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Front Axle Kingpin Bush - Evaluation of Wear in Operating Conditions
Technical Paper
2021-26-0473
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In automobiles, front axle assembly is a main load bearing member and houses steering linkages. Front axle assembly has two main parts namely axle beam and axle arm, interconnected by a kingpin. This kingpin allows the rotation of axle arm during steering events. To avoid metal to metal contact between axle arm and kingpin, bushes are housed on the top and bottom half of the axle arm & in axle beam. Due to radial load and steering rotation, as a weak member, bushes will wear out faster. This affects the proper functioning of steering mechanism. Hence, the bushes need to be evaluated prior to its implementation in vehicle. In general, bushes are evaluated using Pin-On-Disc test as a comparative study, but it does not simulate exact boundary conditions as in vehicle. Next option is vehicle level validation but leads to more testing time and cost. Hence, as an optimized solution, the same vehicle operating conditions can be replicated in component level testing. Considering the boundary conditions & test requirements, a new test facility is developed to measure the wear and validate the bushes. This helps to evaluate different material combinations in the shortest possible time.
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Citation
Bakthavachalam, S., N, G., Narasimman, O., and R, S., "Front Axle Kingpin Bush - Evaluation of Wear in Operating Conditions," SAE Technical Paper 2021-26-0473, 2021, https://doi.org/10.4271/2021-26-0473.Data Sets - Support Documents
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References
- Dodds Colin , J. Structural Testing of Complete Vehicles, Aggregates and Components in the Laboratory -The Test Engineer’s Handbook Second 2015
- Ahire , P.R. , and Munde , K. H. Design and Analysis of Front Axle for Heavy Commercial Vehicle International Journal Of Engineering and Computer Science 5 7 2016 17333 17337
- Aghav , H.L. Life Prediction for Vertical and Braking loading of Front Axle of Heavy-Duty Truck International Journal of Engineering Science and Computing July 2016 http://ijesc.org/
- Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus, Designation: ASTM G 99 - 95a 2000