Response Surface Methodology Modeling of Drill Exiting Damage Factor in High Speed Drilling of GFRP Using HSS Twist Drill Bit

2015 ◽  
Vol 786 ◽  
pp. 323-327
Author(s):  
Tze Keong Woo ◽  
Faiz Ahmad ◽  
Safian Sharif
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
High Speed ◽  
High Speed Steel ◽  
Drill Bit ◽  
Twist Drill ◽  
Damage Factor ◽  
Glass Fiber Reinforced ◽  
Drilling Parameters ◽  
High Speed Drilling

This paper presents a research on experimental and response surface methodology (RSM) approach in evaluating the damage factor of the drilled holes in high speed drilling of glass fiber reinforced polymer (GFRP). From the experiment, the influences of drilling parameters toward damage factor are more prominent in thicker GFRP; where high speed drilling using high speed steel twist drill bit produces lower damage factor in thicker GFRP. Lastly an optimized set of drilling parameters was generated for the use of high speed steel twist drill bit in high speed drilling.

Analysis and modeling of delamination factor in drilling glass fiber reinforced plastic using response surface methodology

2010 ◽  
Vol 45 (6) ◽  
pp. 727-736 ◽  
Author(s):  
Erol Kilickap
Keyword(s):  
Response Surface Methodology ◽  
Glass Fiber ◽  
Response Surface ◽  
Gfrp Composites ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Delamination Factor ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Drilling Parameters

This study, through a new approach, presents a comprehensive mathematical model for correlating the interactive and higher order influences of drilling parameters on the delamination factor in drilling glass fiber reinforced plastic (GFRP) composites using response surface methodology. The purpose of this article is to investigate the influence of drilling parameters, such as cutting speed, feed, and point angle on delamination produced when drilling GFRP composite. The damage generated associated with drilling GFRP composites were observed, both at the entrance and exit during the drilling. The experiments are conducted based on Box—Behnken design. Empirical models are developed to correlate and predict the drilling parameters and delamination factor in drilling of GFRP. The developed models for delamination factor at entrance and exit are proposed that agree well with the experiment. The models can be utilized to select the level of drilling parameters. Thus time and cost were noticeably reduced.

Drilling Force and Temperature of Bone by Surgical Drill

2010 ◽  
Vol 126-128 ◽  
pp. 779-784 ◽  
Author(s):  
Yi Xin Yang ◽  
Cheng Yong Wang ◽  
Zhe Qin ◽  
Lin Lin Xu ◽  
Yue Xian Song ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Feed Rate ◽  
High Speed ◽  
Drill Bit ◽  
Twist Drill ◽  
Drilling Speed ◽  
Drilling Force ◽  
Drilling Depth ◽  
High Speed Drilling ◽  
Lower Temperature

Drilling force and temperature of tibia at the high speed drilling for improving the design of surgical drills are very important. In this paper we describe experiments using pig tibia bones, measuring the drilling force and temperature of a new design of drill bit and compare the results against a twist drill. The result shows that the drilling force and temperature are affected by the feed rate and drilling speed, which vary with the drilling depth into the bone. The new surgical drill with three top cutting edges can achieve lower temperature below 47oC and lower drilling force than with the stainless steel twist drill and carbide twist drill.

scholarly journals Thermal Investigation on Coated and Uncoated HSS Twist Drill using ANSYS Software

2021 ◽  
Vol 9 (12) ◽  
pp. 2032-2039
Author(s):  
Bhagyashri Dilip Chaudhari
Keyword(s):  
Thermal Analysis ◽  
Mild Steel ◽  
High Speed ◽  
High Speed Steel ◽  
Depth Of Cut ◽  
Drill Bit ◽  
Twist Drill ◽  
Ansys Software ◽  
Drilling Operation ◽  
Average Rise

Abstract: In drilling, a cylindrical hole is produced in workpiece, removing the material inside the workpiece. The cutting tool used in drilling operation is called ‘Twist Drill’; it rotates and allows the material to be removed from the workpiece in the form of chips and thus drill the hole. Cutting fluids or coolants are used to perform this operation smoothly. The coating on the drill bits helps to reduce friction in the cut and the heat buildup in the drill bit. Coating also helps in protecting against corrosion. The present work focuses on the features of uncoated High Speed Steel (HSS) Twist Drill bit and Titanium Nitride (TiN) and Titanium Aluminium Nitride (TiAlN) coated on HSS Drills. The workpiece material was Mild Steel and the drilling operation was done using normal machining condition i.e. in presence of coolant. The cutting parameters used are cutting speed (35.5 m / min), spindle speed (1500 rpm), feed rate (0.2 mm / rev.), depth of cut (10 mm). These parameters were kept constant. Temperatures were measured with the help of thermal imaging camera and with the help of ANSYS software thermal analysis were done. Experimental results showed that the average rise in temperature of uncoated HSS tool was higher as compared to TiN coated and TiAlN coated HSS tools. TiAlN coated drills showed the least average rise in temperature. Keywords: High Speed Steel (HSS) Drill, TiN and TiAlN Coated HSS Twist Drill, Mild Steel (MS), Thermal Analysis, ANSYS Software.

Roundness Error Evaluation in Drilling of Glass Fiber Reinforced Polypropylene (GFR/PP) Composites Using Box Behnken Design (BBD)

2015 ◽  
Vol 766-767 ◽  
pp. 844-851
Author(s):  
T. Srinivasan ◽  
K. Palanikumar ◽  
K. Rajagopal
Keyword(s):  
Glass Fiber ◽  
Response Surface ◽  
Drill Bit ◽  
Fiber Reinforced ◽  
Box Behnken Design ◽  
Roundness Error ◽  
Glass Fiber Reinforced ◽  
Drilling Parameters ◽  
Solid Carbide ◽  
Measuring Machine

In this paper, the damage of drilling parameters on roundness error is investigated in drilling of Glass Fiber Reinforced Polypropylene (GFR/PP) matrix composites with ‘Brad and Spur’ drill bit. The experiment is carried out using Solid Carbide drill bit and L27 orthogonal array is used to analyze the effect of spindle speed, feed rate and drill diameter. A complete and in-detail evaluation and optimization of cutting parameter using Box-Behnken Design (BBD) technique is carried out. The design is contributed for quality and productivity equally and analysis of the drilling parameters. The roundness error is determined using response surface methodology (RSM) and Analysis of variance (ANOVA) which is used for analyzing the output results. One of the most important ovalty damage to be controlled on a cylindrical drilled part is the roundness error. The Co-ordinate Measuring Machine (CMM) is the general metrological equipment used for inspection of roundness error which is normally performed in a quality room. The results indicated that the model can be effectively used for predicting the response variable by means of which roundness error can be controlled. 3-D response surface graphs are developed to study the effect of drilling parameters with roundness error and presented in detail.

New Experiments on the Temperature Distribution in Drilling

1984 ◽  
Vol 106 (3) ◽  
pp. 242-247 ◽  
Author(s):  
A. Thangaraj ◽  
P. K. Wright ◽  
M. Nissle
Keyword(s):  
Temperature Distribution ◽  
High Speed ◽  
Metal Flow ◽  
High Speed Steel ◽  
Twist Drill ◽  
Temperature Distributions ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Twist Drills

Using metallographic and microhardness techniques, temperature distributions have been determined in twist drills. The methods rely on the fact that certain high speed steel materials exhibit microstructural changes when subjected to temperatures greater than 600°C. Quick-stop specimens have also been obtained to study the metal flow patterns over the drill flutes. These results have been used to comment on the different wear mechanisms that affect the performance of a twist drill. Preliminary results show that bulk plastic flow occurs near the margin of the drill where the temperatures are in the vicinity of 900°C when machining AISI 1045 steel at 40 m/min.

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