scholarly journals Improvement of Grinding Fluid Supply Method in Grinding of Alumina Ceramics and Cemented Carbides with Straight Cup Diamond Wheel

2020 ◽  
Vol 67 (7) ◽  
pp. 375-380
Author(s):  
Tetsuya TASHIRO ◽  
Suguru HIROSE ◽  
Takahiko NURIYA ◽  
Shoichi MORIOKA ◽  
Junsuke FUJIWARA
Keyword(s):  
Diamond Wheel ◽  
Cemented Carbides ◽  
Alumina Ceramics ◽  
Grinding Fluid ◽  
Fluid Supply

Study on Effect of Grinding Fluid Supply Parameters on Surface Integrity in Quick-Point Grinding for Green Manufacturing

2008 ◽  
Vol 53-54 ◽  
pp. 209-214 ◽  
Author(s):  
Shi Chao Xiu ◽  
Ya Dong Gong ◽  
Guang Qi Cai
Keyword(s):  
Surface Integrity ◽  
High Speed ◽  
Point Contact ◽  
Green Manufacturing ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
High Speed Grinding ◽  
Grinding Power

In high and super-high speed grinding process, there is an airflow layer with high speed around the circle edge of the grinding wheel that hinders the grinding fluid into contact layer, namely, the air barrier effect. The speed of airflow layer is directly proportional to the square of the wheel speed. Quick-point grinding is a new type of high and super-high speed grinding process with a point contact zone and less grinding power. The edge effect of the air barrier is weakened because the thin CBN wheel is applied in the process. By the analysis of dynamic pressure and velocity distributions in the airflow layer around the wheel edge, the mathematic models of the flow and jet pressure of grinding fluid for effective supply in the process were established and the process of optimization calculation of the jet nozzle diameter for green manufacturing was also analyzed based on the thermodynamics and the technical character of quick-point grinding process. The quick-point grinding experiment for surface integrity influenced by grinding fluid supply parameters was performed.

Experimental Study on the Applicability of Minimum Quantity Lubricant Grinding

2010 ◽  
Vol 139-141 ◽  
pp. 1378-1383 ◽  
Author(s):  
Guang Yao Meng ◽  
Ji Wen Tan ◽  
Yi Cui
Keyword(s):  
High Speed ◽  
Green Manufacturing ◽  
Gas Barrier ◽  
Minimum Quantity ◽  
Mql Grinding ◽  
Grinding Method ◽  
Grinding Fluid ◽  
Dry Grinding ◽  
Fluid Supply ◽  
Minimum Quantity Lubricant

Grinding is often to use the grinding fluid because of the high temperature in the grinding area. During the process of grinding, which is used traditional way of grinding fluid supply, gas barrier layer which around high-speed rotary wheel impeded effective grinding fluid into grinding zone, so it creates huge waste and pollution. Minimum quantity lubricant (MQL) grinding as a way of Green Manufacturing is proposed in recent years. So far, the problem of MQL can be applied in grinding has not been confirmed. In this paper, the applicability of MQL in grinding is studied by comparing the experiment of traditional grinding fluid supply method, minimum quantity lubricant grinding method and dry grinding method, and this study is based on theoretical analysis of minimum quantity lubricant grinding.

Grinding Performance of a Grain-Arranged Diamond Wheel against Industrial Pure Aluminum

2007 ◽  
Vol 329 ◽  
pp. 33-38 ◽  
Author(s):  
Shigeki Okuyama ◽  
Takayuki Kitajima ◽  
Akinori Yui
Keyword(s):  
Pure Aluminum ◽  
Diamond Wheel ◽  
General Purpose ◽  
Surface Grinding ◽  
Mirror Surface ◽  
Fluid Type ◽  
Wheel Wear ◽  
Grinding Performance ◽  
Grinding Fluid ◽  
Table Speed

A grain-arranged diamond wheel is developed and grinding performance of the wheel against industrial pure aluminum, one of the most hard-to-grinding materials, is investigated. The developed wheel efficiently ground pure aluminum without adhesion even when general-purpose grinding fluid, Type A3-1, was used. Moreover, wheel wear was not observed during the experiment, and grinding energy was extremely low. By using the developed wheel, a mirror surface can be easily obtained by one-pass surface grinding with very low table speed.

Surface Characteristics with Curved Grinding of a Titanium Alloy with Coolant Supplied from the Inner Side of the Grinding Wheel

2019 ◽  
Vol 825 ◽  
pp. 84-91
Author(s):  
Sumito Toyokawa ◽  
Nakatsuka Nagatoshi ◽  
Atsushi Kusakabe ◽  
Hiroyuki Sasahara
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Convex Surface ◽  
Surface Characteristics ◽  
Grinding Wheel ◽  
Surface Machining ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
The Difference ◽  
The One

The objective of this paper is to clarify the effect of the difference of grinding fluid supply method on grinding surface characteristics during the curved surface machining of titanium alloy. The convex and concave type workpieces were machined by internal coolant supply and external coolant supply, and the surface characteristics were compared. The internal coolant supply could supply the grinding fluid directly to the machining point through the grinding wheel pores. One nozzle or seven nozzles were used for external coolant supply. As a result, the surface roughness of the concave surface decreased by about 10 % compared with the one nozzle was used when the grinding fluid was supplied from the inner side of the grinding wheel. In the case of the convex surface, the surface roughness decreased about 20 % compared with the single nozzle was used, and it decreased about 9 % compared with the seven nozzles were used.

Grinding Performance of a Grain-Arranged Diamond Wheel against Aluminum Alloys and Ti6Al4V

2010 ◽  
Vol 126-128 ◽  
pp. 107-112
Author(s):  
Shigeki Okuyama ◽  
Akinori Yui ◽  
Takayuki Kitajima
Keyword(s):  
Aluminum Alloys ◽  
Mesh Size ◽  
Diamond Wheel ◽  
Grinding Wheel ◽  
Minor Effect ◽  
Grinding Performance ◽  
Grinding Fluid ◽  
Finished Surface ◽  
Titanium Alloy Ti6al4v ◽  
A Minor

A grain-arranged diamond wheel was developed and grinding performance of the wheel against aluminum alloys and titanium alloy, Ti6Al4V, has been investigated using various kinds of grinding fluid. Mirror finishing of aluminum alloys was successfully performed without grinding burn when emulsion-type grinding fluid with an extreme-pressure additive was used. When oil base lubricants or a fatty acid was supplied using a MQL supply unit, fine finishing could not be done. Mesh size of the grinding wheel had only a minor effect on surface roughness. When Ti6Al4V was ground by the developed wheel, an adhesion of work material on diamond grains occurred causing the finished surface to deteriorate.

Investigation of Grinding Fluid Supply Parameters on Workpiece Surface Integrity

2014 ◽  
Vol 1017 ◽  
pp. 458-463
Author(s):  
Shi Chao Xiu ◽  
Xiu Ming Zhang ◽  
Ang Jiang ◽  
Xiao Liang Shi ◽  
Shu Jun Li ◽  
...  
Keyword(s):  
Surface Integrity ◽  
Flow Model ◽  
Fluid Distribution ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Two Phase ◽  
Workpiece Surface ◽  
Grinding Fluid ◽  
Parameters Selection ◽  
Fluid Supply

The grinding heat directly affected workpiece surface in the grinding process and it might produce some defects such as crack and burn. Meanwhile wear debris generated in the grinding process could easily embed grinding wheel blowhole and caused clogging and passivation. So it was particular important to avoid defects and improve the grinding workpiece surface integrity effectively. This paper established an incompressible turbulent fluid spray model based on the study of the existing airflow and the grinding fluid distribution in the grinding zone. Then according to different grinding fluid supply parameters established the two-phase gas liquid spray flow model by using CFD(computational fluid dynamics), simulated and calculated the model, compared the mass flow rate of the grinding fluid flow field with different spray distances, heights, speeds and spray angles in the grinding zone and determined the most reasonable spraying jet position. At the last, through researching on the workpiece surface integrity experiment, it provided an experimental basis to determine the most suitable spray jet position and verify the rationality of supply parameters selection.

Effect of Coolant Supplied through Grinding Wheel on Residual Stress of Grinding Surface

2014 ◽  
Vol 1017 ◽  
pp. 33-37 ◽  
Author(s):  
Nagatoshi Nakatsuka ◽  
Yudai Hirai ◽  
Atsushi Kusakabe ◽  
Yasuhiro Yao ◽  
Hiroyuki Sasahara
Keyword(s):  
Residual Stress ◽  
Compressive Residual Stress ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Internal Grinding ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
Infrared Thermograph

We explored the effect of supplying coolant from the inner side of a grinding wheel on the residual stress caused by grinding. Effect of depth of cut on grinding temperature and residual stress was also studied. Results clarified that grinding with an internal coolant supply induced a larger compressive residual stress compared to a conventional external grinding fluid supply when depth of cut was large. In addition, grinding temperature in the internal grinding fluid supply was lower than in the external grinding fluid supply, as measured by infrared thermograph camera. Findings suggested that large compressive residual stress was obtained in the case of the coolant supplied from the inner side of the grinding wheel because temperature was lower than external coolant supply.

Nozzle-Type ELID Grinding Characteristics of Cemented Carbides

2010 ◽  
Vol 126-128 ◽  
pp. 1007-1012 ◽  
Author(s):  
Shao Hui Yin ◽  
Kun Tang ◽  
Hitoshi Ohmori ◽  
Xian Liang Zeng ◽  
Feng Jun Chen ◽  
...  
Keyword(s):  
Diamond Wheel ◽  
Systematic Investigation ◽  
Cemented Carbides ◽  
Experimental Scheme ◽  
Elid Grinding ◽  
Fine Grain ◽  
Atomic Force ◽  
Material Removal Mode ◽  
Micro Morphology ◽  
Nozzle Type

This paper reports a systematic investigation of a nozzle-type ELID grinding characteristics of cemented carbides. Two groups of experimental scheme were carried on by using fine grain cast iron diamond wheel and nozzle-type ELID grinding apparatus. The grinding forces were measured by a dynamometer and the ground surfaces were characterized using scanning electron microscopy (SEM) and atomic force microscope (AFM). The influences of electrolytic and grinding parameters on grinding force were discussed. The material removal mode and micro-morphology characteristics were also analyzed.

Temperature Measurement of Surface Grinding Using a Fluid Supplying System from inside of Grinding Wheel

2012 ◽  
Vol 523-524 ◽  
pp. 125-130
Author(s):  
Zhi Li ◽  
Yasuhiro Yao ◽  
Keigo Nakae ◽  
Hiroyuki Sasahara
Keyword(s):  
Temperature Rise ◽  
Surface Grinding ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Back Side ◽  
Round Trip ◽  
Grinding Fluid ◽  
Small Depth ◽  
Fluid Supply ◽  
The Relationship

In this research, the temperature rise of the machined layer during surface grinding using a fluid supplying system from inside of grinding wheel is measured. Compared with the conventional fluid supply from an external nozzle, the grinding fluid is expected to be reached surely to the grinding point if this fluid supplying system is used. Thus the amount of supplying fluid can be reduced keeping the comparable cooling efficiency. Two or more thermocouples are continuously set to the machining layer from its back side through the small hole. Then the temperature change was measured during the continuous reciprocating grinding (round trip) with small depth of cut. As a result, even if the amount of the grinding fluid supply is decreased to 0. 5 L/min, the temperature rise in the machining layer is not very different from the case that the supplying amount is 10 L/min. In addition, by the result of the series of the experiments, the relationship between the temperature rise of the machining layer and the state of the supply of the grinding fluid and the grinding energy is inspected.

M1105 Influence of the grinding fluid supply method in grinding of Cemented carbide

2016 ◽  
Vol 2016.91 (0) ◽  
pp. 373
Author(s):  
Suguru HIROSE ◽  
Takahiko NURIYA ◽  
Tetsuya TASHIRO
Keyword(s):  
Cemented Carbide ◽  
Grinding Fluid ◽  
Fluid Supply
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