CN110497053B - Welding device for cylinder cover and connecting shaft of corn thresher and operation steps - Google Patents
Welding device for cylinder cover and connecting shaft of corn thresher and operation steps Download PDFInfo
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- CN110497053B CN110497053B CN201910812740.8A CN201910812740A CN110497053B CN 110497053 B CN110497053 B CN 110497053B CN 201910812740 A CN201910812740 A CN 201910812740A CN 110497053 B CN110497053 B CN 110497053B
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0607—Solder feeding devices
- B23K3/063—Solder feeding devices for wire feeding
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
Abstract
The invention discloses a welding device of a roller cover and a connecting shaft of a corn thresher, which comprises a welding base frame, wherein an inner rotating table and an outer rotating table are coaxially fixed on the welding base frame, four synchronous centering fixing mechanisms are uniformly arranged on the outer rotating table along the circumferential direction, each synchronous centering fixing mechanism comprises a connecting rod, one end of each connecting rod is hinged with the outer rotating table, a swing rod is in a structure that two parallel edges are connected through an inclined edge, one parallel edge of the swing rod is hinged with the other end of the connecting rod at the corner of the inclined edge, one parallel edge of the swing rod is connected with a pressing rod and is used for pressing the roller cover, a centering pin is fixed on the other parallel edge of the swing rod and is used for centering the roller cover, two welding mechanisms are uniformly fixed on the inner rotating table along the circumferential direction, a centering sleeve and a clamping cylinder are fixed on the welding base frame, the inner hole of the centering sleeve is in clearance sliding fit with the middle part, the roller cover is simultaneously centered and clamped, and the roller cover and the connecting shaft are automatically and circumferentially welded.
Description
Technical Field
The invention relates to the field of processing equipment of a corn thresher, in particular to a welding device and an operation step for a roller cover and a connecting shaft of the corn thresher.
Background
China is a big country for corn planting, corn threshing is needed after the corn is mature, the current corn threshing machine adopts a roller-type structure, for example, an elastic corn threshing roller and a corn threshing machine (CN 207321977U) in the patent name and a corn threshing roller device (CN 207054111U) in the patent name both adopt roller-type structures, corn is extruded by a bulge on a roller and the outer side of the roller to realize threshing, roller covers are arranged at both ends of the roller, connecting shafts are welded on the roller covers, the roller covers at both sides of the roller, the connecting shafts and the roller inevitably need certain coaxiality, otherwise, the roller is eccentric, the clearance between the corn and the roller in a roller shell is changed to block the clearance of the roller, the roller can not continuously rotate to damage a motor, and when the coaxiality between the roller covers at both sides and the connecting shafts does not meet the requirement, the additional bending stress of the supporting shafts at both sides is, large noise and low efficiency.
According to the technical scheme, an electric turntable is adopted to drive four synchronous centering fixing mechanisms, synchronous centering clamping of the roller cover is achieved, a connecting rod hinged to the electric turntable is adopted by the synchronous centering mechanism to drive a swing rod to rotate, the swing rod swings to drive a centering pin to move towards the roller cover, meanwhile, the swing rod drives an L-shaped pressing rod through an elastic connecting rod, a hook head on the pressing rod is firstly attached to the upper surface of the roller cover, and the elastic connecting rod is pressed to increase pressure and shorten until the centering pin of the synchronous centering mechanism centers the roller cover; the synchronization of the pressing and the centering roller cover is realized through an elastic connecting rod mechanism; the connecting shaft is centered by adopting a centering sleeve, and the upper end of the connecting shaft is pressed onto the roller cover by adopting a clamping cylinder, so that the centering and clamping of the connecting shaft are realized; in the welding process, the lower part of the connecting shaft is still positioned in the centering sleeve to restrain the connecting shaft, so that the coaxial welding of the centering shaft and the roller cover is realized.
Disclosure of Invention
The invention aims to: discloses a welding device and an operation step of a cylinder cover and a connecting shaft, wherein the cylinder cover of the cylinder of a corn thresher rotates to realize the automatic centering of the cylinder cover and the outer cylindrical surface of the connecting shaft and the synchronous pressing of the upper side and the lower side, the connecting shaft adopts clearance fit to center the connecting shaft and is pressed by an air cylinder.
The invention aims to realize that the welding device of the roller cover and the connecting shaft of the corn thresher comprises a welding base frame 1, a clamping cylinder 2, a synchronous centering fixing mechanism 3, a centering sleeve 4, a welding mechanism 5, a supporting beam 6, an outer rotary table 7 and an inner rotary table 8, and is characterized in that: the upper end of the welding base frame 1 is coaxially fixed with the fixed sides of an outer rotary table 7 and an inner rotary table 8, and four synchronous centering fixing mechanisms 3 are uniformly distributed on the outer rotary table 7 along the circumferential direction;
the synchronous centering fixing mechanism 3 comprises a first pin 301, a centering pin 303, a swing rod 304, a pressing rod 306 and an elastic connecting rod 311, wherein the first pin 301 is fixed on the rotating side of the outer rotating table 7, the first pin 301 is rotatably connected with one end of the connecting rod 302, the swing rod 304 is in a structure that two parallel edges are connected through an inclined edge, one parallel edge of the swing rod 304 and the corner of the inclined edge are hinged with the other end of the connecting rod 302 through a fifth pin 310, one parallel edge of the swing rod 304 is in sliding connection with a sliding block 315, the other parallel edge of the swing rod 304 and the corner of the inclined edge are rotatably provided with a second pin 305, the second pin 305 is fixed on the edge of the lower side of the upper end of the welding base frame 1, the end part of the other parallel edge of the swing rod 304 is fixed with the centering pin 303, the sliding block 315 is fixed with the seventh pin 314, the seventh pin 314 is rotatably connected with a connecting block 313, the, the pressing rod 306 is in an L shape, one end of the L shape of the pressing rod 306 is hinged with the outer side end of the elastic connecting rod 311 through a four pin 309, the pressing rod 306 is in an L shape corner and is hinged with a pressing rod bracket 307 through a three pin 308, the pressing rod bracket 307 is fixed at the upper end of the welding base frame 1, the other end of the L shape of the pressing rod 306 is provided with a hook 3061 which extends inwards and is used for clamping the upper surface of the edge of the roller cover A1, and the length of the elastic connecting rod 311 is shortened along with the increase of pressure at two ends;
two welding mechanisms 5 are uniformly fixed on the rotating side of the inner rotary table 8 along the circumferential direction and used for welding the joint of the upper end of a connecting shaft A2 and a roller cover A1;
the welding bed frame 1 is fixedly provided with a supporting beam 6, the supporting beam 6 is fixedly provided with a clamping cylinder 2 and a centering sleeve 4, an inner hole of the centering sleeve 4 is in clearance sliding fit with the middle part to the lower part of a connecting shaft A2, the clamping cylinder 2, the centering sleeve 4 and a roller cover A1 are coaxially arranged, a piston rod of the clamping cylinder 2 upwards penetrates through the supporting beam 6, and the upper end of the piston rod is positioned in an inner hole at the lower end of the centering sleeve 4.
The elastic connecting rod 311 includes a first telescopic rod 3111, a first sliding pin 3112, a spring 3113, a second sliding pin 3114, a second telescopic rod 3115 and a connecting shell 3116, the connecting shell 3116 is in a circular hollow structure, two end portions of an inner hole of the connecting shell 3116 are respectively connected with one end of the first telescopic rod 3111 and one end of the second telescopic rod 3115 in a sliding manner, the first sliding pin 3112 and the second sliding pin 3114 which are arranged along the radial direction of the connecting shell 3116 are respectively fixed at one end of the first telescopic rod 3111 and one end of the second telescopic rod 3115, the connecting shell 3116 is provided with a sliding groove 3117 along the axial direction, the first sliding pin 3112 and the second sliding pin 3114 slide in the sliding groove 3117, the diameters of the other end of the first telescopic rod 3111 and the other end of the second telescopic rod 3115 become smaller, and respectively towards the direction of keeping away from connecting shell 3116 and pass out from connecting shell 3116 tip round hole, the other end of telescopic link one 3111 is articulated with connecting block 313 through pin six 312, the other end of telescopic link two 3115 is articulated with the L shape one side of compressing tightly pole 306 through pin four 309.
The welding mechanism 5 comprises a welding cylinder frame 501, a welding gun cylinder 502, a welding gun fixing frame 503 and a welding gun 504, the upper end of the welding cylinder frame 501 is fixed on the rotating side of the inner rotary table 8, the welding gun cylinder 502 is fixed at the lower end of the welding cylinder frame 501, the welding gun cylinder 502 is a double-rod cylinder, the welding gun fixing frame 503 is fixed at the end parts of two piston rods of the welding gun cylinder 502, the welding gun 504 is fixed by the welding gun fixing frame 503, the included angle between two piston rods of the welding gun cylinder 502 and a roller cover A1 is 60-80 degrees, the end part of the welding gun 504 faces the joint of the upper end of a connecting shaft A2 and the roller cover A1, and a welding wire used for welding the welding gun welds the joint of the upper end.
An upward convex supporting block 101 is arranged at a position where the upper surface of the welding base frame 1 is matched with the hook 3061, and the supporting block 101 is used for supporting the roller cover A1.
The first pin 301, the centering pin 303, the second pin 305, the fifth pin 310 and the seventh pin 314 are arranged along the vertical direction, and the third pin 308, the fourth pin 309 and the sixth pin 312 are arranged along the horizontal direction.
The included angles between the two parallel edges and the inclined edge of the swing rod 304 are obtuse angles.
The inner rotary table 8 and the outer rotary table 7 are both electric rotary tables.
The upper end of the welding base frame 1 is provided with a notch which penetrates through the upper end and the lower end of the centering pin 303, and the notch is used for avoiding the centering pin 303 when the centering pin 303 centers and clamps the outer cylindrical surface of the roller cover A1.
The operation step of the welding device for the cylinder cover and the connecting shaft of the corn thresher comprises the following steps:
when the welding device is used for the first time, a preparation stage needs to be entered, otherwise, the welding step is directly entered:
a preparation stage:
the method comprises the following steps: controlling the outer turntable 7 to rotate in the forward direction, swinging the connecting rod 302 to drive the swinging rod 304 to rotate around the second pin 305, enabling the centering pin 303 to be far away from the roller cover A1, driving the sliding block 315 to swing and slide by one parallel edge of the swinging rod 304, pulling the elastic connecting rod 311 by the connecting block 313, enabling the pressing rod 306 to swing around the third pin 308, and enabling the hook 3061 to turn outwards;
step two: controlling the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 to retract; controlling the piston rod of the clamping cylinder 2 to retract;
a welding step:
the method comprises the following steps: inserting the connecting shaft A2 into the centering sleeve 4, and attaching the lower end of the connecting shaft A2 to the upper end of a piston rod of the clamping cylinder 2;
step two: placing a roller cover A1 on four supporting blocks 101 uniformly distributed along the circumferential direction of the welding base frame 1;
step three: controlling the outer turntable 7 to rotate reversely, wherein the connecting rod 302 swings reversely to drive the swing rod 304 to rotate around the second pin 305, the centering pin 303 moves towards the roller cover A1, meanwhile, one parallel edge of the swing rod 304 drives the sliding block 315 to swing and slide, the connecting block 313 compresses the elastic connecting rod 311, the pressing rod 306 swings around the third pin 308, the hook 3061 turns inwards and is attached to the upper surface of the roller cover A1, the outer turntable 7 continues to rotate reversely, the two ends of the elastic connecting rod 311 become shorter along with the increase of the pressure, the pressure of the hook 3061 pressing the upper surface of the roller cover A1 is increased until the centering pins 303 of the four synchronous centering fixing mechanisms 3 center and press the outer cylindrical surface of the roller cover A1, and the outer turntable 7 stops rotating;
step four: the piston rod of the clamping cylinder 2 is controlled to extend out, and the upper end of the connecting shaft A2 is pressed against the geometric center position of the lower surface of the roller cover A1;
step five: the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 are controlled to extend outwards, the welding wire in the welding gun 504 welds the joint of the upper end of the connecting shaft A2 and the roller cover A1, the wire feeder externally connected with the welding gun automatically feeds the welding wire, the inner rotary table 8 is controlled to rotate forwards at the same time, after the inner rotary table 8 rotates 180 degrees around the circumferential direction of the connecting shaft A2, the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 are controlled to retract, the wire feeder stops feeding the welding wire, the inner rotary table 8 is controlled to rotate backwards, and the welding gun cylinders rotate 180 degrees around the circumferential direction of the connecting shaft;
step six: controlling the piston rod of the clamping cylinder 2 to retract; controlling the outer turntable 7 to rotate in the forward direction, swinging the connecting rod 302 to drive the swinging rod 304 to rotate around the second pin 305, enabling the centering pin 303 to be far away from the roller cover A1, driving the sliding block 315 to swing and slide by one parallel edge of the swinging rod 304, pulling the elastic connecting rod 311 by the connecting block 313, enabling the pressing rod 306 to swing around the third pin 308, and enabling the hook 3061 to turn outwards;
step seven: taking down the welding part of the connecting shaft A2 and the roller cover A1 to complete the automatic welding of the connecting shaft A2 and the roller cover A1; and repeating the steps to realize the welding of the next connecting shaft and the roller cover.
Compared with the prior art, the invention has the following advantages:
according to the technical scheme, an electric turntable is adopted to drive four synchronous centering fixing mechanisms, synchronous centering clamping of the roller cover is achieved, a connecting rod hinged to the electric turntable is adopted by the synchronous centering mechanism to drive a swing rod to rotate, the swing rod swings to drive a centering pin to move towards the roller cover, meanwhile, the swing rod drives an L-shaped pressing rod through an elastic connecting rod, a hook head on the pressing rod is firstly attached to the upper surface of the roller cover, and the elastic connecting rod is pressed to increase pressure and shorten until the centering pin of the synchronous centering mechanism centers the roller cover; the synchronization of the pressing and the centering roller cover is realized through an elastic connecting rod mechanism; the connecting shaft is centered by adopting a centering sleeve, and the upper end of the connecting shaft is pressed onto the roller cover by adopting a clamping cylinder, so that the centering and clamping of the connecting shaft are realized; in the welding process, the lower part of the connecting shaft is still positioned in the centering sleeve to restrain the connecting shaft, so that the coaxial welding of the centering shaft and the roller cover is realized.
Drawings
FIG. 1 is a first general structure diagram of a welding device of a roller cover and a connecting shaft of a corn thresher.
Fig. 2 is a general structure diagram II of a welding device of a roller cover and a connecting shaft of the corn thresher.
Fig. 3 is a schematic structural view of the synchronous centering fixing mechanism and the welding mechanism.
Fig. 4 is a first structural schematic diagram of the centering and fixing mechanism.
Fig. 5 is a schematic structural view of two ends of the elastic connecting rod respectively connected with the connecting block and the pressing rod.
Fig. 6 is a structural schematic diagram of a centering and fixing mechanism.
Fig. 7 is a schematic structural view of the welding mechanism.
Fig. 8 is a first structural view of the connecting shaft mounted in the centering sleeve.
Fig. 9 is a second structural view of the connection shaft mounted in the centering sleeve.
Fig. 10 is a first schematic structural view of the elastic link.
Fig. 11 is a second schematic structural view of the elastic link.
Reference numerals: 1-welding pedestal, 2-clamping cylinder, 3-synchronous centering fixing mechanism, 4-centering sleeve, 5-welding mechanism, 6-supporting beam, 7-outer turntable, 8-inner turntable, 101-supporting block, 301-pin I, 302-connecting rod, 303-centering pin, 304-swing rod, 305-pin II, 306-pressing rod, 307-pressing rod bracket, 308-pin III, 309-pin IV, 310-pin V, 311-elastic connecting rod, 312-pin VI, 313-connecting block, 314-pin VII, 315-sliding block, 3061-hook head, 3111-telescopic rod I, 3112-sliding pin I, 3113-spring, 3114-sliding pin II, 3115-telescopic rod II, 6-connecting shell, 3117-sliding groove, 501-welding cylinder frame, 502-welding gun cylinder, 503-welding gun fixing frame, 504-welding gun, A1-roller cover and A2-connecting shaft.
Detailed Description
With reference to fig. 1 to 11, the welding device for the cylinder cover and the connecting shaft of the corn thresher includes a welding base frame 1, a clamping cylinder 2, a synchronous centering fixing mechanism 3, a centering sleeve 4, a welding mechanism 5, a supporting beam 6, an outer turntable 7, and an inner turntable 8, wherein the synchronous centering fixing mechanism 3 includes a first pin 301, a connecting rod 302, a centering pin 303, a swing rod 304, a second pin 305, a pressing rod 306, a pressing rod support 307, a third pin 308, a fourth pin 309, a fifth pin 310, an elastic connecting rod 311, a sixth pin 312, a connecting block 313, a seventh pin 314, and a sliding block 315, the welding mechanism 5 includes a welding cylinder frame 501, a welding gun cylinder 502, a welding gun fixing frame 503, and a welding gun 504, and the welding gun is defined to be an inner side in a direction toward a central axis of the cylinder cover a1, and is defined to be an outer side in the opposite direction, so as to describe.
The lower surface of the upper end of the welding base frame 1 is fixed with the fixed sides of an outer rotary table 7 and an inner rotary table 8, the outer rotary table 7 and the inner rotary table 8 are coaxially arranged, the outer rotary table 7 is positioned at the outer side of the inner rotary table 8, four synchronous centering fixing mechanisms 3 are uniformly arranged on the outer rotary table along the circumferential direction, a first pin 301 is fixed at the rotating side of the outer rotary table 7, the first pin 301 is rotatably connected with one end of a connecting rod 302, a swing rod 304 is Z-shaped, namely two parallel edges are connected through an inclined edge, the included angles between the two parallel edges and the inclined edge are obtuse angles, a parallel edge of the swing rod 304 and the corner of the inclined edge are rotatably provided with a fifth pin 310, the fifth pin 310 is rotatably connected with the other end of the connecting rod 302, one parallel edge of the swing rod 304 is slidably connected with a sliding block 315, the other parallel edge of the swing rod 304 and the corner of the inclined edge are rotatably provided with the lower end of a second pin 305, the end part of the other parallel edge of the swing rod 304 is fixed with the lower end of a centering pin 303, the centering pin 303 is used for centering the outer cylindrical surface of the roller cover A1, a pin seven 314 is fixed on the lower side of the sliding block, the pin seven 314 is rotationally connected with a connecting block 313, the connecting block 313 is rotationally connected with a pin six 312, the pin six 312 is rotationally connected with the inner side end of the elastic connecting rod 311, the outer side end of the elastic connecting rod 311 is rotationally connected with a pin four 309, the pressing rod 306 is L-shaped, the four pin 309 is rotatably installed at one end of the L-shaped pressing rod 306, the three pin 308 is rotatably installed at the corner of the L-shaped pressing rod 306, the three pin 308 is rotatably installed at the lower end of the pressing rod bracket 307, the upper end of the pressing rod bracket 307 is fixed at the lower side edge of the upper end of the welding base frame 1, the other end of the L-shaped pressing rod 306 is provided with a hook 3061 extending inwards, for clamping the upper surface edge of the drum cover a1, the length of the elastic link 311 is shortened as the pressure at both ends is increased.
An upward convex supporting block 101 is arranged at a position where the upper surface of the welding base frame 1 is matched with the hook 3061, and the supporting block 101 is used for supporting the roller cover A1.
The upper end of the welding base frame 1 is provided with a notch which penetrates through the upper end and the lower end of the centering pin 303, and the notch is used for avoiding the centering pin 303 when the centering pin 303 centers and clamps the outer cylindrical surface of the roller cover A1.
The rotating side of the inner rotary table 8 is uniformly fixed with two welding mechanisms 5 along the circumferential direction, the rotating side of the inner rotary table 8 is fixedly welded at the upper end of a cylinder frame 501, a welding gun cylinder 502 is fixed at the lower end of the welding cylinder frame 501, the welding gun cylinder 502 is a double-rod cylinder, welding gun fixing frames 503 are fixed at the end parts of two piston rods of the welding gun cylinder 502, a welding gun 504 is fixed by the welding gun fixing frames 503, the included angle between the two piston rods of the welding gun cylinder 502 and a roller cover A1 is 60-80 degrees, for example 70 degrees, the end part of the welding gun 504 faces the joint of the upper end of a connecting shaft A2 and the roller cover A1, and a welding wire for welding a welding gun is used for welding the joint of the upper end.
The middle part of welding bed frame 1 be provided with supporting beam 6, supporting beam 6 downside fixed clamping cylinder 2, centering sleeve 4 is fixed to the upside of supporting beam 6, centering sleeve 4 hole and connecting axle A2's middle part to lower part clearance sliding fit, the clearance is no longer than 0.05mm for connecting axle A2's location. The clamping cylinder 2, the centering sleeve 4 and the roller cover A1 are coaxially arranged, a piston rod of the clamping cylinder 2 upwards penetrates through the supporting beam 6, the upper end of the piston rod is located in an inner hole at the lower end of the centering sleeve 4, and the inner turntable 8 and the outer turntable 7 are both electric turntables.
The elastic connecting rod 311 includes a first telescopic rod 3111, a first sliding pin 3112, a spring 3113, a second sliding pin 3114, a second telescopic rod 3115 and a connecting shell 3116, the connecting shell 3116 is in a circular hollow structure, two end portions of an inner hole of the connecting shell 3116 are respectively connected with one end of the first telescopic rod 3111 and one end of the second telescopic rod 3115 in a sliding manner, the first sliding pin 3112 and the second sliding pin 3114 which are arranged along the radial direction of the connecting shell 3116 are respectively fixed at one end of the first telescopic rod 3111 and one end of the second telescopic rod 3115, the connecting shell 3116 is provided with a sliding groove 3117 along the axial direction, the first sliding pin 3112 and the second sliding pin 3114 slide in the sliding groove 3117, the diameters of the other end of the first telescopic rod 3111 and the other end of the second telescopic rod 3115 become smaller, and the direction of keeping away from connecting shell 3116 is worn out from connecting shell 3116 tip round hole, and the other end of telescopic link one 3111 is connected with pin six 312 end rotation, and the other end of telescopic link two 3115 is connected with pin four 309 rotation.
The first pin 301, the centering pin 303, the second pin 305, the fifth pin 310 and the seventh pin 314 are arranged along the vertical direction, and the third pin 308, the fourth pin 309 and the sixth pin 312 are arranged along the horizontal direction.
When the connecting shaft A2 and the roller cover A1 are welded, when the welding machine is used for the first time, a preparation stage needs to be started, the outer rotating table 7 is controlled to rotate in the forward direction, the connecting rod 302 swings to drive the swing rod 304 to rotate around the second pin 305, the centering pin 303 is far away from the roller cover A1, meanwhile, one parallel edge of the swing rod 304 drives the sliding block 315 to swing and slide, the connecting block 313 pulls the elastic connecting rod 311, the pressing rod 306 swings around the third pin 308, the hook 3061 overturns outwards to control the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 to retract; the piston rod of the clamping cylinder 2 is controlled to retract. After the preparation stage is finished, the welding stage is carried out, the connecting shaft A2 is inserted into the centering sleeve 4, and the lower end of the connecting shaft A2 is attached to the upper end of the piston rod of the clamping cylinder 2; placing a roller cover A1 on four supporting blocks 101 uniformly distributed along the circumferential direction of the welding base frame 1; controlling the outer turntable 7 to rotate reversely, wherein the connecting rod 302 swings reversely to drive the swing rod 304 to rotate around the second pin 305, the centering pin 303 moves towards the roller cover A1, meanwhile, one parallel edge of the swing rod 304 drives the sliding block 315 to swing and slide, the connecting block 313 compresses the elastic connecting rod 311, the pressing rod 306 swings around the third pin 308, the hook 3061 turns inwards and is attached to the upper surface of the roller cover A1, the outer turntable 7 continues to rotate reversely, the two ends of the elastic connecting rod 311 become shorter along with the increase of the pressure, the pressure of the hook 3061 pressing the upper surface of the roller cover A1 is increased until the centering pins 303 of the four synchronous centering fixing mechanisms 3 center and press the outer cylindrical surface of the roller cover A1, and the outer turntable 7 stops rotating;
the piston rod of the clamping cylinder 2 is controlled to extend out, and the upper end of the connecting shaft A2 is pressed against the geometric center position of the lower surface of the roller cover A1; the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 are controlled to extend outwards, the welding wire in the welding gun 504 welds the joint of the upper end of the connecting shaft A2 and the roller cover A1, the wire feeder externally connected with the welding gun automatically feeds the welding wire, the inner rotary table 8 is controlled to rotate forwards at the same time, after the inner rotary table 8 rotates 180 degrees around the circumferential direction of the connecting shaft A2, the piston rods of the welding gun cylinders 502 of the two welding mechanisms 5 are controlled to retract, the wire feeder stops feeding the welding wire, the inner rotary table 8 is controlled to rotate backwards, and the welding gun cylinders rotate 180 degrees around the circumferential direction of the connecting shaft; controlling the piston rod of the clamping cylinder 2 to retract; and controlling the outer turntable 7 to rotate in the forward direction, swinging the connecting rod 302 to drive the swinging rod 304 to rotate around the second pin 305, enabling the centering pin 303 to be far away from the roller cover A1, driving the sliding block 315 to swing and slide by one parallel edge of the swinging rod 304, pulling the elastic connecting rod 311 by the connecting block 313, swinging the pressing rod 306 around the third pin 308, turning the hook 3061 outwards, taking down a welding part of the connecting shaft A2 and the roller cover A1, completing automatic welding of the connecting shaft A2 and the roller cover A1, and repeating the steps to realize welding of the next connecting shaft and the roller cover.
Claims (9)
1. A welding device for a cylinder cover and a supporting shaft of a corn thresher is characterized in that: including welding bed frame (1), die clamping cylinder (2), synchronous centering fixed establishment (3), centering sleeve (4), welding mechanism (5), supporting beam (6), outer revolving stage (7), interior revolving stage (8), its characterized in that: the upper end of the welding base frame (1) is coaxially fixed with the fixed sides of the outer rotary table (7) and the inner rotary table (8), and four synchronous centering fixing mechanisms (3) are uniformly distributed on the outer rotary table (7) along the circumferential direction;
the synchronous centering fixing mechanism (3) comprises a first pin (301), a centering pin (303), a swing rod (304), a pressing rod (306) and an elastic connecting rod (311), wherein the first pin (301) is fixed on the rotating side of the outer rotating table (7), the first pin (301) is rotatably connected with one end of the connecting rod (302), the swing rod (304) is in a structure that two parallel edges are connected through an inclined edge, one parallel edge of the swing rod (304) and the corner of the inclined edge are hinged with the other end of the connecting rod (302) through a fifth pin (310), one parallel edge of the swing rod (304) is slidably connected with a sliding block (315), a second pin (305) is rotatably installed at the corner of the other parallel edge of the swing rod (304) and the inclined edge, the second pin (305) is fixed at the edge of the lower side of the upper end of the welding base frame (1), the end part of the other parallel edge of the swing rod (304) is fixed with the centering pin (303), and the sliding block (315), a seventh pin (314) is rotatably connected with a connecting block (313), the connecting block (313) is hinged with the inner side end of the elastic connecting rod (311) through a sixth pin (312), the pressing rod (306) is L-shaped, one end of the L-shaped side of the pressing rod (306) is hinged with the outer side end of the elastic connecting rod (311) through a fourth pin (309), the pressing rod (306) is hinged with a pressing rod support (307) through a third pin (308) at the L-shaped corner, the pressing rod support (307) is fixed at the upper end of the welding base frame (1), a hook head (3061) extending inwards is arranged at the other end of the L-shaped side of the pressing rod (306) and used for clamping the upper surface of the edge of the roller cover (A1), and the length of the elastic connecting rod (311) is shortened along with the increase of pressures at the two;
the rotating side of the inner rotary table (8) is uniformly fixed with two welding mechanisms (5) along the circumferential direction and used for welding the joint of the upper end of the supporting shaft (A2) and the roller cover (A1);
welding bed frame (1) on fixed supporting beam (6), fixed die clamping cylinder (2), centering sleeve (4) on supporting beam (6), the middle part to the lower part clearance sliding fit of centering sleeve (4) hole and back shaft (A2), die clamping cylinder (2), centering sleeve (4), drum cover (A1) coaxial setting, after the piston rod of die clamping cylinder (2) upwards passed supporting beam (6), its upper end was located the lower extreme hole of centering sleeve (4).
2. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to claim 1, which is characterized in that: the elastic connecting rod (311) comprises a first telescopic rod (3111), a first sliding pin (3112), a spring (3113), a second sliding pin (3114), a second telescopic rod (3115) and a connecting shell (3116), wherein the connecting shell (3116) is of a circular hollow structure, two end parts of an inner hole of the connecting shell (3116) are respectively in sliding connection with one end of the first telescopic rod (3111) and one end of the second telescopic rod (3115), one end of the first telescopic rod (3111) and one end of the second telescopic rod (3115) are respectively fixed with the first sliding pin (3112) and the second sliding pin (3114) which are arranged along the radial direction of the connecting shell (3116), the connecting shell (3116) is provided with a sliding groove (3117) along the axial direction, the first sliding pin (3112) and the second sliding pin (3114) slide in the sliding groove (3117), the diameters of the other end parts of the first telescopic rod (3111) and the second telescopic rod (3115) are reduced and respectively penetrate out of the end part of the connecting shell (3116) towards the direction far away from, the other end of the first telescopic rod (3111) is hinged with the connecting block (313) through a pin six (312), and the other end of the second telescopic rod (3115) is hinged with one L-shaped side of the pressing rod (306) through a pin four (309).
3. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to claim 1, which is characterized in that: the welding mechanism (5) comprises a welding cylinder frame (501), a welding gun cylinder (502), a welding gun fixing frame (503) and a welding gun (504), the upper end of the welding cylinder frame (501) is fixed on the rotating side of the inner rotary table (8), the welding gun cylinder (502) is fixed at the lower end of the welding cylinder frame (501), the welding gun cylinder (502) is a double-rod cylinder, the welding gun fixing frame (503) is fixed at the end parts of two piston rods of the welding gun cylinder (502), the welding gun (504) is fixed by the welding gun fixing frame (503), the included angle between the two piston rods of the welding gun cylinder (502) and the roller cover (A1) is 60-80 degrees, the end part of the welding gun (504) faces the joint of the upper end of the support shaft (A2) and the roller cover (A1), and the welding wire used for welding the joint of the upper end of the support shaft (A36.
4. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to claim 3, wherein: and an upward convex supporting block (101) is arranged at the position where the upper surface of the welding base frame (1) is matched with the hook head (3061), and the supporting block (101) is used for supporting the roller cover (A1).
5. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to claim 4, wherein: the pin I (301), the centering pin (303), the pin II (305), the pin V (310) and the pin seven (314) are arranged along the vertical direction, and the pin III (308), the pin IV (309) and the pin six (312) are arranged along the horizontal direction.
6. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to any one of claims 1 to 5, wherein: the included angles between the two parallel edges and the inclined edge of the swing rod (304) are obtuse angles.
7. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to any one of claims 1 to 5, wherein: the inner rotary table (8) and the outer rotary table (7) are both electric rotary tables.
8. The welding device of the cylinder cover and the supporting shaft of the corn thresher according to any one of claims 1 to 5, wherein: and a notch which penetrates through the upper end of the welding base frame (1) up and down is formed in the position corresponding to the centering pin (303) and is used for avoiding the centering pin (303) when the centering pin (303) centers and clamps the outer cylindrical surface of the drum cover (A1).
9. The operating steps of the welding device of the cylinder cover and the supporting shaft of the corn thresher according to claim 5, characterized in that: the method comprises the following steps:
when the welding device is used for the first time, a preparation stage needs to be entered, otherwise, the welding step is directly entered:
a preparation stage:
the method comprises the following steps: controlling the outward rotating table (7) to rotate in the forward direction, enabling the connecting rod (302) to swing to drive the swing rod (304) to rotate around the second pin (305), enabling the centering pin (303) to be far away from the roller cover (A1), enabling one parallel edge of the swing rod (304) to drive the sliding block (315) to swing and slide, enabling the connecting block (313) to pull the elastic connecting rod (311), enabling the pressing rod (306) to swing around the third pin (308), and enabling the hook head (3061) to turn outwards;
step two: controlling the piston rods of the welding gun cylinders (502) of the two welding mechanisms (5) to retract; controlling the piston rod of the clamping cylinder (2) to retract;
a welding step:
the method comprises the following steps: inserting a support shaft (A2) into the centering sleeve (4), wherein the lower end of the support shaft (A2) is attached to the upper end of a piston rod of the clamping cylinder (2);
step two: placing a roller cover (A1) on four supporting blocks (101) uniformly distributed along the circumferential direction of a welding base frame (1);
step three: controlling the outer rotary table (7) to rotate reversely, wherein the connecting rod (302) swings reversely to drive the swing rod (304) to rotate around the second pin (305), the centering pin (303) moves towards the roller cover (A1), meanwhile, one parallel edge of the swing rod (304) drives the sliding block (315) to swing and slide, the connecting block (313) compresses the elastic connecting rod (311), the pressing rod (306) swings around the third pin (308), the hook head (3061) turns inwards and is attached to the upper surface of the roller cover (A1), the outer rotary table (7) continues to rotate reversely, two ends of the elastic connecting rod (311) shorten along with the increase of the pressure, the pressure of the hook head (3061) pressing the upper surface of the roller cover (A1) is increased until the centering pins (303) of the four synchronous centering fixing mechanisms (3) center and press the outer cylindrical surface of the roller cover (A1), and the outer rotary table (7) stops rotating;
step four: the piston rod of the clamping cylinder (2) is controlled to extend out, and the upper end of the supporting shaft (A2) is pressed against the geometric center position of the lower surface of the roller cover (A1);
step five: the piston rods of the welding gun cylinders (502) of the two welding mechanisms (5) are controlled to extend outwards, the welding wires in the welding guns (504) weld the joint of the upper end of the supporting shaft (A2) and the drum cover (A1), the wire feeders externally connected with the welding guns automatically feed the welding wires and simultaneously control the inner rotary table (8) to rotate forwards, after the inner rotary table (8) rotates 180 degrees around the circumferential direction of the supporting shaft (A2), the piston rods of the welding gun cylinders (502) of the two welding mechanisms (5) are controlled to retract, meanwhile, the wire feeders stop feeding the welding wires, the inner rotary table (8) is controlled to rotate backwards, and the welding guns rotate 180 degrees around the circumferential direction of the supporting shaft (A2) in a;
step six: controlling the piston rod of the clamping cylinder (2) to retract; controlling the outward rotating table (7) to rotate in the forward direction, enabling the connecting rod (302) to swing to drive the swing rod (304) to rotate around the second pin (305), enabling the centering pin (303) to be far away from the roller cover (A1), enabling one parallel edge of the swing rod (304) to drive the sliding block (315) to swing and slide, enabling the connecting block (313) to pull the elastic connecting rod (311), enabling the pressing rod (306) to swing around the third pin (308), and enabling the hook head (3061) to turn outwards;
step seven: taking down the welding part of the support shaft (A2) and the roller cover (A1) to complete the automatic welding of the support shaft (A2) and the roller cover (A1); and repeating the steps to realize the welding of the next support shaft and the drum cover.
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| CN201910812740.8A CN110497053B (en) | 2019-08-30 | 2019-08-30 | Welding device for cylinder cover and connecting shaft of corn thresher and operation steps |
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| CN114809126A (en) * | 2022-05-06 | 2022-07-29 | 四川川桥工程试验检测有限责任公司 | Slope deformation remote monitoring equipment |
| CN117182403B (en) * | 2023-11-06 | 2024-01-12 | 力创科技股份有限公司 | Welding device for side wall type box open channel flowmeter for installing transducer |
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| CN110497053A (en) | 2019-11-26 |
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