SU574253A1 - Machine for bending reinforcement lattices - Google Patents

Description

(54) MACHINES FOR FLEXIBLE GUNS

one

The invention relates to the processing of metals by pressure, in particular to devices for the manufacture of reinforcement, and can be applied to the production of reinforced concrete products used in construction.

A device for bending is known, comprising a frame, a frame mounted on it with supports for the workpiece, a bending template installed with the possibility of vertical movement, and forming bodies horizontally movable by means of hydraulic cylinders 1.

In the known device, the uniform movement of the workpiece is not ensured in connection with the various resistances created at the ends of the workpiece. With long blanks, the longitudinal axis is shifted. In addition, the forming bodies are made non-rotating, which impairs the work with the reinforcing mesh which has an increased resistance when the longitudinal reinforcement elements run over the forming bodies.

The known device does not provide for packaging of finished products, which is very important for large-sized products, since the problem of working areas is solved, the work cycle and the occupancy of crane equipment is lengthened.

The aim of the invention is to improve the quality of the product and reduce the proportion of manual labor.

For this purpose, the machine is equipped with a receiving table for spreading blanks above the flexible zone, the forming bodies are non-driven rollers attached to the frame, and conical protrusions are made on the template, which provide

fixing the workpiece in a predetermined position during bending.

FIG. 1 shows a machine, a general view; in fig. 2 - then f; e, side view; in fig. 3 - position of the rolls to bending; in fig. 4 - the same in

bending process; in fig. 5 - the end of the bending, the removal of the product from the zone nbbki and packaging on the table-receiver.

The rebar bending machine contains a bending isblb 1, connected to the drive mechanism by two non-rotating screws 2, one of which has a right-hand thread and the other has a left-hand thread. These screws receive vertical movements from mother-pinion nuts 3 interacting with conical wheels 4, sitting on one shaft 5 with cylindrical bristles 6, receiving rotation from wheel 7, an electric motor 8 sitting on the shaft 8. The entire set of drive is mounted on the base of the 9th bed 10. Pattern 1 has but

The ends of the angular slide 11, interacting with the vertical slide guides 12, providing the pattern 1 with the freedom of only vertical movement. One of the slide guides 12, located on the loading side of the reinforcement mesh, has a gap 13 in the light for the passage of the product. The bed 10 has a rigid structure, on its elements 14 two longitudinal guides 15 are installed, the width of which is adjusted according to the width of the grid loaded for bending. On the supports 16, the frame 10 mounts two end trunnions consisting of guides 17 closed by covers 18. The housings 19 of trunnions 19 are mounted between the guides 17 and have the possibility of horizontal movement towards the machine axis and toward the periphery. The spring 20 positioned between pin 19 and cover 18 presses pin 19 toward the machine axis to the limiting partition 21. Pressing force of spring 20 is adjusted by screw 22. Pin 19 carries non-driven rollers 23 having freedom of rotation around their longitudinal axis and with forces directed in turn The periphery is a bevy, the rolls have the ability to move together with the trunnion housings 19 horizontally, overcoming the force of the springs 20 being pressed. A receiving table, which is two longitudinal supports 24, is mounted above the upper rails 17.

At the top of the template 1 there are several protrusions 25 located along the longitudinal axis of the template 1 and representing cones serving when the template 1 moves upwards to pass them in the light between the reinforcing elements of the grid 26.

The machine is equipped with a limit switch 27, which gives a command to stop the engine and acts through a time relay to supply an electrical command that switches the electric motor 8 to the reverse rotation of the rotor, and the limit switch 28, which turns off the engine 8.

The machine works as follows.

When the pattern 1 moves upwards, it fixes the longitudinal position of the grid 26 with catchers 25 and carries the grid along with it. Meeting on the way rolls 23, template 1 with grid 26 horizontally pushes them, overcoming the resistance of springs 20, and passes between these

Rolls up to a custom limit switch 27.

The bending pattern 1 and the rollers 23 mesh 26 is brought upwards between the two profile supports 24 of the receiving table and, under the action of elastic forces, the transverse (bendable) reinforcing bars are straightened somewhat and the mesh 26 acquires a parabolic profile.

When the pattern 1 moves down, the grid 26 remains on two supports 24. Pattern 1 moves down to the limit switch 28, which turns off the engine 8. When repeating the work cycles, the grids 26 carried out on the supports 24 of the receiving table of the grid 26 enter one another and are assembled into a bag.

Geometric parameters of the curved reinforcing mesh cross sections, close to the true parabola, allow it to be placed between the sides of the form without distortions, which improves the quality of reinforced concrete products, the receiving table for autopacking together with the electro-automatics tools during the working cycle reduces manual labor, provides ease of maintenance, increase the culture of work.

Claims (1)

Invention Formula A machine for bending reinforcing meshes, containing a frame with supports for the workpiece mounted on a frame, a bending template that can be vertically moved, and two forming horizontal-movable bodies, characterized in that, in order to improve the quality of meshes and reduce manual labor, it is equipped with above the bending area reception table for the packaging of blanks, the forming bodies are non-driven rollers spring-loaded to the frame, and conical protrusions are made on the template, ensuring the fixation of the workpiece in a predetermined position when bending. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 405627, cl. In 21D 7/04, 1971. m 77 21 YU 18