Gear Measurement and Inspection
40 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of the Parkinson Gear Tester?

  • To measure the angular differences of gears
  • To measure the straightness of surfaces
  • To record the radial variations of the gear
  • To test the quality and accuracy of gears (correct)

    • What type of gears is the Parkinson Gear Tester mainly suitable for?

  • Helical gears and bevel gears
  • All types of gears
  • Worm gears and complex gear geometries
  • Spur gears and simple gear profiles (correct)

    • What is a limitation of the Parkinson Gear Tester?

  • It is fully automated, requiring no human intervention
  • It is manually operated, which can introduce human error (correct)
  • It can test all types of gears accurately
  • It is only used for high-volume production environments

    • What is an application of the Autocollimator?

    <p>To measure the straightness and flatness of surfaces</p> Signup and view all the answers

    What is the purpose of the spring pressure in the Parkinson Gear Tester?

    <p>To regulate the movement of the right mandrel slide</p> Signup and view all the answers

    What is recorded on the chart in the Parkinson Gear Tester?

    <p>The movement of the floating carriage</p> Signup and view all the answers

    What is a limitation of the Autocollimator?

    <p>It is not suitable for measuring the quality of gears</p> Signup and view all the answers

    What is a feature of the Parkinson Gear Tester?

    <p>It has a dial indicator to measure radial variation</p> Signup and view all the answers

    What is the primary function of an optical dividing head?

    <p>To accurately divide a circle into equal parts</p> Signup and view all the answers

    Which component of an optical dividing head is used to select specific holes on the index plate?

    <p>Sector Arms</p> Signup and view all the answers

    What is the main advantage of using an optical dividing head?

    <p>Higher precision in angular measurements and divisions</p> Signup and view all the answers

    What is the primary application of a toolmaker's microscope?

    <p>Inspecting and measuring small parts, tools, and components</p> Signup and view all the answers

    What is the function of the micrometer head in a toolmaker's microscope?

    <p>To measure the stage movement</p> Signup and view all the answers

    Why is regular cleaning important for an optical dividing head?

    <p>To ensure the accuracy of angular measurements and divisions</p> Signup and view all the answers

    What is the purpose of the sector arms in an optical dividing head?

    <p>To select specific holes on the index plate</p> Signup and view all the answers

    What is the advantage of using a toolmaker's microscope in manufacturing and quality control?

    <p>Higher magnification and accuracy</p> Signup and view all the answers

    What is the primary focus of gear measurement?

    <p>Dimensional accuracy and eccentricity</p> Signup and view all the answers

    What is the consequence of poorly machined gear teeth?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of a standard roller in tooth space?

    <p>To check parallelism off a surface plate</p> Signup and view all the answers

    What is the principle of the Parkinson Gear Tester?

    <p>To mount a standard gear on a fixed vertical spindle</p> Signup and view all the answers

    What is the function of the spring pressure in the Parkinson Gear Tester?

    <p>To maintain the gears in mesh</p> Signup and view all the answers

    What is the purpose of the dial indicator in the Parkinson Gear Tester?

    <p>To measure variations in center distance</p> Signup and view all the answers

    What type of gears can be tested using the Parkinson Gear Tester?

    <p>Spur gears</p> Signup and view all the answers

    What is the alternative to the dial indicator in the Parkinson Gear Tester?

    <p>Auto-graphic recorder</p> Signup and view all the answers

    What is the primary function of the stage in a toolmaker's microscope?

    <p>To bring the area of interest under the optical system</p> Signup and view all the answers

    What is the main advantage of a toolmaker's microscope?

    <p>High precision and versatility</p> Signup and view all the answers

    What type of interferometer is commonly used for measuring small changes in distance or refractive index?

    <p>Michelson Interferometer</p> Signup and view all the answers

    What is the purpose of calibration in a toolmaker's microscope?

    <p>To ensure accuracy of measurements</p> Signup and view all the answers

    What is the principle of interferometry?

    <p>Interference of light waves</p> Signup and view all the answers

    What is the main application of a toolmaker's microscope in quality control?

    <p>To verify the accuracy of manufactured components</p> Signup and view all the answers

    What is the function of the coherent light source in interferometry?

    <p>To produce light waves with a constant phase difference</p> Signup and view all the answers

    What type of toolmaker's microscope is used for measuring micro-machined parts?

    <p>Measuring Microscopes</p> Signup and view all the answers

    What is the main application of the Sagnac Interferometer?

    <p>Measuring rotation rates in navigation systems</p> Signup and view all the answers

    What is an advantage of Interferometry?

    <p>It is a non-contact measurement method</p> Signup and view all the answers

    What is a disadvantage of Interferometry?

    <p>It is sensitive to environmental factors</p> Signup and view all the answers

    What is the importance of surface texture in modern engineering products?

    <p>It influences the functioning of the machined parts</p> Signup and view all the answers

    What is a reason for controlling surface texture?

    <p>To reduce the initial wear of parts</p> Signup and view all the answers

    What is measured in Fiber Optics using Interferometry?

    <p>The properties of optical fibers and components</p> Signup and view all the answers

    What is a field of application where Interferometry is used?

    <p>Biology and Medicine</p> Signup and view all the answers

    What is required to maintain the accuracy of Interferometry measurements?

    <p>Regular calibration and environmental control</p> Signup and view all the answers

    Study Notes

    Gear Measurement

    • Importance of paying attention to raw material, production cycle, machining, heat treatment, cutting, and surface finish of teeth for proper gear inspection
    • Key dimensional accuracy checks: face width, bore, hub, length, and outside diameter
    • Eccentricity and concentricity of blanks are crucial, and side faces should be true to the bore
    • Additional measurements for precise gears: tip radius, shape of root, and surface finish

    Good Alignment of Each Tooth

    • Importance of even load distribution over the face of the gear
    • Poor tooth alignment can lead to high bearing stresses and concentrated load on one edge
    • Checking tooth alignment using a standard roller and surface plate

    Parkinson Gear Tester

    • Principle: measuring gear variations using a standard gear on a fixed spindle and the gear to be tested on a sliding carriage
    • Movement of the sliding carriage indicates gear irregularities, which can be recorded using a dial indicator or a circular chart
    • Used for testing spur gears

    Limitations of Parkinson Gear Tester

    • Limited to simple gear types (e.g., spur gears) and not suitable for complex gear geometries
    • Manual operation may introduce human error
    • Limited measurement range and accuracy limitations
    • No advanced data recording and analysis capabilities
    • Slow and labor-intensive process
    • Subject to wear and tear, requiring regular calibration and maintenance
    • Cost and maintenance concerns
    • Single-purpose device

    Autocollimator

    • Optical instrument used for measuring small angular differences, changes, or deflections
    • Principle: using a collimating lens to project parallel light beams and measure reflected light
    • Applications:
      • Measuring straightness and flatness of surfaces
      • Precise angular indexing using polygons
      • Comparative measurements using master angles
      • Assessing squareness and parallelism of components
      • Measuring small linear dimensions

    Optical Dividing Head

    • Precision tool used for accurately dividing a circle into equal parts
    • Components:
      • Base
      • Spindle
      • Index plate
      • Sector arms
      • Optical system
      • Crank or handwheel
    • Working principle:
      • Mounting the workpiece
      • Setting the angle using the index plate and sector arms
      • Dividing the circle using the crank or handwheel
      • Verifying the angle using the optical system
    • Applications:
      • Gear cutting
      • Spline cutting
      • Tool grinding
      • Rotary table operations
    • Advantages:
      • High precision
      • Versatility
      • Repeatability

    Tool Makers Microscope

    • Highly precise optical instrument used for inspecting and measuring small parts, tools, and components
    • Components:
      • Optical system
      • Stage
      • Micrometer head
      • Illumination
      • Focusing mechanism
      • Measurement scales
      • Base
    • Working principle:
      • Placing the workpiece on the stage
      • Adjusting the stage using micrometer heads
      • Focusing the optical system
      • Illuminating the workpiece
      • Measuring dimensions using reticles or graduated scales
    • Applications:
      • Inspecting small parts
      • Tool and die making
      • Quality control
      • Research and development
      • Micro-machining
    • Advantages:
      • High precision
      • Versatility
      • Enhanced visibility
      • Ease of use
      • Durability

    Interferometry

    • Powerful technique for measuring small displacements, refractive index changes, surface irregularities, and other minute changes
    • Basic principles:
      • Interference of light waves
      • Coherent light source
      • Splitting and recombining light
    • Types of interferometers:
      • Michelson interferometer
      • Fabry-Pérot interferometer
      • Mach-Zehnder interferometer
      • Sagnac interferometer
    • Applications:
      • Metrology
      • Astronomy
      • Fiber optics
      • Material science
      • Biology and medicine
    • Advantages:
      • High precision
      • Non-contact measurement
      • Versatility
    • Disadvantages:
      • Sensitivity to environmental factors
      • Complex setup
      • Cost

    Surface Texture

    • Importance of controlling surface texture in modern engineering products
    • Influence of surface texture on:
      • Appearance
      • Corrosion resistance
      • Wear resistance
      • Fatigue resistance
      • Lubrication
      • Initial tolerance
      • Load carrying capacity
      • Noise reduction
    • Reasons for controlling surface texture:
      • Improving service life
      • Reducing fatigue resistance
      • Reducing initial wear

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the importance of gear measurement and inspection, including dimensional accuracy, eccentricity, and concentricity of gear blanks.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser