The Friction and Wear Characteristic Comparison of PMMA and MC Nylon as Spreading Device Pad Material in Copper Coil Forming

The purpose of this study is to compare the frictions and wears characteristics of poly methyl methacrylate (PMMA) and MC Nylon. This study was carried out to investigate the material to be considered as the pad of spreading device material in the copper coil forming machine. To analyze the friction and wear characteristics of those materials the experiments were done as follows. Firstly, the friction characteristic was obtained using a pin-on-disk tester. The experiment was carried on dry and wet friction conditions under paraffin oil lubricant. Secondly, the state of lubrication was investigated using the Stribeck’s Curve. Thirdly, to investigate the wear characteristic, the weight of the pin was measured before and after the friction test. The wear rate is defined as the difference between the initial weight and the final weight. The experimental results show that the friction coefficient of PMMA material was higher than MC nylon. Furthermore, PMMA wear rate also higher than MC Nylon wear rate. The highest wear was achieved on PMMA in dry friction condition, which is 0.00290 grams. MC Nylon was recommended to be used as padding of the spreading device on the coil forming machine.