Machining Wheel Hub For Workholding Device Design
Hemanth M, P R Dheeraj, Hamritha S, Rajesh B and Vamshi Krishna S R from Department of Industrial Engineering and Management, M S Ramaiah Institute of Technology, Bangalore, India present a research on designing and manufacturing workholding device for Wheel Hub for automotive.
Introduction
Wheel hub powers better steering, which has become a must-have for automotive. The industry witnessed a continuous research and innovation since the late 19th century in automotive. It is one of the most dynamic fields, accounting for at least one in ten jobs in industrialised countries.
The industry integrates advanced technologies in vehicles to reduce emissions and ensure customers’ safety. However, in a world where material fabrication and metal heat treatment are outsourced, engineers need to be sure materials are properly processed before use.
The Wheel Hub serves as the glue between the wheel and axle. Wheels are attached with studs to the hub assembly. The hub assembly fits on the axle, connecting the wheel assembly to the rest of the car; bridging the wheel and the entire vehicle.
If one part fails; it creates a ripple effect. A hub is not a single piece of hardware. Instead, it needs a handful of other parts to do its job.
It is mounted with bearings; cylindrical pieces packed with grease that reduces friction during wheel spin. The Wheel Hub bearing is used to increase fuel efficiency, providing smooth and safe ride for passengers with Anti-lock Braking Systems (ABS).
This research is related to the design of the workholding device for manufacturing the Wheel Hub section that is too long. The design uses the collet mechanism, improvements include adding a pneumatic cylinder for up and down mechanism, for top clamping of the output loader on the top plate that helps hold the component firmly for operations.
The operator ensures proper alignment of the forged component placed and reduces the rate of scrap from misalignment after manufacturing. This workholding provides good working area for the operator in component manufacturing.
Methodology
The idea was to develop a workholding device for manufacturing Wheel Hub part, which can be manufactured to the exact dimensions of the drawing using the GD&T tools.
A standard operating procedure was adopted till the final manufacturing stage. All operations were carried out on CNC and VMC machine, in case of any burs, auto-deburring was carried out at specific speed.
This workholding device is manufactured for a specific machine. The design of this fixture is drafted by keeping all machining considerations, movements and factors. The final working of this workholding was evaluated and specific planning for mass production of four components in a single run was also studied.
Read more here at page 32
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