Mhinduro kuShrinkage Defect muAluminium Profile Extrusion

Pfungwa 1: Nhanganyaya kumatambudziko akajairika ne shrinkage panguva yeextrusion process ye extruder:

Mukugadzira extrusion yealuminium profiles, hurema hunozivikanwa se shrinkage huchaonekwa mune semi-yakapera chigadzirwa mushure mekucheka musoro nemuswe mushure mekutarisa alkali etching. Iwo ma mechanic properties ealuminium profiles ane chimiro ichi haazadzise zvinodiwa, achiisa njodzi dzekuchengetedza.

Panguva imwecheteyo, kana iyo yakagadzirwa aluminium alloy profiles inoiswa pasi pekurapwa kwepamusoro kana kutendeuka kugadzirisa, kuvepo kwechikanganiso ichi kunoparadza kuenderera kwemukati kwezvinhu, izvo zvinozokanganisa iyo inotevera pamusoro uye kupera. Muzviitiko zvakakomba, zvinokonzeresa kuti mavanga akavanzika araswe kana kukuvadzwa kwechishandiso chekushandura uye dzimwe njodzi, iri idambudziko rinowanzoitika mukugadzira. Pano, chinyorwa ichi chinoongorora muchidimbu zvikonzero zvekuumbwa kwealuminium profile shrinkage uye nzira dzekuibvisa.

Pfungwa yechipiri: Kurongeka kwe shrinkage mune yakawedzera aluminium profiles ne extruders: hollow shrinkage uye annular shrinkage:

1) Hollow shrinkage: Gomba rinoumbwa pakati pemuswe wekupedzisira we extruded profiles nemabhawa. Chikamu chemuchinjikwa chinoratidzika segomba rine mipendero yakakasharara kana buri rine mipendero yakazadzwa nehumwe tsvina. Iyo longitudinal kutungamira ikoni yakaita sefunnel, iyo muromo wefunnel yakatarisana negwara rekuyerera kwesimbi. Inonyanya kuitika mune imwe-gomba ndege inofa extrusion, kunyanya pamuswe wemaprofiles akaburitswa nediki extrusion coefficients, hombe chigadzirwa madhayamita, gobvu madziro, kana mafuta-yakasvibiswa extrusion gaskets.

2) Annular shrinkage: Migumo miviri ye extrusion shunt yakaumbwa chigadzirwa, kunyanya musoro, ndeye discontinuous rings kana arcs, uye chimiro chekrescent chinowedzera kuoneka pamativi ose emutsara we welding. Iyo annular shrinkage yegomba rega rega chigadzirwa ine symmetrical.

Chikonzero chekugadzirwa kwe shrinkage: Iyo mechanical mamiriro ekugadzirwa kwe shrinkage ndeyokuti kana danho rekutsvaga rinopera uye extrusion gasket zvishoma nezvishoma inoswedera pedyo nekufa, iyo extrusion inowedzera uye inogadzira dN yekumanikidza padivi pemvura ye extrusion barrel. Simba iri pamwe chete ne friction force dT cylinder, kana iyo force balance condition dN silinda ≥ dT pad yaparadzwa, simbi iri padhuze ne extruded gasket area inoyerera ichidzokera kumashure ichienda nechepakati pechisina chinhu, ichigadzira shrinkage.

Pfungwa yechitatu: Ndeapi mamiriro ekunze anokonzera shrinkage mune extruder:

1. Extrusion residual material inosara ipfupi

2. Iyo extrusion gasket ine mafuta kana yakasviba

3. Pamusoro peingot kana mvere haina kuchena

4. Kucheka-kureba kwechigadzirwa hakuenderani nemitemo

5. Iyo mbiru ye extrusion cylinder iri kunze kwekushivirira

6. The extrusion speed nokukurumidza inowedzera.

Point 4: Nzira dzekubvisa shrinkage yakaumbwa nealuminium extrusion michina uye matanho ekudzikisa uye kudzivirira kuumbwa kwe shrinkage:

1. Kunyatsotevedzera maitiro ekugadzirisa mitemo yekucheka uye kudzvanya yakawandisa, yakaona musoro nemuswe, chengetedza jira reiyo extrusion cylinder yakasimba, rambidza mafuta extrusion gaskets, kuderedza tembiricha yearuminiyamu tsvimbo isati yabuda, uye shandisa yakakosha convex gaskets. Sarudza hurefu hunonzwisisika hwezvinhu zvakasara.

2. Nzvimbo dzezvishandiso zveextrusion uye aluminium tsvimbo dzinofanira kunge dzakachena

3. Kazhinji tarisa saizi ye extrusion cylinder uye shandura zvisina kukodzera zvishandiso

4. Smooth extrusion, iyo extrusion speed inofanira kuderedzwa muchikamu chekupedzisira chekuwedzera, uye yakasara yakasara inofanira kusara zvakakodzera, kana nzira yekuwedzera yekuwedzera zvinhu zvakasara zvinofanira kushandiswa.

Pfungwa yechishanu: Kuti unyatso kubvisa chiitiko che shrinkage panguva yekugadzirwa kwealuminium profile extrusion michina, kuwanda kweiyo extruder inodawo kutariswa. Iyi inotevera ndiyo chiyero chereferensi yehukobvu hwakawandisa:

Extruder tonnage (T) Extrusion ukobvu (mm)

800T ≥15mm 800-1000T ≥18mm

1200T ≥20mm 1600T ≥25mm

2500T ≥30mm 4000T ≥45mm

Yakarongedzwa naMay Jiang kubva kuMAT Aluminium