Cutting Tool Edge Temperature in Finish Hard Turning of Case Hardened Steel

2009 ◽  
Vol 407-408 ◽  
pp. 538-541 ◽  
Author(s):  
Ryutaro Tanaka ◽  
Hiroki Morishita ◽  
Yong Chuan Lin ◽  
Akira Hosokawa ◽  
Takashi Ueda ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
White Layer ◽  
Cutting Speed ◽  
Hardened Steel ◽  
Cutting Test ◽  
Tool Edge ◽  
Cutting Insert ◽  
Finish Hard Turning ◽  
Lower Tool ◽  
Edge Temperature

This study deals with the influence of tool characteristics on the cutting edge temperature in turning case hardened steel. The cutting test is undertaken with the inserts which have different thermal conductivity and coating layer. The tool edge temperature is measured with a two-color pyrometer. The tool edge temperature increases with the increase in cutting speed. The higher thermal conductivity cutting insert causes lower tool edge temperature. The coating hardly affects the tool edge temperature. The white layer thickness increases with increasing cutting speed reaching a maximum at certain cutting speed and decreases with cutting speed.

scholarly journals Effects of Tool Edge Geometry on Cutting Temperature in Continuous Cutting of Case Hardened Steel

2013 ◽  
Vol 7 (3) ◽  
pp. 313-320 ◽  
Author(s):  
Ryutaro Tanaka ◽  
◽  
Akira Hosokawa ◽  
Tatsuaki Furumoto ◽  
Takashi Ueda ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Flank Wear ◽  
Cutting Temperature ◽  
Hardened Steel ◽  
Nose Radius ◽  
Edge Geometry ◽  
Tool Edge ◽  
Edge Temperature ◽  
Color Pyrometer

This study was conducted to investigate the effects of tool edge geometry on cutting temperature in the continuous cutting of case hardened steel. The tool edge temperature was measured using a two-color pyrometer with an optical fiber. The tool flank temperature increased with the negative land angle. When the flank wear VB was 0.05 mm, the tool flank temperature was only a little higher than with a new insert. However, when the flank wear VB was 0.1 mm, the tool flank temperature was dramatically higher. A horned insert resulted in higher tool flank temperature than when an insert without a horned edge was used. The tendency was remarkable at larger negative land angles and wider flank wear widths. Tool flank temperature increased with an increase in the nose radius of inserts. When comparing inserts with the same nose radius, the insert with the wiper edge caused higher tool flank temperatures than did the insert without the wiper edge.

Relationship between Cutting Heat and Tool Edge Temperature in End Milling of Titanium Alloy

2017 ◽  
Vol 749 ◽  
pp. 15-20
Author(s):  
Yosuke Araki ◽  
Ryutaro Tanaka ◽  
Yuto Kojima ◽  
Katsuhiko Sekiya ◽  
Keiji Yamada ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Optical Fiber ◽  
End Milling ◽  
Cutting Condition ◽  
Dry Cutting ◽  
Cutting Heat ◽  
Tool Edge ◽  
Lower Tool ◽  
Edge Temperature ◽  
Color Pyrometer

In this study, tool edge temperature was measured by a two-color pyrometer with an optional fiber. During one revolution of spindle, the tool edge passes over the fine hole at workpiece after cutting workpiece. An optical fiber inserted into the fine hole transmits infrared ray radiated from tool edge to two detectors with different spectral sensitivities. One peak signal from each detector can be obtained by each spindle revolution. The tool edge temperature can be calculated by taking the ratio of outputs from these two detectors. The relation between cutting heat calculated from cutting force and tool edge temperature was discussed. The tool edge temperature at the same cutting heat could be compared. The wet cutting condition caused lower tool edge temperature than the others at the same cutting heat. MQL and dry showed almost same tool edge temperature. The dispersion of tool edge temperature in wet cutting is wider than that in dry cutting and MQL cutting.

A Comprehensive Study on Surface Roughness in Machining of AISI D2 Hardened Steel

2012 ◽  
Vol 576 ◽  
pp. 60-63 ◽  
Author(s):  
N.A.H. Jasni ◽  
Mohd Amri Lajis
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
End Milling ◽  
Cutting Speed ◽  
Hardened Steel ◽  
Depth Of Cut ◽  
Feed Speed ◽  
Radial Depth ◽  
Aisi D2 ◽  
Coated Carbide

Hard milling of hardened steel has wide application in mould and die industries. However, milling induced surface finish has received little attention. An experimental investigation is conducted to comprehensively characterize the surface roughness of AISI D2 hardened steel (58-62 HRC) in end milling operation using TiAlN/AlCrN multilayer coated carbide. Surface roughness (Ra) was examined at different cutting speed (v) and radial depth of cut (dr) while the measurement was taken in feed speed, Vf and cutting speed, Vc directions. The experimental results show that the milled surface is anisotropic in nature. Surface roughness values in feed speed direction do not appear to correspond to any definite pattern in relation to cutting speed, while it increases with radial depth-of-cut within the range 0.13-0.24 µm. In cutting speed direction, surface roughness value decreases in the high speed range, while it increases in the high radial depth of cut. Radial depth of cut is the most influencing parameter in surface roughness followed by cutting speed.

Simulation of Meso-Scale Machining of AISI1045 Based on Multiphase Model

2016 ◽  
Vol 836-837 ◽  
pp. 374-380
Author(s):  
Teng Yi Shang ◽  
Li Jing Xie ◽  
Xiao Lei Chen ◽  
Yu Qin ◽  
Tie Fu
Keyword(s):  
Cutting Force ◽  
Cutting Process ◽  
Multiphase Model ◽  
Tool Edge Radius ◽  
Edge Radius ◽  
Tool Edge ◽  
Cutting Insert ◽  
Multiphase Models ◽  
Hot Rolled ◽  
Meso Scale

In the meso-scale machining, feed rate, grain size and tool edge radius are in the same order of magnitude, and cutting process is often carried out in the grain interior and grain boundary. In this paper the meso-cutting process of hot-rolled AISI1045 steel is studied and its metallographic microstructure is analyzed for the establishment of multiphase models which incorporate the effect of ferrite and pearlite grains. In order to discover the applicability of multiphase models to the simulation of meso-cutting, three contrast simulation models including multiphase model with rounded-edge cutting insert (model I), multiphase model with sharp edge cutting insert (model II) and equivalent homogeneous material model with rounded-edge cutting insert (model III) are built up for the meso-orthogonal cutting processes of hot-rolled AISI1045. By comparison with the experiments in terms of chip morphology, cutting force and specific cutting force, the most suitable model is identified. Then the stress distiribution is analyzed. And it is found that multiphase model with tool edge radius can give a more accurate prediction of the global variables and reveal more about these important local variables distribution.

Built-up Edge Elimination in Mirror Cutting of Hardened Steel

1995 ◽  
Vol 117 (1) ◽  
pp. 62-66 ◽  
Author(s):  
K. Oishi
Keyword(s):  
Cutting Speed ◽  
Critical Value ◽  
Hardened Steel ◽  
Hard Work ◽  
New Method ◽  
Work Material ◽  
Face Temperature

A built-up edge will normally give a poor finish. The conventional way of eliminating the built-up edge is to increase cutting speed and feed (i.e., increase tool face temperature). It is shown here that a built-up edge can also be eliminated if the workpiece hardness is above a critical value. This critical value is such that the workpiece hardness be somewhat greater than half the hardness of the built-up edge that forms at low hardness and speed, since the built-up edge hardness is between 2 and 3 times the corresponding workpiece hardness. It is suggested the reason for this is that the hardness of the workpiece must be less than the hardness of the built-up edge, otherwise the built-up edge disappears. This new method of eliminating the built-up edge by use of hard work material prevents built-up edge formation even at low feeds and speeds, thus making it possible to produce extremely a good (mirror) finish under these conditions.

Research on Water Cut of Silicon Steel Plate

2012 ◽  
Vol 503-504 ◽  
pp. 367-369
Author(s):  
Geng Wu Liu
Keyword(s):  
Steel Plate ◽  
Water Pressure ◽  
Cutting Speed ◽  
Silicon Steel ◽  
Cutting Test ◽  
Water Cutting ◽  
Water Cut ◽  
Magnetic Conductivity ◽  
Main Material

Silicon steel plate is main material of motor and transformer , and was always used die for its production . Through water cutting test , the cutting speed of beeline and arc and water pressure was adjusted , the water cutting technology was mastered . The quality of production such as dimension , burr height was controlled well . The cut area was not rust because of using dry technology and the magnetic conductivity was not affected using water cutting . It will provides a speediness way for silicon steel plate production .

Characterisation, Performance and Optimisation of Nanocellulose Metalworking Fluid (MWF) for Green Machining Process

2021 ◽  
Vol 18 (4) ◽  
pp. 9188-9207
Author(s):  
Mahendran Samykano ◽  
J. Kananathan ◽  
K. Kadirgama ◽  
A. K. Amirruddin ◽  
D. Ramasamy ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Roughness ◽  
Tool Wear ◽  
Feed Rate ◽  
Cutting Speed ◽  
Machining Process ◽  
Alumina Nanoparticles ◽  
Working Fluid ◽  
Depth Of Cut ◽  
Nanoparticle Concentration

The present research attempts to develop a hybrid coolant by mixing alumina nanoparticles with cellulose nanocrystal (CNC) into ethylene glycol-water (60:40) and investigate the viability of formulated hybrid nanocoolant (CNC-Al2O3-EG-Water) towards enhancing the machining behavior. The two-step method has been adapted to develop the hybrid nanocoolant at various volume concentrations (0.1, 0.5, and 0.9%). Results indicated a significant enhancement in thermal properties and tribological behaviour of the developed hybrid coolant. The thermal conductivity improved by 20-25% compared to the metal working fluid (MWF) with thermal conductivity of 0.55 W/m℃. Besides, a reduction in wear and friction coefficient was observed with the escalation in the nanoparticle concentration. The machining performance of the developed hybrid coolant was evaluated using Minimum Quantity Lubrication (MQL) in the turning of mild steel. A regression model was developed to assess the deviations in the tool flank wear and surface roughness in terms of feed, cutting speed, depth of the cut, and nanoparticle concentration using Response Surface Methodology (RSM). The mathematical modeling shows that cutting speed has the most significant impact on surface roughness and tool wear, followed by feed rate. The depth of cut does not affect surface roughness or tool wear. Surface roughness achieved 24% reduction, 39% enhancement in tool length of cut, and 33.33% improvement in tool life span. From this, the surface roughness was primarily affected by spindle cutting speed, feed rate, and then cutting depth while utilising either conventional water or composite nanofluid as a coolant. The developed hybrid coolant manifestly improved the machining behaviour.

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