CN106756300A - One kind is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method - Google Patents
One kind is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method Download PDFInfo
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- CN106756300A CN106756300A CN201710013185.3A CN201710013185A CN106756300A CN 106756300 A CN106756300 A CN 106756300A CN 201710013185 A CN201710013185 A CN 201710013185A CN 106756300 A CN106756300 A CN 106756300A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention discloses one kind without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, and its processing step is：Melting, insulation, mould pretreatment, feed, injection is vacuumized, and is molded.Using the evacuated die-casting process method come mass production aluminium alloy cylinder, the air content of casting can be reduced, make casting quality and performance up to standard, and then improve the yields of casting；Improve production efficiency；Reduce manufacturing cost.
Description
Technical field
The present invention relates to a kind of engine aluminum method for casting cylinder body, belong to casting technology field, and in particular to one kind is without cylinder
Set aluminium alloy cylinder evacuated die-casting process method.
Background technology
Integral aluminum alloy cylinder body is also referred to as without cylinder sleeve aluminium alloy cylinder, there is no traditional cast iron cylinder sleeve, all closed using aluminium
Golden cast shaping；There is strict demand to the quantity of the defect of aluminium alloy cylinder holes position, size, shape without cylinder sleeve cylinder body.
It is main using low pressure casting and gravity foundry technology without the production of cylinder sleeve aluminium alloy cylinder at present in order to reduce air content as far as possible,
Wherein low pressure casting can be applied to batch production, and gravitational casting be only applied to slowly excessively due to complex process, beat single-piece or
Small lot.
There are the short advantage of low, efficiency high, process route of investing, but generally existing without cylinder sleeve cylinder body using extrusion process production
The exceeded problem of cylinder holes position defect, is the Main Means for solving stomata class defect using vacuum die casting process, while coordinating it
Its process program can reach prospective quality target.
Without cylinder sleeve aluminium alloy cylinder low-pressure casting technique mainly include melting, cast, coremaking, knockout, go cast gate, cleaning,
The operations such as heat treatment.The characteristics of low-pressure casting, determines that its beat is slow, at least wants 10min or so, under the conditions of identical production capacity, equipment
Cost of investment is far above extrusion process and gravity foundry technology, so as to cause production cost high, or even counteracts without cylinder sleeve aluminium
The alloy cylinder body cost advantage of itself.By contrast, gravity foundry technology cost of investment is relatively low, but equally exist inefficiency,
The characteristics of technology controlling and process is difficult, quality stability is poor.And traditional extrusion process is difficult to control to cast-internal gas hole defect, more casting
Part is particularly reported because being unable to reach without cylinder sleeve aluminium alloy cylinder Internal Quality of Cast because the quality requirement of cylinder holes position is not up to standard
Useless, yields is low, produces in batches relatively costly.The shortcoming of three of the above technique limits the batch life without cylinder sleeve aluminium alloy cylinder
Produce, make to be difficult to large-scale promotion application without cylinder sleeve aluminium alloy engine.
The content of the invention
It is an object of the invention to provide one kind without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it can reduce containing for casting
Tolerance, makes casting quality and performance up to standard, and then improves the yields of casting；Improve production efficiency；Reduce manufacturing cost.
The purpose of the present invention is achieved through the following technical solutions：
One kind is comprised the following steps without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method：
1）Melting：Materials A DC12 is melted at 740 ± 20 DEG C, virgin material ratio is not less than 70%, then pour out aluminium liquid and enter
Row refining degasification,
2）Insulation：By step 1）Obtained aluminium liquid is placed in holding furnace, and holding temperature is 660-680 DEG C；
3）Mould is pre-processed：
A. the mould under chill state is preheated, mold cavity surface temperature control at 100-200 DEG C,
B. spraying lubrication is carried out to drift pressure chamber and mold cavity surface,
C. matched moulds after spraying, arranges sealing strip in a mold；
4）Feed：Aluminium liquid is taken out from holding furnace, is poured into pressure chamber, pressure chamber degree of filling is 45-50%；
5）Injection：With drift by the aluminium liquid press-in die die cavity in pressure chamber；
6）Vacuumize：Start after drift setting in motion and vacuumize, fill startup mould circulating temperature control system, dynamic model temperature control after the completion of type
Water cooling 60-80s of circulation time, the cooling of cover half temperature control water 80-100s of circulation time, 18-20s of high pressure spot cool time；Pass through
Collection mold temperature, adjust circulation time, and then adjust mold temperature so that cylinder holes core temperature be 80-150 DEG C, mould other
Profiled surface temperature is 100-200 DEG C；
7）Die sinking：Molded after casting solidification, take casting away.
Further, step 1）In refining temperature be 700-740 DEG C, the degasification time be 5-10min.
Further, step 2）Middle holding temperature spring, autumn are 675 DEG C, and summer is 670 DEG C, and winter is 680 DEG C.
Further, step 3）Middle oil lubricant is lubricated to pressure chamber, and mold cavity surface is sprayed with water based paint
Apply lubrication.
Further, step 3）In in cylinder holes position, independent spray circuit is set, coating is 1 with the volume ratio of water:20-40,
Die cavity other positions coating is 1 with the volume ratio of water:70—100.
Further, step 4）Middle aluminium liquid pours into temperature >=630 DEG C in pressure chamber 20s, density equivalent≤2 of aluminium liquid.
Further, step 5）Middle injection technological parameter is that drift low speed speed is 0.3-0.4m/s, and die cavity is entered in liquation
The switching of low high speed is completed at 10% ± 1%, filling speed is 45~55m/s, and boost pressure is 700-800bar, holding the pressure time is
20—25s。
Further, step 6）In final vacuum in below 250mbar, dustiness is in below 1300mbar.
The beneficial effects of the invention are as follows：Vacuumized in press casting procedure, reduce the air content of casting, make casting quality and
Performance is up to standard, improves the yields of casting；By the optimization to each operation step, production efficiency is improve；Yields and life
The lifting of efficiency is produced, the manufacturing cost of integral aluminum alloy cylinder body is reduced.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Specific embodiment
For the present invention is better described, technical scheme is readily appreciated, it is of the invention typical but non-limiting
Embodiment is as follows：
The weight/mass percentage composition of materials A DC12 various elements is：
Cu 1.5~3.5%,
Si 9.6~12.0%,
Mg≤0.3%, Zn≤1.0%, Fe≤1.3%, Mn≤0.5%, Ni≤0.5%, Sn≤0.3%, Ca≤200ppm%, Pb≤
0.1%, Cd≤0.005%, balance of Al and inevitable impurity are constituted.
Embodiment 1：One kind is comprised the following steps without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method：
1）Melting：Materials A DC12 is melted at 740 ± 20 DEG C, virgin material ratio is not less than 70%, then pour out aluminium liquid and enter
Row refining degasification, tapping temperature is 740 DEG C, and refining temperature is 700 DEG C, degasification time 5min,
2）Insulation：By step 1）Obtained aluminium liquid is placed in holding furnace, holding temperature be 660 DEG C, in holding furnace aluminium water more than 4h,
Need to carry out except Slag treatment, aluminium water needs degasification again to remove the gred and carry out chemical composition analysis, qualified to use, aluminium water more than 8h
More than 48h, ingot casting treatment need to be carried out；
3）Mould is pre-processed：
A. the mould under chill state is preheated, mold cavity surface temperature control at 100 DEG C,
B. pressure chamber is lubricated with oil lubricant, spraying lubrication is carried out to mold cavity surface with water based paint, in cylinder holes position
Independent spray circuit is set, and coating is 1 with the volume ratio of water:20-40, the coating of die cavity other positions is with the volume ratio of water
1:70—100。
C. matched moulds after spraying, arranges sealing strip in a mold, lifts die cavity sealing, prevents gas from entering in die cavity, and
Make to vacuumize in hgher efficiency, reduction Casting Blowholes defect；
4）Feed：Aluminium liquid is taken out from holding furnace, is poured into pressure chamber, aluminium liquid pours into temperature >=630 DEG C in pressure chamber 20s, aluminium liquid
Density equivalent≤2, pressure chamber degree of filling 45-50%；
5）Injection：With drift by the aluminium liquid press-in die die cavity in pressure chamber；Drift low speed speed is 0.3m/s, is entered in liquation
Low high speed switching is completed at die cavity 10% ± 1%, filling speed is 45m/s, and boost pressure is 800bar, hold the pressure time for 23s.
6）Vacuumize：Start after drift setting in motion and vacuumize, final vacuum exists in below 250mbar, dustiness
Below 1300mbar, drift and pressure chamber good seal, mould template and each die joint good seal fill after the completion of type and start mould
Circulating temperature control system, dynamic model temperature control 60-80s of circulation time, cover half temperature control 80-100s of circulation time, high pressure spot cool time
18-20s, by gathering mold temperature, adjusts circulation time, and then adjust mold temperature so that and cylinder holes core temperature is 80-
150 DEG C, other profiled surface temperature of mould are 100-200 DEG C；
7）Die sinking：Molded after casting solidification, taken away casting ejection by mold component, subsequent cycle is carried out, referring to the technique of Fig. 1
Flow chart, feed → injection → vacuumize → mold, realizes mass production.
Embodiment 2：One kind is comprised the following steps without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method：
1）Melting：Materials A DC12 is melted at 740 ± 20 DEG C, virgin material ratio is not less than 70%, then pour out aluminium liquid and enter
Row refining degasification, tapping temperature is 720 DEG C, and refining temperature is 740 DEG C, degasification time 10min,
2）Insulation：By step 1）Obtained aluminium liquid is placed in holding furnace, holding temperature be 680 DEG C, in holding furnace aluminium water more than 4h,
Need to carry out except Slag treatment；Aluminium water needs degasification again to remove the gred and carry out chemical composition analysis more than 8h, qualified to use；Aluminium water
More than 48h, ingot casting treatment need to be carried out；
3）Mould is pre-processed：
A. the mould under chill state is preheated, mold cavity surface temperature control at 200 DEG C,
B. pressure chamber is lubricated with oil lubricant, spraying lubrication is carried out to mold cavity surface with water based paint, in cylinder holes position
Independent spray circuit is set, and coating is 1 with the volume ratio of water:20-40, the coating of die cavity other positions is with the volume ratio of water
1:70—100。
C. matched moulds after spraying, arranges sealing strip in a mold, lifts die cavity sealing, prevents gas from entering in die cavity, and
Make to vacuumize in hgher efficiency, reduction Casting Blowholes defect；
4）Feed：Aluminium liquid is taken out from holding furnace, is poured into pressure chamber, aluminium liquid pours into temperature >=630 DEG C in pressure chamber 20s, aluminium liquid
Density equivalent≤2, pressure chamber degree of filling 45-50%；
5）Injection：With drift by the aluminium liquid press-in die die cavity in pressure chamber；Drift low speed speed is 0.4m/s, is entered in liquation
Low high speed switching is completed at die cavity 10% ± 1%, filling speed is 55m/s, and boost pressure is 700bar, hold the pressure time for 21s.
6）Vacuumize：Start after drift setting in motion and vacuumize, final vacuum exists in below 250mbar, dustiness
Below 1300mbar, drift and pressure chamber good seal, mould template and each die joint good seal fill after the completion of type and start mould
Circulating temperature control system, dynamic model temperature control 60-80s of circulation time, cover half temperature control 80-100s of circulation time, high pressure spot cool time
18-20s, by gathering mold temperature, adjusts circulation time, and then adjust mold temperature so that and cylinder holes core temperature is 80-
150 DEG C, other profiled surface temperature of mould are 100-200 DEG C；
7）Die sinking：Molded after casting solidification, taken away casting ejection by mold component, subsequent cycle is carried out, referring to the technique of Fig. 1
Flow chart, feed → injection → vacuumize → mold, realizes mass production.
Embodiment 3：One kind is comprised the following steps without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method：
1）Melting：Materials A DC12 is melted at 740 ± 20 DEG C, virgin material ratio is not less than 70%, then pour out aluminium liquid and enter
Row refining degasification, tapping temperature is 760 DEG C, and refining temperature is 720 DEG C, degasification time 7min,
2）Insulation：By step 1）Obtained aluminium liquid is placed in holding furnace, holding temperature be 670 DEG C, in holding furnace aluminium water more than 4h,
Need to carry out except Slag treatment, aluminium water needs degasification again to remove the gred and carry out chemical composition analysis, qualified to use, aluminium water more than 8h
More than 48h, ingot casting treatment need to be carried out；
3）Mould is pre-processed：
A. the mould under chill state is preheated, mold cavity surface temperature control at 200 DEG C,
B. pressure chamber is lubricated with oil lubricant, spraying lubrication is carried out to mold cavity surface with water based paint, in cylinder holes position
Independent spray circuit is set, and coating is 1 with the volume ratio of water:20-40, the coating of die cavity other positions is with the volume ratio of water
1:70—100。
C. matched moulds after spraying, arranges sealing strip in a mold, lifts die cavity sealing, prevents gas from entering in die cavity, and
Make to vacuumize in hgher efficiency, reduction Casting Blowholes defect；
4）Feed：Aluminium liquid is taken out from holding furnace, is poured into pressure chamber, aluminium liquid pours into temperature >=630 DEG C in pressure chamber 20s, aluminium liquid
Density equivalent≤2, pressure chamber degree of filling 45-50%；
5）Injection：With drift by the aluminium liquid press-in die die cavity in pressure chamber；Drift low speed speed is 0.4m/s, is entered in liquation
Low high speed switching is completed at die cavity 10% ± 1%, filling speed is 55m/s, and boost pressure is 700bar, hold the pressure time for 21s.
6）Vacuumize：Start after drift setting in motion and vacuumize, final vacuum exists in below 250mbar, dustiness
Below 1300mbar, drift and pressure chamber good seal, mould template and each die joint good seal fill after the completion of type and start mould
Circulating temperature control system, dynamic model temperature control 60-80s of circulation time, cover half temperature control 80-100s of circulation time, high pressure spot cool time
18-20s, by gathering mold temperature, adjusts circulation time, and then adjust mold temperature so that and cylinder holes core temperature is 80-
150 DEG C, 100-200 DEG C of mould other profiled surfaces；
7）Die sinking：Molded after casting solidification, taken away casting ejection by mold component, subsequent cycle is carried out, referring to the technique of Fig. 1
Flow chart, feed → injection → vacuumize → mold, realizes mass production.
Claims (8)
1. one kind is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that comprise the following steps：
1）Melting：Materials A DC12 is melted at 740 ± 20 DEG C, virgin material ratio is not less than 70%, then carry out refining and remove
Gas disposal,
2）Insulation：By step 1）Obtained aluminium liquid is placed in holding furnace, and holding temperature is 660-680 DEG C；
3）Mould is pre-processed：
A. the mould under chill state is preheated, mold cavity surface temperature control at 100-200 DEG C,
B. spraying lubrication is carried out to drift pressure chamber and mold cavity surface,
C. matched moulds after spraying, arranges sealing strip in a mold；
4）Feed：Aluminium liquid is taken out from holding furnace, is poured into pressure chamber, pressure chamber degree of filling is 45-50%；
5）Injection：With drift by the aluminium liquid press-in die die cavity in pressure chamber；
6）Vacuumize：Start after drift setting in motion and vacuumize, fill startup mould circulating temperature control system, dynamic model temperature control after the completion of type
Water cooling 60-80s of circulation time, the cooling of cover half temperature control water 80-100s of circulation time, 18-20s of high pressure spot cool time；Pass through
Collection mold temperature, adjust circulation time, and then adjust mold temperature so that cylinder holes core temperature be 80-150 DEG C, mould other
Profiled surface temperature is 100-200 DEG C；
7）Die sinking：Molded after casting solidification, take casting away.
2. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 1）In
Refining temperature be 700-740 DEG C, the degasification time be 5-10min.
3. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 2）In
Holding temperature spring, autumn are 675 DEG C, and summer is 670 DEG C, and winter is 680 DEG C.
4. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 3）In
Pressure chamber is lubricated with oil lubricant, spraying lubrication is carried out to mold cavity surface with water based paint.
5. one kind according to claim 4 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 3）In
Independent spray circuit is set in cylinder holes position, coating is 1 with the volume ratio of water:20-40, die cavity other positions coating and water
Volume ratio is 1:70—100.
6. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 4）In
Aluminium liquid pours into temperature >=630 DEG C in pressure chamber 20s, density equivalent≤2 of aluminium liquid.
7. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 5）
Middle injection technological parameter is that drift low speed speed is 0.3-0.4m/s, and entering the low high speed of completion at die cavity 10% ± 1% in liquation cuts
Change, filling speed is 45~55m/s, boost pressure is 700-800bar, hold the pressure time for 20-25s.
8. one kind according to claim 1 is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method, it is characterised in that step 6）In
, in below 250mbar, dustiness is in below 1300mbar for final vacuum.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311658A (en) * | 2018-02-08 | 2018-07-24 | 山东弗泽瑞金属科技有限公司 | Vacuum low speed pressure casting method |
| CN110756763A (en) * | 2018-07-27 | 2020-02-07 | 广东大冶摩托车技术有限公司 | High-vacuum die-casting production process for rear rocker arm of motorcycle |
| CN112894272A (en) * | 2021-01-11 | 2021-06-04 | 苏州亚德林股份有限公司 | Preparation method of battery pack shell cross beam |
| CN113080684A (en) * | 2021-03-31 | 2021-07-09 | 浙江众恒铝业有限公司 | Multi-color non-stick pan and production process thereof |
| CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
| CN113618040A (en) * | 2021-06-29 | 2021-11-09 | 重庆美利信科技股份有限公司 | Gearbox valve plate die-casting die, die-casting method and die maintenance method |
| CN114273633A (en) * | 2021-12-27 | 2022-04-05 | 芜湖永达科技有限公司 | Bilateral-feeding gantry cylinder die-casting process and system |
| CN114346202A (en) * | 2021-12-27 | 2022-04-15 | 芜湖永达科技有限公司 | Semicircular-hole-extruded gantry cylinder body die-casting process and system |
| CN118421989A (en) * | 2024-05-24 | 2024-08-02 | 浙江海威汽车零件有限公司 | Full-automatic production process of battery pack box body |
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Cited By (11)
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|---|---|---|---|---|
| CN108311658A (en) * | 2018-02-08 | 2018-07-24 | 山东弗泽瑞金属科技有限公司 | Vacuum low speed pressure casting method |
| CN110756763A (en) * | 2018-07-27 | 2020-02-07 | 广东大冶摩托车技术有限公司 | High-vacuum die-casting production process for rear rocker arm of motorcycle |
| CN112894272A (en) * | 2021-01-11 | 2021-06-04 | 苏州亚德林股份有限公司 | Preparation method of battery pack shell cross beam |
| CN113080684A (en) * | 2021-03-31 | 2021-07-09 | 浙江众恒铝业有限公司 | Multi-color non-stick pan and production process thereof |
| CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
| CN113618040A (en) * | 2021-06-29 | 2021-11-09 | 重庆美利信科技股份有限公司 | Gearbox valve plate die-casting die, die-casting method and die maintenance method |
| CN113369461B (en) * | 2021-06-29 | 2023-09-26 | 广东鸿图南通压铸有限公司 | Processing technology for aluminum alloy die casting high vacuum |
| CN113618040B (en) * | 2021-06-29 | 2023-11-10 | 重庆美利信科技股份有限公司 | Gearbox valve plate die-casting die, die-casting method and die maintenance method |
| CN114273633A (en) * | 2021-12-27 | 2022-04-05 | 芜湖永达科技有限公司 | Bilateral-feeding gantry cylinder die-casting process and system |
| CN114346202A (en) * | 2021-12-27 | 2022-04-15 | 芜湖永达科技有限公司 | Semicircular-hole-extruded gantry cylinder body die-casting process and system |
| CN118421989A (en) * | 2024-05-24 | 2024-08-02 | 浙江海威汽车零件有限公司 | Full-automatic production process of battery pack box body |
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| CN106756300B (en) | 2018-09-11 |
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