CN103481029B - The preparation method of aluminium alloy wheel hub is revolved in a kind of forging - Google Patents

The preparation method of aluminium alloy wheel hub is revolved in a kind of forging Download PDF

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Publication number
CN103481029B
CN103481029B CN201310422618.2A CN201310422618A CN103481029B CN 103481029 B CN103481029 B CN 103481029B CN 201310422618 A CN201310422618 A CN 201310422618A CN 103481029 B CN103481029 B CN 103481029B
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China
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aluminium alloy
wheel hub
forging
alloy wheel
blank
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CN201310422618.2A
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Chinese (zh)
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CN103481029A (en
Inventor
李书通
尤志彬
王新春
朱其柱
丁荣辉
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浙江巨科铝业股份有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/16Spinning over shaping mandrels or formers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00Hubs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/50Other automobile vehicle parts, i.e. manufactured in assembly lines

Abstract

The present invention relates to the preparation method that aluminium alloy wheel hub is revolved in a kind of forging, belong to auto parts manufacturing technology field.In order to solve existing complex process, the problem that production efficiency is low and energy consumption is high, provide a kind of forging to revolve the preparation method of aluminium alloy wheel hub, the method comprises the size according to wheel hub, and aluminum alloy hot rolling Blanking thick plank is become round pie blank; Then be heated to 430 DEG C ~ 470 DEG C and carry out the pre-heat treatment; Again the above-mentioned blank through preheating is put into mould, forge and press with forging press, obtain aluminium alloy wheel hub forging and stamping blank; Finally aluminium alloy wheel hub is forged and pressed blank to put into spinning machine and carry out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub.Method of the present invention is without the need to through jumping-up, and before excellent suitability for press forming, preheat temperature is low, enormously simplify technique, realize the effect enhancing productivity and reduce energy consumption, and product has good mechanical property.

Description

The preparation method of aluminium alloy wheel hub is revolved in a kind of forging
Technical field
The present invention relates to the preparation method that aluminium alloy wheel hub is revolved in a kind of forging, belong to auto parts manufacturing technology field.
Background technology
Wheel hub, as one of vitals in running car system, is also a kind ofly require higher security personnel's part, and the weight of its not only bearing automobile, also embodies the appearance and modeling of automobile simultaneously.In the past 10 years, the annual average rate of increase of global aluminium alloy automobile hub output reached 7.6%.Visible, along with the demand expanding day of automotive light weight technology, aluminium alloy wheel hub just progressively replaces traditional steel wheel hub and is greatly expanded in Hyundai Motor manufacture.
Existing aluminium alloy wheel hub adopts the method for casting or die cast to produce usually, for the cast moulding method of routine, no matter be counter-pressure casting, low pressure casting or gravitational casting, all because the high velocity turbulent flow of its aluminium alloy filling die mould moves, gas in mold cavity cannot be drained, and cause product blank institutional framework not fine and close, easy generation is loosened, the casting flaws such as folder hole, its manufacturing cost is high, the energy and raw materials consumption are comparatively large, and the mechanical property of product and the surface quality of foundry goods can not be fully up to expectations.And be generally that raw material are prepared from the aluminium alloy of cylindric (bar-shaped) as cast condition for the forging revolving shaping method of routine.Aluminium alloy due to as cast condition can exist usually organizes the casting flaw such as coarse grains and pore, shrinkage cavity, loose, micro-crack; thus before excellent suitability for press forming; usually through jumping-up operation or carry out blocking process 3 ~ 4 times (being equivalent to jumping-up) before excellent suitability for press forming; as-cast structure is made to change fibrous Deformation structure into; eliminate the microdefect that metal inside exists; improve the moulding of metal and compactness, for follow-up forging and molding provides suitable blank.But its complex procedures, energy consumption are large, forging cost is high.Also have in existing aluminium alloy wheel hub and adopt semi-solid alloy thixotroping bar as raw material, but in order to be suitable for this raw material, need through the process of higher preheat temperature (being generally about 590 DEG C), then carry out excellent suitability for press forming under lower forging and stamping condition, corresponding energy consumption and cost are all higher.
Summary of the invention
The present invention is directed to above problems of the prior art, a kind of forging is provided to revolve the preparation method of aluminium alloy wheel hub, the method is without the need to through jumping-up process, Simplified flowsheet can be realized, the effect of enhancing productivity, and preheat temperature is low before excellent suitability for press forming, can reduce energy consumption, the product obtained has good mechanical property.
The object of the invention is to be achieved by the following technical programs, the preparation method of aluminium alloy wheel hub is revolved in a kind of forging, and the method comprises the following steps:
A, to get the raw materials ready: the volume calculating required blank according to the size of aluminium alloy wheel hub, becomes round pie blank by aluminum alloy hot rolling Blanking thick plank;
B, preheating: round pie blank heating to 430 obtained above DEG C ~ 470 DEG C is carried out the pre-heat treatment;
C, forging and stamping: put into mould by the above-mentioned blank through preheating, forge and press with forging press, obtain aluminium alloy wheel hub forging and stamping blank;
D, spinning: aluminium alloy wheel hub is forged and pressed blank and put into spinning machine and carry out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub.
The preparation method of aluminium alloy wheel hub is revolved in forging of the present invention, improved by the raw material used to aluminium alloy wheel hub, the aluminium alloy bar of as cast condition is not adopted to be raw material, to reach the object of Simplified flowsheet, make before excellent suitability for press forming, realize the effect without the need to through jumping-up or blocking process (being equivalent to jumping-up).The aluminum alloy hot rolling slab that the present invention selects is formed through hot rolling by ingot casting.Ingot casting is after hot rolling, and crystal grain is extended by refinement, is reached unanimity in crystal orientation, and shrinkage cavity is compacted with loose.Due to the processing that hot rolling is more than recrystallization temperature, while metal generation plastic deformation, to recover, the annealing effect such as recrystallization.Can be broken by the coarse grain of as-cast condition by hot rolling, micro-flaw heals, and reduces or eliminates casting flaw, as-cast structure is changed into fine and close fibrous Deformation structure, thus reaches the effect improving alloy microstructure.The more important thing is, adopt hot rolling aluminium alloy slab to be raw material by improving, without the need to through jumping-up step or blocking treatment step in process, the properties of product obtained at least can reach the suitable performance of existing product, while Simplified flowsheet, still can ensure that the performance of product is even higher.Compared with prior art, the wheel hub of existing employing excellent suitability for press forming adopts the aluminium alloy of as cast condition to process, and do not adopt hot rolling aluminium alloy slab as wheel hub raw material in prior art.On the other hand, with existing employing semi-solid alloy thixotroping bar as compared with raw material, the present invention owing to adopting hot rolling aluminium alloy slab, without the need to through higher preheating temperature, as long as preheat temperature controlled in the scope of forging and stamping temperature, the effect reducing energy consumption can be realized.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, the slab of aluminum alloy hot rolling described in steps A adopts ingot casting to make through hot rolling process.By carrying out hot rolling process more than recrystallization temperature, the institutional framework of alloy can be improved, putting forward heavy alloyed performance.As preferably, the hot rolling start rolling temperature of described 6XXX line aluminium alloy is 490 DEG C ~ 510 DEG C, and finishing temperature is 250 DEG C ~ 350 DEG C, is preferably 6061 or 6082 aluminium alloys; The hot rolling start rolling temperature of described 7XXX line aluminium alloy is 380 DEG C ~ 410 DEG C, and finishing temperature is 250 DEG C ~ 350 DEG C, is preferably 7A04 aluminium alloy.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, described ingot casting is selected from 6XXX line aluminium alloy or 7XXX line aluminium alloy.As further preferred, described 6XXX line aluminium alloy is selected from 6061 or 6082 aluminium alloys; Described 7XXX line aluminium alloy be selected from 7A04,7B04,7075,7475,7050 or 7055 aluminium alloys.6XXX system or 7XXX line aluminium alloy are heat-treatable strengthened aluminum alloy, and after heat treatment its intensity can significantly improve.Can be used in preparing high-strength light aluminium alloy wheel hub.As most preferably, described ingot casting is 6061 aluminium alloys, and described 6061 aluminium alloys comprise the chemical analysis of following composition:
Si:0.4 ~ 0.8; Fe:0 ~ 0.7; Cu:0.15 ~ 0.4; Mn:0 ~ 0.15; Mg:0.8 ~ 1.2; Cr:0.04 ~ 0.35; Zn:0 ~ 0.25; Ti:0 ~ 0.15; Surplus is aluminium.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, the temperature of the pre-heat treatment described in step B is 445 DEG C ~ 455 DEG C.As preferably, the time of described the pre-heat treatment is 30 ~ 50 minutes.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, before forging and stamping described in step C, in advance by mould and die preheating to 420 DEG C ~ 460 DEG C.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, the number of times forged and pressed described in step C is 1 ~ 2 time.Owing to adopting hot rolling aluminium alloy slab to be raw material, not only before excellent suitability for press forming without the need to through repeatedly blocking process (being equivalent to jumping-up), and during excellent suitability for press forming, also consequently reduce the number of times of forging and stamping, enormously simplify production technology, improve production efficiency.As further preferred, the number of times of described forging and stamping is 2 times.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, the thickness of the slab of aluminum alloy hot rolling described in steps A, according to the requirement of hub thickness, by the selection of routine.As preferably, the thickness of described aluminum alloy hot rolling slab is 40mm ~ 100mm.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, described spinning machine adopts horizontal spinning machine or vertical spinning machine, and spinning machine is all spinning machines of this area routine.As further preferred, described in step D, mould pressing is specially:
On horizontal spinning machine, aluminium alloy wheel hub being forged and pressed blank tail top holds out against on spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating, make the plastic deformation of generation continuous print by spinning, obtain forging and revolve aluminium alloy wheel hub.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, heat treatment described in step D is T6 heat treatment.T6 heat treatment refers to solution heat treatment laggard row artificially aged state.T6 heat treatment comprises solution treatment and artificial aging process.
Revolve in the preparation method of aluminium alloy wheel hub in above-mentioned forging, as preferably, machined described in step D comprises the process such as trimming, polishing, polishing and application.Adopt the method for this area routine.
The wheel hub that the preparation method that aluminium alloy wheel hub is revolved in above-mentioned forging of the present invention obtains is mainly used in automotive field, and certain wheel hub of the present invention is not limited in the wheel hub of automotive field, as the wheel hub of association area.
In sum, the present invention compared with prior art, has the following advantages:
1. the preparation method of aluminium alloy wheel hub is revolved in forging of the present invention, owing to adopting hot rolling aluminium alloy slab to be raw material, without the need to through jumping-up step, as long as and before excellent suitability for press forming preheat temperature reach forging and stamping temperature, enormously simplify processing step, realize the effect enhancing productivity and reduce energy consumption.
2. the preparation method of aluminium alloy wheel hub is revolved in forging of the present invention, and the forging obtained is revolved aluminium alloy wheel hub and had good mechanical property, and tensile strength, yield strength and percentage elongation are higher, can reach the requirement of strength of wheel hub completely.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure of the hot rolling aluminium alloy slab in the embodiment of the present invention 4.
Fig. 2 is the metallographic structure figure of the aluminium alloy of as cast condition in comparative example 1 of the present invention.
Detailed description of the invention
Below by specific embodiment, technical scheme of the present invention is described in further detail, but the present invention is not limited to these embodiments.
Embodiment 1
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, become to be of a size of the round pie blank of Φ 350mm × 65mm by the thick 7A04 aluminum alloy hot rolling Blanking thick plank for 65mm; Then, blank surface to be cleaned and degreasing process; Preferably, described 7A04 aluminum alloy hot rolling slab adopts 7A04 aluminium alloy cast ingot to make through hot rolling process;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 440 DEG C and carries out the pre-heat treatment 30 minutes;
Before excellent suitability for press forming, with 20 minutes by mould and die preheating to 450 DEG C, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, the above-mentioned round pie blank through preheating is put into mould, forges and presses with the forging press of 1500 tons, aluminium alloy wheel hub is begun to take shape, obtain aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into spinning machine and carries out mould pressing, described spinning machine is selected from vertical spinning machine or horizontal spinning machine; Preferably, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 300 DEG C ~ 450 DEG C, make the plastic deformation of generation continuous print by spinning, make the wheel rim mould pressing of wheel hub, then, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub.
Embodiment 2
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, become to be of a size of the round pie blank of Φ 350mm × 65mm by the thick 6061 aluminum alloy hot rolling Blanking thick plank for 65mm; Then, blank surface to be cleaned and degreasing process; Preferably, described 6061 aluminum alloy hot rolling slabs are that employing 6061 aluminium alloy cast ingot is made through hot rolling process;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 470 DEG C and carries out the pre-heat treatment 40 minutes;
Before excellent suitability for press forming, with 25 minutes by mould and die preheating to 460 DEG C, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 2 times, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into horizontal spinning machine and carries out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub; In particular, on horizontal spinning machine, the above-mentioned aluminium alloy wheel hub forging and stamping blank tail top begun to take shape is held out against on horizontal spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 450 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub.
Embodiment 3
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, become to be of a size of the round pie blank of Φ 370mm × 58mm by the thick 6061 aluminum alloy hot rolling Blanking thick plank for 58mm; Then, blank surface to be cleaned and degreasing process;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 450 DEG C and carries out the pre-heat treatment 40 minutes;
Before excellent suitability for press forming, with 20 minutes by mould and die preheating to 450 DEG C, then, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 1 time, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into horizontal spinning machine and carries out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub, in particular, on horizontal spinning machine, the above-mentioned aluminium alloy wheel hub forging and stamping blank tail top begun to take shape is held out against on horizontal spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 300 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, described heat treatment preferably adopts T6 heat treatment, described machined comprises trimming, polishing, the process such as polishing and application, obtain finished product forging and revolve aluminium alloy wheel hub.
Embodiment 4
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, thickness is become by the thick 6061 aluminum alloy hot rolling Blanking thick plank for 41mm to be the round pie blank of Φ 440mm × 41mm; Then, blank surface to be cleaned and degreasing process; 6061 aluminum alloy hot rolling slabs described above adopt ingot casting to make through hot rolling process; Described 6061 aluminium alloys comprise the chemical composition of following composition:
Si:0.4 ~ 0.8; Fe:0 ~ 0.7; Cu:0.15 ~ 0.4; Mn:0 ~ 0.15; Mg:0.8 ~ 1.2; Cr:0.04 ~ 0.35; Zn:0 ~ 0.25; Ti:0 ~ 0.15; Surplus is aluminium;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 455 DEG C and carries out the pre-heat treatment 35 minutes;
Before excellent suitability for press forming, with 20 minutes by mould and die preheating to 420 DEG C, then, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 1 time, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into horizontal spinning machine and carries out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub, in particular, on horizontal spinning machine, the above-mentioned aluminium alloy wheel hub forging and stamping blank tail top begun to take shape is held out against on horizontal spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 350 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, described heat treatment preferably adopts T6 heat treatment, described machined comprises trimming, polishing, the process such as polishing and application, obtain finished product forging and revolve aluminium alloy wheel hub.
Embodiment 5
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 26 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, become to be of a size of the round pie blank of Φ 550mm × 100mm by the thick 6061 aluminum alloy hot rolling Blanking thick plank for 100mm; Then, blank surface to be cleaned and degreasing process;
6061 aluminum alloy hot rolling slabs described above adopt ingot casting to make through hot rolling process; Described 6061 aluminium alloys comprise the chemical composition of following composition:
Si:0.5; Fe:0.7; Cu:0.25; Mn:0.15; Mg:1.0; Cr:0.20; Zn:0.25; Ti:0.15; Surplus is aluminium;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 445 DEG C and carries out the pre-heat treatment 35 minutes;
Before excellent suitability for press forming, with 20 minutes by mould and die preheating to 440 DEG C, then, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 2 times, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into horizontal spinning machine and carries out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub, in particular, on horizontal spinning machine, the above-mentioned aluminium alloy wheel hub forging and stamping blank tail top begun to take shape is held out against on horizontal spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 400 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, described heat treatment preferably adopts T6 heat treatment, described machined comprises trimming, polishing, the process such as polishing and application, obtain finished product forging and revolve aluminium alloy wheel hub.
Embodiment 6
The present embodiment revolves aluminium alloy wheel hub for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, aluminum alloy hot rolling Blanking thick plank is become round pie blank; In particular, become to be of a size of the round pie blank of Φ 350mm × 65mm by the thick 6061 aluminum alloy hot rolling Blanking thick plank for 65mm; Then, blank surface to be cleaned and degreasing process;
The round pie blank obtained by above-mentioned stamping-out is put in heating furnace and is heated to 430 DEG C and carries out the pre-heat treatment 40 minutes;
Before excellent suitability for press forming, with 25 minutes by mould and die preheating to 440 DEG C, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 2 times, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into vertical spinning machine and carries out mould pressing, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 400 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, described heat treatment preferably adopts T6 heat treatment, and described machined comprises the process such as trimming, polishing, polishing and application, obtains finished product forging and revolves aluminium alloy wheel hub.
Embodiment 7
The concrete preparation method of the present embodiment is consistent with embodiment 1, difference be only described aluminum alloy hot rolling slab be selected from 7B04,7075,7475,7050 or 7055 aluminum alloy hot rolling slabs carry out embodiment one by one, repeat no more here.
In the present embodiment, 7A04 aluminum alloy hot rolling slab is replaced to 7B04,7075,7475,7050 or 7055 aluminum alloy hot rolling slabs any one, the mechanical property (as tensile strength, yield strength and percentage elongation) that aluminium alloy wheel hub is revolved in the forging of the corresponding product that obtains all can reach adopt 7A04 aluminum alloy hot rolling slab the forging that obtains revolve the suitable mechanical property of aluminium alloy wheel hub.
Comparative example 1
Aluminium alloy wheel hub is revolved for benchmark with the automobile of 17 inches forging:
Calculate the volume of required blank according to the size of aluminium alloy wheel hub, the aluminium alloy bar of the as cast condition being by Φ 250mm cuts into cylindric blank; Cleaning blank, except degreasing with 35 minutes by blank heating to 460 DEG C, be incubated 70 minutes, under 1000 tons of forcing presses, forge 3 times, by blank jumping-up to Φ 350mm, obtain round pie blank; The aluminium alloy bar of described as cast condition is 6061 aluminium alloys, and described 6061 aluminium alloys comprise the chemical composition of following composition:
Si:0.4 ~ 0.8; Fe:0 ~ 0.7; Cu:0.15 ~ 0.4; Mn:0 ~ 0.15; Mg:0.8 ~ 1.2; Cr:0.04 ~ 0.35; Zn:0 ~ 0.25; Ti:0 ~ 0.15; Surplus is aluminium;
Round pie blank obtained above is put in heating furnace again and is heated to 440 DEG C ~ 460 DEG C and carries out the pre-heat treatment 35 minutes;
Before excellent suitability for press forming, with 20 minutes by mould and die preheating to 420 DEG C, then, the upper die and lower die of mould are separated, and on die-face spraying lubricant, described lubricant is as synthetic wax etc.; Then, put into mould by the above-mentioned round pie blank through preheating, forge and press with the forging press of 1500 tons, described forging and stamping number of times is 3 times, and aluminium alloy wheel hub is begun to take shape, and obtains aluminium alloy wheel hub forging and stamping blank;
The above-mentioned aluminium alloy wheel hub forging and stamping blank begun to take shape is put into horizontal spinning machine and carries out mould pressing, then through Overheating Treatment and machined, obtain finished product forging and revolve aluminium alloy wheel hub, in particular, on horizontal spinning machine, the above-mentioned aluminium alloy wheel hub forging and stamping blank tail top begun to take shape is held out against on horizontal spinning machine core, drive plug and aluminium alloy wheel hub to forge and press blank by main shaft to rotate, material is squeezed in the core of rotation from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously, during spinning, aluminium alloy wheel hub is forged and pressed blank blank heating to 400 DEG C, the plastic deformation of generation continuous print is made by spinning, make the wheel rim mould pressing of wheel hub, again through Overheating Treatment and machined, described heat treatment preferably adopts T6 heat treatment, described machined comprises trimming, polishing, the process such as polishing and application, obtain finished product forging and revolve aluminium alloy wheel hub.
Choose forging that above-described embodiment and comparative example obtain to revolve aluminium alloy wheel hub and carry out corresponding Mechanics Performance Testing, sample in wheel hub different piece respectively, wheel rim and spoke position adopt pole degree of drawing sample, select d3 × 30; Wheel rim position adopts sheet tensile sample, select width b10, thickness is wheel rim original thickness, specifically carry out tension test according to GB/T228-2002 examination criteria, the test result of aluminium alloy wheel hub is revolved in the forging that the preparation method being embodiment 1 to embodiment 6 and comparative example 1 with following table 1 obtains, and concrete result of the test is as shown in table 1 below.
Table 1:
Specific embodiment described in the present invention is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.

Claims (10)

1. a preparation method for aluminium alloy wheel hub is revolved in forging, it is characterized in that, the method comprises the following steps:
a, to get the raw materials ready: the volume calculating required blank according to aluminium alloy wheel hub size, becomes round pie by aluminum alloy hot rolling Blanking thick plank
blank;
b, preheating: round pie blank heating to 430 obtained above DEG C ~ 470 DEG C is carried out the pre-heat treatment;
c, forging and stamping: put into mould by the above-mentioned blank through preheating, forge and press with forging press, obtain aluminium alloy wheel hub forging
dabbing base;
d, spinning: aluminium alloy wheel hub is forged and pressed blank and put into spinning machine and carry out mould pressing, then through Overheating Treatment and machined,
obtain finished product forging and revolve aluminium alloy wheel hub.
2. according to claim 1, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, aluminium alloy described in steps A
hot-rolled thick plank adopts ingot casting to make through hot rolling process.
3. according to claim 2, the preparation method of aluminium alloy wheel hub is revolved in forging, and it is characterized in that, described ingot casting is selected from 6XXX
line aluminium alloy or 7XXX line aluminium alloy.
4. according to claim 3, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, described 6XXX line aluminium alloy
be selected from 6061 or 6082 aluminium alloys; Described 7XXX line aluminium alloy be selected from 7A04,7B04,7075,7050 or 7055 aluminium alloys.
5. according to claim 1, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, preheating place described in step B
the temperature of reason is 445 DEG C ~ 455 DEG C.
6. according to claim 5, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, before forging and stamping described in step C,
in advance by mould and die preheating to 420 DEG C ~ 460 DEG C.
7. according to claim 1-6 any one, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, in step C
the number of times of described forging and stamping is 1 ~ 2 time.
8. according to claim 1-6 any one, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, described aluminium
the thickness of alloy hot-rolled thick plank is 40mm ~ 100mm.
9. according to claim 1-6 any one, the preparation method of aluminium alloy wheel hub is revolved in forging, it is characterized in that, step D institute
state mould pressing to be specially:
on horizontal spinning machine, aluminium alloy wheel hub is forged and pressed blank tail top and hold out against on horizontal spinning machine core, by main shaft band
dynamic plug and aluminium alloy wheel hub forging and stamping blank rotate, and material is squeezed in from aluminium alloy wheel hub forging and stamping blank side by spinning wheel simultaneously
on the core rotated, during spinning, aluminium alloy wheel hub is forged and pressed blank heating, makes the plastic deformation of generation continuous print by spinning,
obtain forging and revolve aluminium alloy wheel hub.
10. according to claim 1-6 any one, the preparation method of aluminium alloy wheel hub is revolved in forging, and it is characterized in that, heat treatment described in step D is T6 heat treatment.
CN201310422618.2A 2013-09-16 2013-09-16 The preparation method of aluminium alloy wheel hub is revolved in a kind of forging CN103481029B (en)

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