Machining Accuracy Improvement by Compensation of Machine and Workpiece Deformation

For workpieces of regular shape, recently achieved machining accuracy is satisfactory, but for workpieces of complex shape and thin walls form light alloy machining (e.g. helicopters gearbox cases, automotive parts etc.) it is still difficult to find proper environmental conditions without separating the machine form from its ambient temperature impact. A procedure for adjustment and self-testing has been proposed, prepared and successfully verified on existing flexible machining systems. An approach to improve the machining accuracy with high accuracy machining systems by use of special adjustment procedures and additional workpiece distortion compensations are presented in the paper.