The yoke is one of the parts on the electromagnet. The armature of the general electromagnetic servo mechanism (including the relay), that is, the moving iron core attracted by the electromagnet, is located in the center of the coil, which cannot make full use of the magnetic energy of the electromagnetic coil. When the yoke (that is, a static iron core) is added, the yoke It forms a closed magnetic circuit with the armature, which seals the magnetic lines of force generated by the electromagnetic coil inside, so that the magnetic energy is fully utilized, and the efficiency of the electromagnet is maximized.
The yoke parts are made of thin materials, small dimensions and high precision requirements. After comprehensively considering the process plan of the parts processing, the production batch and other issues, it is determined to use the punching and blanking compound die plus the bending process, and the mold base and other parts are selected from the country standard. Strive to achieve streamlined mold structure, low process cost and reliable implementation to meet production needs.Design the composite mold of the part, the part is the yoke of the electromagnetic relay, the material is DT4E pure iron plate, the thickness is 2.00 mm or as customers' requires.
The characteristics of electrical pure iron:
1-Good electromagnetic performance: low coercivity, high permeability, high saturation magnetic induction, stable magnetism and non-magnetic aging.
2-The smelting process of electromagnetic pure iron series adopts hot metal pretreatment, RH refining, electromagnetic stirring and other processes. The interior is dense and uniform, with low gas content and low carbon content in the finished product.
3-Good cold and hot processing performance:Electrician Pure Iron cold processing can meet the process requirements of turning, piers, punching, bending, drawing, etc., hot processing, such as re-forging and re-rolling, the sensitivity of red brittleness is small, and it can be guaranteed in a larger temperature range Processing within.
4-Good surface quality: good welding and electroplating performance.
5-High dimensional accuracy: ultra-precision cold-rolled plates can be provided, such as thick plates ≤1.5mm, and the thickness tolerance can be guaranteed ≤±0.01mm.
Reduce the coercive force or stress of electrical pure iron through high temperature annealing
Why is the coercivity value of pure iron Cold rolled steel material increased a lot after processing the finished product. The product use effect is not ideal. Is there something wrong with the material, or is there something hidden? For this reason, our company specially organizes the following information, hoping to solve problems for our friends.
①Why should pure iron be annealed?
Answer: Because cold working causes many crystal defects (dislocations, stacking faults, etc.) in pure iron, and causes internal stress, increases the difficulty of magnetic domain wall movement, increases Hc, and decreases μm value. In order to eliminate these adverse effects, electrical pure iron must be subjected to stress relief annealing or recrystallization annealing.
②What are the improvements to pure iron Cold rolled steel after annealing?
Answer: The high annealing temperature makes the crystal grains coarser and eliminates the stress of the pure iron material, which is beneficial to the magnetic permeability. Therefore, the stress-relief annealing generally adopts the highest temperature that does not cause α←→γ phase transition to avoid phase transition during cooling. Grain refinement.
③The annealing temperature and time of Electrician Pure Iron?
Answer: Yaoqiang pure iron usually adopts the recrystallization annealing process system to eliminate the cold working stress: install the furnace below 600℃, raise the temperature to 800℃ with the furnace, and then slowly heat to 830～890℃, keep the temperature for 4h, and then the temperature is no more than The cooling rate of 50℃/h is cooled to 700℃, and finally cooled to below 500℃ with the furnace. The entire annealing is performed in hydrogen or vacuum.
Contact Information:
Mr.Terry Young (Sales Manager)
Apollo Electronic Components (Xiamen) Co.,Ltd
Xiamen Apollo Stamping Welding Technology Co., Ltd
Add:225#,Jinshang Road,Huli District,Xiamen City,Fujian Province,China,361009
Tel&Fax: 0592-5765084, Mob/WhatsApp/WeChat: 0086-13859903038 ,QQ: 1260358661
Email: yfd@china-electronic-components.com
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Since 1990,professional in Silver Contact Rivet&Core&Screw Terminal for Relay&Switch&Contactor ect Stamping&Welding solutions !