Modeling and study of the stress-strain state of the modular turning tools using numerical finite element method

Abstract

The paper studies a comparative evaluation method for the modular cutting tools stress-strain state under the cutting forces loading with the help of the finite element numerical method. The method allows forecasting the modular cutting tool the position of the tip of the cutting edge with identification of the confidence bounds for its exploitation in compliance with its intended use and reference operating conditions. The conducted modeling describes the modular cutting tool structure as a ranked set of structural components, such as the frame, cutting insert, shim, etc., oriented towards a certain direction with some surfaces being contiguous and thus making contact interactions. The research examined different tool structural component layout options, including those equipped/not equipped with a shim, having a radial/tangential location type of cutting components. Regression models were obtained for calculating the total displacements of tips the cutting edges of the cutting inserts, as well as maximum equivalent stresses in the cutting inserts, depending on the attachment and cutting forces for various clamping patterns and positioning cutting plates in the form of linear polynomials. The authors developed recommendations for the most efficient application of the modular cutting tool structural component layout options under specific production conditions.

Automation of assessment of the strain state of metal cutting machine mechanism elements on the basis of response function application

“…Starting the postulation of the mathematical model y = ϕ (x1, x2,…, xk ), it is necessary to take incto account the nature of the a-priori information on the researched process which can be characterized by three conditions [4][5][6][30][31][32][33]: the approximating function formula is known, it is required to specify unknown parameters; it is known the response surface coincides with one of the set functions. it is necessary to define this function and specify its parameters; the desired function type is unknown.…”