High efficiency machining by high speed grinding — Application of camshaft

JSAE Review ◽  
1995 ◽  
Vol 16 (3) ◽  
pp. 323
Author(s):  
K Shima
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
High Speed Grinding

Ultra-High Speed Grinding Using a CBN Wheel for a Mirror-Like Surface Finish

2005 ◽  
Vol 291-292 ◽  
pp. 67-72 ◽  
Author(s):  
M. Ota ◽  
T. Nakayama ◽  
K. Takashima ◽  
H. Watanabe
Keyword(s):  
Surface Finish ◽  
High Speed ◽  
High Efficiency ◽  
Ground Surface ◽  
Machining Process ◽  
Grinding Wheel ◽  
Cbn Wheel ◽  
Ultra High Speed ◽  
High Speed Grinding ◽  
Grinding Conditions

There are strong demands for a machining process capable of reducing the surface roughness of sliding parts, such as auto parts and other components, with high efficiency. In this work, we attempted to grind hardened steel to a mirror-like surface finish with high efficiency using an ultra-high speed grinding process. In the present study, we examined the effects of the work speed and the grinding wheel grain size in an effort to optimize the grinding conditions for accomplishing mirror-like surface grinding with high efficiency. The results showed that increasing the work speed, while keeping grinding efficiency constant, was effective in reducing the work affected layer and that the grinding force of a #200 CBN wheel was lower than that of a #80 CBN wheel. Based on these results, a high-efficiency grinding step with optimized grinding conditions was selected that achieved excellent ground surface quality with a mirror-like finish.

Development and Experimental Investigation of a High Speed Grinding Spindle Equipped with Fully-Ceramic Bearings and Ceramic Shaft

2010 ◽  
Vol 156-157 ◽  
pp. 1366-1371 ◽  
Author(s):  
Song Hua Li ◽  
Yu Hou Wu ◽  
Li Xiu Zhang
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Damping Ratio ◽  
Tetragonal Zirconia ◽  
Rotational Inertia ◽  
Motorized Spindle ◽  
Operating Life ◽  
Conventional Steel ◽  
Spindle Shaft ◽  
High Speed Grinding

Trend of the high-speed and high efficiency machining has pushed the continuous demand of higher spindle speed and power for the machining center application. However, Conventional steel spindles are not appropriate for high speed operation because of their high rotational inertia and low damping ratio. Moreover, heat generation and dynamic loading caused by high speed rotation have been obstacles for increasing the speed limit in many conventional steel spindles applications. Apart from optimizing lubrication, the application of new materials is an interesting alternative to increase the boundary speed and life-span of roller bearings for machine-tool spindles. In this study, a high speed grinding motorized spindle equipped with hot isostatically pressed silicon nitride (HIPSN) fully-ceramic ball bearings without inner rings and yttria partially stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic spindle shaft was designed for higher speed, rigidity, precision and longer operating life. Furthermore, the characteristics of ceramic motorized spindle, such as temperature increase, vibration, power, rigidity, noise and so on, were investigated by the experimentation. The results show that the ceramic motorized spindles have good behaviors under low load, high speed grinding conditions.

Development and Key Technologies of High-Speed Grinding

2012 ◽  
Vol 723 ◽  
pp. 445-449 ◽  
Author(s):  
Yong Yu ◽  
Pei Quan Guo ◽  
Yan Ke Cao ◽  
Xiao Wei Wang ◽  
Pu Zhang
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
The Other ◽  
Belt Grinding ◽  
Spindle System ◽  
Abrasive Belt ◽  
Key Technologies ◽  
High Speed Grinding

The mechanism and characteristic of high speed grinding and the technology and development of high speed grinding were introduced. High efficiency grinding including ultrahigh speed grinding, high efficiency deep grinding, creep deep grinding and abrasive belt grinding was analyzed. The technology about manufacturing the spindle system in super high speed grinding and the other main interrelated technology about grinding were also described.

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.

FEM Simulation of Strain Rate in High Speed Grinding

2011 ◽  
Vol 223 ◽  
pp. 813-820 ◽  
Author(s):  
Bei Zhi Li ◽  
Jia Ming Ni ◽  
Zhen Xin Zhou ◽  
Jian Guo Yang
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Speed ◽  
High Efficiency ◽  
High Strain ◽  
Fem Simulation ◽  
Process Condition ◽  
Positive Influence ◽  
Analytical Models ◽  
High Speed Grinding

Simulation of FEM based grinding process has a lot of advantages in comparison with analytical models. In this paper, firstly, a simulation model of single grit high speed grinding for DIN-41Cr4 and Ti6Al4V by commercial software DEFORM 3D has been described. And then, grinding experiments and microscope observations of the single grit high speed scratch tests on both materials have been carried out. The end results show that the wheel velocity has a positive influence on the strain rate. Additionally, the temperature lag effect will be much more significant under high-strain-rate process condition. In other words, it is the theoretic element of temperature decrease phenomenon on the wheel-workpiece contact area during high speed grinding. Furthermore, it is found that the high strain rate also optimizes the chip formation performance, which makes it possible to machine difficult-to-cut materials, titanium alloy for example, with high efficiency.

Research on Wheel Wear in HIPSN Bearing Ring High Speed Grinding

2009 ◽  
Vol 416 ◽  
pp. 77-81
Author(s):  
He Wang ◽  
Yu Hou Wu ◽  
Ke Zhang ◽  
Song Hua Li
Keyword(s):  
Silicon Nitride ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Grinding Force ◽  
Wheel Wear ◽  
Bearing Ring ◽  
Ceramic Bearing ◽  
Grinding Ratio ◽  
High Speed Grinding

This paper reports on the wheel wear in high speed grinding silicon nitride used metal bond diamond wheels. The investigation focuses on the relation among grinding force, grinding ratio and wheel wear. Experiments have been performed to investigate the factor of wheel wear such as grinding ratio and grinding force. The results of these investigations are presented in this paper. With the application of this technology, a low cost production and high efficiency of ceramic bearing ring grinding can be realized.

One-step Separation and Purification of Four Phenolic Acids from Stenoloma chusanum (L.) Ching by Medium-pressure Liquid Chromatography and High-speed Counter-current Chromatography

2019 ◽  
Vol 9 (2) ◽  
pp. 138-143
Author(s):  
Tianyun Li ◽  
Xiling Dai ◽  
Yichen Li ◽  
Guozheng Huang ◽  
Jianguo Cao
Keyword(s):  
Natural Products ◽  
Liquid Chromatography ◽  
Phenolic Acids ◽  
High Speed ◽  
High Efficiency ◽  
Total Phenolic ◽  
Medium Pressure ◽  
Medium Pressure Liquid Chromatography ◽  
One Step ◽  
Counter Current

Background:Stenoloma chusanum (L.) Ching is a Chinese traditional medicinal fern with high total flavonoid and total phenolic content. Traditionally, phenolic compounds were separated by using column chromatography, which is relatively inefficient. </P><P> Objective: This study aims to use an efficient method to separate natural products from S. chusanum by Medium-Pressure Liquid Chromatography (MPLC) and High-Speed Counter-Current Chromatography (HSCCC).Methods:In the present research, firstly, a sample (2.5 g) from the dichloromethane extract of S. chusanum was separated by MPLC. Next, fraction P5 was purified by HSCCC with a two-phase solvent system composed of hexane-ethyl acetate-methanol-water (HEMWat) at a volume ratio of 2:4:1:4 (v/v/v/v). </P><P> Result: Four phenolic acids were obtained and their structures were identified by means of NMR and ESI-mass analysis. They were identified as: 1) protocatechuic acid (34 mg, purity 90.1%), 2) syringic acid (66 mg, purity 99.0%), 3) p-hydroxybenzoic acid (5 mg, purity 91.2%) and 4) vanillic acid (6 mg, purity 99.3%).Conclusion:The combination of MPLC and HSCCC is a high-efficiency separation method for natural products. This is the first report with regard to the separation of four phenolic acids in one step by MPLC and HSCCC from S. chusanum (L.) Ching.

scholarly journals On-chip trans-dimensional plasmonic router

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3357-3365 ◽  
Author(s):  
Shaohua Dong ◽  
Qing Zhang ◽  
Guangtao Cao ◽  
Jincheng Ni ◽  
Ting Shi ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Incident Angle ◽  
Reciprocal Lattice ◽  
Plasmonic Waveguide ◽  
Optical Diffraction ◽  
Local Dynamic ◽  
Phase Gradient ◽  
On Chip ◽  
Plasmon Polaritons

AbstractPlasmons, as emerging optical diffraction-unlimited information carriers, promise the high-capacity, high-speed, and integrated photonic chips. The on-chip precise manipulations of plasmon in an arbitrary platform, whether two-dimensional (2D) or one-dimensional (1D), appears demanding but non-trivial. Here, we proposed a meta-wall, consisting of specifically designed meta-atoms, that allows the high-efficiency transformation of propagating plasmon polaritons from 2D platforms to 1D plasmonic waveguides, forming the trans-dimensional plasmonic routers. The mechanism to compensate the momentum transformation in the router can be traced via a local dynamic phase gradient of the meta-atom and reciprocal lattice vector. To demonstrate such a scheme, a directional router based on phase-gradient meta-wall is designed to couple 2D SPP to a 1D plasmonic waveguide, while a unidirectional router based on grating metawall is designed to route 2D SPP to the arbitrarily desired direction along the 1D plasmonic waveguide by changing the incident angle of 2D SPP. The on-chip routers of trans-dimensional SPP demonstrated here provide a flexible tool to manipulate propagation of surface plasmon polaritons (SPPs) and may pave the way for designing integrated plasmonic network and devices.

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