CN102179618A - Gluing and welding compound connection method - Google Patents
Gluing and welding compound connection method Download PDFInfo
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- CN102179618A CN102179618A CN2011101177715A CN201110117771A CN102179618A CN 102179618 A CN102179618 A CN 102179618A CN 2011101177715 A CN2011101177715 A CN 2011101177715A CN 201110117771 A CN201110117771 A CN 201110117771A CN 102179618 A CN102179618 A CN 102179618A
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Abstract
The invention relates to a gluing and welding compound connection method, which is characterized in that the stirring friction spot welding is organically combined with the gluing connection, the advantages of the two connection techniques are integrated, and the defect of a single connection technique is overcome. The compound connection method can be used for preparing a welding joint which is high in strength, is strong in dynamic load resisting capability, and has specific property such as high sealing property and high reliability. The gluing and welding compound connection method can be widely applied to the spot welding connection of same and different material overlapping joints.
Description
Technical field
The present invention relates to field of material engineering technology, relate in particular to a kind of method of attachment mutually compound of glueing joint with pressure welding.
Background technology
Glueing joint (Bonding) utilizes the mechanical bond power, physical absorption power and the chemical bond that produce on joint face to make a concerted effort and process that two bonded parts are coupled together, compare advantage with uniqueness with welding, be to replenishing of welding, under given conditions, can provide special function; Gluded joint exists the problem that intensity is lower, reliability is relatively poor but simultaneously.Friction stir spot welding (Friction stir spot welding is called for short FSSW) is an a kind of novel solid phase interconnection technique newly developed on the basis of friction stir welding.Compare with traditional resistor spot welding, the friction stir spot welding sweating heat goes into that amount is low, and workpiece deformation is less, welding quality stable; Save the energy, reduce cost; Technical process is simple, only needs simple programming can realize welding process; But then, the anti-fatigue performance of friction stir spot plumb joint is lower, does not possess some property, as problems such as sealing differences.And the at present normal glue weldering composite connecting method that uses, as resistive paste contact soldering method, the main technique defective that is easy to occur comprises: melt run stretches into, splash and shrinkage cavity, can reduce the mechanical property of glue plumb joint greatly, can not satisfy instructions for use.
Summary of the invention
In view of the existing in prior technology deficiency, the present invention is intended to disclose glue welding connection method-agitating friction spot-weld bonding (Bongding-FSSW) that a kind of adhesive bonding technique and stirring friction spot welding technology are composited, to realize mechanical bond, metallurgical binding and chemically combined effective unification, guarantee good serviceability.
Technical solution of the present invention is achieved in that
A kind of glue weldering composite connecting method comprises following processing step:
(1) mother metal surface preparation: the polishing, the cleaning that comprise the mother metal surface;
(2) cloth glue: mother metal connects the surface and is coated with cement respectively, and the overlap joint back forms glue-line;
(3) friction stir spot welding: implement friction stir spot welding in cloth glue position, form spot welding weldering nuclear;
(4) curable adhesive layer forms and glueds joint the friction stir spot plumb joint, finishes the glue weldering and connects;
With the preceding time of staying of friction stir spot welding, be called blanking time behind the described cloth glue, be 15min described blanking time.
Further, in step (2), described cement is fluid sealant or high-strength adhesive; For fluid sealant, its curable adhesive layer temperature is 5-25 ℃, and be 60180min hardening time; For high-strength adhesive, its curable adhesive layer temperature is 20-150 ℃, and be 30-150min hardening time.
Described step (3) is divided into 3 stages, comprising:
A. process of press in: stirring-head constantly rotates, and inserts and connects in the workpiece by applying upsetting force, work under pressure and stirring-head between produce frictional heat, softening material around, stirring-head further is pressed into workpiece;
B. connection procedure: stirring-head is embedded in the workpiece fully, keeps stirring-head pressure also to make shaft shoulder contact workpiece surface, continues the rotation certain hour;
C. connection procedure: finish and connect the back stirring-head and withdraw from, promptly finish the friction stir spot welding that withdraws from the hole from workpiece;
Withdraw from the friction stir spot welding in hole for nothing, return at stirring-head and fill the hole of withdrawing from that stirring-head forms when removing in welding process;
Wherein the rotating speed of stirring-head is 2300-2600r/min, and shaft shoulder volume under pressure is 0.2-0.3mm, and be 6-12s weld interval.
Compared with prior art, the present invention is succession and the development to traditional splicing-resistance spot welding process technology, it organically combines friction stir spot welding and splicing, integrated the advantage separately of two kinds of interconnection techniques, overcome the deficiency of single interconnection technique, by combination process of the present invention can prepare intensity height, anti-dynamic load ability strong, have a high welding point of property such as high leakproofness and reliability.
Compare with present use resistive paste contact welding technology, the present invention has following outstanding advantage:
1) the Forming Quality height, defective is few, distortion is little, welding quality stable.Material can not be melted in the friction stir spot welding process, and the heat input that connection procedure produces remains on reduced levels, and welded seam area does not almost have thermal deformation, and the welding point bond strength is good, fatigue life ratio resistive paste welding head height, welding quality stable;
2) save the energy, reduce cost.External associated companies studies show that the energy that is consumed can reduce by 99%, (the solder joint power consumption of promptly adopting new technology only is 1% of electric resistance welding to be reduced to every solder joint 0.4Wh of new technology from every solder joint 40Wh of resistance spot-weld bonding;
3) equipment investment is few, and technical process is simple;
4) structural change that need not be special, when adopting the welding of agitating friction spot-weld bonding, spot-welded structures originally can continue to adopt, and does not need to restructure;
5) the fastening means life-span is long.The production of Mazda company is used and is shown, the agitating friction head does not have the loss phenomenon yet after having experienced 100,000 somes connections;
6) working environment cleaning.The friction stir spot welding working environment does not have dust and smog, does not need big electric current, and production process cleans, and can not produce any electromagnetism and noise pollution, belongs to green non-pollution, meets the technology of energy-saving and emission-reduction requirement.
Of the same race, foreign material lap joint spot welding connection that the present invention can be widely used in solving.
Description of drawings
Fig. 1 is a process flow diagram of the present invention; Wherein, 1. glue-line
Fig. 2 is the glue plumb joint cross section that the embodiment band withdraws from the hole; Wherein, 1. glue-line 2. withdraws from the hole
Fig. 3 is the microstructure picture of the microscopic structure joint each several part of the described agitating friction spot-weld bonding of embodiment (Bongding-FSSW) FSSW part, wherein
3a) mother metal (BM); 3b) weldering nuclear district (WN); 3c) hot mechanical influence district (TMAZ); 3d) heat affected area (HAZ)
Fig. 4 is the photo of organizing that glueds joint junctional area that district, bonding layer and weldering examine, wherein
4a) glued joint the photo of distinguishing of organizing; 4b) be the photo of organizing of bonding layer and the junctional area of welding nuclear
The specific embodiment
Select for use the thick AZ31 magnesium alloy plate of 3mm as mother metal, carry out the agitating friction spot-weld bonding.Process route as shown in Figure 1, concrete steps are as follows: mother metal (BM) surface preparation (polishing, cleaning) → mother metal (BM) connects surface coating cement, overlap joint back formation glue-line (Bonding layer) → at cloth glue position enforcement friction stir spot welding (FSSW), form spot welding weldering nuclear (WN) → curable adhesive layer, form and glued joint the friction stir spot plumb joint, finish the glue weldering and connect.Further, described cement is selected industrial special-purpose adhesive for use, the enforcement of regulations that the adhesive technology by specification is recommended.The key process parameter that glueds joint (Bonding) comprises: solidification temperature (Curing temperature), hardening time (Curing time), the time of staying behind the coating cement before the friction stir spot welding, be called for short blanking time (spacing interval); The key process parameter of friction stir spot welding (FSSW) comprising: the rotating speed of stirring-head (RS), and shaft shoulder volume under pressure (DCTS), weld interval (WP), the said welding method parameter of agitating friction spot-weld bonding of the present invention is as shown in table 1.The cross section of the lap joint of described agitating friction spot-weld bonding (Bongding-FSSW), as shown in Figure 2, welding point is not found forming defect in conjunction with good.
Table 1Bongding-FSSW technological parameter
In the described agitating friction spot-weld bonding process, in the FSSW step, the microstructure of joint as shown in Figure 3.The grain size of mother metal (BM) is inhomogeneous, has part distortion twin, coarse-grain to be present among the tissue, shown in Fig. 3 a; The microstructure in weldering nuclear district (WN) is made up of fine isometric crystal grains, shown in Fig. 3 b; Compare with the mother metal tissue, weldering nuclear district (WN) crystal grain becomes tiny, is evenly distributed.In the friction stir spot welding process, the stirring-head of rotation is given birth to heat with weldering nuclear district (WN) metal friction at a high speed, weldering nuclear district (WN) metal produces plasticity and flows, mixing needle produces the Mechanical Crushing effect to this district's metal original grain simultaneously, weldering nuclear district's metal reaches replys and the temperature of crystallization again, broken simultaneously crystal grain issues lively attitude answer and crystallization again in the effect of agitating friction heat, because the thermal conductivity factor of AZ31 magnesium alloy is bigger, heat radiation is very fast, crystal grain does not have time enough to grow up, so weldering nuclear district (WN) has formed tiny equiax crystal; Hot mechanical influence district (TMAZ) microstructure, shown in Fig. 3 c, this district is positioned at the edge of stirring-head effect, under stirring-head spin friction effect, this district's metal has produced plasticity and has flowed under the stirring-head rotation drives, tissue is subjected to stirring-head friction and squeezing action that distortion and broken phenomenon to a certain degree taken place, under the Thermal Cycle effect, dynamic recovery and recrystallization process have taken place in hot mechanical influence district (TMAZ) crystal grain, but because suffered stirring action and frictional heat are not welded nuclear district (WN) acutely, weldering nuclear district is not tiny even on distributing for crystal grain.The tissue of joint heat affected area, bottom (HAZ), shown in Fig. 2 d, this district's crystal grain is thicker, and big or small, skewness.In the middle of agitating friction spot-weld bonding (Bongding-FSSW) welding process, heat affected area (HAZ) metal is not subjected to the rubbing action of the effect of mixing needle strong agitation and the shaft shoulder than other regional organizations, conduction of heat is single, and dynamic recrystallization does not take place, and crystal grain is thicker.
Described bonding layer thickness is about 60-70 μ m, and comparatively even, and bonding layer combines with mother metal well, forming defect do not occur, as Fig. 4 a) shown in; Described bonding layer and weldering nuclear Interface Microstructure are as Fig. 4 b) shown in, near interface, glue-line still keeps, but thickness reduces to some extent, and this is because in the processing step of FSSW, and glue-line is heated and the reason of power effect, and pore and inclusion defect do not appear in the interface.
Regulation with reference to the JISZ3136-1999 standard, the tensile shear sample of four kinds of connected mode joints of processing, compound weldering lap joint is carried out tensile shear(ing) test, 3 samples of every kind of joint processing, on the AG-IC testing machine, carry out the tensile and shear property test, measure the shearing resistance load of solder joint, result of the test is as shown in table 2.Result of the test is analyzed discovery, carry out the agitating friction spot-weld bonding with fluid sealant, the stretch-proof shear ability of joint is suitable with single FSSW joint, this illustrates that on the one hand fluid sealant only plays the effect of sealing, the ability that does not possess bearing load, show that on the other hand cement is little to the mechanical property influence of friction stir spot welding weldering nuclear; Use high-strength adhesive to carry out the agitating friction spot-weld bonding, the stretch-proof cutting performance of joint will obviously be better than the stretch-proof cutting performance of single friction stir spot welding, gluded joint.
The tensile shear power value [KN] of table 2 joint
Wherein: Bongding-FSSW (1): the agitating friction spot-weld bonding that uses fluid sealant
Bongding-FSSW (2): the agitating friction spot-weld bonding that uses high-strength adhesive
FSSW: friction stir spot welding
Bongding-2: use the splicing of high-strength adhesive
Above result of the test shows, uses special seal gum to carry out the agitating friction spot-weld bonding, and joint has enough stretch-proof cutting performances again under the prerequisite that guarantees sealing function; Agitating friction spot-weld bonding joint with high-strength adhesive has remarkable advantages aspect the stretch-proof cutting performance, and its tensile shear power value is greater than the tensile shear power value sum of friction stir spot welding and gluded joint; Adhesive is little to the formation and the microstructure influence of friction stir spot welding weldering nuclear, and forming defect does not appear in the glue plumb joint.
The above; only be the preferable specific embodiment of patent of the present invention; but the protection domain of patent of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope of Patent publish of the present invention; the technical scheme of patent and inventive concept thereof are equal to replacement or are changed according to the present invention, all should be encompassed within the protection domain of patent of the present invention.
Claims (3)
1. a glue welds composite connecting method, comprises following processing step:
(1) mother metal surface preparation: the polishing, the cleaning that comprise the mother metal surface;
(2) cloth glue: mother metal connects the surface and is coated with cement respectively, and the overlap joint back forms glue-line;
(3) friction stir spot welding: implement friction stir spot welding in cloth glue position, form spot welding weldering nuclear;
(4) curable adhesive layer forms and glueds joint the friction stir spot plumb joint, finishes the glue weldering and connects;
With the preceding time of staying of friction stir spot welding, be called blanking time behind the described cloth glue, be 0-15min described blanking time.
2. glue weldering composite connecting method according to claim 1 is characterized in that:
In step (2), described cement is fluid sealant or high-strength adhesive; For fluid sealant, its curable adhesive layer temperature is 5-25 ℃, and be 60180min hardening time; For high-strength adhesive, its curable adhesive layer temperature is 20-150 ℃, and be 30-150min hardening time.
3. glue weldering composite connecting method according to claim 1 is characterized in that:
Described step (3) is divided into 3 stages, comprising:
A. process of press in: stirring-head constantly rotates, and inserts and connects in the workpiece by applying upsetting force, work under pressure and stirring-head between produce frictional heat, softening material around, stirring-head further is pressed into workpiece;
B. connection procedure: stirring-head is embedded in the workpiece fully, keeps stirring-head pressure also to make shaft shoulder contact workpiece surface, continues the rotation certain hour;
C. connection procedure: finish and connect the back stirring-head and withdraw from, promptly finish the friction stir spot welding that withdraws from the hole from workpiece;
Withdraw from the friction stir spot welding in hole for nothing, return at stirring-head and fill the hole of withdrawing from that stirring-head forms when removing in welding process;
Wherein the rotating speed of stirring-head is 2300-2600r/min, and shaft shoulder volume under pressure is 0.2-0.3mm, and be 6-12s weld interval.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033421A (en) * | 2015-03-23 | 2015-11-11 | 上海交通大学 | Arc weld bonding connecting system and method for dissimilar metals |
| CN108274109A (en) * | 2018-04-18 | 2018-07-13 | 北京世佳博科技发展有限公司 | A kind of composite connecting method for radiator class product |
| CN110496977A (en) * | 2019-09-04 | 2019-11-26 | 浙江郑氏刀剑有限公司 | A kind of Split type cutter and its preparation process |
| CN111230278A (en) * | 2020-02-26 | 2020-06-05 | 中国科学院上海光学精密机械研究所 | Ultrasonic-assisted glue joint spot welding method |
| CN111438434A (en) * | 2020-05-15 | 2020-07-24 | 沈阳飞机工业（集团）有限公司 | Cold-hot stretching-based friction stir sheet glue welding method |
| CN114734160A (en) * | 2022-05-11 | 2022-07-12 | 哈尔滨工业大学 | Composite connection process for sealing point bearing surface |
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| CN1663729A (en) * | 2004-12-14 | 2005-09-07 | 大连理工大学 | Glue welding connection method |
| EP1745882B1 (en) * | 2005-07-21 | 2008-10-15 | The Boeing Company | Friction stir welding method of joining at least two adjoining work-pieces with application of an adhesive between the at least two workpieces |
| CN101791743A (en) * | 2010-03-31 | 2010-08-04 | 哈尔滨工业大学 | Keyhole-free friction stir spot welding method for dissimilar materials |
| WO2010130271A1 (en) * | 2009-05-12 | 2010-11-18 | Rheinisch-Westfälische Technische Hochschule Aachen | Method for material bonding by means of friction welding using an adhesive |
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2011
- 2011-05-06 CN CN2011101177715A patent/CN102179618A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663729A (en) * | 2004-12-14 | 2005-09-07 | 大连理工大学 | Glue welding connection method |
| EP1745882B1 (en) * | 2005-07-21 | 2008-10-15 | The Boeing Company | Friction stir welding method of joining at least two adjoining work-pieces with application of an adhesive between the at least two workpieces |
| WO2010130271A1 (en) * | 2009-05-12 | 2010-11-18 | Rheinisch-Westfälische Technische Hochschule Aachen | Method for material bonding by means of friction welding using an adhesive |
| CN101791743A (en) * | 2010-03-31 | 2010-08-04 | 哈尔滨工业大学 | Keyhole-free friction stir spot welding method for dissimilar materials |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033421A (en) * | 2015-03-23 | 2015-11-11 | 上海交通大学 | Arc weld bonding connecting system and method for dissimilar metals |
| CN105033421B (en) * | 2015-03-23 | 2017-10-03 | 上海交通大学 | Dissimilar metal electric arc glue weldering connection system and method |
| CN108274109A (en) * | 2018-04-18 | 2018-07-13 | 北京世佳博科技发展有限公司 | A kind of composite connecting method for radiator class product |
| CN110496977A (en) * | 2019-09-04 | 2019-11-26 | 浙江郑氏刀剑有限公司 | A kind of Split type cutter and its preparation process |
| CN111230278A (en) * | 2020-02-26 | 2020-06-05 | 中国科学院上海光学精密机械研究所 | Ultrasonic-assisted glue joint spot welding method |
| CN111438434A (en) * | 2020-05-15 | 2020-07-24 | 沈阳飞机工业（集团）有限公司 | Cold-hot stretching-based friction stir sheet glue welding method |
| CN111438434B (en) * | 2020-05-15 | 2021-07-09 | 沈阳飞机工业（集团）有限公司 | Cold-hot stretching-based friction stir sheet glue welding method |
| CN114734160A (en) * | 2022-05-11 | 2022-07-12 | 哈尔滨工业大学 | Composite connection process for sealing point bearing surface |
| CN114734160B (en) * | 2022-05-11 | 2023-01-03 | 哈尔滨工业大学 | Composite connection process for sealing point bearing surface |
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Application publication date: 20110914 |