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Finite Element Method (FEM) Simulation of Modified Mechanical Jig on Upper Backer Press Process at PT XYZ Indonesia to Reduce the Surface Defect on Piano Sideboard

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Abstract:

Upper Backer Press is one of the key production processes in piano manufacturing at PT. XYZ Indonesia. In the current configuration, the pressing process uses pneumatic pressure that acts directly on the upper surface of the sideboard. Surface defects, known as “uki” were observed on the sideboard after pressing due to an uneven distribution of contact pressure. To address the problem, a modified mechanical jig has been proposed, and a finite element simulation has been conducted to predict the contact distribution for each jig configuration. The results indicate that the optimized design of the modified jig distributes contact pressure uniformly. The modified design reduces defects and improves the quality of the piano sideboard.

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Periodical:

Advances in Science and Technology (Volume 180)

Pages:

97-103

DOI:

https://doi.org/10.4028/p-2NtFxm

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Online since:

July 2026

Authors:

Irfan Aditya Dharma*, Paryana Puspaputra, Gagas Arya Amrizal

Keywords:

Contact Pressure, Finite Element Method (FEM), Jig, Sideboard, Surface Defect

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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