Development of Derived CNC System for Ship Engine Piston Turning

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Abstract:

Based on the principle of derived CNC, a NC lathe system is redesigned for cutting ship engine pistons which have a non-circular middle-convex and varying oval (NMVO) profile in the skirt. With an attached high-speed linear motor servo unit, a new derived CNC lathe system based on a normal NC lathe system is developed to machine non-circular section. Using this method, the development cost is reduced. A moving magnet voice coil motor is designed as the actuator to provide sufficient stroke and driving force for the cutting. The controller of the derived unit is designed based on digital signal processor (DSP) TMS320F28335, and a method of pre-interpolating data on main computer is employed in the software development. By doing this, the real-time performance of the system is satisfied.

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1076-1079

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July 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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