Page 93 - Carboloy Catalogue - English

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milling cutters
milling inserts
turning holders
turning inserts
techNICAL info
95
poor surface quality
Description and cause:
Causes are various, depend on work piece material,
cutting conditions (feed and cutting speed), cutting edge
condition, extend and type of wear, condition and rigidity
of machine-tool-work piece.
- wrong choice of tool
- wrong chip thickness
- wrong cutting speed
- coolant is needed
- high feed rate
Troubleshooting:
- use wiper insert
- use cutting insert with the right geometry
- reduce the feed rate
- change (usually increase) the cutting speed
- use a coolant
- improve the stability of the tool and work piece
- change the chip cross section
- select a more easy cutting chip breaker
- increase the nose radius
vibrations
Description and cause:
It is very frequent. The main reasons are an unbalanced
work piece or tool, pure stability of work piece, high rate
of cutting forces, tool overhang.
Troubleshooting:
- improve the stability of the tool and work piece
- reduce the depth of cut
- minimize tool overhang
- reduce the cutting speed
- use the tool with smaller setting angle
- reduce the chip cross section
- use the tool with low cutting resistance
- increase the feed rate
- select a more easy cutting chipbreaker
- increase the nose radius
burr
Description and cause:
It usually appears at machining of soft steels and plastic
materials.
Troubleshooting:
- use cutting insert with sharp cutting edge
- use cutting insert with positive geometry
- use tool with smaller setting angle
undesirable phenomena
DIMENSIONAL AND SHAPE INACCURACY OF WORK PIECE
Description and cause:
Depends on a number of factors.
Troubleshooting:
- use wear resistant cutting insert
- improve the stability of the tool and work piece,
minimize tool overhang
- use work piece with suitable machining allowance
turning