One-step inner molding die tooling assembly for composite copper pipe

Abstract

The invention discloses a one-step inner molding die tooling assembly for a composite copper pipe. The one-step inner molding die tooling assembly comprises a mandril (1), small dies (2), middle dies (3), large dies (4), a front die clamp (5) and a rear die clamp (6), wherein the mandril (1) is manufactured by cold-drawn round steel; the outer diameters of three groups of dies, namely the small dies (2), the middle dies (3) and the large dies (4) are sequentially increased by 2-2.5mm; the small dies (2), the middle dies (3) and the large dies (4) are sequentially assembled on the mandril (1) from small to large according to the outer diameter; a thread is also designed and processed in an assembly die part of the mandril (1); and the front die clamp (5) and the rear die clamp (6) are used for respectively fixing the small dies (2), the middle dies (3) and the large dies (4) on the mandril (1) in a thread screwing manner, so as to form the one-step inner molding die tooling assembly for the composite copper pipe. The one-step inner molding die tooling assembly for the composite copper pipe is scientific in design, low in manufacturing cost, and simple and feasible in operation, the production efficiency is greatly improved, and the labor intensity of a worker is obviously lowered.

Description

Technical field [0001] The invention relates to the technical field of processing and molding of composite copper water pipes, in particular to a mold tool assembly for one-time inner molding of composite copper water pipes. Background technique [0002] As one of the newly developed bimetal composite pipes, the production and molding of composite copper water pipes basically use cold extrusion inner molding processing. The cold-extrusion internal forming not only makes the inner copper pipe and outer carbon steel pipe tightly compounded into one body, but also has precise dimensions and small tolerances. It can also improve the mechanical properties of the formed composite copper water pipe. [0003] However, the cold extrusion internal molding process has a disadvantage, that is, the production efficiency is low. The internal molding processing rate of each cold extrusion can only reach about 1%. If the processing rate is too large, it is easy to cause the inner wall copper tube ...

AI Technical Summary

Problems solved by technology

[0003] However, the cold extrusion inner forming process has a disadvantage, that is, the production efficiency is low, and the processing rate of each cold extrusion inner forming process can only reach about 1%. serious consequences such as stratification

Existing cold extrusion internal molding production and processing of composite copper water pipes, after each cold extrusion processing, the composite pipe must be removed, replaced with a larger size mold, and then cold extrusion processing is performed again, and this is repeated three times to complete. The entire composite process of cold extrusion and internal molding of a composite copper water pipe is low in production efficiency and high in labor intensity

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