Continuous casting roller and manufacturing method thereof

Abstract

The invention discloses a continuous casting roller which comprises a roller body, the roller body is provided with a first end and a second end, and a groove extending from the first end to the second end is formed in the surface of the roller body; the sealing plate covers the opening side of the groove, the sealing plate and the groove form a liquid channel, and the sealing plate can prevent liquid from overflowing from the opening side of the groove; and the surfacing layer covers the outer side of the circumference of the roller body, and the surfacing layer covers the sealing plate. The invention further discloses a method for manufacturing the continuous casting roller. According to the continuous casting roller, the sealing plates are welded to the opening sides of the grooves in the surface of the roller body, the sealing plates and the grooves form liquid flow channels, liquid can be prevented from overflowing from the opening sides of the grooves, and the situation that in a traditional scheme, an outer roller sleeve and an inner roller are in interference fit to form the flow channels is replaced; and roller scrapping caused by an included angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting roller manufacturing, in particular to a continuous casting roller and a manufacturing method thereof. Background Art

[0002] During the continuous casting process of the continuous casting machine, the rollers of the fan-shaped segments are in direct contact with the high-temperature ingot. The cooling and protection effect of the rollers themselves directly affects the service life of the rollers, and also affects the efficiency of the continuous casting machine production operation. The cooling effect of the rollers themselves is mainly reflected in the following two aspects: on the one hand, the sealing of the roller cooling water circuit; on the other hand, the distance of the roller cooling water close to the roller surface.

[0003] At present, there are many cooling methods for segmented integral rollers, including center hole water cooling, multi-channel close-packed straight hole water cooling near the roller surface, and spiral water cooling. It is understandable that the closer the roller cooling water is to the roller surface, the better the cooling effect of the roller and the longer the service life. Therefore, the cooling effect of close-packed straight hole water cooling and spiral water cooling is better. However, due to the many manufacturing processes, high difficulty and high cost of rollers with close-packed straight hole water cooling, users are generally less willing to use it in the severe market environment. This makes spiral water cooling the first choice for users. The spiral water cooling in the prior art is to set a spiral groove on the surface of the inner roller, set the outer roller sleeve outside the inner roller, and achieve the sealing of the spiral groove through the interference fit of the inner roller and the outer roller sleeve. The roller using this process requires the inner roller and the outer roller sleeve to be relatively parallel during hot assembly or cold assembly. If the inner roller and the outer roller sleeve are distorted during the installation process, the inner roller or the outer roller sleeve is easily scrapped during the restoration process. Summary of the invention

[0004] In order to overcome the defects in the prior art, the present invention provides a continuous casting roller and a manufacturing method thereof, wherein a sealing plate is welded to the open side of a groove on the surface of a roller body, and the sealing plate and the groove form a flow channel for the liquid, thereby preventing the liquid from overflowing from the open side of the groove, thereby replacing the traditional solution of using an interference fit between an outer roller sleeve and an inner roller to form the flow channel, thereby avoiding the scrapping of the roller due to the angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a continuous casting roll, comprising:

[0006] A roller body, the roller body having a first end and a second end, and a surface of the roller body being provided with a groove extending from the first end to the second end;

[0007] A sealing plate, the sealing plate covers the opening side of the groove, a liquid flow channel is formed between the sealing plate and the groove, and the sealing plate can prevent the liquid from overflowing from the opening side of the groove;

[0008] A surfacing layer covers the circumferential outer side of the roller body, and the surfacing layer covers the sealing plate.

[0009] Through the above technical solution, the sealing plate is welded to the open side of the groove on the surface of the roller body, and a liquid flow channel is formed between the sealing plate and the groove, which can prevent the liquid from overflowing from the open side of the groove. This replaces the traditional solution of using an interference fit between the outer roller sleeve and the inner roller to form the flow channel, and avoids the scrapping of the roller due to the angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly.

[0010] Furthermore, the groove includes a spiral groove extending spirally from the first end toward the second end and along the circumferential direction of the roller body. The area of ​​the spiral groove accounts for a large proportion of the surface of the roller body, which is conducive to the coolant fully contacting the surface of the roller body and enhancing the cooling effect.

[0011] Furthermore, the grooves include a plurality of linear grooves arranged at intervals along the circumference of the roller body. The linear grooves are easy to process and are beneficial to improving the production and processing efficiency of the continuous casting roller.

[0012] Furthermore, a groove is provided on the side of the side wall of the groove away from the roller body, and the sealing plate is connected to the groove. The groove refers to a groove of a certain geometric shape processed and assembled at the part to be welded of the weldment, and the groove is used to ensure the welding quality.

[0013] Furthermore, a support portion is provided on the bottom surface of the groove, and the support portion extends from the bottom surface toward the opening side to be flush with the groove, and the sealing plate abuts against the support portion. The support portion is used to support the sealing plate to prevent the sealing plate from sinking into the groove and affecting the circulation of the coolant.

[0014] Furthermore, channels extending into the roller body are provided at both ends of the roller body, and the channels are connected to the flow channel. Cooling liquid is injected into the spiral groove through the channel at one end of the roller body and flows out from the channel at the other end of the roller body.

[0015] Furthermore, the roller body protrudes outwards at both ends of its axial direction to form a connecting shaft, the outer diameter of the connecting shaft is smaller than the roller body, and the channel extends from the end surface of the connecting shaft into the roller body. The connecting shaft can be used to install the roller body on an external device, and can also seal and connect two roller bodies through a sleeve.

[0016] Further, at least two roller bodies are included, each of which is arranged in series, the connecting shafts of two adjacent roller bodies are connected by a sleeve, and the channels of the two adjacent roller bodies are connected. According to actual conditions, a corresponding number of roller bodies can be selected to be connected in series through sleeves to form a segmented integral roller.

[0017] A method for manufacturing a continuous casting roller, used for manufacturing the above-mentioned continuous casting roller, comprises the following steps:

[0018] A groove is formed on the surface of the roller body, and a groove is formed on a side of the side wall of the groove away from the roller body;

[0019] A sealing plate is connected along the groove, a liquid flow channel is formed between the sealing plate and the groove, and the sealing plate can prevent the liquid from overflowing from the opening side of the groove;

[0020] Clean the welding position of the sealing plate, and perform surfacing welding on the circumferential surface of the roller body for 3 to 5 times to form a surfacing layer;

[0021] Annealing the roller body to relieve stress;

[0022] The surfacing layer is polished to make its surface smooth.

[0023] Further, the step of connecting the sealing plate along the groove includes:

[0024] Before connecting the sealing plate, the debris in the spiral groove is cleaned, and the sealing plate is welded at the groove by spot welding;

[0025] The step is to build up the circumferential surface of the roller body for 3 to 5 times. Before each build up, the build up layer formed last time needs to be completely cooled and shaped.

[0026] Furthermore, it also includes coating a protective layer on the surface of the roller body and the cladding layer with anti-rust oil.

[0027] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0028] 1. In the present application, the sealing plate is welded to the opening side of the groove on the surface of the roller body. The sealing plate and the groove form a flow channel for the liquid, which can prevent the liquid from overflowing from the opening side of the groove. This replaces the traditional solution of using the interference fit between the outer roller sleeve and the inner roller to form the flow channel, and avoids the scrapping of the roller due to the angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly;

[0029] 2. The present application performs multiple surfacing welding on the roller body and the sealing plate surface to form a surfacing layer covering the sealing plate. The surface of the surfacing layer is polished smooth for contacting the items to be transported. The surfacing layer can protect the roller body.

[0030] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 1 is a schematic diagram of the overall structure of the continuous casting roller in an embodiment of the present invention;

[0033] Figure 2 is a schematic structural diagram of a roller body in an embodiment of the present invention;

[0034] Figure 3 is a schematic structural diagram of a connecting shaft connection in an embodiment of the present invention;

[0035] Figure 4 is an axial cross-sectional view of a roller body in an embodiment of the present invention;

[0036] Figure 5 is a radial cross-sectional view of two end faces CC and UU of the roller body in an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the internal structure of the spiral groove in an embodiment of the present invention.

[0038] The figure numerals of the above drawings are: 1, roller body; 11, connecting shaft; 111, channel; 1111, connecting channel; 12, sleeve; 13, spiral groove; 131, groove; 132, support part; 2, sealing plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] Combination Figure 1-6 As shown, embodiment 1 discloses a continuous casting roller, comprising:

[0042] Three roller bodies 1 are arranged in series, and each roller body 1 protrudes outward along both ends of its axial direction to form a connecting shaft 11, and the end surface of the connecting shaft 11 is provided with a channel 111 extending into the roller body 1. The connecting shafts 11 of two adjacent roller bodies 1 are sealed and connected by a sleeve 12, and an O-ring or a lip-shaped sealing ring is provided between the connecting shaft 11 and the sleeve 12, and the channels 111 of the two adjacent roller bodies 1 are connected.

[0043] The roller body 1 has a first end and a second end, and a spiral groove 13 is provided on the surface of the roller body 1. The spiral groove 13 extends spirally from the first end toward the second end and along the circumferential direction of the roller body 1. The area of ​​the spiral groove 13 formed in the above scheme accounts for a large proportion of the surface of the roller body 1, which is conducive to the coolant fully contacting the surface of the roller body 1 and enhancing the cooling effect.

[0044] The channel 111 is provided with at least one connecting channel 1111, and the connecting channel 1111 connects the channel 111 and the spiral groove 13. The cooling liquid is injected into the spiral groove 13 through the channel 111 at one end of the roller body 1, and flows out from the channel 111 at the other end of the roller body 1.

[0045] Optionally, each of the channels 111 is provided with a plurality of connecting channels 1111 , and the plurality of connecting channels 1111 are arranged on the peripheral side of the channel 111 along the circumferential direction of the roller body 1 , and the connecting channels 1111 extend along the radial direction of the roller body 1 to connect the channel 111 and the spiral groove 13 .

[0046] A groove 131 is provided on the side of the two side walls of the spiral groove 13 facing away from the roller body 1, and a support portion 132 is provided at the center of the bottom surface of the spiral groove 13, and the support portion 132 extends from the bottom surface to the opening side of the spiral groove 13 until it is flush with the groove 131. The groove 131 refers to a groove of a certain geometric shape that is processed and assembled at the part to be welded of the weldment, and the groove 131 is used to ensure the welding quality. A sealing plate 2 is welded at the groove 131, and the sealing plate 2 covers the opening side of the spiral groove 13, and the sealing plate 2 faces the side of the spiral groove 13 and abuts against the support portion 132. The sealing plate 2 and the spiral groove 13 are combined to form a liquid flow channel for the circulation of coolant, and the sealing plate 2 can prevent the coolant from overflowing from the opening side of the spiral groove 13. The support portion 132 is used to support the sealing plate 2 to prevent the sealing plate 2 from sinking into the spiral groove 13 and affecting the circulation of the coolant.

[0047] The outer surfaces of the roller body 1 and the sealing plate 2 are provided with a 5 mm to 6 mm thick cladding layer 3. The cladding layer 3 is formed by multiple cladding processes. It should be noted that before each cladding process, the cladding layer formed last time needs to be completely cooled and formed. The surface of the cladding layer 3 is polished and smooth, and is used to contact the objects to be transported. The cladding layer 3 can protect the roller body 1.

[0048] The surfaces of the roller body 1 and the surfacing layer 3 are coated with anti-rust oil.

[0049] Optionally, two spiral grooves 3 may be provided on the circumferential surface of the roller body 1 , wherein the flow directions of the coolant in the two spiral grooves 13 are opposite.

[0050] Optionally, the spiral groove 13 may be replaced by a plurality of linear grooves arranged at intervals along the circumference of the roller body 1. The linear grooves are easy to process and are beneficial to improving the production and processing efficiency of the continuous casting roller.

[0051] Embodiment 2 discloses a method for manufacturing a continuous casting roller, which is used to manufacture the continuous casting roller, and comprises the following steps:

[0052] Using a lathe to turn out the roller body 1 and the connecting shafts 11 at the two end surfaces;

[0053] A lathe is used to carve a spiral groove 13 on the circumferential surface of the roller body 1, and a groove 131 is carve on the side of the side wall of the spiral groove 13 away from the roller body 1, and a support portion 132 is carve at the center of the bottom surface of the spiral groove 13;

[0054] Clean the metal chips in the spiral groove 13;

[0055] The sealing plate 2 is welded along the groove 131 by spot welding so that the sealing plate 2 covers the opening side of the spiral groove 13;

[0056] Grinding and cleaning the welding between the sealing plate 2 and the groove 131;

[0057] The circumferential surface of the roller body 1 and the outer surface of the sealing plate 2 are welded 3-5 times. Before each welding, the welded layer formed last time needs to be completely cooled and shaped, and finally a welded layer with a thickness of 6mm to 7mm is formed;

[0058] Annealing the roller body to relieve stress;

[0059] Grinding the surfacing layer to make its surface smooth, the thickness of the surfacing layer after grinding is 5mm to 6mm;

[0060] Fine turning of roller outer diameter, bevel, arc and chamfer;

[0061] Clean, deburr, polish and grind concave surfaces and rounded corners;

[0062] Use anti-rust oil to coat the surface of the continuous casting roller.

[0063] Through the above technical solution, the sealing plate 2 is welded to the open side of the spiral groove 13 on the surface of the roller body 1. The sealing plate 2 and the spiral groove 13 form a flow channel for the liquid, which can prevent the liquid from overflowing from the open side of the spiral groove 13. This replaces the traditional solution of using an interference fit between the outer roller sleeve and the inner roller to form the flow channel, and avoids the scrapping of the roller due to the angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly.

[0064] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A continuous casting roll, characterized in that: include: A roller body, the roller body having a first end and a second end, a surface of the roller body being provided with a groove extending from the first end to the second end; A sealing plate, the sealing plate covers the opening side of the groove, a liquid flow channel is formed between the sealing plate and the groove, and the sealing plate can prevent the liquid from overflowing from the opening side of the groove; A surfacing layer covers the circumferential outer side of the roller body, and the surfacing layer covers the sealing plate.

2. The continuous casting roll according to claim 1, characterized in that: The groove includes a spiral groove spirally extending from the first end toward the second end and along the circumferential direction of the roller body.

3. The continuous casting roll according to claim 2, characterized in that: A groove is provided on a side of the side wall of the groove away from the roller body, and the sealing plate is connected to the groove.

4. The continuous casting roll according to claim 3, characterized in that: A support portion is provided on the bottom surface of the groove, and the support portion extends from the bottom surface toward the opening side to be flush with the groove, and the sealing plate abuts against the support portion.

5. The continuous casting roll according to claim 2 or 3, characterized in that: Both ends of the roller body are provided with channels extending into the roller body, and the channels are communicated with the flow channel.

6. The continuous casting roll according to claim 5, characterized in that: The roller body protrudes outward along both ends of its axial direction to form a connecting shaft, the outer diameter of the connecting shaft is smaller than the roller body, and the channel extends from the end surface of the connecting shaft into the roller body.

7. The continuous casting roll according to claim 6, characterized in that: It comprises at least two roller bodies, each of which is arranged in series, the connecting shafts of two adjacent roller bodies are connected through a shaft sleeve, and the channels of the two adjacent roller bodies are communicated.

8. A method for manufacturing a continuous casting roll, used for manufacturing the continuous casting roll according to any one of claims 1 to 7, characterized in that: The following steps are involved: A groove is formed on the surface of the roller body, and a groove is formed on a side of the side wall of the groove away from the roller body; A sealing plate is connected along the groove, wherein the sealing plate and the groove form a flow channel for the liquid, and the sealing plate can prevent the liquid from overflowing from the opening side of the groove; Clean the welding position of the sealing plate, and perform surfacing welding on the circumferential surface of the roller body for 3 to 5 times to form a surfacing layer; Annealing the roller body to relieve stress; The surfacing layer is polished to make its surface smooth.

9. The method for manufacturing a continuous casting roll according to claim 8, characterized in that: The steps of connecting the sealing plate along the groove include: Before connecting the sealing plate, the debris in the spiral groove is cleaned, and the sealing plate is welded at the groove by spot welding; The step is to build up the circumferential surface of the roller body for 3 to 5 times. Before each build up, the build up layer formed last time needs to be completely cooled and shaped.

10. The method for manufacturing a continuous casting roll according to claim 8, characterized in that: The method also includes coating a protective layer on the surface of the roller body and the surfacing layer with anti-rust oil.

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