In recent years, miniaturization of components has become a trend. In many areas of technology (such as aerospace, automotive, electronics, mobile communications, medical, optical and mechanical manufacturing technology) to apply more and more micro-mechanical products. This component miniaturization of processing technology put forward higher requirements for the production of these small size, high precision machined parts and tooling to make the processing industry is facing new problems. Because a very small tool for processing and use of micro-tool machining large size there are substantial differences.
To reduce manufacturing costs, large quantities of micro-components is used to manufacture the mold. At present, this small Mold Making machining is a strong growth area. As the mold of Precision Plastic Mold and high surface quality requirements, and mold manufacturing is one-piece or small batch products. Flexible and economical to produce, which makes micro-milling process is placed in a particularly important role. Micro-milling and laser machining with EDM process compared with many advantages:
1, can be hardened tool steel;
2, flexible manufacturing complex geometric surfaces;
3, can use existing CAD / CAM system;
4, get a good surface quality;
5, relatively low investment in equipment.
Therefore, the micro-mold manufacturing, the use of micro-milling process can use NC-5 axis (or 3-axis) or high-speed machining center flexibility and precision micro-milling machine to manufacture a variety of modes to the core.
High spindle speed
Using small diameter tools for micro-milling, the workpiece material to the decision reached by the cutting speed will need a high spindle speed. For example, the milling cutter with a diameter of 0.5mm steel, was elected with 180m/min cutting speed, you need to 115000r/min spindle speed. The smaller the tool diameter, the higher the spindle speed is needed.
At present, widely used in Mold Making ordinary machining center, the spindle speed mostly in the 18000 ~ 42000 (r / min), suitable for use 2mm ~ 12mm diameter end mills for processing. The micro-milling Plastic Mould Making tool used in smaller diameter (0.1mm ~ 2mm), as cutting speed depends on workpiece material, and if in such a conventional machine tools for micro-machining, obviously can not get better cutting process.
To meet the rapid development of micro-milling, the development of new higher speed spindle motor with special significance. A few years ago, some of the power plant has produced 160000r/min spindle speed spindle components. A number of spindle assembly plant and the Fraunhofer Institute for Production Technology team of the last few years has begun to develop speed 300000r/min supported by air bearings and synchronous motor-driven spindle. Currently, Precise Precision spindle components introduced specifically for micro-machining of high-speed spindle. From the spindle can be seen from the air bearing supporting the spindle, can achieve very high speed. In addition, the air bearing has the advantage of smooth, round run-out error can be achieved <1 μm, this bearing also less prone to wear, therefore, have a longer life. As the micro-milling cutting force itself small, so that bearings are particularly suitable for fine cutting.
High-speed spindle drive more and more parts of the synchronous motor is a trend. Important advantage of this motor have a greater torque or power density, and the resulting temperature rise is lower, it is essential to avoid the heat spindle elongation is beneficial.
Air bearing spindle with synchronous motor in combination on the view of a smooth operation, long life and good thermal characteristics, etc., which are micro-machining is undoubtedly one of the best of the spindle system.
To reduce manufacturing costs, large quantities of micro-components is used to manufacture the mold. At present, this small Mold Making machining is a strong growth area. As the mold of Precision Plastic Mold and high surface quality requirements, and mold manufacturing is one-piece or small batch products. Flexible and economical to produce, which makes micro-milling process is placed in a particularly important role. Micro-milling and laser machining with EDM process compared with many advantages:
1, can be hardened tool steel;
2, flexible manufacturing complex geometric surfaces;
3, can use existing CAD / CAM system;
4, get a good surface quality;
5, relatively low investment in equipment.
Therefore, the micro-mold manufacturing, the use of micro-milling process can use NC-5 axis (or 3-axis) or high-speed machining center flexibility and precision micro-milling machine to manufacture a variety of modes to the core.
High spindle speed
Using small diameter tools for micro-milling, the workpiece material to the decision reached by the cutting speed will need a high spindle speed. For example, the milling cutter with a diameter of 0.5mm steel, was elected with 180m/min cutting speed, you need to 115000r/min spindle speed. The smaller the tool diameter, the higher the spindle speed is needed.
At present, widely used in Mold Making ordinary machining center, the spindle speed mostly in the 18000 ~ 42000 (r / min), suitable for use 2mm ~ 12mm diameter end mills for processing. The micro-milling Plastic Mould Making tool used in smaller diameter (0.1mm ~ 2mm), as cutting speed depends on workpiece material, and if in such a conventional machine tools for micro-machining, obviously can not get better cutting process.
To meet the rapid development of micro-milling, the development of new higher speed spindle motor with special significance. A few years ago, some of the power plant has produced 160000r/min spindle speed spindle components. A number of spindle assembly plant and the Fraunhofer Institute for Production Technology team of the last few years has begun to develop speed 300000r/min supported by air bearings and synchronous motor-driven spindle. Currently, Precise Precision spindle components introduced specifically for micro-machining of high-speed spindle. From the spindle can be seen from the air bearing supporting the spindle, can achieve very high speed. In addition, the air bearing has the advantage of smooth, round run-out error can be achieved <1 μm, this bearing also less prone to wear, therefore, have a longer life. As the micro-milling cutting force itself small, so that bearings are particularly suitable for fine cutting.
High-speed spindle drive more and more parts of the synchronous motor is a trend. Important advantage of this motor have a greater torque or power density, and the resulting temperature rise is lower, it is essential to avoid the heat spindle elongation is beneficial.
Air bearing spindle with synchronous motor in combination on the view of a smooth operation, long life and good thermal characteristics, etc., which are micro-machining is undoubtedly one of the best of the spindle system.
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