CN102744570B - Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same - Google Patents

Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same Download PDF

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Publication number
CN102744570B
CN102744570B CN201210226497.XA CN201210226497A CN102744570B CN 102744570 B CN102744570 B CN 102744570B CN 201210226497 A CN201210226497 A CN 201210226497A CN 102744570 B CN102744570 B CN 102744570B
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China
Prior art keywords
spinning
wheel hub
mold
forging
stock
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CN201210226497.XA
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Chinese (zh)
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CN102744570A (en
Inventor
徐国兴
刘军
徐敬捷
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宁波宝通轮业有限公司
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Priority to CN201210226497.XA priority Critical patent/CN102744570B/en
Publication of CN102744570A publication Critical patent/CN102744570A/en
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Abstract

The invention discloses a three-step aluminum alloy hub producing method, which sequentially comprises the following steps of: cutting aluminum alloy bars into a blank, cleaning the blank to remove oil stain, heating and insulating the blank; roughly forging the blank: putting the blank into a forging die for rough forging in a press, and upsetting the blank into a spinning blank; spinning: putting the spinning blank into a spinning die on a spinning machine; and spinning the spinning blank into a rough hub; and performing precision forging: putting the rough hub into a forging die for precision forging in the press, and spinning the spinning blank into a hub. The method has the advantage of low requirement for the travel of the spinning machine on the premise that the quality of the hub is ensured and the cost is low. The invention also discloses the forging dies and the spinning dies which are used in the method.

Description

Three-step approach aluminium alloy wheel hub production method
Technical field
The present invention relates to aluminium alloy wheel hub preparing technical field, especially relate to a kind of three-step approach aluminium alloy wheel hub production method.
Background technology
At present, aluminium alloy wheel hub is just more and more widely used in automotive field, and its preparation technology adopts extrusion process or integrate forging process more.Wherein, while adopting extrusion process, prepared aluminium alloy wheel hub exists casting flaw and the lower problem of mechanical performance unavoidably; While adopting integrate forging process, exist the problem that production cost is larger.By after above method improvement, there is carrying out after forging the production method of spinning, preferably resolve above defect.But the method for spinning is subject to the restriction of production equipment impulse stroke after this forging.,, if spinning machine stroke is little, just can only produce small dimension product.Therefore,, in production equipment restriction, when product is comparatively complicated again, after forging, the method for spinning cannot adapt to.
Summary of the invention
The object of this invention is to provide a kind of three-step approach aluminium alloy wheel hub production method, it has ensureing under product quality and lower-cost prerequisite, less to the requirement of spinning machine stroke, thus the stronger feature of adaptability.
To achieve these goals, the technical solution adopted in the present invention is: three-step approach aluminium alloy wheel hub production method, comprise successively aluminium alloy bar cut into stock step, clean stock wipe oil step, heating and thermal insulation stock step, after described heating and thermal insulation stock step, in turn include the following steps:
A) rough forge stock: stock being put into the forging mold for rough forge of forcing press, is spinning embryonic type by stock jumping-up;
B) spinning: spinning embryonic type is put into the spinning mold on spinning machine, is the thick type of wheel hub by spinning embryonic type spinning;
C) finish forge: thick wheel hub type is put into the forging mold for finish forge of forcing press, thick wheel hub type essence is beaten and is shaped to wheel hub.
Described heating and thermal insulation stock step is: stock is heated to 450~550 DEG C from room temperature with 20~30min, insulation 2~2.5h.
Described step B) in, before starting, spinning, with 12~15min, spinning mold is preheated to 280~380 DEG C from room temperature.
Described step B) in, before spinning starts in spinning mold exocoel surface brush aqua releasing agent.
Described aqua releasing agent aqua releasing agent replaces with No. 38 steam cylinder oils or No. 24 cylinder oils.
Described step C) in, before being put into for the forging mold of finish forge, thick wheel hub type, with 20~25min, thick wheel hub type is heated to 480~500 DEG C from room temperature, insulation 2~2.5h.
The advantage that this method has is:
1, ensured product quality.Three-step approach aluminium alloy wheel hub production method of the present invention has reduced in other techniques that heating is frequent and heating-up temperature is too high and the possibility of generation defect, thereby the mechanical performance of aluminium alloy wheel hub of vehicle is greatly improved.Through normal experiment, comparing data sees attached list:
Subordinate list:
2, preparation cost is low.In the present invention, heating process number of times is less; And for solid forging and die casting, required heating-up temperature is lower.Like this, the present invention wastes energy less, has directly reduced wheel hub cost.Meanwhile, in the present invention, just can produce by rough forge, spinning, the secondary assembling die of finishing three the extraordinary major diameter aluminium alloy wheel hub of vehicle blank that cannot produce due to the restriction of spinning machine impulse stroke and diameter.Large-scale spinning machine that like this need not purchasing price costliness, has saved cost of investment.
3, not affected by machinery equipment stroke.The combination of the technique by rough forge, spinning, finish forge, in spinning without disposable the width of wheel hub spinning is put in place, can be supplemented by forging, well solve extraordinary aluminium alloy wheel hub and directly forged difficult moulding, and the difficult problem that spinning machine stroke can not directly put in place compared with size after hour spinning.
Forging mold used in three-step approach aluminium alloy wheel hub production method of the present invention, comprises upper die and lower die, and wherein, patrix comprises top mold frame, is provided with upper mold core in top mold frame, and the bottom of upper mold core has upper die lip; Counterdie comprises lower mold holder, in lower mold holder, be provided with counterdie lasso, counterdie lasso inner lower is provided with lower mold core, and upper die lip can stretch in counterdie lasso, upper mold core lower surface, counterdie lasso madial wall, lower mold core upper surface surround forging die cavity jointly, and this forging die cavity and spinning embryonic type profile or wheel hub profile match.
Between described top mold frame and upper mold core, be provided with adjusting ring.
The bottom of described lower mold core is provided with angled slide block.
The advantage of this forging mold is: parts are substituting better, wide accommodation, and easy to use.Forging mold of the present invention adopts split-type structural.In the time of the different embryonic type of needs, can complete by the shape of adjusting upper and lower core rod.In the time that needs carry out rough forge or finish forge, on same forcing press, the density that only needs to adjust die lip and enter the degree of depth in counterdie circle and can reach different pressure and stock.Meanwhile, the bottom of this forging mold is provided with angled slide block, is beneficial to the demoulding of idiosome after moulding, more for convenience.
Described spinning mold comprises front mould, ejecting cap and tail top from left to right successively, and wherein, the shaft coupling of front mould and spinning machine matches, and the push rod of tail top and spinning machine matches, and spinning embryonic type is sandwiched between ejecting cap and tail top, and between front mould and ejecting cap, is provided with dish spring; Meanwhile, between front mould and ejecting cap, be provided with spacing connecting bolt, and dish spring is enclosed within on spacing connecting bolt.
The advantage of this spinning mold is: easy to use, and can reduce operator's operation easier, and then improve the quality of products, reduce product cost.In use, operator only needs spinning embryonic type to be clamped between ejecting cap and tail top to aluminium alloy wheel hub anter spinning mold of the present invention, starts afterwards spinning machine.After spinning embryonic type spinning completes, loosening tail top, ejecting cap ejects from being about to spinning embryonic type, avoided operator manual by the blank with uniform temperature from operations such as front mould prize, thereby operating procedure is few, operation easier is low.Obviously, comparatively shirtsleeve operation difficulty, can avoid product quality to be subject to the impact of the factors such as operator's job morale, degree of fatigue, thereby good product quality, cost are low.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is flow sheet of the present invention;
Fig. 2 is that the master of forging mold of the present invention looks cutaway view;
Fig. 3 is the assembling schematic diagram after spinning mold of the present invention tail top in the time that spinning program starts compresses;
Fig. 4 is the assembling schematic diagram after throw off on spinning mold of the present invention tail top in the time of spinning EP (end of program).
In figure: 10, front mould, 11, screw rod passes through hole; 20, ejecting cap; 30, tail top; 40, spacing connecting bolt; 50, dish spring; 70, patrix, 71, top mold frame, 72, upper mold core, 721, upper die lip; 80, counterdie, 81, lower mold holder, 82, lower mold core, 83, counterdie lasso, 84, angled slide block; 100, spinning embryonic type; 200, forging die cavity.
Detailed description of the invention
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment 1, as shown in Figure 1: three-step approach aluminium alloy wheel hub production method is taked in the preparation of aluminium alloy wheel hub of the present invention.Concrete, the method comprises successively aluminium alloy bar is cut into stock step, cleans stock wipe oil step, heating and thermal insulation stock step.Wherein, heating and thermal insulation stock step is: stock is heated to 450 DEG C from room temperature with 20min, insulation 2h.Aluminium alloy bar can adopt Φ 355mm bar.Afterwards, carry out successively following steps:
A) rough forge stock: stock being put into the forging mold for rough forge of forcing press, is spinning embryonic type by stock jumping-up.Wherein, forcing press can adopt 2500T forcing press.
B) spinning: spinning embryonic type is put into the spinning mold on three spinning roller horizontal spinning machines, is the thick type of wheel hub by spinning embryonic type spinning; Wherein, before starting, spinning, with 12min, spinning mold is preheated to 280 DEG C from room temperature; Before spinning starts in spinning mold exocoel surface brush aqua releasing agent.Adopt aqua releasing agent herein, and do not adopt the lubricant of general graphite oil as spinning, because contain magnesium in aluminium alloy, use graphite oil to produce spot on blank surface, temperature height also can produce oil smoke, finally affects the attractive in appearance and environment of product.
C) finish forge: thick wheel hub type is put into the forging mold for finish forge of forcing press, thick wheel hub type essence is beaten and is shaped to wheel hub.Wherein, before being put into for the forging mold of finish forge, thick wheel hub type, with 20min, thick wheel hub type is heated to 480 DEG C from room temperature, insulation 2h.
In the present invention, forging mold used comprises for the forging mold of rough forge with for the forging mold of finish forge.The structure of these two kinds of forging molds is identical, is only inner difference of forging die cavity.Concrete, as shown in Figure 2: this forging mold comprises patrix 70 and counterdie 80.Obviously, patrix 70 is connected respectively the upper downforce platform of forging machine with counterdie 80, and then can be combined.Wherein, patrix 70 comprises the top mold frame 71 for connecting upper pressure platform.In top mold frame 71, be provided with upper mold core 72, the bottom of upper mold core 72 has upper die lip 721.Counterdie 80 comprises the lower mold holder 81 for connecting downforce platform, is provided with counterdie lasso 83 in lower mold holder 81, and counterdie lasso 83 inner lower are provided with lower mold core 82.In the time that patrix 70 and counterdie 80 are combined, upper die lip 721 enters in counterdie lasso 83 like this, and upper mold core 72 lower surfaces, counterdie lasso 83 madial walls, lower mold core 82 upper surfaces surround forging die cavity 200 jointly.Now, this forging die cavity 200 as required, can match with spinning embryonic type profile or wheel hub profile.,, when model cavity 200 is identical with spinning embryonic type profile, this forging mold is for rough forge; When model cavity 200 is identical with wheel hub profile profile, this forging mold is for finish forge.Due to according to the product specification difference of the purposes difference of mould, required processing, only need adjustment upper mold core 72, lower mold core 82, counterdie lasso 83 can reach different results of use.And enter counterdie lasso 83 by adjusting upper die lip 721, also can reach different forging intensity, embryonic type width, thereby make the scope of application of this forging mold extremely wide.
Optimize, between top mold frame 71 and upper mold core 72, be provided with adjusting ring 73.Obviously, between top mold frame 71, adjustment circle 73, upper mold core 72, be equipped with the positioner of positioning boss.Like this, further increase the flexibility of exchanging between these forging mold parts, made this forging mold can further widen the scope of application.Certainly it can be multiple, adjusting circle 73.
Further optimize, for the idiosome that makes to have forged is easy to the demoulding, the bottom of this lower mold core 82 is provided with angled slide block 84.Obviously, this angled slide block 84 has through hole to being connected with in connecting rod or lower mold core 82 outside lower mold core 82.Like this, upwards push angled slide block 84 from the outside of lower mold core 82, idiosome can be ejected.
See shown in Fig. 3 and Fig. 4, when spinning mold spinning in the present invention, spinning mold used comprises front mould 10, ejecting cap 20 and tail top 30 from left to right successively.Wherein, the shaft coupling of front mould 10 and spinning machine matches.,, when rotary pressing processing, front mould 10 is fixedly connected on the shaft coupling of spinning machine.The push rod of tail top 30 and spinning machine matches.,, when rotary pressing processing, tail top 30 is arranged on spinning machine push rod.Now, spinning embryonic type 100 is sandwiched between ejecting cap 20 and tail top 30.For after making to machine, spinning embryonic type 100 can depart from from mould voluntarily, between front mould 10 and ejecting cap 20, is provided with dish spring 50.That is, after rotary pressing processing completes, tail top 30 displacements to the right, dish spring 50 promotes ejecting cap 20 displacements to the right, thus thereby spinning embryonic type 100 becomes the thick type of wheel hub from front mould 10 and ejecting cap 20 disengagings.
To optimize, in order ejecting after spinning embryonic type 100, between ejecting cap 20 and front mould 10, to there is gap, but can not separate, between front mould 10 and ejecting cap 20, be provided with spacing connecting bolt 40.Concrete, the screw rod of this spacing connecting bolt 40 is screwed in ejecting cap 20 left sides.Meanwhile, front mould 10 is provided with screw rod by hole 11, and what the screw clearance of spacing connecting bolt 40 coordinated passes through hole 11 through this screw rod, and the head of spacing connecting bolt 40 is positioned at the left side of front mould 10.Like this, this spacing connecting bolt 40 can pass through the interior slip in hole 11 at the screw rod of front mould 10, thereby the distance between ejecting cap 20 and front mould 10 can change, but the two connects all the time.Now, for the compactness of spinning mold structure, dish spring 50 can be enclosed within on spacing connecting bolt 40.
Like this, when spinning program starts, top left, tail top 30, dish spring 50 compresses, and spinning embryonic type 100 is pressed on ejecting cap 20, afterwards spinning embryonic type 100 is carried out to rotary pressing processing.When spinning EP (end of program), return to the right on tail top 30, and dish spring 50 unclamps, and spinning embryonic type 100 and ejecting cap 20 are ejected.But ejecting cap 20 is subject to the control of spacing connecting bolt 40, spinning embryonic type 100 separates with ejecting cap 20.
Embodiment 2: with implement 1 difference and be: heating and thermal insulation stock step is: stock is heated to 500 DEG C from room temperature, insulation 2.2h with 25min; Step B) in, before starting, spinning, with 13min, spinning mold is preheated to 350 DEG C from room temperature; Step B) in, before spinning starts in spinning mold exocoel surface brush No. 38 steam cylinder oils; Step C) in, before being put into for the forging mold of finish forge, thick wheel hub type, with 23min, thick wheel hub type is heated to 490 DEG C from room temperature, insulation 2.2h.Wherein, adopt No. 38 cylinder oils to replace aqua releasing agent, and do not adopt the lubricant of general graphite oil as spinning, reason is with using aqua releasing agent in embodiment 1.
Embodiment 3: be: heating and thermal insulation stock step is: 30min is heated to 550 DEG C by stock from room temperature insulation 2.5h with the difference of implementing 1; Step B) in, before starting, spinning, with 15min, spinning mold is preheated to 380 DEG C from room temperature; Step B) in, before spinning starts in spinning mold exocoel surface brush No. 24 cylinder oils; Step C) in, before being put into for the forging mold of finish forge, thick wheel hub type, with 25min, thick wheel hub type is heated to 500 DEG C from room temperature, insulation 2.5h.Wherein, water releasing agent replaces with No. 24 cylinder oils, and reason is same as and in embodiment 2, applies No. 38 steam cylinder oil.

Claims (6)

1. three-step approach aluminium alloy wheel hub production method, comprises successively aluminium alloy bar is cut into stock step, cleans stock wipe oil step, heating and thermal insulation stock step, it is characterized in that: after described heating and thermal insulation stock step, in turn include the following steps:
A) rough forge: stock being put into the forging mold for rough forge of forcing press, is spinning embryonic type by stock jumping-up;
B) spinning: spinning embryonic type is put into the spinning mold on spinning machine, is the thick type of wheel hub by spinning embryonic type spinning;
C) finish forge: thick wheel hub type is put into the forging mold for finish forge of forcing press, thick wheel hub type essence is beaten and is shaped to wheel hub.
2. three-step approach aluminium alloy wheel hub production method according to claim 1, is characterized in that: described heating and thermal insulation stock step is: stock is heated to 450~550 DEG C from room temperature with 20~30min, insulation 2~2.5h.
3. three-step approach aluminium alloy wheel hub production method according to claim 1, is characterized in that: described step B) in, before starting, spinning, with 12~15min, spinning mold is preheated to 280~380 DEG C from room temperature.
4. three-step approach aluminium alloy wheel hub production method according to claim 1, is characterized in that: described step B) in, before spinning starts in spinning mold exocoel surface brush aqua releasing agent.
5. three-step approach aluminium alloy wheel hub production method according to claim 4, is characterized in that: described aqua releasing agent replaces with No. 38 steam cylinder oils or No. 24 cylinder oils.
6. three-step approach aluminium alloy wheel hub production method according to claim 1, it is characterized in that: described step C) in, before being put into for the forging mold of finish forge, thick wheel hub type, with 20~25min, thick wheel hub type is heated to 480~500 DEG C from room temperature, insulation 2~2.5h.
CN201210226497.XA 2012-06-29 2012-06-29 Three-step aluminum alloy hub producing method and forging dies and spinning dies used by same CN102744570B (en)

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CN103084559B (en) * 2013-02-18 2014-05-28 天津那诺机械制造有限公司 Forging method and forging device of twice forcing molten soup forging wheel
CN103331575B (en) * 2013-06-07 2015-11-25 南通福乐达汽车配件有限公司 A kind of moulding process of two-way tubular boss wheel hub
CN104259789A (en) * 2014-09-29 2015-01-07 宁波宝通轮业有限公司 Preparation method of two-sheet aluminum alloy rim
CN105728537A (en) * 2014-12-09 2016-07-06 北京有色金属研究总院 Hot-spinning cogging method based on nonuniform heating of aluminum alloy
CN104907533B (en) * 2015-05-05 2017-02-01 中国兵器科学研究院宁波分院 Extrusion casting method for hub workblank
CN104959778A (en) * 2015-05-29 2015-10-07 浙江欧迪恩传动科技股份有限公司 Constant speed universal joint end face transmission gear precision forging moulding technology
CN109048226A (en) * 2018-09-07 2018-12-21 温州力邦企业有限公司 The preparation process of hub of motorcycle
CN111375993A (en) * 2020-01-02 2020-07-07 山东浩信机械有限公司 Hub assembly, hub and manufacturing process thereof

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JP2596687B2 (en) * 1993-01-08 1997-04-02 株式会社神戸製鋼所 Manufacturing method of light alloy wheel
CN1827289A (en) * 2006-03-31 2006-09-06 嘉兴市四通车轮制造有限公司 Forging and rotary extrusion forming process for aluminium alloy wheel
CN100531956C (en) * 2007-09-18 2009-08-26 徐国兴 Mold for smithing aluminium alloy wheel hub of vehicle
CN101912944B (en) * 2010-08-03 2012-07-25 燕山大学 Method for machining aluminum alloy hub
CN102133607A (en) * 2011-01-16 2011-07-27 中信戴卡轮毂制造股份有限公司 Upper die jacking device of improved spinning die
CN202606699U (en) * 2012-06-29 2012-12-19 宁波宝通轮业有限公司 Aluminum alloy wheel hub front part spinning mould
CN202621813U (en) * 2012-06-29 2012-12-26 宁波宝通轮业有限公司 Forging die used during production of aluminium alloy hub

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