Centering device of consumable vacuum furnace

Abstract

The utility model belongs to the technical field of vacuum self-consuming furnaces, and discloses a centering device of a vacuum self-consuming furnace, which comprises a lower furnace body flange, a crucible flange and an upper furnace body flange, the crucible flange is connected onto the lower furnace body flange, the upper furnace body flange is connected onto the crucible flange, and the lower furnace body flange, the crucible flange and the upper furnace body flange are coaxial. The outer diameter of the lower furnace body flange is larger than that of the crucible flange and that of the upper furnace body flange, the outer diameter of the crucible flange is the same as that of the upper furnace body flange, three threaded holes are evenly formed in the end face of the lower furnace body flange at intervals, the threaded holes are formed in the lower furnace body flange in a penetrating mode, through holes are formed in the upper end faces of the guide columns in a penetrating mode, and the guide columns are in threaded connection with the threaded holes through bolts. The guide column comprises the guide column upper portion and the guide column base body, the guide column is used for guiding the crucible and the lower furnace body to be centered, the problems that the product quality is affected by furnace charging deviation, the crucible is prone to being damaged and the like can be avoided, the guide column can be rotated by an angle to be continuously used after being abraded, the service life of the guide column is prolonged, and the production cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum self-consuming furnace technology, specifically relating to a centering device for a vacuum self-consuming furnace. Background Technology

[0002] Vacuum arc remelting furnaces are characterized by a pure melting environment, the ability to obtain high-quality ingots, fast melting speed, and a high degree of automation. In a vacuum environment, the high temperature generated by the electric arc discharge between the arc remelting electrode and the crucible serves as a heat source to melt the metal material at the tip of the arc remelting electrode.

[0003] In the vacuum arc remelting (VAR) process, the coordinated operation of the electrode, crucible, and lower furnace body is a critical technological step that directly affects the smelting quality, ingot composition uniformity, and equipment safety. Specifically, the electrode axis must be coaxial with the crucible (water-cooled copper crucible); otherwise, problems such as arc blowout, localized crucible burn-through, and ingot composition segregation may occur. The crucible flange connects to the lower furnace body flange, and a sealing ring ensures vacuum sealing. The alignment of the crucible and the lower furnace body is crucial for ensuring a stable smelting process and uniform ingot quality. Therefore, the degree of alignment among the electrode, crucible, and lower furnace body plays a vital role in determining whether high-quality ingots can be produced.

[0004] Currently, when the crucible is placed into the lower furnace body, it needs to be manually aligned, and then the electrodes and crucible need to be manually aligned and adjusted. Manual alignment has no reference, which is prone to deviation, resulting in low furnace loading efficiency. Furnace loading deviation affects product quality and can easily lead to crucible damage. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a centering device for a vacuum consumable furnace. It has a simple structure and is easy to operate. It guides the crucible flange and the lower furnace flange to be aligned by a guide column set on the lower furnace flange, ensuring that the center of the crucible and the lower furnace body are aligned. This avoids problems such as the impact of furnace loading deviation on product quality and easy damage to the crucible. Moreover, the guide column can be rotated and reused after wear, which improves work efficiency and saves production costs.

[0006] The technical solution adopted in this utility model is: a centering device for a vacuum arc furnace, including an upper furnace body flange, a crucible flange, a lower furnace body flange, and a guide column. The lower furnace body flange is connected to the crucible flange, and the upper furnace body flange is connected to the crucible flange; all three are on the same axis. The outer diameter of the lower furnace body flange is larger than the outer diameters of the crucible flange and the upper furnace body flange, while the outer diameters of the crucible flange and the upper furnace body flange are the same. Three threaded holes are evenly spaced on the end face of the lower furnace body flange, and these threaded holes penetrate the lower furnace body flange. A through hole is provided on the upper end face of the guide column, and the guide column is connected to a threaded bolt. The perforated and threaded connection is used for quick replacement of the guide post after the beveled surface of the guide post is worn. The guide post consists of an upper part and a base. The outer circumference of the upper part of the guide post is provided with a beveled part, which has a conical structure. The base of the guide post has a cylindrical structure. The base of the guide post is fixed to the lower furnace flange by bolts. The guide post is used to guide the crucible flange and the lower furnace flange to be aligned, ensuring that the center of the crucible and the lower furnace body are aligned. This avoids problems such as the impact of furnace loading deviation on product quality and easy damage to the crucible. Moreover, the guide post can be rotated after wear and continue to be used, extending the service life of the guide post and saving production costs.

[0007] Specifically, the height of the guide column base is the sum of the thicknesses of the crucible flange and the upper furnace flange, and the distance between the guide column base and one side of the crucible flange and the upper furnace flange is less than 1mm.

[0008] Specifically, the angle between the inclined surface of the upper part of the guide column and the horizontal plane is between 60° and 75°.

[0009] Specifically, the upper part of the guide post and the guide post base are integrally formed.

[0010] Specifically, the guide pillars are made of non-metallic materials.

[0011] Specifically, the guide pillars are made of nylon.

[0012] The beneficial effects of this utility model are as follows: (1) This utility model has a simple structure and is easy to operate. By guiding the crucible flange and the lower furnace flange through the guide column set on the lower furnace flange, the crucible and the lower furnace flange are aligned, ensuring that the crucible and the lower furnace center are aligned. While ensuring that the crucible and the lower furnace center are aligned, the problems of the furnace loading deviation affecting product quality and easily causing crucible damage are avoided. It effectively ensures that the alignment error between the crucible and the lower furnace is within 2mm. On the basis of the alignment between the crucible and the lower furnace, the alignment error between the electrode and the crucible is within 5mm by manually adjusting the electrode position, which improves production efficiency.

[0013] (2) The guide post of this utility model can be rotated to continue to be used after it is worn, which improves work efficiency and saves production costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 This is a CC sectional view of the top view of this utility model.

[0017] The markings in the diagram are: 1. Upper furnace flange; 2. Crucible flange; 3. Lower furnace flange; 4. Threaded hole; 5. Guide post; 51. Upper part of guide post; 52. Guide post base; 6. Bolt. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-3 As shown, a centering device for a vacuum arc furnace includes an upper furnace flange 1, a crucible flange 2, a lower furnace flange 3, and a guide column 5. The crucible flange 2 is connected to the lower furnace flange 3, and the upper furnace flange 1 is connected to the crucible flange 2, with all three sharing the same axis. The outer diameter of the lower furnace flange 3 is larger than that of the crucible flange 2 and the upper furnace flange 1, while the outer diameters of the crucible flange 2 and the upper furnace flange 1 are the same. Three threaded holes 4 are evenly spaced on the end face of the lower furnace flange 3, and the threaded holes 4 penetrate the lower furnace flange 3. A through hole is provided on the upper end face of the guide column 5, and the guide column 5 is connected by bolts 6. The guide post 5, connected to the threaded hole 4, includes an upper part 51 and a base 52. The upper part 51 has a beveled section on its outer circumference, which is conical in shape. The base 52 is cylindrical. The base 52 is fixed to the lower furnace flange 3 by bolts 6. The guide post 5 is used to guide the crucible flange 2 and the lower furnace flange 3 to be aligned, ensuring that the crucible and the lower furnace are aligned. This avoids problems such as loading deviation affecting product quality and easily causing crucible damage. Furthermore, the guide post 5 can be rotated after wear, extending its service life and saving production costs.

[0020] Preferably, the height of the guide column base 52 is the sum of the thicknesses of the crucible flange 2 and the upper furnace flange 1, and the single-sided distance between the guide column base 52 and the crucible flange 2 and the upper furnace flange 1 is less than 1 mm.

[0021] Preferably, the angle between the inclined portion of the guide post 5 and the horizontal plane is between 60° and 75°.

[0022] Preferably, the upper part 51 of the guide post and the base 52 of the guide post are integrally formed.

[0023] Preferably, the guide post 5 is made of a non-metallic material.

[0024] Preferably, the guide post 5 is made of nylon.

[0025] During operation, check if the guide post 5 is worn. If the guide post 5 is worn, rotate it to a surface without wear. If the guide post 5 is severely worn, it needs to be replaced. Remove the bolts inside the guide post 5, replace it with a new guide post 5, and tighten the bolts 6 inside the guide post 5 to connect it with the thread of the lower furnace flange 3. Then, use a crane with clamps to vertically lift the crucible and slowly lower it to a point 30cm above the lower furnace body. The crucible will swing during the lifting process. Use the guide post 5 to determine the coaxial centering of the crucible flange 2 and the lower furnace flange 3, avoiding the lower furnace flange 3 from bumping or scratching the crucible during the descent. Finally, slowly lower it until the center of the crucible flange 2 and the lower furnace flange 3 are aligned. Then, use the lifting clamps to vertically lift the crucible. During the descent, refer to the guide post 5 and manually adjust the electrode position to make the gaps around it roughly uniform (deviation ≤5mm). Stop at a point about 50mm from the bottom of the crucible, aligning the center of the upper furnace flange 1 with the center of the crucible flange 2 and the lower furnace flange.

Claims

1. A centering device for a vacuum arc furnace, characterized in that: The furnace includes an upper furnace flange (1), a crucible flange (2), a lower furnace flange (3), and a guide column (5). The lower furnace flange (3) is connected to the crucible flange (2), and the crucible flange (2) is connected to the upper furnace flange (1). All three are on the same axis. The outer diameter of the lower furnace flange (3) is larger than the outer diameters of the crucible flange (2) and the upper furnace flange (1). The outer diameters of the crucible flange (2) and the upper furnace flange (1) are the same. Three threaded holes (4) are evenly spaced on the end face of the lower furnace flange (3). The threaded holes (4) penetrate the lower furnace flange. On the flange (3), a through hole is provided on the upper end face of the guide column (5). The guide column (5) is threadedly connected to the threaded hole (4) by bolts (6). The guide column (5) includes an upper part (51) and a guide column base (52). The outer circumference of the upper part (51) of the guide column is provided with a beveled part, which has a conical structure. The guide column base (52) has a cylindrical structure. The guide column base (52) is fixed to the lower furnace flange (3) by bolts (6). The guide column (5) is used to guide the crucible flange (2) and the lower furnace flange (3) to be aligned.

2. The centering device for a vacuum arc furnace according to claim 1, characterized in that: The height of the guide column base (52) is the sum of the thicknesses of the crucible flange (2) and the upper furnace flange (1), and the single-sided distance between the guide column base (52) and the crucible flange (2) and the upper furnace flange (1) is less than 1 mm.

3. The centering device for a vacuum arc furnace according to claim 2, characterized in that: The angle between the inclined part of the upper part (51) of the guide column and the horizontal plane is between 60° and 75°.

4. The centering device for a vacuum arc furnace according to claim 3, characterized in that: The upper part (51) of the guide post and the base (52) of the guide post are integrally formed.

5. The centering device for a vacuum arc furnace according to any one of claims 1-4, characterized in that: The guide post (5) is made of non-metallic material.

6. The centering device for the vacuum arc furnace according to claim 5, characterized in that: The guide post (5) is made of nylon.

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