Electromagnetic heating type extrusion molding device for dimpled heat transfer pipe

Abstract

The invention relates to an electromagnetic heating type extrusion molding device for a dimpled heat transfer pipe. The device comprises a hydraulic system, a supporting system, a reset system, a pressing head system and a heating system. The device is characterized in that the supporting system is in bolt connection with the hydraulic system; the pressing head system is connected to the lower side of the hydraulic system through a pin shaft; the reset system is installed between the pressing head system and the hydraulic system; the heating system is installed on the right side of the pressing head system. Before the device works, heating treatment is conducted on a light pipe through the heating system, so that the light pipe is softened; when extruding is conduced, driving force is provided for the pressing head system through a hydraulic cylinder, and the pressing head system drives multiple punch heads to extrude the light pipe simultaneously; after extruding is finished, the pressing head system restores to an original state through a tension spring of the reset system, and then the dimpled heat transfer pipe is formed. Compared with the prior art, the softened light pipe is extruded by adopting multiple groups of pressing heads, the extruding force and the residual stress are decreased, the plastic molding limit is increased, therefore, the machining and manufacturing efficiency of the dimpled pipe is improved, and the production cost and the machining difficulty are reduced.

Description

technical field [0001] The invention relates to the field of processing and forming heat transfer tubes, in particular to an electromagnetically heated extrusion molding device for heat transfer tubes. Background technique [0002] Heat transfer is a very common natural phenomenon and a common process in industries such as power, nuclear energy, electronics, transportation, refrigeration, chemical, petroleum, aerospace, etc. The heat exchanger occupies a key position in the above-mentioned industries. The heat exchanger is not only an indispensable part to ensure the normal operation of the entire engineering equipment, but also occupies an important share in the entire project in terms of metal consumption, power consumption and capital investment. . Taking a power plant as an example, if the boiler is also used as heat exchange equipment, the capital investment of the heat exchanger accounts for about 70% of the total investment of the power plant; in petrochemical indust...

AI Technical Summary

Problems solved by technology

[0005] However, although there are many kinds of heat transfer tube processing and manufacturing devices at present, there are few extrusion molding devices suitable for small cell heat transfer tubes, and most of them are cold extrusion molding.

Due to the disadvantages of the cold extrusion of the heat transfer tube of the cell, the required extrusion force is large, the plastic forming limit is small, the plastic flow is not uniform, and the residual stress after extrusion is large, so a new type of extrusion is urgently needed. The forming device is used to solve the above problems

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