RU2116856C1 - Automatic machine for uncoiling tore-like coils of smooth spring wire and three-dimensionally corrugating it - Google Patents

Abstract

FIELD: brush production, namely, manufacture of corrugated pile of smooth spring wire for making metallic brushes. SUBSTANCE: automatic machine includes uncoiling unit, corrugating unit and drum for coiling corrugated wire. Lodgement of uncoiling unit for placing tore-like coils of smooth spring wire is changeable one, it is in the form of hollow truncated pyramid having ribs of rods rigidly joined with bases in the form of plates or discs. Corrugating unit includes two pairs of toothed rollers successively arranged in direction of wire feed and having different-module involute teeth. Rotation axes of one pair of rollers are mutually parallel; rotation axes of another pair are mutually crossed, preferably, by angle 90 deg. Each pair of rollers has mechanism for adjusting distance between roller axes. Drum for coiling corrugated wire includes boss mounted on shaft of rotation drive unit, spokes radially secured to boss and separate chutes mounted on spokes with possibility of radial motion. EFFECT: simplified design, enhanced operation reliability and efficiency, possibility of manufacturing controlled-geometry three-dimensional corrugations. 3 dwg

Description

 The invention relates to brush production, and specifically to the manufacture of corrugated pile from a smooth spring wire, which is used for the manufacture of metal brushes.

 Various devices are known for the manufacture of annular corrugated wire ring blanks from smooth spring wire, which are then cut into pieces and, using bending, turn into a U-shaped wavy pile mounted on brushes. In Nizhny Novgorod, a smooth wire extends between two gear rollers and therefore the corrugated wire has waves located in the same plane. This is the main disadvantage of the known device.

 At the KAMAZ plant, a smooth wire with a lathe is also stretched between two gear rollers and then wound on a sliding mandrel, as a result of which the waviness loses its geometry.

 A device for corrugating wire according to ed. St. N 988429, MKI B 21 F 1/04, 1981, containing disks with gear forming elements placed on two parallel shafts.

 A disadvantage of the known device is that the corrugation unit is not technologically advanced to manufacture, because Teeth-forming cutting tools and machines unknown from practice are required, and the assembly itself is doubtfully operable. The knot does not solve the problem of unwinding toroidal coils of smooth wire and corrugation, as well as manufacturing ring-shaped blanks of corrugated wire.

 A device for corrugating wire according to ed. St. N 1148686, MKI B 21 F 1/04, 1983, adopted for the prototype and containing mounted on the base of the guide for the wire, the mechanism of forming corrugations and the drive winding drum.

The disadvantages of the known device are:
- the inability to obtain a pronounced corrugation of the wire;
- for pulling the wires through the corrugation unit requires a lot of effort, and therefore, a lot of power to rotate the winding drum;
- breakage is not ruled out, for example, of medium-height wire, as a result of which the device can stand idle for a long time and slow down production;
- the device is equipped with special coils and toroidal coils of metallurgical production cannot be used;
- ring-shaped blanks from corrugated wire, especially from spring wire, cannot be manufactured using this device.

 The technical problem solved by this invention is to simplify the design, increase its reliability, increase productivity and provide the ability to obtain controlled geometry of the spatial corrugations.

The proposed solution is aimed at eliminating the described disadvantages. This is achieved by the fact that the machine is made in the form of one module, has one unwinding device and a corrugation unit with spare dies, which allows you to increase productivity with the help of additional unwinding devices, while individual wires are not collected in a bundle, and each wire passes through the corrugation unit separately from others, which allows you to get corrugations of design geometry on all wires, as well as adjust the amplitudes of the corrugations. The corrugation unit of the proposed machine has two pairs of rollers, the axes of the pairs of rollers intersect preferably at an angle of 90 ^o , each pair of rollers is equipped with a mechanism for adjusting the interaxial distance between the axes of the rollers, which prevents wire breakage when the axial load is applied to the wire from a single-speed drive, as well as adjust the amplitude of the corrugation.

Comparative analysis with the prototype shows that the claimed device differs from the prototype in that the lodgement of the unwinding unit on which the toroidal coils of smooth wire are laid is made removable in the form of a hollow truncated pyramid with ribs from rods rigidly connected to the bases in the form of plates or disks, the corrugating unit has two pairs of gear rollers sequentially arranged in the direction of the wire with involute teeth of different modules, the axis of rotation of the rollers are pairwise parallel and pairwise intersected schivayutsya preferably at an angle of 90 ^o, each pair of rollers has a mechanism for adjusting the center distance between the rollers, a drum for winding a corrugated wire is formed as a hub mounted on a rotary drive spokes shaft radially mounted on the hub, the individual chutes are mounted to the spokes, with radial displacement. Thus, the claimed device meets the criteria of the invention of "novelty."

 Comparison of the proposed solutions with other technical solutions in this technical field did not allow to identify in them the features that distinguish the claimed solution from the prototype, which allowed us to conclude that the solution corresponds to the inventive step.

 In FIG. 1 shows an automatic machine for unwinding toroidal coils of a smooth spring wire and its spatial corrugation on the vertical plane of projections.

 In FIG. 2 shows the machine in a plan view.

 In FIG. 3 shows the layout of the rollers in the corrugation unit.

The machine consists of four main parts:
- node 1 for unwinding toroidal coils 2 of smooth spring wire 3;
- node 4 for corrugating smooth wire 3;
- a drum for winding the corrugated wire 5 mounted on the shaft of the rotation drive 6 and consisting of a hub 7, spokes 8 and grooves 9 mounted on the spokes 8 with the possibility of radial movement. The rotation drive 6 is mounted on a frame 10;
- a protective casing 11 with a mesh 12.

The unwinding unit 1 has a base base plate on which a removable lodgement 13 is rigidly fixed in the form of a vertical truncated hollow pyramid consisting of ribs in the form of rods and two bases in the form of plates (disks) that rigidly connect the rods to each other. On the columns 14 on the base plate, two guides are freely mounted on the base plate with two bushings for guiding the smooth wire 3 coming out from under the ring-shaped clamp 16, freely laid on the toroidal bay 2 of smooth wire 3. The dimensions of the lodgement 13 are chosen so that the bay 2 is in the lower position slightly higher than the lower base of the lodgement 13. On the base plate on the stand 17, a hinge assembly 18 is mounted on which a block 19 is provided for directing smooth wire 3 to the corrugation unit 4, as well as the corrugation unit 4. The hinge assembly 18 allows you to remove up the casing 15, the clamp 16 and lay a new bay 2 smooth wire 3. The frame 10 and the casing 11 are attached to the floor 20 using fasteners. The machine is equipped with an electric locking device, which in addition to the push-button station in the idle position of the machine opens the electrical network and prevents the drive 6 from turning on when the operator has access to the spokes 8 and grooves 9. The corrugating unit 4 (Fig. 3) has two pairs of rollers 21 and 22 with pairwise parallel axes rotations 23 and 24. On rollers 21, involute teeth have one module, and on rollers 22, the magnitude of the module is different. To adjust the interaxial distance, the rollers 21 are provided with an adjustment mechanism 25, and the rollers 22 have a mechanism 26. The pairs of axes of rotation 23 and 24 in space are crossed with each other, preferably at an angle of 90 ^o .

 The machine works as follows.

 If there is no coil 2 of wire 3, the hinge assembly 18 together with the block 19 and the assembly 4 for corrugation should be turned clockwise if it is not in a working position, if you look at its vertical projection, remove the shell 15, remove the clamp 16, unpack the coil 2 of smooth spring wire 3 and lay it on the lodgement 13, put the clamp 16 on the coil 2 of the wire 3, put the ring 15 on the columns 14, fold the assembly 18 with the block 19 and the corrugation assembly 4 into working position, thread the smooth wire 3, as indicated in FIG. 1 and the end of the wire 3 to attach to one of the grooves 9. Turn on the drive 6 and the corrugated wire 5 will be wound on the grooves 9 of the drum. Access to knitting needles 8 and gutters 9 is strictly forbidden when operating the machine. When the whole bay 2 of smooth wire 3 is unwound, it is necessary to stop the drive 6 using the push-button station (red button) and swing the locking plate of the locking device to the limit switch. The warning light should light up. In this case, using the push-button station to start the drive 6 is impossible. Next, it is necessary to bandage the wound annular billet of corrugated wire 5 in several places, move the three upper troughs 9 to the axis of the drive 6 to the stop, and then remove the billet from all lodges 13 and set aside. And the cycle of work is repeated.

 The introduction of the machine will allow to eliminate AvtoVAZ’s dependence on the supplier, to receive annual savings, approximately equal to the price of smooth wire.

Claims (1)

An automatic machine for unwinding toroidal coils of a smooth spring wire and its subsequent corrugation, including an unwinding unit, a corrugating unit and a drum for winding a corrugated wire, characterized in that the lodgement of the unwinding unit on which the toroidal coils of smooth wire are laid is removable in in the form of a hollow truncated pyramid with ribs of rods rigidly connected to the bases in the form of plates or disks, the corrugating unit has two pairs in series ennyh in the direction of the wire toothed rollers with involute teeth of different modules, the axis of rotation the rollers are parallel and mutually intersect preferably at an angle of 90 ^o, each pair of rollers has a mechanism for adjusting the center distance between the rollers, a drum for winding a corrugated wire is formed as a hub mounted on the rotation drive shaft, spokes radially mounted on the hub, and individual grooves mounted on the spokes with the possibility of radial movement.

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