| 摘要 |
A device for plasma welding with transferred arc, for surfacing with hard powders on workpieces (9), including a welding torch (1), a powder dispenser (2) with dosing member (4), and means (3) for conveying the powder from the dispenser (2) to the weld region (8), wherein the powder dispenser (2) is directly mounted on the welding torch (1), the means (3) for conveying the powder from the dispenser (2) to the weld region (8) comprise a descent tube (3) directed downwards, wherein the powder proceeds by gravity, and the dosing member (4) is inserted at an initial portion of said descent tube (3), preferably consisting of an elastic material, such as rubber; the control of the delivered rate of powder is carried out by means of a shutter (4) which produces a controlled throttle of the descent tube (3) for the powder. |
