Machining technology of non-fin heat exchanger

Abstract

The invention discloses a machining technology of a non-fin heat exchanger. The non-fin heat exchanger comprises tube bodies and flat tubes. The machining technology of the non-fin heat exchanger comprises the following steps that (1) inserting holes are formed in the periphery of each tube body; (2) the two ends of each flat tube are inserted into the corresponding inserting holes formed in the tube bodies located at the two ends respectively; (3) a welding locating tool is arranged between every two flat tubes; each welding locating tool comprises a hollow tube, a clamping groove is formed in the tube wall of each hollow tube, and the flat tubes are clamped into the clamping grooves; (4) the portions, located on the connecting portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with soldering paste; (5) the two sides of each flat tube are respectively provided with a reinforcing welding rod attached to the circumferential walls of the corresponding tube bodies; (6) the portions, located at the connection portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with brazing flux and the mass concentration of the brazing flux is 30%-40%; (7) the tube bodies and the flat tubes are placed in a brazier together with the welding locating tools for brazing. By the adoption of the machining technology, good-quality welding of the non-fin heat exchanger is achieved.

Description

technical field

[0001] The invention relates to a processing technology of a finless heat exchanger. Background technique

[0002] In order to exchange heat, heat exchangers are used in various industries. A kind of heat exchanger mainly includes a tube body and a flat tube arranged between the two tube bodies, fins are arranged between the flat tubes, and an inlet tube and an outlet tube are arranged on one of the tube bodies. The heat exchange of the above structure Because of the fins, the flat tubes are evenly arranged, and stress is not easily generated during the brazing process. The strength of the weld is high and will not affect the appearance of the weld, and the fins can support the flat tubes. The role of the heat exchanger makes the strength of the heat exchanger high. In addition, the fins can greatly increase the heat exchange area, so the heat exchange efficiency is high. However, after the fins are provided, the volume of the heat exchanger is large, so it...

Images