Pliers are a common hand tool, generally V-shaped in shape, and usually include three parts: handle, pliers cheeks and pliers mouth. They can be used to clamp and fix workpieces or to twist, bend and cut metal wires. There are many kinds of pliers, which can be divided into ""
1, which can be divided into: clamp-torsion type, shear type and clamp-torsion shear type according to performance.
2. According to the shape, it can be divided into: sharp mouth, flat mouth, round mouth, curved mouth, oblique mouth, needle mouth, top cutting, wire pliers, gill pliers and so on.
3. According to the purpose, it can be divided into DIY manual pliers, industrial pliers and special pliers.
4. According to the structural form, it can be divided into gill piercing pliers and gill folding pliers.
5. According to specifications, it can be divided into: 4.5 (mini pliers), 5, 6, 7, 8, 9.5, etc.
Second, the types and uses of commonly used pliers
Pliers have many functions and are used in many industries. Pliers used in different industries are also different. Generally speaking, the commonly used pliers are:
1, wire stripper
Wire stripper is a common tool for internal electricians, motor maintenance workers and instrument electricians. It consists of a knife edge, a wire pressing port and a clamping handle, and is mainly used for stripping plastic and rubber insulated wires and cable cores.
2. scissors
Also known as vice, it is a tool for clamping and shearing, which consists of jaws, teeth, blades, jaws and pliers handles, and is mostly used for lifting nails or clamping nails and wires.
3. Nozzle pliers
It can be divided into electrician and electronics. Mainly used for cutting injection molding machine products, plastic products and injection nozzles, and also suitable for cutting pins of metal products and electronic components.
4, needle-nosed pliers
Also known as mouth-repairing pliers, needle-nosed pliers and needle-nosed pliers, it consists of a sharp point, a knife edge and a pliers handle, and is generally made of 45# steel. They are used to cut single-stranded and multi-stranded wires with smaller diameters, bend single-stranded wire joints, peel off plastic insulation layers and so on. And can be operated in a narrow working space.
5. Bending pliers
Also known as elbow pliers, the function is similar to that of needle-nosed pliers without cutting edge, and it is suitable for narrow or sunken working spaces.
6, flat nose pliers
This is a tool commonly used in assembling metal parts and telecom engineering. It is generally used to bend metal plates and wires into required shapes, and to assemble and pull pins and springs in repair work.
7, oblique nose pliers
It is mainly used for cutting metal wires, and the flat pliers are suitable for concave working spaces.
8. Top cutting pliers
Top cutting pliers are similar to oblique-nosed pliers, and are mainly used for cutting steel wires, with the cutting edge at the top.
9, water pump pliers
The function is similar to that of a pipe wrench, but it is lighter, smaller and easier to use, but the clamping force is not as good as that of a pipe wrench. Generally, it is only suitable for non-professional emergency or simply installing water pipes at home.
10, carp pliers
The shape is similar to carp, and the width of the opening of the lower jaw has two adjustable positions, which can be enlarged or reduced. It is mainly used to clamp round parts, and can also replace wrenches to turn small nuts and bolts, which is often used in the auto repair industry.
1 1, snap ring pliers
Commonly known as circlip pliers, it is a special tool for installing inner circlip and outer circlip, and can also be used for disassembling circlip. .
12, pliers
Mainly used for clamping parts for riveting, welding, grinding and other processing, and can also be used as a wrench. Its characteristic is that the jaws can be locked, which produces great clamping force, so that the clamped parts will not loosen.