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Do you know the reason why stainless steel pipe processing is prone to corrugation?

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Do you know the reason why stainless steel pipe processing is prone to corrugation?

作者: Release Date: 2019-08-20 Author: Click:

Why is stainless steel pipe processing prone to ripples? Not much to say, I believe many friends can't wait.

In fact, the main reason for the stainless steel pipe ripples is caused by the vibration of the grinding machine, steel pipe, and grinding wheel system, or the vibration of the grinding wheel relative to the workpiece. This vibration includes forced vibration and self-excited vibration. There are many specific reasons for the vibration. The main ones are: the grinding wheel is unbalanced, and the balance test has not been carried out carefully before installation. Therefore, forced vibration is generated during the grinding process, causing a straight wave ripple on the surface of the stainless steel pipe. Because the frequency of forced vibration is equal to the frequency of the exciting force or a multiple of it, the resulting ripple is deeper and the wave distance is wider. The frequency of the wave is related to the speed of the grinding wheel. When processing stainless steel pipes, the identification method can apply a thin layer of red oil on the surface of the workpiece, and adjust the moving speed of the table to make the table's moving distance slightly equal to 2/3 of the width of the grinding wheel when the workpiece rotates once. Then, move the wheel holder so that the wheel just touches the red oil (there is no cut-in), and the tool is quickly retracted after one vertical pass. At this time, traces of "polygons" can be observed on the surface of the workpiece, and the wave distance (that is, the side width of the polygon) is measured, and the frequency (wave frequency) of the wave is calculated. The identification method for surface grinding is similar.

The imbalance of the drive motor of the grinding wheel can also cause forced vibration to cause a straight wave (when grinding the outer circle) or a horizontal wave (when grinding the plane). The situation is similar to the imbalance of the wheel. For the same reason, similar forced vibration may also occur in the thickness and thickness of the transmission belt of the grinding wheel, and the pulsation of the liquid in the oil pipeline caused by the oil pump operation in the hydraulic transmission mechanism of the grinder. However, the vibration caused by it is slightly slighter. When the surface of stainless steel pipe is processed, the elastic deformation of the steel pipe and the machine tool system during the grinding process will increase the intensity of self-excited vibration during the grinding process, which will cause a straight wave ripple on the surface of the steel pipe. At this time, the ripple is shallow and dense, and the wave frequency is generally about 300 per second, which is not consistent with the speed of the grinding wheel. The worse the rigidity of the steel pipe and the machine tool system, the greater the friction between the grinding wheel and the workpiece, the greater the amplitude of the self-excited vibration, and the deeper the ripple.

What is the forming method of stainless steel processing? 1. Single-radius forming method: It also has three types of circumferential zigzag forming method, marginal zigzag forming method and center zigzag forming method. In the method of forming a stainless steel welded pipe, the strip steel passes through the middle of the horizontal roller and the vertical roller, and then the flat plate is bent into a round pipe.

2. Circular zigzag forming method: stainless steel processing is zigzag deformed in the width direction, and the zigzag radius of each frame is gradually reduced until the steel strip is closed and closed.

3. Double-radius forming method: It uses two or more fundamental deformation methods for combined deformation. Among them, the marginal forming method and the circumferential forming method are commonly used for comparison.

4. Roll forming method: Stainless steel processing is performed by small rolls installed in a cage structure, which is mainly composed of pre-bending rolls, row roll equipment and finishing rolls, etc., and is suitable for forming thin-walled steel pipes.

5, stainless steel processing spiral welded pipe pendulum forming method: divided into spiral stainless steel processing before the pendulum forming and spiral stainless steel processing after pendulum forming these two types, the main difference is whether the unit is equipped with a looper.

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URL of this article: http://shcidu.com/news/467.html

Key words: stainless steel instead of copper , stainless steel pipe fittings , SUSCU silencer

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