Classification And Main Functions Of Pliers

Pliers are a type of manual tool used to clamp, fix, or twist, bend, or cut metal wires during machining. The shape of pliers is V-shaped, usually consisting of three parts: handle, jaw, and mouth.
Pliers are generally made of carbon structural steel, which is first forged and rolled into the shape of a clamp blank, then subjected to metal cutting processes such as milling and polishing, and finally subjected to heat treatment. The handle of the pliers is designed in three styles: straight handle, curved handle, and bow handle, depending on the gripping form. The pliers are often in contact with live conductors such as wires, so the handle is usually covered with a protective tube made of insulating materials such as polyvinyl chloride to ensure the safety of the operator.
There are many forms of pliers, including pointed mouth, flat mouth, flat mouth, round mouth, curved mouth, etc., which can adapt to the operation needs of workpieces with different shapes. According to their main functions and usage properties, pliers can be divided into clamping pliers, wire pliers, wire stripping pliers, pipe pliers, etc.
1. Wire pliers: Wire pliers are a type of pliers and cutting tool. The wire pliers consist of a pliers head and a pliers handle, with the pliers head including jaws, teeth, cutting edge, and cutting edge. The functions of each part of the pliers are: ① The tooth opening can be used to tighten or loosen nuts; ② The blade can be used to cut the rubber or plastic insulation layer of soft wires, as well as to cut wires and iron wires The cutting edge can be used to cut harder metal wires such as wires and steel wires; ④ The insulated plastic tube of the pliers has a voltage resistance of over 500V, and with it, it can cut wires with electricity. During use, avoid littering. To avoid damaging the insulated plastic pipe. The commonly used wire pliers for electricians come in various specifications such as 150mm, 175mm, 200mm, and 250mm.
2. Needle nosed pliers: Needle nosed pliers, also known as trimming pliers, are mainly used to cut thin single and multi strand wires, as well as bend the wire joints of single strand needle nosed pliers, peel off plastic insulation layers, etc. It is also one of the commonly used tools for electricians (especially for internal line electricians). It is composed of a pointed tip, a blade, and a handle. The handle of the pointed nose pliers used by electricians is covered with an insulated sleeve with a rated voltage of 500V. Due to its pointed head, the needle nosed pliers can be used in narrow spaces. The method of bending the wire connector with the needle nosed pliers is to first bend the wire head to the left, and then bend it clockwise to the right against the screw.