Machining method for sealing flange ring piece

Abstract

The invention relates to the technical field of flange machining, and discloses a machining method for a sealing flange ring piece. The machining method comprises the steps: 1, material selecting; 2, blank heating; 3, blank forging and pressing, wherein specifically, a heated blank is moved to a forging and pressing platform of a lower forging and pressing table, the forging and pressing platform descends through a lifting guide rod, a lower top base ascends through a lifting oil cylinder, the lower top base is clamped in a convex clamping groove of the forging and pressing platform under the combined action, an upper forging and pressing table is driven to descend to conduct upsetting and pressing on the blank, and a lower half part of the upset blank forms a conical hole with the same shape as the lower top base; 4, blank broaching; 5, blank excessive broaching; and 6, cooling treatment. According to the machining method for the sealing flange ring piece, upsetting, extruding and punching are completed at a time, secondary heating is not needed, meanwhile, the continuity of the machining process is achieved, the product machining precision is guaranteed, a good microstructure is still reserved in metal, and the mechanical performance of a workpiece is greatly improved.

Description

technical field [0001] The invention relates to the technical field of flange processing, in particular to a processing method for sealing flange rings. Background technique [0002] Flange is otherwise known as flange flange or flange. Flanges are parts that are connected to each other between shafts and are used for connection between pipe ends; they are also useful for flanges on equipment inlets and outlets, And can be used as connection between two equipments, example reducer flanges. Flange connection or flange joint refers back to the detachable connection of flange, Gasket and bolt as a team of combined sealing structure. Pipe flange refers back to the flange used for piping in the pipeline installation, And used on the equipment refers to the inlet and outlet flange of the equipment. There are holes in the flange, and the bolts tightly connect the two flanges. [0003] The existing processing method of the flange ring is usually: blanking→heating→upsetting→heatin...

AI Technical Summary

Problems solved by technology

[0004] First, after the billet has been subjected to repeated pier rough forging, the original internal structure is uniform, and the metal has high mechanical properties. However, the excess metal is directly extruded by the existing process, which causes the internal metal to be torn and affects its mechanical properties. ;

[0005] The second is that the blank needs to have enough redundancy when blanking, and the redundant punching block needs to be forged repeatedly, which not only affects the production efficiency, but also wastes energy;

[0007] The existing processing technology must conduct quenching and tempering treatment on the billet for secondary heating, resulting in the production of flange rings prone to shrinkage, cracks and other quality problems