Application of POWERMILL in NC programming of aeroengine integral impeller (3


10 finishing blades

Blade finishing can be done in SWARF or curved projection. In this case, the SWARF processing method is convenient because of the fact that the blade is composed of a ruled surface.

After completing all the procedures, you can do a machine simulation first, check whether the programmed program has been over-cut and collided, and prevent all accidents that may occur before the machining, to ensure the safety of personnel and equipment, and then Make NC program output.

Difficult analysis and solution

1 Making thin-walled parts

Since the mouth|sheet is very thin, the layer-by-layer cutting method is used as much as possible in the semi-finishing and finishing, and even the tip position can be processed first to ensure sufficient strength of the blade during processing, and then the blade is processed. If there is enough space between two adjacent blades, the stepped margin can be considered during the machining process. For example, the blade is divided into 3 segments, the upper segment is left with O.5mm margin, the middle segment is left with 1mm margin, and the lower segment is left at 1.5. Mm margin, this can ensure that the bottom of the blade is always full of strength support, although this will greatly increase the programming complexity and programming time, but can improve the quality of processing.

2 root processing safety issues

PowerMILL uses the curve of the tool axis to ensure that the tool path is along the root of the blade. It can provide over-cut inspection of parts, collision inspection of tool holders, and machining simulation and collision inspection of machine tools to ensure the safety of the machining process.

The development trend of CNC machining

With the continuous development of CNC machining technology, five-axis and high-speed machining will become the mainstream. Nowadays, more and more manufacturers use five-axis machine tools for product processing, which can improve processing efficiency and shorten production time. On the other hand, it can improve the processing quality of the blade and reduce the workload of the fitter. The high-speed five-axis machine tool can play the role of the official, the choice of CAM software is very important. Among the many CAM processing software available in the field of five-axis and high-speed mirror processing, PowerMILL is undoubtedly a more professional product.

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