During the lifting of steel plates with electro-permanent magnetic lifting tools, surface damage to steel plates is an issue requiring close attention and resolution.

To reduce steel plate surface damage, first ensure that the pole surfaces of the electro-permanent magnetic lifting tool are smooth and flat. If the pole surfaces have bulges, depressions or sharp edges, they tend to scratch the steel plate surface during lifting. Therefore, regular inspection and maintenance of the flatness of pole surfaces are essential.

Secondly, reasonably adjusting the magnetic force of the electro-permanent magnetic lifting tool is also critical. Excessive magnetic force may cause strong impact during adsorption and release, resulting in surface damage; insufficient magnetic force may fail to hold the steel plate firmly and raise lifting risks. Thus, the magnetic force should be precisely adjusted according to factors such as the material, thickness and weight of the steel plate.

Maintain steady and uniform movement during lifting. Sudden starts, sudden stops or violent shaking will increase friction and collision between the steel plate and the lifting tool and lead to surface damage. Operators shall receive rigorous training and master lifting skills and rhythm proficiently.

In addition, a layer of soft protective material such as rubber pads or nylon cloth can be attached to the pole surfaces of the electro-permanent magnetic lifting tool. This can mitigate direct contact and friction between the lifting tool and steel plates to a certain extent and lower the risk of surface damage.

Finally, for steel plates with high surface quality requirements, proper surface protection treatment such as applying anti-rust oil or covering protective films can be carried out before lifting.

In summary, measures including maintenance of electro-permanent magnetic lifting tools, magnetic force adjustment, standardized operation and additional protection can effectively solve the problem of steel plate surface damage and preserve the quality and appearance of steel plates.