CN104162736A - Welding current control system of steel grating press welder - Google Patents
Welding current control system of steel grating press welder Download PDFInfo
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- CN104162736A CN104162736A CN201410439482.0A CN201410439482A CN104162736A CN 104162736 A CN104162736 A CN 104162736A CN 201410439482 A CN201410439482 A CN 201410439482A CN 104162736 A CN104162736 A CN 104162736A
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- control system
- welding
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- steel
- detecting device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses a welding current control system of a steel grating press welder and relates to the technical field of steel grating welding. The control system comprises a hydraulic system, a position detecting device, a limiting switch, a control system body, a thyristor and welding electrodes, wherein the limiting switch, the control system body, the thyristor and the welding electrodes are installed on equipment. The control system body comprises a controller and a digital-analog converter. The output end of the positioning detecting device is connected with the input end of the controller. The output end of the controller is connected with the input end of the thyristor through the digital-analog converter. The output end of the thyristor is connected with the welding electrodes. The control end of the hydraulic system is connected with steel strips. The welding electrodes make contact with the two steel strips respectively. The position detecting device is arranged at the control end of the hydraulic system. According to the control system, many adverse effects on the equipment are reduced, the situation that a large current is used for welding at the very beginning is avoided, the welding current is reduced, and therefore the effect of energy saving is achieved; besides, factors of manual operation are removed, so that product quality is improved.
Description
Technical field
The present invention relates to steel grating plate welding technology field.
Background technology
Steel grating welding refers to steel bar is twisted into twisted shape, then steel bar is welded on band steel, and at present, domestic steel grating welding equipment is to adopt resistance welded technology mostly, produces heat reach welding object with large electric current.There is following problem in this mode: in every step welding process, rush of current is large, and the welding of workpiece is easy to cause the consequence that superfusion even can not moulding, and the harm that welding source is caused is also very large, comprises that rectification diode and soft connection device also have adverse effect.For some specification product needed manually adjust welding pressure, the contact resistance size that changes workpiece completes, so just cause waste also to bring many unfavorable factors to hydraulic test to the energy, owing to being manual adjustments by manually carrying out and by the way of observing survey, quality to product does not ensure, inefficiency.
Need now a kind of electric current welding control system that can address the above problem for the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of steel grating press welder welding current control system, in the time having welding enabling signal, welding process is carried out in the ascending variation of electric current, the many adverse effects to equipment are reduced, avoid using at the very start large electric current to weld, reduce welding current and played energy-conservation effect, and removed the factor of manual operation, improved the quality of products.
For addressing the above problem, the technical scheme that the present invention takes is: a kind of steel grating press welder welding current control system, comprise hydraulic system, position detecting device and be arranged on the limit switch on equipment, control system, controllable silicon, welding electrode, described control system comprises controller and digital to analog converter, the output of described position detecting device is connected with the input of controller, the output of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled output is connected with welding electrode, the control end of described hydraulic system is connected with steel bar, described welding electrode contacts with two steel bars respectively, described position detecting device is located at the control end of hydraulic system.
Preferably, described silicon controlled output current is controlled by controller, and described silicon controlled output current intensity and time are linear, becomes in time and gradually large, and with fixing peak point current.
Preferably, controllable silicon is realized the output size of electric current by controlling the angle of flow.
Preferably, described hydraulic system comprises dynamical element, executive component, control element, auxiliary element and hydraulic jack.
The beneficial effect that adopts technique scheme to produce is: this system is by position detecting device transmission of signal, in the time of welding electrode contact steel bar, produce signal and send controller to, controller sends signal, after digital to analog converter, signal is passed to controllable silicon, thereby make controllable silicon apply trigger voltage to welding electrode, it is size-controlled in controller, change from small to big gradually through the electric current of steel bar over time, when arriving certain current value, electric current no longer changes, so silicon controlled output current intensity and time are linear, and with fixing peak point current, while namely beginning from welding to the maximum sloping of electric current form, this kind of control mode avoided applying excessive electric current at steel bar two ends at the very start and cause even can not moulding to steel bar superfusion consequence, avoid the harm that welding source and rectification diode and soft connection device are caused, and remove artificial manually operated factor, improve product quality.
Brief description of the drawings
Fig. 1 theory diagram of the present invention;
Fig. 2 welding structure schematic diagram of the present invention;
Fig. 3 is electric current function figure in time,
Fig. 4 welding source schematic diagram.
Wherein, 1, steel bar, 2, welding electrode, 3, band steel.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation:
A kind of steel grating press welder welding current control system, comprise hydraulic system, position detecting device and be arranged on the limit switch on equipment, control system, controllable silicon, welding electrode 2, described control system comprises controller and digital to analog converter, the output of described position detecting device is connected with the input of controller, the output of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled output is connected with welding electrode 2, the control end of described hydraulic system is connected with steel bar 1, described welding electrode 2 contacts with two steel bars 1 respectively, described position detecting device is located at the control end of hydraulic system, as shown in Figure 1: the output of described position detecting device is connected with the input of controller, the output of described controller is connected with controllable silicon after digital to analog converter.
Silicon controlled output voltage is controlled by controller, and described silicon controlled output current intensity and time are linear, becomes in time and gradually large, and with fixing peak point current.Welding electrode 2 is realized the output size of electric current by controlling the silicon controlled angle of flow.Described hydraulic system comprises dynamical element, executive component, control element, auxiliary element and hydraulic oil.
Steel grating plate is to be spliced by horizontal band steel and vertical steel bar 1, steel bar 1 is first twisted into twisted shape and then by steel bar 1 welding on band steel 3, side view while being illustrated in figure 2 steel bar 1 and band steel 3 welding, at present, domestic steel grating welding equipment is to adopt resistance welded technology mostly, exactly by utilizing electric current at the heat producing through steel bar 1 and band steel 3 contact points, steel bar 1 being fused on band steel 3 after energising, (Q=I in the constant situation of voltage
2rt), steel bar 1 is less with the larger resistance of contact area of band steel 3, heat is less, along with the hydraulic system of carrying out of welding applies suitable pressure by steel bar 1 again then in band steel 3, it is fused together, and fusion process is now because now resistance is very large in the time that steel bar 1 contacts band steel 3 at the beginning, must apply larger electric current can fuse, excessive electric current can produce superfusion to product, equipment etc. cause adverse influence, moreover along with the resistance that carries out of welding diminishes gradually, the heat of its generation can reduce, can cause fusion bad to steel bar 1 and band steel 3, affect product quality, if manually regulated, prevent that resistance moment from diminishing, like this neither be very well what control, so the present invention has designed this welding current control system.
In this control system, be applied to silicon controlled size of current and be controlled by controller, controller sends signal control thyristor trigger voltage, put on welding electrode 2, change the angle of flow of silicon controlled and make to be applied to electric current on welding electrode 2 from zero to maximum, be in time linear change, and be finally stabilized in maximum until steel bar 1 is welded in band steel 3 completely, heat between steel bar 1 and band steel 3 is to become gradually large like this, make it to heat up slowly and merge gradually, avoid the drawback that electric current is excessive produced, and the effect of position detecting device is in touching steel bar 1, to produce a triggering signal at welding electrode 2 at the beginning, be sent to controller, controller is started to controllable silicon transmission of signal, make controllable silicon apply voltage to welding electrode 2, controller can be given the continuous transfer overvoltage signal of controllable silicon over time, make to become gradually large by the electric current of steel bar 1, finally keep constant in maximum, m-current function graph of a relation while being illustrated in figure 3, electric current through steel bar 1 changes from small to big gradually, when arriving certain current value, electric current no longer changes, so silicon controlled output current intensity and time are linear, and with fixing peak point current, while namely beginning from welding to the maximum sloping of electric current form, because resistance diminishes gradually, so voltage signal is not even variation, its variation pattern is to rise than making electric current keep linear after upper resistance.
The beneficial effect of this system be this kind of control mode avoided at the very start steel bar apply excessive electric current and cause even can not moulding to steel bar superfusion consequence, avoid the harm that welding source and rectification diode and soft connection device are caused, and remove artificial manually operated factor, improved product quality.
Claims (4)
1. a steel grating press welder welding current control system, it is characterized in that: comprise hydraulic system, position detecting device and be arranged on the limit switch on equipment, control system, controllable silicon, welding electrode (2), described control system comprises controller and digital to analog converter, the output of described position detecting device is connected with the input of controller, the output of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled output is connected with welding electrode (2), the control end of described hydraulic system is connected with steel bar (1), described welding electrode (2) contacts with two steel bars (1) respectively, described position detecting device is located at the control end of hydraulic system.
2. steel grating press welder welding current control system according to claim 1, it is characterized in that: described silicon controlled output current is controlled by controller, described silicon controlled output current intensity and time are linear, become in time and gradually large, and with fixing peak point current.
3. steel grating press welder welding current control system according to claim 2, is characterized in that: controllable silicon is realized the output size of electric current by controlling the angle of flow.
4. steel grating press welder welding current control system according to claim 3, is characterized in that: described hydraulic system comprises dynamical element, executive component, control element, auxiliary element and hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439482.0A CN104162736B (en) | 2014-09-01 | 2014-09-01 | Steel grating press welder welding current control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439482.0A CN104162736B (en) | 2014-09-01 | 2014-09-01 | Steel grating press welder welding current control system |
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| Publication Number | Publication Date |
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| CN104162736A true CN104162736A (en) | 2014-11-26 |
| CN104162736B CN104162736B (en) | 2016-08-24 |
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| CN201410439482.0A Active CN104162736B (en) | 2014-09-01 | 2014-09-01 | Steel grating press welder welding current control system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629783A (en) * | 1985-07-05 | 1987-01-17 | Honda Motor Co Ltd | Device for detecting electrode derailment in seam welding machine |
| CN1775447A (en) * | 2005-12-09 | 2006-05-24 | 新兴铸管股份有限公司 | Steel checkerboard pressure welding machine |
| CN101637848A (en) * | 2009-08-17 | 2010-02-03 | 无锡威华电焊机制造有限公司 | Welding power source of steel-grating press welder by using inverting technique |
| CN102554430A (en) * | 2010-12-30 | 2012-07-11 | 上海莲南汽车附件有限公司 | Special multipoint electric resistance welding method |
| CN202607066U (en) * | 2012-06-21 | 2012-12-19 | 新兴铸管股份有限公司 | Improved steel grating press welder |
| CN103801583A (en) * | 2014-02-13 | 2014-05-21 | 风范绿色建筑（常熟）有限公司 | Machining technique for high-specification directly formed square rectangular pipe |
-
2014
- 2014-09-01 CN CN201410439482.0A patent/CN104162736B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629783A (en) * | 1985-07-05 | 1987-01-17 | Honda Motor Co Ltd | Device for detecting electrode derailment in seam welding machine |
| CN1775447A (en) * | 2005-12-09 | 2006-05-24 | 新兴铸管股份有限公司 | Steel checkerboard pressure welding machine |
| CN101637848A (en) * | 2009-08-17 | 2010-02-03 | 无锡威华电焊机制造有限公司 | Welding power source of steel-grating press welder by using inverting technique |
| CN102554430A (en) * | 2010-12-30 | 2012-07-11 | 上海莲南汽车附件有限公司 | Special multipoint electric resistance welding method |
| CN202607066U (en) * | 2012-06-21 | 2012-12-19 | 新兴铸管股份有限公司 | Improved steel grating press welder |
| CN103801583A (en) * | 2014-02-13 | 2014-05-21 | 风范绿色建筑（常熟）有限公司 | Machining technique for high-specification directly formed square rectangular pipe |
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| CN104162736B (en) | 2016-08-24 |
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