DE2611977A1 - DEVICE FOR CONNECTING BY WELDING - Google Patents

Description

Dr. Max Schneider

2 B1 1977 ^Dr - Alfred Eitel Di _Pl , i _ng

Ernst Czowalla Kfcüä! IPaiteinibsiiniwiyib ^ Peter Matschkur du

«Μ- κ _<MJ March 19, 1976

85 Nuremberg 106, Koenigstrasse 1 (Museum Bridge) Telephone collective no. 20 39 31

B Parking garage Katharlnenhof Parking garage Adlerstrasse «

this no. 27 432 / sf-t> ö

rirma 13Q [PAIAK, 35, rue du Professeur Galmette, 95240 GOFJISILIES-Bn-PARISIG / France

"Device for joining by welding"

The invention relates to a device for joining by welding, in particular for joining wire rings or bundles of rods in steelworks, consisting of a wire guide arranged on a machine bed that carries the Can completely enclose the object and is provided on its inside with a groove for the binding wire, which is at both ends extended by a miter gutter to accommodate the binding wire is, as well as from feeding devices to the binding wire in one of the grooves, then slide it into the groove of the wire guide until its free end reaches the other groove, with a first clamp to hold the free end in the corresponding channel while a pull is exerted on the other end,

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Deutsche Bank AG Nürnberg No. 03/30 688, BLZ 760 70012 - Hypobank Nürnberg No. 156/274 500, BLZ 760 202 14 Postal check account: Nuremberg Office No. 383 05-855 - Wire address: Norlspatent

to stretch the binding wire around the object, with a second clamp to hold the other end in the corresponding groove, after the wire has been cut to the desired length with the aid of a cutting device, and finally with electrodes in order to electrically weld the two ends of the connection thus established between the two terminals.

Currently, most of the metal wire joining devices make joints that are closed by twisting or deforming the ends. The tensile strength of this type of connection is seldom greater than 60 % of the tensile strength of the binding wire itself. Currently preferred devices for connecting which can close the connections made by them by welding. The tensile strength of the weld can be calculated so that it exceeds the tensile strength of the binding wire itself. Therefore, the connection point no longer represents a weak point of the connection and it becomes possible to reduce the cross-section of the binding wire for a connection with a given tensile strength, which results in a considerable saving in raw materials. In the pail of welded joints, it is no longer essential to use binding wire that has the plasticity necessary to deform it. The mechanical load-bearing capacity of the binding wire can therefore be increased without disadvantages, which offers a second possibility of reducing its cross-section for a given tensile strength of the connection.

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In the devices known today for joining by welding are the two guide troughs for the Sindedraht on each other movable elements are provided which make it possible to bring the two ends of the connection into contact in order to make it butt weld to each other or side by side. This arrangement of the channels on movable elements, however, leads to the fact that the device becomes very complicated, which increases its cost and is equally detrimental to safe working.

The invention has for its object to remedy these disadvantages, and therefore has for its object a device of the type mentioned above, which is essentially characterized by means to hold the crossed parts of the binding wire between the two retaining clips from the channels provided in a fixed position on the machine bed in order to bring them up to the level of the welding electrodes bring to.

These devices are preferably formed by two plungers, which penetrate under the action of an actuator into the interior of the channels through openings arranged in their bottom can.

With such an arrangement it is possible to use the ends of the binding wire to be set very precisely in relation to the welding electrodes by placing the ends at the height of the retaining clips more or are less folded to create a connection, the configuration of which is as good as possible to the object to be connected

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is adapted.

The device thus formed ensures because of its very simple Conception a very safe working, especially because of the fact that the channels are fixed and therefore ensure excellent guidance for the binding wire under all circumstances.

In a particular embodiment of the invention, the two rams attached to a shaft elastically attached inside a sleeve, with the sleeve sliding on the machine bed arranged and connected to an actuator and provided with a cam which at the end of the stroke with the welding electrodes cooperates to ensure that they are pressed against the ends of the binding wire to be welded. So devoted the various movements required to weld the ends of the joint automatically because of the simple nature of the movement existing control with an exact synchronization.

Further features, advantages and details of the invention emerge from the following description of a preferred embodiment as well as based on the drawing. Here show:

Fig. 1 is a front view of a device according to the invention;

FIG. 2 shows a section along line II-II in FIG. 1;

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Pig. 3 shows a detail in the direction of arrow III in Pig. 1;

Pig. Figure 4 is a top view of the central part of the device, in the direction of arrow IV in Pig, 1;

Pig. 5 one of the pig. 1 corresponding view, but with open wire guides;

Pig. 6 a section along line VI-VI in Pig. 4 with the cutting device open;

Pig. 7 one of the pig. 6 corresponding view with cut off Binding wire;

Pig. 8 shows a section along line VIII-VIII in Pig. 4;

Pig. 9 shows a section along line IX-IX in the Pig. 1 and 4;

Pig. 10 and 11 the Pig. 9 corresponding views showing the

Operation of the device according to the invention clarify;

Pig. 12 and 12 A the view of a welded connection

with parallel ends;

Pig. 13 and 13 A a welded connection with after

ends bent inside and

Pig. 14 and 14 A a welded connection with after

ends bent on the outside.

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-S-

The connecting device shown here initially has a Machine bed 1 on, on your at 4 and 5 two wire guides 2 and 3 are hinged in the form of semicircular arcs. These wire guides 2 and 3 are made with the help of actuators 6 and 7 actuated, which are articulated on the machine bed 1 at 8 and 9, and on the wire guides at 10 and 11, respectively, and can therefore both the closed position shown in Fig. 1 and that in Jig. 5 assume the open position shown.

Surrounded in the closed position shown in FIG the wire guides 2 and 3 the object to be connected 69 completely, the z. B. consists of a wire ring or a bundle of rods. This object rests on a working plane 70, which is arranged on both sides of the device. On the inside of the wire guides is a hat 12 with a rectangular Cross-section provided, which is shown in section in Fig, 2 and can accommodate a metallic binding wire, as shown at 68. The wire guides 2 and 3 are designed such that the axis of the Fut 12 in the plane X-X in Fig. 1 coincides with the plane VIII-VIII in Fig. 4, while in the plane X-Y in FIG. 1 the axis of the same Fut 12 coincides with the plane VI-VI in FIG. In the plane U-U in Fig. 1, which can also be the level in which the two .Drahteguides 2 and 3 meet, is the level of the hat .12 coincides with the axis Z-Z of FIG. 4, which shows the welding

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axis of the device "forms.

The feed device for the binding wire initially has a grooved wheel 14 which is directly on the axis of a not shown here Drive motor is arranged, which can rotate in both directions. This grooved wheel 14 acts with a Support roller 15 which rotates freely on an axle carried by a lever 16, one end of which is at 17 on the shaft 18 of an actuator 67 attached to the machine bed 1 is articulated. The other end of the lever 16 is arranged such that it slides on a guide 19 connected to the machine bed 1 (see Pig. 3). A return spring acts on this end 20, whereby the roller 15 is pressed evenly against the groove wheel 14.

In the pig. 6 and 7 it can be seen more clearly that the lever 16 also has a guide 21 for the binding wire 68, which extended by a shearing device formed from a movable jaw 22 and a corresponding fixed counterpart jaw 23 will. A spring 24 is provided to automatically readjust the play between the movable jaw 22 and the fixed jaw 23.

According to the invention, the groove 12 of the wire guides 2 and 3 is attached to / both ends of a guide trough mounted in a main piece 25, which is connected to the machine bed 1

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let and from one or more parts "can be ordered. The main part 25 has a first in fig. 4 and 6 visible F.inne, which extends the axis of the guide 21 between the ATd see before purely direction 22, 23 and the beginning of the wire guide 3 inclined is. The bottom of this channel 26 is provided with an opening that allows the passage of a plunger 27, its meaning becomes clear below. This channel 26 is also provided with a recess 28, which allows the passage of the shaft 29 an actuator 30 connected to the side 31 of the channel 26. This shaft 29 serves together with the opposite one Page 32 of the channel 26 as a retaining clamp for the binding wire.

The main part 25 has a second channel 33, visible in FIGS. 4 and 8, which is an extension of the exit of the wire guide 2 is inclined in the opposite sense. ¥ ie described above is the bottom of this channel 33 with an opening to Passage of a tappet 34 analogous to the tappet 27 of the channel 26 is provided. Likewise, a recess 35 is in the channel 33 for Passage of the shaft 36 of an actuator 37 connected to its side 38 is provided, the shaft 36 together with the opposite side 39 of the channel 33 serves as a retaining clamp.

In Figs. 9 to 11 two levers 40 and 41 can be seen which with the aid of an insulating piece 44 or 45 each carry an electrode 42 and 43, respectively. These levers 40 and 41 are open

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axles 46 and 47 connected to the part 25 are mounted and are held in the open position against the abutments 56 and 57 by a tension spring 48, the ends of which are fastened to the levers 40 and 41 at 49 and 50. Levers 40 and 41 carrying the electrodes are actuated with the aid of two cam profiles 72 and 73 which cooperate with ramps 60 and 61 on levers 40 and 41. These cams are carried by a sleeve 51 which is slidably arranged in the section 25 and is connected at its lower end to the shaft 52 of an actuator 53 attached to the machine bed 1. A sliding shaft 54 is arranged in the interior of the sleeve 51, the upper end 58 of which carries the two plungers 27 and 34. The shaft 54 is furthermore provided with a collar 62 which is normally pressed by a compression spring 55 against the underside 74 of an inserted section 66 . The spring 55 is supported at its lower end on a shoulder 63 of the sleeve 51, which leaves a part 64 with a reduced diameter in the sleeve 51, which serves as a guide for the lower end of the shaft 54.

The connecting device just described operates as follows ϊ

Initially, it is unwound from a reel (not shown) Binding wire 68 inserted into the groove of the motorized groove wheel 14, where it is held by the pressure roller 15, and then penetrates into the guide 21 and the shearing device 22, 23. The actuators 6 and 7 are withdrawn,

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so that the wire guides 2 and 3 are open, as in Figo is shown.

In this position, the objects to be connected 69 can easily be introduced into the interior of the device, where they lay down on the working plane 70, the axis of the connection in the plane IZ-IZ of FIGS. 1 and 4 must be. Since the Working level 70 is a simple resting surface for those to be connected Representing objects that may or may not be connected to the machine bed 1, the objects can be introduced from above, from the side or in the longitudinal direction. In the latter case, the wire guides 2 and 3 could also be implemented in a single piece that is firmly attached to the machine bed 1 is arranged, and the actuators 6 and 7 could be omitted, provided of course that it are long objects, such as bundles of bars, rather than rings of wire. If necessary, the option can also be used a displacement of the device relative to the objects can be provided.

Once the items are in place, the actuators 6 and 7 extend, leaving the wire guides 2 and 3 around their axes 4 and 5 pivot. These take up the position shown in Fig. 1 and surround the to be connected Item 69 complete. The grooved wheel 14 is then set in clockwise rotation and thus pushes the Tie wire 68 into the first channel 26 of the main part 25, then

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into the hat 12 of the wire guides 2 and 3, and finally into the 'second groove 33, up to the moment when its end abuts against the end 71 of this groove 33 and so the rotation of the grooved wheel 14 blocked. The binding wire is now applied to the bottom of the hat 12 and the gutters 26 and 33 and takes particular precedence the shaft 36 of the actuator 37 over. As soon as this is actuated, he presses the binding wire against the side wall 39 of the Groove 33 at the level of the recess 35. The grooved wheel 14 is now set in reverse rotational movement and thus exercises on the Binding wire 68 from a train that lets it step out of the hat 12 of the wire guides 2 and 3. So he is tightening up and after and for the purpose of pulling around the object to be connected 69, and the actuator 30 is actuated so that the end its shaft 29 presses the binding wire against the side wall 32 of the channel 26 at the level of the recess 28. The binding wire 68 is now correctly laced around the object 69 to be connected and is in this position by the two of the actuators 30 and 37 formed retaining clamps held, which press its ends in the corresponding grooves 26 and 33, respectively.

The shaft 18 of the actuator 67 is then withdrawn, as a result of which the lever 16 pivots about the support roller 15. Then the binding wire 68 is cut between the movable jaw • and the fixed jaw 23 of the cutting device, as can be seen from FIG. The actuator 53 is then extended, which causes the sleeve 51 to extend with the it is connected to its shaft 52. Initially, the

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Displacement of the sleeve 51 only has an effect on the position of the plunger 27 and 34 carried by the shaft 54, namely via the leather 55. The plungers 27 and 34, which may consist of insulating material or simply coated with such a material can be, so press transversely through the corresponding openings arranged in the bottom of the channels 26 and 33 against the ends of the binding wire 68 located in these grooves. The ends now bend at the height where they are removed from the clamps 30 and 37 are held, gradually emerging from the gullies in which they were before. This movement continues until the upper end 58 of the shaft 54 abuts against a surface 59 of the main part 25, which can be seen in FIG is. ! Do is the one in Pig. 10 position shown reached.

In the example described here, the parts 58 and 59 are calculated in such a way that when stopping the plunger 27, 34 supporting Shaft 54, the ends of the binding wire are exactly at the level of the welding electrodes 42 and 43 and are parallel are as shown in Figures 12 and 12A. Of course, the parts 58 and 59 can also be designed in this way be that the ends of the binding wire exceed this parallel position, as can be seen from Figures 13 and 13A. In this case, the position of the electrodes 42, 43 would have to be adjusted so that the outer or inner crossing of the binding wire always happens in their height. As soon as the shaft 54 strikes against the section 25, as shown in FIG. 10 is, get .die cam profiles 72 and 73 in contact with the

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Ramps ΰθ and 61 of the levers 40 and 41 carrying the electrodes. As the sleeve 51 is pushed further upward by the shaft 52 of the actuator 53, the cams 72 and 73 leave the levers 40 and 41 pivot about their axes 46 and 47, causing the electrodes 42 and 43 are pressed against the two ends of the binding wire, as is evident from "Pig. 11. In the course of this l / pus movement of the sleeve 51, the shaft 54 remains immobile, and therefore the spring 55 is placed between the collar 62 and the shoulder 63 compressed. At the same time, the tension spring 48 is due to the pivoting of its fastening points 49 and 50 pulled apart. The electrodes 42 and 43 now press on the two ends of the binding wire with a force that is determined by the Difference between the force delivered by the shaft 52 of the actuator 53 and that for compressing the spring 55 and the pulling apart of the spring 48 necessary force is determined. This pressing force is maintained for the entire duration of the application by electrical welding current applied to the electrodes for a predetermined adjustable period of time is created with the help of a device not shown. After switching off the welding current, the pressing force the electrodes may be retained for a certain period of time before the shaft 52 of the actuator 53 again is withdrawn. Under the action of the welding current, the two ends of the binding wire 68 are through a welding point ■ 13 connected to one another (see FIGS. 12 A to 14 A). The binding wire 68 now forms around the object 69 an effective

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-H-

welded connection, which has a high tensile strength, so that the holding clamps 30 and 37 holding its ends are no longer needed and can therefore be released.

The retraction of the shaft 52 is initially due to the downward movement the cams 72 and 73 and the pivoting of the levers 40 and 41 carrying the electrodes under the action of Each 48 unlocks the electrodes 42 and 43. Simultaneously The spring 55 relaxes inside the sleeve 51. As soon as the levers 40 and 41 strike against the abutments 56 and 57, the electrodes 42 and 43 are opened again, and at the same time the underside 74 of the insert 66 abuts the Sleeve 51 against the collar 62 of the shaft 54. The shaft 52 of the actuator 53 looks further back, and that of the sleeve 51 and the unit formed by the two tappets 27 and 34 carrying the shaft 54 follows until it is again the one shown in FIG. 9 Assumes position in which the rams 27 »34 their guides arranged in the bottom of the grooves 26 and 33 of the main part 25 again take in. The actuators 6 and 7 are then retracted, whereby the wire guides 2 and 3 open again. The connecting cycle is now over, and the connected object 69 can be taken from the corresponding devices of the device in order to be connected to a new object to be replaced.

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Claims (3)

PASEHT INSPECTION 1.J device for joining by welding, in particular for connecting wire rings or bundles of bars in steelworks, consisting of one on a machine bed arranged wire guide, which can completely enclose the object to be connected and on its inside is provided with a fat for the binding wire, which is at both ends of a guide channel for receiving the binding wire is extended, as well as from feeding devices, around the binding wire in one of the grooves, then in the hat of the wire guide until its free end goes into the other channel, with a first clamp around the free end in the appropriate groove while pulling on the other end to pull the binding wire around the To clamp the object with a second clamp to hold the other end in the corresponding groove after the wire in the desired length with the help of a viewing device was cut off, as well as finally with electrodes to the two ends of the connection so made to be electrically welded between the two terminals 609843 / 03U 1 / * ο - Ben, identified by. Drawbars, around the crossed parts of the binding wire (68) between the two retaining clips (30, 37) from the fixed position to pull out the grooves (26, 33) provided on the machine bed (1), to bring them to the level of the welding electrodes (42, 43). 2. Apparatus according to claim 1, characterized in that these pulling devices are formed by two plungers (27, 34) are which under the action of an actuator (53) into the interior of the channels (26, 33) through arranged in the bottom Openings can penetrate. 3. Apparatus according to claim 2, characterized by the attachment the two plungers (27, 34) on a shaft (54) which is elastically attached inside a sleeve (51), which slide on the machine bed (1) and connected to an actuator (53) and a crouch (72, 73) is provided, which cooperates at the end of the stroke with the welding electrodes (42, 43) in order to press them against the to ensure welded ends of the binding wire (68). R 0 9 8 4 3/0 3 U