C5210-H(HP)와 NKT322-EH 소재의 협피치 커텍터에서 단조 가공에 의한 소재 폭 변화에 관한 연구

A study on the change of material width by forging processing in fine pitch connector of C5210-H(HP) and NKT322-EH materials

As devices such as smartphones, tablet PC, and wearable devices have been miniaturized, the connectors that gointo the devices are also designed to be very small. The connector combines the plug and the receptacle to transferelectricity. As devices are miniaturized, the contact shape is formed by partially thinning the thickness of the raw materialof the terminal in order to lower the coupling height of the plug and receptacle. The product used in this study is areceptacle terminal used for 0.4mm pitch board to board connector among fine pitch connectors. When the materialthickness is reduced by forging the receptacle terminal, the width change of the pin is checked. To reduce the thicknessof the material by forging, pre-notching is applied in the first step, forging in the second step, and notching in the thirdstep. After forming the width dimension of the pin to 0.28 mm in the pre-notching process, in the forging process, thematerial thickness 0.08 mm and 0.02 mm (25%) were forged and the thickness was changed to 0.06 mm and the widthchange amount of the pin was measured. The facility produced 10,000 pieces at 400 SPM using a Yamada Dobby(MXM-40L) press, and thirty pins were measured and the average value was shown. After forging by using C5210-H (HP)and NKT322-EH, which are frequently used in connectors, analyze the amount of change in each material. The effect ofpunching oil on forging is investigated by appling FM-200M, which is highly viscous, and FL-212, fast drying oil. Thisstudy aims to minimize mold modification by predicting the amount of material change after forging.

As devices such as smartphones, tablet PC, and wearable devices have been miniaturized, the connectors that gointo the devices are also designed to be very small. The connector combines the plug and the receptacle to transferelectricity. As devices are miniaturized, the contact shape is formed by partially thinning the thickness of the raw materialof the terminal in order to lower the coupling height of the plug and receptacle. The product used in this study is areceptacle terminal used for 0.4mm pitch board to board connector among fine pitch connectors. When the materialthickness is reduced by forging the receptacle terminal, the width change of the pin is checked. To reduce the thicknessof the material by forging, pre-notching is applied in the first step, forging in the second step, and notching in the thirdstep. After forming the width dimension of the pin to 0.28 mm in the pre-notching process, in the forging process, thematerial thickness 0.08 mm and 0.02 mm (25%) were forged and the thickness was changed to 0.06 mm and the widthchange amount of the pin was measured. The facility produced 10,000 pieces at 400 SPM using a Yamada Dobby(MXM-40L) press, and thirty pins were measured and the average value was shown. After forging by using C5210-H (HP)and NKT322-EH, which are frequently used in connectors, analyze the amount of change in each material. The effect ofpunching oil on forging is investigated by appling FM-200M, which is highly viscous, and FL-212, fast drying oil. Thisstudy aims to minimize mold modification by predicting the amount of material change after forging.