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Secrets of 5-Axis Machining + Bonus CD - Karlo Arpo [2008, PDF, ENG]
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Secrets of 5-Axis Machining + Bonus CD
Секреты 5-осевой обработки #777 Год: 2008 Автор: Karlo Arpo Издательство: Industrial Press,Ink. ISBN: ISBN 978-0-8311-3375-7 Язык: Английский Формат: PDF Качество: Изначально компьютерное Количество страниц: 177 Описание: Are you utilizing 5-axis machining? Could your shop benefit from the efficiency and power that 5-axis machining offers? The majority of people not embracing this technology lack a true understanding of 5-axis practices. There are many common misconceptions on the subject, and the intent of this book is to demystify 5-axis machining and bring it within the reach of anyone interested in using the technology to its full potential. The information presented in this book was gathered during 30 years of hands-on experience in the metal-working manufacturing industry — bridging countries, continents, and multiple languages (both human and G-code.) The author worked in Hungary, Germany, Canada, and the USA, specializing in multiaxis solutions. He spent many years setting up, programming, and repairing CNC equipment, and has used a number of different CAD/CAM systems. He has worked as a self-employed multiaxis consultant, as well as directly for CGTech (the makers of VERICUT®) and CNC Software Inc. (the makers of Mastercam®.) The author has instructed countless multiaxis training classes over the past decade. These classes covered topics such as operating CNC equipment, programming CNC equipment, both manually and with CAD/CAM systems, and building virtual machines with different verification systems. Through the years, the author has met many professionals around the world and has come to a realization that they all have the same questions, misconceptions, and concerns, when it comes to 5-axis machining. The need for unbiased information on the subject became apparent. Up to this point, the best way to get information on 5-axis machining was to talk to peers in the industry, in the hope that they would share what they had learned. Visiting industrial trade shows and talking to machine tool and CAD/CAM vendors are other options — except that these people all give their individual points of view and will promote their own machine or solution. Everybody claims to have the best mouse-trap, and it is left to the individual to choose the right one. This book is not a training manual for any particular machine or CAD/CAM system. Rather, it is an overview of multiaxis machine types and the common control methods that CAD/CAM systems use to drive the machines. The book will guide you through this realm, from basic to complex concepts, and will provide information to help you choose the right tools, including the machine, work-holding method, CAD/CAM system, and machine simulation package that will best suit your specific application. The book contains numerous illustrations to help you to precisely implement these tools. Chapter 1: History of 5-Axis Machines........3 Common Misconceptions........................4 Reasons to Use Multiaxis Machines.................8 Chapter 2: Know Your Machine.............13 Multiaxis Machine Configurations.................14 Table/Table Multiaxis Milling Machines..............18 Machine Rotary Zero Position (MRZP)..............21 Nesting Positions.............................26 Rotary Table Dynamic Fixture Offset...............27 Head/Table Multiaxis Milling Machines..............31 Head/Head Multiaxis Milling Machines..............36 Finding the Pivot Distance......................37 4-Axis Machines.............................39 General Maintenance & Issues for Multiaxis Machines ... 40 Milling Machines With Five- or More-Axes............43 Chapter 3: Cutting Strategies..............45 Chapter 4: Indexing Multiaxis Toolpaths.....49 Indexing Methods ...........................51 How CAD/CAM Systems Handle Indexing Work........56 Machine Coordinate Systems....................57 Machine Home Position ......................57 Active Coordinate System ....................57 Machine Rotary Center Point...................60 CAD/CAM System Origin.......................60 Synchronizing Machine and CAD/CAM Coordinate Systems . 61 Chapter 5: Simultaneous Multiaxis Toolpaths. .65 The Optimum Work Envelope....................70 Feedrates..................................72 Inverse Time Feedrate.......................74 Post Processors..............................76 Chapter 6: Common Simultaneous Multiaxis CAM Toolpath Controls.......................79 Cut Patterns................................79 Tool Axis Control.............................86 Tool Tip Control..............................90 Collision Control.............................93 Additional Multiaxis Issues and Controls.............98 Dovetail Effect.............................98 Cutting Direction..........................100 Multiaxis Roughing.........................101 Chapter 7: Machine Simulation............103 G-code Simulation Versus CAM Simulation..........105 Configuring Virtual Machines For Simulation.........105 Virtual Machine Building.......................106 The Skeleton.............................106 Components vs. Models.....................107 Machine Simulation Interfaces..................116 Using Machine Simulation.....................117 Chapter 8: Selecting The Right Machine For Your Application..............................119 Head/Head Machines (with long X or Y - axis linear travel, but limited rotary axes travel)..................121 Head/Table Machines (with long X-axis travel).......123 Head/Table Machines ........................126 Rotary Table - Tilting Head Combinations..........128 Table/Table Machines.........................132 Gantry Type Head/Head Machines................134 Chapter 9: Choosing a CAD/CAM System For Your Application............................137 Special Purpose Software......................137 CAD/CAM Toolbox...........................139 Multiaxis CAD/CAM Considerations...............139 Multiaxis CAM..............................140 Multiaxis CAD/CAM Training....................144 Behind the Scenes: CAD/CAM Software Development . . 145 General Guidelines for Researching CAD/CAM Software. . 146 Chapter 10: Putting It All Together.........149 Why Use Multiaxis Machining Techniques?..........152 What is a Standard 5-Axis Machine?..............153 What is the Standard Axis Convention?............154 What are the Three Major Multiaxis Machine Types? . . . 154 What are the Major Building Blocks of a CNC Machine? . 156 What are the Most Important Physical Positions of a Multiaxis Machine?..........................157 What Tools are Needed to Find MRZP?.............159 Description of Indexing/Rotary Positioning Work......159 What is a Post Proccessor?.....................159 Definition of an Axis.........................160 Defining a Simultaneous 5-axis Toolpath...........160 What are the Three Common Simultaneous Multiaxis CAM Toolpath Controls............................161 Multiaxis Machine Offsets......................161 Finding Machine Rotary Zero Position..............162 Finding the Pivot Distance.....................164 Indexing/Rotary Position Work Overview...........166 Picking a CAD/CAM System for Multiaxis Work.......166 Machine Simulation..........................167 Conclusion................................167 Machine Simulation
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