Papers by Keyword: Cutting Torque

Abstract: As a core feature of high-end CNC machine tools, the torque carrying performance of five-axis milling head directly affects the machining accuracy and reliability. Through theoretical analysis and derivation, combining experimental prototype, the A/C-axis cutting torque formula of five-axis milling head on woodworking is obtained. The reliability analysis provides a theoretical basis for drive motor selection and five-axis milling head structural optimization and improvement.

Abstract: In order to better understand the micro-hole cutting processes in stainless steel, the cutting process of 1Cr18Ni9Ti stainless steel was modeled and simulated by FEA (Finite Element Analysis) based on DEFORM-3D software. The influence of rotation speed and feed speed on the thrust force and torque of 1Cr18Ni9Ti stainless steel were analyzed. Meanwhile, the comparisons of simulated results and theoretical calculation results were taken into consideration. It is found that the simulation data from DEFORM-3D agreed well with the theoretical calculation results. It confirms that the results of simulation based on DEFORM-3D have a high level of reliability. The findings of the present study provide a new way to systematically investigate the stainless steel micro-hole drilling process.

Abstract: This paper presents a method for drill wear state monitoring based on recognizing the cutting torque signals. It consists of two steps: firstly, decompose cutting torque components from the original signals by Wavelet Packet Decomposition (WPD); secondly, extracting wavelet coefficients of different wear states (i.e., slight, normal, or severe wear) with signal features adapting to Welch spectrum. The experiments on different tool wears of the multivariable features the results of Monitoring are significant and effective.

Abstract: In this study, an approach by the feed rate control was applied for the improvement of form accuracy in the micro end milling process. In this approach called adaptive control constraint, the feed rate is controlled so that the cutting load is constantly kept and the deflection of tool does not occur. However, this method is not always effective in the micro cutting process that the influence of size effect cannot ignore. Therefore, the relationship between the cutting conditions and the form error in the micro end milling is experimentally investigated. The experiments on the machining of metal mold steel with the micro end mill are carried out and the formulation as function of the cutting conditions and the form error is identified by means of regression analysis. The performance of the feed rate control was validated based on experimental results. As the result, it was confirmed that the form accuracy was improved.