CN210587018U

CN210587018U - Hollow casting sand core of automobile beam

Info

Publication number: CN210587018U
Application number: CN201921348680.0U
Authority: CN
Inventors: 王占成; 王世林
Original assignee: Hubei Gucheng Donghua Technology Co ltd
Current assignee: Hubei Gucheng Donghua Technology Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-05-22
Anticipated expiration: 2029-08-19

Abstract

The utility model relates to the technical field of automobile part casting, in particular to a hollow casting sand core of an automobile beam, which comprises a left sand core and a right sand core, wherein the length of the left sand core is less than that of the right sand core, the left end surface of the right sand core is provided with a convex block extending outwards, the right end surface of the left sand core is provided with a groove corresponding to the convex block, after the convex block of the right sand core is inserted into the groove of the left sand core, the left end surface of the right sand core and the right end surface of the left sand core are spliced into a plane, a bonding agent is coated at the joint of the splicing surfaces, the left end surface of the right sand core and the right end surface of the left sand core are respectively provided with hollow cavities extending towards the other end, the structure of the utility model is scientific, the structural combination of the upper sand core and the lower sand core in the prior art is changed into a left part and a right part, thereby improving the strength of the sand core and avoiding the deformation of the sand core.

Description

Hollow casting sand core of automobile beam

Technical Field

The utility model relates to an automobile parts casting technical field especially relates to a cavity formula casting psammitolite in vehicle chassis crossbeam.

Background

The cross beams are important parts of the automobile chassis, the left longitudinal beams and the right longitudinal beams are connected together through the cross beams to form a complete frame, and the cross beams are installation points of a plurality of mechanisms. In heavy trucks, commercial vehicles and other vehicle types, especially, the carrying capacity is large, the use working condition is complex, and the frame is easy to break. Therefore, how to make the structure reliable and the weight light is a difficult problem in the design of the chassis. Fig. 1 shows an optimized cast cross beam (a cross beam, i.e. a draft sill) with a hollow structure inside. When the precoated sand is used for casting, a sand core shown in the figure 2 is placed inside the sand core for forming an internal structure, and in order to avoid casting defects, the inside of the sand core needs to be a hollow structure, the sand core is divided into an upper sand core and a lower sand core along the length direction in the prior art, sand shells are respectively manufactured, and then the sand cores are combined together to form a complete sand core, because the length shape of the sand core is a long flat shape, the sand core is easy to deform in the sand core forming process, the upper sand core and the lower sand core can not be well combined together, a large gap can be generated in the splicing part, and the deformed sand core can not be used for casting.

Disclosure of Invention

An object of the utility model is to prior art not enough, and provide a cavity formula casting psammitolite in beam, its structure science, the structure of two former upper and lower psammitolites changes into about each part to with its concatenation back amalgamation, cavity in the opening formation of terminal surface department, thereby improve the intensity of psammitolite, avoid its deformation.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an automobile beam cavity casting psammitolite, its includes left psammitolite, right psammitolite, the length of left psammitolite is less than the length of right psammitolite, the left end face of right psammitolite is provided with the lug that outwards stretches out, the right-hand member face of left psammitolite be provided with the recess that the lug corresponds, the lug of right psammitolite inserts behind the recess of left psammitolite, the left end face of right psammitolite is a plane with the right-hand member face amalgamation of left psammitolite, and the binder has been paintd in handing-over department of this amalgamation face, the left end face of right psammitolite.

Preferably, the thickness of the left sand core and the thickness of the right sand core are both larger than 2 cm.

Preferably, the splicing surfaces of the left sand core and the right sand core are planes, and the planes are perpendicular to the length directions of the left sand core and the right sand core.

Preferably, the length of the bump is greater than 3 cm.

Preferably, the cross section of the hollow cavity is in a convex shape.

The utility model has the advantages that: the utility model provides a cavity casting psammitolite in car crossbeam, its includes left psammitolite, right psammitolite, the length of left side psammitolite is less than the length of right psammitolite, the left end face of right side psammitolite is provided with the lug that outwards stretches out, the right-hand member face of left side psammitolite be provided with the recess that the lug corresponds, the lug of right side psammitolite inserts behind the recess of left side psammitolite, the left end face of right side psammitolite is a plane with the right-hand member face amalgamation of left side psammitolite, the handing-over department of this amalgamation face has paintd the binder, the left end face of right side psammitolite, the right-hand member face of left side psammitolite are provided with the well cavity that extends to the other end respectively about changing the structural grouping of two psammitolites among the prior.

Drawings

Fig. 1 is the utility model discloses a cavity formula casting psammitolite is used for the structure sketch map of as cast crossbeam in the car crossbeam.

Fig. 2 is the utility model discloses a structural schematic of cavity formula casting psammitolite in the car crossbeam.

Fig. 3 is a schematic diagram of the structure of the left sand core of fig. 2.

Fig. 4 is a schematic diagram of the structure of the right sand core of fig. 2.

Description of reference numerals:

1-left sand core 11-groove

2-right sand core 21-projection.

Detailed Description

The following detailed description of the present invention is provided in connection with the accompanying drawings and the embodiments, and is not intended to limit the scope of the invention.

As shown in fig. 1 the utility model discloses a casting psammitolite is used for as cast crossbeam, and its inside is cavity, adopts the precoated sand casting process, will the utility model discloses a casting psammitolite is put inside, has the sand shell about the outside respectively, forms the casting die cavity unanimous with the product structure, obtains the product of fig. 1 after the casting.

As shown in fig. 2, 3 and 4, the hollow casting sand core for the automobile beam comprises a left sand core 1 and a right sand core 2, in the embodiment, the beam to be cast is of a bilaterally symmetrical structure and is asymmetrical in the top and bottom, a mold core in the shape shown in fig. 2 is required inside the casting process, the mold core cannot be of a solid structure due to the large volume, otherwise, the sand core cannot be slightly deformed during casting, and the casting is defective. In order to form the hollow structure of the mold core, the mold core is divided into two parts in the prior art, so that the mold core is flatter and has different stresses on two surfaces, and the mold core is warped after high temperature during shell manufacturing. The utility model discloses a solve this problem, with the psammitolite along the middle part fall into about two parts, there is the pin at the middle part of the psammitolite in this embodiment, consequently squints the certain distance, leads to the length of left psammitolite 1 to be less than the length of right psammitolite 2. In order to enable the left sand core 1 and the right sand core 2 to be connected into a whole, the left end face of the right sand core 2 is provided with a protruding block 21 which extends outwards, the right end face of the left sand core 1 is provided with a groove 11 which corresponds to the protruding block 21, after the protruding block 21 of the right sand core 2 is inserted into the groove 11 of the left sand core 1, the left end face of the right sand core 2 and the right end face of the left sand core 1 are spliced into a plane, and then a binding agent is coated at the joint of the spliced planes.

The utility model discloses in, in order to produce hollow structure in left psammitolite 1, right psammitolite 2, when making the shell, make solid construction with it earlier when sandblast system shell, then high temperature is stereotyped, and controlled temperature, time, and the hot side, then take out it from the mould, left side psammitolite 1's right-hand member face, right side psammitolite 2's left end face slopes down respectively, because above-mentioned system shell technology, make left psammitolite 1, right psammitolite 2's inside and terminal surface part middle part do not consolidate the blocking, and still be granular sand, after the slope, non-fashioned sand flows out, cavity in the formation.

The thickness of the sand shell can be determined by setting the high-temperature time, and the thicknesses of the left sand core 1 and the right sand core 2 are both larger than 2 cm.

As shown in fig. 2, 3 and 4, the splicing surfaces of the left sand core 1 and the right sand core 2 are planes, the planes are perpendicular to the length directions of the left sand core 1 and the right sand core 2, the length of the projection 21 is greater than 3cm, and the cross section of the hollow cavity is in a convex shape.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. Hollow casting psammitolite of beam, its characterized in that: including left psammitolite (1), right psammitolite (2), the length of left psammitolite (1) is less than the length of right psammitolite (2), the left end face of right psammitolite (2) is provided with outside lug (21) of stretching out, the right-hand member face of left psammitolite (1) be provided with recess (11) that lug (21) correspond, insert lug (21) of right psammitolite (2) behind recess (11) of left psammitolite (1), the left end face of right psammitolite (2) and the right-hand member face amalgamation of left psammitolite (1) are a plane, and the handing-over department of this amalgamation face has been smeared with the binder, the left end face of right psammitolite (2), the right-hand member face of left psammitolite.

2. The automotive cross-beam hollow casting sand core of claim 1, wherein: the thicknesses of the left sand core (1) and the right sand core (2) are both larger than 2 cm.

3. The automotive cross-beam hollow casting sand core of claim 1, wherein: the splicing surfaces of the left sand core (1) and the right sand core (2) are planes, and the planes are perpendicular to the length directions of the left sand core (1) and the right sand core (2).

4. The automotive cross-beam hollow casting sand core of claim 1, wherein: the length of the bump (21) is more than 3 cm.

5. The automotive cross-beam hollow casting sand core of claim 1, wherein: the cross section of the hollow cavity is in a convex shape.