Page 146 - CITS - Fitter - Trade Theory

FITTER - CITS

• Controlled Material Removal: Operators adjust parameters such as spindle speed, stroke length, and
abrasive grit size to control material removal rates and achieve the desired surface finish and dimensional
accuracy.
• Final Inspection: After honing, the workpiece is inspected for dimensional accuracy, surface finish, and
other quality parameters. Any necessary adjustments or additional honing passes may be performed to
meet specifications.
• Cleaning and Finishing: The workpiece is cleaned to remove honing oil and debris. Additional finishing
processes, such as deburring or polishing, may be applied as needed to achieve the desired surface quality.
• Application of lapping and honing:

The applications of lapping and honing span across various industries where precision, fine finishes, and dimen-
sional accuracy are critical. Here are some common applications for each process:
5 Applications of Lapping:
• Optics Manufacturing: Lapping is extensively used in the fabrication of optical components such as lenses,
mirrors, and prisms. It ensures the surfaces are perfectly flat and polished to achieve optimal light transmis-
sion and image quality.
• Semiconductor Industry: Lapping is employed to create flat and smooth surfaces on semiconductor wa-
fers, ensuring uniformity and precise thickness for subsequent processing steps.

• Precision Bearings: Lapping is utilized in the manufacturing of precision bearings to achieve tight toler-
ances and smooth surfaces, reducing friction and enhancing performance.
• Aerospace Components: Lapping is used for critical aerospace components like turbine blades, where
precise dimensions and smooth surfaces are essential for efficient operation and reliability.
• Tool and Die Making: Lapping is applied in tool and die making to produce precision Molds, dies, and
inserts with fine surface finishes for manufacturing various products.

6 Applications of Honing:
• Automotive Engine Cylinders: Honing is commonly used to finish internal combustion engine cylinders,
ensuring precise bore dimensions and surface finishes for optimal piston ring sealing and engine perfor-
mance.
• Hydraulic Cylinders: Honing is employed in the production of hydraulic cylinders to achieve accurate bore
dimensions and smooth surface finishes, minimizing friction and leakage for efficient hydraulic operation.
• Firearm Barrels: Honing is utilized in firearm manufacturing to finish the bore of gun barrels, ensuring
uniformity, precise dimensions, and optimal rifling for accuracy and performance.
• Pneumatic Components: Honing is used in the production of pneumatic cylinders and valves to achieve
precise bore dimensions and smooth surface finishes, ensuring reliable pneumatic system operation.
• Machine Tool Spindles: Honing is applied to machine tool spindles to improve the bore’s roundness,
straightness, and surface finish, reducing vibration and enhancing machining accuracy.

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CITS : CG & M - Fitter - Lesson 23 CITS : CG & M - Fitter - Lesson 23