Investigation on Affecting Factors of Vibration in Milling Harden Steel Assembled with Different Hardness

Wang, Yang Yu; Zhou, Hao; Wen, Dong Hui; Ji, Shiming; Wang, Hui Qiang

doi:10.4028/www.scientific.net/kem.546.137

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…The modern instrument base (vibroacoustic and acoustic-emissive sensors) makes it possible to adequately predict and identify the brittle fracturing process by collecting and processing the diagnostic information from the cutting zone [17][18][19]. However, visualization of the cutting zone is practically impossible due to the specific nature of metalworking, and all conclusions made are based mainly on the results of mathematical modeling [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Role of Thin-Film Vacuum-Plasma Coatings and Their Influence on the Efficiency of Ceramic Cutting Inserts

et al. 2018

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The main problem with ceramics used in cutting tools is related to the unpredictable failures caused by the brittle fracturing of ceramic inserts, which is critical for the intermittent milling of cyclic loading. A 125-mm-diameter eight-toothed end mill, with a mechanical fastening of ceramic inserts, was used as a cutting tool for milling hardened steel (102Cr6). For the experiments, square inserts of the Al2O3 + SiC ceramic were used and compared with the samples made of Al2O3 + TiC to confirm the obtained results. The samples were coated with diamond-like coating (DLC), TiZrN, and TiCrAlN coatings, and their bending strength and adhesion were investigated. Investigations into the friction coefficient of the samples and operational tests were also carried out. The effect of smoothing the microroughness and surface defects in comparison with uncoated inserts, which are characteristic of the abrasive processing of ceramics, was investigated and analyzed. The process developed by the authors of the coating process allows for the cleaning and activation of the surface of ceramic inserts using high-energy gas atoms. The impact of these particles on the cutting edge of the insert ensures its sharpening and reduces the radius of curvature of its cutting edges.

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Section: Introductionmentioning

confidence: 99%

The Role of Thin-Film Vacuum-Plasma Coatings and Their Influence on the Efficiency of Ceramic Cutting Inserts

et al. 2018

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“…After splicing, due to the existence of impact vibration, milling vibration spectrum of the main frequency concentrated at 414 Hz, which is considered as the main frequency of the impact vibration, and the energy accumulates here. 27 Then, the single-factor experimental method was used to simulate the surface topography of the workpiece after four groups. The four groups of simulation are selected on the principle of the pre-and poststitched points.…”

Section: Simulation Of Surface Topography Considering Impact Vibrationmentioning

confidence: 99%

Section: Simulation Of Surface Topography Considering Impact Vibrationmentioning

confidence: 99%

Effects of surface splicing characteristics of the hardened steel mold on the machined surface topography

Liu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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The car cover mold has characteristics of large structure size, complicated surface shape, dimensional precision, and high surface precision. The milling process of the splicing transition zone having different hardness can easily produce load mutation, which has an impact on the tool in the form of vibration. This vibration affects the surface topography of the splicing transition zone. In this article, we propose the surface motion model for ball-end milling cutter with impact vibration and the surface topography prediction model for splicing transition zone which is established based on the Non-Uniform Rational B-Splines (NURBS) surface control point reconstruction. Then, the effects of surface splicing characteristics (different hardness, over-seam scale, etc.) and processing parameters on the surface topography and on the residual height have been analyzed. Finally, based on the hardened steel surface splicing milling experiment, the accuracy of the surface topography model in which vibration impact has been incorporated is verified. At the same time, the corresponding roughness value and fractal dimension are calculated on the basis of two-dimensional contour graph under different splicing characteristics. The results show that the non-linear characteristics of the surface topography of the hardened steel surface are significant, and the best processing parameters can be obtained under different splicing characteristics.

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“…analyzed the influence of cutting parameters on acceleration response under the condition of milling with a single hardness (Cr12MoV) and assembled different hardness through cutting experiment. The results showed that the peak acceleration signal changes in stage leap way in hardness transition zone [4]. Changqing Du etc.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characteristics Analysis of Hardened Steel Die Transition Region in Machining Process

Zhang

Liu

et al. 2016

MSF

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Due to the transition region with different hardness, the milling process of assembled hardened steel die is prone to generate flutter, which is hard to ensure surface integrity of workpiece. By establishing the finite element model, the milling process of assembled hardened steel die was calculated by the finite element method. Effects of cutting parameters on milling force and milling temperature were achieved by the above finite element analysis. The laws of the stress and the thermal field distribution in the assembled transition region are analyzed and discovered. The analysis results demonstrate that milling force and milling temperature of the transition region changes in step leaping way. There is a close relationship between processing stability and cutting parameters. The stress and the thermal distribution of the transition region have a significant difference due to the changes in material hardness.

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Investigation on Affecting Factors of Vibration in Milling Harden Steel Assembled with Different Hardness

Cited by 4 publications

References 2 publications

The Role of Thin-Film Vacuum-Plasma Coatings and Their Influence on the Efficiency of Ceramic Cutting Inserts

The Role of Thin-Film Vacuum-Plasma Coatings and Their Influence on the Efficiency of Ceramic Cutting Inserts

Effects of surface splicing characteristics of the hardened steel mold on the machined surface topography

Thermal Characteristics Analysis of Hardened Steel Die Transition Region in Machining Process

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