scholarly journals Surface integrity of bearing steel element with a new high-efficiency shear thickening polishing technique

Procedia CIRP ◽  
2018 ◽  
Vol 71 ◽  
pp. 313-316 ◽  
Author(s):  
Min Li ◽  
Zhenrong Huang ◽  
Ting Dong ◽  
Meijiao Mao ◽  
Binghai Lyu ◽  
...  
Keyword(s):  
Surface Integrity ◽  
High Efficiency ◽  
Shear Thickening ◽  
Bearing Steel

scholarly journals High-efficiency nano polishing of steel materials

2021 ◽  
Vol 10 (1) ◽  
pp. 1329-1338
Author(s):  
Min Li ◽  
Bernhard Karpuschewski ◽  
Oltmann Riemer
Keyword(s):  
Processing Time ◽  
High Efficiency ◽  
Removal Rate ◽  
Shear Thickening ◽  
Bearing Steel ◽  
Spherical Surfaces ◽  
Spherical Bearing ◽  
Thickening Behavior ◽  
Optimized Conditions ◽  
Abrasive Size

Abstract The application of a specific rheological polishing slurry is proposed first for high-efficiency machining of steel materials to achieve high-quality ultraprecision finished surfaces. The rheology of the polishing slurry was explored to show that the non-Newtonian medium with certain parameters of content components exhibits shear-thickening behavior. Then the new high-efficiency nano polishing approach is applied to process spherical surfaces of bearing steel. Several controllable parameters such as shear rheology, abrasive data, rotational speed, and processing time are experimentally investigated in this polishing process. A special finding is that the surface roughness and material removal rate can increase simultaneously when a small abrasive size is applied due to the thickening mechanism during the shearing flow of slurries. Excessive abrasives can decrease surface quality due to the uneven agglomeration of particles scratching the surface. Under optimized conditions, a high-accuracy spherical bearing steel surface with a roughness of 12.6 nm and roundness of 5.3 μm was achieved after a processing time of 2.5 h. Thus, a potential ultraprecision machining method for target materials is obtained in this study.

High Efficiency Deep Grinding and the Effect on Surface Integrity

2004 ◽  
Vol 257-258 ◽  
pp. 207-212 ◽  
Author(s):  
P. Comley ◽  
D.J. Stephenson ◽  
John Corbett
Keyword(s):  
Surface Integrity ◽  
High Efficiency

Study on Macro-Morphology of Hard Whirling Chips

2012 ◽  
Vol 499 ◽  
pp. 312-317
Author(s):  
Hong Yu Zhu ◽  
Ying Li
Keyword(s):  
High Efficiency ◽  
Online Monitoring ◽  
Rolling Bearing ◽  
Bearing Steel ◽  
Advanced Manufacturing Technology ◽  
Advanced Manufacturing ◽  
Machining Parameters ◽  
Essential Difference ◽  
Average Hardness ◽  
Micro Morphology

The technology of hard whirling is a kind of advanced manufacturing technology which integrates high efficiency, high precision and energy saving as a whole and attracts wide attention in machining field around home and abroad. Through studying on experiment of hard whirling machining on rolling bearing steel which has average hardness at 63.5HRC, this article focuses on different understanding of saw-tooth chips, illustrates the essential difference between macro- morphology and micro-morphology of saw-tooth chips, analyzes macro- morphology of saw-tooth chips with their corresponding machining parameters and finally raises a new solution to implement online monitoring on hard whirling machining.

Surface Integrity of Grinding of Bearing Steel GCr15 with CBN Wheels

CIRP Annals ◽  
1989 ◽  
Vol 38 (1) ◽  
pp. 553-556 ◽  
Author(s):  
Yuan Zhejun ◽  
Hu Zhonghui ◽  
A. Kobayashi
Keyword(s):  
Surface Integrity ◽  
Bearing Steel

Investigation into High-Speed/Super-High Speed Grinding

2011 ◽  
Vol 189-193 ◽  
pp. 4108-4111 ◽  
Author(s):  
Ya Li Hou ◽  
Chang He Li ◽  
Guo Yu Liu
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
High Efficiency ◽  
Dimensional Accuracy ◽  
Abrasive Machining ◽  
Machining Processes ◽  
Finishing Process ◽  
Key Technologies ◽  
High Speed Grinding ◽  
Advanced Machining

Abrasive machining is a widely employed finishing process for different-to-cut materials such as metals, ceramics, glass, rocks, etc to achieve close tolerances and good dimensional accuracy and surface integrity. High speed and super-high speed abrasive machining technologies are newest developed advanced machining processes to satisfy super-hardness and difficult-to-machining materials machined. In the present paper, high-speed/super-high speed abrasive machining technologies relate to ultra high speed grinding, quick-point grinding, high efficiency deep-cut grinding were analyzed. The efficiency and parameters range of these abrasive machining processes were compared. The key technologies and the newest development and current states of high speed and super-high speed abrasive machining were investigated. It is concluded that high speed and super-high speed abrasive machining are a promising technology in the future.

Rheological Properties of Magnetic Field-Assisted Thickening Fluid and High Efficiency Spherical Polishing of ZrO2 Ceramics

2021 ◽  
Author(s):  
Yang Ming ◽  
Xiang ming Huang ◽  
Dong dong Zhou ◽  
Qing Zeng ◽  
Hong yu Li
Keyword(s):  
Magnetic Field ◽  
Shear Rate ◽  
Weak Magnetic Field ◽  
High Efficiency ◽  
Shear Thickening ◽  
Zirconia Ceramic ◽  
Fluid Viscosity ◽  
High Quality ◽  
Rate Range ◽  
Polishing Fluid

Abstract Shear thickening polishing technology using non-Newtonian polishing fluid is a low-cost, low-damage polishing method for the ultra-precision machining of complex curved surfaces. However, the shortcomings of traditional shear thickening polishing fluid in polishing efficiency and fluid viscosity controllability limit its further application., a novel weak magnetic field-assisted shear thickening polishing fluid (WMFA-STPF) containing carbonyl iron particles (CIPs) is presented in this study, which utilizes its weak magnetorheological effect to strengthen the shear thickening phenomenon. The rheological characteristics of the WMFA-STPF samples were investigated. The results show that WMFA-STPF has good fluidity in the low shear rate range and better thickening characteristics in the working shear rate range. In order to verify the high efficiency, high quality and high uniformity polishing ability of the weak magnetic field-assisted shear thickening polishing technology for the spherical surface of zirconia ceramic workpiece, the contrast polishing experiment was designed and finished. The experimental results show that the weak magnetic field-assisted thickening effect can achieve high efficiency and high quality polishing of hard and brittle ceramics. After 75 min polishing, the surface damage was effectively improved and eliminated, the surface quality and uniformity were greatly improved, and the material removal rate reached 7.82 μm/h, increased by 156%.

Contribution to the selection of cutting fluid type and its application technique for grinding of bearing steel

2021 ◽  
pp. 095440542110406
Author(s):  
Raphael Lima de Paiva ◽  
Rodrigo de Souza Ruzzi ◽  
Rosemar Batista da Silva
Keyword(s):  
Prediction Model ◽  
Surface Integrity ◽  
Surface Finish ◽  
Ground Surface ◽  
Bearing Steel ◽  
Cutting Fluid ◽  
Correct Selection ◽  
Fluid Type ◽  
Application Technique ◽  
Selection Of

The elevated heat generation in grinding can develop high temperatures at the contact zone, which can adversely affect the surface integrity of the workpiece, especially when grinding hardened steels with conventional abrasives. Thus, the correct selection of cooling-lubrication condition is essential to avoid or attenuate any possible negative effect to workpiece surface integrity. However, the literature lacks work comparing different cutting fluid application technique (e.g. flood and minimum quantity lubrication – MQL) using the same fluid on both techniques. In this context, this work aims to contribute to the selection of cutting fluid type and its application technique for the grinding of bearing steel. Experimental trials were conducted comparing the use of semisynthetic and synthetic cutting fluids, both applied via conventional (flood) and MQL techniques. Different cutting conditions were also tested. A 24 full factorial design of experiment (DOE) was carried out with the following factors: fluid application technique, type of fluid, workspeed, and radial depth of cut. An analysis of main effects and interactions was performed for surface finish (Ra parameter) results, including a prediction model based on the analysis of variance (ANOVA). The morphology of ground surface and microhardness below machined surface were also analyzed. The results showed that the ground surface finish was strongly dependent on the cutting fluid type and its application technique combination: superior finishing was observed with the combination of semisynthetic fluid delivered via flood technique and with synthetic fluid delivered via MQL technique. From the surface morphology analysis, it was observed that the inferior lubrication capacity of synthetic fluid applied via flood condition deteriorated the surface finish and morphology. The surfaces ground with semisynthetic fluid provided, in general, lower values of Ra and lower microhardness variation. The prediction model for Ra showed a maximum error of 14% in comparison to the measured values.

High Efficiency Precision Surface Grinding of Fused Silica

2011 ◽  
Vol 418-420 ◽  
pp. 1132-1136 ◽  
Author(s):  
Peng Yao ◽  
Ya Dong Gong ◽  
Suo Xian Yuan ◽  
Nobuhito Yoshihara ◽  
Ji Wang Yan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
High Efficiency ◽  
High Surface ◽  
Chip Thickness ◽  
Diamond Wheel ◽  
Fused Silica ◽  
Wheel Wear ◽  
Undeformed Chip Thickness ◽  
Creep Feed

High efficiency and high surface integrity grinding of fused silica lens used in the ultraviolet (UV) laser transmission equipments is highly demanded. It is necessary to decrease the undeformed chip thickness for producing better surface integrity. We conducted creep feed grinding (CFG) and conventional shallow cut grinding (SCG) experiments of fused silica with a resin bond diamond wheel. Experiment results shows that owing to thinner undeformed chip thickness, the normal grinding force, radial wheel wear and P-V value of surface roughness of CFG are smaller than those of SCG at the same MRR. At the same table speed, surface roughness decreased with the increase of MRR in both CFG and SCG as a result of decreased undeformed chip thickness which is attributed to the elasticity of resin bond.

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