Общий каталог ZCC-CT 2019 - страница 932

Indexable milling A

Cutting performances of different approach angles

Approach angle Depiction Explanation

Axial force is largest. It will bend when machining thin-wall work 45° piece, and reduces the precision of work piece. It is benefit to avoid fringe breakage of work piece when machining cast iron.

75° The main purpose is to resolve the radial cutting force, it is often B

used for general face milling.

90° The axial force is zero in theory, suitable for milling thin plate workpiece.

Inserts with wiper

Using standard inserts Using inserts with wiper C

fz fn Insert with wiper Standard insert

Normal surface quality High surface quality D

The wiper insert must protrude below the other inserts by 0.03–0.10 mm at axial direction, only that the wiping function can take into effect. Generally speaking, a cutter can assemble only one wiper insert. If the diameter of cutter is much bigger or cutter’s feed rate per revolution is bigger than the length of wiper edge, 2 to 3 wiper inserts can be assembled.

Cutting width Generally speaking, the relation between cutting width and tool cutting diameter is Dc = (1.2–1.5) ae. In the machining practice, it needs to avoid coincidence of tool center and workpiece center as much as possible.

E

Dc: Tool diameter ae: Lateral infeed

(1,2–1,5) ae Dc = ae