CN110977230A - Flexible assembly welding device for thin-walled parts - Google Patents
Flexible assembly welding device for thin-walled parts Download PDFInfo
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- CN110977230A CN110977230A CN201911395453.8A CN201911395453A CN110977230A CN 110977230 A CN110977230 A CN 110977230A CN 201911395453 A CN201911395453 A CN 201911395453A CN 110977230 A CN110977230 A CN 110977230A
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- 238000003466 welding Methods 0.000 title claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 112
- 238000003825 pressing Methods 0.000 claims abstract description 68
- 238000013459 approach Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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Abstract
The invention discloses a flexible assembly welding device of a thin-walled piece, which comprises a rack, a three-jaw chuck mechanism, a linkage clamping mechanism and an inner wall pressing mechanism, wherein the rack comprises a plurality of cylindrical vertical rods, a cross beam for connecting the vertical rods together and vertical columns positioned among the vertical rods, the three-jaw chuck mechanism is arranged at the bottom side in the rack and used for tensioning the thin-walled piece arranged in the rack, the linkage clamping mechanism is connected with the vertical rods and used for clamping the outer side of the thin-walled piece in the rack, and the inner wall pressing mechanism is connected with the vertical columns and used for pressing the thin-walled piece arranged in the rack. The flexible welding device can realize the automatic centering of thin-wall parts such as a mixing drum and the like, and reduce the positioning deviation; the flexible welding device is suitable for tank bodies with different external dimensions, and can realize flexible welding of thin-walled parts; the misalignment amount between the tank bodies is effectively controlled, and the automatic welding of the subsequent mixing drum is smoothly realized; the structure is light and convenient for maintenance.
Description
Technical Field
The invention belongs to the technical field of machinery, and particularly relates to a welding device for thin-walled parts.
Background
The thin-wall part needs to be clamped and kept stable in the machining process, and for example, a spherical tank needs to be clamped and then welded in the production process of the mixing drum. Because the thin-walled piece is thin, deformation is easily generated due to external pressure in the clamping process, and therefore machining precision is affected. The clamping device in the prior art is heavy in overall structure, a workpiece cannot be self-centered, and the outer wall of a thin-wall part is easily damaged.
In the welding and manufacturing process of the mixing drum, a birdcage type or squirrel cage type tool is basically adopted in the industry at present, the drum bodies of all the sections of the mixing drum are forcibly extruded together by a fixed tool (also the size of the mixing drum is not adjustable), and then integral spot welding and integral conveying are carried out, so that the consistency of assembly welding seams of all the sections of the drum bodies of the mixing drum is ensured. The welding device has the following disadvantages: the fixed tool is complex in structure, heavy in transportation, incapable of flexible production and incapable of controlling the amount of misalignment.
In view of the above, it is desirable to provide a flexible welding device for thin-wall parts to solve the problems in the prior art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a flexible welding set of thin wall spare to solve the technical problem that the welding set who adopts fixed frock among the prior art exists that the structure is complicated, the transportation is heavy, can't the flexible production, can't control the misalignment volume etc..
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a flexible assembly welding device of thin wall spare, includes frame, three-jaw chuck mechanism, linkage clamping mechanism and inner wall hold-down mechanism, the frame is including enclosing into many montants of tube-shape, with many the crossbeam that the montant links together and be located the stand between many montants, three-jaw chuck mechanism set up in the inside bottom side of frame, be used for the tensioning to arrange in the inside thin wall spare of frame, linkage clamping mechanism with the montant is connected linkage clamping mechanism is used for from pressing from both sides tightly the outside of the inside thin wall spare of frame, inner wall hold-down mechanism with the stand is connected, is used for from compressing tightly arranging in the inside thin wall spare of frame. When the flexible welding device is used for welding production of thin-walled parts, the three-jaw chuck mechanism tensions the bottom side of the thin-walled part, the linkage clamping mechanism clamps the outer side of the thin-walled part, the position of the inner wall pressing mechanism on the stand column can be adjusted, so that the inner wall pressing mechanism is adjusted, pressure is applied to the inner side position corresponding to the outer side pressing point of the thin-walled part to position the thin-walled part, then spot welding is carried out on two sides near the inner pressing point and the outer pressing point of the thin-walled part, the position of the inner wall pressing mechanism is adjusted to be matched with other outer side pressing points respectively after spot welding is completed, and welding work is completed one.
Preferably, the three-jaw chuck mechanism comprises a mounting seat, a chuck body, at least two jaws and a driving rod, wherein the mounting seat is fixed at the bottom side inside the frame, the chuck body is fixed at the top side of the mounting seat, the jaws are movably connected at the top side of the chuck body, and one end of the driving rod is connected with the chuck body and drives the jaws to be close to or far away from each other.
Preferably, inner wall hold-down mechanism includes mounting panel 601, power pack, compresses tightly the piece, the adjustable perpendicular connection of mounting panel 601 is in on the stand, two power pack installs respectively the both ends of mounting panel 601, it is fixed with power pack's end to compress tightly the piece, two power pack drives two it is close to each other or keeps away from to compress tightly the piece. The vertical height of the inner wall pressing mechanism can be adjusted by adjusting the position of the mounting plate 601 on the upright column, and the inner wall pressing mechanism can press and loosen the thin-walled part by driving the pressing part to move in the horizontal direction through the power unit. When the power unit pushes the pressing pieces to be away from each other, the two pressing pieces are respectively pressed to the inner side surfaces of the thin-wall pieces, and when the power unit drives the pressing pieces to be close to each other, the pressing pieces are away from the inner side surfaces of the thin-wall pieces. Therefore, the vertical height and the horizontal length of the inner wall pressing mechanism can be adjusted to realize the correspondence between the inner side stress point and the outer side stress point of the thin-wall piece.
Preferably, the inner wall pressing mechanism further includes a guide rod 607, a guide rod mounting plate 606, and a limiting seat 608, the guide rod 607 is parallel to the power unit, one end of the power unit and the guide rod 607 is fixed on the guide rod 607 fixing seat, the limiting seat 608 is fixed on the mounting plate 601, and the other end of the guide rod 607 is slidably connected to the limiting seat 608. By arranging the guide rod 607 and other components, the power unit can be ensured to horizontally move along the direction of the guide rod 607 in the operation process, and the deviation of the power unit in the moving process of the driving pressing clamp is avoided; meanwhile, the other end of the guide rod 607 is slidably connected with the limiting seat 608, so that the longest distance for the power unit to drive the pressing piece to horizontally move is limited, and the thin-wall piece is prevented from being damaged due to the fact that the pressing piece horizontally moves too long.
Preferably, the linkage clamping mechanism includes flexible unit, adaptor, crank axle, clamping piece and main connecting rod, the crank axle with main connecting rod is more than two, the crank axle with main connecting rod articulates each other in proper order and encloses and close and form closed polygon, flexible unit with the adaptor is connected, adaptor and one of them the crank axle is articulated, every the crank axle all with one the rotatable connection of montant, every all connect on the crank axle and be used for pressing from both sides tight thin wall spare outside surface the clamping piece, the clamping piece is located closed polygonal inboard. According to the arrangement, a thin-wall workpiece is placed in a closed polygon enclosed by the crankshaft and the main connecting rod, the telescopic unit drives the crankshaft to rotate through the adapter piece, and the clamping piece connected with the crankshaft is adaptive to the thin-wall workpiece to be clamped and is attached to and pressed on the surface of the thin-wall workpiece; because a plurality of crank shafts are connected in series through the main connecting rod, clamping and loosening of the clamping piece on each crank shaft can be realized simultaneously, and self-centering of a thin-wall workpiece can be realized.
Preferably, the linkage clamping mechanism comprises an upper linkage clamping mechanism and a lower linkage clamping mechanism, the upper linkage clamping mechanism is connected with the upper part of the vertical rod, and the lower linkage clamping mechanism is connected with the lower part of the vertical rod. By means of the clamping device, the thin-wall piece can be clamped more stably.
Preferably, in the upper interlocking and clamping mechanism, the clamping member is a roller connected to an end of the crank shaft. The surface of the roller is smooth, so that the roller can be prevented from scratching the outer side surface of the thin-wall part when clamping the thin-wall part, and the roller is in surface contact with the thin-wall part, so that the pressure applied by the roller is more uniform and more reliable than that applied by point contact, and the thin-wall part is prevented from cracking due to the concentration of local compressive stress.
Preferably, the upper linkage clamping mechanism further comprises a limiting member for limiting the position of the roller, and the limiting member is fixed on the crank shaft and located between the roller and the main connecting rod. Through setting up the locating part, can make the flexible unit drive the pivoted in-process of crank axle, the cylinder is unlikely to remove the outside of main connecting rod, has restricted the home range of cylinder.
Preferably, in the lower linkage clamping mechanism, the clamping part comprises a pull rod and a support, the pull rod is hinged to the crank shaft, the pull rod is hinged to one end of the support, a fixed end for clamping a thin-walled part is arranged at the other end of the support, and the crank shaft drives the fixed end of the support to be far away from or close to the thin-walled part through the pull rod. When the thin-wall part is welded, the diameter of the spherical tank at the bottom side is smaller than the front cone at the middle part and the middle cylinder at the upper part, so that the pull rod and the support are arranged to ensure that the clamping part is in contact clamping with the outer side surface of the spherical tank at the bottom side.
Preferably, the linkage clamping mechanism further comprises a fixed seat, the telescopic unit is fixed to the fixed seat, and the fixed seat is arranged on the side of the rack. The arrangement ensures the stability of the telescopic unit in the working process.
Preferably, the device further comprises a platform, and the frame is fixed on the top surface of the platform.
Preferably, the three-jaw chuck mechanism is fixed to a top surface of the platform.
Preferably, the upright column is fixed at the center of the mounting seat of the three-jaw chuck mechanism or the upright column is fixed on the platform corresponding to the center of the mounting seat.
Preferably, the fixing seat is fixed to a top surface of the platform.
The technical scheme of the invention has the beneficial technical effects that:
1. the flexible welding device can realize the automatic centering of thin-wall parts such as a mixing drum and the like, and reduce the positioning deviation;
2. the flexible welding device is suitable for the tank bodies with different overall dimensions, and can realize flexible welding of thin-walled parts;
3. the flexible welding device effectively controls the misalignment between the tank bodies, and smoothly realizes the automatic welding of the rear-end mixing drum 411;
4. the flexible welding device is light in structure and convenient to maintain; the spot welding method is suitable for spot welding of stirring cylinder type thin-walled parts.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic perspective view of a flexible welding device for thin-walled parts according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a thin-walled member placed in a flexible welding device of the thin-walled member according to an embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic perspective view of the thin-walled part of FIG. 2;
FIG. 5 is a perspective view of a three-jaw chuck according to another embodiment of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a perspective view of an inner wall pressing mechanism and a column according to another embodiment of the present invention;
FIG. 8 is a right side view of FIG. 7;
FIG. 9 is a schematic perspective view of an upper linkage clamping mechanism according to another embodiment of the present invention;
fig. 10 is a plan view of fig. 9 (a dashed circle illustrating the agitating drum).
Reference numerals:
1-platform 2-frame 3-three-jaw chuck mechanism
4-upper linkage clamping mechanism 5-lower linkage clamping mechanism 6-inner wall pressing mechanism
7-fixed seat 11-spherical tank 12-front cone
13-middle cylinder 201-vertical rod 202-cross beam
203-upright column 204-stop lever 301-claw
302-chuck body 303-stressing rod 304-driving rod
305-mounting 401-drive cylinder 402-adapter
403-adjusting part 404-crank shaft 405-limiting part
406-first roller 407-roller holder 408-main connecting rod
409-main hinge axis 410-rotary hinge 411-mixing drum
412-second roller 601-mounting plate 602-fixed ring
603-supporting ring 604-horizontal cylinder 605-roller
606-guide mounting plate 607-guide 608-limiting seat
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
Referring to fig. 1 to 3, the flexible assembly welding device for thin-walled parts in this embodiment includes a rack 2, a three-jaw chuck mechanism 3, a linkage clamping mechanism and an inner wall pressing mechanism 6, where the rack 2 includes a plurality of vertical bars 201 enclosing into a cylindrical shape, a cross beam 202 connecting the vertical bars 201 together, and a vertical column 203 located between the vertical bars 201, the three-jaw chuck mechanism 3 is disposed at the bottom side inside the rack 2 and used for tensioning the thin-walled parts disposed inside the rack 2, the horizontally disposed linkage clamping mechanism is connected with the vertical bars 201 and used for clamping the outer side of the thin-walled parts inside the rack 2, and the horizontally disposed inner wall pressing mechanism 6 is connected with the vertical column 203 and used for pressing the thin-walled parts disposed inside the rack 2. When the flexible welding device is used for welding production of thin-walled parts, the three-jaw chuck mechanism 3 tensions the bottom side of the thin-walled part, the linkage clamping mechanism clamps the outer side of the thin-walled part, the position of the inner wall pressing mechanism 6 on the stand column 203 can be adjusted, so that the inner wall pressing mechanism 6 is adjusted to apply pressure to the inner side position corresponding to the outer side pressing point of the thin-walled part so as to position the thin-walled part, then spot welding is carried out on two sides near the inner and outer pressing points of the thin-walled part, and the position of the inner wall pressing mechanism 6 is adjusted to be respectively matched with the other outer side pressing points after spot welding is completed, and welding work is completed.
Referring to fig. 1 and fig. 2, in the present embodiment, the frame 2 is enclosed into a cylinder, a plate-shaped cross beam 202 connects a plurality of vertical rods 201 together, a total of 4 layers of cross beams 202 are arranged, and the cross beams 202 are connected end to end. The vertical rods 201 are fixed on the cross beam 202 through bolts and nuts, the vertical rods 201 are uniformly distributed, and the upright column 203 is arranged at the center of the rack 2.
Referring to fig. 4, the thin-walled member inside the frame 2 in this embodiment is a stirring cylinder 411 composed of a spherical tank 11, a front cone 12 and a middle cylinder 13 from bottom to top. Wherein, the three-jaw chuck mechanism 3 fixes the spherical tank 11, and the 2 linkage clamping mechanisms respectively carry out self-centering clamping on the front cone 12 and the middle cylinder 13. The inner wall pressing mechanism 6 is arranged in the stirring barrel 411 and applies pressure to the inner wall of the stirring barrel 411, the position of the inner wall pressing mechanism 6 can be adjusted to ensure that pressure points received in the inner side and the outer side of the stirring barrel 411 are corresponding, and damage caused by local pressure stress in the clamping and welding processes is avoided.
Referring to fig. 5 and 6, in the present embodiment, the three-jaw chuck mechanism 3 includes a mounting base 305, a chuck body 302, at least two jaws 301, and a driving rod 304, the mounting base 305 is fixed on a bottom side inside the frame 2, the chuck body 302 is fixed on a top side of the mounting base 305, the jaws 301 are movably connected to a top side of the chuck body 302, and one end of the driving rod 304 is connected to the chuck body 302 and drives the jaws 301 to approach or move away from each other. Referring to fig. 3 and 5, the operation of the three-jaw chuck will be briefly described: before placing the spherical tank 11, the driving rod 304 drives the claws 301 to move away from each other so that the distance between each of the claws 301 is larger than the outer diameter of the spherical tank 11, then the spherical tank 11 is placed between each of the claws 301 inside the rack 2, and then the driving rod drives the claws 301 to move close to each other to clamp the spherical tank 11. Referring to fig. 6, in another modified embodiment, in order to facilitate the operation of the driving rod 304, a force applying rod 303 is further connected to the end of the driving rod 304, the force applying rod 303 and the driving rod 304 are perpendicular to each other and are disposed outside the rack 2, and the driving rod 304 can be driven to rotate by rotating the force applying rod 303, so as to control the motion of each of the jaws 301.
Referring to fig. 7 and 8, the inner wall pressing mechanism 6 in this embodiment includes a mounting plate 601, power units, and pressing members, the mounting plate 601 is vertically connected to the column 203 in an adjustable manner, the two power units are respectively mounted at two ends of the mounting plate 601, the pressing members are fixed to the ends of the power units, and the two power units drive the two pressing members to approach or separate from each other. By means of the arrangement, the vertical height of the inner wall pressing mechanism 6 can be adjusted by adjusting the position of the mounting plate 601 on the upright column 203, and the inner wall pressing mechanism 6 can press and loosen the thin-walled part by driving the pressing part to move in the horizontal direction through the power unit. When the power unit pushes the pressing pieces to be away from each other, the two pressing pieces are respectively pressed to the inner side surfaces of the thin-wall pieces, and when the power unit drives the pressing pieces to be close to each other, the pressing pieces are away from the inner side surfaces of the thin-wall pieces. Therefore, the vertical height and the horizontal length of the inner wall pressing mechanism 6 can be adjusted to realize the correspondence between the inner side stress point and the outer side stress point of the thin-wall piece. A horizontal cylinder 604 can be used as a power unit, and a roller 605 can be used as a pressing member, wherein the roller 605 is arranged on the roller 605 seat for facilitating the connection between the tail end of the piston rod of the horizontal cylinder 604 and the roller 605. Therefore, when the piston rod of the horizontal cylinder 604 drives the roller 605 to move away from the upright column 203, namely the roller 605 gradually approaches the inner side wall of the thin-wall part, the roller 605 is pressed on the inner side wall of the thin-wall part through the horizontal cylinder 604, and the thin-wall part is pressed from the inner side of the thin-wall part.
With continued reference to fig. 7, based on the above embodiment, in another modified embodiment, the inner wall pressing mechanism 6 further includes a guide rod 607, a guide rod mounting plate 606, and a limiting seat 608, the guide rod 607 is parallel to the power unit, one end of the power unit and the guide rod 607 is fixed on the guide rod 607 fixing seat 7, the limiting seat 608 is fixed on the mounting plate 601, and the other end of the guide rod 607 is slidably connected to the limiting seat 608. Through the arrangement of the guide rod 607, the guide rod mounting plate 606 and the limiting seat 6083, the power unit can be ensured to horizontally move along the direction of the guide rod 607 in the operation process, and the power unit is prevented from deviating in the moving process of the driving pressing part; meanwhile, the other end of the guide rod 607 is slidably connected with the limiting seat 608, so that the longest distance for the power unit to drive the pressing piece to horizontally move is limited, and the thin-wall piece is prevented from being damaged due to the fact that the pressing piece horizontally moves too long.
With continued reference to fig. 7 and 8, in a further modified embodiment, based on the above embodiment, the guide bar mounting plate 606 is fixed to the upright 203 by a fixing ring 602 and a retainer ring 603, wherein the fixing ring is fixed to the upright 203 on the top side of the guide bar mounting plate 606 by bolts, and the retainer ring 603 is fixed to the upright 203 on the bottom side of the guide bar mounting plate 606 by bolts. Therefore, the position of the guide rod mounting plate 606 on the upright 203 can be conveniently adjusted, and when the height of the guide rod mounting plate 606 needs to be changed and cannot be changed, the positions of the fixing ring 602 and the supporting ring 603 on the upright 203 can be adjusted.
Referring to fig. 1 and 9, the linkage clamping mechanism in the embodiment includes a telescopic unit, an adaptor 402, a crank shaft 404, a clamping member and a main connecting rod 408, the number of the crank shaft 404 and the main connecting rod 408 is two or more, the crank shaft 404 and the main connecting rod 408 are hinged to each other through a rotating hinge 410 in sequence and form a closed polygon in an enclosing manner, the telescopic unit is connected with the adaptor 402, the adaptor 402 is hinged to one crank shaft 404, each crank shaft 404 is rotatably connected with one vertical rod 201, the clamping member for clamping the outer side surface of a thin-wall member is connected to each crank shaft 404, and the clamping member is located on the inner side of the closed polygon. The crank axle 404 is provided with a through hole or a main hinge shaft, the vertical rod 201 passes through the through hole or the main hinge shaft to be connected with the vertical rod 201, and the crank axle 404 can rotate around the vertical rod. The frame plays a supporting role, and all the crank shafts 404 are connected with the frame together, so that relative stability among the crank shafts 404 is ensured; the crank shaft 404 rotates around the vertical rod by a certain angle only within the range of the telescopic member. In this embodiment, a driving cylinder 401 is used as a telescopic unit, the end of a piston rod of the driving cylinder 401 is connected to one end of an adapter 402, and when the driving cylinder 401 works, the piston rod pulls the adapter 402 to move forward or backward in the horizontal direction, so as to drive a crank shaft 404 to rotate around a vertical rod 201. In such arrangement, a thin-wall workpiece is placed in a closed polygon enclosed by the crank shaft 404 and the main connecting rod 408, and the telescopic unit drives the crank shaft 404 to rotate through the adapter 402, so that the clamping piece connected with the crank shaft 404 is adaptive to the thin-wall workpiece to be clamped and is attached to and pressed on the surface of the thin-wall workpiece; since the plurality of crank shafts 404 are connected in series by the main connecting rod 408, clamping and unclamping of the clamping members on each crank shaft 404 can be realized simultaneously, and self-centering of a thin-walled workpiece can be realized.
Referring to fig. 1 and 2, on the basis of the above embodiment, in another modified embodiment, the frame 2 further includes a stop lever 201, the stop lever is disposed between the vertical rods 201 and fixed on the cross beam 202, and the stop lever is disposed on a side of the main connecting rod 408 of the linkage clamping mechanism close to the upright 203. When the telescopic unit drives the crank shaft 404 to rotate through the adapter 402, the main connecting rod 408 hinged to the crank shaft 404 also moves in the horizontal direction, the stop rod is arranged to limit the movement distance of the main connecting rod 408 towards one side of the upright column 203, and the phenomenon that the telescopic unit is suddenly started or fails to drive the crank shaft 404 to rotate in an overlarge radian is avoided, so that the rotary distance of the main connecting rod 408 is overlarge and the outer wall of a thin-wall part is touched.
Referring to fig. 1, 2 and 9, on the basis of the above embodiment, in another modified embodiment, the linkage clamping mechanism comprises an upper linkage clamping mechanism 4 and a lower linkage clamping mechanism 5, the upper linkage clamping mechanism 4 is connected with the upper part of the vertical rod 201, and the lower linkage clamping mechanism 5 is connected with the lower part of the vertical rod 201. In this way, the front cone 12 and the middle tube 13 can be clamped by the upper interlocking clamping mechanism 4 and the lower interlocking clamping mechanism 5, respectively, for the agitating tube 411. And the clamping pieces of the upper-layer linkage clamping mechanism 4 and the lower-layer linkage clamping mechanism 5 can be finely adjusted according to the diameter difference of the front cone 12 and the middle barrel 13 so as to ensure that the clamping pieces are clamped with the outer side surfaces of the front cone 12 and the middle barrel 13.
Referring to fig. 9, in the upper interlocking gripping mechanism 4, the gripping members are rollers attached to the end of the crank shaft 404. The surface of the roller is smooth, so that the roller can be prevented from scratching the outer side surface of the thin-wall part when clamping the thin-wall part, and the roller is in surface contact with the thin-wall part, so that the pressure applied by the roller is more uniform and more reliable than that applied by point contact, and the thin-wall part is prevented from cracking due to the concentration of local compressive stress. Referring to fig. 9 and 10, the number of the crank shafts 404 and the number of the main connecting rods 408 are 6, the crank shafts 404 and the main connecting rods are sequentially and alternately hinged and enclosed to form a closed hexagon, then the workpiece is placed in the hexagon, the telescopic unit drives the crank shafts 404 to rotate through the adapter 402, so that the rollers connected with the crank shafts 404 rotate at a certain angle, and the rollers can be adaptive to the workpiece in the hexagon and are attached to and pressed on the surface of the workpiece; since the plurality of crank shafts 404 are connected in series by the main connecting rod 408, simultaneous clamping and unclamping of the workpiece surface by the rollers on each crank shaft 404 can be achieved, and self-centering of the thin-walled workpiece can be achieved. In other embodiments, the number of the crank shafts 404 and the main connecting rods 408 can be set to be 3, 4, or 5, etc. different integers, only to ensure that all the crank shafts 404 and the main connecting rods 408 enclose to form a closed polygon. As is known in the art, the greater the number of sides of the polygon enclosed by the crankshaft 404 and the main connecting rod 408, the more contact points it makes with a thin-walled workpiece, and the more uniform the clamping force applied; it has been calculated that the balance between the manufacturing cost and the usage effect is the best when the crank shaft 404 and the main connecting rod 408 are enclosed into an equilateral hexagon.
Referring to fig. 10, in addition to the above embodiment, in another modified embodiment, the upper linkage clamping mechanism 4 further includes a limiting member 405 for limiting the position of the roller, and the limiting member 405 is fixed on the crank shaft 404 and located between the roller and the main connecting rod 408. By arranging the limiting member 405, the roller is not moved to the outer side of the main connecting rod 408 in the process that the telescopic unit drives the crank shaft 404 to rotate, and the moving range of the roller is limited.
Continuing to refer to fig. 9 and 10, the rollers of the upper clamping linkage 4 are secured to the crankshaft 404 by roller brackets 407, which facilitate replacement of rollers of different diameters and lengths as needed and in the event of roller damage. In another modified embodiment, two rollers are attached to each crank axle 404, including a first roller 406 and a second roller 412. The workpiece is clamped by the two rollers together, so that the stability of clamping the workpiece is improved; and the angle between the first roller 406 and the second roller 412 on each crank axle 404 is an obtuse angle. When the thin-wall workpiece is clamped, the contact points of the two rollers and the surface of the thin-wall workpiece are far, the stability of the thin-wall workpiece can be improved, and the self-centering of the thin-wall workpiece clamping is realized. In another embodiment, the roller surfaces are perpendicular to the plane of the crankshaft 404. Therefore, the surface contact of the surface of the roller and the surface of the thin-wall workpiece in a wider range can be ensured, the condition that the surface of the thin-wall workpiece is damaged due to overlarge local stress caused by point contact is avoided, and the pressing reliability and safety are ensured.
With continued reference to fig. 9, as a modification of this embodiment, in another embodiment, the upper-layer interlocking clamping mechanism 4 further includes an adjusting member 403, the adapter member 402 is connected to the adjusting member 403, and the adjusting member 403 is hinged to one of the crankshafts 404. A rod-shaped body is used as the adjusting member 403, and both ends of the rod-shaped body are hinged with the adaptor 402 and the crank shaft 404, respectively, through bolt assemblies. Therefore, the adjusting member 403 can rotate around the rotating member 402 within a certain angle range, and simultaneously, the crank shaft 404 can be pulled to rotate within a certain angle range, so that the flexibility of the rotation angle of the crank shaft 404 is improved.
Referring to fig. 1 and fig. 2, on the basis of the above embodiment, in another modified embodiment, in the lower-layer linkage clamping mechanism 5, the clamping member includes a pull rod and a bracket, the pull rod is hinged to the crank shaft 404 through an arc rod, the pull rod is hinged to one end of the bracket, the other end of the bracket is provided with a fixed end for clamping the thin-wall part, and when the crank shaft 404 rotates around the vertical rod 201, the pull rod and the bracket are driven by the arc rod to move, so that the fixed end of the bracket is far away from or close to the outer side surface of the thin-wall part. The bracket is arranged to reduce the distance between the fixed end and the outer side surface of the thin-wall part to be welded. Referring to fig. 2 and 4, as the diameter of the bottom spherical tank is smaller than the diameter of the middle front cone and the middle cylinder at the upper part when the thin-wall part is welded, the arrangement of the pull rod and the bracket can ensure that the clamping part can be clamped in contact with the outer side surface of the bottom spherical tank, and as a plurality of crank shafts 404 are connected in series through the main connecting rod 408, the bracket on each crank shaft 404 can simultaneously press or release the outer surface of the spherical tank, and the self-centering clamping of the spherical tank can be realized. The fixed end of the clamping piece can be an arc surface or a spherical surface which is attached to the outer surface of the spherical tank.
Referring to fig. 1 and 2, in this embodiment, the linkage clamping mechanism further includes a fixing seat 7, the fixing seat 7 is disposed beside the frame 2, and the telescopic unit is fixed to the fixing seat 7. The arrangement ensures the stability of the telescopic unit in the working process.
Referring to fig. 1 and 2, on the basis of the above embodiment, in another modified embodiment, the platform 1 is further included, and the frame 2 is fixed on the top surface of the platform 1. The fixed seat 7 is fixed on the top surface of the platform 1; the three-jaw chuck mechanism 3 is fixed on the top surface of the platform 1; the upright 203 is fixed at the center of the mounting base 305 of the three-jaw chuck mechanism 3 or the upright 203 is fixed on the platform 1 corresponding to the center of the mounting base 305.
With reference to fig. 2 and 9, the flexible assembly welding device of the present embodiment can fix and spot-weld the agitating drums 411 of different sizes, which are composed of the spherical tank 11, the front cone 12 and the middle drum 13. Wherein the three-jaw chuck mechanism 3 realizes the clamping of the spherical tank 11, the upper linkage clamping mechanism 4 and the lower linkage clamping mechanism 5 realize the automatic centering and clamping of the centering barrel 13 and the front cone 12 respectively, and the misalignment amount between the spherical tank 11 and the front cone 12 and between the front cone 12 and the middle barrel 13 is controlled by the mutual pressing between the inner wall pressing mechanism 6 and the upper linkage clamping mechanism 4 and the lower linkage clamping mechanism 5 at the outer side, so that the requirement of the automatic welding of the rear stirring barrel 411 on the product dimensional tolerance is met.
The general operation of the flexible welding device for welding the mixing drum 411 in one embodiment of the present invention is briefly described as follows:
firstly, placing the spherical tank 11 on the top side of the three-jaw chuck mechanism 3 and tensioning;
then putting the front cone 12 into the spherical tank 11 and carrying out preliminary weld crater assembly;
then the lower linkage clamping mechanism 5 starts to contract inwards synchronously, and self-centering clamping and positioning are carried out on the assembly of the spherical tank 11 and the front cone 12 to the welded junction;
then putting the front cone into a middle cylinder 13 and carrying out primary weld crater assembly with the front cone 12;
then the upper linkage clamping mechanism 4 starts to contract inwards synchronously, and self-centering clamping positioning is carried out on the assembly of the front cone 12 and the middle cylinder 13 to the welded junction;
and finally, adjusting the inner wall pressing mechanism 6 to a position corresponding to the pressing point of the linkage clamping mechanism on the outer side, extending out and pressing tightly, performing spot welding on two sides of the inside and outside pressing point accessories of the mixing drum 411, adjusting the angle position of the inner wall pressing mechanism 6 after welding is completed, respectively matching with other outside pressing points, and completing spot welding on two sides near all the pressing points.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a flexible assembly welding device of thin wall spare, its characterized in that, includes frame, three-jaw chuck mechanism, linkage clamping mechanism and inner wall hold-down mechanism, the frame is including enclosing into many montants of tube-shape, with many the crossbeam that the montant linked together and be located the stand between many montants, three-jaw chuck mechanism set up in the inside bottom side of frame, be used for the tensioning to arrange in the inside thin wall spare of frame, linkage clamping mechanism with the montant is connected linkage clamping mechanism is used for following the clamp tightly the outside of the inside thin wall spare of frame, inner wall hold-down mechanism with the stand is connected, is used for from compressing tightly arranging in the inside thin wall spare of frame.
2. A flexible assembling and welding device for thin-walled parts according to claim 1, characterized in that the three-jaw chuck mechanism comprises a mounting base, a chuck body, at least two jaws and a driving rod, wherein the mounting base is fixed on the bottom side inside the frame, the chuck body is fixed on the top side of the mounting base, the jaws are movably connected on the top side of the chuck body, and one end of the driving rod is connected with the chuck body and drives the jaws to approach or move away from each other.
3. The flexible assembly welding device for thin-walled parts according to claim 2, wherein the inner wall pressing mechanism comprises a mounting plate 601, power units and pressing members, the mounting plate 601 is vertically connected to the upright column, the two power units are respectively mounted at two ends of the mounting plate 601, the pressing members are fixed to the tail ends of the power units, and the two power units drive the two pressing members to approach or separate from each other.
4. The flexible assembling and welding device for thin-walled parts according to any one of claims 1 to 3, wherein the linkage clamping mechanism comprises a telescopic unit, an adapter, a crank shaft, a clamping piece and a main connecting rod, the number of the crank shaft and the number of the main connecting rod are more than two, the crank shaft and the main connecting rod are sequentially hinged with each other to form a closed polygon, the telescopic unit is connected with the adapter, the adapter is hinged with one of the crank shafts, each crank shaft is rotatably connected with one of the vertical rods, the clamping piece used for clamping the outer side surface of the thin-walled part is connected to each crank shaft, and the clamping piece is located on the inner side of the closed polygon.
5. A flexible assembling and welding device for thin-walled parts according to claim 4, characterized in that the linkage clamping mechanism comprises an upper linkage clamping mechanism and a lower linkage clamping mechanism, the upper linkage clamping mechanism is connected with the upper part of the vertical rod, and the lower linkage clamping mechanism is connected with the lower part of the vertical rod.
6. A flexible assembling and welding device for thin-wall parts according to claim 5, characterized in that in the upper-layer linkage clamping mechanism, the clamping piece is a roller connected with the end part of the crank shaft.
7. The flexible assembling and welding device for thin-walled parts according to claim 6, wherein the upper linkage clamping mechanism further comprises a limiting member for limiting the position of the roller, and the limiting member is fixed on the crank shaft and located between the roller and the main connecting rod.
8. The flexible assembling and welding device for thin-walled parts according to claim 5, wherein in the lower-layer linkage clamping mechanism, the clamping part comprises a pull rod and a bracket, the pull rod is hinged with the crank shaft, the pull rod is hinged with one end of the bracket, and the other end of the bracket is provided with a fixed end for clamping the thin-walled part.
9. The flexible assembling and welding device for thin-walled parts according to claim 5, wherein the linkage clamping mechanism further comprises a fixed seat, the telescopic unit is fixed on the fixed seat, and the fixed seat is arranged beside the rack.
10. A flexible assembling and welding device for thin-wall parts according to claim 4, further comprising a platform, wherein the frame is fixed on the top surface of the platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911395453.8A CN110977230A (en) | 2019-12-30 | 2019-12-30 | Flexible assembly welding device for thin-walled parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395453.8A CN110977230A (en) | 2019-12-30 | 2019-12-30 | Flexible assembly welding device for thin-walled parts |
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| CN110977230A true CN110977230A (en) | 2020-04-10 |
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| CN114918603A (en) * | 2022-06-01 | 2022-08-19 | 洛阳中集凌宇汽车有限公司 | Welding positioning tool for front cone assembly of concrete mixing transport vehicle |
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