Page 22 - Iscar Article 2_2017
P. 22

Machinability rating depends heavily on the type        one-hit production methods. However, the
        of titanium and its treatment. The machinability        typically low cutting speeds used in the machining
        of the widely used annealed titanium TiAl6V4            of titanium severely limit machine tools’ efficiency
        is approximately 35-40% less than annealed              potential and results in the cutting tool becoming
        stainless steel AISI 304. However, if we take the       the weakest element of the whole technical
        machinability of the aforementioned titanium            production system. In short, the cutting tool
        grade as 100%, the so-called “triple 5”, titanium       determines the productivity boundaries
        5-5-5-3, a major manufacturing headache for             when machining titanium and, as such, has
        many machine shops, features machinability              become a major factor in the quest for a
        characteristics that are twice as difficult.            radical improvement of this situation.

                 Machine tool manufacturers


         continue to introduce innovations



          and developments that make the



        cutting of titanium more effective




        Machine tool manufacturers continue to                  Due to the low thermal conductivity of titanium,
        introduce innovations and developments that             the main problem in cutting this material is the
        make the cutting of titanium more effective.            generation of heat. Poor heat transfer leads
        Modern machine tools allow operators to apply           to considerable thermal loads being directly
        advanced machining strategies and to employ             transferred to the tools cutting edge.





































                               22
   17   18   19   20   21   22   23   24   25   26   27