SU1743763A1 - Apparatus for resistance spot welding of grates - Google Patents

Description

Fig, 1 shows a General view of the proposed device: in Fig.2 - the hopper of the transverse rods; on fig.Z - the bunker of longitudinal cores; figure 4 is a diagram of the filing of the longitudinal rods; figure 5 - diagram of the process of loading the transverse rods into the grooves of the chain with a cutter; Fig. 6 is a diagram of the interaction of the cams with the lever of the sluice; Fig. 7 is a diagram of the advancement of a longitudinal rod by a tooth; Fig. 8 is a kinematic diagram of the interaction of the main conveyor with a hook of the auxiliary circuit; Fig. 9 is a diagram of the drive of the main conveyor through a Maltese cross.

The installation consists of the following main components and parts. On the base 1, consisting of two interconnected frames, two parallel plate conveyors 2 are mounted, passing between the upper and lower electrodes of the welding device 3 and intended for receiving and transporting the transverse rods. For this, the outer plates are made of two types: with a groove for transverse rods and alternating with them without a groove, performing the functions of a cutter of a column of rods (surface A in Fig. 2). The inner plates of the chain are lower than the outer ones: this is done in order to ensure that the rod gets into the groove, taking into account the non-ideal straightness of the rod. For tensioning the chains, mechanisms 4 are mounted on each frame. The shafts of the conveyor are mounted in bearings-5 fixed to the frame 1.

The conveyor chain is moved by sprockets b, and they can move along the shaft and stop depending on the length of the transverse rods. In order to grip and advance the longitudinal rods next to the main chain of the conveyor, a chain drive 7 is additionally mounted, made of a standard chain, on which, at appropriate intervals at the junction points of the links, hooks are fixed, which contact the ends of the outer plates of the conveyor. In addition, the teeth 8 are also rigidly fixed to the links of the auxiliary chain, directly pushing forward the longitudinal rod together with the grid formed on the conveyor belt.

To prevent the conveyor chain from sagging and, consequently, ensuring that the rod gets into the groove, the guides 9 are mounted on the frame under each branch. The conveyor chain and the auxiliary chain move synchronously. Also on the frame are firmly fixed bunker 10 and 11

respectively transverse and longitudinal rods. The bunker of the transverse rods (Fig. 2) consists of inclined trays 12, passing into vertical guides.

To continuously push the rods into the vertical guides and prevent them from jamming over the trays, two on one shaft of the agitator disk 13 are mounted, rotating in the opposite direction of the rods. The gap between the bottom of the tray and the edge of the agitator disc is set so that only one layer of rods can pass under it. For the same purpose

5 serves also as a stopper. The transition from the inclined surface of the tray to the vertical guide, as well as the lower contours of the stopper, are made with rounding, which also prevents jamming. For

In order to align the transverse rods at the end and to eliminate the technological ends along the bunker, there is a bar 15 (FIG. 3). The bunker of longitudinal rods (Figs. 3 and 4) also has inclined trays from a disk 5 with agitators, passing into vertical guides, in which longitudinal rods are placed in one row, forming a column of blanks 16, the lower rod lies at the ends of transverse billets 17 and

0 on top pressed to them with the stiffness of a column of longitudinal rods. On the top, the rods on the front are limited by an abutment so that the output has only the lowest one.

Figure 5 is a diagram of the device and

5 The mechanism provides for the supply of two transverse rods to the welding electrodes at once. The mechanism consists of a lever 18, pivotally fixed at one end, and the other, bevelled end, interacting with cams 19 mounted on sprockets of the conveyor chain with an interval of two steps of the chain. Lever 18 lies on the bottom of the stopper 20. Figure 6 shows the same mechanism along arrow A, i.e.

5 from the end.

Figures 7 and 8 show a diagram of the interaction of the conveyor circuit with the auxiliary circuit. This occurs through the hook 21, which comes into contact with the end face

0 conveyor plates, whereby the auxiliary circuit moves forward synchronously with the main circuit.

Figure 9 shows a diagram of the drive of the main conveyor chain through the carrier,

5, located on the output shaft of the gearbox, and the Maltese cross rigidly mounted on the same shaft as the sprockets of the conveyor chain.

The device works as follows.

The rods of measured length are loaded into the bunkers 10 and 11. From the drive through the Maltese cross and asterisks 6, the chain-conveyor begins to move. In this case, the rods transverse in the vertical guides are kept at rest by the surface A of the chain links (Fig. 2). Fig. 5 shows that when moving to a new position (i.e., free slots, respectively, d and e, under the guides a and b), in order to prevent the rod from moving b into the groove g, the lever 18 under the action of the cam 19 props the rods in the rail b below. When the conveyor is stopped, the cam 19 is lowered downward, respectively, lowered to the stop 20 and the lever 18. The slots of the plates are free and filled with transverse rods. Then the cycle is repeated. With further advancement of the conveyor with a set of transverse rods, it approaches the bunker of the longitudinal rods 11. Here, a chain drive 7 (FIG. 4 and FIG. 7) comes into effect, which by contacting the hook 21 with the ends of the main chain plates (FIG. 8) is carried forward, and tooth 8, acting at the end of the lower longitudinal rod, advances it along with the transverse, forming a grid, which falls under the welding electrodes. The up and down movement of the electrodes is automatic and synchronized with the pulsing movement of the conveyor circuit. The asterisk 6 is driven into rotation by an electric motor through a worm gear and a Maltese cross, which is rigidly mounted on the same shaft with it (Fig. 9). The Maltese cross, calculated appropriately, provides pulsating (stepping) movement of the conveyor by two lattice steps. The welding of the rods (the movement of the electrodes downward) is carried out at the moment when the conveyor is stopped: as the latter moves forward, the electrodes rise. The welded grille is removed from the conveyor and placed in a container.

The application of the invention in comparison with the base sample provides a number of advantages: it increases the productivity of the equipment by providing feed and simultaneous welding of several transverse rods: it simplifies the design of the device, since elements such as electric vibration hopper, pneumatic cylinder, etc .; accordingly, the reliability of the device operation also increases.

Claims (2)

1. Device for contact point welding lattices from rods of a smooth profile of measured length, containing loading devices placed on the frame for transverse and longitudinal rods, welding device, feed mechanism longitudinal rods to the welding zone, a feed mechanism for transverse rods to the welding zone, made in the form of a conveyor with grooves for placing rods, a step-feed mechanism, characterized by that, in order to increase productivity, simplify construction and increase reliability, it is equipped with additional loading devices for transverse rods and corresponding the number of additional welding devices, the distance between the loading devices for transverse rods is equal to the slot position of the grooves on the conveyor, made in the form of two closed chains with non-driven and driven sprockets, the longitudinal rods feed mechanism is kinematically connected with the transverse rods feed conveyor and equipped with teeth for interaction with longitudinal rods, the drive sprocket is kinematically connected with the stepper feed drive and is supplied mounted on its end evenly around NOSTA with pitch corresponding to the distance between the loading devices, cams, rods transverse feed mechanism E is provided with a stripper in the number of additional loading devices, each of which is in the form vozmozhkostyu mounted with limited rotation and engagement with the cams mounted on the sprocket, the lever. 2. The device according to claim 1, characterized in that the longitudinal feed mechanism rods made in the form of a closed drive chain. FIG. one l {{fFbJ / ЈX .. FIG. 2 Fig.Z FIG L g ((| .... tfl.flf WTw vgTy.gLJS Auda FIG B 15/ Fig FIG. 7 FIG. eight eight M & Lypiska Fig.9