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Option 3 : Charging

Explanation:

  • Lapping is a precision finishing operation carried out using fine abrasive materials.
  • This process:
    • Improves geometric accuracy
    • Refines surface finish
    • Assists in achieving a high degree of dimensional accuracy
    • Improves the quality of fit between the mating components
  • While lapping, the lapping compound collects in the serrations and rolls in and out as the work is moved.
  • Before commencing the lapping of the component, the cast iron plates should be charged with abrasive particles.
  • Charging is a process by which the abrasive particles are embedded on to the surface of the laps which are comparatively softer than the components being lapped.

[ alt="Fitter 35 25Q Hindi - Final images Q1" src="//storage.googleapis.com/tb-img/production/18/09/Fitter_35_25Q_Hindi%20-%20Final_images_Q1.PNG">

  • Flat surfaces are hand lapped using a lapping plate having grooves to retain the lapping paste.

[ alt="Fitter 35 25Q Hindi - Final images Q1a" src="//storage.googleapis.com/tb-img/production/18/09/Fitter_35_25Q_Hindi%20-%20Final_images_Q1a.PNG">

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