Study on Regenerative Chatter Vibration in Ball End Milling of Flexible Workpieces

Akazawa, Koichi; Shamoto, Eiji

doi:10.2493/jjspe.75.984

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…Researchers, who have dedicated their work to eliminating the self-excited chatter vibration, revealed that the self-excited chatter vibration in milling can be caused by two kinds of mechanisms, 'regeneration' and 'mode-coupling' (Ismal and Vadari, 1990;Akazawa and Shamoto, 2008. It is known that the chatter vibration can be restricted by decreasing the cutting speed and the depth of cut.…”

Section: Suppressing the Self-excited Chatter Vibration Without Decrementioning

confidence: 99%

Improving productivity by using innovative metal cutting solutions with an emphasis on green machining

Goldberg

2012

IJMMM

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In order to sustain competitiveness, manufacturers are expected to strive for higher productivity and profitability without compromising on cost reduction. Competitiveness and higher productivity will consequently preserve more job employment and help meet short delivery times.Cutting tool manufacturers, with an aim to facilitate these targets, strive to demonstrate innovative features that could contribute to the reduction of cutting forces, distribute them more effectively, eliminate vibration and produce easy chip evacuation. Recent development and unique geometry features have contributed to high volume of metal removal with minimum energy consumption. Helical cutting edge geometry and variable-pitch flute patterns are only two examples for eliminating harmonic vibration while machining. In addition, large radius cutting edge configuration tends to axially direct the resultant cutting forces in axial direction towards the spindle. The tooling solutions, as presented in this paper, together with the strategy of dry cutting or MQL machining improve productivity tremendously, while ecologically protect the environment and reduce energy consumption.Reference to this paper should be made as follows: Goldberg, M. (2012) 'Improving productivity by using innovative metal cutting solutions with an emphasis on green machining', Int. He is a Senior Lecturer at Braude College of Engineering, Karmiel, Israel. His research interests include modelling and analysis of machining processes, machinability assessments of exotic materials, design and computer control of machine tool spindle and feed drives -Smart machining systems, analytical and experimental modelling of the mechanics and the dynamics of turning, hole-making and milling processes, development of industrial software packages for machine tool and cutting process, analysis, and diagnostics, and CAD/CAM system development for high speed machining of dies and moulds This paper is a revised and expanded version of a paper presented at 2nd

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Section: Suppressing the Self-excited Chatter Vibration Without Decrementioning

confidence: 99%

Improving productivity by using innovative metal cutting solutions with an emphasis on green machining

Goldberg

2012

IJMMM

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Study on evaluation for cutting performance of ball end milling with straight-line path method for inclined surface using 3D-CAD (Influence of feed direction on cutting mechanism)

Fujita

Iwabe²

2014

Transactions of the JSME (In Japanese)

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In this paper, the cutting mechanism and cutting performance of a ball end mill on an inclined surface using the straight-line path method are investigated. Ball end mills are used to make a variety of products such as molds and dies. However, due to the complexity of the edge shape, the cutting process is not clear, so it becomes difficult to select the tool and an effective method to achieve good cutting performance. Therefore, in this study, the purpose is proposal of high efficient and accurate cutting method using a 5-axis control machine tool. First, a cutting model assembled by a ball end mill and a workpiece with and inclined surface is carried out using 3D-CAD (SolidWorks). Next, the cross-sectional cutting area is calculated by the interference of the rake surface of the tool and the uncut chip volume which can be removed by one cutting operation. Then, the evaluation value corresponding to a cutting torque is defined and calculated. After that, the cutting experiments are done in order to measure the cutting force and machined surface roughness. In addition, the cutting torques are calculated based on these results. Finally, high efficient and accurate cutting method are discussed using the analytical and experimental results, and then the cutting conditions which are expected good cutting performance are shown.

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Estimation Method of Machining Error on Low Rigidity Workpiece for Tool Posture Planning

Ichikawa¹,

Saito²,

Kaneko³

et al. 2017

IJAT

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During cutting of low rigidity workpieces, avoiding elastic deformation due to machining forces is important. In multi-axis cutting of jet engine blades, tool posture is typically determined by trial and error based on the computer-aided machining operator’s experience. In this study, we developed a system of quantitative evaluation of machining error for blade surface finishing process by estimating the cutting force at each cutting point of the blade with different relative tool postures, and analyzing the deformation at each point with a finite element analysis. With the system, we become be able to perform simulations to evaluate tool posture with less shape error, maintaining the machining efficiency.

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Study on Regenerative Chatter Vibration in Ball End Milling of Flexible Workpieces

Cited by 3 publications

References 8 publications

Improving productivity by using innovative metal cutting solutions with an emphasis on green machining

Improving productivity by using innovative metal cutting solutions with an emphasis on green machining

Study on evaluation for cutting performance of ball end milling with straight-line path method for inclined surface using 3D-CAD (Influence of feed direction on cutting mechanism)

Estimation Method of Machining Error on Low Rigidity Workpiece for Tool Posture Planning

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