scholarly journals Investigation of Drilling Process Parameters of Palmyra Based Composite

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
A. Mohan Kumar ◽  
R. Rajasekar ◽  
P. Manoj Kumar ◽  
R. Parameshwaran ◽  
Alagar Karthick ◽  
...  
Keyword(s):  
Process Parameters ◽  
Natural Fiber ◽  
Thrust Force ◽  
Weight Ratio ◽  
Drilling Process ◽  
Mechanical Parts ◽  
Final Assembly ◽  
Drill Bits ◽  
Cone Drill ◽  
Drill Tool

The drilling process is the most essential in the final assembly of the mechanical parts. Natural fiber based composites replace traditional materials due to their advantages, such as strength to weight ratio, availability, and environmental hazards. In this work, an attempt has been made to find the minimum thrust force produced by the drill tool at specified drilling process parameters. The drilling process parameters used for the investigation are rotational speed, tool feed, and resins. The spindle speed and feed rate are selected with three levels. Three resin materials were used, namely, epoxy, polyester, and vinyl ester. Taguchi’s L27 orthogonal array was implemented. The result shows that the candlestick drill bit generated lesser thrust force at the specified drilling process parameters, followed by the twist and step cone drill bits.

scholarly journals Comparative Analysis of Drilling Behaviour of Synthetic and Natural Fiber-Based Composites

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
A. Mohan Kumar ◽  
R. Rajasekar ◽  
P. Manoj Kumar ◽  
R. Parameshwaran ◽  
Alagar Karthick ◽  
...  
Keyword(s):  
Axial Force ◽  
Rotational Speed ◽  
Natural Fiber ◽  
Thrust Force ◽  
Drilling Process ◽  
Response Parameter ◽  
Reinforced Polymer ◽  
Drill Bits ◽  
Drilling Tools ◽  
The Matrix

For comparison, the drilling behaviour of abaca fiber-reinforced polymer (AFRP) composites and Kevlar-reinforced epoxy polymer (KFRP) composites has been studied in the specified experimental condition. The different geometrical drilling tools have been used for the investigation, namely, candlestick (T1), core (T2), standard twist drill (T3), and step cone (T4). The tool feed of 30, 45, and 60 m/min and rotational speed of 1000, 1500, and 2000 rpm have been used for the investigation. The thrust force is chosen as a response parameter for this study. The results revealed that, at lesser rotational speed and tool feed, the thrust force has declined. The result obtained correlates with the abaca fiber-based systems. However, the thrust force of KFRP is higher compared to AFRP composite systems. The axial force generated by candlestick drill is minimal compared to the other drill bits. The following may be responsible for lower thrust force: (1) the axial force distributes circumferential of the cutting tool instead of focusing at the center and (2) the interfacial adhesiveness between the matrix and the fiber is higher. The optimization of drilling process parameters, namely, tool feed and rotational speed on thrust force, has been studied. The results reveal that the tool feed contributed more to axial force compared to rotational speed.

Drilling Force and Chip Morphology in Drilling of PCB Supported Hole

2011 ◽  
Vol 188 ◽  
pp. 429-434 ◽  
Author(s):  
L.P. Yang ◽  
Li Xin Huang ◽  
Cheng Yong Wang ◽  
L.J. Zheng ◽  
Ping Ma ◽  
...  
Keyword(s):  
Feed Rate ◽  
Printed Circuit Board ◽  
Thrust Force ◽  
Chip Morphology ◽  
Cutting Parameters ◽  
Spindle Speed ◽  
Circuit Board ◽  
Drilling Process ◽  
Drilling Force ◽  
Drill Bits

Supported holes of Printed circuit board (PCB) are drilled with two different drill bits. Drilling force (thrust force and torque) and chip morphology are examined at different cutting parameters, and the effects of the two drills are discussed. The results indicate that the drilling force and chip morphology are affected by the feed rate, spindle speed and drill shape. Thrust force increases with the increasing feed rate, and decreases with the increasing spindle speed. Optimization of drill geometry can reduce the thrust force significantly, and is effective in chip breaking which can improve the chip evacuation during the drilling process.

Optimasi Multirespon Gaya Tekan Dan Momen Torsi Pada Penggurdian Material Komposit Glass Fiber Reinforce Polymer (Gfrp) yang Ditumpuk Dengan Material Stainless Steel (SS) Menggunakan Metode Algoritma Genetika

2019 ◽  
Vol 9 (01) ◽  
pp. 1-5
Author(s):  
Angga Sateria
Keyword(s):  
Stainless Steel ◽  
Glass Fiber ◽  
Process Parameters ◽  
Feed Rate ◽  
Thrust Force ◽  
Spindle Speed ◽  
Quality Characteristic ◽  
Drilling Process ◽  
Glass Fiber Reinforced ◽  
Different Levels

Glass fiber reinforced polymer (GFRP)-stainless steel stacks used in the aircraft structural components. The assembly process of this components requires mechanical joining using bolt and nut. The drilling process is commonly used for producing hole to position the bolt correctly. Thrust force and torque are responses that used to evaluate the performance of drilling process. The quality characteristic of these responses are “smaller-is-better.” The aim of this experiment is to identify the combination of process parameters for achieving required multiple performance characteristics in drilling process of GFRP-stainless steel stacks materials. The three important process parameters, i.e., point angle, spindle speed, and feed rate were used as input parameters. Point angle was set at two different levels, whilethe other two were set at three different levels. Hence, a 2 x 3 x 3 full factorial was used as designexperiments. The experiments were replicated two times. The optimization was conducted by using genetic algorithm method. The minimum thrust force and torque could be obtained by using point angle, spindle speed and feed rate of 118o, 2383 rpm, 62 mm/min respectively.

scholarly journals Influences on High-Voltage Electro Pulse Boring in Granite

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2461 ◽  
Author(s):  
Changping Li ◽  
Longchen Duan ◽  
Songcheng Tan ◽  
Victor Chikhotkin
Keyword(s):  
Process Parameters ◽  
High Voltage ◽  
Pulse Discharge ◽  
Rock Breaking ◽  
Electrode Spacing ◽  
Comsol Multiphysics ◽  
Drilling Process ◽  
Electrical Parameters ◽  
Electrode Shape ◽  
Drill Bits

As the exploration and drilling of oil, natural gas and geothermal wells are expanding continuously, research into high-efficiency rock drilling technology is imperative. High-voltage electro pulse boring (EPB) has the advantages of high rock breaking efficiency and good wall quality, and is a new and efficient potential method of rock breaking. The design of electrode drill bits and the selection of drilling process parameters are the main obstacles restricting the commercialization of EPB. Accordingly, it is necessary to determine the influences on high-voltage EPB. In this study, based on the equivalent circuit of high-voltage electro pulse breakdown, a mathematical model of high-voltage electro pulse discharge in rock is established. Meanwhile, a numerical simulation model of high-voltage EPB of hard granite is established based on a coaxial cylindrical electrode structure, which is often used for electrode drill bits. The simulation analysis software Comsol Multiphysics (Comsol Multiphysics®5.3a, COMSOL Co., Ltd., Stockholm, Sweden) is used to study the influences of granite composition, electrode spacing and electrode shape on the high-voltage EPB process. In addition, the influences of electrical parameters on high-voltage EPB are calculated according to a model of high-voltage electro pulse discharge in rock. Finally, it is demonstrated that high-voltage EPB is influenced by granite composition, electrical parameters, electrode spacing, and electrode shape, and the relationships between these factors are obtained. This study is of guiding significance for improving rock breaking efficiency, reducing energy loss, designing electrode drill bits and selecting drilling process parameters.

scholarly journals Penggunaan Metode Particle Swarm Optimization (PSO) pada Optimasi Multirespon Gaya Tekan dan Momen Torsi Penggurdian Material Komposit Glass Fiber Reinforce Polymer (GFRP) yang ditumpuk dengan Material Stainless Steel (SS)

2019 ◽  
Vol 10 (01) ◽  
pp. 1-7
Author(s):  
Angga Sateria ◽  
Indra Dwi Saputra ◽  
Yuli Dharta
Keyword(s):  
Stainless Steel ◽  
Particle Swarm Optimization ◽  
Glass Fiber ◽  
Process Parameters ◽  
Thrust Force ◽  
Particle Swarm ◽  
Drilling Process ◽  
Swarm Optimization ◽  
Feeding Speed ◽  
Different Levels

The Particle Swarm Optimization (PSO) method is one of the methods used for multirespon optimization in the manufacturing process. In this research, the material used is Glass fiber reinforced polymer (GFRP) composite material which is stacked with stainless steel material. The machining process used is a drilling process conducted on a vertical CNC machine Brother TC-22A-O. The thrust force and torque is the response used to evaluate the performance of the drilling process. The quality characteristics of this response "the smaller the better". The aim of this study was to identify the combination of process parameters to achieve the performance characteristics required in drilling process the GFRP-SS material using Particle Swarm Optimization methode (PSO). The three process parameters i.e. point angle, spindle speed, and feeding speed is used as a process parameter. Point angle was set at two different levels, while the other two were set at three different levels. Therefore, the 2 x 3 x 3 factorial is used as the experimental design. The experiments were replicated two times. The minimum thrust force and torque could be obtained by using point angle, spindle speed, and feeding speed are 118o, 2330 rpm, and 65 mm/minrespectively.

scholarly journals Optimization of drilling process parameters on delamination factor of Jute reinforced unsaturated polyester composite using Box-Behnken design of experiment

2020 ◽  
Vol 14 (1) ◽  
pp. 6295-6303
Author(s):  
Zaleha Mustafa ◽  
N. H. Idrus ◽  
A B. Mohd Hadzley ◽  
D. Sivakumar ◽  
M. Y. Norazlina ◽  
...  
Keyword(s):  
Process Parameters ◽  
Feed Rate ◽  
Unsaturated Polyester ◽  
Spindle Speed ◽  
Drilling Process ◽  
Delamination Factor ◽  
Drilling Parameters ◽  
Polyester Composite ◽  
Tool Diameter ◽  
Drill Tool

This paper presents an investigation on the influence of the drilling parameters such as feed rate, spindle speed and drill tool diameter onto the delamination factor of the jute reinforced unsaturated polyester composite. Natural fibre based composite are mostly used for commodity application and often subjected to drilling during applications and may generate delamination of drilled holes on the workpiece. The composite was fabricated using woven jute fibre via vacuum bagging method followed a high temperature curing using hot press. The fibre was kept at 40 vol. %. The main effect and the interaction between the specified factors of feed rate (20-100mm/min), spindle speed (500-1500 rpm) and drill tool diameter (4-8 mm) with delamination factor as corresponding respond was structured via the Response Surface Methodology (RSM) based on three-level Box-Behnken design of experiment and the ANOVA. The levels of importance of the process parameters on flexural properties are determined by using Analysis of Variance (ANOVA). The optimised drilling process parameters obtained as 24.38 mm/min of feed rate, 1146.14 rpm of spindle speed and 5.51 mm drill tool diameter achieved the most minimal delamination factor. The feed rate and spindle speed were perceived as the most influential drilling parameters on the delamination factor of the jute reinforced unsaturated polyester composite.

scholarly journals Study the Impact of Drilling Process Parameters on Natural Fiber Reinforced Herringbone Epoxy Composites

2020 ◽  
Vol 44 (5) ◽  
pp. 339-345
Author(s):  
Nagamadhu Mahadevappa ◽  
Vijay K. Shankar ◽  
Samuel Sehgal ◽  
Rajath Upadhya
Keyword(s):  
Regression Analysis ◽  
Process Parameters ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Machining Process ◽  
Epoxy Composites ◽  
Drilling Process ◽  
Drilling Performance ◽  
Drill Diameter ◽  
The Impact

Common fiber composite overlays are attractive for a few applications, (for example, aviation and flying machine auxiliary parts) because of their predominant properties and bio-degradable. Typically, mechanical drilling process parameters are significant effect final machining process outcomes. It covers drilling performance like convectional drilling, grinding, vibration-influence twist drilling, and rapid boring, drilling apparatus geometry and materials, drilling actuated delamination and its smothering methodologies, thrust power, and wear rate. This paper aimed to address the effect and ranking of process parameters on trust force, torque, and delamination at both entry and exit of the hole sisal fabric herringbone reinforced epoxy composites. The herringbone woven sisal fabric reinforced epoxy composite is fabricated using conventional compression molding technique. The result shows that at higher speed and feed rate delamination at both entrance and exit, thrust force, and toque decreases. Optimum drill diameter found from 6 to 10 mm to obtain minimum responses. As four output parameters are deciding quality of drilled hole, further grey regression analysis is used to study the ranking of output responses. Form grey regression analysis it is found that for 2700 rpm spindle speed, 60 mm/min feed and 8 mm diameter exhibit minimum effort.

scholarly journals Optimization of CFRP Micro Drilling Parameter using 2-Level Factorial Method Towards Thrust Force

2019 ◽  
Vol 9 (2) ◽  
pp. 4487-4491
Keyword(s):  
Material Properties ◽  
Feed Rate ◽  
Optimum Parameter ◽  
Thrust Force ◽  
Weight Ratio ◽  
Spindle Speed ◽  
Material Behavior ◽  
Machining Process ◽  
Drilling Process ◽  
Micro Drilling

Carbon Fiber Reinforced Polymer (CFRP) is extensively used in aircraft and automotive industries due to it exceptional material properties such as high strength to weight ratio and corrosion resistance. Nevertheless, micro drilling process of CFRP material poses various challenge as it has irregular material properties along the structure. High cutting force which lead to poor hole quality is one of the issues that always occur when drilling this material. Hence, the understanding on the relationship between process parameter and material behavior is vital to achieve optimum performance of machining process. The experiment was carried out using 2-level factorial design with variable spindle speed range of 8,000 – 12,000 rpm and feed rate range of 0.01-0.015 mm/rev. Micro drill bit with diameter of 0.9 mm was used and new fresh drill were used for every run to avoid tool wear effect. As a result, lower thrust force of 6.3742 N is obtained from the combination of spindle speed 10k rpm and feed rate 0.0125 N. Therefore, it can be concluded that, optimum parameter falls between the range of 8,000 – 12,000 rpm of spindle speed and 0.01-0.015 mm/rev of feed rate. Validation of the optimum parameter suggested from 2-level factorial which are 8,000 rpm and 0.01 mm/rev is executed. The final result obtained shows 4.5% of error from targeted value and this result is absolutely acceptable and portray the reliability of the experiment.

Study the impact of drilling process parameters on natural fiber reinforced chaired epoxy composites

2020 ◽  
Vol 24 ◽  
pp. 2204-2218 ◽  
Author(s):  
Kiran ◽  
M. Nagamadhu ◽  
M. Jaiprakash ◽  
K. Karthikeyan ◽  
Mudabbir shariff
Keyword(s):  
Process Parameters ◽  
Natural Fiber ◽  
Epoxy Composites ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
The Impact
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