CN212169327U - Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials - Google Patents
Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials Download PDFInfo
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- CN212169327U CN212169327U CN202020741227.2U CN202020741227U CN212169327U CN 212169327 U CN212169327 U CN 212169327U CN 202020741227 U CN202020741227 U CN 202020741227U CN 212169327 U CN212169327 U CN 212169327U
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Abstract
The utility model relates to a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials, which comprises a workbench and a friction stir welding mechanism, wherein the workbench comprises a fixed clamping device, the friction stir welding mechanism comprises friction stir welding equipment, the output end of the friction stir welding equipment comprises a stirring head, and a gas protection mechanism is arranged at the stirring head; the friction stir butt welding device also comprises a laser output mechanism, wherein the laser output mechanism comprises a plurality of second laser output mechanisms arranged on the upper part of the gas protection mechanism; the stirring head is internally provided with a hollow placing groove. The utility model discloses a set up laser output mechanism, gas protection mechanism or current heating mechanism in the stirring head of conventional friction stir butt welding equipment, treat the not enough problem of welding zone bottom softening when improving only surface laser heating, the welding process that can significantly reduce in the stirring head axial pressure.
Description
Technical Field
The utility model belongs to the technical field of friction stir welding equipment, concretely relates to friction stir butt welding device for large-thickness titanium nickel xenogenesis material.
Background
The friction stir welding technology is a novel solid phase connection technology developed by british welding research institute in 1991. The principle is that a stirring head with a special shaft shoulder is inserted into a to-be-welded part of a to-be-welded part in a rotating mode at a certain rotating speed, due to the fact that the stirring head and the to-be-welded part generate heat through friction, the temperature of materials in the peripheral area of the stirring head rises to reach a thermoplastic state, the stirring head moves forwards at a certain speed while rotating, at the moment, the thermoplasticized materials can move along the rotating direction of the stirring head under the action of the stirring head, and the materials form reliable solid phase connection under the action of the pressure of the shaft shoulder. The friction stir welding is widely applied to welding of metal materials with low melting point and high performance such as aluminum alloy, magnesium alloy and the like, avoids the defects of air holes, cracks and the like generated when the materials are welded by the traditional welding technology, enhances the quality of welding seams, reduces the welding deformation and saves the welding materials. However, the application of friction stir welding to high-strength alloys such as titanium, steel and nickel, which have high welding difficulty, is limited by the material of the stirring head.
The friction stir welding process can enable a certain temperature gradient to exist in the thickness direction of a welding seam in the welding process, the temperature of the upper surface of the welding seam is highest due to the friction action of a shaft shoulder of a stirring head, the temperature is gradually reduced along the thickness direction, the temperature of the bottom end of the welding seam is lowest, and the temperature difference is increased along with the increase of the thickness of a welding object, so that the defects of incomplete penetration, incomplete fusion, weak connection and the like are easily generated at the bottom of the welding seam in the thick plate welding process, the uniformity of the mechanical property in the thickness direction of the welding seam is influenced, and the overall mechanical property of. Therefore, friction stir welding of high-melting-point and high-strength materials such as titanium, steel and nickel with large thickness becomes a difficult point at the present stage, and the friction stir welding of dissimilar materials with large thickness, high melting point and high strength is difficult to realize.
In order to solve the problem of friction stir welding of large-thickness plates, researchers optimize and improve welding equipment, welding processes and the like in many aspects, but the effect is not satisfactory. For example, patent CN 103978304A discloses a friction stir welding process for thick plates, which is to form a symmetrical step-shaped groove on a thick plate, embed an embedding strip which is the same as the plate in a pit, and perform friction stir butt welding with a fillet by layering the thick plate for multiple times, thereby realizing butt welding between the thick plates. And patent CN 109483071 a discloses a method for laser-friction stir hybrid welding of large-thickness plates, which realizes welding of large-thickness plates by laser welding on the upper part of the large-thickness plates and friction stir welding on the lower part of the large-thickness plates, but the performance of the weld formed by laser welding and friction stir welding is greatly different, so that the welding performance of thick plates in the thickness direction is inconsistent. Patent CN 109202265 a discloses a heavy-duty friction stir welding robot, which is formed by connecting more than two parallel robots in series step by step to form a series-parallel robot having both series and parallel features, and a friction stir welding machine can be mounted on a headstock at the tail end of the series-parallel robot. The hybrid robot in the technical scheme has high rigidity and strong bearing capacity, and can realize friction stir welding of workpieces with large thicknesses. However, the hybrid robot has a complicated structure and is expensive.
Therefore, the development and design of the friction stir welding device for the large-thickness high-melting-point and high-strength dissimilar materials have important economic, social and practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, a friction stir butt welding device for big thickness titanium nickel xenogenesis material of reasonable in design for solving above-mentioned problem just.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials comprises a workbench and a friction stir welding mechanism, wherein the workbench comprises a fixed clamping device, the friction stir welding mechanism comprises friction stir welding equipment, the output end of the friction stir welding equipment comprises a stirring head, and a gas protection mechanism is arranged at the stirring head;
the friction stir butt welding device also comprises a laser output mechanism, wherein the laser output mechanism comprises a plurality of second laser output mechanisms arranged on the upper part of the gas protection mechanism;
the stirring head is internally provided with a hollow placing groove.
As a further optimization scheme of the utility model, the gas protection mechanism comprises a protective gas cover, the top end of the protective gas cover is fixedly connected with the output end of the friction stir welding equipment, the bottom of the protective gas cover is open, the top end of the protective gas cover is provided with an air inlet pipe, and the air inlet pipe is connected with external air supply equipment; the top end of the protective gas hood is provided with a plurality of through holes, one through hole is used for placing a stirring head of friction stir welding equipment, and the stirring head penetrates through the through hole, so that the stirring head is arranged inside the protective gas hood; and the stirring pin at the tail end of the stirring head does not exceed the bottom surface of the shielding gas hood, and the bottom surface of the shielding gas hood is matched with the surface of the alloy plate to be welded and is attached to the surface of the alloy plate to be welded.
As the utility model discloses a further optimization scheme, during the through-hole was worn to locate respectively by No. two laser output mechanism's output, just No. two laser output mechanism output laser facula shine and treat the welding workpiece interface region that contacts, the laser facula of No. two laser output mechanism outputs is located the front portion of stirring head welding direction.
As a further optimization scheme of the utility model, the distance between stirring head and No. two laser output mechanism is decided according to concrete welding operation requirement, No. two laser output mechanism's facula center of action and the distance L of stirring head between the center of action of welding surface are 20-45 mm.
As the utility model discloses a further optimization scheme, the workstation surface is provided with the heat insulating board, the heat insulating board surface is used for placing treats welded titanium alloy board and nickel alloy board.
As the utility model discloses a further optimization scheme, the outside of friction stir welding equipment still is provided with a laser output mechanism, the top of standing groove is connected with a laser output mechanism's output, exports laser in the standing groove of stirring head through a laser output mechanism, the end of standing groove is reachd to a laser beam of laser output mechanism.
As a further optimization scheme of the utility model, be provided with the copper core electrode rather than matcing each other in the standing groove, the side surface parcel of copper core electrode has insulating cover, and the contact of the stirring needle of its bottom and stirring head bottom, the input of copper core electrode is connected with the one end that sets up in the outside pulse power supply of friction stir welding equipment, the insulating board surface is provided with the insulating bath with treating welding workpiece butt joint interface department of correspondence, be provided with the elastic insulation heat insulating mattress rather than matcing in the insulating bath, the upper surface of elastic insulation heat insulating mattress is provided with the recess with area welding workpiece butt joint interface department of correspondence, be provided with the copper electrode rather than matcing each other in the recess, the input of copper electrode with pulse power supply one end is connected.
The beneficial effects of the utility model reside in that:
1) the utility model discloses an increase a laser heating heat source respectively along welding direction front portion at the stirring head of conventional friction stir butt welding equipment and wait to weld titanium nickel exotic material work piece side, utilize two bundles of high energy density's focus laser, the quick heating softens titanium alloy and nickel base alloy exotic material region surface of waiting to weld simultaneously, through controlling laser output power, the size and the center of action of facula respectively, reduces both surface hardness of titanium nickel and makes its hardness after softening equal;
2) the utility model discloses a set up laser output mechanism in the stirring head, heat the stirring needle, the stirring needle bottom is converted into heat energy and is conducted to the welding thing bottom through absorbing laser beam light energy instant, the problem of the regional bottom of treating welding is not softened enough when improving only surface laser heating, make the titanium nickel xenogeneic material of treating welding of great thickness simultaneously reach the softening from top to bottom in step, can greatly reduce stirring head axial pressure in the welding process, stirring needle radial atress and the inhomogeneous problem of atress, be favorable to simultaneously treating welding titanium steel xenogeneic material's mutual flow and fuse in friction stir welding process, and can reduce the wearing and tearing between stirring head and the work piece, in addition can effectively eliminate the defects such as not penetration, not fuse and weak connection that the welding seam bottom produced when the welding of great thickness welding, improve the homogeneity of welding seam thickness direction mechanical properties and improve the welding seam wholeness mechanical properties, the method has the advantages that the service life of the stirring head is greatly prolonged, and the welding speed can be increased under the same rotating speed of the stirring head, so that the welding efficiency is improved;
3) the utility model has the advantages that by arranging the pulse power supply, high-intensity pulse current passes through the head part of the stirring needle and the welding object at the lower end of the stirring needle, the joule heat generated by the current softens the lower end of the welding object, improves the plasticity and the fluidity of the material, and achieves the purposes of reducing welding defects, refining crystal grains, improving welding strength and reducing welding stress;
4) compared with the common open type blowing protection, the protective gas cover improves the protection effect, further reduces the problems of hydrogen absorption, oxygen absorption and nitrogen absorption in the friction stir welding process of the high-activity titanium, and can reduce the consumption of the protective gas;
5) the utility model can reduce the temperature gradient in the thickness direction of the welding object by placing the heat insulation board at the bottom of the welding titanium-nickel dissimilar material, so that the bottom of the welding object also has enough softening effect, thereby increasing the material flow and the material flow quantity in the welding process of the bottom area, fully mixing the titanium-nickel dissimilar material at the bottom, reducing various welding defects at the bottom and improving the welding seam quality;
6) compared with the external energy such as electric arc, induction and the like, the laser-assisted friction stir welding has the advantages of accurate and controllable heating area, high energy utilization rate and the like;
7) the utility model discloses simple structure, stability is high, reasonable in design, the realization of being convenient for except the welding that can be used to titanium nickel xenogenesis material, also can be used to the friction stir butt welding of other high strength, high melting point xenogenesis materials.
Drawings
Fig. 1 is a schematic view of a first cross-sectional structure of embodiment 1 of the present invention;
fig. 2 is a schematic view of a second cross-sectional structure of embodiment 1 of the present invention;
fig. 3 is a schematic view of a first cross-sectional structure of embodiment 2 of the present invention;
fig. 4 is a second sectional structure diagram of embodiment 2 of the present invention.
In the figure: 1. a heat insulation plate; 2. a titanium alloy plate; 3. a stirring head; 4. a protective gas hood; 6. a first laser output mechanism; 7. a nickel alloy plate; 11. an elastic insulating heat-insulating pad; 12. a copper plate electrode; 31. a placement groove; 32. a stirring pin; 33. an insulating sleeve; 34. a copper core electrode; 41. a through hole; 42. an air inlet pipe; 43. and a second laser output mechanism.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.
Example 1
As shown in figures 1 and 2, a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials comprises a workbench, a friction stir welding mechanism and a laser heating mechanism, wherein a heat insulation plate 1 is arranged on the surface of the workbench, an alloy plate to be welded is placed on the surface of the heat insulation plate 1, the temperature gradient in the thickness direction of a welding object can be reduced by arranging the heat insulation plate 1, the bottom of the welding object also has a sufficient softening effect, so that the flowing amount and the flowing amount of materials in the welding process of a bottom area are increased, the titanium-nickel dissimilar materials at the bottom can be fully mixed, various welding defects at the bottom are reduced, and the quality of a welding seam is improved. The workbench further comprises a fixing and clamping device, so that the heat insulation plate 1 and the alloy plate to be welded can be conveniently fixed on the surface of the workbench, the welding operation of the alloy plate is facilitated, and the stability of a working area is kept.
The friction stir welding mechanism comprises friction stir welding equipment, the output end of the friction stir welding equipment comprises a stirring head 3 and a gas protection mechanism, and the output end of the friction stir welding equipment is used for welding an alloy plate to be welded; the stirring head 3 is internally provided with a hollow placing groove 31, the top end of the placing groove 31 is connected with the output end of a first laser output mechanism 6 arranged outside, laser is output into the placing groove 31 of the stirring head 3 through the first laser output mechanism 6, the tail end of the stirring head 3 is provided with a stirring pin 32, a laser beam of the first laser output mechanism 6 reaches the tail end of the placing groove 31, the stirring pin 32 at the tail end of the stirring head 3 is subjected to laser heating, and the stirring pin 32 absorbs the heat energy of the laser beam and conducts the heat energy to a welding object contacted with the stirring pin 32, so that the welding quality and efficiency of the friction stir welding equipment are improved.
The gas protection mechanism comprises a protective gas hood 4, the top end of the protective gas hood 4 is fixedly connected with the output end of the friction stir welding equipment, the bottom of the protective gas hood 4 is open, a gas inlet pipe 42 is arranged at the top end of the protective gas hood 4, the gas inlet pipe 42 is connected with external gas supply equipment, protective gas is filled into the protective gas hood 4 through the gas inlet pipe 42, and the protective gas is nitrogen; the top of protective gas hood 4 is provided with a plurality of through-holes 41, one of them through-hole 41 is used for placing friction stir welding equipment's stirring head 3, stirring head 3 runs through this through-hole 41, makes stirring head 3 set up in protective gas hood 4's inside to the welding is treated to the alloy plate under the protection of protective gas hood 4 to stirring head 3, it needs to explain, stirring needle 32 at stirring head 3 end is no longer than protective gas hood 4's bottom surface, protective gas hood 4's bottom surface and treat that the alloy plate surface of welding mutually supports, and laminate each other, be convenient for make protective gas hood 4 and treat that the inseparable laminating between the alloy plate surface of welding, keep the seal in the welding process, and can make and treat that to weld between alloy plate and protective gas hood 4 relative slip, be convenient for friction stir welding equipment to weld the alloy plate.
Laser heating mechanism including set up in a plurality of No. two laser output mechanism 43 on protection gas shield 4 upper portion, the output of No. two laser output mechanism 43 wears to locate in through-hole 41 respectively, just No. two laser output mechanism 43 output laser facula shine in waiting to weld the alloy board contact interface region, the laser facula of No. two laser output mechanism 43 outputs is located the front portion of 3 welding directions of stirring head, and the welded alloy board is treated in advance to No. two laser output mechanism 43 of being convenient for preheats. The distance between the stirring head 3 and the second laser output mechanism 43 is determined according to the specific welding operation requirements, and in general, the distance between the light spot action center of the second laser output mechanism 43 and the action center of the stirring head 3 on the welding surface may be 20-45 mm.
Example 2
As shown in fig. 3 and 4, a friction stir butt welding device for large-thickness titanium-nickel dissimilar materials is different from embodiment 1 in that a hollow placing groove 31 is arranged inside a stirring head 3, copper core electrodes 34 matched with the placing groove 31 are arranged in the placing groove 31, the side surfaces of the copper core electrodes 34 are wrapped by insulating sleeves 33, the bottoms of the copper core electrodes are in contact with a stirring pin 32 at the bottom of the stirring head 3, and the input ends of the copper core electrodes 34 are connected with one end of a pulse power supply arranged outside a friction stir welding device; the welding device is characterized in that an insulating groove is arranged at the corresponding position of the butt joint interface of the surface of the heat insulation board 1 and a workpiece to be welded, an elastic insulating heat insulation pad 11 matched with the insulating groove is arranged in the insulating groove, a groove is arranged at the corresponding position of the upper surface of the elastic insulating heat insulation pad 11 and the butt joint interface of the workpiece to be welded, a copper plate electrode 12 matched with the groove is arranged in the groove, the input end of the copper plate electrode 12 is connected with one end of a pulse power supply, a path is formed between the two electrodes through the pulse power supply, a copper core electrode 34, the copper plate electrode 12 and a stirring head 3 and the workpiece to be welded, the pulse power supply outputs high-intensity pulse current, the lower end of the workpiece to be welded is softened by joule heat generated by the current, meanwhile, the plasticity and the fluidity of the workpiece are improved, the welding defects are reduced, crystal, The purpose of reducing welding stress.
Taking the friction stir butt welding device in the above embodiment 1 as an example, the method for processing the titanium-nickel dissimilar material is introduced, and the method includes the following steps:
step S1: sequentially placing and installing a heat insulation plate 1, a titanium alloy plate 2 to be welded and a nickel alloy plate 7 on a workbench, fixing the heat insulation plate 1, the titanium alloy plate 2 to be welded and the nickel alloy plate 7 on the workbench by using a fixed clamping device such as a movable clamping block, a high-strength bolt and the like, enabling a stirring head 3 of friction stir welding to be positioned right above a butt joint interface of the two alloy plates, enabling output ends of two second laser output mechanisms 43 to respectively irradiate areas of the titanium alloy plate 2 and the nickel alloy plate 7, adjusting the distance between the stirring head 3 of the friction stir welding and the second laser output mechanisms 43 according to welding requirements, and finally fixing friction stir welding equipment and the second laser output mechanisms 43;
step S2: the purity of the gas is 99.9 to 99.99 percent and the flow rate is 3 to 40 L.min through the gas inlet pipe 42 on the protective gas hood 4-1The argon gas is used as protective gas, the gas inlet pipe 42 points to the area of the titanium alloy plate 2, and the first laser output mechanism 6 and the second laser output mechanism 43 are started simultaneously to preheat and soften the titanium alloy plate 2, the nickel alloy plate 7 and the stirring pin 32 respectively;
step S3: and starting the friction stir welding equipment, rotating the stirring head 3 under the action of axial downward pressure, and enabling the stirring head 3 to relatively feed along the direction of a butt interface of the titanium alloy plate 2 and the nickel alloy plate 7 to be welded to finish the friction stir butt welding operation, so that the titanium alloy plate 2 and the nickel alloy plate 7 are welded into a whole.
If the apparatus prepared in example 2 is used to process a titanium-nickel dissimilar material, the difference from the above operation is that:
step S2': the purity of the gas is 99.9 to 99.99 percent and the flow rate is 3 to 40 L.min through the gas inlet pipe 42 on the protective gas hood 4-1The argon gas is used as protective gas, the gas inlet pipe 42 points to the area of the titanium alloy plate 2, and simultaneously the second laser output mechanism 43 is started to respectively preheat and soften the titanium alloy plate 2, the nickel alloy plate 7 and the stirring pin 32;
step S3': and starting the friction stir welding equipment and the pulse power supply, rotating the stirring head 3 under the action of axial downward pressure, relatively feeding the stirring head 3 along the direction of a butt interface of the titanium alloy plate 2 and the nickel alloy plate 7 to be welded, applying high-strength pulse current to the workpiece to be welded by the pulse power supply through the copper core electrode 34 and the copper plate electrode 12 to soften the workpiece to be welded at the lower end of the welding line, and finally finishing friction stir butt welding operation to weld the titanium alloy plate 2 and the nickel alloy plate 7 into a whole.
In step S1, the titanium alloy plate 2 is placed on the backward side of the stirring head 3 of the friction stir welding device in the rotation direction, the nickel alloy plate 7 is placed on the forward side of the stirring head 3 in the rotation direction, and the thicknesses of the titanium alloy plate 2 and the nickel alloy plate 7 are both 5-30 mm;
in the steps S2 and S2', the laser setting parameters of the first laser output mechanism 6 and the second laser output mechanism 43 include output power, spot size and action center of laser irradiated on the surface of the alloy plate, and the laser setting parameters of the second laser output mechanism 43 are determined according to the offset distance of the center of the stirring head 3 biased to the titanium alloy side and the diameter of the shaft shoulder of the stirring head 3, wherein one side of the laser beam output by the second laser output mechanism 43 irradiated on the spot on the surface of the alloy plate is tangent to the alloy butt joint surface, and the other side of the laser beam irradiated on the surface of the alloy plate is tangent to the relative movement outer contour line formed after the shaft shoulder of the stirring head 3 acts on the surface of the alloy plate to be welded, namely tangent to the edge of the weld joint;
the offset distance e of the center of the stirring head 3, which is deviated to the titanium alloy side, is 0-6 mm;
the laser output by the second laser output mechanism 43 irradiates the front part of the alloy plate surface at the spot action center along the welding direction of the stirring head 3, and the distance L between the spot action center and the stirring head is 18-45 mm;
the output power of the second laser output mechanism 43 acting on the titanium alloy plate 2 area is 600-8500W, the diameter of a light spot irradiated by the laser to the titanium alloy plate 2 surface is 8-20mm, the output power of the second laser output mechanism 43 acting on the nickel alloy plate 7 area is 500-7000W, the diameter of a light spot irradiated by the laser to the nickel alloy plate surface is 5-15mm, the laser beam power of the first laser output mechanism 6 is 300-900W, and the diameter of a laser light spot is 3-6 mm.
In the step S3, the axial downward force F applied to the stirring head 3 is 4000--1The welding speed is v-5-40 mm.min-1。
The pulse current in step S3' is a rectangular square wave, the mean value I of the pulse current is 500-.
The titanium alloy plates 2 include, but are not limited to, TC4 titanium alloy plate 2 and TA2 titanium alloy plate 2, and the nickel alloy plates 7 include, but are not limited to, GH3652 nickel alloy plate 7 and GH4169 nickel alloy plate 7.
Adopt the utility model discloses an alloy plate that the device was prepared compares with ordinary alloy plate, 3 axial downforce of stirring head is littleer, 3 rotational speeds of stirring head are lower, welding speed is higher, it has the 3 life-span of increase stirring head, also can improve the welding seam quality in addition, especially can effectively eliminate not the penetration that the welding seam bottom produced, do not fuse and weak defect such as connection, improve advantages such as homogeneity of welding seam thickness direction mechanical properties and improvement welding seam overall mechanical properties, reducible stirring head 3 in addition, especially the wearing and tearing of stirring needle 32 head, thereby improve the 3 life-spans of stirring head.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. The utility model provides a friction stir butt welding device for large-thickness titanium nickel xenogeneic material, includes workstation and friction stir welding mechanism, the workstation includes fixed clamping device, friction stir welding mechanism includes friction stir welding equipment, its characterized in that: the output end of the friction stir welding equipment comprises a stirring head (3), and a gas protection mechanism is arranged at the stirring head (3);
the friction stir butt welding device also comprises a laser output mechanism, wherein the laser output mechanism comprises a plurality of second laser output mechanisms (43) arranged at the upper part of the gas protection mechanism;
the stirring head (3) is internally provided with a hollow placing groove (31).
2. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 1, characterized in that: the gas protection mechanism comprises a protection gas hood (4), the top end of the protection gas hood (4) is fixedly connected with the output end of the friction stir welding equipment, the bottom of the protection gas hood is open, a gas inlet pipe (42) is arranged at the top end of the protection gas hood (4), and the gas inlet pipe (42) is connected with external gas supply equipment; the top end of the protective gas hood (4) is provided with a plurality of through holes (41), one through hole (41) is used for placing a stirring head (3) of friction stir welding equipment, and the stirring head (3) penetrates through the through hole (41) so that the stirring head (3) is arranged inside the protective gas hood (4); and a stirring needle (32) at the tail end of the stirring head (3) does not exceed the bottom surface of the shielding gas hood (4), and the bottom surface of the shielding gas hood (4) is matched with the surface of the alloy plate to be welded and is attached to the surface of the alloy plate to be welded.
3. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 2, characterized in that: the output end of the second laser output mechanism (43) is respectively arranged in the through holes (41) in a penetrating mode, the output end of the second laser output mechanism (43) outputs laser spots to irradiate the contact interface area of the workpiece to be welded, and the laser spots output by the second laser output mechanism (43) are located in the front portion of the welding direction of the stirring head (3).
4. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 3, wherein: the distance between the stirring head (3) and the second laser output mechanism (43) is determined according to specific welding operation requirements, and the distance L between the light spot action center of the second laser output mechanism (43) and the action center of the stirring head (3) on the welding surface is 20-45 mm.
5. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 4, wherein: the surface of the workbench is provided with a heat insulation plate (1), and the surface of the heat insulation plate (1) is used for placing a titanium alloy plate (2) and a nickel alloy plate (7) to be welded.
6. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 5, wherein: the friction stir welding device is characterized in that a first laser output mechanism (6) is further arranged outside the friction stir welding device, the top end of the placing groove (31) is connected with the output end of the first laser output mechanism (6), laser is output into the placing groove (31) of the stirring head (3) through the first laser output mechanism (6), and the laser beam of the first laser output mechanism (6) reaches the tail end of the placing groove (31).
7. The friction stir butt welding device for the large-thickness titanium-nickel dissimilar material according to claim 5, wherein: be provided with in standing groove (31) rather than copper core electrode (34) that matches each other, the side surface parcel of copper core electrode (34) has insulating cover (33), and stirring needle (32) contact of its bottom and stirring head (3) bottom, the input of copper core electrode (34) is connected with the one end that sets up in the outside pulse power supply of friction stir welding equipment, heat insulating board (1) surface is provided with the insulating bath with the department of waiting to weld work piece butt joint interface correspondence, be provided with in the insulating bath rather than elastic insulation heat insulating mattress (11) that matches each other, the upper surface of elastic insulation heat insulating mattress (11) is provided with the recess with the department of taking to weld work piece butt joint interface correspondence, be provided with in the recess rather than copper electrode (12) that matches each other, the input of copper electrode (12) with pulse power supply one end is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020741227.2U CN212169327U (en) | 2020-05-07 | 2020-05-07 | Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials |
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| CN202020741227.2U CN212169327U (en) | 2020-05-07 | 2020-05-07 | Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421222A (en) * | 2020-05-07 | 2020-07-17 | 铜陵学院 | Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials and machining method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421222A (en) * | 2020-05-07 | 2020-07-17 | 铜陵学院 | Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials and machining method thereof |
| CN111421222B (en) * | 2020-05-07 | 2024-03-08 | 铜陵学院 | Friction stir butt welding device for large-thickness titanium-nickel dissimilar materials and processing method thereof |
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