DD200996B1 - CIRCUIT ARRANGEMENT FOR FOLLOWING CONTROL OF DRIVES FOR AUTOMATIC WELDING SUPPLY - Google Patents

Description

Title of the invention

Circuit arrangement for the subsequent control of drives for automatic welding material supply

Field of application of the invention

The invention relates to a circuit arrangement for the folklike control of drives for the automatic Schweißgut supply in connection with the welding machine and the electrode pairs.

Characteristic of the known technical solutions

Circuit arrangements are known in which the subsequent control of the drives by means of contactors or elements of the power electronics, or the programmed sequence of internal processes, as in welding machines, the pre-and post-hold time, the welding time and the control of the electrodes, by elements of microelectronics is realized. In this case, amplifier elements are required as output or transition links to the power part. The combination of welding machine controls and drives with their respective specific circuitry for the realization of complex technological processes, with subsequent reinforcement directions and processes and taking into account time-related, so-called discrete processes to realize the specified welding parameters, require a further effort of components for their mutual adaptation , Linking and locking.

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Depending on the degree of linkage, electronic or contact-type components are used for this purpose, the scope of such switching arrangements often being greater than that of all drives and machines belonging to the process.

Object of the invention

By the invention, a circuit arrangement is to be created in which the disadvantages of the prior art by reducing the required components while increasing the reliability at relatively short switching times, are eliminated.

Explanation of the essence of the invention

The object of the invention is to provide a circuit arrangement for the follow-on control of drives for the automatic welding material supply, in conjunction with the welding machine and their electrode pairs, which are each assigned initiators, with which it is possible, regardless of the number of individual to actuated electrode pairs, the welding tact selection and the link between the welding machine controls and the drive control for the welding material supply to realize with a minimum amount of components and the same circuit scale.

According to the invention, this object is achieved in that all relays connected in series of Umsehaltkontakte the actuated by the initiators relay a relay for driving the Schweißgutzuführung energized via a diode and a storage relay simultaneously via a diode in conjunction with its series resistor by the so-applied inverted Signal is held in its rest position, and all parallel connected operating positions of the same changeover contacts a start relay for the welding machine controls is energized and that all connected in series rest positions of changeover contacts belonging to the welding machine controls relays and in series with a normally open contact of the storage relay and Prepared via a diode, the holding circuit for the relay for driving the Schweißgutzuführung, and at the same time via a diode, the start relay in conjunction with its series resistor by the applied inverted signal in his Rest position is held and over the

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parallel operating positions of Umsehaltkontakte belonging to the welding machine controls relays and the storage relay energized via a diode, its holding circuit closed via its own working contact and simultaneously shut off the relay for driving the Schweißgutzuführung via a diode in conjunction with its series resistor by the so-applied inverted signal and is held in its rest position, and further that each associated with the welding machine controls relay is energized via normally open contacts of the respective associated initiator operated relay in series, each with a normally open contact of the start relay for the welding machine control.

embodiment

The invention will be explained in more detail below using an exemplary embodiment.

The accompanying drawings show:

Figure 1: circuit diagram of the circuit, Figure 2: the switching sequence table.

The circuit is drawn in the dead state.

The basis for the switching sequence of the circuit arrangement is the not shown mode of action of the information acquisition by the initiators in the welding material supply and working as separate functional units welding machine controls.

The initiators are the subject of a device for receiving and supplying rods for welding reinforcing mats and ladders with variable spacing of the longitudinal and transverse bars. They are used to position the weld metal in the axis of the electrode pairs and are operated by Ueßfahnen which are attached to the mobile device. Sin Initiator is assigned to a pair of Slektroden. The positions of the Ileßfahnen serve as information carrier whose detection is carried out by the initiators, wherein via the circuit arrangement, the shutdown of the drive for the welding material supply and the selection of the respective Slektrodenpaares for the welding cycle takes place. The Slektrodenpaare are controlled independently of each other, for their stroke solenoid valves are operated.

By closing the normally open contacts к 3 and kl 1 for the welding machine control SM 1, or the working contacts к 3 and ki 2 for the welding machine control SM 2, the programs run independently of each other, according to the set parameters.

The program starts with the lowering and ends with the lifting of the electrode pairs. The relays Ks 1 and Ks 2 switch the solenoid valves of the respective electrode pairs, their position is equivalent to the electrode position. A renewed start for the welding machine controls SM 1 and SM 2 can be made only after previous opening of the exciter circuit by the working contacts к 3 or ki 1, or к 3 or ki 2 · After the start command for the welding machine controls, the program flow is therefore independent of the position of the working contacts к 3 »ki 1 or ki 2.

If there is no measuring vane in the measuring range of the initiators, the normally closed contacts ki 1 and ki 2 of the relays to be actuated by the initiators are closed ·

From P via the normally closed contacts ki 2, ki 1, diode V 3, the relay K 1 is energized for the welding material supply, whose work contact к 1 turns on the drive M for the welding material supply. Thus, the measuring flags are driven one after the other and according to their position in the measuring range of the initiator in question.

If this information is detected by the first initiator, the associated relay is energized and the normally open contact ki 1 closes and switches on the present normally closed contact ki 2, the start relay K 3 for the welding machine controls SLI 1 and SM 2 a. At the same time, the normally closed contact ki 1 is opened and the relay K 1 for the welding material supply shuts off, whose work contact к 1 interrupts the drive M for the welding material supply.

The work contact к 3 of the start relay for the welding machine controls, in series with the normally open contact ki 1 of the initiator-operated relay, energizes the relay Ks 1 through the internal circuit of the welding machine controller SIJ 1, thereby initiating the program for the associated pair of electrodes. The relay Ks 1 belonging to the welding machine controller SLI 1 closes its normally open contact ks 1 and via the present normally closed contact ks 2 and via the diode V 6

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the storage relay K 2 is energized, which closes its own holding circuit from P via its contact к 2. Another working contact k2 of the storage relay K 2 closes and prepares the second exciter circuit for the relay K 1 for the welding material supply and the shutdown circuit for the starting relay K 3.

With the completion of the welding cycle, the relay Ks 1 is switched off by the internal circuit of the welding machine control SM 1, thus closing the normally closed contact ks 1 and the same working contact opens. As a result, via P, normally closed contact ks 2, normally closed contact ks 1, via the already closed normally open contact к 2 of the storage relay K 2 and the diode V 4, the relay K 1 for the welding material supply energized and his work contact к 1 of the drive M for the welding material supply switched on again. At the same time via the same circuit ks 2, ks 1, к 2 and via the diode 7 5, the start relay K 3 is turned off. Thus, the circuit of the already turned off by the internal welding machine control SM 1 relay Ks 1 from the working contact к 3 of the start relay K 3 is opened and prepared for the following welding cycle.

Hit switching on the drive M for the welding material supply the measuring flag is driven out of the Hessbereich of the first initiator whose associated relay closes its normally closed contact ki 1 and opens its same designated working contact. Thus, the excitation circuit via P, normally closed contact ki 2, normally closed contact ki 1, diode V 3 is closed for the already energized relay K 1 for the welding material supply and via this same circuit and diode 7 2, the storage relay K 2 off. Thus, the basic position of the circuit arrangement is reached again until the next information acquisition. The diode 7 1 blocks the relay K 1 for the welding material supply in addition to the Pail, in which the electrode pairs already lowered, the working contacts ki 1 and ki 2 again in their rest position, by slight 7erfahren the test flag from the measuring range of concern Initiators, are gone .

The scope of the circuit arrangement also remains when the number of initiators IdL 1, ki 2, ki n, and the number of electrode pairs ks 1, ks 2, ks n, increases.

Claims (2)

232 323 3 Inventory Approach 1. Circuit arrangement for the sequential control of drives for the automatic welding material supply in conjunction with the welding machine and their Slektrodenpaaren, each of which initiators are assigned to close the relay contacts of the start relay for the machine control, characterized in that connected via all in series quiescent positions of the changeover (ki 1, ki 2) of the initiators actuated relay, a relay (K 1), for the drive (M) of the welding material supply via a diode (V 3) excited and a storage relay (K 2) simultaneously via a diode (V 2) in conjunction with its series resistor (R 2) is held by the so-applied inverted signal in its rest position, and all parallel operating positions of the same Umsehaltkontakte (ki 1, ki 2) a start relay (K 3) for the welding machine controls (SM 1, SM 2) is energized and that on all in-line rest positions of changeover contacts (ks 2, ks 2) belonging to the welding machine controls (SM 1, SM 2) relays (Ks 1, Ks 2) and in series with a normally open contact (k 2) of the storage relay (K 2) and a diode (V 4) of the holding circuit for the Relay (K 1) prepared for the drive (M) of Schweißgutzuführung and at the same time via a diode (V 5) the starting relay (K 3) in conjunction with its series resistor (R 3) by the applied inverted signal in its rest position värd and that via the parallel operating positions of the changeover contacts (ks 1, k2), to the welding machine controls (SM 1, SM 2) belonging relays (Ks 1, Ks 2) and a diode (V 6), the storage relay (K 2) energized, its holding circuit via its own normally closed contact (k 2) closed and at the same time the relay (K 1) for the drive (M) of the welding material supply via a diode (V 1) in conjunction with its dropping resistor (R 1) by so adjacent inverted signal shut off and held in its rest position will be. 23233 5 Circuit arrangement according to item 1, characterized in that each of the welding machine controls (SM 1, SM 2) associated relay (Ks 1, Ks 2) via normally open contacts (ki 1, ki 2) operated by the respective initiator relay (Ki 1, Ki 2) in series, each with a normally open contact (k 3) of the starting relay (K 3) for the welding machine control (SLI 1, SM 2) is energized. - For this 2 pages drawings - Documents considered:
DE-AS 1102 928 (21 h, 29/20)