CN203526515U - Die for starter shell aluminum alloy liquid forging - Google Patents
Die for starter shell aluminum alloy liquid forging Download PDFInfo
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- CN203526515U CN203526515U CN201320526063.1U CN201320526063U CN203526515U CN 203526515 U CN203526515 U CN 203526515U CN 201320526063 U CN201320526063 U CN 201320526063U CN 203526515 U CN203526515 U CN 203526515U
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Abstract
The utility model relates to a die for starter shell aluminum alloy liquid forging. The die is characterized in that the die is composed of an upper die connecting plate, upper die legs, an upper die plate, an upper die core, a bottom die core, a loose core, a bottom die plate, a top plate, die legs, an oil cylinder, an electromagnetic stroke switch, a punch pin, a cavity and the like. The die has the advantages of being good in heat preservation performance and good in formability property, allowing a workpiece to be conveniently taken, and being capable of simplifying the blank manufacturing technological process of a shell of a starter, reducing cost and improving production efficiency, and capable of effectively improving the micro-structure state of the shell of the starter and improving the comprehensive mechanical property.
Description
Technical field
What the present invention relates to is a kind of aluminium alloy liquid-state forging die, and particularly a kind of mould for the liquid forging of starter shell aluminium alloy belongs to the technical field of machining.
Background technology
The auto manufacturing of developed countries considers the problems such as car load lightweight, road worthiness, environmental protection, processing cost, to automobile starter shell, adopts aluminum alloy materials to make.But because the mechanical performance index of the automobile starter shell of traditional aluminium alloy compression casting or gravitational casting can not adapt to domestic condition of road surface requirement.So domestic automobile industry manufacturer changes automobile starter sheathing material into spheroidal graphite cast-iron by aluminium alloy since the sixties, use sand casting to manufacture starter shell.Thereafter the starter outer cover intensity of manufacturing can meet domestic road conditions needs.But the starter single-piece weight of making is greater than 4000 grams, compared with 1008 kilograms of aluminum alloy material single-piece weight, increase nearly 4 times of total amount, can not adapt to current automotive light weight technology requirement.And because nodular iron casting sand casting running gate system need to retain the mouth of a river, rising head, need to retain larger allowance, exist stock utilization low, the workload of follow-up machining is large, production cost is high,, also there is the problems such as energy consumption is higher, contaminated environment in the problems such as economy is poor simultaneously.
Liquid forging is a kind of technique between liquid condition shaping and formed solid, liquid forging process is that the liquid metal to pouring in mould imposes higher mechanical pressure, when it is solidified, eliminate casting flaw and produce certain plastic deformation, thus a kind of method of acquisition high-quality product.Liquid forging technology is not only applicable to the thick-walled parts such as axisymmetric solid parts, cup shell, through hole part and major axis class, is applicable to non-axial symmetry, even, the complex-shaped part of wall unevenness yet.For some thin-walled parts, also can obtain good forming quality with liquid forging.It has concentrated the advantage of these two kinds of techniques, combines toughness, formability, electrical and thermal conductivity of metal etc., and its intensity, rigidity, hardness, the performance indications such as heat-resisting, wear-resisting, anti-corrosion are all better than the nodular iron casting of sand casting.
But adopting the special-shaped product tools such as liquid forging processing starter shell to acquire a certain degree of difficulty, is mainly that part wall is thin, and the concavo-convex abnormity of body is irregular, is shaped to be difficult for being full of, and also there is no solution preferably in prior art.
Summary of the invention
The applicant, for above-mentioned problem, is studied improvement, and a kind of liquid-state forging die of whole starter aluminum alloy casing is provided, when guaranteeing aluminum alloy casing mechanical performance, improve stock utilization, reduce the follow-up machining amount of wanting that adds, cut down finished cost.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A liquid-state forging die for whole starter aluminum alloy casing, by patrix connecting plate, patrix leg, cope match-plate pattern, upper mold core, bed die core, loose core, 13 parts such as end template, top board, mould leg, oil cylinder, solenoid travel switch, drift, cavity form.Particularly comprise patrix and bed die, upper mold core ring set is on plug and be fixedly mounted on cope match-plate pattern, and upper mold core and bed die in-core are provided with cooling chamber; Bed die body and the bed die core of bed die nest together and are fixedly mounted on bottom plate.The central authorities of upper mould connecting plate are provided with oil cylinder, and each several part mould connects by oil cylinder, and the stroke of oil cylinder is controlled by electromagnetic proximity switch.
Further:
Described die body is two half modules of splitting.While being pressed into bed die core (punch) liquid metal reverse extrusion unbalance stress due to upper mold core (die), can cause heavy wall place to produce the defects such as cold shut, volume sbrinkage blowhole, in order to reduce these defects, adopt upper mold core (die) to lower mold core (punch) direct weighting.Stressed evenly in order to control punch-die extruding, on mould tranverse connecting plate central authorities dress stomach oil cylinder, oil cylinder lower end is drift, uses travel switch to control oil cylinder drift, for adjusting bolster core at aluminum alloy melt morphotype forging process uniform stressed.Patrix connecting plate bottom arranges certain cavity, is convenient to liquid metal thermal biography speed and keeps equating with setting rate.Press device six oil cylinders, control respectively the top board of mould top and the bottom and the locking of surrounding of loosing core, can realize automatic die assembly.Aluminium liquid injects after mould; press " descending " switch; patrix Automatic-descending; go downwards to (upper hydraulic jack shows 7-8 MPas) after the travel position of regulation; upper mold core and bed die core are closed; start by the oil cylinder drift of mold connecting plate device, upper mold core to be pressurizeed; pressurize a period of time (50s-60s), after liquid forging cooling and shaping, press " work " key; first open left and right latch segment; mould piece before and after opening again, patrix backhaul is up to a location stomach, and counterdie is ejected to blank; upper cylinder backhaul, takes off foundry goods.Carry out next cycle circulation.
Technique effect of the present invention is:
The liquid-state forging die of a kind of whole starter aluminum alloy casing disclosed by the invention, not only can make the mechanical performance of starter aluminum alloy casing suitable with the starter aluminum alloy casing mechanical performance of die forging, and raising stock utilization, and can reduce widely the machining amount of following process, cut down finished cost, the starter aluminum alloy casing of simultaneously producing is lightweight, and quality is good, and economy is better.The aluminium alloy starter shell property indices that uses liquid forging process to make at present meets or is better than national standard; The Split type structure of plug and upper mold core and bed die body and bed die core, is convenient to reparation and the replacing of mould, has improved die life, reduces maintenance cost simultaneously.
Meanwhile, the invention provides mould and the combined shaping method of a kind of starter shell aluminium alloy liquid forging, that is, liquid forging is that the aluminium alloy of fusing is injected after mould press starts, and makes under pressure aluminium alloy solidify in forming process.The mode of injecting mould by aluminium alloy is divided into upper pressure type and bottom pouring type.This process using top pouring type is shaped.Its advantage is good heat insulation, formability can be wicked, and pickup is convenient, utilizes the oil cylinder on press that workpiece is ejected.
Particularly, comprise melting → liquid forging → homogenising → ausrolling → heat treatment → finishing;
Described melting is: Al alloy block before entering stove is cleaned out table, with resistance furnace, heat, fire box temperature is controlled at 840 ℃, before melting aluminum alloy, the first preheating of crucible is 600～700 ℃, and insulation 30min, is cooled to 300 ℃, spray paint, be warmed up to 500～600 ℃ of chargings, refining after aluminum alloy melting, degasification, take the scum silica frost of liquid level off again;
Described liquid forging is: after liquid-state forging die is fixed on indirect extrusion casting machine, the aluminium alloy solution quantitative pouring that melting is obtained is in the liquid-state forging die described in claim 1 or 2, pouring temperature is the above 50-80 ℃ of liquidus temperature, pressing speed is 50-80mm/s, filling time 1-6s, specific pressure is 150-250MPa, and pressurize under this pressure (50s-60s), obtains aluminium alloy base;
Described ausrolling is: when the base temperature of homogenising is 750-850 ℃, adopts on four column hydraulic presses and carry out ausrolling.
Wherein, after liquid-state forging die is fixed on indirect extrusion casting machine, and while being preheated to 100-150 ℃, evenly spray one deck releasing agent in liquid-state forging die die cavity, coating layer thickness 10-20 micron, then continues preheating liquid-state forging die to 200-250 ℃.
Wherein, in described ausrolling, the parameter of four column hydraulic presses is:
Nominal pressure: 3500kN
Backhaul power: 900kN
Hydraulic working pressure: 25Mpa
Slide block range: 1200mm
Under ram speed is fast: 150mm/s
Work: 6～15mm/s
Backhaul: 100mm/s
Slide block open height: 1800mm
Shot sleeve thrust: 1250kN
Shot sleeve pulling force: 1000kN
Shot sleeve stroke: 800mm
Injection speed: 60～150m/s
Cylinder thrust: the 1000kN of loosing core
Cylinder pulling force: the 800kN of loosing core
Cylinder stroke: the 400mm of loosing core
Area of work: front and back: 1400mm
Left and right: 1400mm
Lower cylinder thrust: 1200kN
Lower cylinder pulling force: 1000kN
Lower cylinder stroke: 500mm
Motor general power: 96.2kW
Machine weight: 38500kg
Adopt liquid forging to make base, make aluminium alloy crystallization, shaping produce a small amount of plastic deformation under pressure, obtain dense internal organization, product grain is tiny, the high-quality Melted Metal Squeezing Workpieces of any surface finish.Liquid forging has following process characteristic:
1) liquid forging can be eliminated pore, shrinkage cavity and the defect such as loose of foundry goods inside, produces local plastic deformation, makes foundry goods dense structure;
2) liquid metal, at Forming under Pressure and solidifying, makes foundry goods tight with the laminating of die cavity wall, thereby Melted Metal Squeezing Workpieces has higher surface smoothness and dimensional accuracy, and its rank can reach the level of die casting;
3) Melted Metal Squeezing Workpieces is in process of setting, and each position is in compressive stress state, is conducive to the feeding of foundry goods and prevents the generation of casting crack;
4) liquid forging technology also has the advantages such as technique is simple, foundry goods good mechanical property, production efficiency is high, cost is relatively low.
Accompanying drawing explanation
Fig. 1 is the structural representation of mould in the present invention, wherein 1 patrix connecting plate; 2 patrix legs; 3 cope match-plate patterns; 4 upper mold core; 5 bed die cores; 6 loose core; 7 end templates; 8 top boards; 9 mould legs; 10 oil cylinders; 11 solenoid travel switches; 12 cavitys; 13 drifts.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail
Implement the preparation of 1 mould
As shown in Figure 1, the present invention includes patrix and bed die, patrix comprises cope match-plate pattern, plug and upper mold core, and plug is fixedly mounted on the central authorities of cope match-plate pattern, and upper mold core ring set is on plug and be fixedly mounted on cope match-plate pattern.Bed die comprises end template and bed die core, and end template and bed die core nest together and fixedly mount, and patrix connecting plate central authorities are provided with oil cylinder, and each several part mould connects by oil cylinder, and the stroke of oil cylinder is controlled by nearly switch by electromagnetism.By equipment " automatically " matched moulds, the aluminium alloy solution that melting is obtained dips quantitative aluminium water with quantifying spoon and is poured in liquid-state forging die, then press " descending " key, patrix Automatic-descending, go downwards to (upper hydraulic jack pressure indication 7-8 MPas) after the stomach of stroke position, upper cylinder is to foundry goods pressurization forging, pouring temperature is the above 50-80 ℃ of liquidus temperature, pressing speed is 50-80mm/s, filling time 1-6s, specific pressure is 150-250MPa, and under this pressure pressurize a period of time (50s-60s), press " work " key, first open left and right latch segment, mould piece before and after opening again, patrix backhaul, when counterdie ejects, upper cylinder backhaul, forging is ejected, this structure can make aluminum alloy casing from bed die, take out smoothly after completing liquid forging.
When reality is used, patrix and bed die are arranged on respectively on upper, the bed die frame of forcing press.Before starting liquid forging, patrix and bed die are heated and release agent spraying, then molten aluminium alloy is quantitatively injected in the die cavity of bed die, patrix declines and matched moulds, in upper cooling chamber, lower cooling chamber, make Water-cooling circulating, adjust mold temperature all the time between 200～250 degrees Celsius, by forcing press, impose static pressure insulation, pressurize until complete the liquid forging of aluminum alloy casing.
Utilize mould of the present invention, not only can make the mechanical performance of aluminum alloy casing suitable with the aluminum alloy casing mechanical performance of die forging, not only can improve stock utilization, and in follow-up processing, can reduce widely machining amount, and cut down finished cost.
The combined shaping method of embodiment 2 starter aluminum alloy casings
The liquid forging rolling combined shaping method of the starter aluminum alloy casing of the present embodiment, comprises melting → liquid forging → homogenising → ausrolling → heat treatment → finishing.The chemical composition of the starter shell aluminium alloy of the present embodiment is in Table 1
Table 1 starter shell al alloy component (in %, the rest is A1)
Adopt the concrete technology step of liquid forging rolling combined shaping method of different section ring parts of this aluminium alloy as follows:
1, melting: tool specific embodiment is: it is before that removing surface is clean that Al alloy block enters stove, with resistance furnace, heat, fire box temperature is controlled at 840 ℃, before melting aluminum alloy, the first preheating of crucible is 600～700 ℃, and insulation 30min, is cooled to 300 ℃, spray paint, be warmed up to 500～600 ℃ of chargings, refining after aluminum alloy melting, degasification, take the scum silica frost of liquid level off again;
2, liquid forging is: after above-mentioned liquid-state forging die is fixed on indirect extrusion casting machine, the aluminium alloy solution quantitative pouring that melting is obtained is in liquid-state forging die, pouring temperature is 970 ℃, pressing speed is 80mm/s, filling time 1s, specific pressure is 200MPa, and under this pressure pressurize 50s-60s,, obtain aluminium alloy base.Specific pressure refers to liquid metal cooling unit pressure of bearing under pressure.Preferably, after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 100～180 ℃, in liquid-state forging die die cavity, evenly spray one deck releasing agent, 18 microns of coating layer thicknesses, continue preheating liquid-state forging die to 250 ℃, spraying releasing agent can facilitate the liquid-state forging die demoulding.Releasing agent is selected finish graphite.
3, evenly turn to: when the base that liquid forging is obtained is cooled to 620 ℃, insulation 3h.
4, ausrolling: after homogenising, the Isothermal Hot operation of rolling is implemented in heating, when the near whole cross section of homogenising ring base is warming up to 850 ℃, adopt on the compound machine for rolling ring of journal axle and carry out ausrolling, the temperature of rolling mold is 850 ℃, and the temperature difference that base is encircled in itself and nearly whole cross section is 0 ℃.Ausrolling comprises successively the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage.
4, heat treatment is: the ring base obtaining through ausrolling is at 350 ℃ of insulation 1h, cooling with stove.
5, finishing: the finishing of the present embodiment adopts cold-finish.
The Performance Ratio of the starter aluminum alloy casing of the present embodiment and the nodular iron casting of traditional sand casting is as shown in table 2, table 3.
The sand casting of table 2 spheroidal graphite cast-iron and the comparison of aluminium alloy liquid forging scheme
The forging part of table 3 the present embodiment is in aspect performance indications such as intensity, rigidity, hardness
Claims (1)
1. an aluminium alloy liquid-state forging die of producing starter shell, is characterized in that: upper mold core ring set is on plug and be fixedly mounted on cope match-plate pattern, is provided with cooling chamber in upper mold core; End template and bed die core nest together and are fixedly mounted on bottom plate, and bed die in-core is provided with lower cooling chamber; Mould each several part connects by oil cylinder, and the stroke of oil cylinder is controlled by electromagnetic proximity switch; In upper mould connecting plate central means oil cylinder, oil cylinder lower end is drift, uses electromagnetic switch to control oil cylinder punch stroke; Adopt upper mold core to bed die core direct weighting; Patrix connecting plate bottom arranges certain cavity, is convenient to liquid metal thermal biography speed and keeps equating with setting rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526063.1U CN203526515U (en) | 2013-08-28 | 2013-08-28 | Die for starter shell aluminum alloy liquid forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320526063.1U CN203526515U (en) | 2013-08-28 | 2013-08-28 | Die for starter shell aluminum alloy liquid forging |
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| Publication Number | Publication Date |
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| CN203526515U true CN203526515U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320526063.1U Expired - Fee Related CN203526515U (en) | 2013-08-28 | 2013-08-28 | Die for starter shell aluminum alloy liquid forging |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209493A (en) * | 2014-09-03 | 2014-12-17 | 西安交通大学 | Electromagnetic core-pulling type semisolid squeeze casting die for rolling bearing retainer |
| CN113000820A (en) * | 2021-03-10 | 2021-06-22 | 昆明理工大学 | Die for semi-solid aluminum alloy extrusion motor shell |
| CN114433770A (en) * | 2021-12-27 | 2022-05-06 | 芜湖三联锻造股份有限公司 | Grain size optimizing device for forging flange parts |
-
2013
- 2013-08-28 CN CN201320526063.1U patent/CN203526515U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209493A (en) * | 2014-09-03 | 2014-12-17 | 西安交通大学 | Electromagnetic core-pulling type semisolid squeeze casting die for rolling bearing retainer |
| CN104209493B (en) * | 2014-09-03 | 2016-05-04 | 西安交通大学 | A kind of Drawing-Core semisolid squeeze casting mould of electromagnetism of rolling bearing retainer |
| CN113000820A (en) * | 2021-03-10 | 2021-06-22 | 昆明理工大学 | Die for semi-solid aluminum alloy extrusion motor shell |
| CN114433770A (en) * | 2021-12-27 | 2022-05-06 | 芜湖三联锻造股份有限公司 | Grain size optimizing device for forging flange parts |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20140828 |
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| EXPY | Termination of patent right or utility model |