SU348046A1 - RELAXATION CONDENSING MACHINE FOR SEAM WELDING - Google Patents

Description

The known relay relay of a shoan contains a battery of working co-sensors, which is powered by a cryptographic driver, and a switching 1K network through re-generation elements using a charging switch, a welding transformer, electrically connected through a discharge pyristor switch with an ipai-oehyo-pyr battery with an ipai-o-py-pyo battery. A control unit of the bit switch connected to the thyristor control circuit.

The purpose of the invention is to stabilize the frequency of the follow-up welding pulse in the oscillations of the network.

This is achieved by the fact that, in the block of control of the | | com computer, there are “interleaved for the frequency and the node 1Вы; key H} 1 of the discharge | co1M1 switch.

In addition, in order to improve the accuracy of voltage stabilization on the battery of workers working at the control of the switch Commutato; p01m, the input chain is detached from consecutively connected resistors and auxiliary janitor and shunnantly The voltage supply is connected in parallel to the battery of the working capacitor OIB and electrically OC1 and connected to the control circuit of the discharge thyristor a.

In order to prevent the return of the bite 1 of the welded point, in the control unit of the discharge KOiM switch a bias capacitor is inserted, the discharge circuit of which is connected to the reference diode installed in the control circuit of the discharge thyristor and in charge The automatic voltage source and a normally jumpered key, which opens when the charging switch is turned on, is installed.

The drawing shows a variant of the proposed machine.

The schematic of the machine contains reactive current-limiting elements Ci-C3, included in each phase on the alternating side; straightener assembled on airs

D1-db but Larionov's scheme; DC choke, connected on the DC side, and a discharge unit, consisting of successively switched-on batteries of working capacitors Cf, shunted by D iod Dt, a welding transformer of the TS, and a TI discharge of a thyristor. The control electrode of the latter is connected to the on / off block B1, and 1 mi, and m, the distor D & with dd, dy divider diodes and divider R connected in parallel

battery capacitors Wed. A pair. Parallel to the latter is also connected to the circuit. It consists of a series-connected resistor and a stabilovolt Yes, shunted by a capacitor Ci. Moreover, the common point of the stabilized diode Dd is connected to IK a1On the yiKHaaiHiHiOro Dinistor DaBlo C to turn on / discharge the thyristor TI contains the same result, which is also connected from the reference diode and the co-supposer, and the co-supposer, and the co-supposer, the co-supposer, and the co-supposer; -switch / S 1mash1Inyy yod Sbdi1Nen istolilk constantI NN E. e. S. Ya.

The machine contains a Ti thyristor shutdown node, performed in an IB form of a target, connected in parallel with the indicated thyristor TI and consisting of a series of 1K01M mutating, it is given to the torus a d; and all omogatelinolo thyristor TZ, in a shunt HNLO IB inverse 1 on 1 direction and the next 10; driver: charged and inductance L and diode | 01M D tsTan control thyristor Tz through the discharging diy D is connected with the independent generator driver // // zadachi the frequency of welding impulses, and through the dissipating diode D15 - from 1 OUT | 0 (TO | M control circuit, which has an emulsion transformer IT, dinistor D16.1K01Nde1Nsator Ce and divider R, the input of which is connected parallel to the discharge thyristor Ti.

The machine works as follows.

In the outcome of the OM state, TI, Tyr, Tr. and di1H1Distors Dv, D16 are turned off, capacitors Cp, Cu, C / ,, Sat are discharged, and (the capacitor Sa is charged through normally closed plug terminals of the switch1 phone1 / C from the source of any1; S1

When the IK machine is connected to the network using a switch K, the working battery of the Condenser O | V Cp starts through the capacitance t01K 00 Limit | vyu | Cie-Cz.

The parameters Ri, Dv and Rt, Dk are chosen so that when the voltage on the capacitor battery Cp installed by the delutter is reached, the D16 distorist turns on when the Ct capacitor C is discharged to the IT transpharmacy device, the thyristor turns on, and the condenser | Simultaneously with the charging of the battery of movdators Cp, the capacitor Ci is also charged, and the thank you to the stabilizer –Dolta D | I01N dansato: p C is always charged to one and the same iTOiro voltage.

A pinch consisting of a resistor Rz, a capacitor C4 and a stabilovolt Yes is calculated in such a way that MONDENSATAR d is charged before the voltage of the stabilovolt Di is always earlier, the capacitor bank Cp is at a predetermined voltage level. In MOIMBHT, a predetermined voltage level on the capacitor battery Cp turns on dynistor Dv and (Capacitor Ci is discharged through resistor Rs, diode D, dynistor Yes and TI thyristor control chip. The last one turns on, and the battery turns on Cp discharges through C : Var | Otey transMatar TS and thyristor Ti. A welded pulse rroiKa passes through the parts to be welded. Thanks to the H | TO. The C4 capacitor is charged through the autonomic circuit, it does not affect the stabilization of the voltage on the capacitor bank Wed.

Simultaneously with the discharge of the battery of working capacitors through the opening thyristor Ti, diode D13 and inductance L, the capacitor C is recharged. The recharge is due to (oscillatory nature of the discharge process, the polarity of charging of the capacitor Sk 1 being reversed. Tyr | The Ti source remains in the switched on state due to the flow of current from the openings of the target. At the moment of arrival of the pulse from the generator output // - frequency control of welding pulses to the control electrode of the thyristor

A ga - the last one opens, and the reverse polarity voltage across the capacitor Sk is applied to the iK portion of the anode-1 cathode of the thyristor Ti, due to which the latter is turned off. After turning off the thyristor Ti battery

the capacitors Cp starts charging again, and the cycle is repeated until the machine is turned off. The welding frequency is determined only by the frequency of the independent master oscillator // of pulses of a stable and adjustable frequency and is independent of the mains voltage.

To eliminate burn-throughs of the first weld, the scheme provides for obtaining a reduced first I1M | Pulse welding

current. For the atomic capacitor, Cs is precharged to the voltage of a controlled constant voltage source. E, so when the first charge Cp diN1I St Da turns on at (lower voltage compared to the voltage set by the divider. Then the capacitor Cs is discharged through the inistor D & Ti control circuit Ti, divider Ri, Dyvn diode Further, it does not take any part in the operation of the circuit, since it is normal for: the closed contact of the switch K is open and the emf E is disconnected from the capacitor Cs.

Subject invention

Claims (3)

1. Relaxation condenser shtyunnogo welding machine, containing a battery of working capacitors, charged from a power rectifier connected to the network through reactive elements using a charging switch, welding tracer electrically connected through a discharge thyristor switch with a battery of working capacitors, and a control unit for the control of a discharge switch connected to the control circuit thyristor, characterized in that, in order to stabilize the frequency of the welding pulses following when the mains voltage fluctuates, independent settings of the frequency and the switch-off unit of the discharge switch, containing a commutated capacitor, the charge discharge terminal of the a-s pin, which contains an auxiliary thyristor and a voltage divider connected in parallel with the discharge An independent thyristor is electrically used with the specified divider 1 and the same frequency and frequency control. 2. The machine according to claim 1, characterized in that, for the purpose of stabilizing the accuracy of charging the battery of the workers of the Kondemsato, to the control unit of the R1 network, the iBiseae H switchboards consist of a series connected resistor and auxiliary capacitor, shunt stabilized, connected in parallel with the battery of workers 1KO | Ndensato1pO | V and electrically Lvyv-lr connected to the control circuit of the thyristor. 3. Machine on PP. 1 and 2, characterized in that, with the goal of preventing the burn-through of the first weld point, the OiMiMyTaropoiM discharge control unit (the bias capacitor was inserted, the iKOTOporo 1 discharge circuit was connected to the reference diode installed in the control circuit of the discharge circuit connected to the control diode installed in the control circuit of the discharge circuit connected 1 , and the autonomous source of constant voltage and norm is installed in the charging circuit: the minimum open key that is opened when the charging switch is turned on.