Metal elbow cold extrusion molding device

Abstract

The invention relates to a metal elbow cold extrusion molding device for processing metal pipe fittings. The invention solves the defects of serious loss of filters, long process time and high bending cost of pipe fittings in the traditional pipe bending technology which needs filling. The metal elbow cold extrusion molding device comprises an extrusion mold core which can be inserted into a mold cavity and a core pushing stick for pushing the pipe fittings to be processed. The extrusion mold core comprises a basic shaft and a working end. The basic shaft is adapted to the inner diameter of the mold cavity, at least one gap equal with the wall thickness of the pipe fitting is arranged between the working end and the inner wall of the mold cavity, the projection of the working end along with the axial direction of the basic shaft is of a round shape, and the round shape is consistent with the inner diameter of the pipe fitting to be processed. The axial projection of the working end is of the round shape, then the pipe fitting can be repaired when the working end exits, the end part of the pipe fitting is of the round shape, the pipe fitting is formed by extruded and bended one-step molding and does not need cooling, the bending time is short, the operation is simple, the efficiency is high, the shape of the end part of the final pipe fitting is more in line with requirements, and the precision is higher.

Description

technical field [0001] The invention relates to a metal extrusion device, in particular to a metal elbow cold extrusion forming device used for processing metal pipe fittings. Background technique [0002] The traditional pipe bending process uses a pipe bender, and the pipe is bent through the guidance of the pipe bender. However, in this process, when the pipe is bent, the bent part of the pipe is easily deformed and may become flat. The time is more troublesome, and the docking part is also more likely to cause leakage. Therefore, in the existing pipe fitting bending method, a filling process is used to fill the pipe fitting, such as filling lead, wax or steel balls, etc. The lead filling is to add lead equivalent to the inner diameter of the pipe fitting inside the pipe fitting. There are 6 processes of blanking, lead melting, lead filling, forming, lead removal, and cutting. The surface of the pipe fittings needs to be pickled to remove the residual lead on the inner w...

AI Technical Summary

Problems solved by technology

[0004] The invention solves the shortcomings of the traditional pipe bending technology, such as the need for filling, the serious loss of fillers, the long process time, and the high cost of pipe ben

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