Streamlining Production: ECRS Approach to Enhancing Efficiency in Case Tank Sub Weld of Hydraulic Excavator

Chutharat Wonginyoo; Prapatson Bumpen; Pilada Wangphanich; Ninlawan Choomrit

doi:10.55003/ETH.420401

Authors

Chutharat Wonginyoo Faculty of Engineering, Srinakharinwirot University, Thailand
Prapatson Bumpen Faculty of Engineering, Srinakharinwirot University, Thailand
Pilada Wangphanich Faculty of Engineering, Srinakharinwirot University, Thailand
Ninlawan Choomrit Faculty of Engineering, Srinakharinwirot University, Thailand

DOI:

https://doi.org/10.55003/ETH.420401

Keywords:

Fuel tank, Fixture, Finite element analysis, Analytic hierarchy process

Abstract

This research aimed to reduce the production time in the manufacturing process of fuel tanks, with a focus on enhancing the efficiency of the process to better meet customer demands. A study of the production process revealed that the primary issue was in the welding stage at the top of the tank using a robot, which took 2 hours and 45 minutes. Almost half (1 hour 22 minutes) of the time were spent on setting the position of the workpiece—a step that must be repeated each time a new workpiece was introduced. This significantly contributed to reducing throughput and increasing labor costs. To address this issue, the research team applied the ECRS concept to analyze and streamline the production process by eliminating unnecessary steps. Consequently, the team designed and developed a workpiece holding fixture to assist in the welding process. This fixture ensured the workpiece was positioned accurately without the need for repeated setup. Two conceptual designs of the fixture were initially developed and evaluated using FEA. After evaluation by engineers and welding staff, using AHP, the best option was determined. As a result of this improvement, cycle time in robotic welding was reduced to 1 hour and 23 minutes a 49.26% reduction.

References

T. Hu, L. Yi, Y. Tang, Y. Chen and R. Hu, “Enhancing Nighttime Surgical Instrument Cleaning Efficiency: An ECRS-Based Approach,” Medical Science Monitor, vol. 29, pp. 1–7, 2023, doi: 10.12659/msm.940346.

T. Choojan and P. Chutima, “Lean Application for Parts Transportation Improvement in Automotive Factory’s Warehouse,” Advanced Science, Engineering and Medicine, vol. 8, no. 10, pp. 780–784, 2016, doi: 10.1166/asem.2016.1938.

L. Zhang, B. Wu, B. Zou and Z. Wang, “Research of Auto Parts Assembly Line Simulation and Optimization Based On TOC,” IOP Conf. Series: Earth and Environmental Science, vol. 252, 2019, Art. no. 032125, doi: 10.1088/1755-1315/252/3/032125.

S. M. Tang, W. Pei, and M. H. Chuang, “PV chart management innovation based on production balance ratio: a case study of Company S’s GaAs process improvement for compound semiconductors,” The International Journal of Advanced Manufacturing Technology, vol. 136, no. 5–6, pp. 2769–2799, 2025, doi: 10.1007/s00170-024-14963-0.

P. Jindal, S. S. S. Bharadwaja, S. Rattra, Chaitanya, V. Gupta, P. Breedon, Y. Reinwald and M. Juneja, “Designing cranial fixture shapes and topologies for optimizing PEEK implant thickness in cranioplasty,” Journal of Materials: Design and Applications, vol. 237, no. 8, pp. 1752–1770, 2023, doi: 10.1177/14644207231155761.

H. Radhwan, M. S. M. Effendi, M. F. Rosli, Z. Shayfull and K. N. Nadia, “Design and Analysis of Jigs and Fixtures for Manufacturing Process,” IOP Conf. Series: Materials Science and Engineering, vol. 551, no. 1, 2019, Art. no. 012028, doi: 10.1088/1757-899x/551/1/012028.

J. W. Park, J. Park, H. Kim, N. Kim and D. Y. Kim, “Assembly Part Positioning on Transformable Pin Array Fixture by Active Pin Maximization and Joining Point Alignment,” IEEE Transactions on Automation Science and Engineering, vol. 19, no. 2, pp. 1047–1057, 2022, doi: 10.1109/TASE.2021.3050403.

A. Mamat, H. J. Yap, C. H. Tan and M. B. M. Asri, “Fixture Design for Outer Skin Aircraft Door Manual Drilling Operation with Finite Element Analysis and Ergonomic Consideration,” Advances in Materials Science and Engineering, vol. 2022, 2022, Art. no. 4236629, doi: 10.1155/2022/4236629.

W. H. W. Mahmood, A. N. M. Amin and L. Hanapiah, “Application of AHP on SMED for Jig and Fixture Design Selection,” International Journal of Human and Technology Interaction (IJHATI), vol. 4, no. 1, pp. 27–37, 2020.

H. Yu, L. Zhang, and G. Li, “Research of analytic hierarchy process applying for case-based reasoning in automotive welding jig design,” in Proceedings 2013 International Conference on Mechatronic Sciences, Electric Engineering and Computer (MEC), Shenyang, China, Dec. 20–22, 2013, pp. 3222–3226, doi: 10.1109/MEC.2013.6885574.

A. Z. M. Noor, F. A. Jafar, M. H. A. Bakar and S. Sulaiman, “Design of Reverse and Missing Jaw Detector Jig using Analytic Hierarchy Process (AHP),” International Journal of Recent Technology and Engineering (IJRTE), vol. 8, no. 2, pp. 2229–2237, 2019, doi: 10.35940/ijrte.b2436.078219.

C. Naksri, S. Chuchom and S. Chaiprapat, “Design of Fixture for Welding,” IOP Conf. Series: Materials Science and Engineering, vol. 1163, no. 1, 2021, Art. no. 012007, doi: 10.1088/1757-899x/1163/1/012007.

T. L. Saaty, “How to make a decision: The analytic hierarchy process,” European Journal of Operational Research, vol. 48, no. 1, pp. 9–26, 1990, doi: 10.1016/0377-2217(90)90057-i.