CN202377674U - Current control system of inverter resistance welding machine - Google Patents
Current control system of inverter resistance welding machine Download PDFInfo
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- CN202377674U CN202377674U CN2011202720386U CN201120272038U CN202377674U CN 202377674 U CN202377674 U CN 202377674U CN 2011202720386 U CN2011202720386 U CN 2011202720386U CN 201120272038 U CN201120272038 U CN 201120272038U CN 202377674 U CN202377674 U CN 202377674U
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Abstract
The utility model discloses a current control system of an inverter resistance welding machine comprising a control circuit with DSP as a core and an inverter main circuit. A current sampling module and a voltage sampling module are disposed between the inverter main circuit and a load. The current sampling module and the voltage sampling module are connected with the control circuit with the DSP as the core. In the utility model, three segments of current can be used for the pulse heating, and the steps are as follows: an electrode of the inverter resistance welding machine can be pressed and stabilized, thereafter the current can be raised slowly, a first segment of pulse current can be set and then cooled; the second segment of pulse current can be set and then cooled; the third segment of pulse current can be set and then cooled, thereafter the current can be decreased slowly, and the electrode can be loosened. According to the requirement of the welding technology, the accurate adjustment as well as the dynamic monitoring can be performed, the flexibility of the welding machine can be increased by outputting various special, complicated current waveforms, the employing of the optimal current waveform welding joint can be possible, the industrial special and common quality requirement of resistance welding can be satisfied, the weldment stress can be reduced, and the higher welding quality as well as stability can be guaranteed.
Description
Technical field
The utility model relates to inversion electric resistance welder, relates in particular to a kind of current control system of inversion electric resistance welder.
Background technology
The process of single phase industrial frequence ac spot welding machine, DC pulse mash welder, three phase low frequency mash welder, secondary commutation formula and capacitance energy storage type mash welder has been experienced in the development of resistance spot weld, and the contravariant mash welder has appearred again in the mid-80.Resistance spot welding has extensively applied to industrial circles such as automobile, electronic apparatus, Aero-Space, and different industries all has its special technological requirement to resistance spot welding.Conventional welding methods such as condenser discharge spot welding, very limited to the control ability of current waveform, be difficult to guarantee the welding quality requirement, and the tangible spark of easy appearance splashes in the weldering process.As using the pulse output of capacitor-discharge formula spot welding power output staircase waveform among the patent CN201220323Y, can only provide single hop controlled electric current.And the welding method that a kind of segmentation applies pulse current is proposed among the patent CN101318256A, but power frequency is 1000Hz, 1200Hz or 1500Hz before the rectification, slightly inadequate when higher control accuracy requires.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming and defect of above-mentioned prior art; A kind of current control system of inversion electric resistance welder is provided; With respect to prior art; The utility model current parameters can be adjusted and dynamic monitoring according to welding process requirement with relevant time parameter accurately, when improving the welding machine flexibility, has guaranteed welding quality and stability.
The utility model is realized through following technical proposals:
A kind of current control system of inversion electric resistance welder; Comprise that DSP is control core circuit, inverter main circuit; Between inverter main circuit and load, be provided with current sample module and voltage sample module; Said current sample module is connected for the control core circuit with DSP with the voltage sample module, and said current control system also comprises transfinite an alarm or a lower limit warning device.
Said DSP is that the control core circuit also has been connected with display screen, button.
The current control method of the current control system of above-mentioned inversion electric resistance welder comprises three sections current impulse heating, the steps include: that the electrode of inversion electric resistance welder depresses and make it to stablize, then electric current delays liter, sets first section pulse current, cools off then; Set second section pulse current, cooling; Set the 3rd section pulse current, electric current slow falls then, electrode unclamps.
The size of three sections pulse current amplitudes is determined by concrete welding procedure, but the setting of every section current value all is fully independently, does not exist three sections electric current values to strengthen gradually or a certain section electric current value must be obviously greater than other regulations of two sections.Current range is 0～10000A, and current precision can reach 10A.The duration of every section current value is confirmed by corresponding umber of pulse, comes the current flow heats time of every section of accurately control through setting every section corresponding umber of pulse.When certain section was set to 0, this section was inoperative, and corresponding current settings is inoperative.Time range is 0～999ms, and precision can reach 0.25ms.Electric current and time parameter can be carried out dynamic monitoring.There are three kinds of monitoring modes optional: current-mode, voltage mode and power mode.Select a kind of pattern wherein, set three sections and add the upper lower limit value of pining for every section monitoring parameter, when certain parameter in the welding process is not in the bound scope, will cause warning.
Compared with prior art the beneficial effect of the utility model is:
The utility model system architecture is simple and easy to do; Control can realize three sections pulse current heating of selecting type flexibly, and the amplitude of three sections pulses can be independent fully adjustable according to concrete welding procedure; Electric current has slow the liter and slowly falls function, and the current work time can be set in wide range.Current parameters can be adjusted and dynamic monitoring according to welding process requirement with relevant time parameter accurately, has improved the flexibility of welding machine greatly, has guaranteed higher welding quality and stability simultaneously.
Fully independently setting when the utility model uses does not exist three sections electric current values to strengthen gradually or a certain section electric current value must be obviously greater than other regulations of two sections.The duration of every section current value is confirmed by corresponding umber of pulse, comes the current flow heats time of every section of accurately control through setting every section corresponding umber of pulse.When certain section was set to 0, this stage was inoperative, and corresponding current settings is inoperative.
The utility model can be selected current monitoring III, voltage monitoring UUU, three kinds of modes of power monitoring PPP.In every kind of monitor mode, all need set the higher limit and the lower limit of every section in three sections pulse currents.In welding process, any one section parameter all can cause transfinite alarm or lower limit warning when surpassing higher limit or being lower than lower limit.
Description of drawings
Fig. 1 is the utility model system architecture diagram.
Fig. 2 is the utility model system three sections heating current waveforms sketch map.
Fig. 3 is that the utility model systematic parameter is regulated screen interface sketch map.
Fig. 4 is the utility model system monitor parameters screen interface sketch map.
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 current control system of the utility model inversion electric resistance welder; Comprise that DSP is control core circuit, inverter main circuit; Between inverter main circuit and load, be provided with current sample module and voltage sample module, said current sample module is connected for the control core circuit with DSP with the voltage sample module.
Said current control system also comprises transfinite an alarm or a lower limit warning device.
Said DSP is that the control core circuit also has been connected with display screen, button.
Inverter main circuit is accomplished the power converter process according to the preceding control parameter of setting of welding, and suitable voltage, the magnitude of current are added in load, realizes high-precision welding process.
Current sample module and voltage sample module are introduced DSP to realize closed-loop control after the signal that samples is passed through proper transformation.DSP is the sampling that the control core circuit is mainly accomplished feedback signals such as electric current, voltage, the various analytical calculations that control procedure is required, and the output of control signal is with communicating by letter of various peripheral hardwares etc.LCD display and button are used, and accomplish electric current, functions such as the state demonstration of the input of time and various monitoring parameters and welding process.
Like Fig. 2, shown in Figure 3.The current control method of the current control system of above-mentioned inversion electric resistance welder comprises three sections current impulse heating, the steps include: that the electrode of inversion electric resistance welder depresses and make it to stablize, then electric current delays liter, sets first section pulse current, cools off then; Set second section pulse current, cooling; Set the 3rd section pulse current, electric current slow falls then, electrode unclamps.Current control method of the present invention is mainly realized for the control core circuit by DSP.
Current settings is divided into 3 parameters, is respectively: I1 is first section pulse current; I2 is second section pulse current; I3 is the 3rd a section pulse current.These three sections pulse currents can be set through the button on spot welding power panel input analog value is independent fully, do not exist three sections electric current values to strengthen gradually or a certain section electric current value must be obviously greater than other regulations of two sections.
The utility model can be according to weld cycle and three sections demand of heating, and the time is divided into 11 sections controls, and each section of t0～t10 is like Fig. 2 and shown in Figure 3.Time through by every section of key assignments is that unit measures through umber of pulse, and umber of pulse and the product of unit pulse time are the running time of this section.The main time period is set explanation: t1, t2 guarantee the time that electrode depresses and make pressure stability to need, and prevent that deficiency of time from bringing splash early stage.T4, t6, t8 are each time energising heat time heating time, and the length of time is relevant with technological requirement, and when certain section was set to 0, this stage was inoperative, and corresponding current settings is inoperative.T5, t7 are cool time.The time interval between twice heating is suitably cooled off the thermal treatment zone, again heating.T0 is the stop time, is the circulation of this welding pressure and the blanking time of welding next time, when continuous welding (CTW), guarantees that workpiece sends to.Its value influences speed of welding.
As shown in Figure 4, condition monitoring is divided into electric current, voltage and three kinds of patterns of power monitoring.Set each parameter upper lower limit value and selected monitoring mode through button.Specify as follows:
I1H is electric current 1 upper limit, and I2H is electric current 2 upper limits, and I3H is electric current 3 upper limits.
I1L is electric current 1 lower limit, and I2L is electric current 2 lower limits, and I3L is electric current 3 lower limits.
When monitor state III/UUU/PPP was in the III state, current monitoring worked.Report to the police through electric current overload alarm device this moment when the actual current value of each time heating is higher than corresponding capping; And the actual current value of each subpulse current flow heats is lower than under the corresponding setting in limited time, and undercurrent is reported to the police.
The basis of design test of electric current bound is judged.Current monitoring is monitor mode commonly used.
Likewise, optional in this instantiation method for supervising and current monitoring are similar with voltage and power monitoring mode, and the optional voltage monitoring of using under the high resistivity electrode condition, the optional power monitor mode of using of the spot welding of projection welding, special material.
But three sections pulse current heatings of the utility model selecting type can realize nonferrous materials such as copper, aluminium, alloy material, and the high-quality welding of precision component etc. reaches welding process requirement.
Preparation before the welding should be carried out the preceding hardware preparation of welding, opens power supply; Through the welding machine human-computer interaction interface to three sections current parameters and correlation time parameter set; Through the welding machine human-computer interaction interface monitoring parameter is set; Confirm that each setting state is correct, inspection machinery is normal, and starting switch carries out the During normal welding process.
Just can realize the utility model preferably as stated.
Claims (3)
1. the current control system of an inversion electric resistance welder; It is characterized in that: comprise that DSP is control core circuit, inverter main circuit; Between inverter main circuit and load, be provided with current sample module and voltage sample module, said current sample module is connected for the control core circuit with DSP with the voltage sample module.
2. the current control system of inversion electric resistance welder according to claim 1 is characterized in that: said current control system also comprises transfinite an alarm or a lower limit warning device.
3. the current control system of inversion electric resistance welder according to claim 2, it is characterized in that: said DSP is that the control core circuit also is connected with display screen, button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202720386U CN202377674U (en) | 2011-07-29 | 2011-07-29 | Current control system of inverter resistance welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202720386U CN202377674U (en) | 2011-07-29 | 2011-07-29 | Current control system of inverter resistance welding machine |
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| Publication Number | Publication Date |
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| CN202377674U true CN202377674U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202720386U Expired - Fee Related CN202377674U (en) | 2011-07-29 | 2011-07-29 | Current control system of inverter resistance welding machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264244A (en) * | 2013-05-22 | 2013-08-28 | 广州市精源电子设备有限公司 | Thermal compression bonding power source |
| CN108127215A (en) * | 2017-12-26 | 2018-06-08 | 重庆平伟汽车科技股份有限公司 | A kind of method for reducing spot welding and splashing |
| CN108614484A (en) * | 2018-05-11 | 2018-10-02 | 大族激光科技产业集团股份有限公司 | A kind of electric current burns the control method and its burning ball control system of ball |
-
2011
- 2011-07-29 CN CN2011202720386U patent/CN202377674U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264244A (en) * | 2013-05-22 | 2013-08-28 | 广州市精源电子设备有限公司 | Thermal compression bonding power source |
| CN108127215A (en) * | 2017-12-26 | 2018-06-08 | 重庆平伟汽车科技股份有限公司 | A kind of method for reducing spot welding and splashing |
| CN108614484A (en) * | 2018-05-11 | 2018-10-02 | 大族激光科技产业集团股份有限公司 | A kind of electric current burns the control method and its burning ball control system of ball |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20130729 |