ROUGHNESS OF HIGH HARDNESS CERAMIC CORRELATION
OF DIAMOND GRINDING REGIMES WITH Al
V. V. Kuzin
and S. Yu. Fedorov
Translated from Novye Ogneupory, No. 7, pp. 65 – 70, July, 2016.
Original article submitted June 16, 2016.
Results are given for a study of the effect of surface grinding regimes with diamond wheels on Al
surface condition. A correlation is established between grinding depth, longitudinal and transverse feed with
roughness, waviness, and treated surface morphology.
Keywords: grinding, ceramic, treated surface, roughness, waviness, ceramic layer surface morphology.
Operating properties of machines are determined by con-
ditions of contact reaction of assemblies and components .
Tribological properties, wear resistance, and fatigue of com-
ponents, and also contact rigidity and sealing of joints in ma-
chine assemblies depend on the condition of a manufactured
component surface [2, 3]. Their geometric parameters,
roughness, waviness, and deviation from an ideal geometric
shape, formed during manufacture, determine the important
of the task of providing required component quality. Solution
of this task is of special important in the manufacture of
components made from various ceramic materials [4, 5].
This primarily connected with the limited nature of produc
tion methods suitable for machining high-hardness ceramic,
and also with the specific nature of removal of tolerances, in
which there is simultaneous participation of brittle and duc
tile failure mechanisms [6, 7].
In MGTU Stankin research has been conducted for re
vealing the correlation of grinding regimes with surface con
dition of specimens of various ceramic materials. Results of
these studies will be presented in a cycle of articles under the
heading “Roughness of high hardness ceramic”. The first
article is devoted to machining ceramic based on aluminum
oxide and used extensively for manufacturing components
extremely in demand in many fields of application.
The study of grinding Al
-ceramic with diamond
wheels has been the subject of numerous works in which in-
dividual aspects of multilevel problems are analyzed. The
mechanism of Al
-ceramic surface layer formation during
grinding due to crack formation generated at the inner sur-
face of grooves and propagating into the volume of a
workpiece, have been described in articles [8, 9]. Features
have been revealed in  of the relief of a machined
-ceramic surface with numerous grooves of different
depths, whose bottom and side surfaces are formed by a layer
of smooth material. At the tips of grooves there is formation
of laps depending on the depth of diamond grain penetration
into a ceramic specimen surface. At a small depth laps hav
ing a shape of micro-ridge quite uniformly alternate at a
ground surface. With a considerable depth of diamond grain
introduction within the surface of a ceramic specimen there
is formation of wavy laps, randomly positioned at a ceramic
surface. With an intense grinding regime there is an increase
in machined surface roughness . The effect of ceramic
surface relief on the stress-strained state of an Al
surface layer at high temperature has been described in arti
cles [12, 13]. It has been established  that in a machined
-ceramic surface there is formation of waves of two
types having a different nature of development. With intensi
fication of grinding the amplitude of these waves increases
and the greatest effect on waviness in a machined surface is
the wheel velocity and longitudinal feed during grinding.
Brief analysis of the scientific and technical publications
shows a lack of a common approach to development of tech
nology for diamond grinding. The aim of this work is to
Refractories and Industrial Ceramics Vol. 57, No. 4, November, 2016
1083-4877/16/05704-0388 © 2016 Springer Science+Business Media New York
FGBOU VO Moscow State Technological University Stankin,