Apparatus for applying wear-resistant material to the bearing points of the crank pins of old serviceable crankshafts

摘要

The spray application of metals can be carried out at a substantially higher speed than build-up welding. Whereas in build-up welding the crankshaft (6) runs at a speed of about 8 rev/min., the speed during spraying can be increased to up to 200 rev/min. However, even at substantially lower speeds than this roughly maximum possible speed, it is necessary to balance the masses of the spraying apparatus (7) together with its associated guide device in order to compensate for the unbalance caused by the spray nozzle and the guide device, in such a way that the apparatus works as far as possible free of vibration. This is achieved in that the speed of the crankshaft (6) is transmitted synchronously to a second shaft, this shaft is provided with a connecting rod having the throw of the crankshaft, and a guide acts on the small-end boss of this connecting rod, which guide ensures that the spray nozzle maintains its orientation with regard to the surface of the connecting-rod bearing as well as its distance from the surface of the connecting-rod bearing during the rotation of the connecting-rod bearing, unbalance compensation being provided on the second shaft. IMAGE