CN1061176A - Surface automatic welding machine circuit - Google Patents

Abstract

The present invention newly designs for surface automatic welding machine circuit, refers to possess welding energy especially and stablizes adjustablely, and speed of welding is variable, to improve speed of production, and to adopt the dual output welding transformer to be suitable for a kind of surface automatic welding machine circuit of unlike material welding.Its characteristics are to utilize the welding transformer of main welding circuit, switching by its change-over switch can be synchronous homophase or the two point welding of out-phase synchronously, and the adjusting of this main its electric power of welding circuit system controls by pulse oscillation circuit, and the welding switch S 4 on the welding control circuit be switched on or switched off can directly control the silicon controlled rectifier (SCR) in the main welding circuit conducting whether, and reach the function of welding.

Description

Surface automatic welding machine circuit

The present invention relates to surface automatic welding machine circuit, relate in particular to welding energy stablize adjustable, speed of welding is variable and adopt the surface automatic welding machine circuit of dual output welding transformer.

Existing clock face automatic welding machine circuit is because its part is numerous and diverse, and welding action susceptibility is poor, thereby on the speed of production of face of weld, can not satisfy the requirement of increasing economic efficiency, long-pending surface soldered machine and the design of ultrasonic scrubber, manufacturing experience and design surface automatic welding machine circuit of the present invention for many years of the inventor, it has thoroughly improved the shortcoming of traditional type circuit.

Purpose of the present invention is to provide a kind of part few, and the surface soldered machine circuit of function raising, to improve the welding speed of production, reduce production costs, and the solder joint of product is superior, conforms with the accurate requirement of clock and watch.

Characteristics of the present invention have: 1. adopt and can adjust the welding current loop, and speed of welding is fast thereby can improve speed of production; 2. adopt synchronous dual output welding circuit, can freely select welding of synchronous out-phase two point or homophase two point welding synchronously so that this bonding machine applicable to the surface of unlike material; 3. the action that utilizes single-node transistor UJT control one to exchange triac TRIAC is used for electric adjustment; 4. when the welding switch connection, the silicon controlled rectifier (SCR) SCR conducting of its main welding circuit impels capacitor C 1, C2 discharge, and this TRIAC will close (not on-state) automatically simultaneously, thereby improve the security of this circuit.

Fig. 1 is the electrical schematic diagram of one embodiment of the invention.

Narrate non-limiting embodiment of the present invention referring now to accompanying drawing, will be more clear by narrating all characteristics of the present invention and advantage.

Fig. 1 is the circuit diagram of the embodiment of surface automatic welding machine circuit of the present invention.As shown in the figure, the present invention is made up of main welding circuit 1, pulse oscillation circuit 2 and welding control circuit 3, and its course of action is described below:

Main welding circuit 1 its input voltage by a bridge rectifier D 1 rectification and to capacitor C 1, C2 charging, and utilizes variable resistor VR1, VR2 to adjust this capacitance discharges electric current after step-up transformer T1 boosts; Again if during the bigger welding foot of desire welding, can be by change-over switch S1A, S2A in the loop 11,12 incision for connecting, make capacitor C 1, C2 shunt capacitance C11, C21 and weld respectively; If will adjust weld interval (speed), but operating selection switch S1B, S2B, and the coil amount that the conversion welding transformer inserts reaches the purpose that changes speed of welding.

Again, have a selector switch S2 C on the welding transformer PT2 in addition and on PT1, PT2 common port, having a switching switch S 3, when this bonding machine, when desire is welded the surface of the material of Phosphorus copper coin or copper-nickel alloy plate, selector switch S2 C should switch to A position (as shown in the figure), and switch S 3 promptly links to each other with welding bench 4 for connecting, and this will make welding transformer PT1, PT2 be synchronous homophase two point welding; But when welding the surface of bronze sheet as if desire, then S2C should switch to the B position, and the S3 disconnection, and making PT1, PT2 is synchronous out-phase, so makes the present invention possess the function of simple and easy switching to the spot welding of unlike material.

In addition, have a silicon controlled rectifier (SCR) SCR on this main welding circuit 1, its g utmost point is connected to a welding control circuit 3, supplies with the SCR triggering signal by this welding control circuit.

Again, the primary coil of step-up transformer T1 is connected to the t2 end that exchanges triac TRIAC, and the g utmost point of TRIAC is connected to the coil of pulse transformer T3, and it and pulse oscillation circuit 2 form an alternating electromotive force and adjust the loop.Again secondary coil T2A, the T2B of the transformer T2 of this pulse oscillation circuit 2, and T2C be connected respectively to its follow-up bridge rectifier D 2, D3, D4.Wherein be parallel with a Zener diode Z1 in bridge rectifier D 2, can make feedbacking to the voltage of the b utmost point of transistor Q1 and the formed potential difference of back bias voltage that applies by Z1 through variable resistor VR3 of autonomous welding circuit 1 keep certain stability by resistance R 3, branch hydraulic circuit that R4 formed, and the big I of this feedback voltage is adjusted by means of VR3, adjusting the triggering phase angle of UJT, and reach the function of electric adjustment.

Moreover, welding control circuit 3 is obtained power supply by bridge rectifier D 4, this moment is if welding switch S 4 is operating as connection, the b utmost point of transistor Q2 will bear a positive bias and make transistor Q2 conducting, the e utmost point of this Q2 will be sent the b utmost point of the transistor Q1 of an electric current to the circuits for triggering 2 this moment, and make this transistor Q1 is conducting state, thereby UJT is ended, vibration stops, and T3 pulse-free signal and TRIA is turn-offed, and obtain a triggering signal because of the g utmost point that S4 connects the silicon controlled rectifier (SCR) SCR that makes winner's welding circuit this moment, and make its conducting, capacitor C 1, C2 is through PT1, PT2 discharges and the surface is welded.

If welding is finished, S4 disconnects, this TRIAC conducting again, and promptly capacitor C 1, the C2 of this main welding circuit 1 charge once more, to treat to weld action next time.

In sum, effect of the present invention and practicality have met Patent Law initiative and practical regulation, and the protection of in accordance with the law applying for a patent is to safeguard inventor, applicant's rights and interests.

Claims (1)

1, a kind of surface automatic welding machine circuit, it is characterized in that, by a step-up transformer T1 power supply is boosted in the main welding circuit, via supplying with follow-up two charging and discharging circuit of being formed by capacitor C 1, C11, variable resistor VR1, welding transformer PT1 and capacitor C 2, C21, variable resistor VR2, welding transformer PT2 after the bridge rectifier rectification, make capacitor C 1, C2 charging, and shunt capacitance C11, C21 make to be fit to the thicker welding foot of welding to change capacitance respectively can to make capacitor C 1, C2 by the switching of a switching switch S 1A, S2A; Can adjust its discharge current in addition by VR1, VR2 and change the switch-on coil amount of PT1, PT2, and change its weld interval by the switching of selector switch S1B, S2B; Each end of the secondary coil of PT1, PT2 is connected with the welding bench conduction again, the other end then is common port, and have one and switch switch, primary side at PT2 has a selector switch S2C in addition, it has A, B switching point, when it switches to A or B point, reaches S3 for being switched on or switched off, be that synchronous homophase or synchronous out-phase are welded to be applicable to the welding on unlike material surface with making PT1, PT2; The g utmost point of the silicon controlled rectifier (SCR) of this circuit is connected on the welding control circuit, to obtain the triggering signal of silicon controlled rectifier (SCR).

Again, the electric adjustment loop is by exchanging triac TRIAC, pulse transformer T3 and pulse oscillation circuit are formed, wherein the g utmost point of TRIAC be subjected to the unijunction transistor control of pulse oscillation circuit and this pulsed triggering circuit by the elementary of a transformer T2 and receive power end, and its secondary T2A, T2B, T2C then is connected to the bridge rectifier D 2 in its subsequent conditioning circuit respectively, D3, D4, wherein D2 is parallel with a Zener diode Z1, to stablize the b utmost point bias voltage of Q1, and can the b of the transistor Q1 utmost point produce back bias voltage and can by in the main welding circuit by resistance R 3, R4, one fen hydraulic circuit that variable resistor VR3 forms is feedback the b utmost point of a voltage to Q1, and forms a potential difference with this back bias voltage; In addition can change this current potential extent and change the phase angle of unijunction transistor UJT trigger impulse, thereby change the g utmost point triggering signal of TRIAC, form power regulation circuit by VR3; And

Welding control circuit is connected to a bridge rectifier D 4 by transformer T2 secondary coil T2C, power supply as this circuit, and this circuit has a welding switch, when this welding switch connection, silicon controlled rectifier (SCR) conducting in the main welding circuit, capacitor C 1, C2 are discharged to welding transformer, and to welding on the surface on the welding bench; When transistor Q2 is conducting simultaneously, its e utmost point is exported an electric current, deliver to the b utmost point of transistor Q1, and offset with the phase difference of the back bias voltage of the feedback voltage of minute hydraulic circuit and bridge rectifier D 2, make transistor Q1 conducting, make the unijunction transistor UJT failure of oscillations, thereby exchanging triac TRIAC turn-offs, make this circuit when doing surface soldered, main welding circuit stops charging, and promptly SCR is that conducting, TRAIC are for turn-offing, but if SCR is for turn-offing, then TRAIC is conducting, so that charging and discharging circuit performance function, and make this circuit have quite safe performance.