Modelling thermomechanical behaviour of multi-axis machine tools

Delbressine, Flm Frank; Florussen, Ghj Guido; Schijvenaars, LA; Schellekens, Phj Piet

doi:10.1016/j.precisioneng.2005.05.005

Cited by 37 publications

(20 citation statements)

References 5 publications

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“…To detect them using a telescoping ball bar, a special adapter was designed [41]. The adapter was mounted near the milling head of a running spindle for measuring the TCP displacement when the influence of the spindle needs to be detected.…”

Section: Measurement Of Thermal Deformationsmentioning

confidence: 99%

“…In the vertical direction, the adapter`s thermal distortion is minimized by balancing out the magnitude and direction of thermal expansion by different materials, the chosen geometry, and by taking into account different heat loading of the adapter parts. [41,50] Using touch trigger probes clamped in the machine tool's spindle has some advantages. With one probe the thermallyinduced TCP displacements in up to three directions can be detected and the thermal distortion is detected at the centre line of the machine tool spindle.…”

Section: Measurement Of Thermal Deformationsmentioning

confidence: 99%

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Thermal issues in machine tools

et al. 2012

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Section: Measurement Of Thermal Deformationsmentioning

confidence: 99%

Section: Measurement Of Thermal Deformationsmentioning

confidence: 99%

Thermal issues in machine tools

et al. 2012

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“…• Thermo-mechanical errors: Due to the presence of, sometimes changing, internal and external heat/cold sources in machine tools and CMMs and the very often significant expansion coefficients and expansion coefficient differences of machine part materials, the resulting thermal distortion of the machine's structural loop often dominate the accuracy of an executed task [11,13,25,26,[177][178][179]. Expansion coefficient differences may lead to thermal stresses if rules of exact constraint design have not been met carefully.…”

Section: Repeatabilitymentioning

confidence: 99%

Traceability on Machine Tool Metrology: A Review

Mutilba¹,

Gomez-Acedo²,

Kortaberria³

et al. 2017

Preprint

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Errors during manufacture of high value components are not acceptable nowadays in driving industries such as energy and transportation. Sectors such as aerospace, automotive, shipbuilding, nuclear power, large science facilities or wind power manufacture complex and accurate components that demand close measurements and fast feedback into manufacturing processes. New measuring technologies are already available in machine tools, including integrated touch probes and fast interface capabilities. They shall provide the possibility to measure the workpiece during or after the manufacturing process, maintaining the original setup of the workpiece and avoiding the manufacturing process from being interrupted to transport the workpiece to a measuring position. However, the traceability of the measurement process on a machine tool is not ensured yet and measurement data is still not fully reliable for process control or product validation. Due to the similarity between a coordinate measuring machine and a machine tool, some of the methods applied for a correct assessment of uncertainty in coordinate measuring machines are adapted to the challenges of a machine tool. The scientific objective is to determine the uncertainty on a machine tool measurement and, in this way, convert it into a machine integrated traceable measuring process. This paper reviews the fundamentals of machine tool metrology.

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“…While systematic errors can be measured and modelled to reduce their influence using compensation methods, random errors are measured in order to avoid their influence but without compensating them [1][2][3]. The sources of errors can be classified in relation to their origin as dynamic effects [4], static load and motion control effects [5], thermal effects [6,7] and kinematic/geometric errors [8][9][10]. The combination of all these sources of error provides the machining accuracy of the machine tool.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Computer-Assisted Machine Tool Volumetric Verification Process

Aguado¹,

Velázquez²,

Samper³

2016

Int. j. simul. model.

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Nowadays, the accuracy of machining parts is essential in order to compete in a global market as demanding as machining. Due to the high cost of these machines continuous operation is required, with a reduction of the downtime owing to production readiness, maintenance or breakdowns. Among all the sources of error that affect the accuracy of machining parts, this paper is focused on improving the positioning accuracy of the machine. This requires periodic inspection of the machine tool, which should be included in maintenance operations.Volumetric verification is a novel technique that is being progressively introduced in machine tool maintenance operations, significantly reducing the time required. Unlike other techniques, this is based on non-linear mathematical models and the optimization process increases the influence factors. This modelling provides a re-creation of the whole verification process for all the influence factors; this allows the determination of the best measurement system distribution and the identification of techniques to use to characterize geometric errors. Thus, the verification time required is reduced, unnecessary tests are eliminated, the conditions under which real tests should be carried out are obtained in advance and machine tool accuracy is improved.

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Modelling thermomechanical behaviour of multi-axis machine tools

Cited by 37 publications

References 5 publications

Thermal issues in machine tools

Thermal issues in machine tools

Traceability on Machine Tool Metrology: A Review

Modelling of Computer-Assisted Machine Tool Volumetric Verification Process

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