| 摘要 |
PCT No. PCT/SE96/01045 Sec. 371 Date May 5, 1997 Sec. 102(e) Date May 5, 1997 PCT Filed Aug. 23, 1996 PCT Pub. No. WO97/09120 PCT Pub. Date Mar. 13, 1997Conical separation discs of thin sheet metal intended for centrifugal separators have, as a rule, spacing members in the form of thin strips welded onto one of their sides. For avoiding local overheating of a separation disc, when a strip is to be welded onto the separation disc by roll welding, the strip is formed with at least one ridge extending in the longitudinal direction of the strip, the width of the ridge being substantially smaller than that of the strip. In this way, the contact area between the strip and the separation disc will become very small in the welding area, and only a limited amount of energy is needed for the welding. |
