Impact phenomena in the case of some non-traditional machining processes

Slătineanu, Laurenţiu; Coteaţă, Margareta; Dodun, Oana; Iosub, Adrian; Apetrei, Lăcrămioara

doi:10.1007/s12289-008-0124-y

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…1. The equipment does not require highly skilled personnel as its involvement in the process is minimal [4]. The concentrator used in the ultrasonic welding experiments of copper sheets was designed with the CARD software.…”

Section: Cooper Ultrasonic Welding Experimental Resultsmentioning

confidence: 99%

Experimental Research on Ultrasonically Welded Copper

Apetrei

Rață

Severin

2014

AMM

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Ultrasonic processing proves particularly effective in leading branches of technology, such as: precision mechanics, optics, electrical engineering, nuclear technology etc. High-strength joints, short machining time and low energy consumption are only three of the main ultrasonic welding advantages that determined research intensification in this field. This paper presents experimental data that illustrates the interdependence between some process parameters and their influence on the joint resistance of the copper sheet ultrasonically welded. Due to the surface friction energy, which is generated in the ultrasonic welding process, some intermolecular connections are broken and other are new are created. In order to demonstrate the quality of the ultrasonically welded copper, there were made macro and microstructural analysis that are proving an excellent metallurgical bonding. The results of microhardness tests, that were made in five different points, on each welded copper sample, revealed the ultrasonic welding process quality showing that the welded material hardness doesn't change. The copper welding experiments were made at the National Research and Development Institute for Welding and Material Testing (ISIM) Timişoara.

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Section: Cooper Ultrasonic Welding Experimental Resultsmentioning

confidence: 99%

Experimental Research on Ultrasonically Welded Copper

Apetrei

Rață

Severin

2014

AMM

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“…The material removal in different machining process can be performed in different modalities One of the modalities is based upon impact phenomenon, i.e. micro-cracking, micro-cutting, melting and vaporizing of small quantity of metal from workpiece surface layer by ions impact (Slătineanu, Coteaţă, Dodun, Iosub, & Apetrei, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, nano-manufacturing refers to the production of devices where some of the dimensions are in the nanometer range. Slătineanu et al 2008 develop some mathematical equation to describe non-traditional machining process based on impact phenomenon for ions/electrons, impact of ions (negative and positive)/electrons on metallic surface with the help of electrical discharge machining process and finding out ion penetration.…”

Section: Introductionmentioning

confidence: 99%

A review of few unconventional machining processes based on the concept of velocity shear instability in plasma

Tyagi

2014

Production & Manufacturing Research

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In this article, published work on unconventional machining process, plasma spray process, plasma etching and abrasive jet machining has been summarized. In unconventional machining process, based on the concept of velocity shear instability in plasma, the material is removed from metallic surface by the impact of ions. Singlecrystal silicon surface roughness (up to nanometer sizes) induced by gas plasma in plasma etching based on the concept of velocity shear instability in plasma has been achieved. The material removal from metallic surface can be explained on the basis of erosion phenomena. Momentum transfer from ions to abrasive particles accelerates micron-sized abrasive particles. In this process, material removal from metallic surfaces varies from a few milligrams to a few grams per second. Plasma spray process is based on the concept of velocity shear instability in plasma. In this process, heat generated in plasma and velocity of ions is used to develop high quality surface. Actually, the velocity of ions depend upon different parameters like magnetic field, homogenous D.C electric field, shear scale length, temperature anisotropy, heterogeneity in D.C electric field, density gradient, etc. Therefore, a combination of aforementioned parameters is selected to suit the requirement.

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“…The ultrasonic welding process is based on the cumulative action of the static force, that presses the working pieces, and of the dynamic force, determined by the ultrasonic vibrations. The static force is acting perpendicular to the working pieces and the dynamic force in parallel with them [1]. The oscillating tension, which appear in the working pieces, leads to slides between them, determine in the same time, the expulsion of foreign particles between the contact surfaces.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Aluminium Ultrasonic Welding Parameters

Apetrei

Rață

et al. 2014

AMM

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Research evolution timely tendencies, in the nonconventional technologies field, are: manufacture conditions optimization and complex equipments design. The increasing of ultrasonic machining use, in various technologies is due to the expanding need of a wide range materials and high quality manufacture standards in many activity fields. This paper present a experimental study made in order to analyze the welded zone material structure and welding quality. The effects of aluminium ultrasonic welding parameters such as relative energy, machining time, amplitude and working force were compared through traction tests values and microstructural analysis. Microhardness tests were, also, made in five different points, two in the base material and three in the welded zone, on each welded aluminium sample. The aluminum welding experiments were made at the National Research and Development Institute for Welding and Material Testing (ISIM) Timişoara. The ultrasonic welding temperature is lower than the aluminium melting temperature, that's so our experiments reveal that the aluminium ultrasonic welding process doesn't determine the appearance of moulding structure. In the joint we have only crystalline grains deformation, phase transformation and aluminium diffusion.

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Impact phenomena in the case of some non-traditional machining processes

Cited by 6 publications

References 1 publication

Experimental Research on Ultrasonically Welded Copper

Experimental Research on Ultrasonically Welded Copper

A review of few unconventional machining processes based on the concept of velocity shear instability in plasma

Experimental Investigations on Aluminium Ultrasonic Welding Parameters

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