CN2206695Y

CN2206695Y - Welding machine with temp. sensor

Info

Publication number: CN2206695Y
Application number: CN 94217431
Authority: CN
Inventors: 邓一然
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-21
Filing date: 1994-07-21
Publication date: 1995-09-06
Anticipated expiration: 2004-07-21

Abstract

The utility model provides a welding machine for temperature senor, which is mainly used for welding the temperature sensors of 0.01-0.5 mm thermocouples, platinum resistance thermometer connecting lines, etc. The welding machine is mainly composed of a controlled silicon voltage regulating circuit, a rectification circuit, a rectification voltage-stabilizing circuit, a welding circuit, a cutting circuit, timing circuits, a digital display circuit, etc. The welding point is smooth and bright, the welding successful rate can reach more than 98 percent, the noble metal loss is reduced, and the production cost is reduced because the ordinary AC electric welding is changed into DC electric welding. The output power and the seven segment digital tube butt welding are controlled by adopting double timing circuits and controlled silicon, and the counting display is carried out by cutting. The regulation is convenient, and the cutting is automatically controlled by an electric machine so that the work efficiency can be improved by one to two times.

Description

Welding machine with temp. sensor

The utility model provides a kind of temperature sensor welding instrument, is mainly used in thermocouple, the platinum resistance thermometer line equitemperature sensor of welding 0.01-0.5mm.

Temperature sensor element is tiny, required precision is high, existing temperature sensor welding instrument generally adopts alternating current welding and manual shearing, poor welding quality, shear rate is slow and also need spend the plenty of time to check the weldment number, cause poor product quality, loss greatly, inefficiency, production cost be higher.

The utility model is at above existing problems, and its purpose is to provide a kind of temperature sensor welding instrument that adopts direct current to weld, can count automatically, shear automatically, control automatically weld interval, Adjustable Output Voltage.

The utility model changes general alternating current and is welded as the direct current welding, the solder joint garden is bright, be welded into power can reach more than 98%, reduced the precious metal loss, reduced production cost, employing plesichronous circuit and controllable silicon adjusting power output and seven segment digital tubes are counted demonstration to welding, shearing, and the shearing use is electronic, machinery is controlled automatically, improved shear rate and precision, can increase work efficiency 1-2 times.

The utility model is made up of input power supply 1, relay J, indicator lamp 11, it is characterized in that: also comprise silicon-controlled voltage regulation circuit 2, rectifier power source 3, welding circuit 4, timing circuit 5, shear circuit 6, digital display circuit 7, regulator rectifier circuit 8, owing to adopt plesichronous and controllable silicon adjusting power output and seven segment numerical demonstration is counted in welding, shearing respectively, make and shear control automatically, thereby improved operating efficiency effectively.

Fig. 1 is a circuit structure diagram of the present utility model.

Fig. 2 is a circuit structure block diagram of the present utility model.

Fig. 3 is an outer casing construction drawing of the present utility model.

Fig. 4 is a NE556 integrated circuit wiring diagram of the present utility model.

Fig. 5 is the use structure chart of motor D in the utility model.

Fig. 6 is that motor of the present utility model is sheared the accessory structure chart.

1-6 is described in detail the utility model below in conjunction with accompanying drawing.

The utility model is by input power supply 1, relay J, indicator lamp 11 is formed, it is characterized in that: also comprise silicon-controlled voltage regulation circuit 2, rectifier power source 3, welding circuit 4, timing circuit 5, shear circuit 6, digital display circuit 7, regulator rectifier circuit 8, silicon-controlled voltage regulation circuit 2 one ends join with input power supply 1, the other end links to each other by power transformer B2 rectifier power source 3, rectifier power source 3 directly is connected with welding circuit 4 with shearing circuit 6, welding circuit 4 links to each other with timing circuit 5 by transformer B3, the signal of shearing circuit 6 and timing circuit 5 outputs is coupled to two digital display circuits 7 by coupling capacitance C203 and C411 and shows, timing circuit 5 is connected with indicator lamp 11 with relay J respectively with resistance R 408 by triode T3, the contact of relay J is connected with the power line of silicon-controlled voltage regulation circuit 2, input power supply 1 links to each other with regulator rectifier circuit 8 by transformer B4, regulator rectifier circuit 8 direct and timing circuits 5, digital display circuit 7 links to each other.Silicon-controlled voltage regulation circuit 2 passes through resistance R 101 and two anti-phase Zener diode DW1 that connect by the bridge rectifier that four diode D101-D104 constitute, the DW2 parallel connection, link to each other with the second base stage b2 of unijunction transistor VT by resistance R 102 again, resistance R 103 links to each other with capacitor C 101 with the emitter e of unijunction transistor VT with potentiometer RW1 polyphone back, one group of coil polyphone of the first base stage b1 of unijunction transistor VT and transformer B1, another group coil one end of transformer B1 links to each other with the control utmost point g of controllable silicon T1, one end is connected with input power supply 1, and resistance R 104 is connected with capacitor C 102 afterwards and the anode a of controllable silicon T1, negative electrode b parallel connection.Link to each other with shear motor D after shearing bridge rectifier that circuit 6 is made of four diode D201-D204 and filter capacitor C201 parallel connection, contact with resistance R 201 after capacitor C 203 and the C202 parallel connection.Welding circuit 4 is linked to each other with bridge heap D heap by transformer B2, connects with resistance R 301 again, and voltmeter V links to each other with transformer B3 with R301 parallel connection, while D heap, and voltmeter V two ends link to each other with the welding out-put supply again.Timing circuit 5 adopts integrated circuit NE556(NE555 or D-trigger or JK-trigger) the formation timing circuit, 14 pin of NE556 connect the input power positive end, 4,10 pin are that reset terminal also is connected with the input power positive end, 7 pin are that earth terminal is connected with the negative terminal of power supply, 3, be connected with the negative terminal of power supply behind 11 pin external capacitor C403 and the C406,6,8 pin are by capacitor C 402, C405 links to each other with 5 pin with triode T2 respectively, 5,9 pin respectively with resistance R 408, connect with indicator lamp (light emitting diode D light 1) and triode T3 again after the R411 series connection, 1 pin and 2 pin, 12 pin directly are connected back outer meeting resistance R405 respectively with 13 pin, potentiometer R406, capacitor C 404 and resistance R 410, trimmer potentiometer R409, electric capacity 407, the colelctor electrode of triode T3 and the coil of relay J and diode D407, resistance R 412, capacitor C 411 links to each other, C411 links to each other with three digit counters 7 again, and resistance R 412 links to each other with light emitting diode D light 2 again.Regulator rectifier circuit 8 links to each other with input 1, the common port 3 of positive integrated regulator W7815 after being linked to each other with bridge rectifier D 401-D404 by transformer B4, and the output 2 of W7815, common port 3 link to each other with timing circuit 5, digital display circuit 7 respectively.Shear motor D links to each other with shear knife cutting blade 9 in being loaded on a shear platform 10, and shear platform 10 is made of base 12, shearing platform 13, shell 14, carbon-point 15, switch 16.

The utility model operation principle: behind (1) input power supply 1 input 220V, the 50HZ alternating current, but input silicon regulating circuit 2: output pulsation direct current, the mu balanced circuit step-down slicing that constitutes through resistance R 101, Zener diode DW1, DW2 after bridge rectifier D 101-D104 rectification, more stable trapezoidal wave voltage more than the output 18V, all change the variation of supply voltage on the R101 voltage change by DW1, thereby guarantee that output voltage do not imported the influence of variation, can make Zener diode DW1 be operated in zener region reliably according to the value of R101; Mu balanced circuit is a resistance R 102 simultaneously, R103, potentiometer RW1, capacitor C 101, the relaxation oscillations circuit that unijunction transistor VT and pulse transformer B1 constitute provides 18-19V trapezoidal wave voltage, capacitor C 101 in the tension and relaxation circuit and resistance R 103, RW1 constitutes charging circuit, capacitor C 101 is by the emitter stage of VT, the first base stage b1 and pulse transformer B1 primary coil constitute discharge circuit, because the negative resistance charactertistic of unijunction transistor VT, be charged to the crest voltage Vp of VT when capacitor C 101, when being Vc=Vp, the VT conducting, capacitor C 101 is passed through e, b1, the B1 discharge, impedance between emitter stage and resistance R 103 and the potentiometer Rw1 is very little at this moment, the very fast end of discharging, be that voltage on the capacitor C 101 is when reducing to the valley point voltage Vv of VT, VT ends, and is equivalent to emitter stage and the resistance R 103 of VT, potentiometer Rw1 open circuit.Capacitor C 101 charges to Vp, VT conducting again again, on b1, form the sawtooth pulse signal of many repetitions, when all timings of resistance R 103, capacitor C 101, potentiometer Rw1(pressure regulation turn-knob) more little, fast more, the capacitor C 101 of charging discharges and recharges and repeats soon more, and its frequency is high more, trigger controllable silicon T1 with it, controllable silicon shifts to an earlier date conducting, and the angle of flow strengthens, and power output increases; Otherwise, Rw1 increases, capacitor C 101 charging rates slow down, repeating signal frequency on the VT unijunction transistor b1 reduces, and triggers controllable silicon, and then the angle of flow reduces, power output reduces, so by regulating the size of Rw1, just can regulate the silicon controlled power output, thereby can obtain required welding, shearing voltage.When the sawtooth waveforms on the first base stage b1 of VT unijunction transistor passes through the primary coil of pulse transformer B1, pay a limit and induce same waveform, trigger controllable silicon, thus the power output of control controllable silicon T1.R102 as thermo-compensator, Dw2 also as the temperature-compensating of Dw1, resistance R 104,102 pairs of bidirectional triode thyristors of capacitor C carry out overvoltage protection, voltage on the capacitor C 102 can not suddenly change, and overvoltage all occurs in very short time, utilize C102 to absorb superpotential energy, can not burn out between controllable silicon anode, negative electrode because of overvoltage; R104 limits the discharge current of C102 and prevents that capacitor C 102 and inductance coil B2 from vibrating.Power transformer B2 output 0-28V voltage, through bridge heap D heap rectification output direct current weldingvoltage, the D heap is selected 35-40 peace bridge heap for use, R301 adjusts resistance the zero point of voltmeter V, select 100-110 Ω wire-wound resistor for use, fluctuation direct current to bridge rectifier output also has filter action, and V is a 0-30V pointer direct current voltmeter, draws two power supply output lines at its two ends for direct current welding (binding post).B3 can use the 3W220/12V transformer, removes output and uses φ 2mm enamel-covered wire around the 5-10 circle, will be newly around enamel-covered wire one side and source of welding current anode polyphone, and another edge joint timing circuit is partly.Commutating voltage is through R301 circulation, one direct current electric current is arranged by coil on the former limit of B3, minimum to dc impedance because of inductance coil, direct current passes through smoothly, the secondary side coil induced electromotive force is 0, induced-current is 0 also, and the voltage during welding on the R301 descends suddenly has a big electric current to flow through coil, produces induced electromotive force in the coil, and formation electric current, D405 delivers to timing circuit by diode, and every welding is once with once faradic formation, and B3 once pulse exports.Timing circuit 5 will be imported the 220V50HZ power supply transformation of power supply 1 input by transformer B4, output 18V alternating voltage is through the D401-D404 rectification, obtain 22-24V DC voltage comparatively stably after the C410 filtering, one the tunnel powers to relay J through diode D406, one the road from three terminal regulator W7815 1, the input of 3 ends, 2, the 15V DC voltage that the output of 3 ends is stable, input capacitance C409 is used to improve ripple in the mu balanced circuit, suppress overvoltage, output capacitance C408 is used to improve the transient response of load, and the DC voltage of exporting 15V through mu balanced circuit provides dc source for timing circuit and numeral show circuit 7.D405, R401, C401 constitute wave detector, unidirectional positive pulse is exported in diode D405 detection, R401, C401 constitute integrating circuit can be eliminated high frequency, keep low frequency, the output average current, make the wave detector output signal not influenced by the input signal power, the average direct current signal that the modulator that R402, T2, C402, R403 constitute is sent wave detector here is modulated into square-wave signal, triggers NE556 through the C402 coupling.A NE556 inside is made of two NE555, they and public earth terminal (7 pin) and Vcc end (14 pin).

1,2,3,4,5,6,7 and 14 pin constitute a NE555,8,9,10,11,12,13,14 and 7 pin constitute another NE555, their separate operations, effect because of inner " not gate " circuit, their

trigger end

6,8 pin and output are anti-phase, in timing circuit with

NE556

4,10,14 pin connect positive 15V power end, make two NE555 be in monostability, by R404, R407 connects 6, when 8 pin and positive 15V power end stable state,

trigger end

6,8 pin all are in high level,

output

5,9 pin all are in low level, D light 1(welds indicator lamp) not luminous, not conducting of triode T3, the power supply of being carried by diode D406 makes D light 2 luminous (ready light is bright), 3,11 pin are the control voltage end, meet C403 respectively, C406, bypass is from the ripple of power supply, 2,12 pin are the threshold value end, its effect is when output 5, when 9 pin are triggered to high level, just spying on lifting external definition capacitance voltage, 1,13 pin are discharge end, its effect is when output is triggered to high level, inner triode ends, the charging of permission external capacitor, when 5, when 9 pin are low level, its effect is by inner triode discharge, the discharge end of two NE555 is terminated at their threshold value respectively, resistance R 405 in the external timing circuit of difference, R406, capacitor C 404 and resistance R 410, R409, capacitor C 407, output 5 as NE556, when 9 pin are triggered to high level, the timing circuit charging, booster tension is when charging capacitor voltage reaches 2/3Vcc,

output

5,9 pin are turned to low level again.When R405 and C404, R410 and C407 are certain value, regulator potentiometer R406(weld interval), inner trimmer potentiometer R409 just can regulate the charging interval, thereby to two timers regularly length control.When the square-wave signal of C402 conveying triggers 6 pin of NE556,6 pin are triggered to low level, 5 pin output high level, indicator lamp D light 1 is lighted, and this moment, capacitor C 404 began charging, when capacitor C 404 is charged to 2/3Vcc, 5 pin by the high level transition to low level, produce a negative pulse when 5 pin transitions on C405, C405 is coupled to trigger end 8 pin, and the result of triggering makes 9 pin be turned to high level, triode T3 conducting, there is electric current to pass through in the relay J, its normally opened contact adhesive, normally closed opening, welding is sheared power supply and is disconnected, D light 2 extinguishes, and when capacitor C 407 was charged to 2/3Vcc, 9 pin were turned to low level, T3 ends, relay discharges, and welding is sheared voltage and recovered, and D light 2 is luminous.Undersuing is coupled to digital display circuit 7 through C411 and welds counting.R402, R408, R411, R412 are current-limiting resistance in the timing circuit.Timing circuit can also constitute with two NE555 or D-trigger or JK-trigger.

(2) SCR control transformer B2 output 0-18V alternating current is for shearing circuit power, shear circuit and shear (binding post) for shear motor D through D201-D204 bridge rectifier, C201 filtering output direct current, after R201, C202 composition integrating circuit averages shear signal, be coupled to digital display circuit 7 by coupling capacitance C203 and shear counting.The single line of motor D meets a power switch K, and the control motor is sheared, and fixes a shear knife on the rotor silk material after welding is sheared.

(3) the counting display circuit adopts seven sections LED luminous tubes of 15V power supply three digit counters to show, the 15V power supply directly and timing circuit join, the zero clearing line of three digit counters is external.Relay J provides 22-24V dc source by diode D406, makes its reliably working under rated voltage, and the induced electricity that produces when diode D407 disconnects for relay provides a path, makes relay delay to discharge, and simultaneously triode T3 is shielded.

Claims

1, a kind of temperature sensor welding instrument, by input power supply 1, relay J, indicator lamp 11 is formed, it is characterized in that: also comprise silicon-controlled voltage regulation circuit 2, rectifier power source 3, welding circuit 4, timing circuit 5, shear circuit 6, digital display circuit 7, regulator rectifier circuit 8, silicon-controlled voltage regulation circuit 2 one ends join with input power supply 1, the other end links to each other with rectifier power source 3 by power transformer B2, rectifier power source 3 directly is connected with welding circuit 4 with shearing circuit 6, welding circuit 4 links to each other with timing circuit 5 by transformer B3, the signal of shearing circuit 6 and timing circuit 5 outputs is coupled to two digital display circuits 7 by coupling capacitance C203 and C411, timing circuit 5 is connected with indicator lamp 11 with relay J respectively with resistance R 408 by triode T3, the contact of relay J is connected with the power line of silicon-controlled voltage regulation circuit 2, input power supply 1 links to each other with regulator rectifier circuit 8 by transformer B4, regulator rectifier circuit 8 direct and timing circuits 5, digital display circuit 7 links to each other.

2, by the described temperature sensor welding of claim 1 instrument, it is characterized in that: silicon-controlled voltage regulation circuit 2 passes through resistance R 101 and two anti-phase Zener diode DW1 that connect by the bridge rectifier that four diode D101-D104 constitute, the DW2 parallel connection, link to each other with the second base stage b2 of unijunction transistor VT by resistance R 102 again, resistance R 103 links to each other with capacitor C 101 with the emitter e of unijunction transistor VT with potentiometer RW1 polyphone back, the first base stage b1 of unijunction transistor VT connects with one group of coil of transformer B1, another group coil of transformer B1, one end links to each other with the control utmost point g of controllable silicon T1, one end is connected with input power supply 1, and resistance R 104 is connected with capacitor C 102 afterwards and the anode a of controllable silicon T1, negative electrode b parallel connection.

3, by the described temperature sensor welding of claim 1 instrument, it is characterized in that: link to each other with shear motor D after shearing bridge rectifier that circuit 6 is made of four diode D201-D204 and filter capacitor C201 parallel connection, contact with resistance R 201 after capacitor C 203 and the C202 parallel connection.

4, by the described temperature sensor welding of claim 1 instrument, it is characterized in that: welding circuit 4 is linked to each other with bridge heap D heap by transformer B2, connects with resistance R 301 again, and voltmeter V is in parallel with R301, the D heap is contacted with transformer B3 simultaneously, and the two ends of voltmeter link to each other with the welding out-put supply again.

5, by the described temperature sensor welding of claim 1 instrument, it is characterized in that: timing circuit 5 adopts integrated circuit NE556(NE555 or D-trigger or JK-trigger) the formation timing circuit, 14 pin of NE556 connect the input power positive end, 4,10 pin are that reset terminal also is connected with the input power positive end, 7 pin are that earth terminal is connected with the negative terminal of power supply, 3, be connected with the negative terminal of power supply behind 11 pin external capacitor C403 and the C406,6,8 pin are by capacitor C 402, C405 links to each other with 5 pin with triode T2 respectively, 5,9 pin respectively with resistance R 408, connect with indicator lamp (light emitting diode D light 1) and triode T3 again after the R411 series connection, 1 pin and 2 pin, 12 pin directly are connected back outer meeting resistance R405 respectively with 13 pin, potentiometer R406, capacitor C 404 and resistance R 410, trimmer potentiometer R409, electric capacity 407, the colelctor electrode of triode T3 and the coil of relay J and diode D407, resistance R 412, capacitor C 411 links to each other, C411 links to each other with digital display circuit 7 again, and resistance R 412 links to each other with light emitting diode D light 2 again.

6, by the described temperature sensor welding of claim 1 instrument, it is characterized in that: regulator rectifier circuit 8 by transformer B4 with after bridge rectifier D 401-D404 links to each other, link to each other with input 1, the common port 3 of positive integrated regulator W7815, the output 2 of W7815, common port 3 link to each other with timing circuit 5, digital display circuit 7 respectively.

7, by the described temperature sensor of claim 3 welding instrument, it is characterized in that: shear motor D links to each other with shear knife cutting blade 9 in being loaded on a shear platform 10.

8, by the described temperature sensor welding of claim 7 instrument, it is characterized in that: shear platform 10 is made of base 12, shearing platform 13, shell 14, carbon-point 15, switch 16.