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

scholarly journals Minimum Quantity Lubrication in Cold Work Drawing Process: Effects on Forming Load and Surface Roughness

2013 ◽  
Vol 68 ◽  
pp. 639-646 ◽  
Author(s):  
S.M. Hafis ◽  
M.J.M. Ridzuan ◽  
Alina Rahayu Mohamed ◽  
R.N. Farahana ◽  
S. Syahrullail
Keyword(s):  
Surface Roughness ◽  
Cold Work ◽  
Minimum Quantity Lubrication ◽  
Drawing Process ◽  
Minimum Quantity ◽  
Forming Load ◽  
Process Effects

Effect of Surface Roughness of Pure Aluminium A1100 on the Cold Work Extrusion by Using Different Angles of Taper Die

2013 ◽  
Vol 594-595 ◽  
pp. 546-550 ◽  
Author(s):  
Mohd Jamir Mohd Ridzuan ◽  
Mohd Bin Sulaiman Hafis ◽  
K. Azduwin ◽  
A.R. Mohamed ◽  
S.N. Fitriah ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Cold Work ◽  
Testing Machine ◽  
Extrusion Process ◽  
Pure Aluminium ◽  
Bio Oil ◽  
Different Types ◽  
Materials Used ◽  
Taper Die ◽  
Effect Of Surface

The study presented in this paper is focused on the effect of surfaces roughness of pure aluminium A1100 on the cold work extrusion process by three different angles of taper die. Different angles of taper die will affect the surface roughness of the workpiece. To protect the surface and to reduce friction, lubricants are often used in extrusion process [1]. Different lubricants may have different optimum taper die angle that are suitable to be applied. Two types of materials used in this experiment are steel SKD 11 for taper die and aluminium A1100 for workpiece and different angles applied are 30o, 45o, and 60o. Moreover, with respect to each angle, three different types of lubricants were used which are Daphne Draw S Series, Palm Olein, and EFB bio oil. The Universal Testing Machine and Surface Roughness Tester were used in this experiment. The result obtained from the experiment shows that at 30o of taper die angle were producing the smooth product surfaces for each lubricant and Daphne Draw S Series could reduce the surface roughness compared to other lubricant test.

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

GPR and RVM-Based Predictions of Surface and Hole Quality in Drilling of AISI D2 Cold Work Tool Steel

2015 ◽  
pp. 736-762
Author(s):  
Pijush Samui ◽  
H. Yildirim Dalkilic
Keyword(s):  
Surface Roughness ◽  
Tool Steel ◽  
Basis Function ◽  
Feed Rate ◽  
Cold Work ◽  
Cutting Speed ◽  
Hole Quality ◽  
Roundness Error ◽  
Aisi D2 ◽  
Cold Work Tool Steel

This chapter examines the capability of Gaussian Process Regression (GPR) and Relevance Vector Machine (RVM) for prediction of surface and hole quality in drilling of AISI D2 cold work tool steel. This chapter uses GPR and RVM as regression techniques. The database contains information about cutting tool, feed rate, cutting speed, surface roughness, and roundness error. Cutting tool, feed rate, and cutting speed are considered inputs of GPR and RVM. The outputs of GPR and RVM are surface roughness and roundness error. In RVM, radial basis function is adopted as kernel function. GPR uses radial basis function as covariance function. The obtained variance can be used to determine uncertainty. A sensitivity analysis is also carried out. This chapter gives robust models based on RVM and GPR for prediction of surface and hole quality in drilling of AISI D2 cold work tool steel.

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

scholarly journals Tribological Behavior of Tool Steel Substrate and Solid Films against 304 BA Austenitic Stainless Steel under Dry Sliding

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Natchanun Angsuseranee ◽  
Bhadpiroon Watcharasresomroeng ◽  
Pracha Bunyawanichkul ◽  
Siradej Chartniyom
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Contact Pressure ◽  
Tool Steel ◽  
Tribological Behavior ◽  
Cold Work ◽  
Tool Material ◽  
Sliding Velocity ◽  
Workpiece Material ◽  
Tool Surface

The objective of this work is to study the tribological behavior of the contacting surfaces of SKD11 grade hardened cold work tool steel against grade SUS304BA austenitic stainless steel. DLC, CrN, TiN, and TiCN films were coated on the surface of the tool material to test the tribological performance. Simulation testing with a pin-on-disk was used in this study. The study was done under dry conditions with sliding velocities at 50, 100, and 150 mm/s and contact pressures of 807, 1095, and 1280 MPa. The results show that the main problem is the adhesion of the workpiece material on the tool surface. The severity of the adhesion from the workpiece material is proportional to the sliding velocity and the contact pressure between the contacting surfaces. The coefficient of friction between the contacting surfaces has a positive relationship with the adhesion occurring on the tool surface. The hardness of the film coating is useful for preventing wear of the tool material, especially under high pressure between the contacting surfaces. However, it does not prevent the adhesion of workpiece material of low sliding velocity and low contact pressure conditions. Noncoated SKD11 tool steel has better effectiveness of adhesion performance than CrN, TiN, and TiCN film coatings.

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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