| 摘要 |
PURPOSE:To decrease the collapsion and abrasion loss of the electrode end and prolong its endurance life by constituting the electrode for spot welding machines by the composite material of copper or alloy composed primarily of copper and carbon fibers. CONSTITUTION:The electrode used for spot welding machines is constituted by the composite material of Cu or alloy such as Cu-Cr, Cu-Be, Cu-Cr-Zr, Cu-Ag, and carbon fibers. In this case, the volume contents of the carbon fibers with respect to the Cu alloy are made 1-30% and the diameters of the carbon fibers about 3-15 micron. The carbon fibers are let to exist only in the end part 2b of the electrode, or in the lengthwise direction of the electrode. Or the short fibers of the carbon fibers are let to exist in the end parts 2c, 2d of the electrode in the lengthwise direction of the electrode or random in the transverse direction of the electrode. The collapsion and abrasion loss of the electrode end upon use occur less and electrode has a longer life. |
