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Hydrostatic extrusion hollow profile device with movable core support for die core

A hollow profile and hydrostatic extrusion technology, which is applied in the field of hydrostatic extrusion hollow profile devices, can solve the problems of uneven wall thickness, transverse fracture and longitudinal fracture of the mold core, etc., so as to avoid uneven wall thickness and improve the force state, the effect of increasing stiffness

Inactive Publication Date: 2015-04-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a hydrostatic extrusion hollow profile device with a movable core support, which solves the problem that the core is prone to deviation during the hydrostatic extrusion process, resulting in uneven wall thickness of the profile, eccentricity, and even core failure. The problem of transverse fracture or longitudinal fracture

Method used

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  • Hydrostatic extrusion hollow profile device with movable core support for die core
  • Hydrostatic extrusion hollow profile device with movable core support for die core
  • Hydrostatic extrusion hollow profile device with movable core support for die core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 10 steel round pipes were produced by hydrostatic extrusion, the outer diameter of the finished product was 200 mm, and the inner diameter was 100 mm.

[0045] The inner diameter of the extrusion cylinder 4 is 200mm.

[0046] Blank 2 size: outer diameter 200mm, height 400mm.

[0047] The outer diameter of the second groove of the movable ring 10 is 110mm, the width is 10mm, and the depth is 4mm. The outer diameter of the fourth groove is 200mm, the width is 20mm, and the depth is 8mm.

[0048] The sealing ring 13 is divided into the first sealing ring 13-1 and the second sealing ring 13-2, both of which are O-shaped sealing rings. In the groove, its top protrudes from the second groove. The second sealing ring 13-2 has an outer diameter of 200mm, an inner diameter of 180mm, and a height of 20mm, and is stuck in the fourth groove, and its top protrudes from the fourth groove to realize sealing.

[0049]Mold core 5: the mold core 5 includes a cylinder and a truncated c...

Embodiment 2

[0061] The 7075 aluminum alloy square pipe was prepared by hydrostatic extrusion, the cross section of the pipe was rectangular, the outer dimension was 300mm×200mm, and the wall thickness was 10mm.

[0062] The cross-section of the extrusion cylinder 4 is rectangular, and the cross-sectional size of the inner wall is 300mm×200mm.

[0063] The blank 2 is a cuboid with a size of 300mm×200mm×100mm. At the center, a square cone whose base size is 30mm×20mm and whose height is 15mm is processed.

[0064] The sealing ring 13 is divided into three types, all of which are rectangular sealing rings with a cross-sectional size of 10mm×10mm, wherein the outer diameter of the first sealing ring 13-1 is 302mm×206×10mm, and the outer diameter of the second sealing ring 13-2 is It is 304mm×208×10mm, and the inner diameter of the third sealing ring 13-3 is 300mm×200mm×10mm.

[0065] Mold core 5: The mold core 5 includes two cuboids and a square cone. Wherein the size of the first cuboid i...

Embodiment 3

[0074] The hydrostatically extruded AZ80 magnesium alloy special-shaped pipe with an equilateral pentagonal cross section, the inner equilateral pentagonal circumscribed on a circle with a radius of 50mm, and a wall thickness of 20mm.

[0075] The inner wall of the extrusion cylinder 4 is an equilateral pentagon, circumscribed on a circle with a radius of 50mm.

[0076] The blank 2 is an equilateral pentagonal column, the outer pentagon is inscribed in a circle with a radius of 50mm, and the height is 70mm.

[0077] The sealing ring 13 includes a first sealing ring 13-1 and a second sealing ring 13-2, both of which are O-shaped sealing rings, with a cross-sectional size of 20mm×10mm. Wherein the outer diameter of the second sealing ring 13-2 is 50 mm, and the outer diameter of the first sealing ring 13-1 is 36 mm.

[0078] Mold core 5: Mold core 5 includes two equilateral pentagonal columns and a pyramidal body whose base is equilateral pentagonal, wherein the equilateral pen...

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Abstract

The invention discloses a hydrostatic extrusion hollow profile device with a movable core support for a die core. The hydrostatic extrusion hollow profile device comprises an extrusion barrel, the die core, an extrusion barrel base, the movable core support and a limiting element, wherein the extrusion barrel base is arranged at one end of the extrusion barrel; the die core is arranged in the extrusion barrel; the root part of the die core is fixed in the center of the extrusion barrel base; the limiting element is arranged on the side wall of the die core; the movable core support sleeves the outer wall of the die core in a supporting manner and is positioned above the limiting element, so as to support the core support and limit the motion of the core support; the inner wall of the movable core support slides along the side wall of the die core; the outer wall of the movable core support slides along the inner wall of the extrusion barrel. The hydrostatic extrusion hollow profile device has the advantages that the movable core support is additionally arranged on the die core, so that the stress state of the die core is improved, the rigidity of the die core is enhanced, and the intensity of the die core is improved.

Description

technical field [0001] The invention belongs to the field of hydrostatic extrusion equipment, in particular to a hydrostatic extrusion hollow profile device with a mold core and a movable support. Background technique [0002] Profiles are objects with certain geometric shapes made of iron or steel and materials with certain strength and toughness (such as plastic, aluminum, glass fiber, etc.) through rolling, extrusion, casting and other processes. Profiles are divided into solid profiles and hollow profiles. Hollow profiles refer to profiles with one or more closed through holes in the cross section, such as thick-walled round tubes, thin-walled round tubes, rectangular tubes, drop-shaped tubes, etc. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, construction, decoration, and chemical industry. [0003] Extrusion is one of the common preparation methods for hollow profiles, including mechanical extrusion and hydrostatic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/02B21D26/047
Inventor 张新平陈飞陈珊赵磊吴志林张灵骄黄先会丁晓煜
Owner NANJING UNIV OF SCI & TECH
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