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Semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe

A double-layer composite and extrusion forming technology is applied in the direction of metal extrusion, metal extrusion dies, metal extrusion control equipment, etc., and can solve the problems of semi-solid multi-blank extrusion and connection of double-layer composite pipes that have not been found. Gap and other problems, to achieve the effect of reducing energy consumption, improving product quality, and reducing cost investment

Inactive Publication Date: 2007-08-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, the composite pipes produced by these two technologies have very obvious defects: there are gaps in the connection between the inner pipe and the outer pipe
Internationally, the exploration and research on the semi-solid multi-billet extrusion of double-layer composite pipes has not yet started; in China, no relevant reports have been found on the semi-solid multi-billet extrusion of double-layer composite pipes

Method used

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  • Semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe
  • Semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, technical scheme of the present invention is described further:

[0032] As shown in Figure 1, 1-outer extrusion rod; 2-inner extrusion rod; 3-inner extrusion cylinder; 4-outer extrusion cylinder; 5-annular semi-solid billet; 6-rod-shaped semi-solid billet; 7 -heating ring; 8-forming guide plate; 9-mandrel; 10-layer composite pipe; 11-die fixing screw; 12-extrusion die; 13-ejector rod; 14-worktable.

[0033] Figure-1 The connection relationship of each part in the mold assembly diagram: the outer extrusion rod 1 and the inner extrusion rod 2 are respectively fixed on the outer slider and inner slider of the double-action press, so that they can move up and down with the slider. An annular semi-solid billet 5 with a certain solid fraction is placed between the inner extrusion barrel 3 and the outer extrusion barrel 4 , and a rod-shaped semi-solid billet 6 with a certain solid fraction is placed inside the inner extrusion ba...

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Abstract

The present invention relates to semi-solid forming technology, and is especially semi-solid multi-blank extruding process and apparatus for forming double-layer composite pipe. The technological process includes the following steps: pre-heating the mold to 200-300 deg.c and establishing temperature control system, setting the induction heated blank into the extruding mold, and extruding at regulated speed and stroke to obtain the required composite pipe. The new extruding process for making composite pipe has short procedure, low power consumption and high product quality.

Description

technical field [0001] The invention relates to a double-layer composite pipe semi-solid multi-blank extrusion forming process and a device thereof, belonging to the technical field of semi-solid forming. Background technique [0002] The processing and manufacturing of double-layer composite pipe is an advanced forming technology developed in recent years, which is mainly used in the fields of electronic appliances, automobiles, building materials, HVAC, and aerospace. At present, the aluminum-plastic composite pipes on the market are produced by the butt welding process, and the stainless steel composite pipes are made of carbon steel strips and stainless steel strips by cladding production methods. In fact, the composite pipes produced by these two technologies have very obvious defects: there are gaps in the connection between the inner pipe and the outer pipe. In fields with extremely high requirements on strength and connection, such as aerospace, these gaps can pose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/22B21C31/00B21C26/00B21C35/02C10M103/02B21C25/02B21C23/01C10N40/36
Inventor 王开坤
Owner TSINGHUA UNIV
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