CN114603240B - Workpiece positioning device for electric arc welding - Google Patents
Workpiece positioning device for electric arc welding Download PDFInfo
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- CN114603240B CN114603240B CN202210336304.XA CN202210336304A CN114603240B CN 114603240 B CN114603240 B CN 114603240B CN 202210336304 A CN202210336304 A CN 202210336304A CN 114603240 B CN114603240 B CN 114603240B
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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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of electric arc welding, in particular to a workpiece positioning device for electric arc welding. A workpiece positioning device for electric arc welding comprises a support frame, a driving shaft, a centering and clamping mechanism, a limiting mechanism and an adjusting mechanism. The driving shaft is provided with a first spiral groove and a second spiral groove. The workpiece positioning device for electric arc welding utilizes the centering clamping mechanism to support the welding part of the workpieces, one workpiece is moved to the other workpiece by rotating the driving shaft, the moving speed of the workpieces is adjusted by switching the second centering clamping mechanism along the first spiral groove and the second spiral groove, so that the moving speed of the workpieces is reduced when the distance between the two workpieces is far, and compared with common metal cutting and welding equipment such as an automatic semi-automatic arc welding machine, a plasma arc welding machine and the like, the workpiece positioning time is saved on one hand, and the workpiece position is convenient to determine on the other hand.
Description
Technical Field
The invention relates to the technical field of electric arc welding, in particular to a workpiece positioning device for electric arc welding.
Background
Arc welding is the most widely used welding method in industrial production, wherein the metal to be welded is used as one electrode, a welding rod is used as the other electrode, an electric arc is generated when the two electrodes are close to each other, the welding rod and a workpiece are mutually melted by heat generated by arc discharge (commonly called arc combustion) and a welding seam is formed after condensation, so that a welding process of a firm joint is obtained. Common electric arc welding is manufactured by metal cutting and welding equipment such as automatic semi-automatic electric arc, plasma arc welding machine and the like.
During welding, a workpiece needs to be clamped and positioned first, and then welding treatment is carried out on the workpiece. The prior patent is as follows: a workpiece positioning device (patent application publication number: CN 111069758A) comprises a mounting seat arranged on a frame and an integral displacement mechanism arranged on the mounting seat, wherein a welding device is arranged on the integral displacement mechanism in a driving way, and a workpiece positioning seat arranged on the frame and right facing the welding device; a welding head positioning clamp for assembling and disassembling the positioning resistance welding head is arranged on the welding seat; one end of the workpiece positioning seat is provided with an end clamping seat capable of clamping a workpiece so as to realize the workpiece positioning welding device for stably positioning and welding the workpiece and the cable. However, when the positions of the workpieces are adjusted, the speed of the workpiece is stable and unchanged, and the final positions of the two workpieces cannot be finally determined according to the distance between the two workpieces, so that the welding efficiency of the workpieces is influenced.
Disclosure of Invention
The invention provides a workpiece positioning device for electric arc welding, which aims to solve the problem that the moving speed of the conventional workpiece positioning device cannot be adjusted.
The invention relates to a workpiece positioning device for electric arc welding, which adopts the following technical scheme:
a workpiece positioning device for electric arc welding comprises a support frame, a driving shaft, a centering and clamping mechanism, a limiting mechanism and an adjusting mechanism. The driving shaft is horizontally arranged in the left-right direction and can be rotatably arranged on the supporting frame 100 around the self axis; the two centering and clamping mechanisms are respectively sleeved at two ends of the driving shaft, and the welding part on the workpiece is sleeved at the outer side of the centering and clamping mechanisms and is used for being fixed with the centering and clamping mechanisms when in use; the two centering and clamping mechanisms are respectively a first centering and clamping mechanism and a second centering and clamping mechanism, and the first centering and clamping mechanism is arranged to be relatively fixed with the support frame in an initial state; the driving shaft is provided with a first spiral groove and a second spiral groove, the first spiral groove and the second spiral groove spirally extend to the left end of the driving shaft from the right end of the driving shaft in the first direction, and the pitch of the first spiral groove is larger than that of the second spiral groove.
The first limiting mechanism is used for promoting the second centering and clamping mechanism to horizontally move along the driving shaft to the side close to the first centering and clamping mechanism when the driving shaft rotates along the second direction viewed from right to left. The adjusting mechanism is used for driving the second centering and clamping mechanism to slide along the first spiral groove when horizontally moving to one side close to the first centering and clamping mechanism, and then slide along the second spiral groove until the two workpieces are separated by a preset distance. The second limiting mechanism is used for promoting the two centering and clamping mechanisms to synchronously move along with the driving shaft when the driving shaft rotates again after the two workpieces are separated from each other by a preset distance.
Furthermore, one end of the first centering and clamping mechanism, which faces the second centering and clamping mechanism, is connected with a baffle ring through a connecting piece; the inner peripheral wall of the second centering and clamping mechanism is provided with a first sliding groove, a mounting groove and a second sliding groove. The first sliding groove is arranged along the axial direction of the second centering and clamping mechanism; the mounting groove is arranged on the groove wall on one side of the first sliding groove and is communicated with the first sliding groove; the second sliding chute is arranged along the circumferential direction of the second centering and clamping mechanism; the adjusting mechanism comprises a first sliding block, an air pressure supporting rod, a limiting block, a second sliding block and an air leakage assembly; the first sliding block is positioned in the first sliding groove, and one end of the first sliding block is connected to the groove wall of the first sliding groove through a first spring; the air pressure supporting rod passes through the second centering and clamping mechanism and is fixedly connected to the other end of the first sliding block and extends to one side close to the first centering and clamping mechanism, and at least one intersection of the first spiral groove and the second spiral groove is positioned on one side, far away from the first centering and clamping mechanism, of the first sliding block; the limiting block is connected to the bottom of the mounting groove through a second spring, and the first sliding block is located on one side, far away from the air pressure supporting rod, of the top block in an initial state; the second sliding block is arranged along the second sliding groove in a sliding mode and is inserted into the second spiral groove, the second sliding block is in friction fit with the groove wall of the second sliding groove, and after the first sliding block crosses the limiting block, the pitch of a spiral line in which the first sliding block is connected with the second sliding block is the same as that of the second spiral groove; the air leakage assembly is arranged to enable air in the air pressure supporting rod to be leaked out after the first sliding block passes over the top block.
Furthermore, the air pressure support rod comprises an air cylinder and a piston rod, the air cylinder is fixedly arranged on the first sliding block, and the piston rod is in sealing sliding fit with the air cylinder; the air leakage assembly comprises an air leakage hole, a one-way valve plate and a top block; the air release hole is arranged on the peripheral wall of the air cylinder, the one-way valve plate is arranged on the inner side of the air release hole and is used for plugging the air release hole in an initial state; the ejector block is arranged on the limiting block and used for pushing the one-way valve plate inwards after the first sliding block crosses the limiting block, so that the air release hole is opened.
Furthermore, a first inclined plane and a second inclined plane are arranged on the limiting block, the first inclined plane faces the first sliding block in the initial state, and the second inclined plane is located on the opposite side of the first inclined plane.
Further, a workpiece positioning device for arc welding further comprises two third centering and clamping mechanisms; the two third centering and clamping mechanisms are respectively arranged on two sides of the first centering and clamping mechanism and the second centering and clamping mechanism 420, wherein one third centering and clamping mechanism is connected with the first centering and clamping mechanism through a first telescopic rod, and the other third centering and clamping mechanism is connected with the second centering and clamping mechanism through a second telescopic rod; the first telescopic rod and the second telescopic rod can only be stretched and cannot be contracted.
Furthermore, the workpiece positioning device for electric arc welding further comprises two rotating disks and two supporting cylinders; the support frame includes bottom plate, two backup pads and a plurality of connecting rod. The two supporting plates are arranged on the bottom plate and are respectively positioned on two sides of the driving shaft, the axis of the rotating disc is in the horizontal direction, and each rotating disc is rotatably arranged on one supporting plate around the axis of the rotating disc. The support cylinder has two, and every support cylinder fixed mounting is in a rolling disc, and sets up with the rolling disc is coaxial, and a support cylinder can rotationally be inserted to every end of drive shaft. One end of the connecting rod is fixedly connected with the rotating disc, and the other end of the connecting rod is fixedly connected with a third centering and clamping mechanism. The first limiting mechanism comprises a first locking bolt, a first threaded hole is formed in the supporting plate, the first locking bolt is inserted into the first threaded hole and is in screw transmission with the first threaded hole, and the inner end of the first locking bolt abuts against the rotating disc and then the rotating disc is fixed with the supporting plate. The second limiting mechanism is a second locking bolt, a second threaded hole is formed in the supporting cylinder, the second locking bolt is inserted into the second threaded hole and is in screw transmission with the second threaded hole, and the inner end of the second locking bolt abuts against the driving shaft and then the driving shaft is fixed with the rotating disc.
Furthermore, a sliding rail is arranged on the bottom plate and arranged along the extending direction of the driving shaft, an external arc welding machine is arranged along the sliding rail in a sliding mode, and the welding head is aligned to the joint of the welding parts of the two workpieces.
Further, a work piece positioner for arc welding still includes the rocking handle, and a support section of thick bamboo is run through to the right-hand member of drive shaft, and the rocking handle is installed in the right-hand member of drive shaft.
Furthermore, the connecting piece is a third telescopic rod, the third telescopic rod and the connecting rod are unidirectional telescopic rods, and the unidirectional telescopic rods can only be stretched.
The beneficial effects of the invention are: the workpiece positioning device for electric arc welding supports the welding part of the workpieces by utilizing the centering clamping mechanism, moves one workpiece to the other workpiece by rotating the driving shaft, and adjusts the moving speed of the workpieces by switching the second centering clamping mechanism along the first spiral groove and the second spiral groove, so that the moving speed of the workpieces is reduced when the distance between the two workpieces is far, and the moving speed of the workpieces is reduced when the distance between the two workpieces is near, thereby saving the positioning time of the workpieces on one hand and facilitating the determination of the positions of the workpieces on the other hand.
Further, through setting up first spout, second spout, mounting groove, first slider, second slider, stopper, first spring and disappointing mechanism for first slider and second slider homoenergetic slide into the second helicla flute smoothly simultaneously in, avoid making first slider block and lead to the speed switching failure when switching speed.
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, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a workpiece positioning apparatus for arc welding according to the present invention;
FIG. 2 is a partial exploded view of an embodiment of a workpiece positioning device for electric arc welding of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view of a drive shaft of an embodiment of a workpiece positioning apparatus for electric arc welding according to the present invention;
FIG. 5 is a schematic structural view of a centering and clamping mechanism of an embodiment of a workpiece positioning device for electric arc welding of the present invention;
FIG. 6 is a schematic structural view of a second centering and clamping mechanism of an embodiment of a workpiece positioning device for electric arc welding of the present invention;
FIG. 7 is an exploded view of FIG. 6;
FIG. 8 is a schematic structural diagram of a limiting block of an embodiment of a workpiece positioning device for electric arc welding according to the present invention;
FIG. 9 is a schematic view showing the structure of a first slider and a first spring of a pneumatic support rod of an embodiment of a workpiece positioning device for electric arc welding according to the present invention;
FIG. 10 is an enlarged view of FIG. 9 at B;
FIG. 11 is a partial schematic view of the drive shaft, first positioning device and second positioning device of an embodiment of a workpiece positioning device for electric arc welding according to the present invention;
fig. 12 is an enlarged view of fig. 11 at C.
In the figure: 100. a support frame; 110. a base plate; 120. a support plate; 130. a slide rail; 140. rotating the disc; 150. a second locking bolt; 160. a first locking bolt; 170. a support cylinder; 200. an arc welding machine; 210. a welding head; 310. a drive shaft; 320. a rocking handle; 330. a first helical groove; 340. a second helical groove; 410. a first centering and clamping mechanism; 411. a connecting rod; 412. a first telescopic rod; 420. a second centering and clamping mechanism; 421. a second telescopic rod; 422. a baffle ring; 431. a third telescopic rod; 432. a second chute; 433. a first chute; 434. mounting grooves; 450. a first slider; 460. a second slider; 461. an air pressure support bar; 462. a cylinder; 463. a piston rod; 464. a first spring; 465. a one-way valve plate; 470. a limiting block; 471. a second spring; 472. a top block; 473. a first inclined plane; 474. a second inclined plane; 500. welding the part; 600. and a third centering and clamping mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1 to 12, a workpiece positioning device for arc welding according to an embodiment of the present invention includes a support frame 100, a drive shaft 310, a centering and clamping mechanism, a limiting mechanism, and an adjusting mechanism. The driving shaft 310 is horizontally disposed in the left-right direction and is rotatably mounted to the support frame 100 about its own axis. The two centering and clamping mechanisms are respectively sleeved at two ends of the driving shaft 310, and the welding part 500 on the workpiece is sleeved outside the centering and clamping mechanism and used for being fixed with the centering and clamping mechanism when in use. As shown in fig. 1, the left centering and clamping mechanism is a first centering and clamping mechanism 410, the right centering and clamping mechanism is a second centering and clamping mechanism 420, and the first centering and clamping mechanism 410 is arranged to be fixed relative to the supporting stand 100 in an initial state. The driving shaft 310 is provided with a first spiral groove 330 and a second spiral groove 340, the first spiral groove 330 and the second spiral groove 340 spirally extend from the right end of the driving shaft 310 to the left end of the driving shaft 310 in a clockwise direction, and the pitch of the first spiral groove 330 is greater than that of the second spiral groove 340.
The first limiting mechanism is used for promoting the second centering and clamping mechanism 420 to horizontally move along the driving shaft 310 to the side close to the first centering and clamping mechanism 410 when the driving shaft 310 rotates around the counterclockwise direction seen from the right to the left.
The adjusting mechanism is used for driving the second centering and clamping mechanism 420 to slide along the first spiral groove 330 and then slide along the second spiral groove 340 when horizontally moving to one side close to the first centering and clamping mechanism 410 until two workpieces are separated by a preset distance, so that the second centering and clamping mechanism 420 firstly rapidly moves and then slowly moves, on one hand, the positioning time of the workpieces is saved, and on the other hand, the workpieces are conveniently and accurately positioned.
The second limiting mechanism is used for promoting the two centering and clamping mechanisms to synchronously rotate along with the driving shaft 310 when the driving shaft 310 rotates again after the two workpieces are separated by the preset distance, and can fully weld one circle of the interface of the welding part 500 of the two workpieces under the condition that the external arc welding machine 200 does not move.
In the present embodiment, as shown in fig. 7, 11 and 12, a stopper ring 422 is connected to the right end of the first centering and clamping mechanism 410 through a connecting member, and the stopper ring 422 is disposed coaxially with the driving shaft 310. The inner peripheral wall of the second centering and clamping mechanism 420 is provided with a first sliding groove 433, a mounting groove 434 and a second sliding groove 432. The first slide groove 433 is provided along the axial direction of the second centering and clamping mechanism 420. The mounting groove 434 is disposed on a side wall of the first sliding groove 433 and is communicated with the first sliding groove 433. The second sliding groove 432 is provided along the circumferential direction of the second centering and clamping mechanism 420.
The adjusting mechanism comprises a first slider 450, a pneumatic support rod 461, a limit block 470, a second slider 460 and a release assembly. The first sliding block 450 is located in the first sliding groove 433, and a right end of the first sliding block 450 is connected to a groove wall of the first sliding groove 433 through a first spring 464. The pneumatic support rod 461 passes through the second centering and clamping mechanism 420 and is fixedly connected to the left end of the first sliding block 450, and extends to one side close to the first centering and clamping mechanism 410, when the driving shaft 310 is rotated counterclockwise, the second centering and clamping mechanism 420 moves leftwards along the first spiral groove 330 through the first sliding block 450, and the first sliding block 450 drives the pneumatic support rod 461 to move leftwards through the first spring 464. At least one intersection of the first spiral groove 330 and the second spiral groove 340 is located at the right side of the first slider 450, the stop block 470 is connected to the bottom of the mounting groove 434 by the second spring 471, and the first slider 450 is located at the left side of the top block 472 in the initial state. The second slider 460 is slidably disposed along the second sliding groove 432 and inserted into the first spiral groove 330, the second slider 460 is in friction fit with a groove wall of the second sliding groove 432, after the left end of the pneumatic support rod 461 contacts the retainer ring 422, the second slider 460 starts to move rightward along the first spiral groove 330 under the restriction of the retainer ring 422, when the first slider 450 moves rightward continuously after passing over the stopper 470, the first slider 450 moves to the intersection of the first spiral groove 330 and the second spiral groove 340, and because the second slider 460 is both disposed in the second sliding groove 432 and the second spiral groove 340, the pitch of the spiral line where the second slider 460 and the first slider 450 jointly locate at this time is the same as the pitch of the second spiral groove 340, and when the driving shaft 310 continues to rotate counterclockwise, the first slider 450 and the second slider 460 both start to slide leftward along the second spiral groove 340, and the sliding speed becomes slow. The air release assembly is arranged to release air in the air pressure support bar 461 when the first slider 450 passes right over the top block 472, and the air pressure support bar 461 can be retracted, so that the first slider 450 and the second slider 460 are both retained in the second spiral groove 340 when the driving shaft 310 continues to rotate counterclockwise, and the position of the second centering and clamping mechanism 420 can be adjusted.
In this embodiment, the pneumatic support rod 461 comprises a cylinder 462 and a piston rod 463, the cylinder 462 is fixedly installed on the left side wall of the first slider 450, the piston rod 463 is in sealing sliding fit with the cylinder 462, and the air discharging assembly comprises a air discharging hole, a check valve plate 465 and a top block 472. The air release hole is arranged on the peripheral wall of the air cylinder 462, and the one-way valve plate 465 is arranged on the inner side of the air release hole and used for plugging the air release hole in an initial state. The top block 472 is mounted to the stopper 470 for pushing the check valve plate 465 inward after the first slider 450 passes the stopper 470 rightward, so that the air release hole is opened.
In this embodiment, the stopper 470 is provided with a first inclined surface 473 and a second inclined surface 474, the first inclined surface 473 faces to the left in the initial state, the second inclined surface 474 faces to the right, the gradient of the first inclined surface 473 is smaller than that of the second inclined surface 474, the first inclined surface 473 is arranged to enable the first slider 450 to smoothly pass over the stopper 470, and the second inclined surface 474 is arranged to enable the first slider 450 and the second slider 460 to move leftward along the second spiral groove 340 without interfering with the sliding of the first slider 450.
In the present embodiment, a workpiece positioning device for arc welding further includes two third centering and clamping mechanisms 600. The two third centering and clamping mechanisms 600 are respectively arranged on two sides of the first centering and clamping mechanism 410 and the second centering and clamping mechanism 420, one of the third centering and clamping mechanisms 600 is fixedly connected with the first centering and clamping mechanism 410 through the first telescopic rod 412, and the other third centering and clamping mechanism 600 is fixedly connected with the second centering and clamping mechanism 420 through the second telescopic rod 421, so that the stability of supporting the workpiece is improved. The first telescopic rod 412 and the second telescopic rod 421 can only be stretched but not be contracted, so that the position of each centering and clamping mechanism can be conveniently adjusted according to the length of the welding part 500 on the workpiece, the application range is wide, and the first centering and clamping mechanism 410 is prevented from moving left when the second centering and clamping mechanism 420 moves left.
In the present embodiment, the supporting bracket 100 includes a base plate 110 and two supporting plates 120. Two support plates 120 are mounted to the base plate 110 at both sides of the driving shaft 310, respectively, and a workpiece positioning device for arc welding further includes a rotating disk 140, a support cylinder 170, and a plurality of connecting rods 411. The number of the rotary disks 140 is two, the axis of the rotary disks 140 is in the left-right direction, and each rotary disk 140 is rotatably mounted to one support plate 120 about its own axis. The number of the support cylinders 170 is two, each support cylinder 170 is fixedly mounted to one of the rotary disks 140 and is coaxially disposed with the rotary disk 140, and one support cylinder 170 is rotatably inserted into each end of the driving shaft 310. One end of the connecting rod 411 is fixedly connected with the rotating disc 140, and the other end is fixedly connected with a third centering and clamping mechanism 600 for connecting the third centering and clamping mechanism 600 with the rotating disc 140. The first limiting mechanism is a first locking bolt 160, a first threaded hole is formed in the support plate 120, the first locking bolt 160 is inserted into the first threaded hole and is in threaded transmission with the first threaded hole, the inner end of the first locking bolt abuts against the rotating disc 140, then the rotating disc 140 is fixed with the support plate 120, when the first limiting mechanism is used, the first locking bolts 160 on two sides are screwed to lock the support plate 120 corresponding to the rotating disc 140, when the driving shaft 310 rotates, the second centering and clamping mechanism 420 and the third centering and clamping mechanism 600 connected with the second centering and clamping mechanism 420 can only horizontally move leftwards, and the first centering and clamping mechanism 410 and the third centering and clamping mechanism 600 connected with the first centering and clamping mechanism 410 are relatively fixed with the rotating disc 140. The second limiting mechanism comprises a second locking bolt 150, a second threaded hole is formed in the peripheral wall of the supporting cylinder 170, the second locking bolt 150 is inserted into the second threaded hole and is in threaded transmission with the second threaded hole, the inner end of the second locking bolt abuts against the driving shaft 310, then the driving shaft 310 and the rotating disc 140 rotate synchronously, when the welding part 500 of the workpiece needs to be welded after the positions of the two workpieces are adjusted, the first locking bolt 160 is loosened, the first locking bolt 160 is screwed, and then all centering and clamping mechanisms on the driving shaft 310 are driven to rotate simultaneously when the driving shaft 310 rotates.
In the present embodiment, the sliding rail 130 is disposed on the bottom plate 110, the sliding rail 130 is disposed along the extending direction of the driving shaft 310, and the external arc welding machine 200 is slidably disposed along the sliding rail 130, so as to adjust the position of the arc welding machine 200, and to align the welding head 210 of the arc welding machine 200 with the joint of the welding portion 500 of the two workpieces.
In this embodiment, a workpiece positioning apparatus for arc welding further includes a rocking handle 320, a right end of the driving shaft 310 penetrates one of the support cylinders 170, the rocking handle 320 is mounted on the right end of the driving shaft 310, and the driving shaft 310 is rotated by rocking the rocking handle 320.
In this embodiment, the connecting member is a third telescopic rod 431, and the third telescopic rod 431 and the connecting rod 411 are one-way telescopic rods, which can only be stretched. Preventing the first and second centering-clamping mechanisms 410 and 420 from moving away.
In an initial state, the first locking bolt 160 is tightened to lock the rotary disk 140 to the support plate 120, and the second locking bolt 150 is loosened to allow the driving shaft 310 to rotate with respect to the rotary disk 140. When a workpiece needs to be welded, the driving shaft 310 rotates counterclockwise by rotating the rocking handle 320, the first slider 450 and the second slider 460 slide rapidly along the first spiral groove 330, and drive the second centering and clamping mechanism 420 and a third centering and clamping mechanism 600 connected with the second centering and clamping mechanism 420 to synchronously move horizontally leftward, so as to drive the workpiece on the right side to approach the workpiece on the left side.
When the second centering and clamping mechanism 420 moves leftwards to make the left end surface of the piston rod 463 abut against the right end surface of the stop ring 422, the first slider 450 starts to move rightwards along the first spiral groove 330 by the force of the cylinder 462, and when the first slider 450 slides to the intersection of the first spiral groove 330 and the second spiral groove 340, the first slider 450 slides into the second spiral groove 340. After the first slider 450 passes the limiting block 470 rightward along the first inclined surface 473 of the limiting block 470, when the driving shaft 310 continues to rotate counterclockwise, the first spring 464 is compressed and accumulated, and when the limiting block 470 is located on the left side of the first slider 450, the top block 472 lifts the one-way valve plate 465 inward under the elastic force of the second spring 471, the air release opening is opened, and the air inside the air cylinder 462 is released. As the driving shaft 310 continues to rotate counterclockwise, the first slider 450 is forced by the first spring 464 to move leftward, the first spring 464 compresses and pushes the second centering and clamping mechanism 420 rightward, and the second centering and clamping mechanism 420 drives the second slider 460 thereon to move along the second sliding slot 432 in the second spiral groove 340. At this time, the pitch of the spiral line where the first slider 450 and the second slider 460 are located together is the same as the pitch of the slow spiral groove. At this time, when the driving shaft 310 rotates counterclockwise, the second centering and clamping mechanism 420 drives the third centering and clamping mechanism 600 connected thereto to horizontally move leftward along the second spiral groove 340, and the moving speed is reduced until the welding portion 500 of the right workpiece moves to a suitable position corresponding to the welding portion 500 of the left workpiece, and the size of the welding seam at this position is suitable.
Then, the second locking bolt 150 is locked to fix the driving shaft 310 and the rotary disk 140, and the first locking bolt 160 is released to allow the rotary disk 140 and the support plate 120 to rotate relatively. And starting the arc welding machine 200, driving the driving shaft 310 to drive all the centering locking mechanisms on the driving shaft to rotate again, and further driving the two workpieces on the centering locking mechanisms to synchronously rotate along with the driving shaft 310 so as to complete welding work. After welding is completed, the centering locking mechanism is adjusted to separate the workpiece from the centering locking mechanism, the workpiece is taken down, and then the device is manually reset.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A workpiece positioning device for electric arc welding, characterized in that: comprises a support frame, a driving shaft, a centering and clamping mechanism, a limiting mechanism and an adjusting mechanism; the driving shaft is horizontally arranged in the left-right direction and can be rotatably arranged on the supporting frame around the axis of the driving shaft; the two centering and clamping mechanisms are respectively sleeved at two ends of the driving shaft, and the welding part on the workpiece is sleeved at the outer side of the centering and clamping mechanisms and is used for being fixed with the centering and clamping mechanisms when in use; the two centering and clamping mechanisms are respectively a first centering and clamping mechanism and a second centering and clamping mechanism, and the first centering and clamping mechanism is arranged to be relatively fixed with the support frame in an initial state; the driving shaft is provided with a first spiral groove and a second spiral groove, the first spiral groove and the second spiral groove spirally extend to the left end of the driving shaft from the right end of the driving shaft in the first direction, and the screw pitch of the first spiral groove is larger than that of the second spiral groove;
the first limiting mechanism is used for promoting the second centering and clamping mechanism to horizontally move along the driving shaft to one side close to the first centering and clamping mechanism when the driving shaft rotates along a second direction seen from right to left;
the adjusting mechanism is used for driving the second centering and clamping mechanism to horizontally move towards one side close to the first centering and clamping mechanism, firstly sliding along the first spiral groove and then sliding along the second spiral groove until the two workpieces are separated by a preset distance;
the second limiting mechanism is used for promoting the two centering and clamping mechanisms to synchronously rotate along with the driving shaft when the driving shaft rotates again after the two workpieces are separated by a preset distance;
one end of the first centering and clamping mechanism, which faces the second centering and clamping mechanism, is connected with a baffle ring through a connecting piece; a first sliding groove, a mounting groove and a second sliding groove are formed in the inner peripheral wall of the second centering and clamping mechanism; the first sliding groove is arranged along the axial direction of the second centering and clamping mechanism; the mounting groove is arranged on the groove wall on one side of the first sliding groove and is communicated with the first sliding groove; the second sliding chute is arranged along the circumferential direction of the second centering and clamping mechanism; the adjusting mechanism comprises a first sliding block, an air pressure supporting rod, a limiting block, a second sliding block and an air leakage assembly; the first sliding block is positioned in the first sliding groove, and one end of the first sliding block is connected to the groove wall of the first sliding groove through a first spring; the air pressure supporting rod passes through the second centering and clamping mechanism and is fixedly connected to the other end of the first sliding block and extends to one side close to the first centering and clamping mechanism, and at least one intersection of the first spiral groove and the second spiral groove is positioned on one side, far away from the first centering and clamping mechanism, of the first sliding block; the limiting block is connected to the bottom of the mounting groove through a second spring, and the first sliding block is located on one side, far away from the air pressure supporting rod, of the top block in an initial state; the second sliding block is arranged along the second sliding groove in a sliding mode and is inserted into the second spiral groove, the second sliding block is in friction fit with the groove wall of the second sliding groove, and after the first sliding block crosses the limiting block, the pitch of a spiral line in which the first sliding block is connected with the second sliding block is the same as that of the second spiral groove; the air leakage assembly is arranged to enable air in the air pressure supporting rod to be leaked out after the first sliding block passes over the top block;
the workpiece positioning device for electric arc welding further comprises two rotating discs and two supporting cylinders; the supporting frame comprises a bottom plate, two supporting plates and a plurality of connecting rods; the two supporting plates are arranged on the bottom plate and are respectively positioned at two sides of the driving shaft, the axis of the rotating disc is in the horizontal direction, and each rotating disc is rotatably arranged on one supporting plate around the axis of the rotating disc; the number of the supporting cylinders is two, each supporting cylinder is fixedly arranged on one rotating disc and is coaxial with the rotating disc, and each end of the driving shaft is rotatably inserted into one supporting cylinder; one end of the connecting rod is fixedly connected with the rotating disc, and the other end of the connecting rod is fixedly connected with a third centering and clamping mechanism; the first limiting mechanism comprises a first locking bolt, a first threaded hole is formed in the supporting plate, the first locking bolt is inserted into the first threaded hole and is in screw transmission with the first threaded hole, and the rotating disc is fixed with the supporting plate after the inner end of the first locking screw abuts against the rotating disc; the second limiting mechanism is a second locking bolt, a second threaded hole is formed in the supporting cylinder, the second locking bolt is inserted into the second threaded hole and is in screw transmission with the second threaded hole, and the inner end of the second locking bolt abuts against the driving shaft and then the driving shaft is fixed with the rotating disc.
2. A workpiece positioning device for electric arc welding according to claim 1, wherein: the air pressure support rod comprises an air cylinder and a piston rod, the air cylinder is fixedly arranged on the first sliding block, and the piston rod is in sealing sliding fit with the air cylinder; the air leakage assembly comprises an air leakage hole, a one-way valve plate and a top block; the air release hole is arranged on the peripheral wall of the air cylinder, the one-way valve plate is arranged on the inner side of the air release hole and is used for plugging the air release hole in an initial state; the ejector block is installed on the limiting block and used for pushing the one-way valve plate inwards after the first sliding block crosses the limiting block, so that the air release hole is opened.
3. A workpiece positioning device for electric arc welding according to claim 1, wherein: the limiting block is provided with a first inclined surface and a second inclined surface, the first inclined surface faces the first sliding block in the initial state, and the second inclined surface is located on the opposite side of the first inclined surface.
4. A workpiece positioning device for electric arc welding according to claim 1, wherein: the device also comprises two third centering and clamping mechanisms; the two third centering and clamping mechanisms are respectively arranged on two sides of the first centering and clamping mechanism and the second centering and clamping mechanism, one third centering and clamping mechanism is connected with the first centering and clamping mechanism through a first telescopic rod, and the other third centering and clamping mechanism is connected with the second centering and clamping mechanism through a second telescopic rod; the first telescopic rod and the second telescopic rod can only be stretched and cannot be contracted.
5. A workpiece positioning device for electric arc welding according to claim 1, wherein: the welding head is aligned to the joint of the welding parts of the two workpieces.
6. A workpiece positioning device for electric arc welding according to claim 1, wherein: the right end of the driving shaft penetrates through a supporting barrel, and the rocking handle is installed at the right end of the driving shaft.
7. A workpiece positioning device for electric arc welding according to claim 1, wherein: the connecting piece is the third telescopic link, the third telescopic link with the connecting rod is one-way telescopic link, and one-way telescopic link only can stretch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210336304.XA CN114603240B (en) | 2022-03-31 | 2022-03-31 | Workpiece positioning device for electric arc welding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210336304.XA CN114603240B (en) | 2022-03-31 | 2022-03-31 | Workpiece positioning device for electric arc welding |
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| CN114603240B true CN114603240B (en) | 2023-04-11 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191268A (en) * | 2014-08-24 | 2014-12-10 | 吉林大学 | Bidirectional self-centering fixture for workpieces |
| CN112705887A (en) * | 2019-10-25 | 2021-04-27 | 山东华伟重特机械有限公司 | Frame welding set behind loader |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100814620B1 (en) * | 2006-11-14 | 2008-03-18 | 김병억 | Position device for welding and a rotary type welding apparatus with the same |
| CN101100050A (en) * | 2007-07-25 | 2008-01-09 | 长春轨道客车股份有限公司 | Bidirectional synchronous telescopic positioning method and device |
| CN202428152U (en) * | 2012-01-06 | 2012-09-12 | 苏州易特诺科技股份有限公司 | Adjustable clamp used for welding resonator and tap line |
| CN112355538B (en) * | 2020-12-15 | 2023-04-18 | 岳西十行机械设备有限公司 | Clamping device with angle and interval adjustment functions |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191268A (en) * | 2014-08-24 | 2014-12-10 | 吉林大学 | Bidirectional self-centering fixture for workpieces |
| CN112705887A (en) * | 2019-10-25 | 2021-04-27 | 山东华伟重特机械有限公司 | Frame welding set behind loader |
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| CN114603240A (en) | 2022-06-10 |
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