= Doi voi cac duong thang de cat ta co the dung mo cat cam tay bang ngon lua khi chay voi oxy:

+ doi voi tam day: ( ve hinh)

-- khi bat dau cat dat mo cat nghieng 1 goc 5 - 10 do voi khoang cach tu dau cat cho toi be mat vat cat tuy thuoc vao chieu day vat cat va so hieu dau cat.

-- ho diem bat dau cat cho den khi thay no sang len sau do mo luong khi oxy cat ( bop can o tay cam) va bat dau qua trinh cat luc nay nghieng dan mo cat voi goc 20 -30 do

+ Doi voi tam mong: mo cat duoc dat gan nhu vuong goc voi be mat chi tiet

+ doi voi cac duong cat cong phuc tap ta dung may cat tu dong CNC : May cat CNC duoc dieu khien chuyen dong cua dau cat theo 2 truc XY cung nhu duoc thuc hien boi 2 dong co chuyen dong cua 2 dong co nay duoc dieu khien bang may tinh. ban ve duoc duoc vfe trn may tinh thong qua cac giao dien de chuyen doi thanh cac tinh hieu de dieu khien chuyen dong cua cac dong co theo cac duong da chi dinh san tren ban ve cua may

-- SAU KHI CAT XONG TA DUA SSANG MAY UON DE TIEN HANH UON TON:

+ QUY TRINH UON ONG TREN MAY CAN HO:

-- May can ho co kha nang nang 1 dau truc len va thao 1 trong 2 o do dau truc khi can thiet lay truc ra.

-- cac tam ton khi dua vao may uon phai duoc dnh dau ro rang duong uon tuc la duong song song voi truc can. nau tam cong hinh con thi phai danh dau 1 so duong uon doc theo dung sin. tren cac tam ton do can phai vach dau uong suon de tao dieu kien kiem tra hinh dang cong bang cac duong va cung phai ghi ro tam ton dung vao chi tiet ket cau nao.

-- khi uon theo truc ta dat mep truc // voi truc can , nang truc can tren len 1 doan sao cho tam ton lot vao giua cac truc can

-- sau do ta ha truc can tren xuong tung buoc 1 sau moi lan can. can trnh ha qua sau truc can ngay tu dau, nhu vay co te gay ran nut be mat tam ton

-- doi voi cac tam ton hinh tru hoac hinh con bao gio cung con du 1 doan mep thang (ko duoc uon) doan do co chieu rong bang chieu dai doan tiep tuyen tu mep tren truc can duoi. phan mep thang nay gay kho khan cho viec lap rap sau nay, de uon mep tam ta co the dung cac vat chem hoac tam dem day va dai hon phan mep thang.

-- trong truong hop tam co dang cong voi chieu canban kinh khac nhau tren cung chieu rong voi cac ban kinh cong ko nhieu co the uon tam theo ban kinh cong nho nhat sau do dung bua hoac may ep de uon ra (nguoc voi chieu uon ban dau) neu cac ban kinh cong khac nhieu co the dung thanh go hoac thanh sat dem doc theo chieu dai nhung phai can than de tranh lam hu hong truc. doi voi cac tam cong 2 chieu co duong cong doc ko lon co the uon bang cach dung cac tam dem bang thep dai tu 1- 2 m rong tu 100- 150 mm chieu day phu thuoc vao do lon cua duong cong nhung ko duoc qua 50 mm.

-- sau khi can xong ta nang 1 dau truc va thao 1 trong 2 o do o dau truc ra va lay vat uon ra ngoai