Ukwandiswa kwe-diameter yiteknoloji yokucubungula uxinzelelo esebenzisa i-hydraulic okanye i-mechanical means ukusebenzisa amandla ukusuka kudonga lwangaphakathi lombhobho wensimbi ukwandisa umbhobho wensimbi ngaphandle. Indlela yomatshini ilula kwaye isebenze ngakumbi kunendlela ye-hydraulic. Uninzi lweyona mibhobho edityanisiweyo edityanisiweyo yobude obukhulu yehlabathi isetyenzisiwe kwinkqubo yokwandiswa. Inkqubo yile:

Ukwandiswa komatshini kusebenzisa ibhloko yecandelo lokwahlula ekupheleni kwe-expander ukuze kwandiswe kwicala le-radial ukuze i-tube engenanto inyathelwe kwicala lobude ukuqonda inkqubo yokuguqulwa kweplastiki yobude betyhubhu yonke kumacandelo. Yahlulahlulwe yangamanqanaba ama-5

1. Inqanaba lokuqala lokusondeza. Ibhloko emise okwefeni ivulwa de zonke iibhloko ezimise okwefeni zichukumise udonga lwangaphakathi lombhobho wentsimbi. Ngeli xesha, i-radius yendawo nganye kwi-tube yangaphakathi yepayipi yensimbi ngaphakathi kobude besinyathelo iphantse ifane, kwaye umbhobho wensimbi ujikeleze ekuqaleni.

2. Inqanaba ledayamitha eliqhelekileyo. Ibhloko ene-fan-shape iqala ukunciphisa isantya sokuhamba ukusuka kwindawo yangaphambili ide ifike kwindawo efunekayo, eyona ndawo ingaphakathi ejikelezayo yombhobho ogqityiweyo ofunwa ngumgangatho.

3. Inqanaba lembuyekezo ephindiweyo. Ibhloko ene-fan-shape iya kucotha ngakumbi kwisithuba senqanaba lesi-2 de ifike kwindawo efunekayo, eyindawo ye-circumference yangaphakathi yombhobho wensimbi ngaphambi kokuba iphinde ibuyele njengoko ifunwa yinkqubo yoyilo.

4. Ukubamba uxinzelelo kunye nenqanaba elizinzile. Ibhloko yecandelo ihlala imile okwethutyana phambi kokuba iphinde ibuyele kumjikelo wangaphakathi wombhobho wentsimbi. Oku kukugcina uxinzelelo kunye nesigaba esizinzile esifunwa sisixhobo kunye nenkqubo yokwandisa ububanzi.

5. Inqanaba lokukhulula kunye nokubuya. Ibhloko yecandelo lihlehla ngokukhawuleza ukusuka kwindawo yomjikelezo wangaphakathi wombhobho wensimbi ngaphambi kokuba ibuyele, ide ifike kwindawo yokuqala yokwandisa, eyona nto incinci ye-contraction diameter yebhloko yecandelo elifunwa yinkqubo yokwandisa ububanzi.

Kwizicelo ezisebenzayo, kwinkqubo yokwenza lula, inyathelo lesi-2 kunye nelesi-3 lingadibaniswa kwaye libe lula, elingachaphazeli umgangatho wokwandiswa kombhobho wensimbi.