Precision forming method of aluminum alloy reinforcement plate rectangular forging part

Abstract

The invention provides a precision forming method of an aluminum alloy reinforcement plate rectangular forging part, and belongs to the technical field of die forging. The precision forming method includes the steps that four bosses are machined on the four corners of the upper surface of an aluminum alloy blank, and a through hole is formed in the middle of the aluminum alloy blank to obtain a preformed blank; the preformed blank is placed into an impression of a lower die in a boss downward mode, an upper die and the lower die are used for forging, and the aluminum alloy reinforcement platerectangular forging part is obtained; the upper surfaces of the bosses are transitioned to the upper surface of the blank through an oblique plane, and the diameter of the through hole is 5-10 mm larger than that of a concave die and a constraint platform corresponding to the through hole. According to the precision forming method of the aluminum alloy reinforcement plate rectangular forging part,the through hole is formed in the middle of the blank, a reverse loading mode is used for forging, the die pressure during forming is reduced advantageously, meanwhile, the folding defect can furtherbe avoided, and the cutting working amount is decreased.

Description

technical field [0001] The invention belongs to the technical field of die forging, and in particular relates to a precision forming method for rectangular forgings such as aluminum alloy ribbed plates. Background technique [0002] With the development of the aerospace industry, the requirements for light weight and high strength precision forgings, especially large precision forgings, are increasing. Among them, large precision forgings are difficult to produce by cold forming process due to the limitation of equipment tonnage and material plasticity, so isothermal precision forging method is widely used. [0003] Due to the large projected area of ​​ribbed rectangular forgings, excessive mold pressure is likely to occur during the isothermal precision forging process; at the same time, due to the thin web and high rib structure of ribbed rectangular forgings, the metal flow in the mold cavity is complicated, When the traditional positive loading method is adopted, in the...

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Problems solved by technology

[0003] Due to the large projected area of ​​ribbed rectangular forgings, excessive mold pressure is likely to occur during the isothermal precision forging process; at the same time, due to the thin web and high rib structure of ribbed rectangular forgings, the metal flow in the mold cavity is complicated, When the traditional positive loading method is adopted, in the early stage of forging forming, the metal at the corners will follow the middle metal to lift up as a whole (such as figure 1 shown), resulting in the confluence of metal outflow from the web and corners during the final closing stage of the mold (such as figure 2 As shown), there are folding defects in the transition zone between the web and the corner, which affects the forming quality of the forging

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