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Copyright of Metal Working (1674-165X) is the property of Metal Working Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Inconel 718 mesoscopic thin-walled parts are in increasing demands in aerospace, medicine, communication equipment and other fields. Thin-wall micro-milling deformation is a difficult problem in the field, and micro-milling force is an important factor causing machining deformation. In order to predict the force of thin-wall micro-milling, the finite element simulation model of Inconel 718 thin-wall micro-milling process was established together with the geometric models of the micro-milling tool and thin-wall parts, the mesh division was completed, and the mesh independence was verified. The Johnson-Cook constitutive model and failure criterion were used to describe the material constitutive relationship and chip separation criterion respectively. The modified Coulomb model was used to describe the friction characteristics. The results show that the maximum and average relative errors are 11.23% and 7.04%, respectively, by comparing the micro milling force output of the simulation model with the experimental results, which verifies the effectiveness and accuracy of the model. [ABSTRACT FROM AUTHOR]

Abstract, Aiming at the regenerative chatter problem which restricted the machining efficiency in the milling of thin-walled parts, an adjustable workpiece holder for machining thin-walled parts was proposed based on series mode coupling. Firstly, the adjustable workpiece fixture model was designed based on the principle of series mode coupling, and two new optimal tuning strategies (amplitude tuning and negative real part tuning) were proposed to improve the dynamic stiffness and milling stability of the fixture. Secondly, self-adaptive mechanisms such as rotating spring and eddy current module were used to realize the coupling between fixture mode and part mode, and conductive plate was introduced for damping adjustment. The feasibility and effectiveness of the workpiece fixture were verified by the part milling test with clear mode. The results indicate that the fixture is feasible and effective, the cutting surface roughness decreases from Ra 2.4 µm to Ra 0.9 um when the cutting depth is 3 mm. Compared with the conventional holder, the dynamic stiffness and milling stability of the proposed holder is significantly improved. [ABSTRACT FROM AUTHOR]

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)