SU1255340A1 - Apparatus for elctron-beam welding - Google Patents

Description

The invention relates to welding production, namely to devices for electron beam welding with an electron beam sweep.

The aim of the invention is to improve the quality of the welded joint by compensating for the pulsations of the accelerating direction.

FIG. 1 is a block diagram of a device for electron beam welding; in fig. 2 - polling unit; in fig. 3 - communication unit.

The device contains the emitter 1 of the electron beam 2, equipped with a deflecting electromagnetic system 3, which controls the position of the electron beam on the surface of the product 4 in the weld pool 5, a block 6 of DC amplifiers, a sweep generator 7 including a digital-to-analog converter 8, a matrix 9 a memory, a counter 10 and a communication unit 11, a counter 12, a decoder 13, a polling unit 14, a counter 15, a control panel 16, a decoder 17 and a controllable source 18.

FIG. 1 also shows the scanning contour of the electron scanning circuit 19 and the additional scanning sector 20.

Interrogation unit 14 (FIG. 2) has a sync generator 21, a controlled divider 22, and And 23 and 24 elements.

The communication unit 11 (FIG. 3) contains two elements OR 25 and 26.

The device works as follows.

After switching on the device, emitter 1 forms a beam of 2 electrons in the direction of product 4. Under the action of beam 2, a welding bath 5 is formed. Synchronization generator 21 generates a pulse sequence of signals that synchronizes the operation of the generator 7 of the electron beam sweep and enters the divider 22 and the input to the counter 10. When the code changes, the output of the counter 10 changes the address of the information memory read from the matrix 9. This information is converted into a digital-to-analog converter 8 into signals that specify the position of the electron beam in the welding zone. The division factor of the controlled divider 22 is constant. A change in this coefficient or a change in the frequency of the synchronous generator 21 leads to a change in the speed of movement of the electron beam along the contour of the sweep 19, which can be anything, in particular ring-shaped (Fig. 1). The dimensions of the beam sweep contour are specified

the value of the reference voltage supplied from the controlled source 18, which can be controlled both from the console 16 and the signals from the decoder 17.

The pulse sequence of the signals of the synchronous generator 21 passes through one of the elements AND 23 or 24, is fed to the inputs of the counter 15 and the input of the communication unit 11. In communication block 11, the pulse sequences of the AND 23 and 24 elements are summed with the sequence from the controlled divider 22 using the elements OR 25 and 26. Under the action of the sequences of the elements 23 and 24, it starts scanning the address code at the output of the counter 10, in accordance with which scan beam 2 along the sweep contour 19. The magnitude of the additional scanning sector 20 is set from the control panel 16 using the decoder 17, which controls the contents of the counter 15 and, when the maximum offset code is reached, gives out drove to change the input for 21 pulses coming from the synchro generator. The signals from the outputs of the decoder 17 are fed to the control inputs of the elements 23 and 24. The other inputs of these elements receive a signal from the output of the controlled divider 22. This signal prevents the passage of pulses to the input of the communication unit 11 through the elements 23 and 24. From the decoder 13 also prohibits signal. The decoder 13 controls the contents of the counter 12, and only when the counter is filled for the first time does the enabling signal appear at the output of the decoder 13. The counter 12 is actually a frequency divider controlled from the console 16. The division factor determines the phase shift of the inclusion of an additional electron beam scan. Thus, phase and amplitude control of beam scanning along a scanning contour is provided.

If necessary, the signals of the decoder 17 discretely change the setting of the controlled source 18 to the scan cycle time, with the sign of the scanning speed determining the sign of the change of the contour size (Fig. I).

Thus, due to the fact that new units, blocks and connections have been introduced, a device can be used to control the process of electron-beam welding in the presence of acceleration voltage pulsations.

FIG. 2

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Claims (1)

A DEVICE FOR ELECTRON BEAM WELDING, comprising an emitter deflecting an electromagnetic system, to which an output of an amplifier unit is connected, to the input of which a series-connected digital-to-analog converter, a controlled source and a first decoder are connected, the first output of the control panel being connected to the second input of a controlled source, as well as a memory matrix, characterized in that, in order to improve the quality of the welded joint by compensating for ripples of the accelerating voltage, they are introduced into it after The first counter, the second decoder, the polling unit and the second counter are connected together, as well as the communication unit connected to the third counter, the outputs of which are connected to the inputs of the memory matrix, the second output of the control panel is connected to the first input of the first counter, and the third output of the control panel is connected to the first input of the first decoder, the second input of which is connected to the output of the second counter, the first and second outputs of the first decoder are connected respectively to the second and third inputs of the polling unit, the first and second outputs of which on respectively connected to first and second inputs of the communication unit, a third input coupled to a second input of the first counter and third output interrogation unit. SU „, 1255340