Mathematical Modeling and Simulation of Fluid Velocity Field in Grinding Zone with Smooth Grinding Wheel

Li, Changhe; Hou, Yu; Li, Jingyao; Han, Zhenlu; Ding, Yucheng

doi:10.1166/asl.2011.1344

Cited by 5 publications

(4 citation statements)

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“…On the basis of the calculation results, the following conclusions are drawn: (1) This study was focused on the theoretical modeling and numerical simulation about the unbalanced response of spindle system of high speed grinder. A theoretical model about moment balance equations, and the transition matrix, the state vector, field matrix was established using the transfer matrix method.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of Unbalanced Response for Coupled Double-Rotor Spindle System of High Speed Grinder

Wang

Ding

2012

KEM

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This study was focused on the theoretical modeling and numerical simulation about the unbalanced response for coupled double-rotor spindle system of high speed grinder. Based on the rotor dynamics, a theoretical model was established using the transfer matrix method. The moment balance equations, and the transition matrix, the state vector, field matrix of coupled double-rotor spindle system of high speed grinder were analyzed and calculated. The numerical results showed that the amplitude of unbalance response increased by the same multiple as that of the amount of unbalance at different locations and at different speeds. Furthermore, the position most sensitive to the unbalance was the front end of rotor 2, followed by the middle and back end of rotor 2. Rotor 2 was especially sensitive to unbalance. Moreover, the vibration amplitudes of the front end, front and back bearings of rotor 1 increased in response to unbalanced increase of rotate speed. The vibration amplitude abruptly increased at 17500r/min corresponding to first-order critical speed.

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Section: Discussionmentioning

confidence: 99%

“…The spindle of high speed grinder is a typical high speed bearings-rotor dynamics system which is coupled double-rotor spindle system, and its rotating speed far surpasses the critical speed of the low order system [1][2]. The realization of dynamic balance is associated with the performance and stability of the whole equipment.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Unbalanced Response for Coupled Double-Rotor Spindle System of High Speed Grinder

Wang

Ding

2012

KEM

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“…Moreover, the production and discharge of cutting fluids cause serious ecological pollution. The wet cutting method also increases production cost, including the purchase cost of heavy MCFs, the disposal cost of wastewater, etc, with amounts far greater than the use cost of the tool [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Zhang

et al. 2022

Int. J. Extrem. Manuf.

Self Cite

157

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Metal cutting fluids in flood condition does not meet the urgent needs of emission cutting and carbon reduction, minimum quantity lubrication (MQL) is an effective alternative to flood lubrication. Nevertheless, the micro-droplets produced by pneumatic atomization MQL have poor infiltration and wetting properties, which cannot fully exert the film-forming and heat transfer performance of lubricant. The unique empowering mechanism of electrostatic atomization can not only solve the above technical bottleneck, but also realize parametric control of the droplets. Previously, the improvement of tool wear and surface integrity of electrostatic atomization have been preliminarily verified by experimental studies. However, the application principle of electrostatic atomization in the manufacturing process is ambiguous, which limits its further development and industrial application. Especially the in-depth understanding of the action mechanism of the high temperature and high pressure contact interface is difficult and meaningful. More importantly, electrostatic atomization-assisted MQL machining has not been systematically reviewed. In this review, firstly, an analysis of the critical devices, common media (nano-biolubricants) and empowering mechanisms is presented. Subsequently, the excellent machining performance of nano-biolubricants was quantitatively evaluated by comparing with flood, revealing its advanced lubrication and heat transfer mechanism. Furtherly, the excellent machining performance was assessed based on the enhanced penetration, infiltration and film formation properties of electrostatic atomization, with a 42.4% reduction in tool wear and a 47% improvement in machined surface Ra compared to pneumatic atomization. Finally, the limitations of current electrostatic atomization and green lubrication technologies are analyzed and the future trends (e.g. new processes and multi-process coupling) are foreseen. The aim of this paper is to provide a comprehensive review and critical assessment of the existing understanding, which can be used by scientists to gain insight into the mechanism of action, the theoretical basis, machining performance and development direction of new electrostatic atomization processes.

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“…Later the American Goodman formally presented influence coefficient method based on least square method, and its advantages were as follows: electronic computer could be used to assist dynamic balance; the identification of unbalance factors was not affected by bearing characteristics; it could balance several vibration models simutaneously, which was more convenient especially for the balance of the shafts [1][2][3]. However, the number of times of start-up in high speed balance was more, and the susceptibility of high order modes was reduced [4][5][6][7][8][9]. Based on the basic theories of rotor dynamics and structural system dynamics, dynamics theory model of the spindle system of high speed grinder was established using the transfer matrix method and the overall transfer matrix method in this study, and the simulation study was conducted on the influence of dynamic and static stiffness and the dynamic characteristics of coupled double-rotor spindle system.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Static and Dynamic Stiffness for Coupled Double-Rotor Spindle System of High Speed Grinder

Hou

Mao²

2012

KEM

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This study was focused on the theoretical modeling and numerical investigation about the dynamic and static stiffness of coupled double-rotor spindle system of high speed grinder. The moment balance and the transition matrix, the state vector, field matrix of spindle system of high speed grinder were analyzed and deduced. The theoretical models about dynamic and static stiffness were established using the transfer matrix method. The numerical results showed that increased rigidity of front bearing significantly increased static and dynamic rigidity of spindle end and the rigidity of front bearing increased, dynamic rigidity increased more significantly than static rigidity. Furthermore, it can be conclued that increased overhang length reduced dynamic and static rigidity of spindle end at an increasingly slower rate and the span of bearing increased, static and dynamic rigidities of spindle end were reduced

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Mathematical Modeling and Simulation of Fluid Velocity Field in Grinding Zone with Smooth Grinding Wheel

Cited by 5 publications

References 0 publications

Analysis of Unbalanced Response for Coupled Double-Rotor Spindle System of High Speed Grinder

Analysis of Unbalanced Response for Coupled Double-Rotor Spindle System of High Speed Grinder

Electrostatic atomization minimum quantity lubrication machining: from mechanism to application

Analysis of Static and Dynamic Stiffness for Coupled Double-Rotor Spindle System of High Speed Grinder

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