CN202388117U - Resistance spot welding servo pressurizing system - Google Patents
Resistance spot welding servo pressurizing system Download PDFInfo
- Publication number
- CN202388117U CN202388117U CN2011202720403U CN201120272040U CN202388117U CN 202388117 U CN202388117 U CN 202388117U CN 2011202720403 U CN2011202720403 U CN 2011202720403U CN 201120272040 U CN201120272040 U CN 201120272040U CN 202388117 U CN202388117 U CN 202388117U
- Authority
- CN
- China
- Prior art keywords
- motion controller
- electrode
- spot welding
- encoder
- resistance spot
- 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
Links
Images
Landscapes
- Resistance Welding (AREA)
Abstract
The utility model discloses a resistance spot welding servo pressurizing system, which comprises a welder power supply, a man-machine interactive system, a control system and an actuating mechanism, wherein the control system comprises a motion controller for setting and feeding back parameters; the actuating mechanism comprises a driver, an encoder, a servo motor, a coupler, a connecting mechanism, an upper electrode, a lower electrode and a limit switch; and the driver is respectively connected with the motion controller, the encoder and the servo motor, the encoder is also connected with the motion controller, the coupler is connected with a compression connecting mechanism, and the limit switch for controlling upper and lower routes of the connecting mechanism is arranged on the motion controller. The resistance spot welding servo pressurizing system controls electrode displacement, speed and pressure through the servo pressuring, realizes matching with the welding parameters by using the signal output and feedback of the welding power supply and the motion controller, and has the advantages of small electrode tip impact force, high response speed of pressure change, and capability of accurately controlling electrode pressure, displacement and speed.
Description
Technical field
The utility model relates to the welder technical field, relates in particular to the servo compression system of a kind of resistance spot welding.
Background technology
Resistance spot welding is being brought into play the effect that becomes more and more important as a kind of important solder technology at industrial circles such as automobile, household electrical appliances, electronics, space flight.Resistance spot welding is the result of combined factors effects such as the electricity, heat, power of complicacy, and the factor that influences point quality is a lot, and wherein principal element has welding current, weld interval and welding pressure.In order to improve the control accuracy of welding current and weld interval; Comparatively general method is through adopting main circuit the inverter form of intermediate frequency to realize; And domestic the High Accuracy Control spot welding power supply that reverse frequency reaches 25kKHz has appearred, so reaching certain level aspect the precision control of welding current and weld interval.But the welding pressure aspect, people have often ignored the requirement of its precision control.
What resistance spot welding power supply was continued to use basically at present is traditional pressuring method; Like pneumatic pressurization, hydraulic pressurization and spring servo-actuated pressurization etc.; All there is its intrinsic defective in these modes; Can't guarantee the stability of electrode pressure and the accurate control of electrode displacement, in spot welding, particularly in the welding of miniature parts, be difficult to the welding quality that reaches satisfied.Therefore how accurately welding process to be exerted pressure, become the major issue that welding manufacturing enterprise faces.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming and defect of above-mentioned prior art; Provide a kind of resistance spot welding servo compression system; Have, pressure little and change the advantage that the fast and electrode pressure of response speed, displacement, speed can accurately be controlled, and the pressure that satisfies on the different process changes requirement the electrode tip impulsive force.
The utility model is realized through following technical proposals:
The servo compression system of a kind of resistance spot welding comprises welding machine electric power, man-machine interactive system, control system, executing agency, and said control system comprises the motion controller that is used to set with feedback parameter; Said executing agency comprises driver, encoder, servomotor, shaft coupling; Bindiny mechanism, top electrode, bottom electrode, limit switch; Said driver is connected with motion controller, encoder, servomotor respectively; Said encoder also is connected with motion controller, and said shaft coupling is connected with pressurization bindiny mechanism, and said motion controller is provided with and is used for the control connection mechanism limit switch of stroke up and down.
Said top electrode is connected with bindiny mechanism, and said bottom electrode is provided with a pedestal; Said man-machine interactive system comprises LCD display, the keyboard that is connected with welding machine electric power; Said bindiny mechanism is connected with shaft coupling through screw mandrel.
The utility model job step is following:
1) searching of mechanical origin carried out in start, and keeping each top electrode all is setting in motion from same position, guarantees that the position of top electrode can accurately be controlled.Before the servomotor running, welding power source system sends to motion controller to the displacement, speed, the pressure and other parameters that set by serial communication circuit, and the control servomotor is by spot welding control requirement running.
2) source of welding current is ready to just send enabling signal to motion controller; Motion controller receives and just begins to send the command pulse signal to pulse conversion circuit; The passages through which vital energy circulates red switch is changed circuit function and is produced the pulse signal drive motors running that driver needs, the displacement of control electrode and speed.Simultaneously, motion controller is to D/A change-over circuit output data, becomes the running torque of the torque limit signal control motor that driver needs through the D/A change-over circuit, thus the pressure of control electrode.
3) send signal to the source of welding current after top electrode puts in place, the source of welding current begins output current, and welding process begins.Welding finishes, and the source of welding current sends end signal to motion controller, sends the counter-rotating of pulse signal control motor after single-chip microcomputer receives, and when electrode is got back to original position, turn-offs all outputs, and motor stops the rotation, and waits for the signal that is next time sent by the source of welding current.
Telecommunication circuit can adopt the RS232 serial communication circuit, and control circuit and input circuit can adopt the switching mode light-coupled isolation.
Impulse circuit adopts AM26LS31 chip commonly used, and the torque control circuit adopts the DAC0832 chip to produce aanalogvoltage control, and pulse adopts the I/O mouth of AM26LS31 chip and DSP to accomplish jointly.
Motion controller is to adopt the dsPIC30F3011 chip of microchip company as core.Mainly be responsible for, accept predetermined value, accept operational order (enabling signal, alarm signal), gather signal and the control signal sent by certain sequential (like upper/lower electrode position, pulse signal, the number of notifying etc. clearly).DsPIC30F3011 has abundant peripheral module, comprises a large amount of I/O mouths.Have 5 16 bit timing devices, wherein can also be combined into 32 bit timing devices and use.DsPIC30F3011 has the high-speed a/d modular converter of 9 tunnels analogy inputs, 10 precision.6 road PWM output, three duty cycle register can be made as independence or compensation model, and PWM output can be rewritten, and Dead Time is able to programme.45 interrupt sources; 5 external interrupt, 7 programmable Interrupt priority have orthogonal coding interface (QEI) module; The QEI module can provide the simple interface with the increment optical-electricity encoder; Thereby can from motor or mechanical system, obtain to have the relative position information of symbol rate and rotor, the QEI module is accepted to be connected with index from the B of incremental encoder, and the count pulse that the base preservation adds up during with special-purpose 16.Can come measuring speed and positional information with X2 or X4 resolution ratio.
Compared with prior art the utility model is because AC servo motor can be realized the accurately control in real time to the output torque; But the size control determining electrode pressure through motor torque is exported in real time; Therefore; Through the servo pressurization of servomotor, obtain high-precision welding pressure, thereby further improve the welding quality of spot welding.
Description of drawings
Fig. 1 is the servo compression system structured flowchart of the utility model resistance spot welding.
The specific embodiment
Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail, but the embodiment of the utility model is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.
Embodiment
As shown in Figure 1, the servo compression system of the utility model resistance spot welding comprises welding machine electric power, man-machine interactive system, control system, executing agency, and said control system comprises the motion controller that is used to set with feedback parameter; Said executing agency comprises driver, encoder, servomotor, shaft coupling; Bindiny mechanism, top electrode, bottom electrode, limit switch; Said driver is connected with motion controller, encoder, servomotor respectively; Said encoder also is connected with motion controller, and said shaft coupling is connected with pressurization bindiny mechanism, and said motion controller is provided with and is used for the control connection mechanism limit switch of stroke up and down.
The bottom of this bottom electrode also is provided with a pedestal that is used to support; Said man-machine interactive system comprises LCD display, the keyboard that is connected with welding machine electric power.Said bindiny mechanism is connected with shaft coupling through screw mandrel.
This patent is main with the pressure between displacement, speed and the upper/lower electrode of controlling top electrode through servo pressurization through servomotor, utilizes the signal interaction of the source of welding current and motion controller to reach the coupling of welding parameter.Servomotor uses shaft coupling to drive the ball screw rotation; Realize the feeding (moving back and forth up and down) of electrode through bindiny mechanism by the feed screw nut; The rotation amount of servomotor and rotary speed have determined the amount of feeding and the feed speed of top electrode, and the torque of servomotor has determined the pressure between the upper/lower electrode.
Encoder, employing be the MSMD Series AC servo that has the incremental photoelectric encoder of MAT; Supporting with it driver MINASA4.Its upper/lower electrode rotating speed and feed speed, screw mandrel pitch relation are:
N refers to servomotor rotating speed (r/min) in the fast travel; Vm refers to table stroke speed (m/s); I refers to system's gearratio; P refers to screw mandrel pitch (mm).
In the practical implementation of this patent, described single-chip microcomputer adopts the dsPIC30F3011 chip of microchip company as core.
In the practical implementation of this patent, the periphery design pulse-generating circuit adopts AM26LS31 chip commonly used, and described pulse signal has position signalling to produce, and the command pulse signal that AC servo driver needs is that a pair of phase difference is 180 ° a signal.System adopts the PWM mode of dsPIC30F3011 to export pulse; Every road PWM can only export one road signal, for saving resource and realizing control more accurately, has designed a change-over circuit here; Adopt difference input Linear Driving circuit; Its differential driving chip is selected AM26LS31 for use, by the processing through chip AM26LS31 of the one-channel signal of single-chip microcomputer output, just can obtain a pair of phase difference and be 180 ° signal; Because pulse signal is a high-frequency signal, so when the design hardware interface circuit, need to consider the anti-interference of circuit.Adopt high speed optoelectronic isolating chip 6N137 to realize the electrical isolation of control section and drive part.
Described start initial point is searched the application controls system at first makes the feed screw nut fast towards the direction motion near Zero-point switch; After Zero-point switch is depressed by the feed screw nut; Motor braking is zero to speed, the counter motion of the control feed screw nut of control system then low velocity; When Zero-point switch is decontroled, when the control system detects first pulse of encoder at zero point, feed screw nut's stop motion, feed screw nut's position is actual zero point this moment.
In the practical implementation of this patent, the control signal circuit adopts the DAC0832 chip to produce aanalogvoltage control, and the control of servomotor torque adopts the mode of torque limit under the Position Control mode to control, and needs 2 road analog voltage signals, and one the tunnel for just, and one the tunnel for bearing.Adopt 28 DAC0832, produce generating positive and negative voltage respectively, be used to limit the torque of CCW and CW direction.Wherein, the torque of positive voltage restriction CCW direction, pact+3V/ nominal torque; The torque of negative voltage restriction CW direction, pact-3V/ nominal torque.
Man-machine interface shows the lattice type LCD display of selecting built-in T6963C controller for use, and this display has adopted the screen of 240 * 128 dot matrix; Keyboard adopts the nonencoded keyboard of 8 buttons.
This patent control overall system design; Adopt serial ports to communicate between source of welding current control system and the servo pressurizing control system; Searching of mechanical origin carried out in start, and keeping each electrode all is setting in motion from same position, guarantees that the position of electrode can accurately be controlled.Before motor rotation, the host computer welding power source system sends to kinetic control system to parameters such as the displacement that sets, speed, pressure parameters by serial communication circuit, and the control motor is by spot welding control requirement running.The source of welding current is ready to just send enabling signal to single-chip microcomputer; Single-chip microcomputer receives and just begins to send the command pulse signal to pulse conversion circuit; The passages through which vital energy circulates red switch is changed circuit function and is produced the pulse signal drive motors running that driver needs, the displacement of control electrode and speed.Simultaneously, single-chip microcomputer is to D/A change-over circuit output data, becomes the running torque of the torque limit signal control motor that driver needs through the D/A change-over circuit, thus the pressure of control electrode.Send signal to the source of welding current after electrode puts in place, the source of welding current begins output current, and welding process begins.Welding finishes, and the source of welding current sends end signal to single-chip microcomputer, sends the counter-rotating of pulse signal control motor after single-chip microcomputer receives, and when electrode is got back to original position, turn-offs all outputs, and motor stops the rotation, and waits for the signal that is next time sent by the source of welding current.
This patent has that electrode tip impulsive force to upper/lower electrode is little, pressure changes the advantage that pressure, displacement, speed between the fast and upper/lower electrode of response speed can accurately be controlled, and the pressure that satisfies on the different process changes requirement.
In this specification, this patent is described with reference to certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and the scope of this patent.Therefore, specification and accompanying drawing should be considered to illustrative and nonrestrictive.
Claims (4)
1. the servo compression system of resistance spot welding comprises welding machine electric power, man-machine interactive system, control system, executing agency, it is characterized in that, said control system comprises the motion controller that is used to set with feedback parameter; Said executing agency comprises driver, encoder, servomotor, shaft coupling; Bindiny mechanism, top electrode, bottom electrode, limit switch; Said driver is connected with motion controller, encoder, servomotor respectively; Said encoder also is connected with motion controller, and said shaft coupling is connected with pressurization bindiny mechanism, and said motion controller is provided with and is used for the control connection mechanism limit switch of stroke up and down.
2. the servo compression system of resistance spot welding according to claim 1 is characterized in that said top electrode is connected with bindiny mechanism, and bottom electrode is provided with a pedestal.
3. the servo compression system of resistance spot welding according to claim 2 is characterized in that said man-machine interactive system comprises LCD display, the keyboard that is connected with welding machine electric power.
4. the servo compression system of resistance spot welding according to claim 3 is characterized in that, said bindiny mechanism is connected with shaft coupling through screw mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202720403U CN202388117U (en) | 2011-07-29 | 2011-07-29 | Resistance spot welding servo pressurizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202720403U CN202388117U (en) | 2011-07-29 | 2011-07-29 | Resistance spot welding servo pressurizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202388117U true CN202388117U (en) | 2012-08-22 |
Family
ID=46663069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202720403U Expired - Fee Related CN202388117U (en) | 2011-07-29 | 2011-07-29 | Resistance spot welding servo pressurizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202388117U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267003A (en) * | 2011-07-29 | 2011-12-07 | 华南理工大学 | Resistance spot-welding servo pressurization system |
| CN103962695A (en) * | 2013-02-04 | 2014-08-06 | 日本亚比欧尼克斯股份有限公司 | Welding apparatus |
-
2011
- 2011-07-29 CN CN2011202720403U patent/CN202388117U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267003A (en) * | 2011-07-29 | 2011-12-07 | 华南理工大学 | Resistance spot-welding servo pressurization system |
| CN103962695A (en) * | 2013-02-04 | 2014-08-06 | 日本亚比欧尼克斯股份有限公司 | Welding apparatus |
| CN103962695B (en) * | 2013-02-04 | 2016-06-15 | 日本亚比欧尼克斯股份有限公司 | Welder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102267003A (en) | Resistance spot-welding servo pressurization system | |
| CN203540796U (en) | Peristaltic dispenser control device | |
| CN202317605U (en) | Numerical control press mounting device capable of accurately controlling pressure | |
| CN202720488U (en) | PLC based automatic control system for bending machine | |
| CN202388117U (en) | Resistance spot welding servo pressurizing system | |
| CN102830644A (en) | Five-axis high-speed dispensing robot servo control system | |
| CN203275602U (en) | Stepper motor lifespan test system | |
| CN204615564U (en) | A kind of reducing motor | |
| CN102841558A (en) | Five-axis full-automatic high speed dispensing robot servo-control system | |
| CN202694193U (en) | High-precision one-dimensional automatic calibration device | |
| CN202837911U (en) | Three-axis high speed adhesive dispensing robot servo control system | |
| CN203141215U (en) | Implementation device of numerical control machine tool control system | |
| CN105643628B (en) | The kinetic control system of Cartesian robot | |
| CN201776581U (en) | Welding torch oscillator | |
| CN202192367U (en) | Automobile filler cap welding equipment | |
| CN107414275A (en) | A kind of precision resistance mash welder and its resistance spot-welding servo system | |
| CN202837924U (en) | Four-axis high speed adhesive dispensing robot servo control system | |
| CN202725754U (en) | Servo indexing closed-loop control system on notching press | |
| CN203658796U (en) | Multi-axis movement control system development platform | |
| CN202929400U (en) | Servo control system of five-shaft fully-automatic high-speed dispensing robot | |
| CN105513484A (en) | Multi-functional motion control practical training platform | |
| CN206075105U (en) | A kind of all-electric servo pressing machine | |
| CN205466223U (en) | Cartesian robot's motion control system | |
| CN204759207U (en) | High accurate positioning control ware of gas suspension system with higher speed | |
| CN101436076A (en) | Automatic control system of hydraulic pump station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20140729 |
|
| EXPY | Termination of patent right or utility model |