CN104801812B - A kind of arc initiation device for vacuum brazing and striking method - Google Patents
A kind of arc initiation device for vacuum brazing and striking method Download PDFInfo
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- CN104801812B CN104801812B CN201510221290.7A CN201510221290A CN104801812B CN 104801812 B CN104801812 B CN 104801812B CN 201510221290 A CN201510221290 A CN 201510221290A CN 104801812 B CN104801812 B CN 104801812B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
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- Mechanical Engineering (AREA)
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Abstract
A kind of arc initiation device for vacuum brazing and striking method, belong to Vacuum Soldering Technology field.The arc initiation device of the present invention includes set, welding gun outer tube, welding gun inner tube and tantalum electrode on heater circuit, arc ignition circuit, welding gun, tantalum electrode is heated by the present invention by heater circuit, and be adjusted adding thermocurrent by adjustable resistance, simultaneously by arc ignition circuit to providing electric potential difference between tantalum electrode and weldment, again by progressively adding thermocurrent, until electric current punctures the argon medium between tantalum electrode and weldment, thus set up electric arc.After electric arc is set up, just can disconnect heater circuit, then by the adjustable resistance regulation striking electric current of arc ignition circuit, until meeting vacuum brazing technique requirement.The present invention, compared with traditional lifting starting the arc mode, has that striking operation is simpler, arcing initiation success rate is high, the automaticity high of arc process, and the cost of arc initiation device is cheaper.
Description
Technical field
The invention belongs to Vacuum Soldering Technology field, particularly relate to a kind of arc initiation device for vacuum brazing and striking method.
Background technology
Vacuum brazing furnace is as a kind of special equipment based on Vacuum Soldering Technology, and it can provide high vacuum environment, and makees with argon
For protection medium, welded by tantalum electrode butt-welding fitting, due to without brazing flux, it is possible to significantly improve the corrosion resistance of product.
For the use of vacuum brazing furnace, it is necessarily applied to arc stricking techniques when vacuum brazing, and traditional arc stricking techniques is generally adopted
The starting the arc mode that is an up, i.e. utilize tantalum electrode and weldment transcient short circuit time to promote rapidly welding gun to set up electric arc, this striking mode
Typically require and increase subtest voltage at welding gun and weldment two ends, judge whether are tantalum electrode and weldment by subtest voltage
Contact, increases back ground current at welding gun with weldment two ends simultaneously, realizes striking and arc maintenance by back ground current.
But, above-mentioned traditional striking mode exists cost height, striking operates complexity, arcing initiation success rate is low, automaticity is low,
The shortcomings such as tantalum electrode and the easy adhesion of weldment.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of arc initiation device for vacuum brazing and striking method, has
Feature cheap, that striking is simple to operate, arcing initiation success rate is high and automaticity is high.
To achieve these goals, the present invention adopts the following technical scheme that a kind of arc initiation device for vacuum brazing, including adding
Set, welding gun outer tube, welding gun inner tube and tantalum electrode on heater circuit, arc ignition circuit, welding gun, on described welding gun, the outside wall surface of set sets
Being equipped with the first negative contact, the outside wall surface at described welding gun outer tube is provided with the second negative contact, on the furnace wall of vacuum brazing furnace
Being provided with positive contact, add positive contact insulation sleeve between described positive contact and the furnace wall of vacuum brazing furnace, anode connects
First end is positioned at vacuum brazing furnace interior and contacts with weldment；Positive pole and first negative contact of described heater circuit are connected,
Negative pole and second negative contact of heater circuit are connected, and negative pole and second negative contact of described arc ignition circuit are connected, striking
The positive pole of circuit is connected with positive contact；
Described welding gun outer tube upper end is connected with set lower end on welding gun, adds insulating washer on welding gun outer tube and welding gun between set,
Welding gun outer tube lower end is connected with vacuum brazing furnace, adds outer tube insulation sleeve between welding gun outer tube and vacuum brazing furnace furnace wall；?
Overlapping top on described welding gun and be provided with argon inlet end cap, on welding gun, set is fixedly set in welding gun inner tube, welding gun inner tube upper pipes
Mouth is connected with the air inlet of argon inlet end cap；Described tantalum electrode one end is connected with welding gun inner tube lower end, tantalum electrode and welding gun
Connect by inner tube connector is fixing between inner tube；The described tantalum electrode other end passes through the welding gun outer tube lower end mouth of pipe and vacuum brazing furnace
Being connected, tantalum electrode is corresponding with weldment, is connected by outer pipe connections is fixing between tantalum electrode with welding gun outer tube.
Described heater circuit include the first transformator, the first rectifier bridge, the first inductance, the first electric capacity, the first ammeter, first
Voltmeter, the first adjustable resistance, the first normally opened terminal of D.C. contactor, the first binding post and the second binding post, described
The high-pressure side of one transformator is connected with 380V alternating current power supply, and the low-pressure side of the first transformator is connected with the end that exchanges of the first rectifier bridge,
The DC terminal positive pole of the first rectifier bridge and first inductance one end are connected, and the first inductance other end and the first binding post are connected；Described
The DC terminal negative pole of the first rectifier bridge and first adjustable resistance one end are connected, the first adjustable resistance other end and the second binding post phase
Even；Described first electric capacity, first voltmeter one end are connected with the DC terminal positive pole of the first rectifier bridge, the first electric capacity, the first voltage
The DC terminal negative pole of the table other end and the first rectifier bridge is connected；Described first ammeter is connected on the DC terminal positive pole of the first rectifier bridge
And between the first binding post；The described first normally opened terminal of D.C. contactor is arranged on DC terminal and first wiring of the first rectifier bridge
Between terminal, the second binding post.
Described first binding post and the first negative contact are connected, and the second binding post and the second negative contact are connected.
Described arc ignition circuit include the second transformator, the second rectifier bridge, the second inductance, the second electric capacity, the second ammeter, second
Voltmeter, the second adjustable resistance, the second normally opened terminal of D.C. contactor, the 3rd binding post and the 4th binding post, described
The high-pressure side of two transformators is connected with 380V alternating current power supply, and the low-pressure side of the second transformator is connected with the end that exchanges of the second rectifier bridge,
The DC terminal positive pole of the second rectifier bridge and second inductance one end are connected, and the second inductance other end and the 3rd binding post are connected；Described
The DC terminal negative pole of the second rectifier bridge and second adjustable resistance one end are connected, the second adjustable resistance other end and the 4th binding post phase
Even；Described second electric capacity, second voltmeter one end are connected with the DC terminal positive pole of the second rectifier bridge, the second electric capacity, the second voltage
The DC terminal negative pole of the table other end and the second rectifier bridge is connected；Described second ammeter is connected on the DC terminal positive pole of the second rectifier bridge
And between the 3rd binding post；The described second normally opened terminal of D.C. contactor is arranged on DC terminal and the 3rd wiring of the second rectifier bridge
Between terminal, the 4th binding post.
Described 3rd binding post is connected with positive contact, and the 4th binding post and the second negative contact are connected.
The striking method of the arc initiation device for vacuum brazing described in employing, comprises the steps:
Step one: before soldering starts, carries out evacuation to vacuum brazing furnace, makes vacuum meet vacuum brazing technique requirement, with
Time adjust argon flow amount, make argon flow amount meet vacuum brazing technique requirement；
Step 2: close the first normally opened terminal of D.C. contactor, makes the first binding post and the first negative contact phase of heater circuit
Connecting, make the second binding post of heater circuit and the second negative contact be connected, now tantalum electrode is initially powered up heating；Simultaneously
Close the second normally opened terminal of D.C. contactor, make the 3rd binding post of arc ignition circuit be connected with positive contact, make arc ignition circuit
The 4th binding post be connected with the second negative contact, between tantalum electrode and weldment provide electric potential difference；
Step 3: turn the resistance value of the first adjustable resistance, and then the slow electric current increasing tantalum electrode slowly down, continue electrified regulation
Tantalum electrode；
Step 4: tantalum electrode adds heat release light, when electric current punctures the argon between tantalum electrode and weldment, and with arc ignition circuit structure
Become loop, by the second ammeter can the current values of real time inspection arc ignition circuit, now complete striking；
Step 5: disconnect the first normally opened terminal of D.C. contactor, make heater circuit disconnect, then regulate the electricity of the second adjustable resistance
Resistance, it is achieved the regulation to arc ignition circuit current value, until meeting vacuum brazing technique requirement, now striking terminates.
Beneficial effects of the present invention:
Tantalum electrode is heated by the present invention by heater circuit, and is adjusted adding thermocurrent by adjustable resistance, leads to simultaneously
Cross arc ignition circuit to providing electric potential difference between tantalum electrode and weldment, then by progressively adding thermocurrent, until electric current to puncture tantalum electric
Argon medium between pole and weldment, thus set up electric arc.After electric arc is set up, just can disconnect heater circuit, then pass through striking
The adjustable resistance regulation striking electric current of circuit, until meeting vacuum brazing technique requirement.The present invention and traditional lifting starting the arc mode
Compare, there is the features such as striking operation is simpler, arcing initiation success rate is high, the automaticity of arc process is high and cheap.
Accompanying drawing explanation
Fig. 1 is a kind of arc initiation device structural representation for vacuum brazing of the present invention；
Fig. 2 is the heater circuit schematic diagram of the present invention；
Fig. 3 is the arc ignition circuit schematic diagram of the present invention；
In figure, 1 heater circuit, 2 arc ignition circuits, 3 welding guns overlap, 4 welding gun outer tubes, 5 first negative contacts, 6
Second negative contact, 7 welding gun inner tubes, 8 tantalum electrodes, 9 positive contacts, 10 inner tube connector, 11 outer tubes connect
Part, 12 argon inlet end caps, 13 insulating washers, 14 outer tube insulation sleeves, 15 positive contact insulation sleeves, 16 vacuum
Soldering oven, 17 weldments, B1 the first transformator, VD1 the first rectifier bridge, L1 the first inductance, C1 the first electric capacity, I 1
First ammeter, V1 the first voltmeter, R1 the first adjustable resistance, the normally opened terminal of K1 the first D.C. contactor, TB1
First binding post, TB2 the second binding post, B2 the second transformator, VD2 the second rectifier bridge, L2 the second inductance,
C2 the second electric capacity, I2 the second ammeter, V2 the second voltmeter, R2 the second adjustable resistance, K2 the second direct current contacts
The normally opened terminal of device, TB3 the 3rd binding post, TB4 the 4th binding post.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, 2, 3, a kind of arc initiation device for vacuum brazing, including heater circuit 1, arc ignition circuit 2, welding gun
Upper set 3, welding gun outer tube 4, welding gun inner tube 7 and tantalum electrode 8, overlap the outside wall surface of 3 on described welding gun and be provided with the first negative electrode and connect
5, the outside wall surface at described welding gun outer tube 4 is provided with the second negative contact 6, is provided with on the furnace wall of vacuum brazing furnace 16
Positive contact 9, adds positive contact insulation sleeve 15, anode between described positive contact 9 and the furnace wall of vacuum brazing furnace 16
Joint 9 one end is positioned at vacuum brazing furnace 16 inside and contacts with weldment 17；The positive pole of described heater circuit 1 and the first negative electrode
Joint 5 is connected, and negative pole and second negative contact 6 of heater circuit 1 are connected, the negative pole and second of described arc ignition circuit 2
Negative contact 6 is connected, and the positive pole of arc ignition circuit 2 is connected with positive contact 9；
Described welding gun outer tube 4 upper end is connected with overlapping 3 lower ends on welding gun, overlaps and add between 3 on welding gun outer tube 4 and welding gun
Insulating washer 13, welding gun outer tube 4 lower end is connected with vacuum brazing furnace 16, welding gun outer tube 4 and vacuum brazing furnace 16 furnace wall it
Between add outer tube insulation sleeve 14；Described welding gun overlaps 3 tops argon inlet end cap 12 is installed, welding gun overlaps 3 fixed covers
Being contained in welding gun inner tube 7, the welding gun inner tube 7 upper end mouth of pipe is connected with the air inlet of argon inlet end cap 12；Described tantalum electrode 8
One end is connected with welding gun inner tube 7 lower end, is connected by inner tube connector 10 is fixing between tantalum electrode 8 with welding gun inner tube 7；Institute
State tantalum electrode 8 other end to be connected with vacuum brazing furnace 16 by the welding gun outer tube 4 lower end mouth of pipe, tantalum electrode 8 and weldment 17 phase
Correspondence, is connected by outer pipe connections 11 is fixing between tantalum electrode 8 with welding gun outer tube 4.
Described heater circuit 1 include the first transformator B1, the first rectifier bridge VD1, the first inductance L1, the first electric capacity C1, first
Ammeter I1, the first voltmeter V1, the first adjustable resistance R1, the first D.C. contactor normally opened terminal K1, the first binding post
TB1 and the second binding post TB2, the high-pressure side of described first transformator B1 is connected with 380V alternating current power supply, the first transformator
The low-pressure side of B1 is connected with the end that exchanges of the first rectifier bridge VD1, the DC terminal positive pole of the first rectifier bridge VD1 and the first inductance L1
One end is connected, and the first inductance L1 other end and the first binding post TB1 are connected；The DC terminal negative pole of described first rectifier bridge VD1
Being connected with first adjustable resistance R1 one end, the first adjustable resistance R1 other end and the second binding post TB2 are connected；Described first
Electric capacity C1, first voltmeter V1 one end are connected with the DC terminal positive pole of the first rectifier bridge VD1, the first electric capacity C1, the first voltage
The DC terminal negative pole of Table V 1 other end and the first rectifier bridge VD1 is connected；Described first ammeter I1 is connected on the first rectifier bridge VD1
DC terminal positive pole and the first binding post TB1 between；Described first D.C. contactor normally opened terminal K1 is arranged on the first rectifier bridge
Between the DC terminal of VD1 and the first binding post TB1, the second binding post TB2.
Described first binding post TB1 and the first negative contact 5 are connected, the second binding post TB2 and the second negative contact 6
It is connected.
Described arc ignition circuit 2 include the second transformator B2, the second rectifier bridge VD2, the second inductance L2, the second electric capacity C2, second
Ammeter I2, the second voltmeter V2, the second adjustable resistance R2, the second D.C. contactor normally opened terminal K2, the 3rd binding post
TB3 and the 4th binding post TB4, the high-pressure side of described second transformator B2 is connected with 380V alternating current power supply, the second transformator
The low-pressure side of B2 is connected with the end that exchanges of the second rectifier bridge VD2, the DC terminal positive pole of the second rectifier bridge VD2 and the second inductance L2
One end is connected, and the second inductance L2 other end and the 3rd binding post TB3 are connected；The DC terminal negative pole of described second rectifier bridge VD2
Being connected with second adjustable resistance R2 one end, the second adjustable resistance R2 other end and the 4th binding post TB4 are connected；Described second
Electric capacity C2, second voltmeter V2 one end are connected with the DC terminal positive pole of the second rectifier bridge VD2, the second electric capacity C2, the second voltage
The DC terminal negative pole of Table V 2 other end and the second rectifier bridge VD2 is connected；Described second ammeter I2 is connected on the second rectifier bridge VD2
DC terminal positive pole and the 3rd binding post TB3 between；Described second D.C. contactor normally opened terminal K2 is arranged on the second rectifier bridge
Between DC terminal and the 3rd binding post TB3, the 4th binding post TB4 of VD2.
Described 3rd binding post TB3 is connected with positive contact 9, and the 4th binding post TB4 and the second negative contact 6 are connected
Connect.
In the present embodiment, in heater circuit 1,380V alternating current is converted to 40V alternating current through the first transformator B1, and 40V
Alternating current is converted to 60V unidirectional current through the first rectifier bridge VD1 again, and 60V unidirectional current will through the first inductance L1, the first electric capacity L2
Stable dc power supply the most uses, and after the first D.C. contactor normally opened terminal K1 closes, 60V stable dc power supply will act at
On first binding post TB1 and the second binding post TB2.
In arc ignition circuit 2,380V alternating current is converted to 110V alternating current through the second transformator B2, and 110V alternating current is again
Being converted to 160V unidirectional current through the first rectifier bridge VD1,160V unidirectional current will be the most steady through the first inductance L1, the first electric capacity L2
Determining DC source to use, after the first D.C. contactor normally opened terminal K1 closes, 160V stable dc power supply will act at the 3rd
On binding post TB3 and the 4th binding post TB4.
The striking method of the arc initiation device for vacuum brazing described in employing, comprises the steps:
Step one: before soldering starts, is adjusted to 1.7 × 10 by the vacuum of vacuum brazing furnace 16-2Pa～3.5 × 10-2Pa, makes
Vacuum meets striking requirement, adjusts argon flow amount, argon flow amount is adjusted to 100mL/min～120mL/min；
Step 2: close the first D.C. contactor normally opened terminal K1, makes the first binding post TB1 and first of heater circuit 1 cloudy
Pole joint 5 is connected, and makes the second binding post TB2 of heater circuit 1 and the second negative contact 6 be connected, now tantalum electrode
8 are initially powered up heating；It is closed at the second D.C. contactor normally opened terminal K2, makes the 3rd binding post TB3 of arc ignition circuit 2
It is connected with positive contact 9, makes the 4th binding post TB4 of arc ignition circuit 2 be connected with the second negative contact 6, for tantalum
Electric potential difference is provided between electrode 8 and weldment 17；
Step 3: turn the resistance value of the first adjustable resistance R1, and then the slow electric current increasing tantalum electrode 8 slowly down, be persistently energized
Heating tantalum electrode 8, until being adjusted to 120A by the electric current of tantalum electrode 8；
Step 4: tantalum electrode 8 adds heat release light, when electric current punctures the argon between tantalum electrode 8 and weldment 17, and and striking
Circuit 2 constitutes loop, by the second ammeter I2 can the current values of real time inspection arc ignition circuit 2, now complete striking；
Step 5: disconnect the first D.C. contactor normally opened terminal K1, make heater circuit 1 disconnect, then regulate the second adjustable resistance
The resistance value of R2, it is achieved the regulation to arc ignition circuit 2 current value, until meeting vacuum brazing technique requirement, now striking terminates.
Scheme in embodiment is also not used to limit the scope of patent protection of the present invention, all equivalence enforcement done without departing from the present invention
Or change, it is both contained in the scope of the claims of this case.
Claims (6)
1. the arc initiation device for vacuum brazing, it is characterised in that: include overlapping on heater circuit, arc ignition circuit, welding gun,
Welding gun outer tube, welding gun inner tube and tantalum electrode, on described welding gun, the outside wall surface of set is provided with the first negative contact, at described welding gun
The outside wall surface of outer tube is provided with the second negative contact, is provided with positive contact on the furnace wall of vacuum brazing furnace, connects at described anode
Head and the furnace wall of vacuum brazing furnace between add positive contact insulation sleeve, positive contact one end be positioned at vacuum brazing furnace interior and with
Weldment contacts；Positive pole and first negative contact of described heater circuit are connected, the negative pole of heater circuit and the second negative contact
Being connected, negative pole and second negative contact of described arc ignition circuit are connected, and the positive pole of arc ignition circuit is connected with positive contact；
Described welding gun outer tube upper end is connected with set lower end on welding gun, adds insulating washer on welding gun outer tube and welding gun between set,
Welding gun outer tube lower end is connected with vacuum brazing furnace, adds outer tube insulation sleeve between welding gun outer tube and vacuum brazing furnace furnace wall；?
Overlapping top on described welding gun and be provided with argon inlet end cap, on welding gun, set is fixedly set in welding gun inner tube, welding gun inner tube upper pipes
Mouth is connected with the air inlet of argon inlet end cap；Described tantalum electrode one end is connected with welding gun inner tube lower end, tantalum electrode and welding gun
Connect by inner tube connector is fixing between inner tube；The described tantalum electrode other end passes through the welding gun outer tube lower end mouth of pipe and vacuum brazing furnace
Being connected, tantalum electrode is corresponding with weldment, is connected by outer pipe connections is fixing between tantalum electrode with welding gun outer tube.
A kind of arc initiation device for vacuum brazing the most according to claim 1, it is characterised in that: described heater circuit bag
Include the first transformator, the first rectifier bridge, the first inductance, the first electric capacity, the first ammeter, the first voltmeter, the first adjustable electric
Resistance, the first normally opened terminal of D.C. contactor, the first binding post and the second binding post, the high-pressure side of described first transformator with
380V alternating current power supply is connected, and the low-pressure side of the first transformator is connected with the end that exchanges of the first rectifier bridge, the DC terminal of the first rectifier bridge
Positive pole and first inductance one end are connected, and the first inductance other end and the first binding post are connected；The DC terminal of described first rectifier bridge
Negative pole and first adjustable resistance one end are connected, and the first adjustable resistance other end and the second binding post are connected；Described first electric capacity,
First voltmeter one end is connected with the DC terminal positive pole of the first rectifier bridge, the first electric capacity, the first voltmeter other end and the first rectification
The DC terminal negative pole of bridge is connected；Described first ammeter is connected between the DC terminal positive pole of the first rectifier bridge and the first binding post；
The described first normally opened terminal of D.C. contactor be arranged on the DC terminal of the first rectifier bridge and the first binding post, the second binding post it
Between.
A kind of arc initiation device for vacuum brazing the most according to claim 2, it is characterised in that: described first terminals
Son is connected with the first negative contact, and the second binding post and the second negative contact are connected.
A kind of arc initiation device for vacuum brazing the most according to claim 1, it is characterised in that: described arc ignition circuit bag
Include the second transformator, the second rectifier bridge, the second inductance, the second electric capacity, the second ammeter, the second voltmeter, the second adjustable electric
Resistance, the second normally opened terminal of D.C. contactor, the 3rd binding post and the 4th binding post, the high-pressure side of described second transformator with
380V alternating current power supply is connected, and the low-pressure side of the second transformator is connected with the end that exchanges of the second rectifier bridge, the DC terminal of the second rectifier bridge
Positive pole and second inductance one end are connected, and the second inductance other end and the 3rd binding post are connected；The DC terminal of described second rectifier bridge
Negative pole and second adjustable resistance one end are connected, and the second adjustable resistance other end and the 4th binding post are connected；Described second electric capacity,
Second voltmeter one end is connected with the DC terminal positive pole of the second rectifier bridge, the second electric capacity, the second voltmeter other end and the second rectification
The DC terminal negative pole of bridge is connected；Described second ammeter is connected between the DC terminal positive pole of the second rectifier bridge and the 3rd binding post；
The described second normally opened terminal of D.C. contactor be arranged on the DC terminal of the second rectifier bridge and the 3rd binding post, the 4th binding post it
Between.
A kind of arc initiation device for vacuum brazing the most according to claim 4, it is characterised in that: described 3rd terminals
Son is connected with positive contact, and the 4th binding post and the second negative contact are connected.
6. the striking method of the employing arc initiation device for vacuum brazing described in claim 1, it is characterised in that: include as follows
Step:
Step one: before soldering starts, carries out evacuation to vacuum brazing furnace, makes vacuum meet vacuum brazing technique requirement, with
Time adjust argon flow amount, make argon flow amount meet vacuum brazing technique requirement；
Step 2: close the first normally opened terminal of D.C. contactor, makes the first binding post and the first negative contact phase of heater circuit
Connecting, make the second binding post of heater circuit and the second negative contact be connected, now tantalum electrode is initially powered up heating；Simultaneously
Close the second normally opened terminal of D.C. contactor, make the 3rd binding post of arc ignition circuit be connected with positive contact, make arc ignition circuit
The 4th binding post and the second negative contact be connected, between tantalum electrode and weldment provide electric potential difference；
Step 3: turn the resistance value of the first adjustable resistance, and then the slow electric current increasing tantalum electrode slowly down, continue electrified regulation
Tantalum electrode；
Step 4: tantalum electrode adds heat release light, when electric current punctures the argon between tantalum electrode and weldment, and with arc ignition circuit structure
Become loop, by the second ammeter can the current values of real time inspection arc ignition circuit, now complete striking；
Step 5: disconnect the first normally opened terminal of D.C. contactor, make heater circuit disconnect, then regulate the electricity of the second adjustable resistance
Resistance, it is achieved the regulation to arc ignition circuit current value, until meeting vacuum brazing technique requirement, now striking terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510221290.7A CN104801812B (en) | 2015-05-04 | 2015-05-04 | A kind of arc initiation device for vacuum brazing and striking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510221290.7A CN104801812B (en) | 2015-05-04 | 2015-05-04 | A kind of arc initiation device for vacuum brazing and striking method |
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| CN104801812A CN104801812A (en) | 2015-07-29 |
| CN104801812B true CN104801812B (en) | 2016-09-14 |
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| 一种新型的焊接技术——空心阴极真空电弧焊;韩小宾等;《航空制造工程》;19980630(第3期);第16-18页 * |
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