CN206241443U - Arc length control device - Google Patents
Arc length control device Download PDFInfo
- Publication number
- CN206241443U CN206241443U CN201621266822.5U CN201621266822U CN206241443U CN 206241443 U CN206241443 U CN 206241443U CN 201621266822 U CN201621266822 U CN 201621266822U CN 206241443 U CN206241443 U CN 206241443U
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- China
- Prior art keywords
- arc voltage
- arc
- comparison means
- control device
- voltage comparison
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Abstract
The utility model is related to a kind of arc length control device, including arc voltage harvester, arc voltage comparison means and drive device, and arc voltage harvester connection arc voltage comparison means, arc voltage comparison means connects drive device, and drive device is used to be connected with welding gun.Arc voltage harvester receives arc voltage signal, output arc voltage value to arc voltage comparison means, arc voltage comparison means output drive signal to drive device；Drive device control welding gun movement, to change the weld arc length of welding gun, by arc length stabilization in a suitable scope, realizes to weld arc length real-time control.
Description
Technical field
The utility model is related to welding control technology field, more particularly to a kind of arc length control device.
Background technology
With the development of modern industry, requirement more and more higher of the enterprise to solder technology, welding efficiency and welding quality is real
Existing Automation of Welding has turned into common recognition.
Because welded part surface is uneven in many occasions, in order to ensure welding quality, it is necessary to welding gun tungsten electrode
Position can change with the change of workpiece surface height in time, that is, ensure the distance on welding gun tungsten electrode and welding workpiece surface
(abbreviation spacing) is constant, so that electric arc arc length (abbreviation arc length) keeps constant.If arc length is too short, tungsten electrode is easily set to be stained with workpiece,
Cause short circuit.If small when big during arc length, weld seam can be made uneven, unsightly, and weld strength declines.Therefore in argon arc welding
Need to be controlled weld arc length in welding process, stabilize it very necessary in the length of a determination.
Utility model content
Based on this, it is necessary to regarding to the issue above, there is provided a kind of welding arc control being capable of achieving to weld arc length real-time control
Device.
A kind of arc length control device, including arc voltage harvester, arc voltage comparison means and drive device, the arc voltage collection
Device connects the arc voltage comparison means, and the arc voltage comparison means connects the drive device, the drive device be used for
Welding gun is connected,
The arc voltage harvester receives arc voltage signal, output arc voltage value to the arc voltage comparison means, the arc voltage ratio
Compared with device output drive signal to the drive device；The drive device controls the welding gun movement.
Above-mentioned arc length control device, arc voltage harvester carries out analog-to-digital conversion to the arc voltage signal for receiving, and obtains arc voltage value
And send to arc voltage comparison means.Arc voltage comparison means according to the relation output drive signal of arc voltage value and default value scope extremely
Drive device, drives welding gun to move by drive device, to change the weld arc length of welding gun, arc length stabilization is suitable at one
In the range of, realize to weld arc length real-time control.
Brief description of the drawings
Fig. 1 is the structure chart of arc length control device in an embodiment；
Fig. 2 is the schematic diagram of arc voltage harvester in an embodiment；
Fig. 3 is the schematic diagram of arc voltage comparison means in an embodiment；
Fig. 4 is the schematic diagram of drive device in an embodiment；
Fig. 5 is the schematic diagram of liquid crystal display device in an embodiment；
Fig. 6 is the schematic diagram of serial communication device in an embodiment.
Specific embodiment
In one embodiment, a kind of arc length control device, it is adaptable to the welding arc control of argon arc welding machine.As shown in figure 1, should
Arc length control device includes arc voltage harvester 110, arc voltage comparison means 120 and drive device 130, arc voltage harvester 110
Connection arc voltage comparison means 120, the connection drive device 130 of arc voltage comparison means 120, drive device 130 is used to be connected with welding gun.
Welding gun can be specifically argon-arc welding gun or other kinds of welding gun.Arc voltage harvester 110 receives arc voltage signal, exports arc voltage value
To arc voltage comparison means 120, the output drive signal of arc voltage comparison means 120 to drive device 130；The control weldering of drive device 130
Rifle is moved.In the present embodiment, arc voltage harvester 110 and arc voltage comparison means 120 are powered using 5V dc sources, specifically can be by
Switching Power Supply is provided, and drive device 130 uses 24V AC-powereds, specifically can directly be provided by transformer.
In certain spacing range, arc voltage is substantially linear with arc length.When welding gun tungsten electrode and face of weld spacing
Increase, when arc length increases, measures arc voltage and also increases, and molten wide during welding increases, and fusion penetration is slightly reduced.Arc voltage harvester
The arc voltage signal of 110 pairs of receptions carries out analog-to-digital conversion, obtains arc voltage value and sends to arc voltage comparison means 120.Arc voltage compares dress
120 are put according to the relation output drive signal of arc voltage value and default value scope to drive device 130, by drive device 130
Welding gun movement is driven, to change the weld arc length of welding gun, by arc length stabilization in a suitable scope.
The specific value of default value scope is not unique, in the present embodiment, setting arc voltage is made with default error sum
It is the higher limit of default value scope, the difference of arc voltage and default error as the lower limit of default value scope will be set.According to
The arc voltage value for collecting and the relation of default value scope, change the direction that drive device 130 drives welding gun movement, so as to adjust
The position of welding gun, it is ensured that the arc voltage value of collection is within the scope of default value.So that default error is 0.03V as an example, then according to reality
When arc voltage control drive device 130 relative to the size of the standard arc voltage of setting, it is ensured that the difference of real-time arc voltage and setting arc voltage
Value is no more than ± 0.03V.It is appreciated that in other embodiments, it can be directly setting higher limit and lower limit are pre- to determine
If number range.
Specifically, if arc voltage value is within the scope of default value, drive device 130 does not drive welding gun to move, if arc voltage
Less than the lower limit of default value scope, then drive device 130 drives welding gun to move up to value, if arc voltage value is more than default value
The higher limit of scope, then drive device 130 drive welding gun move down, to change the distance of welding gun and welding workpiece, realize arc
Control long.
It should be noted that arc voltage comparison means 120 is believed according to the relation output driving of arc voltage value and default value scope
Number to drive device 130, welding gun is driven to move by drive device 130, can be using product ripe on the market at present, and profit
Its data handling procedure is realized with the common programs carried on these matured products, it may not be necessary to depend on new program
Realize.
In one embodiment, as shown in Fig. 2 arc voltage harvester 110 include analog-digital converter U3, first resistor R5 and
Voltage-stabiliser tube D1.Analog-digital converter U3 can specifically use PCF8591 chips.
Analog-digital converter U3 connections arc voltage comparison means 120, first resistor R5 one end connection power access end VCC is another
End connects the negative electrode and analog-digital converter U3 of voltage-stabiliser tube D1, the plus earth of voltage-stabiliser tube D1, and power access end VCC is 5V direct currents
Input.Specifically, port SCL and port SDA connection the arc voltage comparison means 120 of analog-digital converter U3, port AGND, port
EXT, port A0, port A1, port A2 and port VSS ground connection.Analog-digital converter U3 port VREF connection first resistor R5 and
The common port of voltage-stabiliser tube D1, power access end VCC, port AIN0 are for receiving arc voltage signal for port VDD connections.For ease of reason
Solution, in the present embodiment, the slide plate of the port AIN0 connection slide rheostats R2 of analog-digital converter U3, slide rheostat R2 one end connects
Meet power access end VCC, other end ground connection.Change the resistance of slide rheostat R2 by the slide plate for adjusting slide rheostat R2,
The input of arc voltage signal is simulated, the input voltage of port AIN0 is changed, analog-to-digital conversion is carried out as analog-digital converter U3,
The arc voltage caused because arc length changes is simulated to change.
The function of PCF8591 chips gradually compares modulus and turns including multiplexing simulation input, built-in tracking holding, 8
Change function and 8 analog conversion functions.Its maximum slew rate depends on the flank speed of I2C buses.The simulation of the tunnels of Ta tetra- is defeated
Enter to be programmed for single ended input or Differential Input.Clock line SCL is only depended in the message transmitting procedure of arc voltage comparison means 120
With data wire SDA it is achieved that the control of which of arc voltage comparison means 120 is by clock bus SCL and data/address bus SDA
Carry out, and the result of AD conversion is also to be carried out by data/address bus SCL and data/address bus SDA.
Real-time arc voltage is gathered using the A/D analog-digital conversion functions of PCF8591 chips.After obtaining real-time arc voltage value, just
Can judge arc length whether within the required range.Specifically, made by the control clock bus of arc voltage comparison means 120 and data/address bus
PCF8591 chips gather Real-time arc voltage, take port AIN0 as A/D conversion inputs.When data manipulation is carried out, first
It is that main controller (arc voltage comparison means 120) sends initial signal, then sends reading addressing byte, is controlled device (PCF8591 chips)
After responding, main controller reads first data byte from controlled device, and main controller sends response, and main controller reads from controlled device
Second data byte, main controller sends response ... until main controller reads nth data byte, main controller from controlled device
Non- answer signal is sent, last main controller sends stop signal.By result serial transmission to arc voltage comparison means 120 after, then pass through
Certain treatment is crossed, Real-time arc magnitude of voltage is calculated.
In one embodiment, as shown in figure 3, arc voltage comparison means 120 includes controller U2, reset circuit 122 and crystalline substance
Shake circuit 124, and controller U2 connects arc voltage harvester 110 and drive device 130, and reset circuit 122 and crystal oscillating circuit 124 connect
Meet controller U2.In the present embodiment, controller U2 is STC89C52 single-chip microcomputers.
Port P1.2 and port P1.3 connection the arc voltage harvester 110 of controller U2, specific connection analog-digital converter U3
Port SCL and port SDA.The port P0.0 of controller U2 to port P0.2 connects drive device 130, specifically can be by interface
R3 is connected with drive device 130.
In the present embodiment, interface R3 is 8X1k interfaces.STC89C52 single-chip microcomputers are controlled by clock line SCL and data wire SDA
PCF8591 chips processed gather Real-time arc voltage, at the same by Real-time Collection to arc voltage value be compared with arc voltage is set, according to
Comparative result control drive device 130 adjusts the position of welding gun.
Specifically, in one embodiment, reset circuit 122 includes reset switch BOTTUN, the first electric capacity C1 and second
Resistance R4, the first electric capacity C1 and second resistance R4 connect and common port connection controller U2, the port of specific connection controller U2
RST, first electric capacity C1 other ends connection power access end VCC, second resistance R4 other ends ground connection, reset switch BOTTUN and the
One electric capacity C1 is in parallel.When program sideslip occurs in controller U2, controller U2 can be resetted by reset circuit 122, carried
The operational reliability of arc length control device high.
In one embodiment, crystal oscillating circuit 124 includes crystal resonator Y1, the second electric capacity C6 and the 3rd electric capacity C7.Crystal resonator
Y1 connects controller U2, and specifically, the port 1 of crystal resonator Y1 connects the port x TAL1 of controller U2, the port 2 of crystal resonator Y1
The port x TAL2 of connection controller U2.The equal one end connection crystal resonator Y1 of second electric capacity C6 and the 3rd electric capacity C7, other end ground connection.
Specifically, the port 2 of the second electric capacity C6 connection crystal resonators Y1, the port 1 of the 3rd electric capacity C7 connection crystal resonators Y1.
In one embodiment, as shown in figure 4, drive device 130 includes motor driver P1, electric motor protecting plate P2 and electricity
Machine P3, motor driver P1 connection arc voltage comparison means 120, electric motor protecting plate P2 connection motor driver P1 and motor P3, electricity
Machine P3 is used to connect welding gun.Motor driver P1 can be specifically stepper motor driver, and motor P3 is stepper motor.This implementation
In example, motor driver P1 is the two-phase subdivision type composite stepper motor driver of DX-DM242A models, and input signal is used
Phototube Coupling, with short circuit, misphase, overcurrent protection function, there is provided half electric current lock function of energy-conservation.
The port AC1 and port AC2 of motor driver P1 access 24V alternating currents, port CP+, port DIR+ and port RST
+ connection power access end VCC, port CP-, the port DIR- and port RST- of motor driver P1 connect arc voltage and compare dress respectively
Put port P0.0, port P0.1 and the port P0.2 of controller U2 in 120.The port A+ of motor driver P1, port A-, port
B+ and port B- is connected by electric motor protecting plate P2 with motor P3.
Motor driver P1 is used to motor P3 rotatings, and then drives welding gun to move up or down, to realize
Welding arc control, by arc length stabilization in a suitable scope.Specifically, when the arc voltage value and the difference for setting arc voltage of Real-time Collection
When value is no more than ± 0.03V, motor P3 stallings；When arc voltage value is less than setting arc voltage -0.03V, controlled motor P3 turns clockwise
It is dynamic, drive welding gun to move up；When arc voltage value is more than setting arc voltage+0.03V, controlled motor P3 is rotated counterclockwise, and drives weldering
Rifle is moved down.
In one embodiment, arc length control device also includes the display device of connection arc voltage comparison means 120.Arc voltage ratio
The arc voltage value of Real-time Collection is sent to display device compared with device 120 is shown, so that tester observes.The present embodiment
In, display device is liquid crystal display device.
Further, in one embodiment, as shown in figure 5, liquid crystal display device includes display P and slide rheostat
R1, display P connect slide rheostat R1 and arc voltage comparison means 120, display P concretely LCD12864 chips.
Specifically, the slide plate of the port V0 connection slide rheostats R1 of display P, slide rheostat R1 one end connection power supply
Incoming end VCC, the port Vout of other end connection display P, port GND and port the LEDK ground connection of display P, port VCC
With port LEDA connection power access ends VCC.The port RST of display P, port PSB, port E, port RW and port RS difference
The port P0.3 to port P0.7 of controller U2 in connection arc voltage comparison means 120.The port DB0 of display P to port DB7 points
Not Lian Jie controller U2 port P2.0 to port P2.7.
In one embodiment, arc length control device also includes the serial communication device of connection arc voltage comparison means 120.Can
Communicated by serial communication device, be easy to data to download backup；Can also be by serial communication device to arc voltage comparison means
120 carry out debugging detection.
Specifically, as shown in fig. 6, in one embodiment, serial communication device includes electrical level transferring chip U1 and serial ports
Joint J2, electrical level transferring chip U1 connection arc voltage comparison means 120 and serial ports joint J2.Electrical level transferring chip U1 can be used
MAX232 chips.
Additionally, serial communication device may also include the 4th electric capacity C2, the 5th electric capacity C3, the 6th electric capacity C4 and the 7th electric capacity
The port VCC connection power access ends of C5, electrical level transferring chip U1, port GND ground connection.The port T1IN of electrical level transferring chip U1
With the port P3.1 and port P3.0 that port R1OUT connects controller U2 in arc voltage comparison means 120 respectively, electrical level transferring chip
Port T1OUT and port R1IN connection serial ports the joint J2 of U1.4th electric capacity C2 one end connects the port of electrical level transferring chip U1
C1+, the port C1- of other end connection electrical level transferring chip U1.5th electric capacity C3 one end connects the port V of electrical level transferring chip U1
+, other end connection power access end VCC.6th electric capacity C4 one end connects the port C2+ of electrical level transferring chip U1, and the other end connects
Meet the port C2- of electrical level transferring chip U1.7th electric capacity C5 one end connects the port V- of electrical level transferring chip U1, another termination
Ground.
With the voltage analog arc voltage on slide rheostat R2, there is its both end voltage in the resistance of regulation slide rheostat R2
Change, the change of arc voltage is simulated with this, while being also the change for simulating arc length.Slide rheostat R2 both end voltages scope is 0
~5V, PCF8591 chip are 8 CMOS samplers, and its resolution ratio is 5V/255=0.019V.In testing, arc voltage is set
It is 3.50V, test result is as follows：
(1) when the magnitude of voltage on slide rheostat R2 is between 3.47V~3.53V, controller U2 thinks real-time arc
Pressure is of substantially equal with setting arc voltage 3.50V, and now stepper motor stops operating.
(2) when the magnitude of voltage on slide rheostat R2 is less than 3.47V, i.e., real-time arc voltage is less than setting arc voltage, this time step
Stepper motor is rotated clockwise.In the process, as long as the voltage on slide rheostat R2 is less than 3.47V, stepper motor can be always
Rotate clockwise, until the voltage on slide rheostat R2 is not less than 3.47V.
(3) when the magnitude of voltage on slide rheostat R2 is more than 3.53V, i.e., real-time arc voltage is more than setting arc voltage, this time step
Stepper motor is rotated counterclockwise.In the process, as long as the voltage on slide rheostat R2 is more than 3.53V, stepper motor can be always
Rotate counterclockwise, until the voltage on slide rheostat R2 is not more than 3.53V.
Above-mentioned arc length control device, the arc voltage signal of 110 pairs of receptions of arc voltage harvester carries out analog-to-digital conversion, obtains arc voltage
It is worth and sends to arc voltage comparison means 120.Arc voltage comparison means 120 is exported according to the relation of arc voltage value and default value scope and driven
Dynamic signal drives welding gun to move to drive device 130 by drive device 130, to change the weld arc length of welding gun, arc length is steady
It is scheduled in a suitable scope, realizes to weld arc length real-time control.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of arc length control device, it is characterised in that including arc voltage harvester, arc voltage comparison means and drive device, institute
State arc voltage harvester and connect the arc voltage comparison means, the arc voltage comparison means connects the drive device, the driving
Device is used to be connected with welding gun,
The arc voltage harvester receives arc voltage signal, and to the arc voltage comparison means, the arc voltage compares dress to output arc voltage value
Put output drive signal to the drive device；The drive device controls the welding gun movement.
2. arc length control device according to claim 1, it is characterised in that the arc voltage harvester includes analog-to-digital conversion
Device, first resistor and voltage-stabiliser tube,
The analog-digital converter connects the arc voltage comparison means, and described first resistor one end connects power access end, the other end
Connect the negative electrode and the analog-digital converter of the voltage-stabiliser tube, the plus earth of the voltage-stabiliser tube.
3. arc length control device according to claim 1, it is characterised in that the arc voltage comparison means include controller,
Reset circuit and crystal oscillating circuit, the controller connect the arc voltage harvester and the drive device, the reset circuit
The controller is connected with the crystal oscillating circuit.
4. arc length control device according to claim 3, it is characterised in that the reset circuit includes reset switch, the
One electric capacity and second resistance, first electric capacity and second resistance series connection and common port connect the controller, and described the
The one electric capacity other end connects power access end, the second resistance other end ground connection, the reset switch and first electric capacity
It is in parallel.
5. arc length control device according to claim 3, it is characterised in that the crystal oscillating circuit includes crystal resonator, second
Electric capacity and the 3rd electric capacity, the crystal resonator connect the controller, second electric capacity and the equal one end connection of the 3rd electric capacity
The crystal resonator, other end ground connection.
6. arc length control device according to claim 1, it is characterised in that the drive device include motor driver,
Electric motor protecting plate and motor, the motor driver connect the arc voltage comparison means, and the electric motor protecting plate connects the electricity
Machine driver and the motor, the motor are used to connect the welding gun.
7. arc length control device according to claim 1, it is characterised in that also including connecting the arc voltage comparison means
Display device.
8. arc length control device according to claim 7, it is characterised in that the display device is liquid crystal display device.
9. arc length control device according to claim 1, it is characterised in that also including connecting the arc voltage comparison means
Serial communication device.
10. arc length control device according to claim 9, it is characterised in that the serial communication device includes that level turns
Chip and serial ports joint are changed, the electrical level transferring chip connects the arc voltage comparison means and the serial ports joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266822.5U CN206241443U (en) | 2016-11-24 | 2016-11-24 | Arc length control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266822.5U CN206241443U (en) | 2016-11-24 | 2016-11-24 | Arc length control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206241443U true CN206241443U (en) | 2017-06-13 |
Family
ID=59001936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621266822.5U Expired - Fee Related CN206241443U (en) | 2016-11-24 | 2016-11-24 | Arc length control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206241443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250890A (en) * | 2020-02-17 | 2020-06-09 | 南京未来网络产业创新有限公司 | Butt joint weld quality online monitoring method and device |
-
2016
- 2016-11-24 CN CN201621266822.5U patent/CN206241443U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250890A (en) * | 2020-02-17 | 2020-06-09 | 南京未来网络产业创新有限公司 | Butt joint weld quality online monitoring method and device |
| CN111250890B (en) * | 2020-02-17 | 2021-11-23 | 南京未来网络产业创新有限公司 | Butt joint weld quality online monitoring method and device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170613 Termination date: 20171124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |