Каталог Tungaloy глубокое сверление 2 - страница 26

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Cu t ting condition a nd chip form

Chip form in deep hole drilling How to decide the chip form

Chip form plays a key role in STS (Single tube system)Generally, chip length should be 3 - 4 times its width,
and DTS (Double tube system) while large-volume andbut tends to be longer with difficult-to-cut materials. In
high-pressure coolant do so as well. Because chipsthat case, chip evacuation will be improved by making
are removed through the tube with coolant, properchips thinner, usually by reducing the feed rate.
chip formation is essential for smooth and steadyThe graph below shows chip formation for different
evacuation.cutting speeds and feeds. Short chips are created by

reducing the cutting speed or increasing the feed.

Chip formation

Chip formation is affected by multiple factors, such as workpiece material, chipbreaker geometry, cutting speed, feed, type of coolant, and coolant temperature. Suitable chip formation depends on cutting operation but is controllable by changing the cutting conditions.

0.10 0.15 0.20

Condition f Workpiece material: Low alloy steel (AISI4340)

Feed: (mm/rev)