SU1261753A1 - Method of separating rolled stock - Google Patents

Abstract

A METHOD FOR DIVIDING A ROLL into blanks, including a double-sided introduction of knives into rolling, in which one of the knives moves the rolling with acceleration towards the opposing knife, characterized in that, in order to increase the quality when producing unequal mass blanks, the rolling of the rolled metal is accelerated since the introduction of the knives to a depth corresponding to the beginning of the total yield strength of the rolling stock in the plane of separation. dl s .cf} u.f.f

Description

The invention relates to the blank production of metallurgical and machine-building plants and can be used in industry for the separation of both cold and hot rolled square, round and polyhedral profiles.

The purpose of the invention is to improve the quality of the separation of rolled metal when obtaining blanks of unequal mass.

FIG. Figure 1 shows schematically the proposed method for the separation of rolled metal directly at the moment of the accumulation of the state of total yield in the section being separated; in fig. 2 - the same, the moment of the message of rolling accelerated - one of the knives; in fig. 3 the shape of the cut blanks obtained by the proposed method.

The method is implemented as follows.

The bar of rolling 1 is placed between the wedge knives 2 and 3 and carried out their introduction to a depth h corresponding to the beginning of the total yield in the section to be sectioned (Fig. 1). Upon reaching the depth of introduction h, the influence of different masses of the divided parts of the rolled product on the nature of their interaction with the tool begins.

those. On the side of greater mass M, knives 2 and 3 are affected by a greater force P than force P on the side of a smaller mass t. The difference in force is realized by the movements of the rolled parts at once (proportional to the mass) by one of the knives, for example, with a knife. 3, the acceleration W in the direction of the second knife 2 (FIG. 2) is reported. The message of rolling acceleration W causes its bending in the plane of separation and some movement in the direction of the knife 2. This accordingly causes movement of the ends of the car 1 in the direction to the plane of separation. With such a movement of the ends, parts of the rolled stock 1 are resisted, respectively, and on knives 2 and 3 from the side opposite to the effect of the resultant force (R., - P „),

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a counterbalance force (t) appears, which ensures the symmetry of the stress-strain state. This ensures the exhaustion of plasticity in the stretchable bridge between blades 2 and 3 in the separation separation plane, which guarantees high quality of the billets obtained.

Claims (1)

METHOD FOR DIVISION OF RENTAL on billets, including bilateral introduction of knives into the rental, in which one of the knives is rolled with acceleration towards the opposing knife, characterized in that, in order to improve the quality when receiving blanks of unequal mass, the rolled is moved with acceleration from the moment of introduction knives to a depth corresponding to the beginning of the general fluidity of the rolled product in the separation plane. SU ,,, 1261753