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Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same

A technology for an aluminum alloy wheel hub and a production method, which is applied to metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems that the spinning method cannot be adapted, and achieves less heating process times, good component replacement, and improved mechanical properties. Effect

Inactive Publication Date: 2014-07-23
宁波宝通轮业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the production equipment is limited and the product is more complicated, the method of spinning after forging cannot be adapted.

Method used

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  • Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same
  • Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same
  • Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1, see figure 1 Shown: the preparation of aluminum alloy wheel hub of the present invention adopts three-step aluminum alloy wheel hub production method. Specifically, the method sequentially includes the steps of cutting the aluminum alloy bar stock into blanks, cleaning the blank to remove oil stains, and heating the blank for heat preservation. Wherein, the step of heating and insulating the blank is as follows: heating the blank from room temperature to 450° C. in 20 minutes, and keeping it warm for 2 hours. Aluminum alloy bars can use Φ355mm bars. After that, proceed as follows in sequence:

[0034] A) Rough forging blank: Put the blank into the forging mold for rough forging of the press, and upset the blank into a spinning blank. Among them, the press can be a 2500T press.

[0035] B) Spinning: Put the spinning blank into the spinning mold on the three-spinner horizontal spinning machine, and spin the spinning blank into a thick wheel hub; among them,...

Embodiment 2

[0043] Example 2: The difference from Implementation 1 is that the step of heating and insulating the blank is as follows: heat the blank from room temperature to 500°C for 25 minutes, and keep it warm for 2.2 hours; Preheat from room temperature to 350°C; in step B), brush No. 38 cylinder oil on the surface of the outer cavity of the spinning die before spinning; in step C), put the rough shape of the hub into the forging for precision forging It takes 23 minutes to heat the rough wheel hub from room temperature to 490°C before entering the mold, and keep it warm for 2.2 hours. Wherein, No. 38 cylinder oil is adopted to replace the water-based release agent, and general graphite oil is not used as the lubricant for spinning, for the same reason that the water-based release agent is used in Example 1.

Embodiment 3

[0044] Example 3: The difference from Implementation 1 is that the step of heating and insulating the blank is as follows: heat the blank from room temperature to 550°C for 30 minutes, and keep it warm for 2.5 hours; in step B), the spinning mold is removed from the spinning mold for 15 minutes before spinning Preheat the room temperature to 380°C; in step B), brush No. 24 cylinder oil on the surface of the outer cavity of the spinning die before spinning; in step C), put the rough shape of the hub into the forging die for precision forging It takes 25 minutes to heat the rough wheel hub from room temperature to 500°C and keep it warm for 2.5 hours. Wherein, the water release agent is replaced with No. 24 cylinder oil, reason is the same as using No. 38 cylinder oil in embodiment 2.

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PUM

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Abstract

The invention discloses a three-step aluminum alloy hub producing method, which sequentially comprises the following steps of: cutting aluminum alloy bars into a blank, cleaning the blank to remove oil stain, heating and insulating the blank; roughly forging the blank: putting the blank into a forging die for rough forging in a press, and upsetting the blank into a spinning blank; spinning: putting the spinning blank into a spinning die on a spinning machine; and spinning the spinning blank into a rough hub; and performing precision forging: putting the rough hub into a forging die for precision forging in the press, and spinning the spinning blank into a hub. The method has the advantage of low requirement for the travel of the spinning machine on the premise that the quality of the hub is ensured and the cost is low. The invention also discloses the forging dies and the spinning dies which are used in the method.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy wheel hub preparation, in particular to a three-step aluminum alloy wheel hub production method. Background technique [0002] At present, aluminum alloy wheels are being more and more widely used in the automotive field, and the manufacturing process mostly adopts die-casting process or integral forging process. Among them, when the die-casting process is adopted, the aluminum alloy wheel prepared inevitably has casting defects and low mechanical properties; when the integral forging process is adopted, the production cost is relatively high. After improving the above method, the production method of spinning after forging appeared, which better solved the above defects. However, the method of spinning after forging is limited by the working stroke of the production equipment. That is, if the stroke of the spinning machine is small, only small-sized products can be produced. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21J13/02B21D37/10
Inventor 徐国兴刘军徐敬捷
Owner 宁波宝通轮业有限公司
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