A cast core mold for a deformation-resistant railway support

Abstract

The utility model discloses a kind of anti-deformation railway support casting uses melt core mould, belong to railway support manufacturing technical field.The utility model includes lower mould piece and upper mould piece, upper mould piece is installed in the top of lower mould piece, lower mould piece and upper mould piece are opened with cavity in correspondence with one side, the top of lower mould piece is opened with reserved slot, and support framework is embedded and installed in reserved slot, the bottom of upper mould piece is opened with the slot mouth of cooperation support framework, the bottom of upper mould piece is installed with ladder block in two sides.The utility model is formed rigid internal frame structure by the support framework cooperation slot opening of being set, effectively enhance the overall anti-deformation ability of melt core mould, inhibit the dislocation deformation of mould body due to metal liquid impact or thermal expansion in high-temperature casting process, and interlock design of ladder block and ladder groove is formed cooperation when closing mould, improve closing mould precision.

Description

Technical Field

[0001] This utility model relates to the field of railway bearing manufacturing technology, specifically a core mold for casting anti-deformation railway bearings. Background Technology

[0002] As a core component of rail transit infrastructure, the casting quality of railway bearings directly affects the operational safety of trains and the stability of the track structure. The core mold is a crucial tool in the railway bearing casting process, used to form the internal cavity structure of the casting. Traditional core molds typically employ an integral design, relying on the high-temperature strength of a single material to resist the impact of molten metal. However, in the casting of large or complex bearing structures, the continuous scouring of high-temperature molten metal and thermal stress can easily lead to localized deformation of the mold body, thereby affecting the dimensional accuracy of the casting.

[0003] In the existing technology for casting anti-deformation railway bearings, although the integral core mold has a simple structure, the integral mold body is prone to warping due to uneven thermal expansion in high-temperature environments, which leads to misalignment of the mold surface and affects the uniformity of the casting wall thickness. Increasing the wall thickness of the mold body to enhance rigidity increases material costs and may exacerbate internal thermal stress concentration due to delayed heat conduction. Utility Model Content

[0004] The purpose of this invention is to provide a core mold for casting anti-deformation railway bearings. By setting a support skeleton and grooves to form a rigid internal frame structure, it solves the problem of easy deformation during high-temperature casting.

[0005] This utility model is achieved through the following technical solution: This utility model is a core mold for casting anti-deformation railway bearings, including a lower mold and an upper mold. The upper mold is installed on top of the lower mold. Cavities are opened on corresponding sides of both the lower and upper molds. A reserved groove is opened on the top of the lower mold, and a support frame is embedded in the reserved groove. A slot for matching the support frame is opened on the bottom of the upper mold. Step blocks are installed on both sides of the bottom of the upper mold, and step grooves are opened on both sides of the top of the lower mold. The two step blocks are respectively matched in the corresponding step grooves.

[0006] Furthermore, both the lower mold and the upper mold have reinforcing ribs on their outer surfaces, and the reinforcing ribs are annular ribs.

[0007] Furthermore, channels are opened inside the support frame, and cooling pipes are installed in the channels.

[0008] Furthermore, two circular holes are opened on the side of the lower mold part, and both circular holes are connected to the reserved slot. The two ends of the cooling pipe are located in the corresponding circular holes. Heat dissipation holes are opened on both sides of the lower mold part and the upper mold part, and the heat dissipation holes are connected to the reserved slot.

[0009] Furthermore, positioning rods are installed at the four corners of the lower mold, and positioning holes for matching positioning rods are opened at the four corners of the upper mold.

[0010] Furthermore, the upper mold has through holes on both sides, and bolts are fitted into both through holes. The lower mold has threaded holes on both sides, and the bolts are threaded into the threaded holes.

[0011] This utility model has the following beneficial effects: This invention, through the combination of a support frame and grooves, forms a rigid internal frame structure, which effectively enhances the overall deformation resistance of the core mold. During high-temperature casting, it suppresses mold misalignment and deformation caused by molten metal impact or thermal expansion. Furthermore, the interlocking design of the stepped blocks and stepped grooves forms a fit when the mold is closed, improving the mold closing accuracy. This allows the stress to be evenly distributed through the support frame when the core mold is subjected to the impact of high-temperature molten metal, avoiding mold deformation caused by local stress concentration. This ensures the dimensional stability and internal quality of the railway bearing castings and extends the service life of the mold. This invention utilizes an external cooling medium connected to a cooling pipe for circulating cooling, combined with heat dissipation holes to form a highly efficient heat dissipation structure. During the casting process, after the high-temperature molten metal is injected into the cavity, the cooling medium (such as water or compressed air) circulates within the cooling pipe, quickly carrying away the heat from the mold body. This significantly reduces the accumulation of thermal stress in the core mold, thereby reducing the risk of plastic deformation of the mold due to high temperatures, shortening the casting cooling time, and improving production efficiency. At the same time, it avoids the problem of local overheating and deformation caused by uneven heat dissipation in traditional integral core molds, ensuring the consistency of casting quality.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the core mold; Figure 2 This is a structural schematic diagram of the upper module; Figure 3 This is a structural schematic diagram of the lower mold component; Figure 4 This is a structural diagram of the lower mold and the supporting frame.

[0014] In the diagram: 1. Lower mold part; 101. Cavity; 102. Reserved slot; 103. Stepped slot; 104. Round hole; 105. Heat dissipation hole; 106. Threaded hole; 2. Upper mold part; 201. Groove; 202. Positioning hole; 3. Support frame; 301. Channel; 4. Stepped block; 5. Cooling pipe; 6. Reinforcing rib; 7. Positioning rod; 8. Bolt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4 This utility model provides a technical solution: a core mold for casting anti-deformation railway bearings, comprising a lower mold 1 and an upper mold 2. The upper mold 2 is installed on top of the lower mold 1. Cavities 101 are formed on corresponding sides of both the lower mold 1 and the upper mold 2. The lower mold 1 and the upper mold 2 cooperate with each other to form the cavity 101 for casting. A pre-reserved groove 102 is formed on the top of the lower mold 1, and a support frame 3 is embedded in the pre-reserved groove 102. The support frame 3 is made of heat-resistant alloy steel and has a rectangular frame structure. A slot 201 for the support frame 3 is formed on the bottom of the upper mold 2. The support frame 3 is embedded in the pre-reserved groove 102 on the top of the lower mold 1 and cooperates with the slot 201 on the bottom of the upper mold 2 to enhance the overall structure's anti-deformation ability. Step blocks 4 are installed on both sides of the bottom of the upper mold 2. Both sides are provided with stepped grooves 103, and two stepped blocks 4 are respectively fitted into the corresponding stepped grooves 103. When the mold is closed, the stepped blocks 4 are embedded in the stepped grooves 103 to form an interlocking structure, which effectively suppresses misalignment deformation caused by thermal expansion or molten metal impact. When the core mold for railway bearing casting is used, the support frame 3 is embedded into the reserved groove 102 of the lower mold 1 to ensure that it is firmly in place. Then, the groove 201 of the upper mold 2 is aligned with the support frame 3, and the stepped blocks 4 at the bottom are aligned with the stepped grooves 103 of the lower mold 1 to complete the initial mold closing. The interlocking structure of the stepped blocks 4 and the stepped grooves 103 further prevents misalignment of the mold closing surface and ensures the dimensional accuracy of the casting. High-temperature molten metal is injected into the cavity 101 of the core mold. The support frame 3 bears the impact force of the molten metal and disperses the stress through its rigid structure to prevent the mold body from deforming.

[0017] Both the lower mold 1 and the upper mold 2 have reinforcing ribs 6 on their outer surfaces. The reinforcing ribs 6 are annular ribs, which resist mechanical stress during the casting process. The lower mold 1 has positioning rods 7 installed at each of its four corners, and the upper mold 2 has positioning holes 202 at each of its four corners that mate with the positioning rods 7. The positioning rods 7 fit into the positioning holes 202 to ensure accurate alignment during mold closing. The upper mold 2 has through holes on both sides, and bolts 8 fit into each of the two through holes. The lower mold 1 has threaded holes 106 on both sides, and the bolts 8 are threaded into the threaded holes 106. The bolts 8 pass through the through holes and are threaded into the threaded holes 106 of the lower mold 1, thus achieving a stable locking of the upper and lower mold 1 and preventing the mold body from separating due to the impact of molten metal during the casting process. After the initial mold closing, the positioning rods 7 and positioning holes 202 ensure accurate alignment of the upper and lower mold 1. Finally, the bolts 8 are used to lock the mold, forming a stable overall structure.

[0018] A channel 301 is opened inside the support frame 3, and a cooling pipe 5 is installed in the channel 301. Two round holes 104 are opened on the side of the lower mold 1. Both round holes 104 are connected to the reserved groove 102. The two ends of the cooling pipe 5 are located in the corresponding round holes 104. The two ends of the cooling pipe 5 pass through the round holes 104 on the side of the lower mold 1 and are connected to the external cooling medium circulation system to accelerate the heat dissipation of the core mold and reduce the accumulation of thermal stress. Heat dissipation holes 105 are opened on both sides of the lower mold 1 and the upper mold 2. The heat dissipation holes 105 are connected to the reserved groove 102. The heat dissipation holes 105 further enhance the heat dissipation efficiency. After the high temperature molten metal is injected into the cavity 101 of the core mold, the cooling medium (such as water or compressed air) is introduced into the cooling pipe 5 to accelerate the heat dissipation of the mold body and reduce the impact of thermal stress on the mold.

[0019] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A core mold for casting anti-deformation railway bearings, comprising a lower mold (1) and an upper mold (2), wherein the upper mold (2) is mounted on top of the lower mold (1), and cavities (101) are provided on corresponding sides of both the lower mold (1) and the upper mold (2), characterized in that: The lower module (1) has a reserved groove (102) at the top, and a support frame (3) is embedded in the reserved groove (102). The upper module (2) has a slot (201) at the bottom that matches the support frame (3). The upper mold (2) has step blocks (4) installed on both sides of its bottom, and the lower mold (1) has step grooves (103) opened on both sides of its top. The two step blocks (4) are respectively fitted into the corresponding step grooves (103).

2. The core mold for casting anti-deformation railway bearings according to claim 1, characterized in that, The outer surfaces of both the lower mold (1) and the upper mold (2) are provided with reinforcing ribs (6), and the reinforcing ribs (6) are annular ribs.

3. The core mold for casting anti-deformation railway bearings according to claim 1, characterized in that, A channel (301) is opened in the support frame (3), and a cooling pipe (5) is installed in the channel (301).

4. The core mold for casting anti-deformation railway bearings according to claim 3, characterized in that, The lower mold (1) has two round holes (104) on its side, and both round holes (104) are connected to the reserved groove (102). The two ends of the cooling pipe (5) are respectively located in the corresponding round holes (104). The lower mold (1) and the upper mold (2) are provided with heat dissipation holes (105) on both sides, and the heat dissipation holes (105) are connected to the reserved groove (102).

5. The core mold for casting anti-deformation railway bearings according to claim 1, characterized in that, The lower mold (1) is equipped with positioning rods (7) at each of its four corners, and the upper mold (2) is provided with positioning holes (202) at each of its four corners to cooperate with the positioning rods (7).

6. The core mold for casting anti-deformation railway bearings according to claim 5, characterized in that, The upper mold (2) has through holes on both sides, and bolts (8) are fitted in both through holes. The lower mold (1) has threaded holes (106) on both sides, and the bolts (8) are threaded into the threaded holes (106).

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