在加工过程中，外载荷和夹具是造成加工表面误差的主要原因。为了研究夹紧预紧力和加工力对加工工件表面误差的影响，建立了整个夹具-工件系统的集成模型。还分析了夹具柔度、工件及其定位器/夹具接触相互作用和强迫振动对加工表面误差的影响。以V型发动机缸体的工作面为例，进行夹具夹紧和面铣操作。将模拟结果与实验数据进行了比较，两者吻合较好。

The machined surface error is strongly contributed by the external loads and fixturing during machining processes. An integrated model of the entire fixture-workpiece system is developed to investigate the influence of clamping preloads and machining forces on the surface error for machined workpiece. The effects of fixture compliance, workpiece and its locators/clamps contact interaction, and forced vibration, on the machined surface error are also analyzed. The deck face of a V-type engine block subjected to fixture clamping and face milling operation is given as an example. Comparison between the simulation result and experimental data shows a reasonable agreement.