ANALYSIS OF TOLERANCE IN ASSEMBLY OF ANG-FIXED MILLING VISE VA-5 AT PT PRESA GENTA ENGINEERING
PT Presa Genta Engineering (PT PGE) is a company engaged in the manufacturing of automotive components. In carrying out orders, PT PGE performs manufacturing processes without applying tolerances. Evaluation of the variations in separately produced components with different machine accuracies is...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/74887 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PT Presa Genta Engineering (PT PGE) is a company engaged in the manufacturing
of automotive components. In carrying out orders, PT PGE performs
manufacturing processes without applying tolerances. Evaluation of the variations
in separately produced components with different machine accuracies is also not
conducted, leading to longer processing time as it goes through the physical
prototype design phase and component adjustments that do not meet specifications.
Market competition requires a short product development duration, necessitating
the shift from physical prototypes to digital ones. In an effort to prevent difficult-to-
control deviations from the early stages of product development, a tolerance
analysis system is designed to enforce tolerances and evaluate these
determinations.
The tolerance analysis system design is conducted on a case study product, the
Vertex Ang-Fixed Milling Vise VA-5. The research begins with the measurement of
vise components and proceeds with the identification of mechanisms and
determination of geometric requirements. These geometric requirements are
processed into tolerance specifications, followed by determining the tolerance
values using the constant precision factor (CPF) method. Tolerance analysis is
performed using two models, namely, vector loop and tolerance stack, with the
Solidworks software.
Based on the data processing, the results show that the vector loop model produces
variations with a mean of 1.1681 for the worst-case method and 0.8258 for the root
sum square (RSS) method. On the other hand, the tolerance stack model yields
means of 1.0931 for the worst-case method and 0.7988 for RSS. The vector loop
model has a tighter tolerance range compared to the tolerance stack model, by
6.24% for the worst-case method and 3.26% for RSS.
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