CN103252569B - Portable minisize reserve energy spot welding machine - Google Patents
Portable minisize reserve energy spot welding machine Download PDFInfo
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- CN103252569B CN103252569B CN201310201248.XA CN201310201248A CN103252569B CN 103252569 B CN103252569 B CN 103252569B CN 201310201248 A CN201310201248 A CN 201310201248A CN 103252569 B CN103252569 B CN 103252569B
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Abstract
Portable minisize reserve energy spot welding machine provided by the invention, comprise the Ni-MH battery group (1) of being furnished with charger, spot welding control circuit module (2), energy storage charge switch (3), farad level storage capacitor (4), spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch, the earth clip (7) being connected with welding machine by cable and energy adjustment and display floater (8), wherein, (1) and (2) and (3) interconnect, (2) be also connected with (5)-(8), (3) be connected with (4), (4) with (2), (3), (5) be connected with (8), (5) be connected with (6), (6) be connected with (8), (7) be connected with (8). portable minisize reserve energy spot welding machine of the present invention, slim for welding/ultrathin steel plate or exquisite microminiature parts design, and can be used for the problem of the on-the-spot Fast Installation that solves some sensors.
Description
Technical field
The present invention relates to Electromechanical Control technical field, especially relate to a kind of portable minisize energy storage spot weldingMachine.
Background technology
Spot welding connection is a kind of annexation conventional between metal current material and metal material, commonSpot welding operation all welds by mash welder.
Current in the heavy construction installation security monitoring systems such as railway, bridge and electric power, the peace of sensorDress is the key technology of obtaining monitor signal. For example strain gauge, current divider type current sensor are generally adoptedFix with bonding, riveted joint or bolt, complicated construction technique, sometimes also can measured point be produced and be damaged etc.And erection unit is not easy to carry, limit the popularization in some fields.
Known spot-welding technology, is while utilizing large electric current by workpiece crimping point, the instantaneous heating of contact resistanceThe general principle of added metal, makes spot-welding technology have advantages of at some production fields unique. But oneAs industrial sites welding machine be to adopt ac power supply, obtain low by step-down transformer or electronic inverterPress high-current supply, also some percussion welder also will heat solder joint through secondary iron core return circuit coupling energy.Not Portable belt of the low equipment heaviness of power consumption efficiency. Enable to weld frivolous parts, electric current regulates also essence notStandard, is difficult to competent as the portable hand-held spot welding working condition requirement of above-mentioned installation of sensors one class.
Therefore, instantly need the urgent technical problem solving to be exactly: how can propose one hasThe measure of effect, has solved problems of the prior art.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of portable minisize reserve energy spot welding machine, is welderingConnect slim/ultrathin steel plate or exquisite microminiature parts and design, and can be used for solving some sensorsThe problem of on-the-spot Fast Installation.
In order to address the above problem, the invention discloses a kind of portable minisize reserve energy spot welding machine, compriseBe furnished with charger Ni-MH battery group (1), spot welding control circuit module (2), energy storage charge switch (3),Farad level storage capacitor (4), spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch,The earth clip (7) being connected with welding machine by cable and energy adjustment and display floater (8), wherein, instituteState the Ni-MH battery group (1) and spot welding control circuit module (2) and energy storage charge switch of being furnished with charger(3) connect spot welding control circuit module (2) and Ni-MH battery group (1), the energy storage of being furnished with chargerCharge switch (3), spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch, pass throughThe earth clip (7) that cable is connected with welding machine and energy adjustment are connected with display floater (8), energy storage chargingSwitch (3) and Ni-MH battery group (1), spot welding control circuit module (2) and the farad of being furnished with chargerLevel storage capacitor (4) connects, farad level storage capacitor (4) and spot welding control circuit module (2), storageCan be connected by charge switch (3) spot welding discharge switch (5) and spot welding control with spot welding discharge switch (5)Circuit module processed (2), farad level storage capacitor (4) and the spot-welding gun (6) with hand control switchConnect, with the spot-welding gun (6) of hand control switch and spot welding discharge switch (5) and energy adjustment andDisplay floater (8) connects, the earth clip (7) and energy adjustment and the demonstration that are connected with welding machine by cablePanel (8) connects.
Further, described portable minisize reserve energy spot welding machine also comprises the satchel formula engineering plastic of waterproofMaterial seal box (9), for by described Ni-MH battery group (1), the spot welding control circuit of being furnished with chargerModule (2), energy storage charge switch (3), farad level storage capacitor (4), spot welding discharge switch (5),With the spot-welding gun (6) of hand control switch, earth clip (7) and the energy being connected with welding machine by cableAmount regulates with display floater (8) and fills in the inner.
Further, described portable minisize reserve energy spot welding machine also comprises solar charger (10),Described solar charger (10) and Ni-MH battery group (1), energy adjustment and the demonstration of being furnished with chargerThe satchel formula engineering plastics seal boxs (9) of panel (8) and waterproof are connected.
Further, described spot welding control circuit module (2) comprises cell voltage is converted to moduleThe mu balanced circuit (2a) of power supply, automatically regulate the charging control circuit of charging current according to charging voltage(2b), by comparison reference voltage automatically stop charging energy settings circuit (2c), pass through buttonTrigger spot welding charge/discharge control circuit (2d) and discharge and recharge working state indicating circuit (2e).
Further, described energy storage charge switch (3) and spot welding discharge switch (5), by with logicalThe disconnected automotive grade FET electronic switch of controlling forms, the control input end of energy storage charge switch (3) with fillThe output of electric control circuit (2b) is connected; Control input end and the spot welding of spot welding discharge switch (5)The output of charge/discharge control circuit (2d) connects.
Further, described energy adjustment and display floater (8) comprise transfer switch (8a),Energy adjustment knob (8b), the digital demonstration of energy storage (8c), battery charging socket (8d), spot welding are touchedSignalling socket (8e), working station indicator (8f) and be connected the High-current output terminal (8g) of welding gun,Wherein, transfer switch (8a) is connected with the Ni-MH battery group (1) of being furnished with charger, and energy is adjustedJoint knob (8b) is connected with spot welding control circuit module (2), and energy storage is digital to be shown (8c) and be furnished withThe Ni-MH battery group (1) of charger is connected with farad level storage capacitor (4), battery charging socket (8d)Be connected spot welding triggering signal socket (8e) and spot welding control with the Ni-MH battery group (1) of being furnished with chargerCircuit module processed (2) is connected with the spot-welding gun (6) with hand control switch, working station indicator(8f) be connected with spot welding control circuit module (2), connect the High-current output terminal (8g) of welding gunWith spot welding control circuit module (2), with the spot-welding gun (6) of hand control switch and by cable withThe connected earth clip (7) of welding machine is connected.
Further, the described spot-welding gun with hand control switch (6) comprises with lock screwSpot-welding gun head (6a), mounting points arc welding gun head tie point welding cable plastics pistol handle (6b) andBe connected to the welding trigger switch (6c) that mash welder panel triggers socket, enter after weld preparation state,Pull trigger button and can implement spot welding.
To sum up this programme directly adopts capacitance energy storage control, has simplified circuit structure, is meeting sensorWhen fixed support welding energy requires, improve capacity usage ratio, reduced supply voltage,Reduce volume, weight and product cost, safe and reliable, for one side thin plate spot-welding technology,Particularly welded part easy accessibility, can not exert an influence to working face. Experimental results show that the present invention is realShowed desired design function and reached application purpose, pacify fast at the scene that can be used for solving sensorThe problem of dress, becomes the utility device that is applicable to field condition construction.
Brief description of the drawings
Fig. 1 is the structural representation of portable minisize reserve energy spot welding machine of the present invention;
Fig. 2 is portable minisize reserve energy spot welding machine circuit structure theory diagram of the present invention;
Fig. 3 is portable minisize reserve energy spot welding machine guidance panel figure of the present invention;
Fig. 4 is portable minisize reserve energy spot welding machine typical case application schematic diagram of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with attachedFigure is described in further detail the present invention with example. But example is not as to limit of the present inventionFixed.
Be illustrated in figure 1 the structural representation of portable minisize reserve energy spot welding machine of the present invention, specifically bagDraw together be furnished with charger Ni-MH battery group (1), spot welding control circuit module (2), energy storage charge switch (3),Farad level storage capacitor (4), spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch,The earth clip (7) being connected with welding machine by cable and energy adjustment and display floater (8), wherein, instituteState the Ni-MH battery group (1) and spot welding control circuit module (2) and energy storage charge switch of being furnished with charger(3) connect spot welding control circuit module (2) and Ni-MH battery group (1), the energy storage of being furnished with chargerCharge switch (3), spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch, pass throughThe earth clip (7) that cable is connected with welding machine and energy adjustment are connected with display floater (8), energy storage chargingSwitch (3) and Ni-MH battery group (1), spot welding control circuit module (2) and the farad of being furnished with chargerLevel storage capacitor (4) connects, farad level storage capacitor (4) and spot welding control circuit module (2), storageCan be connected by charge switch (3) spot welding discharge switch (5) and spot welding control with spot welding discharge switch (5)Circuit module processed (2), farad level storage capacitor (4) and the spot-welding gun (6) with hand control switchConnect, with the spot-welding gun (6) of hand control switch and spot welding discharge switch (5) and energy adjustment andDisplay floater (8) connects, the earth clip (7) and energy adjustment and the demonstration that are connected with welding machine by cablePanel (8) connects.
Preferably, described portable minisize reserve energy spot welding machine, also comprises the satchel formula engineering plastics of waterproofSeal box (9), for by described the Ni-MH battery group (1) of being furnished with charger, spot welding control circuit mouldPiece (2), energy storage charge switch (3), farad level storage capacitor (4), spot welding discharge switch (5), bandThere are the spot-welding gun (6) of hand control switch, earth clip (7) and the energy being connected with welding machine by cableRegulate with display floater (8) and fill in the inner.
Preferably, described portable minisize reserve energy spot welding machine, also comprises solar charger (10),Described solar charger (10) and Ni-MH battery group (1), energy adjustment and the demonstration of being furnished with chargerThe satchel formula engineering plastics seal boxs (9) of panel (8) and waterproof are connected.
Preferably, described spot welding control circuit module (2) comprises cell voltage is converted to module electricityThe mu balanced circuit (2a) in source, automatically regulate the charging control circuit of charging current according to charging voltage(2b), by comparison reference voltage automatically stop charging energy settings circuit (2c), pass through buttonTrigger spot welding charge/discharge control circuit (2d) and discharge and recharge working state indicating circuit (2e).
Preferably, described energy storage charge switch (3) and spot welding discharge switch (5), by with break-makeThe automotive grade FET electronic switch of controlling forms, control input end and the charging of energy storage charge switch (3)The output of control circuit (2b) is connected; Control input end and the spot welding of spot welding discharge switch (5) are putThe output of electric control circuit (2d) connects.
Preferably, described energy adjustment and display floater (8) comprise transfer switch (8a), energyAmount adjusting knob (8b), the digital demonstration of energy storage (8c), battery charging socket (8d), spot welding triggerSignal socket (8e), working station indicator (8f) and be connected the High-current output terminal (8g) of welding gun,Wherein, transfer switch (8a) is connected with the Ni-MH battery group (1) of being furnished with charger, and energy is adjustedJoint knob (8b) is connected with spot welding control circuit module (2), and energy storage is digital to be shown (8c) and be furnished withThe Ni-MH battery group (1) of charger is connected with farad level storage capacitor (4), battery charging socket (8d)Be connected spot welding triggering signal socket (8e) and spot welding control with the Ni-MH battery group (1) of being furnished with chargerCircuit module processed (2) is connected with the spot-welding gun (6) with hand control switch, working station indicator(8f) be connected with spot welding control circuit module (2), connect the High-current output terminal (8g) of welding gunWith spot welding control circuit module (2), with the spot-welding gun (6) of hand control switch and by cable withThe connected earth clip (7) of welding machine is connected.
Preferably, the described spot-welding gun with hand control switch (6) comprises with lock screwThe plastics pistol handle (6b) of spot-welding gun head (6a), mounting points arc welding gun head tie point welding cable and companyReceive the welding trigger switch (6c) that mash welder panel triggers socket, enter after weld preparation state, pullMoving trigger button can be implemented spot welding.
Be illustrated in figure 2 portable minisize reserve energy spot welding machine circuit structure theory diagram, portable decliningType reserve energy spot welding machine is by the power supply being connected in series successively (1), control circuit module (2), energy storageCharge switch (3), storage capacitor (4), spot welding discharge switch (5), trigger and open with spot weldingThe welding gun (6) closing and the earth clip (7) being connected with welding machine by cable composition. And control module(2) each port is connected with above-mentioned parts realizes spot welding control function.
Utilize energy adjustment knob (8b) regulator potentiometer dividing potential drop to set after reference voltage, energy storage controlThe internal comparator of module starts to detect the charging voltage of storage capacitor. When charging voltage reaches settingBenchmark time, comparator output control signal stops charging automatically. In charging and discharging process,Control module can produce pwm pulse and be added to charge and discharge switch control end, and what automatically regulate discharges and rechargesSpeed.
Be illustrated in figure 3 portable minisize reserve energy spot welding machine guidance panel figure, described portable decliningType reserve energy spot welding machine energy adjustment and display floater (8), be equipped with above transfer switch (8a),Energy adjustment knob (8b), energy storage show that (8c), battery charging socket (8d), welding triggerSocket (8e), working station indicator (8f) and output wiring terminal (8g). Control circuit mouldPiece (2) is realized energy adjustment by connector and is connected with the signal of display floater (8). Work turnsChange the switching of switch (8a), can make whole mash welder respectively in spot welding, shutoff and charging shapeState.
In embodiment, shell is satchel formula engineering plastics seal boxs (9) as shown in Figure 4. Need to makeUsed time, open the case lid of (9), earthing clamp in welded bottom workpieces, rotary switch (8a)To " spot welding " position, adjusting energy (8b) makes (8c) show required voltage, indicator lamp (8f)Show after " ready ", arc welding gun head (6a) is pressed in to the bond pad locations of welded thin slice, cocking(6c) complete a spot welding.
More than that the present invention is able to practical key technology place.
The key technical indexes:
Welding energy adjustable range: 10J-60J
Maximum output: 100J
Throat thickness: 0.05-0.3 (mm)
Enclosure volume: 285 × 213 × 155 (mm)3
Complete machine weight: 3.5Kg
Operating voltage: direct current 24V
Spot welding number of times after charging: > 3000
Further illustrate, the technical requirement that the present invention proposes this welding machine is:
1. machine structure design is upper wants compact, firm, is easy to carry, and meets outdoor environment instructions for use.
2. consider emphatically low consumption, high efficiency circuit design, ensure that the battery carrying can be excessive not overweight.
3. spot welding discharge switch loop response speed is fast, loss is little, can produce instantaneous high-power output.
4. operating voltage must be lower than 36V, guarantees user of service's safety.
According to above engineering application requirements, the present invention has solved following problem in realization:
1. for guaranteeing safe voltage, described power supply directly uses the battery pack lower than 36V. For exampleSelect 24V/4Ah Ni-MH battery, the energy storing in battery is: 24V × 4A × 3600s=345600J,Even according to 50% spot welding efficiency, average every some power consumption 50J, can weld (345600 after the each charging of battery× 50%)/50=3456 point. Can meet the instructions for use of on-the-spot spot welding 1000 times.
2. the low-voltage energy-storage capacitor (4) described in, in order to make each electric discharge reach welding energy requirement,The storage capacitor amount of selecting and operating voltage are by capacitance energy storage formula W=C × V2/ 2 estimations, can meetDesigning requirement.
3. described in, can pass through the contactless discharge switch (5) of the above transient high-current of KA, due to welderingMachine operating voltage is very low, selects the special switch circuit module of the FET of high-power low-voltage, and internal resistance is only2m Ω, the in parallel use of several devices reaches technical requirement completely.
4. the safe and reliable charging and discharging control module described in adopts special control chip, can be according to chargingVoltage automatically produces pwm signal and regulates charging current, has solved the contradiction in charge efficiency and charging interval.And rational circuit layout, having avoided can be not disturbed in the time of heavy-current discharge.
5. the mash welder described in uses 24 volts of standard type nickel-hydrogen accumulator power supplies, when the external interchange of change-over switchOr when solar charger, internal battery can automatic charging.
The present invention adopts farad level electric capacity as spot welding accumulation power supply according to above technical requirement, mixes adaptiveAnswer quick charge and low-voltage, high-current discharge circuit, realized above special spot welding function. By weldingTheory and engineering experience known, the energy of the instantaneous welding of solder joint according to workpiece thickness need to be 20～100J(joule) adjustable, and to, within the time of millisecond, there is enough energy densities, temperature rise isCan reach weldment fusing point.
Small product size of the present invention is little lightweight, and A-battery power supply is safe and reliable, can be withBody carries for field condition, is slim for welding/ultrathin steel plate or exquisite microminiature parts speciallyA kind of seriation novel electromechanical product of design, practicality shows that product of the present invention can be used for solving some biographiesThe problem of the on-the-spot Fast Installation of sensor.
Above portable minisize reserve energy spot welding machine provided by the present invention and using method thereof are carried out in detailThin introduction, has applied specific case herein principle of the present invention and embodiment has been explainedState, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof;Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, in specific embodiment partyIn formula and range of application, all will change, in sum, this description should not be construed asLimitation of the present invention.
Claims (6)
1. a portable minisize reserve energy spot welding machine, comprise be furnished with charger Ni-MH battery group (1),Spot welding control circuit module (2), energy storage charge switch (3), farad level storage capacitor (4), spot welding are putElectric switch (5), with the spot-welding gun (6) of hand control switch, the ground connection being connected with welding machine by cableFolder (7) and energy adjustment and display floater (8), wherein, described in be furnished with charger Ni-MH battery group(1) be connected spot welding control circuit with spot welding control circuit module (2) and energy storage charge switch (3)Module (2) and Ni-MH battery group (1), energy storage charge switch (3), the spot welding electric discharge of being furnished with chargerSwitch (5), with the spot-welding gun (6) of hand control switch, the earth clip being connected with welding machine by cable(7) be connected with display floater (8) with energy adjustment, energy storage charge switch (3) be furnished with chargerNi-MH battery group (1), spot welding control circuit module (2) and a farad level storage capacitor (4) be connected,Farad level storage capacitor (4) and spot welding control circuit module (2), energy storage charge switch (3) and spot weldingDischarge switch (5) connects, spot welding discharge switch (5) and spot welding control circuit module (2), farad levelStorage capacitor (4) is connected with the spot-welding gun (6) with hand control switch, with hand control switchSpot-welding gun (6) be connected with display floater (8) with spot welding discharge switch (5) and energy adjustment, logicalCross the cable earth clip connected with welding machine (7) and energy adjustment and be connected with display floater (8), also compriseThe satchel formula engineering plastics seal boxs (9) of waterproof, for by the described Ni-MH battery group of being furnished with charger(1), spot welding control circuit module (2), energy storage charge switch (3), farad level storage capacitor (4),Spot welding discharge switch (5), with the spot-welding gun (6) of hand control switch, be connected with welding machine by cableEarth clip (7) and energy adjustment and display floater (8) fill in the inner.
2. portable minisize reserve energy spot welding machine as claimed in claim 1, is characterized in that, also comprisesSolar charger (10), described solar charger (10) and the Ni-MH battery group of being furnished with charger(1), energy adjustment is connected with the satchel formula engineering plastics seal boxs (9) of display floater (8) and waterproof.
3. portable minisize reserve energy spot welding machine as claimed in claim 1, is characterized in that, describedSpot welding control circuit module (2) comprise by cell voltage be converted to modular power source mu balanced circuit (2a),According to charging voltage automatically regulate charging current charging control circuit (2b), pass through comparison reference voltageAutomatically stop the energy settings circuit (2c) of charging, the spot welding charge/discharge control circuit triggering by button(2d) and discharge and recharge working state indicating circuit (2e).
4. portable minisize reserve energy spot welding machine as claimed in claim 3, is characterized in that, describedEnergy storage charge switch (3) and spot welding discharge switch (5), by the automotive grade FET with break-make controlElectronic switch forms, the control input end of energy storage charge switch (3) and charging control circuit (2b)Output is connected; The control input end of spot welding discharge switch (5) and spot welding charge/discharge control circuit (2d)Output connect.
5. portable minisize reserve energy spot welding machine as claimed in claim 3, is characterized in that, described energyAmount regulate with display floater (8) comprise transfer switch (8a), energy adjustment knob (8b),Digital (8c), battery charging socket (8d), spot welding triggering signal socket (8e), the work of showing of energy storageMake status indicator lamp (8f) and the High-current output terminal (8g) that is connected welding gun, wherein, power supply conversionSwitch (8a) is connected with the Ni-MH battery group (1) of being furnished with charger, energy adjustment knob (8b) withSpot welding control circuit module (2) connects, digital (8c) and the ni-mh electricity of being furnished with charger of showing of energy storagePond group (1) is connected with a farad level storage capacitor (4), battery charging socket (8d) and be furnished with chargerNi-MH battery group (1) connect, spot welding triggering signal socket (8e) and spot welding control circuit module (2)Be connected working station indicator (8f) and spot welding control with the spot-welding gun (6) with hand control switchCircuit module processed (2) connects, and connects the High-current output terminal (8g) and spot welding control circuit of welding gunModule (2), with spot-welding gun (6) and the ground connection being connected with welding machine by cable of hand control switchFolder (7) is connected.
6. portable minisize reserve energy spot welding machine as claimed in claim 3, is characterized in that, describedComprise spot-welding gun head (6a), the installation with lock screw with the spot-welding gun (6) of hand control switchThe plastics pistol handle (6b) of spot-welding gun head tie point welding cable and be connected to mash welder panel trigger insertThe welding trigger switch (6c) of mouth, enters after weld preparation state, pulls trigger button and can implement a littleWeldering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310201248.XA CN103252569B (en) | 2013-05-27 | 2013-05-27 | Portable minisize reserve energy spot welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310201248.XA CN103252569B (en) | 2013-05-27 | 2013-05-27 | Portable minisize reserve energy spot welding machine |
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| CN103252569A CN103252569A (en) | 2013-08-21 |
| CN103252569B true CN103252569B (en) | 2016-05-18 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106425028B (en) * | 2016-07-13 | 2019-01-22 | 苏州新逸喆电子科技有限公司 | A kind of wireless bonding machine with heat generating component |
| CN106077897A (en) * | 2016-07-13 | 2016-11-09 | 苏州新逸喆电子科技有限公司 | A kind of portable mobile wireless electric welding machine |
| CN107052542B (en) * | 2016-11-28 | 2019-10-29 | 徐海恩 | A kind of novel portable energy conservation welder |
| CN107470746A (en) * | 2017-09-25 | 2017-12-15 | 陈炳周 | Low current input, the energy storage of High-current output release condenser discharge welder |
| CN108155688B (en) * | 2017-12-26 | 2021-04-20 | 中国航发四川燃气涡轮研究院 | Portable spot welding device with double power supplies |
| CN111168217B (en) * | 2020-01-20 | 2021-04-20 | 北京工业大学 | Pulse type lossless energy storage resistance welding machine with intelligent control function |
| CN111230268B (en) * | 2020-01-20 | 2022-05-31 | 北京工业大学 | Hand-held wireless remote control electric welding gun capable of automatically sensing and taking electricity |
| IT202000015286A1 (en) * | 2020-06-25 | 2021-12-25 | Prima Srl | ELECTRIC RESISTANCE WELDER |
| CN114178654B (en) * | 2021-12-23 | 2023-07-04 | 中国核动力研究设计院 | Welding circuit and portable adjustable impact welding machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2523545Y (en) * | 2001-11-27 | 2002-12-04 | 白津生 | All weather solar energy storing screw column multifunctional welder |
| CN201201102Y (en) * | 2007-05-08 | 2009-03-04 | 布莱克和戴克公司 | Wireless welding machine |
| CN201161330Y (en) * | 2008-01-09 | 2008-12-10 | 东莞市特龙金科能源科技有限公司 | Impulse current spot welder |
| CN201913403U (en) * | 2010-12-21 | 2011-08-03 | 北京工业大学 | Desk-top lightweight digital display and energy storage dual-purpose machine for spot soldering and tin soldering |
| CN102205455B (en) * | 2011-05-16 | 2014-07-16 | 王军翔 | Portable rechargeable direct-current electric welding machine |
| CN102896443A (en) * | 2011-07-27 | 2013-01-30 | 河南科隆集团有限公司 | Portable smalls-sized energy-storage electric welder |
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