CN202726014U

CN202726014U - An aluminum alloy hub side die with a heat dissipation structure

Info

Publication number: CN202726014U
Application number: CN 201120376476
Authority: CN
Inventors: 陈威伸
Original assignee: TAISHAN FUCHENG ALUMINIUM CO Ltd
Current assignee: TAISHAN FUCHENG ALUMINIUM CO Ltd
Priority date: 2011-09-29
Filing date: 2011-09-29
Publication date: 2013-02-13
Anticipated expiration: 2021-09-29

Abstract

An aluminum alloy hub side die with a heat dissipation structure is provided. Based on the wall thicknesses of a cast, the proper wall thickness ratios of the side die to the cast are designed and the wall thicknesses of parts of the side die are determined. Through change of the wall thicknesses of the side die, die casting temperatures of parts of the cast are balanced, orderly solidification of the cast is realized, and the cast forming time differences between the parts of an aluminum hub are reduced effectively through natural heat dissipation.

Description

A kind of aluminum alloy wheel hub flange mould with radiator structure

Technical field

The utility model belongs to the die casting field, is specifically related to a kind of aluminum alloy wheel hub flange mould with radiator structure.

Background technology

In the casting aluminium alloy wheel hub process, the quality of wheel hub depends on the quality of wheel hub blank foundry goods.Low Pressure Casting Technology has been widely used as making the method for aluminum alloy hub blank foundry goods because of himself advantage.Casting mould is the key processing equipment of wheel hub moulding.Casting mould is comprised of upper die and lower die, Bian Mo and mould bases, and the temperature of mould is the key factor that affects casting quality.

Considered in the past machinability, the wall thickness of the limit mould in the mould molding system is designed to uniform thickness, thickness error generally is no more than 10mm.But the wall thickness of hub cast is inhomogeneous, and like this with regard to so that the thinner position of when casting casting thickness has better flowability because of metal heat preservation, moulding is very fast, but the thicker position of casting thickness does not cause setting rate slow because dispel the heat.Foundry goods each several part cooling velocity is different during liquid metal filling, process of setting namely produces stress, cause each position volume contraction asynchronous, form pore and shrinkage cavity, follow-up when carrying out surface treatment, hole can be intake, spray again and when electroplating rear baking, when gases are heated, they expand in the hole, causes the hub cast surface blistering, do not reach the surface quality requirement, and can't be by gas leakage and antifatigue test.Because the each several part wall unevenness of wheel hub is even, setting time presents gradient difference in the forming process.So the generation of avoiding shrinkage cavity and pore need to improve the type of cooling of casting mould.

At present, air-cooled and water-cooled dual mode is adopted in the cooling of die casting usually.Air-cooled cooling velocity is slow, and production efficiency is low, is applicable to the little mould of heat dissipation capacity.And the mould of employing water-cooled, amount of cooling water and cooling velocity are large, are difficult to accurately control cooling position, and need to offer cooling water channel at mould, so the structure of mould is relatively complicated.Above-mentioned dual mode all needs the equipment of external supply cooling medium, and energy resource consumption is large.

The utility model content

Design object of the present utility model is the time difference that makes foundry goods Hou Chu and Bao Chu dwindle cooling, solidify by the mould natural heat dissipation, to reduce energy consumption, simplifies mould structure, enhances productivity.Prior art limit mode structure 1 as shown in Figure 1 can't be eliminated the velocity gradient of foundry goods moulding.For achieving the above object, the utility model provides a kind of brand-new limit mould design, utilizes the wall thickness change of limit mould, can effectively control the process of setting of foundry goods, realizes the consecutive solidification of foundry goods.

The utility model limit mould body is provided with radiator structure, the position that corresponding hub cast is thicker on the mould of limit increases mold wall thickness, the utility model limit mode structure 2 as shown in Figure 2, the cast iron that utilizes wall thickness to increase absorbs and conduction is cast heat to air, improve the flowability at thicker position, accelerate its cooling, eliminate the gradient type refrigerating mode that forms because of the foundry goods became uneven, the time difference that makes the thicker position of foundry goods and thinner position will cool off, solidify shortened to for 3 to 8 seconds.

The limit mould of described a kind of aluminium alloy wheel hub with radiator structure, it is characterized in that: the wall ratio of limit mould zones of different is different, it is that the wall ratio of rim area is 4.5 greater than 5 that wheel rim and spoke connect the zone walls thickness rate, and the wall ratio at installed surface position, wheel hub center is 1.6.

Beneficial effect:

The utility model is verified by production practices, and internal soundness and the surface quality of die casting have improved in the hub cast dense structure that produces, and wearability and the corrosion resistance of cast(ing) surface strengthen by testing not only, and the hardness of whole foundry goods also is improved.Need not increase in addition water-cooled or air cooling equipment, reduce the use amount of the energy, reduce production cost.Improved production efficiency, cooling, setting time is poor shortened for 3 to 8 seconds.Stablize the dimensional accuracy of die casting, improved the mold use life-span.

Description of drawings

Accompanying drawing 1 is the mould structure schematic diagram of prior art.

Fig. 2 is the example structure schematic diagram after the utility model improves.

Among the figure: 1. the limit mode structure of prior art, 2. limit of the present utility model mode structure.

The specific embodiment

A kind of aluminum alloy wheel hub flange mould with radiator structure of the utility model, thick corresponding to hub cast wall thickness wheel rim maximum, that temperature is the highest, heat is the most concentrated in the die cavity when casting and spoke handover region increase limit die wall on the mould of limit, the utility model limit mode structure 2 as shown in Figure 2, utilize the wall thickness that increases to absorb and the conduction heat, strengthen the flowability of molten metal, accelerate cooling velocity, thereby the balanced mould temperature at foundry goods different-thickness position, type is sequentially filled in the casting process realization, makes the whole cooling velocity of foundry goods even.

For reaching purpose of design, the utility model goes out the wall ratio of Bian Mo and foundry goods by the sunykatuib analysis of casting process and to casting the calculating of heat as basic engineering take the wall thickness of foundry goods, determine each regional wall thickness of limit mould.Wherein, it is large that wheel rim and spoke connect area thickness, in order to increase intensity of cooling herein, chooses wall ratio greater than 5; Rim area around casting mold, foundry goods is thinner, and foundry goods should solidify at first herein, has chosen larger wall ratio, namely gets 4.5; In the centre of casting mold, the foundry goods wall is thicker, in order to give full play to the feeding effect of trumpet assembly, is conducive to the foundry goods consecutive solidification, wishes final set herein.When design casting mold wall thickness, chosen less wall ratio, namely casting mold wall thickness and casting section thickness is smaller, is 1.6; The wall thickness smooth excessiveness at other position of casting mold.

By the thick variation of limit die wall, the mould temperature at each position of balanced foundry goods is conducive to the consecutive solidification of foundry goods.Make cooling, the process of setting of foundry goods pass through natural heat dissipation, effectively shorten the casting time difference at each position of aluminum alloy wheel hub casts.

Claims

1. the aluminum alloy wheel hub flange mould with radiator structure comprises the limit mould body, has wheel rim and spoke to connect zone, rim area and wheel hub center installed surface on the mould body of limit, and it is characterized in that: described limit mould body is provided with radiator structure.

2. described a kind of aluminum alloy wheel hub flange mould with radiator structure according to claim 1, it is characterized in that: the wall ratio of limit mould zones of different is different.

3. described a kind of aluminum alloy wheel hub flange mould with radiator structure according to claim 1 is characterized in that: wheel rim and spoke connect the zone walls thickness rate for greater than 5, and the wall ratio of rim area is 4.5, and the wall ratio at installed surface position, wheel hub center is 1.6.