CN104162736B - Steel grating press welder welding current control system - Google Patents
Steel grating press welder welding current control system Download PDFInfo
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- CN104162736B CN104162736B CN201410439482.0A CN201410439482A CN104162736B CN 104162736 B CN104162736 B CN 104162736B CN 201410439482 A CN201410439482 A CN 201410439482A CN 104162736 B CN104162736 B CN 104162736B
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- control system
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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 kind of steel grating press welder welding current control system, relate to steel grating plate welding technology field.Including hydraulic system, position detecting device and the limit switch being arranged on equipment, control system, controllable silicon, welding electrode, described control system includes controller and digital to analog converter, the outfan of described position detecting device is connected with the input of controller, the outfan of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled outfan is connected with welding electrode, the control end of hydraulic system is connected with steel bar, welding electrode contacts with two steel bars respectively, and described position detecting device is located at the control end of hydraulic system.This control system decreases the many adverse effects to equipment, it is to avoid use the big electric current to weld at the very start, reduces welding current and plays energy-conservation effect, and removes the factor of manual operation, improves product quality.
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, is then welded on band steel by steel bar, and at present, domestic steel grating welding equipment is to use resistance welding techniques mostly, produces heat with big electric current and reaches welding purpose.This mode there is problems in that often rush of current is big in step welding process, the welding of workpiece is easily caused superfusion even can not the consequence of molding, the harm causing welding source is the biggest, also adversely affects including rectification diode and soft connection device.For some specification product needed manually adjust welding pressure, the contact resistance size changing workpiece completes, thus the energy is caused waste hydraulic test is also brought many unfavorable factors, owing to being the manually regulation manually carried out and by the way observing survey, the quality of product is not ensured, inefficiency.
A kind of electric current welding control system that can solve the problem that the problems referred to above is needed now 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, when there being welding enabling signal, the ascending change of electric current carries out welding process, decrease the many adverse effects to equipment, avoid and use big electric current to weld at the very start, reduce welding current and play energy-conservation effect, and remove the factor of manual operation, improve product quality.
For solving the problems referred to above, the present invention adopts the technical scheme that: a kind of steel grating press welder welding current control system, including hydraulic system, position detecting device and the limit switch being arranged on equipment, control system, controllable silicon, welding electrode, described control system includes controller and digital to analog converter, the outfan of described position detecting device is connected with the input of controller, the outfan of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled outfan 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, the output of described silicon controlled is current controlled in controller, and described silicon controlled output current intensity is linear with the time, becomes larger in time, and with fixing peak point current.
Preferably, controllable silicon realizes the output size of electric current by controlling the angle of flow.
Preferably, described hydraulic system includes dynamical element, executive component, control element, auxiliary element and hydraulic jack.
nullUse and have the beneficial effects that produced by technique scheme: this system transmits signal by position detecting device，When welding electrode contact steel bar when, produce signal send controller to，Controller sends signal, after digital to analog converter, signal is passed to controllable silicon，So that controllable silicon applies trigger voltage to welding electrode，It is size-controlled in controller，Electric current through steel bar gradually changes from small to big over time，The when of arriving certain current value, electric current no longer changes，So silicon controlled output current intensity is linear with the time，And with fixing peak point current，Namely to electric current maximum sloping form when welding starts,This kind of control mode avoid apply excessive electric current at steel bar two ends at the very start and cause even can not the consequence of molding to steel bar superfusion，Avoid the harm that welding source and rectification diode and soft connection device are caused，And remove the factor of artificial manual operation，Improve product quality.
Accompanying drawing explanation
The theory diagram of Fig. 1 present invention；
The welding structure schematic diagram of Fig. 2 present invention；
Fig. 3 is electric current function variation diagram 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, including hydraulic system, position detecting device and the limit switch being arranged on equipment, control system, controllable silicon, welding electrode 2, described control system includes controller and digital to analog converter, the outfan of described position detecting device is connected with the input of controller, the outfan of described controller is connected with silicon controlled input after digital to analog converter, described silicon controlled outfan 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 outfan of described position detecting device is connected with the input of controller, the outfan 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 is linear with the time, becomes larger in time, and with fixing peak point current.Welding electrode 2 realizes the output size of electric current by controlling the silicon controlled angle of flow.Described hydraulic system includes 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 the most again by steel bar 1 welding on band steel 3, it is illustrated in figure 2 side view when steel bar 1 and band steel 3 welding, at present, domestic steel grating welding equipment is to use resistance welding techniques mostly, electric current is utilized to be fused on band steel 3 by steel bar 1 at the heat produced through steel bar 1 and band steel 3 contact point after being through energising, (Q=I in the case of voltage is constant2Rt), the biggest resistance is the least with the contact area of band steel 3 for steel bar 1, heat is the least, along with steel bar 1 is applied the most again suitable pressure in band steel 3 by the hydraulic system that carries out of welding, make it fuse together, and fusion process now is owing to now resistance is the biggest when steel bar 1 contacts band steel 3 at the beginning when, bigger electric current must be applied can fuse, excessive electric current can produce superfusion to product, equipment etc. adversely affect, moreover along with the resistance that carries out of welding tapers into, its heat produced can reduce, steel bar 1 and band steel 3 can cause fusion bad, affect product quality, if be manually adjusted, prevent resistance moment from diminishing, so control be not very well, so the present invention devises this welding current control system.
nullThis control system is applied to silicon controlled size of current and is controllable by controller，Controller sends signal control thyristor trigger voltage，Put on welding electrode 2，The angle of flow changing silicon controlled makes the electric current being applied on welding electrode 2 from the zero to maximum，The most linearly change，And finally stablize at maximum until steel bar 1 is welded in band steel 3 completely，So heat between steel bar 1 and band steel 3 becomes larger，Being allowed to carries out heating up slowly gradually merges，Avoid the excessive produced drawback of electric current，And the effect of position detecting device is to produce one welding electrode 2 at the beginning touches steel bar 1 when to trigger signal，It is sent to controller，Make controller start to controllable silicon and transmit signal，Controllable silicon is made to apply voltage to welding electrode 2，Controller can give controllable silicon continuous transfer overvoltage signal over time，Make to be become larger by the electric current of steel bar 1，Finally keep constant at maximum，M-current function graph of a relation when being illustrated in figure 3，Electric current through steel bar 1 gradually changes from small to big，The when of arriving certain current value, electric current no longer changes，So silicon controlled output current intensity is linear with the time，And with fixing peak point current，Namely to electric current maximum sloping form when welding starts,Owing to resistance tapers into，So voltage signal is not even variation，Its variation pattern is that ratio makes electric current keep linear rise after upper resistance.
This system have the beneficial effects that this kind of control mode avoid apply excessive electric current at steel bar at the very start and cause even can not the consequence of molding to steel bar superfusion, avoid the harm that welding source and rectification diode and soft connection device are caused, and remove the factor of artificial manual operation, improve product quality.
Claims (3)
- null1. a steel grating press welder welding current control system，It is characterized in that: include hydraulic system、Position detecting device and the limit switch being arranged on equipment、Control system、Controllable silicon、Welding electrode (2)，Described control system includes controller and digital to analog converter，The outfan of described position detecting device is connected with the input of controller，The outfan of described controller is connected with silicon controlled input after digital to analog converter，Described silicon controlled outfan 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，The output of described silicon controlled is current controlled in controller，Described silicon controlled output current intensity is linear with the time，Become larger in time，And with fixing peak point current.
- Steel grating press welder welding current control system the most according to claim 1, it is characterised in that: controllable silicon realizes the output size of electric current by controlling the angle of flow.
- Steel grating press welder welding current control system the most according to claim 2, it is characterised in that: described hydraulic system includes 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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| CN104162736A CN104162736A (en) | 2014-11-26 |
| CN104162736B true CN104162736B (en) | 2016-08-24 |
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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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| CN104162736A (en) | 2014-11-26 |
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