Isothermal forging forming die and method for 7075 aluminum alloy tapered casing

A technology for isothermal die forging and forming dies, which is used in manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc. It can solve the problems of surface coarse grain defects, forming difficulties, flow line disorder, etc., and achieve high production efficiency. Reduce cutting workload and improve the effect of mold design

Active Publication Date: 2013-11-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of folding, streamline disorder, surface coarse grain defects and difficult forming in the manufacture of 7075 aluminum

Method used

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  • Isothermal forging forming die and method for 7075 aluminum alloy tapered casing
  • Isothermal forging forming die and method for 7075 aluminum alloy tapered casing
  • Isothermal forging forming die and method for 7075 aluminum alloy tapered casing

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specific Embodiment approach 1

[0023] Specific implementation mode one: combine Figure 1-Figure 4 To illustrate this embodiment, a 7075 aluminum alloy conical casing isothermal die forging forming die of this embodiment includes an upper die 10, a push rod 11 and a lower die 12, and the middle part of the upper surface of the lower die 12 is sequentially processed from top to bottom Die cavity 12-1 and ejection hole 12-2 are arranged, and die cavity 12-1 and ejection hole 12-2 run through, and the shape of die cavity 12-1 is conical, and the middle part of the lower surface of upper mold 10 is processed with The punch 10-1 matched with the mold cavity 12-1 is provided with four lug grooves 12-4 on the edge of the upper surface of the lower die 12, wherein two lug grooves 12-4 are placed against each other, and the other two The lug grooves 12-4 are placed against each other, and the two lug grooves 12-4 and the other two lug grooves 12-4 are arranged oppositely, and eight lug grooves are arranged on the inne...

specific Embodiment approach 2

[0025] Specific implementation mode two: combination figure 2 To describe this embodiment, the side of the upper mold 10 of this embodiment is provided with an upper clamping groove, and the side of the lower mold 12 is provided with a lower clamping groove 12-3. Such setting facilitates die clamping and fixing of the upper die 10 and the lower die 12, and facilitates the final forging of the conical casing forging.

specific Embodiment approach 3

[0026] Specific implementation mode three: combination Figure 1-Figure 17 This embodiment is described. In this embodiment, the isothermal die forging forming method of 7075 aluminum alloy conical casing is realized by using the isothermal forging forming die of embodiment one or two. The 7075 aluminum alloy conical casing is isothermal forging forming The method is realized according to the following steps: 1. Blank making: put the cylindrical 7075 aluminum alloy blank into a box-type heating furnace and heat it to 100-150°C, then take it out and spray graphite emulsion solution evenly on its surface, and then The billet sprayed with the graphite emulsion aqueous solution is put into a box-type heating furnace and heated to 420°C-440°C, and kept warm for 2.5-3.5 hours. The surface of the cavity of the anvil upsetting mold is uniformly sprayed with graphite emulsion solution, and then the flat anvil upsetting mold sprayed with graphite emulsion solution is heated to 420-430°C...

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Abstract

The invention discloses an isothermal forging forming die and method for 7075 aluminum alloy tapered casing and relates to an aluminum alloy part forming die and method to solve the problems of folding, streamline disorders, surface coarse grain defects and forming difficulties in manufacturing of 7075 aluminum alloy tapered casing in the prior art. The method comprises main steps of first, blank making, wherein a cylindrical 7075 aluminum alloy blank material is subjected to flat drilling upsetting to be manufactured into a formed blank; second, pre-forging, wherein the blank is placed in a female die of a pre-forging die for pre-forging forming to be produced into a formed pre-forged part; third, primary finish forging, wherein the primary finish forging is performed to manufacture a formed primary finished forged part; fourth, primary cleaning; fifth, damage repairing; sixth, secondary finish forging, wherein the secondary finish forging is performed to manufacture a secondary finished forged part; seventy, secondary cleaning, wherein graphite on the surface is cleared away. The isothermal forging forming die and method are used for manufacturing of 7075 aluminum alloy tapered casing.

Description

technical field [0001] The invention relates to an aluminum alloy part forming die and method, in particular to a 7075 aluminum alloy conical casing part isothermal forging forming die and method. Background technique [0002] 7075 aluminum alloy is a kind of Al-Zn-Mg-Cu ultra-high-strength aluminum alloy, which is widely used in aviation, aerospace and other fields. Aerospace forgings not only require high dimensional accuracy and good mechanical properties, but also require good streamline distribution, which makes the forming of such forgings more and more difficult. Due to the narrow forging temperature range of aluminum alloy, if the forming temperature is too low, the temperature of the blank will drop rapidly. This will not only increase the deformation resistance and reduce the plasticity of the material, but also produce defects such as coarse grains, mixed grains, dissatisfaction, folding, streamline disorder, and surface coarse grains, which will not be able to m...

Claims

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Application Information

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IPC IPC(8): B21J13/02B21J5/02
Inventor 袁林徐福昌单德彬
Owner HARBIN INST OF TECH
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