Journal of the Chinese Society of Mechanical Engineers

CSME 2024/10
Volume 45 No.5 : 509-516

Optimization Parameters in Cold Metal Transfer (CMT) Welding of SUS 316 to SPHC

Seto Agung Riyanto^a, Fransiska Karlentina Hapsari^b, Adi Nugroho^a and Perwita Kurniawan^b
^aDepartment of Mechanical and Automation Design Engineering, Polytechnic ATMI, Surakarta, 57145, Indonesia.
^bDepartment of Manufacture Design, Polytechnic ATMI, Surakarta, 57145, Indonesia.

Abstract: Cold Metal Transfer (CMT) welding produces very precise welds with the assistance of a welding robot. This technology can be used to weld joints between materials that have different mechanical properties. This research aims to improve production quality in welding by identifying optimal parameters from the machine, simultaneously reducing production costs through welding two different materials. The welding results are expected to achieve optimal strength and functionality. Emphasizing that welding of dissimilar materials is not only feasible but also an effective solution for various industrial needs, such as the production of medical equipment, food services, energy industries, and others. This study was conducted to determine the optimal parameters of CMT welding machine for joining SUS 316 and SPHC materials. The two materials will be welded by adjusting several specified parameters. During welding, temperature fluctuations have a significant impact on material properties, the precision of the welding shape, and residual stress. The cycle arcing phase, wire feed phase, and pause time interval phase can be adjusted to generate enough energy to reach a specific temperature and achieve satisfactory welding results. The cycle arcing phase has a range of 20-60 times, the wire feed phase is 10-14 m/min, and the pause time interval phase has a range of 0.01s-0.1s. Each specimen is analyzed for tensile strength in order to determine the highest value among the existing parameters. The optimal combination of parameters is achieved 40 times in the cycle arcing phase, 14 m/min in the wire feed phase, and 0.01s in the pause time interval phase which can be seen from the highest of tensile strength result, specifically 362.7 N/mm². The Taguchi method is used to obtain the optimal parameters. The S/N Ratio calculation shows that higher values for the cycle arcing phase, wire feed phase, and pause time interval phase can result in higher tensile strength values. These parameters can be used to produce precise welds on SUS 316 and SPHC materials, resulting in the highest tensile strength.

Keywords: Cold Metal Transfer (CMT) welding, cycle arcing phase, wire feed phase, pause time interval phase, Taguchi, dissimilar material.

*Corresponding author; e-mail: seto.agung@atmi.ac.id

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