CN102941414A - Pre-filled wire stirring friction welding method - Google Patents

Pre-filled wire stirring friction welding method Download PDF

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Publication number
CN102941414A
CN102941414A CN2012105206459A CN201210520645A CN102941414A CN 102941414 A CN102941414 A CN 102941414A CN 2012105206459 A CN2012105206459 A CN 2012105206459A CN 201210520645 A CN201210520645 A CN 201210520645A CN 102941414 A CN102941414 A CN 102941414A
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China
Prior art keywords
welding
stirring
head
silk
friction stir
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CN2012105206459A
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Chinese (zh)
Inventor
黄永宪
刘昊舒
吕世雄
万龙
刘会杰
冯吉才
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Harbin Institute of Technology
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Harbin Institute of Technology
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Priority to CN2012105206459A priority Critical patent/CN102941414A/en
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Abstract

The invention discloses a pre-filled wire stirring friction welding method and relates to a stirring friction welding method. By the method, the problem that the effective thickness of a weld joint is reduced in the conventional stirring friction welding process. The method comprises the following steps of: 1, clamping a welded workpiece; 2, welding a start section of a pre-filled wire, wherein the welding length is 100mm, and a stirring head stands still at a start position of the pre-filled wire; 3, determining the pressing depth of the stirring head, namely pressing the stirring head into the welded workpeice at the start position of the pre-filled wire, wherein the depth of a shoulder pressed into the workpiece is 0.1mm, and the depth of a semicylindrical static shoulder sleeve pressed into the workpiece is 0.05mm; and 4, performing stirring friction welding on the pre-filled wire, namely performing pre-filled wire welding by a welding gun along the welding direction by using a TIG (tungsten-inert gas) or MIG (metal-inert gas) welding method, wherein the welding current is 100A, the traveling speed of the welding gun is 1.0 m/min, and the stirring head and the welding gun synchronously perform stirring friction welding. The method is applied to stirring friction welding of aluminum alloy, magnesium alloy, copper alloy and special materials.

Description

The pre-friction stir welding method that fills silk
Technical field
The present invention relates to a kind of friction stir welding method, be specifically related to a kind of pre-silk filling friction stir welding method.
Background technology
Since Britain's institute of welding (TWI) was invented friction stir welding method in 1991; this technology is little because of its welding deformation, residual stress is little; need not protective gas and packing material; can eliminate pore, be mingled with, the weld defect such as crackle; and not producing arc light, flue dust, noise pollution etc., the characteristics such as construction weight of can significantly reduce cost simultaneously, save material, optimizing structure, alleviate aircraft receive the concern of various countries scientific research institution.Because this technology has the not available distinguishing feature of a lot of additive methods, it is used to space industry soon, and the welding of carrier rocket core level tank cylinder section longitudinal joint of new generation is exactly to select this method.Although utilize friction stir welding method can obtain high-quality welding point, but in actual stir friction welding process, there is certain inclination angle between main shaft and workpiece, also need simultaneously certain amount of being pressed into just can obtain reliable weld seam, and follow the generation of overlap defective, cause the thickness of joint to be lower than mother metal thickness, in some engineerings are used, had the weldment of overlap and attenuate just can be applied to product through machining again.Simultaneously, the friction between the shaft shoulder and the soldered material is main heat production mode, so that need to larger axial force could produce enough heat and guarantee that good appearance of weld, equipment and anchor clamps all need have enough rigidity to guarantee the firm clamping of workpiece.
Summary of the invention
The objective of the invention is for solving the problem of the effective throat thickness attenuate in the existing friction stir welding process, and a kind of pre-silk filling friction stir welding method is provided.
Described pre-silk filling friction stir welding method is realized according to following steps:
Step 1, clamping welded piece: the docking of the first welded piece and the second welded piece is arranged and the two is located in the same horizontal plane, and with the anchor clamps clamping on workbench, described the first welded piece and the second welded piece are sheet metal;
Step 2, in advance fill silk the initial segment welding: the original position that welding gun is placed two welded piece seams, adopt TIG or MIG welding method along the welding that fills silk in advance of the welding direction of the first welded piece and the second welded piece, weld length is 10mm～100mm, welding current is 10A～200A, the welding gun speed of travel is 0.1m/min～1.0m/min, and this moment, stirring-head was positioned at the original position transfixion of pre-silk filling;
Step 3, stirring-head press down determining of the degree of depth: in the pre-original position that fills silk, stirring-head is pressed into welded piece, the mixing needle of stirring-head is pressed into the original position of seam with 400 rev/mins～1500 rev/mins rotating speed, and half-cylindrical static shaft shoulder cover is static; The press-in speed of stirring-head is 1mm/min～10mm/min, mixing needle be pressed into the little 0.05mm～0.15mm of workpiece depth ratio thickness of workpiece, it is 0mm～0.1mm that the shaft shoulder is pressed into the workpiece degree of depth, the degree of depth that half-cylindrical static shaft shoulder casing pressure enters workpiece is 0mm～0.05mm;
Step 4, the pre-silk filling and the agitating friction welding: stirring-head reach the step 3 setting press down the degree of depth time, welding gun adopts TIG or MIG welding method along the welding direction welding that fills silk in advance, welding current is 10A～200A, the welding gun speed of travel is 0.1m/min～1.0m/min, stirring-head and welding gun carry out the agitating friction welding synchronously, welding gun is to the weld seam end position, blow-out, the pre-welding that fills silk finishes, friction stir welding continues to carry out friction stir welding along the weld seam that fills silk in advance, until friction stir welding is soldered to the weld seam end position, stirring-head is mentioned, and finishes the pre-friction stir welding process that fills silk.
The present invention has the following advantages: one, on the basis of common friction stir welding, introduced pre-silk filling welding gun, fill silk in advance by TIG or MIG butt welded seam, increase weld reinforcement, thereby solve the problems such as attenuate of the effective throat thickness of conventional friction stir welding existence.Two, the method for filling silk can be carried out pre-determined bit to test specimen in advance, prevents in the friction stir welding process, and two test specimens are separated, and there is the space axis of a weld position, the phenomenon of appearance of weld metal deficiency; Three, fill silk in advance process and friction stir welding process of TIG or MIG is synchronous, and in advance silk filling process has the effect of preheating weld seam, has improved the speed of welding of friction stir welding; Four, the present invention can obtain smooth weld seam, efficiently solves the scalelike mark on conventional stir friction welding seam surface, is applicable to the demand of friction stir welding association area.
Description of drawings
Fig. 1 is pre-silk filling friction stir welding method schematic diagram of the present invention; Fig. 2 is that stirring body 3 and half-cylindrical static shaft shoulder cover 4 are pressed into position view in the specific embodiment of the invention one step 3; Fig. 3 is the I partial enlarged drawing of Fig. 2.
The specific embodiment:
The specific embodiment one: in conjunction with Fig. 1～Fig. 3 present embodiment is described, the pre-silk filling friction stir welding method of present embodiment is realized according to following steps:
Step 1, clamping welded piece: with the first welded piece 5 with the docking of the second welded piece 6 arranges and the two is located in the same horizontal plane, and with the anchor clamps clamping on workbench, described the first welded piece 5 and the second welded piece 6 are sheet metal;
Step 2, in advance fill silk the initial segment welding: the original position O that welding gun 1 is placed two welded piece seams, adopt TIG or MIG welding method along the welding that fills silk in advance of the welding direction of the first welded piece 5 and the second welded piece 6, weld length is 10mm～100mm, welding current is 10A～200A, the welding gun speed of travel is 0.1m/min～1.0m/min, and this moment, stirring-head 3 was positioned at the original position O transfixion of pre-silk filling; TIG is inert gas tungsten electrode protection weldering, and MIG is melting pole gas shielded arc welding;
Step 3, stirring-head 3 press down determining of the degree of depth: at the pre-original position O that fills silk, stirring-head 3 is pressed into welded piece, the mixing needle 3-1 of stirring-head 3 is pressed into the original position O of seam with 400 rev/mins～1500 rev/mins rotating speed, and it is 4 static that the half-cylindrical static shaft shoulder overlaps; The press-in speed of stirring-head 3 is 1mm/min～10mm/min, mixing needle 3-1 is pressed into workpiece depth H 1 than the little 0.05mm～0.15mm of thickness of workpiece T, it is 0mm～0.1mm that shaft shoulder 3-2 is pressed into the workpiece degree of depth, and the depth H 2 that half-cylindrical static shaft shoulder cover 4 is pressed into workpiece is 0mm～0.05mm;
Step 4, the pre-silk filling and the agitating friction welding: stirring-head 3 reach the step 3 setting press down the degree of depth time, welding gun 1 adopts TIG or MIG welding method along the welding direction welding that fills silk in advance, welding current is 10A～200A, welding gun 1 speed of travel is 0.1m/min～1.0m/min, stirring-head 3 carries out the agitating friction welding synchronously with welding gun 1, welding gun 1 is to the weld seam end position, blow-out, the pre-welding that fills silk finishes, friction stir welding continues to carry out friction stir welding along the weld seam that fills silk in advance, until friction stir welding is soldered to the weld seam end position, stirring-head 3 is mentioned, and finishes the pre-friction stir welding process that fills silk.Described pre-silk filling refers in the friction stir welding process, and the in advance butt welded seam processing that fills silk increases effective throat thickness, makes it to offset with the thinning of friction stir welding butt welded seam effective thickness, makes the weld seam one-shot forming, avoids reprocessing.
The specific embodiment two: in conjunction with Fig. 2 present embodiment is described, the degree of depth that the half-cylindrical static shaft shoulder cover 4 in the step 3 of present embodiment is pressed into workpiece is pressed into the workpiece degree of depth less than shaft shoulder 3-2's.Other steps are identical with the specific embodiment one.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1, fill silk in advance process and friction stir welding process of TIG in the step 4 of present embodiment or MIG carried out synchronously, and the welding position of friction stir welding is positioned at the position of the rear 10mm～100mm of pre-silk filling electric arc 2.Other steps are identical with the specific embodiment one.
The specific embodiment four: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 20mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment five: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 30mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment six: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 40mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment seven: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 50mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment eight: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 60mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment nine: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 70mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
The specific embodiment ten: in conjunction with Fig. 1 present embodiment is described, the stirring-head 3 in the step 2 of present embodiment is 80mm with welding gun 1 distance.Other steps are identical with the specific embodiment three.
Application example of the present invention:
Example 1, the welding two thick be the banjo fixing butt jointing of 6064 aluminium alloys of 3mm.Adopt pre-silk filling friction stir welding method of the present invention, adopt the TIG weldering, electric current 200A, TIG welding gun and stirring-head are at a distance of 30mm, and speed of welding 0.8m/min is in the friction stir welding process, 800 rev/mins of stirring-head rotating speeds, press-in speed 3mm/min, the shaft shoulder are pressed into thickness H1 than the little 0.1mm of thickness of workpiece T, and half-cylindrical static shaft shoulder casing pressure enters thickness H2 than the little 0.05mm of thickness of workpiece T.
Example 2, the welding two thick be the banjo fixing butt jointing of 3004 aluminium alloys of 1.5mm.Adopt pre-silk filling friction stir welding method of the present invention, adopt the TIG weldering, electric current 100A, TIG welding gun and stirring-head are at a distance of 20mm, and speed of welding 0.9m/min is in the friction stir welding process, 600 rev/mins of stirring-head rotating speeds, press-in speed 2mm/min, the shaft shoulder are pressed into thickness H1 than the little 0.05mm of thickness of workpiece T, and half-cylindrical static shaft shoulder casing pressure enters thickness H2 than the little 0.02mm of thickness of workpiece T.
Example 3, the welding two thick be the banjo fixing butt jointing of 7075 aluminium alloys of 8mm.Adopt the pre-friction stir welding method that fills silk, adopt the MIG weldering, electric current 200A, MIG welding gun and stirring-head are at a distance of 50mm, and speed of welding 0.4m/min is in the friction stir welding process, 800 rev/mins of stirring-head rotating speed rotating speeds, press-in speed 4mm/min, the shaft shoulder are pressed into thickness H1 than the little 0.1mm of thickness of workpiece T, and half-cylindrical static shaft shoulder casing pressure enters thickness H2 than the little 0.05mm of thickness of workpiece T.
Above-mentioned three examples all adopt pre-silk filling friction stir welding method to weld, and the pre-silk filling process of TIG or MIG butt welded seam increases weld reinforcement, have solved the phenomenon of the attenuate of the effective throat thickness that conventional friction stir welding exists.Appearance of weld is attractive in appearance, has eliminated the scalelike mark of conventional stir friction welding seam.

Claims (10)

1. pre-friction stir welding method that fills silk, it is characterized in that: described pre-silk filling friction stir welding method is realized according to following steps:
Step 1, clamping welded piece: the docking of the first welded piece (5) and the second welded piece (6) is arranged and the two is located in the same horizontal plane, and with the anchor clamps clamping on workbench, described the first welded piece (5) and the second welded piece (6) are sheet metal;
Step 2, in advance fill silk the initial segment welding: the original position (O) that welding gun (1) is placed two welded piece seams, adopt TIG or MIG welding method along the welding that fills silk in advance of the welding direction of the first welded piece (5) and the second welded piece (6), weld length is 10mm～100mm, welding current is 10A～200A, the welding gun speed of travel is 0.1m/min～1.0m/min, and stirring-head this moment (3) is positioned at original position (O) transfixion of pre-silk filling;
Step 3, stirring-head (3) press down determining of the degree of depth: in the pre-original position (O) that fills silk, stirring-head (3) is pressed into welded piece, the mixing needle (3-1) of stirring-head (3) is pressed into the original position (O) of seam with 400 rev/mins～1500 rev/mins rotating speed, half-cylindrical static shaft shoulder cover (4) is static; The press-in speed of stirring-head (3) is 1mm/min～10mm/min, mixing needle (3-1) be pressed into the workpiece degree of depth (H1) than the little 0.05mm～0.15mm of thickness of workpiece (T), it is 0mm～0.1mm that the shaft shoulder (3-2) is pressed into the workpiece degree of depth, and the degree of depth (H2) that half-cylindrical static shaft shoulder cover (4) is pressed into workpiece is 0mm～0.05mm;
Step 4, the pre-silk filling and the agitating friction welding: stirring-head (3) reach the step 3 setting press down the degree of depth time, welding gun (1) adopts TIG or MIG welding method along the welding direction welding that fills silk in advance, welding current is 10A～200A, welding gun (1) speed of travel is 0.1m/min～1.0m/min, stirring-head (3) carries out the agitating friction welding synchronously with welding gun (1), welding gun (1) is to the weld seam end position, blow-out, the pre-welding that fills silk finishes, friction stir welding continues to carry out friction stir welding along the weld seam that fills silk in advance, until friction stir welding is soldered to the weld seam end position, stirring-head (3) is mentioned, and finishes the pre-friction stir welding process that fills silk.
2. described pre-silk filling friction stir welding method according to claim 1 is characterized in that: the degree of depth that the half-cylindrical static shaft shoulder cover (4) in the step 3 is pressed into workpiece is pressed into the workpiece degree of depth less than the shaft shoulder (3-2).
3. described pre-silk filling agitating friction welding method according to claim 1, it is characterized in that, fill silk in advance process and friction stir welding process of TIG in the step 4 or MIG carried out synchronously, and the welding position of friction stir welding is positioned at the position of the rear 10mm～100mm of pre-silk filling electric arc (2).
4. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 20mm with welding gun (1) distance.
5. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 30mm with welding gun (1) distance.
6. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 40mm with welding gun (1) distance.
7. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 50mm with welding gun (1) distance.
8. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 60mm with welding gun (1) distance.
9. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 70mm with welding gun (1) distance.
10. described pre-silk filling agitating friction welding method according to claim 3 is characterized in that, the stirring-head in the step 2 (3) is 80mm with welding gun (1) distance.
CN2012105206459A 2012-12-06 2012-12-06 Pre-filled wire stirring friction welding method Pending CN102941414A (en)

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Cited By (18)

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CN103157903A (en) * 2013-04-12 2013-06-19 哈尔滨工业大学 Strip type welding wire feeding-along-with-welding friction stir welding method capable of removing welding line thinning
CN103170726A (en) * 2013-04-12 2013-06-26 哈尔滨工业大学 Strap-shaped welding wire filling-in type stirring friction treatment method
CN103962715A (en) * 2013-09-13 2014-08-06 南车青岛四方机车车辆股份有限公司 Vertically compensated stirring friction welding technique
CN104551379A (en) * 2014-12-19 2015-04-29 董春林 FSW (Friction-stir Welding) method assisted by heat source
CN105081552A (en) * 2015-08-03 2015-11-25 黄山学院 Method and device for preventing sheet aluminum alloy stirring friction connecting area from generating thinning effect in connecting process
JP2015217434A (en) * 2014-05-21 2015-12-07 新日鐵住金ステンレス株式会社 Method for improving corrosion resistance of duplex stainless steel welded part
CN106956059A (en) * 2017-05-11 2017-07-18 江苏阿斯美特精工科技有限公司 A kind of increasing material manufacturing mechanism and increasing material manufacturing device and increasing material manufacturing method
JP2018086678A (en) * 2016-11-22 2018-06-07 株式会社神戸製鋼所 Method for manufacturing aluminum structural member
CN108581175A (en) * 2018-04-24 2018-09-28 辽宁忠旺铝合金精深加工有限公司 A kind of aluminum alloy stirring friction welding method with melting welding tack weld
CN108941882A (en) * 2018-08-29 2018-12-07 哈尔滨工业大学（威海） A kind of method of pre- built-up welding auxiliary dead axle shoulder agitating friction weldering welding T junction
CN109202273A (en) * 2018-03-21 2019-01-15 中国航空制造技术研究院 A kind of silk filling agitating friction increasing material manufacturing device and increasing material manufacturing method
CN109590625A (en) * 2019-01-16 2019-04-09 福州大学 A kind of electric arc increases the composite manufacturing method of material forming and mixing yoghurt
CN110802317A (en) * 2019-11-15 2020-02-18 中车长春轨道客车股份有限公司 Static shaft shoulder wire filling friction stir welding machine head system
CN111151904A (en) * 2020-02-11 2020-05-15 重庆理工大学 Dissimilar metal arc melting-brazing method based on gnawing cutting assistance
CN111786227A (en) * 2019-04-05 2020-10-16 阿发屋株式会社 Method for manufacturing bus bar by friction stir welding
CN112743249A (en) * 2020-12-24 2021-05-04 西南交通大学 Method and system for stirring and strengthening welding seam of composite layer based on electric arc melting of base material
CN112894123A (en) * 2021-01-29 2021-06-04 华南理工大学 Friction stir welding method for aluminum-copper dissimilar metal
CN113996932A (en) * 2021-11-15 2022-02-01 哈焊国创(青岛)焊接工程创新中心有限公司 Welding system and welding method for eliminating weld reinforcement and undercut defects

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CN103157903A (en) * 2013-04-12 2013-06-19 哈尔滨工业大学 Strip type welding wire feeding-along-with-welding friction stir welding method capable of removing welding line thinning
CN103170726A (en) * 2013-04-12 2013-06-26 哈尔滨工业大学 Strap-shaped welding wire filling-in type stirring friction treatment method
CN103962715A (en) * 2013-09-13 2014-08-06 南车青岛四方机车车辆股份有限公司 Vertically compensated stirring friction welding technique
JP2015217434A (en) * 2014-05-21 2015-12-07 新日鐵住金ステンレス株式会社 Method for improving corrosion resistance of duplex stainless steel welded part
CN104551379A (en) * 2014-12-19 2015-04-29 董春林 FSW (Friction-stir Welding) method assisted by heat source
CN105081552A (en) * 2015-08-03 2015-11-25 黄山学院 Method and device for preventing sheet aluminum alloy stirring friction connecting area from generating thinning effect in connecting process
CN105081552B (en) * 2015-08-03 2017-02-22 黄山学院 Method and device for preventing sheet aluminum alloy stirring friction connecting area from generating thinning effect in connecting process
JP2018086678A (en) * 2016-11-22 2018-06-07 株式会社神戸製鋼所 Method for manufacturing aluminum structural member
CN106956059A (en) * 2017-05-11 2017-07-18 江苏阿斯美特精工科技有限公司 A kind of increasing material manufacturing mechanism and increasing material manufacturing device and increasing material manufacturing method
CN109202273B (en) * 2018-03-21 2020-09-25 中国航空制造技术研究院 Wire filling stirring friction additive manufacturing device and additive manufacturing method
CN109202273A (en) * 2018-03-21 2019-01-15 中国航空制造技术研究院 A kind of silk filling agitating friction increasing material manufacturing device and increasing material manufacturing method
CN108581175A (en) * 2018-04-24 2018-09-28 辽宁忠旺铝合金精深加工有限公司 A kind of aluminum alloy stirring friction welding method with melting welding tack weld
CN108941882A (en) * 2018-08-29 2018-12-07 哈尔滨工业大学（威海） A kind of method of pre- built-up welding auxiliary dead axle shoulder agitating friction weldering welding T junction
CN109590625A (en) * 2019-01-16 2019-04-09 福州大学 A kind of electric arc increases the composite manufacturing method of material forming and mixing yoghurt
CN111786227A (en) * 2019-04-05 2020-10-16 阿发屋株式会社 Method for manufacturing bus bar by friction stir welding
CN110802317A (en) * 2019-11-15 2020-02-18 中车长春轨道客车股份有限公司 Static shaft shoulder wire filling friction stir welding machine head system
CN110802317B (en) * 2019-11-15 2024-03-22 中车长春轨道客车股份有限公司 Static shaft shoulder wire filling friction stir welding machine head system
CN111151904A (en) * 2020-02-11 2020-05-15 重庆理工大学 Dissimilar metal arc melting-brazing method based on gnawing cutting assistance
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CN112743249A (en) * 2020-12-24 2021-05-04 西南交通大学 Method and system for stirring and strengthening welding seam of composite layer based on electric arc melting of base material
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CN113996932A (en) * 2021-11-15 2022-02-01 哈焊国创(青岛)焊接工程创新中心有限公司 Welding system and welding method for eliminating weld reinforcement and undercut defects

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Application publication date: 20130227