Thermal Analysis Simulation of a Single Pulse Laser Drilling Process

2014 ◽  
Vol 800-801 ◽  
pp. 869-873
Author(s):  
Bo Zhu ◽  
Song Nian Tan ◽  
Yu Kui Wang
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Heat Flux ◽  
Pulse Laser ◽  
Thermal Model ◽  
Single Pulse ◽  
Laser Drilling ◽  
Drilling Process ◽  
Simulation Results ◽  
Gauss Distribution

A thermal model of a single pulse laser drilling process by using finite element method is presented. Some parameters such as conduction, convection, thermal properties of material with temperature and gauss distribution of heat flux has been considered in the laser drilling process. The simulation result shows the trend of dynamic temperature distribution of heat-affected zone, and by using the element birth and technique, the geometry size of the hole could be predicted in the simulation. Through the comparison between the simulation results and the actual experiment process results, the validity of the simulation model has been verified.

A Combined CFD, ANFIS and NSGA-II Model for Repetitive Pulse Laser Drilling Process

2020 ◽  
Vol 7 (4) ◽  
pp. 449-477
Author(s):  
S. Sukumar ◽  
S. P. Kar ◽  
A. Swain ◽  
R. K. Sarangi ◽  
P. C. Sekhar
Keyword(s):  
Pulse Laser ◽  
Laser Drilling ◽  
Drilling Process ◽  
Nsga Ii

Thermal Analysis of Heating System in Thermosonic Bonding Process

2013 ◽  
Vol 300-301 ◽  
pp. 794-801
Author(s):  
Lu Fan Zhang ◽  
Xue Li Li ◽  
Ji Wen Fang ◽  
Jian Dong Cai ◽  
Long Sheng Nian ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Thermal Stress ◽  
Thermal Model ◽  
Reference Value ◽  
Heating System ◽  
Bonding Process ◽  
Thermal Displacement ◽  
Process Heating ◽  
Thermal Stress Distribution

A constant temperature range of the heating system plays an important role in the thermosonic bonding process. Heating block will provide enough heat for the heating system. In the paper, the thermal model of heating block and heating system were calculated by finite element method, and then some important conclusions were obtained. The change of temperature and thermal stress of block with the reference value of x and y was obtained. And an optimal structure of block for right temperature was built. The temperature distribution, thermal displacement and thermal stress distribution of the heating block and heating system were disclosed. The relevant change trends of temperature and thermal stress under the different load of temperature were investigated. These results can help improve the reliability of the heating system used in the thermosonic bonding process.

Numerical Simulation of Cathode Erosion in EDM Process

2012 ◽  
Vol 462 ◽  
pp. 109-115
Author(s):  
Zhen Long Wang ◽  
Bao Cheng Xie ◽  
Yu Kui Wang ◽  
Wan Sheng Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Heat Flux ◽  
Finite Element ◽  
Thermal Properties ◽  
Temperature Distribution ◽  
Material Removal ◽  
Cathode Erosion ◽  
Gauss Distribution ◽  
Edm Process

A numerical model of cathode erosion in EDM process using finite element method is presented. Using this model, numerical simulation of the single spark of EDM process has been carried out with parameters such as conduction, convection, the latent heat of phase change, thermal properties of material with temperature and gauss distribution of heat flux to predict the temperature distribution in the discharge point of cathode as a result of single discharges in EDM process. The simulation result shows the trend of dynamic temperature distribution of heat -affected zone and well explains mechanism of material removal in EDM process.

scholarly journals The Role of Focus Position in Single Pulse Laser Drilling of Highly Reflecting Materials

2019 ◽  
Vol 2 (1) ◽  
pp. 61-68
Author(s):  
György Meszlényi ◽  
Enikő Bitay
Keyword(s):  
Pulse Laser ◽  
Laser Processing ◽  
Printed Circuit Boards ◽  
Focal Spot ◽  
Single Pulse ◽  
Laser Drilling ◽  
Focus Position ◽  
Circuit Boards ◽  
Printed Circuit

Abstract The laser processing of materials which are highly reflective at laser wavelengths is problematic. We have to take into account that only a small part of the energy is absorbed, the main part being reflected. In this article we examine the laser processing of highly reflective copper and silver at 1070 nm wavelength. In laser drilling of printed circuit boards it is necessary to drill copper layer as well. In highly reflecting materials we can drill smaller holes because of the low energy efficiency. Naturally in single pulse laser drilling the focus position plays a key role: at the focal spot of the laser beam smaller diameter holes are produced, further from the focal spot, higher diameter holes are produced.

scholarly journals An integrated analysis of productivity, hole quality and cost estimation of single-pulse laser drilling process

2020 ◽  
pp. 095440542096816
Author(s):  
Shoaib Sarfraz ◽  
Essam Shehab ◽  
Konstantinos Salonitis ◽  
Wojciech Suder ◽  
Misbah Niamat ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Flow Rate ◽  
Pulse Energy ◽  
Gas Flow ◽  
Single Pulse ◽  
Laser Drilling ◽  
Drilling Process ◽  
Gas Flow Rate ◽  
Hole Quality ◽  
Drilling Cost

Laser drilling is a well-established manufacturing process utilised to produce holes in various aeroengine components. This research presents an experimental investigation on the effects of laser drilling process parameters on productivity (material removal rate), hole quality (hole taper) and drilling cost. Single-pulse drilling was employed to drill a thin-walled Inconel 718 superalloy plate of 1 mm thickness using pulsed Nd:YAG laser. The experiments were designed using Box-Behnken statistical approach to investigate the impacts of pulse energy, pulse duration, gas pressure and gas flow rate on the selected responses. Multi-objective optimisation was performed using response surface methodology (RSM) based grey rational analysis (GRA) to identify optimal drilling conditions aiming to maximise the MRR and minimise hole taper and drilling cost. The optimal combination of drilling parameters was found as pulse energy of 20 J, pulse duration of 6 ms, gas pressure of 100 psi and gas flow rate of 40 mm3/s. A detailed cost analysis identified labour cost, gas consumption and machine costs as the major cost elements of the laser drilling process.

Finite Element Method for Thermal Analysis and Ablative Calculation of Heat Protection Materials

2007 ◽  
Vol 336-338 ◽  
pp. 2501-2504
Author(s):  
Zhong Ping Li ◽  
Yuan Fa Ding ◽  
Fan Wei Zhang ◽  
Yue Zhang
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Heat Flux ◽  
Finite Element ◽  
Thermal Gradient ◽  
Thermal Load ◽  
Ablation Rate ◽  
High Thermal Gradient ◽  
Heat Protection ◽  
Element Method

Finite element method (FEM) was used for planar ablation problem of heat protection materials based on thermal analysis. ANSYS, a commercial FEM code, was employed for modeling and calculating, and material deleting and boundary moving problems were solved with its advanced techniques. Various heat flux (HF) densities ranging from 1 to 10 MW/m2 as thermal loads were investigated to the effects of heat conduction and ablation, respectively. The results showed that a sudden thermal load can cause great temperature rise and high thermal gradient near the surface of the material. The ablative quantity and ablation rate were also calculated, and mathematical models have been deduced for them.

scholarly journals The influence of busbars connection on fuselink temperature at fast fuses

2019 ◽  
Vol 32 (2) ◽  
pp. 303-314
Author(s):  
Adrian Plesca
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Finite Element ◽  
Thermal Behaviour ◽  
Software Package ◽  
Thermal Model ◽  
Three Dimensional ◽  
Real Situation ◽  
Load Variations ◽  
The One

The paper, based on three-dimensional thermal modelling and simulation finite element method software package, presents a comparison between the thermal behaviour of a fast fuse without busbar terminals and the one with these busbars mounted on it. The maximum fuselink temperature is lower in the second case when the thermal model had taken into consideration the busbar connections, actually, the real situation. Also, a thermal analysis for different type of load variations has been done in both cases of the fast fuse geometry with and without busbar terminals.

Finite Element Analysis of The Thermal Behaviour of Different Types of Connecting Rod for Various Materials

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
D. Sheiksha Vali ◽  
T. Micha Premkumar ◽  
A. Anand Sai ◽  
P.V. Sudarshan ◽  
P. Roopak ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Heat Flux ◽  
Finite Element ◽  
Temperature Distribution ◽  
High Performance ◽  
Connecting Rod ◽  
Element Analysis ◽  
Different Types ◽  
Element Method

Thermal analysis of different types of the connecting rods are under stead state condition using finite element method. The energy equation and heat transfer equation in the solids are completely addressed and solved using the Newton-Raphson technique and finite element method. SOLID WORKS is used for modelling different types of connecting rods and ANSYS© software is used to perform this numerical investigation. Three different materials like structural steel, aluminium alloy and titanium are selected as the material of connecting rod to do the comparative studies. In a steady thermal analysis, properties like temperature distribution, total heat flux and directional heat flux are calculated. The knowledge of the above properties is required to identify the viscosity of oil used for lubrication and also temperature distribution is helpful to find the thermal deformation in the connecting rod. Temperature and convection co-efficient are the boundary conditions. 22°C is the initial temperature value and the value of convection co-efficient is 350W/m2°C. As a result of thermal analysis, titanium alloy is the best material among the three materials as it with stand higher temperatures, high lifecycle and high performance.

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