CN102463334A - Mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes - Google Patents
Mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes Download PDFInfo
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- CN102463334A CN102463334A CN2011103990832A CN201110399083A CN102463334A CN 102463334 A CN102463334 A CN 102463334A CN 2011103990832 A CN2011103990832 A CN 2011103990832A CN 201110399083 A CN201110399083 A CN 201110399083A CN 102463334 A CN102463334 A CN 102463334A
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Abstract
The invention relates to a mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes, wherein the cooling-pipe material of the water-cooling device is a red-copper pipe with the inside diameter of 6.0 to 8.0mm, and the copper pipe is bent to be spiral; according to the modeling characteristics of a wheel, spiral U-shaped slots with the depth of 10.0 to 12.0mm, the width of 8.0 to 10.0mm and the quantity of 4 to 6 are milled around a corresponding bottom mould of the shrink head of a product, and the copper pipe which is bent to be spiral is inlaid into the slots; according to the casting characteristics of the wheel, the water-inlet end of the water-cooling device is positioned at one end far away from the shrink head, and the water-outlet end is positioned at one end near the shrink head; according to a casting process, the water-cooling delay time is set as 60 to 120 seconds, the starting time is set as 150 to 200 seconds, and the delay time and the starting time are controlled by a low-pressure casting-machine control system; and when the water-cooling device is switched on, cooling water enters the copper pipe from the water-inlet end and flows out from the water-outlet end, the heat around the bottom mould relative to the shrink head of the wheel is brought away through water circulation to prevent partial atomic hydrogen remaining in molten aluminum from being precipitated in the mode of air bubbles to form the pinholes.
Description
Technical field
The present invention relates to the aluminum alloy wheel of vehicle casting field, specifically, relate to a kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole.
Background technology
In recent years; Along with American-European consumer to aluminum alloy wheel of vehicle surface state variation, beautifulization require increasingly high; The international market is increasing to the aluminum-alloy wheel demand that bright of finish turning, bright border color spray paint etc. has beautiful outward appearance, and this has higher requirement to manufacturing process and product and technology.The output of China's aluminum alloy wheel of vehicle accounts for 55%～60% of world market share at present; The domestic company that nearly 150 tame professional production aluminum alloy wheel of vehicle are arranged; But overall manufacturing technology is located medium level in the world, especially a foundry engieering and a country and significantly gap.Year for international markets such as bright of finish turning, bright border color spray paint dotes on, and higher mechanical property requirements is not only arranged, and the stricter general pin hole of appearance requirement, particularly product surface, the every 1000mm of cinder hole are arranged
2Dispersed pit, pin hole can not be more than 3 places, and the defective diameter can not be greater than 0.2mm, and therefore the production of above product is mainly monopolized in developed country at present.
Pin hole, cinder hole are the common casting flaw of aluminum alloy wheel of vehicle, are example with the pin hole, and the formation of this defective and the melting of aluminum-alloy wheel and casting process are closely related.Why product exists pin hole, is because aluminium liquid contains gas and slag inclusion thing in the casting process on the one hand, and grow and cause slow owing to the casting process cooling velocity on the other hand, casting cycle.The gas in the reduction aluminium alloy and the content of slag inclusion thing, the inner pin hole that produces of prevention foundry goods should be followed " preventing ", " row ", " dissolving " three principles successively.So-called " prevent " is strictly on guard against that promptly steam and various gassiness foul sneak in the aluminium liquid, and maintenance aluminium liquid is farthest pure, and this is relevant with the melting operation; So-called " row " removes oxide inclusion and gas for through slagging-off, refining; So-called " dissolving " promptly realized the rapid solidification of casting process as far as possible, improves cooldown rate, shortens casting cycle, makes the atomic hydrogen solid solution in the aluminium liquid in aluminium casting, not separate out the formation pin hole with macroscopical bubble form.At present; " preventing ", " row's " technology is mature on the whole in the industry; Process control measure for " dissolving " is also few, and effect is also also not obvious, generally is employed in the method that the position that occurs the property separated out pin hole easily adds cooling duct or strengthens compensatory pressure; But effect is not remarkable; Production process repeatability is bad with repeatability, and is more outstanding near the thicker position pin hole of rising head to the poor effect of improving, the especially foundry goods of pin hole; Bright of finish turning, bright border color spray paint are this to seem obvious especially during to the higher aluminum-alloy wheel of appearance requirement to this defective making; Thereby often make the product back of in the surface-treated process, spraying paint bubble and to cause product rejection, the technology that visible further innovation casting process " dissolves " improves cooldown rate, shortening casting cycle; Realize rapid solidification, atomic hydrogen solid solution in the aluminium liquid is not separated out with macroscopical bubble form in aluminium casting form pin hole bright of aluminum-alloy wheel especially finish turning, bright border color spray are painted this aluminum-alloy wheel and have great significance.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art;, low pressure casting process aluminum-alloy wheel increasingly high to the aluminum-alloy wheel appearance requirement is easy to generate the problem of the property separated out pin hole around rising head; Provide a kind of obvious results to reduce needle pore defect method, specifically a kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole.
Realize that above purpose technical scheme is: a kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole, the material of the cooling tube of this water cooling plant is the copper tube of internal diameter 6.0～8.0mm, and copper pipe is converted into helical form; Around the corresponding bed die of product rising head, milling the degree of depth according to the wheel modeling characteristic is that 10.0～12.0mm, width are 8.0～10.0mm, spiral " U " shape groove, and spiral " U " shape groove is the 3-4 circle, will be converted into spiral helicine copper pipe and be inlaid in the groove; Solidify this water cooling plant water inlet end of characteristic at an end far away apart from rising head according to the wheel cast procedural order, the water side is at an end near apart from rising head; Set this water-cooled delay time 60～120 seconds, 150～200 seconds opening times according to casting technique, delay time and opening time are controlled by air injection machine control system; When water cooling plant is connected; Because the copper tube that adopts is better than iron pipe thermal conductivity, adopt the helical form copper pipe to dispel the heat more evenly, adopt water-cooled faster than wind-cooling heat dissipating; And the water cooling plant of band copper tube is arranged on and is easy to generate the rising head peripheral region of separating out shape property pin hole especially; When cooling water flows out from water inlet end entering copper pipe and from the water side, the bed die position is promptly taken away with respect to the heat around the wheel rising head through the water circulation.This device can increase crystallization degree of supercooling when solidifying in casting process, realize the foundry goods rapid solidification, prevent that part of atoms hydrogen residual in the aluminium liquid from separating out the formation pin hole with bubble form.
The present invention innovates from many-sides such as material, structure, technologies; The puzzlement industry shape property pin hole problem of separating out is for many years made substantial progress, make the very high every 1000mm of product surface pin hole, cinder hole of some appearance requirement such as bright of finish turning, bright border color spray paint
2Dispersed no more than 3 places of pit, pin hole; And the defective diameter is less than 0.2mm; Reach developed country's export standard, so this device is a kind of mold bottom die water cooling plant that simple, stable production process, outstanding effect reduce low pressure casting aluminum alloy wheel pin hole of making.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is bed die cutaway view of the present invention and vertical view.
Concrete embodiment
As shown in Figure 1; A kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole comprises backform 1, limit mould 2, bed die 3, " U " shape groove 4, copper pipe 5, on bed die 3, is equivalent to aluminum-alloy wheel rising head position and mills 3 circle " U " shape grooves; Its degree of depth is that 11.0mm, width are 9.0mm; With internal diameter is that the copper pipe of 6.5mm is put into and milled good " U " shape groove, and cooling copper tube is shape in the shape of a spiral, and this water-cooling apparatus is connected with low press control system.Setting this water composite cooling pipe device delay time according to this product casting technique is that 100 seconds, opening time are 180 seconds.
As shown in Figure 2; When cooling device is connected; Cooling water gets into copper pipes from water inlet end 6 and 7 flows out from the water side, through the water circulation heat around the bed die rising head is taken away, thereby the crystallization degree of supercooling when increasing this zone freezing, is realized the foundry goods rapid solidification; Make part of atoms hydrogen residual in the aluminium liquid not separate out the formation pin hole, can find out that from following table this method has a significant effect with bubble form.The casting qualification rate is reached more than 95.0%, and appearance yield obviously improves.
The original method comparison diagram of the present invention and industry
Claims (3)
1. mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole; It is characterized in that this device is made up of backform (1), limit mould (2), bed die (3), " U " shape groove (4), copper pipe (5), water inlet end (6), water side (7); On bed die (3), be equivalent to aluminum-alloy wheel rising head position and mill " U " shape groove, copper pipe is put into milled good " U " shape groove, cooling copper tube is shape in the shape of a spiral; Water-cooling apparatus is connected with low press control system; When cooling device was connected, cooling water got into copper pipe (5) and (7) outflow from the water side from water inlet end (6), through the water circulation bed die is taken away with respect to the heat around the wheel rising head; Thereby realize the foundry goods rapid solidification, make part of atoms hydrogen residual in the aluminium liquid not separate out the formation pin hole with bubble form.
2. a kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole according to claim 1 is characterized in that spiral " U " shape groove depth is that 10.0～12.0mm, width are that 8.0～10.0mm, spiral " U " the shape groove number of turns are the 3-4 circle.
3. a kind of mold bottom die water cooling plant that reduces low pressure casting aluminum alloy wheel pin hole according to claim 1, it is characterized in that: cooling copper tube is shape in the shape of a spiral, can play balanced heat radiation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103990832A CN102463334A (en) | 2011-12-02 | 2011-12-02 | Mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103990832A CN102463334A (en) | 2011-12-02 | 2011-12-02 | Mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes |
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| CN102463334A true CN102463334A (en) | 2012-05-23 |
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| CN2011103990832A Pending CN102463334A (en) | 2011-12-02 | 2011-12-02 | Mould bottom-mould water-cooling device for decreasing low-pressure cast aluminum-alloy wheel pinholes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921931A (en) * | 2012-11-19 | 2013-02-13 | 苏州雅泛迪铝业有限公司 | Bottom die cooling device |
| CN103056336A (en) * | 2013-01-25 | 2013-04-24 | 北京交通大学 | S-shaped spoke plate track wheel blank cast and casting method thereof |
| CN104353810A (en) * | 2014-12-05 | 2015-02-18 | 重庆戴卡捷力轮毂制造有限公司 | Bottom die for water-cooled die casting mold for manufacturing aluminum alloy wheel hub |
| CN106670433A (en) * | 2016-12-28 | 2017-05-17 | 华南理工大学 | Structure of water-cooling channel of casting mold |
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| JPH11226716A (en) * | 1998-02-10 | 1999-08-24 | Nissan Motor Co Ltd | Metallic mold for casting |
| CN201190164Y (en) * | 2008-05-19 | 2009-02-04 | 曲长春 | Composite cooling wall for blast furnace |
| DE102008039457A1 (en) * | 2008-08-25 | 2009-09-17 | Schott Ag | Apparatus for oriented solidification of melts in crucibles, especially production of mono- or multi-crystalline silicon, comprises induction heater mounted on base of crucible or plate which supports it |
| CN101791682A (en) * | 2010-04-08 | 2010-08-04 | 中冶京诚工程技术有限公司 | Manufacturing device for rectangular ingot blank of ultra-large extra-thick plate |
| CN201586739U (en) * | 2009-12-24 | 2010-09-22 | 浙江今飞凯达轮毂有限公司 | Cooling system for low pressure casting mold of automobile hub |
| CN101837442A (en) * | 2010-02-04 | 2010-09-22 | 保定市立中车轮制造有限公司 | Low pressure casting wheel cooling technology |
| CN102029377A (en) * | 2010-12-08 | 2011-04-27 | 何丙军 | Low-pressure casting die of aluminium alloy wheel and casting method thereof |
| CN201979055U (en) * | 2011-03-30 | 2011-09-21 | 金川集团有限公司 | Horizontal continuous ingot casting crystallizer |
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2011
- 2011-12-02 CN CN2011103990832A patent/CN102463334A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11226716A (en) * | 1998-02-10 | 1999-08-24 | Nissan Motor Co Ltd | Metallic mold for casting |
| CN201190164Y (en) * | 2008-05-19 | 2009-02-04 | 曲长春 | Composite cooling wall for blast furnace |
| DE102008039457A1 (en) * | 2008-08-25 | 2009-09-17 | Schott Ag | Apparatus for oriented solidification of melts in crucibles, especially production of mono- or multi-crystalline silicon, comprises induction heater mounted on base of crucible or plate which supports it |
| CN201586739U (en) * | 2009-12-24 | 2010-09-22 | 浙江今飞凯达轮毂有限公司 | Cooling system for low pressure casting mold of automobile hub |
| CN101837442A (en) * | 2010-02-04 | 2010-09-22 | 保定市立中车轮制造有限公司 | Low pressure casting wheel cooling technology |
| CN101791682A (en) * | 2010-04-08 | 2010-08-04 | 中冶京诚工程技术有限公司 | Manufacturing device for rectangular ingot blank of ultra-large extra-thick plate |
| CN102029377A (en) * | 2010-12-08 | 2011-04-27 | 何丙军 | Low-pressure casting die of aluminium alloy wheel and casting method thereof |
| CN201979055U (en) * | 2011-03-30 | 2011-09-21 | 金川集团有限公司 | Horizontal continuous ingot casting crystallizer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921931A (en) * | 2012-11-19 | 2013-02-13 | 苏州雅泛迪铝业有限公司 | Bottom die cooling device |
| CN103056336A (en) * | 2013-01-25 | 2013-04-24 | 北京交通大学 | S-shaped spoke plate track wheel blank cast and casting method thereof |
| CN104353810A (en) * | 2014-12-05 | 2015-02-18 | 重庆戴卡捷力轮毂制造有限公司 | Bottom die for water-cooled die casting mold for manufacturing aluminum alloy wheel hub |
| CN106670433A (en) * | 2016-12-28 | 2017-05-17 | 华南理工大学 | Structure of water-cooling channel of casting mold |
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Application publication date: 20120523 |