CAJ | 학술논문

清根加工质量严重地影响着组合曲面体零件的工作性能。为提高清根加工刀心轨迹的精度和自动化处理程度，在点搜索的基础上提出了初始点自适应调整和多搜索中心分区域搜索优化算法。以航空发动机叶片缘板与叶型过渡区域清根加工为研究对象，在参数域内分析了点搜索算法。在此基础上，以寻找临界不确定点为引导方向对初始搜索点进行自动调整并优化搜索区域。又针对搜索到的控制点分布不均问题，提出多搜索中心分区域搜索方法，得到可控且分布均匀的刀心轨迹控制点。将控制点拟合得到的样条曲线向缘板偏置面投影作为刀心轨迹线，并对其进行了误差分析。以叶片叶型与安装缘板和阻尼台两处过渡区域的清根加工为例，对算法的有效性进行了仿真验证，证实所提方法的正确性和有效性。
청근가공질량엄중지영향착조합곡면체령건적공작성능。위제고청근가공도심궤적적정도화자동화처리정도，재점수색적기출상제출료초시점자괄응조정화다수색중심분구역수색우화산법。이항공발동궤협편연판여협형과도구역청근가공위연구대상，재삼수역내분석료점수색산법。재차기출상，이심조림계불학정점위인도방향대초시수색점진행자동조정병우화수색구역。우침대수색도적공제점분포불균문제，제출다수색중심분구역수색방법，득도가공차분포균균적도심궤적공제점。장공제점의합득도적양조곡선향연판편치면투영작위도심궤적선，병대기진행료오차분석。이협편협형여안장연판화조니태량처과도구역적청근가공위례，대산법적유효성진행료방진험증，증실소제방법적정학성화유효성。
Machining quality of clean-up regions has a strong influence on the performances of combinatorial-surface models. To improve the accuracy of tool centre path and the level of automatic processing, the adaptive adjustment of initial points and the optimization method of searching are put forward based on point-searching method. Taking the clean-up machining of the transition area between the aircraft engine blade platform and blade form as the research object, the point search method is studied in parameter field. According to the theory mentioned above, it adjusts the initial points automatically in directions of critical searching points,and optimizes the searching area. However, the distribution of searching points is irregular. To solve it, it proposes separating searching method with multiple searching points. Then, the control points, which generate the path of tool center, are controlled and homogeneous distributed. A spline is generated by fitting the control points. It takes the projection of the spline on the offset surface of blade platform as the path of tool center and analyzes its accuracy. To confirm the correctness and effectiveness of the proposed method, another example of computer implementation clean-up machining of the transition area between the blade form and damper platform is given.