CN102935535A - Manual electric soldering bit capable of increasing welding efficiency of lead and bonding pad and improving welding reliability of lead and bonding pad - Google Patents
Manual electric soldering bit capable of increasing welding efficiency of lead and bonding pad and improving welding reliability of lead and bonding pad Download PDFInfo
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- CN102935535A CN102935535A CN2012105165463A CN201210516546A CN102935535A CN 102935535 A CN102935535 A CN 102935535A CN 2012105165463 A CN2012105165463 A CN 2012105165463A CN 201210516546 A CN201210516546 A CN 201210516546A CN 102935535 A CN102935535 A CN 102935535A
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- electric soldering
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Abstract
The invention discloses a manual electric soldering bit capable of increasing the welding efficiency of a lead and a bonding pad and improving the welding reliability of the lead and the bonding pad, which relates to a manual electric soldering bit and aims to solve the problem that a circuit board is damaged at high temperature because the preheating and welding time is prolonged by using the traditional electric soldering bit to heat the lead and the bonding pad in a thermal conduction way and the problem of welding point reliability reduction caused by long-time severe interface reaction because of differences of microstructures inside a welding line, which is caused by non-uniform temperature of a part to be welded. The manual electric soldering bit disclosed by the invention has a structure as follows: the middle part of the end of the electric soldering bit is provided with an opening with the length of 3-10mm; the right part of the opening is longer than the left part of the opening; and a welding wire is added in a space formed between the left part of the opening and the plane of the bonding pad in a welding process. The manual electric soldering bit is suitable for the field of welding engineering of electronic devices.
Description
Technical field
The present invention relates to manual electric soldering bit.
Background technology
Manual soldering is a kind of soldering means commonly used, and in electronic product manufacture field, application is very extensive.In brazing process, solder can melt under the heat effect entrained at electric iron, and simultaneously at the material surface wetting and spreading to be welded heated by electric iron, after withdrawing flatiron, solder is cooling, solidify and form manual solder joint.In electric iron preheating material to be welded and welding process, if heat time heating time is long, likely can cause the scaling loss of the non-refractory materials such as circuit board.In addition, the reliability of solder joint by solder the wetting and spreading situation of metal surface to be welded with and inner microstructure determine.If guarantee, solder is good at the welding surface wetting and spreading, just needing electric iron can be for metal carrying to be welded for enough heat before welding and in process, if guarantee, the heterogeneous microstructure of weld seam is good, need to control the temperature and time of reaction, if excess Temperature and reaction time are long, can cause metal to be welded too to be dissolved by solder, form too much intermetallic compound, and intermetallic compound generally enbrittles, if too much intermetallic compound generation can cause solder joint performance and reliability decrease.Particularly, for welding materials such as Ag, Au, their dissolution velocities in molten solder are exceedingly fast, and easily generate intermetallic compound and cause the solder joint hydraulic performance decline.
At present, most electric soldering bit is all universal tool, when welding lead and pad, because the structure of wire and pad is respectively cylinder and cuboid, electric iron is all generally the local surfaces that is pressed in wire, heat pad and all the other wires by heat conducting mode, and can not be simultaneously, heating wires and pad equably.Therefore, time chien shih pad and wire that need to be longer during welding reach and can weld temperature, can make circuit board be subject to high temperature causes the probability damaged to increase, simultaneously, scolder also will extend in the wetting and spreading time of wire and bond pad surface, and this reaction time that just means liquid solder and metal to be welded also will extend.Due to the local heat to wire, make wire different parts and and pad between can have the larger temperature difference, can cause like this response situation of solder and metal to be welded also very large difference will be arranged, cause the heterogeneous microstructure of weld seam inside there are differences.Reliability that will butt welding point causes huge hidden danger.
Summary of the invention
The present invention will solve existing electric iron by heat conducting mode heating wires and pad, can extend preheating and cause weld interval circuit board to be subject to high temperature and the damage problem, and position to be welded non-uniform temperature causes the heterogeneous microstructure of weld seam inside there are differences, long-time reaction makes interfacial reaction acutely cause the problem of the reliability decrease of solder joint, and a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability is provided.
A kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability in the present invention, its structure is: there is a gap at the middle part of electric soldering bit end, and the right side part of gap is longer than the left part of gap.
The present invention includes following advantage:
1, due to the design of electric soldering bit heat transfer structure, can improve the heat transfer efficiency of electric iron and wire and pad, make front shortening preheating time of welding, reduced the risk that circuit board is burnt;
2, the structure of electric soldering bit can guarantee that wire and pad are climbed to temperature to be welded, and temperature is even in the length range of whole wire to be welded and pad.Therefore, at manual welding, add in welding wire welding process, solder can be sprawled at wire to be welded and pad metal moistened surface fast, will effectively shorten weld interval;
3, this electric soldering bit, in heating process, can guarantee that wire and pad are heated simultaneously, heat up, and reaches fast temperature to be welded, can, when shortening weld interval, avoid due to the inhomogeneous or not enough rosin joint defect caused of heat input;
4, by shortening the wetting and spreading time of scolder in welding process, avoided the undue dissolving of braze metal and pad and the metals such as conductive line surfaces Au, Ag, can make the quantity of compound between the brittle metal in weld seam greatly reduce, thereby realize the lifting of weld seam reliability.
5, electric soldering bit and electric iron body section fit together, and can determine to change the electric soldering bit be complementary with wire according to the wire of different radii, practical.
The accompanying drawing explanation
The front view that Fig. 1 is the electric soldering bit in the present invention, wherein 1 is electric soldering bit, and 2 is wire, and 3 is pad; The left view that Fig. 2 is the electric soldering bit in the present invention, wherein 1 is electric soldering bit, and 2 is wire, and 3 is pad.
The specific embodiment
The specific embodiment one: there is a gap at the middle part of electric soldering bit end, and the right side part of gap is longer than the left part of gap.
The present invention includes following advantage:
1, due to the design of electric soldering bit heat transfer structure, can improve the heat transfer efficiency of electric iron and wire and pad, make front shortening preheating time of welding, reduced the risk that circuit board is burnt;
2, the structure of electric soldering bit can guarantee that wire and pad are climbed to temperature to be welded, and temperature is even in the length range of whole wire to be welded and pad.Therefore, at manual welding, add in welding wire welding process, solder can be sprawled at wire to be welded and pad metal moistened surface fast, will effectively shorten weld interval;
3, this electric soldering bit, in heating process, can guarantee that wire and pad are heated simultaneously, heat up, and reaches fast temperature to be welded, can, when shortening weld interval, avoid due to the inhomogeneous or not enough rosin joint defect caused of heat input;
4, by shortening the wetting and spreading time of scolder in welding process, avoided the undue dissolving of braze metal and pad and the metals such as conductive line surfaces Au, Ag, can make the quantity of compound between the brittle metal in weld seam greatly reduce, thereby realize the lifting of weld seam reliability;
5, electric soldering bit and electric iron body section fit together, and can determine to change the electric soldering bit be complementary with wire according to the wire of different radii, practical.
The specific embodiment two: present embodiment is different from the specific embodiment one: described gap be shaped as circular arc, triangle or square.Other structure and annexation are identical with the specific embodiment one.
The specific embodiment three: present embodiment is different from the specific embodiment one: at the bottom of the bottom of the right side part of described gap is flat, the sharp end or circular arc.Other structure and annexation are identical with the specific embodiment one.
The specific embodiment four: present embodiment is different from one of specific embodiment one to three: described electric soldering bit end gap is the circular arc gap, the corresponding arc chord angle of this circular arc gap is β, its size is: 90 °<β<180 °, the corresponding radius of circular arc gap is 0.5mm ~ 4mm, the circular arc top is the diameter of wire to be welded to the distance on plane, pad place, the bottom of the right side part of this circular arc gap is one rectangular flat, the nearly gap end of the right side part of circular arc gap is inclined-plane, the angle of itself and horizontal plane is the α angle, its size is: 45 °<α<75 °, the right side part of circular arc gap gap end far away is vertical plane, the angle of itself and horizontal plane is 90 °.Other structure and annexation are identical with one of specific embodiment one to three.
Wherein the length of gap is 3mm ~ 10mm.
The specific embodiment five: present embodiment is different from one of specific embodiment one to four: the corresponding arc chord angle β of described circular arc gap is: 100 °<β<150 °.Other structure and annexation are identical with one of specific embodiment one to four.
The specific embodiment six: present embodiment is different from one of specific embodiment one to four: the corresponding arc chord angle β of described circular arc gap is 120 °.Other structure and annexation are identical with one of specific embodiment one to four.
The specific embodiment seven: present embodiment is different from one of specific embodiment one to six: described α angle is: 48 °<α<65 °.Other structure and annexation are identical with one of specific embodiment one to six.
The specific embodiment eight: present embodiment is different from one of specific embodiment one to six: described α angle is 50 °.Other structure and annexation are identical with one of specific embodiment one to six.
The specific embodiment nine: present embodiment is different from one of specific embodiment one to eight: the inclined-plane of the nearly gap end of right side part of described circular arc gap and place, the summit of horizontal plane angle adopt arc transition.Other structure and annexation are identical with one of specific embodiment one to eight.
Adopt this structure, can avoid the electric iron that causes due to the diameter of wire deviation and the loose contact of wire and pad.
The specific embodiment ten: present embodiment is different from one of specific embodiment one to nine: hot thermostatic type mode of heating in the inner employing of described electric soldering bit, heating-up temperature is 200 ℃ ~ 500 ℃, and the place, space that in the welding process, welding wire forms between the left part of gap and pad plane adds.Other structure and annexation are identical with one of specific embodiment one to nine.
Claims (10)
1. the manual electric soldering bit that can improve wire and pad welding efficiency and reliability, is characterized in that there is a gap at the middle part of electric soldering bit end, and the right side part of gap is longer than the left part of gap.
2. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, what it is characterized in that described gap is shaped as circular arc, triangle or square.
3. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, at the bottom of the bottom that it is characterized in that the right side part of described gap is flat, the sharp end or circular arc.
4. according to the described a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability of any one in claims 1 to 3, it is characterized in that described electric soldering bit end gap is the circular arc gap, the corresponding arc chord angle of this circular arc gap is β, its size is: 90 °<β<180 °, the corresponding radius of circular arc gap is 0.5mm ~ 4mm, the circular arc top is the diameter of wire to be welded to the distance on plane, pad place, the bottom of the right side part of this circular arc gap is one rectangular flat, the nearly gap end of the right side part of circular arc gap is inclined-plane, the angle of itself and horizontal plane is the α angle, its size is: 45 °<α<75 °, the right side part of circular arc gap gap end far away is vertical plane, the angle of itself and horizontal plane is 90 °.
5. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 4, is characterized in that the corresponding arc chord angle β of described circular arc gap is: 100 °<β<150 °.
6. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 4, is characterized in that the corresponding arc chord angle β of described circular arc gap is 120 °.
7. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 4, is characterized in that described α angle is: 48 °<α<65 °.
8. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 4, is characterized in that described α angle is 50 °.
9. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 4, is characterized in that the inclined-plane of the nearly gap end of right side part of described circular arc gap and the place, summit of horizontal plane angle adopt arc transition.
10. according to the described a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability of any one in claims 1 to 3, it is characterized in that hot thermostatic type mode of heating in the inner employing of described electric soldering bit, heating-up temperature is 200 ℃ ~ 500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516546.3A CN102935535B (en) | 2012-12-05 | 2012-12-05 | Manual electric soldering bit capable of increasing welding efficiency of lead and bonding pad and improving welding reliability of lead and bonding pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516546.3A CN102935535B (en) | 2012-12-05 | 2012-12-05 | Manual electric soldering bit capable of increasing welding efficiency of lead and bonding pad and improving welding reliability of lead and bonding pad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102935535A true CN102935535A (en) | 2013-02-20 |
| CN102935535B CN102935535B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210516546.3A Expired - Fee Related CN102935535B (en) | 2012-12-05 | 2012-12-05 | Manual electric soldering bit capable of increasing welding efficiency of lead and bonding pad and improving welding reliability of lead and bonding pad |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860759A (en) * | 2019-12-26 | 2020-03-06 | 广州市谊华电子设备有限公司 | Electric soldering iron robot capable of rapidly soldering tin |
| CN110935979A (en) * | 2019-12-26 | 2020-03-31 | 广州市谊华电子设备有限公司 | Soldering tin piece and electric soldering iron capable of quickly soldering tin |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2153434Y (en) * | 1993-04-12 | 1994-01-19 | 王绍增 | Hand operated electric iron with tin feeding device |
| JPH08162754A (en) * | 1994-12-07 | 1996-06-21 | Nagoya Denki Kogyo Kk | Automatic correction system for defective soldering |
| CN2407869Y (en) * | 2000-02-03 | 2000-11-29 | 邓树平 | Electric iron head with positioning hole |
| CN2778450Y (en) * | 2004-12-23 | 2006-05-10 | 曾云发 | Multifunctional long-life welding tip |
| CN101269430A (en) * | 2008-05-12 | 2008-09-24 | 清华大学 | Welding head for electret microphone-FPC automatization plumb joint |
| JP2011020172A (en) * | 2009-07-21 | 2011-02-03 | Toyota Motor Corp | Soldering iron tip, apparatus and method of determining life thereof |
-
2012
- 2012-12-05 CN CN201210516546.3A patent/CN102935535B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2153434Y (en) * | 1993-04-12 | 1994-01-19 | 王绍增 | Hand operated electric iron with tin feeding device |
| JPH08162754A (en) * | 1994-12-07 | 1996-06-21 | Nagoya Denki Kogyo Kk | Automatic correction system for defective soldering |
| CN2407869Y (en) * | 2000-02-03 | 2000-11-29 | 邓树平 | Electric iron head with positioning hole |
| CN2778450Y (en) * | 2004-12-23 | 2006-05-10 | 曾云发 | Multifunctional long-life welding tip |
| CN101269430A (en) * | 2008-05-12 | 2008-09-24 | 清华大学 | Welding head for electret microphone-FPC automatization plumb joint |
| JP2011020172A (en) * | 2009-07-21 | 2011-02-03 | Toyota Motor Corp | Soldering iron tip, apparatus and method of determining life thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860759A (en) * | 2019-12-26 | 2020-03-06 | 广州市谊华电子设备有限公司 | Electric soldering iron robot capable of rapidly soldering tin |
| CN110935979A (en) * | 2019-12-26 | 2020-03-31 | 广州市谊华电子设备有限公司 | Soldering tin piece and electric soldering iron capable of quickly soldering tin |
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| CN102935535B (en) | 2014-12-03 |
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