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The Possibility of Applying Acoustic Emission Method for Monitoring Lathing Process

References [1] Baran, I., Identyfikacja uszkodzeń korozyjnych zbiorników na paliwa płynne metodą emisji akustycznej , Rozprawa doktorska, Krakow 2013. [2] Baran, I., Nowak, M., Schmidt, J., Ono, K., Potentials of AE application in testing industrial pipelines, Advances in Acoustic Emission, USA 2007. [3] Dudzik, K., The possibility of application acoustic emission method to optimize determination of finish lathing parameters , Journal of KONES Powertrain and Transport; Vol. 22, No. 4, Kudowa Zdrój 2015. [4] Dudzik, K., The possibility

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Acceptability testing and development of a novel wood lathe balanced rest

REFERENCES [1] Carlile , P. R. (2002). A pragmatic view of knowledge and boundaries: Boundary objects in new product development. Organization Science, 13(4), 442-455. Retrieved from https://goo.gl/KTiwzH [2] Darmawan, W ., Nandika, D ., Massijaya, Y ., Kabe, A ., Rahayu, I ., Denaud, L ., & Ozarska, B . (2015). Lathe check characteristics of fast-growing sengon veneers and their effect on LVL glue-bond and bending strength. Journal of Materials Processing Technology, 215, 181-188. Retrieved from https://goo.gl/2E5dy3 [3] Denaud, L

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FEA-Analysis of Shaft and Supports Deformations for Huge Precise Lathe. Statics and Resonances

.S. (2017). Finite element analysis of centerless-lunette turning of heavy shaft. Science & Technique.; 16(3): 196-205. Wu, Dongxu; Wang, Bo; Luo, Xichun; et al. (2015). Design and analysis of aerostatic spindle with high load characteristics for large ultra-precision drum lathe. Proceeding of the institution of mechanical engineers. Part J. Journal of engineering tribology. Volume 229(12), 1425-1434. Zienkiewicz, O.C. and Taylor, R.L., (2000). The finite element method. Vol.1. Basis. Oxford: Butterworth-Heinemann.

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The Effect of Inner Reinforcing Cores on Natural Frequencies of the Lathe Tool Body

Abstract

The contribution is mainly focused on research and development of structural modification of machine tools, lathes in particular. The main aim of the modification is to change the modal properties (mode shapes, natural frequencies) of the lathe tool. The main objective of the contribution will be to formulate, mathematical analyse and evaluate the proposed methods and procedures for structural modifications of the tool, represented by beam body. A modification of modal properties by insertion of beam cores into beam body is studied in this paper. In this paper, the effect of material properties and geometrical parameters of reinforcing cores on natural frequencies of beam body is presented. The implementation will bring benefit on machine productivity, decreasing the machine tool wear and in many cases it will lead to better conditions in the cutting process.

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Development of a computational model of a lightweight vertical lathe with the use of superelements

Abstract

This article presents a process of developing a computational model of a light construction vertical lathe. The model is made using the finite elements method. Due to the complexity of the machine tool and the optimization of the computation time superelements have been used in the model. The application of this method has reduced the computation time allowing the analysis of many variants of the mutual position of the machine components. The results of the analyzes led to the indication of weak links of the machine tool. After the improvement of the machine tool construction the movement of the tool tip and the workpiece was much smaller.

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Analytical investigations of the accuracy of the small diameter tool-joint tapered thread made by a lathe machining

Abstract

The drill string consists of connected drill pipes and other elements. The connection is carried out by screwing of the drill string elements with the help of tool-joint tapered thread. The operational characteristics of the drill pipes depend of the manufacture precision of these tool-joints mostly. The accuracy of the thread is regulated by the accuracy of its profile and the accuracy of its pitch diameter value. The accuracy of the tapered thread manufacturing on the lathe in its depending on the values of the geometric parameters of the lathe tool and the values of deviations of its installation relatively to the workpiece axis is investigated. It is proved that for the tapered thread of form VI profile used for connection of drill pipes with the diameter from 30 mm to 44 mm the most influential factor, in relation to the accuracy of the thread profile is the value of the rake angle. Application of the rake angle value up to −5° according to the research data leads to a deviation from the specified profile of 0.3°, which is more than 35% of the declared standard tolerance on deviations from the profile. Also, the influence of the back rake angle value on the value of the deviation from the standard pitch diameter of the thread is proved. It is proved that the magnitude of the tangential displacement of the nose of the cutter relatively to the axis of the thread up to −0.2 mm can cause a deviation of the profile angle of 0.18°, which is 27% of the standard tolerance.

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The Possibility of Application of the Acoustic Emission Method for Monitoring Friction Processes

References [1] Baran, I., Identyfikacja uszkodzeń korozyjnych zbiorników na paliwa płynne metodą emisji akustycznej , Rozprawa doktorska, Krakow 2013. [2] Baran, I., Nowak, M., Schmidt, J., Ono, K., Potentials of AE application in testing industrial pipelines , Advances in Acoustic Emission, USA 2007. [3] Dudzik, K., The possibility of application acoustic emission method to optimize determination of finish lathing parameters , Journal of KONES, Vol. 22, No. 4, pp. 79-85, Warsaw 2015. [4] Labuda, W., Khudoley, A., The influence of

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Turning operation of AISI 4340 steel in flooded, near-dry and dry conditions: a comparative study on tool-work interface temperature

viscosity at 40°C 20 cSt Flash point 150°C 4 Experimental Conditions Workpiece used – AISI 4340 (∅50 mm × 120 mm) Cutting tool used – TiN coated carbide insert Machine tool – Turning centre (All Geared Conventional Lathe) Cutting fluid – Mineral based (Servocut ‘S’) emulsion Coolant application technique – flooded and near-dry Coolant flow rate – 44.8 ml/hr (near-dry) Mist pressure – 5 bar Planning of experiment – (3 3 = 27) full factorial design Output response – Tool-work interface temperature The experiments

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Accuracy and repeatability positioning of high-performancel athe for non-circular turning

Abstract

This paper presents research on the accuracy and repeatability of CNC axis positioning in an innovative lathe with an additional Xs axis. This axis is used to perform movements synchronized with the angular position of the main drive, i.e. the spindle, and with the axial feed along the Z axis. This enables the one-pass turning of non-circular surfaces, rope and trapezoidal threads, as well as the surfaces of rotary tools such as a gear cutting hob, etc. The paper presents and discusses the interpretation of results and the calibration effects of positioning errors in the lathe’s numerical control system. Finally, it shows the geometric characteristics of the rope thread turned at various spindle speeds, including before and after-correction of the positioning error of the Xs axis.

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