SU1252078A1 - Method of pattern-cutting of web material - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in cutting strip material.

The purpose of the invention is to reduce metal waste to waste due to the separation of the unmeasured residue from the rear terminal defect.

FIG. 1 shows a scheme for carrying out the method for cutting a strip material in the position of cutting the front defective end of the strip; figure 2 is the same, in the position of the segments of unmeasured residue from the rear end of the defect.

When implementing the method, the strip 1 (Fig. 1) before feeding it into the cutting zone is based so that the distance from the front end of the strip to the cutting plane is less than the length of the measured workpiece by the amount of the front defective end of l, seized by reciprocating movements on the feed step size and in the rearmost position by the feed mechanism 2 with the pusher 3 mounted on it and fed to the cutting zone by the feed step t. As a result, the front defective end A is separated. Upon further movement of the strip, a dimensional blank is cut.

The reciprocating movement of the feed mechanism occurs by an amount at which the extreme front position of the base surface of its pushing element 4 is from the cutting plane at a distance that is longer than the length of the measured workpiece by the amount of the rear end defect L. At the same time, the distance between the base surfaces pusher element 4 and pusher is equal to the feed pitch t.

Cutting off the last dimensional workpiece and separating the non-dimensional residue from

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five

five

five

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rear end defect and, carried out as follows (FIG. 2).

After the next feeding of the strip into the cutting zone (position 1), the feed mechanism 2 opens, releases the strip and returns to the extreme rear position (position 2). Then it shrinks again, and since the strip is missing, its gripping organs are fully closed, in the form of pushings element 4, which, when the feed mechanism moves forward (from position 2 to position 3), acts on the back end of the strip and pushes the rest of the strip into the cutting zone that its rear end is from the cutting plane at a distance equal to the sum of the lengths of the workpiece and the rear end defect l, and part 5 extends beyond the cutting plane, which is a non-dimensional residue that is cut off.

The feed mechanism moves to the rear position. At the same time, the push-button 3 falls from the strip (position 4) and its base element is installed against its rear end. When moving forward in the feed step (from position A to position 5), the reamer feeds the remainder of the strip so that a part of the strip is propelled beyond the cut plane, the length of which is equal to the measured workpiece, and the rear end defect remains in front of the cut plane. In this position, they are separated.

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The feed mechanism is unclamped and

returns to the back position (position 6), another strip is fed into it and the cycle is repeated.

In comparison with the known use of the proposed invention allows to reduce the loss of metal in the waste due to the separation of unmeasured residue from the rear end defect.

Editor N. Gunko

Compiled by V. Shebalkin

Tehred n, Bo1tllo Corrector T. Kolb

Order 4568 / Circulation 1001 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

METHOD FOR OPTIMIZING STRIP MATERIAL with preliminary separation of the front end defect, including alternating the step feed of strip material and lengths of the measured blanks, as well as separating the non-dimensional residue with a length less than the feed step and the rear end defect, characterized in that, in order to reduce metal loss to waste due to separating the non-dimensional residue from the rear end defect, before the length of the last measured workpiece, the rear end of the strip is set from the cutting plane at a distance equal to the sum of the lengths of the measured cooking, an unmeasured residue and a rear end defect, after which the strip is moved to the cutting zone to the position of the rear end of the strip to the cutting plane at a distance equal to the sum of the lengths of the measured workpiece and the rear end defect, the non-dimensional residue is cut, the rest of the strip is fed to the feed step g and separate the measured workpiece from the rear end defect. SU, „, 1252078