Abstract
This article presents an efficient tool path generation method for five-axis machining of a difficult machined centrifugal impeller. Geometry of centrifugal impeller is analyzed, and the inherent low efficiency of the machining of difficult machined centrifugal impeller is obtained. The tool path curves which are calculated by the most common iso-parametric method are shown to testify the waste in machining. The new type machining layers are calculated, and the new machining regions are achieved. The new tool path curves in each new machining region are calculated, and they are sparser and triangular. For the inherent low machining efficiency of difficult machined centrifugal impeller, the machining time can be greatly reduced just by the optimizing tool path generation method in this article. Numerical simulation and a real test impeller are presented as the test of the proposed method.
Highlights
Centrifugal impellers are the very important components in petrochemical engineering, ships, aircraft industry, and so on
Through the change of the machining layers and regions, a lot of machining time and cost are saved, facing the tool path curves which are too dense to generate a lot of waste in machining time as shown in Figure 4(b) near leading edge of blades and split blades; the similar research approach can be applied widely
To sum up, using the efficient tool path generation for five-axis machining of a difficult machined centrifugal impeller above, 60% of the length of tool path curves is saved
Summary
Centrifugal impellers are the very important components in petrochemical engineering, ships, aircraft industry, and so on. Keywords Tool path generation, titanium alloy, centrifugal impeller, ruled surface, machining layer Focusing on the tool path generation for five-axis finish machining of titanium alloy centrifugal impeller, calculating the new machining layers and new tool path curves, reducing the length of the whole tool path curves, and proposing a novel and efficient tool path generation method are very urgent.
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