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Jiunnjyh Wang - One of the best experts on this subject based on the ideXlab platform.

  • effects of cutting conditions on dynamic cutting factor and process damping in milling
    International Journal of Machine Tools & Manufacture, 2011
    Co-Authors: Chaoyu Huang, Jiunnjyh Wang
    Abstract:

    Abstract This paper investigates how cutting conditions affect dynamic cutting factor and system process damping in a dynamic milling process. By considering variation of edge Plowing Force, a frequency domain method is presented to identify the dynamic cutting factor through measured vibration in a milling process, and cutting conditions most suitable for the identification experiments are also discussed. A series of experiments are carried out to investigate the effects of cutting conditions on the dynamic cutting factor. This factor is shown to be significantly affected by the cutting speed, but relatively independent of the feed per tooth and the radial depth of cut. An average process damping model is further constructed and shown to be effective in representing the time-varying damping function. The average process damping is shown to increase rapidly at lower cutting speed, but remain constant as the cutting speed beyond a critical value.

W A Knight - One of the best experts on this subject based on the ideXlab platform.

  • fundamentals of machining and machine tools
    2006
    Co-Authors: Geoffrey Boothroyd, W A Knight
    Abstract:

    CONVENTIONS USED IN THIS BOOK Standardization Introduction to the International (SI) System of Units MACHINE TOOLS AND MACHINING OPERATIONS Introduction Generating Motions of Machine Tools Machines Using Single-Point Tools Machines Using Multipoint Tools Machines Using Abrasive Wheels Summary of Machine Tool Characteristics and Machining Equations Problems References MECHANICS OF METAL CUTTING Introduction Terms and Definitions Chip Formation The Forces Acting on the Cutting Tool and Their Measurement Specific Cutting Energy Plowing Force and the "Size Effect" The Apparent Mean Shear Strength of the Work Material Chip Thickness Friction in Metal Cutting Analytical Modeling of Machining Operations Problems References TEMPERATURES IN METAL CUTTING Heat Generation in Metal Cutting Heat Transfer in a Moving Material Temperature Distribution in Metal Cutting The Measurement of Cutting Temperatures Problems References TOOL LIFE AND TOOL MATERIALS Introduction Progressive Tool Wear Forms of Wear in Metal Cutting The Tool Material Tool Geometries The Work Material High Speed Machining Hard Machining Problems References CUTTING FLUIDS AND SURFACE ROUGHNESS Cutting Fluids The Action of Coolants The Action of Lubricants Application of Cutting Fluids Cutting Fluid Maintenance Environmental Considerations Disposal of Cutting Fluids Dry Cutting and Minimum Quantity Lubrication Surface Roughness Tool Geometries for Improved Surface Finish Burr Formation in Machining Problems References ECONOMICS OF METAL-CUTTING OPERATIONS Introduction Choice of Feed Choice of Cutting Speed Tool Life for Minimum Cost and Minimum Production Time Estimation of Factors Needed to Determine Optimum Conditions Example of a Constant-Cutting-Speed Operation Machining at Maximum Efficiency Facing Operations Operations with Interrupted Cuts Economics of Various Tool Materials and Tool Designs Machinability Data Systems Limitations of Available Machinability Data Problems References NOMENCLATURE OF CUTTING TOOLS Introduction Systems of Cutting-Tool Nomenclature International Standard Problems References CHIP CONTROL Introduction Chip Breakers Prediction of Radius of Chip Curvature Prediction of Chip Breaking Performance Tool Wear During Chip Breaking Problems References MACHINE TOOL VIBRATIONS Introduction Forced Vibrations Self-Excited Vibrations (Chatter) Determination of Frequency Response Loci Dynamic Acceptance Tests for Machine Tools Improving Machine Tool Stability Problems References GRINDING Introduction The Grinding Wheel Effect of Grinding Conditions on Wheel Behavior Determination of the Density of Active Grains Testing of Grinding Wheels Dressing and Truing of Grinding Wheels Analysis of the Grinding Process Thermal Effects in Grinding Cutting Fluids in Grinding Grinding-Wheel Wear Nonconventional Grinding Operations Problems References MANUFACTURING SYSTEMS AND AUTOMATION Introduction Types of Production Types of Facilities Layout Types of Automation Transfer Machines Automatic Machines Numerically Controlled (NC) Machine Tools Comparison of the Economics of Various Automation Systems Handling of Components in Batch Production Flexible Manufacturing Systems Problems References COMPUTER-AIDED MANUFACTURING Introduction Scope of CAD/CAM Process-Planning Tasks Computer-Aided Process Planning Processing of NC Programs Computer-Aided NC Processing Numerical Control Processing Languages NC Programming Using APT-Based Languages Graphics-Based NC Processing Systems References DESIGN FOR MACHINING Introduction Standardization Choice of Work Material Shape of Work Material Shape of Component Assembly of Components Accuracy and Surface Finish Summary of Design Guidelines Cost Estimating for Machined Components Problems References NONCONVENTIONAL MACHINING PROCESSES Introduction Range of Nonconventional Machining Processes Ultrasonic Machining Water-Jet Machining Abrasive-Jet Machining Chemical Machining Electrochemical Machining Electrolytic Grinding Electrical-Discharge Machining Wire Electrical-Discharge Machining Laser-Beam Machining Electron-Beam Machining Plasma-Arc Cutting Comparative Performance of Cutting Processes Problems References NOMENCLATURE INDEX

Chaoyu Huang - One of the best experts on this subject based on the ideXlab platform.

  • effects of cutting conditions on dynamic cutting factor and process damping in milling
    International Journal of Machine Tools & Manufacture, 2011
    Co-Authors: Chaoyu Huang, Jiunnjyh Wang
    Abstract:

    Abstract This paper investigates how cutting conditions affect dynamic cutting factor and system process damping in a dynamic milling process. By considering variation of edge Plowing Force, a frequency domain method is presented to identify the dynamic cutting factor through measured vibration in a milling process, and cutting conditions most suitable for the identification experiments are also discussed. A series of experiments are carried out to investigate the effects of cutting conditions on the dynamic cutting factor. This factor is shown to be significantly affected by the cutting speed, but relatively independent of the feed per tooth and the radial depth of cut. An average process damping model is further constructed and shown to be effective in representing the time-varying damping function. The average process damping is shown to increase rapidly at lower cutting speed, but remain constant as the cutting speed beyond a critical value.

Kraner Martin - One of the best experts on this subject based on the ideXlab platform.

  • Modeling of Plowing Force with neural network
    M. Kraner, 2015
    Co-Authors: Kraner Martin
    Abstract:

    V uvodu sem opisal, zakaj sem se odločil za izdelavo nevronske mreže za izračun sil pri oranju. V nadaljevanju sem predstavil fizikalni proces pri oranju. Opisal sem enostaven približek pluga ter vlečne sile, ki se pojavljajo pri oranju, torej vlečno silo na plužno telo, lemež in rezilo. Nato sem opisal zgradbo nevronske mreže in uporabo modela nevronske mreže. Da bi lahko izračunali sile pri danih parametrih, sem nevronsko mrežo učil iz podatkov pridobljenih iz literature. Prav tako sem v nadaljevanju naredil preizkus s podatki oziroma meritvami iz literature. Nato sem primerjal rešitve in dobil zanimive rezultate, ki se jih lahko še dodela z vnovičnim učenjem nevronske mreže! Diplomska naloga tako predstavlja teoretični uvod k izdelavi učinkovite aplikacije za kmetovalce in proizvajalce plužnih teles za izračun sil na plužna telesa pri izbranih parametrih!The purpose of the thesis was to create a neural network and to train it to calculate Forces in Plowing depending on the speed and depth of Plowing as well as in relation to the type of soil. In the introduction, I described my decision to create a neural network for calculation of Forces in Plowing. I then described the physical process of Plowing, simple approximation of the plow, and Forces during Plowing including the traction Force on the Plowing component, coulter and the blade. I further described the construction of the neural network and the use of the neural network model. In order to calculate the Forces at the given parameters, the neural network was trained using data obtained from the literature. After training the neural network was tested with further data and measurements from literature. Interesting results were obtained from comparison of the neural network solutions, which could still be refined by retraining of the neural network! The thesis therefore represents a theoretical intruduction to manufacturing of an efficient application for farmers and producers of the ploughs for the calculation of Forces on the plow body in different conditions

Geoffrey Boothroyd - One of the best experts on this subject based on the ideXlab platform.

  • fundamentals of machining and machine tools
    2006
    Co-Authors: Geoffrey Boothroyd, W A Knight
    Abstract:

    CONVENTIONS USED IN THIS BOOK Standardization Introduction to the International (SI) System of Units MACHINE TOOLS AND MACHINING OPERATIONS Introduction Generating Motions of Machine Tools Machines Using Single-Point Tools Machines Using Multipoint Tools Machines Using Abrasive Wheels Summary of Machine Tool Characteristics and Machining Equations Problems References MECHANICS OF METAL CUTTING Introduction Terms and Definitions Chip Formation The Forces Acting on the Cutting Tool and Their Measurement Specific Cutting Energy Plowing Force and the "Size Effect" The Apparent Mean Shear Strength of the Work Material Chip Thickness Friction in Metal Cutting Analytical Modeling of Machining Operations Problems References TEMPERATURES IN METAL CUTTING Heat Generation in Metal Cutting Heat Transfer in a Moving Material Temperature Distribution in Metal Cutting The Measurement of Cutting Temperatures Problems References TOOL LIFE AND TOOL MATERIALS Introduction Progressive Tool Wear Forms of Wear in Metal Cutting The Tool Material Tool Geometries The Work Material High Speed Machining Hard Machining Problems References CUTTING FLUIDS AND SURFACE ROUGHNESS Cutting Fluids The Action of Coolants The Action of Lubricants Application of Cutting Fluids Cutting Fluid Maintenance Environmental Considerations Disposal of Cutting Fluids Dry Cutting and Minimum Quantity Lubrication Surface Roughness Tool Geometries for Improved Surface Finish Burr Formation in Machining Problems References ECONOMICS OF METAL-CUTTING OPERATIONS Introduction Choice of Feed Choice of Cutting Speed Tool Life for Minimum Cost and Minimum Production Time Estimation of Factors Needed to Determine Optimum Conditions Example of a Constant-Cutting-Speed Operation Machining at Maximum Efficiency Facing Operations Operations with Interrupted Cuts Economics of Various Tool Materials and Tool Designs Machinability Data Systems Limitations of Available Machinability Data Problems References NOMENCLATURE OF CUTTING TOOLS Introduction Systems of Cutting-Tool Nomenclature International Standard Problems References CHIP CONTROL Introduction Chip Breakers Prediction of Radius of Chip Curvature Prediction of Chip Breaking Performance Tool Wear During Chip Breaking Problems References MACHINE TOOL VIBRATIONS Introduction Forced Vibrations Self-Excited Vibrations (Chatter) Determination of Frequency Response Loci Dynamic Acceptance Tests for Machine Tools Improving Machine Tool Stability Problems References GRINDING Introduction The Grinding Wheel Effect of Grinding Conditions on Wheel Behavior Determination of the Density of Active Grains Testing of Grinding Wheels Dressing and Truing of Grinding Wheels Analysis of the Grinding Process Thermal Effects in Grinding Cutting Fluids in Grinding Grinding-Wheel Wear Nonconventional Grinding Operations Problems References MANUFACTURING SYSTEMS AND AUTOMATION Introduction Types of Production Types of Facilities Layout Types of Automation Transfer Machines Automatic Machines Numerically Controlled (NC) Machine Tools Comparison of the Economics of Various Automation Systems Handling of Components in Batch Production Flexible Manufacturing Systems Problems References COMPUTER-AIDED MANUFACTURING Introduction Scope of CAD/CAM Process-Planning Tasks Computer-Aided Process Planning Processing of NC Programs Computer-Aided NC Processing Numerical Control Processing Languages NC Programming Using APT-Based Languages Graphics-Based NC Processing Systems References DESIGN FOR MACHINING Introduction Standardization Choice of Work Material Shape of Work Material Shape of Component Assembly of Components Accuracy and Surface Finish Summary of Design Guidelines Cost Estimating for Machined Components Problems References NONCONVENTIONAL MACHINING PROCESSES Introduction Range of Nonconventional Machining Processes Ultrasonic Machining Water-Jet Machining Abrasive-Jet Machining Chemical Machining Electrochemical Machining Electrolytic Grinding Electrical-Discharge Machining Wire Electrical-Discharge Machining Laser-Beam Machining Electron-Beam Machining Plasma-Arc Cutting Comparative Performance of Cutting Processes Problems References NOMENCLATURE INDEX