Podcast
Questions and Answers
What is the primary function of an optical dividing head?
What is the primary function of an optical dividing head?
- To inspect and measure small parts and tools
- To divide a circle into equal parts with high precision (correct)
- To verify the parallelism and squareness of components
- To set angles and divisions for machine tool adjustments
What is the role of the sector arms in an optical dividing head?
What is the role of the sector arms in an optical dividing head?
- To rotate the spindle and index plate
- To measure linear dimensions of the workpiece
- To provide a stable platform for the entire apparatus
- To select specific holes on the index plate (correct)
What is the main advantage of using an optical dividing head in gear cutting?
What is the main advantage of using an optical dividing head in gear cutting?
- Reduced labor requirements
- Increased production speed
- Cost-effectiveness
- Ensuring gears have the correct number of teeth and spacing (correct)
What is the purpose of the micrometer head in a toolmaker's microscope?
What is the purpose of the micrometer head in a toolmaker's microscope?
What is the main application of a toolmaker's microscope?
What is the main application of a toolmaker's microscope?
Which of the following is NOT a maintenance requirement for an optical dividing head?
Which of the following is NOT a maintenance requirement for an optical dividing head?
What is the role of the focusing mechanism in a toolmaker's microscope?
What is the role of the focusing mechanism in a toolmaker's microscope?
What is the primary benefit of using an optical dividing head in tool grinding?
What is the primary benefit of using an optical dividing head in tool grinding?
What is the primary importance of controlling the outside diameter of a gear blank?
What is the primary importance of controlling the outside diameter of a gear blank?
What happens when the teeth of a gear are machined poorly?
What happens when the teeth of a gear are machined poorly?
What is the primary limitation of the Parkinson Gear Tester in terms of gear type?
What is the primary limitation of the Parkinson Gear Tester in terms of gear type?
What is the purpose of the movable slide in a gear tester?
What is the purpose of the movable slide in a gear tester?
What is the purpose of the spring pressure in the Parkinson Gear Tester?
What is the purpose of the spring pressure in the Parkinson Gear Tester?
What is the principle of the Parkinson Gear Tester?
What is the principle of the Parkinson Gear Tester?
What is the function of the dial indicator on the right in the Parkinson Gear Tester?
What is the function of the dial indicator on the right in the Parkinson Gear Tester?
What is the purpose of the waxed paper recorder in the Parkinson Gear Tester?
What is the purpose of the waxed paper recorder in the Parkinson Gear Tester?
What is the consequence of not controlling the eccentricity of a gear blank?
What is the consequence of not controlling the eccentricity of a gear blank?
What is the Autocollimator used for?
What is the Autocollimator used for?
What is the purpose of checking the tooth alignment in a gear?
What is the purpose of checking the tooth alignment in a gear?
What is the principle of working of the Autocollimator?
What is the principle of working of the Autocollimator?
What is the alternative to using a dial indicator in a Parkinson Gear Tester?
What is the alternative to using a dial indicator in a Parkinson Gear Tester?
What type of gears can be tested using a Parkinson Gear Tester?
What type of gears can be tested using a Parkinson Gear Tester?
What is a limitation of the Parkinson Gear Tester in terms of measurement range?
What is a limitation of the Parkinson Gear Tester in terms of measurement range?
What is a limitation of the Parkinson Gear Tester in terms of data recording and analysis?
What is a limitation of the Parkinson Gear Tester in terms of data recording and analysis?
What is the primary function of the micrometer heads in a toolmaker's microscope?
What is the primary function of the micrometer heads in a toolmaker's microscope?
Which of the following is NOT an advantage of a toolmaker's microscope?
Which of the following is NOT an advantage of a toolmaker's microscope?
What is the primary purpose of calibration in a toolmaker's microscope?
What is the primary purpose of calibration in a toolmaker's microscope?
What is the principle behind interferometry?
What is the principle behind interferometry?
What is the purpose of a coherent light source in interferometry?
What is the purpose of a coherent light source in interferometry?
Which type of interferometer is highly sensitive and used for measuring small spectral features?
Which type of interferometer is highly sensitive and used for measuring small spectral features?
What is the primary application of a toolmaker's microscope in research and development?
What is the primary application of a toolmaker's microscope in research and development?
Which type of toolmaker's microscope is equipped with advanced measurement capabilities and often connected to digital readouts or computer systems?
Which type of toolmaker's microscope is equipped with advanced measurement capabilities and often connected to digital readouts or computer systems?
What is the primary application of the Sagnac Interferometer?
What is the primary application of the Sagnac Interferometer?
In which field is interferometry used to create high-resolution cross-sectional images of biological tissues?
In which field is interferometry used to create high-resolution cross-sectional images of biological tissues?
What is a disadvantage of interferometry due to environmental factors?
What is a disadvantage of interferometry due to environmental factors?
What is a crucial step in maintaining the accuracy of interferometric measurements?
What is a crucial step in maintaining the accuracy of interferometric measurements?
What is the primary reason for controlling surface texture in modern engineering products?
What is the primary reason for controlling surface texture in modern engineering products?
What is influenced by the surface texture of machined parts?
What is influenced by the surface texture of machined parts?
In which field is interferometry used to measure the properties of materials at a microscopic level?
In which field is interferometry used to measure the properties of materials at a microscopic level?
What is an advantage of interferometry in precision measurement?
What is an advantage of interferometry in precision measurement?
Flashcards are hidden until you start studying
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.
