CN107855394A - A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member - Google Patents

A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member Download PDF

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Publication number
CN107855394A
CN107855394A CN201711079628.5A CN201711079628A CN107855394A CN 107855394 A CN107855394 A CN 107855394A CN 201711079628 A CN201711079628 A CN 201711079628A CN 107855394 A CN107855394 A CN 107855394A
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China
Prior art keywords
spinning
cylindrical
mandrel
magnesium alloy
spinning machine
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CN201711079628.5A
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CN107855394B (en
Inventor
徐文臣
靳学泽
杨川
单德彬
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/16Spinning over shaping mandrels or formers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/16Heating or cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/18Lubricating, e.g. lubricating tool and workpiece simultaneously

Abstract

A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member, the present invention relates to cylindrical member intensifying method field.The Mg alloy thin wall cylindrical member prepared the invention solves traditional magnesium alloy spinning process is also easy to produce obvious anisotropy, causes the ring tensile strength of Mg alloy thin wall cylindrical member to be less than the technical problem of axial tensile-strength.Method:First, fixed magnesium alloy blank, preheating;2nd, it is preheated to spinning temperature;3rd, start spinning machine and carry out shear spinning;4th, the mandrel for changing spinning machine turns to, and preheating, sprays lubricant, carries out lower a time shear spinning;5th, repeat step four is until obtain the Mg alloy thin wall cylindrical member of target size.The method of the present invention can be used for the spin-forming procedure of Mg alloy thin wall cylindrical member, can effectively improve the ring mechanical property of mould pressing part.

Description

A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member
Technical field
The present invention relates to cylindrical member intensifying method field.
Background technology
With the raising to loss of weight power conservation requirement, light thin-wall revolving body member obtains in fields such as automobile, Aero-Space More and more extensive application.But during the military service of reality, not requiring nothing more than barrel-type casing component has very high size essence Degree, while require that component has certain ability for bearing internal pressure.And the most weak direction of performance is in limitation barrel-type casing component The short slab of bearing capacity.Therefore, the anisotropy of barrel-type casing component is reduced, improves the comprehensive mechanical property of component, improves cylinder Shape component internal pressure bearing capacity, has important practical significance for component lightweight.Magnesium alloy is most light metal structure material One of material, has broad application prospects.But because magnesium alloy is close-packed hexagonal structure, deformation pattern is less, low-temperature deformation When often form the very strong texture along tubing radial direction, and be difficult to eliminate using heat treatment mode merely.Therefore, how to pass through Changing spinning process method reduces the texture intensity of spinning tubing, is a urgent problem to be solved.
At present, shear spinning is shaping one of highly effective method of Mg alloy thin wall cylindrical member, this method frock is simple, High efficient and flexible, stock utilization are high, and thin-wall tube-shaped element formed thereby has good combination property, are led in Aero-Space and weapons It is used widely in domain.But at present using traditional multi-pass single direction strong spinning process manufacture thin-wall tube-shaped element relative to Initial pipe ring strengthens effect less than axially, and obvious anisotropy is produced on thin-wall tube-shaped element, limits magnesium alloy thin Wall cylindrical member military service performance.
The content of the invention
The Mg alloy thin wall cylindrical member prepared the invention solves traditional magnesium alloy spinning process be also easy to produce it is obvious respectively to The opposite sex, the ring tensile strength of Mg alloy thin wall cylindrical member is caused to be less than the technical problem of axial tensile-strength, there is provided a kind of magnesium The intersection spinning intensifying method of alloy thin-wall cylindrical member.
A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member of the present invention is carried out according to the following steps:
Step 1:Magnesium alloy blank is enclosed on the mandrel of spinning machine and fixed, by the mandrel of spinning machine and magnesium alloy base Material preheating, then in the mandrel outer surface and magnesium alloy blank outer surface even application lubricant of spinning machine;
It is described that the mandrel of spinning machine and magnesium alloy blank are preheated to 150 DEG C;
The material of steel used in the spinning roller of the spinning machine and the mandrel of press is 4Cr5MoSiV1;
Described magnesium alloy blank is enclosed on when on the mandrel of spinning machine is transition between magnesium alloy blank and the mandrel of press Coordinate;
The lubricant sprayed in the mandrel outer surface of spinning machine and magnesium alloy blank outer surface lubricates for water-based graphite Agent;
Step 2:The mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank are preheated to spinning temperature;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 200~450 DEG C;The spinning roller of the spinning machine Spinning temperature is 100~150 DEG C;
Step 3:Start spinning machine and carry out shear spinning;
Step 4:The mandrel for changing spinning machine turns to, and the mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank is pre- Heat is to spinning temperature;Carry out lower a time shear spinning;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 200~450 DEG C;The spinning roller of the spinning machine Spinning temperature is 100~150 DEG C;
Step 5:Repeat step four is until obtain the Mg alloy thin wall cylindrical member of target size.
The beneficial effects of the invention are as follows:
First, it is evenly distributed using magnesium alloy spinning cylindrical member tissue microstructure produced by the invention, crystallite dimension is more It is tiny.Because front and rear two passages spinning direction has certain angle, rear a time rotary pressure deformation can produce to preceding a time tissue Raw stronger shear action so that (mandrel rotates tissue during each passage spinning relative to traditional cylindrical member multi-pass shear spinning Direction does not change) obtain stronger thinning effect.
2nd, have using magnesium alloy spinning cylindrical member intensity produced by the invention and be obviously improved.The inventive method intersects rotation During molded, alloy blank alloy blank length increase under the extruding of the spinning roller of spinning machine, the wall thickness of alloy blank by Gradual change is thin, and the spinning roller contact portion of the surface of alloy blank and spinning machine can form helical form spinning track after each spinning;Change After becoming the mandrel steering of spinning machine, the spiral trajectory on the surface of alloy blank and the spiral of track caused by upper a time spinning Direction is different, i.e., after multiple spinning, the surface of alloy blank can produce the spinning track of cross network;Because refined crystalline strengthening is made With so that axially and radially mechanics performance is improved magnesium alloy spinning cylindrical member simultaneously.
3rd, reduced using magnesium alloy spinning cylindrical member anisotropy produced by the invention.Due to rear a time with it is preceding together with Secondary spinning is angled, the microstructure texture that a time is formed before rear a time deformation can destroy so that magnesium alloy spinning tubular Part texture attenuation, anisotropy reduce.
The process of the present invention uses for reference the principle of tandem rolling, by the rotation for changing mandrel during multi-pass spinning Direction, changes the interaction mode between spinning roller and blank in spinning process, and organization of regulation control feature and texture distribution of orientations are special Sign, improve the ring intensity of revolving parts, improve the structure property uniformity of thin-wall tube-shaped element, weaken spinning part respectively to The opposite sex, this to improve thin-wall tube-shaped element internal pressure bearing capacity and military service performance be highly beneficial.The method of the present invention can use In the spin-forming procedure of Mg alloy thin wall cylindrical member, the ring mechanical property of mould pressing part can be effectively improved.This hair It is bright to regulate and control Magnesium Alloy feature and texture distribution of orientations feature to strengthen cylindrical member ring performance, improve cylindrical member respectively to The bidirectional crossed spinning process method of the opposite sex.Do not changed using mandrel direction of rotation during the method and conventional spun of the present invention Spinning process compare, the inventive method when spinning reduction reaches 85% or so, obtain intersect spinning cylindrical member ring resist Tensile strength improves 5~10% than conventional spun technique compared to highest.
The present invention is used for the intersection rotary press modelling of Mg alloy thin wall cylindrical member.
Brief description of the drawings
Fig. 1 is the intersection spinning strengthening process schematic diagram of Mg alloy thin wall cylindrical member of the present invention;In figure 1 be spinning machine core Axle, 2 be magnesium alloy blank, and 3 be the spinning roller of spinning machine;
Fig. 2 is in the intersection spinning strengthening process of Mg alloy thin wall cylindrical member of the present invention, is closed after adjacent passage spinning in magnesium Spinning track caused by golden blank surface and spinning course bearing schematic diagram.
Embodiment
Technical solution of the present invention is not limited to the embodiment of act set forth below, in addition to each embodiment it Between any combination.
Embodiment one:A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member of present embodiment, by with Lower step is carried out:
Step 1:Magnesium alloy blank is enclosed on the mandrel of spinning machine and fixed, by the mandrel of spinning machine and magnesium alloy base Material preheating, then in the mandrel outer surface and magnesium alloy blank outer surface even application lubricant of spinning machine;
Step 2:The mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank are preheated to spinning temperature;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 200~450 DEG C;The spinning roller of the spinning machine Spinning temperature is 100~150 DEG C;
Step 3:Start spinning machine and carry out shear spinning;
Step 4:The mandrel for changing spinning machine turns to, and the mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank is pre- Heat is to spinning temperature;In magnesium alloy blank outer surface even application lubricant, lower a time shear spinning is carried out;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 200~450 DEG C;The spinning roller of the spinning machine Spinning temperature is 100~150 DEG C;
Step 5:Repeat step four is until obtain the Mg alloy thin wall cylindrical member of target size.
Embodiment two:Present embodiment is unlike embodiment one:By spinning described in step 1 The mandrel of machine is preheated to 150 DEG C.It is other identical with embodiment one.
Embodiment three:Present embodiment is unlike embodiment one or two:Will described in step 1 Magnesium alloy blank is preheated to 150 DEG C.It is other identical with embodiment one or two.
Embodiment four:Unlike one of present embodiment and embodiment one to three:Institute in step 1 The material for stating steel used in the spinning roller of spinning machine is 4Cr5MoSiV1.It is other identical with one of embodiment one to three.
Embodiment five:Unlike one of present embodiment and embodiment one to four:Institute in step 1 The material for stating steel used in the mandrel of press is 4Cr5MoSiV1.It is other identical with one of embodiment one to four.
Embodiment six:Unlike one of present embodiment and embodiment one to five:Described in step 1 It is interference fits between magnesium alloy blank and the mandrel of press that magnesium alloy blank, which is enclosed on when on the mandrel of spinning machine,.Other and tool One of body embodiment one to five is identical.
Embodiment seven:Unlike one of present embodiment and embodiment one to six:Described in step 1 It is water-based graphite in the lubricant that the mandrel outer surface of spinning machine sprays.It is other identical with one of embodiment one to six.
Embodiment eight:Unlike one of present embodiment and embodiment one to seven:Described in step 1 Lubricant in magnesium alloy blank outer surface is water-based graphite.It is other identical with one of embodiment one to seven.
Embodiment nine:Unlike one of present embodiment and embodiment one to eight:Described in step 2 200~400 DEG C of the mandrel of spinning machine and the spinning temperature of magnesium alloy blank.Other phases one of with embodiment one to eight Together.
Embodiment ten:Unlike one of present embodiment and embodiment one to nine:Described in step 4 200~400 DEG C of the mandrel of spinning machine and the spinning temperature of magnesium alloy blank.Other phases one of with embodiment one to nine Together.
Beneficial effects of the present invention are verified using following examples:
Embodiment one:
A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member of the present embodiment, is carried out according to the following steps:
Step 1:Magnesium alloy blank is enclosed on the mandrel of spinning machine and fixed, by the mandrel of spinning machine and magnesium alloy base Material preheating, then in the mandrel outer surface and magnesium alloy blank outer surface even application lubricant of spinning machine;
It is described that the mandrel of spinning machine and magnesium alloy blank are preheated to 150 DEG C;
The material of steel used in the spinning roller of the spinning machine and the mandrel of press is 4Cr5MoSiV1;
Described magnesium alloy blank is enclosed on when on the mandrel of spinning machine is transition between magnesium alloy blank and the mandrel of press Coordinate;
The lubricant sprayed in the mandrel outer surface of spinning machine and magnesium alloy blank outer surface lubricates for water-based graphite Agent;
Step 2:The mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank are preheated to spinning temperature;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 300 DEG C;The spinning of the spinning roller of the spinning machine Temperature is 150 DEG C;
Step 3:Start spinning machine and carry out shear spinning;
Step 4:The mandrel for changing spinning machine turns to, and the mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank is pre- Heat is to spinning temperature;In magnesium alloy blank outer surface even application lubricant, lower a time shear spinning is carried out;
The mandrel of the spinning machine and the spinning temperature of magnesium alloy blank are 300 DEG C;The spinning of the spinning roller of the spinning machine Temperature is 150 DEG C;
Step 5:Repeat step four is until obtain the Mg alloy thin wall cylindrical member of target size.
The present embodiment has the advantages that:
First, have using the ring intensity of the Mg alloy thin wall cylindrical member of the present embodiment production and be obviously improved.Utilize this reality The method of example is applied compared with the immovable spinning process in mandrel direction of rotation during conventional spun, the inventive method subtracts in spinning When thin rate reaches 85%, obtain intersecting spinning cylindrical member ring tensile strength than conventional spun technique compared to improving 10%;
2nd, the present embodiment can weaken tubing radial deformation texture intensity;In the prior art, Mg alloy thin wall cylindrical member When reduction reaches 85%, the ring tensile strength of Mg alloy thin wall cylindrical member and the gap of axial tensile-strength are 10%, And the ring tensile strength of Mg alloy thin wall cylindrical member and the gap of axial tensile-strength of the present embodiment production are reduced to 5%; Illustrate substantially to reduce using the Mg alloy thin wall cylindrical member anisotropy of the present embodiment production;
3rd, the crystal grain chi of the Mg alloy thin wall cylindrical member obtained by EBSD comparative analysis conventional spun Very little, in the case of reduction identical, the average grain size for the Mg alloy thin wall cylindrical member that the present embodiment method obtains is less than Conventional spun technique;Illustrate that the tissue microstructure of the Mg alloy thin wall cylindrical member of the present embodiment production is evenly distributed, crystal grain chi It is very little more tiny.

Claims (10)

  1. A kind of 1. intersection spinning intensifying method of Mg alloy thin wall cylindrical member, it is characterised in that:This method is carried out according to the following steps:
    Step 1:Magnesium alloy blank is enclosed on the mandrel of spinning machine and fixed, the mandrel of spinning machine and magnesium alloy blank is pre- Heat, then in the mandrel outer surface and magnesium alloy blank outer surface even application lubricant of spinning machine;
    Step 2:The mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank are preheated to spinning temperature;The spinning machine The spinning temperature of mandrel and magnesium alloy blank is 200~450 DEG C;The spinning temperature of the spinning roller of the spinning machine is 100~150 ℃;
    Step 3:Start spinning machine and carry out shear spinning;
    Step 4:The mandrel for changing spinning machine is turned to, and the mandrel of spinning machine, the spinning roller of spinning machine and magnesium alloy blank are preheated to Spinning temperature;In magnesium alloy blank outer surface even application lubricant, lower a time shear spinning is carried out;The core of the spinning machine The spinning temperature of axle and magnesium alloy blank is 200~450 DEG C;The spinning temperature of the spinning roller of the spinning machine is 100~150 DEG C;
    Step 5:Repeat step four is until obtain the Mg alloy thin wall cylindrical member of target size.
  2. A kind of 2. intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that step The mandrel of spinning machine is preheated to 150 DEG C described in rapid one.
  3. A kind of 3. intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that step Magnesium alloy blank is preheated to 150 DEG C described in rapid one.
  4. A kind of 4. intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that step The material of steel used in the spinning roller of spinning machine described in rapid one is 4Cr5MoSiV1.
  5. A kind of 5. intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that step The material of steel used in the mandrel of press described in rapid one is 4Cr5MoSiV1.
  6. 6. the intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that:Step 1 Described magnesium alloy blank is enclosed on when on the mandrel of spinning machine is interference fits between magnesium alloy blank and the mandrel of press.
  7. 7. the intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that:Step 1 The lubricant that the mandrel outer surface in spinning machine sprays is water-based graphite.
  8. 8. the intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that:Step 1 The lubricant in magnesium alloy blank outer surface is water-based graphite.
  9. 9. the intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that:Step 2 200~400 DEG C of the mandrel of the spinning machine and the spinning temperature of magnesium alloy blank.
  10. 10. the intersection spinning intensifying method of Mg alloy thin wall cylindrical member according to claim 1, it is characterised in that:Step 200~400 DEG C of the mandrel of four spinning machines and the spinning temperature of magnesium alloy blank.
CN201711079628.5A 2017-11-06 2017-11-06 A kind of intersection spinning intensifying method of Mg alloy thin wall cylindrical member Active CN107855394B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109985954A (en) * 2019-04-17 2019-07-09 华南理工大学 A kind of strong revolving shaping method of heat preparing magnesium alloy Power spinning

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Publication number Priority date Publication date Assignee Title
CN109985954A (en) * 2019-04-17 2019-07-09 华南理工大学 A kind of strong revolving shaping method of heat preparing magnesium alloy Power spinning

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