Views: 3 Author: Site Editor Publish Time: 2019-10-28 Origin: Site
precision terminal blocks are common connection accessories in the industrial automation industry. They are widely available in a wide range of functions and have absolute advantages in wire connection and signal transmission. The termination method refers to the way the terminal contacts the wire or cable. Reasonable choice of connection and proper use of termination technology is also an important aspect of using and selecting plastic terminal blocks.
The most common way to weld is tin soldering. The most important characteristic of a solder joint is the continuity of the metal between the solder and the surface being welded. Therefore, for the terminal block and the cold-pressed terminal, it is important that the solderability is good. The most common coatings for soldering terminal blocks are tin alloys, silver and gold. Reed - type contact on the common welding end are welding - type, punching - type and notching - type: pinhole contacts have a drilled arc notch for common solder ends.
Crimping is a technique for compressing and displacing metal within specified limits and connecting the wires to the contact pairs. A good crimp connection creates a metal interflow flow that causes the wire and contact to deform symmetrically relative to the material. This type of connection is similar to a cold welded joint, providing better mechanical strength and electrical continuity and withstanding harsher environmental conditions. It is generally accepted that the correct crimp connection is better than soldering, especially in high current applications where crimping is required. When crimping, special crimping pliers or automatic and semi-automatic crimping machines shall be used. According to the cold-pressed terminals, the cross-section of the cold-pressed end conductors shall be correctly selected. It should be noted that the crimp connection is a permanent connection and can only be used once.
Winding is to wrap the wire directly around the angular contact wrap. When wound, the wire is wound under tension, pressed and fixed at the corners of the contact wrap to form a hermetic contact. There are several requirements for the winding wire: the nominal value of the wire diameter should be in the range of 0.25mm~1.0mm; when the wire diameter is not more than 0.5mm, the elongation of the conductor material is not less than 15%; when the wire diameter is larger than 0.5mm, the conductor The elongation of the material is not less than 20%. Wound tools include a gun and a stationary wrap machine.
Screwing is a connection method using a screw-type precision terminal block. It is necessary to pay attention to the maximum and minimum cross-section of the connecting wire and the maximum tightening torque allowed by the screw of different specifications.
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