CN100348345C

CN100348345C - Side mold for gravitational casting of automobile hub

Info

Publication number: CN100348345C
Application number: CNB200610034827XA
Authority: CN
Inventors: 简伟文; 程正明
Original assignee: Foshan Nanhai Superband Mould Co Ltd
Current assignee: Foshan Nanhai Superband Mould Co Ltd
Priority date: 2006-04-06
Filing date: 2006-04-06
Publication date: 2007-11-14
Anticipated expiration: 2026-04-06
Also published as: CN1857823A

Abstract

The present invention discloses a side mold for a gravity casting automobile wheel hub, which is mainly composed of an upper ribbed slab 11, a web plate 12, a lower ribbed slab 13 and a supporting rib 14, wherein the upper ribbed slab 11 is positioned on the upper part of the web plate 12 and is also perpendicular to the web plate 12, and the lower ribbed slab 13 is positioned on the lower part of the web plate 12 and is also perpendicular to the web plate 12. The supporting rib 14 is positioned between the outer side of the upper ribbed slab 11 and the outer side of the lower ribbed slab 13, and the number of the supporting rib 14 is one or more; the upper ribbed slab 11 is vertically connected with the lower ribbed slab 13. The application of an automobile wheel hub cast by the present invention has the advantages of effectively reducing the air leakage rate of an RIM part, improving the quality of a product and enhancing market competitive power. As a side mold, the present invention is widely applied to the production of the gravity casting automobile wheel hub.

Description

A kind of side mold of gravitational casting of automobile hub

Technical field

The invention belongs to a kind of gravity casting hub mould, relate in particular to a kind of side mold of gravitational casting of automobile hub mould.

Background technology

The automotive hub mould generally is divided into compression casting hub mold and gravity casting hub mould, and domestic gravity casting hub mould is continued to use the mould process of introducing from Taiwan always and but do not upgraded and improvement.

Traditional gravity casting hub mould, generally comprise parts such as upper die and lower die, side form, side form occupies an important position in the gravity casting hub mould, as shown in Figure 1, be traditional gravity casting hub mould, a whole set of mould mainly is made up of side form 1A, patrix 2, counterdie 3, the center the automotive hub 4 cast by this mold of correspondence.Wherein, about side form 1A each one, as shown in Figure 2, it mainly is made up of last gusset 11, web 12, lower web plate 13, middle ribs 18, brace rod 14, middle ribs 18 is between last gusset 11 and lower web plate 13, and is and parallel with last gusset 11, lower web plate 13.Find in the practice, the wheel hub that utilizes the mould of this kind structure to cast, there is the too high problem of rate of losing heart all the time in its RIM position.RIM, i.e. the wheel wet end position of wheel hub, the position that contacts with tire in the wheel hub just, the RIM position rate of losing heart is too high, is related to the safe in utilization of wheel hub, tire, passenger car.And the disappointing too high major reason of rate in wheel hub RIM position is that there is irrational radiating mode in the side mold that is utilized, causes the interference of mold temperature field to casting solidification.

Summary of the invention

At the deficiency in the conventional art, a kind of side mold of the special proposition of the present invention, the automotive hub that utilizes this side mold to cast, the disappointing too high problem of rate in its RIM position can effectively be solved.

The present invention has adopted following technical scheme:

A kind of side mold of gravitational casting of automobile hub mainly is made up of last gusset 11, web 12, lower web plate 13, brace rod 14.Last gusset 11 be positioned at web 12 top and with 12 vertical connections of web, lower web plate 13 be positioned at web 12 the bottom and with 12 vertical connections of web, brace rod 14 is between the outside of the outside of last gusset 11 and lower web plate 13, the bar number of brace rod 14 is one or one or more, and with

last gusset

11,13 vertical connections of lower web plate.

Because gusset itself not only has the effect of strengthening mechanical strength, and has an effect of heat radiation, if between lower web plate on the web 12 11,13, gusset is set again, though strengthened the mechanical strength of mould, also increased simultaneously heat radiation to web 12, and the position between the last lower web plate, just corresponding is the RIM position of automotive hub.If the heat radiation of this position is incorrect, will cause this position to have an irrational temperature field, cause the automotive hub RIM position feeding difficulty of casting, thereby cause the RIM position to be lost heart.

Among the present invention, to be unlikely distortion excessive in order to increase the side form heat endurance, and above-mentioned one or one or more brace rod 14 are between the outside of the outside of last gusset 11 and lower web plate 13; Position between the outside of gusset or lower web plate on the what is called mainly is meant between brace rod 14 and the web 12 and leaves the gap, thereby reduces the path of the heat radiation of web 12.Many brace rods 14, both can be with last gusset 11, lower web plate 13 is all vertical is connected, also can be connected with last gusset 11, lower web plate 13 with the structure of man-like shelf class, the brace rod of horizontal connection can also be set between brace rod 14, as long as reach enough mechanical strengths, all be the application scheme that is equal to.

In order further to improve technique effect, the inside top of the present invention's gusset 11 on side mold is provided with cannelure 15; Cannelure 15 plays the blocking part heat on the one hand to gusset heat radiation conduction, adds heat-preservation cotton on the other hand and can play the effect that reduces area of dissipation in groove, like this, can better solve the problem of mold temperature field to the interference of casting solidification.

In order further to improve technique effect, the mold wall wall thickness of side form BC section is set to increase gradually to lower wall thickness from upper wall, and for example, the thickness of side form wall carries out the transition to 35mm from 20mm; And the position of the pairing wheel hub of the side form BC section RIM portion of wheel hub just; On casting technique, stick on heat-preservation cotton simultaneously, be beneficial to the insulation of side form upper position, avoid the casting material of upper position to solidify in advance, influence feeding at the upper position of side form web.Such improvement helps the consecutive solidification of automotive hub RIM portion.

In order further to improve technique effect, the present invention dwindles rising head 16, and move to the following inboard of gusset on the side form, such technological improvement, since in the increase of side form upper position insulation material, insulation to whole rising head 16 more has real value, can avoid the casting material at rising head 16 places to solidify in advance, thereby reaches the purpose that not only reduces casting weight but also can reach perfect product.

The technological improvement measure that the present invention taked can reach following beneficial effect:

(1) compares traditional moulds and temperature field of the present invention, the influence of the temperature field of 18 pairs of whole foundry goods of ribs is very big in the middle of finding, and side form temperature of the present invention is gradient very uniformly from the top of BC section to lower area, the basic thermograde that keeps about 25 ° in preceding 30 seconds.

(2) cast analysis.The foot temperature of traditional moulds BC section in the time of 12 seconds has been higher than top, this moment is lost the feeding function to it on top, and the BC section is corresponding to the RIM portion of wheel hub, the disappointing just the highest position of rate, in the present invention, the wall thickness of BC section increases from top to bottom gradually, therefore, the pairing wheel hub RIM of the present invention portion is the consecutive solidification state of cooling very uniformly, has reduced the disappointing rate of RIM portion.

(3) the feeding time ratio traditional moulds of side riser 16 of the present invention has also prolonged about 40 seconds, and this also is fit to the order of solidifying of next circulation foundry goods.Be very beneficial for the consecutive solidification of whole wheel hub RIM portion, thereby effectively reduced the disappointing rate of wheel hub RIM portion.

The present invention is widely used in all kinds of gravitational casting of automobile hub moulds, for the disappointing rate that reduces wheel hub RIM portion significant effect is arranged, and can improve the quality of product, enhances one's market competitiveness.

Description of drawings

Fig. 1 is the assembling schematic diagram of traditional gravitational casting of automobile hub mould;

Fig. 2 is the structure schematic diagram of traditional moulds side form;

Fig. 3 is the Facad structure schematic diagram of traditional moulds side form;

Fig. 4 is the structure schematic diagram of embodiments of the invention;

Fig. 5 is the Facad structure schematic diagram of embodiments of the invention;

Fig. 6 is the generalized section of embodiments of the invention;

Fig. 7 is the assembling schematic diagram that the present invention is applied to a whole set of gravitational casting of automobile hub mould.

The specific embodiment

Below in conjunction with accompanying drawing, further specify the specific embodiment of the present invention:

As shown in Figure 4, a kind of side mold of gravitational casting of automobile hub, form by last gusset 11, web 12, lower web plate 13, brace rod 14, last gusset 11 is positioned at the top of web 12 and vertical with web 12, lower web plate 13 is positioned at the bottom of web 12 and vertical with web 12, brace rod 14 is between the outside of the outside of last gusset 11 and lower web plate 13, and the bar number of brace rod 14 is 4, and with

last gusset

11,13 vertical connections of lower web plate.Cannelure 15 is positioned at gusset 11 inside top places on the side mold, and is positioned at the side of side riser 16.

As shown in Figure 5, side riser 16 is positioned at the following inboard of gusset 11, below side riser 16, it is exactly the BC section of side mold, it is corresponding to the RIM portion of wheel hub, their relation can more clearly see that the BC section among Fig. 6 is exactly the zone corresponding to wheel hub RIM portion by Fig. 6, and we mark RIM position corresponding to wheel hub with label 17.In Fig. 6, AB section wherein is exactly the zone of side riser 16, traditional mould of comparing, and the zone of side riser 16 reduces to some extent.In Fig. 5 and Fig. 6, we can clearly see, the mold wall thickness of BC section is being followed the principle that increases gradually from top to bottom, and concrete data are 20 millimeters and carry out the transition to 35 millimeters.

Because the present invention only relates to the side mold of gravity casting hub mould, and side mold is the part of hub mold, for concrete application of the present invention clearly is described, we have added with reference to figure 7, in Fig. 7, label 1 be side mold, about each one, we can be referred to as left side mould and right side mould respectively, their two profiles that synthesize a circle, and they are exactly the improved object of the technology of the present invention; 2 is the patrix of gravity casting hub mold, and it mainly forms the part that axletree is installed at the wheel hub center, and the center of described wheel hub is the strength member that connects brake drum (or brake disc), wheel disc and semiaxis, and it is contained on central siphon or the knuckle axle journal with bearing holder (housing, cover); 3 is the counterdie of gravity casting hub mold, and it mainly forms the outward appearance of wheel hub, i.e. common our part that can see on the tire of automobile is such as spoke etc.; 4 is the automotive hub of this mold gravitational casting.In the gravity casting hub mould, use the present invention, can effectively reduce the disappointing rate of corresponding wheel hub RIM portion of institute, improve the safety coefficient of wheel hub use.

Claims

1. the side mold of a gravitational casting of automobile hub comprises web (12), it is characterized in that:

Comprise that is also gone up a gusset (11), last gusset (11) is positioned at the top of web (12) and vertical with web (12);

Also comprise a lower web plate (13), lower web plate (13) is positioned at the bottom of web (12) and vertical with web (12);

Also comprise brace rod (14), brace rod (14) is positioned between the outside of the outside of gusset (11) and lower web plate (13); The bar number of described brace rod (14) is one or one or more, and with last gusset (11), the vertical connection of lower web plate (13).

2. a kind of gravitational casting of automobile hub side mold according to claim 1 is characterized in that: the inside top of gusset (11) is provided with cannelure (15) on described.

3. a kind of gravitational casting of automobile hub side mold according to claim 1 and 2 is characterized in that: the wall thickness in wheel hub RIM portion pairing side mold zone increases from top to bottom gradually.

4. a kind of gravitational casting of automobile hub side mold according to claim 3 is characterized in that: the wall thickness in wheel hub RIM portion pairing side mold zone carries out the transition to 35mm from 20mm.

5. a kind of gravitational casting of automobile hub side mold according to claim 4 is characterized in that: the top of the outer surface of described web (12), post one deck heat-preservation cotton.

6. a kind of gravitational casting of automobile hub side mold according to claim 5 is characterized in that: side mold side riser (16) is positioned at the following inboard of gusset (11).