CNC Knowledge: During treatment, drilling bits crack and always cut the knife solution – 158 Machine Tool Network

One close power

reason:
1. The part will move downward under the drilling force of the forest, and the forest will rebound after drilling.
2. The tooltip is not rigid enough.
3. The drilling material is not strong enough.
4. The forest jumps too much.
5. The tightening is not rigid enough and the forest slides.

measure:
1. Reduce the cutting speed.
2. Increase the supply volume
3. Set the cooling direction (internal cooling)
4. Add a chamfer
5. Check and adjust the coaxiality of the forest.
6. Check if the back angle is reasonable.

Ligament dichotomy

reason:
1. The part will move downward under the drilling force of the forest, and the forest will rebound after drilling.
2. The tooltip is not rigid enough.
3. The drilling material is not strong enough.
4. The forest jumps too much.
5. The tightening is not rigid enough and the forest slides.

measure:
1. Choose a drill with a larger rear cone.
2. Check the pin beach beach beach (＜ 0.02 mm)
3. Use a pre-center forest to pierce the upper hole.
4. Use more rigid drilling bits, hydraulic children with neck sleeves or thermal narrowing kits.

Three severity of the tumor

reason:
1. caused by the chemical reaction between cutting materials and room materials (the low carbon content is high)

measure:
1. Improve the lubricant and increase the oil or additive content.
2. Improve cutting speed, reduce the power rate and reduce contact time.
3. If aluminum drilling, use non -covered surface breading bits.

Four broken knives

reason:
1. The spiral groove of the drilling bit is blocked by the cut and the cut is not discharged over time.
2. When the hole is drilled quickly, the supply volume is not reduced or the motorized in manual food.
3. When drilling soft metals like brass, the back of the forest is too large and the front area is not polite, so that the forest can turn automatically.
4. The drilling blade is too clear to cring, causing a cracking phenomenon and not beating quickly.

measure:
1. Starting the time for replacing the tool.
2. Improve installation and fixation, such as the increase in the support area and the increase in the tightening force.
3. Check the bearing of the pin and the sliding groove.
4. Use a high precision tool holder, such as the hydraulic tool medium.
5. Use materials with stronger tenacity.