This article delves deeply into the structure principle and working mechanism of the high-torque electric spindle, the core component of the five-axis last CNC milling machine DC6070 produced by Ningbo Kaibo CNC Machinery Co., Ltd. It focuses on how this electric spindle enhances the precision and efficiency of shoe mold processing through high-efficiency power output, and solves the technical problems of traditional milling machines in complex curved surface processing and high-hardness material cutting.
The high-torque electric spindle mainly consists of a motor, a spindle unit, and a cooling system. There are two main types: direct-drive and belt-driven. The direct-drive type has a simple structure, which can reduce energy loss and improve transmission efficiency. It can achieve a transmission efficiency of up to 95%. In contrast, the belt-driven type offers more flexible speed adjustment and can better adapt to different processing requirements. 
In terms of stability, the high-torque electric spindle can maintain a stable rotation speed during high-speed operation, with a speed fluctuation of less than ±0.1%. Its excellent anti-load capacity allows it to withstand a maximum radial load of 5000N, ensuring smooth processing even when dealing with high-hardness materials. In addition, advanced thermal management technology effectively controls the temperature rise during operation. The temperature rise is controlled within 15°C, which greatly reduces the impact of thermal deformation on processing accuracy. 
In the last manufacturing process, especially in complex arc carving and deep groove milling, the high-torque electric spindle plays a crucial role. The high torque output enables it to accurately carve complex arc shapes, and the high precision ensures the smoothness of the carved surface. In deep groove milling, it can maintain high efficiency and stability, improving the overall processing quality and efficiency. For example, compared with traditional spindles, the processing time for complex last models can be reduced by 30%.
Proper maintenance and debugging are essential for the long - term stable operation of the high-torque electric spindle. When setting parameters, it is necessary to adjust according to the specific processing requirements. For example, the spindle speed can be set between 5000 - 20000 rpm. Regularly check the cooling system to ensure that the coolant flow rate is between 20 - 30L/min. In case of faults, a systematic troubleshooting process should be carried out. Common faults include abnormal noise and vibration. By checking components such as bearings and motors, most faults can be effectively resolved. 
In the global market, many shoe mold manufacturers have benefited from using the high-torque electric spindle of Ningbo Kaibo CNC Machinery Co., Ltd. For example, a manufacturer in Italy reduced production costs by 20% and increased product qualification rates by 15% after using this product. Another company in the United States improved production efficiency by 40% through the excellent performance of this electric spindle, and thus gained a greater market share.
