模具制造加工英文文献和中文翻译(3)
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 and microstoning. Such demands to cutter material (include the hardness, tenacity, red hardness keep the form (include row of crumbs function , surface accuracy , dynamic balance sex etc. (cutting the function) , the cutter under high temperature state)) as well as cutter life-span all has very highly.
Experience according to in the homeland mould high speed finish machining, linear speed has exceeded 400 ~ 800 m/min when adopt the young diameter ball head milling cutter to carry out mould finish machining. The machine tool choosing sufficient high-speed's cuts mould finish machining stiffly.
Delcam adopt 0.8 mm diameter cutter to process the narrow slot , rotation rate 40000 rpm , 0.1 mm depth, feed speed 30 m/min.
1 chooses the cutter parameter, the cutter waits if shouldering an anterior angle. The cutter requires that the ability processing request shock resistance tenacity more highly, requiring that heat resistance pounds than average is strong;
2 adopts various method improving cutter life-span, reduces cutter cost.
3 adopt the high speed hilt, HSK hilt, heat pressing applying the most being at present to pretend to grip a cutter. Pay attention to a cutter pretend to grip overall in the day afer tomorrow dynamic balance;
4current cutter enterprise has already done many jobs in the field of the technology resolving the quick-cutting cutter, serving facing the cutter processing may help to solve much problem, the cutter has produced a manufacturer becoming the main body, the reference cutter has produced the technology parameter that the manufacturer provides.
Four, improve quick-cutting mould efficiency technology
1 cutter diameter and the length choice
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