Which has a greater attraction, the lifting electromagnet or the magnet?
2021-11-09
Abstract
1. Which has a greater attraction, the lifting electromagnet or the magnet?
Before answering this question, it is important to understand that the attraction of both the electromagnet and the magnet is related to magnetic flux, regardless of how the magnetic flux is generated. Whether it is a lifting electromagnet or a permanent magnet, the one with greater magnetic flux will have greater attraction.
First, let's understand the working principle of the lifting electromagnet. When the iron core is inserted into the energized solenoid, the iron core is magnetized by the magnetic field of the energized solenoid. The magnetized iron core also becomes a magnet, greatly enhancing the magnetism of the solenoid due to the superposition of the two magnetic fields. To make the electromagnet more magnetic, the iron core is usually made in a horseshoe shape. However, it is important to note that the winding direction of the coils on the horseshoe-shaped iron core is opposite; one side is clockwise, and the other side is counterclockwise. If the winding directions are the same, the magnetization effect of the two coils on the iron core will cancel each other out, and the iron core will not exhibit magnetism. Additionally, the iron core of the electromagnet is made of soft iron, not steel. Otherwise, once steel is magnetized, it will retain its magnetism for a long time and cannot be demagnetized, making it impossible to control the strength of its magnetism through current, thus losing the advantages of the lifting electromagnet.
Therefore, the magnetic force of a magnet is a fixed value, while the magnetic strength of a lifting electromagnet can vary with the current. Both have their advantages and applications.
2. The importance of diversification in the production of suction cup lifting electromagnets
Suction cups are divided into rectangular suction cup electromagnets, circular suction cup electromagnets, square suction cup electromagnets, etc. The Applications of suction cups are very wide, especially in the machine tool processing industry. There are also some industrial suction cups, such as lifting suction cups, which can be used in foundries, large steel mills, and other workpieces that are difficult to grasp with machinery. They play an indispensable role as mechanical operating tools during handling, such as lifting electromagnet suction cups, which are further divided into grinding machine-specific suction cups, milling machine-specific suction cups, etc. These suction cups can be used as worktables for machining.
There are many types of suction cups, and currently, the most widely used in the market are jacks, also known as suction cup electromagnet jacks, etc. The manufacturing process of suction cups is very complex. Suction cups of different Specifications have different adhesion forces, with an average adhesion force of 10 to 12 kilograms per square centimeter. The premise is that the adhesion surface must match the suction cup's adhesion surface; otherwise, the working efficiency of the suction cup electromagnet will be greatly reduced, and the adhesion force of the suction cup will also decrease.
An important aspect of suction cup lifting electromagnets is the research and improvement of safety service conditions, such as enhancing the leakage and waterproof performance of suction cup electromagnets. After strengthening the waterproof function of the suction cup electromagnet based on the original design, it can be submerged in water for up to several months without losing a drop of water. After successful testing, mass production will be initiated.
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