CN109623132A - A kind of device and method improving 7 line aluminium alloy friction stir welding performances - Google Patents

A kind of device and method improving 7 line aluminium alloy friction stir welding performances Download PDF

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Publication number
CN109623132A
CN109623132A CN201811546981.4A CN201811546981A CN109623132A CN 109623132 A CN109623132 A CN 109623132A CN 201811546981 A CN201811546981 A CN 201811546981A CN 109623132 A CN109623132 A CN 109623132A
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China
Prior art keywords
water
plate
cooling
panel
fixture
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CN201811546981.4A
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Inventor
何长树
张志强
李颖
韦景勋
赵骧
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Northeastern University China
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Northeastern University China
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Priority to CN201811546981.4A priority Critical patent/CN109623132A/en
Publication of CN109623132A publication Critical patent/CN109623132A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/26Auxiliary equipment

Abstract

A kind of device improving 7 line aluminium alloy friction stir welding performances, including bottom liner plate, the top of bottom liner plate is for placing test plate (panel) to be welded, the two sides up and down of test plate (panel) are provided with water-cooling plate, the position of water-cooling plate respectively corresponds the heat affected area at left and right sides of weld seam, the two sides of bottom liner plate are additionally provided with the welding fixture for fixing test plate (panel), are provided with stirring-head above position while welding;The present invention has many advantages, such as that easy to operate, feasibility is strong and environmentally friendly, and effective the problem of inhibiting friction stir welding heat-affected zone softened;Water-cooling plate is placed respectively in heat affecting neighbouring position, can effectively limit influence of the position by Thermal Cycle, the coarsening rate that precipitated phase is strengthened in the position is reduced, to improve the mechanical property of connector;At intervals, influence very little of the water-cooling plate to weld metal zone temperature, guarantees the preferable fluid ability of weld metal zone metal, obtains flawless welding point in the welding process for water-cooling plate and weld metal zone.

Description

A kind of device and method improving 7 line aluminium alloy friction stir welding performances
Technical field
The invention belongs to materials processing technology fields, and in particular to a kind of 7 line aluminium alloy friction stir weldings of raising The device and method of energy.
Background technique
7 line aluminium alloys belong to (Al-Zn-Mg- (Cu)) heat-treatable strengthened type high strength alumin ium alloy, specific strength with higher And the advantages that specific stiffness, preferable corrosion resistance and excellent processing performance, it is Aeronautics and Astronautics, pressure vessel, railway transportation Etc. important one of the structural material of industries.Due to using conventional fused pole inert gas-shielded arc welding (Metal inert-gas Welding) and the protection of non-melt pole inert gas tungsten electrode weldering (Tungsten Inert Gas Welding) etc. techniques are aluminium to 7 Easily there is the defects of HOT CRACK FOR WELDING P, stomata when welding in alloy, so general 7 line aluminium alloy is considered as not solderable aluminium conjunction Gold.
Agitating friction weldering (Friction stir welding) is by Britain's institute of welding in one kind of invention in 1991 Solid phase welding processes.The stirring-head of the welding method rotate at high speed and friction of workpiece heat production, make material generate violent plasticity Deformation, with the walking of stirring-head, the metal of two sides thermoplastification is mutually mixed and completes to connect.Due to the performance of FSW connector is high, The advantages that environmental protection and welding residual stress are small, it is considered to be the preferred welding procedure of aluminium alloy.FSW connector is divided into nugget area (Nuggetzone, NZ), the thermomechanical zone of influence (Thermo-mechanically affect-ed zone, TMAZ), heat affecting Area (Heat affected zone, HAZ) and base material area (Base metal, BM).Although FSW thermal weld stress amount is lower, For 7 line aluminium alloy FSW connectors, heat affected area (HAZ) can occur significantly to soften, i.e. the hardness of 7 line aluminium alloy FSW connectors is bent Line is typical " W " type.This is because heat affected area is influenced by Thermal Cycle, precipitation strength, which is met, to be roughened, and is led Cause hardness and strength decline.And since 7 line aluminium alloys have stronger timeliness, with the extension of natural aging time, connector Hardness and strength close to nugget area will largely be restored, this is because stirring region is due to the play by stirring-head Strong stirring and high temperature circulation effect, a large amount of precipitation strengths, which are met, to be dissolved, and with natrual ageing, the precipitation power of hardening constituent is very Greatly, hardness and strength are caused to significantly improve.The roughening and precipitated phase of heat affected area mostly occurs greatly, only small part back dissolving to matrix In, in Natural Aging Process, which is precipitated power very little, causes the recovery extent of hardness and strength very low.Hot shadow The softened zone for ringing area is still connector position the weakest, i.e. fracture position.
Currently, improving the means of FSW joint performance mainly has: 1. are welded under the conditions of air and Water cooling medium;2. Connector post weld heat treatment.Chinese patent 201010594943.3 discloses the cooling medium of selection, through high-pressure nozzle device butt welding Slit is cooled down at area, the performance of Lai Tigao connector.The cooling medium that the above method uses can cause steel welding equipment Corrosion, and the flow control of cooling medium and recycling etc. have certain problems.Chinese patent 201720976083.7 discloses A kind of device for the Friction Stir Welding having cooling effect.Mainly coolant liquid is ejected into around weld metal zone, while coolant liquid Also it can circulate in the soleplate.The heat input that the test plate (panel) entirety cooling effect of the above method will lead to weld metal zone reduces, and reduces weld seam The problem of metal flow ability in area, welding defect easy to form;And the flexibility of fixture is poor.Chinese patent 201510139804.4 disclosing a kind of method for improving 7 line aluminium alloy friction stir welding quality and mechanical properties.Mainly Be to 7 be line aluminium alloy friction stir welding carry out post weld heat treatment, improve the mechanical property of connector, but this method engineering is answered Difficulty is big, and inefficient.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of raising 7 line aluminium alloy friction stir weldings The device and method of performance, technical solution are as follows:
A kind of device improving 7 line aluminium alloy friction stir welding performances, described device include bottom liner plate, bottom lining For placing test plate (panel) to be welded, the two sides up and down of test plate (panel) are provided with water-cooling plate, the position of water-cooling plate at the top of plate The heat affected area respectively corresponded at left and right sides of weld seam is set, the two sides of bottom liner plate are additionally provided with the weld clip for fixing test plate (panel) Have, is provided with stirring-head above position while welding.
Water-cooling plate includes being set to the water-cooling of test plate (panel) bottom to sink plate and the water-cooling that is set at the top of test plate (panel) Pressing plate, bottom liner plate top are opened up there are two groove, and two grooves are arranged in parallel, are respectively arranged with and its size in two grooves Compatible water-cooling sinks plate, water-cooling sink plate upper surface it is concordant with bottom liner plate upper surface, two water-coolings sink Plate is located at the lower section of heat affected area at left and right sides of test plate (panel) weld seam, and there are two water-cooling pressing plates for setting at the top of test plate (panel), respectively At left and right sides of weld seam, two water-cooling pressing plates are corresponding with the heavy Board position of the water-cooling of the lower part of test plate (panel) two respectively.
Cavity is provided in the heavy plate of two water-coolings, the cavity of the heavy plate of two water-coolings is connected by rubber hose Logical, the heavy plate of the water-cooling in left side is provided with the first water outlet, and the heavy plate of the water-cooling on right side is provided with the first water inlet;
Cavity is provided in two water-cooling pressing plates, the cavity of two water-cooling pressing plates is connected by rubber hose Logical, the water-cooling pressing plate in left side is provided with the second water outlet, and the water-cooling pressing plate on right side is provided with the second water inlet, and first Water inlet and the second water inlet are connected to the outlet valve of external industrial cooling water machine, the first water outlet and the second water outlet with It is connected to the inlet valve of external industrial cooling water machine.
The welding fixture is provided with two sets, is symmetrical arranged centered on the liner plate of bottom comprising fixture cover board, fixture spiral shell Bolt and fixture backing plate, bottom liner plate lower surface are connected with workbench, and fixture backing plate is securely fitted in the upper surface of workbench, It is overlapped at the top of one end of fixture cover board and fixture backing plate, the other end of fixture cover board and the top of water-cooling pressing plate overlap, folder Tool bolt runs through in the middle part of fixture cover board vertically and is spirally connected with workbench.
The side wall of two grooves offers thermometer hole, and thermocouple is equipped in thermometer hole, and thermocouple and external temperature are supervised Survey device electrical connection.
Between water-cooling plate and weld seam at intervals, defining the distance is L, 2mm≤L≤5mm.
L is preferably 2mm.
A method of 7 line aluminium alloy friction stir welding performances are improved, are stirred using a kind of 7 line aluminium alloys of aforementioned raising Mix the device of friction welding joint performance, which comprises the steps of:
Step 1: the heavy plate of two water-coolings is respectively placed in the groove of bottom liner plate two sides, two water-coolings are heavy The position of plate respectively corresponds the position of test plate (panel) weld seam two sides heat affected area, and the length and width dimensions of groove are slightly larger than the heavy plate of water-cooling The upper surface bottom liner plate upper surface of length and width dimensions, the heavy plate of water-cooling is concordant, by the heavy plate rubber hose of two water-coolings Connection, the first water inlet and the first water outlet are connected with Cool-water Machine for Industry respectively;
Step 2: carrying out mechanical grinding processing for the interface of two pieces of test plate (panel)s to be welded, remove surface oxide layer, so that examination Plate end face exposes metallic luster, and cleans surface with acetone, air-dries spare;
Step 3: two pieces of test plate (panel)s are placed at the top of the liner plate of bottom, the butted line of two test plate (panel)s and the symmetry axis weight of grooves on two sides Close, two water-cooling pressing plates be respectively placed in the upper surface of two pieces of test plate (panel)s, two, top water-cooling pressing plate respectively with lower part The heavy Board position of two water-coolings is corresponding, two water-cooling pressing plates rubber hose is connected to, the second water inlet and second Water outlet is connected with Cool-water Machine for Industry respectively;
Step 4: erecting and welding fixture is pressed in fixture cover board at the top of water-cooling pressing plate, to fix test plate (panel);
Step 5: two thermocouples are inserted into respectively in the thermometer hole of grooves on two sides side-walls, and will be hot with fine aluminium item Galvanic couple is fixed;
Step 6: industry cooling water dispenser is opened, and sets the temperature of recirculated cooling water, opens the water inlet of industry cooling water dispenser Valve and outlet valve are passed through cooling water into water-cooling pressing plate and the heavy plate of water-cooling, monitor the temperature test of two thermocouples Curve starts to be stirred friction welding after temperature curve is stablized.
The set temperature of industrial colling is -30~20 DEG C in the step 6.
Compared with prior art, the present invention has many advantages, such as that easy to operate, feasibility is strong and environmentally friendly, and effectively inhibits stirring The problem of friction welding joint heat-affected zone softened.Water-cooling plate is placed respectively in heat affecting neighbouring position, can effectively be limited The position is influenced by Thermal Cycle, the coarsening rate that precipitated phase is strengthened in the position is reduced, to improve the mechanics of connector Performance.Water-cooling plate and weld metal zone at intervals, so in the welding process water-cooling plate to weld metal zone temperature Influence very little, guarantee the preferable fluid ability of weld metal zone metal, obtain flawless welding point.Using thermocouple to temperature It measures, is conducive to the temperature variations for monitoring heat affected area in welding process, to advanced optimize welding procedure and weldering The tracing control for connecing quality provides more accurate data basis.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of apparatus of the present invention;
Fig. 2 is the overlooking structure diagram of apparatus of the present invention;
Fig. 3 is the assembling structure schematic diagram of bottom liner plate of the present invention and the heavy plate of water-cooling;
Fig. 4 is 7N01-T5 Aluminum Alloy Friction Stir Welding head microhardness curve in the embodiment of the present invention 1;
Fig. 5 is 7N01-T5 aluminium alloy convention stir friction heat affected area TEM picture in the embodiment of the present invention 1.
Fig. 6 is 7N01-T5 aluminium alloy part cold-zone agitating friction heat affected area TEM picture in the embodiment of the present invention 1.
Wherein: test plate (panel) 1;Stirring-head 2;Water-cooling pressing plate 3;Second water outlet 4;Second water inlet 5;Fixture cover board 6;Folder Has bolt 7;Fixture backing plate 8;Bottom liner plate 9;Water-cooling sinks plate 10;First water outlet 11;Thermometer hole 12;First water inlet 13;Workbench 14;Groove 15.
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
Embodiment 1
As shown in Figures 1 to 6, the present invention provides it is a kind of improve 7 line aluminium alloy friction stir welding performances device, Including bottom liner plate 9, for placing test plate (panel) 1 to be welded, the two sides up and down of test plate (panel) 1 are provided with water at the top of bottom liner plate 9 Cold heat sink, the position of water-cooling plate respectively corresponds the heat affected area at left and right sides of weld seam, between water-cooling plate and weld seam At intervals L, L are specially 2mm, and the two sides of bottom liner plate 9 are additionally provided with the welding fixture for fixing test plate (panel) 1, weldering The stirring-head 2 for being welded is provided with above seam position.
Water-cooling plate includes the heavy plate 10 of water-cooling for being set to 1 bottom of test plate (panel) and the water cooling for being set to 1 top of test plate (panel) Radiate pressing plate 3, is opened up at the top of bottom liner plate 9 there are two groove 15, two grooves 15 are arranged in parallel, set respectively in two grooves 15 It is equipped with the heavy plate 10 of water-cooling compatible with its size, the upper surface and 9 upper surface of bottom liner plate of the heavy plate 10 of water-cooling are flat Together, the heavy plate 10 of two water-coolings is located at the lower section of heat affected area at left and right sides of 1 weld seam of test plate (panel), is provided at the top of test plate (panel) 1 Two water-cooling pressing plates 3 are located at left and right sides of weld seam, two water-cooling pressing plates 3 respectively with the lower part of test plate (panel) 1 two Heavy 10 position of plate of water-cooling is corresponding.
Specifically, the heavy plate 10 of water-cooling makes using with a thickness of 3mm duralumin, and water-cooling pressing plate 3 not only acts as The cooling heat affected area effect in 1 top of test plate (panel) also suffers from the biggish extruding force of fixture, therefore using the stainless steel with a thickness of 6mm Plate production.
At a distance of 40mm between two 15 adjacent walls of groove, the size of groove 15 is 350mm × 50mm × 20mm (long × wide × it is deep), it is 349mm × 49mm × 20mm (long × wide × deep) that water-cooling, which sinks the size of plate 10, water-cooling pressing plate 3 having a size of 349mm × 49mm × 15mm (long × wide × deep).
Cavity is provided in the heavy plate 10 of two water-coolings, the cavity of the heavy plate 10 of two water-coolings passes through rubber hose Connection, the heavy plate 10 of the water-cooling in left side are provided with the first water outlet 11 being connected with its internal cavities, and the water cooling on right side dissipates Heat sink plate 10 is provided with the first water inlet 13 being connected with its internal cavities;
Cavity is provided in two water-cooling pressing plates 3, the cavity of two water-cooling pressing plates 3 is connected by rubber hose Logical, the water-cooling pressing plate 3 in left side is provided with the second water outlet 4 being connected with its internal cavities, the water-cooling pressure on right side Plate 3 is provided with the second water inlet 5 being connected with its internal cavities, the first water inlet 13 and the second water inlet 5 with external work The outlet valve of industry cooling water machine is connected to, the first water outlet 11 and the second water outlet 4 with the water inlet with external industrial cooling water machine Valve connection supplies cold water from industry cooling water dispenser to the first water inlet 13 and the second water inlet 5, and cold water is cold to weld heat-affected zone But it passes through afterwards and industry cooling water dispenser is back to by the first water outlet 11 and the second water outlet 4, wherein the heavy plate 10 of water-cooling and water cooling Cooling water inside heat dissipation pressing plate 3 is supplied by same Cool-water Machine for Industry.
The welding fixture is provided with two sets, is symmetrical arranged centered on bottom liner plate 9 comprising fixture cover board 6, fixture Bolt 7 and fixture backing plate 8,9 lower surface of bottom liner plate are connected with workbench 14, and fixture backing plate 8 is securely fitted in workbench 14 upper surface overlaps at the top of one end of fixture cover board 6 and fixture backing plate 8, the other end and water-cooling pressing plate of fixture cover board 6 3 top overlap joint, fixture bolt 7 is spirally connected through 6 middle part of fixture cover board and with workbench 14 vertically, using lever principle to water Cold heat dissipation pressing plate 3 is fixed, when screwing fixture bolt 7, fixture cover board 6 to fixture backing plate 8 and water-cooling pressing plate 3 simultaneously Apply pressure, makes to fit closely between heavy 10 three of plate of water-cooling pressing plate 3, test plate (panel) 1, water-cooling, to reach preferable Cooling effect, while also can reach the purpose of fixed test plate (panel) 1, prevent test plate (panel) 1 when welding from play occurs.
The side wall of two grooves 15 offers thermometer hole 12, and thermocouple, thermocouple and outside are equipped in thermometer hole 12 Temperature monitoring device electrical connection, thermocouple are specially K- type thermocouple, and temperature-measuring range is -100~600 DEG C.
A method of 7 line aluminium alloy friction stir welding performances are improved, are stirred using a kind of 7 line aluminium alloys of aforementioned raising Mix the device of friction welding joint performance, which comprises the steps of:
Step 1: the heavy plate 10 of two water-coolings is respectively placed in the groove 15 of 9 two sides of bottom liner plate, two water coolings dissipate The position of heat sink plate 10 respectively corresponds the position of 1 weld seam two sides heat affected area of test plate (panel), and the length and width dimensions of groove 15 are slightly larger than water cooling The length and width dimensions of heat sink plate 10 are dissipated, upper surface bottom 9 upper surfaces of liner plate of the heavy plate 10 of water-cooling are concordant, by two water-coolings Heavy plate 10 is connected to rubber hose, and the first water inlet 13 and the first water outlet 11 are connected with Cool-water Machine for Industry respectively;
Step 2: carrying out mechanical grinding processing for the interface of two pieces of test plate (panel)s 1 to be welded, remove surface oxide layer, so that Metallic luster is exposed in 1 end face of test plate (panel), and cleans surface with acetone, air-dries spare;
Step 3: being placed in the top of bottom liner plate 9 for two pieces of test plate (panel)s 1, and the butted lines of two test plate (panel)s 1 is symmetrical with grooves on two sides 15 Two water-cooling pressing plates 3, are respectively placed in the upper surface of two pieces of test plate (panel)s 1 by overlapping of axles, and two, top water-cooling pressing plate 3 is distinguished It is corresponding with heavy 10 position of plate of the water-cooling of lower part two, two water-cooling pressing plates 3 rubber hose is connected to, second enters water Mouth 5 and the second water outlet 4 are connected with Cool-water Machine for Industry respectively;
Step 4: erecting and welding fixture makes fixture cover board 6 be pressed in 3 top of water-cooling pressing plate, to fix test plate (panel) 1, avoids Test plate (panel) 1 loosens in the welding process;
Step 5: two thermocouples being inserted into respectively in the thermometer hole 12 of 15 side-walls of grooves on two sides, and with fine aluminium item Thermocouple is fixed, thermocouple is avoided to fall off in the welding process;
Step 6: industry cooling water dispenser is opened, and sets the temperature of recirculated cooling water, opens the water inlet of industry cooling water dispenser Valve and outlet valve are passed through cooling water into water-cooling pressing plate 3 and the heavy plate 10 of water-cooling, and the temperature for monitoring two thermocouples is surveyed Curve is tried, after temperature curve is stablized, starts to be stirred friction welding.
In the present embodiment, test plate (panel) 1 specifically selects the 7N01-T5 aluminum alloy plate materials of 10mm thickness, carries out FSW butt welding, industry Cooling water machine set temperature is 0 DEG C, when the measurement temperature curve of thermocouple is kept stable at 0 DEG C, starts agitating friction Welding.
It is 1200r/min that Friction Stir Welding parameter, which is 2 revolution of stirring-head, travel speed 80mm/min, and mixing needle inclines Rake angle is 2.5 °, drafts 0.2mm, and mixing needle length is 9.8mm, and shaft shoulder diameter is 22mm.After the completion of welding, to test plate (panel) 1 interception tensile sample, every group of sample are 3 parallel samples, and Tensile Test Results are the average value of 3 groups of samples, and comparison discovery is adopted With Local cooling, the yield strength and fracture elongation of connector are slightly improved, and tensile strength improves 25.6Mpa, see the table below.
The hardness curve of the cross section of connector compares discovery, as shown in figure 4, the hardness of convention stir friction welding joint is allusion quotation " W " type of type, heat affected area is there are obvious softened zone, and softened zone hardness is 66HV, and the softened zone hardness of Local cooling connector It is significantly improved for 75HV, and spacing becomes smaller;Tem observation is carried out to the heat affected area of conventional and local cooling samples, such as Fig. 5 and figure Shown in 6, it is found that the roughening situation of Local cooling sample η precipitated phase significantly reduces, so leading to the hardness and mechanical property of connector Raising.
Embodiment 2
A kind of device and method improving 7 line aluminium alloy friction stir welding performances, apparatus structure and the side used Method is same as Example 1, the difference is that the present embodiment carries out FSW butt welding, cooling water setting to 6mm 7075-T6 aluminium alloy Temperature is -5 DEG C, and welding condition is that 2 revolution of stirring-head is 1200r/min, travel speed 40mm/min, mixing needle inclination Angle is 2.5 °, drafts 0.2mm, and mixing needle length is 5.8mm, and shaft shoulder diameter is 16mm.The tensile property of connector is as follows Shown in table, the tensile strength of cooling samples improves 31.4MPa.
As described above, the plan content given by conjunction with the accompanying drawings and embodiments, can derive similar technical method.It is right It can use the mechanical property that the device and method improve connector in other heat-treatable strengthened aluminum alloys;According to the present invention Technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within technical solution of the present invention In the range of.

Claims (9)

1. a kind of device for improving 7 line aluminium alloy friction stir welding performances, which is characterized in that described device includes bottom lining Plate, test plate (panel) and water-cooling plate, for placing test plate (panel) to be welded, the two sides up and down of test plate (panel) are provided at the top of bottom liner plate Water-cooling plate, the position of water-cooling plate respectively correspond the heat affected area at left and right sides of weld seam, and the two sides of bottom liner plate are also set It is equipped with the welding fixture for fixing test plate (panel), is provided with stirring-head above position while welding.
2. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 1, feature exist It include being set to the water-cooling of test plate (panel) bottom to sink plate and the water-cooling pressing plate that is set at the top of test plate (panel) in, water-cooling plate, It is opened up at the top of the liner plate of bottom there are two groove, two grooves are arranged in parallel, are respectively arranged in two grooves and mutually fit with its size The upper surface of the heavy plate of the water-cooling matched, the heavy plate of water-cooling is concordant with bottom liner plate upper surface, the heavy plate point of two water-coolings Not Wei Yu at left and right sides of test plate (panel) weld seam heat affected area lower section, there are two water-cooling pressing plates for setting at the top of test plate (panel), are located at At left and right sides of weld seam, two water-cooling pressing plates are corresponding with the heavy Board position of the water-cooling of the lower part of test plate (panel) two respectively.
3. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 2, feature exist It sinks in, two water-coolings and is provided with cavity in plate, two water-coolings sink the cavity of plate and are connected to by rubber hose, left side Water-cooling sink plate and be provided with the first water outlet, the water-cooling on right side sinks plate and is provided with the first water inlet;
Cavity is provided in two water-cooling pressing plates, the cavity of two water-cooling pressing plates is connected to by rubber hose, left The water-cooling pressing plate of side is provided with the second water outlet, and the water-cooling pressing plate on right side is provided with the second water inlet, and first enters water Mouthful and the second water inlet be connected to the outlet valve of external industrial cooling water machine, the first water outlet and the second water outlet with it is outer The inlet valve of portion's industry cooling water dispenser is connected to.
4. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 3, feature exist In, the welding fixture is provided with two sets, centered on the liner plate of bottom be symmetrical arranged comprising fixture cover board, fixture bolt and Fixture backing plate, bottom liner plate lower surface are connected with workbench, and fixture backing plate is securely fitted in the upper surface of workbench, fixture It is overlapped at the top of one end of cover board and fixture backing plate, the other end of fixture cover board and the top of water-cooling pressing plate overlap, fixture spiral shell Bolt runs through in the middle part of fixture cover board vertically and is spirally connected with workbench.
5. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 4, feature exist In the side wall of two grooves offers thermometer hole, and thermocouple, thermocouple and external temperature monitoring device are equipped in thermometer hole Electrical connection.
6. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 5, feature exist In between water-cooling plate and weld seam at intervals, defining the distance is L, 2mm≤L≤5mm.
7. a kind of device for improving 7 line aluminium alloy friction stir welding performances according to claim 6, feature exist In L is specially 2mm.
8. a kind of method for improving 7 line aluminium alloy friction stir welding performances improves 7 using a kind of as claimed in claim 5 The device of line aluminium alloy friction stir welding performance, which comprises the steps of:
Step 1: the heavy plate of two water-coolings is respectively placed in the groove of bottom liner plate two sides, the heavy plate of two water-coolings Position respectively corresponds the position of test plate (panel) weld seam two sides heat affected area, and the length and width dimensions of groove are slightly larger than the length and width of the heavy plate of water-cooling The upper surface bottom liner plate upper surface of size, the heavy plate of water-cooling is concordant, and the heavy plate rubber hose of two water-coolings is connected to, First water inlet and the first water outlet are connected with Cool-water Machine for Industry respectively;
Step 2: the interface of two pieces of test plate (panel)s to be welded is subjected to mechanical grinding processing, surface oxide layer is removed, so that test plate (panel) end Metallic luster is showed out, and cleans surface with acetone, is air-dried spare;
Step 3: two pieces of test plate (panel)s are placed at the top of the liner plate of bottom, the butted line of two test plate (panel)s and the symmetrical overlapping of axles of grooves on two sides, will Two water-cooling pressing plates are respectively placed in the upper surface of two pieces of test plate (panel)s, two, top water-cooling pressing plate respectively with the water of lower part two The cold heavy Board position that radiates is corresponding, two water-cooling pressing plates rubber hose is connected to, the second water inlet and the second water outlet It is connected respectively with Cool-water Machine for Industry;
Step 4: erecting and welding fixture is pressed in fixture cover board at the top of water-cooling pressing plate, to fix test plate (panel);
Step 5: two thermocouples are inserted into respectively in the thermometer hole of grooves on two sides side-walls, and with fine aluminium item by thermocouple It is fixed;
Step 6: industry cooling water dispenser is opened, and sets the temperature of recirculated cooling water, open industry cooling water dispenser inlet valve and Outlet valve is passed through cooling water into water-cooling pressing plate and the heavy plate of water-cooling, monitors the temperature test curve of two thermocouples, After temperature curve is stablized, start to be stirred friction welding.
9. a kind of method for improving 7 line aluminium alloy friction stir welding performances according to claim 8, feature exist In the set temperature of industrial colling is -30~20 DEG C in the step 6.
CN201811546981.4A 2018-12-18 2018-12-18 A kind of device and method improving 7 line aluminium alloy friction stir welding performances Pending CN109623132A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN111168224A (en) * 2020-01-09 2020-05-19 卢秀丽 Molecular staggered type seamless welding machine equipment
CN112108755A (en) * 2020-08-28 2020-12-22 华南理工大学 Combined process method for underwater friction stir welding and postweld heat treatment
CN112453654A (en) * 2020-11-18 2021-03-09 内蒙古第一机械集团股份有限公司 Automatic welding device and method for thin-wall aluminum alloy oil tank circumferential weld with low deformation

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CN204148777U (en) * 2014-10-09 2015-02-11 长春轨道客车装备有限责任公司 Steel moald-cavity sleeper beam manipulator weld jig
CN205290183U (en) * 2015-12-01 2016-06-08 重庆大东汽车配件有限公司 Minibus welding jig pressure arm formula clamping device
CN105899320A (en) * 2014-01-20 2016-08-24 通用汽车环球科技运作有限责任公司 Welding method and system

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Publication number Priority date Publication date Assignee Title
CN103639588A (en) * 2013-11-11 2014-03-19 江苏科技大学 Solid state heat sink device used for friction stir welding and welding method of solid state heat sink device
CN105899320A (en) * 2014-01-20 2016-08-24 通用汽车环球科技运作有限责任公司 Welding method and system
CN204148777U (en) * 2014-10-09 2015-02-11 长春轨道客车装备有限责任公司 Steel moald-cavity sleeper beam manipulator weld jig
CN205290183U (en) * 2015-12-01 2016-06-08 重庆大东汽车配件有限公司 Minibus welding jig pressure arm formula clamping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168224A (en) * 2020-01-09 2020-05-19 卢秀丽 Molecular staggered type seamless welding machine equipment
CN112108755A (en) * 2020-08-28 2020-12-22 华南理工大学 Combined process method for underwater friction stir welding and postweld heat treatment
CN112453654A (en) * 2020-11-18 2021-03-09 内蒙古第一机械集团股份有限公司 Automatic welding device and method for thin-wall aluminum alloy oil tank circumferential weld with low deformation

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