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A combined die for pipe extrusion and expansion by split mold

A technology of combined mold and split mold, applied in the direction of metal extrusion molds, etc., to achieve the effect of stabilizing the experimental environment, accurate experimental results, and saving equipment and mold costs

Inactive Publication Date: 2016-06-29
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a difficulty in the extrusion of the split die, whether the two streams of metal can be re-extruded and welded together with high quality under high temperature and high extrusion pressure.

Method used

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  • A combined die for pipe extrusion and expansion by split mold
  • A combined die for pipe extrusion and expansion by split mold
  • A combined die for pipe extrusion and expansion by split mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a kind of split mold forming pipe extrusion and expansion combined mold

[0027] Such as figure 1 Shown, a kind of split mold forming pipe extrusion expansion combined mold comprises split extrusion die part (see figure 2 , for prior art) and bulging die part (see Figure 3 to Figure 5 ). The bulging die part includes a die set plate 15 that is fixed on the outside of the die base 13 in the split extrusion die, and the front surface of the die set plate (here, the side facing the extrusion direction of the extruded pipe is defined as the front face, and vice versa is the rear face). Surface) has a T-shaped guide chute (in the horizontal direction), and two left and right concave templates 17, 33 are installed in the T-shaped guide chute, and the left and right concave templates form a bulging cavity between the opposite end faces. Each of the concave templates is provided with an inclined guide hole cooperating with the inclined guide pillars 19, 34, a...

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PUM

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Abstract

The invention discloses an extrusion-expansion combination mold for a pipe formed by a flow dividing mold. In an extrusion mode of the flow dividing mold, two metal flows which are divided are difficultly re-extruded and welded together with high quality under the conditions of high temperature and high extrusion pressure. In the field, the welding quality is researched mostly on the basis of computer simulation according to simulation parameters. In order to fill in gaps in practice research of the field, the invention provides an extrusion-expansion combination mold form capable of performing an expansion experiment immediately after the flow dividing mold extrudes the pipe. The extrusion-expansion combination mold comprises a flow-dividing extrusion mold part and an expansion mold part. Extrusion and expansion experiments under different parameters are performed by using the mold, the welding quality of a welding belt of the pipe extruded by the flow dividing mold is inspected by expanding the pipe, and the influence on extrusion welding of the flow dividing mold caused by different extrusion parameters such as extrusion pressure, temperature, speed and friction coefficient is further explored by converting extrusion parameters.

Description

technical field [0001] The invention belongs to the field of inspecting the quality of pipe forming welded strips of a split mold. It is applied to the research of checking the extrusion welding quality of split-manifold die. With this kind of mold form, it is more convenient to carry out the bulging experiment immediately after the hot extrusion of the pipe, and explore the extrusion welding quality of the split mold. Background technique [0002] Split die extrusion has developed rapidly in recent years due to its advantages of high production efficiency, short cycle time, and the ability to produce profiles with complex sections and large wall thickness differences, and is widely used in extrusion machines without independent perforation systems. Civil and military pipes and hollow profiles of various specifications. However, there is a difficulty in split-die extrusion whether the two metal flows can be re-extruded and welded together with high quality under high tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02B21C37/06B21D39/20
Inventor 宋继顺王华龙芦富丽刘倩倩张鹰
Owner TIANJIN UNIVERSITY OF TECHNOLOGY