Xác định chế độ cắt khi gia công rãnh xoắn trong lỗ sâu bằng phương pháp chuốt

NGHIEN cflu - TRAO DOI

XfiC DINH CHE DO C^T KHI Gifl CONG RflNH XOflN

TRONG L 6 SflU B^NG PHlTONG PHflP CHaOT

Nguyin Due Minh', Lai Anh 'I\ldn^ Nguyin Trpng Doanh^

'Bd Cdng an; ^Hpe vien Ky thuat Qudn sfl; 'Trfldng Dai hpc Bdeh khoa Ha Ndi

TOM TAT

Gia cong rdnh trong 16 sdu Id mgt vdn de cong nghe phUc tap, nhUng gia cong rdnh xoan la nan

gidi nhdt, dac biet vdi 16 co ti le L/D >50. Hien nay trinh do cong nghe cua nUdc ta chUa co khd ndng lam

chu hodn todn dugc cong nghe chuot rdnh xoan. Xdc dinh che do cat khi chuot rdnh xodn trong 16 sdu la

van de chinh dUdc de cap trong bdi bdo ndy.

ABSTRACT

Cutting drain in deep hole is one complex problem of technology, but cutting spiral drain is

extremely difficult specially with hole ratio L/D >50. Actual level of Vietnamese technology is not

completely able to master the spiral drain broaching. Estimating the cutting parameters in broaching

of drain in deep hole is one main subject of this paper.

l.GlOl THIEU

Cdng nghe chudt dflpc flng dung de gia

cdng eac chi tiet ed eac rdnh trong Id hoac rdnh

tren cae bl mat ngoai bang diing cu ed nhieu lfldi

cat. Dao chudt cd the Id dang thanh dinh hinh

vdi nhilu lfldi cat bo tri bdi chieu sdu eat gidm

dan. Dao chuot thflc hien chuyin ddng cat bang

phfldng phdp keo hoac day. Dung cu cat dflpc

dinh hfldng vdo ngay chinh be mat gia cdng.

Cdng nghe chudt dflpc sfl dung khi co yeu

eau eao ve dp chinh xdc va dp bdng bl mat. Chuot

kim loai cd thi dflpc chia Idm hai bfldc: chudt tho

va chudt tinh. Khac nhau ca ban day gifla hai bfldc

la chieu sau cat va tdc dp tiln dao. Tdc dp chuot

thdng thfldng ndm trong khoang: l-^15m/phutva

chieu sau eat rang: 0,02 -H 0,4 mm tuy thupc vao

he sd lfle cdn khi ehudt. Dp chinh xdc be mat gia

cdng cd thi dat den cap IT6 ho^c IT7 va dp bong

be mat cd thi dat tfl 0,8 den 0,4 pm. Khi gia c6ng

I Q TAP CHf CO KHf VI£T NAM So 4 (Thang 4 nam 2012)