Termination refers to the way the connector is connected to the wire or cable. Proper selection of termination methods and proper use of termination technology is an important aspect of using and selecting connectors. There are several common connection methods:
1, welding. The most common type of soldering is soldering. The most important thing for a solder connection is that metal continuity should form between the solder and the surface being soldered. So for connectors, solderability is important. The most common coatings on the solder end of connectors are tin alloys, silver, and gold. The reed-type contact pair has common soldering end types such as the solder-pin type, punch-hole solder type and notch solder-type: pinhole contact has common drilling ends with drilled arc notches.
2, crimping. Crimping is a technique for compressing and displacing metal within specified limits and connecting wires to contact pairs. A good crimp connection can produce a mutual melt flow of the metal, which causes the wire and the contact to deform symmetrically to the material. This connection is similar to a cold-welded connection, it can get better mechanical strength and electrical continuity, and it can withstand more severe environmental conditions. At present, it is generally believed that the correct crimp connection is better than soldering, especially in high current applications, crimping must be used. When crimping, special crimping pliers or automatic or semi-automatic crimping machines must be used. According to the cross section of the wire, the correct pair of wire barrels should be selected. Note that the crimp connection is a permanent connection and can only be used once.
3, wrap around. Wrapping is the direct winding of the wire on the angular contact piece winding post. During the winding, the wire is wound under a controlled tension, and is pressed into and fixed at the corners of the contact-wrapping column to form an air-tight contact. There are several requirements for winding wires: the nominal value of the wire diameter should be in the range of 0.25mm to 1.0mm; when the wire diameter is not greater than 0.5mm, the elongation of the conductor material is not less than 15%; when the wire diameter is greater than 0.5mm, the conductor The elongation of the material is not less than 20%. Winding tools include wind guns and stationary winders.
4, puncture one after another. Pierced connection, also known as insulation displacement connection, is a novel termination technology invented by the United States in the 1960s. It has the characteristics of high reliability, low cost, and easy use. It has been widely used in various printed board connectors. in. It is suitable for the connection of ribbon cables. It is not necessary to peel off the insulation layer of the cable during the connection. The tip of the U-shaped contact spring of the connector penetrates into the insulation layer, so that the conductor of the cable slides into the groove of the contact spring and is clamped. A tight electrical connection is formed between the cable conductor and the connector spring. It only requires simple tools, but must use cables with specified wire gauges.
5, screw connection. The screw connection is a connection method using screw-type terminal blocks. Pay attention to the maximum and minimum cross-sections of the connecting wires and the maximum tightening torque allowed by screws of different specifications.