手機外殼的模具設計-資料下載頁

　　

【正文】 speed machine tools assortOn 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 highspeed machine tool need to import.Three, quickcutting mould cutter technologyQuickcutting processes the cutter needing allocating proper quickcutting. Progressing processing cutter material39。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 being possibility. Gather the crystal cube nitriding boron (PCBN) bit, whose hardness may amount to 3500 ~ 4500 HV. Gather crystal miamond (PCD) it39。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 pany to successively have debuted the respective quickcutting cutter, not only cutter having average structural steel of quickcutting, the ceramics cutter still having direct quickcutting 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 quickcutting mould key factor.Above to e to saying the cutter and the cutter holder acceleration reach 3 gs the sort, the cutter circular runout needs to be smaller than mm, but the knife length is unable greater than 4 times cutters diameter. The reality according to SANDVIK pany 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 lifespan 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 highspeed39。s cuts mould finish machining stiffly.Delcam adopt mm diameter cutter to process the narrow slot , rotation rate 40000 rpm , 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 lifespan , 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 quickcutting cutter , serving facing the cutter processing may help to solve much problem , the cutter has produced a manufacturer being the main body , the reference cutter has produced the technology parameter that the manufacturer provides.Four, improve quickcutting mould efficiency technology1 cutter diameter and the length choice2 HSM and the EDM choice3 does cutting and the lubricating cooling4 feeds choice: Move forward generally giving amounts milling cutter diameters 10% , move forward giving a width milling cutter diameter 40%. According to material, condition chooses the parameter processing handicraft rationallyHigh speed bright metal cuts the mass processing part material abroad fairly good, material quality level is identical , the treating function parison is stable。 But, the cutter that the pany produces abroad is also that the standard makes an experiment with their material。 The treating being remended by is suitable to their standard paratively like the parameter , material quality has the certain difference with domestic part , this difference shows paratively obviously , some parameters can apply directly, but some effect dispatches right away paratively during the period of high speed bright metal chops if using their cutter. But select and use part material quality in the homeland like enterprise having the certain standard, what be put into use part material, can use the part material quality that high speed processes especially , the general meeting is limited in some part material range inner, that this applies the high speed processing technology to us has also provided advantageous condition , has been able to apply to less treating material within range. Being needing to emphasize that here, must choose the treating technological parameter optimizing out a set of capital suitable enterprise on these material , is brought into pany standard and.The technology selecting and using the domestic cutter , seldom having the bright metal remending high speed to chop parametric , is necessary making an experiment, get the paratively satisfied parameter , produce a manufacturer had better to select and use the fixed cutter , cut down the number of times testing that , the standard forming a processing technology, such can improve effective utilization ratio of equipment , lowers production