Rough milling of large and heavy workpieces is a critical process in the manufacturing industry. It requires high - precision techniques to ensure both efficiency and quality. This article delves into the key technologies, offering practical solutions for technicians to overcome challenges.
The optimization of cutting parameters is fundamental to large - scale rough milling. For example, in a case of machining steel workpieces, by adjusting the cutting speed from 100 m/min to 150 m/min, and the feed rate from 0.2 mm/tooth to 0.3 mm/tooth, the machining efficiency was increased by nearly 30%. The key lies in finding the balance between the cutting speed, feed rate, and cutting depth according to the characteristics of different materials.
Selecting the right tools is crucial for successful rough milling. For graphite materials, tools with high sharpness are preferred to avoid chipping. In contrast, when machining aluminum alloys, tools with good heat - resistance are necessary. Regular maintenance of tools, such as timely re - sharpening and proper storage, can extend their service life by up to 50%, thus reducing production costs.
A well - planned processing path can significantly improve machining accuracy and efficiency. Through simulation and actual tests, we found that adopt a zig - zag path reduced the machining time by about 20% compared to a simple linear path for large - area rough milling. This method can also effectively reduce the vibration during the machining process.
Vibration and thermal deformation are two major factors affecting the precision of large and heavy workpiece processing. Vibration can lead to surface roughness and tool wear, while thermal deformation can cause dimensional errors. To control vibration, damping devices can be installed, which can reduce vibration amplitude by up to 70%. For thermal deformation management, cooling systems with proper coolant flow rates can be used, effectively reducing the temperature rise during processing and ensuring dimensional accuracy.
Ningbo Kaibo CNC Machinery Co., Ltd.'s FH1890L vertical machining center is a powerful tool for large - scale rough milling. With a high - speed spindle that can reach up to 12000 rpm, it provides high - cutting - rate performance. In practical production, this machining center has improved processing efficiency by at least 40% and enhanced processing accuracy to within ±0.01 mm for many users.
This advanced equipment is suitable for various materials, including graphite, aluminum alloy, and steel. It integrates advanced technologies in cutting parameter optimization, vibration control, and thermal deformation management, providing users with a comprehensive solution for high - quality machining.
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