A special-shaped tube processing technology

Abstract

The invention provides a process for machining a special pipe. The method comprises the following steps: 1) extrusion and preforming of a roller, to be specific, selecting a hard round-straight copper pipe with an appropriate dimension parameter as a special pipe blank to be machined, and extruding and preforming the special pipe blank by using the roller so as to obtain a primarily machined blank; 2) one-step drawing formation, to be specific, putting the primarily machined blank into a drawing mold and obtaining the formed pipe after one-time drawing. The drawing mold comprises an outer mold and a core print, wherein the outer mold comprises a mold sleeve and a mold core; a cavity is formed in the mold sleeve; the mold core is clamped in the mold sleeve; a cavity is formed in the mold core; the core print is arranged in the cavity of the mold core; a drawing passage for drawing the pipe is formed between the mold core and the core print. The process for machining the special pipe, provided by the invention, has the advantages of higher machining process efficiency, better product stability and better appearance effect of the formed copper pipe; meanwhile, the rate of finished products is also increased and the product machining difficulty is reduced.

Description

technical field [0001] The invention introduces a copper pipe processing method, in particular a special-shaped pipe processing technology for a wall-hung furnace, belonging to the technical field of mechanical component processing. Background technique [0002] The wall-hung boiler is also known as the gas-fired wall-hung boiler. It uses natural gas, artificial gas or liquefied petroleum gas as fuel. The fuel is output by the burner. After burning in the combustion chamber, the heat is absorbed by the heat exchanger. When the heat exchanger is reciprocated, heat is continuously output to the building to provide a heat source for the building. In the heat exchanger of the wall-hung boiler, copper tubes are usually used as the heat exchange medium. Most of the copper tubes used in traditional heat exchangers are round tubes. During the heating process, the copper tubes of this shape are farther away from the flame at the bottom. Therefore, the temperature at the bottom of th...

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the main purpose of the present invention is to solve the problems of low processing efficiency and complicated processing technology of the copper pipes used in the current wall-hung boilers, and introduce a high processing efficiency, processing Processing technology of special-shaped tube with relatively simple process

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