CA1046861A - Soldering iron for soldering a plurality of wires to a connector - Google Patents
Soldering iron for soldering a plurality of wires to a connectorInfo
- Publication number
- CA1046861A CA1046861A CA218,240A CA218240A CA1046861A CA 1046861 A CA1046861 A CA 1046861A CA 218240 A CA218240 A CA 218240A CA 1046861 A CA1046861 A CA 1046861A
- Authority
- CA
- Canada
- Prior art keywords
- iron
- solder
- metal
- wires
- connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0249—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for simultaneous welding or soldering of a plurality of wires to contact elements
Abstract
ABSTRACT OF THE DISCLOSURE
This invention relates to soldering irons, particularly to soldering irons for soldering wires into a multicore connec-tor. According to the prior art, each wire is hand soldered into corresponding metal lined channels in the connector. The wire coverings are stripped individually, and the wires are applied and soldered individually with a conventional soldering iron to a metal liner in the connector. In another method, solder is applied to the wires and to the metal lines. The wires are then inserted into the metal liners and each wire is soldered individually to its encompassing liner by melting the previously applied solder with a conventional soldering iron.
Recently, a wire positioning device has been developed which automatically cuts, strips, and positions the wires in their metal liners. However, each wire must still be individually hand soldered. The present invention provides a soldering iron in the form of a heat conducting plate having a plurality of projections at one end. The projections are spaced to corres-pond to the spacing of the metal liners in the connector. The sides of each projection converge towards its tip and are plated to resist oxidation and to be easily wetted by the solder. The tips of the projections can be positioned within the channels in the connector with their converging sides contacting respec-tive edges of the metal liner. In such position, heat can be conducted by the iron to solder wires positioned in the metal liners.
This invention relates to soldering irons, particularly to soldering irons for soldering wires into a multicore connec-tor. According to the prior art, each wire is hand soldered into corresponding metal lined channels in the connector. The wire coverings are stripped individually, and the wires are applied and soldered individually with a conventional soldering iron to a metal liner in the connector. In another method, solder is applied to the wires and to the metal lines. The wires are then inserted into the metal liners and each wire is soldered individually to its encompassing liner by melting the previously applied solder with a conventional soldering iron.
Recently, a wire positioning device has been developed which automatically cuts, strips, and positions the wires in their metal liners. However, each wire must still be individually hand soldered. The present invention provides a soldering iron in the form of a heat conducting plate having a plurality of projections at one end. The projections are spaced to corres-pond to the spacing of the metal liners in the connector. The sides of each projection converge towards its tip and are plated to resist oxidation and to be easily wetted by the solder. The tips of the projections can be positioned within the channels in the connector with their converging sides contacting respec-tive edges of the metal liner. In such position, heat can be conducted by the iron to solder wires positioned in the metal liners.
Description
04686~
EACK~RO~ND OF THE INVENTION
This lnventlon relates to soldering irons for solderlng wlres to a connector, partlcularly to a soldering iron ~or simultaneously soldering a plurallty o~ wlres to metal llners in channels of a connector.
In the past, various methods of hand solderlng have been adopted ~or connecting wires to multi-core connectors whlch are widely used in eleatronlc devlces. For example, in one mtthod the coverlngs o~ wlres are peeled of~ one by one and then the wires are applled and soldered one by one to each metal llner ln the connector. Another example 19 a method ln which wires (to which solder has already been applled) are placed in metal llners (to whlch solder has been applled) and each wlre 1B soldered one at a tlme to the lnslde of lts encompassing liner by melting the previously applled solder wlth a solderlng lron. These methods are lnefflclent and requlre great sklll ln order to accompllsh rellable and neat solderlng.
A wlre posltloning device re¢ently came into use whlch posltlons the connecting wires parallel and at the proper dls-20 tances apart ao as to match the corresponding metal liners inthe multl-core connector. T'ne wlre posltioning device auto-matlcally cuts the wlres, strlps of~ the wire coverings, and places the stripped conductor of the wlres into each metal llner, thus sharply reduclng the palnstaklng nature o~ the work at the tlme of soldering. However, the wlres whlch have been automatl-cally strlpped and posltloned by the wlre posltlonlng device must stlll be hand-soldered one at a time to the metal llners.
~,:
Such hand solderlng lacks efflclency and uni~orm hlgh quallty.
SUMMARY OF ~HE INVENTION
It ls an ob~ect of the inventlon to provide a solderlng ron whlch can automatlcally and slmultaneously solder a plur-ality o~ wires to metal l~ners ln respectlve channels ln a con-nector Accordlng to the inventlon, a plate o~ heat conductlng material is provided with a plurality of projections on an end face, The projections are spaced to correspond to the spacing of the metal liners in the channels of the connector, The sides of each of the projections converge toward the extremity of the projection, The projections are dimensioned so that their ex-tremities can be positioned within the metal lined channels so that their converging sides contact respective edges of the metal liners. Thus, the soldering iron can conduct heat to solder the wires placed within the channels to the corresponding metal liners.
The converging sides of the projections are plated with material which prevents oxidation and causes the solder to wet the converg-ing sides, and the surfaces of the plate other than the converging sides are plated with a second material to prevent oxidation and to prevent wetting by the solder.
BRIEF DESCRI~TION OF THE DRAWINGS
The invention will now be described in detail with ref-' erence to the accompanying drawings representing preferred em-bodiments of the soldering iron according to the present invention.
~ , ~
In the drawings:
Fig, 1 is a partial side view of a known wire position~
~ ing device suitable for use with the soldering iron of the invention;
,` Fig, 2 is a top view of wires positioned in a connector by means of the wire positioning device shown in Figo l;
Fig, 3 is a partial cross-sectional end view of a sold-ering iron having rectangular projections which is shown for com-parison with the soldering iron of this invention;
Figs. 4a and 4b shownpartial cross-sections in an end view and a side view, respectively, of a soldering iron according to the invention;
- 30 Fig. 5 is a partial cross-sectional end view of one , embodiment of the soldering iron of this invention;
`; Fig. 6 is a partial cross-sectional end view showing , ~ ~ -2-.~
:
104686~
the use of the soldring iron of this invention;
Fig, 7 is a partial cross-sectional end view of the ' ,~','~ ' ~' .~ .
, .. ~: .
~s -2a-,~,..:
04686~
~olderlng lron of Figure 3 havlng rectangular pro~ectlons;
Flg. 8 is a slde view oP two diPferent conPigurations A and B, of pro~ectlons havlng curved sides according to embodl-ments of the invention;
Flg. 9 18 a slde view of two different configurations, C and D, of spaced apart pro~ectlons accordlng to embodlments Or thls lnventlon; and Fig. 10 ls a partial ~lde vlew of a solderlng iron showing its plated surfaces accordlng to an embodlment of this 10 lnvention .
DESCRIPTION OF THE PREFEMED EMBODIMENq~S
The soldering lron of this lnventlon can be used wlth a known wire posltlonlng devlce 2 such as shown ln Flgure 1.
In thi~ devlce, a multi-wlre cord 4 18 attached to a positlonlng stand 6, and each indivldual wire 8 18 inserted lnto a groove o~ ~-an allgnment ~lg 10 whlch has grooves at lntervals correspond-lng to the intervals at whlch the wires wlll be ~olned to a connector. The ends of the wlres are held by a wlre holder 12.
In thls fashlon, the wlres are llned up and held. Then a cut- -20 tlng blade 14 and a strlpplng blade 16 are automatlcally lowered `-onto a recelvlng stand 18. The wlres 8 are cut at locatlon 9, and at locatlon 11 the strlpplng blade 16 cuts lnto the wlre coverings. With the stripplng blade 16 still lowered, the po~ltlonlng stand 6 is moved and the wire coverings are pulled ofP by the strlpping blade.
Next, the cutting blade 14, the stripping blade 16J the allgnment ~lg 10 and the recelving stand 18 are moved out of the way. Then, a connector 20 18 automatlcally posltloned and the positloning stand 6 18 returned to ltQ orlglnal po~ltlon 80 30 that the conductors of the strlpped wires 22 are applied to the ~- connec'cor 20 as shown ln Flgure 2. Thus the operations needed - for the connection of wires 8 to the connector 20 are greatly reduced by use of the wlre po~ltlonlng device 2.
10~6861 - ~ -However, the solderlng of the wlres to the connector ls ~till done by hand, and therefore the process is still ineffl-clent and uniformly soldered ~oints are difflcult to obtain.
Consequently, a soldering iron i8 needed which solders these multiple wires automatically and simul~aneously. Figure 3 shows a proposed automatic soldering iron which was not completely satisfactory, and is described for comparlson and better under-standing of the soldering iron of this invention. A~ shown ln Figure 3, conductors o~ the stripped wires 22 are placed ln 10 metal liners 24 ln channels 26 in the connector 20, and solder 28 is placed over the top of the liners 24. The soldering iron 30 has rectangular shaped pro~ections 33 at intervals corres-ponding with the metal llners 24, and these proJections 33 are of such wldth and length that they can be lowered into the metal llners. This soldering iron 30 is lowered automatically onto the solder 28 and melts the solder thus attaching the wlres 8 to the metal liners 24 of the connector 20 simultaneou~ly and !.. ~ automatically. However, a solderlng iron of such a structure has shortcomings. For example, the amounts of solder getting lnto the metal liners are not only small but also not unlform.
In the worst cases, some metal lineræ get little solder, thus maklng rellable soldering difficult. Also, the life of the soldering lron is short and quite unsatisfactory.
Figures 4a and 4b show the front vlew and the side vlew of a section of the lron of the present lnventlon. The lron 32 ls a plate 34 whlch has a heating section 36 and pro-~ections 38 at the end. Each of the proJectlons 38 has two converging side~ 40 which appear a8 sides of a triangle in Figure 4a. The converging sides 40 come into contact with the 30 edges 42 of the metal liner 24 posltloned ln the channels 26 ~` o~ the connector 20. The surfaces of the converging sides 40 are plated with material such as electroless nickel 44 which prevent oxldation and to which solder adheres easlly (wets).
, -4-,;
~ -. .
The remalning ~urfaces of the iron 32, includlng the non-converging sides o~ the proJections are plated with materlal such as hard chrome 46 which also prevents oxidatlon but is not wet by solder.
Accordlng to the results Or experlments uslng the iron 32 of the above structure, the best soldering results were ob-tained when the angleO formed by the two converging sides 40 o~ a pro~ectlon 38 was 80 degrees when the metal liners 24 were arranged ln the insulating material 48 at lntervals "d"
10 oP o.8 mm, and the length "a" of the metal llner was 5.5mm, the wldth "b" was 1.4mm, and the helght "c" was l.Omm. The conductor of the stripped wlre 22 had an outer dlameter of 0.5mm.
Bad soldering resulted due to delayed heat conductlon when the angle ~3 was smal and the converglng sldes 40 Or the proJections 38 were no longer ln contact wlth the edges 42 Or the metal llners 24. Also, it was found that as the angle e was gradually made larger the solderlng results became gradually wor~e. However, the results were satlsfactory for practical 20 use a8 long as molten solder 50 (as shown in Flgure 5) whlch adhered to the surfaoe near the base 52 of the converglng sldes dld not get too close and burn the lnsulating materlal 48 be-tween the metal line rs 24.
The li~e of the iron 32 wlth pro~ections 38 having con-verging sldes 40 18 also longer than for the iron 30 wlth rec-tangular pro~ect~on~ 32. The material stock used f`or the iron was a copper plate wlth a thlckness of 4mm, the heatlng tem-perature was 300C, and the solder was a stick solder (wlth a core o~ actlvated flux made Or 60% tln and 40,~ lead. The thl¢k-3o ness Or the electroless nickel plating was 401l and the thlcknessOr the hard chrome plating was 301l.
, ...
Although the reasons for the superiorlty Or the iron `--wlth pro~ectlons as in our design over the iron wlth rectangular ' 5 ; _ _ .~
---` 1046861 proJectlons are not qulte clear, the ~ollowing has been de-duced. When, as shown ln Flgure 6, the lron 32 presses inl-tially (posltion indicated by the solid line in the figure) on the solder 28 which ls laid over the metal liners 24, the tips 54 o~ the pro~ectlons 38 flrst ~tart to melt and cut lnto the solder. As the pro~ections 38 proceed, the converglng sldes 40 gradually enter lnto and melt the solder 28 as in-dicated ln Figure 4 by means of broken lines alternatlng wlth single dashes. Therefore, the ~ull length oP the solder i8 10 melted and it adheres to the ~ull length of the converglng sldes 40 evenly. Slnce the surfaces of the converging sldes 40 are plated wlth electroless nickel 44 whlch ls wet easily by solder, and the rest o~ the lron ls plated wlth hard chrome platlng whlch ls not wet easily by solder, the solder adheres to the slanted sldes evenly and well.
When the converging sides 40 make contact with the edges 42 of the metal llners 24 as lndlcated ln Figure 6 by means of broken llnes alternatlng wlth double dashes, the metal liners 24 which have small heat capacity compared to the con-20 ductors of the strlpped wlres 22 are heated rapldly. As thetemperature of the metal liners rises, the solder adhering to the converging sldes 40 slldes down along the converglng sldes , . .
40 and runs lnto each metal llner 24 ln even quantities. Thu~
the conductors of strlpped wires 22 become surrounded by the solder and by appllcation of heat the soldering is accomplished.
On the other hand, in the case o~ the iron 30 wlth rectangular pro~ections 33, the lron 30 makes contact with the solder mainly at the termlnal planes 56 o~ the rectangular pro~ectlons 33 as shown in Figure 7. Moreover, the vertical ~ 30 8ides 58 of the rectangular pro~ections cut into the solder ,;; perpendicular to its alignment, so that only a vertlcal cross-.~.$ section o~ the solder comes lnto contact with the iron. There-.;l fore, the solder is heated only locally and not throughout lts ~;~
. .
1046~61 total length as is the ca~e with the iron 32 wlth triangular proJections 38. Such local heating result~ in small amounts Or solder adhering to the proJectlons 33 and therefore only small amounts of solder flows around the wires 22. Accordingly, wasted solder 18 left on the metal liners after solderlng.
Although quantities of solder adhere to the termlnal planes 56 Or the iron 30 with rectangular pro~ectlons 33, the flow of this solder onto the wires 22 is not good because Or the horizontal posltlons of the termlnal plane.
In addltion, the flow Or solder onto the wires 22 is greatly lnfluenced by the surface conditions of the termlnal planes 56 and of the wlres 22 thus resultlng ln uneven quantl-tles Or solder rlow. Therefore, even and rellable soldering i~
dlfflcult. A1BO~ the solder accumulates on the iron wlth re-peated soldering and thls accumulated solder flow~ suddenly onto the wlres when the accumulatlon has exceeded a certaln amount. Thls makes the solderlng Or uniform quallty dlfflcult.
In addltlon to pro~ectlons 38 having converging sldes 40 formlng a trlangle, other embodlments wlthln the scope Or 20 the lnventlon can utilize converglng sides which are curved as shown ln Figure 8 (A and B).
Also, ln a case ln whiah the intervals between the -,' metal liners are large, planar ~paces 60 can be provlded between the pro3ectlons as shown lnFigure 9(C). In thls case, however, lt 1B deslred that solder not adhere to the rlat sectlons. A
structure wlth gutters 62 at the base Or the pro~ections as in Figure 9(D) 18 al~o posslble.
Although ln the experlmental example (outllned ln de.tall previously) only the converglng sides of the pro~ectlons 3 were plated wlth electrole~s nlckel, lf solder ls not llkely ~ to adhere to the iron except on the con~erging sldes because ; o~ the shape Oe the iron (for example, when the iron is much thlcker than the ætrip of solder læ wlde), then the entlre proJectlon 38 can be plated wlth electrole3s nlckel 44 as shown in Figure 1~. The rest of the lron should be plated wlth hard chrome 46 to make the platlng process easler.
From the foregoing, it can be readily re~llzed that -thls lnventlon can assume varlous embodiments. Thus, it is to be understood that the lnventlon ls not limited to the speclfic embodlments descrlbed hereln, but is to be limited only by the appended clalms.
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EACK~RO~ND OF THE INVENTION
This lnventlon relates to soldering irons for solderlng wlres to a connector, partlcularly to a soldering iron ~or simultaneously soldering a plurallty o~ wlres to metal llners in channels of a connector.
In the past, various methods of hand solderlng have been adopted ~or connecting wires to multi-core connectors whlch are widely used in eleatronlc devlces. For example, in one mtthod the coverlngs o~ wlres are peeled of~ one by one and then the wires are applled and soldered one by one to each metal llner ln the connector. Another example 19 a method ln which wires (to which solder has already been applled) are placed in metal llners (to whlch solder has been applled) and each wlre 1B soldered one at a tlme to the lnslde of lts encompassing liner by melting the previously applled solder wlth a solderlng lron. These methods are lnefflclent and requlre great sklll ln order to accompllsh rellable and neat solderlng.
A wlre posltloning device re¢ently came into use whlch posltlons the connecting wires parallel and at the proper dls-20 tances apart ao as to match the corresponding metal liners inthe multl-core connector. T'ne wlre posltioning device auto-matlcally cuts the wlres, strlps of~ the wire coverings, and places the stripped conductor of the wlres into each metal llner, thus sharply reduclng the palnstaklng nature o~ the work at the tlme of soldering. However, the wlres whlch have been automatl-cally strlpped and posltloned by the wlre posltlonlng device must stlll be hand-soldered one at a time to the metal llners.
~,:
Such hand solderlng lacks efflclency and uni~orm hlgh quallty.
SUMMARY OF ~HE INVENTION
It ls an ob~ect of the inventlon to provide a solderlng ron whlch can automatlcally and slmultaneously solder a plur-ality o~ wires to metal l~ners ln respectlve channels ln a con-nector Accordlng to the inventlon, a plate o~ heat conductlng material is provided with a plurality of projections on an end face, The projections are spaced to correspond to the spacing of the metal liners in the channels of the connector, The sides of each of the projections converge toward the extremity of the projection, The projections are dimensioned so that their ex-tremities can be positioned within the metal lined channels so that their converging sides contact respective edges of the metal liners. Thus, the soldering iron can conduct heat to solder the wires placed within the channels to the corresponding metal liners.
The converging sides of the projections are plated with material which prevents oxidation and causes the solder to wet the converg-ing sides, and the surfaces of the plate other than the converging sides are plated with a second material to prevent oxidation and to prevent wetting by the solder.
BRIEF DESCRI~TION OF THE DRAWINGS
The invention will now be described in detail with ref-' erence to the accompanying drawings representing preferred em-bodiments of the soldering iron according to the present invention.
~ , ~
In the drawings:
Fig, 1 is a partial side view of a known wire position~
~ ing device suitable for use with the soldering iron of the invention;
,` Fig, 2 is a top view of wires positioned in a connector by means of the wire positioning device shown in Figo l;
Fig, 3 is a partial cross-sectional end view of a sold-ering iron having rectangular projections which is shown for com-parison with the soldering iron of this invention;
Figs. 4a and 4b shownpartial cross-sections in an end view and a side view, respectively, of a soldering iron according to the invention;
- 30 Fig. 5 is a partial cross-sectional end view of one , embodiment of the soldering iron of this invention;
`; Fig. 6 is a partial cross-sectional end view showing , ~ ~ -2-.~
:
104686~
the use of the soldring iron of this invention;
Fig, 7 is a partial cross-sectional end view of the ' ,~','~ ' ~' .~ .
, .. ~: .
~s -2a-,~,..:
04686~
~olderlng lron of Figure 3 havlng rectangular pro~ectlons;
Flg. 8 is a slde view oP two diPferent conPigurations A and B, of pro~ectlons havlng curved sides according to embodl-ments of the invention;
Flg. 9 18 a slde view of two different configurations, C and D, of spaced apart pro~ectlons accordlng to embodlments Or thls lnventlon; and Fig. 10 ls a partial ~lde vlew of a solderlng iron showing its plated surfaces accordlng to an embodlment of this 10 lnvention .
DESCRIPTION OF THE PREFEMED EMBODIMENq~S
The soldering lron of this lnventlon can be used wlth a known wire posltlonlng devlce 2 such as shown ln Flgure 1.
In thi~ devlce, a multi-wlre cord 4 18 attached to a positlonlng stand 6, and each indivldual wire 8 18 inserted lnto a groove o~ ~-an allgnment ~lg 10 whlch has grooves at lntervals correspond-lng to the intervals at whlch the wires wlll be ~olned to a connector. The ends of the wlres are held by a wlre holder 12.
In thls fashlon, the wlres are llned up and held. Then a cut- -20 tlng blade 14 and a strlpplng blade 16 are automatlcally lowered `-onto a recelvlng stand 18. The wlres 8 are cut at locatlon 9, and at locatlon 11 the strlpplng blade 16 cuts lnto the wlre coverings. With the stripplng blade 16 still lowered, the po~ltlonlng stand 6 is moved and the wire coverings are pulled ofP by the strlpping blade.
Next, the cutting blade 14, the stripping blade 16J the allgnment ~lg 10 and the recelving stand 18 are moved out of the way. Then, a connector 20 18 automatlcally posltloned and the positloning stand 6 18 returned to ltQ orlglnal po~ltlon 80 30 that the conductors of the strlpped wires 22 are applied to the ~- connec'cor 20 as shown ln Flgure 2. Thus the operations needed - for the connection of wires 8 to the connector 20 are greatly reduced by use of the wlre po~ltlonlng device 2.
10~6861 - ~ -However, the solderlng of the wlres to the connector ls ~till done by hand, and therefore the process is still ineffl-clent and uniformly soldered ~oints are difflcult to obtain.
Consequently, a soldering iron i8 needed which solders these multiple wires automatically and simul~aneously. Figure 3 shows a proposed automatic soldering iron which was not completely satisfactory, and is described for comparlson and better under-standing of the soldering iron of this invention. A~ shown ln Figure 3, conductors o~ the stripped wires 22 are placed ln 10 metal liners 24 ln channels 26 in the connector 20, and solder 28 is placed over the top of the liners 24. The soldering iron 30 has rectangular shaped pro~ections 33 at intervals corres-ponding with the metal llners 24, and these proJections 33 are of such wldth and length that they can be lowered into the metal llners. This soldering iron 30 is lowered automatically onto the solder 28 and melts the solder thus attaching the wlres 8 to the metal liners 24 of the connector 20 simultaneou~ly and !.. ~ automatically. However, a solderlng iron of such a structure has shortcomings. For example, the amounts of solder getting lnto the metal liners are not only small but also not unlform.
In the worst cases, some metal lineræ get little solder, thus maklng rellable soldering difficult. Also, the life of the soldering lron is short and quite unsatisfactory.
Figures 4a and 4b show the front vlew and the side vlew of a section of the lron of the present lnventlon. The lron 32 ls a plate 34 whlch has a heating section 36 and pro-~ections 38 at the end. Each of the proJectlons 38 has two converging side~ 40 which appear a8 sides of a triangle in Figure 4a. The converging sides 40 come into contact with the 30 edges 42 of the metal liner 24 posltloned ln the channels 26 ~` o~ the connector 20. The surfaces of the converging sides 40 are plated with material such as electroless nickel 44 which prevent oxldation and to which solder adheres easlly (wets).
, -4-,;
~ -. .
The remalning ~urfaces of the iron 32, includlng the non-converging sides o~ the proJections are plated with materlal such as hard chrome 46 which also prevents oxidatlon but is not wet by solder.
Accordlng to the results Or experlments uslng the iron 32 of the above structure, the best soldering results were ob-tained when the angleO formed by the two converging sides 40 o~ a pro~ectlon 38 was 80 degrees when the metal liners 24 were arranged ln the insulating material 48 at lntervals "d"
10 oP o.8 mm, and the length "a" of the metal llner was 5.5mm, the wldth "b" was 1.4mm, and the helght "c" was l.Omm. The conductor of the stripped wlre 22 had an outer dlameter of 0.5mm.
Bad soldering resulted due to delayed heat conductlon when the angle ~3 was smal and the converglng sldes 40 Or the proJections 38 were no longer ln contact wlth the edges 42 Or the metal llners 24. Also, it was found that as the angle e was gradually made larger the solderlng results became gradually wor~e. However, the results were satlsfactory for practical 20 use a8 long as molten solder 50 (as shown in Flgure 5) whlch adhered to the surfaoe near the base 52 of the converglng sldes dld not get too close and burn the lnsulating materlal 48 be-tween the metal line rs 24.
The li~e of the iron 32 wlth pro~ections 38 having con-verging sldes 40 18 also longer than for the iron 30 wlth rec-tangular pro~ect~on~ 32. The material stock used f`or the iron was a copper plate wlth a thlckness of 4mm, the heatlng tem-perature was 300C, and the solder was a stick solder (wlth a core o~ actlvated flux made Or 60% tln and 40,~ lead. The thl¢k-3o ness Or the electroless nickel plating was 401l and the thlcknessOr the hard chrome plating was 301l.
, ...
Although the reasons for the superiorlty Or the iron `--wlth pro~ectlons as in our design over the iron wlth rectangular ' 5 ; _ _ .~
---` 1046861 proJectlons are not qulte clear, the ~ollowing has been de-duced. When, as shown ln Flgure 6, the lron 32 presses inl-tially (posltion indicated by the solid line in the figure) on the solder 28 which ls laid over the metal liners 24, the tips 54 o~ the pro~ectlons 38 flrst ~tart to melt and cut lnto the solder. As the pro~ections 38 proceed, the converglng sldes 40 gradually enter lnto and melt the solder 28 as in-dicated ln Figure 4 by means of broken lines alternatlng wlth single dashes. Therefore, the ~ull length oP the solder i8 10 melted and it adheres to the ~ull length of the converglng sldes 40 evenly. Slnce the surfaces of the converging sldes 40 are plated wlth electroless nickel 44 whlch ls wet easily by solder, and the rest o~ the lron ls plated wlth hard chrome platlng whlch ls not wet easily by solder, the solder adheres to the slanted sldes evenly and well.
When the converging sides 40 make contact with the edges 42 of the metal llners 24 as lndlcated ln Figure 6 by means of broken llnes alternatlng wlth double dashes, the metal liners 24 which have small heat capacity compared to the con-20 ductors of the strlpped wlres 22 are heated rapldly. As thetemperature of the metal liners rises, the solder adhering to the converging sldes 40 slldes down along the converglng sldes , . .
40 and runs lnto each metal llner 24 ln even quantities. Thu~
the conductors of strlpped wires 22 become surrounded by the solder and by appllcation of heat the soldering is accomplished.
On the other hand, in the case o~ the iron 30 wlth rectangular pro~ections 33, the lron 30 makes contact with the solder mainly at the termlnal planes 56 o~ the rectangular pro~ectlons 33 as shown in Figure 7. Moreover, the vertical ~ 30 8ides 58 of the rectangular pro~ections cut into the solder ,;; perpendicular to its alignment, so that only a vertlcal cross-.~.$ section o~ the solder comes lnto contact with the iron. There-.;l fore, the solder is heated only locally and not throughout lts ~;~
. .
1046~61 total length as is the ca~e with the iron 32 wlth triangular proJections 38. Such local heating result~ in small amounts Or solder adhering to the proJectlons 33 and therefore only small amounts of solder flows around the wires 22. Accordingly, wasted solder 18 left on the metal liners after solderlng.
Although quantities of solder adhere to the termlnal planes 56 Or the iron 30 with rectangular pro~ectlons 33, the flow of this solder onto the wires 22 is not good because Or the horizontal posltlons of the termlnal plane.
In addltion, the flow Or solder onto the wires 22 is greatly lnfluenced by the surface conditions of the termlnal planes 56 and of the wlres 22 thus resultlng ln uneven quantl-tles Or solder rlow. Therefore, even and rellable soldering i~
dlfflcult. A1BO~ the solder accumulates on the iron wlth re-peated soldering and thls accumulated solder flow~ suddenly onto the wlres when the accumulatlon has exceeded a certaln amount. Thls makes the solderlng Or uniform quallty dlfflcult.
In addltlon to pro~ectlons 38 having converging sldes 40 formlng a trlangle, other embodlments wlthln the scope Or 20 the lnventlon can utilize converglng sides which are curved as shown ln Figure 8 (A and B).
Also, ln a case ln whiah the intervals between the -,' metal liners are large, planar ~paces 60 can be provlded between the pro3ectlons as shown lnFigure 9(C). In thls case, however, lt 1B deslred that solder not adhere to the rlat sectlons. A
structure wlth gutters 62 at the base Or the pro~ections as in Figure 9(D) 18 al~o posslble.
Although ln the experlmental example (outllned ln de.tall previously) only the converglng sides of the pro~ectlons 3 were plated wlth electrole~s nlckel, lf solder ls not llkely ~ to adhere to the iron except on the con~erging sldes because ; o~ the shape Oe the iron (for example, when the iron is much thlcker than the ætrip of solder læ wlde), then the entlre proJectlon 38 can be plated wlth electrole3s nlckel 44 as shown in Figure 1~. The rest of the lron should be plated wlth hard chrome 46 to make the platlng process easler.
From the foregoing, it can be readily re~llzed that -thls lnventlon can assume varlous embodiments. Thus, it is to be understood that the lnventlon ls not limited to the speclfic embodlments descrlbed hereln, but is to be limited only by the appended clalms.
, .
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. .
Claims (7)
1. An iron for soldering a plurality of conductors to metal liners in respective channels of a connector, said iron comprising: a plate of heat conducting material; a plu-rality of projections on an end face of said plate, spaced to correspond to the spacing of the metal liners in the channels, the sides of each of said projections converging toward the extremities of the corresponding projection and plated with a material to prevent oxidation and to cause the solder to wet said sides; the surfaces of said plate other than said conver-ging sides plated with a second material to prevent oxidation and to prevent wetting by the solder; said projections being dimensioned so that each said extremities can be positioned within its corresponding channel with said converging sides in contact with respective edges of the metal liner, whereby heat is conducted by said iron to solder conductors placed within the channels to the metal liners.
2. The iron as claimed in Claim 1, wherein said first-mentioned plated material comprises electroless nickel, and said second material comprises hard chrome.
3. The iron as claimed in Claim 1, wherein said pro-jections are triangular in cross-section, the angle formed by said converging sides at said extremities being 80°.
4. The iron as claimed in Claim 1, wherein said pro-jections are sinusoidal in cross-section.
5. The iron as claimed in Claim 1, wherein said extremity is round, said converging sides being rounded and blending into said extremity.
6. The iron as claimed in Claim 1, wherein said pro-jections are spaced apart from each other.
7. The iron as claimed in Claim 6, including a channel between said spaced apart projections, whereby the flow of heat from the iron to the portions of the connector between the channels is reduced.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1044674U JPS5316602Y2 (en) | 1974-01-25 | 1974-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1046861A true CA1046861A (en) | 1979-01-23 |
Family
ID=11750364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA218,240A Expired CA1046861A (en) | 1974-01-25 | 1975-01-20 | Soldering iron for soldering a plurality of wires to a connector |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5316602Y2 (en) |
| CA (1) | CA1046861A (en) |
| DE (1) | DE2501807A1 (en) |
| FR (1) | FR2258928A1 (en) |
| GB (1) | GB1499678A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1556036A (en) * | 1975-10-30 | 1979-11-21 | Yazaki Corp | Process and apparatus for producing a wire-harness |
| GB1511700A (en) * | 1975-12-23 | 1978-05-24 | Rosemount Eng Co Ltd | Apparatus and method for welding electrical wire or cable |
| JPS5610462Y2 (en) * | 1976-03-19 | 1981-03-09 | ||
| JPS5610463Y2 (en) * | 1976-03-19 | 1981-03-09 | ||
| FR2439322A1 (en) * | 1978-10-19 | 1980-05-16 | Cii Honeywell Bull | METHOD AND DEVICE FOR CONNECTING TWO ELEMENTS AND TOOL FOR EXECUTING THE PROCESS |
| DE2910066C2 (en) * | 1979-03-14 | 1984-03-29 | Siemens AG, 1000 Berlin und 8000 München | Device for reflow soldering of multi-pole plug connections |
| US10868401B1 (en) * | 2020-03-04 | 2020-12-15 | Onanon, Inc. | Robotic wire termination system |
| CN113020748B (en) * | 2021-03-17 | 2023-02-28 | 北京航星机器制造有限公司 | Bent type lead fixing device and lead welding alignment method |
| CN113078529B (en) * | 2021-03-25 | 2022-05-13 | 中航光电科技股份有限公司 | Automatic welding structure of high-speed backplane connector |
-
1974
- 1974-01-25 JP JP1044674U patent/JPS5316602Y2/ja not_active Expired
-
1975
- 1975-01-14 GB GB156875A patent/GB1499678A/en not_active Expired
- 1975-01-17 DE DE19752501807 patent/DE2501807A1/en not_active Withdrawn
- 1975-01-20 CA CA218,240A patent/CA1046861A/en not_active Expired
- 1975-01-24 FR FR7502315A patent/FR2258928A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2258928A1 (en) | 1975-08-22 |
| DE2501807A1 (en) | 1975-07-31 |
| JPS50106677U (en) | 1975-09-02 |
| JPS5316602Y2 (en) | 1978-05-02 |
| GB1499678A (en) | 1978-02-01 |
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