METHOD OF PRELIMINARY FORM head and tail part of a continuous slab-CAST TO REDUCE THE VOLUME OF CUTTING head and tail of the intermediate slab DH

摘要

1. A method for pre-controlling the shape of head and tail parts of the continuously-cast slab to reduce the volume of the head and tail trimming parts of intermediate hot slab, a preliminary control comprising cutting the head and tail parts of a continuously cast slab, namely, the implementation of the slab trimming to obtain a desired shape, whereby the end surface of the head portion is concave inward, and the end surface of the tail section is bent naruzhu.2. The method of claim. 1, characterized in that the shape of the head portion of the slab coincides with the shape of the tail portion of the first slab, and the shape of the tail section of the slab coincides with the shape of the head portion of the second slab, ie first and second slabs are cut from the same continuous-cast slyaba.3. A method according to Claim. 1 or 2, characterized in that the pre-control cutting head and tail parts of a continuously cast slab, namely, carry cutting head and tail of the slab in a curve symmetrical center line of the slab width, and the height of the arc H, that is the maximum value of the head portion or concavity of maximum convexity of the tail section is mm.4 0-50. The method of claim. 3, characterized in that the curve is a circular arc, ellipsoid arc, sine curve or a polynomial krivuyu.5. The method of claim. 3, characterized in that the curve is a circular arc and determined by the width of the slab W and H of the arc height, thus, assuming the coordinates of the arc top strand of (0, 0), and the distance between the unknown point and the center line the width of the x, the displacement at the desired point with respect to