Cast spun aluminum alloy hub rim spinning formation method

An aluminum alloy wheel hub and spinning forming technology is applied in the field of compound spinning forming of the rim of the cast aluminum alloy wheel hub, which can solve the problems of inconspicuous flow lines of the spinning structure, insufficient deformation of the as-cast structure, affecting the safety of automobiles, etc. , to achieve the effect of improving the metal streamline organization, promoting the value, and improving the strength

Inactive Publication Date: 2018-09-14
CITIC DICASTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, after the metal at part A of the as-cast rim is spun by the wheel, when it is filled to the spun inner rim B, the deformation of the as-cast structure is insufficient, the streamline of the spinning structure is not obvious, and the original as-cast structure is destroyed. When the hub is subjected to a large radial impact load, the inner rim B is cracked, which seriously affects the safety of the car

Method used

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  • Cast spun aluminum alloy hub rim spinning formation method
  • Cast spun aluminum alloy hub rim spinning formation method
  • Cast spun aluminum alloy hub rim spinning formation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The feeding channel 6 of the newly cast rim 4 is set to 13.5mm; in order to ensure the sequential solidification of the cast rim, the inclination angle 7α of the blank of the newly cast rim 4 is 19°, and the outside inclination angle 8β of the blank of the newly cast rim 4 is 18°. The thickness at well 9 is 18.6 mm, which makes it have a certain structural gradient.

[0018] The casting process of the newly cast rim 4 adopts a water cooling method to cool the casting mold, especially the position of the inner rim. The casting mold preheating temperature is 320°C, the aluminum liquid temperature is 690°C, the holding pressure is 830mbar, the holding time is 130s, the cooling time after pressure relief is 25s, and the production cycle is increased from the original 5.5min / piece to 3.8 min / piece, casting production efficiency increased by 30.9%. The elongation rate of the rim is increased to more than 10%, and the elongation rate of the inner rim can be increas...

Embodiment 2

[0024] Example 2: The feeding channel 6 of the newly cast rim 4 is set to 15 mm; in order to ensure the sequential solidification of the cast rim, the inclination angle 7α of the blank of the newly cast rim 4 is set to 19°, and the outside angle of the blank of the newly cast rim 4 8β is set to 16° 1. The thickness of wheel well 9 is set to 19.5 mm, so that it has a certain structural gradient.

[0025] The casting process of the newly cast rim 4 adopts a water cooling method to cool the casting mold, especially the position of the inner rim. The casting mold preheating temperature is 380°C, the aluminum liquid temperature is 700°C, the holding pressure is 860mbar, the holding time is 150s, the cooling time after pressure relief is 35s, and the production cycle is increased from the original 6.5min / piece to 4.5 min / piece, the casting production efficiency is increased by 30.7%, the elongation rate of the rim is increased to more than 11%, and the elongation rate of the inner r...

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Abstract

The invention discloses a cast spun aluminum alloy hub rim spinning formation method, that is, a special spinning composite processing method that a spoke and inn edge of a hub are manufactured in a cast manner and the middle of a rim is of a spun structure. By adopting the method, properties, strength and cast structures of inner edges can be prevented from being damaged, the impact resistance ofa cast spun hub at inner edges can be effectively improved, the inner edge of the hub can be prevented from cracking under radial impact, the properties of the hub spun structures can be improved, the hub can be thinned, and lighting of hubs can be achieved.

Description

technical field [0001] The invention relates to the field of automobile wheel hub manufacturing, in particular to a wheel rim composite spinning forming method for a cast-spin aluminum alloy wheel hub. Background technique [0002] Casting and spinning (casting + spinning) aluminum alloy wheels are widely used in the field of cars due to their advantages of fast heat dissipation, light weight, energy saving, good comfort and beautiful appearance. Casting and forming, the thick cast rim is then formed into a suitable size and shape through strong hot spinning. After hot spinning, the metal grains in the large part of the rim become thinner and have obvious fibrous structure, which greatly improves the overall strength and corrosion resistance of the wheel. [0003] However, after the metal at part A of the as-cast rim is spun by the wheel, when it is filled to the spun inner rim B, the deformation of the as-cast structure is insufficient, the streamline of the spinning struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16B21D53/26B22D18/04
CPCB21D22/16B21D53/26B22D18/04B22D21/007B22D25/02B60B3/06B21H1/10B21D22/18B21D53/30B23P15/00B23P2700/50
Inventor 常海平张立娟徐世文阴学朴周宏伟王志学李瑞张金许大维
Owner CITIC DICASTAL
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