CN201136079Y - Intermediate frequency parallel voltage transformation and rectification circuit of resistance spot welding machine - Google Patents
Intermediate frequency parallel voltage transformation and rectification circuit of resistance spot welding machine Download PDFInfo
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- CN201136079Y CN201136079Y CNU2007200996319U CN200720099631U CN201136079Y CN 201136079 Y CN201136079 Y CN 201136079Y CN U2007200996319 U CNU2007200996319 U CN U2007200996319U CN 200720099631 U CN200720099631 U CN 200720099631U CN 201136079 Y CN201136079 Y CN 201136079Y
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- 238000003466 welding Methods 0.000 title claims abstract description 27
- 230000009466 transformation Effects 0.000 title abstract 4
- 230000008859 change Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model relates to a medium-frequency transformation and rectification circuit for an electric resistance spot welder. The circuit is composed of a control case, transformers and rectification sleeve circuits and is mainly technically characterized in that a main power supply outputted by the control case is connected in parallel with primary coils of three transformers; the primary coils of the three transformers are respectively connected with a rectification sleeve circuit and then together connected to a welding electrode; center taps of the primary coils of the three transformers are respectively connected to another welding electrode. The medium-frequency transformation and rectification circuit of the electric resistance spot welder adopts the design structure that three transformers are connected with the rectification sleeves in parallel, and has the advantages of stable performance, small volume and light weight, and meanwhile reduces the production cost and the repair cost of the device, and improves the production efficiency, thereby the medium-frequency transformation and rectification circuit can be widely applied to electric resistance welding devices in the car industry.
Description
Technical field
The utility model belongs to electric resistance welding equipment, especially a kind of intermediate frequency parallel pressure change and rectification circuit of resistance spot weld.
Background technology
Fixed resistance spot weld and projection welder are electric resistance welding equipments important in the automobile manufacture industry, its be mainly used between the sheet material and sheet material and project-welding nut between welding.Develop rapidly along with automobile industry, demand to this class welding machine is more and more, performance requirement is also more and more higher, for example, when many truck manufacturing enterprises use fixed resistance spot weld to weld the truck bottom girder, because requirements such as the steel plate of truck bottom girder is thicker, volume big, the technology solder joint is more even require three layers of specific (special) requirements such as welding, and therefore the welding procedure that requires is very harsh, and is big as welding current, that weld interval is long, arcing time factor is high, welding pressure is big.At present, the domestic high-power three-phase medium frequency inverter secondary commutation technology of the general employing of fixed spot welder that is applied to the welding of truck bottom girder, as shown in Figure 2, this circuit adopts the connected mode of the rectification cover that a transformer and is made of two groups of four commutation diodes in parallel, though adopt high-power three-phase inversion secondary commutation technology to overcome some shortcomings of power frequency welding machine in the past, it is steady to have welding current, spatter is little, quality of welding spot is good, advantages such as welding control is accurate, but because the restriction on the employed power electric component performance, after power is brought up to 300kVA, have the following problem: 1. the volume of transformer becomes excessive, give and make, installation brings difficulty, and damages the back complete machine and scrap waste seriously; 2. the welding current of super large (generally more than 25000A) requires to use the use in parallel of powerful welding rectifier diode, because arcing time factor is very high, weld interval is very long, and working environment is very abominable, rectifying tube works overloadingly for a long time, therefore, cause the service life of rectifying tube very short, and, in case there is a rectifying tube to damage, rectifying tube on the complete equipment all needs to change, and causes day-to-day loss very huge, has huge waste; 3. maintenance difficult after resistance spot weld breaks down, the maintenance time that needs is long, reduces productivity ratio greatly.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of stable performance, volume little, in light weight, save cost and the intermediate frequency parallel pressure change and the rectification circuit of the resistance spot weld being convenient to keep in repair.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of intermediate frequency parallel pressure change and rectification circuit of resistance spot weld, constitute by control cabinet, transformer and rectification cover circuit, it is characterized in that: the main power source of control cabinet output is connected with the parallel connection of primary windings of three transformers, the secondary coil of three transformers is connected on the welding electrode after connecting rectification cover circuit respectively jointly, and the centre tap of the secondary coil of three transformers is connected on another welding electrode jointly.
And described rectification cover is connected and composed by the commutation diode of two parallel connections.
And the performance parameter of described transformer is identical, and the performance parameter of described commutation diode is identical.
Advantage of the present utility model and good effect are:
1. intermediate frequency parallel pressure change of this resistance spot weld and rectification circuit adopt three transformers connected in parallel and three rectification cover circuit project organizations in parallel, the load that makes every transformer and rectification cover circuit bear only is 1/3rd of former transformer and rectification cover circuit, therefore when design transformer and selection rectifying tube, just can select less model, improved the reliability of equipment, prolong the service life of equipment, reduced production cost and maintenance cost.
2. intermediate frequency parallel pressure change of this resistance spot weld and rectification circuit adopt three transformers connected in parallel and three rectification cover circuit project organizations in parallel, because transformer and rectification cover circuit exist internal resistance, the total internal resistance in back in parallel will reduce, thereby reduced the secondary voltage of transformer, and because the reduction of service load, the heat radiation of transformer requires to reduce relatively, therefore, the volume and weight of transformer can reduce greatly, is convenient to manufacturing, installation and maintenance.
3. intermediate frequency parallel pressure change of this resistance spot weld and rectification circuit adopt modularized design, have and make and advantage easy to maintenance, if there is a transformer or rectification cover to damage, the module that then only needs to damage unloads, the all right operate as normal of remaining module, shorten downtime, improved production efficiency.
4. the utlity model has stable work in work, little, the lightweight characteristics of volume, reduced the manufacturing cost and the maintenance cost of equipment simultaneously, improved production efficiency.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Fig. 2 is the circuit theory diagrams of prior art.
The specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described.
The intermediate frequency parallel pressure change and the rectification circuit of this resistance spot weld, constitute by control cabinet (not shown), three identical transformer L1, L2, L3 and three identical rectification cover circuit of performance parameter of performance, each rectification cover circuit is made of the commutation diode of two parallel connections, the rectifications cover 3 that the rectification cover 3 that the rectification cover 1 that promptly is made of rectifying tube D1, D2 respectively, the rectification cover 2 that rectifying tube D3, D4 constitute and rectifying tube D5, D6 constitute constitutes, wherein, the performance parameter of each commutation diode is identical.The main power source of control cabinet output is connected with the primary coil of three transformers respectively, the secondary coil of every transformer is connected in parallel as the one-level in transformer secondary output loop after connecting rectification cover respectively, the centre tap of the secondary coil of every transformer is connected in parallel as another utmost point in transformer secondary output loop, and two welding pole plate P that above-mentioned two-stage connects bonding machine more respectively go up the complete transformer secondary output loop of formation.
This control circuit is connected in parallel three transformers connected in parallel and three rectification cover circuit, every transformer and rectification cover circuit can be regarded a direct voltage source as, therefore, this connected mode can be regarded the parallel connection of three direct voltage sources as, according to Kirchhoff's current law (KCL) as can be known, the electric current by weldment is the electric current sum of overlapping circuit by every transformer and rectification.Analyze in view of the above, if the electric current by weldment is identical with the welding current of (as shown in Figure 2) in the prior art, so every transformer and rectification cover circuit the electric current of process be exactly 1/3rd of welding current, therefore, greatly reduce transformer and rectification cover circuit the electric current of process, the index request of the commutation diode in transformer and the rectification cover circuit is reduced greatly.
Embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the specific embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (3)
1. the intermediate frequency parallel pressure change and the rectification circuit of a resistance spot weld, constitute by control cabinet, intermediate-frequency transformer and rectification cover circuit, it is characterized in that: the main power source of control cabinet output is connected with the parallel connection of primary windings of three transformers, the secondary coil of three transformers is connected on the welding electrode after connecting rectification cover circuit respectively jointly, and the centre tap of the secondary coil of three transformers is connected on another welding electrode jointly.
2. the intermediate frequency parallel pressure change and the rectification circuit of resistance spot weld according to claim 1, it is characterized in that: described rectification cover is connected and composed by the commutation diode of two parallel connections.
3. the intermediate frequency parallel pressure change and the rectification circuit of resistance spot weld according to claim 1 and 2, it is characterized in that: the performance parameter of described intermediate-frequency transformer is identical, and the performance parameter of described commutation diode is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200996319U CN201136079Y (en) | 2007-12-29 | 2007-12-29 | Intermediate frequency parallel voltage transformation and rectification circuit of resistance spot welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200996319U CN201136079Y (en) | 2007-12-29 | 2007-12-29 | Intermediate frequency parallel voltage transformation and rectification circuit of resistance spot welding machine |
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| Publication Number | Publication Date |
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| CN201136079Y true CN201136079Y (en) | 2008-10-22 |
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| CNU2007200996319U Expired - Fee Related CN201136079Y (en) | 2007-12-29 | 2007-12-29 | Intermediate frequency parallel voltage transformation and rectification circuit of resistance spot welding machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011116544A1 (en) * | 2010-03-23 | 2011-09-29 | 深圳市鸿栢科技实业有限公司 | Resistance welding high frequency transformer and spot welding machine |
| CN106141400A (en) * | 2015-04-23 | 2016-11-23 | 上海通用汽车有限公司 | A kind of resistance spot welding system |
| CN107855676A (en) * | 2017-11-07 | 2018-03-30 | 成都航睿科精密机械有限公司 | The welding system of metal o-ring |
| CN115421438A (en) * | 2022-09-05 | 2022-12-02 | 天津七所高科技有限公司 | A control system and method for multiple resistance welding machines connected in parallel to output high current |
-
2007
- 2007-12-29 CN CNU2007200996319U patent/CN201136079Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011116544A1 (en) * | 2010-03-23 | 2011-09-29 | 深圳市鸿栢科技实业有限公司 | Resistance welding high frequency transformer and spot welding machine |
| EP2551861A4 (en) * | 2010-03-23 | 2016-03-23 | Shenzhen Hongbai Technology Ind Co Ltd | HIGH FREQUENCY TRANSFORMER FOR RESISTANCE WELDING AND POINT WELDING MACHINE |
| CN106141400A (en) * | 2015-04-23 | 2016-11-23 | 上海通用汽车有限公司 | A kind of resistance spot welding system |
| CN107855676A (en) * | 2017-11-07 | 2018-03-30 | 成都航睿科精密机械有限公司 | The welding system of metal o-ring |
| CN115421438A (en) * | 2022-09-05 | 2022-12-02 | 天津七所高科技有限公司 | A control system and method for multiple resistance welding machines connected in parallel to output high current |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20081022 Termination date: 20131229 |