Processing technology of internal thread and external finned tube

Abstract

The invention discloses a machining process of internal threads and outer fin pipes, and relates to the technical field of water heater heat dissipation. The problem of poor heat conductivity of connection parts between the fin plates and a copper pipe; the technical scheme of the machining process is characterized by comprising the following steps that a, a copper material is smelted; b, extruding and forming are performed; c, the outer fin plates are machined; c1, primarily machining is performed; c2, secondary machining is performed; c3, trinary machining is performed; c4, fine machining isperformed; d, internal threads machining is performed; and e, tempering is conducted. The fin plates machined by pressing a roller from outside when the roller passes through the outside of a pipe are integrated with the pipe, the heat conduction performance of the connection parts is good, and therefore the heat conduction performance of the whole pipe is improved.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of water heaters, and more specifically, it relates to a processing technology for inner-threaded and outer-finned tubes. Background technique [0002] In the fields of refrigeration, air conditioning, process engineering, petrochemical industry, and energy and power engineering, it is necessary to involve the boiling or condensation of liquid on the outer surface of the tube bundle, especially the evaporator and condenser used in refrigeration or air conditioning systems. When the refrigerant boils or condenses outside the tube, the thermal resistance of the phase change heat transfer is equal to or even greater than the thermal resistance of the forced convection heat transfer inside the tube. The heat transfer performance of the condenser can play a significant role. [0003] In the prior art, in order to improve the heat transfer performance of the tubes, internal threads are provide...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to improve the heat transfer performance of the tubes, internal threads are provided inside the heat transfer tubes, and fins are provided outside the heat transfer tubes. By setting internal threads and fins, the heat transfer area of ​​the tubes is increased, thereby improving The heat dissipation performance of the tube is improved; the traditional processing method is mostly to weld the processed fin plate to the outside of the tube when processing the fin plate, and the thermal conductivity of the tube at the connection is reduced, thereby reducing the overall thermal conductivity of the tube.

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