ʻO ka pahu ʻaila he hui pōkole, ke kumu o kēia ʻano ma muli o nā hemahema o loko e like me ka roller a shaft eccentricity, a i ʻole ka mana welding nui, a i ʻole nā ​​kumu ʻē aʻe. Ke piʻi aʻe ka wikiwiki o ka welding, piʻi ka wikiwiki o ka extrusion tube blank. Hoʻomaʻamaʻa kēia i ka extrusion o nā ʻāpana metala wai a me nā oxides i hoʻomehana ʻia i ka heheʻe i ka weld kiʻekiʻe. I ka manawa like, hiki i ka hoʻonui ʻana i ka wikiwiki wili ke hōʻemi i ka manawa hoʻomehana o ka ʻili o ke awāwa, i hiki ke hoʻopōkole ʻia ke kaapuni pōkole o ka ʻaila a hiki ke hōʻemi ʻia ka wahi wela.

ʻO ka mea ʻē aʻe, ʻaʻole ākea wale ka wahi i hoʻopili ʻia i ka wela, akā ʻo ka ʻāpana lahilahi o ka metala wai nui i hoʻokumu ʻia ma ka ʻili o ka groove e lilo i mānoanoa, a ua hana ʻia nā burrs nui, kahi e hōʻemi ai i ka maikaʻi o ka weld. Eia naʻe, i kekahi mana hoʻopuka, ʻaʻole hiki ke hoʻonui ʻia ka wikiwiki kuʻi ʻana me ka ʻole o ka palena. A i ʻole, ʻaʻole e hiki i ka wela ma nā ʻaoʻao ʻelua o ka puʻu billet i ka wela welding, i loaʻa kahi kīnā a ʻaʻole hoʻi i ka welding.

No ke kila kuhiliʻole, ʻo ka puʻupuʻu puʻupuʻu ripple coefficient o ka aila e pili ana i ka hoʻokumu ʻana o nā welds. ʻO ka kānana kaha e hoʻemi i ka ripple ma lalo o 1%. I ka wiliwili ʻana i ke kila kila, ʻo ke alapine he 200 welds me ka paʻakikī maikaʻi a me ke kiʻekiʻe o ka wela wela. . ʻO ka mea maʻamau, ʻo nā paia o loko a me waho o ka paipu welded e hoʻihoʻi ʻia mai ka wahi wili. Maikaʻi nā huʻa haʻahaʻa a me ka hoʻomau i ka manaʻo ʻana ua lawa ka mana wiliwili a ʻaʻole kūlike ke kūlana mechanical a ʻaʻole kūlike nā kūlana wiliwili ʻeleʻele a maikaʻi ʻole ka maikaʻi o ka weld.