DETERMINATION OF CHIP LENGTH COMPRESSION RATIO AT ONE-EDGE DRILLS

Increasing the volume of chips, taken per unit of time under conditions of high speeds and temperatures of the cutting, makes the problem of reliably shredding the chips and their effective removal from the cutting zone, particularly topical. The present scientific development examines the determination of the chip length compression ratio according to the proposed methodology. Presented are the results of the theoretical and experimental studies made according to the methodology

DETERMINATION OF PLASTIC DEFORMATION COEFFICIENT FOR ONE-EDGE DRILLS

The plastic deformation coefficient, also called the relative plastic deformation, is related to the angle of shifting of the chip and the rake angle of the tool. Studying the nature of chip shifting and deforming layer material relative to the face and major flank of the tool is of great importance for determining both the workability of the materials and the correct choice of cutting tool characteristics. This article proposes a methodology based on mathematical dependencies for determining the coefficient of plastic deformation. Theoretical results are presented based on the proposed methodology, as well as results of experimental studies

MILLING OF COMPLEX SURFACES

In the article are considered principle kinematic schemes of cutting for perform the machining of recessed and convex rotating surfaces. The mathematical dependencies determining the trajectory character described by the relative motion of the respective kinematic cutting scheme are presented. Of particular importance in performing of various principle kinematic schemes of cutting is the direction of motion of the tool relative to its rotation

KINEMATIC SCHEMES OF CUTTING IN MILLING

The presented article analyzes the used kinematic schemes of cutting in milling. With their change and the change in the kinematic ratio of the velocities of the elementary movements, the type of the work surface can be changed. The mathematical dependences presented in the article, describing the trajectory of the relative work motion of a cutting edge point, are used to conduct theoretical studies of the geometric parameters of the milling cutter performed by simulation modeling in the environment of the software SolidWorks