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Extrusion die as well as extrusion method and application thereof

A technology of extrusion dies and extrusion devices, which is applied in the direction of metal extrusion dies, metal extrusion, metal extrusion control equipment, etc., can solve the problems of small size and difficult realization, achieve quality improvement, reduce energy consumption, The effect of good organization and performance

Inactive Publication Date: 2016-03-02
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technical means are limited to laboratory-scale research at present, and have not been directly applied to the actual extrusion of magnesium alloys and aluminum alloys. Relatively small, and these technologies are limited to extruding solid rods, for large profiles with complex cross-sections with hollow structures, equal channel extrusion is difficult to achieve

Method used

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  • Extrusion die as well as extrusion method and application thereof
  • Extrusion die as well as extrusion method and application thereof
  • Extrusion die as well as extrusion method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Magnesium alloy AZ31b is carried out extruding, the method for extruding, comprises the following steps:

[0035] 1. Preheat the extruded billet, the preheating temperature is 400°C; fill the extrusion cylinder with billet and extrusion pad;

[0036] 2. Run the extruder, squeeze the billet into the split hole of the upper die through the extrusion rod, the angle between the upper section 4 and the lower section 5 of the split hole is 120°, and the extrusion speed is 0.4mm / s. The pressure is 8000kN, the blank undergoes plastic shear deformation in the split hole, and the grains are refined and uniform;

[0037] 3. The blank is welded in the welding room, and the welding temperature is 430°C;

[0038] 4. The final blank is extruded through the lower die to form a profile. The obtained profile has a width of 55mm and a wall thickness of 1.1mm, such as image 3 and Figure 4 As shown, it can be seen that the structure is uniform, the profile size is regular, the welding ...

Embodiment 2

[0040] Aluminum alloy AA6082 is extruded, and the method for extruding comprises the following steps:

[0041] 1. Preheat the extruded billet, the preheating temperature is 380°C; fill the extrusion cylinder with billet and extrusion pad;

[0042] 2. Run the extruder, squeeze the billet into the split hole of the upper die through the extrusion rod, the angle between the upper section 4 and the lower section 5 of the split hole is 135°, and the extrusion speed is 0.4mm / s. The pressure is 7000kN, the blank undergoes plastic shear deformation in the split hole, and the grains are refined and uniform;

[0043] 3. The blank is welded in the welding room, and the welding temperature is 410°C;

[0044] 4. The final billet is extruded through the lower die to form a profile. The obtained profile has a diameter of 55 mm and a wall thickness of 1.1 mm. like Figure 5 As shown, it can be seen that the structure is fine and uniform, the profile size is regular, and the welding is good...

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Abstract

The invention discloses an extrusion die as well as an extrusion method and an application thereof. The extrusion die comprises an upper die and a lower die mounted below the upper die, wherein at least two flow splitting holes are formed in the upper die, each flow splitting hole is divided into an upper section and a lower section, and an included angle is formed between the upper section and the lower section of each flow splitting hole; a die core is arranged at the lower end of the upper die; a welding chamber is defined by the lower surface of the upper die, the inner surface of the lower die and the die core, a discharge port is formed in the lower end of the welding chamber, the die core extends into the discharge port, and an extrusion forming channel is formed. Blanks are extruded and deformed in the flow splitting holes, severe plastic shearing deformation is caused, tissue of the blanks in the welding chamber can be uniform and fine, and accordingly, final sectional materials have good tissue and performance; texture in the extrusion process can be reduced; the quality of weld joints can be improved; extrusion force can be reduced, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of plastic processing, and in particular relates to an extrusion die, an extrusion method and an application thereof. Background technique [0002] Magnesium and aluminum alloy are used as light metal structural materials, which can replace plastic and steel parts. It has a series of advantages such as low density, good thermal conductivity, good damping, vibration and noise reduction, excellent machining performance, and stable parts dimensions, and has a wide range of application prospects. Magnesium and aluminum alloys often use extrusion technology for plastic processing of profiles, and the corresponding molds often use planar splitter molds. Partial composition. The grain deformation of this extrusion method is single, and the two-dimensional shear accumulated deformation in the extrusion direction is small. Therefore, the base surface texture of the profile is obvious, and the structure is not uniform, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/21B21C31/00
CPCB21C25/02B21C23/21B21C31/00
Inventor 林涛刘运腾周吉学王金伟庄海华
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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