CN216370118U - Sand core structure applied to low-pressure casting hollow auxiliary frame - Google Patents
Sand core structure applied to low-pressure casting hollow auxiliary frame Download PDFInfo
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- CN216370118U CN216370118U CN202122589943.0U CN202122589943U CN216370118U CN 216370118 U CN216370118 U CN 216370118U CN 202122589943 U CN202122589943 U CN 202122589943U CN 216370118 U CN216370118 U CN 216370118U
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Abstract
The utility model discloses a sand core structure applied to a low-pressure casting hollow auxiliary frame, which comprises a sand core main body; the sand core main body comprises a concave sand core part and a convex sand core part, the convex sand core part is spliced on the concave sand core part, and the convex sand core part is molded corresponding to the position of the auxiliary frame casting; a sand core cavity is arranged between the concave sand core part and the convex sand core part; according to the inner cavity modeling and the structural characteristics of the auxiliary frame casting, the sand core main body is split into the concave sand core part and the convex sand core part, and the concave sand core part and the convex sand core part are combined into the hollow split type sand core main body, so that the overall weight of the sand core is effectively reduced, and the auxiliary frame casting is convenient to sand during sand shaking.
Description
Technical Field
The utility model relates to the technical field of automobile manufacturing, in particular to a sand core structure applied to a low-pressure casting hollow auxiliary frame.
Background
With the rapid development of new energy automobiles, the requirement for light weight of automobiles is increasingly strong, and the application cases of hollow structures on automobile components are gradually increased, such as hollow auxiliary frames and the like. The auxiliary frame is used as a part for supporting the front axle and the rear axle and suspending the front axle and the rear axle of the vehicle frame and comprises an auxiliary frame cross beam and an auxiliary frame longitudinal beam. Currently, the forming process of such automobile components is mainly based on low-pressure sand core casting. For large automobile components, the volume of the hollow inner cavity is too large (such as the position of a joint part between a subframe cross beam and a subframe longitudinal beam), so that production problems of large sand consumption, difficulty in sand shaking and the like exist. Therefore, the sand core structure needs to be designed and optimized to meet the use requirement of the produced aluminum alloy auxiliary frame.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a sand core structure applied to a low-pressure casting hollow auxiliary frame.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the sand core structure applied to the low-pressure casting hollow auxiliary frame comprises a sand core main body, wherein the outer side surface of the sand core main body is used as a casting cavity surface and is molded corresponding to the casting cavity surface of the auxiliary frame; the sand core main body comprises a concave sand core part and a convex sand core part, the convex sand core part is spliced on the concave sand core part, and the convex sand core part is molded corresponding to the position of the auxiliary frame casting; and a sand core cavity is arranged between the concave sand core part and the convex sand core part, and the surface of the sand core cavity is used as a non-casting cavity surface.
According to the sand core structure of the low-pressure casting mold, the sand core main body is divided into the concave sand core part and the convex sand core part according to the inner cavity modeling and the structural characteristics of the auxiliary frame casting, and the concave sand core part and the convex sand core part are combined into the hollow split type sand core main body, so that the overall weight of the sand core is effectively reduced, and the auxiliary frame casting is convenient to sand during sand shaking.
As some preferred embodiments of the present invention, a first mating surface, a second mating surface, and a third mating surface are sequentially disposed between the concave core portion and the convex core portion from outside to inside, and a step shape is formed between the first mating surface, the second mating surface, and the third mating surface, where the first mating surface and the third mating surface are vertical surfaces, and the second mating surface is a horizontal surface.
As some preferred embodiments of the utility model, the gap D at the first mating surface between the female sand core portion and the male sand core portion10 to 0.20 mm.
As some preferred embodiments of the utility model, a gap D at the second mating surface between the female sand core portion and the male sand core portion20.25 to 0.35 mm.
As some preferred embodiments of the utility model, a gap D at a third mating surface between the female sand core portion and the male sand core portion30.05-0.15 mm.
As some preferred embodiments of the utility model, the intersection corner of the first mating surface and the second mating surface of the convex sand core part is R1The intersection corner of the first matching surface and the second matching surface of the concave sand core part is R2Said R is1The R is2Is satisfied by R1＞R2。
As some preferred embodiments of the utility model, the wall thickness T at the non-casting cavity face of the male core portion1≥15mm。
As some preferred embodiments of the utility model, the wall thickness T at the non-casting-face cavity surface of the female sand core portion is greater than or equal to 15mm, and the root fillet R of the non-casting-face cavity of the female sand core portion is greater than or equal to 5 mm.
The utility model has the beneficial effects that:
1. the new sand core structure splits the original integral sand core into two or more concave sand core parts with local conformal wall thickness and the convex sand core part, and combines the concave sand core parts and the convex sand core parts into a hollow split type sand core, thereby effectively reducing the whole weight of the sand core and being easy to process a sand core cavity;
2. the design of the sand core cavity of the new sand core structure ensures that the auxiliary frame casting is convenient to sand during sand shaking;
3. the new sand core structure is suitable for a low-pressure casting die of a hollow auxiliary frame.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a perspective view of the male sand core portion of the present invention;
FIG. 4 is a top view of the present invention;
fig. 5 is a schematic view of the section a-a in fig. 4.
Reference numerals:
a core body 100, a first mating surface 101, a second mating surface 102, a third mating surface 103, a casting cavity surface 110, a core cavity 120, a non-casting cavity surface 130, a pin placement area 140, a sand shooting port molding station 150; female core portion 200, male core portion 300.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the utility model can be practiced without these specific details, i.e., those skilled in the art can more effectively introduce the essential nature of their work to others skilled in the art using the description and presentation herein.
It should be further noted that the terms "upper" and "lower" and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, and that simple, non-inventive adjustments to such directions by those skilled in the art should not be construed as techniques outside the scope of the present application.
If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.
It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe arrangements, etc., have not been described in detail since they are readily understood by those of ordinary skill in the art, in order to avoid obscuring the present invention.
Fig. 1 is a perspective view showing an embodiment of the present invention, and referring to fig. 1, the embodiment of the present invention provides a sand core structure applied to a low pressure casting hollow subframe, which includes a sand core body 100, and an outer side surface of the sand core body 100 is formed as a casting cavity surface 110 corresponding to an inner cavity surface of a subframe casting.
Further, referring to fig. 2 and 3, the sand core main body 100 includes a concave sand core portion 200 and a convex sand core portion 300, the convex sand core portion 300 is spliced on the concave sand core portion 200, and the convex sand core portion 300 is molded corresponding to the position of the sub frame casting. The shape of the female core portion 200, the shape, number, etc. of the male core portions 300 are thus determined by the particular shape of the sub frame casting and the production requirements.
Still further, a sand core cavity 120 is arranged between the concave sand core part 200 and the convex sand core part 300, and the surface of the sand core cavity 120 is used as a non-casting cavity surface 130. When the core body 100 is to be removed, the hollow design of the core cavity 120 may be adapted to the vibration to vibrate and collapse the core, thereby facilitating removal of the core body 100.
In the production process, the sand core main body 100 is placed in a mold, the mold is closed, casting is started, the mold is opened after the molten metal is filled and solidified, and a casting is taken out (the casting and the sand core main body 100 are combined together at the moment). Then, the casting is placed in special sand shaking equipment (specifically referring to the sand shaking process technology in the existing low-pressure casting technology), sand shaking is started, the sand core body 100 in the casting is shaken to be broken, and sand flows out from a sand outlet on the casting until the sand completely flows out.
The above disclosure of a sand core structure applied to a low pressure casting hollow subframe is only a preferred embodiment of the present invention, and is only for the purpose of illustrating the technical solution of the present invention, and not for the purpose of limiting the same. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not necessarily indicative of any particular order, nor are they intended to be limiting.
In some embodiments, the subframe casting includes a subframe cross member portion and a subframe side member portion. The male sand core portion 300 corresponds to the subframe cross member portion, the subframe longitudinal member portion, and the junction of the subframe cross member portion and the subframe longitudinal member portion.
In some embodiments, the male core portion 300 and the female core portion 200 are arranged on the upper side and the lower side, i.e., the female core portion 200 is spliced to the upper side of the male core portion 300.
In some embodiments, the first mating surface 101, the second mating surface 102, and the third mating surface 103 are sequentially disposed from outside to inside between the female core portion 200 and the male core portion 300, and the first mating surface 101, the second mating surface 102, and the third mating surface 103 form a step shape, wherein the first mating surface 101 and the third mating surface 103 are vertical surfaces, and the second mating surface 102 is a horizontal surface.
In some embodiments, referring to fig. 4, 5, the gap D at the first mating surface 101 between the female core portion 200 and the male core portion 300 is10 to 0.20 mm. The first mating surface 101 is an interference gap D to avoid casting flash.
In some embodiments, the gap D at the second mating surface 102 between the female core portion 200 and the male core portion 3002The thickness of the core is 0.25-0.35 mm, the convex sand core part 300 is prevented from being ejected out, and the wall thickness of the casting is reduced.
In some embodiments, the gap D at the third mating surface 103 between the female core portion 200 and the male core portion 3003The thickness is 0.05-0.15 mm, and the characteristic modeling of the sand core cavity 120 in the sand core main body 100 is ensured not to interfere with the integral splicing.
In some embodiments, the first mating surface 101, the second mating surface 102 of the male core portion 300 meet at a corner R1The corner where the first mating surface 101 and the second mating surface 102 of the female core portion 200 meet is R2，R1、R2Is satisfied by R1＞R2And the gap between the cross-connecting corners is used for containing and retaining the splicing glue.
In some embodiments, referring to FIG. 3, because of the complexity of the casting cavity, the pin placement areas 140 and sand shooting port molding stations 150 are provided on the convex non-casting cavity faces 130 of the externally convex core portions 300, corresponding to pin and sand shooting port locations, to avoid sand run-out.
In some embodiments, the wall thickness T at the non-casting cavity face of male core portion 3001Not less than 15mm, and ensures the structural strength.
In some embodiments, the wall thickness T at the non-casting-face cavity surface of the female core portion 200 is greater than or equal to 15mm, and the root radius R of the non-casting-face cavity of the female core portion 200 is greater than or equal to 5mm, ensuring impact resistance.
The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a be applied to psammitolite structure of low pressure casting cavity sub vehicle frame which characterized in that: the sand core comprises a sand core main body (100), wherein the outer side surface of the sand core main body (100) is used as a casting cavity surface (110) to be molded corresponding to the inner cavity surface of the auxiliary frame casting;
the sand core main body (100) comprises a concave sand core part (200) and a convex sand core part (300), the convex sand core part (300) is spliced on the concave sand core part (200), and the convex sand core part (300) is molded corresponding to the position of the auxiliary frame casting;
a sand core cavity (120) is arranged between the concave sand core part (200) and the convex sand core part (300), and the surface of the sand core cavity (120) is used as a non-casting cavity surface (130).
2. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 1, wherein: a first matching surface (101), a second matching surface (102) and a third matching surface (103) are sequentially arranged between the concave sand core part (200) and the convex sand core part (300) from outside to inside, a step shape is formed among the first matching surface (101), the second matching surface (102) and the third matching surface (103), the first matching surface (101) and the third matching surface (103) are vertical surfaces, and the second matching surface (102) is a transverse surface.
3. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 2, wherein: a gap D at the first mating surface (101) between the female core portion (200) and the male core portion (300)10 to 0.20 mm.
4. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 2, wherein: the spacing between the female core portion (200) and the male core portion (300) at the second mating surface (102)Gap D20.25 to 0.35 mm.
5. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 2, wherein: a gap D at the third mating surface (103) between the female sand core portion (200) and the male sand core portion (300)30.05-0.15 mm.
6. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 2, wherein: the intersection corner of the first matching surface (101) and the second matching surface (102) of the convex sand core part (300) is R1The intersection corner of the first matching surface (101) and the second matching surface (102) of the concave sand core part (200) is R2Said R is1The R is2Is satisfied by R1＞R2。
7. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 1, wherein: the wall thickness T at the non-casting cavity surface of the convex sand core part (300)1≥15mm。
8. The sand core structure applied to the low-pressure casting hollow auxiliary frame as claimed in claim 1, wherein: the wall thickness T of the non-casting cavity surface of the concave sand core part (200) is more than or equal to 15mm, and the root fillet R of the non-casting cavity surface of the concave sand core part (200) is more than or equal to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122589943.0U CN216370118U (en) | 2021-10-26 | 2021-10-26 | Sand core structure applied to low-pressure casting hollow auxiliary frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122589943.0U CN216370118U (en) | 2021-10-26 | 2021-10-26 | Sand core structure applied to low-pressure casting hollow auxiliary frame |
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| Publication Number | Publication Date |
|---|---|
| CN216370118U true CN216370118U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122589943.0U Active CN216370118U (en) | 2021-10-26 | 2021-10-26 | Sand core structure applied to low-pressure casting hollow auxiliary frame |
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| Country | Link |
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| CN (1) | CN216370118U (en) |
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2021
- 2021-10-26 CN CN202122589943.0U patent/CN216370118U/en active Active
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