The permanent magnetic lifter is a kind of magnetic lifting equipment that does not require electricity. It is small and portable and has powerful magnetic attraction. It is widely used in the handling of magnetic materials such as steel plates and iron blocks. Let's take a look at the principle of permanent magnetic lifter.
What is a permanent magnetic lifter?
A permanent magnetic lifter, also known as a permanent magnetic suction disc, is made using Faraday's electromagnetic induction principle. It uses high-performance permanent magnetic material neodymium boron sand inside to generate strong suction force in the magnetic circuit. The operator can flip the handle or the permanent magnet lifter can change the magnetic field by its own up and down movement to put the permanent magnetic lifter in a working or off state. There is no need for an external power supply during the entire lifting process, which saves energy and reduces emissions.
Application defects of permanent magnetic lifter
First of all, the permanent magnetic lifter is prone to the risk of workpiece detachment during lifting. Because the suction area of the permanent magnetic lifter is small, and it is difficult to perform multi-unit lifting, so when a single permanent magnetic lifter is used to lift a long and thick steel plate, the part that does not come into contact with the working surface of the permanent magnetic lifter will sag. When it sags to a certain degree, the workpiece is easily detached, which makes it impossible to lift smoothly, and even causes lifting accidents.
Secondly, the permanent magnet lifter is prone to failures and serious equipment damage. Since the internal parts of a permanent magnetic lifter are moving parts (such as flipping the handle during operation), the moving parts are inevitably prone to failures after long-term use, which affects the efficiency of workshop workpiece loading and unloading.
Moreover, the magnetic switch of the permanent magnetic lifter needs to be flipped manually. Therefore, compared with the remote control switch of the electric permanent magnetic lifter, it is not intelligent and it also takes time to flip manually.
Finally, the magnetic force of the permanent magnet lifter is difficult to adjust, and the compatibility of lifting is relatively poor. If there are steel plates with significantly different lengths and weights in the workshop, the permanent magnetic lifter cannot complete the handling tasks, while the electric permanent magnetic lifter can be designed as a telescopic beam electric permanent magnet lifter, which can solve the problem of steel plates with significantly different weights.
Every product has advantages and disadvantages, and the permanent magnetic lifter is no exception. The above is the principle and defect analysis of the permanent magnetic lifter, which is also one of the reasons why many mechanical manufacturers choose electric permanent magnetic lifters to replace permanent magnetic lifters.