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Manufacturing method of aluminum alloy casting and automobile anti-collision beam applying aluminum alloy casting

A technology of aluminum alloy castings and manufacturing methods, which is applied to bumpers and other directions, can solve problems such as difficulty in fully utilizing foamed aluminum energy absorption, shock absorption, unstable product quality, and cumbersome procedures, so as to improve product qualification rate and production efficiency, The effect of reducing emissions and streamlining processes

Inactive Publication Date: 2020-11-24
CITIC DICASTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no matter which filling method is used, it is difficult to give full play to the energy-absorbing and shock-absorbing characteristics of aluminum foam. The existing filling technology generally has problems such as cumbersome procedures, high cost, and unstable product quality.

Method used

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  • Manufacturing method of aluminum alloy casting and automobile anti-collision beam applying aluminum alloy casting
  • Manufacturing method of aluminum alloy casting and automobile anti-collision beam applying aluminum alloy casting

Examples

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Effect test

Embodiment 1

[0031] The main body of the front anti-collision beam of a certain car: the casting dimensions are 1120×125×120mm, the alloy used is A356, the weight is 3.36kg, and the basic wall thickness is 4mm. figure 1 As shown on the left, the dotted box in the figure is a partial enlarged view, namely figure 1 On the right side; the silver-gray area is the built-in shaped aluminum foam, the base is pure aluminum, the weight is 0.58kg, and the equivalent volume density is 0.3-0.5g / cm 3 , The anti-collision beam forming process is low-pressure casting.

[0032] The specific steps are:

[0033] (1) Preparation and treatment of special-shaped closed-cell aluminum foam:

[0034] (a) Preparation process: thickening and stirring of aluminum melt → adding foaming agent and stirring → injecting the foam into the foam investment mold → heat preservation and foaming → cooling of the foam → special-shaped closed-cell aluminum foam, in which the viscosity enhancer and foam They are Ca and TiH2 re...

Embodiment 2

[0042] The main body of the front anti-collision beam of a certain car: the casting dimensions are 1140×145×170mm, the alloy used is Castasil-37, the weight is 5.12kg, and the basic wall thickness is 6mm. figure 2 As shown on the left, the dotted box in the figure is a partial enlarged view, namely figure 2 On the right side; the internal area is the built-in aluminum foam special-shaped parts, the base is pure aluminum, the weight is 0.86kg, and the equivalent volume density is 0.3-0.5g / cm 3 , The anti-collision beam forming process is low-pressure casting.

[0043] The specific steps are:

[0044] (1) Preparation and treatment of special-shaped closed-cell aluminum foam:

[0045] (a) Preparation process: thickening and stirring of aluminum melt → adding foaming agent and stirring → injecting the foam into the foam investment mold → heat preservation and foaming → cooling of the foam → special-shaped closed-cell aluminum foam, in which the viscosity enhancer and foam The...

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Abstract

The invention discloses a manufacturing method of an aluminum alloy casting and an automobile anti-collision beam applying the aluminum alloy casting. The manufacturing method comprises the followingsteps of S1, preparing special-shaped closed-cell foamed aluminum, specifically, tackifying and stirring an aluminum melt, adding a foaming agent and stirring, injecting a foam body into a foam investment, preserving heat and foaming, and cooling the foam body to obtain the special-shaped closed-cell foamed aluminum; S2, pretreatment of the special-shaped closed-cell foamed aluminum, specifically,soaking the special-shaped closed-cell foamed aluminum with a NaOH solution, washing with clear water, drying and heating; S3, preparing an aluminum alloy melt; S4, treatment of a casting mold, specifically, heating the casting mold, removing dust, uniformly spraying a coating on the inner surface of the mold, heating and preserving heat; and S5, casting forming, specifically, putting the special-shaped closed-cell foamed aluminum obtained after the step S2 is completed into a preheated casting mold, mold assembly in place, setting preset casting technological parameters, casting, and finallyobtaining a needed casting.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy castings, in particular to a method for manufacturing an aluminum alloy casting and an automobile anti-collision beam using the composite casting. Background technique [0002] Since entering the 21st century, with the rapid development of the automobile industry, the problems of energy crisis and environmental pollution have become increasingly prominent. Automobile lightweight can effectively reduce automobile fuel consumption and emissions, and has become one of the important development directions of the automobile industry. As one of the main components of automobile lightweight, anti-collision beam is an important part of automobile protection device, which is used to reduce the absorption of collision energy when the vehicle is collided, which not only protects the vehicle itself, but also reduces the damage to the collision object to a certain extent . Existing automobile anti-coll...

Claims

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Application Information

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IPC IPC(8): B22D25/00B22D21/04B60R19/22
CPCB22D25/005B22D21/04B60R19/22
Inventor 刘海峰韩星孙宇李鑫磊张壮熊国源杨小禹
Owner CITIC DICASTAL
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