| 摘要 |
FIELD: machine building.SUBSTANCE: method involves bending of sheet edges, forming, welding, expansion. Improvement of expansion operation efficiency by providing the conditions when minimisation of welded billet profile deviations from a circle shape occurs with the consideration of the impact of heat deformations associated with the welding operations, is achieved due to the fact that billet profile deviations from a circle are checked in at least three sections (at the ends and in the middle) after welding operation is finished, and when forming the next billet, the travel of a step moulding press punch is corrected accounting for the location, value and sign of the specified deviations. The press performance is corrected periodically after regular measurement of billet geometrical shape.EFFECT: higher efficiency of the following expansion of the billets. |
