CN103737220A - Internal supporting device for friction stir welding of closed barrel with reserved openings at centers of two ends - Google Patents
Internal supporting device for friction stir welding of closed barrel with reserved openings at centers of two ends Download PDFInfo
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- CN103737220A CN103737220A CN201410025569.3A CN201410025569A CN103737220A CN 103737220 A CN103737220 A CN 103737220A CN 201410025569 A CN201410025569 A CN 201410025569A CN 103737220 A CN103737220 A CN 103737220A
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- welding
- supporting device
- friction stir
- collar
- stir welding
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/126—Workpiece support, i.e. backing or clamping
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Abstract
The invention discloses an internal supporting device for friction stir welding of a closed barrel with reserved openings at the centers of two ends. The internal supporting device is composed of main parts, including bases, a supporting rod, connecting rods, supporting wheels, bearings, lantern rings and the like. The supporting rod is composed of a screw rod and a polish rod, and the connecting rods are connected with the supporting rod through the two lantern rings and can move along the supporting rod under the transmission action of the screw rod. The internal supporting device can effectively position and support the closed barrel with the reserved openings at the centers of the two ends during friction stir welding, circumferential welds of the barrel can be ensured to obtain enough rigid support during welding, after welding is finished, a connecting rod mechanism is enabled to move so as to reduce supporting height under the transmission action of the screw rod, the internal supporting device can be taken out from the small reserved openings at the centers of the two ends, the problem that internal rigid support is difficult to be provided to the closed barrel during friction stir welding is solved, and the problem that the internal supporting device for friction stir welding of the closed barrel is difficult to be taken out is solved. The internal supporting device is simple in structure, good in processing manufacturability, low in cost, convenient for manual operation and high in production efficiency.
Description
Technical field
The present invention relates to a kind of inner support device of friction stir welding extend neck body girth joint, particularly a kind of friction stir welding inner supporting device for center, two ends band reserved opening enclosed type cylindrical shell.
Background technology
The material of cylindrical shell that the present invention welds is magnesium alloy, magnesium alloy is the lightest current structural metallic materials, have that density is low, specific stiffness and specific strength is high, damping shock absorption is good, thermal conductivity is good, effectiveness is good, machinability is good, accessory size is stablized, be easy to the advantages such as recovery, be described as " green engineering material of 21 century ".
At present; the method that the welding of magnesium alloy cylindrical shell mainly adopts has: gas tungsten arc welding (TIG weldering), welding (MIG weldering), Laser Welding (LBW), electron beam welding (EBW), resistance spot welding (RSW); these welding methods are all to belong to melting category, and weld metal can fusing in welding process.Because magnesium alloy has density and fusing point is low, linear expansion coefficient is large, thermal conductivity and electrical conductivity is high, oxidizable and feature that oxide fusing point is high under high temperature, adopt during melt welding method, welding point easily produces following point: splash, be mingled with, weld seam and nearly welded seam area is overheated, grain growth, crackle, pore, weld seam collapse.
Friction stir welding method is a kind of solid-state plasticizing interconnection technique, and in welding process, weld metal does not melt and can form weld seam.Agitating friction welding technology has been reached a conclusion after weighing a matter since generation, at the welding field of low-melting-point metal, obtains application widely, especially aluminium alloy.Agitating friction solder technology has following feature: do not produce molten solder defect, welding deformation little, simple to operate, be applicable to multiple material and joint form.Although friction stir welding has the unrivaled advantage of many melt welding methods, when welding tube structure, more adopt molten solder technology at present.Main cause is that agitating friction welding needs the butt welded seam back side that rigid support is provided, and melt welding method does not need, and for a lot of Welding Structures, back side rigid support is difficult to provide, especially only the enclosed type tube structure with reserved opening.
The disclosed a kind of supporting mechanism for friction stir welding of Chinese patent (CN2754798Y), can meet the requirement of girth joint friction stir welding back side rigid support, can eliminate girth joint inwall and protrude endless belt, but the cylindrical shell girth joint that this supporting mechanism can only be used for not sealing welding, when welding reserved opening closed cylinder, after having welded, bracing or strutting arrangement cannot take out from cylindrical shell.In a word, the existing bracing or strutting arrangement about the welding of girth joint agitating friction, be only applicable to open tube structure or other Welding Structures, can not be used for being with the welding of reserved opening closed cylinder agitating friction, the invention solves such cylindrical shell inner supporting device when adopting agitating friction welding and be difficult for the problem of taking out, the present invention also can be used for general cylindrical shell girth joint welding and support, and has certain flexibility.
Summary of the invention
The object of the invention is to provide a kind of features simple structure, be convenient to the friction stir welding inner supporting device of center, a kind of two ends band reserved opening closed cylinder of processing and manufacturing, solve center, two ends and with enclosed type cylindrical shell inner support device when agitating friction welds of reserved osculum, be difficult to the problem of taking out.
The technical solution that realizes the object of the invention is:
A friction stir welding inner supporting device for center, two ends band reserved opening closed cylinder, is characterized in that: described device comprises support bar, the smooth collar, first connecting rod, the second connecting rod with bearing, support wheel, the tapped collar, wherein support bar one end is the groove structure with halfpace, the other end is screw structure, the logical groove of the described smooth collar coordinates with halfpace, the screw structure of its internal thread of the tapped collar and the support bar other end cooperatively interacts, the described smooth collar with the female collar, be connected respectively three isometric first connecting rods, three connecting rods that the smooth collar connects are connected by the isometric second connecting rod with bearing with three connecting rods that are connected with the female collar respectively, and circumferentially symmetrical around support bar, wherein second connecting rod center cover has support wheel, the total length of described two first connecting rods and a second connecting rod with bearing is less than the length of support bar.
Between described connecting rod, by alignment pin, connect.
The present invention compared with prior art, its remarkable advantage is: the present invention is in version, adopt multi-point support, be provided with altogether three roller supporting girth joints, 120 °, interval distribution successively on circumference, the advantage of multi-point support is to make cylindrical shell stressed more even in welding process, the distribution of 120 °, interval can realize " three jaw self-centerings " effect that is similar to jig, when leading screw rotates, drive the connecting rod along the circumferential direction distributing toward outer support simultaneously, guarantee that three rollers are all the time on same circumference, when clamping cylindrical shell to be welded, guarantee the leading screw circle centre position in girth joint all the time, avoid departing from the center of circle and in the phenomenon of same axis, do not occur, convenient mounting and clamping, the design of roller makes the friction of roller and back of weld become rolling friction, effectively reduce frictional force, being conducive to welding process carries out.The present invention has simple in structure, easy to operate feature.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of bracing or strutting arrangement of the present invention.
Fig. 2 is the groove structure schematic diagram of support bar of the present invention one end with halfpace.
Fig. 3 is the structural representation of the support bar other end of the present invention with leading screw.
Fig. 4 is the enclosed type tube structure schematic diagram with reserved osculum.
Fig. 5 is bracing or strutting arrangement motion principle schematic diagram of the present invention.
The specific embodiment
The following examples can make the present invention of those skilled in the art comprehend.
In conjunction with Fig. 1 ~ Fig. 3, structure composition of the present invention is described:
A friction stir welding inner supporting device for center, two ends band reserved opening closed cylinder, described device comprises support bar 2, the smooth collar 4, first connecting rod 5, the second connecting rod with bearing 6, support wheel 7, the tapped collar 8, wherein support bar 2 one end are the groove structure with halfpace 3, the other end is leading screw 9 structures, the described smooth collar 4 coordinates with halfpace 3 by groove, the screw structure of the tapped collar 8 its internal threads and support bar 2 other ends cooperatively interacts, the described smooth collar 4 with the female collar 8, be connected respectively three isometric first connecting rods 5, three connecting rods that the smooth collar 4 connects are connected by the isometric second connecting rod with bearing 6 with three connecting rods that are connected with the female collar 8 respectively, and circumferentially symmetrical around support bar 2, wherein the second connecting rod 6 center covers with bearing have support wheel 7, the total length of described two first connecting rods 5 and a second connecting rod 6 with bearing is less than the length of support bar.Between described connecting rod, by alignment pin, connect.Described bracing or strutting arrangement is positioned on base 1.
The present embodiment is elaborated as an example of the enclosed type cylindrical shell of the reserved osculum of welding center, two ends band example.
In conjunction with Fig. 4, center, two ends comprises both sides end socket (reserved opening is positioned on end socket) and stack shell with the enclosed type cylindrical shell of reserved opening, and end socket is connected with girth joint with stack shell, and the girth joint back side needs rigid support could adopt friction stir welding method.For the tube structure shown in Fig. 4, the diameter of supposing reserved osculum is 1, and the diameter of girth joint is 2, can define a parameter n, the value of n is 2/ 1(n >=1), the size of n can reflect the difficulty of such enclosed type cylindrical shell inner support device design when adopting agitating friction welding.When the value of n is 1, the reserved diameter of osculum is the same with the diameter of girth joint, and the welding of such enclosed type cylindrical shell girth joint develops into the welding of common cylindrical shell girth joint, and the rigid support at the back side need to be provided, and can solve by existing technology.
Principle of the present invention as shown in Figure 5.Before welding, first stack shell and end socket are passed to support bar 2, stack shell and end socket are sleeved on bearing 7, leading screw 9 is connected with external motor, leading screw 9 rotates under motor effect, by leading screw 9, rotate moving to the smooth collar 4 directions with the internal thread collar 8 of making to coordinate with it on leading screw, the smooth collar 4 is defined in the groove of halfpace 3, can only in groove, self rotate and can not move left and right, during the Distance Shortened of two collars, it is large that the height that first connecting rod 5 supports becomes, while reaching girth joint position radial height, adjust the position of support bar 2, make the center of support wheel 7 in cylindrical shell weld joint on inner side to be welded, complete the rigid support process to girth joint friction stir welding, as shown in Fig. 5 (a).
Outside cylindrical shell, girth joint welding is carried out in commissure, concrete steps are: the height and the position that regulate stirring-head, be located at behind weld seam center, set the speed of mainshaft and the speed of travel, manipulation stirring-head, adjust its height, similar with lathe tool setting, make mixing needle just contact end points to be welded, stirring-head is slowly pressed into weld seam by the rotating speed to be scheduled to, until shaft shoulder contact material when surface, the positioner of clamping cylindrical shell starts to drive barrel body rotation, manually adjust volume under pressure, until stirring-head is mentioned, welding process completes.
After having welded, by driven by motor leading screw 9 counter-rotation, be with distance between the female collar 8 and the smooth collar 4 to increase, drive first connecting rod 5 and the second connecting rod 6 with bearing to move, support wheel 7 declines with respect to the height of support bar 2, as shown in Fig. 5 (b), now, described device also cannot take out from reserved opening.By the motor being connected with leading screw 9, drive it to rotate, the height of support wheel 7 continues to decline, and as shown in Fig. 5 (c), until be down to correct position (being less than the radius of reserved opening), from reserved opening, takes out, as shown in Fig. 5 (d).
Claims (2)
1. a friction stir welding inner supporting device for center, two ends band reserved opening closed cylinder, is characterized in that: described device comprises support bar (2), the smooth collar (4), first connecting rod (5), the second connecting rod with bearing (6), support wheel (7), the tapped collar (8), wherein support bar (2) one end is the groove structure with halfpace (3), the other end is leading screw (9) structure, the described smooth collar (4) coordinates with halfpace (3) by groove, the screw structure of its internal thread of the tapped collar (8) and support bar (2) other end cooperatively interacts, the described smooth collar (4) with the female collar (8), be connected respectively three isometric first connecting rods (5), three connecting rods that the smooth collar (4) connects are connected by the isometric second connecting rod with bearing (6) with three connecting rods that are connected with the female collar (8) respectively, and circumferentially symmetrical around support bar (2), wherein the second connecting rod with bearing (6) center cover has support wheel (7), the total length of described two first connecting rods (5) and a second connecting rod (6) with bearing is less than the length of support bar.
2. bracing or strutting arrangement according to claim 1, is characterized in that: between connecting rod, by alignment pin, connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025569.3A CN103737220B (en) | 2014-01-21 | 2014-01-21 | The friction stir welding inner supporting device of its central band reserved opening closed cylinder in two ends |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410025569.3A CN103737220B (en) | 2014-01-21 | 2014-01-21 | The friction stir welding inner supporting device of its central band reserved opening closed cylinder in two ends |
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| CN103737220A true CN103737220A (en) | 2014-04-23 |
| CN103737220B CN103737220B (en) | 2015-11-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400211A (en) * | 2014-11-24 | 2015-03-11 | 首都航天机械公司 | Method and device for equivalent solid-phase repairing welding of tank friction stir welding defect |
| CN106112374A (en) * | 2016-08-16 | 2016-11-16 | 福建工程学院 | The device of circularity is kept during large-scale cylindrical member housing downhand welding |
| CN107443001A (en) * | 2017-09-18 | 2017-12-08 | 沈阳飞机工业（集团）有限公司 | Inner support mechanism that tube welding is adjustable |
| CN107675537A (en) * | 2017-10-09 | 2018-02-09 | 济南大学 | A kind of band based on displacement driving disturbs the pulping equipment of formula pulping |
| CN109128539A (en) * | 2018-09-19 | 2019-01-04 | 中国航空制造技术研究院 | Laser welding flexible clamping device, the system and method for aluminium alloy sliding rail sleeve |
| CN110524182A (en) * | 2019-09-05 | 2019-12-03 | 廖志强 | A kind of steel-pipe welding auxiliary device |
| CN110653482A (en) * | 2019-09-29 | 2020-01-07 | 重庆科技学院 | Friction stir welding rolling supporting structure |
| CN111112903A (en) * | 2020-01-11 | 2020-05-08 | 顾地科技股份有限公司 | Portable steel wire mesh framework pipe sealing device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400211A (en) * | 2014-11-24 | 2015-03-11 | 首都航天机械公司 | Method and device for equivalent solid-phase repairing welding of tank friction stir welding defect |
| CN104400211B (en) * | 2014-11-24 | 2016-01-27 | 首都航天机械公司 | The method of the strong phase repair weldings such as a kind of tank friction stir welding defect and device |
| CN106112374A (en) * | 2016-08-16 | 2016-11-16 | 福建工程学院 | The device of circularity is kept during large-scale cylindrical member housing downhand welding |
| CN106112374B (en) * | 2016-08-16 | 2017-09-29 | 福建工程学院 | The device of circularity is kept during large-scale cylindrical member housing downhand welding |
| CN107443001A (en) * | 2017-09-18 | 2017-12-08 | 沈阳飞机工业（集团）有限公司 | Inner support mechanism that tube welding is adjustable |
| CN107675537A (en) * | 2017-10-09 | 2018-02-09 | 济南大学 | A kind of band based on displacement driving disturbs the pulping equipment of formula pulping |
| CN109128539A (en) * | 2018-09-19 | 2019-01-04 | 中国航空制造技术研究院 | Laser welding flexible clamping device, the system and method for aluminium alloy sliding rail sleeve |
| CN110524182A (en) * | 2019-09-05 | 2019-12-03 | 廖志强 | A kind of steel-pipe welding auxiliary device |
| CN110653482A (en) * | 2019-09-29 | 2020-01-07 | 重庆科技学院 | Friction stir welding rolling supporting structure |
| CN111112903A (en) * | 2020-01-11 | 2020-05-08 | 顾地科技股份有限公司 | Portable steel wire mesh framework pipe sealing device |
| CN111112903B (en) * | 2020-01-11 | 2022-04-26 | 顾地科技股份有限公司 | Portable steel wire mesh framework pipe sealing device |
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| CN103737220B (en) | 2015-11-18 |
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