CN102896402B - AC welder - Google Patents
AC welder Download PDFInfo
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- CN102896402B CN102896402B CN201110215275.3A CN201110215275A CN102896402B CN 102896402 B CN102896402 B CN 102896402B CN 201110215275 A CN201110215275 A CN 201110215275A CN 102896402 B CN102896402 B CN 102896402B
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- welder
- transformer
- contactor
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- closed contact
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Abstract
The invention discloses an AC welder which comprises a switch, a first fuse, a second fuse, a welder transformer, a transformer, an AC contactor, a time relay, a sensitive relay and a resistor. By the aid of an additional no-load automatic stop protection circuit, the AC welder can operate normally when a welding electrode contacts with a workpiece to power the AC contactor, and can stop operating when the welding electrode does not contact with the workpiece to fail the AC contactor. Therefore, no-load automatic stop of the AC welder is achieved, electric shock can be prevented, no-load loss can also be reduced greatly, and safety and energy conservation of the AC welder are improved.
Description
Technical field
The present invention relates to A.C. welder technology, particularly a kind of A.C. welder with no-load automatic stop holding circuit.
Background technology
As everyone knows, A.C. welder is the electric energy of alternating current to be converted to the welding machine of welding energy, its circuit control principle as shown in Figure 1, comprise switch 1, fuse 2,3, welder transformer 4, welding rod 5 and workpiece 6, wherein, switch 1 is respectively by the mains side binding post 4 of fuse 2,3 and welder transformer 4
1, 4
2connect the output end binding post 4 of welder transformer 4
3connection workpiece 6 therewith ground connection, output end binding post 4
4be connected with welding rod 5.After switch 1 closure, output end binding post 4
3, 4
4between with weldingvoltage, thereby make the charged work of welding rod 5.This A.C. welder advantages such as weld seam is solid because volume is small and exquisite, simple to operate, easy to use, after speed and welding are widely used in every field.
Although this A.C. welder has above-mentioned various advantage, it still has following shortcoming:
1, the operating frequency of A.C. welder and operating voltage are respectively 50Hz, 380V conventionally, and if the alternating current of 40Hz-60Hz by human body brain or heart, very big to people's injury.In weld job process, conventionally need the frequent welding rod of changing, if now welding rod is charged, be easy to because operation is lack of standardization or protect the improper electric shock accidents that causes.In addition,, if A.C. welder continuous firing, its internal circuit and wherein each kind of component easily break down or make moist and make A.C. welder outer casing electrification, thereby also easily cause electric shock accidents.
2, manual welding work is generally interrupted welding, and A.C. welder, when zero load, still has no-load current to pass through in coil, can cause very large no-load losses like this.For example, suppose that the no-load losses of an A.C. welder is 400W, in weld job, the utilization rate of A.C. welder is 50%, work every day 8 hours, work in 1 month 25 days, the no-load losses in 1 year can be up to 480KW, this is equivalent to the power consumption of 1 5-6 of family family, and energy loss is quite serious.In addition, if adopt the mode of cutting off the electricity supply to reach the object of power saving in the process of interrupted welding, connect too continually and cut off the electricity supply that not only operating efficiency is very low, also can bring potential safety hazard to welder.
Summary of the invention
The invention provides a kind of A.C. welder, for realize auto-breaking when A.C. welder is unloaded.
The invention provides a kind of A.C. welder, comprise switch, the first fuse, the second fuse and welder transformer, also comprise transformer, A.C. contactor, the time relay, sensitive relay and resistance;
Wherein,
The first elementary terminals of described transformer are connected with the lower end of the second fuse with described the first fuse respectively with the second elementary terminals, first level terminals of described transformer are connected by the normally-closed contact of described resistance and A.C. contactor and the second output end binding post of described welder transformer, iron core the ground connection of the second subprime terminals connection transformer of described transformer, the first output end binding post ground connection of described welder transformer;
The normally opened contact of described A.C. contactor is in parallel with the normally-closed contact of described sensitive relay, and connect successively with the normally-closed contact of the described time relay and the coil of A.C. contactor, the branch road two ends that series connection obtains are connected with the second elementary terminals with the first elementary terminals of described transformer respectively; The first main contact of described A.C. contactor is connected with the lower end of the second fuse with described the first fuse respectively with one end of the second main contact, and the other end of described the first main contact and the second main contact is connected with second source side joint terminal with the first mains side binding post of described welder transformer respectively;
Coil one end of the described time relay is connected with the second output end binding post of described welder transformer and the normally-closed contact of described A.C. contactor, other end ground connection;
Coil one end of described sensitive relay is connected with the tie point of first level terminals of the normally-closed contact of described A.C. contactor and described transformer, other end ground connection.
As shown from the above technical solution; A.C. welder provided by the invention by setting up no-load automatic stop holding circuit on the basis of primary circuit; can make A.C. welder when welding rod does not contact with workpiece because of A.C. contactor without electricity do not work; and make A.C. welder when welding rod contacts with workpiece because of A.C. contactor again electricly normally work; thereby realize the no-load automatic stop function of A.C. welder; not only can prevent electric shock accidents; can also greatly reduce open circuit loss, improve security and energy saving in the A.C. welder course of work.
Accompanying drawing explanation
Fig. 1 is the circuit control principle drawing of A.C. welder in prior art.
Fig. 2 is the circuit control principle drawing of the present invention's A.C. welder with no-load automatic stop holding circuit.
Reference numeral is as follows:
| a-primary circuit; | b-no-load automatic stop holding circuit; |
| 1-switch; | 2,3-fuse; |
| 4-welder transformer; | 5-welding rod; |
| 6-workpiece; | 7-transformer; |
| 8-A.C. contactor; | the 9-time relay; |
| 10-sensitive relay; | 11-resistance; |
| 4 1, 4 2-welder transformer mains side binding post; | 4 3, 4 4-welder transformer output end binding post; |
| 7 1, 7 2-primary terminals; | 7 3, 7 4-transformer secondary output terminals; |
| 8 1, 8 2-AC contactor main contact; | 8 3-A.C. contactor normally opened contact; |
| 8 4-A.C. contactor normally-closed contact; | 9 1-time relay normally-closed contact; |
| 10 1-sensitive relay normally-closed contact. |
The specific embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.It should be noted that, in accompanying drawing or description, similar or identical element is all used identical Reference numeral.
First with reference to figure 2, Fig. 2 is the circuit control principle drawing of the present invention's A.C. welder with no-load automatic stop holding circuit, in Fig. 2, comprises primary circuit A and no-load automatic stop holding circuit B.As can be known from Fig. 2, primary circuit A comprises switch 1, fuse 2,3 and welder transformer 4, and no-load automatic stop holding circuit B comprises transformer 7, A.C. contactor 8, the time relay 9, sensitive relay 10 and resistance 11.In addition, in Fig. 2, also comprise welding rod 5 and workpiece 6 to be welded.
Particularly, switch 1 is respectively by the main contact 8 of fuse 2,3 and A.C. contactor 8
1, 8
2mains side binding post 4 with welder transformer 4
1, 4
2connect the output end binding post 4 of welder transformer 4
3connection workpiece 6 therewith ground connection, the output end binding post 4 of welder transformer 4
4be connected with welding rod 5.
The elementary terminals 7 of transformer 7
1, 7
2be connected respectively secondary terminals 7 with the lower end of fuse 2,3
3by the normally-closed contact 8 of resistance 11, A.C. contactor 8
4output end binding post 4 with welder transformer 4
4connect secondary terminals 7
4the iron core of connection transformer 7 ground connection, thus guarantee security and the economize on electricity property in the course of work.
A.C. contactor 8 has coil, main contact 8
1with 8
2, normally opened contact 8
3and normally-closed contact 8
4, described normally opened contact 8
3normally-closed contact 10 with sensitive relay 10
1parallel connection, and with the normally-closed contact 9 of the time relay 9
1connect successively with the coil of A.C. contactor 8, the branch road two ends that obtain of series connection respectively with the elementary terminals 7 of transformer 7
1, 7
2connect main contact 8
1, 8
2one end is connected with the lower end of fuse 2,3 respectively, the other end respectively with the power-line terminal 4 of welder transformer 4
1, 4
2connect.
The time relay 9 has coil and normally-closed contact 9
1, coil one end of this time relay 9 and the output end binding post 4 of welder transformer 4
4and the normally-closed contact 8 of A.C. contactor 8
4connect other end ground connection.
Sensitive relay 10 has coil and normally-closed contact 10
1, coil one end of this sensitive relay 10 and the normally-closed contact 8 of A.C. contactor 8
4secondary terminals 7 with transformer 7
3tie point connect, other end ground connection.
When the A.C. welder using as shown in Figure 2; for it loads alternating voltage; be generally 380V; close a switch after 1; generally include in the present embodiment sensitive relay 10 first electric and A.C. contactor 8 first electric two kinds of situations, next for the circuit control principle of the A.C. welder with no-load automatic stop holding circuit in the present embodiment, be described in detail respectively in above-mentioned two situations.
(1) sensitive relay 10 first electric
Particularly, close a switch 1, sensitive relay 10 by transformer 7 first electric, its normally-closed contact 10
1open, so that A.C. contactor 8 can not obtain in opening circuit is electric, the main contact 8 of A.C. contactor 8
1, 8
2can not be closed, thus make the mains side binding post 4 of welder transformer 4
1, 4
2two ends are without electricity, and A.C. welder is not worked.In addition, because A.C. contactor 8 must not be electric, so its normally opened contact 8
3open normally-closed contact 8
4closed.
Here it should be noted that, in order to ensure after switch 1 closure, sensitive relay 10 can obtain electric by transformer 7, induced voltage that can transformer 7 is set to be not less than the pick-up voltage of sensitive relay 10, for example in the present embodiment, induced voltage that can transformer 7 is set to 12V, and jointly shares the induced voltage of transformer 7 due to sensitive relay 10 and resistance 11, and therefore can select rated voltage is the sensitive relay 10 that 12V, pick-up voltage are 6V.The reason that resistance is set herein will be discussed later in more detail.
As mentioned above, before welder need to carry out weld job, although closed a switch 1, A.C. welder is not still worked without electricity, thereby reaches not only safety but also energy-conservation object.
When welder need to carry out weld job, welding rod 5 is contacted with workpiece 6, now, due to the normally-closed contact 8 of A.C. contactor 8 before
4closure, so normally-closed contact 8
4, output end binding post 4
4, welding rod 5 and workpiece 6 form loops, makes sensitive relay 10 short circuit dead electricity, its normally-closed contact 10
1closure, now, A.C. contactor 8 is by the normally-closed contact 9 of the time relay 9 in closure state
1with described normally-closed contact 10
1electric, the main contact 8 of A.C. contactor 8 then
1, 8
2closure, obtains welder transformer 4 electric, output end binding post 4
3, 4
4between produce operating voltage, A.C. welder is normally worked.In addition, because A.C. contactor 8 must be electric, its normally opened contact 8
3closure, normally-closed contact 8
4open, thus guarantee sensitive relay 10 can be in weld job process short circuit dead electricity again.
In addition; because workpiece 6 conventionally can be with rusty stain; cause when welding rod 5 contacts with workpiece 6; may not can sensitive relay 10 be caused to absolute short circuit; therefore as shown in Figure 2,, by resistance 11 is set, can suitably reduce the voltage at sensitive relay 10 coil two ends; thereby so that striking, the functional reliability of raising A.C. welder.The resistance that in the present embodiment, resistance 11 can be set is 15 Ω.
Here also it should be noted that, in order to ensure the normally-closed contact 9 of the time relay 9
1closure is so that A.C. contactor 8 can pass through normally-closed contact 9 when welding rod 5 contacts with workpiece 6
1with normally-closed contact 10
1obtain electric, induced voltage that can transformer 7 is set to be less than the pick-up voltage of the time relay 9, so that the time relay 9 can be not charged because of transformer 7, for example in the present embodiment, induced voltage that can transformer 7 is set to 12V, and consider that the weldingvoltage that welder transformer 4 produces is about 65V-80V conventionally, and when contacting with workpiece 6, is conventionally still with by welding rod 5 voltage of the 35V that has an appointment, therefore can select pick-up voltage is the time relay 9 of 60V, on the one hand so that the time relay 9 can not obtain electric and make its normally-closed contact 9 in the process contacting with workpiece 6 at welding rod 5
1open, while stopping weld job with box lunch on the other hand, make the time relay 9 electric, relevant circuit control principle while stopping weld job will be discussed in more detail below.In addition, the withstand voltage of the time relay 9 can be greater than 100V.
When welder need to stop weld job, welding rod 5 is separated with workpiece 6, so the time relay 9 is by output end binding post 4
4must be electric, after adhesive time delay, the normally-closed contact 9 of the time relay 9
1open, thereby again cut off the loop of A.C. contactor 8, A.C. contactor 8 dead electricity, its main contact 8
1, 8
2open, make welder transformer 4 power-off, A.C. welder quits work.In addition the normally-closed contact 8 of A.C. contactor 8,
4closure, normally opened contact 8
3open, can be because of output end binding post 4 thereby guarantee
3, 4
4the time relay 9 dead electricity are caused without electricity in two ends, make its normally-closed contact 9
1again closed, then make A.C. contactor 8 again electric.In the present embodiment, the adhesive time delay of the time relay 9 is generally 3s-10s.
When welder needs to carry out weld job again, can again welding rod 5 be contacted with workpiece 6, next repeat said process, repeat no more herein.
(2) A.C. contactor 8 first electric
Particularly, close a switch 1, A.C. contactor 8 is by the normally-closed contact 9 of the time relay 9
1normally-closed contact 10 with sensitive relay 10
1first electric, the normally opened contact 8 of A.C. contactor 8
3closure, normally-closed contact 8
4open main contact 8
1, 8
2closure, welder transformer 4 obtains electric generation weldingvoltage, and the time relay 9 obtains electric by welder transformer 4, after adhesive time delay, the normally-closed contact 9 of the time relay 9
1open, thereby the loop of cut-out A.C. contactor 8 makes A.C. welder power-off not work, the normally opened contact 8 of A.C. contactor 8 then
3open normally-closed contact 8
4closure, main contact 8
1, 8
2open.Sensitive relay 10 can obtain by transformer 7 electric, makes its normally-closed contact 10
1open.In the present embodiment, the rated current of A.C. contactor 8 can be 20A, and rated voltage is 380V.
When welder need to carry out weld job, welding rod 5 is contacted with workpiece 6, now, the time relay 9 dead electricity, make its normally-closed contact 9
1again closed, in addition, due to the normally-closed contact 8 of A.C. contactor 8 before
4closure, so normally-closed contact 8
4, output end binding post 4
4, welding rod 5 and workpiece 6 form loops, makes sensitive relay 10 short circuit dead electricity, makes its normally-closed contact 10
1closure, then, A.C. contactor 8 is by normally-closed contact 9
1with normally-closed contact 10
1must be electric, its main contact 8
1, 8
2closure, obtains welder transformer 4 electric, and A.C. welder is normally worked.In addition, because A.C. contactor 8 must be electric, its normally opened contact 8
3closure, normally-closed contact 8
4open, thus guarantee sensitive relay 10 can be in weld job process short circuit dead electricity again.
When welder need to stop weld job, welding rod 5 is separated with workpiece 6, so the time relay 9 is by output end binding post 4
4must be electric, after adhesive time delay, the normally-closed contact 9 of the time relay 9
1open, thereby again cut off the loop of A.C. contactor 8, A.C. contactor 8 dead electricity, its main contact 8
1, 8
2open, make welder transformer 4 power-off, A.C. welder quits work.In addition the normally-closed contact 8 of A.C. contactor 8,
4closure, normally opened contact 8
3open, can be because of output end binding post 4 thereby guarantee
3, 4
4the time relay 9 dead electricity are caused without electricity in two ends, make its normally-closed contact 9
1again closed, then make A.C. contactor 8 again electric.
When welder needs to carry out weld job again, can again welding rod 5 be contacted with workpiece 6, next repeat said process, repeat no more herein.
In the present embodiment, the magnitude of voltage exemplifying, current value or resistance value are also not only confined to this, can also fluctuate on this basis, specifically depending on actual conditions, repeat no longer one by one herein.
In sum, though be sensitive relay 10 first electric, or A.C. contactor 8 first electric, the no-load automatic stop holding circuit of A.C. welder of the present invention can be guaranteed when not carrying out welding operation (welding rod 5 does not contact with workpiece 6), A.C. welder can not worked without electricity because of A.C. contactor 8, and when carrying out welding operation (welding rod 5 contacts with workpiece 6), A.C. welder can must electricly normally be worked because of A.C. contactor 8, and can work as welding rod 5 and workpiece 6 when again separated, A.C. welder is again because A.C. contactor 8 dead electricity quit work, thereby realize the no-load automatic stop function of A.C. welder.In addition, A.C. welder of the present invention when not working, the secondary terminals 7 of transformer 7 only
3, 7
4between with the safe voltage of 12V; therefore in welding operation, finish after a period of time; if all non-contact electric is dangerous when changing welding rod or carrying out the dangerous play of some other contact welding rod; and transformer 7 voltages are only 12V; the electric energy consuming while comparing existing A.C. welder zero load; the electric energy with the A.C. welder of no-load automatic stop holding circuit of the present invention significantly improves, and reaches not only safety but also energy-conservation object.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. an A.C. welder, comprises switch, the first fuse, the second fuse and welder transformer, it is characterized in that, also comprises transformer, A.C. contactor, the time relay, sensitive relay and resistance; Wherein,
The first elementary terminals of described transformer are connected with the lower end of the second fuse with described the first fuse respectively with the second elementary terminals, first level terminals of described transformer are connected by the normally-closed contact of described resistance and A.C. contactor and the second output end binding post of described welder transformer, iron core the ground connection of the second subprime terminals connection transformer of described transformer, the first output end binding post ground connection of described welder transformer;
The normally opened contact of described A.C. contactor is in parallel with the normally-closed contact of described sensitive relay, and connect successively with the normally-closed contact of the described time relay and the coil of A.C. contactor, the branch road two ends that series connection obtains are connected with the second elementary terminals with the first elementary terminals of described transformer respectively; The first main contact of described A.C. contactor is connected with the lower end of the second fuse with described the first fuse respectively with one end of the second main contact, and the other end of described the first main contact and the second main contact is connected with second source side joint terminal with the first mains side binding post of described welder transformer respectively;
Coil one end of the described time relay is connected with the second output end binding post of described welder transformer and the normally-closed contact of described A.C. contactor, other end ground connection;
Coil one end of described sensitive relay is connected with the tie point of first level terminals of the normally-closed contact of described A.C. contactor and described transformer, other end ground connection.
2. A.C. welder according to claim 1, is characterized in that, the second output end binding post of described welder transformer is connected with welding rod.
3. A.C. welder according to claim 1, is characterized in that, the induced voltage of described transformer is 12V.
4. A.C. welder according to claim 1, is characterized in that, the rated current of described A.C. contactor is 20A, and rated voltage is 380V.
5. A.C. welder according to claim 1, is characterized in that, the pick-up voltage of the described time relay is 60V.
6. A.C. welder according to claim 1, is characterized in that, the rated voltage of described sensitive relay is 12V, and pick-up voltage is 6V.
7. A.C. welder according to claim 1, is characterized in that, the resistance of described resistance is 15 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215275.3A CN102896402B (en) | 2011-07-29 | 2011-07-29 | AC welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215275.3A CN102896402B (en) | 2011-07-29 | 2011-07-29 | AC welder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102896402A CN102896402A (en) | 2013-01-30 |
| CN102896402B true CN102896402B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110215275.3A Active CN102896402B (en) | 2011-07-29 | 2011-07-29 | AC welder |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104416294B (en) * | 2013-09-05 | 2016-06-15 | 信义汽车玻璃(深圳)有限公司 | A kind of bonding machine |
| US11305369B2 (en) | 2018-08-29 | 2022-04-19 | Lincoln Global, Inc. | Engine-based welder with auto-start feature |
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| SU1169793A1 (en) * | 1983-09-15 | 1985-07-30 | Mark M Moroshek | Device for automatic control of welding circuit in arc welding |
| CN88100985A (en) * | 1988-02-16 | 1988-08-24 | 江西省崇仁节能电器厂 | Non-loaded energy-saving device of AC arc welding machine |
| CN201300275Y (en) * | 2008-08-12 | 2009-09-02 | 中建三局第三建设工程有限责任公司 | An idle-load automatic stop power saving device for ac welding machine |
| CN201471062U (en) * | 2009-04-01 | 2010-05-19 | 杨津 | Full-automatic no-load energy-saving welding machine |
| CN201735933U (en) * | 2010-06-12 | 2011-02-09 | 禹州市电力工业公司 | Delay controller circuit of electric welder |
| CN202240074U (en) * | 2011-07-29 | 2012-05-30 | 淮南矿业(集团)有限责任公司 | Alternating current welder |
-
2011
- 2011-07-29 CN CN201110215275.3A patent/CN102896402B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1169793A1 (en) * | 1983-09-15 | 1985-07-30 | Mark M Moroshek | Device for automatic control of welding circuit in arc welding |
| CN88100985A (en) * | 1988-02-16 | 1988-08-24 | 江西省崇仁节能电器厂 | Non-loaded energy-saving device of AC arc welding machine |
| CN201300275Y (en) * | 2008-08-12 | 2009-09-02 | 中建三局第三建设工程有限责任公司 | An idle-load automatic stop power saving device for ac welding machine |
| CN201471062U (en) * | 2009-04-01 | 2010-05-19 | 杨津 | Full-automatic no-load energy-saving welding machine |
| CN201735933U (en) * | 2010-06-12 | 2011-02-09 | 禹州市电力工业公司 | Delay controller circuit of electric welder |
| CN202240074U (en) * | 2011-07-29 | 2012-05-30 | 淮南矿业(集团)有限责任公司 | Alternating current welder |
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|---|---|
| CN102896402A (en) | 2013-01-30 |
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