20Khz 800w Ultrasonic ageing impact gun for Ultrasonic welding stress relief
| Model No. |
UIT20 |
| Ultrasonic Frequency |
20Khz |
| Maximum Output |
800 Watt |
| Amplitude |
40um |
| Power Supply |
220V / 50-60 Hz |
| Ultrasonic Generator |
Size |
250(W) x 310(L) x 135(H) mm |
| Weight |
5 Kg |
| Feature |
Ultrasonic Amplitude Adjustable |
Ultrasonic aging treatment equipment is mainly used to: eliminate internal stress and weld toe surface defects caused by the welding process; prevent deformation or cracking of the workpiece due to stress release, and inhibit crack initiation; improve the yield strength and fatigue life of the weld, and increase the surface hardness.
Tests have proved that the stress relief rate of workpieces treated by the ultrasonic aging device can reach more than 80%. The deformation of the workpieces caused by stress concentration can be completely changed, and the fatigue life can be increased by an order of magnitude.
working principle:
Ultrasonic aging treatment equipment: Use high-power ultrasonic to push the impact tool to impact the surface of metal objects at a frequency of more than 20,000 times per second. Due to the high frequency, high efficiency and large energy of the ultrasonic wave, the metal surface produces greater compression plasticity Deformed. At the same time, the ultrasonic shock wave changes the original stress field, produces a certain value of compressive stress, and strengthens the ultrasonic shock part.
The ultrasonic drive power supply is connected with the ultrasonic transducer arranged in the shell through a cable, the vibration output end of the transducer is connected with the horn, and the end of the horn is equipped with an impact needle.
The ultrasonic driving power supply converts the mains electricity into high frequency and high voltage AC current, which is output to the ultrasonic transducer, and then the ultrasonic transducer converts the input electric energy into mechanical energy, namely ultrasonic, its manifestation is that the transducer stretches back and forth in the longitudinal direction Movement, the frequency of the telescopic movement is equal to the frequency of the AC current of the driving power supply, and the displacement of the telescopic movement is about ten micrometers.
The function of the horn is to amplify the output amplitude of the transducer to more than 100 microns, and on the other hand to apply an impact force to the impact pin to push the impact pin forward at high speed. After the impact pin impacts the workpiece, the energy is transferred to the weld to achieve the effect of eliminating internal stress.
The impact head rebounds after being reacted by the workpiece, and when it encounters the high-frequency vibrating horn, it is excited again and hits the weld at high speed again. Repeat this many times to complete the impact operation.
1. Ultrasonic aging treatment can significantly improve the fatigue life and fatigue strength of welded joints. Treat the weld toe part after welding to make it smooth transition, thereby reducing the stress concentration caused by the excess height, eliminating the defects of the weld toe surface, and generating large compressive plastic deformation at the weld toe, generating residual compressive stress, and adjusting the welding residual stress field , And strengthen and harden the weld toe.
2. Ultrasonic impact equipment is used as a post-weld treatment equipment. It can simultaneously improve multiple factors that affect the quality of welds, such as stress, defects, weld toe geometry, surface strengthening, etc., so it can improve the fatigue performance of welded joints. With a multiplier effect, the fatigue strength of the treated welded joint can be increased by 50%-120%, and the fatigue life can be extended by 5-100 times.
3. After the treatment with the treatment gun equipment, the traditional grinding and slag removal process is omitted, which can save 20% of labor time, reduce labor intensity, and improve production efficiency.
Scope of application:
Industries that have strict requirements on the stability and strength of the welded joints, such as: bridges, electric power; shipbuilding; pressure vessels, steel structures and other industries for metal welding.
It is widely used in ships, petrochemicals, aviation, railways, wind turbines, pressure vessels, steel or composite bridges, heavy lifting machinery and other fields. It is suitable for post-weld treatment of welded structures of various materials to extend the fatigue life of welded structures and improve The purpose of its fatigue strength, and can eliminate the welding process stress and residual stress, especially suitable for the post-weld treatment of ordinary joints, load-bearing joints and welded joints of dissimilar materials.
Mainly used in the following four aspects:
1) Strengthen the surface of metal parts to improve the surface quality and fatigue life of the parts.
2) Adjust the stress field, reduce welding deformation, and ensure the dimensional stability of the workpiece.
3) Relieve welding stress on the repaired parts of the mechanical parts. Now this method is widely used in foreign machinery manufacturing engineering, especially in welding structure work that has higher requirements on fatigue performance and requires the elimination of residual stress.
4) Improving several factors that affect the fatigue performance of welds, such as residual stress, micro-cracks and defects, weld toe geometry, surface strengthening, etc., is currently a very effective method for improving weld fatigue performance.
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