Design and analysis of a jig testing for automotive coil spring static

Mohd Said, Mohamad Rashdan (2018) Design and analysis of a jig testing for automotive coil spring static. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Coil spring is the main part on suspension system to act as a cushion to absorb the shock when bumping on the road. To increase performance of coil springs and avoid spring failure when running on the road, manufacturer needs to perform test. Type of test performed is compression test. By using Universal Testing Machine this type of test may be perform but there is no jig to place coil spring when compression test. Focused on this research to design, analysis and fabricate jig testing for automotive coil spring static. The jig was involve in designing include two part which is upper and lower jig. Each jig has a pole act as holder if spring failure or fracture when compression test. Catia V5 software use to design both jig in 3D. The product design, assigns as steel. Some refinement and improvement on the design was done to achieve weight reduction. The jig has three design and third design approved as a final design before analysis. The analysis of design performed by using Catia Generative Structure Analysis selected static analysis to determine jig maximum value of von mises stress (nodal value). The determination of analysis product is achieved, that allow fabrication procedure involves cutting, welding and finishing process for jig. For casing it involve bending and drilling process. Actual test of jig on UTM machine was perform to determine stress and strain for coil spring by using compression test. The result of observation on compression test show the jig did not failure such as bending or fracture.

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