Study of electrically-assisted indentation for surface texturing

Oh, Hyun-Seok; Cho, Hak-Rae; Park, Hani; Hong, Sung-Tae; Chun, Doo‐Man

doi:10.1007/s40684-016-0020-8

Cited by 19 publications

(2 citation statements)

References 18 publications

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“…Figure 3 shows the analysis model for the laser-induction electromagnetic-thermal coupled analysis. The specific heat and thermal conductivity of the two materials were obtained from previous studies, as shown as Table 1 and Table 2 [15,28], because the thermal analysis using a single heat source from laser and induction was performed in previous studies [29,30]. Heat flow is given sequentially to heat source geometry according to the feed rate by the overlap along the tool path.…”

Section: Thermal Analysismentioning

confidence: 99%

A Study on the Thermal Effect by Multi Heat Sources and Machining Characteristics of Laser and Induction Assisted Milling

Lee

2019

Materials

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Thermally assisted machining (TAM) is an effective method for difficult-to-cut materials, and works by locally preheating the workpiece using various heat sources, such as laser, induction, and plasma. Recently, many researchers have studied TAM because of its low manufacturing costs, high productivity, and quality of materials. Laser assisted machining (LAM) has been studied by many researchers, but studies on TAM using induction or plasma heat sources, which are much cheaper than lasers, have been carried out by only a few researchers. Lasers have an excellent preheating effect, but are expensive, and the temperature of the heated workpiece drops quickly. Here, multi heat sources were used to solve the shortage in supplied heat source with a single heat source. Induction was applied as an additional heat source. The purpose of this study is to analyze the thermal effect and temperature distribution of single heat source and multi heat sources, and compare the machining characteristics according to heat source types. In order to analyze the preheating effect according to the feed rate of the heat sources, a temperature measurement experiment using thermocouples was carried out, and the efficiency of the thermal effect using multi heat sources was verified. In addition, the effectiveness of the thermal analysis results was verified by comparison with the measured temperature distribution. The machining characteristics of Inconel 718 and Ti-6Al-4V with laser, induction, and laser-induction assisted milling (LIAMill) were analyzed, by cutting force and surface roughness.

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Section: Thermal Analysismentioning

confidence: 99%

A Study on the Thermal Effect by Multi Heat Sources and Machining Characteristics of Laser and Induction Assisted Milling

Lee

2019

Materials

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“…In addition, it was explained that the ECM method does not leave thermal or mechanical damage after pattern processing and is simpler than the photolithography process, which has advantages in micropattern processing. Oh [ 7 ] proposed the concept of electrically assisted indentation for surface texturing and studied the effect of current on diamond tool indentation using a Vickers hardness tester. His proposed process is a surface plastic deformation process of metals such as indentation and is applicable to functional surface texturing and marking.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Friction Using Microabrasive Air Jet Machining

et al. 2023

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In this paper, we introduce a microabrasive air jet (micro-AAJ) machining system and describe machining results obtained while using it. Our research activities have focused on the development of micro-AAJ machining methods for friction reduction without requiring a mask. Through this study, we want to show that such processing is possible without a mask when using the AAJ method. In this paper, a micro-AAJ machining system is introduced, and the processing results are described. By comparing the friction coefficient of texturing under various conditions, the relative relationship between the surface shape and the friction coefficient can be identified. We investigated the effect of the relationship between rotating velocity, traverse speed, density of the patterned area and injection pressure on friction. The friction is decreased with a low traverse speed and high-density patterned area under high-speed driving conditions, as verified by experiments using a friction test system.

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