CN103286444A - Laser butt welding method of silicon steel sheet - Google Patents
Laser butt welding method of silicon steel sheet Download PDFInfo
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- CN103286444A CN103286444A CN2012100411033A CN201210041103A CN103286444A CN 103286444 A CN103286444 A CN 103286444A CN 2012100411033 A CN2012100411033 A CN 2012100411033A CN 201210041103 A CN201210041103 A CN 201210041103A CN 103286444 A CN103286444 A CN 103286444A
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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 the 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 low silicon-iron soft magnetic alloy of carbon electrode that contains, general silicon content is 0.5～4.5%.Adding silicon can improve resistivity and the maximum permeability of iron, reduces coercivity, core loss (iron loss) and magnetic aging.Be mainly used to make the iron core of range 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 bigger, and the silicon steel sheet of selecting for use should be thinner, and general thickness is less than 0.5mm now, even can reach 0.1mm.The world large-scale iron and steel production firm is with the form shipment of silicon steel sheet with the roll coil of strip, and the silicon steel sheet roll coil of strip of producing can be because the fracture site difference the inconsistent situation of length occurs and becomes the volume that looses, because curtailment, cannot whole shipment, improved the cost of iron and steel, in order to make the length unanimity of the roll coil of strip, production firm needs badly and the short roll coil of strip will be welded polishing.Therefore close for welding quality and the mother metal that guarantees weld seam, necessarily require the surface-brightening of weld seam, do not have pore, burn-through and thermal deformation can not occur, 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 carrying out the butt welding of silicon steel sheet.Laser weld has that the weldering spot is little, and the heat affected area is little, the weldquality height, low cost and other advantages, thus silicon steel sheet to use laser to weld be only choosing.
Yet silicon steel sheet carries out laser weld also can or the phenomenon that the misalignment phenomenon has produced burn-through take place because of excesssive gap, therefore designs a sleeve clamp with the gap value between the control silicon steel sheet and to keep concordant between two plates be very necessary.
Summary of the invention
The problem that occurs during at the demand of silicon steel sheet welding and welding, the invention provides the method for a kind of silicon steel sheet laser butt welding, this method has used silicon steel sheet that thereby welding fixture has been obtained high-quality weld seam by optimized parameters and in welding, weld seam light pore-free, the 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, satisfies the demand of producing.
Technical scheme of the present invention is as follows:
The silicon steel sheet that the method for a kind of silicon steel sheet laser butt welding, this method at first will need to weld is clamped on the silicon steel sheet weld jig, adopts laser that silicon steel sheet is carried out butt welding then under protective 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 of top board and lower face, and groove is set on the lower face, 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 the 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 is disposed the groove position in lower face, then the top board spiral shell is tied on lower face; The gap is 0.03～0.1 times of thickness of slab between the silicon steel sheet, and unfitness of butt joint is less than 0.05 times thickness of slab; Described thickness of slab is the thickness of silicon steel sheet;
(2) workpiece welding: use lathe or robot arm to hold laser welding system and weld; guarantee that the laser facula center is in the midline of silicon steel sheet solder joint; laser facula edge and silicon steel sheet solder side overlap joint; protective gas nozzle distance silicon steel sheet surface 20～30mm, the protective gas nozzle is positioned at the place ahead 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 the laser weld pattern is continuous laser welding or pulse laser welding.
Described silicon steel sheet weld jig lower face is that the stainless steel of 15～30mm is made by thickness, and the groove width of described groove is 1～5mm, and groove depth is 4～10mm; The spacing of two top boards is 10～50mm.
Step (1) is carried out preliminary treatment to silicon steel sheet to be welded before: with the 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 can't this reality of butt welding, and breakthrough progress has been arranged.By to the welding condition advantage, thereby use the gap value between the silicon steel sheet weld jig control silicon steel sheet simultaneously and keep concordant between two plates to obtain high-quality weld seam.
2, the present invention has fundamentally solved the connection request that iron and steel enterprise's silicon steel sheet is produced, and can realize that the diffusing row that involves in of curtailment connects, for enterprise has saved fund, for country has saved resource.
3, the inventive method has obtained high-quality weld seam, weld seam light pore-free, and the 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, satisfies the demand of producing.
4, process controllability of the present invention is good, and labour intensity is low, easily is automated production.
5, method of the present invention has epitaxy and autgmentability widely, and the expansion lifting of laser processing technology and the Welding Problems of other thin plate are all had great guidance and reference.
Description of drawings
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 invention one.
Fig. 3 is the silicon steel sheet weld seam photo of the embodiment of the invention two.
Among the figure: the 1-lower face; The 2-top board; The 3-groove; The 4-screw.
The specific embodiment
Below in conjunction with accompanying drawing and example the present invention is further described.
The present invention uses integrated welding equipments such as laser instrument, robot, laser Machining head and silicon steel sheet weld jig, by the motion of robot or Machine-Tool Control processing head and the bright dipping of laser instrument, use the silicon steel sheet weld jig that silicon steel sheet is carried out clamping, realize the seam of silicon steel sheet, guaranteed problems such as no thermal deformation.
Fig. 1 is silicon steel sheet weld jig structural representation of the present invention, and described silicon steel sheet weld jig is made of top board 2 and lower face 1, and groove 3 is set on the lower face 1, 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 top board 2 removably connects with the screw that lower face 1 is located in the described screw 4 by spiral shell.
Before silicon steel sheet carried out butt welding, at first the burr on the silicon steel sheet edge and irregular place are polished with 1000# sand paper, guarantee the smooth of edge, solder joint place, use acetone that silicon steel sheet solder side and surface are cleaned.
When carrying out butt welding, silicon steel sheet to be welded is placed on the lower face 1 of silicon steel sheet weld jig, solder joint is disposed the groove 3 in lower face, then top board 2 spiral shells is tied on lower face 1; The gap is less than 1/10 thickness of slab between the silicon steel sheet, and unfitness of butt joint is less than 0.05 times thickness of slab; During the workpiece welding, guarantee the laser facula center in the midline of silicon steel sheet solder joint, laser facula edge and silicon steel sheet solder side overlap joint, protective gas nozzle distance silicon steel sheet surface is not more than 30mm, and the protective gas nozzle is positioned at the place ahead of the laser head direction of motion.
Thickness is the silicon steel sheet of 0.3mm, is suitable for method of the present invention and processes, and obtains satisfactory welding effect.Used 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 eyeglass of plumb joint is f=150mm, and focusing lens is f=300mm, and fibre diameter is 15 μ m.
The welding parameter that adopts is: bonding power 650W, and speed of welding 6m/min has used 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.
The present embodiment welding effect has formed bright weld seam as shown in Figure 2, and deflection is less than 0.01mm, and weld width is 0.6mm, is that the enterprising line bend of roller bearing of 150mm is not ftractureed at diameter.
Thickness is the silicon steel sheet of 0.3mm, has used 500W multimode Pulse Nd-YAG laser instrument, and its peak power is 1000W, and all the other equipment are consistent with embodiment one, weld.
The welding parameter that adopts is: bonding power 230W, and speed of welding 0.9m/min uses Ar gas as protective gas, and shield gas flow rate is 25L/min, out of focus not, 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, the weld seam light, about deflection 0.01mm, weld width is 0.5mm, be that bending is not ftractureed on the roller bearing of 150mm at diameter, satisfied the demand of producing equally, for industrial production provides technologic support, the manufacturing of silicon steel sheet welding production line lays a solid foundation for future.
Claims (7)
1. the method for silicon steel sheet laser butt welding, it is characterized in that: the silicon steel sheet that this method at first will need to weld is clamped on the silicon steel sheet weld jig, adopts laser that silicon steel sheet is carried out butt welding then under protective gas;
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 of top board and lower face, on the described lower face groove is set, 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 the described screw by spiral shell removably connects.
2. method according to claim 1, it 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 is disposed the groove position in lower face, then the top board spiral shell is tied on lower face; The gap is 0.03～0.1 times of thickness of slab between the silicon steel sheet, and unfitness of butt joint is less than 0.05 times thickness of slab; Described thickness of slab is the thickness of silicon steel sheet;
(2) workpiece welding: use lathe or robot arm to hold laser welding system and weld, guarantee the laser facula center in the midline of silicon steel sheet solder joint, laser facula edge and silicon steel sheet solder side overlap joint; Protective gas nozzle distance silicon steel sheet surface 20～30mm, the protective gas nozzle is positioned at the place ahead of the laser head direction of motion.
3. method according to claim 2, it is characterized in that: described protective gas is helium or argon gas, gas flow 15～30L/min.
4. method according to claim 2, it is characterized in that: 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 the laser weld pattern is continuous laser welding or pulse laser welding.
5. method according to claim 2 is characterized in that: described silicon steel sheet weld jig lower face is that the stainless steel of 15～30mm is made by thickness, and the groove width of described groove is 1～5mm, and groove depth is 4～10mm; The spacing of two top boards is 10～50mm.
6. method according to claim 2, it is characterized in that: step (1) is carried out preliminary treatment to silicon steel sheet to be welded before: with the silicon steel sheet sand papering, then with acetone to silicon steel sheet solder side and surface clean.
7. method according to claim 2 is characterized in that: described silicon steel sheet thickness 0.05～0.5mm.
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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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551733A (en) * | 2013-10-25 | 2014-02-05 | 天津大学 | Method for decreasing welding fume of high-strength steel laser welding |
| CN103753023A (en) * | 2014-02-14 | 2014-04-30 | 苏州大学 | Welding method of hot-rolled nano reinforced steel plates |
| CN103801842A (en) * | 2014-01-17 | 2014-05-21 | 河南科技大学 | Jig special for laser welding |
| CN104785990A (en) * | 2015-04-15 | 2015-07-22 | 江西洪都航空工业集团有限责任公司 | Large sample plate butt welding template and butt welding process |
| CN106041305A (en) * | 2016-07-05 | 2016-10-26 | 北京科技大学 | Laser welding method of high silicon steel |
| CN106938384A (en) * | 2016-12-31 | 2017-07-11 | 天津滨海雷克斯激光科技发展有限公司 | Thickness is less than the welding method of 0.3mm stainless steel plate |
| 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 |
| CN107876984A (en) * | 2017-10-31 | 2018-04-06 | 中车青岛四方机车车辆股份有限公司 | Gap weldig method and device |
| 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 |
| 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 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103753023A (en) * | 2014-02-14 | 2014-04-30 | 苏州大学 | Welding method of hot-rolled nano reinforced steel plates |
| CN103753023B (en) * | 2014-02-14 | 2016-08-17 | 苏州大学 | The welding method of hot rolling nano reinforcement steel plate |
| CN104785990A (en) * | 2015-04-15 | 2015-07-22 | 江西洪都航空工业集团有限责任公司 | Large sample plate butt welding template and butt welding process |
| CN106041305A (en) * | 2016-07-05 | 2016-10-26 | 北京科技大学 | Laser welding method of high silicon steel |
| CN106938384A (en) * | 2016-12-31 | 2017-07-11 | 天津滨海雷克斯激光科技发展有限公司 | Thickness is less than the welding method of 0.3mm stainless steel plate |
| 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 |
| CN107876984A (en) * | 2017-10-31 | 2018-04-06 | 中车青岛四方机车车辆股份有限公司 | Gap weldig 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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