Flanging arrangement for wall hole of thin metal pipe

Abstract

The hole outer flanging set for thin wall metal pipe wall includes one cutter and one driving device. The cutter has several cutter bits, which are distributed homogeneously and axially around cutter handle and include an elastic part fixed to the cutter handle and a flanging edge set in the end of the elastic part each; and a cutter body with pull rod capable of expanding the flanging edges along elastic parts inside an axial hole. The flanging edges under the action of the elastic parts are in free state for the cutter head to be inserted into the hole easily. After the cutter head is inserted into the hole, the pull rod is pulled to expand the flanging edges and to form the outer flange before the cutter is rotated and withdrawn. The present invention needs no inner mold, has simple technological process and high work efficiency, and suitable for automatic production.

Description

technical field [0001] The invention relates to a mechanical processing equipment, in particular to a device capable of flanging the wall hole of a thin-walled metal pipe. Background technique [0002] At present, the water chamber of the copper-aluminum composite radiator adopts thin-walled copper tubes. During the processing, it is necessary to process many holes for connecting gas or liquid on the copper tubes, and weld connecting tubes between the holes opposite to the two main pipes. for heat exchange. In order to improve the welding strength, it is required to turn the edge of the hole inward or outward. Such as Figure 8 As shown, the water flow channel of the main pipe with the inner flanging is not smooth due to the inner flanging, which increases the resistance of the water circulation and increases the load of the heat pump; Figure 7 As shown in Fig. 1, the water flow channel of the main pipe with flanging is relatively smooth, but the flanging process is relat...

AI Technical Summary

Problems solved by technology

like Figure 8 As shown, the water flow channel of the main pipe with the inner flanging is not smooth due to the inner flanging, which increases the resistance of the water circulation and increases the load of the heat pump; Figure 7 As shown in the figure, the water flow channel of the main pipe of the outer flanging is relatively smooth, but the flanging process is more complicated, and the traditional process of inner mold and outer mold is often used, and the inner mold must be inserted into the thin-walled pipe, so the production efficiency is very high. Difficult to improve

Images