CN106311783B - A kind of shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe - Google Patents
A kind of shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe Download PDFInfo
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- CN106311783B CN106311783B CN201510337557.9A CN201510337557A CN106311783B CN 106311783 B CN106311783 B CN 106311783B CN 201510337557 A CN201510337557 A CN 201510337557A CN 106311783 B CN106311783 B CN 106311783B
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Abstract
The invention discloses a kind of shaped device and its moulding process of super-pressure hydrostatic extrusion magnesium alloy pipe, it is overall to use horizontal type structure, including pressurization cylinder, recipient, the first pressure matchmaker swapdisk, the second pressure matchmaker swapdisk, the 3rd pressure matchmaker swapdisk, extrusion die, the first heating mantle, the second heating mantle and the high-pressure hydraulic pump with extrusion axis.Its pressurization cylinder, recipient, pressure matchmaker swapdisk, mould and high-pressure and hydraulic are each attached between walking beam and fixed beam, and walking beam is connected with fixed beam by Zhang Lizhu.Pressurization cylinder be arranged in parallel and is located in the same horizontal plane with recipient.Because extrusion axis is located in pressurization cylinder, and blank is located in recipient, the stroke of recipient and the size of blank can increase, and the longer magnesium alloy pipe of length can be obtained by carrying out hydrostatic extrusion processing in shaped device by moulding process, can improve production efficiency.
Description
Technical field
The invention belongs to technical field of metal formation, and in particular to a kind of shaping of super-pressure hydrostatic extrusion magnesium alloy pipe
Device and its moulding process.
Background technology
Magnesium alloy have high specific stiffness, specific strength, thermal diffusivity are good, machining property is excellent, effectiveness is good,
Reclaim the advantages that easy, gradually show up prominently in fields such as national defence, automobile, electronics, future development has a high potential.Magnesium
Alloy pipe is one of widest application form of magnesium alloy, magnesium alloy pipe meaning weight of the exploitation with more preferable mechanical property
Greatly.
The method of common processing magnesium alloy part is cutting, but machining expends raw material, and stock utilization is low；One
A little complex-shaped parts can be manufactured by the way of die casting, but different degrees of casting flaw easily occurs in casting, due to casting
The limitation of technique, cast properties are often difficult to meet requirement；Multi-pass Equal Channel Angular Pressing（ECAE）, semi-solid forming etc. it is new
Technique can increase substantially the mechanical property of magnesium alloy parts, but it has technology controlling and process difficulty, equipment investment is huge, produces
The deficiencies such as efficiency is low.
Magnesium alloy normal temperature plasticity is very poor, and hydrostatic extrusion forming technique is remarkably improved the plasticity of magnesium alloy, reaches magnesium alloy
It is the preferable mode of processing low-plasticity material to superplasticity.Magnesium alloy pipe is produced using hydrostatic extrusion forming technique, not only may be used
To reduce the consumption of raw material, and obtained tubing dense structure's property is more preferable, and grain structure is more tiny, and mechanical property is more excellent
More.Hydrostatic extrusion moulding process is it has been reported that but be mainly used in wire rod and bar, easy to operate, mistake corresponding with technique at present
The hydrostatic extrusion shaping of the controllable tubing of journey（The especially expanding and shaping of tubing）Device, do not see but.
Chinese Patent Application No. is CN201310108301.1 patent of invention, discloses a kind of mould with core rod, can
To carry out the expanding extruding of magnesium alloy pipe and shrink to extrude.But extrusion billet and extrusion axis are respectively positioned in recipient, extrusion axis
Stroke and charge length can be shorter by a definite limitation, the length of plastic magnesium alloy pipe.
The content of the invention
It is an object of the invention to provide a kind of shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe and its shaping work
Skill, solve the problems, such as that magnesium alloy materials are difficult to plastic forming and hydrostatic extrusion shaping magnesium alloy pipe length is shorter.
The technical solution for realizing the object of the invention is：A kind of shaping dress of super-pressure hydrostatic extrusion magnesium alloy pipe
Put, it is characterised in that：It is overall to use horizontal type structure, including pressurization cylinder, recipient, the first pressure matchmaker swapdisk, second pressure matchmaker's exchange
Disk, the 3rd pressure matchmaker swapdisk, extrusion die, the first heating mantle, the second heating mantle and the high-pressure hydraulic pump with extrusion axis.
Described pressurization cylinder one end is connected with first pressure matchmaker's swapdisk, and the other end is connected with second pressure matchmaker's swapdisk, the second pressure
Matchmaker exchanges disk center and is provided with through hole, and central through hole of the extrusion axis through second pressure matchmaker's swapdisk stretches into pressurization cylinder；Pressurization cylinder and extruding
Cylinder be arranged in parallel, and in same level；Described recipient one end is connected with extrusion die, and the other end and the 3rd pressure matchmaker hand over
Removable disk connects, and first pressure matchmaker's swapdisk is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder is in communication with the outside, the 3rd pressure matchmaker
Swapdisk is provided with a L-shaped through hole so that the inner chamber of recipient is in communication with the outside, the extraneous communications ports of two L-shaped through holes
Between be provided with steel pipe, steel pipe both ends are connected by the extraneous communications ports of hydraulic fitting and two L-shaped through holes respectively；First adds
Hot jacket is arranged on the outer wall of extrusion die, covering recipient and the end face of extrusion die connection end；Second heating is set on crowded
The outer wall of pressure cylinder, cover the end face of the connection end of extrusion die and recipient.
Also include hollow steel bushing, hollow steel is set on supercharging tube inner chamber；The structure and size of recipient and pressurization cylinder are complete
It is identical.
The extraneous communications ports of L-shaped through hole on first pressure matchmaker's swapdisk are led to the L-shaped on the 3rd pressure matchmaker's swapdisk
The extraneous communications ports opening in hole is relative so that joint steel pipe distance is most short.
Also include the first sealing system, the second sealing system, the 3rd sealing system and the 4th sealing system, pressurization cylinder and
One pressure matchmaker's swapdisk junction is provided with the first sealing system, and pressurization cylinder and second pressure matchmaker's swapdisk junction are provided with the second sealing and are
System, recipient and the 3rd pressure matchmaker's swapdisk junction are provided with the 3rd sealing system, extrusion die and recipient junction provided with the
Four sealing systems, the sealing system are O-ring seal and metal triangular pad, by the sealing system, realize static seal.
The extruding shaft connection place for stating the second pressure matchmaker swapdisk and hydraulic system is provided with sealing ring, realizes dynamic sealing.
Second pressure matchmaker's swapdisk is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder is in communication with the outside, and the L-shaped is led to
The extraneous communications ports in hole are connected by hydraulic fitting with hydraulic tube.
The extrusion die includes upper mould, core rod, lower mould and core base；Recipient is stretched into described upper mould one end, with squeezing
Pressure cylinder is connected, and the other end is connected with one end of lower mould, and upper die and lower die form hollow cylinder；Core base one end is provided with boss,
The boss stretches into the other end of lower mould, and with its interference fits.The boss of core base is provided with groove, and core rod is arranged on
State in hollow cylinder, core rod bottom is fixed in the groove of the boss of the core base, and mould is stretched on head.Ensure core rod and
Core base is coaxial.
First heating mantle, the second heating mantle use armored ceramic resistor silk heating mantle, are entered using K-type thermocouple
Trip temperature measures, and different heating-up temperatures is respectively adopted in the first heating mantle, the second heating mantle.
Also including frame, frame includes the first fixed beam, the second fixed beam, the 3rd fixed beam, walking beam and tension force post, according to
Secondary parallel interval sets the first fixed beam, the second fixed beam, the 3rd fixed beam and walking beam.First fixed beam and movable Liangping
OK, first pressure matchmaker's swapdisk and the 3rd pressure matchmaker's swapdisk are separately fixed in the first fixed beam, and second pressure matchmaker's swapdisk is fixed on
In second fixed beam, high-pressure hydraulic pump one end is fixed in the second fixed beam, and the other end is fixed in the 3rd fixed beam, extrusion die
The core base of tool is fixed on walking beam.Connected between first fixed beam, the second fixed beam by tension force post, second fixes
Connected by tension force post between beam, the 3rd fixed beam, connected between the first fixed beam and walking beam by tension force post.
A kind of moulding process of super-pressure hydrostatic extrusion magnesium alloy pipe, step are as follows：1. magnesium alloy blank is carried out equal
Heat treatment is homogenized, according to required size of pipe and tubing, magnesium alloy blank one end is processed, and lubrication is coated on blank end face
Fat or lubricating oil；2. when expanding extruding pipe fitting, core rod is loaded into core base, core base loads lower mould, under upper mould loads
Mould, and ensure core base, core rod, lower mould and the certain axiality of upper mould；3. using hydraulic extrusion press by step 1. middle institute
The machined one end of the magnesium alloy blank stated is got into mould, makes to produce certain pretightning force between the two；4. pacify at upper mould
The 3rd sealing system is filled, the magnesium alloy blank other end is put in recipient；5. the first heating is loaded onto at upper die and lower die respectively
Set and recipient load onto the second heating mantle；6. using the low pressure of hydraulic system, i.e., less than 70 MPa, oil pump is by extrusion medium, note
Full pressurization cylinder and recipient；7. checking sealing, need to keep being pressurized cylinder pressure 20MPa, 30Min, pressure stability, fluctuate compared with
It is small；8. the first heating mantle electrified regulation at upper die and lower die is incubated 2h to 220 DEG C of design temperature；The second heating on recipient
Electrified regulation is covered to 200 DEG C of design temperature, is incubated 2h；9. extrusion axis compression extruding is promoted by the high-pressure hydraulic pump of hydraulic system
Medium produces more than 400MPa super-pressure, and magnesium alloy blank is expanded extrusion, tube forming under hydrostatic pressure；10. extruding knot
Shu Hou, hydraulic system is unloaded, cylinder and extrusion die cooling to be extruded, extrusion die is dismantled, obtains magnesium alloy pipe.
Compared with prior art, its remarkable advantage is the present invention：（1）The super-pressure hydrostatic that magnesium alloy pipe can be achieved is squeezed
It is molded；（2）The expanding and shaping of magnesium alloy pipe can be achieved；（3）The contraction shaping of magnesium alloy pipe can be achieved；（4）It is plastic
The length of magnesium alloy pipe is longer；（5）The magnesium alloy pipe excellent in mechanical performance of manufacture, dimensional accuracy is high, surface quality is good；
（6）Easy to operate, production process is controllable, and danger coefficient is low, and productive temp is guaranteed, and precision is high, and reliability is high.
Brief description of the drawings
Fig. 1 is the shaped device overall structure diagram of the super-pressure hydrostatic extrusion magnesium alloy pipe of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
With reference to Fig. 1, a kind of shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe is overall to use horizontal type structure, including
Pressurization cylinder 5, recipient 22, first press matchmaker swapdisk 2, second to press matchmaker's swapdisk the 7, the 3rd to press matchmaker's swapdisk 21, extrusion die, the
One heating mantle 14, the second heating mantle 18 and the high-pressure hydraulic pump 10 with extrusion axis 9.
Described one end of pressurization cylinder 5 is connected with the first pressure matchmaker swapdisk 2, and the other end is connected with the second pressure matchmaker swapdisk 7, and second
The center of pressure matchmaker swapdisk 7 is provided with through hole, and central through hole of the extrusion axis 9 through the second pressure matchmaker swapdisk 7 stretches into pressurization cylinder 5.Pressurization cylinder 5
Hollow steel bushing 4 is provided with inner chamber, is advantageous to the quickly inner chamber full of pressurization cylinder 5 and recipient 22 of extrusion medium 19.Pressurization cylinder 5
It is be arranged in parallel with recipient 22, and in same level.Described one end of recipient 22 is connected with extrusion die, the other end with
3rd pressure matchmaker swapdisk 21 connects, and the first pressure matchmaker swapdisk 2 is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder 5 and the external world
Connection, the 3rd pressure matchmaker swapdisk 21 are provided with a L-shaped through hole so that the inner chamber of recipient 22 is in communication with the outside, and two L-shaped are led to
It is provided with steel pipe 24 between the extraneous communications ports in hole, the both ends of steel pipe 24 pass through hydraulic fitting 23 and two L-shaped through holes respectively
Extraneous communications ports are connected.First heating mantle 14 is arranged on the outer wall of extrusion die, and its original position is the end face of recipient 22,
The end face is recipient 22 and the end face of extrusion die connection end；Second heating mantle 18 is arranged on the outer wall of recipient 22, and
Its original position is extrusion die and the end face of the connection end of recipient 22.
The extraneous communications ports of L-shaped through hole on the first pressure matchmaker swapdisk 2 and the L-shaped on the 3rd pressure matchmaker swapdisk 21
The extraneous communications ports opening of through hole is relative so that joint steel pipe 24 is apart from most short.
The structure and size of recipient 22 are completely the same with pressurization cylinder 5, and both have interchangeability.
Pressurization cylinder 5 and first presses the junction of matchmaker's swapdisk 2 to be provided with the first sealing system 3, and pressurization cylinder 5 exchanges with the second pressure matchmaker
The junction of disk 7 is provided with the second sealing system 6, and recipient 22 and the 3rd presses the junction of matchmaker's swapdisk 21 to be provided with the 3rd sealing system
16, extrusion die is provided with the 4th sealing system 20 with the junction of recipient 22, and the sealing system is O-ring seal and metal three
Angle is padded, and by the sealing system, realizes static seal.Second pressure matchmaker swapdisk 7 and the junction of extrusion axis 9 of hydraulic system are provided with
Sealing ring, realize dynamic sealing.
Second pressure matchmaker swapdisk 7 is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder 5 is in communication with the outside, the L-shaped
The extraneous communications ports of through hole are connected by hydraulic fitting 23 with hydraulic tube 8.
The extrusion die includes upper mould 15, core rod 13, lower mould 12 and core base 11；Described one end of upper mould 15 is stretched into crowded
Pressure cylinder 22, it is connected with recipient 22, the other end is connected with one end of lower mould 12, and upper mould 15 and lower mould 12 form hollow cylinder；Mould
The one end of core base 11 is provided with boss, and the boss stretches into the other end of lower mould 12, and with its interference fits.Core base 11 it is convex
Platform is provided with groove, and core rod 13 is arranged in above-mentioned hollow cylinder, and the bottom of core rod 13 is fixed on the boss of the core base 11
Groove in, mould 15 is stretched on head.Ensure that core rod 13 and core base 11 are coaxial.
First heating mantle 14 and the second heating mantle 18 use armored ceramic resistor silk heating mantle, use K-type thermocouple
Temperature survey is carried out, different heating-up temperatures is respectively adopted in the first heating mantle 14 and the second heating mantle 18.
Also include frame 1, frame 1 includes the first fixed beam 1-1, the second fixed beam 1-2, the 3rd fixed beam 1-3, walking beam
1-4 and tension force post 1-5, successively the first fixed beam 1-1 of parallel interval setting, the second fixed beam 1-2, the 3rd fixed beam 1-3 and work
Dynamic beam 1-4.First fixed beam 1-1 is parallel with walking beam 1-4, and the first pressure matchmaker swapdisk 2 and the 3rd pressure matchmaker swapdisk 21 are solid respectively
It is scheduled on the first fixed beam 1-1, the second pressure matchmaker swapdisk 7 is fixed on the second fixed beam 1-2, and the one end of high-pressure hydraulic pump 10 is fixed
On the second fixed beam 1-2, the other end is fixed on the 3rd fixed beam 1-3, and the core base 11 of extrusion die is fixed on activity
On beam 1-4.Consolidated between first fixed beam 1-1, the second fixed beam 1-2 by the 1-5 connections of tension force post, the second fixed beam 1-2, the 3rd
Determine to pass through the 1-5 connections of tension force post between the first fixed beam 1-1 and walking beam 1-4 by the 1-5 connections of tension force post between beam 1-3.
Reference picture 1, a kind of shaped device and its moulding process of super-pressure hydrostatic extrusion magnesium alloy pipe, uses step bag
Include：1. carrying out homogenization heat treatment to magnesium alloy blank 17, according to required size of pipe and tubing, the one end of magnesium alloy blank 17 is carried out
Processing, and lubricating grease or lubricating oil are coated on blank end face；2. when expanding extruding pipe fitting, core rod 13 is loaded into core base
11, core base 11 loads lower mould 12, and upper mould 15 loads lower mould 12, and ensure core base 11, core rod 13, lower mould 12 and on
The certain axiality of mould 15；3. using hydraulic extrusion press by step 1. described in the machined one end of magnesium alloy blank 17 get into
In upper mould 15, make to produce certain pretightning force between the two；4. the 3rd sealing system 16 is installed at upper mould 15, by magnesium alloy base
Expect that 17 other ends are put in recipient 22；5. the first heating mantle 14 is loaded onto at upper mould 15, lower mould 12 respectively and recipient 22 fills
Upper second heating mantle 18；6. use the low pressure of hydraulic system（Less than 70 MPa）Extrusion medium 19 is filled the He of pressurization cylinder 5 by oil pump
Recipient 22；7. checking sealing, pressure 20MPa in pressurization cylinder 5 need to be kept, 30Min, pressure stability, is fluctuated smaller；8. upper mould
15th, the electrified regulation of the first heating mantle 14 at lower mould 12 is incubated 2h to 220 DEG C of design temperature；The second heating on recipient 22
18 electrified regulations are covered to 200 DEG C of design temperature, are incubated 2h；9. extrusion axis 9 is promoted to press by the high-pressure hydraulic pump 10 of hydraulic system
Contracting extrusion medium 19 produces more than 400MPa super-pressure, and magnesium alloy blank 17 is expanded extrusion under hydrostatic pressure, tubing into
Type；After 10. extruding terminates, hydraulic system is unloaded, cylinder 22 and extrusion die cooling to be extruded, extrusion die is dismantled, obtains magnesium alloy
Tubing.
Extrusion forming is shunk if desired for magnesium alloy pipe, extrusion die is changed to shrink extrusion die, repeats the above steps,
Magnesium alloy blank is retracted extrusion, tube forming.
The course of work
First heating mantle 14 and the second heating mantle 18 are heated separately to preset temperature, and are incubated the regular hour.Utilize
High-pressure hydraulic pump 10 promote extrusion axis 9, extrusion axis 9 compress extrusion medium 19 so that in pressurization cylinder 5 extrusion medium 19 of intracavitary by
Gradually establish high pressure.Pressurization cylinder 5 connects with the extrusion medium 19 in recipient 22, and now the pressure in recipient 22 gradually increases
It is high.Magnesium alloy blank 17 positioned at the inner chamber of recipient 22 is extruded to the core rod 13 of extrusion die in the presence of hydrostatic pressure
The passage formed with upper mould 15（That is calibrating strap）In, magnesium alloy pipe shaping, enter in the lower mould 12 of extrusion die.Due to this
The extrusion axis 9 of device is located in pressurization cylinder 5, and blank is located in recipient 22, and the stroke of recipient and the size of blank are equal
It can increase, so as to obtain the longer magnesium alloy pipe of length.
Embodiment 1
A kind of shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe, it is overall to use horizontal type structure, including frame 1, increasing
Pressure cylinder 5, recipient 22, first press matchmaker's swapdisk 2, second to press matchmaker's swapdisk the 7, the 3rd to press matchmaker's swapdisk 21, extrusion die, first
Heating mantle 14, the second heating mantle 18 and the high-pressure hydraulic pump 10 with extrusion axis 9.
Frame 1 includes the first fixed beam 1-1, the second fixed beam 1-2, the 3rd fixed beam 1-3, walking beam 1-4 and tension force post
1-5, successively parallel interval the first fixed beam 1-1, the second fixed beam 1-2, the 3rd fixed beam 1-3 and walking beam 1-4 are set.First
Fixed beam 1-1 is parallel with walking beam 1-4, and the first pressure matchmaker swapdisk 2 and the 3rd pressure matchmaker swapdisk 21 are separately fixed at the first fixation
On beam 1-1, the second pressure matchmaker swapdisk 7 is fixed on the second fixed beam 1-2, and the one end of high-pressure hydraulic pump 10 is fixed on the second fixed beam
On 1-2, the other end is fixed on the 3rd fixed beam 1-3, and extrusion die is fixed on walking beam 1-4.First fixed beam 1-1,
By the 1-5 connections of tension force post between two fixed beam 1-2, pass through tension force post 1-5 between the second fixed beam 1-2, the 3rd fixed beam 1-3
Connection, passes through the 1-5 connections of tension force post between the first fixed beam 1-1 and walking beam 1-4.
Described one end of pressurization cylinder 5 is connected with the first pressure matchmaker swapdisk 2, and the other end is connected with the second pressure matchmaker swapdisk 7, and second
The center of pressure matchmaker swapdisk 7 is provided with through hole, and central through hole of the extrusion axis 9 through the second pressure matchmaker swapdisk 7 stretches into pressurization cylinder 5.Pressurization cylinder 5
Hollow steel bushing 4 is provided with inner chamber, is advantageous to the quickly inner chamber full of pressurization cylinder 5 and recipient 22 of extrusion medium 19.Pressurization cylinder 5
It is be arranged in parallel with recipient 22, and in same level.Described one end of recipient 22 is connected with extrusion die, the other end with
3rd pressure matchmaker swapdisk 21 connects, and the first pressure matchmaker swapdisk 2 is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder 5 and the external world
Connection, the 3rd pressure matchmaker swapdisk 21 are provided with a L-shaped through hole so that the inner chamber of recipient 22 is in communication with the outside, and two L-shaped are led to
Steel pipe 24 is provided between the extraneous communications ports in hole and communications ports opening is relative, and the both ends of steel pipe 24 pass through hydraulic fitting respectively
23 are connected with the extraneous communications ports of two L-shaped through holes.First heating mantle 14 is arranged on the outer wall of extrusion die, and its start bit
The end face of recipient 22 is set to, the end face is recipient 22 and the end face of extrusion die connection end；Second heating mantle 18 is arranged on
The outer wall of recipient 22, and its original position is extrusion die and the end face of the connection end of recipient 22.
The structure and size of recipient 22 are completely the same with pressurization cylinder 5, and both have interchangeability.
Pressurization cylinder 5 and first presses the junction of matchmaker's swapdisk 2 to be provided with the first sealing system 3, and pressurization cylinder 5 exchanges with the second pressure matchmaker
The junction of disk 7 is provided with the second sealing system 6, and recipient 22 and the 3rd presses the junction of matchmaker's swapdisk 21 to be provided with the 3rd sealing system
16, extrusion die is provided with the 4th sealing system 20 with the junction of recipient 22, and the sealing system is O-ring seal and metal three
Angle is padded, and by the sealing system, realizes static seal.Second pressure matchmaker swapdisk 7 and the junction of extrusion axis 9 of hydraulic system are provided with
Sealing ring, realize dynamic sealing.
Second pressure matchmaker swapdisk 7 is provided with a L-shaped through hole so that the inner chamber of pressurization cylinder 5 is in communication with the outside, the L-shaped
The extraneous communications ports of through hole are connected by hydraulic fitting 23 with hydraulic tube 8.
The extrusion die includes upper mould 15, core rod 13, lower mould 12 and core base 11；Described one end of upper mould 15 is stretched into crowded
Pressure cylinder 22, it is connected with recipient 22, the other end is connected with one end of lower mould 12, and upper mould 15 and lower mould 12 form hollow cylinder；Mould
The one end of core base 11 is provided with boss, and the boss stretches into the other end of lower mould 12, and with its interference fits.Core base 11 it is convex
Platform is provided with groove, and core rod 13 is arranged in above-mentioned hollow cylinder, and the bottom of core rod 13 is fixed on the boss of the core base 11
Groove in, mould 15 is stretched on head.Ensure that core rod 13 and core base 11 are coaxial.
First heating mantle 14, the second heating mantle 18 use armored ceramic resistor silk heating mantle, are entered using K-type thermocouple
Trip temperature measures, and different heating-up temperatures is respectively adopted in the first heating mantle 14, the second heating mantle 18.
Reference picture 1, a kind of shaped device and its moulding process of super-pressure hydrostatic extrusion magnesium alloy pipe, uses step bag
Include：1. carrying out homogenization heat treatment to magnesium alloy blank 17, according to required size of pipe and tubing, the one end of magnesium alloy blank 17 is carried out
Processing, and lubricating grease or lubricating oil are coated on blank end face；2. when expanding extruding pipe fitting, core rod 13 is loaded into core base
11, core base 11 loads lower mould 12, and upper mould 15 loads lower mould 12, and ensure core base 11, core rod 13, lower mould 12 and on
The certain axiality of mould 15；3. using hydraulic extrusion press by step 1. described in the machined one end of magnesium alloy blank 17 get into
In upper mould 15, make to produce certain pretightning force between the two；4. the 3rd sealing system 16 is installed at upper mould 15, by magnesium alloy base
Expect that 17 other ends are put in recipient 22；5. the first heating mantle 14 is loaded onto at upper mould 15, lower mould 12 respectively and recipient 22 fills
Upper second heating mantle 18；6. use the low pressure of hydraulic system（Less than 70 MPa）Extrusion medium 19 is filled the He of pressurization cylinder 5 by oil pump
Recipient 22；7. checking sealing, pressure 20MPa in pressurization cylinder 5 need to be kept, 30Min, pressure stability, is fluctuated smaller；8. upper mould
15th, the electrified regulation of the first heating mantle 14 at lower mould 12 is incubated 2h to 220 DEG C of design temperature；The second heating on recipient 22
18 electrified regulations are covered to 200 DEG C of design temperature, are incubated 2h；9. extrusion axis 9 is promoted to press by the high-pressure hydraulic pump 10 of hydraulic system
Contracting extrusion medium 19 produces more than 400MPa super-pressure, and magnesium alloy blank 17 is expanded extrusion under hydrostatic pressure, tubing into
Type；After 10. extruding terminates, hydraulic system is unloaded, cylinder 22 and extrusion die cooling to be extruded, extrusion die is dismantled, obtains magnesium alloy
Tubing.
Claims (8)
- A kind of 1. shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe, it is characterised in that：It is overall to use horizontal type structure, including Pressurization cylinder（5）, recipient（22）, first pressure matchmaker's swapdisk（2）, second pressure matchmaker's swapdisk（7）, the 3rd pressure matchmaker's swapdisk（21）、 Extrusion die, the first heating mantle（14）, the second heating mantle（18）With with extrusion axis（9）High-pressure hydraulic pump（10）；The pressurization cylinder（5）One end and first pressure matchmaker's swapdisk（2）Connection, the other end and second pressure matchmaker's swapdisk（7）Connection, the Two pressure matchmaker's swapdisks（7）Center is provided with through hole, extrusion axis（9）Through second pressure matchmaker's swapdisk（7）Central through hole stretch into pressurization cylinder （5）；Pressurization cylinder（5）With recipient（22）It is arranged in parallel, and in same level；The recipient（22）One end and extruding Mould connects, the other end and the 3rd pressure matchmaker's swapdisk（21）Connection, first pressure matchmaker's swapdisk（2）A L-shaped through hole is provided with, is made Obtain pressurization cylinder（5）Inner chamber be in communication with the outside, the 3rd pressure matchmaker's swapdisk（21）It is provided with a L-shaped through hole so that recipient （22）Inner chamber be in communication with the outside, steel pipe is provided between the extraneous communications ports of two L-shaped through holes（24）, steel pipe（24）Both ends point Hydraulic fitting is not passed through（23）It is connected with the extraneous communications ports of two L-shaped through holes；First heating mantle（14）It is arranged on extruding The outer wall of mould, cover recipient（22）With the end face of extrusion die connection end；Second heating mantle（18）It is arranged on recipient （22）Outer wall, cover extrusion die and recipient（22）Connection end end face；The extrusion die includes upper mould（15）, core rod（13）, lower mould（12）And core base（11）；The upper mould（15）One end Stretch into recipient（22）, with recipient（22）Connection, the other end and lower mould（12）One end connection, upper mould（15）With lower mould（12） Form hollow cylinder；Core base（11）One end is provided with boss, and the boss stretches into lower mould（12）The other end, and with its transition Coordinate；Core base（11）Boss be provided with groove, core rod（13）It is arranged in above-mentioned hollow cylinder, core rod（13）Bottom is consolidated It is scheduled on the core base（11）Boss groove in, mould is stretched on head（15）；Ensure core rod（13）And core base （11）Coaxially；The shaped device of described super-pressure hydrostatic extrusion magnesium alloy pipe includes following moulding process：1. to magnesium alloy blank （17）Homogenization heat treatment is carried out, according to required size of pipe and tubing, by magnesium alloy blank（17）One end is processed, and in blank Lubricating grease or lubricating oil are coated on end face；2. when expanding extruding pipe fitting, by core rod（13）Load core base（11）, core rod bottom Seat（11）Load lower mould（12）, upper mould（15）Load lower mould（12）, and ensure core base（11）, core rod（13）, lower mould （12）With upper mould（15）Certain axiality；3. using hydraulic extrusion press by step 1. described in magnesium alloy blank（17）Plus Mould is got into one end of work（15）In, make to produce certain pretightning force between the two；4. in upper mould（15）The sealing of place's installation the 3rd System（16）, by magnesium alloy blank（17）The other end puts in recipient（22）In；5. respectively in upper mould（15）, lower mould（12）Place's dress Upper first heating mantle（14）And recipient（22）Load onto the second heating mantle（18）；6. using the low pressure of hydraulic system, i.e., less than 70 MPa, oil pump is by extrusion medium（19）, fill pressurization cylinder（5）And recipient（22）；7. checking sealing, pressurization cylinder need to be kept（5） Interior pressure 20MPa, 30Min, pressure stability, fluctuation are smaller；8. upper mould（15）, lower mould（12）First heating mantle at place（14）It is powered 220 DEG C of design temperature is heated to, is incubated 2h；Recipient（22）On the second heating mantle（18）Electrified regulation is to design temperature 200 DEG C, it is incubated 2h；9. the high-pressure hydraulic pump for passing through hydraulic system（10）Promote extrusion axis（9）Compress extrusion medium（19）Produce More than 400MPa super-pressure, magnesium alloy blank（17）Extrusion, tube forming are expanded under hydrostatic pressure；10. extruding terminates Afterwards, hydraulic system, cylinder to be extruded are unloaded（22）Cooled down with extrusion die, dismantle extrusion die, obtain magnesium alloy pipe.
- 2. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Also include Hollow steel bushing（4）, hollow steel bushing（4）It is arranged on pressurization cylinder（5）Inner chamber；Recipient（22）Structure and size and pressurization cylinder（5）It is complete It is exactly the same.
- 3. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Described One pressure matchmaker's swapdisk（2）On L-shaped through hole extraneous communications ports with the 3rd pressure matchmaker's swapdisk（21）On L-shaped through hole the external world Communications ports opening is relative so that joint steel pipe（24）Distance is most short.
- 4. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Also include First sealing system（3）, the second sealing system（6）, the 3rd sealing system（16）With the 4th sealing system（20）, pressurization cylinder（5） With first pressure matchmaker's swapdisk（2）Junction is provided with the first sealing system（3）, pressurization cylinder（5）With second pressure matchmaker's swapdisk（7）Connection Place is provided with the second sealing system（6）, recipient（22）With the 3rd pressure matchmaker's swapdisk（21）Junction is provided with the 3rd sealing system （16）, extrusion die and recipient（22）Junction is provided with the 4th sealing system（20）, the sealing system be O-ring seal and Metal triangular pad, by the sealing system, realize static seal.
- 5. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Described Two pressure matchmaker's swapdisks（7）With the extrusion axis of hydraulic system（9）Junction is provided with sealing ring, realizes dynamic sealing.
- 6. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Second pressure Matchmaker's swapdisk（7）It is provided with a L-shaped through hole so that pressurization cylinder（5）Inner chamber be in communication with the outside, the external world of the L-shaped through hole Communications ports pass through hydraulic fitting（23）With hydraulic tube（8）Connection.
- 7. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Described One heating mantle（14）, the second heating mantle（18）Armored ceramic resistor silk heating mantle is used, enters trip temperature using K-type thermocouple Measurement, the first heating mantle（14）, the second heating mantle（18）Different heating-up temperatures is respectively adopted.
- 8. the shaped device of super-pressure hydrostatic extrusion magnesium alloy pipe according to claim 1, it is characterised in that：Also include Frame（1）, frame（1）Including the first fixed beam（1-1）, the second fixed beam（1-2）, the 3rd fixed beam（1-3）, walking beam（1- 4）, the first tension force post, the second tension force post and the 3rd tension force post, successively parallel interval the first fixed beam is set（1-1）, second fix Beam（1-2）, the 3rd fixed beam（1-3）And walking beam（1-4）；First fixed beam（1-1）With walking beam（1-4）It is parallel, the first pressure Matchmaker's swapdisk（2）With the 3rd pressure matchmaker's swapdisk（21）It is separately fixed at the first fixed beam（1-1）On, second pressure matchmaker's swapdisk（7） It is fixed on the second fixed beam（1-2）On, high-pressure hydraulic pump（10）One end is fixed on the second fixed beam（1-2）On, the other end is fixed In the 3rd fixed beam（1-3）On, the core base of extrusion die（11）It is fixed on walking beam（1-4）On；First fixed beam（1- 1）, the second fixed beam（1-2）Between pass through the first tension force post connect, the second fixed beam（1-2）, the 3rd fixed beam（1-3）Between Connected by the second tension force post, the first fixed beam（1-1）And walking beam（1-4）Between pass through the 3rd tension force post connect.
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| CN109304377A (en) * | 2018-11-21 | 2019-02-05 | 中国重型机械研究院股份公司 | A kind of metal hydrostatic extruder return device of rapid |
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| CN202028627U (en) * | 2011-04-21 | 2011-11-09 | 湖州机床厂有限公司 | Three-way pipe extrusion molding device |
| CN202490842U (en) * | 2012-03-16 | 2012-10-17 | 上海宇擎新材料有限公司 | Magnesium alloy swaging forming device |
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