In the beginning of the 21st century, a new vibration aging technology appeared in China. She abandoned the original vibration aging technology research direction, and created a new way to interpret the value of vibration aging. Breaking through the original technical bottleneck, it ushered in a new era of vibration effects.
Because of its unique frequency-finding method and processing frequency, it is called spectrum harmonic technology. The spectrum harmonic technology no longer uses the original frequency sweeping method, but uses the Fourier method to analyze the workpiece to find dozens of harmonic frequencies of the workpiece. Among these dozens of harmonic frequencies, it is preferable to eliminate the residual of the workpiece. The harmonic frequency of the five different modes with the best stress effect is aging, and the multi-dimensional stress relief is achieved to improve the dimensional accuracy and stability.
The spectrum harmonic method can find the harmonic peaks of five different modes regardless of the workpiece size, frequency rigidity and material properties. It is not limited by the speed range of the exciter. It has no special requirements for the excitation point and the pick-up point. It can handle high-rigidity and high-frequency-frequency workpieces that cannot be processed by sub-resonance. It can meet the requirements for workpieces with high dimensional accuracy and low vibration noise. The coverage in the machinery industry has reached 100%. The processing speed is all below 6000 RPM, which also solves the problem of high noise of the sub-resonant equipment.
Comparison of two technical functions
category   | Spectrum harmonic technique | Subresonance technology |
the way | Spectrum | Subresonance |
Frequency finding method | Spectrum analysis | scanning |
Frequency search time | 50 seconds | 5-12 points (1000 to 10000 rpm) |
Whether to scan before shaking | no | Yes |
Whether to scan after vibration | no | Yes |
Effective mode | Five modes | Little or no |
Process development method | automatic | Artificial |
Excitation point, support point, sensor position | No special requirements | Strict requirements |
noise | Very small | Big |
High rigidity, high natural frequency workpiece | Can handle | Can not |
Meet the technical requirements of the workpiece | Extremely high | Lower |
cover area | 100% | twenty three% |
Suitable for | Structures with complex workpieces, workpieces with high rigidity and high natural frequency sub-resonance that cannot be processed, workpieces with high precision and safety requirements | Workpieces with simple structure, low rigidity, low natural frequency and low precision requirements |
The patent inventor of this new technology is Beijing Xiangbo Technology Co., Ltd. The “Leader Elimination Stress Expert System†using spectrum harmonic technology has taken the lead in the high-tech industries such as China’s aviation, aerospace and weapons. Fully applied, solved the problems that have been plagued by these industries for many years, and was included in the formal process stereotypes. However, because of the high price of such products, coupled with the shadow of the original vibration aging in many enterprises, the vast number of civil machinery manufacturers have not been widely accepted. However, the emergence of new technologies has solved the technical problems of decades, and the replacement of thermal aging by vibration aging has gradually become a reality.
The effect table of the customer application part of the pilot's stress relief expert system
factory | Workpiece | Before and after the use of "Pilots" |
Beijing Satellite Manufacturing plant | 1 , aluminum alloy beam  Length × width × height = 200 × 12 × 2 , aluminum plate Length × width × height = 30 × 15 × 3 , aluminum alloy basin (basin shape)  High= | 1. Front: the ends are sharp after finishing, the error 2 , before: deformation after hot aging finishing 3 , before: vertical error is large, up to |
Inner Mongolia One machine group | Seat and body | Front: The seat has a large deformation, which affects the machining accuracy. After: the finishing deformation of the rear axle of the car body is reduced by 60 %, the pass rate is 94. %, and the circle roundness is 100 %, completely replacing the original tempering process. |
Aerospace State-run Fenghua Machine Factory | Magnesium alloy casting | Front: Deformation after original heat aging finishing |
Beijing Institute of Aeronautical Materials Technology | High-strength aluminum alloy end caps and baffles | Front: the passing rate after the original artificial aging machining 40-50%, after: batch processing more than 50,000, after machining pass rate above 95%. |
Beiren shares | Main workpiece of the printing press | Before: The original heat aging cost was 1.859 million yuan / year. After: vibration aging cost of 825,000 yuan / year |
Tianjin Sanda Foundry Co., Ltd. | Machine bed | Before: the original heat aging cost more than 2 million yuan / year After: the cost after using vibration aging is greatly reduced, and the cost of roughly calculating the power consumption is only a few thousand yuan for the whole year. |
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