APPARATUS AND METHOD FOR REPAIR AND RENOVATION OF CRANKSHAFT JOURNAL SURFACES IN-SITU BY MEANS OF LASER BUILD-UP

摘要

The field of invention refers to shipbuilding and ship repair, in particular to apparatus and method for repair and renovation of the crankshaft journal (bearing) surfaces by means of laser build-up. Fig.4 is an isometric view of offered apparatus for in-situ laser build-up positioned on a crankshaft.The offered apparatus comprises:- two guide-ways (2) for positioning said apparatus on crankshafts (1) fillets;- two frame parts (4) where each frame part (4) is fixed to the respective guide-way (2);- at least two upper rods (5) by means of which both frame parts (4) are in fixed connection to each other, wherein the upper rods (5) are positioned in the upper part of the frame part (4);- at least two lower rods (6) by means of which both frame parts (4) are in fixed connection to each other, wherein the lower rods (6) are positioned in the lower part of the frame part (4);- two carriages (7A; 7B) which are installed on the upper rods (5) and the lower rods (6) so that the carriages (7A; 7B) can be slidebly moved along said rods (5, 6);- a laser nozzle (10) installed on the carriages (7A; 7B);- two control motors (8A; 8B), wherein a first control motor (8A) is installed in the first carriage (7A) and operatively connected to the laser nozzle (10) to control its pivoting angle (X), and a second control motor (8B) is installed in the second carriage (7B) and operatively connected to the one of the two lower rods (6) by means of a gearing transmission to control a longitudinal position of the laser nozzle (10).