Hot spraying tool for sealing roller of continuous annealing furnace

Abstract

This utility model discloses a thermal spraying fixture for sealing rollers in continuous annealing furnaces. The fixture includes a four-jaw chuck, a machine tool guide rail, a support frame, and two support rollers. The two support rollers are spaced apart on the top surface of the support frame via roller brackets, and the distance between the two support rollers matches the diameter of the sealing roller shaft. A guide groove is provided at the bottom end of the support frame, which is then positioned on the machine tool guide rail. This fixture overcomes the shortcomings of traditional sealing roller spraying operations, improves the rigidity of the sealing roller, releases internal stress after spraying, avoids bending deformation of the sealing roller, reduces equipment investment costs, and is simple and convenient to operate, thus improving spraying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to a thermal spraying tool for sealing rollers of continuous annealing furnaces. Background Technology

[0002] The sealing roller inside the continuous annealing furnace has a maximum diameter of 300mm and a length of 4160mm. Other parts and the shaft head are much smaller, with the smallest section having a diameter of 50mm, classifying it as a slender workpiece. Figure 1 As shown, traditional sealing roller coating operations employ a clamping method with a four-jaw chuck 1 and a tailstock center 2 positioned at both ends of the sealing roller 3. Activating the four-jaw chuck 1 rotates the sealing roller 3, thus enabling coating. However, this method makes the sealing roller prone to bending and deformation under gravity. The internal stress cannot be released due to the clamping method, and further heating during coating exacerbates the deformation. Ultimately, the coated roller surface exhibits a bending deformation of up to 1.3mm, rendering it unusable. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a thermal spraying fixture for sealing rollers in continuous annealing furnaces. This fixture overcomes the defects of traditional sealing roller spraying operations, improves the rigidity of the sealing roller, releases the internal stress after spraying, avoids bending and deformation of the sealing roller, reduces equipment investment costs, and is simple and convenient to operate, thereby improving the efficiency of spraying operations.

[0004] To solve the above-mentioned technical problems, the present invention provides a thermal spraying fixture for sealing rollers in continuous annealing furnaces, comprising a machine tool four-jaw chuck, a machine tool guide rail, a support frame, and two support rollers. The two support rollers are spaced apart on the top surface of the support frame via wheel frames, and the distance between the two support rollers matches the diameter of the sealing roller shaft. The bottom end of the support frame is provided with a guide groove, and the support frame is positioned on the machine tool guide rail via the bottom guide groove.

[0005] Furthermore, the two rollers are polyamide rollers.

[0006] Furthermore, a polyamide liner is provided in the guide groove at the bottom of the support frame. This utility model utilizes the aforementioned technical solution for the thermal spraying of sealing rollers in continuous annealing furnaces. Specifically, the fixture includes a four-jaw chuck, a machine tool guide rail, a support frame, and two support rollers. The two support rollers are spaced apart on the top surface of the support frame via wheel brackets, and the distance between the two support rollers matches the diameter of the sealing roller shaft. A guide groove is provided at the bottom of the support frame, which is then positioned on the machine tool guide rail. This fixture overcomes the shortcomings of traditional sealing roller spraying operations, improves the rigidity of the sealing roller, releases internal stress after spraying, avoids bending deformation of the sealing roller, reduces equipment investment costs, and is simple and convenient to operate, thus improving spraying efficiency. Attached Figure Description

[0007] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram of the clamping setup for a traditional sealing roller spraying operation; Figure 2 This is a schematic diagram of the thermal spraying fixture structure for the sealing roller of the continuous annealing furnace according to this utility model; Figure 3 This is a schematic diagram of the support frame structure for this tooling. Detailed Implementation

[0008] Implementation, for example Figure 2 and Figure 3 As shown, the thermal spraying fixture for sealing rollers in continuous annealing furnaces of this utility model includes a machine tool four-jaw chuck 1, a machine tool guide rail 4, a support frame 5, and two support rollers 6. The two support rollers 6 are spaced apart on the top surface of the support frame 5 via wheel frames 61, and the distance between the two support rollers 6 matches the diameter of the shaft head of the sealing roller 3. The bottom end of the support frame 5 is provided with a guide groove 51, and the support frame 5 is positioned on the machine tool guide rail 4 via the bottom guide groove 51.

[0009] Preferably, the two support rollers 6 are polyamide support rollers.

[0010] Preferably, a polyamide liner 52 is provided in the guide groove 51 at the bottom end of the support frame 5.

[0011] The support frame in this fixture is made of 45# or 16Mn quenched and tempered steel, giving it good rigidity and toughness, preventing deformation that may occur during the thermal spraying process. The support rollers are made of polyamide, which is wear-resistant and will not damage the sealing roller shaft, meeting the requirements for use in thermal spraying operations.

[0012] During thermal spraying, the support frame is hoisted onto the machine tool using a crane. The guide groove at the bottom of the support frame is fitted onto the machine tool guide rail via a polyamide liner to prevent damage to the guide rail. The distance between the two polyamide support rollers is adjusted according to the diameter of the sealing roller shaft, and then locked in place. The sealing roller is then hoisted onto the machine tool as a whole. One end of the shaft is secured and locked using the machine tool's four-jaw chuck, while the other end rests on the two polyamide support rollers. This completes the overall installation. The machine tool's four-jaw chuck is then activated to rotate the sealing roller, and the thermal spraying operation can begin.

[0013] During the thermal spraying process of the sealing roller, the flame temperature reaches approximately 3000℃. Using the traditional clamping and support method, internal stress cannot be released. Under gravity, the roller is prone to bending and deformation, which worsens with further heating and high spraying temperatures. However, using a tooling-based clamping and support method, where the machine tool tailstock tip is removed from the sealing roller shaft, serves only to center the roller and has no other purpose. Eliminating the tailstock tip allows for full release of internal stress after thermal spraying, preventing bending and deformation of the sealing roller. Through trial processing, the sealing roller showed no bending or deformation, demonstrating excellent performance.

Claims

1. A thermal spraying fixture for sealing rollers in continuous annealing furnaces, comprising a four-jaw chuck and a machine tool guide rail, characterized in that: It also includes a support frame and two rollers. The two rollers are spaced apart on the top surface of the support frame by a roller frame, and the distance between the two rollers matches the diameter of the sealing roller shaft. The bottom end of the support frame is provided with a guide groove, and the support frame is set on the machine tool guide rail through the bottom guide groove.

2. The thermal spraying fixture for sealing rollers in a continuous annealing furnace according to claim 1, characterized in that: The two rollers are polyamide rollers.

3. The thermal spraying fixture for sealing rollers in a continuous annealing furnace according to claim 1, characterized in that: The bottom guide groove of the support frame is provided with a polyamide liner.

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