CN201109004Y - Capacitor discharging stud welding machine - Google Patents
Capacitor discharging stud welding machine Download PDFInfo
- Publication number
- CN201109004Y CN201109004Y CNU200720079362XU CN200720079362U CN201109004Y CN 201109004 Y CN201109004 Y CN 201109004Y CN U200720079362X U CNU200720079362X U CN U200720079362XU CN 200720079362 U CN200720079362 U CN 200720079362U CN 201109004 Y CN201109004 Y CN 201109004Y
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- welding machine
- capacitor
- circuit
- rectifier
- welding
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Abstract
The utility model discloses a condenser discharge stud welding machine, which comprises a welding circuit and a switch power circuit of which the input end is connected with an AC supply and the output end is connected with the welding circuit. The switch power circuit comprises a rectifier V1 connected with the AC supply, an inverting circuit connected with the rectifier V1, a rectifier V2 connected with the inverting circuit, and a filter LC connected with the rectifier V2 and the welding circuit. The condenser discharge stud welding machine adopts a switch power with constant-current characteristic to replace a condenser discharge power supply in a general welding machine, not only a current-limiting resistor is cancelled, the charge time is shortened, and the efficiency is improved, but also the volume and the weight of the welding machine are reduced.
Description
Technical field
The utility model relates to a kind of arc stud welding meets sb. at the airport, and relates in particular to a kind of capacitor discharge stud welding machine that is mainly used in materials such as carbon steel, stainless steel, aluminium or copper.
Background technology
The capacitor discharge stud welding machine also claims the capacitor-discharge stud welding machine, is a branch of stud welding machine.Be characterized in that welding only needs 1-3ms, weld interval is short, heat affecting is little, weldquality is good, production efficiency is high, be mainly used in diameter and be less than or equal to the stud welding of the materials such as carbon steel, stainless steel and aluminum bronze of 12mm, be widely used in industries such as shipbuilding, industrial furnace, automobile, control panel, communication apparatus, household electrical appliance, kitchen utensils.
The capacitor discharge stud welding machine is made up of charge power supply, capacitor group, controller, welding gun, welding cable, ground connection pincers etc.Wherein, the function of charge power supply mainly is that capacitor is charged, and its performance quality has determined the quality of capacitor discharge stud welding machine.The main circuit of traditional capacitor discharge stud welding machine as shown in Figure 1, its operation principle is as follows: exchange 220v voltage after transformer T step-down, input rectifying bridge V
1, carry out full-wave rectification, at charging IGCT V
2When opening,, when charging voltage reaches setting value, turn-off V to capacitor C charging
2, open discharge IGCT V
3, the energy of storing among the capacitor C discharges, and by welding cable, welding gun, ground connection pincers, on workpiece, wherein SA is work or the change-over switch that stops usefulness with stud welding.
Capacitor C is the capacitor group of a parallel connection, and its capacitance is very big, is 0.126-0.165F, decides on Weldability.Capacitance is big more, and charging voltage is high more, and the energy of storage is also just many more, just can weld thicker double-screw bolt.In capacitor when beginning charging, the internal resistance of capacitor is almost nil, so in the moment of charging beginning, charging current can reach amperes up to a hundred, even higher, this is relevant with charging voltage, then along with the voltage increase at capacitor two ends and sharply reduce.Excessive charging current will make the capacitor heating and damage, even can blast, and cause security incident.In order to reduce charging current, must in charge circuit, seal in current-limiting resistance, as R among Fig. 1
1Electric current is limited in about 10A, and current-limiting resistance not only consumes lot of energy, accounts for 50% of charge power supply power output, power attenuation is bigger, serious waste energy, also can influence charging rate, and come out with the form of heat energy, electronic devices and components temperature in the welding machine is raise, accelerated the aging speed of electronic devices and components, reduced the reliability of welding machine, also made the volume of welding machine become big and seem heavy simultaneously.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existing stud welding machine exists, and a kind of capacitor discharge stud welding machine is provided.The utility model adopts the Switching Power Supply with constant-current characteristics to replace capacitor charging power in the common welding machine, has not only cancelled current-limiting resistance, has shortened the charging interval, has improved efficient, and has reduced the volume and weight of welding machine.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of capacitor discharge stud welding machine comprises welding circuit, it is characterized in that: comprise that also input is connected with AC power, the switching power circuit that output is connected with welding circuit; Described switching power circuit comprises the rectifier V that is connected with AC power
1, with rectifier V
1The inverter circuit that connects, the rectifier V that is connected with inverter circuit
2, with rectifier V
2The wave filter L that is connected with welding circuit
C
Described inverter circuit comprises and rectifier V
1The switching power tube VT that connects
1And VT
2, through pulse transformer T
1With switching power tube VT
1And VT
2Connect the commutating capacitor C be used for the control chip of gauge tap power tube break-make, be connected with VT2 with switching power tube VT1 respectively
1And C
2, with commutating capacitor C
1And C
2The intermediate-frequency transformer T that connects
2
Described welding circuit comprises and wave filter L
CThe capacitor group C that output connects, discharge IGCT V
3, with capacitor group C and discharge IGCT V
3The welding gun and the workpiece that connect.
Described switching power tube VT
1And VT
2Be igbt.
Operation principle of the present utility model is: alternating current 220V is through rectifier V
1After the full-wave rectification, as the dc source of inverter, inverter is transformed into the 25kHz ac square wave with direct current, through transformer T
2After the transformation, again by rectifier V
2Rectification, wave filter L
CAfter the filtering, output dc voltage, C carries out constant-current charge to the capacitor group, after charging finishes, opens discharge IGCT V
3, with stud welding on workpiece.After the signal that is sent by control chip amplifies, from the input of AB end, through pulse transformer T1 input, gauge tap power tube VT
1, VT
2Break-make.When the detected curtage signal of single-chip microcomputer surpassed setting value, single-chip microcomputer sent instruction and gives control chip, stopcock power tube VT
1, VT
2, Switching Power Supply stops to charge to capacitor.
Advantage of the present utility model is:
One, adopts Switching Power Supply to replace capacitor charging power in the common welding machine, cancelled current-limiting resistance, more than every energy-conservation 500W of welding machine, not only saved the energy, also greatly reduce the internal temperature of welding machine, improved the reliability of welding machine with constant-current characteristics.
Two, owing to adopted Switching Power Supply, reduce the volume and weight of welding machine, in practical operation, increased the flexibility of welding machine.
Three, adopt constant current control, charging rate is accelerated, and the charging interval has shortened 20%-30%, has improved welding efficiency.
Four, adopt constant current control, can not burn capacitor group, handling safety because of the excessive heating of electric current.
Five, adopt Single-chip Controlling, simplified circuit, improved the serviceability of welding machine.
Description of drawings
Fig. 1 is the utility model circuit theory schematic diagram
Fig. 2 is the electrical schematic diagram of the utility model Switching Power Supply
Fig. 3 is the circuit theory diagrams that common welding machine adopts current-limiting resistance
Be labeled as among the figure: 1, welding gun, 2, workpiece.
The specific embodiment
A kind of capacitor discharge stud welding machine comprises welding circuit, comprises that also input is connected with AC power, the switching power circuit that output is connected with welding circuit; Described switching power circuit comprises the rectifier V that is connected with AC power
1, with rectifier V
1The inverter circuit that connects, the rectifier V that is connected with inverter circuit
2, with rectifier V
2The wave filter L that is connected with welding circuit
C
Wherein, described inverter circuit comprises and rectifier V
1The switching power tube VT that connects
1And VT
2, through pulse transformer T
1With switching power tube VT
1And VT
2Connect be used for the control chip of gauge tap power tube break-make, respectively with switching power tube VT
1And VT
2The commutating capacitor C that connects
1And C
2, with commutating capacitor C
1And C
2The intermediate-frequency transformer T that connects
2Described welding circuit comprises and wave filter L
CCapacitor group C that output connects and discharge IGCT V
3, with capacitor group C and discharge IGCT V
3The welding gun 1 and the workpiece 2 that connect.Described commutating capacitor C
1And C
2With intermediate-frequency transformer T
2Between be connected with and will compare with the charging current value of setting through the detected current signal of current transformer CT input single-chip microcomputer.Between welding circuit,, compare with the magnitude of voltage of setting with detected voltage signal input single-chip microcomputer.Switching power tube VT
1And VT
2Select igbt for use.
In the utility model, Switching Power Supply is to work under the situation of fixed frequency, fixed pulse width.The CD end through the detected current signal input of current transformer CT single-chip microcomputer, is compared with the charging current value 8-12A that sets, and when surpassing setting value, single-chip microcomputer sends instruction, stopcock power tube VT
1And VT
2, switching power circuit then stops to the capacitor charging, and when treating that electric current drops to the current value of setting, control chip is opened power tube VT
1And VT
1, Switching Power Supply continues the charging to capacitor group C again, circulation repeatedly, and Switching Power Supply is constantly charged to capacitor group C with the DC voltage pulse continuously.Rising along with capacitor group C two ends charging voltage, charging current sharply descends, when charging current was less than or equal to the charging current of setting, Switching Power Supply was just pressed constantly to capacitor group C charging, until the charging voltage value ability complete charge process that reaches setting with galvanic current.Switching Power Supply has the function of overvoltage protection equally.With EF end is that the magnitude of voltage of the detected charging voltage signal in capacitor two ends and setting compares, and when being lower than when setting value, Switching Power Supply works on, when being greater than or equal to setting value, then the stopcock power supply stops to guarantee the welding machine safe operation to the capacitor charging.
Operation principle of the present utility model is: alternating current 220V is through rectifier V
1After the full-wave rectification, as the dc source of inverter, inverter is transformed into the 25kHz ac square wave with direct current, through transformer T
2After the transformation, again by rectifier V
2Rectification, wave filter L
CAfter the filtering, output dc voltage, C carries out constant-current charge to the capacitor group, after charging finishes, opens discharge IGCT V
3, with stud welding on workpiece 2.After the signal that is sent by control chip amplifies, from the input of AB end, through pulse transformer T
1Input, gauge tap power tube VT
1, VT
2Break-make, when the detected curtage signal of single-chip microcomputer surpassed setting value, single-chip microcomputer sent instruction and gives control chip, stopcock power tube VT
1, VT
2
The Switching Power Supply that employing has a constant-current characteristics replaces the capacitor charging power in the common welding machine, has cancelled current-limiting resistance, more than every energy-conservation 500W of welding machine, has not only saved the energy, also greatly reduces the internal temperature of welding machine, has improved the reliability of welding machine; Owing to adopted Switching Power Supply, reduced the volume and weight of welding machine, in practical operation, increased the flexibility of welding machine; Employing constant current control, charging rate is accelerated, and the charging interval has shortened 20%-30%, has improved welding efficiency; Employing constant current control can not damage capacitor group, handling safety because of the excessive heating of electric current; Adopt Single-chip Controlling, simplified circuit, improved the serviceability of welding machine.
Obviously; those of ordinary skill in the art is according to technological know-how of being grasped and customary means; according to above said content, can also make the various ways that does not break away from the utility model basic technical scheme, these pro forma conversion are all within protection domain of the present utility model.
Claims (4)
1. a capacitor discharge stud welding machine comprises welding circuit, it is characterized in that: comprise that also input is connected with AC power, the switching power circuit that output is connected with welding circuit; Described switching power circuit comprises the rectifier V that is connected with AC power
1, with rectifier V
1The inverter circuit that connects, the rectifier V that is connected with inverter circuit
2, with rectifier V
2The wave filter L that is connected with welding circuit
C
2. capacitor discharge stud welding machine according to claim 1 is characterized in that: described inverter circuit comprises and rectifier V
1The switching power tube VT that connects
1And VT
2, through pulse transformer T
1With switching power tube VT
1And VT
2Connect be used for the control chip of gauge tap power tube break-make, respectively with switching power tube VT
1And VT
2The commutating capacitor C that connects
1And C
2, with commutating capacitor C
1And C
2The intermediate-frequency transformer T that connects
2
3. capacitor discharge stud welding machine according to claim 1 and 2 is characterized in that: described welding circuit comprises and wave filter L
CThe capacitor group C that output connects, discharge IGCT V
3, with capacitor group C and discharge IGCT V
3The welding gun (1) and the workpiece (2) that connect.
4. capacitor discharge stud welding machine according to claim 2 is characterized in that: described switching power tube VT
1And VT
2Be igbt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720079362XU CN201109004Y (en) | 2007-04-27 | 2007-04-27 | Capacitor discharging stud welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720079362XU CN201109004Y (en) | 2007-04-27 | 2007-04-27 | Capacitor discharging stud welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201109004Y true CN201109004Y (en) | 2008-09-03 |
Family
ID=39893522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720079362XU Expired - Lifetime CN201109004Y (en) | 2007-04-27 | 2007-04-27 | Capacitor discharging stud welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201109004Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774072A (en) * | 2010-03-09 | 2010-07-14 | 江门市保值久机电有限公司 | Power supply unit for stud welding machine |
| CN102615388A (en) * | 2012-04-09 | 2012-08-01 | 陈寄炎 | Energy-saving and portable capacitor discharge welder |
| CN101462197B (en) * | 2008-10-22 | 2013-03-06 | 深圳市鸿栢科技实业有限公司 | High-frequency inversion stud welding equipment and controlling means thereof |
| CN106270892A (en) * | 2015-06-03 | 2017-01-04 | 徐州市嘉迪汽车电器有限公司 | A kind of fusing soldering welder of motor copper conductor |
| CN111230258A (en) * | 2020-03-02 | 2020-06-05 | 广州市精源电子设备有限公司 | Inverter type arc welding power supply, arc welding control method and arc spot welding method |
-
2007
- 2007-04-27 CN CNU200720079362XU patent/CN201109004Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462197B (en) * | 2008-10-22 | 2013-03-06 | 深圳市鸿栢科技实业有限公司 | High-frequency inversion stud welding equipment and controlling means thereof |
| CN101774072A (en) * | 2010-03-09 | 2010-07-14 | 江门市保值久机电有限公司 | Power supply unit for stud welding machine |
| CN102615388A (en) * | 2012-04-09 | 2012-08-01 | 陈寄炎 | Energy-saving and portable capacitor discharge welder |
| CN106270892A (en) * | 2015-06-03 | 2017-01-04 | 徐州市嘉迪汽车电器有限公司 | A kind of fusing soldering welder of motor copper conductor |
| CN111230258A (en) * | 2020-03-02 | 2020-06-05 | 广州市精源电子设备有限公司 | Inverter type arc welding power supply, arc welding control method and arc spot welding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080903 |