CN105149759A - Welding method and welding device for thermocouple - Google Patents
Welding method and welding device for thermocouple Download PDFInfo
- Publication number
- CN105149759A CN105149759A CN201510413936.1A CN201510413936A CN105149759A CN 105149759 A CN105149759 A CN 105149759A CN 201510413936 A CN201510413936 A CN 201510413936A CN 105149759 A CN105149759 A CN 105149759A
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- Prior art keywords
- thermocouple
- welding
- circuit
- thermocouple wire
- wire
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/02—Pressure butt 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a welding method and welding device for a thermocouple. Two straight thermocouple wires are welded in a butt joint mode. The two straight thermocouple wires to be welded are connected in a direct-current circuit. The butted ends of the two thermocouple wires abut against each other in a coaxial mode, and the other ends of the thermocouple wires are connected with the positive pole and the negative pole of a direct-current power source through the circuit respectively. In the welding process, the direct-current circuit is switched on, and meanwhile pressure is applied to the butted ends of the thermocouple wires, the butted ends of the two thermocouple wires are fused and welded together, and the time that the direct-current circuit is switched on is controlled to be 0.01-1000 ms; after welding cooling is conducted, the thermocouple wires welded into a whole are bent at a weld joint. According to the thermocouple welded through the welding method, a welding spot is shrunk remarkably at the weld joint, temperature detection of the thermocouple can be conducted in the test process more accurately, the temperature detection errors caused by welding spot protrusion of the thermocouple are reduced, and the loss caused during the test in industrial production is avoided.
Description
Technical field
The invention belongs to the welding processing of thermocouple, be specifically related to a kind of thermocouple welding method and welder.
Background technology
Slag crystal property thermocouple assay equipment has been widely used in metallurgical industry experimental study, the essential elements of this equipment is thermocouple, thermocouple is as the heating element heater of equipment and temperature element, and its performance is to experimental data and data reliability important.The welding manner of now conventional thermocouple is very simple, welding circuit as shown in Figure 1, by positive and negative electrode two thermocouple wire tight bindings, then its one end is connected on the negative pole of dc source of an about 30V, the other end touches the graphite electrode be connected with the positive pole of this power supply fast, the moment of releasing with short circuit, huge arc heat was by thermocouple tip melts, and make the both positive and negative polarity molten solder of thermocouple together, the shape after welding as shown in Figure 2.
The thermocouple of this conventional method welding has a larger molten drop due to both positive and negative polarity coupling part, as the tip of thermocouple in Fig. 2, the temperature center recorded in an experiment is the center of ball, and during the experiment of slag crystal property, slag sample is placed on the angle position that two thermocouple wires are formed, therefore, the temperature that the temperature come not is real slag is measured in experiment, the error brought to experiment thus does not obtain the attention of researcher for a long time, and its experimental data may bring heavy losses for follow-up study or operation instruction.
Summary of the invention
The technical problem that the present invention solves is: for the error of the slag crystal property test that existing thermocouple welding brings, a kind of novel thermocouple welding method and welder are provided, obvious thermocouple weld seam can be eliminated, eliminate the error that thermocouple brings in the test of slag crystal property.
The present invention adopts following technical scheme to realize:
A kind of thermocouple welding method, adopt the thermocouple wire docking welding that two straight, be connected in DC circuit by two straight thermocouple wires to be welded, wherein, one end of two thermocouple wire docking coaxially abuts, the other end is connected with the both positive and negative polarity of dc source respectively by circuit, during welding, connect DC circuit, pressure is applied to the butt end of thermocouple wire simultaneously, by the butt end fusion weld of two thermocouple wires together, the time of DC circuit connection is controlled between 0.01ms-1000ms; After welding cooling, the thermocouple wire be welded and fused is bent into U-shaped.
Further, the thermocouple wire commissure of having welded adopts circular arc bending, avoids being fractureed by thermocouple wire in commissure.
Further, during welding, two thermocouple wires are along the docking of same level straight line, and wherein a thermocouple wire is completely fixed, and another root thermocouple wire can linearly move, and when DC circuit is communicated with, to exert pressure pressure to this moveable thermocouple wire.
Preferably, determined by experiment according to the size of different thermocouple wire the welding pressure size of thermocouple wire during welding, scope is at 0.001-1.0N.
Preferably, described dc source adopts 30V dc source.
The invention also discloses a kind of thermocouple welding device for above-mentioned welding method, comprise dc source 4, welding post 5 and time control unit 6;
Described welding post 5 comprises the base 51 of an insulation, and described base 51 is provided with two binding posts 52 and two stops 53, and described binding post 52 connects the both positive and negative polarity of dc source 4 respectively by wire, forms direct current welding circuit; Described stop 53 is arranged between two binding posts, it has the position limiting structure of spacing straight thermocouple wire, on the connection straight line of described position limiting structure between two binding posts 52, described thermocouple wire is arranged on stop 53, one end of docking is welding ends, and the other end contacts two binding posts 52 respectively;
One of them binding post 52 activity is arranged, and is connected with a resilient intermediate pressure means 54, exerts pressure to the thermocouple wire of docking;
Described time control unit 6 is arranged on the direct current welding circuit of dc source 4, controls the turn-on time of welding circuit.
Further, described DC circuit is also provided with the switch 3 controlling power supply start and stop.
Further, the position limiting structure on described stop 53 is the linear structure mating straight thermocouple wire size, as straight-line groove or straight hole.
In welder of the present invention, described resilient intermediate pressure means 54 is the spring of compression, and spring one end is fixed, and the other end is connected to movable binding post.
Described time control unit 6 is the time relay, according to the thickness of sweating heat thermocouple wire, is controlled between 0.01ms-1000ms the turn-on time of welding DC circuit.
The present invention is adopted to carry out the thermocouple welded, commissure around thermocouple wire leaves tiny solder joint, and obvious projection can not be formed, just mate if welding current size obtains with the pressure size adjustment of resilient intermediate pressure means, then solder joint almost be cannot see, be conducive to thermocouple detected temperatures more accurately in process of the test, reduce because thermocouple solder joint protrudes the temperature detection error caused, avoid the loss that the test in industrial production causes.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is thermocouple welding circuit diagram of the prior art.
Fig. 2 is the thermocouple schematic diagram after prior art welding.
Fig. 3 is the thermocouple welding circuit diagram in the present invention.
Fig. 4 is the thermocouple schematic diagram after the present invention welds.
Fig. 5 is the thermocouple bending schematic diagram after the present invention welds.
Number in the figure: 1-thermocouple wire, 11-weld seam, 2-graphite electrode, 3-switch, 4-dc source, 5-welding post, 51-base, 52-binding post, 53-stop, 54-resilient intermediate pressure means, 6-time control unit, 7-circuit.
Detailed description of the invention
Embodiment
See Fig. 3, the thermocouple welding device in diagram, comprises dc source 4, welding post 5 and time control unit 6.Wherein, welding post 5 comprises the base 51 of an insulation, the poly (methyl methacrylate) plate that the base 51 of the present embodiment adopts one piece of 10mm thick is made, the two ends of base 51 are respectively equipped with two binding posts 52, two binding posts 52 connect the both positive and negative polarity of dc source 4 respectively by wire, form direct current welding circuit 7, on circuit 7, series connection is provided with time control unit 6 and switch 3, wherein time control unit 6 time control unit 6 adopts the time relay, for controlling the turn-on time of welding circuit, according to the thickness of sweating heat thermocouple wire, the turn-on time of welding DC circuit is controlled between 0.01ms-1000ms, after the time reaching welding, circuit disconnects by the time relay automatically, switch 3 is the master switch of welding DC circuit.
Two stops 53 are provided with between two binding posts 52, for the thermocouple wire of welding being limited between two binding posts, stop has the position limiting structure of spacing straight thermocouple wire, and along the connection straight line between two binding posts 52, two straight thermocouple wires 1 are separately positioned on the position limiting structure of stop 53, one end that wherein thermocouple wire 1 docks is welding ends, and the other end contacts two binding posts 52 respectively, is formed the path of welding circuit by thermocouple wire docking.
Position limiting structure on stop 53 is the linear structure mating straight thermocouple wire size, and as straight-line groove or straight hole, stop 53 adopts insulating materials to make.
In two binding posts, one of them binding post 52 activity is arranged, and be connected with a resilient intermediate pressure means 54, the thermocouple wire of docking is exerted pressure, movable binding post can be plugged on base 51, slightly can rock from side to side, can produce slight activity displacement, in the process of thermocouple wire welding, reach and the portion compresses of melting is connected.Resilient intermediate pressure means 54 adopts the spring of compression, and spring one end is fixed by holder, and the other end is connected to movable binding post.
The welding manner that the present embodiment adopts first adopts two straight thermocouple wire docking welding, then the cooled thermocouple wire be connected of welding carried out bending for different requirement of experiment.Concrete welding operation method is as follows: during welding, two straight thermocouple wires to be welded are connected in DC circuit, and fixed by stop 53, wherein, one end of two thermocouple wire docking coaxially abuts, the other end is connected with the both positive and negative polarity of dc source respectively by circuit, during welding, connect DC circuit, thermocouple wire butt end is melted by electric discharge, when specifically arranging thermocouple wire, two thermocouple wires dock along same level straight line, wherein a thermocouple wire is completely fixed, another root thermocouple wire can linearly move, when DC circuit is communicated with, this moveable thermocouple wire is exerted pressure pressure, the extruding of the butt end of two thermocouple wire meltings is welded together, control the time of DC circuit connection between 0.01ms-1000ms, after welding cooling, the thermocouple wire bending will be welded and fused in commissure.
In the present embodiment, the time relay (model ZYS6 (H3Y)-4) controls the welding job time, according to the size of thermocouple wire, setting scope weld interval is at 0.01ms-1000ms, after welding circuit connects by Fig. 3, about 30V dc source is accessed in Road, connecting and disconnecting of the circuit is by switch control rule, thermocouple wire is connected with two binding posts on welding tooling base respectively by both positive and negative polarity, and coaxially fix on the stopper, stop in order to ensure two thermocouple wires on same level straight line and butt end aim at, the spring that the binding post of one of them activity connects is in order to thermocouple wire close contact provide certain pressure in energising welding process, pressure size regulates according to the size of welding current and thermocouple wire.When after circuit ON, positive and negative thermocouple wire docking is most advanced and sophisticated produces electric arc, make the most advanced and sophisticated local melting of thermocouple, under the pressure effect of spring, pressure bonding is connected together, simultaneously when welding process starts, the time relay also starts timework, after the delay time of setting reaches, circuit disconnects, and welding terminates.
Thermocouple after welding as shown in Figure 4, the thermocouple welded, weld seam 11 place of weld only leaves tiny solder joint, just mate if welding current size obtains with the pressure size adjustment of spring, weld under suitable molten condition in thermocouple wire butt end, then solder joint almost can be cannot see.Then at integrally welded thermocouple in weld seam 11 place's bending; curve U-shaped; as shown in Figure 5; U-shaped bending effect can be avoided rupturing in commissure during bending; two curved a pair good thermocouples can be used for the test of Crystallization Performance of Mold Flux for Casting double-thermocouple; covering slag is heated, thermometric, strand in simulation continuous cast mold, covering slag, actual condition between crystallizer wall, realize home position observation, record, the fusing of measuring and protecting slag and the hot physical property of phase transition process.
Above-mentioned is the preferred embodiment of the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits, in form and details to the various changes done by the present invention, all belong to protection scope of the present invention.
Claims (10)
1. a thermocouple welding method, is characterized in that:
Adopt two straight thermocouple wire docking welding, two straight thermocouple wires to be welded are connected in DC circuit; Wherein, one end of two thermocouple wire docking coaxially abuts, and the other end is connected with the both positive and negative polarity of dc source respectively by circuit; During welding, connect DC circuit, suitable pressure is applied to the butt end of thermocouple wire simultaneously, by the butt end fusion weld of two thermocouple wires together, control the time of DC circuit connection between 0.01ms-1000ms;
After welding cooling, according to the thermocouple wire bending will be welded and fused needed for experiment.
2. a kind of thermocouple welding method according to claim 1, the thermocouple wire commissure of having welded adopts circular arc to be bent into U-shaped.
3. a kind of thermocouple welding method according to claim 1, during welding, two thermocouple wires dock along same level straight line, wherein a thermocouple wire is completely fixed, another root thermocouple wire can linearly move, when DC circuit is communicated with, suitable pressure is applied to this moveable thermocouple wire.
4. a kind of thermocouple welding method according to any one of claim 1-3 is 0.001-1.0N to the welding pressure size of thermocouple wire during welding.
5. a kind of thermocouple welding method according to claim 4, described dc source adopts 30V dc source.
6. for a thermocouple welding device of claim 1-5, it is characterized in that: comprise dc source (4), welding post (5) and time control unit (6);
Described welding post (5) comprises the base (51) of an insulation, described base (51) is provided with two binding posts (52) and two stops (53), described binding post (52) connects the both positive and negative polarity of dc source (4) respectively by wire, forms direct current welding circuit; Described stop (53) is arranged between two binding posts, it has the position limiting structure of spacing straight thermocouple wire, described position limiting structure is positioned on the connection straight line between two binding posts (52), described thermocouple wire is arranged on stop (53), one end of docking is welding ends, and the other end contacts two binding posts (52) respectively;
One of them binding post (52) activity is arranged, and is connected with a resilient intermediate pressure means (54), exerts pressure to the thermocouple wire of docking;
Described time control unit (6) is arranged on the direct current welding circuit of dc source (4), controls the turn-on time of welding circuit.
7. thermocouple welding device according to claim 6, described DC circuit is also provided with the switch (3) controlling power supply start and stop.
8. thermocouple welding device according to claim 6, the position limiting structure on described stop (53) is the linear structure mating straight thermocouple wire size, as straight-line groove or straight hole.
9. thermocouple welding device according to claim 6, described resilient intermediate pressure means (54) is the spring of compression, and spring one end is fixed, and the other end is connected to movable binding post.
10. thermocouple welding device according to claim 6, described time control unit (6) is the time relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413936.1A CN105149759B (en) | 2015-07-14 | 2015-07-14 | A kind of thermocouple welding method and welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413936.1A CN105149759B (en) | 2015-07-14 | 2015-07-14 | A kind of thermocouple welding method and welder |
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| Publication Number | Publication Date |
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| CN105149759A true CN105149759A (en) | 2015-12-16 |
| CN105149759B CN105149759B (en) | 2018-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048022A (en) * | 2018-10-09 | 2018-12-21 | 西安中科华芯测控有限公司 | Dual inline type Metal Packaging photodetector welding circuit control device and method |
| CN113967770A (en) * | 2021-11-01 | 2022-01-25 | 广西电网有限责任公司南宁供电局 | Coaxial cable joint welding and testing device |
-
2015
- 2015-07-14 CN CN201510413936.1A patent/CN105149759B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048022A (en) * | 2018-10-09 | 2018-12-21 | 西安中科华芯测控有限公司 | Dual inline type Metal Packaging photodetector welding circuit control device and method |
| CN109048022B (en) * | 2018-10-09 | 2023-08-22 | 西安中科华芯测控有限公司 | Dual in-line metal package photoelectric detector welding circuit control device and method |
| CN113967770A (en) * | 2021-11-01 | 2022-01-25 | 广西电网有限责任公司南宁供电局 | Coaxial cable joint welding and testing device |
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| CN105149759B (en) | 2018-09-14 |
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