SU1459841A1 - Apparatus for welding - Google Patents

Abstract

The invention relates to the automation of welding production, in particular, butt tracking devices, and can be used when welding butt welds with a split edge. The purpose of the invention is to expand the functionality of the device by normalizing the amplitude of the oscillations of the electrode in the upper part of the groove. The device contains actuators of vertical and horizontal electrode movements, a sensor and an arc voltage adjuster, a pickup height adjuster for cutting electrode, two different polarity voltage sources, a switch, two AND elements, two NOT elements, an integrator, a delay element, a trigger, two comparators and null organ. The controllers and the delay element provide for the regulation of the arc dip, the amount of elec- tion lifting in the groove and the amplitude of the oscillations of the electrode. Because There is no sensor for vertical movement of the electrode, the latter is not limited. 1 il. - vo (L

Description

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The invention relates to the automation of welding production, in particular, to a joint tracking device, and can be used for welding butt with {Split Edge.

The purpose of the invention is to expand the functionality of the device by normalizing the amplitude of the oscillations of the electrode in the upper part of the groove.

The drawing shows the functional diagram of the device for welding.

The device comprises a drive 1 of vertical movement of the electrode, a drive 2 of horizontal (transverse) movement of the electrode, an arc voltage sensor 3 connected to a source of welding current, a setpoint device

arc voltage, setting device 5 for lifting height of electrode after cutting, first comparator 6, the first input of which is connected with output of setting device 5 for lifting height of electrode after cutting, second comparator 7 connected by inputs to sensor 3 of arc voltage and setting device 4 of arc voltage, a three-input element AND 8, a switch 9 with two control and two information inputs, an integrator 10, whose input is connected to the output of switch 9, and an output to the second input of the first comparator 6, connected in series to the delay element 11 and the trigger 12, the output to orogo actuator 2 is connected to the horizontal movement of the electrode 13 and the source of positive negative4:

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14 voltages connected to the formation inputs of the switch 9, the first 15 and the second 16 elements are NOT, the two-input element I 17 and the null-organ 18.

The output of the first comparator 6 is connected to the input of the delay element 11 and the input of the first element 15, the output of which is connected to the first inputs of the two-input element 17 and the three-input element 8. The output of the second comparator 7 is connected to the input of the vertical displacement actuator 1, with the second input of the three-input element And 8 and with the input of the second element NOT 16. The input of the null organ 18 is connected to the output of the integrator 10, and the output is connected to the third input of the three-input element IV. The output of the second element NOT 16 is connected to the second input of the two-input element I 17, the output of which is connected to the first control input of the switch 9, the second control input of which is connected to the output of the three-input element 8.

the drive 1 of the vertical movement of the electrode monitors the contour of the butt splitting along the vertex and is made in the form of a DC drive. The horizontal movement actuator 2 of the electrode performs the function of lateral displacement of the electrode relative to the groove and is also designed as a direct current drive. Sensor 3 and unit 4 arc voltage analog.

The setting unit 5 of the lifting height of the electrode after cutting is designed as an analog voltage setting unit. Company1459841 in15

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Before welding, by means of sensors 4 and 5, the nominal arc voltage and the height of the elec- tion of the electrode from the depth of the groove with cross section

 oscillations of the electrode and set by the delay element 11 the required delay time, which determines the amplitude of the transverse col

Q Electrode Bay. Next, I set trigger 12 to the state in which the electrode begins its movement towards the butt splitting (towards the opposite edge of the joint), and the integrator 10 to the zero state at the output. In the process of moving the electrode to the opposite edge, the electric is lowered into the groove by means of a vertical movement drive 1 whose direction of rotation is determined by the comparator 7 the separation of the signals at the outputs of the arc voltage generator 4 and the arc voltage sensor 3. When the voltage is exceeded

25, the arc of the reference value at the output of the comparator 7 appears a single signal, which causes the electrode to move downward by the actuator 1 of the vertical displacement. At the same time through the element 16 to the second input of the two-input element And 17 is fed to the left signal, and, accordingly, the first control input of the switch 9 also forms a zero signal, closing the transistor switch of the switch 9, disconnecting the source 1-3 of the positive voltage from the input of the integrator 10,

Since the output voltage of the integrator 10 is in the initial state

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rators 6 and 7 perform the function Bolnol and less voltage controllers

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Before welding, the nominal arc voltage and the height of the electrode rise from the depth of the groove with the transverse oscillations of the electrode are set by sensor 4 and 5, and the delay element 11 is used to set the required delay time determining the amplitude of the transverse electrodes of the electrode. Next, set the trigger 12 to the state in which the electrode begins its movement towards cutting the joint (to the opposite end) of the joint, and the integrator 10 to the zero state at the output. In the process of moving the electrode to the opposite edge, the electrode is lowered into the groove by means of a vertical movement actuator 1, the direction of rotation of which is determined by the comparator 7 according to the difference of signals at the outputs of the arc voltage generator 4 and the arc voltage sensor 3. Overvoltage

5, the arc of the reference value at the output of the comparator 7 appears a single signal, which causes the electrode to move downwards by means of a vertical movement actuator 1. At the same time, a zero signal is supplied through the element 16 to the second input of the two-input element 17 and, accordingly, a zero signal is formed at the first control input of the switch 9, closing the transistor switch of the switch 9, disconnecting the source 1-3 of the positive voltage integrator input 10,

Since the output voltage of the integrator 10 is in the initial state 0

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else, i.e. when the measured voltage exceeds a given one at the outputs of the comparators, signals of a logical unit are formed; otherwise, the signals of a logical zero are present at the outputs of the comparators 6 and 7. Switch 9 is made in the form of two transistor switches. The delay element 11 delays the leading edge of a pulse for a predetermined time. The trigger is 12 countable. Sources 13 and 14 of positive and negative voltages perform the functions of the integration rate adjusters.

The integrator 10 is analog and has a fault input connected to the output of the delay element 11.

The device works as follows.

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k b, then at the output of the comparator 6 there is a zero signal and, respectively, at the first inputs of the elements And b and 17 there are single signals. In the process of lowering the electrode, periodic changes in the output signal of the comparator occur (due to the sliding mode of operation of the relay system

0 of the regulation, and most of the time, the comparator is in a single state at the output). With a zero signal at the output of the comparator 7 at the second input of the three inputs

5 elements And 8 is zero. the signal, respectively, the negative voltage source 14 is disconnected from the input of the integrator 10 through the second transistor switch 9 key. At the second input of the two-input element And 17 there is a single signal, and, accordingly, a single signal is also generated at its output a positive voltage source 13 is connected to the input of the integrator 10. A voltage appears at the output of the integrator 10, as a result of which a single signal appears at the output of the 18-body 18, which is fed to the third input of the three-input element And 8. Thus, if there is some voltage at the integrator output-10, the element 8 is prepared for subsequent connection by switch 9 to the integrator 10 of the source 14 of negative voltage, while in the process of lowering the electrode, there is a periodic increase and decrease to zero output signal of the integrator 10,

After the transition to the deepest cutting of the cut, the electrode begins to rise along the cut, thus increasing the output signal

The integrator 10, since most of the time in the process of lifting the electrode, a positive voltage source is connected to the integrator 10. After the output of the integrator 10 reaches a predetermined level (the minimum level of which is determined by the level of interference and disturbances, and the maximum level by the cutting depth), a single signal is generated at the output of the comparator 6, which through the first element NOT 15 goes to the first inputs of the AND 8 and 17, by disconnecting both the voltage sources 13 and 14 from the integrator input 10 via the switch 9, and after a delay time determined by the delay element 11, a single signal appears at the reset input of the integrator 10 ntegrator 10 to the zero state and it prepares for a new cycle of operation during movement in the opposite electrode

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(.... On the leading edge of the pulse from the delay element 11, the trigger 12 changes its state, which causes the electrode movement to reverse across the junction by the horizontal electrode movement actuator 2. Next, 1 movement of the electrode is repeated, the delay element 11 is possible regulation of transverse oscillations of the electrode with an amplitude exceeding the width of the groove. In addition, due to the absence of a sensor for vertical movement of the electrode measuring the absolute value of the movement of the electrode, vertical movement This method is unlimited, which expands the technological capabilities of the device when welding products with a variable radius of curvature.

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Formula

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- A welding device containing drives for vertical and horizontal displacement of the electrode, an electrode pick-up height detection sensor associated with the first input of the first comparator, an arc voltage sensor and an arc voltage setting device, characterized in that device by normalizing the amplitude of the oscillations of the electrode in the upper part of the groove, it is additionally equipped with a second comparator, two-input and three-input elements And, switch, integrator, element delays, trigger, sources of positive and negative voltages, two NOT elements and a zero-body, while the output of the first comparator through the delay element is connected to the integrator's inverter input and the counting trigger input and through the first element is NOT connected to the first inputs of both elements And, the arc voltage sensor and the arc voltage adjuster are connected to the inputs of the second comparator, the output of which is connected to the drive input of the vertical displacement of the electrode,

the second input of the three-input element I and through the second element NOT to the second input of the TWO-INPUT IOVO element AND whose output is connected with the first control input of the switch, the output of the switch through the integrator is connected with the second input of the first comparator and the input of the zero-organ, the output zero The organ is connected to the third input of the three-input element I, the output of which is connected with the second control input of the switch, the first and second information inputs of the switch are connected respectively 7-1459841

with positive sources. the integrator, and the output of the trigger and of the negative voltage, the output of the switch, is connected to the input of the horizontal input drive of the horizontal movement of the electrode.

Claims (1)

15 Formula of the invention A welding device comprising vertical and horizontal electrode drives, an electrode lift height adjuster of 20 cutting, connected to the first input of the first comparator, an arc voltage sensor and an arc voltage adjuster, characterized in that, in order to expand the functional capabilities of ^J device by normalizing the amplitude of the oscillations of the electrode in the upper part of the cutting edges, it is additionally equipped with a second comparator, two-input 30 and three-input elements And, a switch, and integrator, delay element, trigger, sources of positive and negative voltages, two elements NOT and 35 by a zero-organ, while the output of the first comparator through the delay element is connected to the zeroing input of the integrator and the counting input of the trigger and through the first element is NOT connected to the 40 first inputs of both elements AND, the arc voltage sensor and the arc voltage adjuster are connected to the inputs of the second comparator, the output which is connected to the input of the actuator of vertical movement of the electrode, the second input of the three-input element And and through the second element NOT to the second input of the two-input element And, the output of which is connected with 50 by the first control input of the switch, the output of the switch through the integrator is connected to the second input of the first comparator and the input of the zero-organ, the output of the zero-organ is connected 55 to the third input of the three-input element And, the output of which is connected to the second control input of the switch, the first and second information inputs of the switch ¹ 1459841, respectively, are associated with positive sources. do integrator, and the trigger output foot negative voltages. to the control input of the drive, the upstream output of the Switch is connected to the outward movement of the electrode.