High-efficiency crankshaft machining tools are powerful, but they also come with certain limitations. To fully leverage the high-efficiency capabilities of these machines, it's essential to choose the right tool for each specific application. This ensures that the machining process is not only faster but also more accurate and reliable.
1. When a crankshaft has an undercut groove on its journal, traditional CNC internal milling machines may not be suitable. In such cases, neither the high-speed external milling machine nor the internal milling machine can effectively handle the task. However, a CNC car-car pull machine is better suited for this kind of operation, as it can easily manage the complex geometry involved.
2. If the balance block’s side requires machining, the CNC internal milling machine becomes the preferred choice. The internal cutter is positioned outside the crankshaft, offering better rigidity, which makes it ideal for large forged steel crankshafts. On the Other hand, using a CNC car-car pull machine for this purpose can lead to serious chipping issues due to interrupted cutting at high speeds, especially when working on the balance block’s side.
3. When there are no undercut grooves on the journals and no machining is required on the balance block’s sides, multiple machine tools can be used. For car crankshafts, the main journal is best machined using a CNC car-car pull machine, while the connecting rod journal is more efficiently handled by a high-speed external milling machine. For large forged steel crankshafts, both the main and connecting rod journals are typically processed using a CNC internal milling machine, which offers greater stability and efficiency.
Crankshafts are generally divided into two main types: large forged steel crankshafts and lightweight car crankshafts. Forged steel crankshafts usually have larger margins and require machining on the balance block’s sides, without undercut grooves. In contrast, car crankshafts often feature undercut grooves and do not require side machining. Based on these differences, it's clear that for forged steel crankshafts, the CNC internal milling machine is the most effective choice. For car crankshafts, the main journal is best machined using a CNC car-car pull machine, while the connecting rod journal benefits from a high-speed external milling machine. This combination provides a balanced and efficient machining approach.
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