Method for billow forming magnesium alloy thin plate

A technology of inflatable forming and magnesium alloy plates, which is applied in the field of magnesium alloy air inflatable manufacturing, can solve the problems of excessive burr waste, difficulty in achieving lightness and thinness, and high manufacturing costs, and achieves low forming pressure, low manufacturing cost, and smooth process. simple effect

Inactive Publication Date: 2007-01-31
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned manufacturing method is difficult to meet the requirements of light, thin, and short products, and the product has more burrs and waste, and the manufacturing cost is higher.

Method used

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  • Method for billow forming magnesium alloy thin plate
  • Method for billow forming magnesium alloy thin plate

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific Embodiment 1: In this embodiment, the magnesium alloy thin plate is subjected to inflation forming as follows: a. Heating process: the magnesium alloy sheet is loaded into a mold, and then the sheet is heated to an inflation forming temperature of 200-400°C, The holding time is 10 to 60 minutes to ensure that the sheet is heated evenly; b. Pressurization process: apply a compressive load on the mold to press the die, ventilation plate and sheet; c. Expansion process: to the mold Fill the gas with a pressure of 0.1-0.8 MPa and keep the pressure for 10-30 minutes to make the sheet expand into the mold cavity; d. Forming process: continue to increase the air pressure into the mold to make it reach 1~1.5MPa, keep the pressure for 10~30 minutes, make the sheet material gradually adhere to the surface of the mold cavity, until the mold is completely filled, forming a part with the same surface as the mold, and finally cooled and demoulded to complete the finished prod...

specific Embodiment approach 2

[0011] Embodiment 2: The plate material of this embodiment is a Mg—Zn—Zr thin plate 4 with a thickness of 1 mm and a grain size of 8 μm. The heating process is carried out in a superplastic molding machine (such as figure 1 As shown), the superplastic molding machine is composed of a furnace body 2, an indenter 1 above the furnace body 2, a cover plate 9 connected to the indenter 1, and a support frame 7 placed inside the furnace body 2. The forming mold structure consists of Die 3, ventilation plate 5, gas filling port 8 and vent tube 6 are formed, and die 3 and vent plate 5 are arranged up and down, and gas charging port 8 is opened on the ventilation plate 5, and vent tube 6 communicates with gas charging port 8. Ventilation plate 5 is placed on the support frame 7, sheet material 4 is placed on the ventilation plate 5, and die 3 is placed on the sheet material 4. Then heat the sheet material 4 to the forming temperature of 300°C, keep it warm for 30 minutes, move the pres...

specific Embodiment approach 3

[0012] Embodiment 3: The sheet material of this embodiment is a 0.8 mm thick Mg—Zn—Zr sheet 4 with a grain size of 7 μm. The heating process is carried out in a superplastic molding machine (such as figure 1 shown), put the sheet 4 on the ventilation plate 5, and put the die 3 on the sheet 4, then heat the sheet 4 to the forming temperature of magnesium alloy at 300°C, keep it warm for 30 minutes, and place the indenter 1 and the cover plate 9 move down until the mold die 3, the vent plate 5 and the sheet material 4 are pressed tightly; the gas filled into the vent plate 5 during the expansion process is argon, and its pressure is 0.1MPa, keeping Press for 20 minutes to make the sheet material 4 produce suitable plastic deformation; in the molding process, continue to add air pressure to the ventilation plate 5 to 0.9MPa, and keep the pressure for 10 minutes to make the sheet material fully fill the mold (such as figure 2 Shown); finally release the argon in the molded part ...

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Abstract

The invention is a magnesium alloy sheet puffing shaping method relates to magnesium alloy puffing shaping production technique. The magnesium alloy sheets are puffing shaped in following steps: a. the sheets are heated to puffing shaping temperature 200 to 400 deg. C and keep the temperature for 10 to 60 minutes after brought into moulds; b: apply compressing load in axial direction in the moulds; c. aerate in the mould with air pressure 0.1 to 0.8 MPa and keep the pressure for 10 to 30 minutes; d. go on to increase the air pressure in the mould to 1 to 1.5 MPa and keep the pressure for 10 to 30 minutes to obtain a piece of the same moulding surface with the mould and finally the product after cooling and demoulding. By applying puffing shaping method to magnesium alloy piece production the invention provides the magnesium alloy material shaping with an economy, efficient and practical production technique which has advantages such as high thin wall shaping performance, high passing percent, high shaping accuracy, high material using ratio, lowering the piece weight, saving the cost, simple technique and so on.

Description

Technical field: [0001] The invention relates to a manufacturing method of a magnesium alloy gas expansion type. Background technique: [0002] Magnesium alloy has the advantages of low density, high specific strength, vibration damping, good machinability, high electromagnetic barrier, good castability and recyclability. It is a lightweight material that can meet the needs of various industries and has great development prospects. Alloy materials have been widely used in many fields such as automobiles, computers, communications and aerospace. At present, magnesium alloy forming methods include die-casting method and semi-solid forming method. The die-casting method is to heat the magnesium ingot to a liquid state, apply pressure and inject it into the mold cavity, and form a magnesium alloy product after cooling. The magnesium alloy die-casting produced by this method has a relatively high void problem, and often requires a lot of manual post-processing, and its pass rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/00B21D26/02B22D23/00B21D26/021B22D17/06
Inventor 于彦东张凯峰
Owner HARBIN UNIV OF SCI & TECH
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