CN2611089Y - Resistance welding spot welding machine with output pulse amplitude and width gang control - Google Patents

Abstract

The utility model relates to a special resistance welding machine for electronic industry and microelectronic industry, which is composed of a host machine, a machine head and a welding head, wherein the control input terminal of a pulse width prewired circuit or a pulse width timing circuit of the host machine is connected with a voltage and time signal conversion circuit which is composed of a voltage dial switch and an SCM. Thus, the pulse voltage and the pulse time can be controlled in a linking way. The utility model which controls the pulse voltage and the pulse time in a linking way can directly use the size of the wire diameter or the model of an enamelled wire which is welded is utilized to input and display welding parameters; thereby, the operation becomes simple and visual. More important, the utility model greatly reduces the phenomena, such as unsolidified weld, workpiece damage and welding head burning-out, etc., caused in the way that the two welding parameter are set improperly. Meanwhile, the utility model also enhances the intellectualized level of welding machine.

Description

The resistance spot weld welding machine of output pulse amplitude and width interlock control

Technical field

A kind of resistance welder that provides electronics industry, microelectronics industry to use specially is provided the utility model, particularly is applicable to enamel-covered wire, lametta or the corresponding metal strip in welding≤Φ 0.40mm line footpath, the small-power resistance welder of sheet metal.

Background technology

The electric spot-welding machine that can directly weld enamel-covered wire that patent No. ZL 01 2 421561 and number of patent application 01 1 14785.7 are proposed belongs to the small-power electric capacity energy storage type resistance spot weld welding machine of controlling size of current with regulation voltage.It is made of main frame, head and soldering tip three parts.Main frame is made up of impulse amplitude prewired circuit, pulse width prewired circuit, pulse width timing circuit, drive circuit, power switch circuit, feedback circuit, low-voltage power circuit, high-voltage power circuit and high-voltage control circuit.General resistance welder all is provided with the adjusting device that can regulate welding current (or weldingvoltage), weld interval and these three welding parameters of welding pressure size.Welding current with ampere office represent, weldingvoltage is with volt office, weld interval, welding pressure was represented with newton office with second or millisecond office.When carrying out the electric resistance welding welding, must select electrode according to the material of welded part, the thickness of workpiece etc., and then configure these three welding parameters of welding current (or weldingvoltage), weld interval and soldering tip pressure, just can obtain satisfied welding effect.Because these three welding parameters can have multiple different configurations combination, improper possible not prison welding of configuration combination or defective work piece, even burn out soldering tip.Is which type of configuration combination only best configuration? how to obtain best configuration combination? become a difficult problem in the production.When fine enamelled wire is carried out spot welding, set these three welding parameters and be even more important.Because operator's level differs, judgement differs, even might directly influence the life-span of welding quality and electrode some inappropriate configurations as proper configuration.A large amount of tests generally will be done by manufacturer, gropes the configuration of these three parameters, accumulates suitable experience, and the quality of welding is guaranteed.

Summary of the invention

The purpose of this utility model provides a kind of resistance welder, directly set and once regulate these two welding parameters of weldingvoltage (or electric current) and weld interval with the size in soldered enamel-covered wire line footpath or with the model of enamel-covered wire, simple to operation, welding quality guarantees.

The resistance spot weld welding machine of the utility model pulse voltage and time interlock control is by main frame, head and soldering tip three parts constitute, main frame is by the impulse amplitude prewired circuit, the pulse width prewired circuit, the pulse width timing circuit, drive circuit, power switch circuit, feedback circuit, low-voltage power circuit, high-voltage power circuit and high-voltage control circuit are formed, it is characterized in that connecting voltage and the time signal translation circuit of forming by voltage toggle switch and single-chip microcomputer, reach interlock control impuls voltage and the effect of time in the control input end of pulse width prewired circuit or pulse width timing circuit.

The utility model resistance welder is being provided with weldingvoltage and weld interval during two welding parameters, according to the experience of manufacturer to the enamel-covered wire welding, the best configuration of two welding parameters, by the signal translation circuit, directly import and demonstration as welding parameter with the size in soldered enamel-covered wire line footpath or the model of enamel-covered wire, and no longer adopt originally respectively with electric current (or voltage), time, welding pressure is as input of welding parameter unit and demonstration, make operation become simple and easy, intuitively, the more important thing is and significantly reduced because two welding parameters are provided with the improper not prison welding that causes, defective work piece, burn out phenomenons such as soldering tip, also make the intelligent level of welding machine improve a class simultaneously.

The factors of mother metal (basic skill or training's part of welded part) and electrode size etc. in addition that need consider when setting welding current (or voltage), weld interval and three welding parameters of soldering tip pressure, can be described as the welding machine special that electronic devices and components are made owing to can directly weld the mash welder of enamel-covered wire, the variation of mother metal and electrode size is little, simultaneously, can also solve the difference that mother metal and weld head size difference are caused by " fine setting " switch is set on the voltage-regulation of mash welder.Like this, make directly that directly to do the welding parameter input with the line of soldered enamel-covered wire easy to implement and have more the characteristics of special plane special use.

Description of drawings

Fig. 1 is voltage and time signal translation circuit schematic diagram.

The specific embodiment

Among Fig. 1, the composition of voltage and time signal translation circuit be connected to: dial switch is connected the in-phase input end of emitter follower U4 respectively through resistance R 11-R15, the output of U4 connects the colelctor electrode of triode Q6; Dial switch is in addition respectively through the base stage of the triode Q1-Q5 of D18-22 to 5 electronic switching circuit of diode, the colelctor electrode of triode Q1-Q5 connects the 1-5 pin of single-chip microcomputer U1 respectively, the 6th of integrated circuit U1,9 pin connect the 6th of the integrated circuit U3 that automatically resets, 7 pin, the 18th, 19 pin connect by CRY, the oscillating circuit that C1 and C2 form, the 12nd pin connects NAND gate U5A, U5B and resistance R 19, R20, the bistable trigger-action circuit that switch S 1 is formed, the 8th pin is through not circuit U5-C, resistance R 27 connects the base stage of triode Q6, and the emitter stage of triode Q6 connects pulse width prewired circuit or pulse width timing circuit control input end.In the utility model, dial switch adopts BCD8421, and integrated circuit U1 adopts AT89C51, and the integrated circuit U3 that automatically resets adopts IMP813, and emitter follower U4 adopts LM324-A, and not circuit U5 adopts 74LS00.

This control circuit utilizes the size of control time dial switch (8421BCD sign indicating number) while and voltage, in dial switch control voltage amplitude (by resistance R 11-R17 dividing potential drop), 15 volts of voltages on the dial switch, isolate by the diode step-down, drive triode, make its saturation conduction, drag down the level of single-chip microcomputer IO mouth, provide a binary-coded decimal to single-chip microcomputer, change through chip internal, export one and show the same pulse of numerical value, reach the purpose of time and voltage Synchronization Control with dial switch.When dial gets to 15,15V voltage is given R11 on the one hand by dial, R13, the R15 power supply, thereby change the voltage of emitter follower input amplifier 3 pin, add to the Q6 colelctor electrode, on the other hand, voltage is also by diode D22, D20, D18 gives triode Q1, Q3, conducting voltage of Q5, the pull-up resistor R25 of control single chip computer time output, R23, R21 ground connection (low level), the level that single-chip microcomputer is read the IO mouth changes the back, and (level becomes 01010 by original 11111, after the inner negate of single-chip microcomputer, be metric 15), convert the BCD sign indicating number of IO mouth to metric time output, at last, voltage and time are added in colelctor electrode and the base stage of triode Q6 respectively, have just obtained time and the simultaneously controlled pulse of voltage on the emitter stage.

For example, a kind of capacitance energy storage type resistance welder, originally voltage-regulation is 0-3.99V, time is adjusted to 0-79ms, soldering tip pressure is adjusted to 1-70N, according to original parameter, be easy to occur " incorrect configuration ", welding machine is not worked or not prison welding occurred, defective work piece burns out electrode, use instead directly and do the welding parameter input, for example weld the above-mentioned voltage of the metal wire (enamel-covered wire) of Φ 0.1mm and time two groups of parameters and all change into and be arranged on 10 * 10 with the size in soldered enamel-covered wire line footpath or with the model of enamel-covered wire ^-2Mm (± 1), the weldingvoltage that is provided with of the welding machine inside of this moment is about 0.7V, and be 14 milliseconds weld interval, welding pressure is 1.1 newton, but, make operation become very easy and directly perceived, and reduced wrong configuration greatly owing to directly import with the line footpath size of soldered enamel-covered wire.

Claims (2)

1, the resistance spot weld welding machine of a kind of output pulse amplitude and width interlock control, constitute by main frame, head and soldering tip three parts, main frame is made up of impulse amplitude prewired circuit, pulse width prewired circuit, pulse width timing circuit, drive circuit, power switch circuit, feedback circuit, low-voltage power circuit, high-voltage power circuit and high-voltage control circuit, it is characterized in that connecting voltage and the time signal translation circuit of being made up of voltage toggle switch and single-chip microcomputer in the control input end of pulse width prewired circuit or pulse width timing circuit.

2, the resistance spot weld welding machine of a kind of pulse voltage as claimed in claim 1 and time interlock control, the composition that it is characterized in that voltage and time signal translation circuit be connected to: dial switch is connected the in-phase input end of emitter follower U4 respectively through resistance R 11-15, the output of U4 connects the colelctor electrode of triode Q6; Dial switch is in addition respectively through the base stage of the triode Q1-Q5 of D18-D22 to 5 electronic switching circuit of diode, the colelctor electrode of triode Q1-Q5 connects the 1-5 pin of integrated circuit U1 respectively, the 6th of integrated circuit U1,9 pin connect the 6th of automatically negative station integrated circuit U3,7 pin, the 18th, 19 pin connect by CRY, the oscillating circuit that C1 and C2 form, the 12nd pin connects NAND gate U5A, U5B and resistance R 19, R20, the bistable trigger-action circuit that switch S 1 is formed, the 8th pin is through not circuit U5-C, resistance R 27 connects the base stage of triode Q6, and the emitter stage of triode Q6 connects pulse width prewired circuit or pulse width timing circuit control input end.