CN103658597A

CN103658597A - Aluminium alloy wheel gravity pressing casting method and device

Info

Publication number: CN103658597A
Application number: CN201210328935.3A
Authority: CN
Inventors: 刘宏磊
Original assignee: Qinhuangdao Dicastal Xionglong Wheels Co Ltd
Current assignee: Qinhuangdao Dicastal Xionglong Wheels Co Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2014-03-26

Abstract

The invention relates to an aluminium alloy wheel gravity pressing casting method and device. Particularly, an aluminium alloy wheel having good quality can be efficiently manufactured by gravity casting and solidification under pressure. Meanwhile, the invention relates to an aluminium alloy wheel casting device and mould, and the device and mould are characterized in that production efficiency can be improved, and quality of the aluminium alloy wheel can be improved. According to aluminium alloy wheel gravity pressing casting method and device, central pouring is adopted, and service life of the mould is prolonged. Appropriate pouring temperature and reasonable cooling and pressing measurements are adopted, and feeding of castings is achieved. A filtering screen is arranged on a pouring gate in a pouring process, impurity mixing is effectively prevented, and quality of castings like the aluminium alloy wheel is guaranteed by controlling key process parameters. The aluminium alloy wheel gravity pressing casting method takes advantages of metal type gravity casting and low-pressure casting of the aluminium alloy wheel, overcomes the defects in metal type gravity casting and low-pressure casting, and is a process method combining and optimizing metal type gravity casting and low-pressure casting of the aluminium alloy wheel.

Description

Aluminum-alloy wheel gravity compression casting

Technical field

The present invention relates to a kind of for aluminum-alloy wheel casting method and device, be specifically related to a kind of for the new cast moulding method of aluminum-alloy wheel, concurrent exposed installation meter equipment and mould.

Background technology

At present, lightweight is the trend that wheel foundry goods is constant forever.Development along with science and technology and national economy, all trades and professions all propose new requirements at the higher level to Foundry Production, as high-quality, lightweight, energy-conserving and environment-protective, green are produced, few cutting and nothing cutting, and save material, reduce costs etc., this all aluminium alloy adopt different casting methods, brought favourable development space.The casting of aluminum-alloy wheel industry is no exception, as adopting gravitational casting, adds the hollow high end performance aluminum-alloy wheel of complicated core, utilizes hollow moulding to effectively reduce the weight of wheel; The accurate control of aluminum-alloy wheel low pressure casting filling and solidification processess is carried out to the low pressure casting of thin spoke wheel, utilized process to realize the lightweight of wheel.The exploitation of aluminum-alloy wheel new technology and application meet < < State Council about printing and distributing notice > > (No. [2006] 6, the promulgated by the State Council) spirit of implementing the some supporting policys of < National Program for Medium-to Long-term Scientific and Technological Development (2006-2020) >, the high-technology field > > and the National Development and Reform Committee that belong to the < < state key support of Department of Science and Technology's issue, current industrialization of new high-technology major fields guide (2007 year) the > > scope of first developing of < < of department's issues such as the Department of Science and Technology, so in order to improve China's aluminum-alloy wheel enterprise independent innovation ability, country also supports enterprise's aluminum-alloy wheel to carry out correlative study development activities.

The casting of aluminum-alloy wheel can trace back to the twenties in 20th century the earliest, and some racing drivers in Europe, in order to alleviate car weight, produced aluminum-alloy wheel by the method for sand casting, for sport-racing car at that time.Through having development decades, aluminum-alloy wheel is used widely.Its casting method also has multiple, and with regard to cast aluminum alloy wheel, the manufacture method of abroad reporting for work has: gravitational casting, low pressure casting, TUBE BY LIQUID EXTRUSION, back-pressure casting, centrifugal casting, evacuated die-casting process, semi-solid casting etc.The most general metal mold gravity casting, the low pressure casting of mainly containing of application wherein.Gravitational casting account for 40%; Low pressure casting account for 40%; Additive method accounts for 20%.The research and development of China's aluminum-alloy wheel start from late 1980s, the initial stage nineties.The aluminum-alloy wheel casting method of China mostly decides in conjunction with enterprise self manpower, financial resources, 60% use low pressure casting in aluminum alloy wheel of vehicle, special occasions is useful back-pressure casting (but ratio is few) also, 38% use gravitational casting, the liquid extrusion casting method of Ye You minority high specific pressure (about 100MPa) for enterprise.Also have report, current aluminum-alloy wheel forming technique mainly adopts low-pressure casting process, and units of low-pressure casting automobile aluminium wheel hub accounts for the more than 80% of total amount.Therefore aluminum current alloy wheel is cast both at home and abroad comparatively generally low pressure casting and metal mold gravity casting.Low pressure casting is not generally established separately rising head, and running gate system is little, and aluminium liquid using rate of metal is high, and mechanical castings is good.But the air injection machine that domestic aluminium alloy factory was used in the past be take import as main, due to air injection machine complex structure, need accurately control pressure process by automatic control technology, price is comparatively expensive.Although Ye You enterprise is absorbing on the basis of advanced foreign technology, in conjunction with low pressure casting for many years, put into practice rich experiences, self design New Low Voltage Casting Equipment, its cost is decreased, compare gravity casting equipment, its cost or much high.Metal mold gravity casting, owing to there is no impressed pressure, in order to obtain fine and close foundry goods, need to utilize rising head to carry out feeding.Therefore, compare with low pressure casting, the dead head of metal mold gravity casting is heavier, and aluminium liquid utilization rate is low.

Summary of the invention

The object of the invention is to for the problems referred to above, the present invention utilizes low pressure casting and metal mold gravity casting advantage separately, get its advantage abandon its dross, in conjunction with self aluminum-alloy wheel technology and knowhow for many years, invented the gravity compression casting of aluminum-alloy wheel.

The technical scheme that realizes above-mentioned purpose is: aluminum-alloy wheel under Action of Gravity Field, liquid metals added metal die cavity, liquid metals completes process of setting under pressure and obtains a kind of casting method of foundry goods subsequently.Because it makes lower charging type at gravity, under pressure-acting, solidify, be the casting method that gravity combines with compression casting, the present invention is called " gravity compression casting ".

Technical scheme of the present invention also comprises: the top template of gravity compression casting mould, end template, limit mould, ejecting mechanism are connected with movable mold, base plate, limit mould oil cylinder, the ejecting mechanism connecting plate of gravity compression casting equipment respectively, mould is arranged on equipment.Top on mould, bed die cooling system, pressurized cylinder are connected with the compressed air piping with flow and pressure control device.

After mould and pipeline are installed and connected, limit mould oil cylinder advances limit mould, and movable mold moves down together with backform, and bed die, limit mould, backform surround die cavity.According to casting design weight, aluminium liquid is poured into a mould by mold center, after casting complete, pressurized cylinder pressurizeed by the pressure of technique initialization, speed, spacing and dwell time.After pressurization, by process time and flow, open top, bed die cold gas system, make wheel blanks foundry goods consecutive solidification under pressure.After wheel blanks foundry goods solidifies completely, limit mould oil cylinder is opened limit die drawing, and movable mold is together with moving on backform, and ejecting mechanism ejects wheel blanks foundry goods together with pressurized cylinder, completes a casting circulation.Certainly, this casting process also automatically completes under industrial computer and PLC programme-control.

Accompanying drawing explanation

Fig. 1 is present device front view;

Fig. 2 is mode host visual pattern of the present invention.

The specific embodiment

By reference to the accompanying drawings the specific embodiment of the present invention is described.

As accompanying drawing, the top template of mould of the present invention (Fig. 2) (2), end template (5), limit mould (9), ejecting mechanism (13) are connected with movable mold (7), base plate (12), limit mould oil cylinder (11), the ejecting mechanism connecting plate (8) of equipment of the present invention (Fig. 1) respectively, mould is arranged on equipment.Backform cooling system (1) on mould (Fig. 2), bed die cooling system (4), pressurized cylinder (12) are connected with the compressed air piping with flow and pressure control device.

After mould and pipeline are installed and are connected, equipment (Fig. 1) top mould oil cylinder (11) advances mould (Fig. 2) top mould (9), equipment (Fig. 1) movable mold moves down together with backform, and the upper bed die (6) of mould (Fig. 2), limit mould (9), backform (3) surround die cavity.According to casting design weight, aluminium liquid is poured into a mould by mould (Fig. 2) center running gate system (10), when the upper pressurized cylinder (12) of casting complete rear mold (Fig. 2) pressurizeed by the pressure of technique initialization, speed, spacing and dwell time, pressurizing piston (11) moves down to aluminium liquid and pressurizes.After pressurization, press process time and flow opening mold (Fig. 2) backform cold gas system (1), bed die cold gas system (4), make wheel blanks foundry goods consecutive solidification under pressure.After wheel blanks foundry goods solidifies completely, equipment (Fig. 1) top mould oil cylinder (11) pulls open mould (Fig. 2) top mould (9), the upper movable mold (7) of equipment (Fig. 1) is together with moving on mould (Fig. 2) backform (3), mould (Fig. 2) ejecting mechanism (13) promotes pressurizing piston (11) together with pressurized cylinder (12) wheel blanks foundry goods is ejected, and completes a casting circulation.

Claims

1. the casting method of an aluminium alloy wheel hub, it is characterized in that: equipment (Fig. 1) top mould oil cylinder (11) advances mould (Fig. 2) top mould (9), equipment (Fig. 1) movable mold moves down together with backform, and the upper bed die (6) of mould (Fig. 2), limit mould (9), backform (3) surround die cavity.

2. according to casting design weight, aluminium liquid is poured into a mould by mould (Fig. 2) center running gate system (10), when the upper pressurized cylinder (12) of casting complete rear mold (Fig. 2) pressurizeed by the pressure of technique initialization, speed, spacing and dwell time, pressurizing piston (11) moves down to aluminium liquid and pressurizes.

3. after pressurization, press backform cold gas system (1), the bed die cold gas system (4) of process time and flow opening mold (Fig. 2), make wheel blanks foundry goods consecutive solidification under pressure.

4. after wheel blanks foundry goods solidifies completely, equipment (Fig. 1) top mould oil cylinder (11) pulls open mould (Fig. 2) top mould (9), the upper movable mold (7) of equipment (Fig. 1) is together with moving on mould (Fig. 2) backform (3), mould (Fig. 2) ejecting mechanism (13) promotes pressurizing piston (11) together with pressurized cylinder (12) wheel blanks foundry goods is ejected, and completes a casting circulation.

5. device structure according to claim 1, is characterized in that: (4) four of (2) two of upper plate (1), hydraulic cylinders, hydraulic cylinder installing plate (3), the platen guide pillars, ejecting mechanism oil cylinder (5), equipment upper plate (6), movable mold (7), ejecting mechanism connecting plate (8), guidance panel (9), equipment power post (10) limit mould oil cylinder (11), equipment bay (12), the equipment supporting leg (13) that have in (Fig. 1) form.

6. mould structure according to claim 1, is characterized in that: have (Fig. 2) Zhong center running gate system (10) and pressurized cylinder (12) is set and the pressing mechanism of pressurizing piston (11).