As is well known, there are inevitably some quality problems in the production process of any product, some caused by machinery, and some influenced by human operation; Aluminum plates are no exception. In the production process of aluminum plates and strips, quality problems are prone to occur due to equipment or personnel operation errors. Today, the editor will take you to understand what common problems are in the production process?
In the process of rolling various semi-finished and finished aluminum plates with billets, as well as in the production processes of coil finishing, annealing, transportation, packaging, etc., some defects are inevitable. The generation of these defects is partly due to the defects of the ingot and the cast rolling strip itself. Sometimes it can be exposed during the ingot casting and rolling process, but sometimes it cannot be detected, and it can only be exposed during subsequent processing; The other part is generated during the production process of foil rolling, finishing, annealing, transportation, packaging, and other processes. The majority of these defects are caused by equipment malfunctions, violations of operating procedures, improper adjustment of process parameters, inadequate technical proficiency of operators, and various other reasons. In the production process of aluminum foil, there are many types of quality defects caused by aluminum sheets, mainly a large number of pinholes, thickness deviation, poor flatness, and various reasons for strip breakage. Reducing these defects is meaningful for improving the quality of foil materials. The inclusions, air passages, metal and non-metal pressure, friction, scratches, and uneven thickness in casting and hot rolling billets can all cause great difficulties in aluminum foil rolling, leading to strip breakage, pinholes, and thickness deviation.
Scratches: Scratches, abrasions, and bumps are intermittent or continuous grooves on the surface of aluminum plates. It is generally generated when sharp objects come into contact with the surface of the foil and slide relative to each other. The main cause of occurrence is that there are pointed defects or hard debris adhering to the surface of the rolling and guide rollers; The mechanical guide rollers and guides for cutting, winding, and slitting have pointed defects or debris. Scratches: Bundles (or groups) of distributed scars on the surface of box materials caused by relative sliding or displacement between edges or surfaces of objects, or after contact between surfaces. The main cause of scratches: During the processing and production process of aluminum plates, relative friction occurs when they come into contact with the guide and equipment, resulting in scratches; Loose coils, layers, or bird's nest shaped end defects in the raw material; Improper use of tension during rolling can result in interlayer misalignment and scratches during uncoiling. Collision: The scratches on the surface or end face of the aluminum coil after colliding with other objects. It manifests as a partial depression on the surface or end face. The main cause of collision: improper lifting or storage in various production processes; Collisions during transportation and handling; The aluminum foil roll is scratched by other protrusions on the annealing rack or packaging table.
以上就是鋁板生產(chǎn)過(guò)程中常見的問(wèn)題介紹。
The above is an introduction to common problems in the aluminum plate production process.
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