Analysis and detection of elastic deformation of the large-scale crankshaft in non-circular grinding

作者：Shen Nan Yan; Li Jing; Wang Xue Dong; Ye Jun; Yu Zhi Xiang

来源：2013 3rd International Conference on Mechatronics and Applied Mechanics, ICMAM 2013, 2013-12-27 To 2013-12-28.

DOI：10.4028/www.scientific.net/AMM.532.285

• Calculation models
• Clamping Force
• Crankshaft deformation
• Finite element simulations
• Machining Accuracy
• Measurement methods
• On machine measurement
• Ratio of length to diameters

Due to the discontinuous axis and the big ratio of length to diameter, the large-scale crankshaft is easy to generate the complex elastic deformation under the effect of the huge gravity and the clamping force on non-circular grinding machine. The distinctive deformation deteriorates the coaxiality of all the main journals and thus the grinding precision of crankpins in non-circular grinding. In this paper, the statics analysis of large-scale crankshaft has been conducted by using the finite element simulation. The overall deformation of crankshaft and the position offset of each main journal center without or with the auxiliary supports have been simulated and contrasted. The results manifest that the auxiliary support forces produced by the steady rests have the positive effect on the compensation for crankshaft deformation. On this basis, to satisfy the demand of position adjustment of the upper and lower support pads of servo-controlled open steady rest, the on-machine measurement method and device of the position of main journal center is proposed. And then the offset calculation model of the main journal center is deduced using the measured data. The measurement method and device are beneficial for the straightening of the crankshaft and the improvement of machining accuracy of crankpins in non-circular grinding.

• 出版日期2014
• 单位上海大学