Processing method of large-diameter thin-walled air-fed aluminum elbow

Abstract

The invention belongs to the technical field of metal pipe bending, and relates to a machining method of a high-precision and high-strength large-caliber thin-walled air supply aluminum bent pipe. The problem that a large-caliber thin-walled air supply aluminum bent pipe high in size precision, strength and yield strength cannot be produced out through existing equipment and methods is mainly solved. The machining method is mainly characterized by comprising the steps that 1, an untreated f-state blank pipe is selected; 2, the oval and surface of the blank pipe are shaped through a sphere passing diameter shaping process; 3, the shaped blank pipe is bent through an improved hydraulic pipe bending machine; 4, the thin-walled bent pipe formed through machining is subjected to pressure maintaining and then is discharged from the machine; 5, the bent pipe discharged from the machine is aged to improve strength; and 6, factory detection is carried out through detection equipment, and it is guaranteed that the angle, ovality, torsion resistance, hardness, streamline and the like meet design requirements. The machining method is mainly used for machining the high-precision and high-strength large-caliber thin-walled air supply aluminum bent pipe.

Description

technical field [0001] The invention belongs to the technical field of metal pipe bending, and in particular relates to a processing method for a high-precision, high-strength, large-diameter thin-wall air-fed aluminum bend used in a pneumatic conveying system. Background technique [0002] At present, the forming method of aluminum bent pipe in my country: generally, the base material must be annealed first to eliminate stress, and the aluminum pipe is bent in a soft state. The bent pipe processed by this process has a problem of extremely low yield strength due to its soft material. For air pipelines, large-diameter thin-walled (Φ150mm, wall thickness 2mm) elbows are generally used, which will cause deformation of the port or pipe wall due to external force bumps during transportation, loading and unloading, and on-site assembly. Potholes. If the port part or the ellipse of the bumped part changes, it will directly affect the smoothness of the conveyed goods in the tube;...

AI Technical Summary

Problems solved by technology

For the large-diameter thin-walled aluminum elbow pipe of Φ150㎜, wall thickness 2㎜, R1200mm, and bending angle of 90 degrees used as an air delivery system, it is difficult to ensure high precision in size and high strength against yielding if traditional processing methods are used.