CN105215314A - A kind of auto parts machinery pressure casting method - Google Patents
A kind of auto parts machinery pressure casting method Download PDFInfo
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- CN105215314A CN105215314A CN201510600644.9A CN201510600644A CN105215314A CN 105215314 A CN105215314 A CN 105215314A CN 201510600644 A CN201510600644 A CN 201510600644A CN 105215314 A CN105215314 A CN 105215314A
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Abstract
The invention discloses a kind of pressure casting method of auto parts machinery, relate to die cast metal technical field, adopt a kind of aluminium alloy, comprise the following steps: melt; Metamorphism treatment degasification; Die casting; Cooling; Annealing, namely completes the die casting of product.The present invention can solve owing to have employed this aluminium alloy, and the tensile strength of the product made, modifying-refining tissue, heat resistance, percentage elongation and plasticity are obtained for obvious improvement; Inside die-casting part pore fraction defective significantly reduces, and product percent of pass has brought up to more than 90%; Owing to having carried out degasification in material process, inside has not had bubble, and after annealing, toughness of products is also better; Adopt vacuum pressing and casting mode, casting surface can be very meticulous, can produce light or veined surface, and can reduce waste material when producing, and the also recyclable recycling of the mouth of a river or additional waste material, reduces costs.
Description
Technical field
The present invention relates to die cast metal technical field, specifically a kind of auto parts machinery pressure casting method.
Background technology
At auto parts machinery production industry, the common die-casting technique of usual employing carries out the production of auto parts machinery, and the die casting that die-casting technique common is at present produced, the particularly auto parts machinery of aluminium alloy, easily there is pore in tissue and cause bad phenomenon, simultaneously again due to Al-alloy parts there is poor toughness, the defect such as intensity is low, mechanical performance is not high, corrosion-resistant, resistance to elevated temperatures is poor, waste material is many, expense manpower.
Summary of the invention
The object of the present invention is to provide a kind of auto parts machinery pressure casting method, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of auto parts machinery pressure casting method of the present invention, adopt a kind of aluminium alloy, this aluminium alloy component comprises (wt%):
Mg:0.5 ~ 1.4, Si:0.4 ~ 0.8, Fe:0.15 ~ 0.4, Mn:0.3 ~ 0.5, Ti:0.1 ~ 0.15, Sc:0.06 ~ 0.08, As:0.001 ~ 0.005, Li:0.005 ~ 0.009, Cr:0.005 ~ 0.01, V:0.001 ~ 0.007, all the other are aluminium and inevitable impurity.
Comprise the following steps:
S1, aluminium alloy stock is placed in and burns stove, under inert gas shielding, be heated to 660 DEG C, alloy raw material liquefied and forms molten metal;
S2, to stir with graphite rod and to shake molten metal, discharging the gas in molten metal;
S3, temperature rise to 690 ~ 710 DEG C, add the deslagging agent that consumption is material 0.6% ~ 0.8%, stir 16 minutes, remove clean surface scum silica frost, then temperature is elevated to 740 DEG C-750 DEG C, the Sb alterant of 0.2% of furnace charge gross weight is put into smelting furnace, after temperature return is to 740 DEG C-750 DEG C, carry out Metamorphism treatment, after stirring, make it mix, leave standstill 5min;
S4, use getter, soup is melted to maintenance stove and carries out rotation degasification 5 ~ 10 minutes, 10 ~ 15 minutes are left standstill at the temperature of 710 ~ 720 DEG C, then sampling uses hydrogen meter to carry out the test of aluminium material air content, air content is controlled be less than or equal to 0.4 milliliter/100 grams, then cool to 680 DEG C and carry out die casting;
S5, mould is fixed on casting machine, first barrel preheating 3 times (is used aluminium liquid 670-690 DEG C, send into barrel, 30-60s after coagulation, aluminium liquid is sent into again) after manually ejecting, open cooling water, make mould reach thermal balance 180-220 DEG C, in mold cavity, evenly spray one layer of heat preservation coating; In mold cavity, evenly spray one deck releasing agent after each depanning, releasing agent thinner ratio is the thickness of 1:90 release agent coating is 20-25 micron;
S6, by being communicated with the input channel burning stove and mould, molten metal being injected die cavity, by be arranged on input channel and to be communicated with the piston apparatus of inert gas, promoting piston push rod, to die cavity pressurization, making molten metal fill up die cavity;
S7, die casting, concrete technology parameter is as follows: system pressure: 15-18Mpa, spray time 3 ~ 6s, cast temperature: 680 ~ 700 DEG C, gate velocity is less than 0.5m/s, and die casting time of staying in mould is 4s.After cooling forming, foundry goods is taken out in die sinking.
S8, carry out annealing in process to foundry goods, annealing process: within three hours, be warming up to 300 DEG C, insulation 7h, air cooling of then coming out of the stove, namely obtains shaping product.
Inert gas in step 1 is nitrogen or argon gas.
Compared with prior art, the invention has the beneficial effects as follows:
1, owing to have employed this aluminium alloy, the tensile strength of the product made, modifying-refining tissue, heat resistance, percentage elongation and plasticity are obtained for obvious improvement;
2, inside die-casting part pore fraction defective significantly reduces, and product percent of pass has brought up to more than 90%;
3, owing to having carried out degasification in material process, inside does not have bubble, and after annealing, toughness of products is also better;
4, the present invention heats aluminium alloy stock and forms molten metal under inert gas shielding, molten metal non-oxidation is reacted, after molten metal is injected die cavity, under vacuum and die cavity pressurized conditions, molten metal flowing is smooth and easy, so do not need to add a large amount of element silicon, the auto parts machinery of thus institute's die casting can carry out anodic oxidation;
5, adopt vacuum pressing and casting mode, casting surface can be very meticulous, can produce light or veined surface, and can reduce waste material when producing, and the also recyclable recycling of the mouth of a river or additional waste material, reduces costs;
6, preparation technology is simple, and the production time is short, and production efficiency is high, and obtained auto parts machinery surface does not need polishing just can reach required effect, improves the quality of products, and saves much manually, has not only saved time but also environmental protection.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
A kind of auto parts machinery pressure casting method of the present invention, adopt a kind of aluminium alloy, this aluminium alloy component comprises (wt%):
Mg:0.5 ~ 1.4, Si:0.4 ~ 0.8, Fe:0.15 ~ 0.4, Mn:0.3 ~ 0.5, Ti:0.1 ~ 0.15, Sc:0.06 ~ 0.08, As:0.001 ~ 0.005, Li:0.005 ~ 0.009, Cr:0.005 ~ 0.01, V:0.001 ~ 0.007, all the other are aluminium and inevitable impurity.
Comprise the following steps:
S1, aluminium alloy stock is placed in and burns stove, under inert gas shielding, be heated to 660 DEG C, alloy raw material liquefied and forms molten metal;
S2, to stir with graphite rod and to shake molten metal, discharging the gas in molten metal;
S3, temperature rise to 690 ~ 710 DEG C, add the deslagging agent that consumption is material 0.6% ~ 0.8%, stir 16 minutes, remove clean surface scum silica frost, then temperature is elevated to 740 DEG C-750 DEG C, the Sb alterant of 0.2% of furnace charge gross weight is put into smelting furnace, after temperature return is to 740 DEG C-750 DEG C, carry out Metamorphism treatment, after stirring, make it mix, leave standstill 5min;
S4, use getter, soup is melted to maintenance stove and carries out rotation degasification 5 ~ 10 minutes, 10 ~ 15 minutes are left standstill at the temperature of 710 ~ 720 DEG C, then sampling uses hydrogen meter to carry out the test of aluminium material air content, air content is controlled be less than or equal to 0.4 milliliter/100 grams, then cool to 680 DEG C and carry out die casting;
S5, mould is fixed on casting machine, first barrel preheating 3 times (is used aluminium liquid 670-690 DEG C, send into barrel, 30-60s after coagulation, aluminium liquid is sent into again) after manually ejecting, open cooling water, make mould reach thermal balance 180-220 DEG C, in mold cavity, evenly spray one layer of heat preservation coating; In mold cavity, evenly spray one deck releasing agent after each depanning, releasing agent thinner ratio is the thickness of 1:90 release agent coating is 20-25 micron;
S6, by being communicated with the input channel burning stove and mould, molten metal being injected die cavity, by be arranged on input channel and to be communicated with the piston apparatus of inert gas, promoting piston push rod, to die cavity pressurization, making molten metal fill up die cavity;
S7, die casting, concrete technology parameter is as follows: system pressure: 15-18Mpa, spray time 3 ~ 6s, cast temperature: 680 ~ 700 DEG C, gate velocity is less than 0.5m/s, and die casting time of staying in mould is 4s.After cooling forming, foundry goods is taken out in die sinking.
S8, carry out annealing in process to foundry goods, annealing process: within three hours, be warming up to 300 DEG C, insulation 7h, air cooling of then coming out of the stove, namely obtains shaping product.
Inert gas in step 1 is nitrogen or argon gas.
Claims (3)
1. an auto parts machinery pressure casting method, is characterized in that, is made up of the raw material of following weight parts: adopt a kind of aluminium alloy, and this aluminium alloy component comprises (wt%):
Mg:0.5 ~ 1.4, Si:0.4 ~ 0.8, Fe:0.15 ~ 0.4, Mn:0.3 ~ 0.5, Ti:0.1 ~ 0.15, Sc:0.06 ~ 0.08, As:0.001 ~ 0.005, Li:0.005 ~ 0.009, Cr:0.005 ~ 0.01, V:0.001 ~ 0.007, all the other are aluminium and inevitable impurity;
Comprise the following steps:
S1, aluminium alloy stock is placed in and burns stove, under inert gas shielding, be heated to 660 DEG C, alloy raw material liquefied and forms molten metal;
S2, to stir with graphite rod and to shake molten metal, discharging the gas in molten metal;
S3, temperature rise to 690 ~ 710 DEG C, add the deslagging agent that consumption is material 0.6% ~ 0.8%, stir 16 minutes, remove clean surface scum silica frost, then temperature is elevated to 740 DEG C-750 DEG C, the Sb alterant of 0.2% of furnace charge gross weight is put into smelting furnace, after temperature return is to 740 DEG C-750 DEG C, carry out Metamorphism treatment, after stirring, make it mix, leave standstill 5min;
S4, use getter, soup is melted to maintenance stove and carries out rotation degasification 5 ~ 10 minutes, 10 ~ 15 minutes are left standstill at the temperature of 710 ~ 720 DEG C, then sampling uses hydrogen meter to carry out the test of aluminium material air content, air content is controlled be less than or equal to 0.4 milliliter/100 grams, then cool to 680 DEG C and carry out die casting;
S5, mould is fixed on casting machine, first by barrel preheating 3 times, opens cooling water, make mould reach thermal balance 180-220 DEG C, in mold cavity, evenly spray one layer of heat preservation coating; In mold cavity, evenly spray one deck releasing agent after each depanning, releasing agent thinner ratio is the thickness of 1:90 release agent coating is 20-25 micron;
S6, by being communicated with the input channel burning stove and mould, molten metal being injected die cavity, by be arranged on input channel and to be communicated with the piston apparatus of inert gas, promoting piston push rod, to die cavity pressurization, making molten metal fill up die cavity;
S7, die casting, concrete technology parameter is as follows: system pressure: 15-18Mpa, spray time 3 ~ 6s, cast temperature: 680 ~ 700 DEG C, gate velocity is less than 0.5m/s, and die casting time of staying in mould is 4s, and after cooling forming, foundry goods is taken out in die sinking;
S8, carry out annealing in process to foundry goods, annealing process: within three hours, be warming up to 300 DEG C, insulation 7h, air cooling of then coming out of the stove, namely obtains shaping product.
2. a kind of auto parts machinery pressure casting method according to claim 1, is characterized in that, the inert gas in step 1 is nitrogen.
3. a kind of auto parts machinery pressure casting method according to claim 1, is characterized in that, the inert gas in step 1 is argon gas.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522134A (en) * | 2016-02-17 | 2016-04-27 | 苏州浦石精工科技有限公司 | Mold-casting molding method of automobile generator end cover |
| CN106244870A (en) * | 2016-08-31 | 2016-12-21 | 宁波环亚机械制造有限公司 | A kind of production technology of automobile diecast parts |
| CN108441721A (en) * | 2018-05-22 | 2018-08-24 | 南通鸿劲金属铝业有限公司 | A kind of eutectic Al-base alloy material |
| CN108746535A (en) * | 2018-05-30 | 2018-11-06 | 苏州阜丰实业有限公司 | A kind of processing technology of corrosion-resistant die casting |
| CN108788059A (en) * | 2018-05-30 | 2018-11-13 | 苏州阜丰实业有限公司 | A kind of processing technology of anemobiagraph |
| CN110142388A (en) * | 2019-06-11 | 2019-08-20 | 天津磊峰实业有限公司 | A kind of processing method of automobile parts die cast |
| CN110205526A (en) * | 2019-06-28 | 2019-09-06 | 南京斯庄森金属材料有限公司 | A kind of automobile oil cooler casting and its die-casting process |
| CN111378878A (en) * | 2018-12-29 | 2020-07-07 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
| CN113210580A (en) * | 2021-05-11 | 2021-08-06 | 胜赛思精密压铸（扬州）有限公司 | Casting method of high-mechanical-property AlSi9Cu3 die casting |
| CN113909448A (en) * | 2021-10-09 | 2022-01-11 | 润星泰(常州)技术有限公司 | Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting |
| CN115213368A (en) * | 2022-07-26 | 2022-10-21 | 浙江德洲五金有限公司 | Die-casting method for anti-fatigue handle |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522134A (en) * | 2016-02-17 | 2016-04-27 | 苏州浦石精工科技有限公司 | Mold-casting molding method of automobile generator end cover |
| CN106244870A (en) * | 2016-08-31 | 2016-12-21 | 宁波环亚机械制造有限公司 | A kind of production technology of automobile diecast parts |
| CN108441721A (en) * | 2018-05-22 | 2018-08-24 | 南通鸿劲金属铝业有限公司 | A kind of eutectic Al-base alloy material |
| CN108746535A (en) * | 2018-05-30 | 2018-11-06 | 苏州阜丰实业有限公司 | A kind of processing technology of corrosion-resistant die casting |
| CN108788059A (en) * | 2018-05-30 | 2018-11-13 | 苏州阜丰实业有限公司 | A kind of processing technology of anemobiagraph |
| CN111378878A (en) * | 2018-12-29 | 2020-07-07 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
| CN111378878B (en) * | 2018-12-29 | 2021-10-26 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
| CN110142388A (en) * | 2019-06-11 | 2019-08-20 | 天津磊峰实业有限公司 | A kind of processing method of automobile parts die cast |
| CN110205526A (en) * | 2019-06-28 | 2019-09-06 | 南京斯庄森金属材料有限公司 | A kind of automobile oil cooler casting and its die-casting process |
| CN113210580A (en) * | 2021-05-11 | 2021-08-06 | 胜赛思精密压铸（扬州）有限公司 | Casting method of high-mechanical-property AlSi9Cu3 die casting |
| CN113909448A (en) * | 2021-10-09 | 2022-01-11 | 润星泰(常州)技术有限公司 | Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting |
| CN115213368A (en) * | 2022-07-26 | 2022-10-21 | 浙江德洲五金有限公司 | Die-casting method for anti-fatigue handle |
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