CN103639587B - A kind of for the plane heat pipe devices and methods therefor in agitating friction welding - Google Patents

A kind of for the plane heat pipe devices and methods therefor in agitating friction welding Download PDF

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Publication number
CN103639587B
CN103639587B CN201310555276.1A CN201310555276A CN103639587B CN 103639587 B CN103639587 B CN 103639587B CN 201310555276 A CN201310555276 A CN 201310555276A CN 103639587 B CN103639587 B CN 103639587B
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China
Prior art keywords
heat pipe
plane heat
tank
plane
weld seam
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Expired - Fee Related
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CN201310555276.1A
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CN103639587A (en
Inventor
芦笙
杨代立
陈书锦
陈静
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Jiangsu University of Science and Technology
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Jiangsu University of Science and Technology
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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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/123—Controlling or monitoring the welding process
    • B23K20/1235—Controlling or monitoring the welding process with temperature control during joining
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/003—Cooling means

Abstract

The invention discloses a kind of for the plane heat pipe devices and methods therefor in agitating friction welding, plane heat pipe device comprises the first plane heat pipe assembly and the second plane heat pipe assembly, plane heat pipe is applied to weld seam both sides and upper surface thereof simultaneously, respectively its condensation segment is extend out to test plate (panel) outside and extend in the tank of adjustable flow velocity.First plane heat pipe will can weld position heat conduction to position to be welded, and strengthen the prior preheating to test plate (panel), the second plane heat pipe carries out radiating and cooling to the weld seam be still under the condition of high temperature.The present invention does not need liquid medium to introduce surface of the work to be welded or welding region, compact conformation, be easy to make, reliability is high, heat source temperature can be made to control in rational limit of temperature rise, can dispel the heat efficiently to the weld seam being in the condition of high temperature timely and effectively, and the waste heat of welding heat source is effectively conducted to workpiece to be welded, reduce the friction of stirring tool, wearing and tearing, simultaneously, reach and improve seam organization, the final object improving weld seam combination property.

Description

A kind of for the plane heat pipe devices and methods therefor in agitating friction welding
Technical field
The present invention relates to a kind of for the plane heat pipe devices and methods therefor in agitating friction welding, belong to energy source and power and material engineering field.
Background technology
Friction stir welding (Friction Stir Welding, FSW) be a kind of novel solid phase joining technique, overcome fusion welding method and easily crack the problem with weld defects such as pores, make some material being in the past difficult to melting welding achieve the welding of high-quality, and in fields such as welding of aluminum, magnesium and alloys thereof, there is irreplaceable clear superiority.In friction stir welding process, stirring-head and materials to be welded rub and produce high temperature, and stirring-head adjacent material enters thermoplastification state, and heat and power effect under occur spread and dynamic recrystallization.But, under usual conditions, friction stir welding process is all carry out under the media environments such as air, and surrounding medium thermophysical property is poor, in welding process, be difficult to abundant absorption, scatter and disappear frictional heat, be unfavorable for weld seam quick cooling and obtain evenly, narrower field of welding temperature.Meanwhile, define wider heat affected area in weld seam both sides, very easily cause the thick of seam organization and inhomogeneities, and cause larger welding residual thermal stress, thus reduce the mechanical property of weld seam.At present, researcher changes Thermal Cycle and thermo parameters method situation by the mode introducing cooling medium, thus reaches the effect improved stir friction welding seam and be shaped, improve joint mechanical property.Wherein, comparatively common methods adopts immersion friction stir welding (Submerged Friction Stir Welding-SFSW) (number of patent application: 200810209844.1,200910072037.4), in the method, whole welding process all completes in water, utilizes water-cooled effect to make welding point force cooling.In addition, researcher is had to adopt array jet impact heat sink system (number of patent application 200510105425.X), Local cooling is carried out to the weld seam being still in the condition of high temperature, thus control welding stress and distortion, this invention be mainly applicable to the stress that occurs when solving agitating friction welding thin-wall member and distortion etc. problem.Under above-mentioned several type of cooling all makes weldment be in " humidity " environment, weld seam exists inhales hydrogen defect and etching problem, and its equipment is comparatively complicated.
Hot pipe technique is the one heat transfer new technology occurred the sixties in 20th century, its capacity of heat transmission exceedes the capacity of heat transmission of any known metal, main dependence is enclosed in worker quality liquid phase transformation repeatedly in pipe (evaporation, condensation) and carries out efficient heat transfer, can when without the need to amount of heat being carried out long-distance transmissions by its very little sectional area when additionaling power.Heat pipe has very high thermal conductivity, excellent isothermal, excellent thermo-responsive and the performance such as thermal diode and thermal switch, at present, obtains a wide range of applications at industrial circle.
At present, agitating friction is welded in the aspect also Shortcomings such as joint quality control, apparatus and method, effectively must improve the problem that friction stir welding heat is too concentrated, and the too much heat simultaneously produced for welding heat source place effectively utilizes.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of for the plane heat pipe devices and methods therefor in agitating friction welding, effective uneven distribution situation improving friction stir welding heat and temperature field, and effectively utilize for the waste heat in welding process.
Technical scheme: for achieving the above object, of the present invention a kind of for the plane heat pipe devices and methods therefor in agitating friction welding, in welding process, utilize the excellent heat conductivility of heat pipe realize the heat radiation of butt welded seam and heat transferred in time test plate (panel) position to be welded; Meanwhile, water-cooled is carried out to the condensation segment of plane heat pipe, improve the cooling effectiveness of heat pipe.Concrete scheme is as follows:
A kind of for the plane heat pipe device in agitating friction welding, comprise the first plane heat pipe assembly and the second plane heat pipe assembly, described first plane heat pipe assembly comprises a pair first plane heat pipe, this is applied to both sides, test plate (panel) weld seam initiating terminal position to the first evaporator section of the first plane heat pipe, and this stretches in the first tank to the first condensation segment of the first plane heat pipe; Described second plane heat pipe assembly comprises the second plane heat pipe, and the second evaporator section of the second plane heat pipe is close to weld seam initiating terminal upper surface, and the second condensation segment of the second plane heat pipe stretches in the second tank; Described first evaporator section and the second evaporator section are respectively the heat absorption end of the first plane heat pipe and the second plane heat pipe, and described first condensation segment and the second condensation segment are respectively the thermal release end of the first plane heat pipe and the second plane heat pipe.
Described first tank and the second tank include water inlet valve and outlet valve.First tank and the second tank are lumen type rectangular structure, and adopt galvanized steel plain sheet manufacture, ensure that it has enough capacity and decay resistance, tank front end face is processed with the oblong openings of left and right symmetry, for plane heat pipe condensation segment is stretched into tank inside.Meanwhile, process the through hole of same diameter in the left and right side of tank, and be fit into mouth of a river valve and outlet valve.
Described first plane heat pipe and the second plane heat pipe include shell and are positioned at liquid working substance and the liquid-sucking core of shell, and described shell is a space cavity with rectangular cross section and upper and lower plane closed.Shell surface has certain flatness, after being pumped into negative pressure in shell, fill to encapsulate after appropriate liquid working substance.
Described shell is have the red copper of superior thermal conductivity or copper alloy forms, and described liquid-sucking core is that foam metal material is made, and described liquid working substance is distilled water, methyl alcohol or acetone, and liquid working substance is for can be also be dissolved with SiO 2, Al 2o 3or the nano-fluid of the distilled water of the particle such as CuO nanometer, methyl alcohol or acetone.
Thermometer is provided with near outlet valve place in described first tank and the second tank.Described thermometer for measuring the water temperature near sink outlet, and according to the water temperature of delivery port height, regulates the water velocity into and out of water valve.
Based on an above-mentioned method for the plane heat pipe device in agitating friction welding, comprise the following steps:
1) the first evaporator section of a pair first plane heat pipe is applied to both sides, test plate (panel) weld seam initiating terminal position respectively, the second evaporator section of the second plane heat pipe is close to weld seam initiating terminal upper surface;
2) the first tank and the second tank are placed in respectively the forward and backward two ends of test plate (panel), respectively the first condensation segment and the second condensation segment are stretched to the first tank and the second tank inside again, open water inlet valve and the outlet valve of the first tank and the second tank, by regulating water velocity and discharge, control its leaving water temperature;
3) carry out agitating friction welding to test plate (panel), follow the second plane heat pipe being close to weld seam initiating terminal upper surface position closely stirring tool, follow the tracks of weld movement, meanwhile, whole second plane heat pipe assembly moves with stirring tool; Heat welding process produced by the first plane heat pipe is conducted to rapidly test plate (panel) position to be welded and realizes weld preheating, carries out cooling heat dissipation by the second plane heat pipe butt welded seam.
In described step 1) in, first brush the heat-conducting silicone grease of thin layer at the shell bottom surface of the first plane heat pipe and the second plane heat pipe, and then be placed on test plate (panel) weld seam initiating terminal two side position and weld seam initiating terminal upper surface position respectively.
Beneficial effect: of the present invention a kind of for the plane heat pipe devices and methods therefor in agitating friction welding, compared with prior art, has the following advantages:
(1) hot pipe technique high for heat conductive efficiency is applied to friction stir welding, the plane heat pipe being positioned at weld seam upper surface can realize cooling efficiently by butt welded seam (comprising heat affected area) in time, accelerate the cooling velocity of welding process, reduce Peak temperature, reduce and reduce width and the softening degree of welding heat affected zone, the refinement crystal grain of weld metal zone, reduces welding stress, improves the comprehensive mechanical property of joint.
(2) utilize the heat conduction characteristic rapidly of heat pipe, the waste heat produced in welding process is used.Be positioned at weld seam both sides plane heat pipe can to (material) to be welded position of test plate (panel) carry out weld preheating soften, greatly reduce advancing and rotational resistance of stirring tool in welding process, especially to friction stir welding welding materials with high melting point and to raising speed of welding, production efficiency, reduce energy consumption and there is positive directive significance.
(3) cooling system of device has stronger regulatory function, by changing the flow velocity of cooling water, can carry out cooling adjustment, realize the optimal control of butt welded seam quality to the stirring friction-welding technique heat production under different materials, different parameters.
(4) structure is simple, easy to make, practical, under the condition ensureing size coupling, can be applicable to different materials, the heat radiation of different size test plate (panel) stir friction welding seam and quality control.
Accompanying drawing explanation
Fig. 1 is for the plane heat pipe device schematic diagram in agitating friction welding;
Fig. 2 is plane heat pipe cross sectional representation;
In figure, 1 first plane heat pipe, 2 first plane heat pipe, 3 second tanks, 4 first tanks, 5 water inlet valves, 6 outlet valves, 9 weld seam initiating terminals, 10 liquid working substances, 11 liquid-sucking cores, 12 shells, 13 first evaporator sections, 14 second evaporator sections, 15 first condensation segments, 16 second condensation segments, 17 oblong openings, 18 thermometers, 19 stirring tools, 20 test plate (panel)s.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As illustrated in fig. 1 and 2, a kind of for the plane heat pipe device in agitating friction welding, comprise the first plane heat pipe assembly and the second plane heat pipe assembly, first plane heat pipe assembly comprises a pair first plane heat pipe 1, this is applied to both sides, test plate (panel) 20 weld seam initiating terminal 9 position to the first evaporator section 13 of the first plane heat pipe 1, and this stretches in the first tank 4 to the first condensation segment 15 of the first plane heat pipe 1; The second evaporator section 14 that second plane heat pipe assembly comprises the second plane heat pipe 2, second plane heat pipe 2 is close to weld seam initiating terminal 9 upper surface, and the second condensation segment 16 of the second plane heat pipe 2 stretches in the second tank 3; First evaporator section 13 and the second evaporator section 14 are respectively the heat absorption end of the first plane heat pipe 1 and the second plane heat pipe 2, and the first condensation segment 15 and the second condensation segment 16 are respectively the thermal release end of the first plane heat pipe 1 and the second plane heat pipe 2.
In the present embodiment, the first tank 4 and the second tank 3 include water inlet valve 5 and outlet valve 6.First tank 4 and the second tank 3 are lumen type rectangular structure, and adopt galvanized steel plain sheet manufacture, ensure that it has enough capacity and decay resistance, tank front end face is processed with the oblong openings 17 of left and right symmetry, for plane heat pipe condensation segment is stretched into tank inside.Meanwhile, process the through hole of same diameter in the left and right side of tank, and be fit into mouth of a river valve 5 and outlet valve 6.First plane heat pipe 1 and the second plane heat pipe 2 include shell 12 and are positioned at liquid working substance 10 and the liquid-sucking core 11 of shell 12, and shell 12 is a space cavity with rectangular cross section and upper and lower plane closed.Shell 12 surface has certain flatness, fills with encapsulation after appropriate liquid working substance 10 after being pumped into negative pressure in shell 12.Shell 12 forms for the red copper or copper alloy with superior thermal conductivity, and liquid-sucking core 11 is made for foam metal material, and liquid working substance 10 is distilled water, methyl alcohol or acetone, and liquid working substance 10 is for can be also be dissolved with SiO 2, Al 2o 3or the nano-fluid of the distilled water of the particle such as CuO nanometer, methyl alcohol or acetone.Thermometer 18 is provided with near outlet valve 6 place in first tank 4 and the second tank 3.Thermometer 18 for measuring the water temperature near sink outlet, and according to the water temperature of delivery port height, regulates the water velocity into and out of water valve.
In accordance with the following methods weld seam (and both sides) metal in agitating friction process cooled and weld the preheating of front test plate (panel) 20:
First, the clamping requirement of test plate (panel) 20 by friction stir welding is assembled, and reserve the space of one fixed width in weldment joint location to be welded, ensure advancing and the placement of plane heat pipe of stirring-head.
Then, select the plane heat pipe that two specifications are consistent, i.e. the first plane heat pipe 1, and by the condensation segment entrance of its first condensation segment 15 respectively by the left and right position of the first tank 4, i.e. oblong openings 17, extend in the first tank 4.According to test plate (panel) 20 length (fusion length to be cooled), the first evaporator section 13 of the first plane heat pipe 1 is reserved in outside the first tank 4.Select else by the 3rd rhizoplane heat pipe, i.e. the second plane heat pipe 2, adopt the same manner, stretched into by the second condensation segment 16 in second tank 3, it is outside that the second evaporator section 14 stays the second tank 3.
Afterwards, water-resistant adhesives or other sealing glue is adopted to seal tank oblong openings 17.When plane heat pipe and tank secure fit integral after, the plane heat pipe bottom surface staying tank outside is evenly brushed the heat-conducting silicone grease of thin layer, be placed on test plate (panel) 20 connector center line two side position to be welded by parallel respectively for two first plane heat pipe 1 and treat the upper surface of welding line again, ensure that bottom surface and the test plate (panel) 20 of the first heat pipe are fully fitted, two tanks are placed on the jig of the forward and backward side of test plate (panel) 20 to be welded respectively.
Finally, open the water inlet valve 5 of the first tank 4 and the second tank 3, inject cooling water, water to be cooled opened outlet valve 6 after not having condensation segment, controlled suitable, stable water velocity.Above cooling system assembling also, after normal work, can carry out welding to test plate (panel) 20 to be welded, and in welding process, then the second evaporator section 14 of the second plane heat pipe 2 is close to the upper surface of weld seam front end, move with stirring tool 19.In whole welding process, according to the heat production size of welding, and water temperature height measured by thermometer 18, regulates the uninterrupted of the first tank 4 and the second tank 3 cooling water respectively, realizes the transmission to weld metal heat in welding process and cooling.
In the present embodiment, by changing the current size of turnover first tank 4 and the second tank 3, effectively can control the first tank 4 and the second tank 3 inner cooling water to the first plane heat pipe 1 and the first condensation segment 15 of the second plane heat pipe 2 and the radiating effect of the second condensation segment 16, thus under can ensureing that whole first plane heat pipe 1 and the second plane heat pipe 2 are in lower temperature conditions, the heat at welding heat source place can constantly be conducted by the first evaporator section 13 of two groups of heat pipes and the second evaporator section 14, the first plane heat pipe 1 and the second plane heat pipe 2 is made to remain efficient cooling heat dissipation, thus good cooling effect is played to whole welding process.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (8)

1. one kind for agitating friction welding in plane heat pipe device, it is characterized in that: comprise the first plane heat pipe assembly and the second plane heat pipe assembly, described first plane heat pipe assembly comprises a pair first plane heat pipe (1), this is applied to test plate (panel) (20) weld seam initiating terminal (9) both sides, position to first evaporator section (13) of the first plane heat pipe (1), and this stretches in the first tank (4) to first condensation segment (15) of the first plane heat pipe (1); Described second plane heat pipe assembly comprises the second plane heat pipe (2), second evaporator section (14) of the second plane heat pipe (2) is close to weld seam initiating terminal (9) upper surface, and second condensation segment (16) of the second plane heat pipe (2) stretches in the second tank (3); Described first evaporator section (13) and the second evaporator section (14) are respectively the heat absorption end of the first plane heat pipe (1) and the second plane heat pipe (2), and described first condensation segment (15) and the second condensation segment (16) are respectively the thermal release end of the first plane heat pipe (1) and the second plane heat pipe (2); First tank (4) and the second tank (3) are placed in the forward and backward two ends of test plate (panel) (20) respectively.
2. according to claim 1 for the plane heat pipe device in agitating friction welding, it is characterized in that: described first tank (4) and the second tank (3) include water inlet valve (5) and outlet valve (6).
3. according to claim 1 for the plane heat pipe device in agitating friction welding, it is characterized in that: described first plane heat pipe (1) and the second plane heat pipe (2) include shell (12) and be positioned at the liquid working substance (10) of shell (12) and liquid-sucking core (11), described shell (12) is a space cavity with rectangular cross section and upper and lower plane closed.
4. according to claim 3 for the plane heat pipe device in agitating friction welding, it is characterized in that: described shell (12) forms for the red copper or copper alloy with superior thermal conductivity, described liquid-sucking core (11) is made for foam metal material, and described liquid working substance (10) is distilled water, methyl alcohol or acetone.
5. according to claim 4 for the plane heat pipe device in agitating friction welding, it is characterized in that: described liquid working substance (10) is for being dissolved with SiO 2, Al 2o 3or the nano-fluid of the distilled water of CuO nano particle, methyl alcohol or acetone.
6. according to claim 2 for the plane heat pipe device in agitating friction welding, it is characterized in that: in described first tank (4) and the second tank (3), be provided with thermometer (18) near outlet valve (6) place.
7., based on the method for the plane heat pipe device in agitating friction welding described in any one of claim 1 to 6, it is characterized in that, comprise the following steps:
1) first evaporator section (13) of a pair first plane heat pipe (1) is applied to test plate (panel) (20) weld seam initiating terminal (9) both sides, position respectively, second evaporator section (14) of the second plane heat pipe (2) is close to weld seam initiating terminal (9) upper surface;
2) the first tank (4) and the second tank (3) are placed in respectively the forward and backward two ends of test plate (panel) (20), respectively the first condensation segment (15) and the second condensation segment (16) are stretched to the first tank (4) and the second tank (3) inside again, open water inlet valve (5) and the outlet valve (6) of the first tank (4) and the second tank (3), by regulating water velocity and discharge, control its leaving water temperature;
3) agitating friction welding is carried out to test plate (panel) (20), second plane heat pipe (2) that will be close to weld seam initiating terminal (9) upper surface position follows stirring tool (19) closely, follow the tracks of weld movement, meanwhile, whole second plane heat pipe assembly is mobile with stirring tool (19); By the first plane heat pipe (1), the heat that welding process produces is conducted to rapidly test plate (panel) (20) position to be welded and realize weld preheating, carry out cooling heat dissipation by the second plane heat pipe (2) butt welded seam.
8. method according to claim 7, it is characterized in that: in described step 1) in, first brush the heat-conducting silicone grease of thin layer at shell (12) bottom surface of the first plane heat pipe (1) and the second plane heat pipe (2), and then be placed on test plate (panel) (20) weld seam initiating terminal (9) two side position and weld seam initiating terminal (9) upper surface position respectively.
CN201310555276.1A 2013-11-11 2013-11-11 A kind of for the plane heat pipe devices and methods therefor in agitating friction welding Expired - Fee Related CN103639587B (en)

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CN110102872A (en) * 2019-06-11 2019-08-09 南京航空航天大学 A kind of agitating friction weldering Workpiece cooling device

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CN102794559A (en) * 2011-05-27 2012-11-28 三菱重工业株式会社 Friction stir welding apparatus
CN103212781A (en) * 2013-04-28 2013-07-24 江苏科技大学 High frequency contact-stirring friction hybrid welding device and welding method

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CN1739902A (en) * 2005-09-28 2006-03-01 中国航空工业第一集团公司北京航空制造工程研究所 Medium cooling, stirring and rubbing welding method and device
CN101439439A (en) * 2008-12-30 2009-05-27 哈尔滨工业大学 Friction stir welding method in underwater environment
KR20110075775A (en) * 2009-12-29 2011-07-06 주식회사 포스코 Friction stir welding device
CN102794559A (en) * 2011-05-27 2012-11-28 三菱重工业株式会社 Friction stir welding apparatus
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