In many CNC machine tools, because the speed change system of the spindle still uses several transmission shafts, gears and bearings, it is inevitable to produce vibration noise, friction noise and impact noise in the work. Deep hole cutter is suitable for boring and rolling of machine tool manufacturing, locomotive, ship, coal machine, hydraulic, power machinery, pneumatic machinery and other industries, making the workpiece roughness reach 0.4-0.8 μ M.
The guiding system of deep hole honing machine. Before drilling into the workpiece, the deep hole drill is guided by the cutter to ensure the accurate position of the cutter head, and the guide sleeve is close to the end face of the workpiece. The guide rail of deep hole cutter bed adopts double rectangular guide rail suitable for deep hole machining machine tool, which has large bearing capacity and good guiding accuracy; the guide rail has been quenched and has high wear resistance. The speed change of the main drive system of CNC machine tool is controlled by the computer when the machine tool does not stop working, so it is more continuous and representative than the noise produced by ordinary machine tool. The mechanical system is subject to any external excitation force, and the system will vibrate because of the response to the excitation force. The vibration energy propagates in the whole system. When it propagates to the radiation surface, the energy is converted into pressure wave, which is transmitted through the air again, that is, acoustic radiation. Therefore, the three steps of excitation response, system internal transmission and acoustic radiation are the formation process of vibration noise, friction noise and impact noise. Let's let the relevant personnel of the deep hole bit manufacturer explain it to us:
1. The main transmission system of CNC machine tools mainly relies on gears to complete speed change and transmission. Therefore, the meshing transmission of gears is one of the main noise sources.
2. The assembly, preload, concentricity, lubrication condition of bearing, journal and supporting hole have great influence on noise. Moreover, the manufacturing deviation of the bearing itself determines the noise of the bearing to a great extent.