Основной каталог Kyocera 2021 - 2022 - страница 763

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Trouble shooting (DRV / DRX / DRZ / DRX)Trouble shooting (DRV / DRX / DRZ / DRX) Toolholder DRX

Trouble shooting (DRV / DRS / DRZ / DRX)

Trouble conditionConditionCauseCountermeasures
Hole diameter becomes smaller (At hole bottom)A B (Bottom side) (Inlet side)There is no problem for inlet, however gradually hole diameter is getting smaller at the bottom. A>BChip jam (External or internal edge chip stuck)Change the cutting conditions · Increase the cutting speed · Lower the feed rate
Hole diameter becomes larger (At hole bottom)B' (Bottom side) (Inlet side) AThere is no problem for inlet, however gradually hole diameter is getting larger at the bottom. AInternal edge chip jam.Change the cutting conditions · Increase the cutting speed · Lower the feed rate
Hole diameter is small (From the hole inlet)Hole diameter is small from inlet. (At turning moment)Inappropriate adjustment of hole diameter.In case of using lathe machine, use X-axis and adjustment hole diameter.
No core at internal edge. (No core remains)Adjust the center height.

Magic Drill DRX hole bottom shape (mm)

Indication of tool life of MagicDrill

DC A B C DC A B C DC A B C

How to judge tool lifeIndication of judging tool life
Judgement of tool condition and insert wear· When an insert is new, the toolholder is slightly bent to the side during drilling (therefore, the drill diameter is slightly bigger during drilling). Once drilling is finished, the toolholder will return back to normal size. No tool marks will appear on the finished surface (This depends on workpiece and cutting condition. Slight tool mark might appear if cutting force on external dia. is too low.) · When an insert is at the end of its tool life, gradually the external corner part gets worn out. Also the toolholder does not bend slightly outwards, and it starts to bend inwards. After the drilling is finished, the toolholder returns to the normal position. When taking off a toolholder under this condition, the cutting edge of the insert creates external tool marks on the finished surface of the workpiece.
Checking hole diameterWhen hole diameter is measured, suddenly it shows small diameter. In this case, a worn out insert can be the cause and it must be exchange.
Checking the surface on the outlet sideIf insert wear progresses, the burrs of penetrated hole entrance becomes bigger. This is a clear indication that the tool must be exchanged.
Variation of drilling noiseLight drilling noise at the beginning turns to brady noise which contains vibration noise.
Variation of vibrationAs the end of tool life is getting closer, there is more vibration and the drilling noise changes. However, when drilling smaller diameters these factors are difficult to detect.

1.1 1.8

20.57.934.012.356.020.9
21.08.135.04.7 12.857.021.41.9
0.8
21.58.436.013.31.258.021.9
2.0
22.07.837.013.859.022.4
1.3
22.58.138.014.360.022.92.1
23.03.2 8.30.8
23.58.6Common for 2D, 3D, 4D, 5D

* Above is numeric guideline. (Varies within ±0.1mm depending on workpiece materials and cutting conditions)