For brake design assembly of three parts illustrated below, discuss the manufact
ID: 2086895 • Letter: F
Question
For brake design assembly of three parts illustrated below, discuss the manufacturing of the 1) hub, 2) return springs, and 3) brake lining part. (a) Describe the manufacturing processes for the (hub, return springs, and brake lining) parts and why you would select the process. (b) Recommend the materials that could be used for the (hub, return springs, and brake lining) parts and your reason for it, (c) How are these parts assembled with the rest of the parts? Describe the potential manufacturing process. [1 to 2 pages text per part maximum plus 2 pages sketches or figures maximum] Return springs Wheel cylinder Parking brake actuating lever Hold-down spring and clip Brake lining Push rod- Adjustment retaining spring Brake shoe - Hub Star wheel adjusting nutExplanation / Answer
a) Brake hub is made by casting. After casting it is machined and surface heat treated to harden outer surface
Return springs are made by winding spring steel with low allowing element Mn around a rod. Thicker wires can be coiled to spring if heated. Then it is hardened by quenching ie sudden cooling and then tempering and then ends are ground. Then shot peening is done to enhance fatigue resistance and to increase servicalility.
Brake lining is made of metal matrix composites. They can be manufactured by powder metallurgy, casting, friction stir processing etc. They abrasion resistant.
b) Brake hub is made of alloy steel with Cr or No content. This enhances wear properties.
Spring steel can also be made using high carbon steel. For a spring steel strength will be high.
c) For the functionality of brake initially assembly of individual like brake caller fitted with cylinder is done. Then each sub assemblies, each having individual assemblies assembled altogether.
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