A method of controlling the power of a welding unit in ultrasonic welding operations

摘要

PCT No. PCT/SE94/00586 Sec. 371 Date Dec. 13, 1995 Sec. 102(e) Date Dec. 13, 1995 PCT Filed Jun. 14, 1994 PCT Pub. No. WO95/00316 PCT Pub. Date Jan. 5, 1995A method and device for controlling the power intake of a welding unit (1) with an ultrasonic horn (2) and an anvil holder (3) equipped with anvils (4). The mean distance of the ultrasonic horn (2) from the anvil (4) is controlled so that the power intake of the welding unit (1) will coincide with a predetermined control value.