CN1042856A - Energy-conservation omnicharacteristic electric welding machine - Google Patents
Energy-conservation omnicharacteristic electric welding machine Download PDFInfo
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- CN1042856A CN1042856A CN 88108066 CN88108066A CN1042856A CN 1042856 A CN1042856 A CN 1042856A CN 88108066 CN88108066 CN 88108066 CN 88108066 A CN88108066 A CN 88108066A CN 1042856 A CN1042856 A CN 1042856A
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- welding machine
- energy
- omnicharacteristic
- conservation
- coil
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Abstract
Energy-conservation omnicharacteristic electric welding machine is a kind of manual arc welding machine, and the secondary coil of this welding machine is made up of electromotive force coil and leakage field coil.Two groups of coils are all devoted oneself to work during the starting striking, after electric arc ignites, can excise the leakage field winding automatically under the control of autoelectrinic circuit, use electromotive force coil supply load electric current separately.Because the voltage of electromotive force coil designs by the electric arc operating voltage basically.Therefore apparent energy, volume, weight, cost, the energy loss of this welding machine all dwindle about 1 times than common welding machine.Can in whole district's segment limit of static characteristic of arc curve, work again simultaneously.Therefore can also weld the following thin plate of 1mm.
Description
The present invention relates to a kind of manual arc welding machine.
All there is three big shortcoming in existing manual arc welding machine:
A. the active power of electric welding machine only account for welding machine apparent energy 50%, the reactive power of visible welding machine is very big, the open circuit loss of electric welding machine, load loss are all very big, energy waste is very big.
B. very big owing to apparent energy, and make weight, volume, the cost of electric welding machine all very big.
C. the external behavior curve of electric welding machine can not adapt to the requirement of the whole sections of arc welding transfer curve.Particularly at welding current less than the section below the 30A, just there is not stable operating point in welding machine, this external behavior curve that it is described is incomplete to the requirement of welding current characteristics.So existing manual arc welding machine can not the thin plate of throat thickness below 1MM.
Purpose of the present invention, provide a kind of energy-conservation omnicharacteristic electric welding machine, its volume and weight dwindles nearly 1 times than existing welding machine, and it has not only overcome the shortcoming that existing welding machine wastes energy, and makes the requirement of the suitable static characteristic of arc curve whole district of the power supply external behavior curve section of electric welding machine simultaneously.Making electric welding machine can throat thickness be the following thin plate of 1MM.
Invention is achieved in that
There is a tap at 1/2 place of the secondary coil of energy-conservation omnicharacteristic electric welding machine, and coil is divided into two partly.Wherein the leakage field of half left and right sides coil design is very little, and the coil impedance pressure drop is very little, is called the electromotive force coil, operating voltage (about 35V) when it mainly provides welding, and the leakage field of the coil design about second half is very big, is called the leakage field coil, and impedance voltage drop is very big.The unloaded striking voltage of whole winding reaches welding floating voltage standard (about 75V).
In parallel again after the output of coil and tap terminals are connected two bidirectional triode thyristors respectively, these two bidirectional triode thyristors at any time can only have a conducting, that is to say that these two controllable silicons play the role of changing.As without thyristor commutation, also can adopt the mechanical electric apparatus commutation.At silicon controlled and wiring connect again a saturable reactor and signal transformer, form welding circuit with welding rod, workpiece then.
When striking, need high voltage to produce the short-circuit arc electric current, the bidirectional triode thyristor conducting of secondary coil end at this moment, and the controllable silicon of tap terminals turn-offs.So whole voltages of secondary coil (about 75V) all through saturable reactor, signal transformer, be added between welding rod and the workpiece, make electric arc be easy to light, after electric arc ignites, the signal transformer is sent current signal and is delayed time through electronic control circuit, after the amplification, make two bidirectional triode thyristors change original conducting state, make the bidirectional triode thyristor conducting of tap terminals, and the bidirectional triode thyristor of secondary coil end turn-offs.That is to say the leakage field winding is quit work, only remaining electromotive force coil working, this moment, the output voltage of welding transformer secondary coil was 35～40V.
According to the requirement of static characteristic of arc curve, the operating voltage during welding only needs about 30V.Therefore the voltage of secondary coil generation can satisfy the needs of welding job voltage fully.
Hence one can see that, the apparent energy design of electric welding machine, can determine by actual welding voltage and actual welding electric current fully, usually the maximum actual welding operating voltage of manual arc welding machine has only 1/2 of floating voltage, and the apparent energy of visible energy-conservation omnicharacteristic welding machine can be dwindled 1 times than the apparent energy of common welding machine.
The omnicharacteristic index of the generator characteristic curve of this welding machine is realized by saturable reactor and signal transformer and closed control circuit.Closed control circuit adopts the part circuit of Chinese patent 88106316,9, adds one group of trigger circuit in addition again, under the electromagnetic property effect of saturable reactor and the automatic control effect of closed loop circuit, makes the electric arc of electric welding machine highly stable, and welding quality is fine.
In sum, energy-conservation omnicharacteristic welding machine can make the iron core of welding machine, and the weight and the reactive power of coil reduce significantly, save a large amount of electric energy and cost, still can make arc burning stable in the work of little electric current section simultaneously, make the electric welding function stable in whole district's segment limit of electric arc static characteristic curve
Meaning of the present invention is fundamentally to have solved the shortcoming that existing electric welding machine wastes energy, a large amount of silicon steel sheets and copper material have been saved simultaneously again, reduce the cost of welding machine, fundamentally overcome the shortcoming that existing manual arc welding machine can not weld thin plate on the other hand again.
Below by the narration of embodiment and accompanying drawing thereof, describe the present invention in detail:
Accompanying drawing: energy-conservation omnicharacteristic electric welding machine schematic circuit.
Symbology is as follows among the figure:
DH: welding transformer A.C: secondary coil output
B: secondary coil tap R
0: short-circuit resistance
CP: bidirectional triode thyristor J
K1, J
K2: often the opening of relay, normally-closed contact
CT: signal current transformer BH: saturable reactor
ZL: saturable reactor control winding P: welding rod
O: workpiece DP: rectifier bridge
R
1R
34: resistance and potentiometer D
1D
9: diode
G
1G
3: triode C
1C
8: capacitor
LM: operational amplifier integrated package LV: voltage comparator integrated package
J: midget relay
In the accompanying drawings, the secondary coil of welding transformer DH is by tap B separated into two parts: the AB coil is called the leakage field coil, and its impedance voltage drop is very big, and the BC coil claims the electromotive force coil, and its impedance voltage drop is very little.It can keep the about 35V～40V of output voltage all the time, and the unloaded total voltage of secondary coil AC is about 75V, meets the floating voltage standard of conventional electric welding machine.
When welding machine is in Light Condition, bidirectional triode thyristor CP
1Conducting, CP
2End, this moment, the starting striking current loop of secondary coil was: brought out by A and send out, through short-circuit resistance R
0, bidirectional triode thyristor CP
1, welding rod P, workpiece O, saturable reactor BH, signal transformer CT is after the C end is formed the loop.Striking voltage between welding rod and the workpiece is the floating voltage of welding transformer at this moment, and therefore about 75V is easy to make electric arc to light.
After striking is lighted, bidirectional triode thyristor CP
2Conducting immediately, and CP
1By leakage field coil and major loop are disconnected, this moment, the current loop of secondary coil was: brought out by B and send out, through bidirectional triode thyristor CP
2, welding rod P, workpiece O, saturable reactor BH, signal transformer CT, after the C end is formed the loop, the loop of this moment is called the weld load loop.The size of welding current can be regulated by the control winding current of saturable reactor BH.
Because regulating the current value of saturable reactor control winding ZL is very easily, so the minimum current value of welding machine can be adjusted to and levels off to 0.
As from the foregoing, what be in frequent duty is the electromotive force coil, supplies with the weld load electric current by it.So the apparent energy of energy-conservation omnicharacteristic electric welding machine can be decided by the terminal voltage of electromotive force coil and the product of nominal load current.Since the terminal voltage of electromotive force coil have only common welding machine secondary voltage about 1/2, so the welding transformer power of energy-conservation omnicharacteristic welding machine only is about half of common welding machine.
Because the leakage field coil is just just the working in a flash of striking, so the sectional area of wire of leakage field coil can be very little.Short-circuit resistance R
0Effect be to place restrictions on as bidirectional triode thyristor CP
2Conducting and CP
1The short-circuit current value that is produced in a flash that does not turn-off as yet.
Making two bidirectional triode thyristor commutation work is to be finished by one group of time-delay electronic relay.The time-delay electronic relay is by voltage comparator LV integrated package, resistance R
24R
34, capacitor C
8, diode D
8, midget relay J forms.Because the time-delay of time-delay electronic relay can be regulated, so the time of striking also can be regulated.
Resistance R
1R
21, capacitor C
1C
3, diode D
1D
6, triode G
1G
3Form the closed loop automatic control circuit.
Work down at one of saturable reactor and closed loop automatic control circuit, make the generator characteristic of energy-conservation omnicharacteristic electric welding machine become vertical steep drop characteristic (being constant-current characteristics) so no matter at little electric current section, still in big electric current section welding, electric arc is all very stable.
The starting striking current value of energy-conservation omnicharacteristic welding machine also is adjustable, and the big I of starting striking electric current is by rheostat R
10Regulate.
From top embodiment as seen, the major loop of energy-conservation omnicharacteristic welding machine is very simple, and control circuit also is the conventional electrical element, and therefore enforcement of the present invention is to be relatively easy to.
Claims (4)
1, a kind of energy-conservation omnicharacteristic electric welding machine is characterized in that by electromotive force coil BC leakage field loop A B, bidirectional triode thyristor CP
1, CP
2, saturable reactor BH, signal transformer CT, closed loop electronic control circuit and time-delay electronic relay form.
2, by the energy-conservation omnicharacteristic electric welding machine of claim 1, it is characterized in that the impedance voltage drop of electromotive force coil BC is very little, about the about 30～40V of output voltage.
3, by the energy-conservation omnicharacteristic electric welding machine of claim 1, it is characterized in that the impedance voltage drop of leakage field loop A B is very big, its sectional area of wire is programmable very little.
4, by the energy-conservation omnicharacteristic electric welding machine of claim 1, it is characterized in that bidirectional triode thyristor CP
1And CP
2Can replace with mechanical commutation electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108066 CN1021416C (en) | 1988-11-28 | 1988-11-28 | A.c. hand operated electric arc welding machine for thin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108066 CN1021416C (en) | 1988-11-28 | 1988-11-28 | A.c. hand operated electric arc welding machine for thin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042856A true CN1042856A (en) | 1990-06-13 |
| CN1021416C CN1021416C (en) | 1993-06-30 |
Family
ID=4834903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108066 Expired - Fee Related CN1021416C (en) | 1988-11-28 | 1988-11-28 | A.c. hand operated electric arc welding machine for thin sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021416C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110382152A (en) * | 2017-03-09 | 2019-10-25 | 伊利诺斯工具制品有限公司 | For measuring the solder type electric supply and welding equipment of welding circuit resistance via the communication on welding circuit |
| US11660695B2 (en) | 2017-03-09 | 2023-05-30 | Illinois Tool Works Inc. | Welding power supplies, wire feeders, and systems to measure a weld cable voltage drop |
-
1988
- 1988-11-28 CN CN 88108066 patent/CN1021416C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110382152A (en) * | 2017-03-09 | 2019-10-25 | 伊利诺斯工具制品有限公司 | For measuring the solder type electric supply and welding equipment of welding circuit resistance via the communication on welding circuit |
| US11027355B2 (en) | 2017-03-09 | 2021-06-08 | Illinois Tool Works | Welding power supplies, wire feeders, and systems to measure a weld circuit resistance via communications over the weld circuit |
| CN110382152B (en) * | 2017-03-09 | 2021-11-26 | 伊利诺斯工具制品有限公司 | Welding-type power supply and welding device for measuring welding circuit resistance via communication over the welding circuit |
| US11660695B2 (en) | 2017-03-09 | 2023-05-30 | Illinois Tool Works Inc. | Welding power supplies, wire feeders, and systems to measure a weld cable voltage drop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1021416C (en) | 1993-06-30 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |