CN107598066A - Backward extrusion die forging method for magnesium alloy hub - Google Patents
Backward extrusion die forging method for magnesium alloy hub Download PDFInfo
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- CN107598066A CN107598066A CN201710889185.XA CN201710889185A CN107598066A CN 107598066 A CN107598066 A CN 107598066A CN 201710889185 A CN201710889185 A CN 201710889185A CN 107598066 A CN107598066 A CN 107598066A
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- magnesium alloy
- hub
- mould
- forging method
- backward extrusion
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Abstract
The present invention provides a kind of backward extrusion die forging method for magnesium alloy hub, wheel hub can be achieved into large-scale production on common forging press, mould is fairly simple, and process is simple；And the mechanical property for improving magnesium alloy can be plastically deformed by backward extrusion, magnesium alloy is met the requirement of wheel hub；With considerable economic benefit.
Description
Technical field
The invention belongs to wheel hub manufacturing field, more particularly to a kind of backward extrusion die forging method for magnesium alloy hub.
Background technology
Magnesium alloy hub has very big demand space in aviation, transportation equipment, particularly auto manufacturing.Although magnesium closes
Golden wheel hub has obvious advantage, but magnesium alloy hub is not widely used also as aluminium alloy wheel hub at present, and it makes
Also well below aluminium alloy wheel hub, main cause has [1-2] dosage：
It is molded 1. magnesium-alloy material is more by compression casting.Die casting equipment is expensive, and production cost is high, and after casting
Product shrinkage porosite, shrinkage cavity and rarefaction defect be present, the mechanical property of wheel hub is poor [3], it is impossible to meets wheel hub requirement.
2. magnesium is close-packed hexagonal structure, slip system is few, and metal fluidity is poor at room temperature, and plasticity is low, and plastic working is difficult, holds
The defects of being also easy to produce crackle；Plasticity is preferable under high temperature, but strict to shaping rate, forming temperature requirement, and shaping control is difficult.
[1] Peng Yinghong, Wang Yingchun, Lee Numerical Simulation of Low Pressure Die Casting of Magnesium Alloy Wheel [J] China mechanics forever greatly
Journey,
2006,17 (19)：2034-2037.
[2] Tang Lishan, not red tinkling of pieces of jade automobile light-alloys wheel hub research [J] .CAD/CAM and manufacturing informatization, 2008,
(Z1)：18-19.
[3]Hong Tae Kang,Terry Ostrom.Mechinical behavior of cast and forged
magnesium alloys and their microstructures[J].Materials science and
engineering A,2008,490(2):52-56.
The content of the invention
The main object of the present invention is to provide a kind of backward extrusion die forging method for magnesium alloy hub, cancels magnesium alloy wheel
Hub T6 Technologies for Heating Processing；The magnesium alloy hub performance produced using backward extrusion swaging technique can be directly up to standard, improves product
Quality and production efficiency, reduce production cost.
To solve the above problems, the present invention provide a kind of backward extrusion die forging method for magnesium alloy hub, it include with
Lower step：
Step 1: magnesium alloy rod preheats：
Magnesium alloy rod is placed in main frequency furnace and preheated, the temperature of the main frequency furnace is 420 DEG C；
Step 2: mould preheats：
The indirect-extrusion mould of one heating is provided, heating-up temperature is 450 DEG C ± 5 DEG C, soaking time 20min, and preheat
The magnesium alloy rod is positioned in the die cavity of the indirect-extrusion mould；
Step 3: backward extrusion：
The indirect-extrusion mould has a upper male mould, and the magnesium alloy rod squeezes downwards when the upper male mould moves downward
Pressure, the speed of the extruding be 0.6-0.7mm/s, coefficient of friction 0.10, while fill the die cavity with obtained precast hollow
Shape circular hub, and keeping temperature is 420 DEG C, reverse extrusion power is 80KN；
Step 4: forging and stamping processing：
Carry out forging and pressing obtained semi-finished product wheel hub under the conditions of being 420 DEG C in temperature by the precast hollow shape circular hub, it
After be machined out finished product magnesium alloy hub.
Preferably, in the described backward extrusion die forging method for magnesium alloy hub, the indirect-extrusion mould includes upper
Punch-pin, lower punch and the cavity plate being arranged between the upper male mould and the lower punch.
Preferably, in the described backward extrusion die forging method for magnesium alloy hub, the cavity plate and the upper male mould
It is wound with electric furnace heating wire and heat-preservation cotton outside.
Preferably, in the described backward extrusion die forging method for magnesium alloy hub, above the magnesium alloy rod
Thermocouple is provided with 10mm-50mm, the thermocouple is used to measure the temperature in the indirect-extrusion mould.
Preferably, in the described backward extrusion die forging method for magnesium alloy hub, the magnesium alloy rod is cylinder
Shape.
Preferably, in the described backward extrusion die forging method for magnesium alloy hub, the precast hollow shape circular wheel
Hub is cup.
Beneficial effects of the present invention：
The magnesium alloy hub produced using backward extrusion die forging method provided by the invention, magnesium alloy blank and mould are carried out
Heating, is forged and pressed, a forging forming using indirect-extrusion mould；The higher magnesium alloy hub of compactness can be forged and pressed out.Pass through this
Backward extrusion swaging technique, it is possible to increase magnesium alloy hub lumber recovery, improve wheel products quality；Large-scale production performance can be achieved
Stable magnesium alloy hub；
, can be real on common forging press by wheel hub provided by the present invention for the backward extrusion die forging method of magnesium alloy hub
Existing large-scale production, mould is fairly simple, and process is simple；And the mechanical property for improving magnesium alloy can be plastically deformed by backward extrusion
Can, magnesium alloy is met the requirement of wheel hub；With considerable economic benefit.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the flow chart provided by the present invention for the backward extrusion die forging method of magnesium alloy hub；
Fig. 2 is the magnesium alloy bar provided by the present invention for one embodiment of the backward extrusion die forging method of magnesium alloy hub
The modified flow figure of material；
Fig. 3 is the backward extruding die provided by the present invention for one embodiment of the backward extrusion die forging method of magnesium alloy hub
The structural representation of tool；
Fig. 4 is the forge die provided by the present invention for one embodiment of the backward extrusion die forging method of magnesium alloy hub
Structural representation.
Embodiment
The present invention is described in further detail below, to make those skilled in the art being capable of evidence with reference to specification word
To implement.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
As depicted in figs. 1 and 2, the present invention provide a kind of backward extrusion die forging method for magnesium alloy hub, it include with
Lower step：
It is prepared by 1 blank：
According to wheel hub specification weight, prepare magnesium alloy semi-continuous casting bar, then magnesium alloy rod is mounted in main frequency furnace
Heating, hot temperature are maintained at 420 DEG C, and preheated magnesium alloy rod blank is put into the indirect-extrusion mould heated and implemented instead
Extruding.Bar preheating uses main frequency furnace mode of heating, with contact digital display thermocouple automatic thermometric.
2 anti-extrusions：
Cylindrical magnesium alloy bar is placed in indirect-extrusion mould and implements backward extrusion, backward extrusion is prefabricated into hub-like cup
Base；Process is simple.Indirect-extrusion mould mode of heating uses external electric furnace heating wire mode of heating, and electric furnace heating wire is wrapped in into the He of cavity plate 3
On upper mould 1, and wrapped up outside with heat-preservation cotton, its heating and temperature control at 450 DEG C, temperature control tolerance within positive and negative 5 DEG C,
It is being heated to predetermined temperature soaking time 20 minutes, furnace temperature thermocouple measurement, thermocouple is mounted in distance above magnesium alloy blank
Blank 10--50mm；The punch-pin 1 of indirect-extrusion mould moves downward, and magnesium alloy blank, which moves downward, carries out extrusion packing mould, squeezes
Pressing formation speed 0.7mm/s, coefficient of friction 0.10, magnesium alloy blank produce Plastic Flow shaping spoke surface configuration, and downwards
Flowing is full of meal extrusion die profile, it is pressed into precast hollow shape circular hub 9 in indirect-extrusion mould, magnesium alloy blank into
Shape temperature is maintained at 420 DEG C；Its anti-phase extruding force is maintained at 800KN；
3 die-forging formings：
The deformation velocity of material macroscopically shows as the operating rate of mould, by the good precast hollow shape circular wheel of backward extrusion
Hub 9 is put into forge die and forged and pressed in the case of 420 degree of insulation, the semi-finished product wheel hub 14 of excellent suitability for press forming.
4 die forging magnesium alloy semi-finished product wheel hubs 10 are machined out into finished product wheel hub.
Include upper male mould 1, lower punch 5 as shown in figure 3, institute's indirect-extrusion mould includes the indirect-extrusion mould and be arranged on institute
The cavity plate 3 between upper male mould 1 and the lower punch 5 is stated, and the backward extrusion blank 2 and apical ring 4 being placed in its die cavity.
As shown in figure 4, forge die includes retaining spring 6, upper male mould 7, die plate insert 8, die sleeve 11, lower punch 12, mould
Have backing plate 13, mold base 14 and top mold plate 15.
Embodiment 1
The present invention provides a kind of backward extrusion die forging method for magnesium alloy hub, and it comprises the following steps：
Step 1: magnesium alloy rod preheats：
Magnesium alloy rod is placed in main frequency furnace and preheated, the temperature of the main frequency furnace is 420 DEG C；
Step 2: mould preheats：
The indirect-extrusion mould of one heating is provided, heating-up temperature is 450 DEG C ± 5 DEG C, soaking time 20min, and preheat
The magnesium alloy rod is positioned in the die cavity of the indirect-extrusion mould；
Step 3: backward extrusion：
The indirect-extrusion mould has a upper male mould, and the magnesium alloy rod squeezes downwards when the upper male mould moves downward
Pressure, the speed of the extruding be 0.6mm/s, coefficient of friction 0.10, while fill the die cavity so that precast hollow shape circle is made
Shape wheel hub, and keeping temperature is 420 DEG C, reverse extrusion power is 80KN；
Step 4: forging and stamping processing：
Carry out forging and pressing obtained semi-finished product wheel hub under the conditions of being 420 DEG C in temperature by the precast hollow shape circular hub, it
After be machined out finished product magnesium alloy hub.
In the described backward extrusion die forging method for magnesium alloy hub, the indirect-extrusion mould include upper male mould, under it is convex
Mould and the cavity plate being arranged between the upper male mould and the lower punch.
In the described backward extrusion die forging method for magnesium alloy hub, electricity is wound with outside the cavity plate and the upper male mould
Stove silk and heat-preservation cotton.
In the described backward extrusion die forging method for magnesium alloy hub, above the magnesium alloy rod at 10mm-50mm
Thermocouple is provided with, the thermocouple is used to measure the temperature in the indirect-extrusion mould.
In the described backward extrusion die forging method for magnesium alloy hub, the magnesium alloy rod is cylinder.
In the described backward extrusion die forging method for magnesium alloy hub, the precast hollow shape circular hub is cup.
Embodiment 2
The present invention provides a kind of backward extrusion die forging method for magnesium alloy hub, and it comprises the following steps：
Step 1: magnesium alloy rod preheats：
Magnesium alloy rod is placed in main frequency furnace and preheated, the temperature of the main frequency furnace is 420 DEG C；
Step 2: mould preheats：
The indirect-extrusion mould of one heating is provided, heating-up temperature is 450 DEG C ± 5 DEG C, soaking time 20min, and preheat
The magnesium alloy rod is positioned in the die cavity of the indirect-extrusion mould；
Step 3: backward extrusion：
The indirect-extrusion mould has a upper male mould, and the magnesium alloy rod squeezes downwards when the upper male mould moves downward
Pressure, the speed of the extruding be 0.7mm/s, coefficient of friction 0.10, while fill the die cavity so that precast hollow shape circle is made
Shape wheel hub, and keeping temperature is 420 DEG C, reverse extrusion power is 80KN；
Step 4: forging and stamping processing：
Carry out forging and pressing obtained semi-finished product wheel hub under the conditions of being 420 DEG C in temperature by the precast hollow shape circular hub, it
After be machined out finished product magnesium alloy hub.
In the described backward extrusion die forging method for magnesium alloy hub, the indirect-extrusion mould include upper male mould, under it is convex
Mould and the cavity plate being arranged between the upper male mould and the lower punch.
In the described backward extrusion die forging method for magnesium alloy hub, electricity is wound with outside the cavity plate and the upper male mould
Stove silk and heat-preservation cotton.
In the described backward extrusion die forging method for magnesium alloy hub, above the magnesium alloy rod at 10mm-50mm
Thermocouple is provided with, the thermocouple is used to measure the temperature in the indirect-extrusion mould.
In the described backward extrusion die forging method for magnesium alloy hub, the magnesium alloy rod is cylinder.
In the described backward extrusion die forging method for magnesium alloy hub, the precast hollow shape circular hub is cup.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, it is of the invention and unlimited
In specific details.
Claims (6)
1. the backward extrusion die forging method for magnesium alloy hub, it is characterised in that comprise the following steps：
Step 1: magnesium alloy rod preheats：
Magnesium alloy rod is placed in main frequency furnace and preheated, the temperature of the main frequency furnace is 420 DEG C；
Step 2: mould preheats：
The indirect-extrusion mould of a heating is provided, heating-up temperature is 450 DEG C ± 5 DEG C, soaking time 20min, and is preheated described
Magnesium alloy rod is positioned in the die cavity of the indirect-extrusion mould；
Step 3: backward extrusion：
The indirect-extrusion mould has a upper male mould, and the magnesium alloy rod is pressed down against when the upper male mould moves downward,
The speed of the extruding is 0.6-0.7mm/s, coefficient of friction 0.10, while fills the die cavity and justified so that precast hollow shape is made
Shape wheel hub, and keeping temperature is 420 DEG C, reverse extrusion power is 80KN；
Step 4: forging and stamping processing：
By the precast hollow shape circular hub temperature be 420 DEG C under the conditions of carry out forging and pressing obtained semi-finished product wheel hub, it is laggard
Row machining finished product magnesium alloy hub.
2. it is used for the backward extrusion die forging method of magnesium alloy hub as claimed in claim 1, it is characterised in that the backward extruding die
Tool includes upper male mould, lower punch and the cavity plate being arranged between the upper male mould and the lower punch.
3. it is used for the backward extrusion die forging method of magnesium alloy hub as claimed in claim 2, it is characterised in that the cavity plate and institute
State and be wound with electric furnace heating wire and heat-preservation cotton outside upper male mould.
4. it is used for the backward extrusion die forging method of magnesium alloy hub as claimed in claim 3, it is characterised in that the magnesium alloy bar
Thermocouple is provided with above material at 10mm-50mm, the thermocouple is used to measure the temperature in the indirect-extrusion mould.
5. it is used for the backward extrusion die forging method of magnesium alloy hub as claimed in claim 1, it is characterised in that the magnesium alloy bar
Material is cylinder.
6. it is used for the backward extrusion die forging method of magnesium alloy hub as claimed in claim 1, it is characterised in that the precast hollow
Shape circular hub is cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889185.XA CN107598066A (en) | 2017-09-27 | 2017-09-27 | Backward extrusion die forging method for magnesium alloy hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889185.XA CN107598066A (en) | 2017-09-27 | 2017-09-27 | Backward extrusion die forging method for magnesium alloy hub |
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| Publication Number | Publication Date |
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| CN107598066A true CN107598066A (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710889185.XA Pending CN107598066A (en) | 2017-09-27 | 2017-09-27 | Backward extrusion die forging method for magnesium alloy hub |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508737A (en) * | 2019-08-26 | 2019-11-29 | 南京理工大学 | A kind of hub extrusion manufacturing process |
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| EP4144457A1 (en) * | 2021-09-03 | 2023-03-08 | Citic Dicastal Co., Ltd. | Forging process of magnesium alloy wheel hub |
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| GB1057066A (en) * | 1962-10-24 | 1967-02-01 | Reynolds Metals Co | Production of ductile metal wheels |
| CN1429717A (en) * | 2003-01-27 | 2003-07-16 | 华北工学院 | Casting extruding compound shaping method of magnesium alloy automobile hub |
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| KR20120131583A (en) * | 2011-05-26 | 2012-12-05 | 현대자동차주식회사 | Manufacture method of aluminium wheel for vehicle |
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2017
- 2017-09-27 CN CN201710889185.XA patent/CN107598066A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| GB1057066A (en) * | 1962-10-24 | 1967-02-01 | Reynolds Metals Co | Production of ductile metal wheels |
| CN1429717A (en) * | 2003-01-27 | 2003-07-16 | 华北工学院 | Casting extruding compound shaping method of magnesium alloy automobile hub |
| CN1864915A (en) * | 2006-06-13 | 2006-11-22 | 中北大学 | A labor-saving automobile hub forming method and device |
| CN101376141A (en) * | 2008-04-21 | 2009-03-04 | 河南科技大学 | Press forming method of automobile hub and matched forming mold thereof |
| KR20120131583A (en) * | 2011-05-26 | 2012-12-05 | 현대자동차주식회사 | Manufacture method of aluminium wheel for vehicle |
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Non-Patent Citations (1)
| Title |
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| 殷银银等: "镁合金轮毂的塑性成形技术", 《热加工工艺》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508737A (en) * | 2019-08-26 | 2019-11-29 | 南京理工大学 | A kind of hub extrusion manufacturing process |
| CN110508737B (en) * | 2019-08-26 | 2021-09-21 | 南京理工大学 | Wheel hub extrusion forming method |
| CN113635000A (en) * | 2021-08-27 | 2021-11-12 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| CN113635000B (en) * | 2021-08-27 | 2023-08-18 | 中国兵器工业第五九研究所 | Extrusion-rolling composite forming method for magnesium alloy ring piece |
| EP4144457A1 (en) * | 2021-09-03 | 2023-03-08 | Citic Dicastal Co., Ltd. | Forging process of magnesium alloy wheel hub |
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