What are the precautions for drilling titanium machined parts?

Release time：2023-03-07 16:57:09 丨 Number of visits：

It is difficult to punch titanium alloy. The drill bit is generally made of ordinary high speed steel and cemented carbide. It is better to use a double top angle of 118 ° or 90 °, because it can cut off chips and make them easy to remove. Timely chip removal is very important in the drilling process. If the chip is not removed in time, the bit will be stuck, broken and stuck.

High drilling temperature and pressure will enhance the bite effect of titanium machined parts, which will cause rapid wear of the tool and cause the hole to be out of round, skewed or uneven. The screw may break in the hole during subsequent tapping. To solve these difficulties, you can use a short and sharp drill bit, pour sufficient coolant in the cutting area, use low speed forced feed and use a solid support to support the workpiece, and pay special attention to not forming burrs at the exit.

Except for thin plates, heavy duty short type machine drill bits can be used for thick workpieces. For deep hole drilling, oil supply drill or a series of short drills with different lengths can be used in turn. The drill bit shall remain in the drilling state in the hole and shall not be allowed to idle in the hole. During the whole drilling process, the drilling speed should be kept low and constant.

Be careful when drilling through the hole. When the hole is about to be drilled through, in order to clean the drill bit and drill hole and remove the cuttings, it is best to return the drill bit. When the hole is finally broken, a strong feed is used, so that a smooth hole can be obtained.

Use enough coolant to take away the drilling cuttings, otherwise the drilling cuttings should be removed regularly.