Forming device and method for precise subregional temperature control to realize tube end shrinking and thickening

Abstract

The invention discloses a forming device and a method for accurately controlling temperature in different regions to realize the thickening of pipe end shrinkage, and relates to the technical field of pipe plastic processing. Die and thickening die; the pusher is used to push and extrude the tube blank under the drive of the power source; the shrinking die and / or the thickening die are equipped with a heating structure, and the shrinking die is used for the shrinkage forming of the tube blank to increase the thickness. The thick die is used for thickening and forming of the tube blank; the cooler is used to cool the tube blank temperature outside the necking die and the thickening die. The forming device and method of the present invention can realize the free adjustment of the temperature of the mold necking area and the thickening area, which not only improves the material utilization rate, product quality and connection strength, but also reduces the manufacturing cost of the mold and shortens the heating time of the mold. It is easier to clean after the mold is divided into blocks, and it is more convenient to take out the parts after forming.

Description

technical field [0001] The invention relates to the technical field of plastic processing of pipes, in particular to a forming device and method for accurately sub-regional temperature control to realize thickening of pipe end shrinkage. Background technique [0002] The necking process is a forming method to reduce the diameter of the mouth of the tube blank. At present, tube shrink forming ignores the work hardening and thickness change of the tube after necking. Therefore, after the tube is formed, there is no significant radial thickening at the constriction, and other components need to be connected by welding or riveting in the later stage. In addition, the traditional aircraft tie-rod parts are too thin due to the thin wall thickness of the pipe shrinking end, such as direct thread tapping may cause the pipe to rupture and fail. However, the method of riveting the threaded sleeve after the pipe shrinking is used to manufacture, not only the connection strength is uns...

AI Technical Summary

Problems solved by technology

This method has high mold cost, heavy use, long time-consuming heating of the mold, and since the necking area and the thickening area are integrated, it is impossible to realize the separate control of the temperature in different areas, resulting in too much accumulation of materials in the necking area, resulting in Unnecessary thickening of the wall thickness in the necking area wastes material, increases the weight of the part, and hinders the flow of material to the thickening area, so that the wall thickness of the tube blank thickening area does not increase enough

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