The study of plasma-assisted machining to Inconel-718

Chen, Shao-Hsien; Tsai, Kun-Tan

doi:10.1177/1687814017735789

Cited by 15 publications

(2 citation statements)

References 10 publications

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“…The commonly used machining methods currently are plasma rough machining and diamond grinding wheel precision machining. Plasma rough machining results in a relatively severe heat-affected zone and also generates waste gases such as nitrogen oxides and carbon monoxide [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Effect of initial temperature on cutting speed in liquid nitrogen assisted abrasive suspension jet machining of tungsten steel

Qiang,

Teng,

Fei

et al. 2024

Preprint

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Liquid nitrogen assisted abrasive suspension jet (LN2-ASJ) is a combined machining method of cooling before cutting, which can greatly improve the efficiency of ASJ machining tungsten steel (hard alloy). The reduction in machining temperature changes the mechanical properties of the material, thereby affecting the fracture mode and failure speed. This paper focused on YG8/YG20 tungsten steel, analyzed its failure process at low temperatures, established a mathematical model for cutting speed, elucidated the effect of initial temperature on cutting speed, and conducted LN2-ASJ cutting experiments. The results showed that ductile fracture always occurs at the initial kerf. As the kerf depth increases, tungsten steel may begin to undergo brittle fracture, with the occurrence coordinates of brittle fracture depending on the initial temperature. The cutting speed in the brittle fracture area (18.88-21.21mm/s) is approximately 8 times that in the ductile fracture area (2.39-3.87mm/s), with the optimal cutting performance achieved when the initial temperature is controlled at -80°C. Compared to room temperature, LN2-ASJ increased the average cutting speed of YG8 by 32% (from 3.71mm/s to 4.90mm/s) and that of YG20 by 37% (from 3.95mm/s to 5.43mm/s).

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Section: Introductionmentioning

confidence: 99%

Effect of initial temperature on cutting speed in liquid nitrogen assisted abrasive suspension jet machining of tungsten steel

Qiang,

Teng,

Fei

et al. 2024

Preprint

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“…TAM uses heat sources such as laser, induction, and plasma to locally preheat the workpiece and soften it. In particular, as laser technology has improved, many researchers have studied laser-assisted machining (LAM), a type of TAM [7,8]. The LAM is an eco-friendly machining method that uses the high-density laser beam to soften workpieces and removes the material with cutting tools along the machining path.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Laser-Assisted Machining of Carbon Fiber Reinforced Silicon Carbide

2019

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In recent years, as replacements for traditional manufacturing materials, monolithic ceramics and carbon fiber reinforced silicon carbide (C/SiC) ceramic matrix composites have seen significantly increased usage due to their superior characteristics of relatively low density, lightweight, and good high temperature mechanical properties. Demand for difficult-to-cut materials is increasing in a variety of area such as the automotive and aerospace industries, but these materials are inherently difficult to process because of their high hardness and brittleness. When difficult-to-cut materials are processed by conventional machining, tool life and quality are reduced due to the high cutting force and temperatures. Laser-assisted machining (LAM) is a method of cutting a workpiece by preheating with a laser heat source and lowering the strength of the material. LAM has been studied by many researchers, but studies on LAM of carbon–ceramic composites have been carried out by only a few researchers. This paper focuses on deducing the optimal machining parameters in the LAM of C/SiC. In this study, the Taguchi method is used to obtain the major parameters for the analysis of cutting force and surface roughness under various machining conditions. Before machining experiments, finite element analysis is performed to determine the effective depth of the cut. The cutting parameters for the LAM operation are the depth of cut, preheating temperature, feed rate, and spindle speed. The signal to noise (S/N) ratio and variance analysis (ANOVA) of the cutting force and surface roughness are analyzed, and the response optimization method is used to suggest the optimal machining parameters.

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