THE DEVELOPMENT OF DYNAMIC MODEL OF THE COLUMN OF HORIZONTAL MULTI-AXIS BORING MACHINE WITH HYDRAULIC JACKS COMPLEX AS THE CONTROL TARGET

Metal cutting equipment is one of the basics of machine building production. Horizontal multi-axis boring machines used in machine building allow processing workpieces of various sizes and complexity with high accuracy and high efficiency. In this case, the accuracy of treatment depends on many factors but the basis is the geometrical accuracy of processing equipment itself. Machine accuracy affects its working ability, durability, efficiency, productivity, noise and vibration level and the quality of the goods produced. Strength bending and torsional deformations of stands of horizontal multi-axis boring machines occurring when moving the machine column along the stand cause the decentration of the processed bores, for example, during the boring. The author suggests installing of two executive elements of vertical displacements in conjunction between the slide assembly and the column bed of the machine. Hydraulic jacks are the example of such executive elements. Machine column with the hydraulic jacks’ complex serves as the control target. When changing the working liquid pressure in them, the motion of column leading end occurs. The paper presents the design of the dynamic model of the column with hydraulic jacks’ complex of the horizontal multi-axis boring machine, the stand of which is subject to the strength bending and torsional deformations. 2A459AF4 model machine became the study object. The author considered the reactions in the points of hydraulic jacks’ installment and determined the analytical expressions on which basis the block schemes of control target with the hydraulic jacks’ complex in relation to perturbation action and control channels were built. The object transfer function against the perturbation and control actions that allows producing the system of the static setting of processing system of multi-axis boring machines was determined.