Continuous casting roller

Abstract

The utility model 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. 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 liquid flow channels are formed between the sealing plates and the grooves, 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] This utility model relates to the field of continuous casting roll manufacturing technology, specifically a continuous casting roll. Background Technology

[0002] During the continuous casting process in a continuous casting machine, the rollers in the fan-shaped section come into direct contact with the high-temperature billet. The cooling and protection effect of the rollers directly affects their service life and also the efficiency of the continuous casting machine's production. The cooling effect of the rollers is mainly reflected in the following two aspects: one is the sealing of the roller cooling water channel; the other is the distance between the cooling water and the roller surface.

[0003] Currently, there are various cooling methods for segmented integral rollers, including center hole water cooling, multi-channel closely spaced straight hole water cooling near the roller surface, and spiral water cooling. Understandably, the closer the cooling water is to the roller surface, the better the cooling effect and the longer the service life. Therefore, closely spaced straight hole water cooling and spiral water cooling offer better cooling effects. However, due to the numerous manufacturing processes, high difficulty, and high cost of rollers with closely spaced straight hole water cooling, users generally have a low willingness to use it in the current challenging market environment. This makes spiral water cooling the preferred choice for users. In existing spiral water cooling technology, a spiral groove is set on the surface of the inner roller, and an outer roller sleeve is fitted over the inner roller. The spiral groove is sealed through an interference fit between the inner roller and the outer roller sleeve. Rollers using this process require the inner roller and outer roller sleeve to be relatively parallel during hot or cold assembly. If the inner roller and outer roller sleeve are misaligned during installation, either the inner roller or the outer roller sleeve is prone to failure during restoration. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a continuous casting roll in which a sealing plate is welded to the opening side of the groove on the surface of the roll body. The sealing plate and the groove form a liquid flow channel, which can prevent the liquid from overflowing from the opening 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 a flow channel, and avoids the scrapping of the roll caused by the included angle between the inner roller and the outer roller sleeve during hot or cold assembly.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a continuous casting roll, comprising:

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

[0007] A sealing plate covers the opening side of the tank, forming a liquid flow channel between the sealing plate and the tank, and the sealing plate prevents liquid from overflowing from the opening side of the tank;

[0008] A weld overlay that covers the outer circumference of the roller body and covers the sealing plate.

[0009] The above technical solution involves welding the sealing plate to the opening side of the groove on the surface of the roller body. The sealing plate and the groove form a liquid flow channel, which can prevent the liquid from overflowing from the opening 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 a flow channel, and avoids the roller scrapping caused by the included angle between the inner roller and the outer roller sleeve during hot or cold assembly.

[0010] Furthermore, the groove includes a spiral groove extending spirally from the first end toward the second end along the circumference of the roller body. The area of ​​the spiral groove occupies a large proportion of the roller body surface, which is beneficial for the coolant to fully contact the surface of the roller body and enhance the cooling effect.

[0011] Furthermore, the groove includes a plurality of linear grooves arranged at intervals along the circumference of the roller body. The linear grooves facilitate machining and improve the production efficiency of continuous casting rollers.

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

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

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

[0015] Furthermore, the roller body protrudes outward at both ends along its axial direction to form a connecting shaft. The outer diameter of the connecting shaft is smaller than that of the roller body, and the channel extends from the end face of the connecting shaft into the roller body. The connecting shaft can be used to mount the roller body onto an external device, or it can be used to seal and connect two roller bodies together via a bushing.

[0016] Furthermore, the roller assembly includes at least two roller bodies, which are connected in series. The connecting shafts of adjacent roller bodies are connected by bushings, and the channels of adjacent roller bodies are interconnected. A suitable number of roller bodies can be selected and connected in series via bushings to form a segmented integral roller, depending on the actual situation.

[0017] Furthermore, the channel is provided with at least one connecting channel extending radially along the roller body, the connecting channel connecting the channel and the flow path.

[0018] Furthermore, the weld overlay is formed by welding 3 to 5 times on the circumferential surface of the roller body. Before each weld overlay, the weld overlay formed in the previous step must be completely cooled and set.

[0019] Furthermore, the roller body and the surface of the weld overlay are coated with a protective layer.

[0020] Furthermore, it also includes applying a protective layer of rust-preventive oil to the surface of the roller body and the weld overlay.

[0021] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0022] 1. In this 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 liquid flow channel, which can prevent the liquid from overflowing from the opening 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 a flow channel, and avoids the roller scrapping caused by the included angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly.

[0023] 2. This application involves multiple welding processes on the roller body and the surface of the sealing plate to form a weld overlay layer covering the sealing plate. The surface of the weld overlay layer is polished smooth for contact with the items to be conveyed, and the weld overlay layer protects the roller body.

[0024] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall device structure of the continuous casting roller in an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the roller body in an embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram of the connecting shaft connection in an embodiment of this utility model;

[0029] Figure 4This is an axial cross-sectional view of the roller body in an embodiment of this utility model;

[0030] Figure 5 This is a radial cross-sectional view of the two end faces CC and UU of the roller body in this embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the spiral groove in an embodiment of this utility model.

[0032] The reference numerals in the above figures are as follows: 1. Roller body; 11. Connecting shaft; 111. Channel; 1111. Connecting channel; 12. Bushing; 13. Spiral groove; 131. Bevel; 132. Support part; 2. Sealing plate. Detailed Implementation

[0033] 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.

[0034] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] Combination Figure 1-6 As shown, Embodiment 1 discloses a continuous casting roll, comprising:

[0036] Three roller bodies 1 are arranged in series. Each roller body 1 has a connecting shaft 11 protruding outward from both ends along its axial direction. The end face 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 together by bushings 12. An O-ring or lip seal is provided between the connecting shaft 11 and the bushing 12. The channels 111 of two adjacent roller bodies 1 are connected.

[0037] The roller body 1 has a first end and a second end. 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 circumference of the roller body 1. The spiral groove 13 formed by the above scheme has a large area occupying 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.

[0038] The channel 111 is provided with at least one connecting channel 1111, which connects the channel 111 and the spiral groove 13. Coolant is injected into the spiral groove 13 through the channel 111 at one end of the roller body 1 and flows out through the channel 111 at the other end of the roller body 1.

[0039] Optionally, each of the channels 111 is provided with a plurality of connecting channels 1111, the plurality of connecting channels 1111 being arranged along the circumferential direction of the roller body 1 on the periphery of the channel 111, and the connecting channels 1111 extending radially along the roller body 1 to connect the channel 111 and the spiral groove 13.

[0040] The spiral groove 13 has bevels 131 on its two sidewalls facing away from the roller body 1. A support portion 132 is located at the center of the bottom surface of the spiral groove 13, extending from the bottom surface towards the opening side of the spiral groove 13 to be flush with the bevel 131. The bevel 131 is a groove of a specific geometric shape machined and assembled from the weldment's part, used to ensure welding quality. A sealing plate 2 is welded to the bevel 131, covering the opening side of the spiral groove 13, and the side of the sealing plate 2 facing the spiral groove 13 abuts against the support portion 132. The sealing plate 2 and the spiral groove 13 together form a liquid flow channel for coolant circulation, and the sealing plate 2 prevents coolant from overflowing from the opening side of the spiral groove 13. The support portion 132 supports the sealing plate 2, preventing it from sinking into the spiral groove 13 and affecting coolant flow.

[0041] The outer surfaces of the roller body 1 and the sealing plate 2 are provided with a 5mm to 6mm thick weld overlay layer 3. The weld overlay layer 3 is formed through multiple weld overlay processes. It should be noted that before each weld overlay, the previously formed weld overlay layer must be allowed to completely cool and solidify. The surface of the weld overlay layer 3 is polished smooth to contact the items to be conveyed, and the weld overlay layer 3 protects the roller body 1.

[0042] The roller body 1 and the surface of the weld overlay 3 are coated with anti-rust oil.

[0043] Optionally, two spiral grooves 3 may be provided on the circumferential surface of the roller body 1, wherein the coolant flows in opposite directions in the two spiral grooves 13.

[0044] Optionally, the spiral groove 13 can be replaced with multiple linear grooves arranged at intervals along the circumference of the roller body 1. Linear grooves are easier to process and help improve the production efficiency of continuous casting rollers.

[0045] Example 2 discloses a method for manufacturing a continuous casting roll, which includes the following steps:

[0046] The roller body 1 and the connecting shaft 11 at both ends are machined using a lathe.

[0047] A spiral groove 13 is machined on the circumferential surface of the roller body 1 using a lathe, and a bevel 131 is machined on the side wall of the spiral groove 13 away from the roller body 1. A support part 132 is machined at the center of the bottom surface of the spiral groove 13.

[0048] Clean the metal shavings from the spiral groove 13;

[0049] The sealing plate 2 is welded along the bevel 131 using a spot welding process, so that the sealing plate 2 covers the open side of the spiral groove 13;

[0050] Grind and clean the weld between the sealing plate 2 and the bevel 131;

[0051] The outer surface of the sealing plate 2 on the circumferential surface of the roller body 1 is welded 3-5 times. Before each welding, the weld layer formed in the previous welding is completely cooled and shaped, and finally a weld layer with a thickness of 6mm to 7mm is formed.

[0052] The roller body is annealed to relieve stress;

[0053] Grind the weld overlay to make its surface smooth, and the thickness of the weld overlay after grinding is 5mm to 6mm;

[0054] Precision machining of the roller's outer diameter, bevel, arc, and chamfer;

[0055] Clean, deburr, polish, and grind concave and rounded areas;

[0056] Apply rust-preventive oil to the surface of the continuous casting roll.

[0057] Through the above technical solution, the sealing plate 2 is welded to the opening 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 liquid flow channel, which can prevent the liquid from overflowing from the opening 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 a flow channel, and avoids the roller scrapping caused by the included angle between the inner roller and the outer roller sleeve during hot assembly or cold assembly.

[0058] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A continuous casting roll, characterized in that, include: A roller body having a first end and a second end, and a groove extending from the first end to the second end is provided on the surface of the roller body. A sealing plate covers the opening side of the tank, forming a liquid flow channel between the sealing plate and the tank, and the sealing plate prevents liquid from overflowing from the opening side of the tank; A weld overlay covering the outer circumference of the roller body and covering the sealing plate; The groove includes a spiral groove that extends spirally from the first end toward the second end and along the circumferential direction of the roller body. The sidewall of the groove is provided with a bevel on the side opposite to the roller body, and the sealing plate is connected to the bevel. The bottom surface of the groove is provided with a support portion, which extends from the bottom surface toward the opening side to be flush with the bevel, and the sealing plate abuts against the support portion.

2. The continuous casting roll as described in claim 1, characterized in that, The roller body has channels extending into the roller body at both ends, and the channels are connected to the flow channel.

3. The continuous casting roll as described in claim 2, characterized in that, The roller body protrudes outward at both ends along its axial direction to form a connecting shaft. The outer diameter of the connecting shaft is smaller than that of the roller body. The channel extends from the end face of the connecting shaft into the roller body.

4. The continuous casting roll as described in claim 3, characterized in that, It includes at least two roller bodies, each roller body is arranged in series, the connecting shafts of two adjacent roller bodies are connected by bushings, and the channels of two adjacent roller bodies are connected.

5. The continuous casting roll as described in claim 3, characterized in that, The channel is provided with at least one connecting channel extending radially along the roller body, the connecting channel connecting the channel and the flow path.

6. The continuous casting roll as described in claim 3, characterized in that, The weld overlay is formed by welding 3 to 5 times on the circumferential surface of the roller body. Before each weld overlay, the weld overlay formed in the previous step must be completely cooled and set.

7. The continuous casting roll as described in claim 1, characterized in that, The roller body and the surface of the weld overlay are coated with a protective layer.

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