CN102935535B - 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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- CN102935535B CN102935535B CN201210516546.3A CN201210516546A CN102935535B CN 102935535 B CN102935535 B CN 102935535B CN 201210516546 A CN201210516546 A CN 201210516546A CN 102935535 B CN102935535 B CN 102935535B
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- soldering bit
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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 conventional soldering means, and in electronic product manufacture field, application is very extensive.In brazing process, solder can melt under the entrained heat effect of electric iron, simultaneously at the material surface wetting and spreading to be welded being heated by electric iron, withdraws after flatiron, and solder is cooling, solidify and form manual solder joint.In electric iron preheating material to be welded and welding process, if the heat 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 ensure, solder is good at welding surface wetting and spreading, just need electric iron can supply enough heats for metal carrying to be welded before welding and in process, if ensure, 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 the welding material such as Ag, Au, their dissolution velocities in molten solder are exceedingly fast, and easily generate intermetallic compound and cause solder joint hydraulic performance decline.
At present, most electric soldering bit is all universal tool, in the time of 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 when welding reach and can weld temperature, can make circuit board be subject to high temperature causes the probability damaging 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 there is the larger temperature difference, can cause like this response situation of solder and metal to be welded also will to have very large difference, 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 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, 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, shortened the preheating time before welding, reduce the risk that circuit board is burnt;
2, the structure of electric soldering bit can ensure 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, add in welding wire welding process at manual welding, 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 ensure heated, the intensification simultaneously of wire and pad, reaches fast temperature to be welded, can be in shortening weld interval, avoid due to the inhomogeneous or not enough rosin joint defect causing of heat input;
4, by shortening the wetting and spreading time of scolder in welding process, avoid the undue dissolving of the metal such as braze metal and pad and 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 portion fit together, can be according to the wire of different radii, determine to change the electric soldering bit matching with wire, and practical.
Brief description of the drawings
Fig. 1 is the front view of the electric soldering bit in the present invention, and wherein 1 is electric soldering bit, and 2 is wire, and 3 is pad; Fig. 2 is the left view of the electric soldering bit in the present invention, and wherein 1 is electric soldering bit, and 2 is wire, and 3 is pad.
Detailed description of the invention
Detailed description of the invention one: there is a gap at the middle part of electric soldering bit end, 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, shortened the preheating time before welding, reduce the risk that circuit board is burnt;
2, the structure of electric soldering bit can ensure 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, add in welding wire welding process at manual welding, 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 ensure heated, the intensification simultaneously of wire and pad, reaches fast temperature to be welded, can be in shortening weld interval, avoid due to the inhomogeneous or not enough rosin joint defect causing of heat input;
4, by shortening the wetting and spreading time of scolder in welding process, avoid the undue dissolving of the metal such as braze metal and pad and 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 portion fit together, can be according to the wire of different radii, determine to change the electric soldering bit matching with wire, and practical.
Detailed description of the invention two: present embodiment is different from detailed description of the invention one: described gap be shaped as circular arc, triangle or square.Other structure and annexation are identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is different from detailed description of the invention 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 detailed description of the invention one.
Detailed description of the invention four: present embodiment is different from one of detailed description of the invention one to three: described electric soldering bit end gap is circular arc gap, the corresponding arc chord angle of this circular arc gap is β, its size is: 90 ° of < β <180 °, the corresponding radius of circular arc gap is 0.5mm ~ 4mm, circular arc top is the diameter of wire to be welded to the distance of pad place plane, the bottom of the right side part of this circular arc gap is one rectangular flat, the nearly gap end of right side part of circular arc gap is inclined-plane, the angle of itself and horizontal plane is α angle, its size is: 45 ° of < α <75 °, the right side part gap end far away of circular arc gap is vertical plane, the angle of itself and horizontal plane is 90 °.Other structure and annexation are identical with one of detailed description of the invention one to three.
Wherein the length of gap is 3mm ~ 10mm.
Detailed description of the invention five: present embodiment is different from one of detailed description of the invention one to four: the corresponding arc chord angle β of described circular arc gap is: 100 ° of < β <150 °.Other structure and annexation are identical with one of detailed description of the invention one to four.
Detailed description of the invention six: present embodiment is different from one of detailed description of the invention 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 detailed description of the invention one to four.
Detailed description of the invention seven: present embodiment is different from one of detailed description of the invention one to six: described α angle is: 48 ° of < α <65 °.Other structure and annexation are identical with one of detailed description of the invention one to six.
Detailed description of the invention eight: present embodiment is different from one of detailed description of the invention one to six: described α angle is 50 °.Other structure and annexation are identical with one of detailed description of the invention one to six.
Detailed description of the invention nine: present embodiment is different from one of detailed description of the invention one to eight: the inclined-plane of the nearly gap end of right side part of described circular arc gap and the summit place of horizontal plane angle adopt arc transition.Other structure and annexation are identical with one of detailed description of the invention one to eight.
Adopt this structure, can avoid the electric iron that causes due to diameter of wire deviation and the loose contact of wire and pad.
Detailed description of the invention ten: present embodiment is different from one of detailed description of the invention one to nine: hot thermostatic type mode of heating in the inner employing of described electric soldering bit, heating-up temperature is 200 DEG C ~ 500 DEG C, and the space place that in welding process, welding wire forms between the left part of gap and pad plane adds.Other structure and annexation are identical with one of detailed description of the invention one to nine.
Claims (7)
1. one kind can be improved the manual electric soldering bit of wire and pad welding efficiency and reliability, there is a gap at the middle part that it is characterized in that electric soldering bit end, the right side part of gap is longer than the left part of gap, this gap is circular arc gap, the corresponding arc chord angle of circular arc gap is β, its size is: 90 ° of < β <180 °, the corresponding radius of circular arc gap is 0.5mm～4mm, circular arc top is the diameter of wire to be welded to the distance of pad place plane, the bottom of the right side part of this circular arc gap is one rectangular flat, the nearly gap end of right side part of circular arc gap is inclined-plane, the angle of itself and horizontal plane is α angle, its size is: 45 ° of < α <75 °, the right side part gap end far away of circular arc gap is vertical plane, the angle of itself and horizontal plane is 90 °.
2. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that the corresponding arc chord angle β of described circular arc gap is: 100 ° of < β <150 °.
3. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that the corresponding arc chord angle β of described circular arc gap is 120 °.
4. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that described α angle is: 48 ° of < α <65 °.
5. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that described α angle is 50 °.
6. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that the inclined-plane of the nearly gap end of right side part of described circular arc gap and the summit place of horizontal plane angle adopt arc transition.
7. a kind of manual electric soldering bit that improves wire and pad welding efficiency and reliability according to claim 1, is characterized in that hot thermostatic type mode of heating in the inner employing of described electric soldering bit, and heating-up temperature is 200 DEG C～500 DEG C.
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 CN102935535A (en) | 2013-02-20 |
| CN102935535B true CN102935535B (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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| CN (1) | CN102935535B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (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 |
| CN100548556C (en) * | 2008-05-12 | 2009-10-14 | 清华大学 | The solder horn that is used for automation soldering between Electret condenser microphone and FPC |
| JP2011020172A (en) * | 2009-07-21 | 2011-02-03 | Toyota Motor Corp | Soldering iron tip, apparatus and method of determining life thereof |
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2012
- 2012-12-05 CN CN201210516546.3A patent/CN102935535B/en not_active Expired - Fee Related
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| CN102935535A (en) | 2013-02-20 |
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