Plane grind-hardening distortion analysis and the effect to grind-hardening layer

Ying, Zhang; Ge, Peiqi; Be, Wenbo

doi:10.1007/s00170-014-6612-y

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…The effective stress of grinding hardening is calculated by the classical thermal-stress coupling method of grinding. [27][28][29] The establishment is briefly introduced as follows.…”

Section: Whole Dislocation Energymentioning

confidence: 99%

“…The stress result of grinding s g is shown in Figure 17. The stress mainly generates in the surface 27,28 q w = m Ftvs blg Grinding force 28,29 F t = 0:43282823(a p ) 0:86 v s ð Þ À1:06 (60v w ) 0:44 Coefficient conducted into the workpiece 29 m = ½1 + ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi layer and it decreases along the depth direction. The surface stress is selected as the following calculation because it has the greatest relation with micro-crack.…”

Section: Whole Dislocation Energymentioning

confidence: 99%

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A research on the mechanism and model of surface micro-damage in grinding hardening

Shi

Zhang

Xiu

2021

Advances in Mechanical Engineering

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Grinding hardening can obtain hardening effect besides fine machining effect on the surface of workpiece. A certain degree of surface micro-damage will be formed during grinding hardening process which mainly contains micro-crack, melting coating, decarburization, and surface scratch. In order to study the micro-damage of grinding hardening, the paper carries on a grinding hardening experiment and the characteristics of micro-damage are observed. The generation mechanism of micro-crack is revealed. It is formed by the accumulation of dislocation pile-up in the condition of grinding hardening process. When the grinding depth reaches a certain value, the surface micro-crack will be produced obviously and become more serious with the increasing of grinding depth. Other micro-damage containing surface melting coating, decarburization, and surface scratch are also studied and their relevance with micro-crack is revealed. Based on the grinding hardening theory and pile-up dislocation theory, a model for micro-crack of grinding hardening is established. The calculating result of the model accords with the experimental result in general.

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“…The effective stress of grinding hardening is calculated by the classical thermal-stress coupling method of grinding. [27][28][29] The establishment is briefly introduced as follows.…”

Section: Whole Dislocation Energymentioning

confidence: 99%

Section: Whole Dislocation Energymentioning

confidence: 99%

A research on the mechanism and model of surface micro-damage in grinding hardening

Shi

Zhang

Xiu

2021

Advances in Mechanical Engineering

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“…Secondly, distortion of workpiece is analyzed by thermal-mechanical coupling numerical analysis to get the actual grinding cutting depth. The increase of cutting depth with the convex distortion, in turn, affects the grinding force, changes the heat flux into the workpiece, and affects the depth of the hardened layer [13]. The relationship among grinding force, grinding distortion, and grind-hardening depth distribution is presented in this paper.…”

Section: Introductionmentioning

confidence: 95%

The study for variable grinding depth to control plane grind-hardening layer depth distribution

Zhang

2015

Int J Adv Manuf Technol

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Heat flux changes in grind-hardening process resulting in uneven distribution of grind-hardening layer depth, making it more difficult to produce a hardened layer in the grinding cutting-in and cutting-out area, leading to uneven distribution of the hardening layer depth in grinding stable region. This paper firstly studied the grinding force. Secondly, grinding distortion is analyzed by thermal-mechanical coupling numerical analysis. The grinding distortion makes the actual grinding depth deeper. According to the distortion, the actual cutting depth can be concluded. The actual cutting depth affects the variation of grinding force. Thirdly, the relationship among grinding force, grinding distortion, and the distribution of the hardening layer depth is presented in the paper. At last, variable grinding cutting depth to control grinding force is put forward to improve the uniformity of the distribution of the hardening layer and is verified by experiment.

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“…Grind hardening is a material process ranging from using the surface heating generated by grinding process to harden the workpiece surface, rapid heating to the austenitizing temperature and rapid cooling down to the martensite transformation temperature [1,2]. Until now, most previous work has focused intensively on the hardening process, hardness uniformity, residual stress and fatigue properties [3][4][5][6][7][8][9][10][11]. Nevertheless, the research of experiments and the regression analysis of grinding hardened layer depth, in the grind-hardening process, are concerned less based on the transverse feed.…”

Section: Introductionmentioning

confidence: 99%

Experiments and Regression Analysis of Grinding Hardened Layer Depth Based on Transverse Feed

Gao

Liu

et al. 2019

KEM

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Based on orthogonal experiments, the influences of grinding process parameters including depth of cut (ap), workpiece infeed velocity (vw) and transverse regrinding value (Cr) on hardened layer depth (HLD) of 40Cr steel are studied in the grind-hardening process. The grind-hardening orthogonal experiments of 3-factors are performed on the 40Cr steel with the L16 (45) orthogonal table and the experimental optimization design theory. To understand quantitatively the effects of three grinding process parameters, the experimental data are modeled by regression. Among three grinding process parameters, the most important parameter is ap, followed by vw and Cr respectively. The experimental results indicate that HLD would increase with the increasing of the depth of cut and the decreasing of the workpiece infeed velocity in grind-hardening process, but HLD would decrease with the increasing of the interaction between the depth of cut and workpiece infeed velocity.

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Plane grind-hardening distortion analysis and the effect to grind-hardening layer

Cited by 12 publications

References 9 publications

A research on the mechanism and model of surface micro-damage in grinding hardening

A research on the mechanism and model of surface micro-damage in grinding hardening

The study for variable grinding depth to control plane grind-hardening layer depth distribution

Experiments and Regression Analysis of Grinding Hardened Layer Depth Based on Transverse Feed

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