CN102151972A - Compulsive air-cooling lower electrode specially used for resistance projection welding of annular nut - Google Patents
Compulsive air-cooling lower electrode specially used for resistance projection welding of annular nut Download PDFInfo
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- CN102151972A CN102151972A CN 201110123918 CN201110123918A CN102151972A CN 102151972 A CN102151972 A CN 102151972A CN 201110123918 CN201110123918 CN 201110123918 CN 201110123918 A CN201110123918 A CN 201110123918A CN 102151972 A CN102151972 A CN 102151972A
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Abstract
The invention discloses a compulsive air-cooling lower electrode specially used for resistance projection welding of an annular nut, which comprises three parts consisting of a lower body of a lower electrode holder, an upper body of the lower electrode holder, and an electrode cap. The lower body of the lower electrode holder adopts a combined cooling way of water cooling and compulsive air-cooling; and the upper body of the lower electrode holder and the electrode cap adopt the compulsive air-cooling. The way of compulsive air-cooling through compressed air is adopted to prevent splashes in the nut from damaging threads during welding, improve the service life of the electrode, and reduce the adherence of the splashes. A locating pin is automatically reset through the pressure generated by the compressed air and a spring. A conical locating pin is adopted to improve the locating precision of the nut, and improve the generality of the locating pin when nuts of different diameters are welded. The compulsive air-cooling lower electrode specially used for the resistance projection welding of the annular nut has a simple structure, is convenient to operate, is easy to obtain stable welding quality during welding, and has more ideal engineering practicability.
Description
Technical field
The invention belongs to the welding technology field of automobile making, relate to the special-purpose bottom electrode that is used for large-sized annular nut and metal sheet (clad steel sheet or carbon steel sheet) resistance projection-welding technology.
Background technology
A large amount of nuts that use all size in body of a motor car is made, wherein considerable part need adopt welding procedure that nut and metal sheet are linked together.The welding procedure that is adopted not only requires welding point to have enough torsional strengths, and requires to guarantee that screwed hole and metal sheet unthreaded hole have certain axiality.This especially for the welding of large-scale nut, has bigger difficulty in actual welding.At present, adopt resistance projection-welding technology that this type of nut is welded more, belong to the multiple projection welding of local location, it is bar-shaped that electrode is generally big tack.But still there is the problem of the following aspects in the resistance projection-welding that adopts general projection welding electrode to carry out this class nut:
(1) the axiality positioning accuracy of nut and metal sheet unthreaded hole is relatively poor;
(2) versatility is relatively poor, and the nut of different size need be changed electrode, influences production efficiency;
(3) alignment pin mostly is fixed, during welding, under the bump of top electrode, may damage nut inner thread and alignment pin, influences positioning accuracy and welding quality;
(4) bottom electrode cooling water and alignment pin are connected, and when electrode uses for a long time, and between the alignment pin during sealing difference, cause the alignment pin place to leak easily;
Splash when (5) welding adheres on the internal thread of nut easily, causes the screw thread damage, influences assembly quality.In addition, splash also may make alignment pin and nut be sticked together, damage alignment pin and nut.
Summary of the invention
The present invention is directed to the above deficiency that prior art exists, purpose is to provide a kind of resistance projection-welding bottom electrode that can be used for the welding of large-sized annular nut, make and to overcome the damage that welding procedure causes nut and electrode in the welding process, improve the positioning accuracy of nut and metal sheet, and possess certain versatility, finally reach requirement welding quality and assembly quality.
To achieve these goals, the technical solution used in the present invention is:
Resistance projection-welding bottom electrode provided by the present invention comprises the lower electrode holder lower body, is installed in the lower electrode holder upper body on lower electrode holder lower body top, is installed in the upper electrode cap on the lower electrode holder upper body.The water flowing blind hole is arranged at described lower electrode holder lower body bottom, and an electrode tip holder cavity is arranged at top, and insulation spacer and back-moving spring are installed in it; The outside of described electrode tip holder cavity is connected with ventilating joint, and compressed air is introduced the electrode tip holder cavity.Described back-moving spring lower end is fixed on the described insulation spacer, isolated being electrically connected, and the upper end connects alignment pin; Described alignment pin passes the insulation sleeve in the lower electrode holder upper body, the upper end is passed by the centre bore of the electrode cap that is contained in upper end, lower electrode holder upper body, with the hole of insulation sleeve be matched in clearance, be electrically connected by insulation sleeve is isolated, when welding, alignment pin is realized automatically reseting under compression spring and compressed-air actuated pressure effect.The link of described alignment pin and back-moving spring is a T shape head, and a T shape diameter is greater than the hole of insulation sleeve, is provided with seal washer between the T shape head of the aperture of insulation sleeve and alignment pin.
The alignment pin upper end is conical, utilizes tapering to improve the axiality positioning accuracy of nut and metal sheet unthreaded hole, and improves the versatility of alignment pin when welding different-diameter nut; And alignment pin and screw thread can not produce bump, thereby have avoided the damage internal thread.
Lower electrode holder lower body of the present invention adopts the water-cooled and the forced air cooling associating type of cooling, and lower electrode holder upper body and electrode cap adopt forced air cooling.Compressed air enters electrode cavity from the ventilating joint of lower electrode holder lower body.When welded condition, alignment pin is depressed, and compressed air flows out by the gap between alignment pin and the insulation sleeve; When welding was finished, alignment pin automatically replied original position under back-moving spring and compressed air effect, and seal washer intercepts compressed air to be continued to flow out by the gap.This streamer mode makes the degree of heat of nut inboard and alignment pin be lower than the nut outside, thereby reduces or eliminated to inboard the splashing of producing of nut.Even a small amount of splash flies into the nut inboard, also be difficult to adhere on internal thread and the alignment pin.Thereby, prevented splash damage screw thread, reduced the splash adhesion, improved electrode life.In addition, compressed air stream has played certain cleaning effect to electrode face, avoided the obstruction of splash, also avoided the excessive wear to electrodes that causes of local current simultaneously, also improved electrode life to a certain extent because of the residual electrode face initiation of splash to the gap.
Electrode structure of the present invention is simple, is convenient to operation, is easy to obtain stable welding quality in welding process, has comparatively desirable engineering practicability.
Description of drawings
Fig. 1 is a lower electrode arrangement schematic diagram of the present invention;
Fig. 2 is a bottom electrode type of cooling schematic diagram of the present invention;
Fig. 3, Fig. 4 cooperate the working state schematic representation of the collar nut projection welding that is used for two types with top electrode for bottom electrode of the present invention.
Among the figure: 1 lower electrode holder lower body, 2 insulation spacers, 3 ventilating joints, 4 back-moving springs, 5 seal washers, 6 insulation sleeves, 7 lower electrode holder upper bodies, 8 electrode caps, 9 alignment pins, 10 metal sheets, 11 nuts, 12 top electrodes.
The specific embodiment
Contrast accompanying drawing below,, further set forth shape, structure, material, operation principle and the using method of each member involved in the present invention by description to specific embodiment.
The basic structure of bottom electrode involved in the present invention comprises lower electrode holder lower body 1, lower electrode holder upper body 7 and electrode cap 8 three parts as depicted in figs. 1 and 2, all adopts chromium zirconium copper to do.
One circular electrode seat cavity is arranged in lower electrode holder lower body 1 top, insulation spacer 2 is installed in it, thus being electrically connected of isolated and lower electrode holder lower body 1, and insulation spacer 2 can adopt ceramic material or other insulating materials to make.The outside of electrode tip holder cavity is connected with ventilating joint, and compressed air is introduced the electrode tip holder cavity.
Back-moving spring 3 is installed in the electrode tip holder cavity, and the lower end is fixed on the insulation spacer 2, and the upper end connects alignment pin 9.Alignment pin 9 can adopt nonmetallic materials to make, and as ceramic material or other insulation exotic materials, also can adopt metal material to make, as 45 steel etc.When welding was finished, alignment pin 9 was realized automatically reseting under back-moving spring 3 and compressed-air actuated pressure effect.
Alignment pin 9 is fixing by the insulation sleeve in the lower electrode holder upper body 76, thereby completely cuts off being electrically connected of alignment pin 9 and lower electrode holder upper body 7, and insulation sleeve 6 can adopt with the insulation spacer identical materials and make.
The upper end of alignment pin 9 is passed by the mesopore of electrode cap 8.Alignment pin 9 upper ends are conical, utilize tapering to improve the axiality positioning accuracy of unthreaded hole in nut 11 and the metal sheet 10.Also be because the existence of tapering when welding different size nut, does not need frequently to change electrode or alignment pin, only need when electrode cap 8 lost efficacy, to change electrode cap and get final product, thereby improve electrode and the versatility of alignment pin 9 when welding different-diameter nut.When welding two types of collar nuts, the electrode working state schematic representation as shown in Figure 3 and Figure 4.
Lower electrode holder lower body 1 of the present invention adopts the water-cooled and the forced air cooling associating type of cooling, and lower electrode holder upper body 7 and electrode cap 8 adopt forced air cooling.The water flowing blind hole that cooling water flows in the lower electrode holder lower body 1 produces the water-cooled effect, and compressed air enters the electrode tip holder cavity from the ventilating joint 3 of lower electrode holder lower body 1, and the type of cooling as shown in Figure 2.When welded condition, alignment pin 9 is depressed, and compressed air flows out by the gap between alignment pin 9 and the insulation sleeve 6, as Fig. 3 or shown in Figure 4; When welding was finished, alignment pin 9 automatically replied original position under back-moving spring 4 and compressed air effect, and seal washer 5 intercepts compressed air to be continued to flow out by the gap.
In when welding, because nut 11 inboards and alignment pin 9 are subjected to the cooling effect by the compressed air of gap ejection, make the degree of heat of nut inboard and alignment pin be lower than the nut outside, thereby reduce or eliminated to inboard the splashing of producing of nut.Even a small amount of splash flies into the nut inboard, under the strong cooling effect of air-flow, also be difficult to adhere on internal thread and the alignment pin.Thereby, prevented splash damage screw thread, reduced the splash adhesion, improved electrode life.In addition, compressed air stream flows through from the gap of 10 of electrode cap 8 and alignment pin 9 and metal sheets, electrode face has been played certain cleaning effect, avoided the obstruction of splash to the gap, also avoided simultaneously the excessive wear to electrodes that causes of local current, also improved electrode life to a certain extent because of the residual electrode face initiation of splash.
Claims (3)
1. the special-purpose forced air cooling resistance projection-welding of a collar nut bottom electrode comprises the lower electrode holder lower body, is installed in the lower electrode holder upper body on lower electrode holder lower body top, is installed in the electrode cap on top, lower electrode holder upper body; It is characterized in that: the water flowing blind hole is arranged at described lower electrode holder lower body bottom, and an electrode tip holder cavity is arranged at top, and insulation spacer and back-moving spring are installed in the electrode tip holder cavity; The outside of described electrode tip holder cavity is connected with ventilating joint, and compressed air is introduced the electrode tip holder cavity; Described back-moving spring lower end is fixed on the described insulation spacer, and the upper end connects alignment pin; Described alignment pin passes the insulation sleeve in the lower electrode holder upper body, and the upper end is passed by the centre bore of the electrode cap that is contained in upper end, lower electrode holder upper body; The link of described alignment pin and back-moving spring is a T shape head, and a T shape diameter is greater than the hole of insulation sleeve, is provided with seal washer between the T shape head of the aperture of insulation sleeve and alignment pin.
2. the special-purpose forced air cooling resistance projection-welding of collar nut according to claim 1 bottom electrode is characterized in that: described alignment pin upper end is for conical.
3. the special-purpose forced air cooling resistance projection-welding of collar nut according to claim 1 and 2 bottom electrode, it is characterized in that: the hole of described alignment pin and insulation sleeve is a matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123918 CN102151972A (en) | 2011-05-13 | 2011-05-13 | Compulsive air-cooling lower electrode specially used for resistance projection welding of annular nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123918 CN102151972A (en) | 2011-05-13 | 2011-05-13 | Compulsive air-cooling lower electrode specially used for resistance projection welding of annular nut |
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| CN102151972A true CN102151972A (en) | 2011-08-17 |
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| CN 201110123918 Pending CN102151972A (en) | 2011-05-13 | 2011-05-13 | Compulsive air-cooling lower electrode specially used for resistance projection welding of annular nut |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489847A (en) * | 2011-11-24 | 2012-06-13 | 重庆理工大学 | Automatic paraxial powder feeding welding gun for alloy powder filling argon tungsten-arc welding |
| CN102615413A (en) * | 2012-03-31 | 2012-08-01 | 重庆至信实业有限公司 | Welding electrode assembly for car front door load-bearing beam member |
| CN103252570A (en) * | 2013-02-21 | 2013-08-21 | 浙江豪情汽车制造有限公司 | Bottom projecting welding electrode with cooling device |
| CN103930232A (en) * | 2011-11-09 | 2014-07-16 | 米亚基欧洲有限责任公司 | Electrical insulating element made of ceramic material for electrical processing device, corresponding processing device |
| CN103962704A (en) * | 2014-05-22 | 2014-08-06 | 北京汽车研究总院有限公司 | Welding electrode head and welding system |
| CN104084689A (en) * | 2014-06-05 | 2014-10-08 | 浙江威泰汽配有限公司 | Telescopic ultrasonic welding fixture base and ultrasonic welding fixture |
| CN104493356A (en) * | 2014-11-20 | 2015-04-08 | 上海奥林汽车配件有限公司 | Positioning resistance welding electrode for reinforcement plate welded assemblies of automobile locks |
| 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 |
| CN108356396A (en) * | 2018-02-12 | 2018-08-03 | 安徽江淮汽车集团股份有限公司 | Stud welding gun |
| CN110405332A (en) * | 2019-07-23 | 2019-11-05 | 安徽宁国晨光精工股份有限公司 | A kind of quick-replaceable, maintenance electrode locating core |
| CN113290300A (en) * | 2021-05-22 | 2021-08-24 | 眉山中车紧固件科技有限公司 | Portable self-plugging rivet short arc cutting gun |
| CN114054922A (en) * | 2021-11-30 | 2022-02-18 | 重庆至信实业集团有限公司 | U-shaped nut plate welding and positioning device |
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| US5471029A (en) * | 1994-07-22 | 1995-11-28 | Tuffaloy Products, Inc. | Water cooled resistance welding assembly |
| CN1181724A (en) * | 1996-05-11 | 1998-05-13 | 青山好高 | Welding electrode |
| CN1927522A (en) * | 2006-09-21 | 2007-03-14 | 湖北汽车工业学院 | Rapid cold nut welding electrode |
| 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 |
-
2011
- 2011-05-13 CN CN 201110123918 patent/CN102151972A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5471029A (en) * | 1994-07-22 | 1995-11-28 | Tuffaloy Products, Inc. | Water cooled resistance welding assembly |
| CN1181724A (en) * | 1996-05-11 | 1998-05-13 | 青山好高 | Welding electrode |
| CN1927522A (en) * | 2006-09-21 | 2007-03-14 | 湖北汽车工业学院 | Rapid cold nut welding electrode |
| 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 |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103930232A (en) * | 2011-11-09 | 2014-07-16 | 米亚基欧洲有限责任公司 | Electrical insulating element made of ceramic material for electrical processing device, corresponding processing device |
| CN103930232B (en) * | 2011-11-09 | 2018-01-19 | 米亚基欧洲有限责任公司 | For electric machining device, electrical insulation parts that ceramic material is done, corresponding processing unit (plant) |
| CN102489847A (en) * | 2011-11-24 | 2012-06-13 | 重庆理工大学 | Automatic paraxial powder feeding welding gun for alloy powder filling argon tungsten-arc welding |
| CN102615413B (en) * | 2012-03-31 | 2015-07-22 | 重庆至信实业有限公司 | Welding electrode assembly for car front door load-bearing beam member |
| CN102615413A (en) * | 2012-03-31 | 2012-08-01 | 重庆至信实业有限公司 | Welding electrode assembly for car front door load-bearing beam member |
| CN103252570A (en) * | 2013-02-21 | 2013-08-21 | 浙江豪情汽车制造有限公司 | Bottom projecting welding electrode with cooling device |
| CN103252570B (en) * | 2013-02-21 | 2016-01-27 | 浙江豪情汽车制造有限公司 | A kind of projection welding bottom electrode with cooling device |
| CN103962704A (en) * | 2014-05-22 | 2014-08-06 | 北京汽车研究总院有限公司 | Welding electrode head and welding system |
| CN103962704B (en) * | 2014-05-22 | 2016-05-18 | 北京汽车研究总院有限公司 | Welding electrode head and welding system |
| CN104084689A (en) * | 2014-06-05 | 2014-10-08 | 浙江威泰汽配有限公司 | Telescopic ultrasonic welding fixture base and ultrasonic welding fixture |
| CN104084689B (en) * | 2014-06-05 | 2016-04-20 | 浙江威泰汽配有限公司 | A kind of Collapsible ultrasonic wave soldering connects tooling base and ultrasonic welding tool |
| CN104493356A (en) * | 2014-11-20 | 2015-04-08 | 上海奥林汽车配件有限公司 | Positioning resistance welding electrode for reinforcement plate welded assemblies of automobile locks |
| 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 |
| 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 |
| 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 |
| CN108356396A (en) * | 2018-02-12 | 2018-08-03 | 安徽江淮汽车集团股份有限公司 | Stud welding gun |
| CN108356396B (en) * | 2018-02-12 | 2020-01-14 | 安徽江淮汽车集团股份有限公司 | Stud welding gun |
| CN110405332A (en) * | 2019-07-23 | 2019-11-05 | 安徽宁国晨光精工股份有限公司 | A kind of quick-replaceable, maintenance electrode locating core |
| CN113290300A (en) * | 2021-05-22 | 2021-08-24 | 眉山中车紧固件科技有限公司 | Portable self-plugging rivet short arc cutting gun |
| CN114054922A (en) * | 2021-11-30 | 2022-02-18 | 重庆至信实业集团有限公司 | U-shaped nut plate welding and positioning device |
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Application publication date: 20110817 |