Cob phum kev sib txuas: ib suam ntawm tus txheej txheem thiab

Ntsaws cov kab nrib ntsiab thiab lug yuav tau muab faib mus rau hauv ob lub ntsiab pawg: detachable thiab tas mus li kev sib txuas. Cov yav tas los xws li cov neeg uas yuav tsum noj sib nrug tsis ua kom cov ntseeg ntawm tus fastening ntsiab. Qhov no fastening nrog lub ceev, bolts, pins, screws, tag nrho cov kev sib txuas nrog cov xov thiab tsis tau nws. Ib-piece pom tau hais tias yog cov nyob rau hauv uas disassembly muaj mus ua txhaum fasteners.

Cov muaj xws li: welded, glued, riveted, soldered thiab seaming. Detachable thiab tas mus li kev sib txuas lug siv nyob rau hauv tej yam industries. Hauv qab no, peb saib txhua lub hom nyob rau hauv ntau yam.

plug-nyob rau hauv kev sib txuas

Lawv tua yog drilling ib lub qhov ntawm ib nyuag loj inch tshaj lub kho neeg (ib tug ntsia hlau los yog ntsia liaj qhov rooj). Qhov no yog ua kom paub meej tias tag nrho ob qho tau nyob ua ke los ntawm tus leej qhov. Cov kev ua yuam kev nyob rau hauv lub offset ntawm ib millimeter, tshwj xeeb tshaj yog rau cov ntsiab nrog ib tug loj tus naj npawb ntawm fasteners. Thaum uas siv cov bolts thiab screws rau luag tus txha lawv muab tso rau ib tug txiv thiab washer.

Thawj muab tso nyob rau hauv ib tug thib ob rau ib tug taag kev twb kev txuas, nws tsis muab cov ntsiab lus ntawm kiv. Muaj yog ib tug caij nplooj ntoos hlav lub nplhaib uas muaj ob tug ntse hniav. Lawv nws abuts tiv thaiv cov workpiece thiab lub workpiece, li no tiv thaiv cov txawj unwinding ntawm lub noob txiv.

Screws zawm lub qhov chaw, tej lub threads lawv tus kheej. Thaum siv ceev thiab txuas yog tsis xav tau. Studs yog siv thaum uas txuas mus rau cov khoom qhov chaw lwm. Nws muaj ib tug xov ntawm ob xaus, lub preform nyob rau hauv nws yog drilled ib qhov loj tshaj qhov ntev ntawm lub xov studs.

tas mus li kev twb kev txuas

Lawv yog:

• welded;
• rivets;
• solder;
• nplaum.

Tej hom ntawm mus tas li kev sib txuas tau thov nyob rau hauv tej qhov chaw ntawm lawm. Cia peb xav txog txhua yam uas lawv nyias.

vuam

Ib tug compound ntawm me nyuam los tu los ntawm cov interatomic bonds ntawm qhov chaw qhov chaw thaum cov cua kub yog hu ua ib tug weld. Cob phum txuas, weld uas tau raug zoo ua, mus txog qhov yuav tsum tau lub dag lub zog, nqi yuav txo tau, thiab poob qhov chaw.

Qhov chaw ntawm cov cua kub hais tej zaum yuav:

• lub molten slag;
• gas nplaim taws;
• arc;
• ntshav;
• lub laser beam.

Hlau, uas yog yuav tsum tau welded, qhov yooj yim hu. Thiab ib tug uas yog siv nyob rau hauv da dej - muab tub lim.
Cov zajlus, tack-welded nyob rau hauv no txoj kev no yog hu ua ib tug weld.

Kev npaj ntawm mus tas li kev sib txuas tej zaum li yuav tus nram qab no:

• hu vuam;
• elektorodugovaya txhais tes;
• tsis siv neeg submerged arc vuam thiab semi-automatic;
• arc.

Lub leeg yog tseem subdivided rau hauv:

• taub qab;
• overlapped;
• ces kaum;
• T-bar.

Tej yam no yuav tsum yog ib tug-txoj kev los sis ob-txoj kev. Lawv muab faib ua discontinuous thiab tas mus li. Muaj kuj yog ib tug txawv nyob rau hauv tus ntoo khaub lig-sectional zoo: tej leeg, concave los yog convex.

zoo:

1. Cov uas tsis muaj nqi ntawm xws ruaj khov kev sib txuas, vim tsis muaj kev txhawj ntawm suture thiab me me siv ntawm zog cov tswv yim.
2. Cov kuj me me loj nyob rau hauv kev sib piv nrog rau lwm cov kev ua hauj lwm.
3. Tsis xav ua kom qhov nyob rau hauv lub qhov uas muab lub dag lub zog nyob rau hauv nws tus ntoo khaub lig-section.
4. Automation ntawm lub vuam txheej txheem ceev ceev.

disadvantages:

1. Cov tsos tom qab deformation thiab warpage ntawm lub chaw ua hauj lwm ua, thiab qhov tshwm sim ntawm residual kev nyuaj siab.
2. Braves me ntsis co thiab poob siab.
3. Nyuaj nyob rau hauv kev tswj.
4. Cov neeg ua hauj lwm koom nyob rau hauv tas mus li kev twb kev txuas ntawm qhov chaw los ntawm welding, yuav tsum tau mus los ntawm txoj kev kawm thiab paub meej tias lawv tsim nyog.

soldering

Paub meej ntawm txoj kev brazing solder sib raug zoo rau cov kev taw qhia ntxiv hlau.
Wherein cov tshuaj lo melting kub yuav tsum muaj tsawg tshaj li cov tuaj koom qhov chaw. Raws li qhov no txog kev paub solders yog distinguished:

• osobolegkoplavkie. Tsim nyog lawv cov melting kub yog ib yam uas 145 degrees;
• muag los sis fusible. Ua hauj lwm cov cua kub yog tsis siab tshaj 450 degrees Celsius;
• nyuaj los yog nruab nrab meltability. lawv melting kub yog nyob rau hauv lub chav los ntawm 450 mus 600 degrees;
• kub los yog kub. Tej co yaj ntawm kub tshaj 600 degrees Celsius.

solders

Raws li lawv lub caij nplooj zeeg, nyob ntawm seb cov tivthaiv:

• tin-lead (PIC);
• tin (software);
• zinc (PC);
• silver (Sep);
• tooj liab-zinc (PMC, tooj dag).

Feem ntau ntawm cov hauj lwm nyob rau hauv lub solder manufactured siv tin-lead khoom, hom POS. Raws li ib tug txoj cai, lawv yuav tso tawm nyob rau hauv daim ntawv ntawm cov nyob ntawm tej, ib daim hlab los yog sticks.

Ua ntej cov tshuaj lo chaw zoo ntxuav. Hais tias lawv tsis oxidize, siv ib tug tshwj xeeb soldering flux. Qhov no tshuaj tsis tsim ib qho oxide thiab clears lawv los ntawm lub workpiece nto txhawb rau ib tug zoo dua kis tus kab mob ntawm cov tshuaj lo. Ib tug tej yam zoo ntawm ib tug flux haum rau ib tug kev kub saum toj no uas nws tsis tu tsis tseg khiav lag luam thiab yog combusted.

RIVET

Qhov no compound, uas tsim nrog tshwj xeeb khoom - rivets. Nws muaj ib tug kav thiab ib lub taub hau. Cov txheej txheem rau muab tas mus li kev twb kev txuas tshwm sim vim tsim nyob rau lwm kawg ntawm tus ib feem ntawm lub kaw lub taub hau, nws yog tau ua los ntawm compressing lub kawg ntawm tus pas nrig. Qhov no tsim tsis txawj thaum kaw-end. Nws tseem tsis tau mus offset qhov chaw txheeb ze rau txhua tus lwm yam.

Yog siv rau cov kev kho qhov chaw ntawm me me thickness, feem ntau ntawm daim ntawv cov ntaub ntawv, los yog qhov twg kev siv ntawm siab kub yog tsis tsim nyog vim hais tias ntawm cov tau deformation ntawm qhov chaw. Thaum rivets nyob ze, lawv tsim ib tug riveted ob leeg.

Khoom cov ntsiab yuav tsum phim qhov chaw fastened, txwv tsis pub nws yuav tshwm sim galvanic xeb vim txawv ntawm thermal expansion coefficients. RIVET hau yog cov puag ncig, tsis pub leejtwg paub, polupotaennye thiab tiaj tus.

goodies

Qhov zoo ntawm qhov tam sim no compound:

1. Tau los mas hnyav co thiab tej yam loads uas yuav them tsis taus Vuam.
2. Daim ntaub ntawv muaj xws li cov ntaub ntawv uas yog tsis welded los yog cov txheej txheem yog ntev heev.
3. Tsis siv kub muaj peevxwm thaum kev cob cog rua.

cons

Cov nram qab no cov ntsiab lus tej zaum yuav tau muab sau tseg nyob rau hauv lawv:

1. Loj tau ntawm hlau nyob rau hauv lub chaw ua hauj lwm ua.
2. Qhov nce nyob rau hauv hnyav ntawm cov qauv.
3. Lub siab zog siv.
4. Manufacturability tsawg txheej txheem.

nplaum

Yog xav tau ib tug muaj zog tas mus li kev twb kev txuas, nws yog txaus mus cuag lub chaw nrog nplaum. Qhov kev txiav txim yuav siv sij hawm qhov chaw ntawm lub tsim ntawm intermolecular bonds nyob rau theem ntawm qhov chaw ntawm lub ua ke ib feem thiab cov nplaum zaj duab xis.

Daim ntawv thov ntawm no txoj kev muaj peev xwm yuav nrhiav tau nyob rau hauv cov lug ntawm ntaub ntawv sib txawv. Mounting los ntawm nplaum thov txawm nyob rau hauv tus choj kev tsim kho thiab aviation. Lub durability ntawm xws li ib tug compound thiab nws zoo yuav nyob ntawm seb qhov kev npaj ntawm chaw ntawm qhov chaw thiab lub siab zoo ntawm load uas yuav ua rau lawv. Nws yog tsim nyog los nqa tawm tu chaw ntawm xeb thiab roj, tom qab lub kho cheeb tsam nrog ntwav txhuam ntoo.

Glued qhov chaw, nyob rau hauv uas lub load yuav ua kom shear los yog twist yuav tsum tsis txhob yuav nyob rau hauv ib tug me me hlws ris cheeb tsam. Qhov no yuav ua nyob rau hauv ib tug tsis muaj zog. Zoo muab tus qhov chaw uas yog yuav muaj kev xaav txheeb ze rau txhua tus lwm yam los yog tensile load.

Zoo rau lub nplaum hom:

1. Yog li ntawd nws yog tau mus cuag tej preform thiab designs, tsis hais ntawm lawv lub cev, loj, los yog cov ntaub ntawv uas.
2. High kuj mus corrosion.
3. Ceev ceev, uas tso cai rau ua hauj lwm nrog pipelines.
4. Nws tsis ua rau deformation ntawm lub qhov chaw.
5. Kev nyuaj siab concentration yog tsis generated.
6. Txhim khu kev qha cov lag luam nyob rau hauv kev co loads.
7. Cov uas tsis muaj nqi ntawm consumables.
8. Adhesive cohesive sib txuas yog tsis hnyav zog siv.

cons:

1. Tsis tshua muaj zog, tshwj xeeb tshaj yog thaum lub tev load.
2. Fragility, tej yam adhesives yuav loj hlob laus.
3. Tsis tshua muaj kuj mus tshav kub load.
4. Muaj ntau lub tebchaw tau mus los ntawm ib tug qeeb shutter ceev ua ntej lub lag luam.
5. Yuav Tsum kev nyab xeeb kev ntsuas.

Polyethylene-tas mus li kev twb kev txuas hlau

Lub thoob plaws siv rau pub ntxiv tshaj steel kav thiab polyethylene niaj hnub mus ib txhis kev twb kev txuas tau polyethylene-hlau.

Nws tso cai rau koj mus securely muab ntawm ib lub hnab yas thiab cov hlau kav raws li zoo raws li tsim kom muaj cov kev tsim nyog qhov cuab lub zog rau cem quav. Ua los ntawm ib tug kev txheem los mus tsim ib qho inseparable qauv siv polyethylene kav. Npaj steel tas mus li kev twb kev txuas (PE-steel adapter) los ntawm Vuam hlau feem nrog lub polyethylene yeeb nkab. Siv tus qauv no yuav ua tau raws li kaus mom rau roj thiab dej ntsiab tes hauj lwm.

Tej tas mus li kev twb kev txuas kav dej yog mounted rau pipelines tsev. Koj muaj peev xwm feem ntau yuav nrhiav tau nyob rau hauv lub boilers. Kev siv ntawm steel kav nyob rau hauv peb lub sij hawm yog nce supplanted analogue polyethylene. Qhov no yog vim lub cuab kom zoo dua ntawm yas kav tshaj hlau. Yog li ntawd, lawv yog siv ntau feem ntau. Cob phum kev sib txuas polyethylene-steel li txhim khu kev qha uas tsis yuav tsum tau tshwj xeeb txij nkawm.

Nws installation yuav siv sij hawm qhov chaw ncaj qha rau hauv av tsis muaj qhov siv ntawm qhov dej. Installation yog ua los ntawm vuam lossis taub qab thermistor. Polyethylene-tas mus li kev twb kev txuas yuav tsum steel nrog cov reinforcing lub tes tsho los yog tsis muaj nws. Qhov no yog ib feem muab lub adapter tus muaj peev xwm los mus tiv tau ib tug ntau siab thiab ib tug tas mus load ntawm 1 MPa. tsis muaj coupling adapter yuav tsis tau withstand lub siab ntawm 0.6 MPa. hlau compound nrog polyethylene zaum yuav tshwm sim los ntawm ib tug xov los yog los ntawm kev thov ntau yam flanges.

Yog li ntawd, peb ntsia lub ntsiab hom tebchaw, lawv zoo thiab disadvantages.