CN108161353B - A kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance - Google Patents
A kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance Download PDFInfo
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- CN108161353B CN108161353B CN201711421228.8A CN201711421228A CN108161353B CN 108161353 B CN108161353 B CN 108161353B CN 201711421228 A CN201711421228 A CN 201711421228A CN 108161353 B CN108161353 B CN 108161353B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
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Abstract
A kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance, it is related to a kind of manufacturing process of aluminium alloy tailor welded end socket.The invention aims to solve the problems, such as to obtain aluminium alloy tailor welded end socket by existing monolithic molding, there are wall thickness and mechanical property distribution are non-uniform.Method: one, Friction Stir Welding；Two, local bulging, obtains prefabricated component；Three, it is heat-treated；Four, hydro-mechanical drawing mould is secondary forming, obtains forming rear head；Five, solution treatment obtains large aluminum alloy tailor welded end socket.Advantage: the large aluminum alloy tailor welded end socket wall thickness and mechanical property of forming are uniform, and thickness distribution is poor≤and 10%, intensity distribution difference≤30MPa.Present invention is mainly used for the monolithic moldings of the uniform large aluminum alloy tailor welded end socket of performance.
Description
Technical field
The present invention relates to a kind of manufacturing process of aluminium alloy tailor welded end socket.
Background technique
End socket is widely used in the manufacture of large container in fields such as aerospace, petrochemical industries, due to its opening diameter
Usually at 2 meters or more, welding is formed after current manufacturing method generallys use multiple curved surface valve assemblings.End socket is as large container
Important component, bear complex loads, the manufacturer's standard such as internal pressure, vibration and impact and require its structure property uniformity, thus
Meet the military service performance requirement of large-scale plant.However, the intensity of traditional welding construction joint only has the 70% of base material, plasticity only has
The 30% of base material, cause end socket integral strength and toughness to decline, welding residual stress it is big, become the principal element for leading to failure；
In addition, the forming of curved surface valve has deformation unevenness, mechanical heterogeneity is caused after heat treatment, is partially below when serious
Design requirement.
Fundamentally to improve the performance uniformity of end socket, it is necessary to using the system of monolithic molding technical substitution tradition welding
Make mode.Since aluminium alloy temperature-room type plasticity is lower, whole plate is placed in 200 DEG C~400 DEG C of item by a kind of integral forming method
1h~2h is heated under part, whole plate is fitted into mold after heating and carries out hot deep drawing, and forming temperature is 150 DEG C~300
℃.Since to be placed in thermal losses in mold very fast for plate, this method forming temperature is caused to be difficult to accurately control；Hot drawing mistake simultaneously
The problems such as Cheng Fasheng dynamic recovery and recrystalline, abnormal grain growth, structure property decline, seriously affect the tissue of integrated head
Performance uniformity.In recent years, plate hydro-mechanical drawing technology is used for the forming of the large complicated carved part such as automobile panel, is
Realize large-sized end enclosure advanced forming technique made in one piece.However, since existing aluminium alloy plate is wide generally in 2.5m or so, it cannot
Billet size requirement needed for meeting monolithic molding, monolithic molding still need to the plate blank of welding.Due to weld seam and base material tissue
The uneven deformation of weld seam and base material, it is integrally formed feasible to constrain tailor welded when the intrinsic difference and monolithic molding of performance
Property, exacerbate the problem of integrated head structure property unevenness.
Summary of the invention
The invention aims to solve existing monolithic molding to obtain aluminium alloy tailor welded end socket there are wall thickness and mechanical property
The problem of capable of being unevenly distributed, and a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance is provided.
A kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance, is specifically realized by the following steps
:
One, Friction Stir Welding: use welding forward speed for 200mm/min~400mm/min, rotation speed is
The friction stir welding method of 800rpm~1000rpm prepares large aluminum alloy tailor welded, the large aluminum alloy tailor welded
Width >=4000mm；
Two, local bulging: local bulging is carried out to large aluminum alloy tailor welded using local pre-expanding mold, the part is pre-
Swollen mold includes local bulging die, pre-expanding cavity plate and liquid-filled chamber, and cylindrical cavity, and the cylinder of liquid-filled chamber are equipped in liquid-filled chamber
Inner cavity is connected to by liquid injection hole with the liquid medium chamber of hydraulic system, pre-expanding cavity plate in a ring, and circular inside diameters of pre-expanding cavity plate
The diameter of≤cylindrical cavity, local bulging die are equipped with dome-shaped die cavity, and dome-shaped die cavity end face round diameter is less than Large size Aluminium
The distance between adjacent two weld seams on alloy tailor welded, the part that large aluminum alloy tailor welded is put into local pre-expanding mold is swollen
Between shape mould and pre-expanding cavity plate, and guarantee that the weld seam of large aluminum alloy tailor welded is located at outside dome-shaped die cavity, local pre-expanding mold
Liquid medium intracavity liquid medium is passed through note using hydraulic system by the unit area pressure-pad-force for molding and applying 3MPa~5MPa
Fluid apertures is injected in liquid-filled chamber, is made hydraulically full medium in liquid-filled chamber, is continued to be pressurized to 5MPa~10MPa using hydraulic system,
Fluid pressure is so that large aluminum alloy tailor welded is clinged to the dome-shaped die cavity of local bulging die completely under 5MPa~10MPa, is obtained
To prefabricated component；
Three, it is heat-treated: prefabricated component being put into heat-treatment furnace, is heat-treated at 250 DEG C~350 DEG C of temperature, when heat treatment
Between be 1h~2h, 200 DEG C of taking-ups are then furnace-cooled to 30 DEG C/h~50 DEG C/h cooling rate, then be air-cooled to room temperature, obtain heat
Treated prefabricated component；
Four, secondary deformation: secondary deformation is carried out to the prefabricated component after heat treatment using hydro-mechanical drawing mold, the filling liquid is drawn
Deep mold includes punch-pin, blank holder, secondary deformation cavity plate and hydro-mechanical drawing room, and cylindrical sap cavity is equipped in hydro-mechanical drawing room, and
The cylindrical sap cavity of hydro-mechanical drawing room is connected to by filling liquid hole with the liquid medium chamber of hydraulic system, and secondary deformation cavity plate is in ring
Shape, and the circular inside diameters of secondary deformation cavity plate≤cylinder sap cavity diameter, blank holder in a ring, and circular inside diameters of blank holder
It is equal with the circular inside diameters of secondary deformation cavity plate, punch-pin, and punch-pin are designed according to large aluminum alloy tailor welded end socket actual size
The circular inside diameters of the circular diameter≤blank holder in outer will be put into the pressure of hydro-mechanical drawing mold after the prefabricated component overturning after heat treatment
Between flange and secondary deformation cavity plate, hydro-mechanical drawing mold clamping and the unit area pressure-pad-force for applying 3MPa~5MPa are utilized
Hydraulic system injects liquid medium intracavity liquid medium in hydro-mechanical drawing room by filling liquid hole, makes in hydro-mechanical drawing room full of liquid
Body medium continues to be pressurized to 10MPa~20MPa using hydraulic system, in the case where fluid pressure is 10MPa~20MPa lower punch (4)
The prefabricated component moved after making heat treatment carries out secondary deformation, obtains forming rear head；
Five, solution treatment: rear head solution treatment at 500 DEG C~540 DEG C of temperature will be shaped, the solution treatment time is
0.5h~1h, water quenching after taking-up, then at 160 DEG C~180 DEG C of temperature artificial aging handle, artificial aging processing the time be
10h~48h, taking-up are air-cooled to room temperature, obtain large aluminum alloy tailor welded end socket.
The principle of the present invention and advantage:
One, the present invention uses Friction Stir Welding: the Friction Stir Welding technology solid phase joining technique novel as one kind,
The deficiency that the welding methods such as melting welding are also easy to produce stomata and crackle is overcome, the high strength alumin ium alloys such as Aeronautics and Astronautics, rail traffic are become
The new welding technique of material, joint quality and performance are substantially better than traditional welding method, obtain in terms of aluminum alloy piping welding
A large amount of practical applications achieve satisfied application effect.
Two, the present invention is different from using integral drawing of tailor welded and a liquid filling deep-drawing forming method, welding point
Under the tensile stress state extremely harsh in stress, since the deformability difference of weld seam and base material is big, weld seam is caused to be answered in drawing
Biggish stress is formed under power to concentrate, and easily causes to crack or deform uneven since deformability is insufficient；The present invention is utilized and is stirred
The aluminium alloy tailor welded structure property difference of friction welding preparation is mixed, i.e. the intensity in base material area is lower than weld metal zone, but base material area
Elongation percentage is higher than the characteristic of weld metal zone, and the present invention first uses hydroforming to carry out first time forming, and non-weld metal zone plate occurs
Local bulging (even if base material area preferentially deforms), welding point is in Bulging Process not to be occurred between blank holder and cavity plate
Deformation, then makes the structure property of base material area and weld metal zone reach unanimity by intermediate heat-treatment, then uses hydro-mechanical drawing mould two
Secondary forming makes the base material area of prefabricated component and weld metal zone while deforming, while obtaining aluminium alloy tailor welded integrated head, makes
The structure property of integrated head reaches uniformly, and is conducive to keep plate inflow in flange recessed using hydraulic and punch-pin drawing and forming
Mould reduces weld metal zone tensile stress, improves the feasibility of forming and the uniformity of deformation.
Three, it is further mentioned using the deformation precipitation strength mechanism that solution treatment and artificial aging processing can use aluminium alloy
The mechanical property of high integrated head.
Four, uniform using the large aluminum alloy tailor welded end socket wall thickness of the invention shaped and mechanical property, thickness distribution is poor
≤ 10%, intensity distribution difference≤30MPa.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pre-expanding mold in part described in specific embodiment one；The local bulging die of 1 expression in figure, 2
Indicate pre-expanding cavity plate, 3 indicate that liquid-filled chamber, 1-1 indicate that dome-shaped die cavity, 3-1 indicate that cylindrical cavity, 3-2 indicate liquid injection hole；
Fig. 2 is Bulging Process schematic diagram in part described in specific embodiment one；1 indicates local bulging die in figure, and 2 indicate pre-
Swollen cavity plate, 3 indicate that liquid-filled chamber, 3-1 indicate that cylindrical cavity, 3-2 indicate liquid injection hole；
Fig. 3 is the structural schematic diagram of hydro-mechanical drawing mold described in specific embodiment one；4 indicate punch-pin in figure, and 5 indicate pressure
Flange, 6 indicate secondary deformation cavity plate, and 7 indicate hydro-mechanical drawing room, and 7-1 indicates that cylindrical sap cavity, 7-2 indicate filling liquid hole；
Fig. 4 is the secondary forming process schematic of hydro-mechanical drawing mould described in specific embodiment one；4 indicate punch-pin, 5 tables in figure
Show blank holder, 6 indicate secondary deformation cavity plate, and 7 indicate hydro-mechanical drawing room, and 7-1 indicates that cylindrical sap cavity, 7-2 indicate filling liquid hole.
Specific embodiment
Specific embodiment 1: present embodiment is a kind of uniform large aluminum alloy tailor welded of performance in conjunction with Fig. 1 to 4
The integrally formed method of end socket, it is completed by the following steps:
One, Friction Stir Welding: use welding forward speed for 200mm/min~400mm/min, rotation speed is
The friction stir welding method of 800rpm~1000rpm prepares large aluminum alloy tailor welded, the large aluminum alloy tailor welded
Width >=4000mm；
Two, local bulging: local bulging is carried out to large aluminum alloy tailor welded using local pre-expanding mold, the part is pre-
Swollen mold includes local bulging die 1, pre-expanding cavity plate 2 and liquid-filled chamber 3, and cylindrical cavity 3-1, and liquid-filled chamber 3 are equipped in liquid-filled chamber 3
Cylindrical cavity 3-1 be connected to the liquid medium chamber of hydraulic system by liquid injection hole 3-2, pre-expanding cavity plate 2 in a ring, and pre-expanding
The circular inside diameters of cavity plate 2≤cylindrical cavity 3-1 diameter, local bulging die 1 are equipped with dome-shaped die cavity 1-1, dome-shaped die cavity
The end face 1-1 round diameter is less than the distance between adjacent two weld seams on large aluminum alloy tailor welded, by large aluminum alloy welding
Plate is put between the local bulging die 1 and pre-expanding cavity plate 2 of local pre-expanding mold, and guarantees the weld seam position of large aluminum alloy tailor welded
In outside dome-shaped die cavity 1-1, local pre-expanding mold clamping and the unit area pressure-pad-force for applying 3MPa~5MPa utilize hydraulic pressure system
System injects liquid medium intracavity liquid medium in liquid-filled chamber 3 by liquid injection hole 3-2, makes hydraulically full medium in liquid-filled chamber 3, benefit
Continued to be pressurized to 5MPa~10MPa with hydraulic system, keeps large aluminum alloy tailor welded complete in the case where fluid pressure is 5MPa~10MPa
The dome-shaped die cavity 1-1 for clinging to local bulging die entirely, obtains prefabricated component；
Three, it is heat-treated: prefabricated component being put into heat-treatment furnace, is heat-treated at 250 DEG C~350 DEG C of temperature, when heat treatment
Between be 1h~2h, 200 DEG C of taking-ups are then furnace-cooled to 30 DEG C/h~50 DEG C/h cooling rate, then be air-cooled to room temperature, obtain heat
Treated prefabricated component；
Four, secondary deformation: secondary deformation is carried out to the prefabricated component after heat treatment using hydro-mechanical drawing mold, the filling liquid is drawn
Deep mold includes punch-pin 4, blank holder 5, secondary deformation cavity plate 6 and hydro-mechanical drawing room 7, and cylindrical liquid is equipped in hydro-mechanical drawing room 7
Chamber 7-1, and the cylindrical sap cavity 7-1 of hydro-mechanical drawing room 7 is connected to by filling liquid hole 7-2 with the liquid medium chamber of hydraulic system, two
In a ring, and the circular inside diameters of secondary deformation cavity plate 6≤cylinder sap cavity 7-1 diameter, blank holder 5 is in ring to secondary deformation cavity plate 6
Shape, and the circular inside diameters of blank holder 5 are equal with the circular inside diameters of secondary deformation cavity plate 6, according to large aluminum alloy tailor welded end socket
Actual size designs punch-pin 4, and the circular inside diameters of the circular diameter≤blank holder 5 in 4 outer of punch-pin, by the prefabricated component after heat treatment
It is put into after overturning between the blank holder 5 of hydro-mechanical drawing mold and secondary deformation cavity plate 6, hydro-mechanical drawing mold clamping simultaneously applies 3MPa
The unit area pressure-pad-force of~5MPa is filled liquid medium intracavity liquid medium by filling liquid hole 7-2 injection using hydraulic system
In liquid drawing room 7, makes hydraulically full medium in hydro-mechanical drawing room 7, continue to be pressurized to 10MPa~20MPa using hydraulic system,
Fluid pressure is that 10MPa~20MPa lower punch 4 moves down the prefabricated component progress secondary deformation after making heat treatment, is sealed after being shaped
Head；
Five, solution treatment: rear head solution treatment at 500 DEG C~540 DEG C of temperature will be shaped, the solution treatment time is
0.5h~1h, water quenching after taking-up, then at 160 DEG C~180 DEG C of temperature artificial aging handle, artificial aging processing the time be
10h~48h, taking-up are air-cooled to room temperature, obtain large aluminum alloy tailor welded end socket.
Specific embodiment 2: the difference of present embodiment and specific embodiment one is: setting Large size Aluminium in step 2
The inner end diameter of alloy tailor welded end socket is A, and the spacing of adjacent weld seam is B on large aluminum alloy tailor welded, as A-B > 2500mm
When, in the two sides dome-shaped die cavity 1-1 of local bulging die 1, two auxiliary die cavitys, two auxiliary die cavity outer distance H≤big are set
The inner end diameter A of type aluminium alloy tailor welded end socket, if the width of weld seam platform is h between dome-shaped die cavity 1-1 and auxiliary die cavity,
The weld width of large aluminum alloy tailor welded is b, then h >=2b；Large aluminum alloy tailor welded is put into the office of local pre-expanding mold
Between portion's bulging die 1 and pre-expanding cavity plate 2, and guarantee that the weld seam of large aluminum alloy tailor welded is located at weld seam platform.Other and tool
Body embodiment one is identical.
Specific embodiment 3: one of present embodiment and specific embodiment one or two difference are: being adopted in step 1
It is 200mm/min with welding forward speed, the friction stir welding method that rotation speed is 800rpm prepares large aluminum alloy spelling
Welding plate.Other are the same as one or two specific embodiments.
Specific embodiment 4: one of present embodiment and specific embodiment one to three difference are: being adopted in step 1
It is 300mm/min with welding forward speed, the friction stir welding method that rotation speed is 800rpm prepares large aluminum alloy spelling
Welding plate.Other are identical as specific embodiment one to three.
Specific embodiment 5: one of present embodiment and specific embodiment one to four difference are: being adopted in step 1
It is 300mm/min with welding forward speed, the friction stir welding method that rotation speed is 1000rpm prepares large aluminum alloy spelling
Welding plate.Other are identical as specific embodiment one to four.
Specific embodiment 6: one of present embodiment and specific embodiment one to five difference are: being adopted in step 1
It is 400mm/min with welding forward speed, the friction stir welding method that rotation speed is 800rpm prepares large aluminum alloy spelling
Welding plate.Other are identical as specific embodiment one to five.
Specific embodiment 7: one of present embodiment and specific embodiment one to six difference are: in step 3
It is heat-treated at 300 DEG C of temperature, heat treatment time 2h.Other are identical as specific embodiment one to six.
Specific embodiment 8: one of present embodiment and specific embodiment one to seven difference are: will in step 5
Forming forming rear head solution treatment at 535 DEG C of temperature, solution treatment time are 1h.Other and specific embodiment one to seven
It is identical.
Specific embodiment 9: one of present embodiment and specific embodiment one to eight difference are: in step 5
Artificial aging is handled at 175 DEG C of temperature, and artificial aging handles the time as 18h.Other are identical as specific embodiment one to eight.
The content of present invention is not limited only to the content of the respective embodiments described above, the group of one of them or several specific embodiments
The purpose of invention also may be implemented in contract sample.
Using following verification experimental verifications effect of the present invention:
Embodiment 1: a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance is utilized, according to large size
The end socket diameter of aluminium alloy tailor welded end socket is 2250mm, and a height of 700mm is specifically realized by the following steps with a thickness of 6mm
:
One, Friction Stir Welding: using welding forward speed for 200mm/min, and rotation speed is that the stirring of 1000rpm rubs
It wipes welding method and prepares large aluminum alloy tailor welded；The material of the large aluminum alloy tailor welded is 2A14 aluminium alloy；
Two, local bulging: local bulging is carried out to large aluminum alloy tailor welded using local pre-expanding mold, the part is pre-
Swollen mold includes local bulging die 1, pre-expanding cavity plate 2 and liquid-filled chamber 3, and cylindrical cavity 3-1, and liquid-filled chamber 3 are equipped in liquid-filled chamber 3
Cylindrical cavity 3-1 be connected to the liquid medium chamber of hydraulic system by liquid injection hole 3-2, pre-expanding cavity plate 2 in a ring, and pre-expanding
The circular inside diameters of cavity plate 2≤cylindrical cavity 3-1 diameter, local bulging die 1 are equipped with dome-shaped die cavity 1-1, dome-shaped die cavity
The end face 1-1 round diameter is less than the distance between adjacent two weld seams on large aluminum alloy tailor welded, by large aluminum alloy welding
Plate is put between the local bulging die 1 and pre-expanding cavity plate 2 of local pre-expanding mold, and guarantees the weld seam position of large aluminum alloy tailor welded
In outside dome-shaped die cavity 1-1, local pre-expanding mold clamping and the unit area pressure-pad-force for applying 3MPa, using hydraulic system by liquid
Liquid medium is injected in liquid-filled chamber 3 by liquid injection hole 3-2 in body dielectric cavity, keeps hydraulically full medium, utilization in liquid-filled chamber 3 hydraulic
System continues to be pressurized to 5MPa, so that large aluminum alloy tailor welded is clinged to local bulging die completely in the case where fluid pressure is 5MPa
Dome-shaped die cavity 1-1, obtains prefabricated component；
Three, it is heat-treated: prefabricated component being put into heat-treatment furnace, is heat-treated at 300 DEG C of temperature, heat treatment time 2h,
Then 200 DEG C of taking-ups are furnace-cooled to the cooling rate of 40 DEG C/h, then are air-cooled to room temperature, the prefabricated component after being heat-treated；
Four, secondary deformation: secondary deformation is carried out to the prefabricated component after heat treatment using hydro-mechanical drawing mold, the filling liquid is drawn
Deep mold includes punch-pin 4, blank holder 5, secondary deformation cavity plate 6 and hydro-mechanical drawing room 7, and cylindrical liquid is equipped in hydro-mechanical drawing room 7
Chamber 7-1, and the cylindrical sap cavity 7-1 of hydro-mechanical drawing room 7 is connected to by filling liquid hole 7-2 with the liquid medium chamber of hydraulic system, two
In a ring, and the circular inside diameters of secondary deformation cavity plate 6≤cylinder sap cavity 7-1 diameter, blank holder 5 is in ring to secondary deformation cavity plate 6
Shape, and the circular inside diameters of blank holder 5 are equal with the circular inside diameters of secondary deformation cavity plate 6, according to large aluminum alloy tailor welded end socket
Actual size designs punch-pin 4, and the circular inside diameters of the circular diameter≤blank holder 5 in 4 outer of punch-pin, by the prefabricated component after heat treatment
It is put into after overturning between the blank holder 5 of hydro-mechanical drawing mold and secondary deformation cavity plate 6, hydro-mechanical drawing mold clamping simultaneously applies 5MPa
Unit area pressure-pad-force, using hydraulic system by liquid medium intracavity liquid medium by filling liquid hole 7-2 inject hydro-mechanical drawing
In room 7, make hydraulically full medium in hydro-mechanical drawing room 7, continue to be pressurized to 20MPa using hydraulic system, is in fluid pressure
20MPa lower punch 4 moves down the prefabricated component after making heat treatment and carries out secondary deformation, obtains forming rear head；
Five, solution treatment: will shape rear head solution treatment at 500 DEG C of temperature, and the solution treatment time is 0.5h, take out
Water quenching afterwards, then artificial aging is handled at 170 DEG C of temperature, and artificial aging handles the time as 10h, and taking-up is air-cooled to room temperature, is obtained
To large aluminum alloy tailor welded end socket.
The thickness distribution for the large aluminum alloy tailor welded end socket that embodiment 1 obtains is 6mm ± 0.6mm, mechanical property distribution
For 450MPa ± 10MPa.
Embodiment 2: a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance is closed according to Large size Aluminium
The end socket diameter of golden tailor welded end socket is 3350mm, and a height of 900mm is specifically realized by the following steps with a thickness of 8mm:
One, Friction Stir Welding: using welding forward speed for 300mm/min, and rotation speed is that the stirring of 800rpm rubs
It wipes welding method and prepares large aluminum alloy tailor welded；
Two, local bulging: local bulging is carried out to large aluminum alloy tailor welded using local pre-expanding mold, the part is pre-
Swollen mold includes local bulging die 1, pre-expanding cavity plate 2 and liquid-filled chamber 3, and cylindrical cavity 3-1, and liquid-filled chamber 3 are equipped in liquid-filled chamber 3
Cylindrical cavity 3-1 be connected to the liquid medium chamber of hydraulic system by liquid injection hole 3-2, pre-expanding cavity plate 2 in a ring, and pre-expanding
The circular inside diameters of cavity plate 2≤cylindrical cavity 3-1 diameter, local bulging die 1 are equipped with dome-shaped die cavity 1-1, dome-shaped die cavity
The end face 1-1 round diameter is less than the distance between adjacent two weld seams on large aluminum alloy tailor welded, by large aluminum alloy welding
Plate is put between the local bulging die 1 and pre-expanding cavity plate 2 of local pre-expanding mold, and guarantees the weld seam position of large aluminum alloy tailor welded
In outside dome-shaped die cavity 1-1, local pre-expanding mold clamping and the unit area pressure-pad-force for applying 5MPa, using hydraulic system by liquid
Liquid medium is injected in liquid-filled chamber 3 by liquid injection hole 3-2 in body dielectric cavity, keeps hydraulically full medium, utilization in liquid-filled chamber 3 hydraulic
System continues to be pressurized to 5MPa, so that large aluminum alloy tailor welded is clinged to local bulging die completely in the case where fluid pressure is 5MPa
Dome-shaped die cavity 1-1, obtains prefabricated component；
Three, it is heat-treated: prefabricated component being put into heat-treatment furnace, is heat-treated at 300 DEG C of temperature, heat treatment time 2h,
Then 200 DEG C of taking-ups are furnace-cooled to the cooling rate of 450 DEG C/h, then are air-cooled to room temperature, the prefabricated component after being heat-treated；
Four, secondary deformation: secondary deformation is carried out to the prefabricated component after heat treatment using hydro-mechanical drawing mold, the filling liquid is drawn
Deep mold includes punch-pin 4, blank holder 5, secondary deformation cavity plate 6 and hydro-mechanical drawing room 7, and cylindrical liquid is equipped in hydro-mechanical drawing room 7
Chamber 7-1, and the cylindrical sap cavity 7-1 of hydro-mechanical drawing room 7 is connected to by filling liquid hole 7-2 with the liquid medium chamber of hydraulic system, two
In a ring, and the circular inside diameters of secondary deformation cavity plate 6≤cylinder sap cavity 7-1 diameter, blank holder 5 is in ring to secondary deformation cavity plate 6
Shape, and the circular inside diameters of blank holder 5 are equal with the circular inside diameters of secondary deformation cavity plate 6, according to large aluminum alloy tailor welded end socket
Actual size designs punch-pin 4, and the circular inside diameters of the circular diameter≤blank holder 5 in 4 outer of punch-pin, by the prefabricated component after heat treatment
It is put into after overturning between the blank holder 5 of hydro-mechanical drawing mold and secondary deformation cavity plate 6, hydro-mechanical drawing mold clamping simultaneously applies 5MPa
Unit area pressure-pad-force, using hydraulic system by liquid medium intracavity liquid medium by filling liquid hole 7-2 inject hydro-mechanical drawing
In room 7, make hydraulically full medium in hydro-mechanical drawing room 7, continue to be pressurized to 12MPa using hydraulic system, is in fluid pressure
12MPa lower punch 4 moves down the prefabricated component after making heat treatment and carries out secondary deformation, obtains forming rear head；
Five, solution treatment: rear head solution treatment at 535 DEG C of temperature will be shaped, the solution treatment time is 1h, after taking-up
Water quenching, then artificial aging is handled at 175 DEG C of temperature, and artificial aging handles the time as 18h, and taking-up is air-cooled to room temperature, is obtained
Large aluminum alloy tailor welded end socket.
The Thickness Distribution of the end socket for the large aluminum alloy tailor welded end socket that embodiment 2 obtains is 6.8mm~8.5mm, tension
Intensity distribution is 440MPa ± 15MPa, improves 13% than 2219 aluminium alloy aging state plate tensile strength.
Claims (9)
1. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance, it is characterised in that a kind of performance is uniform
The integrally formed method of large aluminum alloy tailor welded end socket be completed by the following steps:
One, Friction Stir Welding: use welding forward speed for 200mm/min~400mm/min, rotation speed for 800rpm~
The friction stir welding method of 1000rpm prepares large aluminum alloy tailor welded, and the width of the large aluminum alloy tailor welded >=
4000mm；
Two, local bulging, the part pre-expanding mould local bulging: are carried out to large aluminum alloy tailor welded using local pre-expanding mold
Tool includes local bulging die (1), pre-expanding cavity plate (2) and liquid-filled chamber (3), is equipped with cylindrical cavity (3-1) in liquid-filled chamber (3), and
The cylindrical cavity (3-1) of liquid-filled chamber (3) is connected to by liquid injection hole (3-2) with the liquid medium chamber of hydraulic system, pre-expanding cavity plate
(2) in a ring, and the diameter of circular inside diameters≤cylindrical cavity (3-1) of pre-expanding cavity plate (2), local bulging die (1) are equipped with vault
Push up shape die cavity (1-1), dome-shaped die cavity (1-1) end face round diameter be less than large aluminum alloy tailor welded on adjacent two weld seams it
Between distance, large aluminum alloy tailor welded is put between the local bulging die (1) of local pre-expanding mold and pre-expanding cavity plate (2),
And guaranteeing that the weld seam of large aluminum alloy tailor welded is located at dome-shaped die cavity (1-1) outside, local pre-expanding mold clamping simultaneously applies 3MPa
The unit area pressure-pad-force of~5MPa is injected liquid medium intracavity liquid medium by liquid injection hole (3-2) using hydraulic system
In liquid-filled chamber (3), makes hydraulically full medium in liquid-filled chamber (3), continue to be pressurized to 5MPa~10MPa using hydraulic system, in liquid
Body pressure is the dome-shaped die cavity (1-1) for making large aluminum alloy tailor welded cling to local bulging die completely under 5MPa~10MPa,
Obtain prefabricated component；
Three, it is heat-treated: prefabricated component being put into heat-treatment furnace, is heat-treated at 250 DEG C~350 DEG C of temperature, heat treatment time is
Then 1h~2h is furnace-cooled to 200 DEG C of taking-ups with 30 DEG C/h~50 DEG C/h cooling rate, then is air-cooled to room temperature, be heat-treated
Prefabricated component afterwards；
Four, secondary deformation, the hydro-mechanical drawing mould secondary deformation: are carried out to the prefabricated component after heat treatment using hydro-mechanical drawing mold
Tool includes that punch-pin (4), blank holder (5), secondary deformation cavity plate (6) and hydro-mechanical drawing room (7), hydro-mechanical drawing room (7) interior be equipped with are justified
Cylindricality sap cavity (7-1), and the cylindrical sap cavity (7-1) of hydro-mechanical drawing room (7) passes through the liquid of filling liquid hole (7-2) and hydraulic system
Dielectric cavity connection, secondary deformation cavity plate (6) in a ring, and the circular inside diameters of secondary deformation cavity plate (6)≤cylinder sap cavity (7-1)
Diameter, in a ring, and the circular inside diameters of blank holder (5) are equal with the circular inside diameters of secondary deformation cavity plate (6) for blank holder (5),
Punch-pin (4) are designed according to large aluminum alloy tailor welded end socket actual size, and the circular diameter≤blank holder in punch-pin (4) outer
(5) circular inside diameters, blank holder (5) and secondary deformation that hydro-mechanical drawing mold is put into after the prefabricated component overturning after heat treatment is recessed
Between mould (6), hydro-mechanical drawing mold clamping and the unit area pressure-pad-force for applying 3MPa~5MPa, using hydraulic system by liquid
Liquid medium is by making hydraulically full in hydro-mechanical drawing room (7) in filling liquid hole (7-2) injection hydro-mechanical drawing room (7) in dielectric cavity
Medium continues to be pressurized to 10MPa~20MPa using hydraulic system, is that 10MPa~20MPa lower punch (4) move down in fluid pressure
Prefabricated component after making heat treatment carries out secondary deformation, obtains forming rear head；
Five, solution treatment: will shape rear head solution treatment at 500 DEG C~540 DEG C of temperature, the solution treatment time be 0.5h~
1h, water quenching after taking-up, then at 160 DEG C~180 DEG C of temperature artificial aging handle, artificial aging handle the time be 10h~
48h, taking-up are air-cooled to room temperature, obtain large aluminum alloy tailor welded end socket.
2. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
Be characterized in that the inner end diameter that large aluminum alloy tailor welded end socket is set in step 2 as A, adjacent weldering on large aluminum alloy tailor welded
The spacing of seam is B, and as A-B > 2500mm, two auxiliary are arranged in the dome-shaped die cavity two sides (1-1) of local bulging die (1)
Die cavity, two auxiliary die cavity outer distance H≤large aluminum alloy tailor welded end socket inner end diameter A, if dome-shaped die cavity (1-1)
The width of weld seam platform is h between auxiliary die cavity, and the weld width of large aluminum alloy tailor welded is b, then h >=2b；It will be large-scale
Aluminium alloy tailor welded is put between the local bulging die (1) of local pre-expanding mold and pre-expanding cavity plate (2), and guarantees large aluminum alloy
The weld seam of tailor welded is located at weld seam platform.
3. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that using welding forward speed for 200mm/min in step 1, rotation speed is the Friction Stir Welding side of 800rpm
Method prepares large aluminum alloy tailor welded.
4. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that using welding forward speed for 300mm/min in step 1, rotation speed is the Friction Stir Welding side of 800rpm
Method prepares large aluminum alloy tailor welded.
5. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that using welding forward speed for 300mm/min in step 1, rotation speed is the Friction Stir Welding side of 1000rpm
Method prepares large aluminum alloy tailor welded.
6. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that using welding forward speed for 400mm/min in step 1, rotation speed is the Friction Stir Welding side of 800rpm
Method prepares large aluminum alloy tailor welded.
7. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that in step 3 being heat-treated at 300 DEG C of temperature, heat treatment time 2h.
8. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that in step 5 that rear head solution treatment at 535 DEG C of temperature will be shaped, the solution treatment time is 1h.
9. a kind of uniform integrally formed method of large aluminum alloy tailor welded end socket of performance according to claim 1,
It is characterized in that in step 5 that at 175 DEG C of temperature, artificial aging is handled, artificial aging handles the time as 18h.
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|---|---|---|---|---|
| DE10164662A1 (en) * | 2001-12-28 | 2003-07-17 | Klaus Siegert | Hydro-mechanical deep-draw press has variable-width filling inlet between drawing ring and base frame |
| CN104190776A (en) * | 2014-06-25 | 2014-12-10 | 哈尔滨工业大学 | Hydro-mechanical deep drawing forming method capable of improving surface precision of large-scale thin-wall curved-surface part |
| CN104607524A (en) * | 2014-12-31 | 2015-05-13 | 哈尔滨工业大学 | Tailor welded blank integral drawing forming device and method for large-scale curved surface part |
| CN205763394U (en) * | 2016-06-26 | 2016-12-07 | 内蒙古民族大学 | A kind of magnesium alloy splice-welded plate deep drawing forming device |
| CN107442636A (en) * | 2017-09-06 | 2017-12-08 | 哈尔滨工业大学 | The corrugated removing method of curved surface member building mortion, formed parts and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10164662A1 (en) * | 2001-12-28 | 2003-07-17 | Klaus Siegert | Hydro-mechanical deep-draw press has variable-width filling inlet between drawing ring and base frame |
| CN104190776A (en) * | 2014-06-25 | 2014-12-10 | 哈尔滨工业大学 | Hydro-mechanical deep drawing forming method capable of improving surface precision of large-scale thin-wall curved-surface part |
| CN104607524A (en) * | 2014-12-31 | 2015-05-13 | 哈尔滨工业大学 | Tailor welded blank integral drawing forming device and method for large-scale curved surface part |
| CN205763394U (en) * | 2016-06-26 | 2016-12-07 | 内蒙古民族大学 | A kind of magnesium alloy splice-welded plate deep drawing forming device |
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