Crankshaft high-efficiency special machine tools also have its processing limitations. Only by properly applying suitable machining tools can the high-efficiency speciality of the crankshaft machining machine be realized, thereby improving the processing efficiency of the process.
1. When the crankshaft journal has an undercutting groove, the CNC internal milling machine cannot be machined; if the crankshaft journal has an undercutting groove, the CNC high-speed external milling machine and the CNC internal milling machine cannot be processed, but the CNC car-car The drawing machine can be easily processed.
2. When the side of the balance block needs to be machined, the CNC internal milling machine should be the preferred machine tool, because the inner milling cutter is positioned outside the circle and has good rigidity, especially suitable for machining large forged steel crankshafts; at this time, it is not suitable for CNC car-car pull The machine tool, because it needs to be machined on the side of the balance block of the crankshaft, is machined by CNC car-car pulling machine, the side of the balance block is interrupted cutting, and the crankshaft speed is very high. Under this condition, the phenomenon of chipping is compared. serious.
3. When the journal of the crankshaft has no undercutting groove and the side of the balance block does not need to be machined, in principle, several machine tools can be processed. When machining the car crankshaft, the spindle neck adopts the CNC car-car pull machine tool, and the connecting rod neck adopts the numerical control high-speed outer milling machine tool, which should be the best efficient machining option; when processing the large forged steel crankshaft, the main journal and the connecting rod neck are both It is more reasonable to use CNC internal milling machine.
The crankshaft can be divided into a large forged steel crankshaft and a lightweight car crankshaft. The forged steel crankshaft journal generally has no undercutting grooves, and the side needs to be processed, and the margin is large; the car crankshaft generally has a sunken slot, and No machining is required on the side. Therefore, it can be concluded that the machined forged steel crankshaft adopts the numerical control internal milling machine tool, the machining of the crankshaft main neck of the car adopts the numerical control vehicle-car pulling machine tool, and the connecting rod neck adopts the numerical control high-speed outer milling machine tool, which is a reasonable and efficient processing option.
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