Vibration aging

The United States, Britain and other countries also use vibration aging in other industrial sectors, such as paper-making stainless steel "target=_blank> stainless steel welding manufacturing, can not heat aging treatment, using vibration aging, that is, preventing deformation, and improving corrosion resistance. In the case of the situation, the vibration aging process has been widely applied and the scope is expanding.
Frequently asked questions about vibration aging processes

Because some users do not understand the mechanism of vibration aging, blindly use some simple (so-called "automatic vibration aging") vibration aging equipment to aging the product. This method, which is completely independent of the individuality of the workpiece and only preset according to the parameters of the manufacturer of the vibration aging equipment, adopts one or several process parameters for aging of various workpieces, which may cause the following conditions to occur in the aging workpiece:

2.1. False aging: the workpiece does not resonate or the amplitude is small or the amplitude is large, but the workpiece as a whole is rigid or vibrating. The “automatic vibration aging equipment” can also print or output various aging parameters and curves according to preset programs. Misleading the operator and the craftsman to judge that the workpiece does not achieve the effect of aging at all;

2.2. False aging: Although the workpiece generates resonance, the vibration mode that occurs is inconsistent with the vibration mode required by the workpiece. The dynamic stress is not added to the part where the workpiece needs to be stressed. This does not make the workpiece achieve the intended aging effect and affect the aging effect.

2.3. Over-aging: Since the reasonable aging parameters are not used for the individuality of the workpiece, the parameters are immersed completely according to the parameters of the blind preset. The resonance may be too strong or the amplitude is too large, resulting in defects inside the workpiece (cracks, slag inclusions, pores). , shrinkage, etc.) continue to expand, tear, and even the serious consequences of retirement.

3. Process analysis of vibration aging: It can be seen from the current situation of the vibration aging process that the aging treatment of the workpiece with the blind automatic vibration aging process is pseudo-scientific, which not only fails to achieve the purpose of the workpiece, but also appears Serious consequences, resulting in cracking of the workpiece, and even the destruction of the machine. So, what kind of vibration aging process is scientific?

First of all, the residual stress distribution of the workpiece, the accuracy of the shape and position, and the future working load and the possible failure reasons should be analyzed before the aging, and a reasonable vibration aging process should be established to determine the aging route and the key aging parts.

3.1. Shape and position accuracy analysis: According to the straightness, cylindricity, flatness, coaxiality, symmetry of the workpiece, etc., different excitation forces should be adopted, and different vibration modes should be selected.

3.2. Resonance frequency analysis: Select different support methods according to workpiece strength, rigidity, batch size or use vibration platform for processing.

3.3. Vibration mode analysis: different frequencies correspond to different vibration modes, and different vibration modes correspond to different dynamic stress fields.

3.4. Working load: For the future working deformation of the workpiece, it is important to eliminate the residual stress of the workpiece load in the working condition state, and select the corresponding vibration mode for aging treatment.

3.5. Failure analysis of working conditions: According to the problems that may arise in the future, different time for different excitation force should be used for aging treatment. Secondly, the vibration aging equipment should be scientifically selected according to the time-dependent workpiece. Some simple, so-called “automatic vibration aging equipment” should not be selected; instead, the vibration aging mechanism should be deeply understood, and such vibration aging equipment should be selected by comparison: a) stable operation, closed-loop speed control, reliable speed, online printing, High cost performance: b) Strong and weak electrical isolation, strong self-protection function, low failure rate, easy maintenance: c) easy to operate, human-machine dialogue, and the ability to set device operating parameters through the panel input password without changing the hardware settings: d) No matter which operating mode (manual, semi-automatic, fully automatic, programming) is used, multi-peak automatic identification, multi-vibration aging can be realized, and partial scanning and partial printing can be realized; and the manual personality can be adopted for the personality of the workpiece. (According to the operator's experience and willingness to complete the pre-vibration scan, print, identification, aging, post-vibration scan), complete the vibration aging of the useful peaks, avoid processing the useless peaks, and also find a large number of process parameters by super manual. Scientific analysis to find commonality of the same parts, quickly and easily on the panel The program is stored and stored so that the automatic processing of the workpiece can be called at any time in the future; e) Remote operation: For large parts, the operator can remotely control the equipment and adjust the operating parameters while touching the workpiece. The whole process of aging; at the same time, it can keep the operator away from noise and protect the operator.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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