When we were repairing the transformer. After opening the lid, it is found that the windings immersed in the oil are trapped on iron cores stacked by many silicon steel sheets. What is the reason? To answer this question, we must first talk about the basic principles of transformers. The transformer is based on the principle of electromagnetic induction. There is no magnetic connection between the primary and secondary windings of the Han winding or three winding transformer. If the transformer does not have a core, theoretically there is also a transformer effect, but because of the large magnetic reluctance of air. Magnetic leakage is very serious, so it needs a large excitation current to climb the transformer with a core. The magnetic resistance of the dry core is small. When the core is passed through, a strong magnetic field can be obtained, thereby enhancing the power of the primary and secondary windings. Magnetic induction also reduces the excitation current accordingly. If the transformer is not equipped with a core, it is not acceptable that the transformer is not equipped with a core because the magnetic flux leakage current is large.
Zinc Alloy Die Casting have a good surface roughness, strength and elongation, Which are widely used in a variety of ornaments, such as furniture, accessories, door handle,architectural decoration, bathroom accessories, lighting parts, toys, tie clips, belt buckles, various metal buckle and so on,they are required a good surface treatment performance. The traditional zinc alloy die-casting material are Zamak 2,3,5,7 , the Zamk 3 is the most widely used in different industries
Zamak 3: good fluidity and mechanical properties. Used in casting of low mechanical strength, such as toys, lamps, decorations, some electrical parts.
Zamak 5: good mobility and good mechanical properties. Applied to certain requirements of the mechanical strength of castings, such as auto parts, electrical and mechanical parts, mechanical parts, electrical components.
Zamak 2: there are special requirements for mechanical properties, hardness, wear resistance, dimensional accuracy requirements of the mechanical parts
.ZA8: good flowability and dimensional stability, but less liquid. Used in die casting, small size, accuracy and mechanical strength demanding workpieces, such as electrical appliances. Superloy: the best mobility, applied to the die-casting thin-walled, large-size, high precision, complex shape of the workpiece, such as electrical components of the box.
Different zinc alloys have different physical and mechanical properties, such as die casting design provides room for choice. The same time, the choice of the zinc alloy is more important to select what kind of zinc alloy, mainly from three aspects to consider
1. Die-casting their own purposes, need to meet the performance requirements. (1) mechanical properties, tensile strength, when the material fracture resistance; Elongation, brittleness and plasticity of the measure;Hardness is the resistance of the material surface is pressed into a hard object or friction caused by plastic deformation. (2) state of the working environment: temperature, humidity, media contact with the workpiece and air tightness requirements. (3) precision: accuracy and dimensional stability can be achieved.
2. process performance: (1) casting process; (2) mechanical processes; (3) surface treatment.
3. Economic good: the cost of raw materials and production equipment requirements (including smelting equipment, die casting machine, mold, etc.), as well as production costs.
Zinc Casting, Zinc Alloy Die Castings, Zinc Pressure Die Casting, Zinc Die Casting Products
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