CN108080600B - A method of airport runway center line lamp upper cover blank is prepared with squeeze casting mould - Google Patents
A method of airport runway center line lamp upper cover blank is prepared with squeeze casting mould Download PDFInfo
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- CN108080600B CN108080600B CN201711143783.9A CN201711143783A CN108080600B CN 108080600 B CN108080600 B CN 108080600B CN 201711143783 A CN201711143783 A CN 201711143783A CN 108080600 B CN108080600 B CN 108080600B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000009716 squeeze casting Methods 0.000 title claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 4
- 229910018182 Al—Cu Inorganic materials 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 230000032683 aging Effects 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 241000399966 Danaus gilippus Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 239000002893 slag Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 33
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 238000002224 dissection Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005088 metallography Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000035929 gnawing Effects 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
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- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A kind of airport runway center line lamp upper cover blank squeeze casting mould and its method that lamp upper cover blank is prepared using the mold, mold is divided into half mould and lower half mould two parts, light cover blank is manufactured using Al-Cu system ZL205A and Direct Squeezing Casting technique, when Direct Squeezing Casting mould assembly in mold male punch insertion molten aluminum, it squeezes part molten aluminum is counter upwards, to fill the near closed hollow ring formed by concave and male punch, and boost and pressure maintaining to casting solidification.Technique of the invention is after molten aluminum pours into concave, by the forming of male punch pressurization completion casting, upper surface and inner surface of the male punch direct weighting in casting, pressure effect is splendid, mould structure of the invention is reasonable, simple process, metal utilization is high, is effectively improved Internal Quality of Cast, improve mechanical castings, the lamp upper cover blank of preparation has preferable comprehensive mechanical property and performance uniformity, and lower the cast cast properties of square one are better than indirect extrusion casting, reach advanced world standards.
Description
Technical field
The invention belongs to metal working technical areas, are related to a kind of airport runway center line lamp upper cover blank extrusion casint mould
Tool and its method that lamp upper cover blank is prepared using the mold.
Background technique
Navigation light when airport runway center line lamp is aircraft landing, airport runway center line lamp upper cover (referred to as: lamp upper cover) with
Lamp body is connected, and is the important stressed member of lamps and lanterns, may bear the enormous impact of takeoff and landing, therefore, lamp upper cover must have
Excellent comprehensive mechanical property.According to traditional sand casting, alloy graining speed is slow, coarse grains, thick big in lamp upper cover
Often there is the defects of shrinkage cavity, loose in position, and cast(ing) surface is coarse, and precision is low, easily formation crackle.
Process for making cover predominantly forges on lamp, and domestic since forging near-net-shape level is lower, technical staff transfers to adopt
Lamp upper cover is developed with Extrution casting technique.Wuhan University of Technology, Jiangsu University, Suzhou Sanji Casting Equipment Co., Ltd.
Lamp upper cover hair is successively manufactured experimently using Al-Si system A356 alloy and indirect Squeeze Casting Technology in Luo Jixiang, Cheng Kesheng, ten thousand et al.
Base.At 640 DEG C~670 DEG C of pouring temperature, 240 DEG C of mold temperature, squeeze pressure 100MPa, drift speed 0.10m/s~
When 0.12m/s, for casting of appearance of cast without casting flaw, surface roughness is good；Under T6 state, casting tensile strength and elongation difference
Reach 297MPa, 9.4%.
In the case of indirect extrusion casting, casting is shaped in the type chamber of the locking of mould assembly, not by the shadow of casting of metals amount
It rings, thus casting dimension accuracy is high, but because male punch partly stresses on casting indirectly or only, pressure effect is bad, casting
Comprehensive mechanical property and performance uniformity are relatively poor, and there are material cake and ingate, metal utilization is slightly lower, is not able to satisfy
Requirements at the higher level of the lamp upper cover to mechanical property.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of airport runway center line lamp reasonable in design
Upper cover blank squeeze casting mould.
Second technical problem to be solved by this invention, which is to provide, a kind of prepares lamp upper cover blank using above-mentioned mold
Method has the characteristics that simple process is reasonable, high-quality using Direct Squeezing Casting process forming, the lamp upper cover blank of preparation
With preferable comprehensive mechanical property and performance uniformity.
The present invention solves technical solution used by above-mentioned first technical problem are as follows: a kind of airport runway center line lamp upper cover
Blank squeeze casting mould, it is characterised in that: the lamp upper cover blank squeeze casting mould is divided into half mould and lower half mould two
Point, wherein upper half mould includes cope plate, upper stripper, upper material returned clamping plate, upper plate, upper knockout rod and formpiston component, upper half
Type is fixed on hydraulic press movable slider by cope plate；Upper stripper is arranged after connecting with upper material returned Boards wall in cope plate
Lower section, the upper end of upper stripper is in contact with hydraulic press drilling cylinder, and the lower section of upper material returned clamping plate is equipped with butterfly spring, upper company
Plate is arranged in the lower edge of cope plate, formpiston component be by sequentially connected formpiston inner core from inside to outside, formpiston inner sleeve, formpiston and
Formpiston housing composition, the upper end of formpiston housing are connected by bolt with upper plate, butterfly spring, and the upper end of upper knockout rod passes through
On upper stripper, the upper end that the lower end of upper knockout rod passes through formpiston and lamp upper cover blank offsets upper material returned Boards wall；
Lower half mould include female die components, lower template, lower material returned clamping plate, lower stripper, lower plate, lower center knockout rod, under
Circumference knockout rod and reverting bar, lower half mould are fixed on hydraulic press workbench by lower template；Lower stripper and lower material returned clamping plate
The top of lower template is set after being fixedly connected, and the lower end of lower stripper is in contact with top plug, top plug and hydraulic press ejection cylinder
It is connected, female die components are formed by connecting by former and former housing, and the lower end of former housing is connected by lower plate and lower template
Connect, between the upper end and formpiston housing of former housing be equipped with locating protection device, lower center knockout rod, lower circumference knockout rod and return
Compound lever is by lower material returned Boards wall on lower stripper.
As an improvement, the locating protection device is made of positioning guard pin and positioning protective sleeve, outside formpiston housing
Edge bottom is recessed with a notch, and positioning guard pin is fixed on the gap position of formpiston jacket bottom, positioning by fastening screw
Protective case is corresponding with positioning guard pin by the upper surface that fastening screw is fixed on former housing, when the mold is closed, positioning
Guard pin need to be contacted prior to formpiston with former housing with positioning protective sleeve.
As an improvement, the cooperation section length of the positioning guard pin and positioning protective sleeve controls between 40mm~70mm,
The gap of fitting area controls between 0.08mm~0.12mm.
It improves again, the cooperation section length of the formpiston and former housing controls between 35mm~50mm, between fitting area
Gap controls between 0.15mm~0.18mm.
Further, when the upper material returned clamping plate resets and the gap size of formpiston need to be greater than the minimal compression ruler of butterfly spring
It is very little.
Finally, the formpiston inner core, formpiston inner sleeve, formpiston are connected with formpiston housing by hexagon socket head cap screw, in formpiston
The spiral air discharge duct convenient for the discharge of type intracavity gas is offered between core and formpiston inner sleeve, formpiston inner sleeve and formpiston.
The present invention solves technical solution used by above-mentioned second technical problem are as follows: a kind of to use above-mentioned lamp upper cover blank
The method for preparing lamp upper cover blank with squeeze casting mould, it is characterised in that the following steps are included:
1) raw material use Al-Cu system ZL205A；
2) alloy melting and purified treatment: use electrical crucible melting, sequentially add AlCu50, AlMn10, AlZr10,
AlV10 intermediate alloy, purity are not less than 99.95% remelting refined aluminium ingot；Pure Cd is added at 700 DEG C~710 DEG C, slightly stirs
It mixes；730 DEG C~740 DEG C are refined using rotary blowing technique, and refining time 8 minutes~15 minutes；Stand 10 minutes~15 minutes
Skimming afterwards；AlTi5B1 refinement is added at 720 DEG C~740 DEG C；Adjustment temperature is to be cast to 730 DEG C~750 DEG C；
3) extrusion casint: extrusion casint, technological parameter are carried out with squeeze casting mould using lamp upper cover blank are as follows: mold temperature
Degree: 220 DEG C~280 DEG C, pouring temperature: 730 DEG C~750 DEG C, extrusion casint is than pressure: 100MPa~160MPa, dwell time:
The decrease speed of hydraulic press movable slider when 60s~120s, operating rate, i.e. formpiston and aluminum alloy melt contact and after contact:
5mm/s~10mm/s；
4) be heat-treated: lamp upper cover blank need to carry out T6 processing, and solution treatment heat temperature raising is divided into 3 stages: first stage
525 DEG C~535 DEG C, keep the temperature 0.5h~1.5h；530 DEG C~540 DEG C of second stage, keep the temperature 0.5~1.5h；535 DEG C of phase III
~545 DEG C, keep the temperature 12h~16h, water cooling to room temperature；150 DEG C~158 DEG C of ageing treatment heating temperature, soaking time 8h~10h,
It comes out of the stove air-cooled；Solution treatment transfer time is no more than 15s, and the holding time of solution treatment to ageing treatment is less than or equal to 4h.
Preferably, the technological parameter that rotary blowing technique refines in the step 2) are as follows: revolving speed: 60 revs/min~90 turns/
Minute, nitrogen pressure: 0.4MPa~0.5MPa, high pure nitrogen purity: 99.99%.
It improves again, the detailed process of extrusion casint in the step 3) are as follows:
A, made between upper half mould and lower half mould by hydraulic press movable slider there are certain working space, step 2) is molten
Purified aluminum alloy melt is refined to pour into via ceramic network filter device by formpiston inner core, formpiston under defined pouring temperature
In the mold cavity by preheating that set, formpiston, former, former housing are formed, the oxide skin of aluminum alloy melt surface is manually excluded；
B, hydraulic press movable slider is declined using fast lower speed, when formpiston inner core, formpiston inner sleeve, formpiston are close to aluminum alloy melt
Using operating rate when surface instead contacts it slowly with aluminum alloy melt；
C, continue to decline with hydraulic press movable slider, gas is discharged in mold, and aluminum alloy melt begins to fill with type chamber, sun
Mould inner core, formpiston inner sleeve, formpiston, former, former housing start to apply pressure to the aluminum alloy melt in mold cavity；
D, after a certain period of time than pressure maintaining under pressure in defined extrusion casint, rise hydraulic press movable slider, if on lamp
Lid blank and upper half mould adhesion, start the drilling cylinder of hydraulic press, and drilling cylinder pushes upper stripper downlink, upper stripper compression
Butterfly spring, and upper knockout rod is pushed to move down, it separates lamp upper cover blank with formpiston inner core, formpiston inner sleeve and formpiston, moves back
Butterfly spring elastic deformation force makes stripper be restored to initial position after the completion of material movement；If lamp upper cover blank and lower half mould
Adhesion, starts hydraulic press ejection cylinder, and ejection cylinder pushes lower center knockout rod, lower circumference dnockout by top plug and lower stripper
Bar moves up, and separates lamp upper cover blank with former, hydraulic press movable slider downlink after the completion of material returned action, Guan Bi mould,
Formpiston housing pushes reverting bar, and lower stripper is made to be restored to initial position.
Finally, 3 stages of the solution treatment heat temperature raising of the step 4): 530 DEG C of the first stage, keeping the temperature 1h；Second-order
535 DEG C of section keeps the temperature 1h；540 DEG C of phase III, keep the temperature 14h；154 DEG C of ageing treatment heating temperature, soaking time 9h, sky of coming out of the stove
Cold
Compared with the prior art, the advantages of the present invention are as follows:
1) locating protection device is set in mold design, avoids formpiston and former housing gnaws mould phenomenon, to formpiston and
Former housing plays a protective role；
2) spiral air discharge duct has been opened up between formpiston inner core and formpiston inner sleeve, formpiston inner sleeve and formpiston respectively, has squeezed casting
Making gas extra in aluminum alloy melt in process drop centre type and male punch formation near closed hollow ring can be by splitting the exhaust in stitching
Outside slot discharge type chamber, eliminate lamp upper cover blank end due to be vented it is unsmooth caused by gas hole defect；
3) lamp upper cover blank is manufactured using ZL205A alloy and Direct Squeezing Casting technique, by optimizing Extrution casting technique
Parameter improves mold design, solves domestic early stage using indirect Squeeze Casting Technology development lamp upper cover blank due to technique item
Part limitation can not use the problem of ZL205A alloy of the serious power of hot cracking tendency, the tensile strength (R of the lamp upper cover blank of trial-productionm)
Much higher than the mechanical property of the domestic lamp upper cover blank manufactured using A356 and indirect Squeeze Casting Technology, reaches international and first intake
It is flat；
4) use Direct Squeezing Casting process forming lamp upper cover blank, male punch direct weighting in casting upper surface and
Inner surface, pressure effect is good, and casting is fine and close, no shrinkage cavity, it is loose the defects of, produce the tensile strength 438MPa of lamp upper cover blank as a trial
~446MPa, elongation 8%~13%；Comprehensive mechanical property and performance uniformity are better than indirect extrusion casting, can satisfy lamp
Requirements at the higher level of the upper cover to mechanical property；In addition, Direct Squeezing Casting technique is without material cake and ingate, metal utilization is high, with
Indirect casting technique is compared, and Internal Quality of Cast can be improved, and improves mechanical castings.
Detailed description of the invention
Fig. 1 a~1b is the structural schematic diagram of airport runway center line lamp upper cover blank of the invention, and wherein a is top view, b
For bottom view；
Fig. 2 is the structural schematic diagram of lamp upper cover blank squeeze casting mould of the invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Fig. 2, a kind of airport runway center line lamp upper cover blank squeeze casting mould, which is squeezed
Casting mould is divided into half mould and lower half mould two parts,
Upper half mould is mainly by butterfly spring 1, upper material returned clamping plate 2, upper stripper 3, cope plate 5, upper plate 6, formpiston inner core
7, formpiston inner sleeve 8, formpiston 9, formpiston housing 10, upper knockout rod 11 and positioning guard pin 13 form, the connection type of each component are as follows:
Upper half mould is fixed on hydraulic press movable slider by cope plate 5；Upper material returned clamping plate 2 passes through hexagon socket head cap screw with upper stripper 3
It is fixed together；Upper knockout rod 11 is fixed on upper stripper 3 by upper material returned clamping plate 2, upper stripper 3 and hydraulic press dnockout oil
Cylinder 4 is in contact；Butterfly spring 1 is connected to upper 2 lower section of material returned clamping plate by hexagon socket head cap screw；Formpiston inner core 7, formpiston inner sleeve 8, sun
Mould 9, formpiston housing 10 are connected by hexagon socket head cap screw；Formpiston housing 10 passes through hexagon socket head cap screw and upper plate 6, butterfly spring 1
Connection is connect by fastening screw with positioning guard pin 13；Wherein: when lamp upper cover blank 12 and upper half mould adhesion, hydraulic press
4 downlink of drilling cylinder, butterfly spring 1 are compressed during upper 3 material returned of stripper, upper stripper 3 push upper knockout rod 11 to
Lower movement separates lamp upper cover blank 12 with formpiston inner core 7, formpiston inner sleeve 8 and formpiston 9, butterfly spring 1 after the completion of material returned action
Elastic deformation force makes stripper 3 be restored to initial position；
Lower half mould is mainly by positioning protective sleeve 14, former 15, lower center knockout rod 16, former housing 17, lower circumference dnockout
Bar 18, reverting bar 19, lower material returned clamping plate 20, top plug 21, lower stripper 22, lower plate 23, lower template 24 form, the company of each component
Connect mode are as follows: lower half mould is fixed on hydraulic press workbench by lower template 24；Lower material returned clamping plate 20 passes through with lower stripper 22
Hexagon socket head cap screw is fixed together；Lower center knockout rod 16, lower circumference knockout rod 18, reverting bar 19 are solid by lower material returned clamping plate 20
It is scheduled on lower stripper 22；Lower stripper 22 is in contact with top plug 21；Former 15, former housing 17 are connected by hexagon socket head cap screw
It connects；Former housing 17 is connect by lower plate 23 with lower template 24, is connect by fastening screw with positioning protective sleeve 14.Wherein:
When lamp upper cover blank 12 and lower half mould adhesion, hydraulic press ejection cylinder uplink, by top plug 21 and lower stripper 22, under promotion
Center knockout rod 16, lower circumference knockout rod 18 move up, and separate lamp upper cover blank 12 with former 15, after the completion of material returned action
Hydraulic press movable slider downlink, Guan Bi mould, formpiston housing 10 push reverting bar 19, and lower stripper 22 is made to be restored to initial bit
It sets；
Positioning guard pin 13 plays a protective role with former housing 17 with 14 groups of positioning protective sleeve pairs of formpistons 9 and positions protection
Mechanism avoids formpiston 9 and former housing 17 from gnawing mould phenomenon, to make to position guard pin 13 and positioning protective sleeve 14 in design
Contact opportunity contacts prior to formpiston 9 with former housing 17, and the cooperation section length of positioning guard pin 13 and positioning protective sleeve 14 controls
Between 40mm~70mm, the gap of fitting area is controlled between 0.08mm~0.12mm, is positioned such that protection mechanism in upper half
Type damages when dislocation occurs with lower half mould, plays a protective role to formpiston 9 and former housing 17；In order in applying press process
Guarantee aluminum alloy melt good seal in mold cavity, the cooperation section length control of formpiston 9 and former housing 17 is in 35mm~50mm
Between, the gap of fitting area controls between 0.15mm~0.18mm；In order to guarantee that butterfly spring 1 is not upper during dnockout
Stripper 3 crushes, and need to be greater than the minimal compression size of butterfly spring when upper material returned clamping plate 2 resets with the gap size of formpiston 9；For
The exhaust of guarantee extrusion casint process medium casting is good, mold parts maintenance, replacement cost is reduced, inside formpiston housing 10
Provided with formpiston inner core 7, formpiston inner sleeve 8 and formpiston 9, and respectively in formpiston inner core 7 and formpiston inner sleeve 8, formpiston inner sleeve 8 and formpiston
Spiral air discharge duct is opened up between 9, extrusion casint process drop centre type and male punch form more in aluminum alloy melt near closed hollow ring
Remaining gas can be by splitting outside the air discharge duct discharge type chamber in seam.
Embodiment 1
1) material: ZL205A.
2) alloy melting and purified treatment: electrical crucible melting is used.Sequentially add AlCu50, AlMn10, AlZr10,
AlV10 intermediate alloy, purity are not less than 99.95% remelting refined aluminium ingot；Pure Cd, gentle agitation are added at 700 DEG C；730℃
It is refined using rotary blowing technique, refining time 8 minutes (60 revs/min of revolving speed, nitrogen pressure 0.4MPa, high pure nitrogen purity
99.99%.)；Stand skimming after ten minutes；AlTi5B1 refinement is added at 720 DEG C；Adjustment temperature is to be cast to 730 DEG C.
3) extrusion casint: 220 DEG C of mold temperature, 730 DEG C of pouring temperature, extrusion casint is than pressure 100MPa, dwell time
60s, operating rate 5mm/s.
4) be heat-treated: airport runway center line lamp upper cover blank need to carry out T6 processing.Solution treatment heat temperature raising is divided into 3 ranks
Section: 530 DEG C of the first stage, 1h is kept the temperature；535 DEG C of second stage, keep the temperature 1h；540 DEG C of phase III, keep the temperature 14h, water cooling (room
Temperature)；154 DEG C of ageing treatment heating temperature, soaking time 9h comes out of the stove air-cooled.Solution treatment transfer time 8s, solution treatment to when
Imitate the holding time 0.2h of processing.
5) material property and product quality: ontology dissection sampling actual measurement tensile strength 438MPa, elongation 8%；Blank
The defects of cold shut, crackle, shrinkage cavity is not present in size coincidence pattern regulation, surface impulse- free robustness, and ontology dissects sample metallography microscope group
It knits inspection and finds internal flawless, internal shrinkage cavity loose is no more than I class casting appointed part in the 4.6th article of GB/T 9438
Regulation, considerably beyond the real standard of similar product tensile strength 297MPa, elongation 9.4%.
Embodiment 2
1) material: ZL205A.
2) alloy melting and purified treatment: electrical crucible melting is used.Sequentially add AlCu50, AlMn10, AlZr10,
AlV10 intermediate alloy, purity are not less than 99.95% remelting refined aluminium ingot；Pure Cd, gentle agitation are added at 705 DEG C；735℃
It is refined using rotary blowing technique, (75 revs/min of revolving speed, nitrogen pressure 0.45MPa, high pure nitrogen were pure in 12 minutes for refining time
Degree 99.99%.)；Skimming after standing 12 minutes；AlTi5B1 refinement is added at 730 DEG C；Adjustment temperature is to be cast to 740 DEG C.
3) extrusion casint: 250 DEG C of mold temperature, 740 DEG C of pouring temperature, extrusion casint is than pressure 130MPa, dwell time
90s, operating rate 8mm/s.
4) be heat-treated: airport runway center line lamp upper cover blank need to carry out T6 processing.Solution treatment heat temperature raising is divided into 3 ranks
Section: 530 DEG C of the first stage, 1h is kept the temperature；535 DEG C of second stage, keep the temperature 1h；540 DEG C of phase III, keep the temperature 14h, water cooling (room
Temperature)；154 DEG C of ageing treatment heating temperature, soaking time 9h comes out of the stove air-cooled.Solution treatment transfer time 10s, solution treatment is extremely
The holding time 2h of ageing treatment.
5) material property and product quality: ontology dissection sampling actual measurement tensile strength 446MPa, elongation 11%；Blank
The defects of cold shut, crackle, shrinkage cavity is not present in size coincidence pattern regulation, surface impulse- free robustness, and ontology dissects sample metallography microscope group
It knits inspection and finds internal flawless, internal shrinkage cavity loose is no more than I class casting appointed part in the 4.6th article of GB/T 9438
Regulation, considerably beyond the real standard of similar product tensile strength 297MPa, elongation 9.4%.
Embodiment 3
1) material: ZL205A.
2) alloy melting and purified treatment: electrical crucible melting is used.Sequentially add AlCu50, AlMn10, AlZr10,
AlV10 intermediate alloy, purity are not less than 99.95% remelting refined aluminium ingot；Pure Cd, gentle agitation are added at 710 DEG C；740℃
It is refined using rotary blowing technique, refining time 15 minutes (90 revs/min of revolving speed, nitrogen pressure 0.5MPa, high pure nitrogen purity
99.99%.)；Skimming after standing 15 minutes；AlTi5B1 refinement is added at 740 DEG C；Adjustment temperature is to be cast to 750 DEG C.
3) extrusion casint: 280 DEG C of mold temperature, 750 DEG C of pouring temperature, extrusion casint is than pressure 160MPa, dwell time
120s, operating rate 10mm/s.
4) be heat-treated: airport runway center line lamp upper cover blank need to carry out T6 processing.Solution treatment heat temperature raising is divided into 3 ranks
Section: 530 DEG C of the first stage, 1h is kept the temperature；535 DEG C of second stage, keep the temperature 1h；540 DEG C of phase III, keep the temperature 14h, water cooling (room
Temperature)；154 DEG C of ageing treatment heating temperature, soaking time 9h comes out of the stove air-cooled.Solution treatment transfer time 15s, solution treatment is extremely
The holding time 4h of ageing treatment.
5) material property and product quality: ontology dissection sampling actual measurement tensile strength 440MPa, elongation 13%；Blank
The defects of cold shut, crackle, shrinkage cavity is not present in size coincidence pattern regulation, surface impulse- free robustness, and ontology dissects sample metallography microscope group
It knits inspection and finds internal flawless, internal shrinkage cavity loose is no more than I class casting appointed part in the 4.6th article of GB/T 9438
Regulation, considerably beyond the real standard of similar product tensile strength 297MPa, elongation 9.4%.
Above embodiments only illustrate technical solution of the present invention, rather than its limitations；Although with reference to the foregoing embodiments to this
Invention is described in detail, those skilled in the art should understand that: it still can be to foregoing embodiments institute
The technical solution of record is modified or equivalent replacement of some of the technical features；And these are modified or replaceed,
The spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of method for preparing airport runway center line lamp upper cover blank with squeeze casting mould, it is characterised in that:
Lamp upper cover blank squeeze casting mould is divided into half mould and lower half mould two parts, wherein upper half mould include cope plate, on move back
Flitch, upper material returned clamping plate, upper plate, upper knockout rod and formpiston component, upper half mould are fixed on hydraulic press activity by cope plate
On sliding block；Upper stripper is arranged in the lower section of cope plate after connecting with upper material returned Boards wall, the upper end of upper stripper with it is hydraulic
Machine drilling cylinder is in contact, and the lower section of upper material returned clamping plate is equipped with butterfly spring, and the lower edge of cope plate, formpiston is arranged in upper plate
Component is made of sequentially connected formpiston inner core, formpiston inner sleeve, formpiston and formpiston housing from inside to outside, the upper end of formpiston housing
Be connected by bolt with upper plate, butterfly spring, the upper end of upper knockout rod by upper material returned Boards wall on upper stripper,
The upper end that the lower end of upper knockout rod passes through formpiston and lamp upper cover blank offsets；
Lower half mould includes female die components, lower template, lower material returned clamping plate, lower stripper, lower plate, lower center knockout rod, lower circumference
Knockout rod and reverting bar, lower half mould are fixed on hydraulic press workbench by lower template；Lower stripper and lower material returned Boards wall
The top of lower template is set after connection, and the lower end of lower stripper is in contact with top plug, and top plug is connected with hydraulic press ejection cylinder
It connects, female die components are formed by connecting by former and former housing, and the lower end of former housing is connect by lower plate with lower template, yin
Locating protection device, lower center knockout rod, lower circumference knockout rod and reverting bar are equipped between the upper end and formpiston housing of mould housing
Through lower material returned Boards wall on lower stripper；
The following steps are included:
1) raw material use Al-Cu system ZL205A；
2) alloy melting and purified treatment: use electrical crucible melting, sequentially add AlCu50, AlMn10, AlZr10,
AlV10 intermediate alloy, purity are not less than 99.95% remelting refined aluminium ingot；Pure Cd is added at 700 DEG C~710 DEG C, slightly stirs
It mixes；730 DEG C~740 DEG C are refined using rotary blowing technique, and refining time 8~15 minutes；It is skimmed after standing 10 minutes~15 minutes
Slag；AlTi5B1 refinement is added at 720 DEG C~740 DEG C；Adjustment temperature is to be cast to 730 DEG C~750 DEG C；
3) extrusion casint: extrusion casint, technological parameter are carried out with squeeze casting mould using lamp upper cover blank are as follows: mold temperature:
220 DEG C~280 DEG C, pouring temperature: 730 DEG C~750 DEG C, extrusion casint is than pressure: 100MPa~160MPa, dwell time: 60s
The decrease speed of hydraulic press movable slider when~120s, operating rate, i.e. formpiston and aluminum alloy melt contact and after contact: 5mm/
S~10mm/s；
4) be heat-treated: lamp upper cover blank need to carry out T6 processing, and solution treatment heat temperature raising is divided into 3 stages: 525 DEG C of the first stage
~535 DEG C, keep the temperature 0.5h~1.5h；530 DEG C~540 DEG C of second stage, keep the temperature 0.5h~1.5h；Phase III 535~545
DEG C, keep the temperature 12~16h, water cooling to room temperature；150~158 DEG C of ageing treatment heating temperature, soaking time 8h~10h, sky of coming out of the stove
It is cold；Solution treatment transfer time is no more than 15s, and the holding time of solution treatment to ageing treatment is less than or equal to 4h.
2. according to the method described in claim 1, it is characterized by: the technique ginseng that rotary blowing technique refines in the step 2)
Number are as follows: revolving speed: 60 revs/min~90 revs/min, nitrogen pressure: 0.4MPa~0.5MPa, high pure nitrogen purity: 99.99%.
3. according to the method described in claim 1, it is characterized by: in the step 3) extrusion casint detailed process are as follows:
A, make between upper half mould and lower half mould that there are certain working spaces by hydraulic press movable slider, step 2) melting is net
Aluminum alloy melt after change is poured into via ceramic network filter device by formpiston inner core, formpiston inner sleeve, sun under defined pouring temperature
In the mold cavity by preheating that mould, former, former housing are formed, the oxide skin of aluminum alloy melt surface is manually excluded；
B, hydraulic press movable slider is declined using fast lower speed, when formpiston inner core, formpiston inner sleeve, formpiston are close to aluminum alloy melt surface
Shi Gaiyong operating rate contacts it slowly with aluminum alloy melt；
C, continue to decline with hydraulic press movable slider, gas is discharged in mold, and aluminum alloy melt begins to fill with type chamber, in formpiston
Core, formpiston inner sleeve, formpiston, former, former housing start to apply pressure to the aluminum alloy melt in mold cavity；
D, after a certain period of time than pressure maintaining under pressure in defined extrusion casint, rise hydraulic press movable slider, if lamp upper cover hair
Base and upper half mould adhesion start the drilling cylinder of hydraulic press, and drilling cylinder pushes upper stripper downlink, and upper stripper compresses butterfly
Spring, and upper knockout rod is pushed to move down, separate lamp upper cover blank with formpiston inner core, formpiston inner sleeve and formpiston, the material returned is dynamic
Making completion queen butterfly shape spring deformation force makes stripper be restored to initial position；If lamp upper cover blank and lower half mould are viscous
Even, start hydraulic press ejection cylinder, ejection cylinder pushes lower center knockout rod, lower circumference knockout rod by top plug and lower stripper
It moves up, separates lamp upper cover blank with former, hydraulic press movable slider downlink after the completion of material returned action, Guan Bi mould, sun
Mould housing pushes reverting bar, and lower stripper is made to be restored to initial position.
4. according to the method described in claim 1, it is characterized by: 3 stages of solution treatment heat temperature raising of the step 4):
530 DEG C of first stage, keep the temperature 1h；535 DEG C of second stage, keep the temperature 1h；540 DEG C of phase III, keep the temperature 14h；Ageing treatment heating
154 DEG C of temperature, soaking time 9h comes out of the stove air-cooled.
5. according to the method described in claim 1, it is characterized by: the locating protection device is by positioning guard pin and positioning
Protective case composition, the outer edge bottom of formpiston housing are recessed with a notch, position guard pin by fastening screw and are fixed on formpiston
The gap position of jacket bottom, positioning protective sleeve are fixed on upper surface and the positioning guard pin phase of former housing by fastening screw
Corresponding, when the mold is closed, positioning guard pin is contacted prior to formpiston with former housing with positioning protective sleeve.
6. according to the method described in claim 5, it is characterized by: the cooperation head of district of the positioning guard pin and positioning protective sleeve
Between 40mm~70mm, the gap of fitting area is controlled between 0.08mm~0.12mm for degree control.
7. according to the method described in claim 1, it is characterized by: the control of the cooperation section length of the formpiston and former housing exists
Between 35mm~50mm, the gap of fitting area is controlled between 0.15mm~0.18mm.
8. according to the method described in claim 1, it is characterized by: the upper material returned clamping plate reset when and formpiston gap size
Greater than the minimal compression size of butterfly spring.
9. according to the method described in claim 1, it is characterized by: the formpiston inner core, formpiston inner sleeve, formpiston and formpiston housing
It is connected by hexagon socket head cap screw, is offered respectively between formpiston inner core and formpiston inner sleeve, formpiston inner sleeve and formpiston convenient for type chamber
The spiral air discharge duct of interior gas discharge.
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