Wyniki wyszukiwania - BazTech

1

Using HSM technology in machining of thin-walled aircraft structures

Bałon Paweł, Rejman Edward, Kiełbasa Bartłomiej, Smusz Robert

Acta Mechanica et Automatica

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2022

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Vol. 16, no. 1

27--33

EN

Subtracting manufacturing technologies have entered that realm of production possibilities which, even a few years ago, could not be directly adapted to direct production conditions. The current machines, i.e. heavy, rigid cutting machines using high spindle speed and high feed speed, allow for manufacturing very thin and relatively long parts for use in the automotive or aerospace industry. In addition, the introduction and implementation of new 70XX aluminium alloys with high strength parameters, as well as monolithic diamond cutting tools for special machining, have had a significant impact on the introduction of high-speed machining (HSM) technologies. The main ad-vantage of the applied manufacturing method is obtaining a very good smoothness and surface roughness, reaching even Sz = 6–10 μm and Sa <3 μm, and about four times faster and more efficient machining compared to conventional machining (for the beam part). Moreover, fixed and repeatable milling process of the HSM method, reduction of operational control, easy assembly of components and increase in the finishing efficiency compared to other methods of plastic processing (forming) are other benefits. The authors present a method using HSM for the manufacturing of aircraft parts, such as the chassis beam at the front of a commuter aircraft. The chassis beam assembly is made of two parts, front and rear, which – through a bolted connection – form a complete element replacing the previous part made using traditional technology, i.e., cavity machining, bending and plastic forming. The implementation of HSM technology eliminates many operations related to the construction of components, assembling the components (riveting) and additional controls during construc-tion and assembly.

2

Modelling the Peak Cutting Temperature During High-Speed Machining of AISI 1045 Steel

Burns T. J., Mates S. P., Rhorer R. L., Whitenton E. P., Basak D.

Engineering Transactions

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2012

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Vol. 60, iss. 2

113-124

EN

This paper presents new experimental data on AISI 1045 steel from the NIST pulse-heated Kolsky Bar Laboratory. The material is shown to exhibit a stifier response to compressive loading when it has been rapidly preheated, than it does when it has been heated using a slower preheating method, to a testing temperature that is below the eutectoid temperature. It is argued, using a simple model for heat generation in the workpiece and the tool during machining, due to Tlusty, that this work has important implications for the modelling of highspeed machining operations. Based on the experimental data, a modification is recommended of the well-known Johnson-Cook constitutive model of Jaspers and Dautzenberg for this material, in order to achieve improved predictions of the peak cutting temperature in machining.

3

Wybrane kierunki zwiększania wydajności procesów skrawania

Adamski W.

Mechanik

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2009

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R. 82, nr 5-6

540-546

EN

Engineering and economic factors stimulating High Speed Machining processes. Requirements specified for the HSM machine tools. Exemplary application of HSM process in PZL Mielec.

4

Intelligent control system for HSM

Vallejo A., Morales-Menendez R., Elizalde-Siller H.

Journal of Automation Mobile Robotics and Intelligent Systems

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2009

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Vol. 3, No. 3

54-63

EN

Next-generation of High-Speed Machining (HSM) systems demand advanced features such as intelligent control under uncertainty. This requires, in turn, an efficient administration and optimization of all system's resources towards a previously identified objective. This work presents an optimization system based on Markov Decision Process (MDP), where an intelligent control guides the actions of the operator in peripheral milling processes. Early results suggest that MDP framework can cope with this application, yielding several benefits, which are discussed in detail. Future work will address the full integration of the developed optimization scheme within a commercial machining center.

5

Wpływ wybranych zespołów obrabiarek do skrawania z dużymi prędkościami na dokładność obróbki

Lehrich K.

Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska

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2002

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nr 4

75-90

PL

Poniższa praca dotyczy analizy literaturowej wybranych zagadnień związanych z obróbką z dużymi prędkościami (High Speed Machining). W pracy przedstawiono stosowane definicje obróbki HSM, jej zalety oraz zastosowanie. Omówiono systemy obrabiarkowe stosowane w obróbce HSM. Przedstawiono rozwiązania konstrukcyjne elektrowrzecion oraz napędów ruchu posuwowego. Zwrócono uwagę na problemy konstrukcyjne występujące w prezentowanych rozwiązaniach. Zaprezentowano wykorzystanie metod symulacyjnych do badań wybranych zespołów obrabiarek.

EN

This paper describes the literature revision of selected problems of Hogh Speed Machining. The definition, advantages and applications were presented in this paper. The machining sytsem, which are used in HSM were described. The design solutions of electrospindle and power transmission of feed drive were presented. The emphasis was put on the design problems in presented solutions. The use of simulation method for the selected machining researches was presented.

6

Rapid Prototyping i Rapid Tooling - rozwój metod i technik szybkiego wytwarzania modeli, prototypów i małoseryjnych wyrobów.

Oczoś K.E.

Mechanik

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1998

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R. LXXI, nr 4

177-187

PL

Rozwój wyrobu i typy modeli. Rapid Prototyping, Rapid Tooling i Rapid Manufacturing. Rozwój metod Rapid Prototyping i technik Rapid Tooling. Przedstawienie postępu w poszczególnych metodach RP i osiągnięć rozwijanych technologii. Obróbka z dużymi prędkościami narzędzi i form.

EN

Development of the product and type of models. Rapid Prototyping, Rapid Tooling and Rapid Manufacturing. Development of the methods and techniques that are used in Rapid Prototyping (RP) and Rapid Tooling (RT). Progress in particular methods of RP and achivements in RT-Technology. High-speed machining of dies and moulds.

7

Postęp w obróbce skrawaniem. Cz.1.: Obróbka z dużymi prędkościami.

Oczoś K.E.

Mechanik

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1998

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R. LXXI, nr 3

109-124

PL

Istota i zastosowanie obróbki z dużymi prędkościami (HSM). Systemy narzędziowe stosowane w procesach HSM. Materiały narzędziowe i narzędzia skrawające. Złącza wrzeciono-narzędzie. Systemy obrabiarkowe HSM. Szybkoobrotowe elektrowrzeciona. Układy napędu posuwowego. Charakterystyka wybranych obrabiarek z bezpośrednim napędem liniowym. Sterowanie procesem HSM. Nowe konstrukcje obrabiarek typu hexapod dla HSM.

EN

The essence and application of High-Speed Machining (HSM). Tool systems used in HSM processes. Cutting tool materials and design. Spindle tool interface design. HSM-machine tool systems. High speed spindles. Feed drive systems. Characteristic of the machine tools equipped with linear motors. HSM process control. New haxapod machine design for HSM.

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Konstruowanie technologicznej warstwy wierzchniej w procesie toczenia z podwyższonymi prędkościami skrawania.

Żebrowski H.

Mechanik

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1998

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R. LXXI, nr 11

686-691

PL

Określanie właściwości technologicznej warstwy wierzchniej. Skrawanie z podwyższonymi prędkościami etapem przejściowym do HSM. Badania technologicznej warstwy wierzchniej (TWW) w procesie toczenia z podwyższonymi prędkościami skrawania. Stereometryczna charakterystyka powierzchni części maszyn.

EN

Properties of the process surface layer. Cutting at high speed as an interim stage to high speed machining (HSM). Testing of the process surface layer (TWW) in turning at high cutting speeds. Stereometric characteristic of the surface of machine elements.