CN104384471B - The extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid - Google Patents

The extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid Download PDF

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CN104384471B
CN104384471B CN201310391347.9A CN201310391347A CN104384471B CN 104384471 B CN104384471 B CN 104384471B CN 201310391347 A CN201310391347 A CN 201310391347A CN 104384471 B CN104384471 B CN 104384471B
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aluminum alloy
die casting
extruding
casting
thin
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CN104384471A (en
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束荣辉
陈革新
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Jiangsu Huasheng Electric Technology Co., Ltd.
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束荣辉
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Abstract

The present invention relates to the extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid, it is suitable for acquisition resistance to air loss and compactness is better, conforming product rate is higher, shape and structure is complicated and the motor car engine pump housing lid of thin-walled. The step of the extruding die casting of described extruding pressure casting method comprises: employing is quantitatively watered cup and carried aluminum alloy melt from holding furnace to charging barrel of die casting machine room, Squeezing die casting machine drift steadily advances aluminum alloy melt to mold cavity, the process of this propelling aluminum alloy melt comprises three phases successively: the first stage is extruding die casting speed, propelling stroke accounts for omnidistance 50-60%, so that material cylinder air is escaped, alloy liquid enters at a slow speed die cavity stage casing, allows air escape and minimizing wrap up in gas; Subordinate phase: be the die casting speed of horizontal plunger die casting machine, propelling stroke accounts for omnidistance 33-43%, makes product fill type completely with quick injection, by rapid shaping to solve cold shut; Phase III: pressurize feeding and compacting crystal grain, obtain spray.

Description

The extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid
Technical field
The present invention relates to casting field, it is specifically related to the extruding pressure casting method of a kind of thin-walled aluminum alloys component, especially the extruding pressure casting method of motor car engine pump housing lid, cylinder head, cylinder cover etc.
Background technology
In order to energy-saving and cost-reducing, minimizing exhaust gas emission, improving and drive comfort level and vehicle mechanical property, present automobile develops to lightweight direction. From the angle of structured material, it is achieved the light-weighted main means of vehicle adopt to have the high light material than performance (specific tenacity and specific rigidity) replacement traditional material. Aluminum alloy materials, has price low, high than features such as performance, outstanding damping vibration attenuation performances. Aluminium alloy is used for vehicle structure, vehicle deadweight and fuel oil consumption can be reduced, reduce the vibration & noise of vehicle, it is to increase the acceleration and deceleration dynamics of vehicle, can reach the object of energy-conserving and environment-protective, can significantly improve again the driving comfort level of vehicle. The application of aluminium alloy on automobile gets more and more, and the functional part mainly adopting casting or the housing type part of some of Die Casting and wall thickness bigger, such as vehicle frame, the pump housing, oil pan, gas valve housing cover, air valve room, wheel hub, oil filter base, fuel oil seat etc.
For thin-wall aluminum alloy motor car engine pump housing lid; most employing aluminium alloy tradition pressure casting method is produced at present; the engine pump housing that the manufacture technics adopting these traditional goes out covers and presents the defect in various degree such as cold shut, depression, crackle in outward appearance; and the fatal defects such as pore, shrinkage cavity, pin hole often occur in inside; thus seriously have impact on the air-tightness of product, hinder the development of automobile lightweight, environmental protection. That is, when the advantage of tradition pressure die-casting machine produces complicated part, thin-walled part, forming ability is good, applied widely, but cannot effectively solve the pore of die casting, shrinkage cavity, and loose problem, high conforming product rate is on the low side to cause resistance to air loss to require.
Extrusion technique be generally used for interiors of products dense structure property and without obvious bubble requirement higher, shape and structure is relatively simple, thick-walled structure part (wall thickness is generally greater than 5mm), forming shape is complicated, wall thickness is thinner, outward appearance, gloss have certain requirements, and thin-wall die casting (wall thickness is generally less than 3mm) just is difficult to obtain. And the cold room Hpdc of routine cannot effectively solve the problems such as goods bubble is more, compactness is lower.
Adopting aluminium alloy extrusion casting to produce above-mentioned thin-wall aluminum alloy motor car engine pump housing lid, also there is limitation, one is that injection speed causes cavity filling ability not enough slowly, and complicated foundry goods can not fill type very well; Two is that axially (thickness) dimensional precision is low. That is, conventional extruded casting advantage is the resistance to air loss problem that can effectively solve pressure die-casting machine, can solve pore from source, the condition that shrinkage cavity is loosened and produced, but shortcoming is cavity filling ability deficiency, and complicated part, thin-walled part can not be effectively shaping.
Summary of the invention
Technical problem to be solved by this invention is to provide the extruding pressure casting method of a kind of thin-walled aluminum alloys component, and the method is suitable for acquisition resistance to air loss and compactness is better, conforming product rate is higher, shape and structure is complicated and the motor car engine pump housing lid of thin-walled, cylinder head, cylinder cover etc.
For solving the problems of the technologies described above, the extruding pressure casting method of thin-walled aluminum alloys component provided by the invention, comprises the step of extruding die casting; This step comprises: employing is quantitatively watered cup and carried aluminum alloy melt from holding furnace to charging barrel of die casting machine room, and Squeezing die casting machine drift steadily advances aluminum alloy melt to mold cavity, and the process of this propelling aluminum alloy melt comprises three phases successively:
First stage: drift advances (being extruding die casting speed) with the speed of 300-400mm/s, and propelling stroke accounts for omnidistance 50-60%, so that material cylinder air is escaped, alloy liquid enters at a slow speed die cavity stage casing, air escape and minimizing is allowed to wrap up in gas;
Subordinate phase: drift, to be greater than the preferred 2000-3000mm/s of 1000mm/s(, is the die casting speed of horizontal plunger die casting machine) speed advance, propelling stroke accounts for omnidistance 33-43%, makes product fill type completely with quick injection, by rapid shaping to solve cold shut;
Phase III: drift with section more than the low-speed propulsion of 200mm/s, the compacting crystal grain with pressurize feeding; And in the ftercompction of cast gate place after postponing the 5-8 second, be the feeding of cast gate high-temperature zone, obtain spray.
Advancing in the process of aluminum alloy melt, Squeeze Casting Parameters on Microstructure is: squeeze pressure is 20-30MPa, dwell time 15-20s.
As further preferred, described squeeze pressure is 25-26MPa, dwell time 17s.
An extruding pressure casting method for thin-wall aluminum alloy motor car engine pump housing lid, cylinder head or cylinder cover, it comprises the step of above-mentioned extruding die casting.
A kind of thin-wall aluminum alloy motor car engine pump housing lid, cylinder head or cylinder cover, it is made up of above-mentioned extruding pressure casting method.
The technique effect of the present invention:
(1) the extruding pressure casting method of the thin-walled aluminum alloys component (especially motor car engine pump housing lid, cylinder head or cylinder cover) of the present invention, adopt extruding die casting technique, traditional die casting and the respective advantageous feature of extruding die casting are gathered, optimize melting and the processing parameter of extruding die casting so that the complex thin-wall motor car engine pump housing lid manufactured and become has better resistance to air loss. Therefore, the method can improve more than conforming product rate to 95% (conforming product rate of traditional technology is 40%), it is achieved the low consumption of resource and the energy, impels the raising of economic benefit;
(2) the extruding die casting of the present invention is to solve common die casting and the main problem of conventional extruded casting (liquid forging) two technology existence, the advantage having gathered two techniques puts forward, also it is exactly mend product with end extrusion process contracting after being equivalent to the quick injection molding of high speed and high pressure parameter of common die casting on extrusion casting apparatus, there is good market and economic worth;
(3) technology characteristics of the extruding die casting of the present invention is: common die-castingmold filling, extrusion casting feeding. It is by increasing extruding feeding technology after die-castingmold filling, to solve resistance to air loss (mainly shrinkage cavity and the shrinkage porosite) quality problems that tradition die casting generally exists, eliminates various shrinkability defect. Also can say it is on Squeezing die casting machine, realize the shaping technology of complex thin-walled member;
(4) the extruding pressure casting method of the present invention is adopted to make motor car engine pump housing lid, cylinder head, or the technique effect of cylinder cover is: 1), resistance to air loss qualification rate: supplied the supplier of like product to have three to main frame factory at present, wherein Yangzhou, Jiangsu * * company air-leakage test is disposable is 80%-85% by qualification rate, Shiyan, Hubei * * company qualification rate is 85%-90%, they are and adopt 1250T tradition pressure die-casting machine to coordinate vacuum die casting technical matters to produce, and the disposable qualification rate of air-leakage test remains between 97%-99% after our company adopts this inventive technique technique. 2), air-leakage test spillage: the leak judgement standard of this product is��3ml/min by main frame factory, and the salable product of first two are generally between 2.0-3.0, and our company's Product checking numerical value is generally between 0.5-1.5. so, if to requiring stricter high pressure resistance to air loss product, this technical products quality-advantage is just more obvious.
Accompanying drawing explanation
Below in conjunction with specific embodiment, the present invention is described in further detail:
Fig. 1 is the flaw detection photo of the product of tradition die casting explained hereafter, and it exists a large amount of pore and loosens;
Fig. 2 is another flaw detection photo of the product of tradition die casting explained hereafter, and it exists a large amount of pore and loosens
Fig. 3 is another flaw detection photo of the product of tradition die casting explained hereafter, and it exists a large amount of pore and loosens;
Fig. 4 is another flaw detection photo of the product of tradition die casting explained hereafter, and it exists a large amount of pore and loosens;
Fig. 5 is the flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens;
Fig. 6 is another flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens;
Fig. 7 is another flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens;
Fig. 8 is another flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens;
Fig. 9 is another flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens;
Figure 10 is another flaw detection photo of the product adopting the extruding pressure casting method of the present invention to produce, and it is without obvious pore and loosens.
Embodiment
Foundry goods produced by embodiment 1(1250T bedroom extrusion machine)
The extruding pressure casting method of the thin-wall aluminum alloy motor car engine pump housing lid of the present embodiment, comprising: following steps:
1) material composition: the weight percent of aluminum alloy materials component is: 9.6-12%Si, 1.5-3.5%Cu, Mg��0.3%, Mn��0.5, Fe��1.3%, Zn��1%, Ni��0.5%, Sn��0.3%, Pb��0.3, Ti��0.2, all the other are Al.
2) melting: aluminum alloy materials is rendered in crucible oven, aluminium liquid solvent temperature is made to reach 720 DEG C-750 DEG C, every stove throws in a degasifier and 300 grams of deslagging agents, after 10 minutes, refining completes, control soup temperature and remain on 720 DEG C-750 DEG C, running is to holding furnace, and control temperature of aluminum liquid is at 670 DEG C-680 DEG C. (as the scheme of a kind of modification, melting: aluminum alloy materials virgin material and old material are rendered in crucible oven by 50%:50%, aluminium liquid solvent temperature is made to reach 720 DEG C-750 DEG C, every stove throws in a degasifier and 300 grams of deslagging agents, after 10 minutes, refining completes, controlling soup temperature and remain on 720 DEG C-750 DEG C, running is to holding furnace, and control temperature of aluminum liquid is at 670 DEG C-680 DEG C. )
3) mould is prepared: be fixed on extrusion casting machine by mould, first by barrel preheating 3 times (with aluminium liquid 670-690 DEG C, send into barrel, 30-60s after coagulation, sends into aluminium liquid again after manually ejecting), open water coolant, mould is made to reach thermal equilibrium 150-180 DEG C, evenly spraying last layer releasing agent after each depanning in mold cavity, releasing agent thinning ratio is 1:80, and the thickness of release agent coating is 20-25 micron. The described releasing agent trade mark is China wild 935.
4) die casting is extruded: employing is quantitatively watered cup and carried aluminum alloy melt from holding furnace to charging barrel of die casting machine room, Squeezing die casting machine drift steadily advances alloy liquid to mold cavity, hereafter moulding process mainly divides the three phases of three friction-motion speeds: 1, expects that the rear alloy liquid of cylinder air escape enters at a slow speed die cavity stage casing, 2, fast injection and makes product fill type, 3, at a slow speed pressurize compacting crystallization completely, and adds local ftercompction after postponing the 5-8 second. Namely under the parameter setting entering chamber-fast charging type-slow extruding+ftercompction slowly, complete the omnidistance press casting procedure of 700mm. Adjustment Squeeze Casting Parameters on Microstructure is: squeeze pressure is 25-26MPa, and drift extrusion speed is sectional-regulated, first paragraph, slowly advances with the speed (being extruding die casting speed) of 300-400mm/s and accounts for omnidistance 55%, allows air escape and minimizing wrap up in gas; 2nd section, with the speed (being the die casting speed of horizontal plunger die casting machine) of 2000mm/s, advancing and account for omnidistance 38%, rapid shaping is to solve cold shut; 3rd section, with the low speed of 200mm/s, advance remaining section, the compacting crystal grain with pressurize feeding; Pressurized is implemented after postponing 5s, is mainly the feeding of cast gate high-temperature zone. Complete the castingprocesses of thin-wall aluminum alloy motor car engine pump housing lid like this, obtain the spray of dense structure.
The parameter of above-mentioned foundry goods produced by 1250T bedroom extrusion machine
Embodiment 2
On the basis of embodiment 1, the present embodiment has following modification:
Material composition: Si6.5-8.5%, Cu1.5-2.0%, Mn0.1-0.4%, Mg0.8-1.2%, Zn < 0.1, Ti0.1-0.35%, all the other be aluminium.
Embodiment 3
On the basis of embodiment 1, the present embodiment has following modification:
Material composition: 6-8%Al, 0.17-0.4%Mn, 0.45-0.9%Zn, 0.8-1.2%RE, 1.5-2.5%Ti, Si < 0.05%, Cu < 0.025, Ni < 0.001%, Fe < 0.004%, all the other are Mg.
The extruding pressure casting method of cylinder cover of automobile engine or cylinder cover, implements mode with above-mentioned 3 identical.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without the need to also cannot all enforcement modes be given exhaustive. And the apparent change that these spirit belonging to the present invention are extended out or variation are still among protection scope of the present invention.

Claims (5)

1. an extruding pressure casting method for thin-walled aluminum alloys component, comprises the step of extruding die casting; It is characterized in that the step of this extruding die casting comprises: employing is quantitatively watered cup and carried aluminum alloy melt from holding furnace to charging barrel of die casting machine room, and Squeezing die casting machine drift steadily advances aluminum alloy melt to mold cavity, and the process of this propelling aluminum alloy melt comprises three phases successively:
First stage: drift advances (being extruding die casting speed) with the speed of 300-400mm/s, and propelling stroke accounts for omnidistance 50-60%, so that material cylinder air is escaped, alloy liquid enters at a slow speed die cavity stage casing, air escape and minimizing is allowed to wrap up in gas;
Subordinate phase: drift advances to be greater than the speed of 1000mm/s, and propelling stroke accounts for omnidistance 33-43%, makes product fill type completely with quick injection, by rapid shaping to solve cold shut;
Phase III: drift is with section more than the low-speed propulsion of 200mm/s, and the compacting crystal grain with pressurize feeding, obtains spray;
After completing the described phase III, postpone the 5-8 second, then in the ftercompction of cast gate place, it is the feeding of cast gate high-temperature zone.
2. extrude pressure casting method as claimed in claim 1, it is characterised in that: advancing in the process of aluminum alloy melt, Squeeze Casting Parameters on Microstructure is: squeeze pressure is 20-30MPa, dwell time 15-20s.
3. extrude pressure casting method as claimed in claim 2, it is characterised in that: described squeeze pressure is 25-26MPa, dwell time 17s.
4. an extruding pressure casting method for thin-wall aluminum alloy motor car engine pump housing lid, cylinder head or cylinder cover, it comprises the step of extruding die casting as claimed in claim 1.
5. thin-wall aluminum alloy motor car engine pump housing lid, cylinder head or a cylinder cover, it is made by extruding pressure casting method as claimed in claim 1.
CN201310391347.9A 2013-08-30 2013-08-30 The extruding pressure casting method of a kind of thin-wall aluminum alloy motor car engine pump housing lid Active CN104384471B (en)

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CN105081261A (en) * 2015-09-14 2015-11-25 苏州金澄精密铸造有限公司 Pressure casting method for aluminum alloy casting
CN105149541B (en) * 2015-09-21 2016-12-14 珠海市润星泰电器有限公司 For the technique extruding Die Casting
CN106244870B (en) * 2016-08-31 2018-03-09 宁波环亚机械制造有限公司 A kind of production technology of automobile diecast parts
CN106312007A (en) * 2016-08-31 2017-01-11 铝冠精密机械科技(苏州)有限公司 Aluminum alloy pressure casting technology for automobile sheet
CN106329858B (en) * 2016-09-27 2019-10-22 惠州市威盛工业有限公司 A kind of new-energy automobile water cooling motor housing manufacturing process and its structure
CN111575545A (en) * 2020-05-30 2020-08-25 苏州慧金新材料科技有限公司 High-strength die-casting alloy material for mobile phone middle plate and preparation method and application thereof

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Effective date of registration: 20190722

Address after: 212300 Lingkou Town Industrial Park, Danyang City, Zhenjiang City, Jiangsu Province

Patentee after: Jiangsu Huasheng Electric Technology Co., Ltd.

Address before: 212300 Jiangsu Huasheng Electric Technology Co., Ltd., Danyang, Zhenjiang, Jiangsu

Patentee before: Shu Ronghui