CN109848525A - A kind of 3-5mm stainless steel plate single face welding and double face free forming welding method - Google Patents
A kind of 3-5mm stainless steel plate single face welding and double face free forming welding method Download PDFInfo
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- CN109848525A CN109848525A CN201910126603.9A CN201910126603A CN109848525A CN 109848525 A CN109848525 A CN 109848525A CN 201910126603 A CN201910126603 A CN 201910126603A CN 109848525 A CN109848525 A CN 109848525A
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Abstract
The present invention relates to welding technology fields, and in particular to a kind of 3-5mm stainless steel plate single face welding and double face free forming welding method.This method treats welder's part first and carries out the pretreatments such as the flat, cleaning of milling, then manual spot welding is positioned and is fixed, then workpiece to be welded is fixed on welding bench by pressing plate, welding is finally completed using CMT mix (CMT+PMC) welding procedure.This method welding preparation uses manual type, easy to operate and labor intensity is low, weld seam welding uses robot welding, and welding efficiency greatly improved in high degree of automation, welding deformation is smaller, it ensure that single face welding and double face free forming of weld seam, can accurately control the heat input of weld seam, reduce welding heat affected zone, spatter is small, substantially increases weldquality.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of 3-5mm stainless steel plate single face welding and double face free forming weldering
Connect method.
Background technique
At present in manufacturing, with a thickness of the stainless steel plate single face welding and double face free forming of 3-5mm, usually there are two types of common
Welding manner, first way uses argon arc welding welding positive first, afterwards turns over workpiece and weld the back side again；The second way
Welding is once completed in the MIG weldering (PMC) for directlying adopt pulse multiple control.However there are some problems in both the above mode.
The unstable quality of manual electric arc welding in first way needs repair welding repeatedly, and overturning work piece operations increase welding sequence, weld
Tipping folder very complicated causes production efficiency low.In addition, flue dust is larger in the welding process for first way, to execute-in-place people
Member's health harm is larger.The second way on the one hand need to customize special fixture thus higher cost, on the other hand weld
Connect that heat input is larger to cause welding deformation serious.In addition, the second way there is also splash it is larger, waste wlding the problems such as.
Chinese patent CN104858557A discloses a kind of Combination Welding side of austenitic stainless steel cut deal (9-13mm)
Method, there are following significant differences compared with the application method: 1. in the application stainless steel plate with a thickness of 3-5mm, and
Stainless steel causes be applicable in welding method entirely different in CN104858557A with a thickness of 9-13mm, plate thickness difference；2. this Shen
Please in workpiece to be welded be not necessarily to bevel, and part to be welded interface need to open up V-butt in CN104858557A, and technique is more complicated
Cost is higher；3. the application uses CMT mix welding procedure one-pass molding, and substep is needed to carry out in CN104858557A, specifically
From the point of view of first weld bottoming with pulse plasma, then with pulsation argon tungsten-arc welding capping to complete to weld, the two welding procedure has
The difference of essence, can not mutually use for reference.
In summary, there is presently no find a kind of good, at low cost, simple process 3-5mm stainless steel plate of welding effect
The successful exploitation of single face welding and double face free forming welding procedure, associated welds equipment and technique is especially urgent and necessary.
Summary of the invention
It is an object of the invention to overcome the above problem of the existing technology, a kind of 3-5mm stainless steel plate single side is provided
Two-sided free forming welding method is welded, this method is specific as follows: (a) treating welder's part (i.e. the stainless steel plate of 3-5mm thickness) progress
Pretreatment；(b) spot welding is carried out to weld seam；(c) workpiece to be welded is fixed on welding bench by pressing plate and fixture, makes weld seam
Above the V-type forming tank of welding bench；(d) by cooling-water duct and protection gas channel respectively by cooling water and protection
Gas is delivered to inside welding bench, is treated welder's part and is welded.
Further, step (a) pretreatment includes treating the end face to be welded of welder's part to carry out that milling is flat, high pressure gas is blown
Sweep, organic solvent cleaning wiping etc., so as to the impurity and greasy dirt being eliminated as much as in weld seam and its surrounding 15mm.Pretreatment is completed
Afterwards, two pieces of stainless sheet steel welding end surfaces to be welded are parallel, impulse- free robustness.
Further, welder's part is treated along weld seam using craft MIG weldering (welding) in step (b)
Carry out spot welding, spot welding current (130-160) A, arc voltage (15-20.5) V, argon flow (8-10) L/min, butt-joint clearance control
System is between (0.5-1) mm.
Further, in step (c) pressing plate length L1Than the length L of weld seam2Big 5mm or so, the width D of pressing plate=
25mm, thickness δ=1mm of pressing plate.Left and right two pressure plates are 13mm or so at a distance from Weld pipe mill close to the end face of weld seam,
The clamping point of fixture is located at the geometric center of pressing plate, and clamping dynamics is moderate.On the one hand pressing plate can treat welder's part to avoid fixture
Surface damages, and the clamping power of fixture can also on the other hand uniformly expanded in workpiece surface to be welded and opens, and effectively inhibits weldering
Connect deformation.
Further, the quantity in cooling-water duct and protection gas channel is respectively at least two and at least one in step (d).
The inlet opening and apopore for penetrating through welding bench both ends form cooling-water duct, the air inlet at welding bench forming tank both ends
Hole and venthole form protection gas channel.
Further, the radius R=5mm of cooling-water duct, the length of cooling-water duct is than fusion length L2Big 10mm is left
The right side, cooling water flow are (6-8) L/min.
Further, the welding procedure used in step (d) is CMT mix (i.e. CMT+PMC).
Further, welding wire model φ 1.2 in step (d), wire feed rate are (5.7-6.7) m/min, and speed of welding is
(390-460) mm/min, PMC mix high current time complexity curve -2 ± 2, arc length correction factor are 2%-4%, low energy period 5-
10, low energy time (1-4) ms.Front protecting gas becomes 96%Ar+4%CO according to the group of volume percentage2, flow
For 20-24L/min；Backing gas is pure Ar, flow 1.5-2.5L/min.
1. welding procedure provided by the invention has the following characteristics that using back side water cooling, reduce to the greatest extent to be welded
The welding deformation of workpiece；2. combining the welding advantage that CMT weldering welding deformation is small and PMC weldering fusion penetration is stable；3. being based on CMT mix
Welding procedure ensures weld seam single welding once two-sided free forming, greatly improves welding efficiency；4. accurate heat input
Welding heat affected zone is reduced, spatter is reduced, improves weldquality.In addition to this, the method for the present invention also have with
It is lower that easy to operate, labor intensity is low, weld seam welding uses robot welding the utility model has the advantages that welding preparation uses manual type, from
Dynamicization degree is high；On the basis of tradition only has back-protective, weld cycle water cooling is increased, so that welding deformation is smaller.
Detailed description of the invention
Fig. 1 is present invention welding clamping schematic diagram；
Fig. 2 is the photo in kind after welding under the conditions of illogical cooling water in the embodiment of the present invention 1；
Fig. 3 is the photo in kind after welding under the conditions of leading to cooling water in the embodiment of the present invention 1；
Fig. 4 is the metallographic of welding heat affected zone near weld-fusion line under the conditions of not leading to cooling water in the embodiment of the present invention 1
Organization chart (× 50)；
Fig. 5 is the metallographic group of welding heat affected zone near weld-fusion line under the conditions of leading to cooling water in the embodiment of the present invention 1
Knit figure (× 50).
Wherein, 1, welding bench, 2, back bracket, 3, air inlet, 4, water inlet, 5, water outlet, 6, venthole, 7, fixture,
8, V-type free forming slot, 9, pressing plate, 10, workpiece to be welded.
Specific embodiment
To make those of ordinary skill in the art fully understand technical solution of the present invention and beneficial effect, below in conjunction with specific
Embodiment is further described.
Embodiment 1
Workpiece to be welded is two piece of 304 stainless steel, mother metal thickness 3mm, single face welding and double face free forming welding procedure tool
Body is as follows:
Step 1: the facing cut to be welded of workpiece to be welded is put down with CNC milling machine, it is ensured that end face is parallel, is then blown away and is added with air gun
The burr in work face, then dip proper amount of acetone solvent with cotton balls and wiped, the to remove impurity around weld seam within the scope of 15mm
And greasy dirt.
Step 2: treating welder's part using craft MIG weldering carries out spot welding, spot welding current 140A, arc voltage 18V, argon gas
Flow 8L/min, butt-joint clearance 0.5mm.
Step 3: workpiece to be welded is placed on welding bench, then put appropriate size on workpiece after the completion of spot welding
Pressing plate (long 155mm wide 25mm thickness 1mm), two pressure plates are 13mm at a distance from Weld pipe mill close to the end face of weld seam.With
Soldering cramping apparatus fixes pressing plate, and clamping point is located at the geometric center of pressing plate, and clamping dynamics is moderate.
Step 4: using(ER308L, similarly hereinafter) welding wire is based on CMT mix (CMT+PMC) welding procedure and treats welder
Part is welded.Wire feed rate 5.7m/min, speed of welding 430mm/min, PMC mix high current time complexity curve -4, arc length are repaired
Positive coefficient 2%, low energy period 10, low energy time 3ms, front protecting gas composition are 96%Ar+4%CO2(volume point
Number), flow 22L/min, backing gas (pure Ar) flow be 1.5L/min, the radius R=5mm of circulating water channel,
The length L of circulating water channel3=154mm.Pass through the flow velocity (V of two groups of recirculated water0=0L/min and V1=6L/min, i.e., without circulation
The recirculated water of water and 6L/min), research appearance of weld rule.
Embodiment 2
Workpiece to be welded is two piece of 304 stainless steel, mother metal thickness 5mm, single face welding and double face free forming welding procedure tool
Body is as follows:
Step 1: the facing cut to be welded of workpiece to be welded is put down with CNC milling machine, it is ensured that end face is parallel, is then blown away and is added with air gun
The burr in work face, then dip proper amount of acetone solvent with cotton balls and wiped, the to remove impurity and oil around weld seam in 15mm
It is dirty.
Step 2: treating welder's part using craft MIG weldering carries out spot welding, spot welding current 157A, arc voltage 20.1V, argon
Throughput 10L/min, butt-joint clearance 1mm.
Step 3: workpiece to be welded is placed on welding bench, then place appropriate size on workpiece after the completion of spot welding
Pressing plate (long 155mm wide 25mm thickness 1mm), two pressure plates are 13mm at a distance from Weld pipe mill close to the end face of weld seam.With
Soldering cramping apparatus fixes pressing plate, and clamping point is located at the geometric center of pressing plate, and clamping dynamics is moderate.
Step 4: usingWelding wire is treated welder's part based on CMT mix (CMT+PMC) welding procedure and is welded.It send
Silk speed 6.7m/min, speed of welding 400mm/min, PMC mix high current time complexity curve -1, arc length correction factor 4%, low energy
It measures the period 5, low energy time 2ms, front protecting gas composition is 96%Ar+4%CO2(volume fraction), flow 24L/
Min, backing gas (pure Ar) flow are 2.5L/min, the radius R=5mm of circulating water channel, the length of circulating water channel
L3=154mm.Pass through the flow velocity (V of two groups of recirculated water0=0L/min and V1=8L/min, the i.e. circulation without recirculated water and 8L/min
Water), research appearance of weld rule.
The specific welding condition of Examples 1 and 2 is as shown in table 1.
Each embodiment soldering test parameter list of table 1
The welding gained workpiece material object photo difference of embodiment 1 is as Figure 2-3, and wherein Fig. 2 welds Shi Weitong cooling water, figure
Logical cooling water when 3 welding.Appearance of weld is good under the conditions of two kinds as seen from the figure, and appearance of weld is although good when logical cooling water
It is good, but back oxidation sector width is bigger, appearance jaundice even reddens, and welding deformation is bigger.
Embodiment 1 welds the metallographic structure figure (× 50) of gained workpiece commissure as illustrated in figures 4-5, when wherein Fig. 4 is welded
Do not lead to cooling water, logical cooling water when Fig. 5 is welded.Weld seam fuses under the conditions of two kinds as seen from the figure, and weld seam is tiny isometric
Crystalline substance, heat affected area are stratiform ferritic structure, but the heat affected area stratiform ferritic structure crystal grain more overstriking of illogical cooling water
Greatly, the dispersion of distribution is wider.
Workpiece property of welded joint parameter obtained by embodiment 1-2 is as shown in table 2.
Each embodiment property of welded joint table of table 2
Claims (9)
1. a kind of 3-5mm stainless steel plate single face welding and double face free forming welding method, it is characterised in that this method includes following step
It is rapid:
(a) welder's part is treated to pre-process；
(b) spot welding is carried out to weld seam；
(c) workpiece to be welded is fixed on welding bench by pressing plate and fixture, weld seam is made to be located at the molding of welding bench
Above slot；
(d) cooling water and protection gas are delivered to inside welding bench respectively by cooling-water duct and protection gas channel, so
After treat welder's part and weld.
2. the method as described in claim 1, it is characterised in that: step (a) pretreatment includes treating the to be welded of welder's part
End face carries out flat milling, high pressure gas purging, organic solvent cleaning wiping etc..
3. the method as described in claim 1, it is characterised in that: treat welder's part along weld seam using craft MIG weldering in step (b)
Carry out spot welding, spot welding current (130-160) A, arc voltage (15-20.5) V, argon flow (8-10) L/min, butt-joint clearance control
System is between (0.5-1) mm.
4. the method as described in claim 1, it is characterised in that: the length L of pressing plate in step (c)1Than the length L of weld seam2Greatly
5mm or so, width D=25mm of pressing plate, thickness δ=1mm of pressing plate, left and right two pressure plates are in the end face and weld seam of weld seam
The distance of the heart is 13mm, and the clamping point of fixture is located at the geometric center of pressing plate, and clamping dynamics is moderate.
5. the method as described in claim 1, it is characterised in that: the quantity of cooling-water duct and protection gas channel in step (d)
Respectively at least two and at least one, the inlet opening and apopore for penetrating through welding bench both ends form cooling-water duct, weld
The air inlet and venthole for connecing workbench forming tank both ends form protection gas channel.
6. method as claimed in claim 1 or 5, it is characterised in that: the radius R=5mm of cooling-water duct, cooling-water duct
Length is than fusion length L2Big 10mm or so, cooling water flow are (6-8) L/min.
7. the method as described in claim 1, it is characterised in that: the welding procedure used in step (d) is CMT mix.
8. the method as described in claim 1, it is characterised in that: welding wire model φ 1.2, wire feed rate are in step (d)
(5.7-6.7) m/min, speed of welding are (390-460) mm/min, PMC mix high current time complexity curve -2 ± 2, arc length amendment
Coefficient is 2%-4%, low energy period 5-10, low energy time (1-4) ms；Front protecting gas is according to volume percentage
Group becomes 96%Ar+4%CO2, flow 20-24L/min；Backing gas is pure Ar, flow 1.5-2.5L/
min。
9. the method as described in claim 1, it is characterised in that: the forming tank is V-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126603.9A CN109848525B (en) | 2019-02-20 | 2019-02-20 | Single-side welding and double-side free forming welding method for 3-5mm stainless steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126603.9A CN109848525B (en) | 2019-02-20 | 2019-02-20 | Single-side welding and double-side free forming welding method for 3-5mm stainless steel plate |
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| CN109848525A true CN109848525A (en) | 2019-06-07 |
| CN109848525B CN109848525B (en) | 2020-11-17 |
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| CN110340491A (en) * | 2019-07-26 | 2019-10-18 | 电王精密电器(北京)有限公司 | A kind of welding control method, apparatus and system |
| CN114682880A (en) * | 2020-12-26 | 2022-07-01 | 玛斯特轻量化科技(天津)有限公司 | Energy absorption box welding process method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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