CN102861895A - Ultra-large type thin-wall complex part die-casting process - Google Patents
Ultra-large type thin-wall complex part die-casting process Download PDFInfo
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Abstract
An ultra-large type thin-wall complex part die-casting process is characterized by comprises the following steps: (1) according to structural characteristics and using occasions of casting products to confirm that a die parting surface is a curved parting surface and is of a side pouring row structure so as to ensure smooth molten metal in die casting, and simultaneously designing and manufacturing a required die; (2) aluminum alloy smelting, namely cleaning the aluminum alloy surface, placing the aluminum alloy into a crucible to be heated and molten, removing scum on the liquid level after smelting, and for ensuring the purification quality of the molten metal, performing slag removal operation for multiple times due to the fact that the quality of the molten metal impacts the inside and the outside quality of a casting; (3) die pressing, namely casting molten aluminum with molten-state temperature of 630-670 DEG C into a die-casting die cavity at the high pressing-shooting speed of 2.2-3.4m/s and the low pressing-shooting speed of 0.18-0.32m/s and in a quick pressing-shooting point of 360-450mm, crystallizing at the dwell time o 13-18s and obtaining the casting, wherein the die temperature in the process is 220-280 DEG C; and (4) performing surface treatment, namely performing polishing, grinding, chrome removal treatment before coating and coating.
Description
Technical field
The present invention relates to a kind of extrusion process, refer in particular to the thin-wall complicated part extrusion process of a kind of ultra-large type.
Background technology
Extrusion process is a kind of technique of finishing at the die casting machine of special use.Its basic craft course is: molten metal elder generation's low speed or high-speed casting fill in the die cavity of type progressive die tool, mould has movable cavity surface, it is along with the cooling procedure pressurization of molten metal is forged, both eliminated the shrinkage porosity defect of contraction cavity of blank, also make the interior tissue of blank reach the Broken Crystal of forging attitude, wherein the comprehensive mechanical performance of blank is significantly improved.In addition, this explained hereafter blank out, outer surface fineness reaches 7 grades, as cold-extrusion technology or machined surface, metallic luster is arranged.Therefore extrusion process is called as " limit forming technology ", more goes a step further than " without cutting, lack the surplus forming technology ".Extrusion process also has an advantageous feature to be, except producing traditional founding materials, it can also use deforming alloy, forging and pressing alloy, produces the very complicated part of structure.But the moulding for the complicated die casting of large thin-wall of existing extrusion process is comparatively difficult, and the smelting technology difficulty of aluminium alloy is also larger simultaneously, and wherein aluminium liquid quality is to affect one of die casting inside and outside quality-critical factor.Existing extrusion process because the parameters such as cast temperature, injection speed, pressure, time are unreasonable, causes end product quality to meet design requirement at the thin-wall complicated die casting of machining large in addition.
The inventor has namely proposed a kind of new technical scheme for the problems referred to above, realizes the thin-wall complicated part die cast of ultra-large type.
Summary of the invention
The present invention is directed to the disappearance of prior art existence, its main purpose provides the thin-wall complicated part extrusion process of the better ultra-large type of a kind of die casting quality.
For achieving the above object, the present invention adopts following technical scheme: the thin-wall complicated part extrusion process of ultra-large type, this technique comprises the steps:
(1) according to cast product design feature and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, and the smoothness of molten metal when guaranteeing die casting designs simultaneously and produces die needed;
(2) aluminium alloy smelting is cleaned out aluminum alloy surface, puts into heat fused in the crucible, remove the scum silica frost of liquid level after dissolving, because the good bad influence die casting of quality of molten metal inside and outside quality for guaranteeing the molten metal depuration quality, will be carried out in the aluminium alloy smelting process repeatedly except slag operation;
(3) carry out die casting, namely in fast shot speed: 2.2～3.4 m/s, slow shot speed: 0.18～0.32 m/s, the fast shot point: the aluminium liquid that under 360～450mm with the molten condition temperature is 630～670 ℃ is cast to the compression mod die cavity, and at pressure 700～900 kgf/c ㎡ high pressure compacted unders, its dwell time is 13～18s, and crystallization obtains foundry goods, and wherein mold temperature is 220～280 ℃ in the said process;
(4) carry out surface treatment, namely polish, the Trend of Chrome-free before the grinding, application processes and application.
After the present invention adopted technique scheme, its beneficial effect was: 1, according to the thin-wall complicated part product structure feature of ultra-large type and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, the smoothness of molten metal during with assurance die casting; 2, the analogue simulation analysis is carried out, the optimal design mould structure in velocity field, pressure field, the temperature field of metal flow; 3, aluminium alloy smelting: the complicated die casting of large thin-wall is except difficult forming, the smelting technology difficulty that also comprises aluminium alloy, the quality of molten metal quality, to affect one of die casting inside and outside quality-critical factor, so strict smelting technology rules (repeatedly slagging-off) operation by formulating guarantees the molten metal depuration quality; 4, in the pressure testing process, analyze and experiment adjustment is determined rational technological parameter by the CAE forming technique, namely cast temperature, injection speed, pressure, time etc. guarantee that the thin-wall complicated part die cast of ultra-large type and quality are better.
The specific embodiment
The present invention is described in detail below in conjunction with specific embodiment:
Embodiment 1: the thin-wall complicated part extrusion process of ultra-large type, this technique comprises the steps:
(1) according to cast product design feature and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, and the smoothness of molten metal when guaranteeing die casting designs simultaneously and produces die needed;
(2) aluminium alloy smelting is cleaned out aluminum alloy surface, puts into heat fused in the crucible, remove the scum silica frost of liquid level after dissolving, because the good bad influence die casting of quality of molten metal inside and outside quality for guaranteeing the molten metal depuration quality, will be carried out in the aluminium alloy smelting process repeatedly except slag operation;
(3) carry out die casting, carry out die casting, namely in fast shot speed: 3.4 m/s, slow shot speed: 0.32 m/s, the fast shot point: the aluminium liquid that under the 450mm with the molten condition temperature is 670 ℃ is cast to the compression mod die cavity, and at pressure 900 kgf/c ㎡ high pressure compacted unders, its dwell time is 13s, crystallization obtains foundry goods, and wherein mold temperature is 220 ℃ in the said process;
(4) carry out surface treatment, namely polish, the Trend of Chrome-free before the grinding, application processes and application.
Embodiment 2: the thin-wall complicated part extrusion process of ultra-large type, this technique comprises the steps:
(1) according to cast product design feature and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, and the smoothness of molten metal when guaranteeing die casting designs simultaneously and produces die needed;
(2) aluminium alloy smelting is cleaned out aluminum alloy surface, puts into heat fused in the crucible, remove the scum silica frost of liquid level after dissolving, because the good bad influence die casting of quality of molten metal inside and outside quality for guaranteeing the molten metal depuration quality, will be carried out in the aluminium alloy smelting process repeatedly except slag operation;
(3) carry out die casting, namely in fast shot speed: 2.2 m/s, slow shot speed: 0.18m/s, the fast shot point: the aluminium liquid that under the 360mm with the molten condition temperature is 630 ℃ is cast to the compression mod die cavity, and at pressure 700kgf/c ㎡ high pressure compacted under, its dwell time is 18s, and crystallization obtains foundry goods, and wherein mold temperature is 280 ℃ in the said process;
(4) carry out surface treatment, namely polish, the Trend of Chrome-free before the grinding, application processes and application.
Embodiment 3: the thin-wall complicated part extrusion process of ultra-large type, this technique comprises the steps:
(1) according to cast product design feature and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, and the smoothness of molten metal when guaranteeing die casting designs simultaneously and produces die needed;
(2) aluminium alloy smelting is cleaned out aluminum alloy surface, puts into heat fused in the crucible, remove the scum silica frost of liquid level after dissolving, because the good bad influence die casting of quality of molten metal inside and outside quality for guaranteeing the molten metal depuration quality, will be carried out in the aluminium alloy smelting process repeatedly except slag operation;
(3) carry out die casting, carry out die casting, namely in fast shot speed: 2.8 m/s, slow shot speed: 0.25 m/s, the fast shot point: the aluminium liquid that under the 410mm with the molten condition temperature is 650 ℃ is cast to the compression mod die cavity, and at pressure 800 kgf/c ㎡ high pressure compacted unders, its dwell time is 16s, crystallization obtains foundry goods, and wherein mold temperature is 250 ℃ in the said process;
(4) carry out surface treatment, namely polish, the Trend of Chrome-free before the grinding, application processes and application.
Of the present invention focusing on, 1, according to the thin-wall complicated part product structure feature of ultra-large type and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, the smoothness of molten metal when guaranteeing die casting; 2, the analogue simulation analysis is carried out, the optimal design mould structure in velocity field, pressure field, the temperature field of metal flow; 3, aluminium alloy smelting: the complicated die casting of large thin-wall is except difficult forming, the smelting technology difficulty that also comprises aluminium alloy, the quality of molten metal quality, to affect one of die casting inside and outside quality-critical factor, so strict smelting technology rules (repeatedly slagging-off) operation by formulating guarantees the molten metal depuration quality; 4, in the pressure testing process, analyze and experiment adjustment is determined rational technological parameter by the CAE forming technique, namely cast temperature, injection speed, pressure, time etc. guarantee that the thin-wall complicated part die cast of ultra-large type and quality are better.
The above, it only is preferred embodiment of the present invention, be not that technical scope of the present invention is imposed any restrictions, so every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment does.
Claims (1)
1. the thin-wall complicated part extrusion process of ultra-large type, it is characterized in that: this technique comprises the steps:
(1) according to cast product design feature and use occasion, determine that mold parting surface adopts the curved surface die joint, side is watered row's structure, and the smoothness of molten metal when guaranteeing die casting designs simultaneously and produces die needed;
(2) aluminium alloy smelting is cleaned out aluminum alloy surface, puts into heat fused in the crucible, remove the scum silica frost of liquid level after dissolving, because the good bad influence die casting of quality of molten metal inside and outside quality for guaranteeing the molten metal depuration quality, will be carried out in the aluminium alloy smelting process repeatedly except slag operation;
(3) carry out die casting, namely in fast shot speed: 2.2～3.4 m/s, slow shot speed: 0.18～0.32 m/s, the fast shot point: the aluminium liquid that under 360～450mm with the molten condition temperature is 630～670 ℃ is cast to the compression mod die cavity, and at pressure 700～900 kgf/c ㎡ high pressure compacted unders, its dwell time is 13～18s, and crystallization obtains foundry goods, and wherein mold temperature is 220～280 ℃ in the said process;
(4) carry out surface treatment, namely polish, the Trend of Chrome-free before the grinding, application processes and application.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384471A (en) * | 2013-08-30 | 2015-03-04 | 束荣辉 | Extrusion die casting method for thin-wall aluminum alloy automobile engine pump body cover |
| CN105817604A (en) * | 2013-08-30 | 2016-08-03 | 束荣辉 | Extrusion die casting method for thin-walled aluminum alloy component used for automobile engine |
| CN107470579A (en) * | 2017-08-30 | 2017-12-15 | 安徽省含山县潮林铸管厂（普通合伙） | A kind of processing method for improving alloy electric machine casing mechanical property |
| CN111004946A (en) * | 2019-12-30 | 2020-04-14 | 宁波杰达模具机械有限公司 | Die-casting forming process of gearbox clutch shell |
| CN112176200A (en) * | 2020-09-01 | 2021-01-05 | 帅翼驰(上海)铝合金设备有限公司 | Recycling production process of aluminum die-casting waste |
| CN114700475A (en) * | 2022-03-15 | 2022-07-05 | 美诺精密汽车零部件(南通)有限公司 | Flexible die-casting process of thin-wall shell casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384471A (en) * | 2013-08-30 | 2015-03-04 | 束荣辉 | Extrusion die casting method for thin-wall aluminum alloy automobile engine pump body cover |
| CN104384471B (en) * | 2013-08-30 | 2016-06-01 | 束荣辉 | The extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid |
| CN105817604A (en) * | 2013-08-30 | 2016-08-03 | 束荣辉 | Extrusion die casting method for thin-walled aluminum alloy component used for automobile engine |
| CN107470579A (en) * | 2017-08-30 | 2017-12-15 | 安徽省含山县潮林铸管厂（普通合伙） | A kind of processing method for improving alloy electric machine casing mechanical property |
| CN111004946A (en) * | 2019-12-30 | 2020-04-14 | 宁波杰达模具机械有限公司 | Die-casting forming process of gearbox clutch shell |
| CN112176200A (en) * | 2020-09-01 | 2021-01-05 | 帅翼驰(上海)铝合金设备有限公司 | Recycling production process of aluminum die-casting waste |
| CN114700475A (en) * | 2022-03-15 | 2022-07-05 | 美诺精密汽车零部件(南通)有限公司 | Flexible die-casting process of thin-wall shell casting |
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Application publication date: 20130109 |