SU713666A1 - Welding process control apparatus - Google Patents

Description

(54) DEVICE FOR MANAGING THE WELDING PROCESS

The invention relates to the automation of welding processes, in particular to the system of joint tracking, and can be used in welding of butt joints with a low accuracy of edge assembly. A device is known for automatically controlling the welding process of curved seams C, c. where the orientation of the welding head is impacted by a circular scanning photo sensor that crosses the edges of the joint and the seam, the output of which receives a signal by comparing the time periods of scanning directly to the seam and the edge of the joint. However, the device does not provide tracking accuracy when technological disturbances appear. A device for automatic control of the welding process is also known, comprising a joint position sensor and an over-edged sensor rigidly connected to the welding head and an adder connected via one input to the joint position sensor via a welding displacement signal generator heads to the axis of the joint, and the output to the control unit for the movement of the head 2. The device provides tracking of the joint when technological processes appear. zmuscheny as exceeding the edges. A disadvantage of this device is the asymglastic location of the seam relative to the axis of the joint. The purpose of the invention is to provide a symmetrical arrangement of the ish relative to the axis of the joint. The goal is achieved by the fact that a shaper of signals for moving the welding head to the butt axis is connected to the device, which is connected to the edge overload sensor and to the second input of the ia-Topa. FIG. 1 shows an e-block diagram of the proposed device. The block diagram includes the welding head 1, the optical sensor 2 of the interface position, the optical sensor 3 over-edge, the adder 4, block 5 Formation of signals for re-welding the welding head to the axis of the joint, block 6 for controlling the movement of the welding head, the driver 7 for moving the welding head to the axis of the joint . FIG. la, 16, IB the voltage U is the signal at the output of the sensor 2, the voltage Uj is the signal at

output of block 5, voltage Ug - signal at the output of sensor 3, voltage 1) - signal at the output of block 7 and voltage Uc - signal at the output of the adder.

The device works as follows.

The optical sensors 2 and 3 are rigidly connected to the welding head 1 and are located at an angle to the welding electrode in such a way that the sensor

2, the other edges of the arc at the entrance to the weld zone, and the sensor

3 scans the end of the welding electrode and arc-lit edges of the welding products.

The output signal of the sensor 2 U carries inorma1 | ik about the position of the joint relative to the welding electrode. If the axis of the joint does not coincide with the axis of the electrode (ig. 1a) tj tj, the signal generation unit 5 converts the signal coming from sensor 2 into a constant voltage L, whose polarity determines the direction of the electrode displacement relative to the axis of the joint. In the absence of overshoot of the signals and., Coming from the output of the sensor 3 is symmetric tj t. In this case, the signal at the output of the Lormirovator 7 - and - is absent. The control signal and, supplied to one input of the adder 4, and at the output of the adder, a signal Uj appears to move the welding head to the interface axis. If the head is located along the axis of the junction if edges are exceeded {fig. 16) signal and I is symmetrical

t t., at the output of block 5 there is no signal. The signal Uj from sensor 3 is not symmetrical, and a constant voltage appears at the output of block 7. the polarity of which corresponds to that, as from the edges ci eineHa. The signal arrives at the second input of the adder 7, at the output of which a Tig signal appears to move the welding head to the butt axis, providing a symmetrical arrangement of the seam relative to the butt axis. When the torch is shifted away from the joint (Fig. 1c), at the output of block 5, the signal C4 is turned on, which goes to the second input of the adder, and the signal at the output of the adder disappears.

Welding with a displaced electrode will last until the excess of the edges to be welded disappears, the U signal disappears, and the electrode moves from the control signal U obtained at the output of unit 5.

invention formula

0 A device for controlling the welding process / containing a junction position sensor and over-edging sensor, rigidly connected to the welding head, an adder connected by one

5 input with a sensor of the position of the joint through the driver of the movement signals of the welding head to the axis of the joint and output with the control unit of the movement of the head, which is characterized by the fact that

the position of the MWA relative to the axis of the joint, the device has introduced a driver for moving the welding head to the axis of the joint,

associated with the elevation sensor and the second input of the adder.

Sources of information taken into account in the examination

1. USSR author's certificate. 221872, cl. At 23 K 9/10, 1967.

 2. USSR author's certificate 411971, cl. At 23 K 9/10, 1971.

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Claims (1)

Claim A device for controlling the welding process, comprising a joint position sensor and an edge excess sensor rigidly connected to the welding head, an adder connected to one input with a joint position sensor via a signal generator for moving the welding head to the axis of the joint ”• and an output with a head moving control unit, characterized in that, in order to ensure a symmetrical position of the willow relative to the axis of the joint, a shaper of signals to move the welding head to the axis of the joint connected to the sensor is introduced into the device sheniya edges and a second input of the adder.