SU1428546A1 - Apparatus for controlling amplitude characteristics of vibrated-arc welding process - Google Patents

Abstract

 The invention relates to the field of welding and can be used in automatic surfacing with electrode wire. The goal is to stabilize the surfacing process while synchronizing the amplitude of the vibration of the electrode end and arc voltage. The device has a feeder and vibration electrode with an electromagnetic drive. A feed roller, freely mounted on the drive shaft, is connected to the cores of two electromagnets that are mounted on the drive shaft disc. Electromagnets receive power from the control circuit at times corresponding to the optimum values of the upper and lower arc voltage levels. The device allows you to optimize the process of surfacing on the amplitude (and frequency) characteristics and improve the quality of recovery, 4 Il. (L

Description

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The invention relates to welding and machining to be used in automatic surfacing with electrode wire. .

The purpose of the invention is to stabilize the surfacing process while synchronizing the amplitude of the vibration of the end of the electrode and the arc voltage.

FIG. 1 shows a block diagram of the device; in fig. 2 - vibration mechanism; in fig. 3 shows section A-A in FIG. 2; on fkg. 4 is a view B in FIG. 2,

; The device consists of a feeder circuit (Fig. 2) in which the drive shaft 1 is rigidly connected to the disk 2. The discharging roller 3 of the mechanism is installed C; using ball bearings on the shaft 1, the roller 3 has a sleeve 4, which is connected to the core 5 of the electromagnet 6, fixed frontally relative to each other on the disk 2. H | and 10 is connected to the protrusion of the sleeve 4. A spring-loaded pressure roller 11 (FIG. 4) is fixed to the head body, which presses the h-arm to the feed roller 3. Ka. the carcasses of the electromagnets of the mechanism are powered by amplifiers (US) of power. The input signals to the MS come from the trigger (TG) through the pulse shapers (PI), which determine the shape and duration of the signal. The TG is two-input, which makes it control two signals corresponding to the achievement of the arc voltage level of the upper Ug or lower egg ... values. These signals are formed in comparators (Kg and Kc). The signal from Cr enters the TG input when the arc voltage reaches the level corresponding to the specified value. The signal from Cr is formed by the widest value of the arc arc voltage and corresponds to the stable course of the surfacing process. The reference signals in the comparator blocks (comparators) are formed by special devices C and Cr, ,, The levels of these signals can be chosen freely, however, they depend on the general characteristics of the device and, to a greater extent, on the mechanical system, the feeding mechanism — the electrode wire. Due to the fact that the device uses single-type comparators that form the output signal when the monitored and set voltages coincide with the approach

last from the bottom, at the input of the unit is an inverter. The signal for the device control circuit is the arc gap voltage.

The device works as follows.

The electronic components of the device are initially powered, which is necessary for their elements to return to their original, operational state. The power source of the welding arc is switched on. The no-load voltage is close to the maximum arc gap, therefore K (, generates a signal that turns over and TG. At the inverse output of the TG, the signal O is set at the forward output - signal 1. This signal comes through PHI US supply magnet (EM) which turns the feed roller so that the electrode moves to the surface being deposited.When the power of the feed motor is turned on, the electrode moves the arc gap to the product and the voltage at this point corresponds to the value of Ua. the signal from the comparator output disappears. At the same time, a signal is generated at the output KH, which, turning the TG, causes the lower electromagnet (3Mij) to operate (through the corresponding amplifying forming blocks). bends to values of Ug., KB is triggered, the process is repeated.

A predictable device containing the described control circuit and the feed mechanism avoids the influence of the mechanical system on the amplitude characteristics of the process (wear in the hinges, wire slippage in the rollers, etc.), since the appearance of a signal to return the mechanism to this or that the position depends only on the voltage on the arc. At the same time, the likelihood of stray transfer of molten metal or sticking of an electrode almost disappears. The vibration frequency of the end of the electrode corresponds to the energy indices of the process and its stability. By introducing the FI, FIL, and FIL into the system, it is possible to set the necessary form of pulses controlling the electromagnets.

Claims (1)

Invention Formula A control unit for the amplitude characteristics of the vibration arc surfacing process, comprising a wire feed mechanism with a pressure roller and feed roller, freely mounted on. a drive shaft, a disk mounted on the drive shaft and spring-loaded with respect to the feed roller, an electromagnet mounted (On the disk, the electromagnet’s bite is kinematically connected with a feed roller, characterized in that, in order to stabilize the welding process when stress arc, it is equipped with a second electromagnet, dvum comparators, an inverter, a trigger, two pulse shapers and two amplifiers, while the second electromagnet is mounted on the frontal disk of the second electromagnet; the gap, and the low level comparator is connected to the arc gap through the inverter, the outputs of the comparators are connected to the trigger inputs, the outputs of which are connected to the inputs of the pulse formers, connected via amplifiers ate with electromagnets. sh g. Fi, 1 1 dues Fig Aa Fig, s