Effect of grinding fluid supply on workpiece temperature in continuous generating grinding

2020 ◽  
Vol 60 ◽  
pp. 410-417
Author(s):  
Toru Kizaki ◽  
Keijiro Takahashi ◽  
Toshifumi Katsuma ◽  
Junichi Tanaka ◽  
Liming Shu ◽  
...  
Keyword(s):  
Workpiece Temperature ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
Generating Grinding

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.

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.

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.

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

Improvement of Grinding Performance of a CBN Wheel Using a New Grinding-Fluid-Supply System

2011 ◽  
Vol 325 ◽  
pp. 219-224
Author(s):  
Takayuki Kitajima ◽  
Shigeki Okuyama ◽  
Akinori Yui
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Major Effect ◽  
Supply System ◽  
Minor Effect ◽  
Cbn Wheel ◽  
Grinding Performance ◽  
Grinding Fluid ◽  
Fluid Supply ◽  
Grinding Conditions

This paper proposes a new grinding-fluid-supply system for improving the grinding performance of a CBN wheel. The system generates cavitations in the fluid flow, which is expected to provide higher cooling and superior grinding-chip removal capability. The system is applied to one-pass surface grinding of steel plates, and residual stress and surface roughness are evaluated. The system has a major effect on improving surface roughness, but has a minor effect on reducing the residual stress under shallow-cut grinding conditions. The effects appear greater under the heavier grinding conditions.

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

Thermal Aspects of Grinding: Heat Transfer to Workpiece, Wheel, and Fluid

1991 ◽  
Vol 113 (2) ◽  
pp. 296-303 ◽  
Author(s):  
A. S. Lavine ◽  
T.-C. Jen
Keyword(s):  
Heat Transfer ◽  
Convection Coefficient ◽  
Workpiece Temperature ◽  
Abrasive Grains ◽  
Grinding Parameters ◽  
Grinding Fluid ◽  
Grinding Power

A model of heat transfer in grinding has been developed that considers heat removed from the grinding zone by the workpiece, abrasive grains, and grinding fluid. This model eliminates the need to specify the fraction of the total grinding power that enters the workpiece, or the convection coefficient due to the grinding fluid. The dependence of the workpiece temperature on the various grinding parameters has been explored.

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