RU2376115C2 - Device for continuous production of flat nets - Google Patents

Abstract

FIELD: welding.

SUBSTANCE: invention refers to device used for production of flat nets and is designed for welding of nets of 0.2-5 mm wire, and up to 2.5 m wide in construction industry, as well as for production of quality products from the net in furniture trade. Weft wire supplying mechanism of the device consists of carriage for receiving and cutting weft wire and magnetic pick-and-place mechanism for moving weft wire to welding position. Carriage is installed on the base of welding machine and includes two side walls wherebetween a beam is rigidly fixed, and receiving shaft is installed on walls so that it can be rotated. Rolling supports are installed on carriage side walls to provide movement of carriage along guides of welding machine base. On one of the above side carriage walls there installed is initial position sensor of receiving shaft, which is equipped with longitudinal guide slots made of hardened inserts for receiving weft wire. On the beam there rigidly fixed are restricting plates with semi-rings. Edges of plates are located opposite one of longitudinal slots of receiving shaft and comprise weft wire receiving channel, and semi-rings are installed coaxially to receiving shaft and intended for retaining weft wire in slots when receiving shaft is turned. On beam there installed with possibility of longitudinal movement is sensor indicating that weft wire is in the channel, and shears with drive for cutting weft wire are fixed. Magnetic pick-and-place mechanism is installed on welding machine base and includes two racks on each of which brackets are fixed, and in brackets on axes there installed are housings in which pins are rigidly fixed on both sides. Pins are installed on one side of housing in vertical position and on them there fixed with possibility of being adjusted as to height is beam with levers-catchers, which is located parallel to receiving shaft. Levers-catchers are located opposite longitudinal unloading slot of receiving shaft and on them there installed are constant magnets which are protected with hardened patches, and free ends of pins on the other side of the above housings are rigidly connected to forks which are hinged to levers, the other ends of which are fixed so that they can be rolled on beam with upper electrode blocks.

EFFECT: enlarging functional capabilities by increasing width of welded net at maintaining high quality.

9 dwg

Description

The invention relates to myoelectrode welding machines and is intended for welding high quality mesh of wire with a diameter of 2-5 mm, which can used in the construction industry, as well as for the production of high-quality mesh products in the furniture industry.

A known machine (1) for the contact spot welding of wire nets, where a rotary shaft is used as a feed mechanism for the transverse wire, at the ends of which cam mechanisms are provided to receive, clamp and rotate the wire 90 ° to the welding position. The disadvantage of this device is the rigidity of the structure. The machine does not allow to change the step of the mesh web along the length, there is no adjustment of the mesh width, in addition, it is impossible to weld a thin wire.

A known machine (2) for the manufacture of gratings, which contains a device for the transverse feed simultaneously of two parallel wires to the welding position. The advantage of the machine is that it provides mechanisms for regulating the width of the mesh to be welded. The transverse wires through the nozzles are pushed into the lodges between the plate and the shutter, then the system of pivoting levers is triggered, while at first the mechanisms clamp the transverse wires, and then transfer them to the welding position. The authors created complex mechanisms to ensure a given trajectory of movement of the wires, but nevertheless the wires sway with a large width and additional mechanisms for tensioning the wires are provided to prevent swaying. Its main disadvantage is the complexity of the design, which consequently implies the high cost of the machine.

The closest analogue is a device for the continuous manufacture of flat grids (3). The device comprises upper and lower electrode blocks with electrodes mounted on the base of the welding machine, a mechanism for incrementally feeding longitudinal wire. The piecewise transverse wire feed mechanism comprises feeder and magnetic catcher assemblies rigidly mounted on the base on opposite sides of the lower electrodes. The feeder contains a hopper for the transverse wires, which is connected to the entrance of the slit-like guide channel. At the exit of the specified channel, a wire cutter is installed in the form of a gate connected to the pneumatic cylinder. The magnetic catcher is made in the form of magnetic blocks fixed in grooves on a common bracket. Each magnetic block contains a permanent magnet, the opposite faces of which are covered by a magnetic circuit, and the poles of the magnetic circuit are made in the form of plates. The vertical end surfaces of these plates are installed in one row on the welding line and are placed between the lower electrodes.

The device provides high-quality welding of a mesh of wires with a diameter of 2-4 mm and a width of the mesh web up to 1 m, while it is possible to smoothly control the nodes of the device in order to increase the width of the welded mesh web.

However, the existing design does not significantly increase the width of the welded mesh up to 2.5 m due to the high flexibility of thin wires, which leads to their jamming in the hopper, as a result of which the feed cycle of the transverse wire is disrupted. The known design works well on thin wires with a diameter of 2-3 mm with a length of up to 1 m, but with an increase in the length of the wires, failures occur in the hopper feed, and therefore, in the operation of the line.

The essence of the invention lies in the fact that in the known device for the continuous manufacture of flat grids, comprising lower and upper blocks with electrodes mounted on the base of the welding machine, a step-by-step feed mechanism of a longitudinal wire, a cross-wire feed mechanism including a magnetic catcher made in the form of magnetic blocks fixed in grooves on a common bracket, each magnetic unit containing a permanent magnet, the opposite faces of which are covered by a magnetic circuit, and the poles of the magnetic circuit in are filled in the form of plates, the vertical end surfaces of which are mounted in a row on the welding line and placed between the electrodes, and the carriage for receiving and pieces of the transverse wire and a magnetic shifter for transferring the transverse wire to the welding position are reintroduced into the transverse wire feed mechanism the introduced carriage is mounted on the base of the welding machine and contains two side walls between which a beam is rigidly fixed, and a receiving shaft is mounted rotatably on the walls, and on one a sensor for the initial position of the receiving shaft is installed from the side walls of the carriage, and to ensure the carriage moves along the guides of the welding machine frame, rolling bearings are installed on the side walls of the carriage, while the receiving shaft is equipped with longitudinal guide grooves made of hardened inserts for receiving the transverse wire, except Moreover, limiter plates with half rings are rigidly fixed on the beam, while the ends of the plates are placed opposite one of the longitudinal grooves of the receiving shaft and organize a channel for receiving the transverse wire, and the half rings are mounted coaxially with the receiving shaft and serve to hold the transverse wire in the grooves when the receiving shaft is rotated, in addition, the transverse wire presence sensor in the channel is mounted with the possibility of longitudinal movement and the scissors with the drive for cutting the transverse wire are fixed, in addition , the newly introduced magnetic shifter is installed on the base of the welding machine and includes two racks, on each of which brackets are fixed, and in the brackets on the axles are mounted in which fingers are rigidly fixed on both sides, and on one side vertically mounted fingers are fixed with a possibility of height adjustment of the beam, which is parallel to the receiving shaft and equipped with gripping levers, permanent magnets are mounted on them, which are protected by hardened overlays, the gripping levers are located opposite the unloading longitudinal groove of the receiving shaft, and fingers are also installed on the other side of the above bodies, their free ends are rigidly connected to the forks, after the bottom pivotally connected to levers, the second ends of which are mounted with the possibility of swinging on the beam with the upper electrode blocks.

Compared with the prototype, the authors proposed a new technical solution of the device for the continuous production of flat grids, in particular, changes relate to the feed mechanism of the transverse wire.

From the known device in the mechanism of piecewise supply of the transverse wire, the authors excluded the feeder assembly for the piecewise separation of the transverse wire. Use in an analogue of the feeder provides for loading with pre-peaked wire. It is proposed to replace it with a carriage for receiving, pieces of wire and a magnetic shifter for transferring the transverse wire to the welding position.

The newly introduced nodes make it possible to automatically accept a wire with a diameter of 2-5 mm and a length of up to 2.5 m with high speed. In an analogue, the operation of refueling the hopper with a preliminary straightened wire with a diameter of 2-4 mm and a width of up to 1 m was carried out manually, which significantly reduced the functionality of the entire device.

In the proposed device, due to the introduction of a receiving shaft in the carriage, it became possible to smoothly adjust the width of the mesh web. The wire is fed into the closed channel to a predetermined length, and from the channel, the transferr, thanks to the presence of magnets in it, transfers the wire to the welding line, where it is held by the magnets at the welding position. Thus, the high quality of the welded mesh is maintained. This is especially important when working with small-diameter wires, which are most often used in the manufacture of nets for the furniture industry, where one of the main requirements is high quality products.

As you can see, the newly introduced nodes, their relationship and relative position allowed the authors to obtain a new technical result, which consists in expanding the functionality by increasing the width of the welded mesh and maintaining high quality.

Figure 1. Shows a general view of the device.

Figure 2. View A in figure 1 on the carriage for receiving and pieces of transverse wire.

Figure 3. Sensor initial position of the receiving shaft.

Figure 4. View B in figure 2 on the carriage. Figure 3. Section BB in FIG. 2.

6. The shifter in the receiving position of the transverse wire from the guide groove.

Figa. The shifter in the extreme position after transferring the transverse wire to the welding position.

A device for the continuous production of flat grids comprises lower and upper electrode blocks with electrodes mounted on the base 1 (Fig. 1) of the welding machine, a step-by-step feed mechanism for the longitudinal wire 2, a cross-wire feed mechanism, including a carriage 3 for receiving and pieces of the cross-wire and a magnetic shifter 4 for transferring the transverse wire to the welding position.

The carriage 3 for receiving and segments of the transverse wire contains two side walls 5 (figure 2), between which the beam 6 is rigidly fixed, on the side walls 5 of the carriage, a receiving shaft 7 is mounted for rotation. Also on the side wall of the carriage (figure 3) is installed a sensor 8 of the initial position of the receiving shaft 7. On the side wall of the carriage 5 (figure 4) mounted rolling bearings 9 to move the carriage along the guides of the base of the welding machine. The carriage can be moved from the working position to the non-working position to allow access to the electrodes of the welding machine and to the levers of the shifter to adjust the device. In both positions, the carriage locks. The receiving shaft 7 (figure 2) is equipped with longitudinal guide grooves 10 made of hardened inserts for receiving the transverse wire. The limiter plates 11 with half rings 12 are rigidly fixed to the beam 6 (FIG. 3). The ends “a” of the limiter plates 11 are located opposite one of the longitudinal grooves “b” of the receiving shaft 7 and form a channel for receiving from the straightening unit and supplying the cross wire . The half rings 12 are mounted coaxially with the receiving shaft and serve to hold the transverse wire in the grooves when the receiving shaft is rotated. A sensor 13 (Fig. 2) of the presence of a transverse wire in the channel is fixed on the same beam. On the beam 6 there are scissors 14 with a drive 15 for cutting the transverse wire.

The shifter is installed on the basis of the welding machine 1 (Fig.6). It includes two racks 16, on each of which a bracket 17 is fixed, and in the brackets on the axes there are housings 18, in which the fingers 19 and 20 are rigidly fixed on both sides. On one side, the vertically arranged fingers 19 are fixed with the possibility of adjustment the height of the beam 21, which is parallel to the receiving shaft 7. The levers-grips 22 are fixed on the beam. Permanent magnets 23 are attached to their ends, which are protected by hardened plates 24, while the levers-grips 22 are located opposite the unloading groove “in” the reception of the shaft 7. On the other side of the above housings, fingers 20 are also mounted, their free ends are rigidly connected to the fork 25, the fork, in turn, is pivotally connected to the lever 26, the second end of which is fixed with a possibility of swinging on the beam 27 with the upper electrode welding blocks cars.

A device for the continuous manufacture of flat mesh works as follows.

The longitudinal wire is cyclically fed by the step feed mechanism 2 (Fig. 1). The transverse wire in the same cycle is fed to the welding position by means of a transverse wire feed mechanism including a carriage 3 and a magnetic transfer 4.

The transverse wire enters the carriage, which provides reception, cutting and wire feed to the shifter. Before starting work, the carriage is installed on the base of the welding machine in the working position and fixed in this position. The first wire in the setting mode is fed into the channel "b" (Fig.5) of the receiving shaft 7. The shaft rotates 90 °. Next, the work goes in an automatic cycle.

The wire is fed into the channel "b" (figure 5) of the receiving shaft 7. In this case, the position when the longitudinal guide groove is ready to receive the wire is controlled by the sensor 8 (figure 3).

The sensor for the presence of the transverse wire in the channel 13 (Fig. 2) is triggered and gives a signal to the drive 15 to turn on the scissors 14. The wire fed into the channel of the carriage shaft is cut off. The shaft rotates 90 ° and stops.

The wire is held in the groove when it is rotated thanks to the limiter plates 12 (Fig. 5). At this point, the shift arms are located at the carriage shaft.

The shifter receives the wire from the discharge groove "c" of the receiving shaft 7 (Fig.6) due to the presence of magnets 23, protected by plates 24, which hold and transfers it to the welding line "g" of the lower welding electrodes (Fig.6a).

The initial position of the shifter is shown in (Fig.6). Its working cycle through a system of levers is tightly coordinated with the movement of the beam with the upper electrode blocks 27. The beam 27, dropping down, presses on the levers 26, which move the forks 25, and they press down on the fingers 20, while the housing 18 rotates around its axes and the beams 21 are deflected through the fingers 19. In this case, the gripping levers 22, equipped with permanent magnets 23 with hardened plates 24, grasping the transverse wire from the discharge groove “c” of the receiving shaft 7, transfer it to the welding position “g”, where it is held by fixed magneticcatchers. The shifter takes an extreme position after the transfer of the transverse wire (figa).

The proposed device has been tested on multi-electrode welding machines and has shown reliable operation and high productivity in the production of masonry and luxury mesh.

The device was implemented in an automatic line LTS-1500R2 for welding a rolled mesh of wire with a diameter of 2-3 mm at the enterprise Prominvest CJSC in Orel.

The following parameters were achieved:

- when welding a mesh of wire with a diameter of 2 mm, 80 cycles per minute or 240 linear meters. meters per hour;

- when welding a mesh of wire with a diameter of 3 mm, 60 welding cycles per minute or 180 linear meters. meters of mesh per hour.

The manufacturer notes the high quality of the mesh and the reliability of the implemented equipment.

Two automatic new welding lines LTS-1000K2 and LTS-2000K2A are being prepared for implementation, producing a grid in the form of cards, respectively, 1 and 2 m wide.

At present, a line with a width of a net web of 2.5 m is at the testing stage.

List of references

1. A.s No. 1355406, announced March 11, 86, published November 30, 87, V23K 11/10. The machine for contact spot welding of wire mesh.

2. Patent No. 2008155, filed January 23, 91, published February 28, 94, B23K 11/00. Machine for the manufacture of gratings.

3. Patent No. 2251475, filed September 18, 2003, published May 10, 2005, B23K 11/10, B21F 27/10, B23K 101: 22 (prototype). Device for the continuous manufacture of flat nets.

Claims (1)

A device for the continuous production of flat grids, comprising lower and upper blocks with electrodes mounted on the base of the welding machine, a mechanism for stepwise feeding of a longitudinal wire, a mechanism for feeding the transverse wire and magnetic catchers, characterized in that the mechanism for feeding the transverse wire consists of a carriage for receiving and segments of the transverse wire and magnetic shifter for transferring the transverse wire to the welding position, while the carriage is mounted on the base of the welding machine and contains two side walls between which the beam is rigidly fixed, and a receiving shaft is mounted for rotation, and rolling bearings are installed on the side walls of the carriage to ensure that the carriage moves along the guides of the base of the welding machine, and a receiving position sensor is mounted on one of the mentioned side walls of the carriage shaft, which is equipped with longitudinal guide grooves made of hardened inserts for receiving the transverse wire, restrictor plates with half rings are rigidly fixed to the beam ami, and the ends of the plates are located opposite one of the longitudinal grooves of the receiving shaft and form a channel for receiving the transverse wire, and the half rings are installed coaxially with the receiving shaft and are designed to hold the transverse wire in the grooves when the receiving shaft is rotated, the transverse presence sensor is mounted on the beam with the possibility of longitudinal movement wire in the channel and scissors with a drive for cutting the transverse wire are fixed, the magnetic shifter is installed on the base of the welding machine and contains two racks, each from which the brackets are fixed, and in the brackets on the axles there are housings in which fingers are rigidly fixed on both sides, and the fingers on one side of the housing are vertically mounted and a beam with levers-grips that is parallel to the receiving shaft is fixed with height adjustment , the gripping levers are located opposite the unloading longitudinal groove of the receiving shaft and they are equipped with permanent magnets that are protected by hardened overlays, and the free ends of the fingers on the other side are higher associated housings rigidly connected to the forks, which are articulated to the levers, the other ends of which are fixed pivotably on the beam with the upper electrode blocks.

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