CN103286444B - Laser butt welding method of silicon steel sheet - Google Patents
Laser butt welding method of silicon steel sheet Download PDFInfo
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- CN103286444B CN103286444B CN201210041103.3A CN201210041103A CN103286444B CN 103286444 B CN103286444 B CN 103286444B CN 201210041103 A CN201210041103 A CN 201210041103A CN 103286444 B CN103286444 B CN 103286444B
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Abstract
The invention discloses a laser butt welding method of a silicon steel sheet. The method comprises the steps as follows: firstly, the silicon steel sheet required to be welded is clamped on a silicon steel sheet welding fixture, and then the silicon steel sheet is subjected to butt welding with laser under protective gas, wherein the power of the laser is 200-2000 W, the welding speed is 0.5-20 m/min, and the defocusing amount is minus 20-20 mm. The silicon steel sheet welding fixture comprises upper press plates and a lower panel, a groove is formed in the lower panel, and two upper press plates are arranged on two sides of the groove respectively. According to the method, technological parameters are optimized, and the silicon steel sheet butt welding fixture is used in a welding process, so that a high-quality weld joint is obtained, the weld joint is bright and free of pores, the deformation after welding is low, excess weld metal is no larger than 10% of a plate thickness, and the silicon steel sheet can be bent on a rolling shaft with a diameter of 150 mm and meets production requirements.
Description
Technical field
The present invention relates to Materialbearbeitung mit Laserlicht technical field, be specifically related to the method for a kind of silicon steel sheet laser butt welding.
Background technology
Silicon steel sheet also claims silicon steel sheet: be a kind of silicon-iron soft magnetic alloy low containing carbon electrode, general silicon content is 0.5 ~ 4.5%.Add resistivity and maximum permeability that silicon can improve iron, reduce coercivity, core loss (iron loss) and magnetic aging.Be mainly used to the iron core making various transformer, motor and generator.World's silicon steel sheet output accounts for 1% of steel total amount.Silicon steel sheet generally improves with silicone content, and iron loss, punching and magnetic strength reduce, and hardness increases.Operating frequency is higher, and eddy-current loss is larger, and the silicon steel sheet selected should be thinner, and present general thickness is less than 0.5mm, even can reach 0.1mm.Large-scale iron and steel production firm of the world is with the form shipment of the roll coil of strip by silicon steel sheet, and the silicon steel sheet roll coil of strip produced inconsistent situation can become loose volume because length appears in fracture site difference, due to curtailment, cannot overall shipment, improve the cost of iron and steel, in order to make the length of the roll coil of strip consistent, production firm needs badly and short strip will be involved in row welding polishing.Therefore welding quality and mother metal in order to ensure weld seam are close, necessarily require the surface-brightening of weld seam, there is no pore, burn-through and thermal deformation can not be occurred, the reinforcement of postwelding can not be greater than 20% of thickness of slab, and weld seam can withstand the roller bearing flexural deformation that diameter is 150mm.Based on the analysis of above-mentioned requirements, prior welding mode is not suitable for the butt welding carrying out silicon steel sheet.Laser weld has that weldering spot is little, and heat affected area is little, and weldquality is high, low cost and other advantages, and therefore silicon steel sheet uses laser to carry out welding is only choosing.
But silicon steel sheet carries out laser weld also because of excesssive gap or can there occurs the phenomenon that misalignment phenomenon creates burn-through, therefore design a sleeve clamp with the gap value controlled between silicon steel sheet and to keep between two plates concordant be very necessary.
Summary of the invention
The produced problem when demand of welding for silicon steel sheet and welding, the invention provides the method for a kind of silicon steel sheet laser butt welding, the method is passed through the technological parameter of optimization and in welding, is employed silicon steel sheet butting joint fixture thus obtain high-quality weld seam, weld seam light pore-free, post welding distortion amount is lower, reinforcement is not more than 10% of thickness of slab, can be the enterprising line bend of roller bearing of 150mm at diameter, meets the demand of producing.
Technical scheme of the present invention is as follows:
A method for silicon steel sheet laser butt welding, first the method will need the silicon steel sheet of welding to be clamped on silicon steel sheet weld jig, then adopts laser to carry out butt welding to silicon steel sheet under a shielding gas; Wherein:
The power of described laser is 200 ~ 2000W, speed of welding 0.5 ~ 20m/min, defocusing amount-20 ~ 20mm;
Described silicon steel sheet weld jig is made up of top board and lower face, and lower face arranges groove, and top board is two, is arranged at the both sides of groove respectively; Described top board and lower face correspondence position are respectively equipped with four screws, and the screw that top board and lower face are located in described screw by spiral shell removably connects.
Concrete steps are as follows:
(1) piece-holder: silicon steel sheet to be welded is placed on the lower face of silicon steel sheet weld jig, solder joint disposes the groove position in lower face, then by top board spiro on lower face; Between silicon steel sheet, gap is 0.03 ~ 0.1 times of thickness of slab, the thickness of slab that unfitness of butt joint is less than 0.05 times; The thickness of described thickness of slab and silicon steel sheet;
(2) workpiece welding: use lathe or robot arm to hold laser welding system and weld; ensure the midline of laser spot center at silicon steel sheet solder joint; laser facula edge and silicon steel sheet solder side overlap; protective gas nozzle distance silicon steel sheet surface 20 ~ 30mm, protective gas nozzle is positioned at the front of the laser head direction of motion.
Described protective gas is helium or argon gas, gas flow 15 ~ 30L/min.
The light source of described laser is by optical fiber laser, Nd-YAG laser instrument, CO
2laser instrument, disc-type laser instrument or semiconductor laser send, and laser weld pattern is continuous laser welding or pulsed laser welding.
The stainless steel that described silicon steel sheet weld jig lower face is 15 ~ 30mm by thickness is made, and the groove width of described groove is 1 ~ 5mm, and groove depth is 4 ~ 10mm; The spacing of two pieces of top boards is 10 ~ 50mm.
Pretreatment is carried out to silicon steel sheet to be welded before step (1): by silicon steel sheet sand papering, then with acetone to silicon steel sheet solder side and surface clean.
Described silicon steel sheet thickness 0.05 ~ 0.5mm.
The present invention has the following advantages:
1, the present invention is directed to domestic thin plate silicon steel sheet cannot butt welding this reality, had breakthrough progress.By to welding condition advantage, use silicon steel sheet weld jig to control the gap value between silicon steel sheet simultaneously and keep concordant between two plates thus obtain high-quality weld seam.
2, the present invention fundamentally solves the connection request that iron and steel enterprise's silicon steel sheet is produced, and the loose row that involves in that can realize curtailment connects, for enterprise has saved fund, for country saves resource.
3, the inventive method obtains high-quality weld seam, and weld seam light pore-free, post welding distortion amount is lower, and reinforcement is not more than 10% of thickness of slab, can be the enterprising line bend of roller bearing of 150mm at diameter, meets the demand of producing.
4, present invention process controllability is good, and labour intensity is low, easily is automated production.
5, method of the present invention has epitaxy and autgmentability widely, all has instruct greatly and reference the expansion lifting of laser processing technology and the Welding Problems of other thin plate.
Accompanying drawing explanation
Fig. 1 is silicon steel sheet weld jig structural representation of the present invention.
Fig. 2 is the silicon steel sheet weld seam photo of the embodiment of the present invention one.
Fig. 3 is the silicon steel sheet weld seam photo of the embodiment of the present invention two.
In figure: 1-lower face; 2-top board; 3-groove; 4-screw.
Detailed description of the invention
Below in conjunction with accompanying drawing and example, the present invention is further described.
The present invention uses the integrated welding equipments such as laser instrument, robot, laser Machining head and silicon steel sheet weld jig, by robot or the motion of Machine-Tool Control processing head and the bright dipping of laser instrument, silicon steel sheet weld jig is used to be clamped by silicon steel sheet, achieve the seam of silicon steel sheet, ensure that without problems such as thermal deformations.
Fig. 1 is silicon steel sheet weld jig structural representation of the present invention, and described silicon steel sheet weld jig is made up of top board 2 and lower face 1, lower face 1 is arranged groove 3, and top board 2 is two, is arranged at the both sides of groove 3 respectively; Described top board 2 is respectively equipped with four screws 4 with lower face 1 correspondence position, and the screw that top board 2 and lower face 1 are located in described screw 4 by spiral shell removably connects.
Before butt welding is carried out to silicon steel sheet, first the burr on silicon steel sheet edge and irregular place 1000# sand paper are polished, ensure the smooth of edge, solder joint place, use acetone to clean silicon steel sheet solder side and surface.
When carrying out butt welding, be placed on by silicon steel sheet to be welded on the lower face 1 of silicon steel sheet weld jig, solder joint disposes the groove 3 in lower face, then by top board 2 spiro on lower face 1; Between silicon steel sheet, gap is less than 1/10 thickness of slab, the thickness of slab that unfitness of butt joint is less than 0.05 times; During workpiece welding, ensure the midline of laser spot center at silicon steel sheet solder joint, laser facula edge and silicon steel sheet solder side overlap, and protective gas nozzle distance silicon steel sheet surface is not more than 30mm, and protective gas nozzle is positioned at the front of the laser head direction of motion.
Embodiment 1
Thickness is the silicon steel sheet of 0.3mm, is suitable for method of the present invention and processes, obtain satisfactory welding effect.Employ 1000W single mode jointed fiber laser instrument in the present embodiment, welding processing is carried out in robot welding processing platform and laser welding system, and the collimation lens of plumb joint is f=150mm, and focusing lens is f=300mm, and fibre diameter is 15 μm.
The welding parameter adopted is: bonding power 650W, speed of welding 6m/min, employ He gas as protective gas, and shield gas flow rate is 25L/min, and defocusing amount is-12mm, protective gas nozzle distance surface of the work 10mm.Gap between two silicon steel sheets and unfitness of butt joint are all less than 0.01mm.
As shown in Figure 2, define the weld seam of light, deflection is less than 0.01mm to the present embodiment welding effect, and weld width is 0.6mm, and the enterprising line bend of roller bearing being 150mm at diameter is not ftractureed.
Embodiment 2
Thickness is the silicon steel sheet of 0.3mm, employs 500W multimode Pulse Nd-YAG laser, and its peak power is 1000W, and all the other equipment are consistent with embodiment one, weld.
The welding parameter adopted is: bonding power 230W, speed of welding 0.9m/min, and use Ar gas as protective gas, shield gas flow rate is 25L/min, non-out of focus, protective gas nozzle distance surface of the work 15mm.Gap between two silicon steel sheets is less than 0.02mm, and unfitness of butt joint is less than 0.01mm.
The present embodiment welding effect as shown in Figure 3, weld seam light, deflection about 0.01mm, weld width is 0.5mm, at diameter be 150mm roller bearing on bending not ftracture, meet the demand of production equally, for industrial production provides technologic support, for future, the manufacture of silicon steel sheet welding production line lays a solid foundation.
Claims (5)
1. the method for silicon steel sheet laser butt welding, it is characterized in that: first the silicon steel sheet that needs weld is clamped on silicon steel sheet weld jig by the method, then laser is adopted to carry out butt welding to silicon steel sheet, described silicon steel sheet thickness 0.05 ~ 0.5mm under a shielding gas; Described silicon steel sheet weld jig is made up of top board and lower face, and described lower face arranges groove, and top board is two, is arranged at the both sides of groove respectively; Described top board and lower face correspondence position are respectively equipped with four screws, and the screw that top board and lower face are located in described screw by spiral shell removably connects; The light source of described laser is by optical fiber laser, Nd-YAG laser instrument, CO
2laser instrument, disc-type laser instrument or semiconductor laser send, and laser weld pattern is continuous laser welding or pulsed laser welding; When adopting 1000W single mode jointed fiber laser instrument, the welding parameter of employing is: bonding power 650W, speed of welding 6m/min, and use He gas as protective gas, defocusing amount is-12mm; When employing 500W multimode Pulse Nd-YAG laser, its peak power is 1000W, and the welding parameter of employing is: bonding power 230W, speed of welding 0.9m/min, uses Ar gas as protective gas, non-out of focus.
2. method according to claim 1, is characterized in that: concrete steps are as follows:
(1) piece-holder: silicon steel sheet to be welded is placed on the lower face of silicon steel sheet weld jig, solder joint disposes the groove position in lower face, then by top board spiro on lower face; Between silicon steel sheet, gap is 0.03 ~ 0.1 times of thickness of slab, the thickness of slab that unfitness of butt joint is less than 0.05 times; The thickness of described thickness of slab and silicon steel sheet;
(2) workpiece welding: use lathe or robot arm to hold laser welding system and weld, ensure the midline of laser spot center at silicon steel sheet solder joint, laser facula edge and silicon steel sheet solder side overlap; Protective gas nozzle distance silicon steel sheet surface 20 ~ 30mm, protective gas nozzle is positioned at the front of the laser head direction of motion.
3. method according to claim 2, is characterized in that: described shield gas flow rate 15 ~ 30L/min.
4. method according to claim 2, is characterized in that: the stainless steel that described silicon steel sheet weld jig lower face is 15 ~ 30mm by thickness is made, and the groove width of described groove is 1 ~ 5mm, and groove depth is 4 ~ 10mm; The spacing of two pieces of top boards is 10 ~ 50mm.
5. method according to claim 2, is characterized in that: carry out pretreatment to silicon steel sheet to be welded before step (1): by silicon steel sheet sand papering, then with acetone to silicon steel sheet solder side and surface clean.
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| CN201210041103.3A CN103286444B (en) | 2012-02-22 | 2012-02-22 | Laser butt welding method of silicon steel sheet |
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| CN201210041103.3A CN103286444B (en) | 2012-02-22 | 2012-02-22 | Laser butt welding method of silicon steel sheet |
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| CN103286444B true CN103286444B (en) | 2015-06-17 |
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| CN103551733A (en) * | 2013-10-25 | 2014-02-05 | 天津大学 | Method for decreasing welding fume of high-strength steel laser welding |
| CN103801842A (en) * | 2014-01-17 | 2014-05-21 | 河南科技大学 | Jig special for laser welding |
| CN103753023B (en) * | 2014-02-14 | 2016-08-17 | 苏州大学 | The welding method of hot rolling nano reinforcement steel plate |
| CN104785990B (en) * | 2015-04-15 | 2016-09-21 | 江西洪都航空工业集团有限责任公司 | A kind of large-scale model butt welding template and flat welding process |
| CN106041305B (en) * | 2016-07-05 | 2017-12-08 | 北京科技大学 | A kind of high silicon steel method for laser welding |
| CN106938384B (en) * | 2016-12-31 | 2020-07-14 | 天津滨海雷克斯激光科技发展有限公司 | Welding method of stainless steel plate with thickness less than 0.3mm |
| CN107378240A (en) * | 2017-07-20 | 2017-11-24 | 中山汉通激光设备有限公司 | A kind of galvanometer laser stitch welding technique |
| CN107876984B (en) * | 2017-10-31 | 2020-04-14 | 中车青岛四方机车车辆股份有限公司 | Gap welding method and device |
| CN110936103A (en) * | 2018-09-21 | 2020-03-31 | 宝山钢铁股份有限公司 | Laser welding method and application of high-silicon steel hot rolled plate |
| CN110560900A (en) * | 2019-09-12 | 2019-12-13 | 武汉宝悍焊接设备有限公司 | Laser butt-splicing welding high-strength silicon steel wire filling process method |
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