Device for stripping electrical wires from insulation. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Device for stripping electrical wires from insulation. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electric installation work

The first item in the order of any type of wire connection is: "Release the ends of the connected wires from insulation for a length ...". For this, it is usually proposed to use: a knife, scissors, side cutters, but as a result of such stripping, as a rule, the metal core itself is also damaged. In addition, if there is a silk braid in the wire insulation, it is very difficult to remove it with these tools.

But what if you try to automate the operation to remove insulation from the installation wires? Adaptation, the scheme of which is shown in Fig. 101, will allow not only to quickly and efficiently remove the insulating sheath from the ends of the wires, but also to keep their metal cores intact.

Device for stripping electrical wires from insulation
Rice. 101. Device for removing insulation from mounting wires: 1 - nichrome wire; 2 - holder; 3 - screw; 4 - textolite plate; 5 - button; 6 - screw; 7 - conductive wires; 8 - collar.

You will need: a textolite plate with a thickness of 6-10 mm and an area of about 120 x 30 mm; nichrome wire with a diameter of 0,7-0,9 mm, holders, screws, pieces of electrical wire, a button and a metal clamp. Assembly of the fixture is not difficult even for a novice electrician: all parts are mounted on a textolite plate with screws. Now you need to take care of the power supply of the device with electric current. It is impossible to directly connect it to the home electrical network, due to the fact that a thin nichrome wire is not able to withstand a voltage of 220 V. Therefore, the device is connected to the network through a transformer whose secondary winding is designed for a voltage of 4-5 V at a current of 4-5 A.

If there is no such transformer at hand, you can wind it yourself: the TVK-110L-1 brand transformer is taken as the basis, from which all secondary windings are removed; then a new secondary winding is wound, consisting of 45 turns of PEV-1 wire with a diameter of 1,2 mm. During the operation of the device, the primary winding of the transformer must always be connected to the network, and a nichrome wire is connected to the secondary for a short time (closing the circuit with a button). The device works like this: the button is pressed for 2-3 seconds, the end of the wire being processed is inserted into the working part of the nichrome wire, the wire is turned 1-1,5 turns. The insulation cut in this way can be easily removed with tweezers.

Author: Korshevr N.G.

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