SU50583A1 - Automatic Butt Welding Device - Google Patents

Description

The present invention is aimed at fully automating the process of butt welding by the method of chilling. In the device, according to the image, the inertia-free relays (thyratrons) are used, which control the reversing motor of the jaws and the photo relay (or thermal relay), which is triggered after the proper heating of the welded objects. Up to this point, the indicated relay does not operate, and through one group of its contacts, the feed motor is continuously reversed; how the constant sparking between the parts being welded is maintained. After the photorelay is triggered, the feed motor works towards the compression of the melted ends.

Proposed according to the invention, the device shown in the drawing.

In this device, for reversing and feeding, a block is used, which includes a M-series DIATER M: two opposite windings of vozzuzhdeniya, the circuits of which include: treading R and R, gas turbine G l thyratron Tj. Ignition and extinguishing

the thyratron T is determined by the voltage change in the secondary circuit of the transformer S during the welding process, and the control is carried out using the control transformer S with a conversion ratio of 1/10.

To control the degree of heating of the rods, the photo relay serves as F. At a certain temperature, the values of which can be regulated within wide limits, the ends of the product being welded are compressed and the mashine is turned off.

The amount of compression is determined by the time delay, which can be adjusted over a wide range.

When the starting button K is closed, the transformer 5 of the welding machine is powered, as well as an automatic device. Thyratron T ignites. As a result, the reversible motor M begins to rotate and brings together the sponges I and II of the maitina to the contact of the rods being welded. After that, the voltage removed by the trance manager, Sj, is significantly reduced. schaellus, causes tiratro.

at TI and reversed feed, but as soon as the voltage at the interface increases to a definable value, tiratron 2 will again and the IM engine will bring the parts together again. Thus, the irivodic engine M will always reverse and support sparking. This mode will last until the ends of the rods are heated to the set temperature, after which the photo relay F, which has bottom grupps of contacts, of which contacts 3-4 are working and working 5-opening, is locked and blocked. The closure of the contacts 5 causes the inclusion of the power contactor P; with MgSH, the tires that are blocked through their contact 1. After that, the power supply to the machine stops due to the opening of the contact 2 and the compression of the rods begins. Since in the terminal 5 the primary circuit of the control transformer S is opened, and this causes the suppression of the TI thyratron, the drive motor M will continue to rotate in the same direction, compressing the parts. Compression will occur until the time relay trips, which in contact 6 will turn off the motor M. The time relay is switched on by contact 4 of the photorelay F,

At the same time, capacitor C starts charging through diode D. When the voltage on the capacitor increases up to the ignition voltage of the thyratron Tg, the latter ignites, and the discharge current is tripped and blocked through its contact 7 by the electromagnetic relay. The exposure time will be oredeleio as follows:

.C.R,

where T is the time of exposure for 3 seconds, C is the capacity of the charge cone jugger,

R is the resistance of the charging circuit (internal resistance of the diode D,

K-constant coefficient, which is determined by

supply voltage, the magnitude of the grid voltage F. T. thyratron, which changes the ignition threshold, and so on.

The magnitude of the compression is regulated in wide frames by the relay delay, which is determined by the magnitude of the diode D (through a rheostat), the capacitor C and the change in the ignition threshold of the thyratron T using grid offset V.

To re-work the circuit, you must unlock it by turning off the start button / C to turn it on again.

Instead of a photo relay, any thermal relay can be used.

The subject matter of the invention.

Claims (3)

1. A device for automatic butt-welding by pressing with the use of inertia-free (tiratron), characterized in that the chain of the grid of the thyratron G controlling the reversing motor M serves to drive the jaws to the jaws through the transformer 5c in the pepvich chain of which open-contact contacts 5 of the photo relay F, designed to act after proper heating of the welded objects, in order to a) carry out continuous reversal of the motor M during the welding process before the action of the photo relay to maintain constant sparking between the ends to be welded, which is necessary to heat them up to the tempo:; batches, b) making the engine M working towards the compression of the fused ends after the photo relay. 1 In the device according to claim 1, a torque-free (thyratron) time relay is used to set the compression value of the pre-mixes to be welded. 3. In the device on PP. 1 and 2, use thermal relays instead of a photo relay.