CN109396644A - Eliminate the method that Laser Welding receives arc crater - Google Patents
Eliminate the method that Laser Welding receives arc crater Download PDFInfo
- Publication number
- CN109396644A CN109396644A CN201811422288.6A CN201811422288A CN109396644A CN 109396644 A CN109396644 A CN 109396644A CN 201811422288 A CN201811422288 A CN 201811422288A CN 109396644 A CN109396644 A CN 109396644A
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- laser
- weld seam
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- laser welding
- arc crater
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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Abstract
The present invention provides a kind of methods that elimination Laser Welding receives arc crater to reduce impact of the laser to molten bath, eliminate Laser Welding and receive arc crater, improve arcing position appearance of weld by the way of receiving arc end laser power segmentation decaying, movement velocity is kept.This method has the characteristics that easy to operate, applied widely, using effect is good, can be directly used for the laser welding production of product parts, without increasing additional process.The present invention can solve Laser Welding and receive the problems such as arc crater position face of weld is of poor quality, strength of joint is low, there are crack defects.
Description
Technical field
The present invention relates to a kind of methods that elimination Laser Welding receives arc crater
Background technique
Laser welding has energy density high as a kind of accurate, efficient high energy beam welding method, and heat input is low, weldering
The advantages that deformation is small, speed of welding is fast is connect, the concern of people is increasingly subject to.The application of laser welding is also with laser welding technology
Development and increasingly extensively, have been directed to aerospace, weapon manufacture, shipbuilding, auto industry, pressure vessel, civilian at present
And the various fields such as medical.
But in laser welding, under the keyhole effect especially in Laser Deep Penetration Welding, weld seam arcing position meeting
Form big and deep receipts arc crater.The presence for receiving arc crater can bring following adverse effect: (1) it is unsatisfactory for face of weld quality requirement,
(2) weaken the intensity of entire connector, (3) receive the defects of arc crater induces crackle.Therefore, laser welding is being used for actual product
When production, need to eliminate using method appropriate to arc crater is received.Common method is that arc plate is received in addition, after the completion of welding
The position removal for receiving arc crater will be present.But can not add because welding line structure feature limits in many cases, and receive arc plate,
Laser Welding reception arc crater is eliminated with regard to needing to be considered as new method at this time.
Summary of the invention
The purpose of the present invention is to provide a kind of methods that elimination Laser Welding receives arc crater.
To solve the above problems, the present invention provides a kind of method that elimination Laser Welding receives arc crater, comprising:
It is swept to weld seam arcing position in laser beam, laser power is segmented decaying by the power curve of setting, wherein power declines
Subtract curve and be divided into 2-4 sections, power attenuation speed improves paragraph by paragraph.
Further, in the above-mentioned methods, laser power is segmented in decaying by the power curve of setting,
After laser power is reduced to 0W, laser head is still advanced forward by the movement velocity continuation of setting, movement velocity 0.5-
5m/min。
Further, in the above-mentioned methods, laser power is segmented in decaying by the power curve of setting,
With the reduction of energy input during power attenuation, the penetration capacity of laser weakens, impact of the laser to molten bath
Weaken, while pool width and depth reduce, forms one section of fusion penetration and the gradually smaller weld seam of molten wide, the section in weld seam end
The pattern of weld seam is accurately controlled by laser power, movement velocity, the factor of die-away time.
Further, in the above-mentioned methods, it is formed in one section of fusion penetration and the gradually smaller weld seam of molten wide in weld seam end,
For the laser welding of head and the tail closed weld, is welded from the beginning to the end using one of continuous laser beam, work as laser
After beam is swept to weld seam or arcing position, laser power starts to be reduced to 0W by the power curve segmentation decaying of setting, laser power
Afterwards, laser head is still advanced forward by the movement velocity continuation of setting, is being risen or arcing position forms fusion penetration and molten wide and gradually becomes
Small weld seam.
Further, in the above-mentioned methods, it is formed in one section of fusion penetration and the gradually smaller weld seam of molten wide in weld seam end,
For the laser welding of non-close weld seam, laser beam is divided to two sections to be welded from weld seam both ends to centre, at middle part
Connecting position laser power starts the power curve segmentation decaying by setting, and after laser power is reduced to 0W, laser head still presses setting
Movement velocity continuation advance forward, form fusion penetration and molten wide in the middle part of weld seam and gradually become smaller weld seam.
Compared with prior art, the invention has the characteristics that:
One, the present invention is a kind of by using the mode for receiving arc end laser power segmentation decaying, movement velocity is kept, and is subtracted
The method that Laser Welding receives arc crater is eliminated in impact of the small laser to molten bath.
Two, the pattern that arc weld is received in this method can accurately be controlled by factors such as laser power, movement velocity, die-away times
System.
Three, this method is easy to operate, can be directly used for the laser welding production of product parts, without increasing additional processing
Device and process.Four, this method is applied widely, is suitable for most metal materials, can be used for head and the tail closed weld
Laser welding, it can also be used to the laser welding of non-close weld seam.Five, this method using effect is good, can eliminate laser welding
Receive arc crater, avoid because receive arc crater there are due to bring such as strength of joint reduce, receive crater crack the problems such as, guarantee receive arc position
Set stability of the welding quality.
Detailed description of the invention
Fig. 1 is the schematic diagram that the elimination Laser Welding of the head and the tail closed weld of one embodiment of the invention receives the method for arc crater；
Fig. 2 is the method that the elimination Laser Welding of the non-close seam laser welding of one embodiment of the invention receives arc crater
Schematic diagram.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1, the present invention provides a kind of method that elimination Laser Welding receives arc crater, comprising:
It is swept to weld seam arcing position in laser beam, laser power is segmented decaying by the power curve of setting, wherein power declines
Subtract curve and be divided into 2-4 sections, power attenuation speed improves paragraph by paragraph.
Here, reducing laser to molten bath by the way of receiving arc end laser power segmentation decaying, movement velocity is kept
Impact eliminates Laser Welding and receives arc crater, improves arcing position appearance of weld.This method have it is easy to operate, applied widely, make
The features such as good with effect, can be directly used for the laser welding production of product parts, without increasing additional process.The present invention
It can solve Laser Welding and receive the problems such as arc crater position face of weld is of poor quality, strength of joint is low, there are crack defects.
Elimination Laser Welding of the invention receives in one embodiment of method of arc crater, and laser power is divided by the power curve of setting
In section decaying,
After laser power is reduced to 0W, laser head is still advanced forward by the movement velocity continuation of setting, movement velocity 0.5-
5m/min。
Elimination Laser Welding of the invention receives in one embodiment of method of arc crater, and laser power is divided by the power curve of setting
In section decaying,
With the reduction of energy input during power attenuation, the penetration capacity of laser weakens, impact of the laser to molten bath
Weaken, while pool width and depth reduce, forms one section of fusion penetration and the gradually smaller weld seam of molten wide, the section in weld seam end
The pattern of weld seam is accurately controlled by factors such as laser power, movement velocity, die-away times, receives arc to reach and eliminate Laser Welding
The effect in hole.
Elimination Laser Welding of the invention receives in one embodiment of method of arc crater, forms one section of fusion penetration in weld seam end and melts
In wide gradually smaller weld seam,
For the laser welding of head and the tail closed weld, is welded from the beginning to the end using one of continuous laser beam, work as laser
After beam is swept to weld seam (receipts) arc position, laser power starts to be reduced to 0W by the power curve segmentation decaying of setting, laser power
Afterwards, laser head is still advanced forward by the movement velocity continuation of setting, forms fusion penetration in (receipts) arc position and molten wide gradually becomes
Small weld seam eliminates Laser Welding and receives arc crater.
Elimination Laser Welding of the invention receives in one embodiment of method of arc crater, forms one section of fusion penetration in weld seam end and melts
In wide gradually smaller weld seam,
For the laser welding of non-close weld seam, laser beam is divided to two sections to be welded from weld seam both ends to centre, at middle part
Connecting position laser power starts the power curve segmentation decaying by setting, and after laser power is reduced to 0W, laser head still presses setting
Movement velocity continuation advance forward, form fusion penetration and molten wide in the middle part of weld seam and gradually become smaller weld seam, Laser Welding can be eliminated
Arc crater is received, and the fusion penetration that can prevent laser power decaying from causing middle part weld seam loses.
It is as illustrated in fig. 1 and 2 to eliminate welding receipts arc crater method.
Laser welding head and the tail closed weld, base material are 2mm thickness titanium alloy, circular seam welding, initial laser power P=1.5-
1.8kW is welded using the method for receiving arc end laser power segmentation decaying, movement velocity is kept, the specific steps are as follows:
Step 1: workpiece is subjected to pickling, clamping, solid point.
Step 2: being welded from the beginning to the end using one of continuous laser beam, plays (receipts) arc position when laser beam is swept to weld seam
It postpones, laser power starts to divide 2 sections of decaying by the power curve of setting, laser power P1=0.8-1.0kW, P2=0kW, decaying
Time t1=0.5-0.7s, t2=0.8-1.0s, after laser power is reduced to 0W, laser head still presses movement velocity 1.0-1.5m/min
Continuation is advanced forward, and entire welding process is completed.
Laser welding non-close weld seam, base material are 5mm thickness stainless steel, butt plates welding, initial laser power P=2.5-
3.0kW is welded using the method for receiving arc end laser power segmentation decaying, movement velocity is kept, the specific steps are as follows:
Step 1: workpiece is cleaned, clamping, solid point.
Step 2: being welded from workpiece one end to middle part, starts the function by setting in workpiece medium position laser power
2 sections of decaying of rate curve point, laser power P3=1.8-2.0kW, P4=0kW, die-away time t3=0.3-0.5s, t4=0.6-
0.8s, after laser power is reduced to 0W, laser head is still advanced forward by movement velocity 0.8-1.2m/min continuation, completes first segment weldering
It connects.
Step 3: being welded from the workpiece other end to middle part, and connecting position laser power starts by setting in the middle part of workpiece
2 sections of decaying of fixed power curve point, laser power P5=1.8-2.0kW, P6=0kW, die-away time t5=0.3-0.5s, t6=
0.6-0.8s, after laser power is reduced to 0W, laser head is still advanced forward by movement velocity 0.8-1.2m/min continuation, completes second
Section welding.
The method that arc crater is received using elimination Laser Welding shown in Fig. 1~2, appearance of weld.In conventional laser welding process,
Under keyhole effect especially in Laser Deep Penetration Welding, laser is very big to the impact in molten bath, in weld seam arcing position meeting shape
At big and deep receipts arc crater.
Using the method for receiving arc end laser power segmentation decaying, movement velocity is kept, to head and the tail closing and non-close two
The weld seam of kind form carries out laser welding, and with the decaying of laser power, the penetration capacity of laser weakens, and laser rushes molten bath
Reduction is hit, so that pool width and depth reduce, forms one section of fusion penetration and the gradually smaller weld seam of molten wide, weldering in weld seam end
Seam surface is without recess.Obtain eliminate Laser Welding receive arc crater remarkable result, avoid because receive arc crater there are due to bring
Strength of joint reduces, receives the problems such as crater crack, to ensure that the welding quality of entire weld seam.
The invention has the characteristics that:
One, the present invention is a kind of by using the mode for receiving arc end laser power segmentation decaying, movement velocity is kept, and is subtracted
The method that Laser Welding receives arc crater is eliminated in impact of the small laser to molten bath.
Two, the pattern that arc weld is received in this method can accurately be controlled by factors such as laser power, movement velocity, die-away times
System.
Three, this method is easy to operate, can be directly used for the laser welding production of product parts, without increasing additional processing
Device and process.Four, this method is applied widely, is suitable for most metal materials, can be used for head and the tail closed weld
Laser welding, it can also be used to the laser welding of non-close weld seam.Five, this method using effect is good, can eliminate laser welding
Receive arc crater, avoid because receive arc crater there are due to bring such as strength of joint reduce, receive crater crack the problems such as, guarantee receive arc position
Set stability of the welding quality.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (5)
1. a kind of method eliminated Laser Welding and receive arc crater characterized by comprising
It is swept to weld seam arcing position in laser beam, laser power is segmented decaying by the power curve of setting, wherein power attenuation is bent
Line is divided into 2-4 sections, and power attenuation speed improves paragraph by paragraph.
2. eliminating the method that Laser Welding receives arc crater as described in claim 1, which is characterized in that laser power is by the function set
In the decaying of rate curve segmentation,
After laser power is reduced to 0W, laser head is still advanced forward by the movement velocity continuation of setting, movement velocity 0.5-5m/
min。
3. eliminating the method that Laser Welding receives arc crater as described in claim 1, which is characterized in that laser power is by the function set
In the decaying of rate curve segmentation,
With the reduction of energy input during power attenuation, the penetration capacity of laser weakens, laser to the damp impacts in molten bath,
Pool width and depth reduce simultaneously, form one section of fusion penetration and the gradually smaller weld seam of molten wide, this section of weld seam in weld seam end
Pattern accurately controlled by laser power, movement velocity, the factor of die-away time.
4. eliminating the method that Laser Welding receives arc crater as described in claim 1, which is characterized in that form one section in weld seam end
In fusion penetration and the gradually smaller weld seam of molten wide,
It for the laser welding of head and the tail closed weld, is welded from the beginning to the end using one of continuous laser beam, when laser beam is swept
To weld seam or arcing position, laser power starts the power curve segmentation decaying by setting, after laser power is reduced to 0W, swashs
Shaven head is still advanced forward by the movement velocity continuation of setting, is being risen or arcing position forms fusion penetration and molten wide and gradually becomes smaller weldering
Seam.
5. eliminating the method that Laser Welding receives arc crater as described in claim 1, which is characterized in that form one section in weld seam end
In fusion penetration and the gradually smaller weld seam of molten wide,
For the laser welding of non-close weld seam, laser beam is divided to two sections to be welded from weld seam both ends to centre, connects at middle part
Position laser power starts the power curve segmentation decaying by setting, and after laser power is reduced to 0W, laser head still presses the fortune of setting
Dynamic speed continuation is advanced forward, forms fusion penetration in the middle part of weld seam and molten wide gradually becomes smaller weld seam.
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| CN201811422288.6A CN109396644A (en) | 2018-11-27 | 2018-11-27 | Eliminate the method that Laser Welding receives arc crater |
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| CN201811422288.6A CN109396644A (en) | 2018-11-27 | 2018-11-27 | Eliminate the method that Laser Welding receives arc crater |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560901A (en) * | 2019-09-11 | 2019-12-13 | 奇瑞新能源汽车股份有限公司 | laser welding equipment and welding control method thereof |
| CN111702331A (en) * | 2020-06-17 | 2020-09-25 | 新代科技(苏州)有限公司 | Laser welding power control method and control system applying same |
| CN112108767A (en) * | 2019-06-21 | 2020-12-22 | 南京航空航天大学 | Method for eliminating defects of double-laser-beam double-side synchronous welding receiving arc of aluminum alloy |
| CN112108768A (en) * | 2019-06-21 | 2020-12-22 | 南京航空航天大学 | Pulse laser conversion device and method for improving double-laser-beam double-side synchronous welding receiving arc defects |
| CN113814562A (en) * | 2021-10-13 | 2021-12-21 | 宜宾上交大新材料研究中心 | Laser welding method |
| CN114043084A (en) * | 2022-01-13 | 2022-02-15 | 江苏迅镭激光科技有限公司 | Method for laser welding of aluminum alloy cooling plate |
| CN115815798A (en) * | 2022-07-14 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Laser welding method, laser welding apparatus, and laser welding assembly |
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| CN103817403A (en) * | 2013-12-05 | 2014-05-28 | 北京航星机器制造有限公司 | Arc ending method for high-temperature alloy laser welding |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112108767A (en) * | 2019-06-21 | 2020-12-22 | 南京航空航天大学 | Method for eliminating defects of double-laser-beam double-side synchronous welding receiving arc of aluminum alloy |
| CN112108768A (en) * | 2019-06-21 | 2020-12-22 | 南京航空航天大学 | Pulse laser conversion device and method for improving double-laser-beam double-side synchronous welding receiving arc defects |
| CN112108767B (en) * | 2019-06-21 | 2022-04-01 | 南京航空航天大学 | Method for eliminating defects of double-laser-beam double-side synchronous welding receiving arc of aluminum alloy |
| CN110560901A (en) * | 2019-09-11 | 2019-12-13 | 奇瑞新能源汽车股份有限公司 | laser welding equipment and welding control method thereof |
| CN111702331A (en) * | 2020-06-17 | 2020-09-25 | 新代科技(苏州)有限公司 | Laser welding power control method and control system applying same |
| CN113814562A (en) * | 2021-10-13 | 2021-12-21 | 宜宾上交大新材料研究中心 | Laser welding method |
| CN114043084A (en) * | 2022-01-13 | 2022-02-15 | 江苏迅镭激光科技有限公司 | Method for laser welding of aluminum alloy cooling plate |
| CN114043084B (en) * | 2022-01-13 | 2022-04-19 | 江苏迅镭激光科技有限公司 | Method for laser welding of aluminum alloy cooling plate |
| CN115815798A (en) * | 2022-07-14 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Laser welding method, laser welding apparatus, and laser welding assembly |
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Application publication date: 20190301 |