Small diameter pvdf pipe bend forming process

Abstract

The invention discloses a small diameter PVDF pipe elbow forming process. Including blanking, heating, continuous heating, bending and cooling steps. The invention adopts a constant temperature method to heat the PVDF pipe material, so that the inside and outside of the pipe are fully and evenly heated. By controlling the temperature of the pipe to be heated and softened, the pipe is bent by one-time extrusion molding with filler bending, which effectively controls the cross-sectional shape of the pipe when it is bent. Distortion, wrinkling, and large errors in cross-section thickness; and through effective control of the ambient temperature, the heating temperature of the pipe, and the preheating temperature of the mold and filler, the size of the pipe after bending and forming can be kept consistent; in addition, the bending made After molding, the bent pipe is kept in the mold for natural cooling. Through the control of temperature and time, the internal stress is eliminated, and the springback problem of the pipe can be effectively solved, so that high-quality PVDF bent pipe can be manufactured, which is suitable for various occasions. application.

Description

technical field [0001] The invention relates to a PVDF pipe elbow forming process, in particular to a small-diameter PVDF pipe elbow forming process. Background technique [0002] In electric power and large power grid projects, the converter valve as a key component is under high power and high load working conditions, and will emit a large amount of heat during work, which needs to be effectively cooled. The national standard stipulates that the cooling method is water cooling. Therefore, in order to ensure the normal operation of the electric power and grid system, the water cooling system of the converter valve needs to be able to operate stably and effectively dissipate the heat of the converter valve. At present, a large number of PVDF pipes with good chemical corrosion resistance, high temperature resistance and oxidation resistance are used as medium transmission pipes in the water cooling system of the diverter valve. However, the current bending forming process o...

AI Technical Summary

Problems solved by technology

However, the current bending forming process of small-diameter PVDF pipes is very backward. The bent PVDF pipes have defects such as cross-sectional shape distortion, wrinkling, and large cross-sectional thickness errors. Leakage, abnormal deformation, and rupture may occur during use. Hidden dangers, and the scrap rate in production is high, wasting resources