Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

Verma, Komal; Belokar, R. M.

doi:10.1155/2016/6198278

Cited by 6 publications

(6 citation statements)

References 23 publications

(28 reference statements)

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“…In the proposed model investigations, it has been observed that rated torque value remains inversely proportional to the lead values. This shows a consistent agreement with the results reported in [18, 28, 29]. Lin and Wu [18] highlighted an approach to utilise modelling for the control error in the CNC machining systems.…”

Section: Analytical Results and Validationsupporting

confidence: 89%

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Experimental investigations of ball screws over static and accelerating torque‐based lead factor in CNC machining centre

Verma¹,

Belokar²

2018

J. eng.

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Section: Analytical Results and Validationsupporting

confidence: 89%

“…Lin and Wu [18] highlighted an approach to utilise modelling for the control error in the CNC machining systems. This work has been extended towards rigorous assessment of [28, 29] along with static and rated toque for CNC marching centre.…”

Section: Analytical Results and Validationmentioning

confidence: 99%

Experimental investigations of ball screws over static and accelerating torque‐based lead factor in CNC machining centre

Verma¹,

Belokar²

2018

J. eng.

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“…Verma and Belokar (2016) reported CNC machining center evaluation over performance parameters. Verma and Belokar (2016) extended by finding the accuracy the deployed model incorporating overall CNC machining center evaluation. Overall, all the graphs reflect linear progressive behaviors and show a strong relationship among pre-loading factor of ball screw and accuracy of feed drive system in CNC machining centers.…”

Section: Detailed Setup and Analytical Results Validationmentioning

confidence: 99%

Inclusive estimations of ball screw-based CNC feed drive system over positioning and pre-loading factor

Verma

Belokar

2018

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Purpose This paper aims to investigate the performance and positioning accuracy of computer numerical controlled (CNC) feed drive system using a ball screw-based pre-loading impact factor. Design/methodology/approach Initially, axial displacement of support bearings has been computed in relation to the different preload values. Among the computed values, a basic rule equation has been developed for the calculation of elongation in the bearings. The value of displacements computed from the developed equation has been considered as a pre-loading value, and its behavior on the feed drive system has been analyzed. Findings The elongation of bearings impacts the positioning accuracy and repeatability of the feed drive system and of CNC machines. Next, an analytical model for the rigorous assessment of CNC feed drive system has been designed and developed. The positioning accuracy of CNC machine in relation with different pre-loading values has been analyzed. Practical implications The results obtained from these investigations enhance the positioning accuracy of CNC machining centers. The optimum pre-loading value has been analyzed among the available ranges, and it has been proposed that optimal results have been achieved at 5 per cent of dynamic load rating. Originality/value This paper proposes improved explorations toward the performance of the CNC machines by optimizing the positioning accuracy through pre-loading. Finally, analytical estimations have been carried out to prove the validity of the proposal.

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“…Next, thermal shift of main spindle in XZ (horizontal), YZ (vertical) and axial plane has been analyzed. Next, proposed work investigated that among the three planes, thermal shift remains maximum in axial direction on the consistent patterns of references [9][10]. In the future, focus of work remains on analysis of spindle from different facets i.e.…”

Section: Discussionmentioning

confidence: 99%

Thermal Stabilization Based Investigations over Quenching Media for Spindle in CNC Machining Centers

Verma¹,

Belokar²

2017

AJME

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The thermal expansion in spindles of computer numeric control (CNC) machines is widespread phenomenon around the world. Thermal change affects the positioning accuracy, repeatability, run out and backlash of the entire machining center. This thermal change in spindle is related with factors like speed and heat. The heat generated during running and machining of work-piece generates considerable amount of heat. This heat further elongates spindle and reduce the performance of spindle and degrade entire efficiency of system. In order to enhance the performance, it is mandatory to dissipate heat at much faster rate than heat generated during machine running and machining. In this paper, thermal equilibrium of spindle front bearing (that is at the nose of spindle) is stabilized up to maximum extent i.e. near to the negligible level. Initially, the spindle stabilized with continuous running at different speed and quenching of spindle by rotating hydraulic oil that will be quenched naturally around the periphery of spindle. Next, hydraulic oil is used for quenching by the circulation of water around the oil reservoir. This removes heat at faster rate. After stabilization of spindle, its impact on the horizontal, vertical and axial plane has been investigated. Finally, analytical investigations have been carried out to prove the validity of spindle stabilization process.

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Pervasive Investigations of Critical Speed over Weight and Deflection Factors of Shaft Assembly in CNC Ball Screw System

Cited by 6 publications

References 23 publications

Experimental investigations of ball screws over static and accelerating torque‐based lead factor in CNC machining centre

Experimental investigations of ball screws over static and accelerating torque‐based lead factor in CNC machining centre

Inclusive estimations of ball screw-based CNC feed drive system over positioning and pre-loading factor

Thermal Stabilization Based Investigations over Quenching Media for Spindle in CNC Machining Centers

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