來源：http://www.skyequiltedcards.com 發布時間：2022-10-22 14:18:30
Aluminum processing products bring convenience to people's lives and guarantee economic development. Aluminum coil is one of its main representative products, but we occasionally encounter some problems in our daily use. Then what are the reasons for these problems? The aluminum coil manufacturer will read 7 points for you in detail.
1. Nonmetallic indentation
Definition: Non metallic chips press on the surface of plates and strips. The surface presents long strip shaped obvious spot shaped or yellow black defects. The main reasons are that the rolling process equipment conditions are dirty, the rolling process lubricant is dirty, the injection pressure of the process lubricant is insufficient, and the slab surface has scratches.
2. Slip injury
Definition: scratches caused by relative sliding or dislocation between edges and surfaces or between surfaces
Main reason: In the process of processing and production, when the strip contacts with the guide rail and equipment, it will produce relative friction and scratches. The end faces of cold rolled coils are not aligned, and shaft furnace annealing and overturning cause dislocation and interlayer interference. Intermittent scratches, improper tension during cold rolling and dislocation between layers during annealing will all cause scratches. Improper finishing approval or paving operations can cause slippage and scratches between plates.
Definition: After the aluminum coil or aluminum coil collides with another object, the surface or end face of the plate or strip is scratched, and most of the metal protrudes from the edge of the groove.
Main reasons: during handling or storage, plates or coils collide with other objects, and plates or coils collide with other objects in the annealing rack or chassis.
4. Warping angle
Definition: The edge of strip steel is lifted after rolling or shearing.
Main reasons: excessive reduction during rolling, uneven distribution of lubricant during rolling, improper adjustment of cutting edge during shearing.
5. Kink wound
Definition: deformation folding after bending sheet. Main reasons: the feeding of the multi roll straightener is not correct, and the sheet is overturned and folded. The force is unbalanced when stacking paper.
6. Collapse roll
Definition: The winding core is seriously deformed and the winding shape is not round. Main reasons: insufficient tension, external pressure, low iron core strength, no iron core coil annealing during crimping.
Definition: The end surface of strip steel is uneven due to the irregular movement between layers and end layers. The main reasons are uneven billet, improper tension control of rolling mill unwinding and coiling, uneven reduction and sleeve movement, improper adjustment of leveling roll, abnormal centering system during coiling, poor flatness of roll system, etc.
The above is an analysis of the common quality problems of aluminum coils, reminding the user to observe whether the aluminum coils have the above problems when purchasing. If found, please contact the relevant personnel to replace them immediately. Follow us http://www.skyequiltedcards.com , learn more about it!