This article delves into the structure principle and key technical performance of the high - torque electric spindle, the core component of the five - axis last CNC milling machine DC6070 launched by Ningbo Kaibo CNC Machinery Co., Ltd. The high - torque electric spindle, through its unique design and powerful power output, effectively enhances the stability and precision in last machining, meeting the requirements of cutting high - hardness materials and complex curved surfaces.
The high - torque electric spindle consists of several key parts, including the motor, bearing system, and cooling mechanism. The motor is the power source, which provides a continuous and stable power output. The bearing system ensures the high - speed and stable rotation of the spindle. The cooling mechanism is responsible for dissipating the heat generated during operation to maintain the normal working temperature.
When comparing direct - drive and belt - driven electric spindles, significant performance differences are found. Direct - drive electric spindles have higher transmission efficiency, usually reaching over 90%, which can directly transmit the motor power to the spindle without intermediate transmission losses. In contrast, belt - driven electric spindles have lower transmission efficiency, around 80 - 85%, and may experience belt slippage during high - speed operation, affecting machining accuracy.
In terms of stability, high - torque electric spindles can maintain a stable rotation speed during operation, with a speed fluctuation of less than ±0.1%. This high stability is crucial for achieving high - precision machining. Their excellent anti - load capacity allows them to handle heavy cutting tasks without significant performance degradation. For example, during high - hardness material cutting, they can still maintain high - speed and efficient operation.
In heat management, the high - torque electric spindle is equipped with an advanced cooling system, which can effectively control the temperature rise within 10 - 15°C under continuous operation. This helps to ensure the dimensional accuracy of the machining parts and extends the service life of the spindle. Based on customer feedback, spindles with good heat management can have a service life extended by 2 - 3 years compared to ordinary spindles.
In last manufacturing, where there are special requirements for arc carving and deep - slot milling, high - torque electric spindles play an irreplaceable role. For arc carving, the high - precision control ability of the spindle can ensure smooth and accurate arc shapes, with a contour error of less than 0.05mm. In deep - slot milling, the high - power and high - torque characteristics of the spindle enable it to quickly remove materials, improving production efficiency by 30 - 50% compared to traditional spindles.
A shoe mold manufacturing company had been facing problems with low - precision arc carving and long - time deep - slot milling before using the high - torque electric spindle of Ningbo Kaibo. After replacing with this spindle, their product quality and production efficiency were significantly improved, winning them more market shares.
For parameter setting, the spindle speed should be adjusted according to different materials and machining requirements. Generally, for high - hardness materials, the spindle speed can be set at 8000 - 12000 rpm, while for soft materials, it can be increased to 15000 - 20000 rpm. In terms of fault troubleshooting, if abnormal vibration or noise occurs, it may be due to bearing wear or misalignment. Regular inspection and replacement of worn parts can prevent major malfunctions.
To optimize the spindle performance, regular lubrication of the bearings and cleaning of the cooling system are necessary. By strictly following these maintenance procedures, the spindle can maintain its peak performance for a long time.
Interested in learning more about the high - torque electric spindle and how it can revolutionize your last CNC milling process? Download our technical manual or schedule an online consultation now!
