Terminal block is a common basic accessory product in automation industry. It mainly completes the effective transmission of signal, current and other intermediate media. Safety protection device and light operation are the two core values of terminal facing the connection market.
In the power automation connection system, the appearance of terminal blocks facilitates the daily operation and maintenance. With simple structure and rich types, it can provide thousands of solutions for industry partners. When the terminal in connection is short circuited due to burning out, the application advantage of the terminal is immediately displayed. After power failure, the burned terminal can be taken out immediately to replace the new product of the same model, and the whole maintenance time is greatly shortened. As the terminal itself, it mainly includes the following aspects of connection technology: < br > and 1. Screw connection < br > 0 Screw connection is the connection mode of screw type terminal block. Lianjie electric reminds you to pay attention to the maximum and minimum cross-section of the allowable connecting wire and the maximum tightening torque of screws of different specifications.
2. Welding < br > Soldering is common in soldering. The most important thing of solder joint is to form metal continuity between solder and the surface to be welded. Therefore, solderability is very important for cold pressed terminals, all rights reserved by control engineering China. Tin alloy, silver and gold are the most common coatings on the welding end of ring terminals. The common welding ends of reed contact are welding plate, punching welding plate and notch welding plate; the common welding end of pin hole contact is drilling arc notch type.
3. Crimping < br > Crimping is a technique to compress and displace metals within a specified limit and to connect conductors to contact pairs. Good crimping connection can produce mutual melting flow of metal, which makes the conductor and contact deform symmetrically to the material. This kind of connection is similar to cold welding connection, which can obtain better mechanical strength and electrical continuity, and can withstand worse environmental conditions. At present, it is generally believed that proper crimping is better than tin soldering, especially in the case of high current. Special crimping clamp or automatic and semi-automatic crimping machine shall be used for crimping. According to the copyright of Control Engineering China of cold pressed terminal www.cechina.cn Correct selection of conductor barrel for contact pair. It should be noted that the crimp connection is permanent and can only be used once.
4. Wound connection < br > is an effective way to solve the problem Wire wrapping is to wrap the wire directly on the contact winding column with edges and corners. During winding, the conductor is wound under the control of tension, pressed into and fixed at the edge and corner of the contact winding column to form air tight contact. There are several requirements for wire wrapping: the nominal value of conductor diameter shall be within 0.25 mm ~ 1.0 mm; when the diameter of conductor is not greater than 0.5 mm, the copyright of engineering network shall be controlled, and the elongation of conductor material shall not be less than 15%; when the diameter of conductor is greater than 0.5 mm, the copyright of engineering network shall be controlled, and the elongation of conductor material shall not be less than 20%. The tools for winding include winding gun and fixed winding machine.
5. Puncturing and connecting < br > was performed Puncture connection, also known as insulation displacement connection, is a new end technology invented by the United States in the 1960s. It has the characteristics of high reliability, low cost and easy to use. At present, it has been widely used in various wiring terminals for printed circuit boards, cold pressed terminals, control engineering China Copyright, cold pressed terminals, ring terminals. It is suitable for the connection of ribbon cable. It is not necessary to peel off the insulation layer of the cable during connection. The tip of the U-shaped contact spring of the terminal block is inserted into the insulation layer, so that the conductor of the cable slides into the slot of the contact spring and is clamped. All rights reserved by control engineering network, so as to form a close electrical connection between the cable conductor and the terminal spring. It only needs simple tools, but it has to choose a gauge定线规的电缆。