... that the asymmetric flexible machining system has a significant feed direction-dependent characteristics, and implied the existence of high performance machining region with higher stability and lower surface location error (SLE) by contrast with the symmetric milling system and the traditional models. Finally...

... the cutting force and tool/workpiece deflection for user-selected operating parameters. A good agreement between predicted and measured cutting forces is first demonstrated for two non-standard edge geometry endmills. Second, the results of stability tests are compared with simulation predictions for multiple...

...Oguzhan Tuysuz; Yusuf Altintas The machining process induced damping caused by the indentation of the cutting edge into the wavy cut surface greatly affects the process stability in low-speed machining of thermally resistant alloys and hardened steel, which have high-frequency vibration marks...

... error (SLE) and surface roughness under both stable and period-2 bifurcation conditions. These results are summarized. To aid in parameter selection that yields period- n behavior, graphical tools including Poincaré maps, bifurcation diagrams, and stability maps are presented. Manuscript received...

..., it is also shown that the worst spindle speeds for a milling operation can be found without the prior knowledge of modal dynamics and stability lobe diagram. The proposed analytical expressions are confirmed by the existing stability models and experimentally verified. milling stability critical...

..., and increase of roughness. Continuous workpiece speed variation is demonstrated to be an efficient method among chatter suppression techniques but variation parameters (amplitude and frequency) are normally selected based on trial-and-errors. Therefore, a dynamic stability approach is proposed in which optimal...

..., 2013; published online July 17, 2013. Assoc. Editor: Tony Schmitz. 25 12 2012 18 04 2013 23 04 2013 This paper presents a time-domain semi-analytical method for stability analysis of milling in the framework of the differential quadrature method. The governing equation...

... online May 24, 2013. Assoc. Editor: Burak Ozdoganlar. 10 05 2012 18 02 2013 This paper presents the prediction of cutting forces and chatter stability of micro-milling operations from the material's constitutive flow stress and structural dynamics of the micro-end mill. The cutting...

...D. Barrenetxea; J. Álvarez; J. I. Marquínez; J. Madariaga; I. Gallego; I. Muguerza Perelló This paper presents new simulation models and global stability charts that have been developed to analyze the principal instabilities and constraints involved in the throughfeed centerless grinding process...

...M. Eynian; Y. Altintas The accurate prediction of chatter stability in general turning operations requires the inclusion of tool geometry and cutting conditions. This paper presents regenerative chip and regenerative chip area/cutting edge contact length based dynamic cutting force models, which...

... learning process to modify the control rule base of the first layer fuzzy controller based on the desired closed-loop system performance. The stability proof of the proposed control system is provided in Xu and Shin ( 19 ). Due to the high nonlinearities and time-varying characteristics of machining...

...Robert G. Landers; A. Galip Ulsoy Regenerative chatter is a major limitation to the productivity and quality of machining operations due to the excessive rate of tool wear and scrap parts which are produced. Machining chatter analysis techniques examine the stability of the closed-loop model (force...

... controller is designed based on the dynamic EFE model. We then evaluate the performance of the controller such as stability and sensitivity. A self-updating algorithm for the controller will track the latest process information to stabilize the controller output. Finally, we simulate this process adjustment...

.... (c) The scope is extended. Our simplified ray-shooting approach yields a grasp stability index suitable for grasp planning. Numerical examples in fixturing and grasping show the enhancement superiority. Substituting Eqs. 30 , 33 into Eq. 34 yields 35 ξ i ⩽ ξ ¯ i where 36...

... for suppressing regenerative chatter with the critical regenerative effect taken into account. Furthermore, a novel hybrid time and frequency domain approach is developed for generating the stability lobe diagram for the dynamic system after control, since the conventional frequency domain approach is no longer...

...Nejat Olgac; Rifat Sipahi A novel analytical tool is presented to assess the stability of simultaneous machining (SM) dynamics, which is also known as parallel machining . In SM, multiple cutting tools, which are driven by multiple spindles at different speeds, operate on the same workpiece. Its...

.... , 1958 , “ The Chatter of Lathe Tools under Orthogonal Cutting Conditions ,” Trans. ASME 0097-6822 , 80 , p. 1079 . Tlusty , J. , and Polocek , M. , 1963 , “ The Stability of the Machine-Tool Against Self-Excited Vibration in Machining ,” Proc. of the International Research...

...-domain models suffer from being computationally intensive, particularly when they are used to predict the boundary of chatter stability, when a large number of simulation runs are required under different milling conditions. Furthermore, to identify the boundary of stability each simulation must run...

...William T. Corpus; William J. Endres An added family of stability lobes, which exists in addition to the traditional stability lobes, has been identified for the case of periodically time varying systems. An analytical solution of arbitrary order is presented that identifies and locates multiple...

...T. Insperger, Assistant Professor; G. Ste´pa´n, Professor, The stability charts of high-speed milling are constructed. New unstable regions and vibration frequencies are identified. These are related to flip bifurcation, i.e. period doubling vibrations occur apart of the conventional self-excited...