Research Information System
European Journal of Scence and Technology, no.21, pp.410-415, 2021 (Peer-Reviewed Journal)
31CrMoV9 and 34CrAlMo5 are
high-performance steels used in many industrial applications in which machines
and components are exposed to high surface stresses and dynamic loads. Depending
on the customer needs, these steels are first machined on CNC machines and then
their surfaces are hardened by nitriding. After nitriding, grinding is needed
to reduce the surface roughness values of the product according to the customer
demand or the need of the production. Grinding is a chip removal process that
uses an a grinding wheel as the cutting tool. However, one of the major
drawback for grinding process is significant amount of processing costs. For
some applications, such as pump drive shaft, it is foreseen that elimination of
grinding step in workflow may reduce significantly cost item for the
manufacturer. In this study, the machining parameters of hydraulic pump drive
shafts produced from 31CrMoV9 and 34CrAlMo5 materials were changed before
nitriding process and after nitriding no grinding process was applied and
surface roughness after heat treatment was measured. In the final machining
process, 54 hydraulic pump drive shaft samples made of both 31CrMoV9 and
34CrAlMo5 steel material were processed and the cutting edge moving value was
used as a variable parameter. According to the measurement results, it was
observed that the surface roughness of the pump shafts made of both steel
materials was negatively affected after the heat treatment, but this change was
limited by changing the turning conditions. Finally, by removing the grinding
process from the production process, it is aimed to shorten the total
production time of the products and reduce the production cost.