scholarly journals Effects of the micro groove arrays formed on the tool surface and viscosity of lubricant on surface roughness of aluminum product in cold extrusion

2009 ◽  
Vol 59 (7) ◽  
pp. 339-343 ◽  
Author(s):  
Shunpei Kamitani ◽  
Kenji Nakanishi ◽  
Taiki Hibarino ◽  
Masatoshi Ozaki
Keyword(s):  
Surface Roughness ◽  
Cold Extrusion ◽  
Tool Surface

The Effect of Tool Surface Roughness in Cold Work Extrusion

2011 ◽  
Vol 11 (2) ◽  
pp. 367-372 ◽  
Author(s):  
S. Syahrullai ◽  
C.S.N. Azwadi ◽  
M.R. Abdul Kadi ◽  
N.E.A. Shafie
Keyword(s):  
Surface Roughness ◽  
Cold Work ◽  
Tool Surface

Effect of Cutting Parameters on Surface Roughness When Milling Hardened AISI D2 Steel (56 HRC) Using Taguchi Techniques

2012 ◽  
Author(s):  
Ahmed Zaidan Mohammed Shammari ◽  
Kamal Ati Amwead ◽  
Auday Shaker Hadi
Keyword(s):  
Surface Roughness ◽  
End Milling ◽  
Signal To Noise Ratio ◽  
Cutting Parameters ◽  
Spindle Speed ◽  
Cold Extrusion ◽  
Depth Of Cut ◽  
Control Factors ◽  
Aisi D2 ◽  
Steel Aisi

The tool steel identifying AISI D2 is commonly used for cold working operations, such as sheet metal forming, cold extrusion and forging operation. To perform in these applications, they must have excellent strength, hardness, and wear resistance. The aim of the present study is to find optimal process parameters for end milling of hardened steel AISI D2 (56 HRC) using Taguchi method. A L25 array, Taguchi’s signal-to-noise ratio and ANOVA are employed to determine effects of many control factors (spindle speed, feed rate, and depth of cut) on surface roughness. In this paper, results show that the spindle speed is most influencing parameters.

Study on Causes of Material Plastic Side Flow in Precision Hard Cutting Process

2010 ◽  
Vol 97-101 ◽  
pp. 1875-1878
Author(s):  
Guang Jun Chen ◽  
Xian Li Liu ◽  
Cai Xu Yue
Keyword(s):  
Surface Roughness ◽  
Cutting Process ◽  
Surface Plastic ◽  
Forming Mechanism ◽  
Strip Edge ◽  
Tool Surface ◽  
Cutting Experiment ◽  
Side Flow ◽  
The Mathematical Model ◽  
Hard Cutting

There are many special cutting disciplines needed to research in precision hard cutting process. The plastic side flow on machining surface influences machining surface roughness great. The mathematical model of hump height for surface plastic side flow is built based on the model of precision hard cutting and forming mechanism of surface plastic side flow is analyzed. Effect of cutting feed on the maximum scallop height of machining surface is researched and microscopic observation of surface topography is made through the hard cutting experiment. In certain conditions, the machining surface roughness and the cutting off trace increase with cutting feed. Because of the metal softening, some metal which formed side flow fall off immediately but make plastic flow on the strip edge of machining surface when it flows out tool surface. This research supplied theoretical basis for prediction of hard cutting process surface quality.

scholarly journals Effect of Tool Surface Roughness on Friction Behaviorof Lubricant Coating in Cold Forging

2010 ◽  
Vol 51 (591) ◽  
pp. 342-347 ◽  
Author(s):  
Shinobu KOMIYAMA ◽  
Zhigang WANG ◽  
Ryuichi TOKUNAGA ◽  
Yuichi YAMAOKA
Keyword(s):  
Surface Roughness ◽  
Cold Forging ◽  
Lubricant Coating ◽  
Tool Surface

Micro-SACE scanning process with different tool-surface roughness

2020 ◽  
Vol 35 (11) ◽  
pp. 1181-1187
Author(s):  
Yubin Pu ◽  
Hao Tong ◽  
Junjie Li ◽  
Yong Li ◽  
Bolin Ji
Keyword(s):  
Surface Roughness ◽  
Scanning Process ◽  
Tool Surface

Lubricating Performance of Residual Zinc Phosphate Coating on Forged Specimen in Bowden-Leben Sliding Test

2018 ◽  
Vol 767 ◽  
pp. 124-130 ◽  
Author(s):  
Osamu Kada ◽  
Zhi Gang Wang
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Zinc Phosphate ◽  
Cold Forging ◽  
Phosphate Coating ◽  
Specimen Temperature ◽  
Tool Surface ◽  
Residual Thickness ◽  
Surface Expansion ◽  
Sliding Test

The lubricating performance of the zinc phosphate coating employed generally in cold forging is evaluated with Bowden-Leben sliding test by changing friction conditions such as the coating thickness, specimen temperature, the tool surface roughness, contact pressure and sliding speed. A specimen for the friction test is prepared from the inner surface of an extruded square cup and the residual thickness of the lubrication coating on the specimen is controlled by using the surface expansion in forward extrusion of the cup. Experimental results showed that the specimen temperature has the strongest influence on the friction coefficient. With an increase of the specimen temperature, the friction coefficient gradually decreases until 473K, and then increases sharply. With an increase of the tool surface roughness, the friction coefficient increases slightly. Friction coefficient is formulated as a function of the specimen temperature and the tool surface roughness. The anti-galling ability of the coating is affected by the residual thickness of lubrication coating, the specimen temperature and the tool surface roughness.

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