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Strong-shear rolling forming method and device for metal plate

A metal sheet, strong shearing technology, applied in metal rolling, metal rolling, forging and pressing devices, etc., can solve the problems of inconvenient, inability to extrude the mold, and high cost of the equal diameter angle of the mold, and achieve large-scale The effect of industrialized production, improvement of mechanical properties and grain refinement

Active Publication Date: 2015-05-27
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods and devices still have some deficiencies: one is that the angle of the isometric angle of the mold cannot be adjusted conveniently and flexibly, and it is necessary to make molds with different isometric angles, and the cost is high; the other is that the rolled plate is difficult to pass through the mold smoothly. That is, the plate has completed the rolling deformation, but cannot completely pass through the equal-diameter angle extrusion die to complete the shear deformation

Method used

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  • Strong-shear rolling forming method and device for metal plate
  • Strong-shear rolling forming method and device for metal plate
  • Strong-shear rolling forming method and device for metal plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Rolling of AZ61 magnesium alloy sheet

[0029] The blanks are two AZ61 magnesium alloy extruded plates (the sample numbers are #1 and #2 respectively), and the dimensions before rolling are both 500mm×100mm×5mm. The metallographic microstructure of the plate before rolling is as follows figure 2 As shown, the average grain size is 21.5 μm. The following experiments are carried out on sample 1 using the method and device designed by the present invention:

[0030] (1) Unload the oil cylinder 8 so that the lower movable mold plate 6 is placed flat on the base 9, and the AZ61 magnesium alloy plate 3 to be rolled is placed between the upper fixed mold 2 and the lower fixed mold 11 and the movable mold There is a metal plate passage between the upper template 5 and the lower template 6 of the movable die, and the plate extends out of the exit of the metal plate passage.

[0031] (2) Use a wrench to adjust the bolts between the upper template 2 of the fixed mold and the...

Embodiment 2

[0041] Example 2: Rolling of 6016 aluminum alloy plate

[0042] Two pieces of 26mm thick 6016 aluminum alloy ingots (sample numbers are #3 and #4 respectively), using the method and device designed in the present invention to carry out the following experiment: using a method similar to that of Example 1, put the blank #3 ( The mold is preheated to 450°C, the blank is kept at 450°C for 2h), the 6016 plate is rolled to a thickness of 2mm through multiple passes, and then samples are taken for metallographic observation and mechanical property testing. For comparison, normal rolling deformation was performed on #4 sample, and the rolling temperature, pass deformation and total deformation were all consistent with #3.

[0043] After rolling, the pole figures of #3 and #4 plates are as follows Figure 4 (a) and (b). It can be seen from the figure that after the intensive shear deformation of the die with an included angle of 120°C, the #3 sheet formed an obvious shear texture. Table ...

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Abstract

The invention discloses a strong-shear rolling forming method and a strong-shear rolling forming device for a metal plate. Power is provided by friction force between the plate and rollers during rolling deformation, and the plate is subjected to the strong-shear deformation of dies, and then enters a part between the rollers for plate rolling deformation. The device comprises a double-roller rolling mill, a movable die upper template, a movable die lower template, a stand, a fixed die lower template and a fixed die upper template, wherein the fixed die lower template is fixedly arranged on the stand; the movable die lower template is hinged to the fixed die lower template, and is arranged on the stand through an oil cylinder; the fixed die upper template and the movable die upper template are arranged on the fixed die lower template and the movable die lower template through bolts respectively; the double-roller rolling mill is arranged at an outlet of a metal plate passage. The method and the device are flexible in die equal channel angular adjustment and low in cost; the rolling deformation and the shear deformation of the metal plate such as a magnesium plate and an aluminum plate can be effectively combined, crystal grains of the plate can be refined, the texture evolution of the plate can be controlled, and the mechanical performance and the forming performance of the plate can be improved.

Description

Technical field [0001] The invention relates to a method and device for forming a metal sheet by strong shearing and rolling. Background technique [0002] Lightweight alloys such as magnesium and aluminum alloys, due to their low density, high specific strength and specific stiffness, good elasticity, good impact resistance, corrosion resistance, easy surface coloring, good processing and formability, and high recycling and recyclability. Performance, and widely used in aerospace, transportation, energy electronics, engineering machinery and other fields. At present, aluminum and magnesium plates have quickly entered the automotive industry and become the preferred materials for automotive lightweighting. The National "Twelfth Five-Year Plan for New Material Industry" proposes to develop 6016, 6022, 6111 aluminum alloy plates for automobiles, to realize the industrialization of automobile aluminum alloy plates with a thickness of 0.7-2.0mm and a width of 1600-2300mm, and develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B15/00
CPCB21B1/22B21B15/0035
Inventor 刘文辉邱群袁思雨陈宇强唐昌平唐玉波
Owner HUNAN UNIV OF SCI & TECH
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