Method fur forming aluminum base composite material thin wall part by current self-resistance heating

An aluminum-based composite material, heat forming technology, applied in the field of thermal processing, can solve the problems of waste of energy, poor forming quality of thin-walled parts, low heat utilization rate, etc., to improve energy utilization rate, facilitate plastic deformation, and temperature distribution uniform effect

Inactive Publication Date: 2010-09-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that when the particle reinforced aluminum matrix composite is stretched and formed, if only the blank is heated, the forming quality of the thin-walled part will be poor; if it is heated together with the mold, the heat utilization rate will be low and a large amount of energy will be wasted. Problem, providing a current self-resistance heating method for thin-walled aluminum matrix composite parts

Method used

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  • Method fur forming aluminum base composite material thin wall part by current self-resistance heating
  • Method fur forming aluminum base composite material thin wall part by current self-resistance heating
  • Method fur forming aluminum base composite material thin wall part by current self-resistance heating

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specific Embodiment approach 1

[0015] Specific implementation mode one: the following combination Figure 1 to Figure 4 Describe this embodiment, the molding device used in the method of this embodiment includes a power supply 1, a mold, an upper electrode splint 5, a lower electrode splint 6 and an infrared thermometer 8,

[0016] The mold includes an upper mold 2 and a lower mold 3, a blank holder 4 is arranged on the mold, and a pair of upper electrode splints 5 and lower electrode splints 6 corresponding to the upper and lower positions are arranged outside the blank holder 4, and the upper electrode splint 5 and the lower electrode splint The two electrodes clamped by 6 are respectively connected to both ends of the power supply 1, and the upper electrode splint 5 and the lower electrode splint 6 are kept insulated from the mold.

[0017] The current self-resistance heating method for forming thin-walled aluminum matrix composite parts comprises the following steps:

[0018] Step 1, placing the formin...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that a high-temperature-resistant mica sheet, ceramic or asbestos rubber plate is fixed between the upper electrode splint 5 and the lower electrode splint 6 and the mold to achieve insulation. Others are the same as in the embodiment. One is the same.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the current parameters output by the power supply 1 described in step 3 are: the voltage is 6V-8V, the current is 5000A-10000A, and the others are the same as Embodiment 1.

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Abstract

The invention relates to a method for forming an aluminum base composite material thin wall part by current self-resistance heating, which belongs to the field of heat processing. The invention aims to solve the problems of poor forming quality of a thin wall part just by heating a blank as well as low heat utilization ratio and great energy consumption by heating the blank together with a die when the stretching formation is carried out on a particle-reinforced aluminum base composite material. The method comprises the following steps of: 1. placing a forming device on a press machine; 2. pressurizing an upper electrode clamping plate, clamping the blank to be formed, switching on a power supply and heating the blank to be formed; 3. measuring temperature in real time by using an infrared thermometer and adjusting an output current parameter of a power supply in real time so that the heating speed of the blank to be formed reaches 5-20 DEG C / s; 4. when the blank to be formed reaches 350-450 DEG C, removing the pressure on the upper electrode clamping plate and pressurizing an edge press ring by the press machine so that the edge press ring compresses the blank to be formed on a lower die; and 5. pressing an upper die for descending and pressing the blank to be formed for forming.

Description

technical field [0001] The invention relates to a method for electric current self-resistance heating and forming thin-walled parts of aluminum-based composite materials, which belongs to the field of thermal processing. Background technique [0002] Particle reinforced aluminum matrix composites have the advantages of high strength, high hardness, and low density, and are widely used in high-tech fields. However, the material has poor plasticity and is difficult to form by conventional stretch forming processes, so thermoforming must be used. If the traditional billet heating is used, the bad material of the thin-walled parts will dissipate heat quickly, the temperature will be uneven, and the forming quality will be unstable; if the overall heating of the mold is used, that is, the mold and the billet will be put into the furnace together for heating, which can improve the forming quality. However, generally Under normal circumstances, the volume of the mold is much larger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 王国峰张凯锋
Owner HARBIN INST OF TECH
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