MODELLING LATERAL DEFORMATIONS IN WELDING WITHOUT TACKING OF LARGE PLATES WITH ACCOUNT OF FRICTIONAL FORCES CREATED BY STATIONARY CLAMPS

摘要

One of actual problems of modern shipbuilding is fusion welding without tackings joints of greater panels. The special stand is developed for keeping of a gap in necessary limits for in special cases welding by Ingenieurtechnik und Maschinenbau GmbH, Germany, with the motionless clips providing at certain pressure of force of friction, capable to keep welded edges from moving above possible. To question of numerical research of deformation of welded steel sheets of thickness up 3 to 19 mm at length of a joint up to 16 m taking into account forces of friction from clips devotes the present report. Influence of thickness of welded panels, modes and ways of welding on necessary sizes of forces of pressure in a clip is shown. In particular, it is shown that application of laser welding of joints at high speeds and low heat input the demanded size of forces of pressure can be essentially lowered in comparison with arc welding. It is shown that in welding panels 19 mm thick and above it is possible to use the stand with the clips, taking into account single-pass welding by two arches of panels of the maximal thickness of 12 mm, for welding without tacking a root pass.