FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly, to impellers of vacuum fans, smoke suckers and high-efficiency blowers. Central disc, cover discs, blades and protective straps are cur to required sizes by air-plasma welding with connection surfaces. Stiffness rings are turned to mounting size to make the expansion ring. Blades of one pair are fitted on said disc opposite each other. Weld is made in the presence of temperature in welding zone, Quality control of welds at cover discs with stiffness rings is performed by magnetic powder flaw detection. Welds in welded rotor are checked by ultrasound flaw detection. Strains are removed after welding by vibration-stabilisation processing. Wearproof bimetal sheet is used for production of protective straps.
EFFECT: lower labour, metal and power input.
7 cl
| Title | Year | Author | Number |
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SU1771161A1 |
