CN105880908A - Device and method for controlling welding deformation of thin plate butt-joint - Google Patents

Device and method for controlling welding deformation of thin plate butt-joint Download PDF

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Publication number
CN105880908A
CN105880908A CN201610381093.6A CN201610381093A CN105880908A CN 105880908 A CN105880908 A CN 105880908A CN 201610381093 A CN201610381093 A CN 201610381093A CN 105880908 A CN105880908 A CN 105880908A
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CN
China
Prior art keywords
sheet
welding
docking
welding deformation
iron core
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CN201610381093.6A
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Chinese (zh)
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CN105880908B (en
Inventor
何明
石教伦
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YICHANG JIANGXIA MARINE MACHINERY CO Ltd
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YICHANG JIANGXIA MARINE MACHINERY CO Ltd
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/003Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0461Welding tables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/18Sheet panels

Abstract

The invention provides a device and a method for controlling welding deformation of thin plate butt-joint. The device comprises a welding platform, wherein liquid charge holes used for charging a cooling liquid are arranged in the welding platform and at positions below a butt-joint welding seam; and a compression device used for compressing thin plates is further arranged on the welding platform. The welding platform is made from copper. During welding, the two thin plates are compressed according to a butt-joint welding structure by the compression device, and the interiors of the liquid charge holes are charged with the cooling liquid; welding is completed, and the compression device is released after the thin plates are cooled; and the welding deformation of thin plate butt-joint is reduced through the abovementioned steps. With the adoption of the abovementioned structure and method, lots of heat generated during welding is brought by the cooling liquid, the thin plates are compressed by using the compression device above the thin plates cooperatively, and pressure springs on the compression device are capable of adjusting a compression force according to different plate thicknesses, so that the welding deformation of the thin plates can be quite effectively controlled.

Description

Control the device and method of the welding deformation of sheet member docking
Technical field
The present invention relates to welding field, the device and method of a kind of welding deformation controlling sheet member docking.
Background technology
Plated construction is widely used in railway transportation, Marine engineering, aerospace flight vehicle, auto industry, sea The large scale structures such as the superstructure of drilling-production platform manufacture field.Thin plate has lightweight, processing performance good (easily processing, easily Molding) and the feature such as easy to connect, the solderable metal plate less than 5mm of the thin plate dinger thickness degree in this example.But thin plate is due to it certainly Body constraint (restraint) degree is little, and during welding, deformation is relatively big, deformation include but not limited to cross-direction shrinkage, longitudinal contraction, rotary deformation, angular deformation and Flexural deformation etc., see shown in Fig. 5, can produce wave transformation due to unstability, and be difficult to correct, particularly to one time serious The material that a little thermal coefficient of expansions are bigger, deformation is particularly acute.Deformation has not only severely impacted the structural strength of thin plate itself, system Manufacturing accuracy and serviceability, even can make welding operation to proceed because of deformation, the most necessary to plate sheet welding Deformed Control Technology, the influence factor produced including welding deformation and control technique are studied, and put into practice with Instructing manufacture, improve Product quality.
The main method controlling thin plate deformation at present has:
The measure of process aspect has: correct selection welding method and welding material;Prestrain method and rigid fixation.
Rigid fixation is to be fixed on by weldment on sufficiently rigid tire fixture, or interim welding equipment supports, to increase The rigidity of component reduces welding deformation, removes again and rigidly fix, at this moment when all weld seams are cooled to room temperature on component to be welded The deformation that component produces will be significantly smaller than welding deformation in a free state.If coordinating other to control arranging of welding deformation again Execute, will make weld industry within product technology tolerance scope.
Reversible deformation rule is to correct thin plate welding deformation by reversely giving more mechanically deform.Such as weld when thin plate Connect when being deformed into inside arc-shaped deformation, then by giving outside arc-shaped deformation, and deformation extent exceedes inside arc-shaped deformation amount Correct.
But the Deformation control of above two method is the most not ideal enough, and all operate complex.
Summary of the invention
The technical problem to be solved is to provide device and the side of a kind of welding deformation controlling sheet member docking Method, it is possible to effectively control the welding deformation of sheet member, the correction work of less postwelding.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of welding controlling sheet member docking The device of deformation, including jig, on jig, the position below butt weld is provided with for being passed through the logical of coolant Fluid apertures;
Jig is additionally provided with the hold down gag for compressing sheet member.
Preferably in scheme, described jig material is copper.
Preferably in scheme, described liquid-through hole is multiple, and the direction along butt weld is arranged;Between multiple liquid-through holes Parallel to each other, and interconnect.
Preferably in scheme, described hold down gag is two groups, lays respectively at the both sides of butt weld.
Preferably in scheme, in described hold down gag, top board is fixing with forcing press to be connected, and top board is provided with multiple cunning Dynamic guide rod, the lower end of guide rod is fixedly connected with the pressing plate;On guide rod, between top board and pressing plate, it is provided with stage clip.
Preferably in scheme, in described hold down gag, it is provided with iron core in the jig below sheet member, outside iron core Being provided with coil, coil is connected with output control device;
It is arranged over iron core in sheet member with the pressing plate of magnetic attraction.
Preferably in scheme, in described hold down gag, it is provided with iron core in the jig below sheet member, outside iron core Being provided with coil, coil is connected with output control device;
Position corresponding with iron core above sheet member is provided with iron core with the upright post rod of magnetic attraction, and upright post rod is with top board even Connecing, be provided with multiple slidably guide rod on top board, the lower end of guide rod is fixedly connected with the pressing plate;On guide rod, top board and pressing plate Between be provided with stage clip.
Preferably in scheme, the top of upright post rod is provided with thread segment, and thread segment is connected through top board with adjustable nut.
Preferably in scheme, pressing plate is provided with pressure transducer.
The device of a kind of welding deformation using above-mentioned control sheet member to dock carries out the method welded, including following step Rapid:
One, with hold down gag, two panels sheet member is compressed by the structure of butt welding, by the gap of design parameter regulation butt welding;
Size according to welding parameter regulation thrust;
Two, in liquid-through hole, coolant it is passed through;
Three, weld sheet member according to welding procedure, form butt weld;
Four, after sheet member cools down, hold down gag is unclamped;
The weld industry of sheet member docking is realized by above step.
Expanding owing to steel plate is heated during sheet member welding, shrink, during welding, the temperature of commissure is far above weld seam week The temperature enclosed, causes being heated of steel plate uneven, expand, constriction coefficient inconsistent, so there will be deformation, sheet member after Han Jie In the majority with torsional deformation and wave transformation, the workload of correction is big.
The device and method of a kind of welding deformation controlling sheet member docking that the present invention provides, by using above knot Structure and method, the heat making coolant produce when taking away a large amount of welding, coordinate and use hold down gag by thin plate above sheet member Part compresses, and the stage clip on hold down gag is automatically adjusted the size of thrust according to different thicknesss of slab, thus very effective prevents The welding deformation of sheet member.The structures and methods of the present invention are simple to operate, easy to use, it is possible to effectively control weldment Deformation, reduces the correction work of sheet member postwelding.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the main TV structure schematic diagram of the present invention.
Fig. 2 is the perspective view of the present invention.
Fig. 3 is the structural representation of another improved structure of the present invention.
Fig. 4 is the structural representation of another improved structure of the present invention.
Fig. 5 is the schematic diagram of sheet member deformation in prior art.
Fig. 6 is structural representation when being connected with forcing press of the hold down gag in the present invention.
In figure: jig 1, pressing plate 2, stage clip 3, top board 4, guide rod 5, butt weld 6, sheet member 7, liquid-through hole 8, coil 9, output control device 10, upright post rod 11, iron core 12, pressure transducer 13, thread segment 14, adjustable nut 15.
Detailed description of the invention
Embodiment 1:
In Fig. 1 ~ 4, the device of a kind of welding deformation controlling sheet member docking, including jig 1, in preferred scheme, Described jig 1 material is copper.Because the heat conductivity of copper is the highest, up to 401W/m DEG C.Therefore utilize copper to make one Jig, the size of jig 1 determines according to size and the practical situation of soldering part.In butt welding on jig 1 Position below seam 6 is provided with the liquid-through hole 8 for being passed through coolant;The heat of jig made of copper will be transmitted to by coolant Amount conducts rapidly, and the coolant in this example uses water or liquid nitrogen.Platform can also use as liner simultaneously, works as sheet member Docking welding time, can on platform single-side welding double-side forming.
Jig 1 is additionally provided with the hold down gag for compressing sheet member 7.When sheet member 7 is placed on jig After, using hold down gag sheet member 7 to be compressed, then weld, workpiece is rigidly fixed by this hold down gag, Ke Yiyou Angular deformation, flexural deformation and the wave transformation etc. produced when the control sheet member 7 of effect is welded.Stage clip above hold down gag can The size of thrust is regulated according to thickness of slab.
The principle of the present invention is:
(1)
σsr: limit stress;
K: the coefficient relevant with the support situation of sheet member.
T: lamella thickness;
B: plate width;
In formula (1), the thickness of slab ratio wide with plate is the least, and limit stress is the least, the easiest unstability of thin plate.Therefore, may be used To set about reducing wave transformation in terms of reducing residual compressive stress and improving limit stress, thin plate rigidity two.Welding unstability becomes Shape is mainly affected by thin plate geometry, plate area, thickness, plate initial imperfection and support conditions, simultaneously welding method, Welding procedure and the degree of welding procedure appreciable impact welding deformation.
Open single V groove welding cross-direction shrinkage approximation
(2)
Square groove welding cross-direction shrinkage approximation
(3)
y1: cross-direction shrinkage approximation during single V groove
y2: cross-direction shrinkage approximation during square groove
E: pattern modulus e=2.718282
X: steel plate thickness
When assuming 3mm Plate Welding, then the transverse shrinkage values opening single V groove and square groove is respectively
Therefore no matter it being out single V groove or square groove, very big during amount of contraction after 3mm Plate Welding, this also causes postwelding Deform the biggest.
By using the anti-deformation thin plate Splicing welding machine of foregoing invention, use pressing plate the sheet member 7 of welding to be compressed, be soldered Sheet member 7 decrease the degree of freedom in 6 directions so that it is flexural deformation and wave transformation cannot be produced.Simultaneously at sheet member 7 end The jig 1 in portion is passed through coolant, reduces the temperature of sheet member 7 after welding, it is possible to effectively control due to welding temperature mistake Height causes expansion and the contraction distortion that sheet member 7 produces.
Can obtain according to conduction of heat formula:
(4)
λ: heat conductivity, the heat conductivity of copper is 401W/m DEG C;
δ: thickness of slab, i.e. conductive medium length;
T1: spread out of heat object temperature;
T2: incoming heat object temperature;
T: conduction time;
A: contact area.
Assume corresponding circle of sensation temperature 1100 DEG C during gas shield welding, the hole centre-to-centre spacing jig 10mm of logical coolant, coolant is- The liquid nitrogen of 196 DEG C, weld width is 5mm, so the weld seam of every meter long spreads out of heat at 1s is:
The heat produced when effectively taking away welding by coolant bottom sheet member 7 as can be seen here, it is possible to effectively control Welding temperature, prevents the deformation that produces because during welding temperature is too high.
Preferably in scheme such as Fig. 1 ~ 4, described liquid-through hole 8 is multiple, and the direction along butt weld 6 is arranged;Multiple Between liquid-through hole 8 parallel to each other, and interconnect.Thus structure, improves cooling effectiveness.
Preferably in scheme such as Fig. 2, described hold down gag is two groups, lays respectively at the both sides of butt weld 6.
Embodiment 2:
On the basis of embodiment 1, in preferred scheme such as Fig. 1, in described hold down gag, top board 4 is fixing with forcing press even Connecing, forcing press is hydraulic press, as shown in Figure 6.Top board 4 is provided with multiple slidably guide rod 5, the lower end of guide rod 5 and pressing plate 2 Fixing connection;On guide rod 5, between top board 4 and pressing plate 2, it is provided with stage clip 3.Thus structure, controls the pressure pressed down by forcing press Power, and the stage clip 3 arranged can be automatically according to thickness of slab to regulate the size of thrust, so that pressure distribution is uniform.
In further preferred scheme, pressing plate 2 is provided with pressure transducer 13.Thus structure, it is simple to automatically control pressure The output pressure of power machine, on the basis of guaranteeing to control welding deformation, also avoids damaging sheet member 7.
Embodiment 3:
In example 2, needing to use forcing press, and forcing press is as main equipment, uses frequency higher, frequently taking can shadow Ring the production efficiency in whole workshop.
On the basis of embodiment 1, in preferred scheme such as Fig. 3, in described hold down gag, below sheet member 7 Being provided with iron core 12 in jig 1, iron core 12 is externally provided with coil 9, and coil 9 is connected with output control device 10;
It is arranged over iron core 12 in sheet member 7 with the pressing plate 2 of magnetic attraction.In this example, by the way of using magnetic attraction Sheet member 7 is compressed, the voltage exported by regulation by output control device 10 or the size of electric current, regulate the big of the suction-combining force Little.Thus structure, reduces and takies for forcing press.By arranging the quantity of suitable iron core 12, it is ensured that pressure is enough.Enter one Walk in preferred scheme, pressing plate 2 is provided with pressure transducer 13.Thus structure, it is simple to the output pressure of automatic pressure control machine Power, on the basis of guaranteeing to control welding deformation, also avoids damaging sheet member 7.
In further preferred scheme such as Fig. 4, in described hold down gag, set in the jig 1 below sheet member 7 Cored 12, iron core 12 is externally provided with coil 9, and coil 9 is connected with output control device 10;
Position corresponding with iron core 12 above sheet member 7 is provided with iron core 12 with the upright post rod 11 of magnetic attraction, upright post rod 11 are connected with top board 4, are provided with multiple slidably guide rod 5 on the top plate 4, and the lower end of guide rod 5 is fixing with pressing plate 2 to be connected;Leading On bar 5, between top board 4 and pressing plate 2, it is provided with stage clip 3.
Preferably in scheme, the top of upright post rod 11 is provided with thread segment 14, and thread segment 14 is through top board 4 and adjustable nut 15 Connect.In this example, the size of pressure is adjusted by adjustable nut 15, so that it is guaranteed that pressure is in suitable scope.The pressure arranged Spring 3 can regulate the size of thrust automatically according to thickness of slab, so that pressure equilibrium.
Embodiment 4:
On the basis of embodiment 1 ~ 3, the device of a kind of welding deformation using above-mentioned control sheet member to dock welds Method, comprise the following steps:
One, with hold down gag, two panels sheet member 7 is compressed by the structure of butt welding, by the gap of design parameter regulation butt welding, I.e. gap between two panels sheet member 7;
The size of the thrust according to welding parameter regulation hold down gag;
Two, in liquid-through hole 8, it is passed through coolant;
Three, weld sheet member 7 according to welding procedure, form butt weld 6;
Four, after sheet member 7 cools down, close the supply of coolant, unclamp hold down gag, take out the sheet member 7 after welding;
The welding deformation making sheet member dock by above step reduces, thus effectively controls sheet member welding deformation.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the restriction for the present invention, mutually On the premise of not conflicting, every technical characteristic that the present invention records can be combined with each other.Protection scope of the present invention should be with right Require the technical scheme recorded, be protection model including the equivalents of technical characteristic in the technical scheme that claim is recorded Enclose.Equivalent the most in this range is improved, also within protection scope of the present invention.

Claims (10)

1. control a device for the welding deformation of sheet member docking, including jig (1), it is characterized in that: jig (1) On butt weld (6) lower section position be provided with the liquid-through hole (8) for being passed through coolant;
Jig (1) is additionally provided with the hold down gag for compressing sheet member (7).
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described weldering Connecing platform (1) material is copper.
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described is logical Fluid apertures (8) is multiple, and the direction along butt weld (6) is arranged;Between multiple liquid-through holes (8) parallel to each other, and interconnect.
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described pressure Tight device is two groups, lays respectively at the both sides of butt weld (6).
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described pressure In tight device, top board (4) is fixing with forcing press to be connected, and top board (4) is provided with multiple slidably guide rod (5), under guide rod (5) Hold be connected fixing with pressing plate (2);On guide rod (5), between top board (4) and pressing plate (2), it is provided with stage clip (3).
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described pressure In tight device, being provided with iron core (12) in the jig (1) of sheet member (7) lower section, iron core (12) is externally provided with coil (9), line Circle (9) is connected with output control device (10);
It is arranged over iron core (12) in sheet member (7) with the pressing plate (2) of magnetic attraction.
The device of a kind of welding deformation controlling sheet member docking the most according to claim 1, is characterized in that: described pressure In tight device, being provided with iron core (12) in the jig (1) of sheet member (7) lower section, iron core (12) is externally provided with coil (9), line Circle (9) is connected with output control device (10);
It is provided with in the position corresponding with iron core (12), sheet member (7) top and iron core (12) is with the upright post rod of magnetic attraction (11), upright post rod (11) is connected with top board (4), is provided with multiple slidably guide rod (5), the lower end of guide rod (5) on top board (4) Fix with pressing plate (2) and be connected;On guide rod (5), between top board (4) and pressing plate (2), it is provided with stage clip (3).
The device of a kind of welding deformation controlling sheet member docking the most according to claim 7, is characterized in that: upright post rod (11) top is provided with thread segment (14), and thread segment (14) is connected through top board (4) with adjustable nut (15).
9., according to the device of a kind of welding deformation controlling sheet member docking described in claim 5 or 7, it is characterized in that: in pressure Plate (2) is provided with pressure transducer (13).
10. the device of the welding deformation of the control sheet member docking that a kind uses described in any one of claim 1 ~ 9 welds Method, it is characterized in that comprising the following steps:
One, with hold down gag, two panels sheet member (7) is compressed by the structure of butt welding, by between design parameter regulation butt welding Gap;
Size according to welding parameter regulation thrust;
Two, in liquid-through hole (8), it is passed through coolant;
Three, according to welding procedure welding sheet member (7), butt weld (6) is formed;
Four, after sheet member (7) cools down, hold down gag is unclamped;
The weld industry of sheet member docking is realized by above step.
CN201610381093.6A 2016-06-01 2016-06-01 Control the device and method of the welding deformation of sheet member docking Active CN105880908B (en)

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CN106825956A (en) * 2017-03-06 2017-06-13 吉林大学 A kind of cooling device and technique for improving the not heterogeneous high-strength steel laser welding point toughness of uniform thickness
CN107030369A (en) * 2016-11-18 2017-08-11 广西大学 A kind of large-sized aluminium alloy flat board agitating friction welding clamp
CN108907564A (en) * 2018-08-03 2018-11-30 中国航空工业集团公司雷华电子技术研究所 A kind of welding tooling compensating microwave printed board Warping Effect
CN109014696A (en) * 2018-07-27 2018-12-18 芜湖同创模具机械有限公司 A kind of thin metallic tubd welder
CN109093234A (en) * 2018-09-30 2018-12-28 中国二十冶集团有限公司 Water cooling anti-deformation device and construction method are rigidly clamped for the butt welding of steel plate submerged arc
CN109530916A (en) * 2018-12-20 2019-03-29 中国航空制造技术研究院 The laser soldering device of T connector and the control method of welding deformation
CN110064880A (en) * 2019-05-09 2019-07-30 东南大学 A kind of tube sheet composite construction built-up welding control device and its application method
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CN107030369A (en) * 2016-11-18 2017-08-11 广西大学 A kind of large-sized aluminium alloy flat board agitating friction welding clamp
CN106825956A (en) * 2017-03-06 2017-06-13 吉林大学 A kind of cooling device and technique for improving the not heterogeneous high-strength steel laser welding point toughness of uniform thickness
CN109014696A (en) * 2018-07-27 2018-12-18 芜湖同创模具机械有限公司 A kind of thin metallic tubd welder
CN108907564A (en) * 2018-08-03 2018-11-30 中国航空工业集团公司雷华电子技术研究所 A kind of welding tooling compensating microwave printed board Warping Effect
CN109093234A (en) * 2018-09-30 2018-12-28 中国二十冶集团有限公司 Water cooling anti-deformation device and construction method are rigidly clamped for the butt welding of steel plate submerged arc
CN109530916A (en) * 2018-12-20 2019-03-29 中国航空制造技术研究院 The laser soldering device of T connector and the control method of welding deformation
CN110064880A (en) * 2019-05-09 2019-07-30 东南大学 A kind of tube sheet composite construction built-up welding control device and its application method
CN110434458A (en) * 2019-07-19 2019-11-12 上海宝钢阿赛洛激光拼焊有限公司 The assembled tool fixture of automobile knocker laser assembly solder plate
CN110434461A (en) * 2019-07-30 2019-11-12 中车青岛四方机车车辆股份有限公司 Laser welding test platform
CN110919207A (en) * 2019-09-11 2020-03-27 南京航空航天大学 Clamping system for double-laser-beam double-side mirror-image welding of butt joint structure
CN110936007A (en) * 2019-12-23 2020-03-31 上海电机学院 Vacuum electron beam welding table
CN110936007B (en) * 2019-12-23 2021-09-28 上海电机学院 Vacuum electron beam welding table

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