Abstract:
Determination of tool-quality is a very important factor
in metal cutting process. Because production rate, production
cost, surface finish etc. depend on it. At present in Bangladesh,
there is no testing facilities for cemented carbide tools which
are most widely used in production. In the present research
work, a new quality control method has been developed with which
quality of the cemented carbide tool bits can be determined
avoiding the lengthy method of tool wear test. Quality of high
speed steel tool can also be tested using this method but for
work-material apart from steel. A comparative analysis of
economic effectiveness of cemented carbide and high speed steel
tools have been made and it has been established that the cost
of turning a lead screw of a lathe machine with the high speed
steel tool is, on the average, two and a half times greater
than that of carbide tipped tools at the cutting speed of 80 m/min.
It has been further established by experiments that at higher
cutting speeds like 100,120,150 mm/min., it is not possible to
'use a high speed steel tool at all for the same purpose.
