To ensure the safe and efficient operation of magnetic lifters, the following five-step process must be strictly followed, covering the entire cycle from preparation to completion.
- Equipment Status Check
- A comprehensive inspection of the magnetic lifter is mandatory before use, serving as the foundation for safe operation.
- Appearance Inspection: Confirm there are no cracks or deformations on the lifter body. Ensure the adsorption surface is free of oil, rust, iron filings, or other debris, as these can hinder magnetic force transmission.
- Magnetism Test: Use small ferromagnetic objects (e.g., iron nails) to test the adsorption force. Verify that the magnetic force has no significant attenuation and that the equipment is in normal working condition.
- Selection and Preparation of Lifting Objects
The condition of the object itself directly affects the adsorption effect, so preparation work must be done in advance.
- Confirm Object Properties: Only lift ferromagnetic materials (e.g., iron, steel). Lifting non-magnetic or weakly magnetic materials (e.g., some types of stainless steel) is strictly prohibited.
- Object Surface Preparation: Ensure the object’s surface is flat and clean. If there are protrusions, depressions, or stains, smooth the surface by grinding or wipe it clean first to ensure tight contact with the lifter’s adsorption surface.
- Lifter Fixation and Positioning
Proper fixation is a key step to prevent the object from slipping.
- Locate the Adsorption Position: Precisely attach the lifter’s adsorption surface to the center of gravity area of the object. Avoid deviating from the center of gravity, which could cause uneven stress.
- Verify Adsorption Firmness: Gently push or pull the lifter to check if it is tightly attached to the object without looseness. Proceed to the next step only after confirming the adsorption force is stable.
- Smooth Lifting Operation
The lifting process must be slow and steady to avoid risks from sudden operations.
- Start Lifting: Use lifting equipment (e.g., cranes, overhead traveling cranes) to lift the object slowly. Maintain a low speed during the initial phase and observe if the object tilts or the lifter shifts.
- Process Monitoring: Avoid rapid lifting/lowering or lateral shaking during the process. Monitor the object’s status throughout; if abnormalities occur (e.g., abnormal noise, deviation), stop the operation immediately.
- Object Release and Post-Operation
After safely releasing the object, complete the equipment finishing work.
- Operate the Release Device: Once the object is stably placed at the designated location, deactivate the magnetic adsorption using the lifter’s release mechanism (e.g., lever, button). Ensure hands are kept away from the adsorption surface during operation.
- Equipment Storage: After use, clean the lifter’s adsorption surface and store it in a dry, room-temperature environment. Avoid long-term contact with ferromagnetic objects to prevent magnetic fatigue.
