Design, Fabrication and Performance Evaluation of a Low-Cost Rod Twisting Machine.

This study presents the design, fabrication, and performance evaluation of a low-cost rod twisting machine using locally available materials. The machine was developed to improve productivity, consistency, and efficiency compared to manual twisting methods. Mild steel rods of diameters 6 mm to 16 mm (500 mm length) were tested under identical operating conditions. The required torque was determined using torsion theory, and a 3 kW electric motor was selected based on power requirements. Experimental results showed that twisting time increased from 7.7 s to 26.0 s with increasing rod diameter, the number of twists decreased from 9.67 to 4.67. Efficiency analysis showed that the machine operates optimally at higher loads, with a maximum theoretical efficiency of 92.53%. However practical efficiency is expected to be lower due to transmission losses. The developed machine provides a cost-effective and reliable solution suitable for small-scale metal fabrication industries.

Rod Twisting Machine, Torsional Deformation, Error Bar Analysis, Efficiency Evaluation, Torque Analysis, Power Transmission

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