中文摘要：

针对复合制造工艺背景下叶片毛坯形状复杂、余量分布不均的特点，提出基于加工中心在线检测的叶片装夹定位与余量优化方法。首先，根据叶片毛坯的工艺特性，建立了加工余量自适应优化的统一数学模型。然后，讨论了三类典型叶片包括无余量叶片、带余量叶片以及变形叶片组的定位与余量优化问题，并依次给出了适应不同约束条件的定位优化求解算法。最后，结合加工中心的在线检测方式，提出了叶片加工余量自适应优化的自动定位流程。算例分析结果表明，文中所提方法能够有效控制各种不同加工工艺制造的叶片毛坯的余量分布，使其自适应变化以满足实际工艺要求。

英文摘要：

Aiming at the complex shape and uneven distribution allowance of blade blank under the background of composite manufactur-ing process,an approach to workpiece localization and allowance balancing based on online measurement is proposed. Firstly,according to the technological characteristics of blade blank,an unified mathematical model for machining allowance balancing is constructed. Then, the localization and allowance balancing problems of single blade with no allowance,with allowance and distortion blade groups are dis-cussed and the corresponding solutions of localization transformation are also provided. Finally,with the online measurement of machining center,the implementation process for workpiece localization and allowance balancing of blade are given. Examples results show that the allowance distribution of different blade blank can be controlled effectively,which can satisfy the actual process requirement adaptively.