points of inflection. In the process of cutting, the edges of the cut strips, due to elastic forces, abut against the blade of the knives and tighten even more into the streams and then spread outside the cutting zone under the action of the tension forces of the strip and due to the wiring installed in each working gap. Example. The tests are carried out on disc shears containing two working cutting pairs. In tests, steel strip with a width of 950-953 mm is used. The initial thickness of the tape is 3.4-3.8 mm. The distance between the tape compressors is 945 mm. In this way, a width of 5-8 mm is compensated for by compression. During testing, the cutting process proceeds steadily and the values of the belt deflections at each of the sections between the cutting pairs of knives and between the extreme knives and the rollers are the same. As a result of the tests, three bands of the same width of 316.7-317.7 mm each were obtained.

X /

Claims (2)

f 6 Thus, having compressed a flat material in the transverse direction, changing the amount of deflection, it is possible to cut a material of different widths. Claims The method of longitudinal cutting of a flat material, including the task of a flat material in knives and cutting into several strips, characterized in that, in order to adjust the width of the cut strips, the flat material is bent in the transverse direction in the task. Sources of information taken into account during the examination 1. USSR author's certificate No. 316508, cl. B 21 F 11/00, 1969. 2. USSR author's certificate number 406414, cl. On 23 D 19/00, 1970.