H-shaped copper pipe drawing die assembly

Abstract

The invention discloses an H-shaped copper pipe drawing die assembly in the technical field of pipe drawing, which comprises two sets of drawing die assemblies, one set of drawing die assembly is formed by assembling a first pipe drawing die and a large lining core in a matched manner, the other set of drawing die assembly is formed by assembling a second pipe drawing die and a small lining core in a matched manner and is a firm rod-shaped drawing pipe with a fixed position, and the drawing pipe is positioned in a pipe fitting in a non-contact manner; the large lining core or the small lining core is locked on the drawing pipe through the draw-in bolt, a round copper pipe can be drawn into an H-shaped copper pipe more stably, the problem that a small-size copper pipe cannot be drawn to manufacture a special-shaped pipe is solved, and the drawn copper pipe is smooth in surface, free of garland, stable in external shape, small in stress deformation, accurate in forming size and high in production efficiency. After being formed, the pipe fitting does not rebound and expand and does not deform again, and the strength of the pipe fitting can be slightly increased in the drawing process.

Description

technical field [0001] The invention relates to the technical field of drawing pipes, in particular to an H-shaped copper pipe drawing die assembly. Background technique [0002] The pipe drawing die is mainly used to draw copper pipes, steel pipes and other pipes, and is used in conjunction with the core head or the moving core head (also known as the inner mold, also often called the lining core). The pipe drawing die controls the outer diameter of the pipe. The core head controls the inner diameter size of the pipe. [0003] The drawing die form used in the production of stainless steel thin-walled tubes is mainly a conical die. The hole type of the drawing die is mainly composed of three parts, namely the entrance cone (lubrication and deformation area), the sizing area and the exit cone. The shape and size of each part of the drawing die determine the composition, properties and size of the drawn pipe, the reduction rate, the quality of lubrication, the drawing condit...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an H-shaped copper tube drawing die assembly, which can more stably draw circular copper tubes into H-shaped copper tubes, and solve the problem that small-sized copper tubes cannot be pulled, which leads to the production of special-shaped tubes. Difficult problems, and the surface of the drawn copper tube is smooth without scratches, the external shape is stable, the amount of stress deformation is small, the forming size is accurate, there is no rebound expansion after forming, and it will not deform again, and the drawing process will increase more Small pipe strength

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