High speed cutting (HSM) refers to the cutting process at a much higher speed than the conventional cutting speed. At present, there is no uniform definition of the speed range of high-speed cutting in various countries. Generally, cutting that is 5~10 times higher than the conventional cutting speed is called high-speed cutting. One of the main goals of high speed cutting is to reduce production costs through high productivity. It is mainly used in the finishing process, often for processing hardened die steel. Another goal is to improve overall competitiveness by reducing production time and delivery time.
High speed cutting technology is a very large and complex system engineering. What are its advantages over traditional machining? For machine tools, how can high-speed cutting be met?
After the concept of high speed machining was put forward, it was widely used in industrial production in the near future after long-term exploration, research and development. High-speed cutting system is mainly composed of high-speed cutting cnc machine tools, high-performance tool clamping system, high-speed cutting tools, high-speed cutting cam system software and other parts. The reason why high-speed cutting is more and more widely used in industry is that it has significant advantages over traditional machining:
What kind of machine tool can satisfy high-speed cutting?
1. Short processing time and high efficiency.
2. The cutting condition of the tool is good, the cutting force is small, and the force on the spindle bearing, the tool and the workpiece is small.
3. The tool and workpiece are less affected by heat.
4. The surface quality of the workpiece is good.
5. High speed cutting tools have good thermal hardness.
6. It can finish the processing of high hardness materials and hrc40-62 hardened steel.
In general, what kind of machine tool can meet the requirements of high-speed cutting can be divided into the following requirements:
1. The mechanism is designed for high-speed operation
High speed machine tool requires its mechanism to be highly rigid, capable of absorbing high frequency vibration and high inertia G value to ensure high speed cutting precision and stability.
2. Excellent CNC control system
CNC numerical control system is the unit that sends the position command. The command is required to be transmitted accurately and quickly. After processing, it sends the position command to each coordinate axis. The servo system must quickly drive the tool or workbench to move accurately according to the command. It requires to be able to process program segments quickly and control the machining error to the minimum. In the field of high-speed processing applications, Siemens 840D and Fanuc18iMB are the most representative.
3. Tool handle and tool suitable for high-speed operation
Tools for high-speed cutting, especially high-speed rotary tools, require better quality and performance of tools and tool handles in terms of ensuring machining accuracy and operating safety.
4. Specialized CAD/CAM software
Professional CAD/CAM software requires a precise path calculation method, which can not only accurately meet the accuracy requirements of 3DProfile, but also reduce the discharge process, and even meet the surface quality requirements without polishing. It must be able to produce a good cutting path, make the cutting amount stable, not only improve the machining efficiency, but also extend the tool life and save the tool cost.
