CN110202253B - Friction stir welding clamping device and three-dimensional welding equipment - Google Patents

Friction stir welding clamping device and three-dimensional welding equipment Download PDF

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Publication number
CN110202253B
CN110202253B CN201910610324.XA CN201910610324A CN110202253B CN 110202253 B CN110202253 B CN 110202253B CN 201910610324 A CN201910610324 A CN 201910610324A CN 110202253 B CN110202253 B CN 110202253B
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machine tool
power head
disc
driving
guide rail
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CN110202253A (en
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吉冬志
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Tianjin Geng Xinda Aluminum Co
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Tianjin Geng Xinda Aluminum Co
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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
    • 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

Abstract

The embodiment of the invention discloses a friction stir welding clamping device and three-dimensional welding equipment, which belong to the technical field of friction stir welding, wherein the clamping device can stably clamp two mutually welded workpieces, and can extrude the workpieces outwards through an extrusion disc after welding is finished, so that the workpieces are separated from a first positioning shaft and a second positioning shaft, and the problem that the workpieces cannot be separated due to mechanical stress is solved; the gantry type two-dimensional multifunctional machine tool equipment is provided with the clamping device, and the clamping device can move along the length direction of the machine tool body and rotate along the circumference of the central axis of the clamping device in a workpiece clamping state, so that the three-dimensional welding function of workpieces is realized, and the technical blank of three-dimensional welding is filled. According to the invention, the existing gantry type two-position machine tool equipment is improved by arranging the clamping device, so that a three-dimensional welding function is realized, the application range is expanded, and the work efficiency and the precision of workpiece welding are improved.

Description

Friction stir welding clamping device and three-dimensional welding equipment
Technical Field
The embodiment of the invention relates to the technical field of friction welding, in particular to a friction stir welding clamping device and three-dimensional welding equipment.
Background
Friction stir welding is an innovative advanced friction welding technology and is known as a green and environment-friendly welding technology with high quality and low cost. Compared with the traditional welding method, the friction stir welding has the advantages of high welding strength, smooth appearance of a welding joint, small residual stress after welding, small deformation, no pollution, high efficiency, energy conservation and the like.
The linear welding and curve welding quality requirements of the aluminum alloy products are high, the welding seam is required to be smooth in surface, good in sealing performance and even in microstructure, and the air hole defect is not allowed to occur, so that friction stir welding is mostly adopted for welding the aluminum alloy products with high quality requirements.
However, at present, development and application of gantry type two-dimensional multifunctional machine tool equipment for realizing three-dimensional welding are still in a blank state, firstly, the design function of the two-dimensional multifunctional machine tool equipment is single, and only plane curve welding can be realized, welding equipment does not have a three-dimensional welding function, and particularly, friction stir welding processing of the lateral periphery of a cylindrical workpiece cannot be realized at all, so that limitation of functions of the welding equipment is caused. If the novel curve rotary welding process equipment for three-dimensional welding processing is designed through two-dimensional equipment, the difficulty can be effectively broken through, and the blank of three-dimensional curve welding is filled up by utilizing the two-dimensional equipment.
Disclosure of Invention
Therefore, the embodiment of the invention provides a friction stir welding clamping device and three-dimensional welding equipment, which aim to solve the technical problems in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to a first aspect of the embodiment of the invention, the friction stir welding clamping device comprises a power mechanism, a first clamping mechanism, a second clamping mechanism and a base, wherein the power mechanism, the first clamping mechanism and the second clamping mechanism are sequentially and fixedly arranged on the base, the power mechanism is in transmission connection with the first clamping mechanism, and the first clamping mechanism and the second clamping mechanism are oppositely arranged.
Further, first fixture includes first stable dish, first support frame, first supporting disk, first extrusion jar, first extrusion dish and first locating shaft, first stable dish, first supporting disk and first extrusion dish are coaxial locating in proper order on the first locating shaft, first stable dish with first locating shaft fixed connection, first supporting disk and first extrusion dish with first locating shaft rotates to be connected, first supporting disk lower part outer fringe with first support frame upper end fixed connection, first support frame lower extreme with base fixed connection, it is a plurality of first extrusion jar circumference is evenly fixed first supporting disk side, the output shaft of first extrusion jar slides and passes first supporting disk and with first extrusion dish side offsets.
Furthermore, the second clamping mechanism comprises a second stabilizing disc, a second supporting disc, a second extrusion cylinder, a second extrusion disc, a second positioning shaft, a fixing frame, a sliding rail and a sliding seat, the second stabilizing disc, the second supporting disc and the second extrusion disc are sequentially and coaxially arranged on the second positioning shaft, the second stabilizing disc is fixedly connected with the second positioning shaft, the second supporting disc and the second extrusion disc are rotatably connected with the second positioning shaft, the outer edge of the lower part of the second supporting disc is fixedly connected with the upper end of the first supporting frame, the lower end of the second supporting frame is in sliding contact with the upper end of the sliding seat, the plurality of second extrusion cylinders are circumferentially and uniformly fixed on the side surface of the second supporting disc, the output shaft of the second extrusion cylinder penetrates through the second supporting disc in a sliding manner and abuts against one side surface of the second stabilizing disc, the fixing frame is arranged on the other side surface of the second stabilizing disc, the lower end of the fixing frame is fixedly connected with the sliding seat, the sliding rail is fixedly arranged on the upper end face of the base, and the sliding seat is slidably arranged on the sliding rail.
Further, still include the mounting bracket and drive actuating cylinder, the mounting bracket is fixed to be located on the base, the mounting bracket is located the slide rail tip, it transversely locates to drive actuating cylinder on the mounting bracket, drive actuating cylinder's actuating lever tip fixed connection the mount, the actuating lever with second location axle coaxial line sets up.
Furthermore, the power mechanism comprises a variable frequency motor, a power box and a reduction gearbox, the variable frequency motor is connected with the power box in a transmission manner, the power box is connected with the reduction gearbox in a transmission manner, and the reduction gearbox is connected with the first stabilizing disc in a transmission manner.
Further, still include sliding bracket, sliding bracket fixes and locates the base upper end, sliding bracket locates between first fixture and the second fixture.
Further, the extrusion device further comprises a hydraulic station, and the first extrusion cylinder and the second extrusion cylinder are connected with the hydraulic station through pipelines.
According to a second aspect of the embodiment of the present invention, there is provided a three-dimensional welding device, which applies the friction stir welding clamping device as described above, and further includes a machine tool body, a driving device, a machine tool table, a driving guide rail, a driving lead screw, a machine tool left column, a machine tool right column, a machine tool cross beam, a first power head subassembly and a second power head subassembly, wherein the driving device is fixedly disposed at the rear end of the machine tool body, the upper end of the machine tool body is provided with the driving guide rail and the driving lead screw, the end portion of the driving lead screw is in transmission connection with the driving device, the machine tool table is slidably disposed on the driving guide rail along the driving lead screw, the machine tool left column is disposed at the left side of the machine tool body, the machine tool right column is disposed at the right side of the machine tool body, the machine tool cross beam spans over the machine tool body, and two ends of the machine tool cross beam are respectively and, the first power head sub-assembly and the second power head sub-assembly are arranged on the cross beam of the machine tool in a transverse sliding mode, and the friction stir welding clamping device is fixedly arranged on the workbench of the machine tool.
Further, still including locating lathe crossbeam upper guideway, lathe crossbeam lower guideway, first unit head second direction lead screw, first unit head second direction driving motor, second unit head second direction lead screw and second unit head second direction driving motor on the lathe crossbeam, lathe crossbeam upper guideway is located lathe crossbeam upper end, lathe crossbeam lower guideway is located lathe crossbeam lower extreme, first unit head second direction lead screw is located lathe crossbeam upper guideway below, second unit head second direction lead screw is located lathe crossbeam lower guideway top, first unit head second direction lead screw left end transmission is connected first unit head second direction driving motor, second unit head second direction lead screw right-hand member transmission is connected second unit head second direction driving motor, first unit head sub-assembly is followed first unit head second direction lead screw slides and is located lathe crossbeam upper guideway and quick-witted crossbeam And the second power head sub-assembly is arranged on the lower guide rail of the machine tool beam and the upper guide rail of the machine tool beam in a sliding manner along a lead screw in the second direction of the second power head.
Further, first unit head sub-assembly is the same with second unit head sub-assembly structure, second unit head sub-assembly includes spindle motor, backplate sub-assembly, backplate third direction driving motor and stirring head, the backplate sub-assembly is located second unit head sub-assembly rear portion, backplate third direction driving motor locates the upper portion of backplate sub-assembly, backplate sub-assembly and lathe crossbeam upper rail and lathe crossbeam lower rail sliding connection, spindle motor locates second unit head sub-assembly anterior, backplate third direction driving motor output shaft with spindle motor outer wall screw connection, the spindle motor lower extreme is connected with the transmission of stirring head.
The embodiment of the invention has the following advantages:
the clamping device matched with friction stir welding equipment is arranged, so that when the lateral periphery of a cylindrical aluminum alloy workpiece is subjected to friction stir welding processing, two cylindrical aluminum alloy workpieces which are butted with each other are stably clamped, and the coaxiality in the welding process is ensured; meanwhile, the first extrusion cylinder and the first extrusion disc and the second extrusion cylinder and the second extrusion disc which are matched with each other are arranged, so that the workpiece can be separated from the first positioning shaft or the second positioning shaft by outwards extruding the workpiece after welding is finished, the mechanical stress generated by the machined workpiece is reduced, and the workpiece can be conveniently separated from the clamping device;
the friction stir welding clamping device is used in cooperation with existing gantry type two-dimensional multifunctional machine tool equipment and is specifically arranged on a machine tool body, so that a third shaft of the gantry type two-dimensional multifunctional machine tool equipment is added, the clamping device can move along the length direction of the machine tool body and rotate along the circumference of the central axis of the clamping device in a workpiece clamping state, the three-dimensional welding function of workpieces is achieved, and the technical blank is filled.
According to the invention, the existing gantry type two-position machine tool equipment is improved by arranging the clamping device, so that a three-dimensional welding function is realized, the application range is expanded, and the work efficiency of workpiece welding is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a front view of a friction stir welding fixture according to embodiment 1 of the present invention;
fig. 2 is a front view structural diagram of a three-dimensional welding apparatus provided in embodiment 2 of the present invention;
fig. 3 is a left side view structural diagram of a three-dimensional welding apparatus provided in embodiment 2 of the present invention;
in the figure:
1, a power mechanism; 101, a variable frequency motor; 102 a power box; 103 a reduction gearbox; 2 a first clamping mechanism; 201 a first stabilizing disc; 202 a first support frame; 203 a first support disc; 204 a first squeeze cylinder; 205 a first pressing disk; 206 a first positioning axis; 3 a second clamping mechanism; 301 a second stabilizing disk; 302 a second support frame; 303 a second support disk; 304 a second squeeze cylinder; 305 a second pressing plate; 306 a second positioning axis; 307 a fixing frame; 308, a sliding rail; 309 a slide seat; 4, a base; 5, mounting a frame; 6, driving a cylinder; 7 sliding the bracket; 8, a hydraulic station; 9, machining the lathe bed; 10 a drive device; 11 a machine tool table; 12 driving the guide rail; 13 driving a lead screw; 14 machine tool left column; 15 machine tool right column; 16 a machine tool cross member; 17 a first power head sub-assembly; 18 a second powerhead sub-assembly; 181 a spindle motor; 182 a backplane subassembly; 183 back plate third direction driving motor; 184 a stirring head; 19 machine tool beam upper guide rail; 20 machine tool beam lower guide rails; 21 a first power head second direction lead screw; 22 a first power head second direction drive motor; 23 a second power head second direction lead screw; 24 the second powerhead second direction drive motor.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
According to a first aspect of the embodiment of the invention, in order to cooperate with friction stir welding equipment, in particular to use three-dimensional welding equipment, a friction stir welding clamping device is specifically provided, as shown in fig. 1, which comprises a power mechanism 1, a first clamping mechanism 2, a second clamping mechanism 3 and a base 4, wherein the power mechanism 1, the first clamping mechanism 2 and the second clamping mechanism 3 are sequentially and fixedly installed on the base 4, the power mechanism 1 is in transmission connection with the first clamping mechanism 2, the power mechanism 1 provides power for the first clamping mechanism 2 to drive a cylindrical aluminum alloy workpiece to rotate, and the first clamping mechanism 2 drives the workpiece to rotate circularly. The first clamping mechanism 2 and the second clamping mechanism 3 are oppositely arranged, when the clamping mechanism is used, a cylindrical aluminum alloy workpiece is placed between the first clamping mechanism 2 and the second clamping mechanism 3, and the workpiece is stably clamped through the butt joint of the first clamping mechanism 2 and the second clamping mechanism 3.
In this embodiment, specifically, the first clamping mechanism 2 includes a first stabilizing disc 201, a first support frame 202, a first support disc 203, a first pressing cylinder 204, a first pressing disc 205, and a first positioning shaft 206. First stable dish 201, first supporting disk 203 and first extrusion dish 205 all are disc structure, and its middle part sets up the round hole, makes things convenient for first locating axle 206 to wear to establish, and is specific, first stable dish 201, first supporting disk 203 and first extrusion dish 205 are coaxial locating in proper order on the first locating axle 206. The first stabilizing disc 201 is fixedly connected with the first positioning shaft 206, and both the first stabilizing disc 201 and the first positioning shaft 206 perform circular motion under the driving of the power mechanism 1; the first supporting disc 203 and the first extrusion disc 205 are rotatably connected with the first positioning shaft 206, the outer edge of the lower portion of the first supporting disc 203 is fixedly connected with the upper end of the first supporting frame 202, and the lower end of the first supporting frame 202 is fixedly connected with the base 4, so that the first supporting frame 202 fixes the first supporting disc 203, stably supports the first supporting disc 203, and realizes stable rotation of the first positioning shaft 206. The plurality of first squeezing cylinders 204 are circumferentially and uniformly fixed on the side surface of the first supporting disk 203, and the output shafts of the first squeezing cylinders 204 slide through the first supporting disk 203 and abut against the side surface of the first squeezing disk 205. Specifically, the first pressing cylinder 204 is provided with 6 hydraulic cylinders, and is uniformly fixed on the side wall of the first supporting disk 203 by taking the central axis of the first supporting disk 203 as the center, the output shaft of the first pressing cylinder 204 can extend and retract on the first supporting disk 203, and the end part of the output shaft of the first pressing cylinder 204 is abutted against the first pressing disk 205, so that the stability of the abutment of the first pressing disk 205 and the end part of a workpiece is ensured, and the stability of clamping the workpiece is further ensured.
In order to ensure the quality of friction stir welding, the inner diameter of the first positioning shaft 206 is equal to that of the cylindrical workpiece, so that the coaxiality of the two workpieces is ensured in the process that the clamping device drives the workpieces to rotate. During machining, mechanical stress is generated between the first positioning shaft 206 and the inner wall of the workpiece, and the workpiece is difficult to be detached from the first positioning shaft 206. The first extrusion cylinder 204 and the first extrusion disc 205 are arranged, an output shaft of the first extrusion cylinder 204 extends outwards to extrude the first extrusion disc 205, so that the first extrusion disc 205 generates displacement along the first positioning shaft 206, the end part of a workpiece is further extruded, the workpiece generates displacement relative to the first positioning shaft 206 under the extrusion action of the first extrusion disc 205, the workpiece is taken off from the first positioning shaft 206, and the machining process is completed.
In this embodiment, specifically, the second clamping mechanism 3 includes a second stabilizing plate 301, a second supporting frame 302, a second supporting plate 303, a second pressing cylinder 304, a second pressing plate 305, a second positioning shaft 306, a fixed frame 307, a sliding rail 308 and a sliding base 309, and the second stabilizing plate 301, the second supporting plate 303 and the second pressing plate 305 all adopt a disc-shaped structure, corresponding to the relevant components on the first clamping mechanism 2. Specifically, second stable dish 301, second supporting disk 303 and second extrusion dish 305 coaxial locate in proper order on the second location axle 306, second stable dish 301 with second location axle 306 fixed connection, when first fixture 2 and second fixture 3 step up the work piece simultaneously, under the drive of first fixture 2, second stable dish 301 and second location axle 306 circumferential direction simultaneously. The second supporting plate 303 and the second pressing plate 305 are rotatably connected to the second positioning shaft 306, the outer edge of the lower portion of the second supporting plate 303 is fixedly connected to the upper end of the first supporting frame 202, the second supporting frame 302 has a supporting effect on the second supporting plate 303, the lower end of the second supporting frame 302 is in sliding contact with the upper end of the sliding seat 309, and in use, the second supporting frame 302 can drive the second supporting plate 303 to axially move along the second positioning shaft 306.
The plurality of second squeezing cylinders 304 are circumferentially and uniformly fixed on the side surface of the second support plate 303, the output shafts of the second squeezing cylinders 304 slide through the second support plate 303 and abut against one side surface of the second stabilizing plate 301, specifically, the second squeezing cylinders 304 are 6 hydraulic cylinders, and are uniformly fixed on the side wall of the second support plate 303 with the central axis of the second support plate 303 as the center, the output shafts of the second squeezing cylinders 304 can extend and retract on the second support plate 303, and the end parts of the output shafts of the second squeezing cylinders 304 abut against the second stabilizing plate 301. When the clamping device is used, after the end part of the output shaft of the second extrusion cylinder 304 is abutted against the second stabilizing disc 301, the second supporting disc 303 is abutted against the second extrusion disc 305, so that the stability of the abutment of the second extrusion disc 305 and the end part of a workpiece is ensured, and the stability of clamping the workpiece is further ensured.
In order to ensure the quality of friction stir welding, the inner diameter of the second positioning shaft 306 is equal to that of the cylindrical workpiece, so that the coaxiality of the two workpieces is ensured in the process that the clamping device drives the workpieces to rotate. During machining, mechanical stress is generated between the second positioning shaft 306 and the inner wall of the workpiece, and the second positioning shaft 306 is difficult to detach. The second extrusion cylinder 304, the second stable plate 301 and the second extrusion plate 305 are arranged, an output shaft of the second extrusion cylinder 304 extends outwards to extrude the second stable plate 301, so that the second support plate 303 reversely extrudes the second extrusion plate 305, the second extrusion plate 305 displaces along the second positioning shaft 306, the end part of a workpiece is further extruded, the workpiece displaces relative to the second positioning shaft 306 under the extrusion action of the second extrusion plate 305, the workpiece is taken off from the second positioning shaft 306, and the machining process is completed.
Since the first clamping mechanism 2 is fixedly mounted on the slide 309, in order to clamp the workpiece between the first clamping mechanism 2 and the second clamping mechanism 3, the second clamping mechanism 3 needs to slide and abut against the first clamping mechanism 2. Specifically, be equipped with mount 307 on the second stable dish 301 another side, mount 307 lower extreme with slide 309 fixed connection, mount 307 provides the fixed stay for second fixture 3 on slide 309, slide rail 308 is fixed to be located 4 up end of base, slide 309 slides and locates on the slide rail 308. Therefore, in use, the second clamping mechanism 3 slides on the slide rail 308 through the slide seat 309, and the butt joint of the second clamping mechanism 3 and the first clamping mechanism 2 is realized.
In order to realize the automatic sliding of second fixture 3 on slide rail 308, further, still include mounting bracket 5 and drive actuating cylinder 6, mounting bracket 5 is fixed to be located on base 4, mounting bracket 5 is located slide rail 308 tip, it transversely locates to drive actuating cylinder 6 on the mounting bracket 5, the actuating lever tip fixed connection that drives actuating cylinder 6 mount 307, the actuating lever with second location axle 306 sets up the coaxial line. During the use, when needing first fixture 2 and second fixture 3 to carry out the centre gripping to the work piece, promote slide 309 along slide rail 308 and slide through the actuating lever that drives actuating cylinder 6, make second fixture 3 be close to first fixture 2, and when finishing using and need take off the work piece from first fixture 2 and second fixture 3, drive slide 309 along slide rail 308 through the actuating lever that drives actuating cylinder 6 and slide, make second fixture 3 keep away from first fixture 2 gradually.
In this embodiment, the power mechanism 1 provides a rotational driving force to the first clamping mechanism 2. Specifically, the power mechanism 1 comprises a variable frequency motor 101, a power box 102 and a reduction box 103, wherein the variable frequency motor 101 is connected with the power box 102 in a transmission manner, a power head is arranged in the power box 102, and an output shaft of the variable frequency motor 101 is connected with the power head in a transmission manner, so that rotating force is realized. The power box 102 is in transmission connection with the reduction box 103, specifically, a speed reduction motor is arranged in the reduction box 103, and the reduction box 103 is in transmission connection with the first stabilizing disc 201, so that the first stabilizing disc 201 is in transmission connection with the speed reduction motor in the reduction box 103 to drive the stabilizing disc to axially rotate.
In order to realize the coaxiality of the workpieces in the welding process, the workpiece welding device further comprises a sliding bracket 7, wherein the sliding bracket 7 is fixedly arranged at the upper end of the base 4, and the sliding bracket 7 is arranged between the first clamping mechanism 2 and the second clamping mechanism 3. Specifically, 7 lower extremes of sliding bracket are the pillar, and the upper end is an arc bearing, the lower extreme middle part and the pillar upper end fixed connection of arc bearing, and this arc bearing has just set up the gyro wheel structure along the horizontal setting of base 4 on the arc bearing. When the welding device is used, the sliding bracket 7 stably supports a workpiece and cannot deviate in the friction stir welding process, so that the coaxiality of the welded workpiece is ensured. It is further preferred that the sliding carriage 7 is arranged to support the abutment of two workpieces.
In this embodiment, the first squeezing cylinder 204 and the second squeezing cylinder 304 are both in a hydraulic cylinder structure, and further, the hydraulic station 8 is further included, and the first squeezing cylinder 204 and the second squeezing cylinder 304 are connected to the hydraulic station 8 through a pipeline. In use, the first and second squeeze cylinders 204, 304 are extended and retracted by supplying high pressure oil to the first and second squeeze cylinders 204, 304 via the hydraulic station 8.
The friction stir welding clamping device is used as follows:
in the embodiment, two workpieces are welded and fixed through friction stir welding, the end part of the first workpiece is provided with a flange structure, the flange structure is annularly arranged along the thickness direction of the first workpiece, the end part of the second workpiece is provided with a groove structure corresponding to the flange structure, and the first workpiece and the second workpiece are welded after the groove structure and the flange structure are butted. Before friction stir welding, a workpiece to be connected is clamped and fixed through a clamping device, and the method comprises the following specific steps:
firstly, sleeving a first end part of a first workpiece on a first positioning shaft 206 in a horizontal state, erecting a flange structure at a second end part of the first workpiece on the upper end of a sliding bracket 7, butting one end of a second workpiece with a groove structure with one end of the flange structure of the first workpiece, and attaching the joint of the first workpiece and the second workpiece to each other, wherein the first workpiece and the second workpiece are coaxially arranged;
secondly, the output shaft of the driving cylinder 6 extends outwards and pushes the second clamping mechanism 3 on the sliding seat 309 to move towards the first clamping mechanism 2, the second positioning shaft 306 is gradually inserted into the inner cavity of the end part of the second workpiece, and the driving cylinder 6 is closed after the end surface of the second extrusion plate 305 is contacted with the end part of the second workpiece, and at the moment, the first workpiece is also contacted with the end surface of the first extrusion plate 205;
then, the hydraulic station 8 supplies high-pressure oil to the first squeezing cylinder 204 and the second squeezing cylinder 304, at this time, the output shaft of the first squeezing cylinder 204 tightly presses against the first squeezing disk 205, and the first squeezing disk 205 tightly presses against the first workpiece; meanwhile, the output shaft of the second extrusion cylinder 304 tightly presses against the second stabilizing disc 301, the second supporting disc 303 extrudes the second extrusion disc 305, and the second extrusion disc 305 extrudes and tightly presses against the second workpiece, so that the first workpiece and the second workpiece are stably clamped through the matching of the first clamping mechanism 2 and the second clamping mechanism 3;
and (3) welding: the stirring head 184 of the friction stir welding extends into the joint of the first workpiece and the second workpiece, and meanwhile, the power mechanism 1 drives the first positioning shaft 206 on the first clamping mechanism 2 to rotate, so that the first workpiece and the second workpiece rotate circumferentially, and the first workpiece and the second workpiece are connected in the circumferential rotation process;
finally, when the welding of the first workpiece and the second workpiece is completed, the hydraulic station 8 relieves the pressure of the first pressing cylinder 204 and the second pressing cylinder 304, and reduces the pressing stress of the first pressing disk 205 and the second pressing disk 305 on the workpieces. The driving cylinder 6 drives the second clamping mechanism 3 to move backwards, then, the hydraulic station 8 supplies high-pressure oil to the first extrusion cylinder 204 and the second extrusion cylinder 304, pushes the welded workpiece to be detached from the first positioning shaft 206 and the second positioning shaft 306, and takes down the welded workpiece to complete the welding process.
The clamping device matched with the friction stir welding equipment is used for stably clamping two cylindrical aluminum alloy workpieces which are butted with each other when the lateral peripheries of the cylindrical aluminum alloy workpieces are subjected to friction stir welding processing, so that the coaxiality in the welding process is ensured; meanwhile, the first extrusion cylinder 204 and the first extrusion disc 205, and the second extrusion cylinder 304 and the second extrusion disc 305 which are matched with each other are arranged, so that the workpiece can be separated from the first positioning shaft 206 or the second positioning shaft 306 by outwards extruding the workpiece after welding is completed, the mechanical stress generated by the machined workpiece is reduced, and the workpiece can be conveniently separated from the clamping device.
Example 2
According to a second aspect of the embodiment of the invention, the friction stir welding clamping device is applied to the three-dimensional welding equipment, and particularly, the friction stir welding clamping device is arranged on the existing gantry type two-dimensional multifunctional machine tool equipment, so that a third shaft of the gantry type two-dimensional multifunctional machine tool equipment is added, and a three-dimensional welding function is realized. Specifically, as shown in fig. 2 and 3, the power head device further includes a machine tool bed 9, a driving device 10, a machine tool workbench 11, a driving guide rail 12, a driving lead screw 13, a machine tool left column 14, a machine tool right column 15, a machine tool cross beam 16, a first power head sub-assembly 17, and a second power head sub-assembly 18. The driving device 10 is fixedly arranged at the rear end of the machine tool body 9, a driving guide rail 12 and a driving lead screw 13 are arranged at the upper end of the machine tool body 9, the end of the driving lead screw 13 is in transmission connection with the driving device 10, the machine tool workbench 11 is arranged on the driving guide rail 12 in a sliding mode, namely, the driving lead screw 13 is driven to rotate through the driving device 10, so that the machine tool workbench 11 slides along the driving guide rail 12, the friction stir welding clamping device is fixedly arranged on the machine tool workbench 11, the friction stir welding clamping device can slide back and forth along with the machine tool workbench 11, the position of a workpiece clamped by the friction stir welding clamping device is adjusted, and the workpiece is conveniently welded by the stirring head 184. The main body of the three-dimensional welding equipment is of a gantry structure, specifically, the left column 14 of the machine tool is arranged on the left side of the machine tool body 9, the right column 15 of the machine tool is arranged on the right side of the machine tool body 9, the cross beam 16 of the machine tool stretches over the machine tool body 9, and two ends of the cross beam 16 of the machine tool are fixedly connected with the upper ends of the left column 14 of the machine tool and the right column 15 of the machine tool respectively. The first power head sub-assembly 17 and the second power head sub-assembly 18 are arranged on the machine tool beam 16 in a transverse sliding mode, when the welding machine is used, one of the first power head sub-assembly 17 or the second power head sub-assembly 18 is used for friction stir welding, the first power head sub-assembly 17 or the second power head sub-assembly 18 slides along the machine tool beam 16, and after the first power head sub-assembly 17 or the second power head sub-assembly 18 slides in place, the stirring head 184 achieves welding work on workpieces.
In this embodiment, the first power head sub-assembly 17 and the second power head sub-assembly 18 both move along a guide rail disposed on the machine tool cross beam 16, and specifically, the power head further includes a machine tool cross beam upper guide rail 19, a machine tool cross beam lower guide rail 20, a first power head second direction lead screw 21, a first power head second direction driving motor 22, a second power head second direction lead screw 23, and a second power head second direction driving motor 24 disposed on the machine tool cross beam 16, the machine tool beam upper guide rail 19 is arranged at the upper end of the machine tool beam 16, the machine tool beam lower guide rail 20 is arranged at the lower end of the machine tool beam 16, the first power head second direction screw 21 is arranged below the machine tool beam upper guide rail 19, the second power head second direction lead screw 23 is arranged above the machine tool beam lower guide rail 20, and specifically, the first power head second direction lead screw 21 is arranged above the second power head second direction lead screw 23. First unit head second direction lead screw 21 left end transmission is connected first unit head second direction driving motor 22, second unit head second direction lead screw 23 right-hand member transmission is connected second unit head second direction driving motor 24, first unit head divides assembly 17 to follow first unit head second direction lead screw 21 slides and locates on lathe crossbeam upper rail 19 and lathe crossbeam lower rail 20, second unit head divides assembly 18 to follow second unit head second direction lead screw 23 slides and locates on lathe crossbeam lower rail 20 and the lathe crossbeam upper rail 19. Therefore, the upper guide rail 19 of the machine tool beam and the lower guide rail 20 of the machine tool beam provide guidance for the first power head sub-assembly 17 and the second power head sub-assembly 18 to slide left and right on the machine tool beam 16, so that the first power head sub-assembly 17 and the second power head sub-assembly 18 can be adjusted in the transverse position of the machine tool body 9, the friction stir welding position can be determined, and the workpiece can be accurately welded.
In this embodiment, further, the first power head sub-assembly 17 and the second power head sub-assembly 18 have the same structure, and in use, only the output power of the first power head sub-assembly 17 and the output power of the second power head sub-assembly 18 are distinguished, so as to meet the requirements of processing workpieces with different thicknesses, but the working modes are the same. The description is given with reference to the second power head sub-assembly 18:
the second power head sub-assembly 18 comprises a spindle motor 181, a back plate sub-assembly 182, a back plate third direction driving motor 183 and a stirring head 184, the back plate sub-assembly 182 is arranged at the rear part of the second power head sub-assembly 18, as shown in the figure, the back plate sub-assembly 182 is in screw connection with a second power head second direction screw 23, the back plate sub-assembly 182 is in sliding connection with a machine tool beam upper guide rail 19 and a machine tool beam lower guide rail 20, and the second power head sub-assembly 18 is driven to move along the second power head second direction screw 23 through the back plate sub-assembly 182. Backplate third direction driving motor 183 locates the upper portion of backplate subassembly 182, and backplate third direction driving motor 183 is fixed connection with backplate subassembly 182, and the output shaft of backplate third direction driving motor 183 is vertical downwards, spindle motor 181 is located second unit head subassembly 18 front portion, backplate third direction driving motor 183 output shaft with spindle motor 181 outer wall screw connection, as shown in the figure, spindle motor 181 can rise in vertical direction under the drive of backplate third direction driving motor 183 output shaft to realized spindle motor 181's vertical adjustment, realized that stirring head 184 stretches into the adjustment of the work piece degree of depth, spindle motor 181 lower extreme and stirring head 184 transmission are connected.
The three-dimensional welding equipment provided by the embodiment of the invention is used in the following process:
the device is a three-dimensional welding device with double power head operation function, the output power of the three-dimensional welding device is different, the three-dimensional welding device is a friction stir welding power head, and particularly, the device is gantry type friction stir welding double welding head equipment which aims at three-dimensional welding of an aluminum alloy material workpiece, guarantees stability and accuracy of product welding and avoids deformation in a welding process. The main part of three-dimensional welding equipment in this application document is planer-type two-dimensional friction stir welding's two-weld head equipment, and is unanimous with my company's authorized utility model patent (patent number 2017205162641, the patent name is "a two-weld head equipment to planer-type two-dimensional friction stir welding"), and the three-dimensional welding equipment of this application is the improvement of going on this planer-type two-dimensional friction stir welding's two-weld head equipment, has increased clamping device and has realized three-dimensional welding function.
A machine tool body 9 of the device is a welding structural part and is arranged in the middle of a left upright post and a right upright post of the machine tool in order to ensure the working precision and eliminate welding stress, four driving guide rails 12 for driving a machine tool workbench 11 are arranged on the machine tool body 9, a driving lead screw 13 along the X axial direction is arranged in the middle of the driving guide rails 12, and further, a steel plate protective cover is arranged on the machine tool body 9 to ensure the driving guide rails 12 and the driving lead screw 13 to run more stably; the machine table 11 is a casting, which is arranged on the upper part of the machine bed 9. Specifically, 16 sliding blocks are arranged on two sides of the bottom of a machine tool workbench 11 and connected with four driving guide rails 12, and a lead screw nut is fixedly connected in the middle of the bottom of the machine tool workbench 11 and connected with a machine tool body 9X axial driving lead screw 13, so that the workbench can move back and forth along the axial direction of the machine tool body X; clamping device sets up on machine tool workstation 11 to machine tool workstation 11 has driven clamping device at the axial removal of X when X axial displacement, and has driven first fixture 2 through power unit 1 and rotate, has realized the rotation of third axial, realizes three-dimensional welding operation when welding.
The left column 14 and the right column 15 are welded structural members and are arranged on the left side and the right side of the machine tool body 9. The lower parts of the left and right columns of the machine tool are fixedly connected with the two sides of the machine tool respectively, and the tops of the left and right columns of the machine tool are fixedly connected with the bottom of the cross beam respectively to form a gantry structure; the machine tool cross member 16 is also a welded structure member, which is arranged above the machine tool. The two sides of the bottom of the machine tool beam 16 are fixedly connected with the tops of the left and right columns of the machine tool respectively, and in addition, a machine tool beam upper guide rail 19, a machine tool beam lower guide rail 20, a first power head second direction lead screw 21 and a second power head second direction lead screw 23 are also arranged on the machine tool beam 16; in the embodiment, the spindle motor 181 adopts a power head spindle water-cooling variable frequency motor 101, and drives the stirring head 184 to have the running power of 30-60 Kw. The spindle motor 181 adopts water-cooling circulation to dissipate heat to ensure powerful motor power dissipation, and stepless speed regulation of the spindle can be realized through frequency conversion.
Since the first power head sub-assembly 17 and the second power head sub-assembly 18 have the same structure and working mode, the second power head sub-assembly 18 is taken as an example to describe the use process: the back plate third direction driving motor 183 is connected to the back plate subassembly 182 and runs left and right along the Y-axis, a servo motor connected to a speed reducer installed in the machine tool cross beam 16 drives the back plate subassembly 182 to rotate through a ball screw, and drives a screw nut at the rear part of the back plate subassembly 182, so that the back plate subassembly 182 and guide rails on the upper side and the lower side of the machine tool cross beam 16 run along the Y-axis; similarly, the spindle motor 181Z moves up and down in the axial direction, and the servo motor installed in front of the back plate subassembly 182 is connected with the speed reducer to drive the ball screw to rotate, so as to drive the screw nut fixedly connected to the rear portion of the spindle motor 181, and thus the spindle motor 181 drives the output shaft of the motor 183 in the third direction of the back plate to vertically realize Z-axis movement. The spindle motor 181 drives the stirring head 184 to rotate, so as to realize friction welding of the workpiece.
The operation steps are divided into three stages, namely start-up preparation work, equipment operation stage and equipment shutdown work.
Firstly, starting preparation:
1. when the main power line of the driving device 10 of the machine tool workbench 11 is connected with a power supply system, the connection between the ground wire and the zero line is determined to be correct, and then the power can be supplied.
2. And (3) turning a power supply main switch on a driving device 10 of the machine tool workbench 11 to a position of 0N, and powering on the equipment.
3. And when the operation interface is started, the emergency stop switch is released, the system start key and the reset key are pressed, and the system is powered on and enabled.
II, equipment operation stage:
1. and switching on the power supply of the machine tool. And after the system is started, the system enters a machining operation area operation mode, returns to a reference point, prepares for the machine tool to execute a program in an automatic mode, and simultaneously measures the cutter, measures the workpiece and defines the zero offset applicable to the program by using the system function.
2. The machine tool can be debugged, namely, the movement on the machine tool can be manually triggered through the specified keys and the hand wheel on the control board surface of the machine tool.
3. The shaft is positioned, i.e., the shaft can be moved to a specific position for performing a simple machining operation.
4. When the program is interrupted, the coordinate axis is manually moved, and besides, the movement of the axis is realized by operating a JOG key on the plate surface, the movement positioning and other operations of the axis can also be realized by a universal hand wheel.
5. In the welding process, in order to adjust the pressing amount of the stirring head 184, the shaft can be manually offset;
the method comprises the following steps:
A. and executing the automatic operation of the handheld unit to enable the program to run.
B. And selecting the key corresponding to the Z to press according to the display window.
C. And pressing a hand wheel selection key to select proper hand-operated pulse multiplying power.
D. When the Z needs to be displaced downwards or upwards, the enabling switch is pressed, the hand-operated pulse generator is moved towards the positive or negative direction by one pulse and one slow shaking of the pulse, and the Z can be displaced upwards or downwards by the position of the equivalent pulse.
E. After the use of the offset function, the offset function is canceled by pressing the operation mode key.
F. If the offset value between the workpiece coordinate system and the machine coordinate system is cancelled, a command can be added to the program.
Thirdly, equipment shutdown step:
when the equipment is completely welded and operated, the equipment needs to be shut down, and the shutdown steps are as follows:
1. it is checked whether the movement of each axis is finished.
2. Turn the device on in the safe position and cancel each axis enable, press the scram button on the control panel.
3. The system is completely powered OFF, and the knob selection switch on the control cabinet is turned to the OFF position.
The equipment is a gantry type friction stir welding equipment with double power heads, and has 8 shafts, namely an X shaft, a Y1 shaft, a Y2 shaft, a Z1 shaft, a Z2 shaft, an SP shaft, a C1 shaft and a C2 shaft. The Z2 axis, the Y2 axis and the C2 axis are second power heads parallel to the Z1 axis, the Y1 axis and the C1 axis, the first power head is a linear power head, and the second power head is a curve power head. Wherein a first direction screw rod of a machine tool workbench 11 is an X direction screw rod, a second direction screw rod of a linear power head is a Y direction screw rod of a linear power head, a second direction screw rod of a curve power head is a Y direction screw rod of a curve power head, a third direction driving motor 183 of a backboard of the linear power head is a Z direction driving device 10 of a backboard of the linear power head, a second direction driving motor of the linear power head is a Y direction driving device 10 of the linear power head, a third direction driving motor 183 of a backboard of the curve power head is a Z direction driving device 10 of the curve power head, a second direction driving motor of the curve power head is a Y direction driving device 10 of the curve power head, a Z1 shaft, a Y1 shaft and a C1 shaft are matched in the linear power head, the spindle water-cooling frequency conversion motor has strong power of 60Kw, the function of penetrating through stirring friction linear welding aluminum alloy materials with the thickness, The C2 shaft and the SP shaft are matched in a curve power head, and the characteristic is that the main shaft realizes various curve friction stir welding functions through the added SP shaft structure and performance. The main shaft water-cooling variable frequency motor 101 has the power of 30Kw and has the function of welding an aluminum alloy material with the thickness of 20mm by a penetrating friction stir curve; the X axis is adapted in the workbench of the lathe bed, has the function of driving the workpiece to reciprocate along the X direction and is matched with the power head to complete the step of welding the workpiece. It should be noted that the output powers of the linear power head and the curve power head can be adjusted and the stirring head 184 can be replaced according to actual needs.
Because the linear power head and the curve power head share the same workbench, the X axis belongs to a shared axis. When the machine tool runs, only one power head (a linear power head sub-assembly or a curve power head sub-assembly) can participate in the running, and when a second power head (the linear power head sub-assembly or the curve power head sub-assembly) needs to be called to carry out program running for welding, the shaft needs to be converted through a coordinate shaft. The geometric axis conversion is carried out through a program, and the geometric axis conversion can also be carried out manually through a key, so that the current power head (a linear power head sub-assembly or a curve power head sub-assembly) is considered to be effective. For safety reasons, when operating one of the powerheads, the other workhead must be in a zero position.
The friction stir welding clamping device is used in cooperation with existing gantry type two-dimensional multifunctional machine tool equipment and is specifically arranged on the machine tool body 9, so that a third shaft of the gantry type two-dimensional multifunctional machine tool equipment is added, the clamping device can move along the length direction of the machine tool body 9 and rotate circumferentially along the central axis of the clamping device in a workpiece clamping state, a three-dimensional welding function of workpieces is achieved, and the technical blank is filled. According to the invention, the existing gantry type two-position machine tool equipment is improved by arranging the clamping device, so that a three-dimensional welding function is realized, the application range is expanded, and the work efficiency of workpiece welding is improved.
Meanwhile, the double power heads (the first power head sub-assembly 17 and the second power head sub-assembly 18) have the advantages that a single power head has double equipment and has the performance and the function, namely, the double power head has the straight welding of deep-seam workpieces and the curve welding of common thickness. The invention fully achieves the ideal effects of reasonable application, thickness consideration and comprehensive functions, greatly reduces the unfavorable hidden danger of reactive loss or overload operation and brings obvious economical efficiency and practicability.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A friction stir welding clamping device is characterized by comprising a power mechanism, a first clamping mechanism, a second clamping mechanism and a base, wherein the power mechanism, the first clamping mechanism and the second clamping mechanism are sequentially and fixedly arranged on the base;
the first clamping mechanism comprises a first stabilizing disc, a first supporting frame, a first supporting disc, a first extruding cylinder, a first extruding disc and a first positioning shaft, the first stabilizing disc, the first supporting disc and the first extruding disc are sequentially and coaxially arranged on the first positioning shaft, the first stabilizing disc is fixedly connected with the first positioning shaft, the first supporting disc and the first extruding disc are rotatably connected with the first positioning shaft, the outer edge of the lower part of the first supporting disc is fixedly connected with the upper end of the first supporting frame, the lower end of the first supporting frame is fixedly connected with the base, the first extruding cylinders are uniformly fixed on the side surface of the first supporting disc in the circumferential direction, and the output shaft of the first extruding cylinder penetrates through the first supporting disc in a sliding manner and abuts against the side surface of the first extruding disc;
the second clamping mechanism comprises a second stabilizing disc, a second supporting disc, a second extruding cylinder, a second extruding disc, a second positioning shaft, a fixing frame, a sliding rail and a sliding seat, the second stabilizing disc, the second supporting disc and the second extruding disc are sequentially and coaxially arranged on the second positioning shaft, the second stabilizing disc is fixedly connected with the second positioning shaft, the second supporting disc and the second extruding disc are rotatably connected with the second positioning shaft, the outer edge of the lower part of the second supporting disc is fixedly connected with the upper end of the first supporting disc, the lower end of the second supporting disc is in sliding contact with the upper end of the sliding seat, a plurality of second extruding cylinders are uniformly fixed on the side surface of the second supporting disc in the circumferential direction, the output shaft of the second extruding cylinder penetrates through the second supporting disc in a sliding manner and abuts against one side surface of the second stabilizing disc, and the fixing frame is arranged on the other side surface of the second stabilizing disc, the lower end of the fixing frame is fixedly connected with the sliding seat, the sliding rail is fixedly arranged on the upper end face of the base, and the sliding seat is slidably arranged on the sliding rail.
2. The friction stir welding clamping device of claim 1, further comprising a mounting bracket and a driving cylinder, wherein the mounting bracket is fixedly arranged on the base, the mounting bracket is arranged at the end of the slide rail, the driving cylinder is transversely arranged on the mounting bracket, the end of a driving rod of the driving cylinder is fixedly connected with the mounting bracket, and the driving rod and the second positioning shaft are coaxially arranged.
3. The friction stir welding clamping device of claim 2 wherein the power mechanism comprises a variable frequency motor, a power box and a reduction gearbox, the variable frequency motor is in transmission connection with the power box, the power box is in transmission connection with the reduction gearbox, and the reduction gearbox is in transmission connection with the first stabilizing disc.
4. The friction stir welding clamping device of claim 3 further comprising a sliding bracket fixedly disposed at the upper end of the base, the sliding bracket being disposed between the first clamping mechanism and the second clamping mechanism.
5. The friction stir welding clamping apparatus of claim 4 further comprising a hydraulic station, wherein the first and second squeeze cylinders are connected to the hydraulic station by a conduit.
6. A three-dimensional welding device, which applies the friction stir welding clamping device of any one of claims 1 to 5, and is characterized by further comprising a machine tool body, a driving device, a machine tool workbench, a driving guide rail, a driving screw, a machine tool left column, a machine tool right column, a machine tool cross beam, a first power head sub-assembly and a second power head sub-assembly, wherein the driving device is fixedly arranged at the rear end of the machine tool body, the driving guide rail and the driving screw are arranged at the upper end of the machine tool body, the end part of the driving screw is in transmission connection with the driving device, the machine tool workbench is arranged on the driving guide rail along the driving screw in a sliding manner, the machine tool left column is arranged at the left side of the machine tool body, the machine tool right column is arranged at the right side of the machine tool body, the machine tool cross beam spans over the machine tool body, and two ends of the machine tool cross beam are respectively and fixedly connected with, the first power head sub-assembly and the second power head sub-assembly are arranged on the cross beam of the machine tool in a transverse sliding mode, and the friction stir welding clamping device is fixedly arranged on the workbench of the machine tool.
7. The three-dimensional welding device according to claim 6, further comprising an upper cross beam guide rail, a lower cross beam guide rail, a first power head second direction screw, a first power head second direction drive motor, a second power head second direction screw and a second power head second direction drive motor, which are disposed on the cross beam of the machine tool, wherein the upper cross beam guide rail is disposed at the upper end of the cross beam of the machine tool, the lower cross beam guide rail is disposed at the lower end of the cross beam of the machine tool, the first power head second direction screw is disposed below the upper cross beam guide rail of the machine tool, the second power head second direction screw is disposed above the lower cross beam guide rail of the machine tool, the left end of the first power head second direction screw is in transmission connection with the first power head second direction drive motor, the right end of the second power head second direction screw is in transmission connection with the second power head second direction drive motor, the first power head sub-assembly is arranged on the upper guide rail of the machine tool beam and the lower guide rail of the machine tool beam along the screw rod in the second direction of the first power head, and the second power head sub-assembly is arranged on the lower guide rail of the machine tool beam and the upper guide rail of the machine tool beam along the screw rod in the second direction of the second power head.
8. The three-dimensional welding device according to claim 7, wherein the first power head subassembly and the second power head subassembly have the same structure, the second power head subassembly includes a spindle motor, a back plate subassembly, a back plate third direction driving motor and a stirring head, the back plate subassembly is arranged at the rear part of the second power head subassembly, the back plate third direction driving motor is arranged at the upper part of the back plate subassembly, the back plate subassembly is slidably connected with an upper guide rail of a machine tool beam and a lower guide rail of the machine tool beam, the spindle motor is arranged at the front part of the second power head subassembly, an output shaft of the back plate third direction driving motor is connected with a lead screw on the outer wall of the spindle motor, and the lower end of the spindle motor is in transmission connection with the stirring head.
CN201910610324.XA 2019-07-08 2019-07-08 Friction stir welding clamping device and three-dimensional welding equipment Active CN110202253B (en)

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