Ntlha ea 1: Kenyelletso ea mathata a tloaelehileng ka shrinkage nakong ea ts'ebetso ea extruder:
Tlhahisong ea extrusion ea profiles ea aluminium, liphoso tse tsejoang e le shrinkage li tla hlaha sehlahisoa se felileng kamora ho khaola hlooho le mohatla kamora tlhahlobo ea alkali etching. Thepa ea mochini ea li-profiles tsa aluminium tse nang le sebopeho sena ha li finyelle litlhoko, li beha likotsi tsa polokeho.
Ka nako e ts'oanang, ha li-profiles tsa alloy aluminium tse hlahisoang li etsoa tlas'a phekolo ea holim'a metsi kapa ts'ebetso ea ho fetola, ho ba teng ha sekoli sena ho senya tsoelo-pele ea ka hare ea thepa, e tla ama bokaholimo bo latelang le ho qeta. Maemong a tebileng, e tla etsa hore matšoao a patiloeng a hlajoe kapa a senyehe sesebelisoa sa ho fetola le likotsi tse ling, sena ke bothata bo tloaelehileng tlhahisong. Mona, sehlooho sena se hlahloba ka bokhutšoanyane mabaka a ho thehoa ha aluminium profil shrinkage le mekhoa ea ho e felisa.
Ntlha ea 2: Ho hlophisoa ha shrinkage ka har'a profil ea aluminium e extruded ka li-extruder: shrinkage e se nang letho le shrinkage ea annular:
1) Ho fokotseha ho hoholo: Ho thehoa sekoti bohareng ba mohatla oa li-profiles le mekoallo e fetisitsoeng. Karolo ea sefapano e hlaha e le sekoti se nang le mahlakore a maholo kapa sekoti se nang le likarolo tse tletseng litšila tse ling. Tataiso ea longitudinal ke khoune e bōpehileng joaloka funnel, ntlha ea funnel e shebane le tataiso ea ho phalla ha tšepe. Haholo-holo e hlaha ka sefofane se le seng sa sefofane se bolaeang, haholo-holo mohatleng oa li-profiles tse fetisitsoeng ka li-coefficients tse nyenyane tsa extrusion, lihlahisoa tse kholo tsa lihlahisoa, marako a teteaneng, kapa li-gaskets tsa extrusion tse entsoeng ka oli.
2) Ho fokotseha ha selemo: Lipheletsong tse peli tsa sehlahisoa se entsoeng ka extrusion shunt, haholo-holo hlooho, ke mehele e sa khaotseng kapa li-arcs, 'me sebopeho sa crescent se hlakile haholoanyane mahlakoreng ka bobeli a mohala oa welding. Ho fokotseha ha annular ea sehlahisoa se seng le se seng sa lesoba ho na le symmetrical.
Lebaka la ho thehoa ha shrinkage: Boemo ba mochine bakeng sa ho thehoa ha shrinkage ke hore ha sethala sa advection se fela 'me gasket ea extrusion e atamela butle-butle ho shoa, extrusion e eketseha' me e hlahisa khatello ea dN ka lehlakoreng le ka lehlakoreng la barrel extrusion. Matla ana hammoho le friction force dT cylinder, ha boemo ba ho leka-lekanya matla dN cylinder ≥ dT pad e senyeha, tšepe e teng ho pota-potile sebaka sa extruded gasket e phalla morao ka morao ho ea bohareng ba sekheo, e etsa shrinkage.
Ntlha ea 3: Ke maemo afe a extrusion a bakang shrinkage ho extruder:
1. Lintho tse setseng tsa Extrusion li siuoa li le khutšoanyane haholo
2. The extrusion gasket ke mafura kapa litšila
3. Bokaholimo ba ingot kapa boea ha boa hloeka
4. Bolelele ba ho khaola sehlahisoa ha bo lumellane le melao
5. Lesela la cylinder ea extrusion le tsoa ho mamello
6. Lebelo la extrusion le eketseha ka tšohanyetso.
Ntlha ea 4: Mekhoa ea ho felisa shrinkage e entsoeng ke mechini ea aluminium extrusion le mehato ea ho fokotsa le ho thibela ho thehoa ha shrinkage:
1. Latela ka tieo melao ea ts'ebetso ea ho khaola le ho hatella ho feteletseng, ho bona hlooho le mohatla, ho boloka lesela la moqomo oa extrusion le tiile, thibela li-gaskets tsa extrusion tsa oli, ho fokotsa mocheso oa molamu oa aluminium pele ho extrusion, le ho sebelisa likhase tse khethehileng tsa convex. Khetha bolelele bo lekaneng ba boitsebiso bo setseng.
2. Libaka tsa lisebelisoa tsa extrusion le melamu ea aluminium li lokela ho hloeka
3. Hangata hlahloba boholo ba cylinder ea extrusion 'me u nkele lisebelisoa tse sa tšoanelehang sebaka
4. Extrusion e boreleli, lebelo la extrusion le lokela ho fokotseha nakong ea morao-rao ea extrusion, 'me botenya bo setseng bo lokela ho siuoa ka mokhoa o nepahetseng, kapa mokhoa oa extrusion oa ho eketsa lisebelisoa tse setseng o lokela ho sebelisoa.
Ntlha ea 5: E le ho felisa ka katleho ketsahalo ea shrinkage nakong ea tlhahiso ea mechine ea extrusion ea aluminium profile, botenya bo feteletseng ba extruder bo boetse bo hloka ho lebisoa tlhokomelo ho eona. Lintlha tse latelang ke litšupiso bakeng sa botenya bo feteletseng:
Extruder tonnage (T) Extrusion thickness (mm)
800T ≥15mm 800-1000T ≥18mm
1200T ≥20mm 1600T ≥25mm
2500T ≥30mm 4000T ≥45mm
E hlophisitsoeng ke May Jiang ho tsoa ho MAT Aluminium
Nako ea poso: Aug-14-2024
