Development Of Virtual Cnc Machine Tools And Web Based Machining Process Simulation Mechanistic Cutting Force Models And Determination Of Specific Force Coefficients In Helical End Milling
DOWNLOAD
Download Development Of Virtual Cnc Machine Tools And Web Based Machining Process Simulation Mechanistic Cutting Force Models And Determination Of Specific Force Coefficients In Helical End Milling PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Development Of Virtual Cnc Machine Tools And Web Based Machining Process Simulation Mechanistic Cutting Force Models And Determination Of Specific Force Coefficients In Helical End Milling book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Development Of Virtual Cnc Machine Tools And Web Based Machining Process Simulation Mechanistic Cutting Force Models And Determination Of Specific Force Coefficients In Helical End Milling
DOWNLOAD
Author : Vinay Rao Talekar
language : en
Publisher:
Release Date : 2011
Development Of Virtual Cnc Machine Tools And Web Based Machining Process Simulation Mechanistic Cutting Force Models And Determination Of Specific Force Coefficients In Helical End Milling written by Vinay Rao Talekar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Titanium alloys categories.
"This thesis presents the results of the investigations of mechanistic modeling and simulation of cutting forces in high speed end milling of titanium alloy, Ti-6Al-4V, and the determination of specific cutting and edge force coefficients for carbide bull-nose helical end-mill. A generalized mathematical model representing the outer geometry of an end-mill and the cutter edge geometry is presented. Mechanistic cutting force models have been developed for a general helical end-mill and modeled specifically for a bullnose helical end-mill. A MATLAB code for the mechanistic cutting force models have been developed for the simulation of cutting force components in end milling and for the determination of specific cutting and edge force coefficients for any workpiece-tool material pair. Specific cutting and edge force coefficients are obtained for carbide bullnose helical end-mill - titanium alloy workpiece material pair at 10% radial immersion up-milling experiments. The effects of machining parameters: feed per tooth, helix angle, axial depth of cut, corner radius, number of cutter flutes, and spindle speed on cutting forces were investigated. End milling experiments were conducted on titanium alloy, Ti-6Al-4V, using a 0.5 inch (12.7 mm) diameter carbide bull-nose helical end-mill to verify the models. Predicted cutting force components (F[subscript x], F[subscript y], and F[subscript z]) obtained by the mechanistic cutting force models were compared with measured experimental values, and also with predicted and measured values from published literature. The results were in good agreement in both cases. This method for the determination of specific force coefficients and predicting cutting forces for titanium alloys can easily be extended to other metal alloys such as Hastelloy, Inconel, and niobium alloys"--Abstract, leaf iv.
Virtual Modeling And Simulation Of Vertical Machining Center And Cnc Milling Machine For Training And Instruction
DOWNLOAD
Author : Vishnu Vardhan Venkata Irigireddy
language : en
Publisher:
Release Date : 2000
Virtual Modeling And Simulation Of Vertical Machining Center And Cnc Milling Machine For Training And Instruction written by Vishnu Vardhan Venkata Irigireddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Mechanistic Modeling Of Cutting Forces In Wavy Edge Bull Nose Helical End Milling Of Inconel 718 Under Different Cooling Lubrication Strategies
DOWNLOAD
Author : Abdulhakim Ali Sultan
language : en
Publisher:
Release Date : 2015
Mechanistic Modeling Of Cutting Forces In Wavy Edge Bull Nose Helical End Milling Of Inconel 718 Under Different Cooling Lubrication Strategies written by Abdulhakim Ali Sultan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
"This research presents the results of the development of a mechanistic cutting force prediction model for the wavy-edge bull-nose helical endmill (WEBNHE). The mechanistic model was developed to predict cutting force components and the resultant cutting force in high-speed end-milling of Inconel 718 under two cooling strategies: emulsion and Minimum Quantity Lubrication (MQL). The effects of the cooling strategies are incorporated into the mechanistic model through six cutting force coefficients (K[sub tc] ,K[sub rc] ,K[sub ac]), and edge force coefficients (K[sub te], K[sub re], K[sub ae]), which have been experimentally identified in a separate research. The mechanistic model was validated by conducting end-milling experiments on Inconel 718 using a WEBNHE of 1.25'' diameter under emulsion and MQL cooling strategies. In addition to cutting forces prediction, the mechanistic cutting force prediction model is used to investigate the effects of the cooling strategy, and the effects of the geometric parameters of the WEBNHE on the predicted cutting force components and the resultant cutting force. The geometric parameters investigated in this research were: wave magnitude, wave length, axial shift, and the helix angle. The cutting force components and the resultant cutting force predicted by this mechanistic cutting force model under the two cooling strategies were in good agreement with the experimental results. Additionally, the results show that an increase in the depth of cut under MQL generates less cutting force than the same increase under emulsion. Moreover, all predicted cutting force components increase when the magnitude of the WEBNHE increases, whereas they decrease when the wave length, axial shift, and the helix angle increase"--Abstract, page iv.
Vibration Assisted Machining
DOWNLOAD
Author : Lu Zheng
language : en
Publisher: John Wiley & Sons
Release Date : 2021-02-16
Vibration Assisted Machining written by Lu Zheng and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-02-16 with Science categories.
The first book to comprehensively address the theory, kinematic modelling, numerical simulation and applications of vibration assisted machining Vibration Assisted Machining: Theory, Modelling and Applications covers all key aspects of vibration assisted machining, including cutting kinematics and dynamics, the effect of workpiece materials and wear of cutting tools. It also addresses practical applications for these techniques. Case studies provide detailed guidance on the design, modeling and testing of VAM systems. Experimental machining methods are also included, alongside considerations of state-of-the-art research developments on cutting force modeling and surface texture generation. Advances in computational modelling, surface metrology and manufacturing science over the past few decades have led to tremendous benefits for industry. This is the first comprehensive book dedicated to design, modelling, simulation and integration of vibration assisted machining system and processes, enabling wider industrial application of the technology. This book enables engineering students and professionals in manufacturing to understand and implement the latest vibration assisted machining techniques. Highlights include: Comprehensive coverage of the theory, kinematics modelling, numerical simulation and applications of vibration assisted machining (VAM) Case studies with detailed guidance on design, modelling and testing of VAM systems, as well as experimental machining methods Discussion of state-of-the-art research developments on cutting force modelling and surface texture generation Coverage of the history of VAM, its current applications and future directions for the technology Vibration Assisted Machining: Theory, Modelling and Applications provides engineering students, researchers, manufacturing engineers, production supervisors, tooling engineers, planning and application engineers and machine tool designers with the fundamentals of vibration assisted machining, along with methodologies for developing and implementing the technology to solve practical industry problems.
Prediction Of Chatter In Cnc Machining Based On Dynamic Cutting Force For Ball End Milling
DOWNLOAD
Author : Nor Komariah Hasfa
language : en
Publisher:
Release Date : 2008
Prediction Of Chatter In Cnc Machining Based On Dynamic Cutting Force For Ball End Milling written by Nor Komariah Hasfa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Machining categories.
This paper presents the suitable depth of cut, spindle speed and feed rate that will be chosen during machining. If thus parameters are not considered, this can provoke abnormal tool behavior such as chatter. Chatter will limit the tool life which only can be use for just a few times. To predict the chatter occurs, the parameters will be use are spindle speed, depth of cut and feed rate. CNC machine will be use. This process will base on dynamic cutting force model for ball end milling. The selections of cutting tool are depends on the process that will done where the chatter can be observed during this machining process. Cold work tool steel (AISI-D2) chosen as a material and its parameter is 100x100x25 mm. Cutter used was high speed steel 2 flute ball nose. Force dynamometer will be use to measure force and 27 tests will be done to observe the chatter occur. Analysis done by referring the result that measured by force dynamometer. The chatter in ball end milling can be detected from the calculated cutting forces and their frequency spectra. A comparison of the predicted and measured cutting forces demonstrated that the proposed method provides accurate results.
Virtual Machining Using Camworks 2018
DOWNLOAD
Author : Kuang-Hua Chang
language : en
Publisher: SDC Publications
Release Date : 2018-04
Virtual Machining Using Camworks 2018 written by Kuang-Hua Chang and has been published by SDC Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04 with Computers categories.
This book is written to help you learn the core concepts and steps used to conduct virtual machining using CAMWorks. CAMWorks is a virtual machining tool designed to increase your productivity and efficiency by simulating machining operations on a computer before creating a physical product. CAMWorks is embedded in SOLIDWORKS as a fully integrated module. CAMWorks provides excellent capabilities for machining simulations in a virtual environment. Capabilities in CAMWorks allow you to select CNC machines and tools, extract or create machinable features, define machining operations, and simulate and visualize machining toolpaths. In addition, the machining time estimated in CAMWorks provides an important piece of information for estimating product manufacturing cost without physically manufacturing the product. The book covers the basic concepts and frequently used commands and options you’ll need to know to advance from a novice to an intermediate level CAMWorks user. Basic concept and commands introduced include extracting machinable features (such as 2.5 axis features), selecting machine and tools, defining machining parameters (such as feedrate), generating and simulating toolpaths, and post processing CL data to output G-codes for support of CNC machining. The concept and commands are introduced in a tutorial style presentation using simple but realistic examples. Both milling and turning operations are included. One of the unique features of this book is the incorporation of the CL (cutter location) data verification by reviewing the G-codes generated from the toolpaths. This helps you understand how the G-codes are generated by using the respective post processors, which is an important step and an ultimate way to confirm that the toolpaths and G-codes generated are accurate and useful. This book is intentionally kept simple. It primarily serves the purpose of helping you become familiar with CAMWorks in conducting virtual machining for practical applications. This is not a reference manual of CAMWorks. You may not find everything you need in this book for learning CAMWorks. But this book provides you with basic concepts and steps in using the software, as well as discussions on the G-codes generated. After going over this book, you will develop a clear understanding in using CAMWorks for virtual machining simulations, and should be able to apply the knowledge and skills acquired to carry out machining assignments and bring machining consideration into product design in general. Who this book is for This book should serve well for self-learners. A self-learner should have a basic physics and mathematics background. We assume that you are familiar with basic manufacturing processes, especially milling and turning. In addition, we assume you are familiar with G-codes. A self-learner should be able to complete the ten lessons of this book in about forty hours. This book also serves well for class instructions. Most likely, it will be used as a supplemental reference for courses like CNC Machining, Design and Manufacturing, Computer-Aided Manufacturing, or Computer-Integrated Manufacturing. This book should cover four to five weeks of class instructions, depending on the course arrangement and the technical background of the students. What is virtual machining? Virtual machining is the use of simulation-based technology, in particular, computer-aided manufacturing (CAM) software, to aid engineers in defining, simulating, and visualizing machining operations for parts or assembly in a computer, or virtual, environment. By using virtual machining, the machining process can be defined and verified early in the product design stage. Some, if not all, of the less desirable design features in the context of part manufacturing, such as deep pockets, holes or fillets of different sizes, or cutting on multiple sides, can be detected and addressed while the product design is still being finalized. In addition, machining-related problems, such as undesirable surface finish, surface gouging, and tool or tool holder colliding with stock or fixtures, can be identified and eliminated before mounting a stock on a CNC machine at shop floor. In addition, manufacturing cost, which constitutes a significant portion of the product cost, can be estimated using the machining time estimated in the virtual machining simulation. Virtual machining allows engineers to conduct machining process planning, generate machining toolpaths, visualize and simulate machining operations, and estimate machining time. Moreover, the toolpaths generated can be converted into NC codes to machine functional parts as well as die or mold for part production. In most cases, the toolpath is generated in a so-called CL data format and then converted to G-codes using respective post processors.
A Mechanistic Cutting Dynamic Model Of Helix End Mill And Its Application For The Intelligent Cam
DOWNLOAD
Author : Kyungcheul Ko
language : en
Publisher:
Release Date : 1997
A Mechanistic Cutting Dynamic Model Of Helix End Mill And Its Application For The Intelligent Cam written by Kyungcheul Ko and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Machine-tools categories.
For mass production of uniform quality parts in modern industry, computer numeric control (CNC) machining is widely used. Generally, machining parameters in CNC machining are chosen from machining tables, skilled experience or empirical methods. One of evident phenomena in machining is that tool wear is unavoidable; hence, the best management of cutting tools in mass production is the minimization of tool wear during sequential machine processes. No systematic selection of cutting parameters in CNC machining can guarantee proper cutting state in complex milling. To provide cutting information in a wide cutting range, a mechanistic cutting dynamic model is essential for a strong foundation in advanced machining industry. Modern CAD/CAM systems are intended to support seamless manufacturing from conceptual design to machining. Benefits of CAD/CAM programs are automation of this sequence and reduction of machining programming time. Normally, conventional CAM systems use the cutting parameters converted values from the machining tables without consideration of diverse cutting conditions. Table driven selection of cutting parameters in conventional CAD/CAM can cause an overload on the cutting tool and result in inefficient machine and tool management. Adaptation of a mechanistic cutting model of the tool in a conventional CAD/CAM system is in high demand for complex cutting conditions involving different materials, tools, and cutting parameters. This feature can minimize the tool wear and breakage that results from incorrect selection of cutting parameters. In this dissertation, as a proper tool for a systematic framework for selection of cutting parameters in complex milling operations, a mechanistic cutting model for a wide cutting situations is developed. To verify this cutting dynamic model, a sequence of experiments are performed. When this advanced feature is added to conventional CAD/CAM systems, seamless machining with safe and efficient cutting parameters is possible. Based on a model developed in this thesis, a framework for selecting safe and efficient cutting parameters in various cutting situations is provided. Solid model based tool trajectory planning with consideration of the effect of the change of depth of cut is demonstrated. Finally, the efficiency of the unit machining process composed of tool trajectory and recommended parameters will be shown for elimination of redundant calculations for the same milling cutting conditions.
Virtual Machining Using Camworks 2020
DOWNLOAD
Author : Kuang-Hua Chang
language : en
Publisher: SDC Publications
Release Date :
Virtual Machining Using Camworks 2020 written by Kuang-Hua Chang and has been published by SDC Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on with Computers categories.
This book is written to help you learn the core concepts and steps used to conduct virtual machining using CAMWorks. CAMWorks is a virtual machining tool designed to increase your productivity and efficiency by simulating machining operations on a computer before creating a physical product. CAMWorks is embedded in SOLIDWORKS as a fully integrated module. CAMWorks provides excellent capabilities for machining simulations in a virtual environment. Capabilities in CAMWorks allow you to select CNC machines and tools, extract or create machinable features, define machining operations, and simulate and visualize machining toolpaths. In addition, the machining time estimated in CAMWorks provides an important piece of information for estimating product manufacturing cost without physically manufacturing the product. The book covers the basic concepts and frequently used commands and options you’ll need to know to advance from a novice to an intermediate level CAMWorks user. Basic concepts and commands introduced include extracting machinable features (such as 2.5 axis features), selecting machine and tools, defining machining parameters (such as feed rate), generating and simulating toolpaths, and post processing CL data to output G-codes for support of CNC machining. The concepts and commands are introduced in a tutorial style presentation using simple but realistic examples. Both milling and turning operations are included. One of the unique features of this book is the incorporation of the CL (cutter location) data verification by reviewing the G-codes generated from the toolpaths. This helps you understand how the G-codes are generated by using the respective post processors, which is an important step and an ultimate way to confirm that the toolpaths and G-codes generated are accurate and useful. This book is intentionally kept simple. It primarily serves the purpose of helping you become familiar with CAMWorks in conducting virtual machining for practical applications. This is not a reference manual of CAMWorks. You may not find everything you need in this book for learning CAMWorks. But this book provides you with basic concepts and steps in using the software, as well as discussions on the G-codes generated. After going over this book, you will develop a clear understanding in using CAMWorks for virtual machining simulations, and should be able to apply the knowledge and skills acquired to carry out machining assignments and bring machining consideration into product design in general. Who this book is for This book should serve well for self-learners. A self-learner should have a basic physics and mathematics background. We assume that you are familiar with basic manufacturing processes, especially milling and turning. In addition, we assume you are familiar with G-codes. A self-learner should be able to complete the ten lessons of this book in about forty hours. This book also serves well for class instructions. Most likely, it will be used as a supplemental reference for courses like CNC Machining, Design and Manufacturing, Computer-Aided Manufacturing, or Computer-Integrated Manufacturing. This book should cover four to five weeks of class instructions, depending on the course arrangement and the technical background of the students. What is virtual machining? Virtual machining is the use of simulation-based technology, in particular, computer-aided manufacturing (CAM) software, to aid engineers in defining, simulating, and visualizing machining operations for parts or assembly in a computer, or virtual, environment. By using virtual machining, the machining process can be defined and verified early in the product design stage. Some, if not all, of the less desirable design features in the context of part manufacturing, such as deep pockets, holes or fillets of different sizes, or cutting on multiple sides, can be detected and addressed while the product design is still being finalized. In addition, machining-related problems, such as undesirable surface finish, surface gouging, and tool or tool holder colliding with stock or fixtures, can be identified and eliminated before mounting a stock on a CNC machine at shop floor. In addition, manufacturing cost, which constitutes a significant portion of the product cost, can be estimated using the machining time estimated in the virtual machining simulation. Virtual machining allows engineers to conduct machining process planning, generate machining toolpaths, visualize and simulate machining operations, and estimate machining time. Moreover, the toolpaths generated can be converted into NC codes to machine functional parts as well as die or mold for part production. In most cases, the toolpath is generated in a so-called CL data format and then converted to G-codes using respective post processors.
Machining Error Source Diagnostics Using A Turning Process Simulator
DOWNLOAD
Author : Sung-Gwang Chen
language : en
Publisher:
Release Date : 1993
Machining Error Source Diagnostics Using A Turning Process Simulator written by Sung-Gwang Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Virtual Three Axis Milling Process Simulation And Optimization
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2004
Virtual Three Axis Milling Process Simulation And Optimization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The ultimate goal in the manufacturing of a part is to achieve an economic production plan with precision and accuracy in the first attempt at machining. A physics-based comprehensive modeling of the machining processes is a fundamental requirement in identifying optimal cutting conditions which result in high productivity rates without violating accuracy throughout the part production process. This thesis presents generalized virtual simulation and optimization strategies to predict and optimize performance of milling processes up to 3-axis. Computationally efficient mathematical models are introduced to predict milling process state variables such as chip load, force, torque, and cutting edge engagement at discrete cutter locations. Process states are expressed explicitly as a function of helical cutting edge - part engagement, cutting coefficient and feedrate. Cutters with arbitrary geometries are modeled parametrically, and the intersection of helical cutting edges with workpiece features are evaluated either analytically or numerically depending on geometric complexity. The dynamics of generalized milling operations are modeled and the stability of the process is predicted using both time and frequency domain based models. These algorithms enable rapid simulation of milling operations in a virtual environment as the part features vary. In an effort to reduce machining time, a constraint-based optimization scheme is proposed to maximize the material removal rate by optimally selecting the depth of cut, width of cut, spindle speed and feedrate. A variety of user defined constraints such as maximum tool deflection, torque/power demand, and chatter stability are taken into consideration. Two alternative optimization strategies are presented: pre-process optimization provides allowable depth and width of cut during part programming at the computer aided manufacturing stage using chatter constraint, whereas the post-process optimization tunes only feedrate and spindl.