CN101927329A - Vacuum high-pressure casting method - Google Patents
Vacuum high-pressure casting method Download PDFInfo
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- CN101927329A CN101927329A CN 201010272781 CN201010272781A CN101927329A CN 101927329 A CN101927329 A CN 101927329A CN 201010272781 CN201010272781 CN 201010272781 CN 201010272781 A CN201010272781 A CN 201010272781A CN 101927329 A CN101927329 A CN 101927329A
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Abstract
The invention relates to a vacuum high-pressure casting process method for a wheel disc casting. The method comprises the following steps of: after melt casting is finished, sequentially and centripetally filling a model from a wheel flange to a wheel center through a broken ring-shaped runner and a tangential ingate with the assistance of vacuum; and after model filling is finished, jointly pressurizing by a pressure head and a pressure filling head which is positioned on an epitaxial slag ladle of the wheel center and maintaining the pressure till a casting is fully solidified to obtain a high-quality wheel disc casting which has the advantages of high-quality wheel flange model filling and no solidification contraction and blowhole defect on a wheel flange hot spot and a wheel center hot spot.
Description
Technical field
The present invention relates to a kind of vacuum high-pressure casting process of producing the wheel disc class foundry goods (as motorcycle and electric boosted wheel hub, belt pulley, gear etc.) that thermal center is scattered in wheel rim and core wheel.
Technical background
Traditional wheel disc class foundry goods, particularly wheel hub, belt pulley etc. all adopt metal mold gravity casting, have problems such as the melt recovery rate is low, production efficiency is low, yield rate is low.In order to adapt to requirements of mass production, improve recovery rate, production efficiency and yield rate, a large amount of light-alloy wheel disc class foundry goods begins to adopt high-pressure casting production at present.
At present, all adopt center pouring technology (seeing accompanying drawing 1) during the high-pressure casting of wheel disc class foundry goods.Because such foundry goods thermal center is distributed in wheel rim and takes turns in the heart, when type die casting is filled at the center, pressure head can only provide effective feeding for the core wheel thermal center, and be distributed on the wheel rim thermal center because of thin-walled spoke or disc early frozen plug feeding passage solidification shrinkage defectives such as shrinkage cavity is loose appear, significantly reduced the technological quality and the mechanical performance at these positions.
In addition, wheel rim is the region of high stress of wheel disk-like accessory, and it is the highest to require to fill the type quality.But pouring technology last filling wheel rim in center causes forming defects such as oxidizing slag, cold shut, current mark to be concentrated and appears on the wheel rim, has reduced the technological quality and the mechanical performance of foundry goods.
In order to improve the military service performance, after part wheel disc class foundry goods is wished casting, promote the bulk material mechanical performance by heat treatment.At this moment, require foundry goods at the vacuum lower charging type, but to obtain the Technology for Heating Processing performance.
Summary of the invention
The purpose of the method for the present invention is that provide a kind of melt fill the type order rationally, can be simultaneously to the die-casting process method of wheel rim and core wheel feeding, the heat treatable wheel disc class foundry goods that can on widely used horizontal plunger die casting machine, implement.
For achieving the above object, technical scheme of the present invention is: alloy melt (4) quantitatively injects pressure chamber (2) by sprue gate (1), pressure head (3) moves ahead and vacuumizes after sealing sprue gate (1) constitutes near closed hollow ring; In the cavity filling process, pressure head (3) vacuum of finishing wheel rim, spoke or disc, core wheel successively that continues to move ahead is filled type, and finishes to vacuumize before filling type and finishing; After filling type and finishing, pressure head (3) is with ftercompction head (6) pressurization and pressurize, makes that melt (4) solidifies under pressure in the die cavity.
In the vacuum pressing and casting process, pressure head (3) experience is filled type, pressurization and pressurize and is solidified three phases; After pressure head (3) moves ahead sealing sprue gate (1), begin die cavity is vacuumized, and before filling type and finishing, finish to vacuumize; After filling type and finishing, pressure head (3) and ftercompction head (6) pressurize and pressurize together, in the consecutive solidification of die cavity melt (4), make the thermal center that is distributed in spoke or disc two ends all obtain good feeding according to first spoke or disc, rear rim and core wheel, eliminate the solidification shrinkage defective of these heat energy-saving positions, as shrinkage porosite, shrinkage cavity etc.
The inventive method has following effect:
1, adopt vacuum aided, the formation of pore has improved the processing quality of wheel disc class foundry goods, and can promote performance by heat treatment in oxidation when having avoided alloy melt (4) flowing forming and the foundry goods;
2, adopt annularly flow to fill type, make the first wheel rim of melt (4), again spoke or disc, the order of core wheel, last slag trap is filled type again, on the high wheel rim of performance requirement, obtain technological quality high and consistent fill the type quality;
3, adopt pressure head (3) and ftercompction head (6) respectively to wheel rim and core wheel pressurization and pressurize, realize the consecutive solidification of first spoke or disc, rear rim and core wheel, thereby be that spoke (dish) thickness, the raising stock utilization that further reduces the wheel disc foundry goods creates conditions;
4, adopt pressure head (3) and ftercompction head (6) the also mode of pressurize of pressurizeing together, make the melt (4) that is distributed in the thermal center of spoke two ends all obtain good feeding when solidifying, eliminated the shrinkage cavity rarefaction defect that these positions are easy to occur, guaranteed that foundry goods is fine and close consistent with technological quality;
5, this technology is applicable to widely used horizontal plunger die casting machine.
Description of drawings
Accompanying drawing is the inventive method operation principle schematic diagram: wherein:
Fig. 1 is a metal mold compression casting schematic diagram;
Fig. 2 is the Vacuum Die Casting Mould schematic diagram;
Fig. 3 is the wheel hub drawing of rough casting;
Fig. 4 fills the type precedence diagram for wheel hub evacuated die-casting process;
Fig. 5 solidifies precedence diagram for wheel hub evacuated die-casting process.
Wherein: the 1-sprue gate; 2-presses the chamber; The 3-pressure head; The 4-alloy melt; The 5-cross gate; 6-ftercompction head; The 7-slag trap; 8-ingate 1; 9-ingate 2; 10-ingate 3; 11-spoke top; 12-spoke root.
The specific embodiment
Be described further below in conjunction with drawings and Examples:
Embodiment is an example with the vacuum die casting process of hub of motorcycle.This process using vertical-parting, the tangential vacuum of annular are filled type, center ftercompction mode, and its technical process is:
1, vacuum high-pressure fills type: alloy melt (4) quantitatively injects pressure chamber (2) by sprue gate (1), extrusion head (3) moves ahead and vacuumizes after sealing sprue gate (1) constitutes near closed hollow ring; Pressure head (3) continues to move ahead and finishes the type that fills of wheel rim, spoke and core wheel successively, and finishes to vacuumize before filling type and finishing; Cavity filling process is seen Fig. 4.
2, compression solidification: after filling type and finishing, pressure head (3) solidifies die cavity alloy melt (4) with ftercompction head (6) pressurization and pressurize under pressure; Process of setting is seen Fig. 5.
3, die sinking pickup: the hub of motorcycle casting solidification also stays mould die sinking after a period of time, and pressure head in the time of die sinking (3) and ftercompction head (6) move ahead, and eject stub bar and motor vehicle wheel hub casts, then pressure head (3) and ftercompction head (6) backhaul station to the die casting respectively;
4, level mould, swabbing, matched moulds, hub of motorcycle vacuum aided extrusion process enters next circulation.
The light-alloy wheel disc class foundry goods that adopts the inventive method to produce magnesium, Al-alloy motorcycle wheel hub and have similar thermal center distribution characteristics can solve easily oxidation in the melt cavity filling process effectively, is easy to produce pore, feeding bad, thin disc hub of motorcycle in spoke two ends is difficult to, horizontal plunger die casting machine low with existing casting method production, spoke material utilization rate and can not produces problems such as hub of motorcycle.
Claims (3)
1. the vacuum high-pressure casting implementation of processes method of wheel disc class foundry goods is: preheating casting mold, swabbing → matched moulds → melt cast → pressure head move ahead to seal and press the chamber cast gate → type that vacuumizes → fill also to finish to vacuumize → margin and center while compression solidification → die sinking → taking-up foundry goods.It is characterized in that: alloy melt (4) quantitatively injects pressure chamber (2) by sprue gate (1), pressure head (3) moves ahead and vacuumizes after sealing sprue gate (1) constitutes near closed hollow ring; Pressure head (3) continues to move ahead and finishes wheel disc outer rim, wheel disc spoke or disc successively, and the order of last core wheel is entad filled type, and stops vacuumizing before filling the type end; After filling type and finishing, pressure head (3) is with center ftercompction head (6) pressurization and pressurize, and the melt in die cavity (4) solidifies under pressure fully.
2. a kind of vacuum high-pressure casting method according to claim 1, it is characterized in that: cross gate (7) is to be positioned at the outer abscission ring structure of wheel rim, ingate tangentially is opened between wheel rim and the cross gate, the position of ingate, size guarantee alloy melt (4) wheel rim of rotation filling earlier under the ordering about of pressure head (3), and then while each spoke of filling or disc, come together in the slag trap of core wheel extension behind the last filling core wheel, realize first wheel rim, again spoke or disc, the order of core wheel, last slag trap is filled type again.
3. vacuum high-pressure casting method according to claim 1, it is characterized in that: after filling type and finishing, pressure head (3) and be positioned at the common pressurization of ftercompction head (6) and the pressurize on core wheel slag trap top, melt (4) on the thermal center that is distributed in wheel rim and core wheel is solidified under pressure, and obtaining wheel rim and core wheel does not all have solidification shrinkage defective (as: shrinkage cavity, loose etc.), integral body not to have the sound casting of pore.
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CN2010102727811A CN101927329B (en) | 2010-09-06 | 2010-09-06 | Vacuum high-pressure casting method |
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CN2010102727811A CN101927329B (en) | 2010-09-06 | 2010-09-06 | Vacuum high-pressure casting method |
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CN101927329A true CN101927329A (en) | 2010-12-29 |
CN101927329B CN101927329B (en) | 2012-05-30 |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102728814A (en) * | 2012-07-20 | 2012-10-17 | 淄博金圣铝业有限公司 | Vacuum high-pressure casting method for fuel injection pump housing of diesel engine |
CN102744375A (en) * | 2012-07-23 | 2012-10-24 | 济南中森机械制造有限公司 | Method for casting and producing automobile cast-steel hubs by using V method |
CN103212687A (en) * | 2012-01-19 | 2013-07-24 | 香港生产力促进局 | Casting device and casting method for wheel disc workpieces |
CN104841906A (en) * | 2015-06-05 | 2015-08-19 | 芜湖舜富压铸制造有限公司 | Vacuum die casting system and vacuumizing method thereof |
CN104942238A (en) * | 2015-06-30 | 2015-09-30 | 四川德恩精工科技股份有限公司 | Non-riser non-chill casting method for belt pulley |
CN105057633A (en) * | 2015-07-20 | 2015-11-18 | 广东科达洁能股份有限公司 | Quantitive molten metal vacuum scooping device |
CN105290726A (en) * | 2015-10-16 | 2016-02-03 | 江苏新创雄铝制品有限公司 | Manufacturing method of spoke of composite aluminum alloy hub |
CN105598418A (en) * | 2016-03-08 | 2016-05-25 | 北京航空航天大学 | Method for maintaining pressures and then quickly boosting pressures for metal low-pressure casting molding of aluminum alloy automobile chassis castings |
CN105618710A (en) * | 2016-03-08 | 2016-06-01 | 北京航空航天大学 | Fast pressurization method after pressure maintaining used for metal-mold low-pressure casting and forming of aluminum alloy wheel |
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 |
CN110871267A (en) * | 2018-08-29 | 2020-03-10 | 惠州比亚迪电子有限公司 | Secondary die-casting metal product with improved appearance defects, preparation method of secondary die-casting metal product, mobile phone middle frame and mobile phone |
CN113084119A (en) * | 2021-03-29 | 2021-07-09 | 哈尔滨工业大学 | Light alloy vacuum high-pressure casting flexible loading casting-forging composite forming device and using method thereof |
CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
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2010
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CN1176859A (en) * | 1996-06-28 | 1998-03-25 | 林煜昆 | Method and equipment for high pressure casting of light alloy hub |
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Cited By (19)
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CN103212687A (en) * | 2012-01-19 | 2013-07-24 | 香港生产力促进局 | Casting device and casting method for wheel disc workpieces |
CN102728814A (en) * | 2012-07-20 | 2012-10-17 | 淄博金圣铝业有限公司 | Vacuum high-pressure casting method for fuel injection pump housing of diesel engine |
CN102744375A (en) * | 2012-07-23 | 2012-10-24 | 济南中森机械制造有限公司 | Method for casting and producing automobile cast-steel hubs by using V method |
CN104841906A (en) * | 2015-06-05 | 2015-08-19 | 芜湖舜富压铸制造有限公司 | Vacuum die casting system and vacuumizing method thereof |
CN104942238A (en) * | 2015-06-30 | 2015-09-30 | 四川德恩精工科技股份有限公司 | Non-riser non-chill casting method for belt pulley |
CN104942238B (en) * | 2015-06-30 | 2017-02-01 | 四川德恩精工科技股份有限公司 | Non-riser non-chill casting method for belt pulley |
CN105057633A (en) * | 2015-07-20 | 2015-11-18 | 广东科达洁能股份有限公司 | Quantitive molten metal vacuum scooping device |
CN105290726A (en) * | 2015-10-16 | 2016-02-03 | 江苏新创雄铝制品有限公司 | Manufacturing method of spoke of composite aluminum alloy hub |
CN105618710A (en) * | 2016-03-08 | 2016-06-01 | 北京航空航天大学 | Fast pressurization method after pressure maintaining used for metal-mold low-pressure casting and forming of aluminum alloy wheel |
CN105598418A (en) * | 2016-03-08 | 2016-05-25 | 北京航空航天大学 | Method for maintaining pressures and then quickly boosting pressures for metal low-pressure casting molding of aluminum alloy automobile chassis castings |
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 |
CN106583683B (en) * | 2016-12-28 | 2019-04-26 | 宁波臻至机械模具有限公司 | A kind of two-position pressurization compression mod |
CN110871267A (en) * | 2018-08-29 | 2020-03-10 | 惠州比亚迪电子有限公司 | Secondary die-casting metal product with improved appearance defects, preparation method of secondary die-casting metal product, mobile phone middle frame and mobile phone |
CN113084119A (en) * | 2021-03-29 | 2021-07-09 | 哈尔滨工业大学 | Light alloy vacuum high-pressure casting flexible loading casting-forging composite forming device and using method thereof |
CN113084119B (en) * | 2021-03-29 | 2022-05-06 | 哈尔滨工业大学 | Use method of light alloy vacuum high-pressure casting flexible loading casting-forging composite forming device |
CN113369461A (en) * | 2021-06-29 | 2021-09-10 | 广东鸿图南通压铸有限公司 | High-vacuum processing technology for aluminum alloy die casting |
CN113369461B (en) * | 2021-06-29 | 2023-09-26 | 广东鸿图南通压铸有限公司 | Processing technology for aluminum alloy die casting high vacuum |
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