CN104625513A - Die for exothermic welding of grounding grid and welding method - Google Patents
Die for exothermic welding of grounding grid and welding method Download PDFInfo
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- CN104625513A CN104625513A CN201510066479.3A CN201510066479A CN104625513A CN 104625513 A CN104625513 A CN 104625513A CN 201510066479 A CN201510066479 A CN 201510066479A CN 104625513 A CN104625513 A CN 104625513A
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- welding
- die
- exothermic
- copper bar
- cavity
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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
-
- 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
- B23K23/00—Alumino-thermic welding
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a die for exothermic welding of a grounding grid and a welding method. The welding method includes the process steps: cleaning a copper bar, a grounding rod and a die body and placing the copper bar and the grounding rod to be welded into a copper bar placing cavity and a grounding rod placing cavity respectively; clamping a left piece and a right piece of the die body, laying down a supporting piece, sealing the top of a die cavity and stopping exothermic welding flux before reaction from flowing into the die cavity; pouring the exothermic welding flux into a welding powder filling area, spreading initial pyrophoric powder and covering a die cover; igniting the pyrophoric powder by a firing gun and performing exothermic reaction of the exothermic welding flux in the die; opening the die after hot melting reaction of the exothermic welding flux for 10-20 seconds; taking out the copper bar and the grounding rod which are welded, and removing molten slag. The shortcomings of welding slag, easiness in oxidation, low connecting strength, easiness in corrosion, small contact area, large contact resistance and the like in traditional welding such as electric welding and braze welding, additional energy and power are omitted, and the welding method is a simple, high-efficiency and high-quality metal connecting process.
Description
[technical field]
The present invention relates to a kind of solder technology of railway grounded screen, be specifically related to a kind of grounding grid heat release welding die and welding method, belong to welding technology field.
[background technology]
Along with developing rapidly of railway construction in China cause, also more and more higher to the requirement of traction substation main grounding grid design.For a long time, reliable, stable earthed system, be the basic guarantee maintaining the stable operation of traction substation equipment, guarantee equipment and personal security.The main grounding grid earth conductor at traction station also exists a large amount of connections, and this connection must be reliable, firm, the safe operation of guarantee traction substation main grounding grid.
The principle of exothermic weld is the oxide utilizing copper, under the condition of a high temperature, reduction reaction occurs, puts out, become high-temperature metal copper melt by copper, under the parcel of special die, will two kinds of Metal Melting of welding be needed to be connected together, forms molecule and combine.
Exothermic weld technology and traditional welding manner advantage are that exothermic weld produces excessive heat to complete a kind of method of welding when being and utilizing chemical reaction (exothermic reaction).Sweat soldering is also called: fireclay welding, chamotte melting welding, sweat soldering, heat chemistry melting welding etc.Exothermic weld chemical reaction velocity quickly, only just can complete welding in several seconds, produces heat high, can effectively conduct to welding position, make it fuse into one, form molecule and combine, it need not other any heat energy, are the best ways connected for ground path metallic conductor.Performance characteristics is as follows:
1. current load ability is large
After testing, the dc resistivity change before and after conductor melting welding is close to zero, and the current capacity of fusion point is identical with conductor, has good electric conductivity.This is that any one conventional coupling arrangement is all incomparable.
2. heavy current impact capacity is strong
Test shows, under the bump of big current, conductor melts prior to joint made by flame welding, thus can not be subject to the damage of surge current.
3. resistance conversion is stable
Test shows, between normal current and big current under vibratory impulse, electric current spark does not appear in fusion point, does not also find the situation that fusion point damages and resistance value changes.
4. satisfactory mechanical property
Because be melting joint, its joint and conductor are the combinations of molecule, are a kind of permanent joints.
5. corrosion resistance is strong
Owing to being melting joint, there is no contact surface, there is no residual stress, and joint is covered by fine copper, thus greatly strengthen the resistance to corrosion of conductor.
6. safety simple to operate
Without the need to outside resources, without the need to special equipment.Without the need to professional operator, indoor, outdoor can operate, and it is short to complete the connect hours.
Therefore, necessary grounding grid heat release welding die and the welding method providing a kind of innovation, to overcome described defect of the prior art.
[summary of the invention]
For solving the problem, the object of the present invention is to provide a kind of structure simple, easy to use, speed of welding is fast, and the grounding grid heat release welding die that welding quality is good.
Another object of the present invention is to provide a kind of grounding grid heat release welding method.
For realizing above-mentioned first object, the technical scheme that the present invention takes is: a kind of grounding grid heat release welding die, it comprises die ontology, in described die ontology, be provided with welding powder fill area, die cavity, copper bar placed cavity and drop bar placed cavity from top to bottom successively; Wherein, the bottom of described welding powder fill area connects described die cavity; Described copper bar placed cavity is arranged on the bottom of die cavity, and it laterally runs through described die ontology; Described drop bar placed cavity is arranged on the below of copper bar placed cavity, the bottom of its through described die ontology.
Grounding grid heat release welding die of the present invention is set to further: between described welding powder fill area, die cavity, be provided with a supporting spring.
Grounding grid heat release welding die of the present invention is set to further: the symmetrical setting of described die ontology.
Grounding grid heat release welding die of the present invention is set to further: described welding powder fill area is from top to bottom in gradually-reducing shape.
Grounding grid heat release welding die of the present invention is also set to: be stamped a die cover in the top of described die ontology.
For realizing above-mentioned second object, the technical scheme that the present invention takes is: a kind of grounding grid heat release welding method, and it comprises following processing step:
1), copper bar, drop bar and die ontology are removed clean, the copper bar that will weld, drop bar put into copper bar placed cavity and drop bar placed cavity respectively;
2), the die ontology of left and right two lobe is clamped, puts down supporting spring, seal die cavity top, do not allow the exothermic welding flux before reacting flow into die cavity;
3), exothermic welding flux is poured in welding powder fill area, spreads initial pyrophoric powder afterwards, build die cover;
4), light pyrophoric powder with burning torch, exothermic welding flux makes exothermic reaction in a mold;
5), after exothermic welding flux hot melt reaction 10-20 second, opening mold is got final product;
6), the copper bar welded and drop bar are taken out, and removes slag.
Grounding grid heat release welding method of the present invention is further: in described step 1, and copper bar, drop bar and die ontology need to dry.
Compared with prior art, the present invention has following beneficial effect: it is simple that grounding grid heat release welding die of the present invention has structure, easy to use, and speed of welding is fast, and the plurality of advantages such as welding quality is good; The technique adopting above-mentioned mould to carry out grounding grid heat release welding is compared traditional Metal Bonding Technology and is had stronger corrosion resistance, overload capacity and heat endurance, also there is speed of welding simultaneously fast, efficiency of construction is high, can connect the technical characterstics such as various metals type.Can avoid in the traditional welding such as electric welding, soldering, occurring the shortcomings such as welding slag, oxidizable, bonding strength is not high, perishable, contact area is little, contact resistance is large, it is without the need to external energy and power, is a kind of simple, high efficiency, high-quality Metal Bonding Technology.
[accompanying drawing explanation]
Fig. 1 is the profile of grounding grid heat release welding die of the present invention.
Fig. 2 is the profile putting into copper bar and drop bar in Fig. 1.
[detailed description of the invention]
Refer to shown in Figure of description 1 and accompanying drawing 2, the present invention is a kind of grounding grid heat release welding die, and it comprises die ontology 1, the symmetrical setting of this die ontology 1, thus is convenient to matched moulds and the die sinking of mould.
Welding powder fill area 2, die cavity 3, copper bar placed cavity 4 and drop bar placed cavity 5 is provided with from top to bottom successively in described die ontology 1.A die cover 9 is also stamped in the top of described die ontology 1.
Wherein, the bottom of described welding powder fill area 2 connects described die cavity 3, and it is from top to bottom in gradually-reducing shape, thus the exothermic welding flux being convenient to melting converges.Between described welding powder fill area 2, die cavity 3, be provided with a supporting spring 6, this supporting spring 6 does not allow the exothermic welding flux before reacting flow into die cavity 3.
Described copper bar placed cavity 4 is arranged on the bottom of die cavity 3, and it laterally runs through described die ontology 1, can place a copper bar 7 in it.
Described drop bar placed cavity 5 is arranged on the below of copper bar placed cavity 4, the bottom of its through described die ontology 1, can place a drop bar 8 in it.
Above-mentioned mould is adopted to carry out the concrete technology step of grounding grid heat release welding as follows:
1), copper bar 7, drop bar 8 and die ontology 1 are removed totally, the copper bar 7 that will weld, drop bar 8 put into copper bar placed cavity 4 and drop bar placed cavity 5 respectively; If copper bar 7, drop bar 8 and die ontology 1 are moist, also need to dry;
2), the die ontology 1 of left and right two lobe is clamped, puts down supporting spring 6, seal die cavity 3 top, do not allow the exothermic welding flux before reacting flow into die cavity;
3), exothermic welding flux is poured in welding powder fill area 2, spreads initial pyrophoric powder afterwards, build die cover 9;
4), light pyrophoric powder with burning torch, exothermic welding flux makes exothermic reaction in a mold;
5), through die cavity 3 after exothermic welding flux hot melt, copper bar 7 and drop bar 8 are welded, after reaction 10-20 second, get final product opening mold;
6), the copper bar welded and drop bar are taken out, and removes slag.
Above detailed description of the invention is only the preferred embodiment of this creation, and not in order to limit this creation, any amendment made within all spirit in this creation and principle, equivalent replacement, improvement etc., within the protection domain that all should be included in this creation.
Claims (7)
1. a grounding grid heat release welding die, is characterized in that: comprise die ontology, in described die ontology, be provided with welding powder fill area, die cavity, copper bar placed cavity and drop bar placed cavity from top to bottom successively; Wherein, the bottom of described welding powder fill area connects described die cavity; Described copper bar placed cavity is arranged on the bottom of die cavity, and it laterally runs through described die ontology; Described drop bar placed cavity is arranged on the below of copper bar placed cavity, the bottom of its through described die ontology.
2. grounding grid heat release welding die as claimed in claim 1, is characterized in that: between described welding powder fill area, die cavity, be provided with a supporting spring.
3. grounding grid heat release welding die as claimed in claim 2, is characterized in that: the symmetrical setting of described die ontology.
4. grounding grid heat release welding die as claimed in claim 3, is characterized in that: described welding powder fill area is from top to bottom in gradually-reducing shape.
5. grounding grid heat release welding die as claimed in claim 4, is characterized in that: be stamped a die cover in the top of described die ontology.
6. adopt mould as claimed in claim 4 to carry out a grounding grid heat release welding method, it is characterized in that: comprise following processing step:
1), copper bar, drop bar and die ontology are removed clean, the copper bar that will weld, drop bar put into copper bar placed cavity and drop bar placed cavity respectively;
2), the die ontology of left and right two lobe is clamped, puts down supporting spring, seal die cavity top, do not allow the exothermic welding flux before reacting flow into die cavity;
3), exothermic welding flux is poured in welding powder fill area, spreads initial pyrophoric powder afterwards, build die cover;
4), light pyrophoric powder with burning torch, exothermic welding flux makes exothermic reaction in a mold;
5), after exothermic welding flux hot melt reaction 10-20 second, opening mold is got final product;
6), the copper bar welded and drop bar are taken out, and removes slag.
7. grounding grid heat release welding method as claimed in claim 6, is characterized in that: in described step 1, and copper bar, drop bar and die ontology need to dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066479.3A CN104625513A (en) | 2015-02-09 | 2015-02-09 | Die for exothermic welding of grounding grid and welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510066479.3A CN104625513A (en) | 2015-02-09 | 2015-02-09 | Die for exothermic welding of grounding grid and welding method |
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| CN104625513A true CN104625513A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510066479.3A Pending CN104625513A (en) | 2015-02-09 | 2015-02-09 | Die for exothermic welding of grounding grid and welding method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106670687A (en) * | 2017-02-16 | 2017-05-17 | 宁波高新区远创科技有限公司 | Die cover structure for welding die |
| CN107030373A (en) * | 2017-06-09 | 2017-08-11 | 秉岳电气(上海)有限公司 | One kind is used to put heat weldable novel die and welding method |
| CN107127448A (en) * | 2017-05-18 | 2017-09-05 | 山东电力建设第工程公司 | A kind of power station fireclay welding copper ＆ brass mould, devices and methods therefor |
| CN108311813A (en) * | 2017-01-17 | 2018-07-24 | 广州市雷斯盾电气科技发展有限公司 | A kind of exothermic welding flux of welding metal, preparation and welding method |
| WO2019033223A1 (en) * | 2017-08-14 | 2019-02-21 | 山东电力建设第一工程公司 | Exothermic welding method for welding grounding wires in amazon rainforest |
| CN112171049A (en) * | 2020-09-30 | 2021-01-05 | 广东阿尔派新材料股份有限公司 | Material for quickly welding copper stranded wire of cable and preparation method thereof |
| CN113798746A (en) * | 2021-10-15 | 2021-12-17 | 成都亿开伟业科技开发有限公司 | Device and method for welding high-melting-point metal and low-melting-point metal and application |
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| KR101118189B1 (en) * | 2011-12-16 | 2012-03-16 | 동국정밀 주식회사 | Welding method and device of terminal for relay |
| CN103071919A (en) * | 2012-12-27 | 2013-05-01 | 新昌县人通电力技术有限公司 | Metal fusion welding method |
| CN203696258U (en) * | 2014-01-08 | 2014-07-09 | 上海科东实业有限公司 | Device for heat-released welding |
| CN104209670A (en) * | 2014-08-19 | 2014-12-17 | 李立志 | Construction method of grounding system heat release welding |
| CN204470827U (en) * | 2015-02-09 | 2015-07-15 | 中国中铁航空港建设集团有限公司 | A kind of grounding grid heat release welding die |
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2015
- 2015-02-09 CN CN201510066479.3A patent/CN104625513A/en active Pending
Patent Citations (5)
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| KR101118189B1 (en) * | 2011-12-16 | 2012-03-16 | 동국정밀 주식회사 | Welding method and device of terminal for relay |
| CN103071919A (en) * | 2012-12-27 | 2013-05-01 | 新昌县人通电力技术有限公司 | Metal fusion welding method |
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| CN104209670A (en) * | 2014-08-19 | 2014-12-17 | 李立志 | Construction method of grounding system heat release welding |
| CN204470827U (en) * | 2015-02-09 | 2015-07-15 | 中国中铁航空港建设集团有限公司 | A kind of grounding grid heat release welding die |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311813A (en) * | 2017-01-17 | 2018-07-24 | 广州市雷斯盾电气科技发展有限公司 | A kind of exothermic welding flux of welding metal, preparation and welding method |
| CN106670687A (en) * | 2017-02-16 | 2017-05-17 | 宁波高新区远创科技有限公司 | Die cover structure for welding die |
| CN107127448A (en) * | 2017-05-18 | 2017-09-05 | 山东电力建设第工程公司 | A kind of power station fireclay welding copper ＆ brass mould, devices and methods therefor |
| CN107030373A (en) * | 2017-06-09 | 2017-08-11 | 秉岳电气(上海)有限公司 | One kind is used to put heat weldable novel die and welding method |
| WO2019033223A1 (en) * | 2017-08-14 | 2019-02-21 | 山东电力建设第一工程公司 | Exothermic welding method for welding grounding wires in amazon rainforest |
| CN112171049A (en) * | 2020-09-30 | 2021-01-05 | 广东阿尔派新材料股份有限公司 | Material for quickly welding copper stranded wire of cable and preparation method thereof |
| CN113798746A (en) * | 2021-10-15 | 2021-12-17 | 成都亿开伟业科技开发有限公司 | Device and method for welding high-melting-point metal and low-melting-point metal and application |
| CN113798746B (en) * | 2021-10-15 | 2024-05-14 | 成都亿开伟业科技开发有限公司 | Device, method and application for welding high-low melting point metal |
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| C06 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20150520 |