SU741358A1 - Device for stripping enamel-insulated wires - Google Patents

Description

The invention relates to process equipment for preparing wires for installation and can be used in the electrical and instrumentation industry. A device for stripping wires from insulation is known, in which the knives are fastened to the ends of the arms abutting a tapered coupling mounted on the drive shaft. The knife is radially moved by means of levers and rollers 1. A disadvantage of the known device is the inability to set the exact movement of the knives, because of which it can be used only for wires with thick insulation. Another device for stripping electrical wires is known, having a guide sleeve with a hole for insertion of a wire and abrasive wheels mounted on the levers, which are driven by a driving electromotor. Adjustment of the thickness of the insulating layer being removed is carried out by abutment screws by moving the levers 2. This device is closest to the invention in its technical essence and the achieved result. A disadvantage of this device is the low quality of stripping, especially of wires of small diameters, due to the impossibility of precise installation of abrasive wheels with allowance for deviations of wire dimensions. The purpose of the present invention is to improve the quality of stripping and expanding the technological capabilities of the device. This goal is achieved in that the device comprises a mandrel mounted on an electric motor shaft and provided with two diametrically located rollers, a roller, located coaxially with the mandrel and having diametrically mounted fingers, a cylindrical flexible shell, deformed on one side with an ellipse roller and attached to the other side to the stationary base, a coil spring located in the shell and connected to the middle with the fingers of the roller, and the pond has an oppositely directed winding branches, and the cutters are installed on plates attached to the fingers of the rink.

FIG. 1 shows a sectional device in FIG. 2 shows section A-A in FIG. 1 with a conditionally compressed ring.

The device comprises a sleeve 1 with a hole for inserting the stripped wire, a ring 2 with holes I, and grooves for the fingers 3 of the roller 4. The fingers 3 are movable in the radial direction. The ring 2 is prevented from axial movement by spring rings 5 attached to the fingers 3. At the protruding ends of the moving fingers 3, plates b are fixed, carrying carbide cutters 7. The cutters 7 are flat and have cutting edges made in the form of cross-knurling at an angle of 45. The plates-6 are made and attached so as to create a cutting force and constantly touch the tapered end surface of the sleeve 1. The roller 4 with its axis is installed in ball bearings 8 inserted into the cavity of the mandrel 9. The roller 4 is protected from axial movement by spring ring 10 and ring 11. The mandrel 9 is mounted on the shaft 12 of the drive motor and has two tabs with holes in which the axles 13 are inserted, bearing rollers 14. The ball bearings with shields and washers are selected with roller 14. The assembly is deformed into an ellipse or the edge of a flexible shell 15 fixed by a second end on a fixed base 16. A sleeve 1 is screwed into the central threaded hole in the base of 1 €. A spiral spring 17 is inserted into the shell 15, having mutually opposite directions of winding branches from relative to its middle part, with which it bends around the palitsl 3 of the roller 4 internally-externally, as shown in FIG. 2. The ends of the branches of the spring 17 are connected (riveted) to each other by rivets 18 and pressed loosely to the surface of the shell 15 two sections, perpendicular to the axis.

The device works as follows. When the mandrel 9 rotates with rollers 1-4, represented by a wave generator, the medium-length sheath 15 is deformed, the shell 15 undergoes bending oscillations in the plane of the ring 2. With a two-output generator, the angular frequency of the shell deformation

P-2trf-2uu,

where C) is the angular speed of rotation of the generator or wave movement;

f is the frequency of forced oscillations of the shell 15, and, therefore, the spring 17.

Each branch of the spring 17 transmits force and propagates speed in the direction of rotation of the generator. The branches x have oscillations that coincide in phase.

5 For stripping a wire of a certain diameter, the sleeve 1 is screwed into the base 16. Or is twisted out of it until the gap between the cutting edges of the cutters 7 is equal to the diameter of the bare cross-section of the wire. The alignment of the cutters 7 is hereby carried out on the risks on the sleeve and the stand. The stripped end of the wire of the required length is inserted into the hole of the sleeve and after 2-3 seconds is removed back. Particles removed from the wire are ejected through slots in the shell wall. Cutters 7

devices

floating since

in addition to rotation at high speed, they combine oscillatory motion with a sufficient frequency in the radial and partially in the tangential directions.

The effectiveness of this device in comparison with the known structures is that it provides quick and high-quality stripping of enameled wires with a diameter of .0.0 5 mm and above with a simple and convenient setting of the cutters on the wire of the desired diameter.

Claims (2)

1. Collection of rationalization proposals, No. 1 (264), 1974, with. 21. 2. Authors certificate of the USSR 440735, cl. And 02 Gl / 12, 1972.