Каталог Iscar сверла со сменной режущей частью 2022 - страница 130

Chip jamming Broken Screw

Rotating drill

• Improve chip formation (change chipbreaker type or cutting condition)
• Increase coolant pressure Non-rotating drill
• Improve chip formation (change chipbreaker type or cutting condition)
• Increase coolant pressure

Deflection

• Use recommended torque wrench
• Lubricate the screw before tightening

Insufficient machine power-

• Reduce speed and feed
• Use recommended chipbreaker for low feed

Insufficient machine torque

Rotating drill

• Use shorter drill overhang (if possible)
• Reduce feed by 30-50%
• Check that overlapping is correct between inner and outer inserts
• Check inner insert is positioned over center within its limits
• Increase coolant pressure
• Change the insert chipbreaker
• Stabilize clamping device Non-rotating drill
• Check misalignment
• Check that overlapping is correct between inner and outer inserts
• Check inner insert is positioned over center within its limits
• Rotate drill 180 degrees
• Increase coolant pressure
• Change the insert chipbreaker

• Reduce feed
• Use recommended chipbreaker for low feed

Chip Formation Problems

Long chip/ Chip jamming: This typical problem with stainless or low carbon steel, can affect hole quality, especially on surface finish, and in some cases can cause insert or tool breakage.

Optimal Shape Too Long Too Tight

upper limit.