CN2176211Y - Photoelectric controller for tripolar electron welder - Google Patents
Photoelectric controller for tripolar electron welder Download PDFInfo
- Publication number
- CN2176211Y CN2176211Y CN 93239518 CN93239518U CN2176211Y CN 2176211 Y CN2176211 Y CN 2176211Y CN 93239518 CN93239518 CN 93239518 CN 93239518 U CN93239518 U CN 93239518U CN 2176211 Y CN2176211 Y CN 2176211Y
- Authority
- CN
- China
- Prior art keywords
- electron gun
- voltage
- controller
- electron
- optical signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Welding Or Cutting Using Electron Beams (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
The utility model relates to a photoelectric controller of a tripolar electron welder, which is composed of an optical signal generator, a high pressure photoelectric coupler, a grid bias pressure amplifier, a protection circuit, etc. The optical signal generator sends continuous or pulsed infrared light signals. After the signals are delivered to the grid bias pressure amplifier by the high pressure photoelectric coupler and are amplified, the signals can be used as the grid bias pressure of the tripolar electron welder to control electron beam current. The beam current photoelectric controller has the characteristic of fast control towards the electron beam current. The pulse or staircase waveform beam current which is increased according to different slopes and attenuated constantly can be obtained. The electron beam welding of continuous work pieces, intermittent work pieces, pulse work pieces and variable cross-section work pieces can be realized conveniently.
Description
The utility model belongs to a kind of controller that is used to control electron beam current in the electron beam welding equipment.
In electron beam welding equipment (as shown in Figure 1), the effect of electron gun EGW is the emission electronics, makes its acceleration and focusing become the electron beam current i of high-energy-density
BThis electronic beam current i
BLeave electron gun EGW and enter bombardment welded piece W behind the VB of welding job chamber, can make the metal molten of its seam crossing and realize solder bond.Electron gun EGW among Fig. 1 is exactly the structural representation of three-pole welding electron gun, three electrodes such as its negative electrode C, anode A and grid G have been formed the electron emission part of electron gun, and solenoid M then makes electron stream can form focus by coalescence on workpiece W under the effect of electromagnetic force.Right-hand component is high voltage source HS among Fig. 1, and it provides operate as normal necessary voltage by three core high-voltage cable HC to each electrode of electron gun.Wherein, E
CBe the negative electrode heating power supply, it is generally tungsten filament or tungsten band to electron gun direct-heated cathode C() provide heating current to make it produce thermionic emission; E
ABe accelerating power source, the high direct voltage of its output (being generally 60KV or 150KV) puts between gun cathode C and the anode A (negative electrode C connects negative, anode A just connect), makes negative electrode C electrons emitted stream quicken and obtain high energy by means of the high voltage electric field that forms between the C-A; E
CThen be grid bias supply, it is output as a direct current voltage U
G(claim " gate bias ") also is applied between the negative electrode C and grid G of electron gun (negative electrode C is just connecing, grid G connect negative).Because gate bias U
GEffect, make to produce an electric field that suppresses the cathode electronics emission between the negative electrode C of electron gun and the grid G, when making U by some way
GBe adjusted to maximum from zero and (depend on accelerating potential E
ASize, be generally-1KV or-2KV) time, the variation that the electric field between the C-G then grows from weak to strong, thus make negative electrode C electrons emitted line i
BCorrespondingly be reduced to for zero (i.e. " line ends ") by maximum, Here it is uses gate bias U
GCarry out the operation principle of line control.Accelerating potential one timing, the triode gun negative electrode C electrons emitted line i of being shown in Figure 2
BWith gate bias U
GRelation curve i
B=f(U
G).In electron beam welding equipment, utilize gate bias U just
GVariation regulate electronic beam current i
BSize, thereby the beam energy of control action on welded piece finally reaches purposes such as control weld seam depth of fusion.
In existing electron beam welding equipment, line controller (grid bias supply E
G) theory structure as shown in Figure 3.It (comprises resistance R by transformer T, rectifier AV, wave filter
1, R
2And capacitor C) forms.This line controller E
GBe installed among the high voltage source HS of Fig. 1 its input X
1, X
2(being the former limit of transformer T) is by AC voltage adjusting power supply e
gPower supply, its output H
1, H
2The gate bias U that provides
GCore P through high-tension cable HC
1, P
2Be applied between the negative electrode C and grid G of electron gun.Regulate transformer T former limit AC-input voltage e
g, can change the gate bias U that pays limit output
GSize, regulate electron beam current i thereby reach
BPurpose.Here, the effect of transformer T is: (1) is with former limit alternating voltage e
gBoost after rectification, filtering and form the needed gate bias U of electron gun work
GWhat (2) will be in the direct current high potential pays limit winding W
1With the former limit winding W that is in electronegative potential
OAnd power supply e
gFrom electric isolation.Therefore, the governing loop of gate bias is built up in the former limit (low-pressure side) of transformer T in this circuit.Because e
g) be generally power frequency (50 or 60HZ), and R, C are bigger in the wave filter, make that the inclined to one side power supply time constant of whole grid is big, dynamic response is poor, more can not produce the gate bias and the pulsed electron beam electronic current of impulse waveform.
The purpose of the present utility model is in order to reduce the gate bias time constant of above-mentioned line controller, improve dynamic response, and can produce the gate bias and the pulsed electron beam of impulse waveform, so that the beam energy of control action on welded piece, realize sequential welding, technology such as weldering and the welding of variable cross-section workpiece indirectly.
To achieve these goals, the utility model is to the line controller of three-pole welding electron gun, a kind of new circuit structure is provided, and the line controller of making of sort circuit is called " three-pole welding electron gun line light-controller ", is called for short " line light-controller ".
The schematic circuit of this line light-controller as shown in Figure 4, it comprises optical signal generator 1, high pressure photoelectrical coupler 2, gate bias amplifier 3, holding circuit 4 and insulating power supply 5.LG output current in the optical signal generator 1 makes light emitting diode V
8Send infrared signal, the fibre-optic bundle CL in high pressure photoelectrical coupler 2 is to phototriode V
2, V
2Convert optical signal to input that the signal of telecommunication enters gate bias amplifier 3, and through transistor V
3Meet electron tube V after the amplification
1Control grid g
1, by electron tube V
1Load resistance R
7Output voltage U
G, U
GBy H
1, H
2Two ends are by the core P of high-tension cable HC
1, P
2The grid G, the negative electrode C(that are applied to electron gun EGW see Fig. 5), as the gate bias of electron gun EGW, the transformer T in the insulating power supply 5 pays limit winding W
1, W
2, W
3After rectification-filtering-voltage stabilizing, give electron tube V respectively
1Plate voltage E is provided
a, screen grid voltage E
G2, control gate pole tension E
G1, winding W
4Filament voltage E is provided
f
Description of drawings:
The electron beam welding equipment schematic diagram of Fig. 1-employing triode gun
Fig. 2-electronic beam current i
BGraph of relation with gate bias Ug
The circuit structure diagram of Fig. 3-prior art source of electron gun grid bias
The circuit structure diagram of Fig. 4-the utility model " three-pole welding electron gun line light-controller "
Fig. 5-employing electron beam welding equipment of the present utility model schematic diagram
In conjunction with the accompanying drawings 4, Fig. 5 forms the utility model each several part and effect is elaborated.
Its input of high pressure photoelectrical coupler 2--is the light emitting diode V that is operated in infrared band
8, output is phototriode V
2, the fibre-optic bundle CL with the tape insulation sheath between the two does optically-coupled.The effective diameter of CL is that 2mm is left and right, and its length should be able to guarantee to bear reliably electron gun accelerating power source high direct voltage E
A(60KV or 150KV) and not breakdown.
Holding circuit 4--is by current-limiting resistance R
5, R
6And diode V
4-7Deng composition.When high-voltage discharge that the anode A of electron gun meets accident to grid G, R
5And V
4-7For discharge current provides a path, thus the not reason high-voltage breakdown and damaging of other parts of having protected the line controller.R
6Effect then be to prevent to make electron tube V because of gun cathode C and grid G accidental short circuit
1Overload.
It provides the voltage of regulation insulating power supply 5--for the work of line controller each several part circuit.Wherein the effect of transformer T is to be in pair each winding (W of limit of the high potential that equates with gun cathode C
1-W
4) be in the former limit winding W of electronegative potential
OOn electric, isolate, simultaneously by paying limit winding (W
1-W
3) voltage after rectification-filtering-voltage stabilizing respectively to electron tube V
1Plate voltage E is provided
a, screen grid voltage E
G2With control gate pole tension E
G1, winding W
4Then to electron tube V
1Filament provide and exchange heating voltage E
fThe former limit winding W of transformer T
OPower supply can directly take from the power frequency civil power of single-phase 220V and not need pressure regulation.
The each several part of above-mentioned three-pole welding electron gun line light-controller except that optical signal generator 1, all combination install in aggregates, it and electron gun EGW and high voltage source its remove partly be connected see shown in Figure 5.Because the operating voltage of high voltage source is up to 60KV or 150KV, so its inside is full of insulating oil, and whole line light-controller removes the light emitting diode V of photoelectrical coupler 2 inputs
8Outside optical signal generator 1, all the other each several parts also all place insulating oil.Line light-controller output H
1, H
2The electron gun gate bias U that provides
GCore P through high-tension cable HC
1, P
2Be applied to (see figure 5) between the negative electrode C of electron gun and the grid G.
As seen by above-mentioned, when electron beam welding equipment was devoted oneself to work, optical signal generator 1 output current among Fig. 4 made light emitting diode send infrared signal, and this signal is transferred to the phototriode V of gate bias amplifier 3 input stages through photoelectrical coupler 2
2, V
2Convert optical signal to the signal of telecommunication and after amplifying by its output stage electron tube V
1Load resistance form the gate bias U of electron gun
G(see figure 5), U
GCore P through high-tension cable
1, P
2Put between the negative electrode C of electron gun and the grid G and electron beam current i
BStart to control to make and use.Therefore, when regulating the output of optical signal generator 1, the voltage U of line light-controller output
GChange thereupon, thereby make electron gun electrons emitted beam electronic current i
BAccording to i shown in Figure 2
B=f(U
G) concern and determine.Obviously, when optical signal generator 1 output pulse or other waveform signals, electron gun electrons emitted line i
BAlso be pulse or respective waveforms.
The utility model than the superior part of existing controller mainly is: do not have the element of inductance, electric capacity and so in the transmission channel of (1) line control signal, thereby have the characteristics to line " fast " control. It not only can be used for the control of constant line, and can obtain stairstepping or pulsed beam current, thereby can realize easily sequential welding, the indirect process such as weldering and variable section workpiece welding; (2) the line control signal has adopted infrared light from electronegative potential to the transmission of electron gun high-potential electrode, and makes the high pressure photoelectrical coupler with the optical fiber of reliable insulation, thereby has improved antijamming capability and electrical safety performance.
The utility model is applicable to that the electron beam welding equipment that adopts triode gun does the control of electron beam current, also is applicable to the line control of triode gun in other electron beam equipment on principle. The utility model is the electron beam current controller that a kind of circuit structure is reasonable, control method is advanced, safe and reliable, economic and practical.
Claims (3)
1, three-pole welding electron gun line light-controller, an exportable voltage U
GGate bias as three-pole welding electron gun; it is characterized in that this line light-controller is made up of optical signal generator (1), high pressure photoelectrical coupler (2), gate bias amplifier (3), holding circuit (4) and insulating power supply (5), the output current of optical signal generator (1) makes light emitting diode V
8Send infrared signal, the fibre-optic bundle CL in high pressure photoelectrical coupler (2) is delivered to phototriode V
2, V
2Convert optical signal to input that the signal of telecommunication enters gate bias amplifier (3), and through transistor V
3Meet electron tube V after the amplification
1Control grid g
1, by electron tube V
1Load resistance R
7Output voltage U
G, U
GBy H
1, H
2Two ends are by the core P of high-tension cable HC
1, P
2Be applied to grid G, the negative electrode C of electron gun, as the gate bias of electron gun, the transformer T in the insulating power supply (5) pays limit winding W
1, W
2, W
3After rectification-filtering-voltage stabilizing, give electron tube V respectively
1Plate voltage E is provided
a, screen grid voltage E
G2, control gate pole tension E
G1, winding W
4Filament voltage E is provided
f
2, according to claim 1 described electron gun line light-controller, it is characterized in that the fibre-optic bundle CL in the high pressure photoelectrical coupler (2) is the fibre-optic bundle that adopts the tape insulation sheath, the length of CL should guarantee to bear electron gun accelerating power source high direct voltage E
A(60KV or 150V) is not breakdown.
3, according to claim 1 described electron gun line light-controller, the each several part that it is characterized in that the line light-controller is except that optical signal generator (1), and all combination is installed in aggregates; Remove light emitting diode V
8And outside the optical signal generator (1), all the other each several parts all place insulating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93239518 CN2176211Y (en) | 1993-11-09 | 1993-11-09 | Photoelectric controller for tripolar electron welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93239518 CN2176211Y (en) | 1993-11-09 | 1993-11-09 | Photoelectric controller for tripolar electron welder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2176211Y true CN2176211Y (en) | 1994-09-07 |
Family
ID=33814032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93239518 Expired - Fee Related CN2176211Y (en) | 1993-11-09 | 1993-11-09 | Photoelectric controller for tripolar electron welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2176211Y (en) |
-
1993
- 1993-11-09 CN CN 93239518 patent/CN2176211Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |