CN102744570A - 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
CN102744570A
CN102744570A CN201210226497XA CN201210226497A CN102744570A CN 102744570 A CN102744570 A CN 102744570A CN 201210226497X A CN201210226497X A CN 201210226497XA CN 201210226497 A CN201210226497 A CN 201210226497A CN 102744570 A CN102744570 A CN 102744570A
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China
Prior art keywords
spinning
wheel hub
mould
forging
aluminium alloy
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CN201210226497XA
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Chinese (zh)
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CN102744570B (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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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 and used forging mold thereof and spinning mould

Technical field

The present invention relates to the aluminium alloy wheel hub preparing technical field, especially relate to a kind of three-step approach aluminium alloy wheel hub production method.The invention still further relates to used forging mold and spinning mould in this method.

Background technology

At present, aluminium alloy wheel hub just more and more widely be used for automotive field, its preparation technology adopts extrusion process or integrate forging process more.Wherein, when adopting extrusion process, prepared aluminium alloy wheel hub exists casting flaw and the lower problem of mechanical performance unavoidably; When adopting integrate forging process, exist the bigger problem of production cost.Behind above method improvement, carry out the production method of spinning after having occurred forging, preferably resolve above defective.But the method for spinning receives the restriction of production equipment impulse stroke after this forging.That is,, just can only produce the small dimension product if the spinning machine stroke is little.Therefore, in the production equipment restriction, when product was comparatively complicated again, the method for spinning can't adapt to after forging.

Summary of the invention

The purpose of this invention is to provide a kind of three-step approach aluminium alloy wheel hub production method, it has and is guaranteeing under product quality and the lower-cost prerequisite, to the spinning machine stroke require less, thereby the stronger characteristics of adaptability.The invention also discloses used forging mold and spinning mould in this method.

To achieve these goals; The technical scheme that the present invention adopted is: three-step approach aluminium alloy wheel hub production method; Comprise successively the aluminium alloy bar is cut into the stock step, cleans stock removal greasy dirt step, heat tracing stock step, in turn include the following steps after the said heat tracing stock step:

A) rough forge stock: putting into the forging mold that is used for rough forge of forcing press to stock, is the spinning embryonic type with the stock jumping-up;

B) spinning: putting into the spinning mould on the spinning machine to the spinning embryonic type, is the thick type of wheel hub with spinning embryonic type spinning;

C) finish forge: put into the forging mold that is used for finish forge of forcing press to the thick type of wheel hub, smart the beating of the thick type of wheel hub is shaped to wheel hub.

Said heat tracing stock step is: with 20 ~ 30min stock is heated to 450 ~ 550 ℃ from room temperature, insulation 2 ~ 2.5h.

Said step B) in,, spinning the spinning mould is preheated to 280 ~ 380 ℃ from room temperature before beginning with 12 ~ 15min.

Said step B) in, before spinning begins on spinning mould exocoel surface brush the aqua releasing agent.

Said aqua releasing agent aqua releasing agent replaces with No. 38 steam cylinder oils or No. 24 cylinder oils.

Said step C) in, before the thick type of wheel hub being put into the forging mold that is used for finish forge, the thick type of wheel hub is heated to 480 ~ 500 ℃ from room temperature, insulation 2 ~ 2.5h with 20 ~ 25min.

The advantage that this method had is:

1, guaranteed product quality.Three-step approach aluminium alloy wheel hub production method of the present invention has reduced in other technologies the frequent and possibility of generation defective too high with heating-up temperature of heating, thereby the mechanical performance of aluminium alloy wheel hub of vehicle is greatly improved.Through conventional experiment, comparing data is seen attached list:

Subordinate list:

2, preparation cost is low.The heating process number of times is less among the present invention; And for solid forging and die casting, required heating-up temperature is lower.Like this, the present invention wastes energy less, has directly reduced the wheel hub cost.Simultaneously, just can produce through rough forge, spinning, finishing three secondary assembling dies among the present invention because spinning machine impulse stroke and diameter restrictions and the extraordinary major diameter aluminium alloy wheel hub of vehicle blank that can't produce.Like this need not purchasing price expensive large-scale spinning machine, practiced thrift cost of investment.

3, not influenced by the machinery equipment stroke.The combination of the technology through rough forge, spinning, finish forge; In spinning, need not the disposable spinning of the width of wheel hub is put in place; Can replenish by forging; Well solve extraordinary aluminium alloy wheel hub and directly forged difficult moulding, and the difficult problem that the spinning machine stroke can not directly put in place than size behind hour spinning.

Used forging mold in the 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 the top mold frame, and the bottom of upper mold core has last die lip; Counterdie comprises mould bases down; Be provided with the counterdie lasso in the following mould bases; Counterdie lasso inner lower is provided with lower mold core; And last die lip can stretch in the counterdie lasso, and 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.

Be provided with adjusting ring between said top mold frame and the upper mold core.

The bottom of said 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.When the different embryonic type of needs, can accomplish through the shape of the upper and lower core rod of adjustment.When needs carry out rough forge or finish forge, on same forcing press, only need adjust die lip and get into the density that the degree of depth in the counterdie circle can reach different pressure and stock.Simultaneously, the bottom of this forging mold is provided with angled slide block, is beneficial to the demoulding of idiosome after the moulding, and is comparatively convenient.

Said spinning mould comprises front mould, ejecting cap and tail top from left to right successively; Wherein, the shaft coupling of front mould and spinning machine matches, and the push rod of tail top and spinning machine matches; The spinning embryonic type is sandwiched between ejecting cap and the tail top, and is provided with the dish spring between front mould and the ejecting cap; Simultaneously, be provided with spacing connecting bolt between front mould and the ejecting cap, and the dish spring is enclosed within on the spacing connecting bolt.

The advantage of this spinning mould is: easy to use, and can reduce operator's operation easier, and then improve the quality of products, reduce product cost.Aluminium alloy wheel hub anter spinning mould of the present invention in use, the operator only needs the spinning embryonic type is clamped between ejecting cap and the tail top, starts spinning machine afterwards and gets final product.After spinning embryonic type spinning is accomplished, loosening tail top, then ejecting cap ejects from being about to the spinning embryonic type, avoided blank that the operator will have uniform temperature by hand from operations such as front mould prize, thereby operating procedure is few, and operation easier is low.Obviously, comparatively shirtsleeve operation difficulty can avoid product quality to receive the influence of factors such as operator's job morale, degree of fatigue, thereby good product quality, cost are low.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified:

Fig. 1 is a 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 sketch map of spinning mould of the present invention tail roof pressure when the spinning program begins after tight;

Fig. 4 is spinning mould of the present invention assembling sketch map after the disengagement of tail top when the spinning EP (end of program).

Among the figure: 10, front mould, 11, screw rod passes through the 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, go up die lip; 80, counterdie, 81, following mould bases, 82, lower mold core, 83, the counterdie lasso, 84, angled slide block; 100, spinning embryonic type; 200, forging die cavity.

The specific embodiment

The following stated is merely preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.

Embodiment 1, sees 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, this method comprises successively the aluminium alloy bar is cut into the stock step, cleans stock and remove greasy dirt step, heat tracing stock step.Wherein, heat tracing stock step is: with 20min stock is heated to 450 ℃ from room temperature, insulation 2h.The aluminium alloy bar can adopt Φ 355mm bar.Afterwards, carry out following steps successively:

A) rough forge stock: putting into the forging mold that is used for rough forge of forcing press to stock, is the spinning embryonic type with the stock jumping-up.Wherein, forcing press can adopt the 2500T forcing press.

B) spinning: putting into the spinning mould on the horizontal spinning machine of three spinning rollers to the spinning embryonic type, is the thick type of wheel hub with spinning embryonic type spinning; Wherein,, spinning the spinning mould is preheated to 280 ℃ from room temperature before beginning with 12min; Before spinning begins on spinning mould exocoel surface brush the aqua releasing agent.Adopt the aqua releasing agent here, and do not adopt the lubricant of general graphite oil as spinning, because contain magnesium in the aluminium alloy, use graphite oil to produce spot on the blank surface, the temperature height also can produce oil smoke, finally influences the attractive in appearance and environment of product.

C) finish forge: put into the forging mold that is used for finish forge of forcing press to the thick type of wheel hub, smart the beating of the thick type of wheel hub is shaped to wheel hub.Wherein, before the thick type of wheel hub being put into the forging mold that is used for finish forge, the thick type of wheel hub is heated to 480 ℃ from room temperature, insulation 2h with 20min.

Used forging mold comprises forging mold that is used for rough forge and the forging mold that is used for finish forge among the present invention.The structure of these two kinds of forging molds is identical, only is inner difference of forging die cavity.Concrete, see shown in Figure 2: this forging mold comprises patrix 70 and counterdie 80.Obviously, patrix 70 is connected the last downforce platform of forging machine respectively with counterdie 80, and then can lump together.Wherein, patrix 70 comprises the top mold frame 71 that is used to connect the upward pressure platform.Be provided with upper mold core 72 in the top mold frame 71, the bottom of upper mold core 72 has last die lip 721.Counterdie 80 comprises the following mould bases 81 that is used to connect the downforce platform, is provided with counterdie lasso 83 in the following mould bases 81, and counterdie lasso 83 inner lower are provided with lower mold core 82.When patrix 70 and counterdie 80 lumped together, last die lip 721 got in the 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.At this moment, this forging die cavity 200 can match with spinning embryonic type profile or wheel hub profile as required.That is, when model cavity 200 is identical with spinning embryonic type profile, then this forging mold is used for rough forge; When model cavity 200 is identical with wheel hub profile profile, then this forging mold is used for finish forge.Because different, the required product processed specifications of purposes according to mould are different, only need adjustment upper mold core 72, lower mold core 82, counterdie lasso 83 can reach different results of use.Get into counterdie lasso 83 and go up die lip 721, also can reach different forging intensity, embryonic type width, thereby make the scope of application of this forging mold extremely wide through adjustment.

Optimize, be provided with adjusting ring 73 between top mold frame 71 and the upper mold core 72.Obviously, be equipped with the positioner of positioning boss between top mold frame 71, adjustment circle 73, the upper mold core 72.Like this, further increased the flexibility of changing between these forging mold parts, made this forging mold can further widen the scope of application.Certainly, adjustment circle 73 can be a plurality of.

Further optimize, be easy to the demoulding in order to make the idiosome that forges completion, 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 outside the lower mold core 82 on connecting rod or the lower mold core 82.Like this, upwards push angled slide block 84, can idiosome be ejected from the outside of lower mold core 82.

See Fig. 3 and shown in Figure 4, used spinning mould comprises front mould 10, ejecting cap 20 and tail top 30 from left to right successively during spinning mould spinning among the present invention.Wherein, the shaft coupling of front mould 10 and spinning machine matches.That is, during 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.That is, during rotary pressing processing, tail top 30 is installed on the spinning machine push rod.At this moment, spinning embryonic type 100 is sandwiched between ejecting cap 20 and the tail top 30.For make machine after, spinning embryonic type 100 can break away from from mould voluntarily, is provided with dish spring 50 between front mould 10 and the ejecting cap 20.That is, after rotary pressing processing is accomplished, 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.

Optimize, after ejecting spinning embryonic type 100, have the gap between ejecting cap 20 and the front mould 10, but can not separate, then be provided with spacing connecting bolt 40 between front mould 10 and the ejecting cap 20.Concrete, the screw rod of this spacing connecting bolt 40 is screwed in ejecting cap 20 left sides.Simultaneously, front mould 10 is provided with screw rod through hole 11, and what the screw clearance of spacing connecting bolt 40 cooperated passes this screw rod through hole 11, 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 at the screw rod of front mould 10 to slide in the hole 11, thereby the distance between ejecting cap 20 and the front mould 10 can change, but the two connects all the time.At this moment, for the compactness of spinning mould structure, dish spring 50 can be enclosed within on the spacing connecting bolt 40.

Like this, when the spinning program begins, tail top 30 is the top left, and 50 compressions of dish spring are pressed on the ejecting cap 20 spinning embryonic type 100, afterwards spinning embryonic type 100 are carried out rotary pressing processing.When the 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 receives the control of spacing connecting bolt 40, and then spinning embryonic type 100 is separated with ejecting cap 20.

Embodiment 2: be with the difference of implementing 1: heat tracing stock step is: with 25min stock is heated to 500 ℃ from room temperature, insulation 2.2h; Step B) in,, spinning the spinning mould is preheated to 350 ℃ from room temperature before beginning with 13min; Step B) in, before spinning begins on spinning mould exocoel surface brush No. 38 steam cylinder oils; Step C) in, before the thick type of wheel hub being put into the forging mold that is used for finish forge, the thick type of wheel hub is heated to 490 ℃ from room temperature, insulation 2.2h with 23min.Wherein, adopt No. 38 cylinder oils to replace the aqua releasing agent, and do not adopt the lubricant of general graphite oil as spinning, reason is with using the aqua releasing agent among the embodiment 1.

Embodiment 3: be with the difference of implementing 1: heat tracing stock step is: 30min is heated to 550 ℃ with stock from room temperature, insulation 2.5h; Step B) in,, spinning the spinning mould is preheated to 380 ℃ from room temperature before beginning with 15min; Step B) in, before spinning begins on spinning mould exocoel surface brush No. 24 cylinder oils; Step C) in, before the thick type of wheel hub being put into the forging mold that is used for finish forge, the thick type of wheel hub is heated to 500 ℃ from room temperature, insulation 2.5h with 25min.Wherein, the water releasing agent replaces with No. 24 cylinder oils, and reason is same as and uses No. 38 steam cylinder oils among the embodiment 2.

Claims (10)

1. three-step approach aluminium alloy wheel hub production method comprises the aluminium alloy bar is cut into the stock step, cleans stock removal greasy dirt step, heat tracing stock step successively, it is characterized in that: in turn include the following steps after the said heat tracing stock step:
A) rough forge: putting into the forging mold that is used for rough forge of forcing press to stock, is the spinning embryonic type with the stock jumping-up;
B) spinning: putting into the spinning mould on the spinning machine to the spinning embryonic type, is the thick type of wheel hub with spinning embryonic type spinning;
C) finish forge: put into the forging mold that is used for finish forge of forcing press to the thick type of wheel hub, smart the beating of the thick type of wheel hub is shaped to wheel hub.
2. three-step approach aluminium alloy wheel hub production method according to claim 1 is characterized in that: said heat tracing stock step is: with 20 ~ 30min stock is heated to 450 ~ 550 ℃ from room temperature, insulation 2 ~ 2.5h.
3. three-step approach aluminium alloy wheel hub production method according to claim 1 is characterized in that: said step B), before spinning begins, with 12 ~ 15min the spinning mould is preheated to 280 ~ 380 ℃ from room temperature.
4. three-step approach aluminium alloy wheel hub production method according to claim 1 is characterized in that: said step B), before spinning begins on spinning mould exocoel surface brush the aqua releasing agent.
5. three-step approach aluminium alloy wheel hub production method according to claim 4 is characterized in that: said 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: said step C); Before the thick type of wheel hub being put into the forging mold that is used for finish forge, the thick type of wheel hub is heated to 480 ~ 500 ℃ from room temperature, insulation 2 ~ 2.5h with 20 ~ 25min.
7. used forging mold in each described three-step approach aluminium alloy wheel hub production method in the claim 1 to 6; It is characterized in that: said forging mold comprises upper die and lower die, and wherein, patrix comprises top mold frame; Be provided with upper mold core in the top mold frame, the bottom of upper mold core has last die lip; Counterdie comprises mould bases down; Be provided with the counterdie lasso in the following mould bases; Counterdie lasso inner lower is provided with lower mold core; And last die lip can stretch in the counterdie lasso, and 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.
8. used rough forge mould in the described three-step approach aluminium alloy wheel hub of claim 7 production method is characterized in that: be provided with adjusting ring between said top mold frame and the upper mold core.
9. used rough forge mould in the described three-step approach aluminium alloy wheel hub of claim 7 production method, it is characterized in that: the bottom of said lower mold core is provided with angled slide block.
10. used forging mold in each described three-step approach aluminium alloy wheel hub production method in the claim 1 to 6; It is characterized in that: said spinning mould comprises front mould, ejecting cap and tail top from left to right successively; Wherein, the shaft coupling of front mould and spinning machine matches, and the push rod of tail top and spinning machine matches; The spinning embryonic type is sandwiched between ejecting cap and the tail top, and is provided with the dish spring between front mould and the ejecting cap; Simultaneously, be provided with spacing connecting bolt between front mould and the ejecting cap, the dish spring is enclosed within on the spacing connecting bolt.
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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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN103084559A (en) * 2013-02-18 2013-05-08 天津那诺机械制造有限公司 Forging method and forging device of twice forcing molten soup forging wheel
CN103331575A (en) * 2013-06-07 2013-10-02 南通福乐达汽车配件有限公司 Forming technique of hub with bidirectional cylindrical boss
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
CN104907533A (en) * 2015-05-05 2015-09-16 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
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
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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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103084559A (en) * 2013-02-18 2013-05-08 天津那诺机械制造有限公司 Forging method and forging device of twice forcing molten soup forging wheel
CN103331575A (en) * 2013-06-07 2013-10-02 南通福乐达汽车配件有限公司 Forming technique of hub with bidirectional cylindrical boss
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
CN104907533A (en) * 2015-05-05 2015-09-16 中国兵器科学研究院宁波分院 Extrusion casting method for hub workblank
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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