|2019 №04 (05)||
DOI of Article
|2019 №04 (07)|
Avtomaticheskaya Svarka (Automatic Welding), #4, 2019, pp. 35-41
Repair of screws of extruders and automatic molding machines by plasma-arc surfacing
Plasma-Master Ltd, 3 Krzhyzhanovskogo Str., 03142, Kyiv. E-mail:email@example.com.
The peculiarities of formation of bead on narrow flight screw apex in plasma-powder surfacing were investigated. It is shown how a shape of deposited bead depends on its section and main technological parameters of surfacing, i.e. arc current, surfacing speed and zenith displacement. The nomograms for selection of surfacing mode parameters were proposed. Equipment and consumables used for surfacing are also described. Repair of screws of extruders and automatic molding machines using plasma-arc surfacing allows repairing these parts as well as 3-5 times increasing their service life in comparison with new nitrated screws. 11 Ref., 13 Fig.
Keywords: plasma-powder surfacing, screws of extruders and automatic molding machines, narrow apex, bead formation, surfacing parameters, equipment and consumables.
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