准噶尔盆地彩南油田油源研究

通过对准噶尔盆地白家海凸起及其邻区原油与烃源岩饱和烃地球化学特征的研究,取得了彩南原油及烃源岩有机质在生源构成、成烃环境、演化程度和原油运移模式四个方面的认识,指出白家海凸起和阜康凹陷中、下侏罗统尤其是三工河组泥质岩系是彩南油藏的主力烃源岩,为今后进一步勘探提供了科学依据.     

Determination of Cutting-Condition-Independent Coefficients and Runout Parameters in Ball-End Milling

This paper presents a systematic and practical method for determining cutting-condition-independent coefficients in ball-end milling. An approach for estimating the runout offset and its location angle is also described based on a single cutting force measurement. An in-depth analysis of the characteristics of these cutting coefficients, which can be determined from only a few test cuts, is provided. The size effect is also modelled, including the characteristics of the ball-end mill geometry, and incorporated into the cutting force model. This method of estimating the 3D ball-end milling force coefficients was tested experimentally for various cutting conditions and gave excellent cutting force predictions. Also, the estimated values of the runout offset agreed well with the measurements.