SU725755A1 - Apparatus for wire reinforcement bending - Google Patents

Description

(54) DEVICE FOR FLEXIBLE WIRE ARMATURE

This invention relates to equipment for bending wires. A machine for the manufacture of serpentine springs from wire is known, in which chains are applied parallel to the axles, on whose axes freely rotating levers are mounted. These levers interact with adjustable copiers installed on both sides of the extending chains and perform uninterrupted bending of the wire as it moves. A disadvantage of the known construction is the following: uneven stretching of the chains, since they are self-sufficient, one of them is always stronger than pulling, and this leads to disruption of the step, to the non-synchronous operation of the levers and, ultimately, to their failure and the breaking of the chain; the eccentric application of forces to the chain due to the cantilever attachment of the levers creates a bending moment acting in the transverse direction, which leads to an increased wear of the chain and sprocket; The centrifugal force on the curvilinear section of the chain (on the zedoochka) limits the performance, and the constant preloading of it by the tensioning device leads to the extension of the chain; besides, the device has poor overall dimensions and is unreliable in operation. It is also known a device for bending wire reinforcement, comprising a feed mechanism and a bending mechanism, made in the form of two-arm levers swiveling about their axes, placed on a movable base, as well as interacting with levers of non-moveable copiers. The movable base is made in the form of a rotating drum, on the perimeter of which at an equal distance one from the circumference from two opposite ends of it are axes carrying the aforementioned levers 2.. The disadvantage of this device is that it has an unreliable link-spring of the output lever, which works simultaneously for torsion

and compression, so it is quickly broken out of order, which leads to the distortion of the desired geometric shape and heal, and then to the breakdown of the device.

In addition, this device has an extra knot, the product straightening mechanism, since the product is first bent around the drum and then straightened in the correct rollers.

The purpose of the device is to simplify the design and increase the reliability of the device.

This goal is achieved by the fact that the movable base of the device is fit in the form of an endless belt, consisting. from each of the plates hinged together among themselves, with the bending lever mounted on each plate.

FIG. T depicts the proposed device, side view; in fig. 2 - the same top view.

The device contains an endless ribbon, made up of individual metal plates I, which are articulated together with fingers 2, left and right levers 3, one per plate, located on axis 4 and having the ability to turn through a certain angle under the action of springs 5.

The belt is driven by the driving drum b and tensioned by the drum 7 by the tensioning device 8. In addition, the bending device has an endless belt, coctched out of separate metal plates I, interconnected by fingers. .

A lever 3 is mounted on each plate, rigidly connected to the axis 4.

Turning the lever relatively

plates on the axis of the lever 4 a torsion spring 5 is mounted, one end of which is attached to the axis, and the other end is attached to the plate

one. / ... - .. ;

Tape I is mounted on two stars, one of which is drive, and the other tension ,.

The tensioning is carried out by the device 8, which can be completed, for example, in the form of a bolt and nut.

To fold the levers into position, the device is provided with fixed stops 9, and to protect against premature opening, the direction is. 10, located on both sides of the wound from tape 1.

The puller 11 is mounted on the device in the form of a fixed plate.

A stripper from the lever with a bent wire and guides its cutting mechanism 12 connected with the drive sprocket kinematic link 13.

The cutting mechanism 12 comprises two rollers that are interconnected by a rigid kinematic bond. Cutters are mounted on rollers.

The wire is fed by a mechanism 14,: consisting of two rotating rollers

The operation of the device is as follows.

From the drive drum 6 receives the movement of the tape 1, carrying levers.

The lever 3, captures the wire and, leaning with one shoulder to the stop 9, the other shoulder bends it at the desired angle. The bending process continues until the lever 3 passes by the guide 10. Then the process is repeated with a lever mounted at the other end of the next plate.

The levers, the exit from the action of the guides 1O, unfold under the action of the springs 5 and approach the stops 9 for a new bending cycle.

According to the puller 11, the finished product is fed to the cutting mechanism 12,

The proposed device will find wide application in bending works, since it is simpler in design and has greater reliability in operation.

Claims (2)

Invention Formula A device for bending wire reinforcement, containing a feed mechanism and a bending mechanism, made in the form of turning relative to its axes of two shoulders bending levers placed on a movable base and interacting with fixed stops, about 10 kg kg, so that design and increased reliability, moving base; made in the form of an endless belt consisting of individual plates hinged together, and a bending bar is installed on each plate, Sources of information taken into account in the examination 1. USSR Author's Certificate No. 14837S, cl. B 21 F 1/00, 1961. 2. USSR author's certificate N9 399277, .kl. B 21 F 1 / OO, 197O.