| 摘要 |
<p>PURPOSE:To secure productivity stably and efficiently and manufacture vibration- damping steel plate of superior resistance welding properties by carrying out contact bonding while applying pulse to conductive particles mixed with two steel plates, upper and lower, and resin in an intermediate layer in the after-process of pressure rollers. CONSTITUTION:Conductive particles for securing sufficiently electric resistance welding properties are mixed into resin of an intermediate layer. The setting positions of current applying rollers are basically at the time when bonding of vibration-damping steel plates is completed, that is, the after-process of pressure rollers, in order to secure sufficiently the bonding properties of vibration-damping steel plates. The two steel plates, upper and lower, can be bonded with the conductive particles without melting or spraying the conductive particles by applying pulse-like current to vary the current value discontinuously. Also, the resin remaining in the vicinity of the bonding section of the conductive particles and two steel plates, upper and lower, is heat decomposed by applying said pulse-like current, and good welding properties can be provided by electrically recontacting by means of pressurizing force at the time of welding, even if the bonding section is removed off after contact bonding by means of a plurality of pressure rollers.</p> |
