Abstract

In practice, movable blocks with oppositely arranged cutting inserts are used for turning internal and external cylindrical surfaces with great length. With these instruments, the dimension of dynamic adjustment is formed as a result of the continuous striving to the dynamic equilibrium of the radial components of both operation cutting forces which is restricted in the systems of the tool and the work piece. In this processing scheme, it is particularly important that the opposite cutting edges lie in a plane perpendicular to the axis of the work piece, which is difficult for implementation in certain circumstances. In addition, under certain circumstances, the variation of the machining allowance has an impact on the size of the dynamic adjustment. It leads to reduction of the diameter of the treated surface towards the dimension of the static adjustment of the block. This article proposes an innovative solution for using tools with opposite cutting inserts, which are axially displaced with guaranteed value to increase the accuracy of the obtained size. The question of adjusting the elasticity of the cutting block to compensate for the effect of the variable allowance on the accuracy of the treatment is investigated. As the result of researching, the dependencies to quantify from this impact and the conditions for its reduction are received, which can be used in practical conditions for increasing accuracy of the static adjustment.

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