CN109434004A - A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle - Google Patents

A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle Download PDF

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Publication number
CN109434004A
CN109434004A CN201811297912.4A CN201811297912A CN109434004A CN 109434004 A CN109434004 A CN 109434004A CN 201811297912 A CN201811297912 A CN 201811297912A CN 109434004 A CN109434004 A CN 109434004A
Authority
CN
China
Prior art keywords
axle
magnesium alloy
die
blank
wrought magnesium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811297912.4A
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Chinese (zh)
Inventor
杨柳
高安娜
官英平
段永川
顾勇飞
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Yanshan University
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Yanshan University
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Priority to CN201811297912.4A priority Critical patent/CN109434004A/en
Publication of CN109434004A publication Critical patent/CN109434004A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts
    • B21K1/12Making machine elements axles or shafts of specially-shaped cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00Arrangements for heating or cooling during processing

Abstract

The present invention discloses a kind of isothermal forging forming device of wrought magnesium alloy cross axle, including upper die holder, lower die holder, upper mold, sleeve and lower die, and upper die and lower die side opens up the first through hole for placement positioning pin;The load coil for being connected with induction heating control system is wound on the outside of upper die and lower die;Opposite type chamber is provided on upper die and lower die, type is intracavitary for placing blank.The present invention also provides a kind of isothermal forging manufacturing process of wrought magnesium alloy cross axle, specifically include that pretreatment As-extruded wrought magnesium alloy bar;The size of blank, Wire EDM base material are determined according to cross axle part size;After being surface-treated to blank, feeding molding;Blank and mold are heated and kept the temperature;Forging and molding operation is carried out to blank on a hydraulic press;Cross axle after forming is heat-treated and is finished.The present invention provides the isothermal forging forming device and its method of wrought magnesium alloy cross axle, keeps magnesium alloy forged effect good, defect is small.

Description

A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle
Technical field
The present invention relates to the plastic forming technology fields of wrought magnesium alloy, more particularly to a kind of wrought magnesium alloy cross axle Isothermal forging forming device and its method.
Background technique
Cross axle, also known as crossed joint, i.e. universal joint are the parts for realizing the transmitting of varied angle power, for needing to change It is driven the position of axis direction, it is " joint " component of the universal driving device of automobile driving system.Cross axle part is main For the multidirectional transmission connection of various machinery, often matched with shaft coupling, such as: universal-joint-pin type universal device.Since it is main The torques such as torsion are born, so carrying out intensity of certain heat treatment to improve part on the diameter of axle.
Magnesium alloy is the metal that density is minimum in practical metal, with specific strength is high, specific stiffness is good, antidetonation noise abatement performance is good The features such as, it is ideal structural metallic materials.Magnesium-alloy material mainly based on die casting, answer by high performance forging at present With seldom.The main reason is that magnesium alloy room temperature plasticity is poor, sensitive to rate of deformation, forging molding is difficult.Magnesium alloy crystal knot Structure is close-packed hexagonal, and actuatable slip system is less under room temperature, and plastic deformation ability is poor.The strain regime of flat-die forging be one to It compresses two-phase to extend, this is unfavorable to the plasticity for playing magnesium alloy.So deformation velocity should be accurately controlled when magnesium alloy forged, become Form quotient and other technological parameters.
Summary of the invention
The object of the present invention is to provide a kind of isothermal forging forming device of wrought magnesium alloy cross axle and its methods, with solution Certainly the above-mentioned problems of the prior art keeps magnesium alloy forged effect good, and defect is small.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of isothermal forging forming device of wrought magnesium alloy cross axle, including upper die holder and lower die holder, The upper die holder bottom is fixedly connected with upper mold, is nested with sleeve at the top of the lower die holder, lower die, institute are provided in the sleeve It states upper die and lower die side and offers corresponding first through hole respectively, be used for placement positioning pin in the first through hole;On described It is wound with load coil on the outside of mould and lower die, the load coil is connected with induction heating control system, the sense It answers and is connected with thermo detector on heating coil;The upper mold lower surface and lower die upper surface are respectively arranged with opposite type chamber, described Type is intracavitary for placing blank.
Optionally, the second through-hole is offered among the lower die holder, is movably set with knock-pin in second through-hole;Institute The internal diameter for stating the second through-hole is less than the internal diameter of the sleeve.
Optionally, the upper die holder bottom offers link slot, and the upper mold is fixed on the link slot by wedge block On.
Optionally, the toroidal cavity that depth is 5mm is offered on the lower die holder, the sleeve is nested in the annulus In connected in star.
The present invention also provides a kind of isothermal forging manufacturing process of wrought magnesium alloy cross axle, include the following steps:
Step 1 pretreatment: pretreatment As-extruded wrought magnesium alloy bar;
Step 2 base: the size of blank, Wire EDM base material are determined according to cross axle part size;
Step 3 feeding: after being surface-treated to blank, feeding molding;
Step 4 heating: blank and mold are heated and is kept the temperature;
Step 5 forging: forging and molding operation is carried out to blank on a hydraulic press;
Step 6 heat treatment and finishing: cross axle after forming is heat-treated and is finished.
Preferably, in step 1, the pretreatment is included in preset temperature T1Under, to As-extruded wrought magnesium alloy bar into The row time is t1Homogenizing annealing processing.
Preferably, in step 4, load coil is set outside sleeve, controls mold using temperature feedback regulating system And the temperature of blank, reach preset temperature T2After keep the temperature, soaking time t2
Preferably, in step 5, pressure maintaining when hydraulic press drives upper mold to move downwardly to default flash thickness l, the dwell time reaches To t3Backhaul afterwards, control knock-pin push mold liftout attachment, discharging.
Preferably, in step 6, the cross axle after forming is subjected to trimming, in preset temperature T3Under be heat-treated, the time For t4, surplus is removed, part requirements are reached, completes test.
The present invention achieves following technical effect compared with the existing technology:
The isothermal forging forming device structure of wrought magnesium alloy cross axle of the present invention is simple, easy to use, with of the invention The forging forming method carried out based on device has given full play to the high-temp plastic of magnesium alloy, reduces forming force when forging, And significantly improve the service performance of magnesium alloy.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings Obtain other attached drawings.
Fig. 1 is inventive die main view section simplified schematic diagram;
Fig. 2 is the main view diagrammatic cross-section of lower die holder;
Fig. 3 is the main view diagrammatic cross-section of lower die;
Fig. 4 is cross axle simplified schematic diagram of the present invention;
In figure: 1, wedge block, 2, load coil, 3, induction heating control system, 4, thermo detector, 5, knock-pin, 6, Lower die holder, 7, positioning pin, 8, lower die, 9, blank, 10, sleeve, 11, upper mold, 12, upper die holder, 6-1, positioning groove, 6-2, ejection Rod aperture, 8-1, drag chamber, 8-2, dowel hole.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of isothermal forging forming device of wrought magnesium alloy cross axle and its methods, with solution Certainly the above-mentioned problems of the prior art keeps magnesium alloy forged effect good, and defect is small.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real Applying mode, the present invention is described in further detail.
The pretreatment of homogenizing annealing is carried out to As-extruded wrought magnesium alloy bar, measures the type chamber ruler of upper mold or lower die It is very little, the general volume of cross forging shaft is calculated, the volume of required blank is calculated using plastic deformation constancy of volume, incompressibility, due to Blank is cylinder, and then can obtain the length of required cylinder blank.The base in electric spark wire cutting machine.Utilize sand paper pair Blank is surface-treated, and the upper and lower surface for blank of polishing keeps its flat and smooth, to guarantee to be placed into drag chamber center Shi Buhui inclination.
The present invention provides a kind of isothermal forging forming device of wrought magnesium alloy cross axle, as shown in Figs 1-4, device master It to include upper die holder 12, wedge block 1, upper mold 11, blank 9, sleeve 10, positioning pin 7, lower die 8, lower die holder 6, knock-pin 5, thermometric Meter 4, load coil 2 and induction heating control system 3.Wherein, upper mold 11 is placed by the positioning device of wedge block 1 On die holder 12, sleeve 10 is fixed on lower die holder 6 by circular ring type groove, and groove is the positioning groove 6-1 that depth is 5mm, set It is interference fit between cylinder 10 and circular ring type groove, lower die 8 is placed on lower die holder 6 along sleeve 10, avoids in forging process Middle mold movement causes mismatch.There is a corresponding circular first through hole in upper mold 11 and lower die 8, is diameter dimension For the dowel hole 8-2 of φ 6mm, mismatch is avoided to guarantee the accurate molding of upper mold 11 Yu lower die 8 for placement positioning pin 7. Cylinder blank is placed at the center drag chamber 8-1, hydraulic press chopping block drives upper die holder to move down, and keeps upper mold 11 downward It is moved at the 1-2mm of blank upper surface.Induction of the internal diameter greater than the ceramic material of mold outer diameter is swathed in upper/lower die periphery Heating coil 2, cross sectional shape are hollow circular loop coil, are connected with induction heating control system 3, which adopts With power frequency electromagnetic induction heating, it is heated by adjusting the frequency of control system, power, voltage and conduction time to control The temperature and heating zone range of blank and mold.Ejection rod aperture 6-2 is offered below lower die holder 6, is the second through-hole, through-hole Interior to be equipped with 5 device of knock-pin, knock-pin 5 is connected with the ejecting mechanism of former, and 5 size of knock-pin is less than lower mode diameter ruler It is very little, it is clearance fit between knock-pin 5 and lower die holder 6.
Specifically, upper mold 11 is put by wedge block 1 in magnesium alloy cross axle isothermal forging mold main view section simplified schematic diagram It sets on upper die holder 12, sleeve 10 is fixed on lower die holder 6 by circular ring type groove, and lower die 8 is placed into lower die holder 6 along sleeve On.It will be placed at drag chamber center by surface treatment blank 9, the chopping block of hydraulic press drives upper die holder 12 to move down, It is displaced downwardly to upper mold 11 at 9 upper surface 1-2mm of blank, and passes through 7 precise positioning of positioning pin between upper and lower mould.In upper/lower die Periphery swathes the ceramic heat induction coil 2 that internal diameter is greater than mold outer diameter, is connected with control system 3.To mold and blank into Row heating and isothermal holding make mold and the inside of blank 9 reach preset temperature.5 device of knock-pin is equipped with below lower die holder 6, Knock-pin 5 is connected with the ejecting mechanism of former.The ejecting mechanism of former makes the upper surface of knock-pin 5 Yu lower die holder 6 The lower surface of either lower die 8 is concordant, when hydraulic press drives upper mold 11 to move downwardly to default flash thickness l, pressure maintaining t3After return Journey, knock-pin 5 push mold liftout attachment, discharging.Cross axle after forming is heat-treated and is finished, after forming Cross axle carries out trimming, removes surplus, reaches part requirements.
Embodiment 1
Certain cross axle, length L are 27mm, and the outer diameter φ 15mm of central through hole, internal diameter is φ 6.5mm, cross The radius of each rib rounded corner of axis is R=0.5mm, and the radius of circular arc rounded corner is R=0.3mm, as shown in Figure 2.Material is Mg- Mn- (RE) is magnesium-rare earth, and the present embodiment is through the following steps that realize:
Step 1, pretreatment: being that φ 15mm As-extruded wrought magnesium alloy bar is annealed to diameter at 350 DEG C, when Between be 4h (air-cooled).
Step 2, base: drawing the three-dimensional figure of cross axle in proe, is measured by analysis
VCross axle=1847.09mm3, VOverlap=2155.073mm3, then formula is substituted intoObtain VBlank= 2565.45mm3.Using Wire EDM base, having a size of 15 × 14.5mm of φ.
Step 3, blanking: being surface-treated blank, keeps the upper and lower surface of blank flat and smooth, it is smoothly placed To drag chamber center, after feeding, drives upper die holder to move downward by chopping block, move downwardly to upper mold on blank upper surface At square 1-2mm, carry out precise positioning by positioning pin between upper and lower mould.
Step 4, heating: the ceramic heat coil swathed using temperature feedback regulating system control mold periphery, to blank It is heated and is kept the temperature with mold.Heating temperature is 400 DEG C, keeps the temperature 15min.
Step 5, forging: carrying out forging and molding operation to blank on a hydraulic press, and hydraulic press drives upper mold to move downwardly to When flash thickness is 2mm, backhaul after pressure maintaining 5s-10s, knock-pin pushes mold liftout attachment, discharging.
Step 6, heat treatment and finishing: the cross axle after forming is heat-treated and is finished, by ten after forming Word axis carries out trimming, and heat treatment temperature is 400 DEG C, time 2h, removes surplus, reaches part requirements.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments Illustrate to be merely used to help understand method and its core concept of the invention;At the same time, for those skilled in the art, according to According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification It should not be construed as limiting the invention.

Claims (9)

1. a kind of isothermal forging forming device of wrought magnesium alloy cross axle, it is characterised in that: including upper die holder and lower die holder, institute It states upper die holder bottom and is fixedly connected with upper mold, be nested with sleeve at the top of the lower die holder, lower die is provided in the sleeve, it is described Upper die and lower die side offers corresponding first through hole respectively, is used for placement positioning pin in the first through hole;The upper mold It is wound with load coil with lower die outside, the load coil is connected with induction heating control system, the induction Thermo detector is connected on heating coil;The upper mold lower surface and lower die upper surface are respectively arranged with opposite type chamber, the type It is intracavitary to be used to place blank.
2. the isothermal forging forming device of wrought magnesium alloy cross axle according to claim 1, it is characterised in that: under described The second through-hole is offered among die holder, is movably set with knock-pin in second through-hole;The internal diameter of second through-hole is less than The internal diameter of the sleeve.
3. the isothermal forging forming device of wrought magnesium alloy cross axle according to claim 1, it is characterised in that: on described Die holder bottom offers link slot, and the upper mold is fixed on the link slot by wedge block.
4. the isothermal forging forming device of wrought magnesium alloy cross axle according to claim 1, it is characterised in that: under described The toroidal cavity that depth is 5mm is offered on die holder, the sleeve is nested in the toroidal cavity.
5. a kind of isothermal forging manufacturing process of wrought magnesium alloy cross axle, characterized by the following steps:
Step 1 pretreatment: pretreatment As-extruded wrought magnesium alloy bar;
Step 2 base: the size of blank, Wire EDM base material are determined according to cross axle part size;
Step 3 feeding: after being surface-treated to blank, feeding molding;
Step 4 heating: blank and mold are heated and is kept the temperature;
Step 5 forging: forging and molding operation is carried out to blank on a hydraulic press;
Step 6 heat treatment and finishing: cross axle after forming is heat-treated and is finished.
6. the isothermal forging manufacturing process of wrought magnesium alloy cross axle according to claim 5, it is characterised in that: step 1 In, the pretreatment is included in preset temperature T1Under, is carried out for t the time to As-extruded wrought magnesium alloy bar1Homogenizing annealing Processing.
7. the isothermal forging manufacturing process of wrought magnesium alloy cross axle according to claim 5, it is characterised in that: step 4 In, load coil is set outside sleeve, the temperature of mold and blank is controlled using temperature feedback regulating system, reaches default Temperature T2After keep the temperature, soaking time t2
8. the isothermal forging manufacturing process of wrought magnesium alloy cross axle according to claim 5, it is characterised in that: step 5 In, pressure maintaining when hydraulic press drives upper mold to move downwardly to default flash thickness l, the dwell time reaches t3Backhaul afterwards, control ejection Bar pushes mold liftout attachment, discharging.
9. the isothermal forging manufacturing process of wrought magnesium alloy cross axle according to claim 5, it is characterised in that: step 6 In, the cross axle after forming is subjected to trimming, in preset temperature T3Under be heat-treated, time t4, surplus is removed, reaches zero Part requirement, completes test.
CN201811297912.4A 2018-11-02 2018-11-02 A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle Pending CN109434004A (en)

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Application Number Priority Date Filing Date Title
CN201811297912.4A CN109434004A (en) 2018-11-02 2018-11-02 A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle

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Application Number Priority Date Filing Date Title
CN201811297912.4A CN109434004A (en) 2018-11-02 2018-11-02 A kind of the isothermal forging forming device and its method of wrought magnesium alloy cross axle

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2002907A1 (en) * 1968-02-29 1969-10-31 Awaya Masaharu
CN2865895Y (en) * 2006-01-11 2007-02-07 重庆工学院 Magnesium alloy isothermal forming mould
JP2008195984A (en) * 2007-02-09 2008-08-28 Japan Steel Works Ltd:The Method for producing high strength metallic material
JP2010000516A (en) * 2008-06-19 2010-01-07 Kagoshima Prefecture Precision forging method of magnesium alloy
CN102581193A (en) * 2011-12-15 2012-07-18 广东工业大学 Magnesium alloy precision forging die and magnesium alloy precision forging process
CN103433416A (en) * 2013-09-23 2013-12-11 哈尔滨工业大学 AZ80A magnesium alloy engine case isothermal forging forming mould and method
CN103736894A (en) * 2014-01-02 2014-04-23 中南大学 Isothermal forging die and forging technology thereof of magnesium alloy die forge piece of step type structure
CN204565022U (en) * 2015-02-13 2015-08-19 朱兴发 The all solid state variable frequency induction heater of isothermal forging upper/lower die
CN105397010A (en) * 2015-12-14 2016-03-16 哈尔滨工业大学 Isothermal die forging forming die and method for rare earth magnesium alloy thin webbed supporting fork
CN107127282A (en) * 2017-05-15 2017-09-05 北京科技大学 A kind of isothermal forging method of the high muscle thin web plate class part of magnesium alloy

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2002907A1 (en) * 1968-02-29 1969-10-31 Awaya Masaharu
CN2865895Y (en) * 2006-01-11 2007-02-07 重庆工学院 Magnesium alloy isothermal forming mould
JP2008195984A (en) * 2007-02-09 2008-08-28 Japan Steel Works Ltd:The Method for producing high strength metallic material
JP2010000516A (en) * 2008-06-19 2010-01-07 Kagoshima Prefecture Precision forging method of magnesium alloy
CN102581193A (en) * 2011-12-15 2012-07-18 广东工业大学 Magnesium alloy precision forging die and magnesium alloy precision forging process
CN103433416A (en) * 2013-09-23 2013-12-11 哈尔滨工业大学 AZ80A magnesium alloy engine case isothermal forging forming mould and method
CN103736894A (en) * 2014-01-02 2014-04-23 中南大学 Isothermal forging die and forging technology thereof of magnesium alloy die forge piece of step type structure
CN204565022U (en) * 2015-02-13 2015-08-19 朱兴发 The all solid state variable frequency induction heater of isothermal forging upper/lower die
CN105397010A (en) * 2015-12-14 2016-03-16 哈尔滨工业大学 Isothermal die forging forming die and method for rare earth magnesium alloy thin webbed supporting fork
CN107127282A (en) * 2017-05-15 2017-09-05 北京科技大学 A kind of isothermal forging method of the high muscle thin web plate class part of magnesium alloy

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