Core assembly positioning structure for oil duct core and main body core

Abstract

The utility model provides a core assembly positioning structure for an oil duct core and a main body core, which solves the technical problems that gaps among combined sand cores are too large and positioning between the sand cores and a sand mold is not accurate due to the combination mode of part of the oil duct core and the main body core, and the forming part of the oil duct core is connected with a corresponding core groove on the main body core through a core head. The core head comprises a first core head fixedly connected to the first oil duct core forming part and a second core head fixedly connected to the second oil duct core forming part, the core head is a trapezoidal frustum-shaped structural body, and the core groove comprises a first core groove and a second core groove which are formed in the core head of the main body core; according to the utility model, a horizontal plug-in core assembly in the original process scheme is changed into a vertical plug-in core assembly, so that the sand cores are fixed in the horizontal direction, the fit clearance between the sand cores is ensured to meet the standard, and the sand cores and a sand mold are accurately positioned; the core heads of the trapezoidal frustum-shaped structure body are connected with the corresponding core grooves, the core assembly structure of the sand core is tightly matched, glue does not need to be smeared for bonding, and the core assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the core head structure and the core assembling mode of the sand core in the sand casting process, and in particular to an oil channel core and a main body core assembling positioning structure. BACKGROUND

[0002] The sand core is a necessary means for forming the oil channel, the complex inner cavity and the shape, the difficult ejection and other areas in the sand casting, mainly including the molding part and the non-molding part core head; the molding part is the main structure participating in forming the body contour of the casting, and the non-molding part core head is the sand core part extending out of the casting and not contacting the metal, used for cooperating with other sand cores or sand molds, fixing the sand core, making the sand core have an accurate position in the casting mold and being able to withstand the gravity of the sand core and the metal floating force on the sand core during pouring, so as to not be damaged.

[0003] At present, the horizontal insertion and bonding assembling mode is often used for combining the oil channel core and the main body core, and the gap between the sand cores is greatly affected by the sand core precision, the skill level of the operator and other objective factors, and there are problems such as too large gap between the sand cores and inaccurate positioning between the sand core and the sand mold after the sand cores are assembled. Such combined core is easy to cause sand wiping or oil channel core breaking during the mold closing process, and it is difficult to meet the production standard.

[0004] Chinese patent CN218460788U provides a sand core structure of a cylinder elongated oil channel core, and a core support is arranged between the oil channel core and the main body core, the core support includes a middle support rod, one end of the support rod is connected with a support plate for being abutted on the oil channel core, and the other end of the support rod is connected with a buckle for being clamped on the main body core. However, the connection mode of the structure is relatively complex, and the sand core is easy to deform when pouring the iron liquid. SUMMARY

[0005] The utility model aims at solving the technical problems that the present combined mode between the part of the oil channel core and the main body core is easy to cause too large gap between the combined sand cores and inaccurate positioning between the sand core and the sand mold, and provides an oil channel core and main body core assembling positioning structure.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] An oil channel core and main body core assembling positioning structure, the oil channel core includes a first oil channel core and a second oil channel core, the molding parts of the first oil channel core and the second oil channel core are connected with the corresponding core grooves on the main body core through the core heads respectively; and the special feature is that:

[0008] The core head comprises a first core head fixed on a first oil channel core forming part and a second core head fixed on a second oil channel core forming part, and the first core head and the second core head are both trapezoidal frustum structures, the cross section of the trapezoidal frustum structure is trapezoidal, and the side wall is trapezoidal; the trapezoidal frustum structure is fixed in a vertical direction on the first oil channel core or the second oil channel core, and the large end is on the top and the small end is on the bottom; on the cross section, one side of the trapezoidal short side is close to the first oil channel core or the second oil channel core, and the other side of the trapezoidal long side is away from the first oil channel core or the second oil channel core.

[0009] The core groove comprises a first core groove and a second core groove arranged in a vertical direction on the side wall of the main body core, the shape and size of the first core groove are matched with the shape and size of the first core head, and the shape and size of the second core groove are matched with the shape and size of the second core head; the first oil channel core is positioned on the main body core by being inserted into the first core groove through the first core head, and the second oil channel core is positioned on the main body core by being inserted into the second core groove through the second core head.

[0010] Further, the first core head is fixed on the forming part of the first oil channel core through the upper end of the trapezoidal frustum structure.

[0011] The second core head is fixed on the forming part of the second oil channel core through the side wall of the trapezoidal frustum structure.

[0012] Further, on the trapezoidal frustum structure of the first core head, the two edges away from the first oil channel core are both circular arc transitions; on the trapezoidal frustum structure of the second core head, the two edges away from the second oil channel core and the two edges at the connection between the side wall and the forming part of the second oil channel core are all circular arc transitions, so that the phenomenon of a sand core not being solid during core making is avoided.

[0013] Further, the upper end face and the lower end face of the trapezoidal frustum structure are isosceles trapezoids, the upper end face is parallel to and similar to the lower end face; the vertical side wall is located between the shorter bottom edge of the upper end face and the shorter bottom edge of the lower end face; the other three side walls of the trapezoidal frustum structure have a certain slope, which facilitates the demolding operation.

[0014] Further, the position of the core groove on the core head of the main body core is determined by the positional relationship between the oil channel core and the main body core.

[0015] Further, the core groove has openings on the upper end face and the side face of the main body core; when the trapezoidal frustum structure as the core head of the oil channel core is inserted into the corresponding core groove from top to bottom, the upper end face of the main body core is flush with the upper end face of the core head of the oil channel core, and the side face of the main body core with the opening is flush with the vertical side wall of the core head of the oil channel core.

[0016] The utility model discloses the following beneficial effects:

[0017] 1. This utility model provides a positioning structure for oil passage core and main body core assembly, which changes the horizontal insertion type of core assembly in the original process to a vertical insertion type, so that the position of the sand core is fixed in the horizontal direction, ensuring that the fit gap between the sand cores meets the standard and the positioning between the sand core and the sand mold is accurate.

[0018] 2. This utility model provides a core positioning structure for oil passage core and main body core assembly. It adopts a trapezoidal frustum-shaped structure core head connected to the corresponding core groove. The sand core assembly structure fits tightly and does not require adhesive bonding, which improves core assembly efficiency and reduces the phenomenon of incomplete core assembly and inaccurate positioning.

[0019] 3. This utility model provides a core positioning structure for an oil channel core and a main core assembly. The structure is simple, easy to produce, and has a built-in error prevention function. It reduces the difficulty of operation and the intensity of work, enables precise positioning of the sand core, and improves production efficiency and product quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the main core, the first oil passage core, and the second oil passage core combined core of this utility model embodiment.

[0021] Figure 2 This is a schematic diagram of the structure of the first oil passage core in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the second oil passage core in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the main core structure in an embodiment of this utility model.

[0024] Icon labels:

[0025] 1-First oil passage core, 11-First core head, 2-Second oil passage core, 21-Second core head, 3-Main core, 31-First core groove, 32-Second core groove. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] This utility model provides a positioning structure for an oil passage core and a main core assembly, such as... Figures 1-4 As shown, the oil channel core includes a first oil channel core 1 and a second oil channel core 2. The formed parts of the first oil channel core 1 and the second oil channel core 2 are respectively connected to the corresponding core grooves on the main body core 3 through the core head.

[0028] The core head comprises a first core head 11 fixed to the molding part of the first oil channel core 1 and a second core head 21 fixed to the molding part of the second oil channel core 2. Both the first core head 11 and the second core head 21 are trapezoidal frustum structures, the cross section of which is trapezoidal and the side wall of which is trapezoidal. The trapezoidal frustum structure is fixed in a vertical direction to the first oil channel core 1 or the second oil channel core 2, with the large end on top and the small end on the bottom. On the cross section, the side close to the short side of the trapezoid is close to the first oil channel core 1 or the second oil channel core 2, and the side close to the long side of the trapezoid is away from the first oil channel core 1 or the second oil channel core 2.

[0029] The core groove comprises a first core groove 31 and a second core groove 32 arranged on the side wall of the main core 3 in a vertical direction. The first core groove 31 is matched in shape and size with the first core head 11, and the second core groove 32 is matched in shape and size with the second core head 21. The first oil channel core 1 is positioned on the main core 3 by being inserted into the first core groove 31 through the first core head 11, and the second oil channel core 2 is positioned on the main core 3 by being inserted into the second core groove 32 through the second core head 21.

[0030] The first core head 11 is fixed to the molding part of the first oil channel core 1 through the upper end of the trapezoidal frustum structure, and the second core head 21 is fixed to the molding part of the second oil channel core 2 through the side wall of the trapezoidal frustum structure.

[0031] On the trapezoidal frustum structure of the first core head 11, the two edges away from the first oil channel core 1 are both circularly arcuate, and on the trapezoidal frustum structure of the second core head 21, the two edges away from the second oil channel core 2 and the two edges at the connection between the side wall and the molding part of the second oil channel core 2 are all circularly arcuate, so as to avoid the phenomenon of unpractical sand core during core making.

[0032] The upper end face and the lower end face of the trapezoidal frustum structure are isosceles trapezoids, and the upper end face is parallel and similar to the lower end face. The side wall where the shorter bottom edge of the upper end face and the shorter bottom edge of the lower end face are located is a vertical side wall. The other three side walls of the trapezoidal frustum structure have a certain slope, which is convenient for demolding operation.

[0033] The opening position of the core groove on the core head of the main core 3 is determined by the positional relationship between the oil channel core and the main core 3.

[0034] The core groove has openings on the upper end face and the side face of the main core 3. When the trapezoidal frustum structure as the core head of the oil channel core is inserted into the corresponding core groove from top to bottom, the upper end face of the main core 3 is flush with the upper end face of the core head of the oil channel core, and the side face of the main core 3 where the opening is located is flush with the vertical side wall of the core head of the oil channel core.

[0035] The utility model discloses a core assembling device, it includes main body core 3, first core head 11 and second core head 21, and first core head 11 and second core head 21 are inserted into main body core 3 respectively, and it is characterized by the following: first core head 11 and second core head 21 are the same, and it is the same to the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core of the core

Claims

1. An oil channel core and main body core group core positioning structure, the oil channel core comprises a first oil channel core (1) and a second oil channel core (2), the forming parts of the first oil channel core (1) and the second oil channel core (2) are connected with the corresponding core grooves on the main body core (3) through the core heads respectively; characterized in that: the core head comprises a first core head (11) fixed on the forming part of the first oil channel core (1) and a second core head (21) fixed on the forming part of the second oil channel core (2), the first core head (11) and the second core head (21) are both trapezoidal frustum structures, the cross section of the trapezoidal frustum structure is trapezoidal and the side wall is trapezoidal; the trapezoidal frustum structure is fixed vertically on the first oil channel core (1) or the second oil channel core (2), and the large end is on the top and the small end is on the bottom, the side near the trapezoidal short side on the cross section is close to the first oil channel core (1) or the second oil channel core (2) and the side near the trapezoidal long side is away from the first oil channel core (1) or the second oil channel core (2); the core groove comprises a first core groove (31) and a second core groove (32) arranged vertically on the side wall of the main body core (3), the shape and size of the first core groove (31) are matched with the first core head (11), the shape and size of the second core groove (32) are matched with the second core head (21), the first oil channel core (1) is positioned on the main body core (3) by being inserted into the first core groove (31) through the first core head (11), and the second oil channel core (2) is positioned on the main body core (3) by being inserted into the second core groove (32) through the second core head (21).

2. The oil channel core and main body core group core positioning structure according to claim 1, characterized in that: the first core head (11) is fixed on the forming part of the first oil channel core (1) through the upper end of the trapezoidal frustum structure; the second core head (21) is fixed on the forming part of the second oil channel core (2) through the side wall of the trapezoidal frustum structure.

3. The oil channel core and main body core group core positioning structure according to claim 2, characterized in that: on the trapezoidal frustum structure of the first core head (11), the two edges away from the first oil channel core (1) are both circular arc transitions; on the trapezoidal frustum structure of the second core head (21), the two edges away from the second oil channel core (2) and the two edges of the second oil channel core (2) forming part connection are both circular arc transitions.

4. The oil channel core and main body core group core positioning structure according to claim 3, characterized in that: the upper end face and the lower end face of the trapezoidal frustum structure are isosceles trapezoids, the upper end face is parallel and similar to the lower end face; the side wall where the shorter bottom edge of the upper end face and the shorter bottom edge of the lower end face are located is a vertical side wall; the other three side walls of the trapezoidal frustum structure except the vertical side wall have a certain slope.

5. The oil channel core and main body core group core positioning structure according to any one of claims 1-4, characterized in that: the opening position of the core groove on the core head of the main body core (3) is determined by the positional relationship between the oil channel core and the main body core (3).

6. The oil channel core and main body core group core positioning structure according to claim 5, characterized in that: ​ The core groove has openings on the upper end face and the side face of the main core (3), and when the trapezoidal frustum-shaped structure is inserted into the corresponding core groove as a core head of an oil passage core from top to bottom, the upper end face of the main core (3) is flush with the upper end face of the oil passage core core head, and the side face of the main core (3) with the opening is flush with the vertical side wall of the oil passage core core head.

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