The reason for the deformation:
1. When the ambient temperature of carbon structural steel is lower than -16°C, and the ambient temperature of low-alloy structural steel is lower than -12°C, cold correction shall not be performed.
2. When heating and correcting carbon structural steel and low-alloy structural steel, the heating temperature should be selected according to the performance of the stainless steel storage tank. Low alloy steel should be cooled slowly after heating and straightening.
3. When the deformation of the component is not large, it can be corrected by cold working and hot working; when the deformation is large and it is difficult to correct, a new part should be replaced for maintenance.
4. The allowable deviation value after steel correction should meet the requirements.
5. The allowable deviation of the overall dimensions of the steel members should meet the requirements.
Approach:
The deformation treatment methods of stainless steel storage tanks described below are useful for most deformations, but may be incompletely corrected for some deformations. The cold working method is to correct the deformation by human or mechanical force, and is suitable for components with small size or small deformation.
1. The steel plate is placed on the platform with the convex side facing upward. The medium and thick plate can be corrected by hitting the convex part with a large hammer. From the outside, from far to near, from heavy to light, hit the surrounding of the convex surface, so that the plate is gradually flattened and slightly hit the convex surface. place.
2. The parts are placed on the platform, and the protruding parts are hammered. The distance between the hitting points should be appropriate.
3. Place the wrinkled parts on the platform, draw grid lines on both ends of the bow, and hammer from the outside to the inside, from heavy to light, and from dense to thin according to the square, and the hammering points should cross in a plum-shaped cross.
4. Place the twisted slats on the platform, use a hammer to hit the edge of the slat outside the support point (lifted edge), and strike from 1 to 2. After the general correction, correct the unevenness on the platform.
5. T-shaped steel and channel steel are bent and deformed, and they are hammered when they are convex. It is necessary to master the distance of the support point, the position of the hammering point and the weight, which is the "sudden rib" of hammering.
