CN109332897A - A kind of cut deal method for laser welding - Google Patents

A kind of cut deal method for laser welding Download PDF

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Publication number
CN109332897A
CN109332897A CN201811611672.0A CN201811611672A CN109332897A CN 109332897 A CN109332897 A CN 109332897A CN 201811611672 A CN201811611672 A CN 201811611672A CN 109332897 A CN109332897 A CN 109332897A
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CN
China
Prior art keywords
base material
welding
slag plate
laser
laser welding
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201811611672.0A
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Chinese (zh)
Inventor
戴家辉
张明军
刘子奇
张远康
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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Application filed by Changsha University of Science and Technology filed Critical Changsha University of Science and Technology
Priority to CN201811611672.0A priority Critical patent/CN109332897A/en
Publication of CN109332897A publication Critical patent/CN109332897A/en
Withdrawn legal-status Critical Current

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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
    • B23K26/24—Seam welding
    • 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
    • B23K26/60—Preliminary treatment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The technical solution of the present invention is to provide a kind of medium-thick plate method for laser welding, it is characterised in that: step 1: providing the first base material and the second base material；Step 2: mentioning slag plate for welding；Step 3: the first base material and the second base material are accurately docked；Step 4: slag plate is placed in immediately below the first base material and the second base material, and is fitted closely in the first base material and the second base material；Step 5: laser welding head focuses the high-power laser beam to be formed irradiation in the first base material and the second base material upper surface, realizes the first base material, the second base material and the welding of slag plate penetration；Step 6: slag plate is removed using machining process；Step 7: the first base material and the second base material bottom welding seam are removed using machining process.In the present invention, by the way that slag plate is arranged in the first base material and the second base material bottom, when laser welding in slag plate the big oxide adsorbent of high-melting-point surface tension coefficient in bottom weld pool surface, significantly increase the surface tension in bottom molten bath, laser weld pools stress balance has been effectively facilitated, and then has inhibited the formation collapsed in cut deal laser beam welding with the defects of root leakage.

Description

A kind of cut deal method for laser welding
Technical field
The present invention relates to a kind of welding method more particularly to a kind of cut deal method for laser welding.
Background technique
Laser welding is one of most widely used advanced technologies in laser processing technology, weldering small with thermal weld stress Seam depth-to-width ratio is big, speed is fast, seam deformation low residual stress is low, welding precision and intensity are high, fusion penetration is big, easy to automate Outstanding advantages of, it is applied in the important industry field of the national economy such as automobile, shipbuilding, nuclear power, pipeline.
In recent years, as the continuous commercialization of high-capacity optical fiber laser is promoted, laser welding cut deal increasingly causes The attention of industry.However simple laser welding cut deal downhand welding connector, it is also easy to produce the defects of collapsing with root leakage.Downhand welding connector collapses It falls into and the formation basic reason of root leakage is welding pool force unbalance.Studies have shown that bottom weld pool surface tension is to cut deal Laser welding is collapsed to play a significant role with the control of root leakage.
Filed on December 12nd, 2011, application No. is " 201110410448.7 ", entitled " large tank list The patent of invention of face welding double-faced forming method and appearance of weld liner " discloses a kind of large tank liner soldering method and lining The problem of pad, which solve large tank single-side welding double-side formings, but the technical solution still has the following problems: in order to Obtain preferable forming, it is necessary to start sufficiently large appearance of weld slot on liner, so that bottom welding seam is very wide.
Disclosed on October 3rd, 2012, Publication No. " 102019481 B of CN ", a kind of entitled " high intensity The patent of invention of the flat butt welding process of steel for ship structure " discloses a kind of flat butt weld technologies for steel method, solves High-strength steel for ship structure flat butt welding welding groove, weld preheating, welding temperature, welding sequence, welding variables, The technological specification of postwelding cold treatment, but the technical solution still has the following problems: need to open up double-V groove, production effect Rate is low, and production is difficult to temperature between strict control road in practice.
Disclosed on December 27th, 1984, Publication No. " JP59-232690A ", the hair of entitled " welding process " Bright patent discloses a kind of welding method of circular pieces, and specifically, outside uses laser welding, and weld penetration is away from test specimen following table Face 2mm, inside use TIG arc welding, and arc welding weld seam and laser welded seam overlap about 1mm.Which solve circular pieces lists The problem of bottom easily protrusion or deficient penetration are welded in face, need subsequent processing, but the technical solution still has the following problems: electricity Arc welding heat input is larger, and laser welded seam bottom can heat fusing again, generates tissue change, influences Weld Performance and production Low efficiency.
Disclosed in nineteen ninety-five August 15 days, Publication No. " JP07-214316A ", entitled " unilateral automatic welding side The patent of invention of method and device " discloses a kind of single side automatic soldering method and device, and which solve obtain weldering in real time from the back side Bottom is stitched, obtains the stabilization melt-through weld not collapsed by image procossing feedback control welding parameter, but the skill Art scheme still has the following problems: this method can only be used in plate sheet welding and traditional arc welding method, for laser welding thickness Plate collapses since the influence of bath flowing and the self weight of huge molten bath is difficult to eliminate in real time by simple technical arrangement plan Fall into defect.
Summary of the invention
The defects of present invention aim to address easily formation is collapsed with root leakage in current high power optical fibre laser welding process, The problem of appearance of weld difference.
The technical solution of the present invention is to provide a kind of medium-thick plate method for laser welding, it is characterised in that.
Step 1: the first base material and the second base material are provided.
Step 2: mentioning slag plate for welding.
Step 3: the first base material and the second base material are accurately docked.
Step 4: slag plate is placed in immediately below the first base material and the second base material, and is closely pasted in the first base material and the second base material It closes.
Step 5: laser welding head focuses the high-power laser beam to be formed and irradiates in the first base material and the second base material upper surface, Realize the first base material, the second base material and the welding of slag plate penetration.
Step 6: slag plate is removed using machining process.
Step 7: the first base material and the second base material bottom welding seam are removed using machining process.
Further, in step 1, the first base material and the second quality of parent material are identical, can be stainless steel or carbon steel.
Further, thickness is identical, is the mm of 12 mm ~ 18.
Further, in step 2, slag plate thickness is the mm of 1 mm ~ 3.
Further, slag plate ingredient is MnO, MgO, FeO and Al3O2In at least two kinds.
Further, in steps of 5, the first base material of laser beam penetration, the second base material and slag plate.
Further, in step 7, the first base material and the second base material bottom welding seam remove layer of material.
Further, the groove width d of material is removed1For the mm of 5 mm ~ 10, groove depth d2For the mm of 2 mm ~ 3.
The beneficial effects of the present invention are:
In the present invention, slag plate is set in the first base material and the second base material bottom, high-melting-point table in slag plate when laser welding The coefficient of tension big oxide adsorbent in face significantly increases the surface tension in bottom molten bath, effectively facilitates in bottom weld pool surface Laser weld pools stress balances, and then inhibit the shape collapsed during cut deal laser beam welding and the defects of root leaks At.
Detailed description of the invention
Fig. 1 is method for laser welding arrangement schematic diagram of the present invention.
Fig. 2 is Fig. 1 welding process Longitudinal cross section schematic.
Fig. 3 is the seam cross-section schematic diagram that Fig. 1 welding method obtains.
Fig. 4 is seam cross-section schematic diagram after removal slag plate.
Fig. 5 is the seam cross-section schematic diagram that the present invention finally obtains.
Wherein: 1, first base material, the 2, second base material, 3, slag plate, 4, protective gas nozzle, 5, aperture forward position wall, 6, swash Light beam, 7, weld keyhole, 8, welding pool, the 9, first weld seam, the 10, second weld seam, 11, third weld seam.
Specific embodiment
Below with reference to attached drawing 1 ~ 5, detailed description of the preferred embodiments.
In the embodiment, a kind of medium-thick plate method for laser welding includes the following steps.
Step 1: the first base material 1 and the second base material 2 being provided, are stainless steel materials, with a thickness of the mm of 12 mm ~ 18, welding Surface and oil contaminant, impurity etc. are removed with organic solvent before.
Step 2: slag plate 3 for welding is mentioned, with a thickness of the mm of 1 mm ~ 3, ingredient MnO, MgO, FeO and Al3O2In extremely It is two kinds few.
Step 3: accurately being docked the first base material 1 and the second base material 2 using special fixture.
Step 4: slag plate 3 is placed in immediately below the first base material 1 and the second base material 2, and in the first base material 1 and the second base material 2 It fits closely, is then clamped with special fixture.
Step 5: laser welding head focuses the high-power laser beam 6 to be formed and irradiates the table on the first base material 1 and the second base material 2 The first base material 1, the second base material 2 and the welding of 3 penetration of slag plate are realized in face.
As shown in Fig. 1 ~ 3, vertically irradiation is in 2 upper surface of the first base material 1 and the second base material for high-power laser beam 6, in laser Protective gas nozzle 4 is set in front of beam 6, realizes that the first base material 1, the second base material 2 and 3 penetration of slag plate are welded to connect, obtains the One weld seam 9.
In this embodiment, laser power is greater than 10 kW, and defocusing amount is -5 mm of mm ~+5, and speed of welding is 0.3 m/ min ~ 2.7 m/min。
Step 6: machining process is used, such as milling or method for milling, removes slag plate 3 in the bottom of the first weld seam 9, Obtain the second weld seam 10.
Step 7: using machining process, such as milling or method for milling, remove one layer of material in the bottom of the second weld seam 10 Material obtains third weld seam 11.
As shown in Figure 4 and Figure 5,11 bottom groove width d of third weld seam of the present invention1For the mm of 5 mm ~ 10, groove depth d2For 2 mm ~ 3 mm。
In the present embodiment, in the first base material 1 and 2 bottom of the second base material setting slag plate 3, laser welding in slag plate 3 The big oxide adsorbent of high-melting-point surface tension coefficient significantly increases the surface in bottom molten bath in 8 bottom surface of welding pool Tension has effectively facilitated laser weld pools stress balance, so inhibit collapse during cut deal laser beam welding and The formation for the defects of root leaks.
Although the present invention is disclosed in detail with reference to attached drawing, it will be appreciated that, these descriptions are only exemplary, and It is non-to be used to limit application of the invention.Protection scope of the present invention may include not departing from this by appended claims For various modifications made by invention, remodeling and equivalent scheme in the case where invention protection scope and spirit.

Claims (5)

1. a kind of medium-thick plate method for laser welding, it is characterised in that:
Step 1: the first base material and the second base material are provided；
Step 2: mentioning slag plate for welding；
Step 3: the first base material and the second base material are accurately docked；
Step 4: slag plate is placed in immediately below the first base material and the second base material, and is fitted closely in the first base material and the second base material；
Step 5: laser welding head focuses the high-power laser beam to be formed irradiation in the first base material and the second base material upper surface, realizes First base material, the second base material and the welding of slag plate penetration；
Step 6: slag plate is removed using machining process；
Step 7: the first base material and the second base material bottom welding seam are removed using machining process.
2. a kind of medium-thick plate method for laser welding according to claim 1, it is characterised in that: in step 1, the first base material Identical with the second quality of parent material, thickness is identical, with a thickness of the mm of 12 mm ~ 18.
3. a kind of medium-thick plate method for laser welding according to claim 1, it is characterised in that: in step 2, slag plate thickness Degree is the mm of 1 mm ~ 3, and slag plate ingredient is at least two kinds in MnO, MgO, FeO and Al3O2.
4. a kind of medium-thick plate method for laser welding according to claim 1, it is characterised in that: in step 5, laser beam is molten Saturating first base material, the second base material and slag plate.
5. a kind of medium-thick plate method for laser welding according to claim 1, it is characterised in that: in step 7, the first base material Layer of material is removed with the second base material bottom welding seam, the groove width d1 for removing material is the mm of 5 mm ~ 10, and groove depth d2 is 2 mm ~ 3 mm。
CN201811611672.0A 2018-12-27 2018-12-27 A kind of cut deal method for laser welding Withdrawn CN109332897A (en)

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CN201811611672.0A CN109332897A (en) 2018-12-27 2018-12-27 A kind of cut deal method for laser welding

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Application Number Priority Date Filing Date Title
CN201811611672.0A CN109332897A (en) 2018-12-27 2018-12-27 A kind of cut deal method for laser welding

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111545906A (en) * 2020-05-13 2020-08-18 南京航空航天大学 Mirror image laser welding device and method for optimizing weld joint molten pool forming
CN111604593A (en) * 2020-05-20 2020-09-01 南京航空航天大学 Laser mirror image welding method
CN113523615A (en) * 2021-08-05 2021-10-22 徐州徐工挖掘机械有限公司 Double-beam laser welding method for medium plate

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147970A (en) * 1984-12-21 1986-07-05 Furukawa Electric Co Ltd:The Production of welded pipe
JPS62101389A (en) * 1985-10-25 1987-05-11 Nippon Steel Corp Joining method for plate like body
JPH03180287A (en) * 1989-12-11 1991-08-06 Kawasaki Steel Corp Laser beam welding method
JPH07243302A (en) * 1994-03-03 1995-09-19 Hitachi Ltd Welded joint for air blower moving blade by high energy beam
CN1704378A (en) * 2004-05-27 2005-12-07 武汉天高熔接材料有限公司 Arc fusion-welding ceramic lining materials and method for making same
CN101549439A (en) * 2009-04-30 2009-10-07 象山焊接衬垫厂 Laser beam welding liner
CN106624456A (en) * 2016-11-29 2017-05-10 武汉铁锚焊接材料股份有限公司 Backing welding agent special for FCB method three-wire submerged arc welding and preparing method thereof
CN108213663A (en) * 2018-01-17 2018-06-29 兰州兰石重型装备股份有限公司 Big thickness cylinder and the complete penetraction and fusion in welding welding method taken over

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147970A (en) * 1984-12-21 1986-07-05 Furukawa Electric Co Ltd:The Production of welded pipe
JPS62101389A (en) * 1985-10-25 1987-05-11 Nippon Steel Corp Joining method for plate like body
JPH03180287A (en) * 1989-12-11 1991-08-06 Kawasaki Steel Corp Laser beam welding method
JPH07243302A (en) * 1994-03-03 1995-09-19 Hitachi Ltd Welded joint for air blower moving blade by high energy beam
CN1704378A (en) * 2004-05-27 2005-12-07 武汉天高熔接材料有限公司 Arc fusion-welding ceramic lining materials and method for making same
CN101549439A (en) * 2009-04-30 2009-10-07 象山焊接衬垫厂 Laser beam welding liner
CN106624456A (en) * 2016-11-29 2017-05-10 武汉铁锚焊接材料股份有限公司 Backing welding agent special for FCB method three-wire submerged arc welding and preparing method thereof
CN108213663A (en) * 2018-01-17 2018-06-29 兰州兰石重型装备股份有限公司 Big thickness cylinder and the complete penetraction and fusion in welding welding method taken over

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111545906A (en) * 2020-05-13 2020-08-18 南京航空航天大学 Mirror image laser welding device and method for optimizing weld joint molten pool forming
CN111545906B (en) * 2020-05-13 2022-05-20 南京航空航天大学 Mirror image laser welding device and method for optimizing weld pool forming
CN111604593A (en) * 2020-05-20 2020-09-01 南京航空航天大学 Laser mirror image welding method
CN113523615A (en) * 2021-08-05 2021-10-22 徐州徐工挖掘机械有限公司 Double-beam laser welding method for medium plate

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Application publication date: 20190215