CN106475433A - A kind of multidirectional extrusion forming method of the electric discharge for complicated shape part - Google Patents
A kind of multidirectional extrusion forming method of the electric discharge for complicated shape part Download PDFInfo
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- CN106475433A CN106475433A CN201610890404.1A CN201610890404A CN106475433A CN 106475433 A CN106475433 A CN 106475433A CN 201610890404 A CN201610890404 A CN 201610890404A CN 106475433 A CN106475433 A CN 106475433A
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- multidirectional
- die cavity
- mould
- cavity
- electric discharge
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
- B21C25/025—Selection of materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
Abstract
A kind of multidirectional extrusion forming method of the electric discharge for complicated shape part, which is mainly：Cylindrical workpiece to be added is prepared, its branch diameter linear with a certain axis in mold cavity is identical, and the volume of the volume >=design elements of the workpiece to be added；It is placed in after above-mentioned mould is assembled in the multidirectional sintering extruder of electric discharge, pressure head is provided with the duct on the outside of the end face of cylinder workpiece to be added, the other end of each pressure head is connected with the outer two symmetrical loading hydraulic cylinders of arranged on left and right sides of upper and lower die cavity, lower furnace body tight closure is gone up afterwards, vacuumize, to upper cavity load pulses electric current, cylinder alloy sample is made to be brought rapidly up to temperature required, then it is incubated, in insulating process, the side hydraulic cylinder of the multidirectional extruder of discharging is extruded to an equal amount of extruding force of the two ends Slow loading of alloy sample.Plastic force of the present invention is little, forming speed fast, can not only prepare difficult deformation branch class part, and can improve plasticity and the toughness of product.
Description
Technical field
The present invention relates to a kind of electric field-assisted extrusion forming method.
Background technology
Difficult-to-deformation material complicated shape forging is the common part kind in aviation day field.Processed using cutting working method
Complicated shape part, production process are many, and efficiency is low, and waste of material is serious, and destroy the metal streamline shape structure of part, unsuitable
Using.
As difficult-to-deformation material plasticity is poor, using common forging method shaping easily cause the uneven of tissue and
The generation of microcosmic forging defect, has a strong impact on mechanical property and the performance of product.
Content of the invention
It is an object of the invention to provide the difficult-to-deformation material complicated shape part that a kind of plastic force is little, forming speed is fast
Discharge multidirectional extrusion forming method.In extrusion process, to deformable body material, auxiliary electric field is load pulses to the method in addition
Electric current, its targeted electronic can apply certain motive force to the dislocation in alloy, help dislocation to cross advancing obstacle, so as to
Plasticity and the toughness of alloy is improve, the rate of deformation of material is promoted, improve its microstructure and mechanical property.
Technical scheme is as follows：
First, discharge multidirectional extrusion die：
The mould includes：Upper and lower mould and upper and lower cushion block, their material are high strength graphite.Wherein, in cylinder
The die cavity of mould is located on lower surface, is die cavity corresponding with design elements top half profile in the middle part of the die cavity, wherein a certain axle
The linear branch die cavity two ends of line are provided with coupled and diameter identical top half duct, and the other end in two duct sets
On upper mould outer peripheral face.The die cavity of cylindrical lower mould corresponding with upper mould is located on upper surface, is and design zero in the middle part of the die cavity
The corresponding die cavity of part the latter half profile, the linear branch die cavity two ends of wherein a certain axis are provided with coupled and diameter phase
Same the latter half duct, the other end in two duct are located on lower mould outer peripheral face.The non-upper surface for setting die cavity of upper mould is provided with
Diameter is connected with cushion block in a cylinder above the boss less than the cylindrical boss of mode diameters；Lower mould is non-to set die cavity
Lower surface is provided with cylindrical boss of the diameter less than lower mode diameter, is connected with a cylindrical lower cushion block below the boss.On
Lower mould matched moulds i.e. both die cavities are relative to constitute complete molding cavities.
2nd, the manufacturing process of complicated shape part：
1st, cylindrical to be added workpiece is prepared, and its branch diameter linear with a certain axis in mold cavity is identical, and
And the volume of the volume >=design elements of the workpiece to be added；
2nd, the cylinder for preparing step 1 workpiece to be added is put in the upper and lower model cavity of the multidirectional extrusion die of above-mentioned electric discharge
In the duct of the linear branch die cavity of a certain axis in portion and both sides, and keep the both ends of the surface of cylinder workpiece to be added with respect in
Axisymmetrical；
3rd, will be placed in after the assembling of above-mentioned mould in the multidirectional sintering extruder of electric discharge, on the outside of the end face of cylinder workpiece to be added
Duct in be provided with pressure head, the outer two symmetrical loading hydraulic cylinder phases of arranged on left and right sides of the other end of each pressure head and upper and lower die cavity
Even, the lateral ram movement of the loading hydraulic cylinder driven mold, the two ends to alloy sample load an equal amount of pre-extrusion power,
Now lower mode cavity is acted on up and to 10～30MPa of upper cavity pressure by loading hydraulic cylinder is in close contact upper and lower die cavity,
Reach sealing, heat-conducting effect.Lower furnace body tight closure, and will discharge multidirectional sintering extruder in vacuum pumping, vacuum are gone up afterwards
Spend for 10-3Pa, prevents alloy oxidized；
4th, by raised upper surface load pulses electric current (2000～8000A) of upper cavity, making cylinder alloy sample
It is brought rapidly up to temperature required (400～2000 DEG C), then carries out 1～10min is incubated, in insulating process, multidirectional squeezing of discharging
The side hydraulic cylinder of press is an equal amount of extruding force (3～20t) to the two ends Slow loading of alloy sample by lateral pressure head
Extruded, stopped loading when hydraulic cylinder walking displacement reaches (Workpiece length to be added-design elements direction length)/2；
5th, finally multidirectional discharge sintering extruder power-off, natural cooling are lowered the temperature, after device cooling, extruder lateral
Loading hydraulic cylinder backhaul, takes out the multidirectional extrusion die of electric discharge, and takes out the product for squeezing out after blow-on.
The present invention is had the advantage that compared with prior art：
The multidirectional electric discharge structure of extrusion is simple, and its cylindrical upper and lower die cavity of band convex type is the electric discharge pressurizing unit
Main shaped portion, the lower surface with convex type upper cavity and upper surface with convex type lower mode cavity are in close contact, reach close
The effect of envelope, heat conduction and extrusion molding；The multidirectional electric discharge extrusion die is common with the multidirectional discharge sintering extruder of designed, designed
Constitute a set of new multidirectional electric discharge extrusion apparatus, in the presence of multidirectional pulse current, its targeted electronic can be closed to metal
Dislocation in gold applies certain motive force, helps dislocation to cross advancing obstacle, so that metal alloy compositions are in high temperature
Shaping different shape, the complicated shape manufactured part of size during molten state, and plasticity and the toughness of metal alloy can be improved,
Promote the rate of deformation of material, improve its microstructure and mechanical property；Extrusion die is temperature required compares non-electric field for multidirectional electric discharge
The forging and molding of auxiliary is temperature required low, the flowing during flow stress forging and molding that also far smaller than non-electric field is aided in of deformation
Stress, it is achieved thereby that device interior metal alloy low temperature crushing failure at high speed shaping under the effect of multidirectional pulse current.
Description of the drawings
Fig. 1 prepares the main view profile of the multidirectional extrusion die that discharges of cross axle for the present invention.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 prepares the main view profile before the multidirectional extrusion die extruding of discharging of cross axle for the present invention.
Fig. 4 is the B-B view of Fig. 3.
Fig. 5 prepares the main view profile after the multidirectional extrusion die extruding of discharging of cross axle for the present invention.
Fig. 6 is the C-C view of Fig. 5.
Specific embodiment
In the profile for discharging multidirectional extrusion die for preparing cross axle shown in Fig. 1 and Fig. 2, the mould includes：On
Mould 2, lower mould 3, upper cushion block 1 and lower cushion block 4, their material are high strength graphite.Wherein, in cylinder, the die cavity of mould is located at
On lower surface, it is die cavity corresponding with design elements top half profile in the middle part of the die cavity, the linear branch of wherein a certain axis
Wooden fork die cavity two ends are provided with coupled and diameter identical top half duct, and the other end in two duct is located at mould outer peripheral face
On.The die cavity of cylindrical lower mould corresponding with upper mould is located on upper surface, in the middle part of the die cavity be with outside design elements the latter half
The corresponding die cavity of shape, the linear branch die cavity two ends of wherein a certain axis are provided with coupled and diameter identical the latter half
Duct, the other end in two duct are located on lower mould outer peripheral face.The non-upper surface for setting die cavity of upper mould is provided with diameter less than upper mould
The cylindrical boss of diameter, is connected with cushion block in a cylinder above the boss；The non-lower surface for setting die cavity of lower mould is provided with
Diameter is connected with a cylindrical lower cushion block below the boss less than the cylindrical boss of lower mode diameter.Upper/lower die matched moulds is
Both die cavities are relative to constitute complete molding cavities.
Embodiment 1
Prepare 47Zr-45Ti-5Al-3V cylindrical workpiece 5 to be added, its diameter linear with a certain axis in mould
20mm is mutually all, and the length of the workpiece to be added is 80mm so as to which volume is equal to the volume of design elements；The alloy that will be prepared
Cylinder workpiece to be added is symmetrically put in the die cavity between the upper and lower mould of the multidirectional extrusion die of above-mentioned electric discharge, and keeps cylinder
The both ends of the surface of workpiece to be added are symmetrical with respect to axis, as shown in Figure 3 and Figure 4.It is many that electric discharge is positioned over after above-mentioned mould is assembled
Into sintering extruder, pressure head 6, the other end of each pressure head and upper and lower die cavity is provided with the outside of the end face of cylinder workpiece to be added
Two symmetrical loading hydraulic cylinders of outer arranged on left and right sides are connected, and the lateral ram movement of the loading hydraulic cylinder driven mold, to alloy
The two ends of sample load an equal amount of pre-extrusion power, and now lower mode cavity receives the effect of loading hydraulic cylinder up and to upper cavity
The pressure of 20MPa is in close contact upper and lower die cavity, reaches sealing, heat-conducting effect.Go up the tight closure of lower furnace body afterwards, and will put
Vacuum pumping in the multidirectional sintering extruder of electricity, vacuum is 10-3Pa.By loading 4000A arteries and veins to the raised upper surface of upper cavity
Electric current is rushed, after so that cylinder alloy sample is brought rapidly up to 800 DEG C, 10min is incubated, in insulating process, discharge multidirectional extruder
Side hydraulic cylinder an equal amount of extruding force of 10t is loaded by lateral pressure head to the two ends of alloy sample, when hydraulic cylinder is walked
Displacement stops loading when reaching 15mm, as shown in Figure 5 and Figure 6, continues insulation 5min.Finally multidirectional discharge sintering extruder is broken
Electricity, natural cooling are lowered the temperature, after the device cooling, the lateral loading hydraulic cylinder backhaul of extruder, and multidirectional electric discharge is taken out after blow-on
Extrusion die, and take out the cross axle-type alloy product after extruding.
Claims (3)
1. the multidirectional extrusion forming method of a kind of electric discharge for complicated shape part, it is characterised in that：
1) cylindrical workpiece to be added is prepared, and its branch diameter linear with a certain axis in mold cavity is identical, and should
The volume of the volume >=design elements of workpiece to be added；
2) cylinder for preparing step 1 workpiece to be added is put into certain in the middle part of the upper and lower model cavity of the multidirectional extrusion die of above-mentioned electric discharge
In the duct of the linear branch die cavity of one axis and both sides, and the both ends of the surface of cylinder workpiece to be added are kept with respect to axis
Symmetrically；
3) hole that will be placed in after the assembling of above-mentioned mould in the multidirectional sintering extruder of electric discharge, on the outside of the end face of cylinder workpiece to be added
Pressure head is provided with road, and the other end of each pressure head is connected with the outer two symmetrical loading hydraulic cylinders of arranged on left and right sides of upper and lower die cavity, should
The lateral ram movement of loading hydraulic cylinder driven mold, the two ends to alloy sample load an equal amount of pre-extrusion power, now
Lower mode cavity is acted on up and to 10～30MPa of upper cavity pressure by loading hydraulic cylinder is in close contact upper and lower die cavity, reaches
Sealing, heat-conducting effect.Lower furnace body tight closure, and will discharge multidirectional sintering extruder in vacuum pumping is gone up afterwards, and vacuum is
10-3Pa, prevents alloy oxidized；
4) by the raised upper surface load pulses 2000～8000A of electric current of upper cavity, making cylinder alloy sample rise rapidly
Then temperature carries out being incubated 1～10min to temperature required 400～2000 DEG C, in insulating process, the side of the multidirectional extruder that discharges
Extruded to hydraulic cylinder by lateral pressure head extruding force 3～20t an equal amount of to the two ends Slow loading of alloy sample, when
Hydraulic cylinder walking displacement stops loading when reaching (Workpiece length to be added-design elements direction length)/2；
5) finally multidirectional discharge sintering extruder power-off, natural cooling are lowered the temperature, after the device cooling, the lateral loading of extruder
Hydraulic cylinder backhaul, takes out the multidirectional extrusion die of electric discharge, and takes out the product for squeezing out after blow-on.
2. the multidirectional extrusion forming method mould therefor of the electric discharge for complicated shape part of claim 1, it is characterised in that：Circle
In cylindricality, the die cavity of mould is located on lower surface, is die cavity corresponding with design elements top half profile, wherein in the middle part of the die cavity
The linear branch die cavity two ends of a certain axis are provided with coupled and diameter identical top half duct, two duct another
One end is located on mould outer peripheral face, and the die cavity of cylindrical lower mould corresponding with upper mould is located on upper surface, in the middle part of the die cavity be with
The corresponding die cavity of design elements the latter half profile, the linear branch die cavity two ends of wherein a certain axis be provided with coupled and
Diameter identical the latter half duct, the other end in two duct are located on lower mould outer peripheral face, the non-upper surface for setting die cavity of upper mould
Cylindrical boss of the diameter less than mode diameters is provided with, is connected with cushion block in a cylinder above the boss；Lower mould is non-to be set
The lower surface of die cavity is provided with cylindrical boss of the diameter less than lower mode diameter, with a cylindrical lower cushion block phase below the boss
Even, upper/lower die matched moulds i.e. both die cavities are relative constitutes complete molding cavities.
3. the multidirectional extrusion forming method mould therefor of the electric discharge for complicated shape part according to claim 2, its are special
Levy and be：Upper and lower mould and upper and lower cushion block, their material are high strength graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890404.1A CN106475433A (en) | 2016-10-12 | 2016-10-12 | A kind of multidirectional extrusion forming method of the electric discharge for complicated shape part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890404.1A CN106475433A (en) | 2016-10-12 | 2016-10-12 | A kind of multidirectional extrusion forming method of the electric discharge for complicated shape part |
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| CN106475433A true CN106475433A (en) | 2017-03-08 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1682399A (en) * | 1928-08-28 | mitchell | ||
| US4758203A (en) * | 1982-10-07 | 1988-07-19 | C.L.B. Enterprises, Inc. | Metal cruciform journal forging and method of making such a forging |
| JP2003019532A (en) * | 2001-07-02 | 2003-01-21 | Mitsubishi Heavy Ind Ltd | Method and device for manufacturing metallic material of micro-structure |
| CN101053888A (en) * | 2007-02-16 | 2007-10-17 | 李之海 | Multidirection press die |
| CN104708291A (en) * | 2015-03-30 | 2015-06-17 | 北京机电研究所 | Method for precise extrusion forming of iron pedestal for railway switch |
| CN104889186A (en) * | 2015-06-18 | 2015-09-09 | 燕山大学 | Electrical field assisted forward and backward combined extrusion forming method for ZrTiAlV alloy |
| CN105568191A (en) * | 2016-03-06 | 2016-05-11 | 哈尔滨理工大学 | Device and method for pulse current assisting multi-directional forging of toughened magnesium alloy |
-
2016
- 2016-10-12 CN CN201610890404.1A patent/CN106475433A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1682399A (en) * | 1928-08-28 | mitchell | ||
| US4758203A (en) * | 1982-10-07 | 1988-07-19 | C.L.B. Enterprises, Inc. | Metal cruciform journal forging and method of making such a forging |
| JP2003019532A (en) * | 2001-07-02 | 2003-01-21 | Mitsubishi Heavy Ind Ltd | Method and device for manufacturing metallic material of micro-structure |
| CN101053888A (en) * | 2007-02-16 | 2007-10-17 | 李之海 | Multidirection press die |
| CN104708291A (en) * | 2015-03-30 | 2015-06-17 | 北京机电研究所 | Method for precise extrusion forming of iron pedestal for railway switch |
| CN104889186A (en) * | 2015-06-18 | 2015-09-09 | 燕山大学 | Electrical field assisted forward and backward combined extrusion forming method for ZrTiAlV alloy |
| CN105568191A (en) * | 2016-03-06 | 2016-05-11 | 哈尔滨理工大学 | Device and method for pulse current assisting multi-directional forging of toughened magnesium alloy |
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Application publication date: 20170308 |
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