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Pressure-torsion forming method of high-strength aluminium-alloy disc-shaped workpiece

A forming method and technology of aluminum alloy, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of poor circumferential mechanical properties of aluminum alloy materials, etc., and achieve the effect of simple structure, good mechanical properties and convenient operation

Active Publication Date: 2014-01-01
中国原子能工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is proposed in order to overcome the shortcomings of the prior art, and its purpose is to provide a press-torsion forming method for high-strength aluminum alloy disc-shaped workpieces, so as to solve the poor circumferential mechanical properties of aluminum alloy materials for conventional forged disc-shaped parts The problem

Method used

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  • Pressure-torsion forming method of high-strength aluminium-alloy disc-shaped workpiece
  • Pressure-torsion forming method of high-strength aluminium-alloy disc-shaped workpiece
  • Pressure-torsion forming method of high-strength aluminium-alloy disc-shaped workpiece

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Embodiment 1

[0033] Such as figure 1 , 2 As shown, for No. Ⅰ disc-shaped workpiece 1, its alloy grade is 7075 aluminum alloy, the outer diameter of the workpiece is D=100-200mm, the height H=10-50mm, d=5-30mm, h=8-20mm, according to the workpiece According to the shape and characteristics of the 7075 aluminum alloy material, the process characteristics of the 7075 aluminum alloy material and the final part The size of the specification, the extrusion rod of φ75mm is used as the No. 1 blank 6, and the height of the blank is 30-100mm. Both the mold and the blank are heated to 360-480°C and kept warm for 1 hour, and then molded and twisted on a press-torsion molding machine. The molding pressure is 500-5,000 tons, the torsional torque is 10,000-200,000 N m, and the torsional speed is 1 per minute. ~5 rotations, when the pressure is twisted until the disc-shaped workpiece reaches the limit size, then twist 2 to 5 turns, finally release the pressure and eject the workpiece from the mold, afte...

Embodiment 2

[0037] Such as image 3 , 4 As shown, for No. Ⅱ disc-shaped workpiece 7, its alloy grade is 7A04 aluminum alloy, the outer diameter of the workpiece D=120-300mm, the height H=10-50mm, d=5-30mm, h=8-20mm, s= 50 ~ 100mm, according to the shape and characteristics of the workpiece, design and process No. Ⅱ upper mold 8, No. Ⅱ lower mold mold cover 9, No. Ⅱ lower mold core 10 and No. Ⅱ ejector core rod 11, according to 7A04 aluminum alloy material The technological characteristics of the process and the specifications of the final piece, the ingot of φ80mm is used as the No. Ⅱ blank 12, and the height of the blank is 20-80mm. Both the mold and the blank are heated to 360-480°C and kept warm for 1 hour, and then molded and twisted on a press-torsion molding machine. The molding pressure is 500-5,000 tons, the torsional torque is 10,000-200,000 N m, and the torsional speed is 1 per minute. ~5 rotations, when the pressure is twisted to the limit size of the disc-shaped workpiece, t...

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Abstract

The invention discloses a pressure-torsion forming method of a high-strength aluminium-alloy disc-shaped workpiece. The pressure-torsion forming method comprises the following steps: (i) heating of a mold and a blank, namely heating the mold and a rough blank till the pressure-torsion temperature is 360-480 DEG C, and carrying out heat insulation for 1 hour; (ii) pressure-torsion deformation, namely carrying out pressure-torsion deformation on the blank by utilizing the mold on a pressure-torsion forming machine, wherein the pressing pressure is 500-5000ton, the torque of torsion is 10000-200000N / m, the torsion speed is 1-5t / m, and when the disc-shaped workpiece is pressed and torsioned to the limited size and then is twisted by 2-5t, the temperature of the mold and the temperature of the blank are maintained to be 360-480 DEG C in the twisting process; (iii) cooling and after treatment, namely carrying out air cooling on the blank formed by pressure torsion, and then carrying out the following fly-edge turning and the following heat treatment. The pressure-torsion forming method disclosed by the invention has the advantages that the operation is convenient, crystal streamlines of a material are in circumferential distribution, and the pressure-torsion forming method is especially applicable to the 7XXX-type high-strength aluminium-alloy disc-shaped workpiece with the tensile strength being larger than 500MPa.

Description

technical field [0001] The invention belongs to a material processing and forming method, in particular to a press-torsion forming method for large plastic deformation of a high-strength aluminum alloy disc-shaped workpiece. Background technique [0002] The high-strength aluminum alloy dish-shaped workpiece is an important high-specific-strength component of high-speed rotating equipment. Under the action of centrifugal force, the hoop force is the main force direction, so the hoop mechanical properties of the material are highly required. Conventional production of aluminum alloy butterfly parts generally adopts the method of die forging, and adopts the method of stamping the upper and lower dies to forge the blank directly. The streamline of the grain of the material forged by this technology is generally radial, and the shape of the material The variable is also relatively small, which cannot give full play to the high-strength characteristics of the material. If the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02B21D37/10
Inventor 吴雷寇益强韩秋良吴福赵凯李昂郑晓静高蔚
Owner 中国原子能工业有限公司
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