Txoj kev tsim ntau tshaj plaws rau txhuas piston blanks yog cov hlau pwm lub ntiajteb txawj nqus casting txoj kev. Tshwj xeeb, cov pwm hlau tam sim no tau pib ua tiav los ntawm CNC tshuab cov cuab yeej, uas tuaj yeem ua kom muaj qhov tseeb ntawm qhov loj me, kev tsim khoom siab thiab tus nqi qis. Rau qhov nyuaj piston kab noj hniav, cov tub ntxhais hlau tuaj yeem muab faib ua peb, tsib lossis xya daim rau pwm, uas yog qhov nyuaj dua thiab tsis ruaj khov. Txoj kev nqus casting no qee zaum ua rau muaj qhov tsis xws li kub tawg, qhov pores, pinholes, thiab xoob ntawm lub piston dawb paug.

Nyob rau hauv lub zog muaj zog cav, forged aluminium alloy pistons yuav siv tau, uas muaj refined nplej, zoo hlau streamline tis, siab zog, zoo hlau qauv thiab zoo thermal conductivity. Yog li qhov kub ntawm lub piston yog qis dua li ntawm lub ntiajteb txawj nqus casting. Lub piston muaj siab elongation thiab zoo toughness, uas yog zoo rau alleviate kev nyuaj siab concentration. Txawm li cas los xij, hypereutectic aluminium-silicon alloys uas muaj ntau dua 18% silicon tsis haum rau forging vim lawv cov brittleness, thiab forging nyhav ua rau muaj kev ntxhov siab loj hauv lub piston. Yog li ntawd, cov txheej txheem forging, tshwj xeeb tshaj yog qhov kawg forging kub thiab kub kho kub yuav tsum tsim nyog, thiab feem ntau ntawm cov kab nrib pleb nyob rau hauv forged piston thaum siv yog tshwm sim los ntawm residual stress. Forging muaj cov kev cai nruj ntawm cov qauv piston thiab tus nqi siab.

Cov txheej txheem ua kua tuag forging pib siv nyob rau hauv ntau lawm nyob ib ncig ntawm lub ntiaj teb no ua tsov ua rog II, thiab tau raug txhawb nqa thiab siv rau ntau yam nyob rau hauv ntau lub teb chaws thoob ntiaj teb. Nws tau ua tiav txoj kev loj hlob sai hauv kaum xyoo dhau los. kuv lub tebchaws tau pib siv cov txheej txheem no xyoo 1958 thiab muaj keeb kwm txog 40 xyoo.

Cov kua tuag forging yog nchuav qee cov kua hlau rau hauv cov pwm hlau, nias nrog lub punch, kom cov kua hlau ua rau cov kab noj hniav ntawm qhov qis qis dua hauv kev tuag casting, thiab crystallizes thiab solidifies nyob rau hauv siab kom tau ib tug ntom. qauv. Cov khoom tsis muaj shrinkage kab noj hniav, shrinkage porosity thiab lwm yam tsis xws luag casting. Cov txheej txheem no muaj ob qho tib si cov yam ntxwv ntawm casting thiab forging.