Page 12 - Апрель

METALWORKING EQUIPMENT AND TOOLS

THE INFLUENCE OF THE DYNAMIC CHARACTERISTICS OF
THE MACHINE ON THE QUALITY OF THE SURFACE WHEN

GRINDING

The article describes the results of experimental studies on the influence of the dynamic
characteristics of the elastic system of the machine tool on the quality of the machined surface
during spline grinding. It is shown that the maximum values of the amplitudes in the spectrum
of forced vibrations of the tool and the work
piece are an order of magnitude smaller The quality of the surface processed on
than the values of the shape errors in the machine tools, characterized by roughness,
longitudinal section. The best surface quality waviness and geometric deviations, is largely
is obtained with double-sided counter-spline determined by the dynamic characteristics of
grinding (Rz <0.27 µm). the elastic system (ES) of the machine tool,
equipment and tool [1 - 5]. The dynamic
characteristics of the ES acquire a special
role, for example, when spline grinding, and
especially when grinding long shafts with less
vibration resistance [6]. To ensure quality, it is necessary to reduce the processing modes,
which reduces productivity.
Experimental studies of the dynamic characteristics of the machine tool, the spline
grinding process and their influence on the quality of the ground surfaces were carried out on
the machine mode. 3B451 (Fig. 1) using vibro diagnostic equipment and software available at
MSTU STANKIN [7 - 9]. The purpose of the research is to identify the most effective processing
method in terms of ensuring surface quality and minimum shape errors in the longitudinal
section. Methods of one-sided and two-sided spline grinding were compared with the passing
and opposite directions of rotation of the upper and lower wheels during pendulum multi-pass
grinding with division in one or double table stroke.

12 Stanochniy park