CN105562906A - Round pipe straight-seam welding fixture and deformation control method for round pipe straight-seam welding - Google Patents
Round pipe straight-seam welding fixture and deformation control method for round pipe straight-seam welding Download PDFInfo
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- CN105562906A CN105562906A CN201610094408.9A CN201610094408A CN105562906A CN 105562906 A CN105562906 A CN 105562906A CN 201610094408 A CN201610094408 A CN 201610094408A CN 105562906 A CN105562906 A CN 105562906A
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- pipe
- seam welding
- pipe straight
- reversible deformation
- welding
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Classifications
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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
-
- 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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- 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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0535—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor longitudinal pipe seam alignment clamps
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a round pipe straight-seam welding fixture, belonging to the technical field of round pipe welding. The round pipe straight-seam welding fixture comprises a rack, a fixed support and a spindle, wherein the spindle is provided with a fixed part and an extending part; the fixed part is fixedly arranged on the fixed support; the upper surface of the extending part is fixedly provided with two anti-deforming liner plates which are oppositely arranged; the anti-deforming liner plates both extend along the axis of the spindle; a clearance is formed between the two anti-deforming liner plates; the two anti-deforming liner plates and the outer surface of the spindle jointly form a bush, and the cross section of the bush is of a segment shape; and two pressing plates which are oppositely arranged and are driven by a clamping mechanism are also arranged on the rack. The invention further discloses a deformation control method for round pipe straight-seam welding adopting the above round pipe straight-seam welding fixture. By adopting the round pipe straight-seam welding fixture and the deformation control method, welding deformation can be effectively reduced; the dimension precision of a round pipe is ensured; meanwhile the production efficiency is high; and the universality is good.
Description
Technical field
The invention belongs to pipe welding technology field, be specifically related to a kind of pipe straight seam welding frock, also relate to a kind of pipe straight seam welding deformation control method.
Background technology
The mild steel pipe of diameter phi 60mm ~ φ 200mm, wall thickness≤2mm belongs to nonstandard section bar, and in actual production, sheet material is first rolled into cylinder by adopt more, then adopts CO
2gas is protected weldering welding longitudinal joint and is formed, and weld seam generally adopts overlap joint or docking form.
At present, the welding of domestic pipe vertical masonry joint many employings special plane, its welding tooling is generally one end and fixes, open at one end formula structure, and position while welding adopts the modes such as pressing plate compression to fix pipe, hold down gag mostly is " U " shape split-type structural.When welding, because pressing plate and cylinders contact area are little, and welding tooling does not have Anti-deformation device, causes cylinder postwelding joint yielding, and circular tube end face one-tenth " peach-shaped ", is out of shape even more serious when particularly welding the sheet member of 1mm ~ 2mm.How to control the difficult point that welding deformation is straight seam welding Fixture Design.
In addition, also there is the problems such as versatility is strong, part installation is inconvenient in existing welding tooling.These all directly can have influence on welding quality and the production efficiency of part.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of pipe straight seam welding frock, and during to solve pipe straight seam welding, interface is yielding, and existing welding tooling production efficiency is low and the technical problem of poor universality.
As same technical conceive, another technical problem to be solved by this invention is: provide a kind of pipe straight seam welding deformation control method.
For solving above-mentioned first technical problem, technical scheme of the present invention is: pipe straight seam welding frock, comprise frame, described frock also comprises hold-down support and mandrel, described hold-down support is located in described frame, described mandrel has fixed part and extension, described fixed part is fixedly installed on described hold-down support, the upper surface of described extension is installed with the two reversible deformation liner plates be oppositely arranged, every described reversible deformation liner plate all extends along the axis direction of described mandrel, gap is provided with between reversible deformation liner plate described in two, the upper surface of each described reversible deformation liner plate is plane, the outer surface of two described reversible deformation liner plates and described mandrel forms the lining for installing pipe jointly, the cross section of described lining lacks shape in circle, described frame is also provided with two pressing plates be oppositely arranged driven by clamp system, pressing plate described in two lays respectively at the both sides in described gap and all extends along the axis direction of described mandrel.
Improve as one, described clamp system comprises: two fixed axis, fixed axis described in two lays respectively at the both sides of described mandrel and all extends along the axis direction of described mandrel, fixed axis described in every root is installed on two supporting seats be oppositely arranged, each described supporting seat is all fixedly installed in described frame, fixed axis described in every root is hinged with at least one and compresses pawl; Two connecting rods, one end of each described connecting rod is by the hinged linear drive apparatus of same jointed shaft, and the other end is respectively by one end of the hinged corresponding described compression pawl of rotating shaft, and the other end of described compression pawl is fixedly installed on corresponding described pressing plate.
As further improvement, described linear drive apparatus is cylinder, and described jointed shaft is arranged on the piston rod of described cylinder.
Improve as one, described pressing plate is copper pressing plate, and described reversible deformation liner plate is copper reversible deformation liner plate.
Improve as one, two described reversible deformation liner plates are structure as a whole liner plate, and described gap is be arranged on the breach on described integrative-structure liner plate.
Improve as one, described mandrel and two described reversible deformation liner plates are structure as a whole.
Improve as one, described hold-down support has two, on the described hold-down support of described extension, have perpendicular positioning face, and described perpendicular positioning arranges facing to described extension and scale is carved with in described perpendicular positioning face.
Improve as one, the workbench that described frame comprises welding stand and is arranged on above described welding stand, described hold-down support is arranged on described workbench.
For solving above-mentioned second technical problem, technical scheme of the present invention is: pipe straight seam welding deformation control method, adopts above-mentioned pipe straight seam welding frock, comprises the following steps:
(1) pipe to be welded is assembled on described lining, and the vertical masonry joint of pipe to be welded is aimed at described gap;
(2) starting described clamp system drives two described pressing plates descending, by described pressing plate, pipe to be welded is pressed on described reversible deformation liner plate, the welding position of pipe to be welded is made to produce local deformation, with the upper surface good fit of described reversible deformation liner plate;
(3) weld;
(4), after welding terminates, drive two described pressing plates up by described clamp system, unclamp the pipe after welding;
(5) pipe after welding is taken off.
After have employed technique scheme, the invention has the beneficial effects as follows:
The hold-down support due to pipe straight seam welding Fixture Design, mandrel, two reversible deformation liner plates, clamp system and two pressing plates, the outer surface of two described reversible deformation liner plates and described mandrel forms the lining for installing pipe jointly, the cross section of described lining lacks shape in circle, thus in use, pipe to be welded is assembled on described lining, and the vertical masonry joint of pipe to be welded is aimed at described gap, then starting described clamp system drives two described pressing plates descending, by described pressing plate, pipe to be welded is pressed on described reversible deformation liner plate, the welding position of pipe to be welded is made to produce local deformation, with the upper surface good fit of described reversible deformation liner plate, make to compress position and become facet by existing circular arc, guarantee appearance of weld is good, when postwelding unclamps pressing plate, pipe welding position recovers circular shape, namely reversible deformation is utilized to control the shape of pipe postwelding, can effectively control pipe post welding distortion.
Again because pressing plate described in two all extends along the axis direction of described mandrel, thus pass through platen design integrally formula pressing plate, thrust is stronger, be convenient to workpiece and produce reversible deformation, also ensure that in welding process, weld seam maintains static, angle of welding gun easily regulates, and conveniently observes weld seam during welding simultaneously.
Simultaneously by changing mandrel and two reversible deformation liner plates, the welding requirements of plurality of specifications workpiece can be adapted to.
Pipe straight seam welding frock provided by the invention and pipe straight seam welding deformation control method can effectively reduce welding deformation, ensure the dimensional accuracy of pipe, and production efficiency is high simultaneously, and versatility is good.
Because described clamp system comprises: two fixed axis, fixed axis described in every root is hinged with at least one and compresses pawl; Two connecting rods, one end of each described connecting rod is by the hinged linear drive apparatus of same jointed shaft, the other end is respectively by one end of the hinged corresponding described compression pawl of rotating shaft, the other end of described compression pawl is fixedly installed on corresponding described pressing plate, when compressing pipe to be welded, promoting rotating shaft by linear drive apparatus drivening rod and rotating, thus compression pawl is rotated around fixed axis, and then band dynamic pressure plate is descending, is pressed on reversible deformation liner plate by pressing plate by pipe to be welded; After welding terminates, then make pressing plate up, the pipe after welding is unclamped, makes clamp system easy to operate.
Because described linear drive apparatus is cylinder, described jointed shaft is arranged on the piston rod of described cylinder, and adopt cylinder as power source, structure is simple, and cost is low.
Because described pressing plate is copper pressing plate, described reversible deformation liner plate is copper reversible deformation liner plate, the pressing plate adopting copper material to make and reversible deformation liner plate, and easily cleaning spatter also butt welding can be sewed with certain cooling effect.
Because two described reversible deformation liner plates are structure as a whole liner plate, or described mandrel and two described reversible deformation liner plates are structure as a whole, and can reduce the quantity of parts like this, facilitate installation.
Because described hold-down support has two, on the described hold-down support of described extension, there is perpendicular positioning face, described perpendicular positioning arranges facing to described extension and scale is carved with in described perpendicular positioning face, thus when installing pipe to be welded, the axial location of pipe can be limited by perpendicular positioning face, and make pipe to be welded aim at position while welding by scale, make pipe accurate positioning to be welded.
Because described frame comprises welding stand and workbench, described hold-down support is arranged on described workbench, and convenient operation person picks and places workpiece.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is A place close-up schematic view in Fig. 2;
Fig. 4 is the stereogram of the embodiment of the present invention;
In figure: 1, frame, 11, welding stand, 12, workbench, 2, hold-down support, 21, perpendicular positioning face, 3, mandrel, 31, fixed part, 32, extension, 4, reversible deformation liner plate, 5, gap, 6, clamp system, 61, fixed axis, 62, supporting seat, 63, compress pawl, 64, connecting rod, 65, jointed shaft, 66, linear drive apparatus, 661, cylinder, 67, rotating shaft, 7, pressing plate, 8, pipe.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Shown in common as shown in Figure 1 to Figure 4, a kind of pipe straight seam welding frock, comprise frame 1, frock also comprises hold-down support 2 and mandrel 3, hold-down support 2 is located in frame 1, mandrel 3 has fixed part 31 and extension 32, fixed part 31 is fixedly installed on hold-down support 2, in the present embodiment, mandrel 3 is horizontally disposed with, and in order to alleviate the weight of mandrel, mandrel 3 adopts hollow-core construction, the upper surface of extension 32 is installed with the two reversible deformation liner plates 4 be oppositely arranged, each reversible deformation liner plate 4 all extends along the axis direction of mandrel 3, gap 5 is provided with between two reversible deformation liner plates 4, the upper surface of each reversible deformation liner plate 4 is plane, the outer surface of two reversible deformation liner plates 4 and mandrel 3 forms the lining for installing pipe jointly, the cross section of lining lacks shape in circle, namely cylinder in the axial direction, upper surface removes a part of material, frame 1 is also provided with two pressing plates be oppositely arranged, 7, two pressing plates 7 driven by clamp system 6 lay respectively at the both sides in gap 5 and all extend along the axis direction of mandrel 3.
Above-mentioned clamp system 6 comprises: two fixed axis 61, two fixed axis 61 lay respectively at the both sides of mandrel 3 and all extend along the axis direction of mandrel 3, every root fixed axis 61 is installed on two supporting seats be oppositely arranged 62, each supporting seat 62 is all fixedly installed in frame 1, every root fixed axis 61 is hinged with at least one and compresses pawl 63, in the present embodiment, every root fixed axis 61 is hinged with two and compresses pawl 63; Two connecting rods 64, one end of each connecting rod 64 is by the hinged linear drive apparatus 66 of same jointed shaft 65, and the other end is respectively by one end of the hinged respective pinch pawl 63 of rotating shaft 67, and the other end compressing pawl 63 is fixedly installed on corresponding pressing plate 7.
Above-mentioned linear drive apparatus 66 is preferably cylinder 661, and jointed shaft 65 is arranged on the piston rod of cylinder 661.In the present embodiment, cylinder 661 is vertically arranged, and adopt cylinder 661 as power source, structure is simple, and cost is low.Certainly, linear drive apparatus 66 also can select electric cylinder, oil cylinder etc., can realize moving up and down of jointed shaft 65, and those skilled in the art can select voluntarily according to actual conditions, do not repeat them here.
For the ease of cleaning spatter, above-mentioned pressing plate 7 is preferably copper pressing plate, and reversible deformation liner plate 4 is preferably copper reversible deformation liner plate, is so not only convenient to clear up spatter, and butt welding can be sewed with certain cooling effect.Certainly, all right aluminium alloy of material, aluminium etc. of above-mentioned pressing plate 7 and reversible deformation liner plate 4, do not repeat them here.
Alternatively, in order to reduce the quantity of parts, convenient to install, two reversible deformation liner plates 4 are structure as a whole liner plate, and gap 5 is for being arranged on the breach on described integrative-structure liner plate.Or as another kind of alternative, mandrel 3 and two reversible deformation liner plates 4 are structure as a whole.
Realization accurately location on lining is being installed in order to make pipe to be welded, above-mentioned hold-down support 2 has two, on the hold-down support 2 of extension 32, there is perpendicular positioning face 21, perpendicular positioning face 21 arranges towards extension 32 and scale is carved with in perpendicular positioning face 21, the axial location of pipe can be limited like this by perpendicular positioning face 21, and make pipe to be welded aim at position while welding by scale, make pipe accurate positioning to be welded.
Conveniently operate, the workbench 12 that frame 1 comprises welding stand 11 and is arranged on above welding stand 11, above-mentioned hold-down support 2 arranges on table 12, and convenient operation person picks and places workpiece.
Its operation principle is as follows:
In use, pipe 8 to be welded is assembled on lining, and by the vertical masonry joint alignment gap 5 of pipe 8 to be welded, then starting clamp system 6 drives two pressing plates 7 descending, clamp system 6 is when action, the piston rod of cylinder 661 protrudes upward, drivening rod 64 promotes rotating shaft 67 and rotates, thus compression pawl 63 is rotated around fixed axis 61, and then band dynamic pressure plate 7 is descending, by pressing plate 7, pipe 8 to be welded is pressed on reversible deformation liner plate 4, the welding position of pipe 8 to be welded is made to produce local deformation, with the upper surface good fit of reversible deformation liner plate 4, make to compress position and become facet by existing circular arc, then by welding gun, pipe 8 is welded, guarantee appearance of weld is good, after welding terminates, make the piston rod slide downward of cylinder 661 again, drivening rod 64 promotes rotating shaft 67 and rotates, thus compression pawl 63 is rotated around fixed axis 61, and then band dynamic pressure plate 7 is up, unclamped by the pipe after welding, pipe welding position recovers circular shape, namely utilize reversible deformation to control the shape of pipe postwelding, can effectively control pipe post welding distortion.
Again because two pressing plates 7 all extend along the axis direction of mandrel 3, thus by pressing plate 7 is designed to monoblock type pressing plate, thrust is stronger, be convenient to workpiece and produce reversible deformation, also ensure that in welding process, weld seam maintains static, angle of welding gun easily regulates, and conveniently observes weld seam during welding simultaneously.
Simultaneously by changing mandrel 3 and two reversible deformation liner plates 4, the welding requirements of plurality of specifications workpiece can be adapted to.
The pipe straight seam welding frock that the embodiment of the present invention provides, can meet CO
2gas protects weldering, TIG welds (TungstenInertGasWelding; non-melt pole inert gas tungsten electrode protection weldering), MAG welds (MetalActiveGasArcWelding; consumable electrode metal active gas arc welding) etc. multiple welding procedure, versatility is stronger.Whole welding tooling novel structure, simple to operate, with the source of welding current, welding gun walking mechanism etc. supporting become special plane use, automaticity is high, plays a great role in actual production.
The embodiment of the invention also discloses a kind of pipe straight seam welding deformation control method, adopt above-mentioned pipe straight seam welding frock, comprise the following steps:
(1) pipe 8 to be welded is assembled on lining, and by the vertical masonry joint alignment gap 5 of pipe 8 to be welded;
(2) starting clamp system 6 drives two pressing plates 7 descending, is pressed on reversible deformation liner plate 4 by pipe 8 to be welded by pressing plate 7, makes the welding position of pipe 8 to be welded produce local deformation, with the upper surface good fit of reversible deformation liner plate 4;
(3) weld;
(4), after welding terminates, drive two pressing plates 7 up by clamp system 6, unclamp the pipe after welding;
(5) pipe after welding is taken off.
The pipe straight seam welding frock that the embodiment of the present invention provides and pipe straight seam welding deformation control method can effectively reduce welding deformation, ensure the dimensional accuracy of pipe, and production efficiency is high simultaneously, and versatility is good.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. pipe straight seam welding frock, comprise frame (1), it is characterized in that, described frock also comprises hold-down support (2) and mandrel (3), described hold-down support (2) is located in described frame (1), described mandrel (3) has fixed part (31) and extension (32), described fixed part (31) is fixedly installed on described hold-down support (2), the upper surface of described extension (32) is installed with the two reversible deformation liner plates (4) be oppositely arranged, every described reversible deformation liner plate (4) all extends along the axis direction of described mandrel (3), gap (5) is provided with between reversible deformation liner plate (4) described in two, the upper surface of each described reversible deformation liner plate (4) is plane, the outer surface of two described reversible deformation liner plates (4) and described mandrel (3) forms the lining for installing pipe jointly, the cross section of described lining lacks shape in circle,
Described frame (1) is also provided with two pressing plates be oppositely arranged (7) driven by clamp system (6), pressing plate described in two (7) lays respectively at the both sides in described gap (5) and all extends along the axis direction of described mandrel (3).
2. pipe straight seam welding frock according to claim 1, is characterized in that, described clamp system (6) comprising:
Two fixed axis (61), fixed axis described in two (61) lays respectively at the both sides of described mandrel (3) and all extends along the axis direction of described mandrel (3), fixed axis (61) described in every root is installed on two supporting seats be oppositely arranged (62), each described supporting seat (62) is all fixedly installed in described frame (1), fixed axis (61) described in every root is hinged with at least one and compresses pawl (63);
Two connecting rods (64), one end of each described connecting rod (64) is by same jointed shaft (65) hinged linear drive apparatus (66), the other end is respectively by one end of the hinged corresponding described compression pawl (63) of rotating shaft (67), and the other end of described compression pawl (63) is fixedly installed on corresponding described pressing plate (7).
3. pipe straight seam welding frock according to claim 2, it is characterized in that, described linear drive apparatus (66) is arranged on the piston rod of described cylinder (661) for cylinder (661), described jointed shaft (65).
4. the pipe straight seam welding frock according to claim 1 or 2 or 3, is characterized in that, described pressing plate (7) is copper pressing plate, and described reversible deformation liner plate (4) is copper reversible deformation liner plate.
5. the pipe straight seam welding frock according to claim 1 or 2 or 3, is characterized in that, two described reversible deformation liner plates (4) are structure as a whole liner plate, and described gap (5) are for being arranged on the breach on described integrative-structure liner plate.
6. the pipe straight seam welding frock according to claim 1 or 2 or 3, is characterized in that, described mandrel (3) and two described reversible deformation liner plates (4) are structure as a whole.
7. the pipe straight seam welding frock according to claim 1 or 2 or 3, it is characterized in that, described hold-down support (2) has two, on the described hold-down support (2) of described extension (32), have perpendicular positioning face (21), described perpendicular positioning face (21) arranges towards described extension (32) and scale is carved with in described perpendicular positioning face (21).
8. the pipe straight seam welding frock according to claim 1 or 2 or 3, it is characterized in that, described frame (1) comprises welding stand (11) and is arranged on the workbench (12) of described welding stand (11) top, and described hold-down support (2) is arranged on described workbench (12).
9. pipe straight seam welding deformation control method, is characterized in that, adopts as the pipe straight seam welding frock in claim 1-8 as described in any one claim, comprises the following steps:
(1) pipe to be welded is assembled on described lining, and the vertical masonry joint of pipe to be welded is aimed at described gap (5);
(2) starting described clamp system (6) drives two described pressing plates (7) descending, by described pressing plate (7), pipe to be welded is pressed on described reversible deformation liner plate (4), the welding position of pipe to be welded is made to produce local deformation, with the upper surface good fit of described reversible deformation liner plate (4);
(3) weld;
(4), after welding terminates, drive two described pressing plates (7) up by described clamp system (6), unclamp the pipe after welding;
(5) pipe after welding is taken off.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094408.9A CN105562906B (en) | 2016-02-20 | 2016-02-20 | Pipe straight seam welding frock and pipe straight seam welding deformation control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610094408.9A CN105562906B (en) | 2016-02-20 | 2016-02-20 | Pipe straight seam welding frock and pipe straight seam welding deformation control method |
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| CN105562906A true CN105562906A (en) | 2016-05-11 |
| CN105562906B CN105562906B (en) | 2018-01-30 |
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| CN107442920A (en) * | 2017-08-01 | 2017-12-08 | 中国船舶重工集团公司第七二五研究所 | A kind of thin-wall barrel high energy beam precision welding frock and welding method |
| CN107931946A (en) * | 2018-01-23 | 2018-04-20 | 蚌埠捷顺机器有限公司 | A kind of wheel rim fixture |
| CN107984158A (en) * | 2018-01-23 | 2018-05-04 | 蚌埠捷顺机器有限公司 | A kind of wheel rim welding tooling |
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| CN108544205A (en) * | 2018-06-15 | 2018-09-18 | 江苏宝地管业有限公司 | One kind being used for stainless-steel pipe auxiliary connecting device |
| CN111136394A (en) * | 2020-02-20 | 2020-05-12 | 吉林大学 | Two-way welding jig that laser welding used |
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| CN1966200A (en) * | 2006-11-16 | 2007-05-23 | 华中科技大学 | Welding jig for welding cylinder |
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