Figure 1 Double-cutter car-car pull machine
2. CNC high speed outer milling machine
The CNC high-speed external milling technology developed in the mid-1990s has a higher efficiency than CNC turning, CNC internal milling and car-pull. Taking the four-cranked crankshaft as an example: the CNC car-car pull process requires two processes for the connecting rod journal, and the CNC high-speed external milling can be completed by one process (application of workpiece rotation and milling cutter feed servo linkage control technology, One-time clamping does not change the crankshaft rotation center and follow-up tracking of the crankshaft of the crankshaft. It has the following advantages: high cutting speed (up to 350m/min), short cutting time, short cycle time and low cutting force The workpiece temperature rise is low, the tool life is high, the number of tool changes is small, the machining accuracy is higher, and the flexibility is better. Therefore, CNC high-speed external milling will be the development direction of crankshaft main journal and connecting rod journal roughing. Figure 2 shows a double-cutter high-speed external milling machine.
Figure 2 Double cutter high speed milling
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