SU435081A1 - MACHINE FOR CONTACT SPEECH WELDING REFERENCE NETS - Google Patents

Description

one

The invention relates to the manufacture of rebar grids with clamps and can be used in the manufacture of reinforced concrete products.

A known machine for resistance welding of rebar grids containing longitudinal and transverse rods feed mechanisms arranged on the frame, a movable yoke with electrodes for welding clamps, which has a low productivity.

The disadvantage of such a device is also its complexity and unreliability in operation due to the presence of welding of two separate welding units and a transmitting device.

The aim of the invention is to increase productivity, reduce the complexity of manufacturing grids with clamps and simplify the design. This is achieved by the fact that electrodes for welding clamps and pneumo scissors for their lengths are mounted directly on the frame, the electrodes, the upper ones of which are fixed and the lower ones on the rods of the pneumatic cylinders, are located next to the electrodes of the welding machine in the same vertical plane.

The transverse reinforcement bar fed to the machine during welding of the fixings and welding it to the longitudinal reinforcement is not transferred from one welding unit to another, but is located at the same place (between the upper and lower electrodes), thereby increasing the productivity of the line.

FIG. 1 shows the proposed machine, plan view; in fig. 2 - device for welding clamps to the grids, side view; in fig. 3 is a section along the A-L in FIG. 2. The machine consists of 1 coils

feed longitudinal wire and wire to form clamps, welding device 2, transverse wire feeding device 3, device 4 for welding clamps, device 5 for cutting the grids, staple packer of finished grids 6.

The device 4 for welding clamps consists of a yoke 7 on which ball-collet grippers 8 are fixed. The traverse is driven from the pneumatic cylinder 9.

A guide bushing 11 and pneumatic shears 12 serve to form the clips 10 of the wire, after it is welded to the transverse rods. The welding device for welding the clips consists of upper stationary electrodes 13 and, accordingly, the same number of lower movable electrodes 14 attached to the rods of the pneumatic cylinders . These electrodes are mounted on a bed next to

electrodes 15 and 16 for transverse welding

wire with a longitudinal in the same vertical plane. The electrodes 13 and 14 serve to weld the wire 10 to the transverse rod 17 located in the grippers 18, which consist of two jaws articulated with a spring, forming a channel for the transverse rod 17. The holes in the channel are such that the rod is in them free state.

The machine works as follows.

The longitudinal wires from the coil holders 1 are fed into the welding device 2. The device 3 feeds the transverse rods 17 into the grippers 18, after which the pivot cylinder 9 is activated, and the collet grips 8 located on the yoke 7 are fed to the clamps 10, which passes through the guide sleeve And pneumatic shears 12. The end of the wire must be between the electrodes 13 and 14 above the transverse rod 17. The electrodes 13 and 14 of the wire are welded to the transverse rod 17, after which the pneumatic scissors 12 operate cut off the end of the wire with a length equal to the length of the clamp. The transverse rod 17 with welded fasteners (the so-called "comb") is in the grippers 18 in a free state. Under the action of its own weight and due to the displacement of the center of gravity of the comb (the welded and cut clamps have different shoulders relative to the transverse rod 17) is rotated 90 ° so that the clamps take up a vertical position. Then, electrodes 15 and

16, KOTOpbie is welded “comb to the longitudinal wires 19, thus forming a grid with fic; sators. With the help of the gripper 20, the screen advances one step. Then all operations are repeated. Due to the fact that the fixing of clamps is not performed to each transverse rod, but through 0.6-0.7 m, the supply at the required time of the wire for clamps 10 by the cylinder 9 and its welding to the transverse rod 17 is controlled by the automation system.

Subject (invention

Machine for contact spot welding of rebar grids with clamps, containing mechanisms for feeding longitudinal and transverse rods placed on the frame, traverse with collet wire grippers for clamps installed with the possibility of longitudinal movement from the pneumatic drive, pneumoscissors for cutting clamps, electrodes for welding clamps to the transverse rod and electrodes for welding transverse rods with clamps with longitudinal rods, characterized in that, in order to increase productivity and simplify the struction, electrodes

for welding clamps and pneumozhnitsy for their segments are installed directly on the frame and are located in the same vertical plane with the electrodes for welding longitudinal rods with transverse rods

with latches, alternate with pimi. W

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FIG. 3