Study of the measurement and mathematical modelling of temperature in turning by means equivalent thermal conductivity

Rezende, Bruna Aparecida; Magalhães, Frederico de Castro; Rubio, Juan Carlos Campos

doi:10.1016/j.measurement.2019.107275

Cited by 14 publications

(5 citation statements)

References 24 publications

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“…To contact the boron-doped diamonds with the developed measurement electronic, two additional boron-structures with an implantation energy of EI = 101 keV, a width of wbs = 200 µm and a length of lbs = 2.16 mm were implanted to enable a complete current flow through the diamond using a doping-level of dlev = 1E 15 -ions/cm 2 . The two specific contacting surfaces AC are characterised by the dimensions 90 µm x 90 µm and were implanted up to the graphitization limit with a higher doping-level of dlev = 2E 16 -ions/cm 2 to achieve a suitable electrical conductivity κ. To avoid short circuits, which would not allow any temperature measurements, a necessary distance between the contacting structures of dC = 1 mm was selected.…”

Section: Ion-implanted Boron-doped Diamondsmentioning

confidence: 99%

Fundamental Investigations on Temperature Development in Ultra-Precision Turning

Polte,

Hocke,

Uhlmann

2024

Preprint

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Ultra-precision machining represents a key technology for manufacturing optical components in medical, aerospace and automotive industry. Dedicated single crystal diamond tools enable the production of innovative optical surfaces and components with high dimensional accuracies and low surface roughness values in a wide range of airborne sensing and imaging applications concerning space telescopes, fast steering mirrors for scanning and alignment as well as laser communication and high energy laser systems. Despite the high mechanical hardness of single crystal diamonds, temperature-induced wear of the diamond tools occurs during the process. In order to increase the economic efficiency of ultra-precision turning, the characterisation and interpretation of cutting temperatures are of utmost importance. According to the state of the art, there are no precise methods for online temperature monitoring during the process at the cutting edge with regard to the requirements for resolution accuracy, response time and accessibility to the cutting edge. For this purpose, a dedicated cutting edge temperature measurement system based on ion-implanted boron-doped single crystal diamonds as a highly sensitive temperature sensor for ultra-precision turning was developed. To enable highly sensitive temperature measurements, ion-implantation was used for partial and specific boron-doping close to the cutting edge of single crystal diamond tools. Based on the modified electro-sensory properties, the temperature-dependent resistance changes can be measured and correlated with the cutting temperatures during the process. Using the developed cutting edge temperature measurement system enables a holistic view of the temperature development during ultra-precision machining, whereby a correlation between the measured cutting temperatures and the chip formation mechanisms could be identified. According to the results, it was also shown that the cutting edge temperature measurement system with ion-implanted diamonds can be used for both electrically conductive and non-conductive materials. This provides the fundamentals for further research works to identify the complex temperature-induced wear behaviour of single crystal diamonds in ultra-precision turning and serves as the basis for self-optimizing and self-learning ultra-precision machine tools.

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Section: Ion-implanted Boron-doped Diamondsmentioning

confidence: 99%

Fundamental Investigations on Temperature Development in Ultra-Precision Turning

Polte,

Hocke,

Uhlmann

2024

Preprint

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“…Ng et al [44] positioned an IRT to measure the surface temperature at the back of the chip during turning operations. Similarly, Kus et al [22], Motorcu et al [112], Rezende et al [113] and Kunto glu et al [114] positioned their IRTs to measure the temperature at the tool-chip interface during orthogonal turning operations.…”

Section: Infrared Thermometersmentioning

confidence: 99%

A Comparative Review of Thermocouple and Infrared Radiation Temperature Measurement Methods during the Machining of Metals

Leonidas

Ayvar-Soberanis

Laalej

et al. 2022

Sensors

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During the machining process, substantial thermal loads are generated due to tribological factors and plastic deformation. The increase in temperature during the cutting process can lead to accelerated tool wear, reducing the tool’s lifespan; the degradation of machining accuracy in the form of dimensional inaccuracies; and thermally induced defects affecting the metallurgical properties of the machined component. These effects can lead to a significant increase in operational costs and waste which deviate from the sustainability goals of Industry 4.0. Temperature is an important machining response; however, it is one of the most difficult factors to monitor, especially in high-speed machining applications such as drilling and milling, because of the high rotational speeds of the cutting tool and the aggressive machining environments. In this article, thermocouple and infrared radiation temperature measurement methods used by researchers to monitor temperature during turning, drilling and milling operations are reviewed. The major merits and limitations of each temperature measurement methodology are discussed and evaluated. Thermocouples offer a relatively inexpensive solution; however, they are prone to calibration drifts and their response times are insufficient to capture rapid temperature changes in high-speed operations. Fibre optic infrared thermometers have very fast response times; however, they can be relatively expensive and require a more robust implementation. It was found that no one temperature measurement methodology is ideal for all machining operations. The most suitable temperature measurement method can be selected by individual researchers based upon their experimental requirements using critical criteria, which include the expected temperature range, the sensor sensitivity to noise, responsiveness and cost.

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“…The same applies to the Fisher's test, if the F higher value is acceptable and significant [39,[54][55][56]. The assessment was done at a level of α = 0.05 (95% confidence interval) and Fisher's F-test was used to determine the situation in which the composite drilling parameter affects various performance aspects [57][58][59]. The analysis of variance examines the influence of control factors on response effect and allows one to develop a prediction model.…”

Section: Variance Analysis For Cqlmentioning

confidence: 99%

Archive of Mechanical Engineering

Jogendra

Verma

Mondal

2020

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This paper explores the parametric appraisal and machining performance optimization during drilling of polymer nanocomposites reinforced by graphene oxide/carbon fiber. The consequences of drilling parameters like cutting velocity, feed, and weight % of graphene oxide on machining responses, namely surface roughness, thrust force, torque, delamination (In/Out) has been investigated. An integrated approach of a Combined Quality Loss concept, Weighted Principal Component Analysis (WPCA), and Taguchi theory is proposed for the evaluation of drilling efficiency. Response surface methodology was employed for drilling of samples using the titanium aluminum nitride tool. WPCA is used for aggregation of multi-response into a single objective function. Analysis of variance reveals that cutting velocity is the most influential factor trailed by feed and weight % of graphene oxide. The proposed approach predicts the outcomes of the developed model for an optimal set of parameters. It has been validated by a confirmatory test, which shows a satisfactory agreement with the actual data. The lower feed plays a vital role in surface finishing. At lower feed, the development of the defect and cracks are found less with an improved surface finish. The proposed module demonstrates the feasibility of controlling quality and productivity factors.

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Study of the measurement and mathematical modelling of temperature in turning by means equivalent thermal conductivity

Cited by 14 publications

References 24 publications

Fundamental Investigations on Temperature Development in Ultra-Precision Turning

Fundamental Investigations on Temperature Development in Ultra-Precision Turning

A Comparative Review of Thermocouple and Infrared Radiation Temperature Measurement Methods during the Machining of Metals

Archive of Mechanical Engineering

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