CN210387450U

CN210387450U - Sand mold structure of commercial vehicle wheel hub

Info

Publication number: CN210387450U
Application number: CN201920658667.9U
Authority: CN
Inventors: 田冬敏; 张波; 唐超; 朱志鹏; 田迎新
Original assignee: Shanghai Sandmann Foundry Co Ltd
Current assignee: Shanghai Sandmann Foundry Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-04-24
Anticipated expiration: 2029-05-09

Abstract

The application discloses commercial car wheel hub's sand mould structure, including the sand mould body, be provided with into criss-cross gate on the sand mould body, the gate center is connected in the sprue, be provided with the foundry goods die cavity in four regions that the cross gate cross was cut apart respectively, every the foundry goods die cavity is connected respectively in a sharing hot rising head and an independent hot rising head, every sharing hot rising head is connected in two the foundry goods die cavity, every independent hot rising head is connected in one the foundry goods die cavity, sharing hot rising head and independent hot rising head connect respectively in the gate. The utility model has the advantages of adopt the hot rising head of sharing and the double hot rising head technology of independent hot rising head, not only satisfy the inside shrinkage porosity requirement of product, improve the technology yield, still reduce the rejection rate, improve production efficiency.

Description

Sand mold structure of commercial vehicle wheel hub

Technical Field

The application relates to the field of automobile part casting, in particular to a sand mold structure of a commercial vehicle wheel hub.

Background

The commercial vehicle hub is a platform product and can be applied to various vehicle types, and the commercial vehicle hub needs higher performance requirements than a common car hub due to the fact that the service condition of the commercial vehicle hub is poor, so that the service life and the safety of the follow-up commercial vehicle hub are ensured.

At present, the similar products cast by the traditional process adopt a cold and hot riser process, the yield is about 46%, the rejection rate is about 8.4%, the internal shrinkage porosity of a casting exceeds the standard requirements of customers, the defects of 100% are required, the customers complain frequently, and the production labor cost of a company is greatly wasted.

The technology of the novel commercial vehicle wheel hub improves the technological yield and reduces the rejection rate on the premise of ensuring the customer requirements, and meanwhile, the flexibility of the production process is ensured through the mode of switching the main model by the universal mould, and the problems of production waste and the like are avoided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sand mould structure of commercial car wheel hub adopts the hot rising head of sharing and the double-heat rising head technology of hot rising head alone, not only satisfies the inside shrinkage porosity requirement of product, improves the technology yield, still reduces the rejection rate, improves production efficiency, adopts novel material technology also to promote commercial car wheel hub life and security under abominable service condition simultaneously.

In order to achieve the above object, the present invention provides the following technical solutions.

The embodiment of the application discloses commercial car wheel hub's sand mould structure, including the sand mould body, be provided with into criss-cross gate on the sand mould body, the gate center is connected in the sprue, be provided with the foundry goods die cavity in four regions that the cross gate cross was cut apart, every the foundry goods die cavity is connected respectively in a sharing hot riser and a single hot riser, every sharing hot riser is connected in two the foundry goods die cavity, every single hot riser is connected in one the foundry goods die cavity, sharing hot riser with single hot riser connect respectively in the gate.

Preferably, in the sand mold structure of the commercial vehicle wheel hub, a filter screen is arranged between the sprue and the runner, the filter screen is made of ceramic with a length, a width and a thickness of 66 × 12.5mm, and two filter screens are arranged.

Preferably, in the sand mold structure of the commercial vehicle hub, the four casting mold cavities are different or partially different in structure.

Preferably, in the sand mold structure of the commercial vehicle wheel hub, the common thermal riser and the single thermal riser are respectively connected to the casting cavity by a riser neck structure, and the modulus of the riser neck is 2.5 mm.

Preferably, in the sand mold structure of the commercial vehicle wheel hub, the common thermal riser and the single thermal riser are respectively connected to the casting cavity through an ingate, and the flow blocking sectional area of the ingate is 541mm²。

Preferably, in the sand mold structure of the commercial vehicle hub, the cross runner has a flow blocking cross-sectional area of 300mm²The flow-resisting sectional area of the straight pouring gate is 1962.5mm²。

Preferably, in the sand mold structure of the commercial vehicle hub described above, one sand core is used for each casting cavity.

Preferably, in the sand mold structure of the commercial vehicle hub, the chemical components of the commercial vehicle hub comprise, by mass: 3.50 to 3.70 percent of C, 2.25 to 2.50 percent of Si, 0.35 to 0.45 percent of Mn, less than or equal to 0.05 percent of P, less than 0.013 percent of S and 0.03 to 0.06 percent of Mg.

The utility model has the advantages that the double-hot riser process of the shared hot riser and the independent hot riser is adopted, the internal shrinkage porosity of the casting can be met on the premise of riser feeding energy which is fully utilized as far as possible, and the process yield is improved to about 53 percent; the riser and the ingate are in common connection, the ingate buffers molten iron in a sheet lap joint mode, the sand washing risk is reduced, one-time filtration can be performed, and the rejection rate is reduced to about 3%; cost reduction and efficiency improvement are realized, and meanwhile, the service life and safety of the commercial vehicle wheel hub under severe service conditions are improved by adopting a novel material process.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a sand mold structure of a commercial vehicle wheel hub according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the sand mold structure of the commercial vehicle wheel hub includes a sand mold body, a cross-shaped runner 100 is arranged on the sand mold body, the center of the runner 100 is connected to a sprue 200, casting cavities 300 are respectively arranged in four areas divided by the cross-shaped runner 100, each casting cavity 300 is respectively connected to a common thermal riser 400 and an individual thermal riser 500, each common thermal riser 400 is connected to two casting cavities 300, each individual thermal riser 500 is connected to one casting cavity 300, and the common thermal riser 400 and the individual thermal riser 500 are respectively connected to the runner 100. A filter screen 600 is arranged between the sprue 200 and the cross runner 100, the filter screen 600 is made of ceramic with length, width and thickness 66 x 12.5mm, and two filter screens 600 are arranged. The four casting cavities 300 are all or partially different in configuration. The common thermal riser 400 and the individual thermal risers 500 are respectively connected to the casting cavity 300 by a riser neck structure, and the modulus of the riser neck is 2.5 mm. The shared thermal riser 400 and the single thermal riser 500 are respectively connected to the casting cavity 300 through an ingate 700, and the flow-resisting sectional area of the ingate 700 is 541mm². The flow-resisting sectional area of the horizontal runner 100 is 300mm²The flow-resisting sectional area of the sprue 200 is 1962.5mm². One sand core 800 is used per casting cavity 300. The hub of the commercial vehicle comprises the following chemical components in percentage by mass: 3.50 to 3.70 percent of C, 2.25 to 2.50 percent of Si, 0.35 to 0.45 percent of Mn, less than or equal to 0.05 percent of P, less than 0.013 percent of S and 0.03 to 0.06 percent of Mg.

According to the technical scheme, during pouring, molten iron flows from the sprue to the cross runners, and all the runners buffer the molten iron in a smooth transition mode; the process yield of the product is improved to 53%, the rejection rate is reduced to 3% from 8.4%, the production efficiency is greatly improved, the production cost is reduced, and meanwhile, the service life and the safety of the commercial vehicle hub under the severe service condition are also improved by adopting a novel material process; each casting cavity is provided with 2 risers, so that the requirement of internal shrinkage porosity of the casting can be met on the premise of as few risers as possible; the casting cavity is directly connected with the ingate, so that the sand washing risk is reduced, and the rejection rate is reduced; effectively overcomes the defects of the prior art and has high industrial utilization value.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. The utility model provides a commercial car wheel hub's sand mould structure, a serial communication port, includes the sand mould body, be provided with into criss-cross on the sand mould body, cross center connection is in the sprue, be provided with the foundry goods die cavity in four regions that the cross was cut apart, every the foundry goods die cavity is connected respectively in a sharing hot riser and a hot riser alone, every the hot riser of sharing is connected in two the foundry goods die cavity, every the hot riser of independence is connected in one the foundry goods die cavity, the hot riser of sharing with the hot riser of independence connect respectively in the cross.

2. A sand mold structure for a commercial vehicle hub according to claim 1, wherein a filter screen is provided between the sprue and the runner, the filter screen is ceramic having a length, width and thickness of 66 x 12.5mm, and the filter screen is provided with two pieces.

3. A sand mold structure for a commercial vehicle hub according to claim 1, wherein all four of said casting cavity structures are different or partially different.

4. The sand mold structure for a commercial vehicle hub according to claim 1, wherein the common thermal riser and the individual thermal risers are connected to the casting cavity by means of a riser neck structure, respectively, and the modulus of the riser neck is 2.5 mm.

5. The sand mold structure for a commercial vehicle wheel hub according to claim 1, wherein the common thermal riser and the individual thermal risers are respectively connected to the casting cavity through ingates, and the flow blocking sectional area of the ingates is 541mm²。

6. The sand mold structure for a commercial vehicle hub according to claim 1, wherein a flow-resisting sectional area of the runner is 300mm²The flow-resisting sectional area of the straight pouring gate is 1962.5mm²。

7. A sand mold structure for a commercial vehicle hub according to claim 1, wherein one sand core is used for each casting cavity.