Experimental Methodology for Discretization and Characterization of the Rigidities for Large Components Manufacturing Machines

Arsuaga, Mikel; Lobato, Raphael Longuinhos Monteiro; Rodrigue, Abby; Lacalle, Luis Norberto López de

doi:10.1016/j.proeng.2013.08.247

Procedia Engineering

2013

DOI: 10.1016/j.proeng.2013.08.247

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Experimental Methodology for Discretization and Characterization of the Rigidities for Large Components Manufacturing Machines

Mikel Arsuaga¹,

Raphael Longuinhos Monteiro Lobato²,

Abby Rodrigue

et al.

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Cited by 2 publications

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Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts

Choi

Ha²,

Kim³

et al. 2013

JPEE

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In order to prevent unwanted excited vibrations and to secure better machining precision in large size heavy duty machine tools dynamic stiffness is one of the most desirable and critical properties. In the past decades, many researches on machine tool stiffness test and evaluation methodology have been made. However any methodology for a Pin Turning Device (PTD), which is a special kind of turning lathe for machining big size crankshaft pins, is rarely found among them. This study proposes a test and evaluation process of stiffness of a PTD by measuring frequency response function at the tool center point (TCP). For conformance proving for the proposed methodology, stiffness of a PTD obtained by the proposed method with impact hammer test (IHT) has been compared with that determined by FEM.

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Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts

Choi

Ha²,

Kim³

et al. 2013

JPEE

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Stiffness Evaluation of a Heavy-Duty Multi-Tasking Lathe for Large Size Crankshaft Using Random Excitation Test

Choi¹,

Ha²,

An³

2014

Journal of the Korean Society for Precision Engineering

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Machine tool vibration is well known for reducing machining accuracy. Because vibration response of a linear structure generally depends on its transfer function if the magnitude of excitation were kept constant, this study introduces a RET(Random Excitation Test) based on FRF method to evaluate stiffness of a prototype HDMTL(Heavy-Duty Multi-Tasking Lathe) for large crankshaft of marine engine. Firstly, two force loops of the lathe and corresponding structural loops were identified:1) workpiece-spindle-head stock-main bed, 2) workpiece-tool post-carriage bed. Secondly, compliances of each structural loop were measured respectively using RET with a hydraulic exciter and then converted into stiffness. Finally, the measured stiffness was compared with that obtained previously by FEM analysis. As the result, both measured and computed stiffness were closely in agreement with each other. And the prototype HDMTL has evidently sufficient rigidity above ordinary heavy-duty lathes.

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Experimental Methodology for Discretization and Characterization of the Rigidities for Large Components Manufacturing Machines

Cited by 2 publications

References 6 publications

Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts

Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts

Stiffness Evaluation of a Heavy-Duty Multi-Tasking Lathe for Large Size Crankshaft Using Random Excitation Test

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