RU2170163C1 - Process for multipoint resistance welding of reinforcement gauzes - Google Patents

Abstract

FIELD: wire gauze production, possibly building industry branch, in plants for making reinforcement or ferroconcrete products. SUBSTANCE: coils with wound wire for lengthwise rods are placed in rotatably mounted coil holders whose number is equal to maximum number of lengthwise rods of gauze. Coil with wire for crosswise rods is placed in coil holder rotatably mounted with possibility of freely uncoiling wire turn-by-turn while wire embraces coil at uncoiling. Power shaft with pressure rollers is mounted with possibility for providing traction effort for uncoiling wire of coils for lengthwise rods, for moving it along guiding tubes and straightening in roller straightening apparatuses. Shaft for feeding wire of crosswise rods by length value set for each rod is mounted with possibility for creating traction effort for uncoiling wire and straightening it in straightening apparatuses. In resistance welding machine upper electrodes are placed on each cross bar in such a way that they are mutually spaced by distance corresponding to pitch between lengthwise rods of respective gauze. Welding transformers are connected to lower electrode holders with possibility for connecting each welding transformer to electric current supply circuit in dependence upon pitch between lengthwise rods of gauze and its width. Invention allows to make gauzes of different width and length with different pitch between lengthwise rods of gauzes, possibly of the same gauze. Diameter and length of rods are also may be different. EFFECT: enlarged using range and assortment of gauzes. 3 cl, 9 dwg

Description

 The invention relates to the field of production of wire mesh, in particular to machines for multipoint contact welding of reinforcing mesh, wire feed devices for longitudinal rods and wire feed devices for transverse rods, and can be used in the construction industry, in particular in reinforcing plants or factories of reinforced concrete products .

 A machine is known for multi-spot resistance welding of wide meshes, in which longitudinal reinforcing bars are laid out on working rollers between the upper and lower electrodes, depending on the distance between the longitudinal rods, after combining the axes of the electrodes, current is supplied from the transformers to the lower electrodes that are mounted on the beam / SU 1590277 , B 23 K 11/10, September 7, 90 /. The machine allows you to weld a wide range of grids, but at the same time it occupies large production areas.

 Closest to this invention is a known machine for multipoint contact welding of reinforcing meshes, comprising a bed, a wire feeder for longitudinal rods, a wire feeder for transverse rods, welding transformers located across the wire feed direction for longitudinal rods, lower electrode holders with electrodes and, mounted on a traverse with the possibility of vertical movement, shunting upper electrodes / RU 2034685, B 23 K 11/10, 10.05.95 /. This machine allows you to produce high quality nets by ensuring flatness, but the size of the manufactured nets is limited.

 A device for supplying wire for longitudinal rods to a machine of multi-point contact welding of reinforcing meshes containing bay holders located on the bed with wire coils, the correct mechanism, a power shaft with pressure rollers and a loop drive / SU 544358, 23 K 11/10, 20.06.77 / . The device allows to ensure the continuity of the machine for multi-spot resistance welding, but at the same time allows to produce a limited size of grids.

 Also known is a wire feed device for transverse rods to a multi-spot resistance welding machine of reinforcing bars, comprising a wire coil mounted on a freely rotating coil holder, wire cutting shears and a stacker for welding machine electrodes / SU 193641, 23K 11/10, 05/29/67 /. This device allows you to weld a fine mesh made of thin wire.

 The objective of this group of inventions is the creation of devices that make it possible to produce reinforcing meshes of various sizes and with different steps between longitudinal rods to ensure flatness of the meshes, increasing the productivity of manufacturing meshes and ensuring the convenience of its maintenance.

 For this, a machine for multipoint contact welding of reinforcing meshes containing a bed, a wire feeder for longitudinal rods, a wire feeder for transverse rods, welding transformers located across the wire feed direction for longitudinal rods, lower electrode holders with electrodes and mounted on the traverse with the possibility of vertical movements, shunting the upper electrodes, is equipped with at least one additional traverse with installed on it with the possibility vertical movement of the shunting upper electrodes, the traverses are removable, the upper shunting electrodes are mounted on each traverse at a distance from each other, corresponding to the step between the longitudinal rods in the grid, and the connection circuit of welding transformers to the lower electrode holders is made with the possibility of including each transformer in the current supply circuit in depending on the pitch between the longitudinal rods in a particular fabricated mesh and on its width.

 A wire feed device for longitudinal rods in a multi-point contact welding machine of reinforcing meshes, containing bay holders with wire coils located on the bed, a correct mechanism, a power shaft with pressure rollers and a loop store, equipped with a guide system consisting of separate guide pipes and installed in front of the correct mechanism, and a positioning shaft located after the loop drive, the correct mechanism is made in the form of mutually perpendicularly located roller rules, forces The new shaft is made with the possibility of creating traction for unwinding the coils of the wire, moving it along the guide tubes and straightening in the roller rules, and the coils are made freely rotating amount equal to the maximum number of longitudinal rods in the grid.

 A wire feed device for the transverse rods to a multi-spot resistance welding machine of reinforcing rods containing a wire coil mounted on a freely rotating coil holder, wire cutting shears and a stacker for welding machine electrodes is equipped with a looper mounted behind the coil holder, the correct mechanism consisting of roller rules and located after the loop drive, and the wire feed shaft to a predetermined length for each rod, configured to create traction CSO efforts to unwind the bay and wire straightening it in the roller pravilkah and bay freely installed on buhtoderzhatele configured to ensure unwinding of the coil of wire coil and rounding bay unwinding.

 In FIG. 1 shows a multi-spot resistance welding machine for the manufacture of reinforcing meshes / general view /, in FIG. 2 is a plan view of FIG. 1, in FIG. 3 - part of the welding machine in FIG. 1, in FIG. 4 is a plan view of FIG. 3, in FIG. 5 is a connection diagram of welding transformers and current leads to the upper shunt electrodes; FIG. 6 shows a wire feed device for transverse rods; FIG. 7 - coils holder wire coils for the transverse rods, in FIG. 8 is a plan view of FIG. 6; FIG. 9 - positional shaft and welding machine.

 The machine for contact welding of reinforcing meshes comprises bay holders 1 of wire coils for longitudinal rods, a guide system 2 consisting of separate guide tubes, a correct mechanism consisting of mutually perpendicularly located roller rules 3, power shaft 4, loop drive 5, position shaft 6, welding machine 7, a grid guiding device 8, a mesh cutting mechanism 9, a baler 10, a coil holder 11 of a wire coil for transverse rods with a conical nozzle 12, a looper 13 of a wire for transverse c rods, the node 14 of the reversal and direction of the wire for the transverse rods, the correct mechanism 15, the shaft 16 of the wire feed for the transverse rods, scissors 17 cut the wire for the transverse rods, stacker 18 of this wire. In the welding machine 7, lower electrode holders 19 are installed, to which voltage is supplied from the welding transformers 20. On the lower electrode holders 19, electrodes 21 are installed at a distance between them, which is calculated depending on the step between the longitudinal rods in the grid. In the welding current supply circuit, electrodes 21 are used depending on the parameters of the particular mesh being welded. Also, depending on the step between the longitudinal rods in the grid between the longitudinal rods in the grid, the voltage supply circuit for the necessary welding transformers 20 is selected. The welding voltage is supplied to the welded points by the current shunt circuit by the upper shunt electrodes 22 and 24, which are installed in pairs on the upper electrode holders 23 and 25. The electrode holders 23 and 25 are installed on removable traverses 26 and 27, which are mounted on the welding machine 7 depending on the distance between the longitudinal rods E manufactured in the grid. The correct mechanism, the guiding system 2 installed behind it, the loop drive 5, the positioning shaft 6 behind it for feeding wires for the longitudinal rods to the desired step under the electrodes of the welding machine and the power shaft 4 with pressure rollers 29, configured to create a pulling force for unwinding wire coils for longitudinal rods, its movement along the guide tubes and straightening in roller rules constitute a device for feeding wires for longitudinal rods. The wire feed device for the transverse rods includes a loop accumulator 13 installed behind the coil holder of the wire coil for the transverse rods, a correct mechanism 15 consisting of roller rules and located after the loop accumulator 13, and a wire feed shaft 16 for the transverse rods to a length set for each rod, made with the possibility of creating traction to unwind the coil of wire and straightening it in the roller rules.

 To guide the wire 28, a freely rotating shaft 30 is installed in the loop accumulator 5. A straightening device 31 and pinch rollers 29 are installed on the positioning shaft 6 similarly to the power shaft 4.

 The operation of the machine is carried out in the following sequence. Depending on the step size between the longitudinal rods in the particular fabricated mesh and on its width, the connection diagram of the welding transformers 20 to the lower electrode holders 19 and their number are determined. Also, one of the traverses 26 or 27 with shunt electrodes mounted on them is selected from the size of this step, which is installed on the welding machine 7.

 The coils of wire 28 with the required diameters for the fabricated mesh are installed on freely rotating coil holders 1, the number of coils must correspond to the maximum number of longitudinal rods in the fabricated mesh. Each wire 28 on a separate guide tube of the guide system 2 is fed into the roller rules 3 of the correct mechanism. Then the wire 28 is pulled into the power shaft 4 and pressed by the pinch roller 29. Further unwinding of the wire coil, moving it along the guide tubes and straightening in the roller rules is carried out by the pulling force of the power shaft 4. The straightened wire 28 is fed into the loop drive 5, then through the roller rules 31 pushed to the positioning shaft 6, superimposed on it and pressed with a pinch roller similar to pinch roller 29. Then, the second and subsequent wires are fed and pressed onto the positional shaft 6 ki 28. Thereafter, the positional shaft 6, all the longitudinal wires 28 are fed into the weld zone under the electrodes 21, 22 and 24.

 A coil of wire 32 with the required diameter for the transverse rods in the fabricated mesh is mounted on a freely rotating coil holder 11, fed to a wire accumulator 13, and the unwinding wire turns round the coil with a conical nozzle 12, thereby facilitating easier unwinding of the bay, and prevents wire 32 is stuck between adjacent turns, passes through the node 14 of the turn and direction of the wire, then fed into the correct mechanism, consisting of two mutually perpendicular rolls rules 15. The unwinding of the coil of wire 32 and its straightening in the roller rules 15 is carried out by the pulling force of the wire feed shaft 16 32. With the same force, the wire 32 is pushed through two mutually perpendicular roller rules 33 and fed into the stacker 18 to the length required for the transverse rod in the mesh . Measured to the desired length of the wire 32 is cut with scissors 17. The automatic line is ready for welding a given type of mesh. The automatic mesh production mode is turned on. The stacker 18 feeds the cut wire 32 between the lower electrodes 21 and the upper 22 and 24. The wires 28 are already above the lower electrodes 21. The upper electrode holders 23 or 25 are lowered and clamped between the upper electrodes 22 or 24 and the lower 21 wires 32 and 28. Voltage is supplied to the electrodes from welding transformers 20 and wire 32 is welded to wires 28. Then, the upper electrode holders 23 or 25 rise together with the electrodes 22 or 24. The grid is moved by the positioning shaft 6 to a predetermined between the transverse and the rods step, at the same time, the next wire 32 is fed into the stacker 18 and cut it to a predetermined length. Upon completion of the filing of the mesh at a given step by the positioning shaft 6 and its segments, a new cycle begins from the moment the wire 32 is fed between the electrodes 21, the electrodes 21 and 22 or 24. Next, the mesh through the mesh guiding device 8 is fed under the mesh cutting mechanism 9 and enters the baler 10 . When the specified mesh length is reached, it is cut off by the cutting mechanism 9 and stacked by the baler 10 in bundles. The mesh manufacturing cycle is repeated until a predetermined number of nets in a bundle is reached. From the moment the automatic mode is turned on, the power shaft 4 is turned on, which continuously unwinds the coils of wire 28 for the longitudinal rods of the grid, straightens them by pulling through the correct mechanisms and creates a reserve of straightened wire 28 in the loop drive 5.

 The use of a group of inventions for the manufacture of reinforcing meshes makes it possible to obtain meshes of various widths and lengths with different spacing between longitudinal rods, including in the same mesh, the diameters and lengths of the rods in one mesh can also be different, in addition, high performance of mesh manufacturing .

Claims (3)

 1. Machine for multipoint contact welding of reinforcing meshes, comprising a bed, a wire feed device for longitudinal rods, a wire feed device for transverse rods, lower electrode holders with electrodes located across the wire feed direction for longitudinal rods, welding transformers connected to the lower electrode holders, and installed on the traverse with the possibility of vertical movement shunting upper electrodes, characterized in that it is equipped with at least one additional an additional traverse with shunting upper electrodes mounted on it with the possibility of vertical movement, the traverses are interchangeable, the upper shunt electrodes are installed on each traverse at a distance from each other, corresponding to the step between the longitudinal rods in the grid, and welding transformers are connected to the lower electrode holders with the possibility of switching on each transformer in the current supply circuit depending on the step between the longitudinal rods of the fabricated mesh and its width.  2. A wire feed device for longitudinal rods in a multi-spot resistance welding machine of reinforcing meshes, containing bay holders with wire coils located on the bed, a correct mechanism, a power shaft with pressure rollers and a loop drive, characterized in that it is equipped with a guide system consisting of separate guides pipes and installed in front of the correct mechanism, and the positioning shaft placed after the loop drive, the correct mechanism is made in the form of mutually perpendicularly located roller rules, the power shaft is made with the possibility of creating traction for unwinding the coils of the wire, moving it along the guide tubes and straightening in the roller rules, and the coil holders, the number of which is equal to the maximum number of longitudinal rods in the grid, are made with the possibility of free rotation.  3. A wire feed device for the transverse rods to a multi-spot resistance welding machine of reinforcing bars, comprising a free-rotation coil holder with a coil of wire mounted thereon, wire cutting shears and a stacker for welding machine electrodes, characterized in that it is provided with a loop drive installed behind the bay holder, the correct mechanism, consisting of roller rules, located after the loop drive, and the wire feed shaft to the specified for each eraser nya length adapted to create a driving force for unrolling the bay wire and straightening it to the roller pravilkah, wherein buhtoderzhatel adapted to unwinding a coil of wire for the coil and enveloping its bay when unwinding, and freely mounted on the bight buhtoderzhatele.

Images