An experimental study on the effect of high-pressure coolant on chip fragmentation during the turning of stainless steel

2019 ◽  
Vol 105 (1-4) ◽  
pp. 905-918 ◽  
Author(s):  
Vincent Wagner ◽  
Jean-Pierre Faye ◽  
Gilles Dessein
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Stainless Steel ◽  
On Chip ◽  
High Pressure Coolant

Effect of High-Pressure Coolant Supply on Chip-Breaking and Tool Wear in Machining of Stainless Steel

2015 ◽  
Vol 656-657 ◽  
pp. 226-230 ◽  
Author(s):  
Takahiro Katoh ◽  
Shigetoshi Ohmori ◽  
Takahiro Maeda ◽  
Takanori Kakumitsu ◽  
Koichi Okuda ◽  
...  
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Tool Wear ◽  
Cutting Force ◽  
Tool Life ◽  
Flank Wear ◽  
Crater Wear ◽  
Cutting Inserts ◽  
On Chip ◽  
High Pressure Coolant

The high-pressure coolant supply cutting has attracted attention from a viewpoint of chip evacuation and tool life. In this study, the influence of high-pressure coolant supply on chip shape, cutting force and tool wear were investigated. The tests were carried out during external turning of stainless steel with cemented carbide cutting inserts. The results suggest that the length and radius of the chips got shorter with high-pressure coolant supply, especially supply pressure more than 5MPa. The cutting force was increase slightly with high-pressure coolant supply. However the thrust force was decrease. The uniform flank wear and crater wear were reduced and tool life was improved by high-pressure coolant supply.

Experimental Study on Burning Process and Characteristic of Sodium Columnar Fire

2014 ◽  
Author(s):  
Ye-xin Tang ◽  
Zhi-gang Zhang ◽  
Ming Guo ◽  
Shu-bin Sun
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Stainless Steel ◽  
Temperature Field ◽  
Liquid Sodium ◽  
Maximum Temperature ◽  
Radial Temperature ◽  
Burning Process ◽  
Short Time ◽  
Hydrodynamic Effects

A variety of sodium fire generated by the leakage of liquid sodium in the FBR is common. This paper focuses on the burning process and characteristics of sodium fire in a columnar flow. About 290°C liquid sodium was injected into a 7.9 m3 stainless steel cylindrical combustion space to shape the sodium columnar fire by 0.2 MPa high pressure nitrogen. The data of temperature field for the study of burning characteristic of sodium columnar fire have been collected by the temperature acquisition system located in the combustion space. The sodium flow maintains the columnar shape at first, and disperses by hydrodynamic effects on its way down. About 64s after the initiating time of sodium ejection for this experiment, the maximum temperature of the area close to the ejection center reaches over 1200°C. And the maximum temperature appears at the space of 1–1.5m from the plate. But the high temperature lasts for a short time and reduces rapidly. The radial temperature of the area far from the sodium flow is relatively low and generally about 200°C, and maximally about 350 °C. This study is helpful to evaluate the combustion characteristics and burning process of the sodium fire in the sodium-related facilities.

Influence of Cutting Fluid Conditions and Cutting Parameters on the Chip Form in Turning of Titanium and Steel Alloys

2016 ◽  
Vol 686 ◽  
pp. 74-79
Author(s):  
Bogdan Słodki ◽  
Grzegorz Struzikiewicz ◽  
Łukasz Ślusarczyk
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Cutting Parameters ◽  
Cutting Fluid ◽  
Carbide Tool ◽  
Steel Alloys ◽  
Form Analysis ◽  
Sintered Carbide ◽  
High Pressure Coolant ◽  
Coolant System

The paper presents the results of turning tests of Ti6Al4V alloy with a sintered carbide tool. For selected sets of cutting data, two kinds of coolant supply were compared. Conventional coolant supply with the pressure of 7 bar was compared with HPC (High - Pressure Coolant) system working with the pressure of 70 bar. The tests revealed the fact that HPC system is useful for small values of feed taking into account chip form. Photographs of chips and their form analysis are presented. The results of tests performed by Sandvik Coromant concerning turning stainless steel were compared and discussed.

Experimental Study on High-Pressure Fog Cooling Systems in Greenhouses

2013 ◽  
Vol 475-476 ◽  
pp. 1410-1413
Author(s):  
De Ling Zhao
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Stainless Steel ◽  
Wind Velocity ◽  
Droplet Size ◽  
Cooling System ◽  
Water Pressure ◽  
Cooling Systems

This paper describes the study of High-Pressure Fogging Cooling Systems. A new ruby-orifice nozzle is designed because of the inefficiency of the stainless steel-orifice nozzle which wear out easily and expensive in service at present. The characteristic of the new nozzle is analyzed and the fog droplet size of the new nozzle is measured by MPA Malvern Particle Analyzer. The diameter of droplet size (VMD ) which is 500 mm far from the nozzle is less than 30μm when the water pressure in the pipe is more than 5 MPa. In addition, a high-pressure fog cooling system is designed and is conducted in a greenhouse of 6 by 30 meter. The study shows: the high-pressure fog cooling system is efficient on some conditions of requiring a certain wind velocity and a certain humidity outside in open greenhouses.

scholarly journals Study on chip fragmentation and hole quality in drilling of aluminium 6061 alloy with high pressure internal cooling

2019 ◽  
Vol 299 ◽  
pp. 04014 ◽  
Author(s):  
Ioan Alexandru Popan ◽  
Alina Ioana Popan ◽  
Alexandru Carean ◽  
Domnita Fratila ◽  
Adrian Trif
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Process Parameters ◽  
Hole Drilling ◽  
Drilling Process ◽  
Internal Cooling ◽  
Hole Quality ◽  
High Quality ◽  
Chip Shape ◽  
On Chip

The drilling process is one of the most common processes on many manufacturing areas. It is used for high-quality hole drilling of Aluminium 6061 alloy. In this experimental study precise holes were drilled, using drills with high pressure internal cooling (50 Bar). The influence of the process parameters on holes quality is analysed. Another aspect studied is chip shape and evacuation.

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