CN109848537A - Aluminium alloy thick plate edge rolling shell longitudinal seam tightens localization method - Google Patents
Aluminium alloy thick plate edge rolling shell longitudinal seam tightens localization method Download PDFInfo
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- CN109848537A CN109848537A CN201811576462.2A CN201811576462A CN109848537A CN 109848537 A CN109848537 A CN 109848537A CN 201811576462 A CN201811576462 A CN 201811576462A CN 109848537 A CN109848537 A CN 109848537A
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Abstract
The invention discloses a kind of aluminium alloy thick plate edge rolling shell longitudinal seams to tighten localization method, and the longitudinal seam after solving the problems, such as aluminium alloy thick plate edge rolling is able to satisfy requirement of the vacuum electron beam welder to weld gap.In the two sides of the aluminium alloy thick plate edge rolling shell longitudinal seam of edge rolling, straight flange (1) and edge rolling shell right side straight flange (2) on the left of 100 millimeters of edge rolling shell are respectively set, left side block (4) is fixedly welded on the left of the edge rolling shell on the outer surface of straight flange (1), right side block (5) is fixedly welded on the right side of the edge rolling shell on the outer surface of straight flange (2), it wears and is connect to elongation bolt (6) between left side block (4) and right side block (5), left side U-shaped limited block (8) is fixedly welded on the left of the edge rolling shell on the inner surface of straight flange (1), right side U-shaped limited block (9) is fixedly welded on the right side of the edge rolling shell on the inner surface of straight flange (2), two limited blocks and cheese block (10) cooperation realize that the misalignment of weld seam in a thickness direction adjusts.
Description
Technical field
The present invention relates to a kind of longitudinal seams to the shell shaped by aluminium alloy thick plate edge rolling to carry out electron-bombardment welding
Positioning tool and localization method are greater than shell of 30 millimeters or more of the aluminium alloy thick plate after edge rolling shapes suitable for thickness
Longitudinal joint carries out electron-bombardment welding.
Background technique
When being welded using vacuum electron beam welder, the requirement to weld gap is very high, and the gap of weld seam is generally required to be less than
Or it is equal to 0. 25 millimeters, before welding, longitudinal seam gap constrictions to the state for meeting welding requirements, this duct butt-welding method need to be removed
Have outside strict requirements to fit-up gap, the misalignment of misalignment and weld seam in the longitudinal direction of weld seam in a thickness direction
It is required that very stringent；Tensile strength and the big high hardness aluminium sheet alloy of yield strength, especially thickness be greater than 30 millimeters and
Above aluminium alloy thick plate, after shell edge rolling, the gap of position while welding and upper and lower unfitness of butt joint are all difficult to meet vacuum electronic
Requirement of the beam welding machine to weld gap.How Design Orientation tooling, the longitudinal seam after making the aluminium alloy thick plate edge rolling of this material
It is able to satisfy requirement of the vacuum electron beam welder to weld gap, becomes scene and is badly in need of the problem to be solved.
Summary of the invention
The present invention provides a kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightening positioning tool and localization methods, solve
Longitudinal seam after aluminium alloy thick plate edge rolling is able to satisfy the technical problem of requirement of the vacuum electron beam welder to weld gap.
The present invention is to solve the above technical problem by the following technical programs:
A kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightening positioning tool, including straight flange and edge rolling shell are right on the left of edge rolling shell
Side straight flange is fixedly welded with left side block on the left of the edge rolling shell on the outer surface of straight flange, straight flange is outer on the right side of edge rolling shell
It is fixedly welded with right side block on surface, wears and is connected to bolt is elongated, to elongation spiral shell between left side block and right side block
The tail end of bolt is provided with adjustment fastening nut；Left side U-shaped limit is fixedly welded on the left of the edge rolling shell on the inner surface of straight flange
Block is fixedly welded with right side U-shaped limited block on the right side of the edge rolling shell, in the bottom of left side U-shaped limited block on the inner surface of straight flange
It is provided with left side limited block adjustment screw hole on face, right side limited block adjustment spiral shell is provided on the bottom surface of right side U-shaped limited block
Hole is provided with cheese block below straight flange and on the right side of edge rolling shell below straight flange on the left of the edge rolling shell, in the upper of cheese block
It is provided with weld seam cushion block groove in the middle part of top surface, left side U is provided on the upper top surface of the cheese block in the left side of weld seam cushion block groove
It is recessed to be provided with right side limited block resigning on the upper top surface of the cheese block on the right side of weld seam cushion block groove for shape limited block resigning groove
Slot, in left side, the slot bottom of limited block resigning groove is provided with left side limited block and adjusts bolt across hole, and on right side, U-shaped limited block is allowed
The slot bottom of position groove is provided with right side limited block and adjusts bolt across hole, and left side limited block adjusts bolt and passes through left side from bottom to top
Limited block adjust bolt pass through Kong Houyu on the left of limited block adjustment screw hole be screwed together, right side limited block adjust bolt from it is lower to
On across right side limited block adjust bolt pass through Kong Houyu on the right side of limited block adjustment screw hole be screwed together；Left side U-shaped limited block
It is arranged in the U-shaped limited block resigning groove of left side, right side U-shaped limited block is arranged in the U-shaped limited block resigning groove of right side.
The slot bottom of weld seam cushion block groove is provided with billet apical grafting tapped through hole, the spiral shell in billet apical grafting tapped through hole
It is connected to billet apical grafting bolt, billet is provided in weld seam cushion block groove, aluminium backing plate is provided on billet, in aluminium pad
Aluminium alloy thick plate edge rolling shell longitudinal seam gap is provided with above plate；In the left side cheese block of left side U-shaped limited block resigning groove
Left side U-shaped limited block apical grafting bolt thread through-hole is provided on column, left side U-shaped limited block apical grafting bolt is screwed onto left side U-shaped
In limited block apical grafting bolt thread through-hole；Right side U is provided on the right side cheese block column of right side U-shaped limited block resigning groove
Shape limited block apical grafting bolt thread through-hole, right side U-shaped limited block apical grafting bolt are screwed onto right side U-shaped limited block apical grafting bolt thread
In through-hole.
A kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightening localization method, comprising the following steps:
The first step is respectively arranged on the left of 100 millimeters of edge rolling shell in the two sides of the aluminium alloy thick plate edge rolling shell longitudinal seam of edge rolling
Straight flange on the right side of straight flange and edge rolling shell is fixedly welded left side block on the outer surface of straight flange on the left of the edge rolling shell, in edge rolling shell
Right side block is fixedly welded on the right side of body on the outer surface of straight flange, wears and is connect to elongation bolt between left side block and right side block,
To the tail end setting adjustment fastening nut for elongating bolt；Left side U is fixedly welded on the left of the edge rolling shell on the inner surface of straight flange
Shape limited block is fixedly welded right side U-shaped limited block, the U-shaped limited block in left side on the right side of the edge rolling shell on the inner surface of straight flange
It is provided with left side limited block adjustment screw hole on bottom surface, right side limited block tune is provided on the bottom surface of right side U-shaped limited block
Cheese block is arranged below straight flange and on the right side of edge rolling shell below straight flange on the left of the edge rolling shell, in cheese block in whole screw hole
Weld seam cushion block groove is set in the middle part of upper top surface, the U-shaped on the left of setting on the upper top surface of the cheese block in the left side of weld seam cushion block groove
Limited block resigning groove, the limited block resigning groove on the right side of setting on the upper top surface of the cheese block on the right side of weld seam cushion block groove,
Limited block adjusts bolt and passes through hole on the left of the slot bottom setting of left side limited block resigning groove, and on right side, U-shaped limited block is stepped down recessed
The slot bottom setting right side limited block of slot adjusts bolt and passes through hole, and left side limited block adjusts bolt and passes through left side limited block from bottom to top
It adjusts bolt to be screwed together across limited block adjustment screw hole on the left of Kong Houyu, right side limited block adjusts bolt and passes through from bottom to top
Right side limited block adjusts bolt and is screwed together across limited block adjustment screw hole on the right side of Kong Houyu；U-shaped limited block setting in left side exists
In the U-shaped limited block resigning groove of left side, right side U-shaped limited block is arranged in the U-shaped limited block resigning groove of right side；
Second step, the slot bottom setting billet apical grafting tapped through hole in weld seam cushion block groove, in billet apical grafting tapped through hole
Be spirally connected billet apical grafting bolt, and billet is arranged in weld seam cushion block groove, aluminium backing plate is arranged on billet, on aluminium backing plate
Side is provided with aluminium alloy thick plate edge rolling shell longitudinal seam gap；In the left side cheese block column of left side U-shaped limited block resigning groove
U-shaped limited block apical grafting bolt thread through-hole on the left of upper setting, left side U-shaped limited block apical grafting bolt are screwed onto left side U-shaped limited block
In apical grafting bolt thread through-hole；The U-shaped limited block on the right side of setting on the right side cheese block column of right side U-shaped limited block resigning groove
Apical grafting bolt thread through-hole, right side U-shaped limited block apical grafting bolt are screwed onto the U-shaped limited block apical grafting bolt thread through-hole of right side；
Third step adjusts fastening nut by rotation, adjusts the spacing between left side block and right side block, enables aluminum alloy to slab
Edge rolling shell longitudinal seam gap is less than or equal to 0. 25 millimeters；Bolt and right side limit are adjusted by rotating left side limited block respectively
Position block adjusts bolt, makes left side U-shaped limited block that straight flange on the left of edge rolling shell be driven to adjust up and down, drives right side U-shaped limited block
Straight flange adjusts up and down on the right side of edge rolling shell, reaches the misalignment of weld seam in a thickness direction less than or equal to 0. 25 millimeters；
4th step, rotation left side U-shaped limited block apical grafting bolt, limit the right end of left side U-shaped limited block apical grafting bolt and left side U-shaped
Position block is held out against；Rotation right side U-shaped limited block apical grafting bolt, limits the left end of right side U-shaped limited block apical grafting bolt and right side U-shaped
Block is held out against；By rotating billet apical grafting bolt, make aluminium backing plate and aluminium alloy thick plate edge rolling shell longitudinal seam gap apical grafting one
It rises；
5th step is removed to bolt is elongated, and is implemented with vacuum electron beam welder to aluminium alloy thick plate edge rolling shell longitudinal seam gap
Welding.
The gap value and unfitness of butt joint that tool locating of the invention enables the longitudinal measure of slab edge rolling shell to stitch reach vacuum
The basic demand of electron beam welding；Tooling is tightened in fit-up gap on 100 millimeters of the straight flange after edge rolling in two welding end surfaces, protects
The gap for having demonstrate,proved butt weld and unfitness of butt joint are within 0.25 millimeter, square groove, and it is right after thick aluminum alloy plate edge rolling to realize
The electron beam welding one-pass molding of longitudinal joint is connect, welding quality is high, and weld appearance is beautiful.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of cheese block 10 of the invention；
Fig. 3 is that the cooperation between left side U-shaped limited block apical grafting bolt 15 of the invention, cheese block 10 and left side U-shaped limited block 8 is closed
System's figure.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing:
A kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightening positioning tool, including straight flange 1 and edge rolling shell on the left of edge rolling shell
Right side straight flange 2 is fixedly welded with left side block 4, the straight flange on the right side of edge rolling shell on the left of the edge rolling shell on the outer surface of straight flange 1
Be fixedly welded on 2 outer surface right side block 5, worn between left side block 4 and right side block 5 be connected to elongate bolt 6,
Adjustment fastening nut 7 is provided with to the tail end for elongating bolt 6；It is fixedly welded on the inner surface of straight flange 1 on the left of the edge rolling shell
Left side U-shaped limited block 8 is fixedly welded with right side U-shaped limited block 9 on the right side of the edge rolling shell, in left side U on the inner surface of straight flange 2
It is provided with left side limited block adjustment screw hole 12 on the bottom surface of shape limited block 8, is arranged on the bottom surface of right side U-shaped limited block 9
There is right side limited block adjustment screw hole 17, is arranged on the left of the edge rolling shell below straight flange 1 and on the right side of edge rolling shell below straight flange 2
There is cheese block 10, weld seam cushion block groove 23 is provided in the middle part of the upper top surface of cheese block 10, in the left side of weld seam cushion block groove 23
Cheese block 10 upper top surface on be provided with left side U-shaped limited block resigning groove 11, the pad on the right side of weld seam cushion block groove 23
It is provided with right side limited block resigning groove 16 on the upper top surface of plate 10, is provided in the slot bottom of left side limited block resigning groove 11
Left side limited block adjusts bolt and passes through hole 26, and the slot bottom of right side U-shaped limited block resigning groove 16 is provided with right side limited block tune
Save bolt pass through hole 27, left side limited block adjust bolt 13 from bottom to top pass through left side limited block adjust bolt pass through hole 26 after with
Limited block adjustment screw hole 12 in left side is screwed together, and right side limited block adjusts bolt 18 and passes through the adjusting of right side limited block from bottom to top
Bolt is screwed together after passing through hole 27 with right side limited block adjustment screw hole 17；The setting of left side U-shaped limited block 8 is limited in left side U-shaped
In position block resigning groove 11, right side U-shaped limited block 9 is arranged in right side U-shaped limited block resigning groove 16.
The slot bottom of weld seam cushion block groove 23 is provided with billet apical grafting tapped through hole 21, in billet apical grafting tapped through hole
It is bolted with billet apical grafting bolt 22 in 21, is provided with billet 24 in weld seam cushion block groove 23, is arranged on billet 24
There is aluminium backing plate 25, aluminium alloy thick plate edge rolling shell longitudinal seam gap 3 is provided with above aluminium backing plate 25；In left side U-shaped limited block
Left side U-shaped limited block apical grafting bolt thread through-hole 14, the limit of left side U-shaped are provided on the left side cheese block column of resigning groove 11
Block apical grafting bolt 15 is screwed onto left side U-shaped limited block apical grafting bolt thread through-hole 14；In right side U-shaped limited block resigning groove 16
Right side cheese block column on be provided with right side U-shaped limited block apical grafting bolt thread through-hole 19, right side U-shaped limited block apical grafting bolt
20 are screwed onto right side U-shaped limited block apical grafting bolt thread through-hole 19；The two of the aluminium alloy thick plate edge rolling shell longitudinal seam of edge rolling
Straight flange 2 on the right side of straight flange 1 and edge rolling shell is respectively arranged on the left of 100 millimeters of edge rolling shell in side, on the left of the edge rolling shell in straight flange 1
Single 9 left sides U-shaped limited block 8 is welded on side；Single 9 right sides U is welded on the right side of the edge rolling shell on the medial surface of straight flange 2
Shape limited block 9；Single 5 left sides block 4 is welded on the left of the edge rolling shell on the lateral surface of straight flange 1, it is straight on the right side of edge rolling shell
Single 5 right sides block 5 is welded on the lateral surface on side 2.
A kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightening localization method, comprising the following steps:
The first step is respectively arranged on the left of 100 millimeters of edge rolling shell in the two sides of the aluminium alloy thick plate edge rolling shell longitudinal seam of edge rolling
Straight flange 2 on the right side of straight flange 1 and edge rolling shell is fixedly welded left side block 4 on the outer surface of straight flange 1 on the left of the edge rolling shell, is rolling up
Right side block 5 is fixedly welded on the right side of round casing on the outer surface of straight flange 2, wears and is connect to drawing between left side block 4 and right side block 5
Stay bolt 6, to the tail end setting adjustment fastening nut 7 for elongating bolt 6；It is solid on the inner surface of straight flange 1 on the left of the edge rolling shell
Fixed welding left side U-shaped limited block 8 is fixedly welded right side U-shaped limited block 9 on the inner surface of straight flange 2 on the right side of the edge rolling shell, on a left side
It is provided with left side limited block adjustment screw hole 12 on the bottom surface of side U-shaped limited block 8, is set on the bottom surface of right side U-shaped limited block 9
It is equipped with right side limited block adjustment screw hole 17, is set below straight flange 1 and on the right side of edge rolling shell below straight flange 2 on the left of the edge rolling shell
Cheese block 10 is set, weld seam cushion block groove 23 is set in the middle part of the upper top surface of cheese block 10, in the left side of weld seam cushion block groove 23
Setting left side U-shaped limited block resigning groove 11, the cheese block on the right side of weld seam cushion block groove 23 on the upper top surface of cheese block 10
Setting right side limited block resigning groove 16 on 10 upper top surface, limits on the left of the slot bottom setting of left side limited block resigning groove 11
Block adjusts bolt and passes through hole 26, and limited block adjusts bolt and passes through on the right side of the slot bottom setting of right side U-shaped limited block resigning groove 16
Hole 27, left side limited block adjust bolt 13 from bottom to top pass through left side limited block adjust bolt pass through hole 26 after with left side limited block
Adjustment screw hole 12 is screwed together, and right side limited block adjusts bolt 18 and passes through right side limited block adjusting bolt from bottom to top across hole
It is screwed together after 27 with right side limited block adjustment screw hole 17；The setting of left side U-shaped limited block 8 is stepped down recessed in left side U-shaped limited block
In slot 11, right side U-shaped limited block 9 is arranged in right side U-shaped limited block resigning groove 16；
Second step, the slot bottom setting billet apical grafting tapped through hole 21 in weld seam cushion block groove 23 are logical in billet apical grafting screw thread
Be spirally connected billet apical grafting bolt 22 in hole 21, and billet 24 is arranged in weld seam cushion block groove 23, aluminium is arranged on billet 24
Backing plate 25 is provided with aluminium alloy thick plate edge rolling shell longitudinal seam gap 3 above aluminium backing plate 25；It steps down in left side U-shaped limited block
Setting left side U-shaped limited block apical grafting bolt thread through-hole 14, left side U-shaped limited block apical grafting on the left side cheese block column of groove 11
Bolt 15 is screwed onto left side U-shaped limited block apical grafting bolt thread through-hole 14；On the right side of right side U-shaped limited block resigning groove 16
Setting right side U-shaped limited block apical grafting bolt thread through-hole 19 on cheese block column, right side U-shaped limited block apical grafting bolt 20 is screwed onto
In right side U-shaped limited block apical grafting bolt thread through-hole 19；
Third step adjusts fastening nut 7 by rotation, adjusts the spacing between left side block 4 and right side block 5, enables aluminum alloy to
Slab edge rolling shell longitudinal seam gap 3 is less than or equal to 0. 25 millimeters；13 He of bolt is adjusted by rotating left side limited block respectively
Right side limited block adjusts bolt 18, makes left side U-shaped limited block 8 that about 1 straight flange on the left of edge rolling shell be driven to adjust, and makes right side U-shaped
Limited block 9 drives about 2 straight flange on the right side of edge rolling shell to adjust, and reaches the misalignment of weld seam in a thickness direction less than or equal to 0.
25 millimeters；
4th step, rotation left side U-shaped limited block apical grafting bolt 15, make the right end and left side U of left side U-shaped limited block apical grafting bolt 15
Shape limited block 8 is held out against；Rotation right side U-shaped limited block apical grafting bolt 20 makes the left end and the right side of right side U-shaped limited block apical grafting bolt 20
Side U-shaped limited block 9 is held out against；By rotating billet apical grafting bolt 22, make aluminium backing plate 25 and the vertical weldering of aluminium alloy thick plate edge rolling shell
3 apical grafting of gap is together；
5th step is removed to elongation bolt 6, real to aluminium alloy thick plate edge rolling shell longitudinal seam gap 3 with vacuum electron beam welder
Welding connects.
Claims (1)
1. a kind of aluminium alloy thick plate edge rolling shell longitudinal seam tightens localization method, comprising the following steps:
The first step is respectively arranged on the left of 100 millimeters of edge rolling shell in the two sides of the aluminium alloy thick plate edge rolling shell longitudinal seam of edge rolling
Straight flange (2) on the right side of straight flange (1) and edge rolling shell is fixedly welded left side block on the outer surface of straight flange (1) on the left of the edge rolling shell
(4), right side block (5) is fixedly welded on the right side of the edge rolling shell on the outer surface of straight flange (2), block (4) and right side are kept off in left side
It wears and is connect to bolt (6) are elongated, in tail end setting adjustment fastening nut (7) to bolt (6) are elongated between block (5)；In edge rolling shell
Left side U-shaped limited block (8), the inner surface of straight flange (2) on the right side of edge rolling shell are fixedly welded on the left of body on the inner surface of straight flange (1)
On be fixedly welded right side U-shaped limited block (9), be provided on the bottom surface of left side U-shaped limited block (8) left side limited block adjustment spiral shell
Hole (12) is provided with right side limited block adjustment screw hole (17) on the bottom surface of right side U-shaped limited block (9), left in edge rolling shell
Cheese block (10) are set below side straight flange (1) and on the right side of edge rolling shell below straight flange (2), in the upper top surface of cheese block (10)
Weld seam cushion block groove (23) are arranged in middle part, are arranged on the upper top surface of the cheese block (10) in the left side of weld seam cushion block groove (23) left
Side U-shaped limited block resigning groove (11) is arranged right on the upper top surface of the cheese block (10) on the right side of weld seam cushion block groove (23)
Side limited block resigning groove (16) adjusts bolt in the slot bottom setting left side limited block of left side limited block resigning groove (11) and passes through
Hole (26) adjusts bolt in the slot bottom setting right side limited block of right side U-shaped limited block resigning groove (16) and passes through hole (27), left side
Limited block adjusts bolt (13) and adjusts afterwards with left side limited block across left side limited block adjusting bolt across hole (26) from bottom to top
Screw hole (12) is screwed together, and right side limited block adjusts bolt (18) and passes through right side limited block adjusting bolt from bottom to top across hole
(27) it is screwed together afterwards with right side limited block adjustment screw hole (17)；Left side U-shaped limited block (8) is arranged in left side U-shaped limited block
In resigning groove (11), right side U-shaped limited block (9) is arranged in right side U-shaped limited block resigning groove (16)；
Second step, slot bottom setting billet apical grafting tapped through hole (21) in weld seam cushion block groove (23), in billet apical grafting spiral shell
Be spirally connected billet apical grafting bolt (22) in line through-hole (21), billet (24) is arranged in weld seam cushion block groove (23), in steel pad
Aluminium backing plate (25) are set on plate (24), are provided with aluminium alloy thick plate edge rolling shell longitudinal seam gap (3) above aluminium backing plate (25)；
Setting left side U-shaped limited block apical grafting bolt thread is logical on the left side cheese block column of left side U-shaped limited block resigning groove (11)
Hole (14), left side U-shaped limited block apical grafting bolt (15) are screwed onto left side U-shaped limited block apical grafting bolt thread through-hole (14)；?
Setting right side U-shaped limited block apical grafting bolt thread through-hole on the right side cheese block column of right side U-shaped limited block resigning groove (16)
(19), right side U-shaped limited block apical grafting bolt (20) is screwed onto right side U-shaped limited block apical grafting bolt thread through-hole (19)；
Third step adjusts fastening nut (7) by rotation, adjusts the spacing between left side block (4) and right side block (5), makes
Aluminium alloy thick plate edge rolling shell longitudinal seam gap (3) is less than or equal to 0. 25 millimeters；It is adjusted by rotating left side limited block respectively
Bolt (13) and right side limited block adjust bolt (18), drive left side U-shaped limited block (8) on the left of edge rolling shell on straight flange (1)
Lower adjustment makes right side U-shaped limited block (9) that straight flange (2) on the right side of edge rolling shell be driven to adjust up and down, reaches weld seam in a thickness direction
Misalignment be less than or equal to 0. 25 millimeters；
4th step, rotation left side U-shaped limited block apical grafting bolt (15), make left side U-shaped limited block apical grafting bolt (15) right end with
Left side U-shaped limited block (8) is held out against；Rotation right side U-shaped limited block apical grafting bolt (20) makes right side U-shaped limited block apical grafting bolt
(20) left end is held out against with right side U-shaped limited block (9)；By rotating billet apical grafting bolt (22), make aluminium backing plate (25) and aluminium
Alloy plate edge rolling shell longitudinal seam gap (3) apical grafting is together；
5th step is removed to bolt (6) are elongated, with vacuum electron beam welder to aluminium alloy thick plate edge rolling shell longitudinal seam gap
(3) implement welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576462.2A CN109848537B (en) | 2018-12-22 | 2018-12-22 | Method for tightening and positioning longitudinal welding seam of aluminum alloy thick plate rolling shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576462.2A CN109848537B (en) | 2018-12-22 | 2018-12-22 | Method for tightening and positioning longitudinal welding seam of aluminum alloy thick plate rolling shell |
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| CN109848537A true CN109848537A (en) | 2019-06-07 |
| CN109848537B CN109848537B (en) | 2022-04-12 |
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| CN109848537B (en) | 2022-04-12 |
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