1) Hauv kev siv ib txwm muaj, tus pas nrig piston tau raug hloov pauv, thiab muaj cov khoom siv sib khi reciprocatingly rub nws saum npoo ntawm 50mm × 770mm, yog li yuav tsum muaj qhov siab hardness ntawm qhov chaw no . piston pas nrig yog ua los ntawm 38CrMoALA cov khoom. 50mm × 770mm ib feem tau quenched thiab tempered thiab nto nitrided. Cov tub ntxhais hardness yog 28 ~ 32HRC, qhov saum npoo nitrided txheej qhov tob yog 0.2 ~ 0.3 hli, thiab qhov tawv tawv yog 62 ~ 65HRC. Nyob rau hauv txoj kev no, tus pas nrig piston muaj qee qhov kev toughness.
2) Cov qauv ntawm tus pas nrig piston yog qhov yooj yim, tab sis nws qhov ntev-rau-inch piv yog loj. Nws yog ib qho slender ncej nrog tsis zoo rigidity. Txhawm rau kom ntseeg tau qhov tseeb ntawm machining, qhov kev sib tsoo thiab kev ua tiav tiav yuav tsum tau muab cais tawm thaum lub sijhawm tig, thiab qhov kev sib tsoo thiab kev ua tiav yuav tsum tau siv tag nrho cov cuab yeej cuab tam, txhawm rau txo qhov deformation ntawm lub workpiece thaum lub sij hawm ua, qhov ruaj khov yuav tsum tau siv. thaum ua cov xov ntawm ob qho kawg.
3) Thaum xaiv qhov positioning datum, txhawm rau xyuas kom meej lub coaxiality kam rau ua ntawm qhov chaw thiab qhov kev sib nrig sib txoj hauj lwm raug ntawm txhua feem, tag nrho cov txheej txheem ua tau txais ob qhov chaw rau qhov chaw, uas ua raws li lub hauv paus ntsiab lus ntawm unified datum.
4) Thaum lub npoo sab nrauv yog nyob rau sab nrauv, lub workpiece yog qhov yooj yim rau yielding thiab elastic deformation, uas cuam tshuam rau qhov tseeb ntawm piston pas nrig. Yog li ntawd, qhov chaw nruab nrab yuav tsum tau kho thaum lub sij hawm ua, thiab qhov chaw nruab nrab yuav tsum tau muab ntxuav kom huv. Lub degree ntawm nruj ntawm qhov chaw nruab nrab yuav tsum tsim nyog, thiab lubrication zoo yuav tsum tau xyuas kom meej. Kev xaiv dav dav ntawm kev sib tsoo lub log: abrasive dawb corundum, particle loj 60, nruab nrab mos lossis nruab nrab hardness, ceramic daim ntawv cog lus, thiab qhov dav ntawm lub log sib tsoo yuav tsum nqaim kom txo qis radial sib tsoo quab yuam. Ua tib zoo saib rau kev xaiv cov nyiaj sib tsoo thaum ua, tshwj xeeb tshaj yog qhov sib tsoo qhov tob Ua kom me me.
5) Thaum sib tsoo 50mm × 770mm txheej lub voj voog thiab 1:20 taper, ob txheej txheem yuav tsum tau nqa tawm nyias. Thaum sib tsoo 1:20 taper, daim ntawv xeem yuav tsum yog hauv av ua ntej, thiab cov khoom ua haujlwm tuaj yeem ua hauv av tsuas yog tom qab daim ntawv xeem tau tsim nyog. Kev tshuaj xyuas ntawm 1:20 conical nto yog siv tus qauv 1:20 lub nplhaib ntsuas rau kev tshuaj xyuas xim, thiab qhov chaw tiv tauj yuav tsum tsis pub tsawg dua 80 feem pua.
6) Txhawm rau kom ntseeg tau tias kev ruaj ntseg ntawm kev ua haujlwm raug ntawm lub piston pas nrig, kev tuav phau ntawv tsis raug tso cai thaum lub sij hawm tag nrho cov txheej txheem ntawm machining.
7) Thaum lub sij hawm kho nitriding, threaded qhov chaw, thiab lwm yam yuav tsum tau tiv thaiv los ntawm cov khoom siv tiv thaiv.
