Expansion-type welded tensile joint and its realization process

Abstract

The invention discloses an expanded-connection-type welding stretching connecting pipe and two stretching forming processes thereof. The stretching forming process adopting a stainless steel plate comprises the working procedures that preparation is conducted; the plate is continuously stretched through a stretching die; the two ends of the connecting pipe are milled; forming is conducted througha spinning die; the bottom end of the connecting pipe is flanged through a flanging die; the bottom end of the connecting pipe is milled; a limiting groove is extruded through an extruding die; the expanded connection position is cleaned; expanded connection is conducted; and quality inspection is conducted. The stretching forming process adopting a stainless steel pipe comprises the working procedures that preparation is conducted; the bottom end of the pipe is milled; forming is conducted through the spinning die; the bottom end of the connecting pipe is flanged through the flanging die; thebottom end of the connecting pipe is milled; the limiting groove is extruded through the extruding die; the expanded connection position is cleaned; expanded connection is conducted; and quality inspection is conducted. The expanded-connection-type welding stretching connecting pipe and the two stretching forming processes thereof have the advantages that the processing processes of the connecting pipe are simplified, and the raw material cost and the machining cost are greatly reduced.

Description

technical field [0001] The invention is a connecting pipe processed by a new process, especially relates to a stainless steel joint welded with a copper tube, which is applied to a brazed plate heat exchanger. The main feature is that the processing technology of the connecting pipe is simplified, and the cost of raw materials and machining is greatly reduced . Background technique [0002] Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-vapor heat exchange. It has a series of advantages such as high heat exchange efficiency, small heat loss, compact and light structure, small footprint, and long service life. Widely used in metallurgy, mining, petroleum, chemical industry, electric power, medicine, food, chemical fiber, papermaking, textile, shipbuilding, heating and other departments. Moreover, it can be used in various situations such as heating, cooling, evaporation, condensation, sterilization, and waste heat recovery. There are two main types ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that a large amount of material will be wasted when processing large-diameter welded pipes by using pipes or solid round steel on a numerically controlled lathe for the connecting pipes used in traditional brazed plate heat exchangers. Its processing cost is also particularly high, and the processing technology is relatively cumbersome. Two kinds of relatively simplified and greatly reduced processing costs are proposed.

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