| 摘要 |
<p>An apparatus is provided for hard facing by powder flame spraying of inner surfaces of bores of relatively large workpieces difficult to mount rotatably, such as Diesel engine blocks, and the like. The apparatus comprises a stand, a carriage support pivotally and mounted to the stand via a holding mechanism coupled to the stand and adapted to be adjustably inclined and to move vertically between a pair of supporting columns of the stand. A carriage is mounted on the carriage support and has a burner assembly mounted to and extending transversely from the carriage, the burner assembly comprising a burner mounting having a longitudinal member extending therefrom through which powder flame spray material is fed, the member terminating into a nozzle disposed transverse to the longitudinal axis of the longitudinal member. The carriage is slidably mounted on the carriage support and has a mechanism associated therewith for sliding the carriage along the axis of the longitudinal member. The carriage also has a motor for rotating it about the axis of the longitudinal member via a bearing ring, the longitudinal member and the nozzle thereof rotating with the carriage, the bearing ring having guide rails cooperably associated with an eccentrically adjustable guide for indexing the burner assembly and carriage along the carriage support relative to a bore to be sprayed.</p> |
