硬質(zhì)合金內(nèi)螺旋冷卻孔棒材的模具設(shè)計(jì)和試驗(yàn)研究.pdf

1、重慶大學(xué)碩士學(xué)位論文硬質(zhì)合金內(nèi)螺旋冷卻孔棒材的模具設(shè)計(jì)和試驗(yàn)研究姓名：孫毅申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：高家誠2001.4.2重壅盔堂堡蘭三蘭篁笙壅壘堡!!墾壘竺：!ABSTRACTRecentlymoreandmoreenddrillingtoolswillbeusedwithparallelortwistedinternalcoolingchannelswithwidervariationofthecooling10cat

2、ionandverydifferentpitches，becausesuchchannelmultiplythelifetime，maketheremovalofchipsmucheasierandimprovethequalityofcuttingworkincomparisonwithnormalsolidtoolswithoutinternalcoolingchannelsTheoldtwistingprocessesarerep

3、lacedbynewerprocesseswhicharecheaperandmoreexactThepresentfornewtwistingprocesseswhicharepatented，orforwhichpatentapplicationshavebeensubmittedschematicallyandtheoutlookforfurtherrationdevelopmentoftheextrusionprocessfor

4、aroddiameterofuDto50mmisgivenFirstofall，thedevelopingprogressofmetalpowderinjectionmoldingisintroducedBasedonitsomeprocessesofmanufacturinghelicaltwistedholesarecompared，consistedoftheirAdvantagesanddisadvantagesThenonep

5、rocessofmoldinghelicaltwistedcoolantholesiSdesignedThediesetdesignandmannfactureofpowderedmetalcompactingiSdiscussedThedevelopingofresearhaboutpowderedmetalcompactingprinciplesanditskeytechnologyisanalyzedanddiscussedthe

6、propertiesofpowderedmetalcompactingsuchasnonlinearbehaviorofmaterial，geometrical，andboundarycondition，thedifferencebetweenmetalpowderandporefreematerialandthedifficuriesofsimulationareexaminedThecomputersimalationstechno