Experimental investigations into electrical discharge deep hole drilling of Inconel 718 using copper-tungsten electrode

2012 ◽  
Vol 5 (5/6) ◽  
pp. 399 ◽  
Author(s):  
P. Kuppan ◽  
S. Narayanan ◽  
A. Rajadurai
Keyword(s):  
Inconel 718 ◽  
Electrical Discharge ◽  
Hole Drilling ◽  
Experimental Investigations ◽  
Deep Hole ◽  
Tungsten Electrode ◽  
Deep Hole Drilling

scholarly journals Improving Machining Performance for Deep Hole Drilling in the Electrical Discharge Machining Process Using a Step Cylindrical Electrode

2021 ◽  
Vol 11 (5) ◽  
pp. 2084 ◽  
Author(s):  
Kamonpong Jamkamon ◽  
Pichai Janmanee
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Side Wall ◽  
Machining Process ◽  
Hole Drilling ◽  
Electrode Wear ◽  
Deep Hole ◽  
Cylindrical Electrode ◽  
Machining Performance ◽  
Deep Hole Drilling

The performance of electrical discharge machining for drilling holes decreases with machining depth because the conventional flushing and electrode cannot completely eliminate debris particles from the machining area. In this study, a modified electrode for self-flushing in the electrical discharge machining process with a step cylindrical shape was designed to improve machining performance for deep hole drilling. The experimental results of the step cylindrical electrode showed that the material removal rate increased by approximately 215.7%, 203.8%, and 130.4%, and the electrode wear ratio decreased by approximately 47.2%, 63.1%, and 37.3%, when compared with a conventional electrode for the diameters of 6, 9, and 12 mm, respectively. In addition, the gap clearance and concavity of the side wall of the drilled hole was reduced with the step cylindrical electrode. The limited high flank of the electrode led to an increase in the escape area of the debris that was partially removed from the machining area, and the limited secondary spark on the side wall of the electrode resulted in a reduction in machining time.

scholarly journals Influence of Burnishing Axial Interference on Hole Surface Quality in Deep Hole Drilling of Inconel 718

2016 ◽  
Vol 5 ◽  
pp. 1295-1307 ◽  
Author(s):  
S. Malarvizhi ◽  
Akshay Chaudhari ◽  
Keng Soon Woon ◽  
A. Senthil Kumar ◽  
Mustafizur Rahman
Keyword(s):  
Surface Quality ◽  
Inconel 718 ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling

scholarly journals IN-PROCESS MEASUREMENT AND NUMERICAL DETERMINATION OF THE TEMPERATURE IN THE CONTACT ZONE DURING SINGLE LIP DEEP HOLE DRILLING

2021 ◽  
Vol 2021 (3) ◽  
pp. 4556-4562
Author(s):  
R. Wegert ◽  
◽  
V. Guski ◽  
H. - C. Moehring ◽  
S. Schmauder ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Contact Zone ◽  
Hole Drilling ◽  
Experimental Investigations ◽  
Deep Hole ◽  
Machining Processes ◽  
German Research Foundation ◽  
Deep Hole Drilling ◽  
Process Measurement ◽  
Feed Force

In this presented work, the main objective is the in-process measurement of the thermal as-is state near the drilling contact zone by means of a sensor-integrated tool for single lip deep hole drilling (SLD). Additionally, the mechanical quantities feed force and drilling torque are evaluated. The process monitoring is essential to optimize the surface quality as well as the subsurface properties such as hardness and residual stresses. These quantities are strongly dependent on the thermo-mechanical as-is state in the cutting zone and in the contact zone between the guide pads and the drill hole surface. This contribution gives a project overview including the development of a sensor-integrated single lip deep hole driller for the in-process temperature measurement, the integration of sensor systems in the tool as well as the experimental investigations on the temperature, the feed force and the drilling torque during drilling of a 42CrMo4 steel. The temperature measurement at eleven positions in the driller head provides data to observe the heat generation, distribution, and flow independently from the workpiece characteristics. However, one of the greatest benefits is the non-destructive fashion of the measurement system with their sensor integrated in the tool and thus the reusability. A simulation method, which uses the experimental results as a reference, is used to predict the thermo-mechanical conditions in the contact zone of the drill head and the workpiece. The results of these thermo-mechanical process simulations and the validation of this applied FE approach using the measured quantities are presented, too. The results of this work are part of an interdisciplinary research project in the framework of the priority program "Surface Conditioning in Machining Processes" (SPP 2086) of the German Research Foundation (DFG).

Optimization of laser deep-hole drilling of Inconel 718 using the Taguchi method

1993 ◽  
Vol 37 (1-4) ◽  
pp. 741-757 ◽  
Author(s):  
S.C. Tam ◽  
C.Y. Yeo ◽  
S. Jana ◽  
Michael W.S. Lau ◽  
Lennie E.N. Lim ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Inconel 718 ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling
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