This is the best deep hole machining

The so-called deep hole machining is a hole with a ratio of the length of the hole to the diameter of the hole greater than 6. In deep hole machining, in most cases, the depth-to-diameter ratio of deep holes is L/d ≥ 100. Such as cylinder holes, axial oil holes of shafts, hollow spindle holes and hydraulic valve holes, etc. Some of these holes require high machining accuracy and surface quality, and some of the processed materials have poor machinability, which often become a major problem in production.

Generally, the depth-diameter ratio L/d is greater than or equal to 100 for deep holes in most cases. Such as cylinder holes, axial oil holes of shafts, rocket bodies and barrels of various artillery pieces, etc. Some of these holes require high machining accuracy and surface quality, and some of the processed materials have poor machinability, which often become a major problem in production. Therefore, deep hole processing has been valued by many people, and more and more people have entered the deep hole processing industry.
Process characteristics
1. The cutter bar is limited by the aperture, the diameter is small, and the length is large, resulting in poor rigidity and low strength. It is easy to generate vibration, ripple and taper during cutting, which affects the straightness and surface roughness of the deep hole.

2. When drilling and reaming, it is difficult to input the cooling lubricant into the cutting area without using special devices, which reduces the durability of the tool and makes chip removal difficult.
3. In the process of deep hole processing, it is not possible to directly observe the cutting conditions of the tool, but to judge by listening to the sound of cutting, watching chips, hand vibration and workpiece temperature, and observing instruments (oil pressure gauge and electric meter) based on work experience. Whether the cutting process is normal.
4. It is difficult to remove chips. Reliable means must be used to break chips and control the length and shape of chips, so as to facilitate smooth removal and prevent chips from clogging.
5. In order to ensure the smooth progress of the deep hole and the required processing quality during the machining process, the inner (or outer) chip removal device, the tool guiding and supporting device and the high-pressure cooling and lubrication device should be added.
6. The tool has poor heat dissipation conditions, and the cutting temperature increases, which reduces the durability of the tool.

Industry overview

Deep hole machining has a wide range of applications in the mold industry, solving the fine holes and long holes that cannot be solved by ordinary drilling machines in mold processing. Effectively reduce the processing cost of the mold. To undertake the most precise deep hole processing, the diameter of 3-35 can reach 2600 in length. It solves the water hole, oil hole, air hole, single inclined hole, double inclined hole, screw through hole, thimble hole, etc. in the mold to the greatest extent.