CN103506595A - Die-casting technology of hypereutectic aluminum alloy clutch gear - Google Patents
Die-casting technology of hypereutectic aluminum alloy clutch gear Download PDFInfo
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- CN103506595A CN103506595A CN201310092478.7A CN201310092478A CN103506595A CN 103506595 A CN103506595 A CN 103506595A CN 201310092478 A CN201310092478 A CN 201310092478A CN 103506595 A CN103506595 A CN 103506595A
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Abstract
The invention discloses a die-casting technology of a hypereutectic aluminum alloy clutch gear. The die-casting technology comprises the steps of design of a die, debugging of a die-casting machine, installation and preheating of a die, aluminum alloy smelting, casting injection, vacuum die casting, partial pressurization, pressure maintaining, die opening and workpiece taking, surface quality detection, clearing, aging treatment and final testing. According to the steps of the die-casting technology, firstly, design of the die comprises the steps that the Flow4D software is applied, analog computation is conducted on a technological scheme, analog simulation and analysis are conducted on the velocity field, the pressure field and the temperature field of metal flow, and design of a die structure is optimized; secondly, aluminum alloy smelting comprises the steps that modification is conducted in the process of smelting of aluminum alloy ADC14, and the form of primary Si is changed into a particle shape from a thick rod shape; thirdly, vacuum casting comprises the steps that a mechanical vacuum valve is used for pumping air in the die out; fourthly, partial pressurization comprises the steps that a pressurizing rod forcedly squeezes molten metal in the middle of a liquid collection bag into the position of the thick wall of a center hole of the gear, and feeding is completed. By the adoption of the die-casting technology of the hypereutectic aluminum alloy clutch gear, the defects that a thick-wall part (the thickness of the wall ranges from 11mm to 14mm) is quite prone to air hole shrinkage in the process of die casting is overcome, the inner quality of the cast piece is greatly improved, and the technical requirements of the part are met.
Description
Technical field
The present invention relates to a kind of metal casting technique, especially relate to a kind of extrusion process of hypereutectic aluminium alloy clutch gear.
Background technology
Requirement based on automotive light weight technology in recent years, increasing auto parts are just progressively changed into the light materials such as aluminium, magnesium, plastics by steel, iron, with aluminium, for steel/iron, be wherein the main development direction of current automotive light weight technology.Tradition forming method is sand mold moulding by casting or die moulding by casting.Adopt traditional pressure casting method moulding to have the outstanding problem of Liang Ge aspect: the one, technology quality index does not reach instructions for use.Outstanding behaviours is: interiors of products pore, many dense structures of sand holes property are poor, machined surface occurs that a large amount of pores, sand holes are large, many after intensity difference, following process, and production cost is high, and production efficiency is low.
Compression casting be in metal working process in modern age development faster less a kind of or without cutting Special Processes of Metal Castings method.It is by motlten metal at high-voltage high-speed retrofilling casting mold, and under high pressure crystallization and freezing forms the process of foundry goods.
Hypereutectic Al-Si Alloy is owing to having the features such as thermal coefficient of expansion is little, density is little, wear-resisting and high-temperature behavior good, casting character is good, is that high strength, wear-resisting, low bulk part are as the ideal material of piston of automobile, cylinder block, swash plate, clutch gear etc.
Summary of the invention
The technical problem to be solved in the present invention:
A kind of die casting and production technology that is applicable to excavator guidance set guiding aluminium wheel is provided, and to solve, existing heavy section casting adopts sand casting moulding or the existing cost of die moulding by casting is high and the low problem of production efficiency.
Technical scheme of the present invention: Mould design → die casting machine debugging → pressing mold is installed preheating → aluminium alloy smelting → casting and penetrated check at pressure → evacuated die-casting process → pressurized → pressurize → die sinking pickup → surface quality inspection → cleaning → Ageing Treatment → end.
(1) Mould design in above-mentioned technological process: adopt Flow4D software, process program has been carried out to analog computation, analogue simulation analysis is carried out in the velocity field of metal flow, pressure field, temperature field, optimal design mould structure;
(2) aluminium alloy smelting: aluminium alloy ADC14 adopts rotten processing in melting, and the form of primary silicon is from the thick shaft-like graininess that becomes;
(3) evacuated die-casting process: the mechanical vacuum valve of employing is extracted air in grinding tool out;
(4) pressurized: pressure rod is forced the molten metal in the middle of liquid collecting bag to clamp-on the heavy wall place of gear center hole, completes feeding.
Beneficial effect of the present invention:
To the clutch gear integrated application of Hypereutectic Al-Si Alloy the key technologies such as mould numerical simulation, rotten processing, evacuated die-casting process, pressurized, efficiently solve the defects such as pore shrinkage porosite that thick-walled parts (wall thickness 11～14mm) very easily occurs in Die Casting, Internal Quality of Cast greatly improves, met the specification requirement of part, and realized batch production, comprehensive percent defective is below 5%.
The specific embodiment
Embodiment: the present embodiment is a kind of hypereutectic aluminium alloy clutch gear, and foundry goods appearance and size is 158mm * 72mm.Castings material is ADC14, and wall thickness is 11～14mm.Its extrusion process comprises the steps:
Mould design → die casting machine debugging → pressing mold is installed preheating → aluminium alloy smelting → casting and is penetrated check at pressure → evacuated die-casting process → pressurized → pressurize → die sinking pickup → surface quality inspection → cleaning → Ageing Treatment → end.
(1) Mould design in above-mentioned technological process: adopt Flow4D software, process program has been carried out to analog computation, analogue simulation analysis is carried out in the velocity field of metal flow, pressure field, temperature field, optimal design mould structure;
(2) aluminium alloy smelting: aluminium alloy ADC14 is heated to 760 ℃ of thawings in melting furnace, then enter holding furnace and carry out 720 ℃ of insulations 6 hours, after the rotten processing of P-Cu, the form of primary silicon, from thick shaft-like 30～50 μ m graininess that become, meets the gear technique requirement of clutch;
(3) evacuated die-casting process: adopt mechanical vacuum valve and high vacuum control system, by air sucking-off in mould, good exhaust effect percent defective is low;
(4) pressurized: because the heavy wall at gear interstitial hole place is difficult for feeding, be prone to shrinkage defect, be provided with pressurized point for this reason, the present embodiment is at the extra columniform liquid collecting bag that increases in the interstitial hole place of gear, liquid collecting Bao lower end joins by the inwall of a circular passage and gear center hole, during local extruding, pressure rod is forced the molten metal in the middle of cylindrical liquid collecting bag to squeeze the heavy wall place of gear center hole, completes feeding.
Claims (5)
1. the Die Casting technique of a hypereutectic aluminium alloy clutch gear comprises: Mould design → die casting machine debugging → pressing mold is installed preheating → aluminium alloy smelting → casting and penetrated check at pressure → evacuated die-casting process → pressurized → pressurize → die sinking pickup → surface quality inspection → cleaning → Ageing Treatment → end.
2. described in claim 1, Mould design is characterized by: adopt Flow4D software, process program has been carried out to analog computation, analogue simulation analysis is carried out in the velocity field of metal flow, pressure field, temperature field, optimal design mould structure.
3. described in claim 1, aluminium alloy smelting is characterized by: aluminium alloy ADC14 is heated to 760 ℃ of thawings in melting furnace, then enter holding furnace and carry out 720 ℃ of insulations 6 hours, after the rotten processing of P-Cu, the form of primary silicon is from thick shaft-like 30～50 μ m graininess that become.
4. described in claim 1, evacuated die-casting process is characterized by: the mechanical vacuum valve of employing is extracted air in grinding tool out.
5. described in claim 1, pressurized is characterized by: pressure rod is forced the molten metal in the middle of liquid collecting bag to clamp-on the heavy wall place of gear center hole, completes feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310092478.7A CN103506595A (en) | 2013-03-22 | 2013-03-22 | Die-casting technology of hypereutectic aluminum alloy clutch gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310092478.7A CN103506595A (en) | 2013-03-22 | 2013-03-22 | Die-casting technology of hypereutectic aluminum alloy clutch gear |
Publications (1)
| Publication Number | Publication Date |
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| CN103506595A true CN103506595A (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310092478.7A Withdrawn CN103506595A (en) | 2013-03-22 | 2013-03-22 | Die-casting technology of hypereutectic aluminum alloy clutch gear |
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| CN (1) | CN103506595A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801669A (en) * | 2015-04-27 | 2015-07-29 | 无锡蠡湖增压技术股份有限公司 | Mold provided with automatic pressurizing device and used for preventing shrinkage and loosening |
| CN106583683A (en) * | 2016-12-28 | 2017-04-26 | 宁波臻至机械模具有限公司 | Two-position pressurizing die-casting mold |
| CN106623850A (en) * | 2016-12-28 | 2017-05-10 | 宁波臻至机械模具有限公司 | Pressure-casting die for performing local pressurization with squeezing slag package |
| CN106825497A (en) * | 2016-12-28 | 2017-06-13 | 宁波臻至机械模具有限公司 | A kind of method that application extruding cinder ladle carries out pressurized |
Citations (3)
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| CN1757459A (en) * | 2005-10-30 | 2006-04-12 | 朴龙云 | Method for preparing semi-solidified slurry of aluminium alloy, and its forming apparatus |
| JP2009279643A (en) * | 2008-05-26 | 2009-12-03 | Toyota Central R&D Labs Inc | Al ALLOY DIE CASTING, AND METHOD FOR PRODUCING THE SAME |
| CN101671787A (en) * | 2009-10-23 | 2010-03-17 | 瑞立集团瑞安汽车零部件有限公司 | Natural destressing die-casting aluminum alloy and preparation method thereof |
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2013
- 2013-03-22 CN CN201310092478.7A patent/CN103506595A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757459A (en) * | 2005-10-30 | 2006-04-12 | 朴龙云 | Method for preparing semi-solidified slurry of aluminium alloy, and its forming apparatus |
| JP2009279643A (en) * | 2008-05-26 | 2009-12-03 | Toyota Central R&D Labs Inc | Al ALLOY DIE CASTING, AND METHOD FOR PRODUCING THE SAME |
| CN101671787A (en) * | 2009-10-23 | 2010-03-17 | 瑞立集团瑞安汽车零部件有限公司 | Natural destressing die-casting aluminum alloy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 万里等: "高强耐磨过共晶铝合金离合器齿轮的压铸技术", 《特种铸造及有色合金》, vol. 32, no. 3, 20 March 2012 (2012-03-20), pages 247 - 250 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801669A (en) * | 2015-04-27 | 2015-07-29 | 无锡蠡湖增压技术股份有限公司 | Mold provided with automatic pressurizing device and used for preventing shrinkage and loosening |
| CN106583683A (en) * | 2016-12-28 | 2017-04-26 | 宁波臻至机械模具有限公司 | Two-position pressurizing die-casting mold |
| CN106623850A (en) * | 2016-12-28 | 2017-05-10 | 宁波臻至机械模具有限公司 | Pressure-casting die for performing local pressurization with squeezing slag package |
| CN106825497A (en) * | 2016-12-28 | 2017-06-13 | 宁波臻至机械模具有限公司 | A kind of method that application extruding cinder ladle carries out pressurized |
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Application publication date: 20140115 |