CN103286432A - Splatter-proof lower electrode for projection welding - Google Patents
Splatter-proof lower electrode for projection welding Download PDFInfo
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- CN103286432A CN103286432A CN2013101810143A CN201310181014A CN103286432A CN 103286432 A CN103286432 A CN 103286432A CN 2013101810143 A CN2013101810143 A CN 2013101810143A CN 201310181014 A CN201310181014 A CN 201310181014A CN 103286432 A CN103286432 A CN 103286432A
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Abstract
The invention discloses a splatter-proof lower electrode for projection welding. The splatter-proof lower electrode for projection welding comprises a chamber formed between an electrode body and a nut electrode cap, and a positioning pin penetrating out of the top end of the nut electrode cap. Each of the bottom end of the positioning pin and the bottom end of the nut electrode cap is provided with a pretightening fitting face used for preventing excessive penetration of the positioning pin. The side wall of the electrode body is provided with a gas pipe joint communicated with the chamber. During welding, the fitting faces of the positioning pin and the nut electrode cap are separated, and gas in the chamber flows out along a gap between the positioning pin and the nut electrode cap; residue flies out with gas flow and is quickly cooled by the high-speed gas flow, and the gas flow also prevents the residue from sticking to a thread; the residue is removed, while the nut electrode cap is also cooled, and the service life of the nut electrode cap is prolonged.
Description
Technical field
The present invention relates to a kind of projection welding device, more precisely, relate to the bottom electrode in this projection welding device.
Background technology
Projection welding technology is present one of most widely used general, modal welding procedure of domestic each big automobile factory, major function is that project-welding nut is welded on the body in white by welding equipment, thereby satisfies automotive upholstery, chassis member and cover a kind of process that part is installed outward.
This shows that the quality of projection welding quality plays a part very important in the car load welding quality.The projection welding equipment of present domestic application mainly contains and exchanges projection welder, direct current projection welder.In projection welding process, can cause following common deficiency: project-welding nut rosin joint, nut burning, screw thread weldbonding slag, weldering partially, nut distortion etc.Which kind of mass defect no matter all can cause inside gadget, chassis member and covers the bad assembling of part outward even can't satisfy assembling, brings loss to enterprise.
Traditional projection welder is bonded on the screw thread by adjusting method control welding slags such as projection welding technological parameter, raising stamping parts surface cleanness, the raising manual detection frequency; Domestic some projection welder is by adopting: 1, improve the pressing mechanism rigidity; 2, improve the servo-actuated property of projection welder; 3, improving self performance that methods such as pressurization stability improve projection welder controls welding slag and is bonded on the screw thread.But no matter be to improve the pressing mechanism rigidity or adopt servo-actuated property projection welder or raising pressurization stability preferably, these all can increase the manufacturing cost of projection welder greatly; Even used high performance projection welder, in projection welding process, because it is bigger influenced by extraneous factor, for example adopt different technological parameters, environmental factor, temperature, project-welding nut quality etc., screw thread weldbonding slag phenomenon all can not obtain the solution of completeness.
By modes such as adjusting process parameter, raising stamping parts surface cleanness and the artificial self check frequencys, there is fluctuation in the projection welding parameter, control stamping parts surface cleanness is daily spot check item, artificial self check relies on human factor, all can not fundamentally solve the mass defect of screw thread weldbonding slag after all.
Summary of the invention
The present invention provides a kind of projection welding the anti-bottom electrode that splashes in order to solve problems of the prior art.
In order to realize above-mentioned purpose, technical scheme of the present invention is: the anti-bottom electrode that splashes of a kind of projection welding, comprise the electrode body and the nut electrode cap that link together, and the chamber that between electrode body and nut electrode cap, forms, also be provided with the alignment pin that passes from nut electrode cap top, the bottom of the bottom of described alignment pin and nut electrode cap has one and prevents the pre-compression fit face that alignment pin excessively passes; The sidewall of described electrode body is provided with the gas-tpe fitting that is communicated with chamber.
Preferably, described chamber is arranged on the upper end of electrode body, and described nut electrode cap is connected by screw thread pair with the top of electrode body chamber.
Preferably, the pre-compressing structure of described mating surface is the spring that is arranged in the chamber.
Preferably, described chamber comprises first chamber, second chamber that is successively set in the electrode body, and the diameter of described first chamber is greater than second chamber, and forms the step as the alignment pin lower dead center in its junction.
Preferably, described gas-tpe fitting is communicated with first chamber or second chamber.
Preferably, the structure of described mating surface is as follows: the bottom of described alignment pin is provided with for the radial circumference projection of fitting with nut electrode cap bottom.
Preferably, the structure of described mating surface is as follows: the bottom of described alignment pin is the frustum that following is big, the higher authorities are little, and the pin-and-hole lower end of passing for alignment pin of described nut electrode cap setting is the conical surface that cooperates with frustum.
Preferably, also be provided with seal between described frustum and the conical surface.
Preferably, also be provided with the but inner chamber that flows through of water of cooling in the described electrode body.
Preferably, the sidewall of described electrode body also is provided with the mating groove that snaps in for spanner.
Bottom electrode of the present invention is provided with the gas-tpe fitting that is communicated with chamber at the sidewall of described electrode body.The free end end of this gas-tpe fitting links to each other with source of the gas point.Under off working state, be full of the gas that the source of the gas point provides in the chamber between nut electrode cap and the electrode body, make this chamber form the seal cavity with certain pressure intensity; When welding, top electrode is pushed down alignment pin and is moved downward, the conical surface of the frustum of alignment pin bottom and nut electrode cap bottom is separated from each other, because the gas pressure intensity in this chamber structure is greater than outside pressure (atmospheric pressure), the gas in the chamber can flow out in the gap between alignment pin and nut electrode cap.Meanwhile, projection welding process begins to carry out, and the welding slag that welding produces originally can be bonded on the screw thread, but under the effect of air-flow, welding slag can fly to the external world along air-flow, thereby avoids being bonded on the screw thread; High velocity air cools off fast to the welding slag of high temperature in process of flowing, prevents that also welding slag is bonded on the screw thread; When taking away welding slag, the nut electrode cap has also been played the effect that cools, prolonged the service life of this nut electrode cap.
Description of drawings
Fig. 1 shows the structural representation of bottom electrode of the present invention.
Fig. 2 shows the profile of bottom electrode among Fig. 1.
The specific embodiment
For the technical problem that the present invention is solved, the technical scheme of employing, the technique effect of obtaining should be readily appreciated that the accompanying drawing below in conjunction with concrete is described further the specific embodiment of the present invention.
With reference to figure 1, Fig. 2, the anti-bottom electrode that splashes of a kind of projection welding disclosed by the invention comprises electrode body 2 and nut electrode cap 4, and electrode body 2 can mode well-known to those skilled in the art be connected with nut electrode cap 4, such as clamping or be threaded etc.After the connection, formed a chamber between electrode body 2 and nut electrode cap 4, this chamber can be arranged in the electrode body 2, also can be located in the nut electrode cap 4, and perhaps the two all has.
Also be provided with alignment pin 5, should pass for the top of the alignment pin 5 that supports project-welding nut from nut electrode cap 4, the bottom of described alignment pin 5 is the frustum that following is big, the higher authorities are little, and the pin-and-hole lower end of passing for alignment pin 5 that described nut electrode cap 4 arranges is the conical surface that cooperates with frustum.After the conical surface and frustum fit together, can prevent that alignment pin 5 from excessively passing from the nut battery cover, namely this frustum and cone match together formed mating surface 54 as the top dead centre of alignment pin 5 motion, when off working state, this frustum must fit tightly together with the conical surface, when when welding, top electrode is pushed down alignment pin 5 and is moved downward, and the frustum of alignment pin 5 bottoms just is separated from each other with the conical surface of nut electrode cap 4 bottoms.For the ease of resetting of alignment pin 5, and the seal that cooperates between frustum and the conical surface, a precompressed resetting-mechanism need be set, for example spring etc.
Top dead centre as alignment pin 5, can also be following structure: the bottom of described alignment pin 5 be provided with for the radial circumference projection of fitting with nut electrode cap 4 bottoms, similar bolt head, when alignment pin 5 is located thereon stop, the bottom of the circumferential protrusion applying nut electrode cap 4 of its lower end.Constituted the pre-compression fit face 54 that prevents that alignment pin 5 from excessively passing.
Bottom electrode of the present invention is provided with the gas-tpe fitting 3 that is communicated with chamber at the sidewall of described electrode body 2.The free end of this gas-tpe fitting 3 links to each other with source of the gas point.Under off working state, be full of the gas that the source of the gas point provides in the chamber between nut electrode cap 4 and the electrode body 2, make this chamber form the seal cavity with certain pressure intensity; When welding, top electrode is pushed down alignment pin 5 and is moved downward, the conical surface of the frustum of alignment pin 5 bottoms and nut electrode cap 4 bottoms is separated from each other, because the gas pressure intensity in this chamber structure is greater than outside pressure (atmospheric pressure), the gas in the chamber can flow out in the gap between alignment pin 5 and nut electrode cap 4.Meanwhile, projection welding process begins to carry out, and the welding slag that welding produces originally can be bonded on the screw thread, but under the effect of air-flow, welding slag can fly to the external world along air-flow, thereby avoids being bonded on the screw thread; High velocity air cools off fast to the welding slag of high temperature in process of flowing, prevents that also welding slag is bonded on the screw thread; When taking away welding slag, nut electrode cap 4 has also been played the effect that cools, prolonged the service life of this nut electrode cap 4.
As indicated above, this chamber can be arranged in electrode body 2 or the nut electrode cap 4, in order to optimize the structure of this bottom electrode, the present invention preferably: described chamber is arranged on the upper end of electrode body 2, and described nut electrode cap 4 is connected by screw thread pair with the top of electrode body 2 chambers.
In a specific embodiment, described chamber comprises first chamber 20, second chamber 21 that is successively set in the electrode body 2, and described gas-tpe fitting 3 can be communicated to first chamber 20 or second chamber 21.Nut electrode cap 4 is connected the top of first chamber 20 in the electrode body 2 by himself external screw thread.The diameter of this first chamber 20 is greater than second chamber 21, and at the step 210 of its junction formation as alignment pin 5 lower dead center, namely alignment pin 5 is in the process that descends, and its lower end can contact with step 210, and stops that this alignment pin 5 continues to descend.One end of spring 6 is against in second chamber 21, and the other end is against the end of alignment pin 5, has played the precompressed effect of this alignment pin 5.
Under off working state, the chamber structure that is communicated with gas-tpe fitting 3 is the confined space with certain pressure intensity, and for example when gas-tpe fitting 3 was communicated to second chamber 21, the sealing structure was first chamber 21 and second chamber 21 of alignment pin 5 bottoms.Can be the matched in clearance of 0.1-0.2mm between alignment pin 5 and the nut electrode cap 4, when the projection welding top electrode moves downward when contacting with 1 alignment pin 5, alignment pin 5 pressuring spring 6 thereupon moves downward, thereby separate with nut electrode cap 4, gas in the confined space contacts with ambient atmos, because the pressure values in the confined space is greater than the outside pressure value, gas can evenly flow to extraneous along alignment pin 5.
In order to increase the seal between alignment pin 5 and the nut electrode cap 4, also can set up seal between described frustum and the conical surface, for example sealing gasket etc.Also can be provided with the but inner chamber 22 that flows through of water of cooling in this electrode body 2.More preferably, the sidewall of described electrode body 2 also is provided with the mating groove 10 that snaps in for spanner.Also can be provided with regulator between gas-tpe fitting 3 and the source of the gas point, by regulating atmospheric pressure value, the welding slag that produces in the projection welding process is taken away up hill and dale by air-flow.
The anti-bottom electrode that splashes of projection welding of the present invention not only can be applicable in the M6 nut, also can be applicable in the project-welding nut of M8, M10, M12, disposable type such as 7/16, use very extensive, automobile industry not only, the projection welding equipment of other relevant industries all can use.
The present invention is by preferred embodiment having carried out detailed explanation.Yet, by to the studying carefully of preamble, to the variation of each embodiment with to increase also be that one of ordinary skill in the art institute is apparent.Being intended that all these variations and increasing of applicant all dropped in the scope that claim of the present invention protects.
Similar numbering refers to similar element in the whole text.For the purpose of clear, the situation that some line, layer, element, parts or feature are amplified may be arranged in the accompanying drawings.
Term used herein is only for to be illustrated specific embodiment, and it is not to be intended to limit the invention.Unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) are all identical with one of ordinary skill in the art's of the present invention understanding.
Claims (10)
1. a projection welding prevents splashing bottom electrode, comprise the electrode body and the nut electrode cap that link together, and the chamber that between electrode body and nut electrode cap, forms, it is characterized in that: also be provided with the alignment pin that passes from nut electrode cap top, the bottom of the bottom of described alignment pin and nut electrode cap has one and prevents the pre-compression fit face that alignment pin excessively passes; The sidewall of described electrode body is provided with the gas-tpe fitting that is communicated with chamber.
2. bottom electrode according to claim 1, it is characterized in that: described chamber is arranged on the upper end of electrode body, and described nut electrode cap is connected by screw thread pair with the top of electrode body chamber.
3. bottom electrode according to claim 2, it is characterized in that: the pre-compressing structure of described mating surface is the spring that is arranged in the chamber.
4. bottom electrode according to claim 1, it is characterized in that: described chamber comprises first chamber, second chamber that is successively set in the electrode body, the diameter of described first chamber is greater than second chamber, and forms the step as described alignment pin lower dead center in its junction.
5. bottom electrode according to claim 4, it is characterized in that: described gas-tpe fitting is communicated with first chamber or second chamber.
6. bottom electrode according to claim 1, it is characterized in that: the structure of described mating surface is as follows: the bottom of described alignment pin is provided with for the radial circumference projection of fitting with described nut electrode cap bottom.
7. bottom electrode according to claim 1, it is characterized in that: the structure of described mating surface is as follows: the bottom of described alignment pin is following big, that the higher authorities are little frustum, and the pin-and-hole lower end of passing for alignment pin of described nut electrode cap setting is the conical surface that cooperates with frustum.
8. bottom electrode according to claim 7 is characterized in that: also be provided with seal between described frustum and the conical surface.
9. bottom electrode according to claim 1 is characterized in that: also be provided with the but inner chamber that flows through of water of cooling in the described electrode body.
10. bottom electrode according to claim 1 is characterized in that: the sidewall of described electrode body also is provided with the mating groove that snaps in for spanner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101810143A CN103286432A (en) | 2013-05-16 | 2013-05-16 | Splatter-proof lower electrode for projection welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101810143A CN103286432A (en) | 2013-05-16 | 2013-05-16 | Splatter-proof lower electrode for projection welding |
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| CN103286432A true CN103286432A (en) | 2013-09-11 |
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| CN2013101810143A Pending CN103286432A (en) | 2013-05-16 | 2013-05-16 | Splatter-proof lower electrode for projection welding |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741761A (en) * | 2015-03-30 | 2015-07-01 | 浙江长华汽车零部件有限公司 | Nut point protrusion welding plate type lower electrode |
| CN104741762A (en) * | 2015-03-30 | 2015-07-01 | 浙江长华汽车零部件有限公司 | Self-deslagging electrode locating pin device |
| CN105108291A (en) * | 2015-08-12 | 2015-12-02 | 台州市路桥舜力车业有限公司 | Manpower and electric dual-power tricycle manufacturing device and manufacturing method |
| CN105149737A (en) * | 2015-08-12 | 2015-12-16 | 杭州利富豪机电设备有限公司 | Welding machine for valve pipe of pressure cooker cover |
| CN105579181A (en) * | 2013-09-25 | 2016-05-11 | 新日铁住金株式会社 | Resistive spot welding device, composite electrode, and resistive spot welding method |
| CN105855756A (en) * | 2016-05-09 | 2016-08-17 | 亿和精密工业（中山）有限公司 | Welding electrode structure with slag blowing function |
| CN106624280A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市川金属科技有限公司 | Method for welding automobile decorative cover bracket |
| CN108672911A (en) * | 2018-08-02 | 2018-10-19 | 浙江爱特新能源汽车有限公司 | A kind of positioning of project-welding nut is welded tooling |
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| JPH0910956A (en) * | 1995-06-26 | 1997-01-14 | Yamada Supotsuto Kogyosho:Kk | Spot welding machine for nut |
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| CN202070850U (en) * | 2011-05-13 | 2011-12-14 | 重庆平伟科技(集团)有限公司 | Special resistance projection welding lower electrode for ring nuts |
| CN202174337U (en) * | 2011-07-19 | 2012-03-28 | 奇瑞汽车股份有限公司 | Lower electrode tip with cooling deslagging device |
| CN202780211U (en) * | 2012-09-13 | 2013-03-13 | 上海和达汽车配件有限公司 | Projection welding bottom electrode capable of cleaning surface welding slag thereof automatically |
| CN203236109U (en) * | 2013-05-16 | 2013-10-16 | 安徽江淮汽车股份有限公司 | Anti-splashing bottom electrode for projection welding |
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2013
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Patent Citations (6)
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| JPH0910956A (en) * | 1995-06-26 | 1997-01-14 | Yamada Supotsuto Kogyosho:Kk | Spot welding machine for nut |
| JPH10249540A (en) * | 1997-03-05 | 1998-09-22 | Pacific Ind Co Ltd | Electrode holder pressing device for spot welding machine |
| CN202070850U (en) * | 2011-05-13 | 2011-12-14 | 重庆平伟科技(集团)有限公司 | Special resistance projection welding lower electrode for ring nuts |
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| CN202780211U (en) * | 2012-09-13 | 2013-03-13 | 上海和达汽车配件有限公司 | Projection welding bottom electrode capable of cleaning surface welding slag thereof automatically |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105579181A (en) * | 2013-09-25 | 2016-05-11 | 新日铁住金株式会社 | Resistive spot welding device, composite electrode, and resistive spot welding method |
| CN104741761A (en) * | 2015-03-30 | 2015-07-01 | 浙江长华汽车零部件有限公司 | Nut point protrusion welding plate type lower electrode |
| CN104741762A (en) * | 2015-03-30 | 2015-07-01 | 浙江长华汽车零部件有限公司 | Self-deslagging electrode locating pin device |
| CN104741761B (en) * | 2015-03-30 | 2018-08-21 | 浙江长华汽车零部件股份有限公司 | The board-like lower electrode of nut point projection welding |
| CN105108291A (en) * | 2015-08-12 | 2015-12-02 | 台州市路桥舜力车业有限公司 | Manpower and electric dual-power tricycle manufacturing device and manufacturing method |
| CN105149737A (en) * | 2015-08-12 | 2015-12-16 | 杭州利富豪机电设备有限公司 | Welding machine for valve pipe of pressure cooker cover |
| CN105855756A (en) * | 2016-05-09 | 2016-08-17 | 亿和精密工业（中山）有限公司 | Welding electrode structure with slag blowing function |
| CN106624280A (en) * | 2016-12-31 | 2017-05-10 | 马鞍山市川金属科技有限公司 | Method for welding automobile decorative cover bracket |
| CN106624280B (en) * | 2016-12-31 | 2019-12-06 | 宿州速果信息科技有限公司 | automobile decorative cover support welding method |
| CN108672911A (en) * | 2018-08-02 | 2018-10-19 | 浙江爱特新能源汽车有限公司 | A kind of positioning of project-welding nut is welded tooling |
| CN108672911B (en) * | 2018-08-02 | 2021-06-04 | 浙江爱特新能源汽车有限公司 | Projection welding nut positioning welding tool |
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Application publication date: 20130911 |