加工条件・トラブルシュート | オーエスジー

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What are the causes and countermeasures for hole enlargement in drilling?

The enlargement of the hole is caused by the runout and vibration of the tool during machining.

In addition, the runout of the outer circumference during installation affects the hole diameter and hole position accuracy.


Even with a high-rigidity and high-precision drill such as t

No : 705
Published : Modified : 2024/08/28 02:29
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Do you need drilling centering?

Centering is used to improve hole position accuracy and to reduce unstable behavior during hole entrance machining.

Unless the hole position accuracy is strictly required, or the machining of slopes or spherical surfaces, centering is not always necessary.

If this is not the case, the use of a high

No : 712
Published : Modified : 2024/08/28 02:29
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Even though the hole position is centered, the hole position becomes unstable. What can be done to improve the accuracy of the hole position?

When the drill starts to hit the workpiece from the shoulder, it is not possible to get the hole position properly.

 

Defect examples

point angle 90° starting drill for chamfering,

No : 718
Published : Modified : 2024/08/28 02:29
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The drilled hole has a polygonal shape. Why?

This may be due to runout during drilling.

(1) Runout when installing the drill.

Solution: Keep the installation slip within 20 μm (0.020 mm).

(2) If the lip height of the drill at regrinding time (variation in the height of the left and right cutting edges) is large, the drill tip w

No : 721
Published : Modified : 2024/08/28 02:29
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What does the drill feed (mm/rev) mean?

The unit of feed (mm/rev) of the drill indicates how many millimeters the drill advances in one revolution. The unit is read as "milliper revolution".

 

OSG's Drill Catalog Condition Table lists the feed rate (mm/rev) per rotation of drills of major sizes in a range for each material. When referring to the feed

No : 737
Published : Modified : 2024/08/28 02:29
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What is the rotation speed when inserting a long drill into the guide hole?

As a guideline, reduce the rotation speed to 500 rpm or less when inserting a long drill (regardless of whether it is carbide or high-speed) into the guide hole. If the drill itself is very long, such as the ADO-40D/50D series, it will swing even more, so in order to prevent the cutting edge fr
No : 738
Published : Modified : 2024/08/28 02:29
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How deep can a hole be drilled? How much flute length do I need?

Since the drill digs while releasing chips, it is necessary to constantly drain chips from the trench to the outside. If you dig to the point where all the trenches are filled, you will not be able to drain the chips, and the chips will get stuck in the grooves and the dri

No : 919
Published : Modified : 2024/08/28 02:29
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Do you need to Pilot hole for large drilling?

If you have enough mechanical horsepower, you don't need Pilot hole . It is recommended to drill holes from a solid state.

When drilling after Pilot hole machining due to insufficient machine horsepower, etc., there is a risk that chips wil

No : 939
Published : Modified : 2024/08/28 02:29
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What is Step Machining? G83

Step machining is the action of stopping the hole drilling in the middle, taking the drill out of the hole once, and then machining again. By returning the drill to hole entrance , the chips are forcibly discharged and refueled at the same time. There are many movements in which the drill moves, and the mach
No : 7694
Published : Modified : 2024/08/28 02:29
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What is Dwell Machining? (Drilling)

Dwell machining is a machining method that temporarily stops the progress of machining while the drill spindle is rotated.

It may be used to improve the surface accuracy of the bottom of the hole or to improve chip discharge by processing with a drill with an oil hole.

(A) Machining (B) Stop (C) Improving the surface rou

No : 7763
Published : Modified : 2024/08/28 02:29

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