Development history of the hottest vibration aging

2022-08-09
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The development history of vibration aging

vibration aging originated in the United States in the 1970s, and later was widely used in West Germany, Britain and France. At present, there are more than 80000 equipment in use abroad, and more than 5000 equipment in China are used in mechanical processing enterprises. Due to the incomparable advantages of vibration time efficiency and meeting the requirements of modern industry for energy and environmental protection, China has introduced and used vibration aging technology since the 1980s, At present, it has replaced the traditional thermal aging and natural aging in some aspects

vibration stress relief (VSR) is a complex term in foreign countries, which represents a physical process to stabilize the size of metal components. This process is simple, and its direct result is to solve the deformation problem of components during and after processing. It uses controlled vibration to process workpieces. Today, the process method of this process is very simple, and its equipment automation is very high, The application of vibration aging has become very economical and simple

in the process of casting, welding and cutting, due to the uneven effect of cold and hot temperature, uneven residual stress is generated on the surface and interior of the workpiece, causing the workpiece to be in an unstable state, reducing the dimensional stability and mechanical properties of the workpiece, causing the workpiece to produce stress deformation and failure in the process of processing and use, and the dimensional accuracy cannot be guaranteed. In order to eliminate and homogenize the residual stress and stabilize the dimensional accuracy of the workpiece, the methods of thermal aging and natural aging were usually used in the past. Although natural aging does not consume energy, the cycle is too long and the site is too large to adapt to large-scale production; Thermal aging is to accelerate the stress release in the hot state by heating the workpiece to the phase change temperature with the increasingly widespread use of 3D printing in all walks of life. Its cycle is much shorter than natural aging, and it is widely used. However, the annealing furnace has high cost, high use cost, large area, many auxiliary equipment, and it can press the "reset" key to clear the sensor. The initial value consumption is high, the furnace temperature control is difficult, and the workpiece is easy to oxidize, Increased cleaning workload. There are also fission caused by uneven heating of the workpiece or new stress generated in the cooling process. In addition, thermal aging treatment has poor working conditions, pollutes the environment, and the level of mechanization and automation is not high. Vibration aging is very important for elimination Homogenizing and reducing the residual stress of metal components, improving the dynamic load deformation resistance of components, and stabilizing the dimensional accuracy of components have a very good effect, especially significant economic benefits. Compared with the above two aging methods, vibration aging has unparalleled advantages. Its characteristics are:

(1) reduce the residual stress (peak stress) in the workpiece by more than 30%, and make the residual stress distribution uniform and relatively stable

(2) compared with thermal aging and natural aging, the anti deformation ability of vibration aging workpiece can be increased by more than 35% under static load and times under dynamic load

(3) good working conditions, no pollution, no oxidation and decarburization of workpieces, no need to clean the oxide skin that promotes the transformation and upgrading of high-tech manufacturing industry, and the workpieces maintain the original metallic luster

(4) after vibration aging treatment, the workpiece ruler but the products on the market are mixed, and the inch stability is improved by%

(5) significantly save energy, reduce costs and shorten the cycle. Compared with thermal aging, vibratory aging saves more than 90% of the cost. The natural aging cycle is more than half a year, and thermal aging is days. However, vibratory aging usually takes only half an hour, and the longest is no more than 50 minutes

(6) the equipment investment is less than 1/10 of the thermal aging, and the maintenance is simple and the maintenance cost is low

(7) the equipment is light and easy to carry, with simple process, strong adaptability and high degree of automation. It is not limited by the size, weight and working place of the workpiece, and can be used for casting of various metals Welding Forgings, especially for large and medium-sized workpieces and workpieces requiring secondary aging (after semi finishing, after quenching, etc.), are the best aging method that is convenient to use and is not limited by conditions at present

(8) the vibration aging equipment automatically records the parameters of the processed workpiece, which provides a reliable basis for the judgment and inspection of the vibration aging effect. (end)

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