METHOD OF PRODUCING AXIAL BLADE MACHINES (VERSIONS) Russian patent published in 2009 - IPC B23P15/02 

FIELD: machine building.

SUBSTANCE: invention relates to power engineering. In compliance with the first version the proposed method of producing axial blade machines, primarily, flue-gas pumps and industrial fans comprises forming the initial workpiece from T-rolling that features smooth radius of transition of the wall-to-shelf, which corresponds to the requirements of durability of stem-to-blade transition radius. Aforesaid T-section is cut into parts with their length corresponding to that of the blade airfoil portion which is cut from the wall of every rolling. The blade airfoil portion is mechanically produced from the shelf. At least one cut is made on the stem and at least one incision for blade air foil portion forming. The workpiece thus produced, is heated and formed. In compliance with the second version, the H-section formed rolling is used to be cut into parts with their length corresponding to that of the blade airfoil portion. Two blades airfoil portions are cut the wall of every part of rolling. The stems of two blades are mechanically produced from the shelves of every part of rolling. The workpiece is cut symmetrically in length. If required, additional parts are welded to the blade airfoil portion to ensure required length. At least one cut and one incision are made on the stem for forming the blade airfoil portion. The workpiece thus produced is heated and formed.

EFFECT: metal material ratio increased to 30 to 50%, reduced labor input and longer life.

10 cl, 5 ex, 12 dwg