A forming mechanism for a centrifugal composite roller

Abstract

This utility model relates to the field of roll manufacturing technology and discloses a forming mechanism for a centrifugal composite roll, including a cold mold and end caps. The cold mold has a through cavity structure along its axial direction, and support structures are provided at both ends of the cavity structure. End caps can be detachably installed at both ends of the cold mold, and the end caps abut against the corresponding support structures. One end of the end cap near the middle of the cold mold is the first end, and the other end is the second end. The end cap has a through channel along its axial direction, and the diameter of the channel gradually decreases from the first end to the second end, so that the inner surface of the end cap forms a slope. During the centrifugal casting of the working layer, the molten iron level is controlled at the slope position, so that the slag can be smoothly attached to the slope. When the core is filled and cast, the slag is smoothly floated to the riser with the molten iron, thereby eliminating defects such as pores and slag holes at the junction of the working layer and the core.

Description

Technical Field

[0001] This utility model relates to the field of roll manufacturing technology, and in particular to a forming mechanism for a centrifugal composite roll. Background Technology

[0002] Centrifugal composite rolls consist of an outer layer (working layer) and a core. The outer layer is an alloy layer, formed by pouring molten iron into a cold mold, followed by cooling and solidification of the molten iron through a centrifuge. The core is formed by pouring molten iron directly into a tooling after cold mold assembly. Existing centrifugal composite roll forming mechanisms produce centrifugal composite rolls with defects such as porosity and slag inclusions at the junction of the outer layer and core. These defects are mainly caused by excessive gas generation during production, inadequate slag control, and failure to completely expel slag during the rising process of the molten iron filling the core, resulting in porosity and slag inclusions in the centrifugal roll. Therefore, there is an urgent need to design a centrifugal composite roll forming mechanism to solve these problems. Utility Model Content

[0003] The purpose of this invention is to propose a forming mechanism for centrifugal composite rolls, which solves the technical problem of defects such as air holes and slag holes appearing at the joint position of the working layer and the core of the centrifugal composite rolls produced by the forming mechanism of existing centrifugal composite rolls.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides a forming mechanism for a centrifugal composite roll, comprising:

[0006] A cold-formed mold, wherein a through cavity structure is provided along its axial direction, and a support structure is provided at both ends of the cavity structure;

[0007] End caps are detachably installed at both ends of the cooling type. The end caps abut against the corresponding support structure. One end of the end cap near the middle of the cooling type is the first end, and the other end is the second end. The end cap is provided with a through channel along its axial direction. The diameter of the channel gradually decreases from the first end toward the second end to form a slope.

[0008] The forming structure of this centrifugal composite roll has end caps that can be detachably installed at both ends of the cold mold. The end caps abut against the corresponding support structure inside the cold mold. The diameter of the channel along the axial direction of the end cap gradually decreases from the first end to the second end to form a slope. During the centrifugal casting of the working layer, the molten iron level is controlled at the slope position so that the slag can be smoothly attached to the slope. When the core is filled and cast, the slag smoothly floats to the riser with the molten iron, thereby eliminating defects such as pores and slag holes at the junction of the working layer and the core.

[0009] As a preferred embodiment of the forming mechanism of the aforementioned centrifugal composite roll, the support structure is a stepped structure disposed at both ends of the cavity structure.

[0010] The support structure is a stepped structure set at both ends of the cavity structure. This structure is simple and easy to manufacture. The stepped structure can support and limit the end cap.

[0011] As a preferred embodiment of the forming mechanism of the aforementioned centrifugal composite roll, the end cap includes:

[0012] End cap body, wherein the end cap body is provided with a through hole along its axial direction;

[0013] A molding sand structure is disposed within the through hole, and the channel is provided along its axial direction. Both the end cap body and the molding sand structure abut against the corresponding support structure.

[0014] The end cap includes the end cap body and the molding sand structure, which prevents the end cap body from sticking to the cast workpiece.

[0015] As a preferred embodiment of the forming mechanism of the aforementioned centrifugal composite roll, the end cap body includes:

[0016] A first connecting portion, wherein the through hole is provided inside the first connecting portion, and the diameter of the through hole gradually decreases from the first end to the second end;

[0017] The second connecting part protrudes from one end of the first connecting part near the middle of the cold mold;

[0018] The third connecting part is disposed at the end of the second connecting part that is not connected to the first connecting part. The third connecting part can abut against the support structure, and a limiting space is formed between the third connecting part and the second connecting part.

[0019] The aforementioned end cap body has a simple structure and can seal the cavity structure.

[0020] As a preferred embodiment of the forming mechanism of the aforementioned centrifugal composite roll, the molding sand structure includes:

[0021] A molding sand body, wherein the channel is provided inside the molding sand body, and the molding sand body has a conical structure;

[0022] A support portion is provided at one end of the molding sand body near the middle of the cold mold. The support portion is able to abut against the support structure and is confined within the limiting space.

[0023] The molding sand body of the molding sand structure is a conical structure, which is simple and easy to prepare. The support part can abut against the support structure and be confined within the confined space. The contact area between the molding sand structure and the end cap body is large, and the adhesion is good. Moreover, the molding sand structure abuts against the support structure, which plays a role in confining the molding sand structure.

[0024] As a preferred embodiment of the forming mechanism of the above-mentioned centrifugal composite roll, both ends of the cold mold are provided with assembly holes, which are connected to the cavity structure.

[0025] The installation holes facilitate the assembly of the molding mechanism with other mechanisms.

[0026] As a preferred embodiment of the forming mechanism of the aforementioned centrifugal composite roll, at least two assembly holes are provided at both ends of the cold-formed roll.

[0027] The cold-type has at least two mounting holes at both ends to enhance the connection points with other mechanisms and strengthen the connection.

[0028] As a preferred embodiment of the forming mechanism of the above-mentioned centrifugal composite roll, the end face of the second connecting part near the end of the first connecting part is located on the side of the assembly hole near the middle of the cold mold.

[0029] The above arrangement avoids the second connecting part from interfering with the connecting parts that extend into the assembly hole.

[0030] As a preferred embodiment of the forming mechanism of the above-mentioned centrifugal composite roll, the end face of the second connecting part near the first connecting part is an inclined surface, and the diameter of the inclined surface gradually decreases from the end connected to the third connecting part toward the end connected to the first connecting part.

[0031] One end of the inclined surface near the middle of the cold mold is located on the side of the mounting hole near the middle of the cold mold; and the projection of the mounting hole along its axial direction at least partially falls on the inclined surface.

[0032] The above configuration allows the connector extending into the assembly hole to rest against the inclined surface, causing the connector to be tilted away from the axis of the assembly hole, thereby avoiding the technical problem of failure to lock due to assembly errors between the assembly hole and the connector.

[0033] The beneficial effects of this utility model are:

[0034] The centrifugal composite roll forming mechanism proposed in this utility model has end caps that can be detachably installed at both ends of the cold mold. The end caps abut against the corresponding support structure inside the cold mold. The diameter of the channel along the axial direction of the end cap gradually decreases from the first end to the second end, that is, the channel of the end cap has an incline. During the centrifugal casting of the working layer, the molten iron level is controlled at the sloping position, so that the slag can be smoothly attached to the sloping position. When the core is filled and cast, the slag smoothly floats to the riser with the molten iron, thereby eliminating defects such as air holes and slag holes at the junction of the working layer and the core. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the forming mechanism of the centrifugal composite roll provided by this utility model;

[0036] Figure 2 This is a cross-sectional view of the end cap provided by this utility model before assembly.

[0037] In the picture:

[0038] 1. Cold forming; 11. Cavity structure; 12. Support structure; 13. Mounting port; 14. Assembly hole;

[0039] 2. End cap;

[0040] 21. End cap body; 210. Through hole; 211. First connecting part; 212. Second connecting part; 2120. Inclined surface; 213. Third connecting part; 214. Limiting space;

[0041] 22. Molding sand structure; 221. Molding sand body; 222. Support; 220. Channel; 2201. Slope. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] like Figure 1 As shown, this embodiment provides a forming mechanism for a centrifugal composite roll, including a cold mold 1 and an end cap 2. The cold mold 1 has a through cavity structure 11 along its axial direction, and support structures 12 are provided at both ends of the cavity structure 11. The end cap 2 can be detachably installed at both ends of the cold mold 1. The end cap 2 abuts against the corresponding support structure 12. One end of the end cap 2 near the middle of the cold mold 1 is the first end, and the other end is the second end. The end cap 2 has a through channel 220 along its axial direction. The diameter of the channel 220 gradually decreases from the first end to the second end, so that the inner surface of the end cap 2 forms a slope 2201. During the centrifugal casting of the working layer, the molten iron level is controlled at the position of the slope 2201, so that the slag can be smoothly attached to the slope 2201. When the core is filled and cast, the slag smoothly floats to the riser with the molten iron, thereby eliminating the problems of porosity and slag holes at the junction of the working layer and the core.

[0047] Specifically, the cavity structure 11 of the cold mold 1 is a circular through-hole structure. The cold mold 1 has mounting ports 13 at both ends. The end cap 2 is installed at the mounting ports 13. The inner diameter of the mounting ports 13 is smaller than the inner diameter of the cavity structure 11, so that the step structure formed between the mounting ports 13 and the cavity is a support structure 12. The support structure 12 has a simple structure and is easy to manufacture. The step structure can support and limit the end cap 2.

[0048] Optionally, the inner diameter of the first end of channel 220 is smaller than the inner diameter of cold type 1, so that the centrifugal composite roll formed is thicker in the middle and thinner at both ends.

[0049] like Figure 2As shown, the end cap 2 includes an end cap body 21 and a molding sand structure 22. The end cap body 21 serves to shape the molding sand structure 22. The end cap body 21 has a through hole 210 along its axial direction. The molding sand structure 22 is disposed within the through hole 210 and has a channel 220 along its axial direction. Both the end cap body 21 and the molding sand structure 22 abut against the corresponding support structure 12. The end cap body 21 can avoid sticking to the cast workpiece through the molding sand structure 22.

[0050] Furthermore, the end cap body 21 includes a first connecting portion 211, a second connecting portion 212, and a third connecting portion 213. The first connecting portion 211 has an annular structure and a through hole 210 inside. The diameter of the through hole 210 gradually decreases from the first end to the second end. The outer surface of the first connecting portion 211 is circular, and the inner surface of the first connecting portion 211 gradually slopes towards the axis of the first connecting portion 211 from the first end to the second end, i.e., the inner surface of the first connecting portion 211 has a sloping structure. The second connecting portion 212 protrudes from the end of the first connecting portion 211 near the middle of the cold mold 1. The third connecting portion 213 is located at the end of the second connecting portion 212 that is not connected to the first connecting portion 211. The third connecting portion 213 can abut against the support structure 12. The third connecting portion 213 has an annular structure, and a limiting space 214 is formed between the third connecting portion 213 and the second connecting portion 212. The end cap body 21 has a simple structure and can seal the cavity structure 11.

[0051] like Figure 2 As shown, the molding sand structure 22 includes a molding sand body 221 and a support part 222. The molding sand body 221 has a conical structure, and the aforementioned channel 220 is formed inside the molding sand body 221. The support part 222 is disposed at one end of the molding sand body 221 near the middle of the cold mold 1. The support part 222 can abut against the support structure 12 and is confined within the limiting space 214. The molding sand body 221 of the molding sand structure 22 has a conical structure, which is simple in structure and easy to manufacture. The support part 222 can abut against the support structure 12 and is confined within the limiting space 214. The contact area between the molding sand structure 22 and the end cap body 21 is large, resulting in good adhesion. Moreover, the molding sand structure 22 abuts against the support structure 12, which serves to limit the molding sand structure 22.

[0052] Optionally, both ends of the cold mold 1 are provided with assembly holes 14, which are connected to the cavity structure 11. The assembly holes 14 facilitate the assembly of the molding mechanism with other mechanisms. In this embodiment, the assembly hole 14 at the bottom end of the cold mold 1 is used to install the bottom box, and the assembly hole 14 at the top end is used to install the riser.

[0053] Preferably, at least two mounting holes 14 are provided at both ends of the cold-form 1, thereby enhancing the connection points with other mechanisms and increasing the connection strength. The mounting holes 14 at either end of the cold-form 1 are equally spaced along the circumference of the cold-form 1. There may be two, three or more mounting holes 14 at either end of the cold-form 1, which is not specifically limited here.

[0054] In some embodiments, the end face of the second connecting portion 212 near the first connecting portion 211 is located on one side of the assembly hole 14 near the middle of the cold mold 1, thereby avoiding interference between the second connecting portion 212 and the connector extending into the assembly hole 14. In this case, the end face of the second connecting portion 212 near the first connecting portion 211 can be a slope, a plane, or an irregular curved surface, etc.

[0055] In other embodiments, the end face of the second connecting portion 212 near the first connecting portion 211 is an inclined surface 2120, the diameter of which gradually decreases from the end connected to the third connecting portion 213 toward the end connected to the first connecting portion 211; the end of the inclined surface 2120 near the middle of the cold mold 1 is located on the side of the mounting hole 14 near the middle of the cold mold 1; and the projection of the mounting hole 14 along its axial direction at least partially falls on the inclined surface 2120. This arrangement allows the connector extending into the mounting hole 14 to abut against the inclined surface 2120, causing the axis of the connector to deviate from the axis of the mounting hole 14 and be inclined, thereby securing the connector within the mounting hole 14 and avoiding the technical problem of inability to lock due to assembly errors between the mounting hole 14 and the connector.

[0056] Preparation process of centrifugal composite rolls:

[0057] Install end caps 2 on both ends of the cold mold 1. The assembled forming mechanism is rotated and set on the centrifuge. The axis of the cold mold 1 is set horizontally. Molten iron is poured into the channel 220 at one end of the cold mold 1. The liquid level of the molten iron reaches the slope 2201 of the channel 220, so that the slag can be smoothly attached to the slope 2201.

[0058] The centrifuge rotates, causing the cooling mechanism 1 to rotate around its axis to form a working layer.

[0059] The forming mechanism is fitted with a mold, placed vertically, with its bottom installed in the bottom box and a riser installed at the top. Molten iron is poured through the riser, and the slag floats smoothly to the riser along with the molten iron.

[0060] It should be noted that the riser has a certain allowance. The defect can be eliminated by removing the allowance during processing.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A forming mechanism for a centrifugal composite roll, characterized in that, include: A cold type (1) is provided with a through cavity structure (11) along its axial direction, and a support structure (12) is provided at both ends of the cavity structure (11). End caps (2) are detachably installed at both ends of the cooling type (1). The end caps (2) abut against the corresponding support structure (12). One end of the end cap (2) near the middle of the cooling type (1) is the first end, and the other end is the second end. The end cap (2) is provided with a through channel (220) along its axial direction. The diameter of the channel (220) gradually decreases from the first end to the second end, so that the inner surface of the end cap (2) forms a slope (2201).

2. The forming mechanism of a centrifugal compounding roller according to claim 1, wherein The support structure (12) is a stepped structure located at both ends of the cavity structure (11).

3. The forming mechanism of the centrifugal composite roll according to claim 1, characterized in that, The end cap (2) includes: End cap body (21), wherein the end cap body (21) is provided with a through hole (210) along its axial direction; A molding sand structure (22) is disposed in the through hole (210), and the molding sand structure (22) is provided with the channel (220) along its axial direction. The end cap body (21) and the molding sand structure (22) both abut against the corresponding support structure (12).

4. The forming mechanism of a centrifugal compocasting roll according to claim 3, wherein The end cap body (21) includes: A first connecting portion (211) is provided inside the first connecting portion (211), and the diameter of the through hole (210) gradually decreases from the first end to the second end; The second connecting part (212) protrudes from one end of the first connecting part (211) near the middle of the cold type (1); The third connecting part (213) is disposed at the end of the second connecting part (212) that is not connected to the first connecting part (211). The third connecting part (213) can abut against the support structure (12). A limiting space (214) is formed between the third connecting part (213) and the second connecting part (212).

5. The forming mechanism of a centrifugal compocasting roll according to claim 4, wherein The molding sand structure (22) includes: A molding sand body (221) is provided with the channel (220) inside the molding sand body (221), and the molding sand body (221) has a conical structure; The support part (222) is disposed at one end of the molding sand body (221) near the middle of the cold mold (1). The support part (222) can abut against the support structure (12) and is confined within the limiting space (214).

6. The forming mechanism of a centrifugal compocasting roll according to claim 4, wherein Both ends of the cold mold (1) are provided with assembly holes (14), and the assembly holes (14) are connected to the cavity structure (11).

7. The forming mechanism of a centrifugal compocasting roll according to claim 6, wherein At least two assembly holes (14) are provided at both ends of the cold type (1).

8. The forming mechanism of a centrifugal compocasting roll according to claim 6, wherein The end face of the second connecting part (212) near the end of the first connecting part (211) is located on one side of the assembly hole (14) near the middle of the cold type (1).

9. The forming mechanism of the centrifugal composite roll according to claim 6, characterized in that, The end face of the second connecting part (212) near the first connecting part (211) is an inclined surface (2120), and the diameter of the inclined surface (2120) gradually decreases from the end connected to the third connecting part (213) toward the end connected to the first connecting part (211). One end of the inclined surface (2120) near the middle of the cold mold (1) is located on the side of the mounting hole (14) near the middle of the cold mold (1); and the projection of the mounting hole (14) along its axial direction at least partially falls on the inclined surface (2120).

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