I. Cov Ntsiab Lus Txhais thiab Cov Cai Ua Haujlwm
Lub hollow khoov thiab cov khoom khoov yog ob txoj kev khoov yooj yim rau kev sib sau ua ke ntawm cov raj square. Qhov sib txawv tseem ceeb nyob rau hauv seb lub phab ntsa sab hauv ntawm lub raj tsis muaj kev txhawb nqa thiab kev cog lus thaum lub sij hawm tsim. Ua ke, lawv tsim cov txheej txheem tseem ceeb ntawm cov kav dej square los ntawm sawb steel / round tube blanks rau square cross-section.
1. Muaj tseeb khoov (compaction khoov)
Qhov tseeb khoov yog hais txog "bending nyob rau hauv compaction tej yam kev mob", uas yog ib tug txoj kev uas ob lub puab thiab puab forming rollers tuaj rau hauv kev sib cuag nrog lub puab thiab sab phab ntsa ntawm lub raj billet ib txhij, thiab siv bidirectional compression thiab compaction.
- Kev khiav hauj lwm txheej txheem: Lub chaw tsim khoom yog nruab nrog ob qho tib si sab nraud thiab cov menyuam sab hauv. Thaum lub raj xa hluav taws xob hla dhau, cov txheej txheem sab nrauv thiab sab hauv raws li cov txheej txheem sab hauv thiab sab hauv ntawm lub raj phab ntsa, thiab ib txhij siv lub siab kom nruj thiab ua kom nruj rau qhov chaw khoov, yuam cov khoom kom tiav lub kaum sab xis khoov raws li cov menyuam cov duab. Lub deformation cheeb tsam yog ib txwm nyob rau hauv nruj txwv ntawm pwm.
- Core deformation nyhuv: Cov khoom nyob rau sab nraud ntawm qhov chaw khoov yog raug rau qhov nro, thaum cov khoom nyob rau sab hauv yog raug compression. Cov nyhuv tag nrho yog cov nyhuv tensile thinning - qhov ntev ntev ntawm txoj kab dabtsi yog khoov me ntsis shortens, thiab lub raj phab ntsa ntawm lub kaum sab xis yuav nyias vim qhov nro.
2. Empty Khoov (Ncua Khov Khoov)
Ib qho kev khoov khoob yog hais txog "qhov khoov qhov twg cov phab ntsa sab hauv raug tshem tawm". Nws yog ib qho txheej txheem uas tsuas yog cov menyuam sab nrauv hu rau sab nrauv phab ntsa ntawm lub raj xa hluav taws xob, thiab tsis muaj kev txhawb nqa cov menyuam rau ntawm phab ntsa sab hauv. Cov duab yog tsim los ntawm indirect deformation los ntawm dabtsi yog khoov lub sij hawm.
- Kev khiav hauj lwm txheej txheem: Nyob rau ntawm qhov chaw tsim khoom, tsuas yog tsim cov chais yog teem rau sab nraud ntawm lub raj xa dej, thaum tsis muaj cov yob rau sab hauv. Tom qab cov menyuam txheej sab nraud exerts siab ntawm lub raj phab ntsa, lub sij hawm khoov yog tsim raws li tus ntoo khaub lig-sectional stiffness ntawm lub raj billet, ua rau cov yas deformation nyob rau hauv lub khoov cheeb tsam. Cov khoom siv sab hauv yog nyob rau hauv "tshem tawm" lub xeev ntawm dawb deformation.
- Core deformation nyhuv: Cov khoom siv ntawm qhov chaw khoov yog compressed tag nrho, uas ua rau cov nyhuv compression thickening - longitudinal ntev ntawm txoj kab khoov me ntsis elongates, thiab ntawm lub kaum sab xis, cov hlau yuav thickened vim compression tsub zuj zuj.
II. Qhov tseem ceeb ntawm cov txheej txheem
Ob qhov txheej txheem tsis yog nyob rau hauv kev sib raug zoo tab sis yog cov txheej txheem tseem ceeb hauv kev tsim cov khaub thuas- tsim cov raj square profile. Lawv tus nqi yog nyob rau hauv:
1. Ua tau raws li tag nrho cov kev qhia tshwj xeeb ntawm kev tsim cov cai:
Qhov tseeb khoov daws qhov teeb meem ruaj khov ntawm tuab-walled thiab siab-precision square profile raj; Kev khoov khoob daws cov teeb meem tsim ntawm me me R- cov kaum sab xis, cov phab ntsa nyias, thiab cov ntoo khaub lig nyuaj- ntu, sau cov kev sib txawv thev naus laus zis uas tsis tuaj yeem ua tiav los ntawm kev khoov tiag tiag.
2. Ntsuas precision thiab efficiency:
Qhov tseeb dabtsi yog khoov kom ntseeg tau qhov tseeb ntawm qhov ntev thiab lub kaum ntse ntse, thaum Empty dabtsi yog khoov txhawb nqa ntau- dhau synchronous dabtsi yog khoov thiab ntug tiav, txhim kho cov khoom siv tau zoo thiab cov khoom lag luam nyuaj ntawm chav tsev.
3. Kho kom haum rau cov khoom sib txawv:
Rau cov ntaub ntawv uas tsis zoo plasticity thiab nws yuav ua rau tawg, Npuas dabtsi yog khoov tuaj yeem zam qhov kev pheej hmoo ntawm kev puas tsuaj los ntawm kev txo qis hauv thickness vim stretching ntawm qhov tseeb dabtsi yog khoov; Rau tuab -walled siab- cov ntaub ntawv muaj zog, Qhov tseeb khoov tuaj yeem tswj tau qhov rov qab thiab ua kom muaj kev ruaj khov.
Nyob rau hauv qhov tseeb txias dabtsi yog khoov tshuab, ob feem ntau yog siv nyob rau hauv kev sib xyaw ua ke: thawj ob peb hla dhau lub ntsiab lub kaum sab xis tsim los ntawm qhov tseeb dabtsi yog khoov, thaum lub tom kawg dhau mus cuag cov seem refinement thiab ntug ntev kho los ntawm khoob dabtsi yog khoov.
III. Kev sib piv ntawm qhov zoo thiab qhov tsis zoo
| Sib piv Dimension | Tiag tiag Bend | Hollow Khoov |
| Txoj kev tsim | Ob -txoj kev compression los ntawm ob sab hauv thiab sab nraud cov menyuam yaus, ua tiav kev sib sau ua ke | Tsuas yog sab nraud cov menyuam siv lub siab, sab hauv phab ntsa raug tshem tawm, khoov lub sijhawm sib sau |
| Deformation yam ntxwv | Stretching thiab thinning nyhuv, cov yeeb nkab phab ntsa ua thinner ntawm qhov khoov taw tes | Compression thiab thickening nyhuv, cov yeeb nkab phab ntsa thickens ntawm qhov khoov taw tes |
| Core Zoo |
1. Rebound me me heev, siab tsim lub kaum sab xis thiab qhov tseeb qhov loj me 2. Precise tswj ntawm sab hauv lub kaum sab xis R, raug cov menyuam cov duab ua rau cov khoom zoo sib xws 3. Muaj zog ruaj khov nyob rau hauv tuab - cov yeeb nkab phab ntsa tsim, ntug qhov chaw tsis tshua muaj kev ruaj ntseg |
1. tuaj yeem tsim cov kaum sab hauv me me (R < 0.2t, t yog phab ntsa tuab) thiab tsis tuaj yeem tawg 2. tuaj yeem ua tiav synchronous dabtsi yog khoov thiab ua tiav ntawm ntug sab saud / sab ntug, haum rau cov ntu nyuaj 3. Cov menyuam tiv tauj siab yog me me, qis pwm hnav, kev pab lub neej ntev dua |
| Core Disadvantages | 1. Cov yeeb nkab phab ntsa ntawm qhov taw tes khoov yog stretched thiab thinned, txo cov zog hauv zos 2. Cov kab bending muaj longitudinal contraction, ntev yuav tsum tau them nyiaj ua ntej 3. Cov menyuam bears lub siab loj, hnav sai, thiab cov nqi kho mob siab dua |
1. Tsis yooj yim rau kev tswj kev thim rov qab, kev tsim qhov tseeb yog qhov tsis muaj zog tshaj qhov khoov tag nrho 2. Thaum siab dhau lawm, ntug tsis ruaj khov thiab sab phab ntsa concave tsis xws luag yuav tshwm sim 3. Nyias-walled yeeb nkab txoj kev yog qhov yooj yim rau wrinkling, thiab cov kev hloov kho rau lub tshuab cuab yeej siab |
IV. Siv tau Scenarios
Cov kev siv tseem ceeb ntawm txoj kev khoov tiag tiag:
- Cov txheej txheem tseem ceeb rau cov tuab- cov phab ntsa square thiab cov kab plaub hau thiab siab - lub zog steel square thiab cov kab plaub hau;
- Cov qauv square thiab cov kab plaub hau nrog cov kev cai nruj rau qhov tseeb qhov tseeb thiab lub kaum sab xis (xws li hauv kev tsim kho tshuab, tsim cov qauv hlau, thiab cov khoom siv tsheb);
- Batch zus tau tej cov txheej txheem - qhov loj me square thiab square raj nrog ntau R-angles (R Ntau dua los yog sib npaug rau 0.5t).
Cov kev siv tseem ceeb ntawm hollow khoov:
- Kev tsim ntawm nyias- cov phab ntsa square thiab cov raj, nrog rau cov me me - cov square thiab cov kab plaub hau;
- Kho kom zoo nkauj thiab rooj tog zaum -qib square thiab cov raj nrog cov kaum sab hauv me me R;
- Ntau- dhau kev ua tiav thiab kho ntug ntawm qhov tshwj xeeb- zoo li tus thiab tsis yog - tus qauv square thiab cov kab plaub hau;
- Tsis txhob tawg los ntawm qhov tseeb khoov thiab ncab ntawm cov hlau tsis muaj steel thiab alloy steel square thiab cov kab plaub hau nrog cov yas tsis zoo.
V. Cov Txheej Txheem Xaiv: Yuav ua li cas xaiv ntawm Hollow Khoov thiab Khoov Khoom
Hauv kev tsim khoom thiab kev xaiv cov khoom siv tiag tiag, cov txheej txheem hauv qab no tuaj yeem siv rau kev txiav txim siab:
1. Raws li phab ntsa thickness
Rau cov lus qhia tshwj xeeb nrog cov phab ntsa tuab ntawm Ntau dua lossis sib npaug li 4 hli lossis cov neeg uas muaj feem ntau ntawm cov ntu tuab, cov cuab yeej khoov tau zoo dua los ua kom muaj kev ruaj ntseg; rau nyias- cov kav dej uas muaj phab ntsa thickness tsawg dua los yog sib npaug li 2 hli, hollow khoov yog qhov zoo dua kom tsis txhob dhau qhov thinning.
2. Raws li qhov xav tau ntawm lub kaum sab xis R tus nqi:
Rau cov ntse- lub kaum sab xis square lossis cov kav dej nrog R tus nqi tsawg dua 0.2t, hollow khoov yog qhov kev xaiv nkaus xwb; rau cov qauv R qhov tseem ceeb (0.5t - 2t), khoov zoo dua los xyuas kom meej.
3. Raws li qhov yuav tsum tau ua
Rau cov qauv thauj khoom-cov kabmob thiab siab- cov txheej txheem sib dhos, cov khoom siv khoov tau raug xaiv; rau cov hniav zoo nkauj, tiv thaiv npog, thiab lwm yam tsis yog -load- cov xwm txheej, hollow khoov tshuab tuaj yeem xaiv.
4. Raws li cov khoom siv:
Cov pa roj carbon steel thiab qis- alloy siab- lub zog steel yog tsim rau cov khoom khoov; stainless hlau, siab - alloy steel, thiab lwm yam., nrog tsawg plasticity, yog nyiam rau hollow khoov.
5. Raws li qhov nyuaj ntawm tus ntoo khaub lig-section:
Standard square thiab rectangular cross-sections yog ua los ntawm cov khoom khoov; nyuaj hla- ntu nrog cov duab tsis tu ncua thiab ntau qhov khoov yuav tsum muaj kev sib xyaw ua ke ntawm cov txheej txheem hollow khoov.
