Analysis–synthesis of dimensional deviation of the machining feature for discrete-part manufacturing processes |
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Authors: | Xiao-Jin Wan Cai-Hua Xiong Xu-Feng Wang Xiao-Ming Zhang You-Lun Xiong |
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Affiliation: | aState Key Laboratory of Digital Manufacturing Equipment and Technology of China, Huazhong University of Science and Technology, Wuhan 430074, PR China;bModern manufacture engineering center of School of Mechanical engineering, Heilongjiang University of science and technology, PR China |
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Abstract: | Dimensional deviation analysis has been an active and important research topic in mechanical design, manufacturing processes, and manufacturing systems. This paper proposes a comprehensive dimensional deviation evaluation framework for discrete-part manufacturing processes (DMP). A generic, explicit, and transmission model is developed to describe the dimensional deviation accumulation of machining processes by means of kinematic analysis of relationships between fixture error, datum error, machine tool geometric error, fixturing force inducing error and the dimensional quality of the product. The developed modeling technology can deal with general fixture configurations. In addition, the local contact deformations of the workpiece–fixture system are determined by solving a nonlinear programming problem of minimizing the total complementary energy of the frictional workpiece–fixture subsystem in machining system. Moreover, the deviation of an arbitrary point on machining feature can be also evaluated based on a point deviation model with prediction dimension deviation from the transmission model. The dimensional error transmission within the machining process is quantitatively described in this model. A systematic procedure to construct the model is presented and validated. This model can be also applied to process design evaluation for complicated machining processes. |
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Keywords: | Machining feature Dimensional deviation Kinematic analysis Deviation transmission Discrete-part machining process |
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