SU109784A1 - Rebar Mesh Welding Machine - Google Patents

Description

Machines for welding rebar grids with roller electrodes for one-sided supply of welding current and with a mechanism for cutting the nets are known.

The specific feature of the proposed machine is the use of a contact drum with protrusions for winding the transverse wire and a rocker mechanism with a shuttle for laying the transverse wire on the drum, which results in a simplified design of the device for the continuous feeding of the transverse wire and increases the productivity of the machine.

FIG. 1 shows a diagram of the machine; in fig. 2 is a scheme for laying a transverse wire according to a known variant; in fig. 3 and 4 is a diagram of laying a transverse wire on the proposed options.

The machine consists of a number of knots, providing, unwinding and straightening the reinforcement wire for the longitudinal rods of the mesh, winding the transverse wire, welding the mesh and cutting it into segments of a given length.

The drive of the contact drum of the feeder and the laying of the transverse wire is dried: it is removed from one gearbox. The mesh cutting mechanism must have its own drive.

The work of the machine occurs in the following sequence. The reinforcement wire for the longitudinal rods of the grid, engraved on the coils 1, passes through the correct devices 2 and enters the welding part of the machine, consisting of a contact drum 5 with projections, roller electrodes 4, assembled by an articulated suspension 5 and clamped using pairs Connects to the contact drum 3. To prevent horizontal mixing of the roller electrode 4, the suspension 5 is placed at an angle. The welding transformers 7 are located above the roller electrodes 4, and their secondary turns are connected to the last flexible tires 8.

The number and location of the roller electrodes 4, as well as the length of the contact drum 3, depend on the maximum width of the welded

mesh. To reduce the power consumed by the machine at the same time, the roller electrodes 4 are arranged in a helix on the surface of the contact drum 3, and welding is performed alternately in groups of several points.

The roller electrodes 4 are mixed along the length of the contact drum 3 and set in the desired position depending on the pitch of the longitudinal rods of the grid.

The feeding of the transverse wire is carried out by the link mechanism 9, located in the lower part of the machine, under the contact drum 3. The revolt of the stirrer, placed on the turntable 10, passes through

the correct device // and, around the guide roller 12, passes through the wire holder 13, moving in the directions 14. With simultaneous reciprocating movement of the holder 13 and rotating the contact drum 3, the transverse wire in the tensioned state is wound on the protrusions 15 of the contact drum 3 and stacked on one of the options given pas Fig. 3 and 4. The holder J3 is moved by a link mechanism 9 operating from the gearbox 16 and the electric motor 17. As can be seen from the concept, the turns of the transverse wire are placed under the longitudinal rods and pressed last during the rotation of the contact drum. The tabs / 5 for winding the wire should be tapered and can simply be inserted into the sockets of the contact drum or, if necessary, have a special cam or other device for automatically extending from the contact drum and embedding.

The welding of the intersections of the longitudinal rods and the transverse wire is done in pairs with a one-sided supply of current at the time of the intersection under the roller electrodes. The welded mesh moves along the rollers, passes the straightener 18 and goes to the rotating fires 19, which are periodically turned on and with their knives in one turn produce a mesh across the width.

FIG. 3 and 4 two variants of continuous laying of the transverse wire are shown. When the wire is wound on two protrusions of the contact drum, the distance between which is equal to the pitch of the transverse rods, the latter are parallel to each other (Fig. 3). When winding on one protrusion, the transverse rods are located at an appropriate angle (Fig. 4).

Subject invention

1. Machine for welding rebar grids with contact drum and roller electrodes for one-way current supply, equipped with a batch cutting device for grids, characterized in that, in order to simplify the design and increase productivity, the contact drum pressing the grid to the roller electrodes , provided with protrusions for winding in the transverse direction of the reinforcing wire welded to the longitudinal rods of the grid. 2. Machine under item 1, characterized in that for winding on the protrusions of the drum of reinforcing wire used kulisny mechanism with a holder for the shuttle-type wire.

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