CN113001079A - Pre-assembling clamp and application thereof, welding method and welding part - Google Patents
Pre-assembling clamp and application thereof, welding method and welding part Download PDFInfo
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- CN113001079A CN113001079A CN201911328461.0A CN201911328461A CN113001079A CN 113001079 A CN113001079 A CN 113001079A CN 201911328461 A CN201911328461 A CN 201911328461A CN 113001079 A CN113001079 A CN 113001079A
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- 238000003466 welding Methods 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 53
- 229910000679 solder Inorganic materials 0.000 claims description 76
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005476 soldering Methods 0.000 claims description 21
- 230000005674 electromagnetic induction Effects 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000002654 heat shrinkable material Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 10
- 230000002349 favourable effect Effects 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000002955 isolation Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000002500 effect on skin Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
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- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/06—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for positioning the molten material, e.g. confining it to a desired area
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/32—Wires
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention relates to the field of cable processing, and provides a method for welding a cable and a cable interface. The welding method greatly improves the butt joint accuracy of the pins and the core wires, reduces the occurrence probability of short circuit between the core wires and is beneficial to reducing the labor intensity of operators. The welding method is simple in operation steps and short in time consumption, provides a foundation for realizing automatic welding of the plurality of pins and the corresponding core wires, and creates favorable conditions for improving the welding efficiency of the pins and the core wires. In addition, the pre-installation clamp can effectively protect welding parts of the pins and the core wires, so that the connection reliability of the pins and the core wires can be improved, and the service life of a welding part product of a cable and cable interface is prolonged.
Description
Technical Field
The invention relates to the field of cable processing, in particular to a preassembly fixture, application of the preassembly fixture, a welding piece and a welding method.
Background
In the prior art, a method for welding a cable with a plurality of pins and a cable interface comprises the following steps: 1. manually sleeving a heat-shrinkable tube on each core wire; 2. arranging a plurality of core wires in the cable at corresponding pins of the cable interface one by one; 3. welding the joints of the core wires and the cable interfaces one by one; 4. and then the heat shrinkable tube is pushed to the joint (welding part) one by one, so that the joint is wrapped in the heat shrinkable tube, the insulation isolation among the welding parts is realized, and the short circuit is avoided. The welding method of the prior art has the following defects: the operation steps are complicated and the time consumption is long.
Disclosure of Invention
The invention provides a preassembly clamp, application thereof and a method for welding a core wire and a cable interface, which aim to solve the problems of complicated operation steps and long time consumption of the method for welding the core wire and the cable interface in the prior art.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention provides a pre-installation clamp for a cable and cable interface, which comprises a plurality of channels penetrating through the pre-installation clamp, wherein two ends of each channel respectively form two opening parts with the surface of the pre-installation clamp.
Preferably, all of said channels are arranged in isolation from each other.
Preferably, the pre-clamp is made of a non-metallic material.
Preferably, the channel is a straight channel.
Preferably, all of said channels are arranged parallel to each other.
Preferably, the pre-clamp is made of a heat shrink material.
The invention also provides a welding method of the cable and the cable interface, which adopts the preassembly clamp; the cable comprises a plurality of core wires; the cable interface comprises a plurality of pins, wherein the pins are used for welding with the core wires; the number of the core wires, the number of the pins and the number of the channels are equal; the welding method comprises the following steps:
a preassembling step, wherein all core wires and all pins are arranged in a preassembling fixture, so that each pin and one core wire are oppositely arranged in one channel;
and a welding step, wherein in each channel, the core wire and the pin are fixed and electrically connected in a hot melting solder mode.
Preferably, the welding step specifically comprises: in each channel, the solder is heated to form a molten state, the core wire and the pin are electrically connected by the molten solder, and then the molten solder is cooled to fix the core wire and the pin.
Preferably, the welding step specifically comprises: and simultaneously welding the core wires and the pins in all the channels in a hot-melting solder mode, so that each pin is fixed with the corresponding core wire and electrically connected.
Preferably, the pre-assembling step specifically comprises: all core wires are arranged in the preassembly fixture, all pins are arranged in the preassembly fixture, and each pin and one core wire are oppositely arranged in one channel.
Preferably, the arrangement of all the channels corresponds to the arrangement of the pins; the pre-assembling step specifically comprises: according to the arrangement of the channels, all the core wires are respectively inserted from one opening part of the corresponding channel, each pin is respectively inserted from the other opening part of the corresponding channel, and each pin and one core wire are oppositely arranged in one channel.
Preferably, before the pre-assembling step, the method further comprises: and arranging solder, namely arranging the solder on the core wire and/or the pin.
Preferably, the step of disposing solder specifically comprises: solder is dipped on the core wire and/or the leads.
Preferably, the pre-assembling step specifically comprises: disposing all of the cores and all of the pins in a pre-assembly fixture such that each pin is disposed in a channel opposite a core; the core wires in the same channel are in line contact or surface contact with the pins.
Preferably, the "solder" in the soldering step is specifically a solder.
Preferably, in the soldering step, the "manner of hot melting the solder" is to heat melt the solder by electromagnetic induction heating.
Preferably, the core wire is an insulated core wire; before the pre-loading step, the method further comprises the following steps: and removing the insulating layer, namely removing part of the insulating layer of the insulating core wire.
Preferably, the cable is a multi-core cable; before the step of removing the insulating layer, the method further comprises the following steps: and a peeling step, namely removing part of the insulating sheath of the multi-core cable and exposing all the insulating core wires.
The invention also provides a welding piece which comprises a cable interface, a plurality of core wires and a preassembly clamp;
the cable interface comprises a plurality of pins;
the pre-assembling clamp comprises a plurality of channels penetrating through the pre-assembling clamp, and two ends of each channel respectively form two opening parts with the surface of the pre-assembling clamp;
the number of the core wires, the number of the pins and the number of the channels are equal;
inside each of the channels, one of the cores and one of the pins are fixed by welding.
The invention also provides the application of the preassembly fixture, which adopts the preassembly fixture; the preassembly fixture is used for installing cables and cable interfaces.
The invention has the advantages or beneficial effects that:
the welding method of the cable and the cable interface greatly improves the butt joint accuracy of the pins and the core wires, is beneficial to reducing the labor intensity of operators, solves the problem that the heat shrinkable tube cannot be directly wrapped outside the joint due to the large welding spot at the joint in the prior art and is beneficial to reducing the occurrence probability of short circuit between the core wires. The welding method is simple in operation steps and short in time consumption, provides a foundation for realizing automatic welding of the plurality of pins and the corresponding core wires, and provides favorable conditions for improving the welding efficiency of the pins and the core wires. In addition, the pre-installation clamp can effectively protect welding parts of the pins and the core wires, so that the connection reliability of the pins and the core wires can be improved, and the service life of a welding part product of a cable and cable interface is prolonged.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic perspective view of a prismatic pre-assembly jig according to example 1 of the present invention;
FIG. 2 is a schematic perspective view of a cylindrical pre-assembly jig provided in example 1 of the present invention;
FIG. 3 is a schematic structural diagram of a cable, a cable port and a pre-assembly fixture before a pre-assembly step according to embodiment 2 of the present invention;
FIG. 4 is a schematic view of an apparatus for welding a core wire to a cable interface using a prismatic pre-clamping apparatus according to example 2 of the present invention;
fig. 5 is a schematic perspective view of a weld part in embodiment 3 of the present invention.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.
In the prior art, a method for welding a cable interface with a plurality of pins and a cable comprises the following steps: 1. manually sleeving a heat shrinkable tube on each core wire of the cable; 2. arranging each core wire at the corresponding pin of the cable interface one by one; 3. welding the joints of the core wires and the cable interfaces one by one; 4. and then the heat shrink tube is pushed to the welding part one by one, so that the welding part is wrapped in the heat shrink tube, the insulation isolation among the welding parts is realized, and the short circuit is avoided.
Example 1
In order to solve the problems of complex operation and long time consumption when a heat shrinkable tube in the prior art is used for welding a cable interface with a plurality of pins and a cable, the invention provides a preassembly fixture 1 for the cable and the cable interface, as shown in fig. 1 and fig. 2, comprising a plurality of channels 11 penetrating through the preassembly fixture 1, wherein two ends of the channels 11 respectively form two mouth parts 1101 and 1102 with the surface of the preassembly fixture 1. Therein, the two mouths 1101 and 1102 of the channel 11 are used for respectively inserting a cable and inserting a corresponding pin of a cable interface.
The preassembly fixture 1 provided in this embodiment utilizes the partition parts naturally formed between the channels 11 of the preassembly fixture 1 to replace the heat shrink tube in the prior art, thereby realizing the insulation and isolation of the welding parts. When the preassembly fixture 1 is applied to welding a plurality of groups of pins and core wires, only the following steps are required to be executed:
1. arranging all core wires and all pins in a preassembly fixture 1, such that one core wire and one pin are arranged in each channel 11;
2. within each channel 11, the core is electrically connected to the leads by means of hot-melt solder.
Compared with the prior art in which a mode that a plurality of heat shrinkable tubes are welded one by one is adopted, the time consumed for inserting the core wires into the preassembly fixture 1 one by one through the opening part 1101 is basically equivalent to the time consumed for arranging the core wires at the corresponding pins of the cable interface one by one in the prior art; the arrangement of the pins of the cable interface in all channels 11 of the pre-assembly fixture 1 is very easy to implement, and can be usually implemented by one-step plugging. Therefore, it takes a short time to place several pins of the cable interface inside all the channels 11 of the pre-clamp 1, much less than "placing each core wire one by one at the corresponding pin of the cable interface". Therefore, the preassembly fixture 1 of the embodiment 1 saves the time for sleeving the heat shrinkable tubes one by one and pushing the heat shrinkable tubes one by one, simplifies the operation steps and saves the total time consumption of the whole welding process; meanwhile, the labor intensity of operators is reduced.
On the other hand, among the prior art, use that the pyrocondensation pipe appears easily because the size of weld part is great, has exceeded the both ends open-ended size of pyrocondensation pipe even, make unable direct pyrocondensation pipe parcel in the outside problem of junction, or because the interval of each pin is less, but weld part size is great, the problem of the short circuit between each weld part that causes, preassemble anchor clamps 1 that adopt this embodiment to provide is owing to having carried out the interval through preassemble anchor clamps 1 with each weld part in advance, and limit the weld part in the inside of passageway 11, can avoid above-mentioned technical problem from the source, welded yields has been improved. On the other hand, the size consistency of all welding parts is also facilitated, and therefore favorable conditions are created for improving the signal transmission quality between the cables and the cable interfaces.
In order to reduce the difficulty of placing the core wire and the pins due to the partial communication between the channels 11, preferably, all the channels 11 are arranged in an isolated manner, so that the difficulty of placing the core wire and the pins due to the partial communication between the channels 11 is further reduced, the probability of occurrence of butt joint errors of the core wire and the pins is favorably reduced, and meanwhile, the mutual isolation state of the welding parts can be further ensured.
For good insulation of the respective weld, the preassembly jig 1 is preferably made of a non-metallic material, as shown in fig. 1 and 2. After the pins and the corresponding core wires are welded, each welding part is in an exposed state, and the partition parts naturally formed between the channels 11 by the preassembly fixture 1 can play a role in physical isolation. The electrical insulation of the partition (partition of the pre-installation jig 1) is important to achieve good insulation between the core wire and the soldering portion of the lead. In order to achieve a good electrical insulation effect, the pre-assembly fixture 1 may be made of a non-metallic material. On the other hand, the solder is hot-melted in an electromagnetic induction heating manner, which is beneficial to further improving the welding efficiency of the pre-assembly fixture for welding the core wire and the cable interface (see the embodiment 2 for details). When the solder is hot-melted in an electromagnetic induction heating mode, if the preassembly fixture 1 made of a metal material is adopted, the preassembly fixture forms a metal cover body, the solder is positioned in the metal cover body (the preassembly fixture 1), in an alternating magnetic field, due to the skin effect of high-frequency current, the generated heat is mainly concentrated on the surface of the preassembly fixture 1 instead of the surface of the solder in the channel 11, and then the solder in the channel 11 is melted to cause adverse effect, so that the welding of a core wire and a pin is adversely affected, and if the preassembly fixture 1 is made of a non-metal material, the skin effect can be well prevented from acting on the surface of the preassembly fixture 1, and the adverse effect caused by the melting of the solder is avoided.
To facilitate rapid interfacing of the core with the pins, the channel 11 is preferably a straight channel, as shown in fig. 1 and 2. Because the core wire has certain flexibility, when the core wire is placed in the channel 11, the core wire is easy to bend, so that the core wire is difficult to move in the channel 11 of the preassembly fixture 1, and the core wire cannot be normally butted with the pins. Therefore, the channel 11 is set to be a straight channel, so that the core wire can smoothly extend into the channel 11, the butt joint difficulty of the core wire and the pins is reduced to a certain extent, and favorable conditions are created for the quick butt joint of the core wire and the pins.
In order to save installation time of the cable interface on the pre-clamp, all channels 11 are preferably arranged parallel to each other, as shown in fig. 1 and 2. In the prior art, for convenience of use, most of the pins of the cable interface are arranged in a regular array, and the pins are arranged in parallel. In this embodiment, all the channels 11 are arranged in parallel to each other, so that the distribution of the channels on the pre-assembly fixture 1 is better adapted to the general cable interface, and the pins can be quickly and correspondingly inserted into the channels 11 of the pre-assembly fixture 1 one by one, thereby greatly saving the installation time of the cable interface on the pre-assembly fixture 1. The pre-assembly fixture 1 includes, but is not limited to, a trapezoidal prism (as shown in fig. 1) or a cylinder (as shown in fig. 2), and the shape of the pre-assembly fixture and the arrangement of the channels are designed according to the type of the cable interface, so that all the pins are simultaneously inserted into the corresponding channels 11 of the pre-assembly fixture 1.
In order to more reliably secure the several wires and the cable interface, the pre-clamp 1 is preferably made of a heat-shrinkable material. After the pins and the core wires are welded, the pins, the core wires and the channels 11 are in clearance fit in any channel 11, so that the possibility of relative movement exists between a welded part product formed by the core wires and the pins and the channels 11, and even the welded part of the welded part product is separated from the channels 11, namely the welded part is exposed outside the preassembly fixture 1, and at this time, the preassembly fixture 1 cannot protect and insulate the externally exposed welded part. The preassembly fixture 1 made of the thermal shrinkage material can be used for welding the pins and the core wires, meanwhile, the preassembly fixture 1 is subjected to heat conducted by the solder to shrink and deform, the size of the channel 11 is reduced, and the pins and the core wires can be tightly wrapped in the channel until the pins and the core wires can be tightly wrapped, so that the pins, the core wires and welding parts of the pins and the core wires are tightly connected with the preassembly fixture 1, and therefore the core wires and the cable interfaces are more reliably fixed. On the other hand, the preassembly fixture made of the thermal shrinkage material is beneficial to prolonging the service life of a produced welding part product.
The invention provides the application of a pre-installed clamp, which adopts the pre-installed clamp; the pre-assembly jig is used for installation of cables and cable interfaces.
Example 2
The welding method of the cable and the cable interface in the prior art has the technical defects of complicated operation steps and long time consumption, and aiming at the technical defects, the invention provides the welding method of the cable and the cable interface, which adopts the preassembly clamp 1 provided by the embodiment 1; the cable comprises a plurality of core wires 3; the cable interface 2 comprises a plurality of pins 21, wherein the pins 21 are used for welding with the core wires 3; the number of the core wires 3, the number of the pins 21 and the number of the channels 11 are equal; the welding method comprises the following steps:
1. a pre-assembling step of disposing all the cores 3 and all the leads in the pre-assembly jig 1 so that each of the leads 21 is disposed in one of the passages 11 to face one of the cores 3; wherein, before the preassembly step, the relative positions of all the leads 21 of all the core wires 3 and the preassembly fixture 1 are shown in fig. 3;
2. in the soldering step (as shown in fig. 4), the core wire 3 and the lead 21 are fixed and electrically connected by means of hot-melt solder in each of the passages 11.
The hot melting solder is prepared by the following specific modes: the solder is heated to be in a molten state, and the core wire 3 and the lead 21 are electrically connected by the solder in the molten state, and the solder in the molten state is cooled to fix the core wire 3 and the lead 21. Herein, "cooling the molten solder" includes, but is not limited to, natural cooling or artificial cooling. Wherein, special cooling technology can be adopted to the mode of artificial cooling to reach and save cooling consuming time, and then improve welding efficiency's effect, or reach the effect that increases the tensile strength of welding part.
Compared with the prior art in which a mode of welding a plurality of heat shrinkable tubes one by one is adopted, in the welding method of the embodiment, the time consumed for the core wires 3 to extend into the preassembly fixture 1 one by one through the opening part 1101 is basically equivalent to the time consumed for arranging each core wire at the corresponding pin of the cable interface one by one in the prior art; the plurality of pins 21 of the cable interface 2 are arranged inside all the channels 11 of the pre-assembly fixture 1, which is very easy to implement and can be usually realized by one-step plugging, so that the time consumption for arranging the plurality of pins 21 of the cable interface 2 inside all the channels 11 of the pre-assembly fixture 1 is shorter and much shorter than the time consumption for arranging each core wire at the corresponding pins of the cable interface one by one. Therefore, the preassembly fixture 1 of the embodiment 1 saves the time for sleeving the heat shrinkable tubes one by one and pushing the heat shrinkable tubes one by one, simplifies the operation steps and saves the total time consumption of the whole welding process; meanwhile, the labor intensity of operators is reduced.
On the other hand, in the prior art, the problem that the size of the welding part is difficult to control is easily generated by using the heat shrinkable tube. When the size of the welded portion is too large, it exceeds even the size of the openings at both ends of the heat shrinkable tube. At this time, the problem that the heat shrinkable tube cannot be directly wrapped outside the welding part, or the problem that the welding part is short-circuited due to the fact that the space between the pins 21 is small but the size of the welding part is large is solved. On the other hand, the size consistency of all welding parts is also facilitated, and therefore favorable conditions are created for improving the signal transmission quality of the cable and the cable interface.
In the method for welding the interface between the core wire and the cable provided in embodiment 2, the pin 21 and the core wire 3 are respectively inserted into the channels 11 at the two ends of the pre-assembly fixture 1 only according to the corresponding insertion positions of the pin 21 and the core wire 3, so that the pin 21 and the core wire 3 can be butted, and the accuracy of butting is greatly improved.
The method for welding the core wire and the cable interface, provided by the embodiment 2, adopts the pre-installation fixture 1 which is simple in structure, easy to process and convenient and fast to use, and can effectively protect the welding parts of the pins 21 and the core wire 3, so that the reliability of welding the pins 21 and the core wire 3 can be improved, and the service life of a welded part product can be prolonged. The welding method provides a foundation for realizing the automatic welding of the pin 21 and the core wire 3, and provides favorable conditions for improving the welding efficiency of the pin 21 and the core wire 3.
In order to further shorten the welding time and improve the welding efficiency, the welding steps are specifically as follows: the core wires 3 and the leads 21 in all the channels 11 are soldered simultaneously by means of hot-melt solder, so that each lead 21 is fixed and electrically connected with the corresponding core wire 3. After the pre-assembly step is completed, the solder in the channels 11 is heated by non-contact heating, and the solder in all the channels 11 is melted by heating from the outside of the pre-assembly jig 1 to realize the synchronous welding of the plurality of leads 21 and the plurality of core wires 3. Compared with a one-by-one welding mode, the welding time is reduced by multiple times, and the welding efficiency is further improved.
In order to facilitate the operation, the preassembly step specifically comprises the following steps: all the cores 3 are first placed in the preassembly jig 1 and all the pins 21 are then placed in the preassembly jig 1, each pin 21 being placed in one of the channels 11 opposite one of the cores 3. Compare and set up pin 21 in passageway 11 earlier, set up heart yearn 3 in the operation mode of passageway 11 again, reduced the operation degree of difficulty, it is more convenient to operate, is favorable to further shortening consuming time of pre-installation step.
In order to reduce the probability of misconnection of the core wire with the pins, it is preferable that the arrangement of all the channels 11 corresponds to the arrangement of the pins 21; the preassembly step specifically comprises: the core wires 3 are sorted according to the arrangement of the passages 11, and all the core wires 3 are inserted from one of the mouths 1101 of the corresponding passages 11, and each of the leads 21 is inserted from the other mouth 1102 of the corresponding passage 11, and each of the leads 21 is disposed in one of the passages 11 facing one of the core wires 3. Through sorting the core wires 3, the matching performance of the core wires 3 and the pins 21 is ensured, so that the wrong connection probability of the core wires 3 and the pins 21 can be obviously reduced, and the yield of welding products is improved. In order to make it possible to automate the production, for example by using a color recognition technique to recognize the color of the core wires 3, the core wires 3 of the corresponding color are inserted into the corresponding channels 11 of the pre-assembly jig 1 in conjunction with an automated device.
In order to simplify the operation steps of the welding method for the cable-to-cable interface, it is preferable that the method further comprises, before the pre-assembling step: and a solder setting step of setting solder on the core wire 3 and/or the lead 21. The solder step is provided in order to melt the solder on the core wire 3 and/or the lead 21 in the soldering step, thereby electrically connecting the core wire 3 and the lead 21. Compared with a solder setting mode of setting solder in the channel 11 of the preassembly fixture 1, the solder setting mode of setting the solder on the core wire 3 and/or the pins 21 in advance and then performing the preassembly step is simpler in operation steps, easy to implement and strong in operability, reduces the operation difficulty of solder setting, is beneficial to further shortening the welding time, and further improves the welding efficiency. Specific ways of "disposing solder on the core wire 3 and/or the lead 21" include, but are not limited to, disposing solder on the core wire 3 and/or the lead 21 by coating or dipping. Preferably, solder dipping is used. Compared with other solder setting modes, the mode of dipping the solder is simple to operate, high in operation speed and easy to realize automatic production.
In order to reduce the solder cost, it is preferable that the "solder" in the soldering step is specifically solder. The soldering tin has the following advantages compared with other soldering materials: easy to obtain and low in cost; the welding process is simple and controllable, the reliability is high, and the yield is high; the formed welding part is firm. The soldering tin is used as the solder, so that the soldering quality and the soldering yield can be improved; is beneficial to reducing the cost of the solder. Compared with other solders, the soldering tin can be better suitable for large-scale production. The solder may preferably be solder paste. Since the solder paste itself is in a jelly-like form, the core wire 3 or the lead 21 can be directly inserted into the solder paste, respectively.
In order to realize the rapid soldering of the lead and the core wire, it is preferable that the soldering step be performed by "hot-melting the solder" specifically by heating the solder by electromagnetic induction. Electromagnetic induction heating is performed by heating a conductor itself by an induced current (eddy current loss) generated by the conductor under the action of a high-frequency magnetic field and by the action of a magnetic field in the conductor (hysteresis loss). Principle of electromagnetic induction heating: when the conductor has current, a magnetic field is generated around the conductor; a high-frequency current flows to an inductance coil wound in a ring shape, thereby generating a strong magnetic beam with polarity changing instantaneously in the inductance coil; the heated low-melting-point solder is placed in the induction coil, the magnetic beam penetrates through the solder to be heated, and a large eddy current is generated on the surface of the solder in the direction opposite to the heating current due to the skin effect of the high-frequency current; joule heat is generated due to the internal resistance of the solder, so that the temperature of the solder rapidly rises to effect soldering of the lead 21 and the core wire 3.
Therefore, compared with other heating methods, the method for heating and melting the soldering tin by adopting the electromagnetic induction heating method has the following advantages: firstly, the electromagnetic induction heating has high heating speed, so that the welding time can be saved, and the effect of quick heating can be realized, thereby further improving the welding efficiency of the welding core wire 3 and the cable interface 2; secondly, according to the skin effect of the high-frequency current, the eddy current in the metal object can be concentrated on the metal surface layer for circulating current along with the increase of the frequency, thereby being beneficial to the rapid melting of the surface layer solder without mainly heating the inner part of the core wire 3 or the pin 21, and being beneficial to saving energy and improving the heating efficiency; thirdly, the heating temperature can be accurately controlled by controlling the frequency of the working current; fourthly, the electromagnetic induction heating is a non-contact type (the heating object does not need to be in contact with the induction object) heating, and is particularly suitable for heating the solder in all the channels 11 through the preassembly fixture 1; fifthly, the electromagnetic induction heating can be realized by using a high-frequency induction heater 4 (as shown in fig. 4), specifically, an induction coil of the high-frequency induction heater 4 is sleeved outside the pre-assembly fixture 1, so that the solder is positioned in the middle of the induction coil, and then the heating temperature is adjusted by adjusting the frequency of the working current of the high-frequency induction heater 4. The high-frequency induction heater 4 is simple to operate, easy to maintain and easy to realize automatic production.
When the core wire 3 is an insulated core wire, namely, an insulating layer is arranged outside the core wire 3; preferably, before the pre-assembling step, the method further comprises: and removing the insulating layer, namely removing part of the insulating layer of the insulating core wire. By removing the insulating layer, the exposed length of the core wire 3 is increased, that is, the area available for welding is increased; the core wire 3 with the increased length can form line contact or surface contact with the pin 21 in the channel 11, so that the contact area of the core wire 3 and the pin 21 is increased, and the welding reliability is improved.
When the cable is a multi-core cable with an insulating sheath, it is preferable that before the step of removing the insulating layer, the method further comprises: and a peeling step, namely removing part of the insulating sheath of the multi-core cable and exposing all the insulating core wires outside the insulating sheath. The welding method of the preferred embodiment can be suitable for welding the multi-core cable and the cable interface, and has good commercial value.
Example 3
In order to provide a cable welding piece with a welding part not easy to damage, the invention provides a welding piece, as shown in fig. 5, which comprises a cable interface 2, a plurality of core wires 3 and a preassembly clamp 1;
the cable interface 2 comprises a plurality of pins 21;
the preassembly fixture 1 comprises a plurality of channels 11 penetrating through the preassembly fixture 1, and two ends of each channel 11 and the surface of the preassembly fixture 1 form two mouth parts 1101 and 1102 respectively;
the number of cores 3 equals the number of pins 21 equals the number of channels 11;
inside each passage 11, one core wire 3 and one pin 21 are fixed by welding.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (20)
1. The cable and cable interface preassembling clamp is characterized by comprising a plurality of channels penetrating through the preassembling clamp, wherein two ends of each channel respectively form two opening parts with the surface of the preassembling clamp.
2. The pre-clamp of claim 1, wherein all of the channels are spaced apart from one another.
3. The pre-clamp of claim 1, wherein the pre-clamp is made of a non-metallic material.
4. The pre-clamp of claim 1, wherein the channel is a linear channel.
5. The pre-clamp of claim 1, wherein all of the channels are arranged parallel to each other.
6. The pre-clamp according to any of claims 1 to 5, characterised in that the pre-clamp is made of a heat-shrinkable material.
7. A method for welding a cable and a cable interface, which is characterized in that the preassembly fixture of any one of claims 1-6 is adopted; the cable comprises a plurality of core wires; the cable interface comprises a plurality of pins, wherein the pins are used for welding with the core wires; the number of the core wires, the number of the pins and the number of the channels are equal; the welding method comprises the following steps:
a preassembling step, wherein all core wires and all pins are arranged in a preassembling fixture, so that each pin and one core wire are oppositely arranged in one channel;
and a welding step, wherein in each channel, the core wire and the pin are fixed and electrically connected in a hot melting solder mode.
8. The method for welding a cable-to-cable interface according to claim 7, wherein the welding step is specifically:
in each channel, the solder forms a molten state after being heated, and the core wire and the pin are electrically connected by the solder in the molten state; and cooling the molten solder to fix the core wire and the pin.
9. The method for welding a cable-to-cable interface according to claim 7, wherein the welding step is specifically: and simultaneously welding the core wires and the pins in all the channels in a hot-melting solder mode, so that each pin is fixed with the corresponding core wire and electrically connected.
10. The method for welding a cable-to-cable interface of claim 7, wherein the pre-assembling step specifically comprises: all core wires are arranged in the preassembly fixture, all pins are arranged in the preassembly fixture, and each pin and one core wire are oppositely arranged in one channel.
11. The method of claim 7, wherein the arrangement of all of the channels corresponds to the arrangement of the pins; the pre-assembling step specifically comprises:
according to the arrangement of the channels, all the core wires are respectively inserted from one opening part of the corresponding channel, each pin is respectively inserted from the other opening part of the corresponding channel, and each pin and one core wire are oppositely arranged in one channel.
12. The method of claim 7, further comprising, prior to the pre-assembling step: and arranging solder, namely arranging the solder on the core wire and/or the pin.
13. The method for soldering a cable to a cable interface according to claim 12, wherein the step of disposing solder is specifically: solder is dipped on the core wire and/or the leads.
14. The method for welding a cable-to-cable interface of claim 7, wherein the pre-assembling step specifically comprises: disposing all of the cores and all of the pins in a pre-assembly fixture such that each pin is disposed in a channel opposite a core; the core wires in the same channel are in line contact or surface contact with the pins.
15. The method for soldering a cable-to-cable interface according to claim 7, wherein the solder in the soldering step is solder.
16. The method for soldering a cable-to-cable interface according to claim 7, wherein in the soldering step, the solder is melted by heating with electromagnetic induction.
17. The method of claim 7, wherein the core wire is an insulated core wire; before the pre-loading step, the method further comprises the following steps:
and removing the insulating layer, namely removing part of the insulating layer of the insulating core wire.
18. The method of welding a cable to cable interface of claim 17, wherein the cable is a multi-core cable; before the step of removing the insulating layer, the method further comprises the following steps:
and a peeling step, namely removing part of the insulating sheath of the multi-core cable and exposing all the insulating core wires.
19. A welding piece is characterized by comprising a cable interface, a plurality of core wires and a preassembly clamp;
the cable interface comprises a plurality of pins;
the pre-assembling clamp comprises a plurality of channels penetrating through the pre-assembling clamp, and two ends of each channel respectively form two opening parts with the surface of the pre-assembling clamp;
the number of the core wires, the number of the pins and the number of the channels are equal;
inside each of the channels, one of the cores and one of the pins are fixed by welding.
20. Use of a pre-clamping fixture, characterized in that a pre-clamping fixture according to any of claims 1-5 is used; the preassembly fixture is used for installing cables and cable interfaces.
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| CN201911328461.0A CN113001079A (en) | 2019-12-20 | 2019-12-20 | Pre-assembling clamp and application thereof, welding method and welding part |
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| CN201911328461.0A CN113001079A (en) | 2019-12-20 | 2019-12-20 | Pre-assembling clamp and application thereof, welding method and welding part |
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Application publication date: 20210622 |