CN109128444A - Prevent the welding method and device of steam head plate welding deformation - Google Patents

Prevent the welding method and device of steam head plate welding deformation Download PDF

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Publication number
CN109128444A
CN109128444A CN201811064077.XA CN201811064077A CN109128444A CN 109128444 A CN109128444 A CN 109128444A CN 201811064077 A CN201811064077 A CN 201811064077A CN 109128444 A CN109128444 A CN 109128444A
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CN
China
Prior art keywords
welding
steam head
head plate
gusset
deformation
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CN201811064077.XA
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Chinese (zh)
Inventor
李利元
黄孙民
潘泽蝉
黄增
谢军
韦振宇
陈德文
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Guangxi Construction Engineering Group No1 Installation Co Ltd
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Guangxi Construction Engineering Group No1 Installation Co Ltd
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Priority to CN201811064077.XA priority Critical patent/CN109128444A/en
Publication of CN109128444A publication Critical patent/CN109128444A/en
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    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment
    • 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
    • B23K9/00Arc welding or cutting
    • B23K9/32Accessories

Abstract

The invention discloses the welding methods and device that prevent steam head plate welding deformation, belong to welding technology field, the welding method includes the following steps: selection steam head plate, utilizes the arcuate die of the opposite direction of prestrain method manufacture steam head plate welding deformation according to the quantity of the steam head gusset welded in steam head plate;Steam head plate is fitted on arcuate die, is clamped with shrimp bow code;Steam head gusset is welded in steam head plate, the sequence for welding steam head gusset is to weld from intermediate toward both ends, and one piece of interval gusset welding, after being welded to both ends, the steam head gusset of midfeather is successively welded from the intermediate mode toward both ends again, welding is completed, after the completion of welding, rear is cooled to room temperature to weld seam to disassemble steam head plate, is then smoothed using welding deformation of the hydraulic press to part.Weld appearance is excellent when this method, and component is also beautiful, guarantees the requisite quality of entire engineering stainless steel equipment, also ensures the safety and efficiently production of factory.

Description

Prevent the welding method and device of steam head plate welding deformation
Technical field
The present invention relates to welding technology fields, more particularly to prevent the welding method and device of steam head plate welding deformation.
Background technique
In Uruguay's project equipment (~7 effect of the effect of evaporator 2, surface condenser), the processing of internals some vapor head plate Manufacture is that emphasis is also one of difficult point.Its material is ASME SA240M 304, and main body plate is with a thickness of 16mm, gusset thickness For 16mm.Although using CO2 stainless flux-cored wire in terms of welding to weld, and use low current, weld at a slow speed, welds angle Weld bead height is the welding procedure of 5mm, but since welding capacity is larger, welding deformation not of uniform size still occurs.All steamings Vapour head basic structure is all as shown in Figure 1.It is generally made of four components, 1K, 2K, 3K, 4K as shown in the figure.Each components That is the welding of main board and gusset can all cause local welding deformation, if will be to the entirety of steam head without effectively controlling Assembling adversely affects.Now introduce welding process measure, welding points for attention and the reversible deformation control of steam head plate.
In in welding metal and substrate, weld seam is formed with due to being locally heated for expansion and contraction in the welding process Very big temperature step, volume when welding metal attempts normal contraction to room temperature when cooling.But fusing welding metal because Substrate and suffer restraints, will be generated between weld metal and substrate stress concentration.Therefore weld seam near zone generates stress collection In and stretch bending or it is thinning, these be more than weld metal yield stress concentration release is formed permanent deformation. When welding temperature is close to room temperature, entire substrate suffers restraints and can not deform, and the dilation matrices of metal are just close to yield stress.Such as Fruit constrains (fixture fixed signal or anti-convergent force) and cancels, and residual stress release substrate will migrate, and welding workpiece will generate Deformation.Metal interior structures are called welding stress because welding non-uniform heating and the cooling internal stress generated, by welding stress Caused by deformation be called welding deformation.
Welding residual stress and strain not only influence the precision and good appearance degree of welding structure size, but also also may be used Welded bearing capacity can be reduced to influence its service performance and service life.Welding deformation is residual simultaneously with residual stress It is stored in welding structure, welding residual deformation will cause the variation of Components Shape and size, and such as longitudinally, laterally shrinking makes component ruler It is very little to shorten, if component can be made to scrap beyond the range that dimensional tolerance allows.
Summary of the invention
The purpose of the present invention is to provide the welding methods and device that prevent steam head plate welding deformation, solve existing steam The technical issues of head plate is easily deformed when welding.
The welding method of steam head plate welding deformation is prevented, the welding method includes the following steps:
Steam head plate is chosen, steam is manufactured using prestrain method according to the quantity of the steam head gusset welded in steam head plate The arcuate die of the opposite direction of head plate welding deformation;
Steam head plate is fitted on arcuate die, is clamped with shrimp bow code;
Steam head gusset is welded in steam head plate, welds the sequence of steam head gusset to weld from intermediate toward both ends, and Be spaced the welding of one piece of gusset, after being welded to both ends, then from intermediate toward the mode at both ends the steam head gusset of midfeather according to Welding is completed in secondary welding,
After the completion of welding, rear is cooled to room temperature to weld seam and disassembles steam head plate, is then played a game using hydraulic press The welding deformation in portion is smoothed.
Further, the specific process using prestrain method manufacture arcuate die are as follows:
The quantity for calculating the steam head gusset welded in steam head plate, it is cold according to each steam head gusset welding of sample measurement The distance between but the angle for causing steam head plate to deform afterwards, while measuring two pieces of steam head gussets, then obtain two pieces of steam heads Steam head plate deformation radian between gusset is the angle of steam head plate deformation, according to arcuate die at angle manufacture.
Further, stainless steel mould cushion block is provided on the arcuate die, arcuate die both sides make
Support is fixed with support rod, fixed support bottom is fixed on the guide rail of straight line, fixed arcuate die
Structure.
Further, the welding groove processing to steam head gusset is needed before the welding steam head gusset,
The detailed process of welding groove processing are as follows:
30 ° of plasma cutting machine well cutting of the first groove and 15 ° of the second groove are first used, is then carried out using edge milling machines It is flat to groove and plate face milling.
Further, welding preparation and welding parameter is needed to select before the welding steam head gusset,
Welding preparation removes oxide skin, slag and the superficial layer of groove face, and uneven place is polished
It is smooth;
Brush protection oil or lime paste, prevent spatter within the scope of the steam head gusset weldment groove each 100mm in two sides Object stains weldment surface;
When welding, reversed polarity is used when flux-cored wire direct current welds;Protective gas is CO2, gas flow with 20~ 25L/min;Weldment is at a distance from tip with 15~20mm.
Further, when the welding steam head gusset, interlayer need to remove the splash of slag and two sides;Face of weld is not Must there are crackle, macroscopic surface pores, slag inclusion and overlap, surface weld and base material are rounding off, and weld seam is neat, flat Sliding is in uniform corrugated, and when welding, the interlayer temperature between steam head gusset and steam head gusset is lower than 60 degrees Celsius.
Further, the detailed process of the welding steam head gusset are as follows:
Divide average out to upper left side pin, lower left pin, upper right side pin steam head gusset and steam head plate contact surface With lower right pin, the upper left side position pin of steam head gusset is first welded, then welds lower right pin, then weld upper right side Pin finally welds lower left pin.
The welder of steam head plate welding deformation is prevented, the welder includes several shrimps bow code, support rod, steaming Vapour head plate, steam head gusset, arcuate die and several pieces of mould pad blocks, the arcuate die are set as curved plate-like structure, institute It states arcuate die convex surface to set up, support rod is arranged in arcuate die bottom, and several pieces of mould pad blocks are uniformly and fixedly arranged at Arcuate die upper surface, steam head plate are fitted in arcuate die upper surface, bend code steam head plate and arc by several shrimps Mold cramping, the steam head gusset are welded in steam head plate.
Further, the invention also includes guide rail, the number of the guide rail is two, and guide rail is separately positioned on arcuate die Bottom, and be arranged in parallel, the bottom of support rod is fixed on guide rail, and the both ends of the arcuate die are fixedly connected with guide rail.
Further, the steam head plate and steam head gusset welding position are set as welding groove, and welding groove includes First groove and the second groove, the first groove are 30 °, and the second groove is 15 °, the steam head gusset and steam head plate weld It is set as leg, the foot welding height is 5mm.
Present invention employs above-mentioned technical proposal, the present invention is had following technical effect that
By the present invention in that, according to caused deflection is welded, then deflection is preset in advance with prestrain method, from And just to cancel out each other preset deflection after welding deformation, to achieve the effect that prevent welding deformation, not only Weld appearance is excellent, and component is also beautiful, guarantees the requisite quality of entire engineering stainless steel equipment, also ensure the safety of factory with Efficiently production takes the technical measures of the above control deformation, deformation in all evaporators steam head plate welding of the project Control achieves good effect in regulating scope.
Detailed description of the invention
Fig. 1 is steam head basic structure schematic diagram of the invention.
Fig. 2 is that the steam head plate welding deformation apparatus structure that prevents of the invention is one.
Fig. 3 is of the invention to prevent steam head plate welding deformation device mould structural schematic diagram.
Fig. 4 is that effect diagram is welded in steam head plate of the invention.
Fig. 5 is the backing plate sectional view for preventing steam head plate welding deformation device of the invention.
Fig. 6 is steam head plate welding deformation variation structure chart of the invention.
Fig. 7 is steam head mainboard of the invention in gusset welding sequence schematic diagram.
Numbered in figure: 1- guide rail, 2- shrimp bow code, 3- support rod, 4- steam head plate, 5- steam head gusset, 6- arcuate die, 7- mould pad block, the first groove of 8-, the second groove of 9-, 10- leg.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, referring to the drawings and preferred reality is enumerated Example is applied, the present invention is described in more detail.However, it is necessary to illustrate, many details listed in specification are only to be Reader is set to have a thorough explanation to one or more aspects of the present invention, it can also be with even without these specific details Realize the aspects of the invention.
It is most important factor for contraction distortion in the welding of steam head plate.(1) longitudinal contraction deforms: along weld line side Shortening to size;(2) cross-direction shrinkage deforms: along the shortening perpendicular to weld line direction size.Our processes in manufacture In be more to specify relevant technological measure such as:
A. made allowance method made allowance method is in blanking, it is contemplated that contraction distortion and the length or width ruler by baiting part Very little increasing more appropriate than design size, to compensate the contraction of weldment.Surplus number can rule of thumb formula estimation or according to production Empirically determined, the longitudinal shrinkage of general weld seam is calculated by the length of weld seam.
Steam head plate applicating example calculates:
Its mainboard specification of steam head drawing requirement is 3000*1200*16mm, and gusset specification is 1100*150*16, totally 10 Block.Its welding requirements twin fillet wolt, is continuously welded and welding angle height is not less than 5mm.
According to the empirical theory formula in Fig. 3:
Y=0.001X2-0.0359X+0.5077
Wherein: Y-cross-direction shrinkage amount approximation, mm
X-plate thickness, mm
Then: Y=0.001*162-0.0359*16+0.5077 ≈ 0.2mm
One piece of gusset of every welding causes the cross-direction shrinkage amount of mainboard to be about 0.2mm i.e. on mainboard, then in welding muti-piece Cross-direction shrinkage amount caused by after gusset just should be accumulation amount, i.e. 0.2*n (wherein n represents gusset quantity)
It is 0.2*10 ≈ for the cross-direction shrinkage amount approximation for causing mainboard total after welding 10 pieces of gussets in this example calculating 2mm.So should just there is the pre- allowance of 2mm in advance in blanking scribing line.
In addition in the width scratching process of mainboard, also there are the pre- allowances of 2mm so that edge milling machines has more spatial operations, Guarantee component within the error range.So the specification of example main body plate cutting is answered are as follows: 3002*1202*16mm.
Prestrain method prestrain method is the deformation rule according to weldment, in advance by weldment towards the phase with welding deformation before weldering Opposite direction carries out artificial deformation (anti-deformation is equal with welding deformation amount), and postwelding, welding residual deformation counteracts predeformation Amount, makes component be returned to the geometry profile and size of design requirement, to achieve the purpose that offset welding deformation.Carrying out steam It is 16mm according to drawing requirement steam head plate material and gusset plate when head processing and manufacturing, welding angle height is 5mm.Accurate selection is closed Suitable mould is an important measures of welding anti-distortion technique, and the bigger than normal or less than normal of radian will all directly affect the plate after welding Material flatness.After fillet in normal shear is all soldered, as weld seam is constantly cooling and shrinks, angular distortion is gradually increased, generally In the case of the angle [alpha] of 10~18mm plate will increase to 3 °~4 °.The welding of each gusset can cause the angle of substrate certain Deformation, and have several gussets according to each steam head plate of drawing requirement, welding deformed angle will be very big.If no It takes measures, not only increases correction welding residual deformation difficulty, while the relative deviation for also resulting in assembled dimension is larger and outer It sees unsightly.
The welding method of steam head plate welding deformation is prevented, the welding method includes the following steps:
Steam head plate is chosen, steam is manufactured using prestrain method according to the quantity of the steam head gusset welded in steam head plate The arcuate die of the opposite direction of head plate welding deformation.Utilize the specific process of prestrain method manufacture arcuate die are as follows:
The quantity for calculating the steam head gusset welded in steam head plate, it is cold according to each steam head gusset welding of sample measurement The distance between but the angle for causing steam head plate to deform afterwards, while measuring two pieces of steam head gussets, then obtain two pieces of steam heads Steam head plate deformation radian between gusset is the angle of steam head plate deformation, according to arcuate die at angle manufacture.
As shown in fig. 6, prestrain method is the deformation rule according to weldment, before weldering in advance by weldment towards with welding deformation Opposite direction carries out artificial deformation (anti-deformation is equal with welding deformation amount), postwelding, and welding residual deformation counteracts pre- change Shape amount makes component be returned to the geometry profile and size of design requirement, to achieve the purpose that offset welding deformation.It is being steamed It is 16mm according to drawing requirement steam head plate material and gusset plate when vapour head fabricates, welding angle height is 5mm.Accurate selection Suitable mould is an important measures of welding anti-distortion technique, radian it is bigger than normal or less than normal will all directly affect welding after Plate flatness.After fillet in normal shear is all soldered, as weld seam is constantly cooling and shrinks, angular distortion is gradually increased, and one As in the case of the angle [alpha] of 10~18mm plate will increase to 3 °~4 °.The welding of each gusset can cause the angle one of substrate Fixed deformation, and several gussets are had according to each steam head plate of drawing requirement, welding deformed angle will be very big.If Take no action to, not only increase correction welding residual deformation difficulty, at the same the relative deviation that also results in assembled dimension it is larger and Appearance is unsightly.Such case of consideration, the method that we take reversible deformation during production.Steam head plate is used Fixture is fixed on mould, and mould shape is just contrary with welding deformation, while the method different using welding sequence. In order to guarantee that the normalization of welding should be noted during the welding process.
Steam head plate is fitted on arcuate die, is clamped with shrimp bow code.Stainless steel mould pad is provided on arcuate die Block, arcuate die both sides use the fixed support of support rod, and fixed support bottom is fixed on the guide rail of straight line, fixed arc mould Lamps structure.
Steam head gusset is welded in steam head plate, welds the sequence of steam head gusset to weld from intermediate toward both ends, and Be spaced the welding of one piece of gusset, after being welded to both ends, then from intermediate toward the mode at both ends the steam head gusset of midfeather according to Welding is completed in secondary welding.The welding groove processing to steam head gusset is needed before welding steam head gusset, welding groove processing Detailed process are as follows:
30 ° of plasma cutting machine well cutting of the first groove and 15 ° of the second groove are first used, is then carried out using edge milling machines It is flat to groove and plate face milling.
Welding preparation and welding parameter is needed to select before the welding steam head gusset,
Welding preparation removes oxide skin, slag and the superficial layer of groove face, and uneven place is polished flat;
Brush protection oil or lime paste, prevent spatter within the scope of the steam head gusset weldment groove each 100mm in two sides Object stains weldment surface;
When welding, reversed polarity is used when flux-cored wire direct current welds;Protective gas is CO2, gas flow with 20~ 25L/min;Weldment is at a distance from tip with 15~20mm.
When the welding steam head gusset, interlayer need to remove the splash of slag and two sides;Face of weld must not have crackle, Macroscopic surface pores, slag inclusion and overlap, surface weld and base material are rounding off, and weld seam is neat, smooth in uniform Corrugated, when welding, the interlayer temperature between steam head gusset and steam head gusset is lower than 60 degrees Celsius.
Welding preparation, welding parameter is selected and welding inspection
1) welding preparation, removes oxide skin, slag and the superficial layer for influencing joint quality surface of groove face, and should incite somebody to action Uneven place polishes flat;It must keep removing the various pollutions that may make weld metal carburetting;
2) within the scope of each 100mm in stainless steel weldment groove two sides, taking before welding prevents spatter object from staiing weldment The measure on surface, such as brush protection oil, lime paste;
3) forbid the striking of base material surface and the test current except groove, and arc scratch base material should be prevented.
4) reversed polarity should be used when stainless flux-cored wire direct current welds;Protective gas is CO2, gas flow with 20~ 25L/min is convenient;Weldment is advisable at a distance from tip with 15~20mm;
5) welding procedure of low_input_power is used, deposition rate is high, and speed of welding is high;
6) when welding, interlayer need to remove the splash of slag and two sides;Face of weld must not have crackle, macroscopic table Face stomata, slag inclusion, overlap etc..Welding and assembling height answers rounding off in strict accordance with drawing requirement, surface weld and base material, and weld seam is answered whole It together, is smoothly in uniform corrugated.
7) qualification of welding procedure before welding should be executed by SAME relevant criterion: in welding, it should the suitable welding of selection Parameter, as shown in table 1;In the welding process, it is necessary to so that weldment is kept lower interlayer temperature, be usually no more than 60 DEG C.
1 welding parameter of table
The detailed process of the welding steam head gusset are as follows:
Divide average out to upper left side pin, lower left pin, upper right side pin steam head gusset and steam head plate contact surface With lower right pin, the upper left side position pin of steam head gusset is first welded, then welds lower right pin, then weld upper right side Pin finally welds lower left pin.
As shown in fig. 7, total sequence of welding is both ends behind first centre, then welds the one piece of gusset in interval and connect other one piece of gusset.
That is a: the welding sequence of all two side welds of gusset be as shown in Figure 6 1. -2. -3. -4., and 4 weld seams are long It spends roughly equal;
B: preferential most intermediate that piece or two pieces of gussets;
C: 3-5-7 and 3-5 "-7 ", and two are successively preferentially next welded from centre to both sides by two welding personnels Name welder requires that identical speed is kept to be subjected to
D: the welding of 2-4-6 and 2-4 "-6 " gussets is completed with the welding sequence of c and welding method later.
The rest may be inferred.The welding method of other steam head plates is all made of said welding method use as far as possible and is symmetrically welded, closes The method that reason arranges welding sequence, maximally reduces welding deformation, while also the link for aligning uses manpower and material resources sparingly, more It ensure that the quality of product excellently.
After the completion of welding, rear is cooled to room temperature to weld seam and disassembles steam head plate, is then played a game using hydraulic press The welding deformation in portion is smoothed.Welding line interlayer temperature cannot be greater than 60 DEG C, that is, after being soldered first, weld seam temperature should be lower than 60 DEG C of welding that could start second weld seam (time interval is about 10 minutes).After the completion, after weld seam is cooled to room temperature Side disassembles steel plate, is then smoothed using welding deformation of the 700T hydraulic press to part.
As illustrated in figs. 2-7, the welder of steam head plate welding deformation is prevented, the welder includes several shrimps bow Code 2, support rod 3, steam head plate 4, steam head gusset 5, arcuate die 6 and several pieces of mould pad blocks 7.Arcuate die 6 is set as Curved plate-like structure.6 convex surface of arcuate die is set up, and support rod 3 is arranged in 6 bottom of arcuate die, several pieces of mould pad blocks 7 It is uniformly and fixedly arranged at 6 upper surface of arcuate die, steam head plate 4 is fitted in 6 upper surface of arcuate die, bends code by several shrimps 2 steam head plates 4 and arcuate die 6 clamp.Steam head gusset 5 is welded in steam head plate 4.It further include guide rail 1, the guide rail 1 number is two, and guide rail 1 is separately positioned on 6 bottom of arcuate die, and is arranged in parallel, and the bottom of support rod 3 is fixed on guide rail On 1, the both ends of the arcuate die 6 are fixedly connected with the steam head plate 4 with guide rail 1 and install with 5 welding position of steam head gusset It is set to welding groove, welding groove includes the first groove 8 and the second groove 9, and the first groove 8 is 30 °, and the second groove 9 is 15 °, The steam head gusset 5 is set as leg 10 with 4 weld of steam head plate, and 10 height of leg is 5mm.
Specific work process:
There must be stainless billet to be isolated between carbon steel welding mould;Shrimp is used between steel substrate and reversible deformation template Bend code to clamp, sees Fig. 2.Total sequence of welding is both ends behind first centre, then welds the one piece of gusset in interval and connect other one piece of gusset.
As shown in fig. 7, i.e. a: the welding sequence of all two side welds of gusset be as shown in Figure 6 1. -2. -3. -4., And 4 fusion lengths are roughly equal.
B: preferential most intermediate that piece or two pieces of gussets.
C: 3-5-7 and 3-5 "-7 ", and two are successively preferentially next welded from centre to both sides by two welding personnels Name welder requires that identical speed is kept to be subjected to.
D: the welding of 2-4-6 and 2-4 "-6 " gussets is completed with the welding sequence of c and welding method later.
The rest may be inferred.The welding method of other steam head plates is all made of said welding method use as far as possible and is symmetrically welded, closes The method that reason arranges welding sequence, maximally reduces welding deformation, while also the link for aligning uses manpower and material resources sparingly, more It ensure that the quality of product excellently.
Welding line interlayer temperature cannot be greater than 60 DEG C, that is, after being soldered first, and weld seam temperature should could start lower than 60 DEG C The welding of second weld seam (time interval is about 10 minutes).
After the completion, it is cooled to room temperature rear to weld seam to disassemble steel plate, then using 700T hydraulic press to part Welding deformation is smoothed.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (10)

1. preventing the welding method of steam head plate welding deformation, which is characterized in that the welding method includes the following steps:
Steam head plate is chosen, steam head plate is manufactured using prestrain method according to the quantity of the steam head gusset welded in steam head plate The arcuate die of the opposite direction of welding deformation;
Steam head plate is fitted on arcuate die, is clamped with shrimp bow code;
Steam head gusset is welded in steam head plate, the sequence of welding steam head gusset is to weld from intermediate toward both ends, and be spaced One piece of gusset welding successively welds the steam head gusset of midfeather after being welded to both ends, then from the intermediate mode toward both ends It connects, completes welding,
After the completion of welding, rear is cooled to room temperature to weld seam and disassembles steam head plate, then using hydraulic press to part Welding deformation is smoothed.
2. the welding method according to claim 1 for preventing steam head plate welding deformation, it is characterised in that: described using anti- The detailed process of deformation method manufacture arcuate die are as follows:
The quantity for calculating the steam head gusset welded in steam head plate, after each steam head gusset welding cooling of sample measurement The distance between the angle for causing steam head plate to deform, while measuring two pieces of steam head gussets, then obtain two pieces of steam head gussets Between steam head plate deformation radian be steam head plate deformation angle, according to arcuate die at angle manufacture.
3. the welding method according to claim 2 for preventing steam head plate welding deformation, it is characterised in that: the arc mould Stainless steel mould cushion block is provided on tool, arcuate die both sides use the fixed support of support rod, and fixed support bottom is fixed on On the guide rail of straight line, fixed arcuate die structure.
4. the welding method according to claim 1 for preventing steam head plate welding deformation, it is characterised in that: the welding is steamed The welding groove processing to steam head gusset, the detailed process of welding groove processing are needed before vapour head gusset are as follows:
30 ° of plasma cutting machine well cutting of the first groove and 15 ° of the second groove are first used, is then carried out using edge milling machines to slope Mouth and plate face milling are flat.
5. the welding method according to claim 4 for preventing steam head plate welding deformation, it is characterised in that: the welding is steamed Welding preparation and welding parameter is needed to select before vapour head gusset,
Welding preparation removes oxide skin, slag and the superficial layer of groove face, and uneven place is polished flat;
Brush protection oil or lime paste, prevent spatter object to be stained within the scope of the steam head gusset weldment groove each 100mm in two sides Dirty weldment surface;
When welding, reversed polarity is used when flux-cored wire direct current welds;Protective gas is CO2, and gas flow is with 20~25L/ min;Weldment is at a distance from tip with 15~20mm.
6. the welding method according to claim 1 for preventing steam head plate welding deformation, it is characterised in that: the welding is steamed When vapour head gusset, interlayer need to remove the splash of slag and two sides;Face of weld must not have crackle, macroscopic surface gas Hole, slag inclusion and overlap, surface weld and base material are rounding off, and weld seam is neat, is smoothly in uniform corrugated, when welding, Interlayer temperature between steam head gusset and steam head gusset is lower than 60 degrees Celsius.
7. the welding method according to claim 1 for preventing steam head plate welding deformation, it is characterised in that: the welding is steamed The detailed process of vapour head gusset are as follows:
Divide average out to upper left side pin, lower left pin, upper right side pin and the right side steam head gusset and steam head plate contact surface Lower section pin first welds the upper left side position pin of steam head gusset, then welds lower right pin, then weld upper right side and connect Foot finally welds lower left pin.
8. preventing the welder of steam head plate welding deformation, which is characterized in that the welder includes several shrimps bow code (2), support rod (3), steam head plate (4), steam head gusset (5), arcuate die (6) and several pieces of mould pad blocks (7), the arc Shape mold (6) is set as curved plate-like structure, and arcuate die (6) convex surface is set up, and support rod (3) is arranged in arc mould Has (6) bottom, several pieces of mould pad blocks (7) are uniformly and fixedly arranged at arcuate die (6) upper surface, and steam head plate (4) is fitted in Arcuate die (6) upper surface clamps steam head plate (4) and arcuate die (6) by several shrimps bow code (2), the steam Head gusset (5) is welded on steam head plate (4).
9. the welder according to claim 8 for preventing steam head plate welding deformation, it is characterised in that: further include guide rail (1), the number of the guide rail (1) is two, and guide rail (1) is separately positioned on arcuate die (6) bottom, and is arranged in parallel, support The bottom of bar (3) is fixed on guide rail (1), and the both ends of the arcuate die (6) are fixedly connected with guide rail (1).
10. the welder according to claim 8 for preventing steam head plate welding deformation, it is characterised in that: the steam Head plate (4) and steam head gusset (5) welding position are set as welding groove, and welding groove includes the first groove (8) and the second slope Mouth (9), the first groove (8) are 30 °, and the second groove (9) is 15 °, the steam head gusset (5) and steam head plate (4) weld It is set as leg (10), the leg (10) is highly 5mm.
CN201811064077.XA 2018-09-12 2018-09-12 Prevent the welding method and device of steam head plate welding deformation Pending CN109128444A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110014240A (en) * 2019-04-29 2019-07-16 中电建武汉铁塔有限公司 Electric power pylon column foot welding procedure
CN111451638A (en) * 2020-04-10 2020-07-28 北京新研创能科技有限公司 Fuel cell metal bipolar plate and welding method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110014240A (en) * 2019-04-29 2019-07-16 中电建武汉铁塔有限公司 Electric power pylon column foot welding procedure
CN111451638A (en) * 2020-04-10 2020-07-28 北京新研创能科技有限公司 Fuel cell metal bipolar plate and welding method thereof
CN111451638B (en) * 2020-04-10 2021-11-02 北京新研创能科技有限公司 Fuel cell metal bipolar plate and welding method thereof

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