CN114193065A - Open type linkage welding positioner special for middle groove - Google Patents
Open type linkage welding positioner special for middle groove Download PDFInfo
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- CN114193065A CN114193065A CN202111641207.3A CN202111641207A CN114193065A CN 114193065 A CN114193065 A CN 114193065A CN 202111641207 A CN202111641207 A CN 202111641207A CN 114193065 A CN114193065 A CN 114193065A
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- 238000003466 welding Methods 0.000 title claims abstract description 78
- 230000007306 turnover Effects 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 239000002699 waste material Substances 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
- 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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- 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
-
- 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
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0252—Steering means
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Abstract
The special open type linkage welding positioner for the middle groove comprises a rack, a front supporting seat, a rear supporting seat and a turnover device, wherein the front end of the rack is fixedly connected with the bottom of the front supporting seat, the rear end of the rack is fixedly connected with the bottom of the rear supporting seat, the turnover device is positioned above the rack, the front end of the turnover device is connected with the front supporting seat, the rear end of the turnover device is connected with the rear supporting seat, a supporting ring is arranged at the upper end of the front supporting seat, the diameter of the supporting ring is larger than the width of a bottom plate or a middle plate so as to facilitate the passing of a welding gun, the turnover device comprises a supporting table, a front turnover ring, a rear end plate and a driving mechanism, two ends of the supporting table are respectively connected with one side of the front turnover ring and one side of the rear end plate, the other side of the rear end plate is fixedly connected with a rotating shaft of the driving mechanism so as to drive the rear end plate to overturn, the front turnover ring is also sleeved with the supporting ring, the driving mechanism is fixedly connected with the rear supporting seat.
Description
Technical Field
The invention relates to the technical field of intelligent welding, in particular to an open type linkage welding positioner special for a middle groove.
Background
The shape of the middle trough is shown in fig. 1, and the middle trough comprises a bottom plate 1, a middle plate 2, a shovel board ledge 3, a baffle ledge 4 and the like. Wherein, the bottom plate and the middle plate are welded between the shovel board ledge and the baffle ledge, so that two welding seams are arranged between the bottom plate and the ledge, and two welding seams (circled positions in the figure) are arranged between the middle plate and the ledge. Because the welding seam is wider, each welding seam needs to be welded twice, namely the upper surface of the welding seam and the lower surface of the welding seam are welded, and the bottom plate and the middle plate are welded eight times. After the welding of the upper surface of the welding seam of the middle plate (i.e. the welding seam of the upper surface of the middle plate 2 with the angle shown in fig. 1) is finished, the middle plate is turned over by 180 degrees, and then the lower surface of the welding seam of the middle plate (i.e. the welding seam of the lower surface of the middle plate 2 in fig. 1) is welded. Then, the direction of the middle plate is kept unchanged, the bottom plate is placed between the shovel board ledge and the baffle ledge, the lower surface of the welding seam of the bottom plate (namely the welding seam of the lower surface of the bottom plate 1 with the angle shown in figure 1) is welded firstly, and then the bottom plate is turned over by 180 degrees, and the upper surface of the welding seam of the bottom plate (namely the welding seam of the upper surface of the bottom plate 1 with the angle shown in figure 1) is welded. Because the medium plate, the bottom plate has all welded with the ledge this moment, only the upper surface welding seam of bottom plate has not welded yet, and the position between medium plate and the bottom plate is narrow and small this moment, and both sides are blockked by shovel board ledge 3, baffle ledge 4, and this welding seam can only stretch into the position welding between medium plate and the bottom plate by the manual work, leads to the process complicated, and artifical upset is wasted time and energy, and when the welding seam is not cooled off completely, still causes the welding seam fracture easily, influences the welding strength in middle part groove.
For the convenience of welding, the Chinese patent application with the application number of '201310128461.2' and the name of 'an automatic overturning middle groove welding device' can ensure the stability and the high efficiency of overturning by arranging the automatic overturning device. But this solution is more convenient for only the middle slot of the middle plate. If the middle groove contains middle plate and bottom plate, because the space between bottom plate and the middle plate is narrower, and the separation of welding both sides ledge, welder can't get into along the direction of ledge, but because the mounting means is fixed through two tip of middle part groove, there is not the possibility that welder stretches into from two tip of middle part groove, so welder can only weld in real time in two side directions that lie in the ledge, lead to the welding to be difficult to go on welding set, need demolish the middle part groove from welding set and weld through the manual work again, waste time and energy.
Disclosure of Invention
In view of this, it is necessary to provide an open type linkage welding positioner dedicated to a middle groove, which facilitates welding.
The special open type linkage welding positioner for the middle groove comprises a rack, a front supporting seat, a rear supporting seat and a turnover device, wherein the front end of the rack is fixedly connected with the bottom of the front supporting seat, the rear end of the rack is fixedly connected with the bottom of the rear supporting seat, the turnover device is positioned above the rack, the front end of the turnover device is connected with the front supporting seat, the rear end of the turnover device is connected with the rear supporting seat, a supporting ring is arranged at the upper end of the front supporting seat, the diameter of the supporting ring is larger than the width of a bottom plate or a middle plate so as to facilitate the passing of a welding gun, the turnover device comprises a supporting table, a front turnover ring, a rear end plate and a driving mechanism, two ends of the supporting table are respectively connected with one side of the front turnover ring and one side of the rear end plate, the other side of the rear end plate is fixedly connected with a rotating shaft of the driving mechanism so as to drive the rear end plate to overturn, the front turnover ring is also sleeved with the supporting ring, the driving mechanism is fixedly connected with the rear supporting seat.
Preferably, two sides of the lower end of the support ring are respectively provided with a fixed pulley, the fixed pulleys are fixedly connected with the front support seat, and the front turning ring is in lap joint with the fixed pulleys.
Preferably, actuating mechanism includes driving motor, driving gear, driven gear, driving motor's fuselage and back supporting seat fixed connection, the one end fixed connection of driving motor's pivot and the pivot of driving gear, the other end of the pivot of driving gear is established with back supporting seat cover and is connected and can rotate on the supporting seat of back, the driving gear still is connected with the driven gear meshing, the both ends of driven gear's pivot are established with back supporting seat cover and are connected and can rotate on the supporting seat of back, driven gear still with back end plate fixed connection to drive the back end plate and rotate.
Preferably, the brace table includes two backup pads, two backup pads are located the both sides of turning device's pivot, the middle part groove is fixed on the brace table, the front end and the rear end of brace table are equipped with a plurality of connecting holes respectively, it is corresponding, be equipped with two regulating plates on preceding flip ring and the rear end plate respectively, the side of regulating plate is equipped with the boss, the support plate erects on the boss, T type groove is located the boss, the extending direction perpendicular to turning device's of T type groove axial, pass through the bolt fastening between backup pad and the regulating plate, with the middle part groove through adjusting the different width of distance adaptation between two backup pads.
Preferably, be equipped with two bosss on the regulating plate, two bosss are located same vertical plane and are parallel to each other, the boss overlap joint of backup pad and regulating plate upper end, and the both sides of backup pad set up a connecting plate perpendicularly, are equipped with the through-hole that two rows of bolts can pass on the connecting plate, and wherein one row of through-hole passes through bolt fixed connection with the T type groove on the boss of regulating plate upper end, and another row of through-hole passes through bolt fixed connection with the T type groove on the boss of regulating plate lower extreme.
Preferably, a bolt hole is further formed between the two bosses of the adjusting plate, a bolt hole is also formed in the connecting plate, and the adjusting plate is in pin connection with the connecting plate.
Preferably, be equipped with middle part groove anchor clamps in the backup pad to fix the middle part groove in the backup pad, middle part groove anchor clamps include the clamp splice, screw up the bolt, clamp splice and backup pad fixed connection, the clamp splice is equipped with the screw hole on the perpendicular to axial direction, screws up bolt and clamp splice threaded connection to fix the middle part groove through clamp splice and screw up the bolt.
Preferably, the device further comprises a controller, the controller is arranged in the front support base 30, the controller is connected with the driving motor and used for controlling the action of the driving motor, and an I/O port is reserved in the controller and used for being connected with an external host and achieving communication with the host.
Has the advantages that: before the open type linkage welding positioner special for the middle groove is used for welding operation, the middle plate and the bottom plate are firstly spot-welded on the ledge, and then the middle groove is placed on the support table for fixing. When welding seams between the middle plate and the bottom plate are welded, the welding gun can penetrate through the support ring and the front overturning ring from the front end and extend into the middle groove to perform welding operation. Compared with the turning device in the prior art, the turning device is hollow, the middle groove is fixed along the two groove walls when being fixed, two end parts of the middle groove are exposed, and the support ring and the front turning ring are arranged and are specially used for a welding gun to penetrate through and extend into a position between the middle plate and the bottom plate from the end part of the middle groove. And through the cooperation of support ring and preceding turning ring and turning device 50, welder and turning device do not take place to interfere, and is very convenient to the welding seam between welding medium plate and the bottom plate. Especially, when the manipulator is used for welding, the manipulator does not need to adjust the cutting-in angle of the welding gun due to no blocking of the turnover device, and does not need accurate displacement control for follow-up and quit, thereby reducing welding faults and improving welding quality and efficiency. However, in the prior art, the middle groove is fixed at two ends, and the welding gun can only move and weld at two sides of the ledge and cannot extend into the space between the middle plate and the bottom plate to weld. The equipment can realize 360-degree turnover of the middle groove.
Drawings
Fig. 1 is a schematic structural view of a middle tank.
FIG. 2 is a schematic structural view of the open type linkage welding positioner special for the middle groove.
Fig. 3 and 4 are partial structural schematic views of fig. 2.
Fig. 5 and 6 are sectional views of the open type linkage welding positioner special for the middle groove of the invention.
FIG. 7 is a schematic view of the front roll-over ring and the adjusting plate according to the present invention.
Fig. 8 is a schematic diagram of the welding guns extending into the middle groove, two black line segments represent two welding guns extending into the middle plate and the bottom along the end part of the middle groove to perform welding, a dotted line segment represents that the welding guns are shielded by the middle plate after extending into the middle plate, the middle plate is installed on the positioner 10, and the two welding guns simultaneously penetrate into the middle groove from the support ring 301.
In the figure: the special open type linkage welding positioner comprises a middle groove special-purpose linkage welding positioner 10, a rack 20, a front support seat 30, a support ring 301, a fixed pulley 302, a rear support seat 40, a turnover device 50, a support table 501, a support plate 5011, a connecting plate 5012, a front turnover ring 502, a rear end plate 503, a driving mechanism 504, a driving motor 5041, a driving gear 5042, a driven gear 5043, an adjusting plate 505, a boss 5051, a T-shaped groove 5052, a bolt hole 5053, a clamp 506, a clamping block 5061 and a tightening bolt 5062.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 2, an open type linkage welding positioner 10 specially used for a middle groove comprises a frame 20, a front supporting seat 30, a rear supporting seat 40, and a turnover device 50, wherein the front end of the frame 20 is fixedly connected with the bottom of the front supporting seat 30, the rear end of the frame 20 is fixedly connected with the bottom of the rear supporting seat 40, the turnover device 50 is located above the frame 20, the front end of the turnover device 50 is connected with the front supporting seat 30, the rear end of the turnover device 50 is connected with the rear supporting seat 40, the upper end of the front supporting seat 30 is provided with a supporting ring 301, the diameter of the supporting ring 301 is larger than the width of a bottom plate or a middle plate so as to be convenient for a welding gun to pass through, the turnover device 50 comprises a supporting table 501, a front turnover ring 502, a rear end plate 503 and a driving mechanism 504, two ends of the supporting table 501 are respectively connected with one side of the front turnover ring 502 and the rear end plate 503, the other side of the rear end plate 503 is fixedly connected with a rotating shaft of the driving mechanism 504, so that the driving mechanism 504 drives the rear end plate 503 to turn, the front turning ring 502 is also sleeved and connected with the support ring 301, and the driving mechanism 504 is fixedly connected with the rear support base 40.
The middle tank may be fixed to the support platform 501 in two ways. One is to provide a clamp 506 on the support table 501 to clamp the central channel by squeezing the sides of the central channel. The other is to use a through hole on the middle groove, drill a hole on the supporting plate 5011, and fix the middle groove through a bolt, a positioning pin and the like.
In use, the central groove is fixed to the support 501 and a welding gun passes through the front inversion ring 502 to weld the central groove. The lower welding seam of the bottom plate and the lower welding seam of the middle plate are welded firstly, and then the turnover device 50 is started, so that the middle groove is turned over for 180 degrees, and the upper welding seam of the bottom plate and the upper welding seam of the middle plate are welded.
In a preferred embodiment, referring to fig. 6, two fixed pulleys 302 are respectively disposed on two sides of the lower end of the supporting ring 301, the fixed pulleys 302 are fixedly connected to the front supporting seat 30, and the front turning ring 502 overlaps the fixed pulleys 302.
In another preferred embodiment, the front inversion ring 502 is connected to the support ring 301 through a bearing.
Further, please refer to fig. 5, the driving mechanism 504 includes a driving motor 5041, a driving gear 5042, a driven gear 5043, the body of the driving motor 5041 is fixedly connected with the rear supporting seat 40, the rotating shaft of the driving motor 5041 is fixedly connected with one end of the rotating shaft of the driving gear 5042, the other end of the rotating shaft of the driving gear 5042 is sleeved with the rear supporting seat 40 and is connected with the rear supporting seat 40 and can rotate on the rear supporting seat 40, the driving gear 5042 is further engaged with the driven gear 5043, two ends of the rotating shaft of the driven gear 5043 are sleeved with the rear supporting seat 40 and are connected with the rear supporting seat 40 and can rotate on the rear supporting seat 40, and the driven gear 5043 is further fixedly connected with the rear end plate 503 to drive the rear end plate 503 to rotate.
Further, the supporting platform 501 comprises two supporting plates 5011, the two supporting plates 5011 are located on two sides of a rotating shaft of the turnover device 50, a middle groove is fixed on the supporting platform 501, a plurality of connecting holes are respectively formed in the front end and the rear end of the supporting platform 501, correspondingly, referring to fig. 3 and fig. 7, two adjusting plates 505 are respectively arranged on the front turnover ring 502 and the rear end plate 503, a boss 5051 is arranged on the side surface of the adjusting plate 505, the supporting plate 5011 is erected on the boss 5051, a T-shaped groove 5052 is located in the boss 5051, the extending direction of the T-shaped groove 5052 is perpendicular to the axial direction of the turnover device 50, and the supporting plate 5011 and the adjusting plate 505 are fixed through bolts so as to adapt to middle grooves with different widths by adjusting the distance between the two supporting plates 5011.
Set up two backup pads 5011, can make things convenient for welder to weld bottom plate or the medium plate after the upset from the bottom. Simultaneously, the distance between two backup pads 5011 is adjustable, so, just can adapt to the middle part groove of different width. When the distance between the two support plates 5011 is greater than the distance between the bottom plate and the middle plate, the ledge is placed on the support plate 5011, and the welding gun can weld the bottom plate and the middle plate below the support plate 5011. For more convenient welding, a lifting platform may be provided on the ground just below the support plate 5011, and the width of the lifting platform is smaller than the widths of the bottom plate and the middle plate. So, the accessible goes up and down, puts bottom plate or well board to the suitable position department of ledge, directly welds bottom plate or well board through welder, so, can save the step of spot welding, can improve welding quality.
Furthermore, two bosses 5051 are arranged on the adjusting plate 505, the two bosses 5051 are located on the same vertical plane and are parallel to each other, the supporting plate 5011 is in lap joint with the boss 5051 at the upper end of the adjusting plate 505, two sides of the supporting plate 5011 are vertically provided with a connecting plate 5012, the connecting plate 5012 is provided with two rows of through holes through which bolts can pass, one row of through holes is fixedly connected with the T-shaped groove 5052 on the boss 5051 at the upper end of the adjusting plate 505 through bolts, and the other row of through holes is fixedly connected with the T-shaped groove 5052 on the boss 5051 at the lower end of the adjusting plate 505 through bolts. Thus, the boss 5051 will bear the weight of the support platform 501, avoiding bolt load bearing.
Further, a pin hole 5053 is formed between the two bosses 5051 of the adjusting plate 505, a pin hole 5053 is also formed in the connecting plate 5012, and the adjusting plate 505 is in pin connection with the connecting plate 5012. The adjusting plate 505 is pinned to the connecting plate 5012 to stabilize the connection between the adjusting plate 505 and the supporting plate 5011 and prevent the supporting plate 5011 from moving along the axis of the turnover device 50.
Further, please refer to fig. 4, a middle slot clamp 506 is disposed on the supporting plate 5011 to fix the middle slot on the supporting plate 5011, the middle slot clamp 506 includes a clamping block 5061 and a tightening bolt 5062, the clamping block 5061 is fixedly connected to the supporting plate 5011, the clamping block 5061 is provided with a threaded hole in a direction perpendicular to the axial direction, and the tightening bolt 5062 is threadedly connected to the clamping block 5061 to fix the middle slot through the clamping block 5061 and the tightening bolt 5062. In the overturning process, the middle groove is easy to move in the radial direction and the vertical direction under the action of centrifugal force and gravity. Through the effect that blocks of anchor clamps 506, can avoid the middle part groove to radially remove, simultaneously, through the frictional force in anchor clamps 506 and middle part groove, can avoid the middle part to remove in vertical direction to can effectively fix the middle part groove.
The equipment further comprises a controller, wherein the controller is arranged in the front support seat 30 and connected with the driving motor and used for controlling the action of the driving motor, and an I/O port is reserved in the controller and used for being connected with an external host and realizing communication with the host. The reservation of the I/O port in the controller is that the device can work independently, and when the device needs to be connected with an external host, the on-line action is realized, so that the open function of the local machine is realized.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a special open linkage positioner in middle part groove which characterized in that: comprises a frame, a front supporting seat, a rear supporting seat and a turnover device, wherein the front end of the frame is fixedly connected with the bottom of the front supporting seat, the rear end of the frame is fixedly connected with the bottom of the rear supporting seat, the turnover device is positioned above the frame, the front end of the turnover device is connected with the front supporting seat, the rear end of the turnover device is connected with the rear supporting seat, the upper end of the front supporting seat is provided with a supporting ring, the diameter of the supporting ring is larger than the width of the bottom plate or the middle plate, so that the welding gun can pass through the turnover device, the turnover device comprises a support table, a front turnover ring, a rear end plate and a driving mechanism, two ends of the supporting platform are respectively connected with one side of the front overturning ring and one side of the rear end plate, the other side of the rear end plate is fixedly connected with a rotating shaft of the driving mechanism, so that the driving mechanism drives the rear end plate to overturn, the front overturning ring is also sleeved and connected with the supporting ring, and the driving mechanism is fixedly connected with the rear supporting seat.
2. The open type linkage welding positioner special for the middle groove as claimed in claim 1, wherein: and two sides of the lower end of the support ring are respectively provided with a fixed pulley, the fixed pulleys are fixedly connected with the front support seat, and the front turning ring is in lap joint with the fixed pulleys.
3. The open type linkage welding positioner special for the middle groove as claimed in claim 1, wherein: actuating mechanism includes driving motor, driving gear, driven gear, driving motor's fuselage and back supporting seat fixed connection, the one end fixed connection of driving motor's pivot and the pivot of driving gear, the other end of the pivot of driving gear is established with back supporting seat cover and is connected and can rotate on the supporting seat of back, the driving gear still is connected with the driven gear meshing, the both ends of driven gear's pivot are established with back supporting seat cover and are connected and can rotate on the supporting seat of back, driven gear still with back end plate fixed connection to drive the back end plate and rotate.
4. The open type linkage welding positioner special for the middle groove as claimed in claim 1, wherein: the utility model discloses a turnover device, including a support table, a plurality of connecting holes, it is corresponding, be equipped with two regulating plates on preceding flip-flop and the rear end plate respectively, the side of regulating plate is equipped with the boss, the support table is established on the boss, T type groove is located the boss, the extending direction perpendicular to turning device's of T type groove axial, pass through the bolt fastening between backup pad and the regulating plate, with through adjusting the middle part groove of the different width of distance adaptation between two backup pads.
5. The open type linkage welding positioner special for the middle groove as claimed in claim 4, wherein: the adjusting plate is provided with two bosses which are positioned on the same vertical plane and are parallel to each other, the bosses at the upper ends of the supporting plate and the adjusting plate are in lap joint, two sides of the supporting plate are vertically provided with a connecting plate, the connecting plate is provided with two rows of through holes through which bolts can pass, one row of through holes is fixedly connected with a T-shaped groove on the boss at the upper end of the adjusting plate through bolts, and the other row of through holes is fixedly connected with a T-shaped groove on the boss at the lower end of the adjusting plate through bolts.
6. The open type linkage welding positioner special for the middle groove as claimed in claim 4, wherein: a bolt hole is further formed between the two bosses of the adjusting plate, a bolt hole is also formed in the connecting plate, and the adjusting plate is in pin connection with the connecting plate.
7. The open type linkage welding positioner special for the middle groove as claimed in claim 4, wherein: the middle groove clamp is arranged on the supporting plate to fix the middle groove on the supporting plate, and comprises a clamping block and a tightening bolt, the clamping block is fixedly connected with the supporting plate, a threaded hole is formed in the clamping block in the direction perpendicular to the axial direction, and the tightening bolt is in threaded connection with the clamping block to fix the middle groove through the clamping block and the tightening bolt.
8. The open type linkage welding positioner special for the middle groove as claimed in claim 1, wherein: the equipment further comprises a controller, wherein the controller is arranged in the front support seat 30 and connected with the driving motor and used for controlling the action of the driving motor, and an I/O port is reserved in the controller and used for being connected with an external host and realizing communication with the host.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111641207.3A CN114193065A (en) | 2021-12-29 | 2021-12-29 | Open type linkage welding positioner special for middle groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111641207.3A CN114193065A (en) | 2021-12-29 | 2021-12-29 | Open type linkage welding positioner special for middle groove |
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| CN114193065A true CN114193065A (en) | 2022-03-18 |
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| CN202111641207.3A Pending CN114193065A (en) | 2021-12-29 | 2021-12-29 | Open type linkage welding positioner special for middle groove |
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