Terminals Five conventional connection technologies
- Oct 31, 2017 -

Terminal blocks are common accessories based on automation products industry, its main transmission signal, effective working current intermediary, safety protective device and portable operation are the two core value terminal connection oriented market.

In the electric power automation connection system, the wiring terminal is convenient for daily operation and maintenance. Its structure is simple, the type is rich, and it can provide thousands of solutions for the industry partners. When the terminal of the connection is short circuited due to burnout, the application advantage of the terminal is obvious. After the power is cut off, the burned terminal can be removed immediately to replace the same type of new product, and the whole maintenance time is greatly shortened. As the terminal itself, it mainly includes the following aspects of connection technology:

1. Screw connection

Screw connections are connected by screw type terminals, and Czech electric reminds you to allow for maximum and minimum cross sections of connecting wires and the maximum tightening torque allowed by different specifications of screws.

2, welding

Welding is the most common soldering. Soldering solder connection is most important is the surface material and are welded to be formed between the metal continuity. Therefore, the wiring terminal CONTROL ENGINEERING China copyright, cold pressing terminal, it is important solderability.  Tin alloy, silver and gold are the most common coatings on the welded ends of the connecting ring terminals. The common welding ends of reed contact are welding plate, eye punching welding piece and gap welding plate. Pinhole contact is common, and there is arc hole notch in common welding end.

3, crimping

Crimping is a technique for compressing and shifting metal within specified limits and connecting wires to contact pairs.  Good crimp connection can produce molten metal flow, so that the wire and contact deformation of the material symmetry. This connection is similar to cold welding connection, can get better mechanical strength and electrical continuity, it can withstand more severe environmental conditions. It is generally believed that the proper pressure connection than soldering is good, especially in the high current situations must use crimp. Press clamp or automatic and semi-automatic press splicer must be used for crimping. According to the cold pressing terminal CONTROL ENGINEERING China copyright, the cold pressing end lead cross section, correctly select the contact pair of the lead cylinder. It should be noted that the crimp connection is permanent and can only be used once.

4, winding

Winding is the direct winding of the conductor around the contact piece with edges and corners. During winding, the conductor is wrapped under the control of tension, pressed and fixed at the corners of the contact piece around the cylinder so as to form an airtight contact. There are several requirements: around the wire diameter of wire nominal value should be in the range of 0.25mm~1.0mm; the wire diameter of not more than 0.5mm control works copyright, extending conductor material rate not less than 15%; control engineering copyright wire diameter is greater than 0.5mm, extending conductor material ratio of not less than 20%. The winding tools include round gun and fixed winding machine.

5, pierce the succession

Pierce also called insulation displacement connection connection, by the United States in 60s invented a novel end technology, has the advantages of high reliability, low cost, easy to use, has been widely used in various printed circuit board wiring terminal, cold terminal CONTROL ENGINEERING China copyright, cold end, ring terminal. It is suitable for the connection of ribbon cables. The insulation layer connection does not need to strip the cable, depending on the terminal "U" shaped contact spring tip piercing the insulation layer, the cable conductor slide contact spring is clamped in the groove and control engineering copyright, so as to form electrical connection between the conductor and terminal reed. It only needs simple tool, but must use the provisions of wire cable.