Process Characteristics Of Deep Hole Machining

1. The tool holder is limited by the aperture, with small diameter and large length, resulting in poor rigidity and low strength. It is easy to produce vibration, ripple, and taper during cutting, which will affect the straightness and surface roughness of the deep hole.

2. When drilling and reaming, it is difficult for the cooling lubricant to be input to the cutting area without special devices, which reduces the tool durability and makes chip removal difficult.

3. In the process of deep hole processing, you cannot directly observe the cutting condition of the tool. You can only judge by working experience by listening to the sound during cutting, watching chips, hand vibration and workpiece temperature, and viewing instruments (oil pressure gauge and electric meter). Whether the cutting process is normal.

4. It is difficult to remove the chips. Reliable means must be used to break the chips and control the length and shape of the chips to facilitate smooth removal and prevent chip clogging.

5. In order to ensure the smooth progress of the deep hole in the machining process and achieve the required machining quality, an internal (or external) chip removal device, a tool guide and support device, and a high-pressure cooling and lubricating device should be added to the tool.

6. Poor heat dissipation conditions of the tool and the increase in cutting temperature will reduce the durability of the tool.