Method for cutting residual stress in sawing area by ultrasonic vibration after aluminum alloy medium and heavy plate prestretching
A residual stress, aluminum alloy technology, applied in the field of aluminum alloy processing, can solve problems such as limitations, achieve the effect of good effect, simple method and steps, and broaden the scope of application
Active Publication Date: 2013-08-28
广西南南铝加工有限公司
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However, due to its cost, aluminum alloy plates are mostly limited to use in the aerospace industry
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[0025] see figure 1 , based on the previous data statistics, provide boundary conditions for the computer simulation, and the simulation confirms the clamping area 1, the transition area 2, and the stretching area 3 of the aluminum alloy plate clamp. The effect of residual stress relief in stretching zone 3 is better, and the transition zone 2 and clamping zone 1 are both areas to be cut before, collectively referred to as the sawing zone. Determine this area to prepare for the reduction of residual stress in the later stage of regional vibration.
[0026] see figure 2 , arrange the ultrasonic vibration device 4 . The left and right positions of the ultrasonic vibrating devices 4 are symmetrically distributed. But the positions of the ultrasonic generating devices 4 on each side are not strictly equidistant. Ultrasonic synchronization output control. , using a working frequency of 16-20kHz, amplitude: 30-60μm. Excitation time, <5min; working frequency <20khz, to avoid r...
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The invention discloses a method for cutting residual stress in a sawing area by ultrasonic vibration after aluminum alloy medium and heavy plate prestretching. The method comprises the steps of: 1. on the basis of early statistical data, providing boundary conditions for computer simulation, and conducting a simulation to confirm a jig clamping area and a stretching area of an aluminum alloy medium and heavy plate; testing to obtain a residual stress transition area after aluminum alloy medium and heavy plate prestretching; 2. according to the tested statistical data, using computer simulation to predict the residual stress transition area after aluminum alloy medium and heavy plate prestretching through a commonly used finite element method; 3. employing an ultrasonic vibrator as the vibration source; and arranging an ultrasonic generator in the transition area so as to make ultrasonic impact force act on the surface of medium and heavy plate transition area uniformly; 4. then usinga controller to control the ultrasonic vibrator synchronously and engendering synchronized output of the vibrator; 5. testing the distribution characteristics of the residual stress in the transitionarea, and combining computer simulation analysis to evaluate the sawing area.
Description
technical field [0001] The invention relates to a method for processing an aluminum alloy, in particular to a method for reducing residual stress in a sawing area after a pre-stretching method for an aluminum alloy medium-thick plate. Background technique [0002] Thanks to the development, production and use of large-scale hot rolling mills, a large number of high-quality aluminum alloy plates have come out. Since the large-scale overall medium-thick plate replaces the traditional structural riveted skin plate, the weight of the aircraft body is greatly reduced, and the strength of the alloy is guaranteed at the same time. Therefore, aluminum alloy plate plays an important role in the application of aerospace industry. According to statistics, in the aircraft manufacturing of Airbus in 2010, the total consumption of aluminum alloy was as high as 100kt. Its latest A380 airliner uses aluminum to account for 22% of the total material consumption. . The total aluminum alloy...
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IPC IPC(8): C22F3/00
Inventor 周智辉梁国张良军黄祖寅周毅艺胡少莉许红梅
Owner 广西南南铝加工有限公司