SU1625623A1 - A method of electron-beam welding - Google Patents

Abstract

InUfegent relates to welding. Prices, inventions improve the quality of the welded joints of electronic energy through the infusion power throughout the liane shns welding welds 15 oivmeci method 1.1 I ove n, svykh on ci alternating and stabilizing the current i electronic and (changing noienunii1 tool s 5 By the absence of i tennis right of: meme; m ii 5 IOOH are the minimum difference -laiai him and pt g - shuffle (ka -i uk troncho about yyuk 14 rights, -you get to gv kat ka ia and Replaces Missnoi ui i Voyages Kagsia 2 Yu kkti / keni tension of the i ruling n 5 for the present 11 s noeooboots ss with s i i abi npa, si of the emission properties of KrToia s about jvr (menisci with tabi ipanis and so far gmektronzh (and the voltage on the right of k to (kind) it has a high crush on ) Amschev ri) oiu with a and etymushevu howl and povpknke u irofu pnosu U and p i boty T S) MOEM W v MOrlHhlX Kil I O 1 And 1

Description

cl

cz

four

/ s

n

2

IT

CD

to

SP

Oi n3

G3

And} the acquisition relates to welding, in particular to the technology of electron-beam cooking.

The aim of the invention is to improve the quality of welded joints by stabilizing the electron beam energy density over the entire range of welding currents.

The drawing shows a diagram of the device that implements the method of electron beam welding

The galvanic isolation device 9 and the regulator 10 are linear elements with constant coefficients, therefore the output voltage of the amplifier 8 is proportional to the voltage on the control electrode 3 of the electron beam gun 1 This voltage is applied to the device 2 compared where compared with the setpoint generated by the setting device 11 by the direct control electrode Pa youth sig15

The method of electron-beam welding of ground signals through the amplifier 13 and the heating current control unit 14 of the cathode changes the emission properties of the cathode 2 until the voltage on the control electrode 3 becomes equal to the specified value. Thus, the emission properties of the cathode are stabilized. 2 with simultaneous stabilization of the current of the electron beam and the voltage on the control electrode 3 The method of electron beam welding ensures a high stabilization of the energy density of the electron beam throughout the entire range of welding currents When using this method, the focusing of the electron beam does not change with a change in the size of the welding gok. This achieves a high stability of the electron beam energy density and improves the quality of the welded joints. The application of the method increases the durability of the thermal emission cathodes of the electron-beam guns, as the cathodes are heated to the current of the electron beam by changing the voltage on the guiding electrode of the electron-beam fly as the heating current of the cathode changes and stabilizing the voltage on the control electrode by varying the heating current of the cathode of the electron beam gun. The device contains an electron beam gun 1 with a thermionic cathode 2 and a control electrode 3. The output of the sensor 4 of the electron beam is connected to one and , the other input of which is connected to the output of the current analyzer 6 of the electron beam. The output of the comparison device 5 through the subtraction unit 7, the first amplifier 8, the galvanic isolation device 9 and the regulator 10 is connected with the control electrode 3 of the electron beam gun 1 The control electrode voltage generator 11 through the second comparison device 12, the second 20

25

The lntel 13 and the unit 14 for controlling the current 30 of the circuit required for the generation are given

Noise of electron beam current

the heating of the cathode is connected with the thermionic cathode 2 of the electron beam gun 1 The second input of the device 12 compare |. to 1an with the output of the first amplifier 8 The method of electron beam welding is as follows

An electron beam current setter 4, a comparison device 5, an electron beam current meter 6, a subtraction unit 7, a first amplifier 8, an electroplating device 9 and a regulator 10 together with an electron-beam gun 1 form a system for controlling the electron beam current by changing the potential of the control electrode 3 In the subtraction unit 7, a voltage LC- () is formed, which is further amplified by the amplifier 8 and transmitted through the galvanically isolated device 9 to the regulator 10 and transformed by it into the control voltage Electrode 3 regulating electronic current

beam of an electron beam gun 1 The change in the potential of the control electrode 3 is made until the difference between the set and controlled values of the current of the electron beam is minimal

The galvanic isolation device 9 and the regulator 10 are linear elements with constant coefficients, therefore the output voltage of the amplifier 8 is proportional to the voltage on the control electrode 3 of the electron beam gun 1 This voltage is applied to the device 2 compared where compared with the setpoint generated by the setting device 11 of the control electrode Pa, the youth of the temperature required for the generation is given

Noise of electron beam current

Testing of the method was carried out on a CEP-2M gun with a U 250AM power source, and modernized according to the previous method. When testing it was found that when the current of the electron beam changed from 10 to 300 mA, the voltage on the control electrode stabilized with an accuracy of ± 10B With this, high stability of the parameters of the process of electron beam welding is achieved.

Claims (1)

Invention Formula A method of electron beam welding, in which the heating current of a cathode is changed and a constant electron current is maintained by varying the voltage on the control electrode of the electron beam gun, characterized in that, in order to improve the quality of the welded joints by stabilizing the electron beam energy density throughout range of welding currents, voltage stabilization at the control electrode is carried out by varying the heating current of the cathode of the electron beam gun