approximately 20%, the high-speed machine tool utilization ratio 3 ~ 5%. Also, mould
enterprise has the unit suitable to buy a high-speed machine tool , complies with 6000
~ 40000 rmp's to have.
1 high-speed machine tool technology parameter demands
Process centre chief axis high-power , high rotation rate , satisfied rude finish
machining; The finish machining mould wants to need to reach 15000 ~ 20000 rmp
like the cutter , the machine tool with minor diameter. Generally, the chief axis
rotation rate machine tool under 10000 rpm can carry out rough process and half
finish machining , cannot reach the finish machining accuracy;
Have no way to reach 400 the above m/min cutting speed.
2 five scrolls of machine tools application increases a trend
1) treating route is nimble , the surface form is complicated;
2) treating range is big , the various type mould suitable processes;
3) cuts life-span of condition easy to cut down cutter wear , to raise a cutter,; 3
the softwares buying CAD/CAM and high-speed machine tools assort
On the grounds of the machine tool , major part counting , having several billions
U. S. dollar to be used to enter port every year, the electromachining machine tool and
the high-speed machine tool need to import.
Three, quick-cutting mould cutter technology
Quick-cutting processes the cutter needing allocating proper quick-cutting.
Progressing processing cutter material's in high speed has urged development of high
speed treating. The cutter , knife edge headquarter and high tenacity base gathering
crystal strengthening the ceramics cutter being able to be used giving consideration to
high hardness experience and observe carbide alloy coating becoming possibility.
Gather the crystal cube nitriding boron (PCBN) bit, whose hardness may amount to
3500 ~ 4500 HV. Gather crystal miamond (PCD) it's hardness but amount to 6000 ~
10000 HV. Germany SCS , Japan Mitsubishi (magical steel) and Sumitomo ,
Switzerland Shanteweike , USA Kenna are in recent years swiftly large wait for
the famous abroad cutter company to successively have debuted the respective quick-
cutting cutter, not only cutter having average structural steel of quick-cutting, the
ceramics cutter still having direct quick-cutting of energy quenching hard steel is
waiting for an effect to surpass the hard cutter, especially the coating cutter appears all
of a sudden , bringing into play in quenching half finish machining and finish
machining of hard steel. New cutter material and cutter technology appearing already
make the bottleneck problem that high speed has processed no longer be able to
appear on the cutter.
But, expensive entrance cutter price also blocks quick-cutting mould key factor.
Above to come to saying the cutter and the cutter holder acceleration reach 3 gs
the sort, the cutter circular runout needs to be smaller than 0.015 mm, but the knife
length is unable greater than 4 times cutters diameter. The reality according to
SANDVIK company has counted , the carbide alloy has stood on in the entirety using
carbon nitriding titanium (TICN) coating when milling cutters (58 HRC) carry out
high speed bright metal chopping , rough process cutter linear speed has been 100
m/min about , whose linear speed has exceeded but 280 m/min when finish machining