Research On Error Analysis, Modeling And Compensation For Large Rotary Parts Machine

The machine tools (NO.GJ463-SM) designed by Jiangsu high-precisionelectromechanical equipment Co., Ltd., is used to process and repair for large rotator partsmachining, Because of its lack of effective error measurement and compensation devices,there is a problem that the machining accuracy is not high. While large rotary parts are thecore components of major technical equipment, such as nuclear power, petrochemical andhydropower, so it has a high quality requirement. Therefore, this project dedicated to theresearch of large rotator machine error measurement and compensation method, so as toimprove the machining accuracy and aim to meet customer needs.In this paper, The machine tools designed by Jiangsu high-precisionelectromechanical equipment Co., Ltd, is the object for study, after the analysis of itsstructural characteristics and processing methods, it is sure that the rotary motion error ofrotary parts is the main factor affecting the processing accuracy, the sources of rotarymotion error and online measurement principles were analyzed and summarized. Studiesof error modeling and measurement methods of large rotating parts processing machine,the positional relationship of the roller and the rotary part is detailed analyzed. Presentedthe measurement method of rotary part surface contour error in the roller support, andestablished rotary motion error model of the parts in the roller support. According to theonline measurement principle of axis rotary motion error, calculation formula of rotarymotion error at arbitrary machining point is got. Analyzed control mode andimplementation strategies of various existing error compensation, comparing theadvantages and disadvantages of different control strategies and execution, on this basis,design and workflow of error compensation control system about GJ463-SM machine isproposed.Finally create entity model of large rotary part and idler, kinematics simulation isdone by Adams. Comparison of the data curves obtained by measurement and the real datacurve, validate the proposed rotary motion error model as well as the effectiveness ofmeasurement and compensation method of rotary part surface contour error.