SU1171253A1 - Installation for resistance welding of lattices - Google Patents

Description

2, Installation according to claim 1, characterized in that the mechanism for lifting and laterally feeding the longitudinal rods is designed as a copier with curved grooves and related

between themselves by means of a power QI lindra, and mounted in grooves with the possibility of moving tubes for placing rods in them.

The invention relates to mechanical engineering, in particular to the production of systems for resistance welding of gratings. The purpose of the invention is to increase the productivity by ensuring that the longitudinal feed of the longitudinal rods into the welding zone is combined with the end time of the previous grid. FIG. 1 shows the installation, a general VIEW} in FIG. 2. - mechanism under chi longitudinal rods, side view; in fig. 3 - the mechanism of the transverse under longitudinal rods on the lower electrodes, top view; in fig. 4 is the same, in the initial state, the cross section; figure 5 - the same, at the time of the filing of the longitudinal rods on the bottom electrodes. The installation for contact welding of gratings consists of a frame 1 on which welding heads 2 are installed for simultaneous welding of the transverse rod 3 to the longitudinal rods 4, which is the basis of the grating, bunker devices 5 for supplying the longitudinal rods 4 of the longitudinal rod feeding mechanism 6, the bunker device 7 for supplying the transverse rods 3 to the welding zone, a mechanism 8 for stepping the grating, mechanisms 9 for cutting off the ends of the transverse rods 3. Each hopper device 5 for supplying with longitudinal rods 4 has a tray-n storage ring 10, Noe hopper device 7 for feeding transverse rods 3 has a storage tray 11. Each welding head 2 has a bottom electrode 12 and top electrode 13 that receives the reciprocating motion of the actuator. The step to the length of the transverse rods 3 of the storage tray 11 is performed by pushers, the latter receiving movement from the drive of the upper electrodes. For fixing the transverse rods 3, magnetic stops 14 are installed in the welding zone. The feed mechanism 6 of the longitudinal rods 4 consists of an endless chain 15, on which holders 16 and a spring-loaded pusher 17 are mounted. To communicate the chain 15 of the feed motion of the longitudinal rods 4, an actuator is provided. . The mechanism for feeding the longitudinal rods 4 to the lower electrodes 12 consists of receiving tubes 18 installed in the slots of the copiers 19 with the possibility of lateral movement from the actuator, for example, from the pneumatic cylinder 20 and fixed stops 21 installed at the required distance from the lower electrodes 12. In the initial position for receiving successive longitudinal rods 4, the receiving tubes 18 due to the curvilinearity of the slots of the copiers 19 are below the working surface of the lower electrodes 12. For the movement of the welded lattice, the mechanism of 8 step feeds It has seizures that are committed shuttle train (Up - forward - down - back), move the rack in sha.g for once welded a transverse rod. For quick removal of the Lattice after welding the last transverse rod into the mechanisms 9 for cutting off the ends of the transverse rods, the installation is equipped with rotating magnetic rollers 22. Receiving tubes 18 are shorter than the longitudinal rods 4 by two or three transverse rods 3. The operation of all installation drives is controlled by the control unit.

31

Installation works as follows.

Dimensional transverse rods 3 are laid in the bunker device 7, and the longitudinal rods 4 are transferred to the hopper devices 5, from where they are received into the storage trays 11 and 10, respectively. At the time of the start of the grate welding, the longitudinal rods 4 are in the receiving tubes 18, and their front the ends lie on the lower electrodes 12. When the upper electrodes 13 run upwards, the transverse rod 3 rises up from the storage tray 11 and is fixed in the welding zone by the magnetic stops 14. During the downward motion, the upper electrodes 13 press the transverse rod 3 to the longitudinal rods 4, including a transformer and welding occurs. During the course of the upper electrodes 13 upwardly, special grips of the mechanism 8 of the step-down feed of the grate move the grate one step beyond the welded transverse rod 3, while the longitudinal rods 4 move in the receiving tubes 18 and are not able to shift to the side and thereby disrupt the grid dimensions. As it goes down, the welding cycle of the next transverse rod 3 is repeated.

A few cycles before the end of the lattice welding, the longitudinal rods 4 with their rear ends emerge from the receiving tubes 18, after which the latter converge due to the operation of the pneumatic cylinder 20 to the initial position. The drive and the chain 15 actuates, moves, displaces with the help of the holders 16 fixed on it and the pusher 17 another longitudinal rod 4. The last front end enters the receiving tube 18 and with the spring-loaded pusher 17 is sent to the stop 21, after which the chain 15 receives the opposite from the drive movement and occupies the initial position, and the pusher pulls out of the tray-accumulator 10 the next longitudinal rod 4, which is placed on the holders 16.

The mechanism 6 for feeding the longitudinal rods 4 and to the other 712534 works similarly.

goy side install. The supply of the latter to the receiving tubes 18 up to the stops 21 is performed during the welding of the previous grid. Since the receiving tubes 18 in the initial state due to the profile of the grooves of the copiers 19 are below the level of the plane of the welded grid, the longitudinal bars 4 and 4 fed into the receiving tubes 18 do not interfere with the welding of the transverse rods 3 of the slide grid, although they are next to the lower electrodes 12. After welding the last transverse rod 4

t5 lattice, during the course of the upper

electrodes 13 up, grips of the mechanism 8 of the step-by-step supply of the grid move the grid to the step, with the front ends of the longitudinal rods

20 4 fall on the rotating magnetic rollers 22 and the welded lattice is quickly transferred to the cut-off mechanisms 8 of the ends of the transverse rods 3. At the same time, it

25. Pneumatic cylinder 20 and extends the longitudinal tubes 18 with the longitudinal rods 4 previously fed into them up to the lugs 4. Moreover, due to the profile of the grooves of the copiers 19, they are receiving

30, the tubes 18 are moved along a path that ensures that the front ends of the longitudinal rods 4, which are located therein, hit the working surface of the lower electrodes 12.

five.

Considering that longitudinal rods

4 served in the zone of the lower electrodes

12 during the welding of the previous grid, transversely to their last

Qn is performed almost instantaneously during the travel of the upper electrodes.

13to the top The presence of the stops 21 at the initial position of the receiving tubes 18 ensures that the same vypit will always

5 front ends of the longitudinal bars 4, which ensures the constant dimensions of the grids.

Use of the invention in contact welding of gratings from dimensional

0 rods running continuously and

provides high labor productivity.

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Claims (2)

1. INSTALLATION FOR CONTACT WELDING OF LATTICES, comprising upper and lower electrodes of welding heads mounted on the bed, hopper devices for transverse and longitudinal rods, feed mechanisms of transverse and longitudinal rods and a step feed mechanism of the grill, revealing that, in order to increase productivity for by ensuring the combination of the longitudinal feed of the longitudinal rods into the weld zone with the end time of welding of the previous lattice, it is equipped with a mechanism for lifting and lateral feed of the longitudinal rods to The lower electrodes of the assembly heads. 2. Installation according to claim 1, characterized in that the lifting and lateral feed mechanism of the longitudinal rods is made in the form of a copier with curved grooves and interconnected by means of a power cylinder, and installed in the grooves with the possibility of movement by tubes for placement of rods in them .