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Investigation of the influence of the degree of non-sinusoidal mold oscillation of the law on the formation of a hard crust of billets A decisive influence on the formation of crusts and the amount of friction in reciprocating motion of the mold have a frequency and amplitude of oscillation.?Mold oscillation amplitude influences the distance between the tracks, and the frequency - in their depth of penetration.?However, these two parameters are not sufficient to optimize the length of time independently of movement along the workpiece with the mold and return it upwards. Studies on the effect of the mold oscillation on the surface quality of continuously cast billets was conducted under the CCM PJSC Enakievo Steel.?The main purpose of the work is to evaluate the surface quality of continuously cast billets, spilled with sinusoidal and triangular modes of oscillation of the mold.?The experiments have been tried various settings of the mold oscillation in obtaining billets section 150x150 mm steel St5 (Table 5.2) and selected in the same mold (of 4) of the sites with the most characteristic pieces surface conditions. Table 5.2?- Parameters studied casting blanks Photos of the most characteristic signs of oscillation occurring on the surface of the workpiece, for the studied samples are shown in Figure 5.24. For quantitative estimates of the profile (relief) surface platen using a dial gauge IC-10 (class - 1, graduation - 0.01 mm).?For studies of surface roughness profile LED mounted in a magnetic rack, which was attached to a stationary milling machine.?Then, on the machine frame is rigidly fixed platen (Figure 5.25).?Measurements carried along through every inch platen surface by moving bed milling machine.?Starting point of the surface should be zero, subsequent the deviation above or below zero. Figure 5.24?- Photo two sides adjacent faces templet study: 1, 2, 3, 4 - room platen, A and B - side platen Visual inspection of the selected platen revealed that traces of