SU997929A1 - Apparatus for bending articles from wire and rods - Google Patents

Description

one

The invention relates to devices for bending metallic materials with a continuous feed cycle of blanks, in particular for bending products from wire and rods.

A device for bending metal wires and rods is known, comprising an axially mounted hollow central shaft with a disk on which an adjustable bending roller is located eccentrically, a guide element and a cutting mechanism, and which has an additional shaft placed inside the hollow shaft with the possibility of axial movement, on which the ggcTKO is fixed to a guide element, made in the form of a groove having a Y-shaped cross section, the bottom of which is parallel to the axis of the wire feed, and the side walls the chutes have a variable height increasing in the direction of the shaft 1.

A disadvantage of the known device is the inaccurate molding of the corners of the product from wire and rods due to the absence of a mandrel. It is possible to obtain unequal products due to intermittent wire feed, as well as low device performance due to the cyclical nature of the work.

It is also known a device for the continuous manufacture of wire rings, comprising a rotating mandrel, a spring-loaded cutting knife rotating synchronously with the mandrel, a mechanism for moving turns on the mandrel, and a spring-loaded bending punch mounted in the through radial groove of the water bushing and to the end of the mandrel. matrix 2 is rigidly attached.

The drawbacks of this device are the strong friction that occurs on the mandrel, cam and contour, which reduces the frenzy of these nodes, as well as the lack of accuracy of the finished product after cutting due to the change in the geometric shape when sliding along the helical surface without forcibly fitting the wire to the mandrel.

The closest to the technical essence of the invention is a bending machine, comprising a workpiece feed mechanism, a bending mechanism, consisting of a driving mandrel and

pressure rollers, and the mechanism for cutting the finished product with a drive

However, the device is complex and complicated, and the resulting product is not of sufficient quality, since the matrix-mandrel rotates only when the carbon bends.

The purpose of the invention is to improve the quality of products.

This goal is achieved by the fact that the device for bending products made from wire and rods, containing the workpiece feed mechanism, bending mechanism consisting of a drive mandrel and pressure rollers and a drive-cut part mechanism, has a product remover with a mandrel made in the form of a coil of a spiral whose center coincides with the axis of rotation of the mandrel.

In addition, the knives of the cutting mechanism are placed perpendicular to one another and spring-loaded on the mandrel.

The drive of the cut-off mechanism consists of two cams fixedly fixed on the body and in contact with the blades.

FIG. 1 shows an automatic front view; in fig. 2 - side view; in fig. 3 shows section A-A in FIG. 2

The machine for bending products consists of a housing 1, an electric motor 2: a V-belt transmission 3, a flywheel 4, a gearbox 5 with a main shaft 6 coaxially mounted, a tension device 7 consisting of a spinneret 8, two fixed 9 and one movable 10 rollers, rotating drum-mandrel 11 for bending the wire or rods, node pieces. The cut unit consists of a transverse knife 12 with a finger 13 and a roller 14, a pusher 15 with a spring and a stationary driving cam 16, as well as from the cutting knife 17 and the driving cam 18 in the form of a radial ball bearing. The clamping mechanism of the automatic machine for bending products consists of spring-loaded rods 19-22, with springs 23-26. At the ends of the spring-loaded rods 19-22 in contact with the drum-mandrel 11, there are rollers 27-. 30, which are withdrawn from the surface of the drum amendment 11 by levers. The finished product is shifted by the release plate 31. The wire is unwound from the rotating coil 32.

Machine for bending products works as follows.

The wire from the rotating coil 33 is passed through the die plate 8 of the tension device 7, where the wire is straightened with the help of two fixed 9 and one movable 10 rollers. Further, the free end of the wire is pulled to the drum-mandrel 11 and clamped by the pressure roller 27 to the surface of the drum-mandrel 11. The roller 27 is withdrawn by the lever 31 of the spring-loaded rod 19 from the surface of the drum-11 when refueling the wire. drum mandrel 11 successively in the course of its rotation, the number of which is determined depending on the received configuration of the product. After filling the wire under the roller 27, the first corner of the resulting frame is formed by rotating the knob-flywheel 4 of the drive manually. After that, the motor is turned on.

2, the drive is transmitted through a klimport 3 and a cylindrical two-stage gearbox 5 to the main shaft 6, on which is mounted a drum-mandrel 11, repeating the shape of a rectangular frame with its working surface. The wire is pressed against the surface of the drum-mandrel 11 by the pressure rollers 27-30, while they are in contact with the surface of the drum-mandrel 11 with at least two of its planes. Wire

when the drum-mandrel 11 completes the revolution of the mandrel-11, the cross-cutter 12 bends into the rectangular frame attached to the drum-mandrel 11 on a fixed driving cam 16 fixed to the housing 1, above the surface of the drum-mandrel 11 using the pusher 15 with a spring. The wire turns on p & cutting edge of the cross-cutter 12. With a small delay behind the cross-cutter 12, the cutting blade 17, also attached to the drummetal 11, begins to extend when it slides over the drive cam 18 fixed to the housing 1. The knife 17 cuts the wire that falls between it and the cross-cutter 12 The finished frame is removed from the surface of the drum-mandrel 11 and shifted forward by the squeeze-plate 32, thus forming a slightly stretched spring and, due to its springing, bounces forward, stringing on a special stand assetnik. The process is made. The frame is produced continuously, as the beginning of a new turn of the frame supplied by the tensioning device 7 remains under the pressure rollers 27-30.

The use of the proposed device for bending will improve the quality of the products obtained in comparison with the known device and obtain an economic effect of about 4.5 thousand rubles. per year per device.

Claims (3)

1. A device for bending products made from wire and rods, comprising a billet feed mechanism arranged in a housing, a bending mechanism consisting of a drive mandrel and pressure rollers, and a cut-off mechanism for a finished product, characterized in that, t in order to improve the quality of the product, it has a tool puller with a mandrel, made in the form of a spiral turn, the center of which coincides with the axis of rotation of the mandrel. 2. The device according to claim 1, characterized in that the knives of the cutting mechanism are placed on the mandrel perpendicular to one another and are spring-loaded. . 3. The device according to claim 1, characterized in that the drive mechanism of the segments consists of two fixedly mounted on the body of the cams in contact with the blades. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 592337, cl. B 21 F 1/00, .1978. 2. USSR author's certificate number 609581, cl. B 21 F 1/06, 1978. 3. USSR author's certificate number 528138, cl. B 21 F 37/04, 1974.