scholarly journals Automated Drill Modeling for Drilling Process Simulation

2007 ◽  
Vol 7 (3) ◽  
pp. 276-282 ◽  
Author(s):  
Athulan Vijayaraghavan ◽  
David A. Dornfeld
Keyword(s):  
Finite Element ◽  
Process Simulation ◽  
Finite Element Simulations ◽  
Burr Formation ◽  
Drilling Process ◽  
Design Changes ◽  
Modeling Techniques ◽  
Drill Point ◽  
Twist Drills ◽  
Drill Design

Accurate models of two-flute conical twist drills are needed for finite element simulations of the drilling process. Existing drill designing methods rely extensively on discretized analytical equations to describe the drill and different sets of equations that need to be formulated as the drill design changes. This paper presents a method to create accurate models of two-flute conical twist drills using solid-modeling techniques, which addresses some of these shortcomings. Boolean operations are used to mimic the drill manufacturing steps and generate the fully designed drill. The drills generated by this method have been used in finite element simulations to study the effect of drill point geometry on burr formation in drilling.

Study on Deep Hole Drilling Process and Cutting Performance

2020 ◽  
Vol 866 ◽  
pp. 42-53
Author(s):  
F.Q. You ◽  
R. Zhang ◽  
Yong Guo Wang
Keyword(s):  
Finite Element ◽  
Reference Value ◽  
Drilling Process ◽  
Deep Hole ◽  
Drilling Force ◽  
Finite Element Software ◽  
Drilling Temperature ◽  
Drilling Parameters ◽  
Simulation Results ◽  
Twist Drills

In deep hole machining, drilling parameters for twist drills have an important impact on tool life and economic efficiency. In order to explore the influence of drilling parameters on twist drills, this paper established a drilling model for twist drill 45 steel, orthogonal experiments were designed. AdvantEdge FEM finite element software was used to simulate the drilling force, torque and drilling temperature. The drilling force, torque and drilling temperature were analyzed by using the finite element simulation value as the orthogonal experimental value. In order to ensure that the simulation results have certain reference value, the drilling experiment was carried out in order to ensure the simulation results have reference value. Finally, the optimal combination of drilling parameters was obtained.

3D Finite Element Assisted Numerical Simulation of Orbital Drilling Process of Ti6Al4V

2019 ◽  
Author(s):  
Salman Pervaiz ◽  
Ali Daneji ◽  
Sathish Kannan
Keyword(s):  
Finite Element ◽  
Rotational Speed ◽  
Cutting Forces ◽  
Threshold Value ◽  
Machining Process ◽  
Burr Formation ◽  
Drilling Process ◽  
Low Thrust ◽  
High Rotational Speed ◽  
Orbital Drilling

Abstract Drilling is one of most executed manufacturing operations to assist the assembling of different engineering components. In orbital drilling process, a milling tool is rotating along its own axis in combination with the spiral rotational movement. The rotation of tool about its own axis is with high rotational speed, but the spiral movement of tool is at low rotational speed. These rotational movements generate a hollow geometry when moved in combination. Orbital drilling process is emerging as a viable drilling process when burr formation has to be reduced from the metallic workpiece. It is gaining more popularity in the aerospace industry due to its ability to machine holes in difficult to cut alloys, composites and composite stacks. Major advantages of orbital drilling are linked with efficient chip evacuation, reduction in heat build-up and low thrust forces due to its intermittent cutting nature. The cutting forces generated during the process can be taken as a significant output parameter that play a vital role towards the overall performance of the cutting process. Controlling the cutting forces under threshold value can improve the overall machining efficiency by limiting associated deflections, tool wear and energy consumption. The current paper aims to study the orbital drilling process using finite element (FE) assisted numerical methodology. The study will utilize different orbital drilling parameters such as spindle speed, orbit speed and axial feed rate, and explore their influence on the over all machining process.

A Bar and Hinge Model for Simulating Bistability in Origami Structures With Compliant Creases

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Yi Zhu ◽  
Evgueni T. Filipov
Keyword(s):  
Finite Element ◽  
Finite Element Simulations ◽  
Simulation Framework ◽  
Bistable Behavior ◽  
Proposed Model ◽  
Modeling Techniques ◽  
Hinge Model

Abstract Active origami structures usually have creases made with soft and compliant plates because it is difficult to fabricate real hinges and actuate them. However, most conventional origami modeling techniques fail to capture these compliant creases and simplify them as concentrated rotational springs, which neglects torsional and extensional deformations of the creases. In this paper, an improved formulation of a bar and hinge model is proposed to explicitly capture the geometry and the flexibility of compliant creases with nonnegligible width in an origami, and the model is verified against finite element simulations. The verification shows that the model performs relatively well despite being simple and computationally inexpensive. Moreover, simulation examples demonstrate that the proposed model can capture the bistable behavior of the compliant crease origami with nonnegligible crease width because it explicitly includes the extensional stretching energy into the simulation framework and allows torsional crease deformations.

Simulation of Stainless Steel Drilling Mechanism Based on Deform-3D

2010 ◽  
Vol 160-162 ◽  
pp. 1685-1690 ◽  
Author(s):  
Xing Jun Gao ◽  
Huan Li ◽  
Qing Liu ◽  
Ping Zou ◽  
Feng Liu
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Cutting Temperature ◽  
Work Piece ◽  
Drilling Process ◽  
Twist Drill ◽  
Finite Element Software ◽  
Finite Element Analysis Simulation ◽  
Twist Drills ◽  
Deform 3D

An emulation study of the drilling mechanism by general purpose twist drills is conducted by using FEM analysis software Deform-3D. Application of finite element software Deform-3D, some characteristic parameters of the work piece and the cutting tool material are combined. The load boundary conditions and the friction between tool rake face and chip are analyzed and defined. The chip separation criteria are chosen. The finite element analysis simulation of pretreatments is completed. By the finite element simulation analysis, the three-dimensional FEM model of twist drill is build. The scraps forming process and the distributed situation of cutting force，cutting temperature in the drilling process are analyzed. The effect of cutting variables on drilling forces of stainless steel is analyzed. The drilling temperature and the drill wear condition are discussed. The effect of the main geometric parameters on the stainless steel twist drill drilling performance is studied.

Simplified Method of Resin Infusion Process Simulation on Example of Formula Student Lightweight Components

2016 ◽  
Vol 251 ◽  
pp. 41-46
Author(s):  
Maciej Wnuk ◽  
Artur Iluk
Keyword(s):  
Finite Element ◽  
Process Design ◽  
Process Simulation ◽  
Cost Ratio ◽  
Main Difficulty ◽  
Resin Infusion ◽  
Excellent Quality ◽  
Expensive Equipment ◽  
Simplified Method ◽  
Very High

In the production of lightweight composite parts, resin infusion is the leading technology due to its excellent quality-to-cost ratio [1], [2]. Not only is there no need to use expensive equipment such as autoclaves, but the resulting fiber to resin ratio is very high, which makes parts very stiff, strong, and lightweight [3], [4]. Other advantages include a glossy surface and a structure that free of macro-pores, provided when the process is well prepared. The equipment used in this process allows one to manufacture part in virtually any size and shape [5]. The main difficulty is to design resin feed lines in way that will saturate fabrics until the resin gels. To facilitate this process design finite element codes can be used to simulate the flow of resin during infusion [6].

Thermomechanical finite element simulations of ultrasonically assisted turning

2005 ◽  
Vol 32 (3-4) ◽  
pp. 463-471 ◽  
Author(s):  
A.V. Mitrofanov ◽  
V.I. Babitsky ◽  
V.V. Silberschmidt
Keyword(s):  
Finite Element ◽  
Finite Element Simulations
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