A spliced runner for titanium alloy pouring

Abstract

The utility model discloses a spliced drainage tube for titanium alloy pouring, related to casting technical field, aims at solving the problem of the existing graphite drainage tube needing to cut the equipment height, inconvenient operation and material waste. The drainage tube is spliced by multiple sleeve pipe monomers, each sleeve pipe monomer is provided with a plug-in ring at the top and a mounting counterbore at the bottom, and adjacent sleeve pipe monomers are plug-in matched through the plug-in ring and the mounting counterbore. The sleeve pipe monomer is provided with an upper plate body at the upper part and a lower plate body at the lower part, and the lower plate body is overlapped on the top surface of the upper plate body during splicing. The utility model can select the number of sleeve pipe monomers flexibly according to the actual height of the furnace door and the pouring cup, and does not need to cut the graphite pipe, which simplifies the operation, avoids material waste, guarantees the stability of the drainage and the metallurgical quality of titanium alloy pouring.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a spliced ​​drainage pipe for titanium alloy casting. Background Technology

[0002] Titanium alloy casting is a key process in which molten metal is injected into a mold shell to form a solid casting. However, titanium alloys are highly chemically reactive and readily react with elements such as hydrogen and oxygen in the air, which can affect the quality of titanium alloy casting.

[0003] If there is no drainage pipe to guide the molten metal during pouring, it will enter outside the mold, causing pouring failure. Furthermore, using conventional steel pipes will cause them to melt under the influence of the high-temperature molten metal, leading to an increase in the Fe content of the casting and severely affecting metallurgical quality.

[0004] The graphite-type drainage tube used is designed to reduce the distance between the sprue and the pouring cup, thereby guiding the molten metal. It also has reliable chemical stability and will not react with the molten metal.

[0005] However, the height of the furnace door of the existing equipment does not match the height of the pouring cup inside the furnace. Each time it is used, a suitable length of sleeve and drain pipe needs to be cut from the purchased graphite tube to fit the equipment, which is inconvenient to operate and causes a great waste of graphite tubes. Utility Model Content

[0006] The main purpose of this invention is to propose a spliced ​​drainage tube for titanium alloy casting, which solves the technical problems of existing graphite drainage tubes that require cutting and fitting, are inconvenient to operate, and waste materials.

[0007] To achieve the above objectives, this utility model proposes a spliced ​​drainage pipe for titanium alloy casting, which is composed of multiple sleeve units spliced ​​together. Each sleeve unit has a plug-in ring at the top and a mounting countersunk hole at the bottom. The adjacent sleeve units are connected to each other through the plug-in ring and the mounting countersunk hole.

[0008] Preferably, each sleeve unit has an upper plate at the top and a lower plate at the bottom; when two adjacent sleeve units are spliced, the lower plate overlaps the top surface of the upper plate.

[0009] Preferably, the distance between the top wall of the mounting hole and the bottom surface of the lower plate is t; the distance between the top surface of the insertion ring and the top surface of the upper plate is h; satisfying: 0.5t≤h≤0.8t.

[0010] Preferably, both the upper plate and the lower plate are square plates with equal side lengths.

[0011] Preferably, the outer peripheral surface of the insertion ring and the inner surface of the mounting countersunk hole are interference fit.

[0012] Preferably, a first chamfer is provided on the edge of the insertion ring, and a second chamfer is provided on the edge of the opening of the mounting hole.

[0013] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: (1) Solving the height adaptation problem: The drainage pipe provided by this utility model is composed of multiple sleeve units of uniform specifications spliced ​​together, without the need for overall cutting, and the length can be flexibly adjusted according to actual needs. That is, in actual use, the corresponding number of sleeve units can be selected and spliced ​​according to the actual height of the furnace door and the pouring cup, and the spliced ​​drainage pipe can be installed between the pouring cup and the straight runner.

[0014] (2) Avoid material waste: The sleeve unit can be reused, and the unspliced ​​sleeve unit can be kept for the next use. No waste is generated, which greatly reduces the waste rate of graphite materials and saves production costs. Attached Figure Description

[0015] 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 the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the spliced ​​drainage tube provided by this utility model; Figure 2 A structural anatomical view of the spliced ​​drainage tube provided by this utility model; Figure 3 This is a three-dimensional structural diagram of the sleeve unit in this utility model; Figure 4 This is a cross-sectional view of the three sections of the sleeve being spliced ​​together to form a spliced ​​drainage tube in this utility model. Figure 5 This is a schematic diagram showing the connection between the spliced ​​drainage pipe provided by this utility model and the pouring cup and sprue.

[0017] The reference numerals in the attached diagrams are as follows: 1. Sleeve unit; 101. Insertion ring; 102. Mounting countersunk hole; 103. Upper plate; 104. Lower plate; 105. First chamfer; 106. Second chamfer; 2. Pour cup; 3. Sprue. Detailed Implementation

[0018] 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.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] Combination Figures 1 to 4 As shown, a spliced ​​drainage pipe for titanium alloy casting is provided. This drainage pipe is composed of multiple uniformly sized sleeve units 1 spliced ​​together, eliminating the need for overall cutting and allowing for flexible length adjustment according to actual needs. Each sleeve unit 1 has an integrally formed insertion ring 101 at the top and a countersunk hole 102 at the bottom that matches the insertion ring 101. When two adjacent sleeve units 1 are spliced, the insertion ring 101 of the lower sleeve unit 1 is directly inserted into the countersunk hole 102 of the upper sleeve unit 1, forming a stable connection structure and ensuring no leakage during the flow of molten titanium alloy.

[0022] In this embodiment, the sleeve unit 1 is manufactured using a graphite molding process. Other materials may also be used depending on actual needs, which will not be elaborated here.

[0023] To further enhance the stability after splicing, each sleeve unit 1 is fixedly equipped with an upper plate 103 at the top and a lower plate 104 at the bottom. When two adjacent sleeve units 1 are spliced, the lower plate 104 of the upper sleeve unit 1 overlaps precisely on the top surface of the upper plate 103 of the lower sleeve unit 1, forming a dual positioning: on the one hand, radial positioning is achieved through the insertion ring 101 and the mounting countersunk hole 102; on the other hand, axial positioning is achieved through the overlap of the lower plate 104 and the upper plate 103, preventing the drainage pipe from shifting or separating due to the impact of molten metal during the pouring process.

[0024] Combination Figure 2 As shown, the distance between the top wall of the mounting countersunk hole 102 and the bottom surface of the lower plate 104 is t; the distance between the top surface of the insertion ring 101 and the top surface of the upper plate 103 is h; satisfying: 0.5t≤h≤0.8t. This dimensional range ensures that the insertion ring 101 has sufficient insertion depth after being inserted into the mounting countersunk hole 102, avoiding loosening; at the same time, it does not affect the tight overlap between the lower plate 104 and the upper plate 103, avoiding excessive gaps that could lead to molten metal leakage.

[0025] In this embodiment, both the upper plate 103 and the lower plate 104 are square plates with equal side lengths. Compared to circles or other shapes, the square structure makes it easier to position and place the plate before casting, while also increasing the contact area between the plate and the mold shell and the pouring cup, thus improving overall stability.

[0026] Furthermore, the outer circumferential surface of the insertion ring 101 and the inner surface of the mounting countersunk hole 102 are interference-fitted, with an interference amount of 0.05-0.1mm. After splicing, no additional fasteners are required to achieve a tight connection, preventing molten metal from leaking from the splice gaps.

[0027] Combination Figure 2 As shown, a first chamfer 105 is provided on the edge of the insertion ring 101, and a second chamfer 106 is provided on the edge of the opening of the mounting countersunk hole 102. The chamfer structure can guide the insertion ring to be quickly and accurately inserted into the mounting countersunk hole, simplifying the splicing operation, while avoiding the generation of graphite fragments due to collision on the edge (if graphite fragments are mixed into the molten metal, they will affect the quality of the casting).

[0028] Combination Figure 5 As shown, the splicing and usage process is as follows: S1. Measure the height difference between the furnace door and the pouring cup 2 inside the furnace to determine the total length of the required drainage pipe. In this embodiment, therefore, three sections of sleeve are selected for splicing.

[0029] S. Take the first sleeve unit 1 (as the bottom), place its lower plate 104 on top of the mold shell sprue 3, and ensure that the center of the sleeve unit 1 is aligned with the center of the sprue 3.

[0030] S3. Take the second sleeve unit 1, align the mounting countersunk hole 102 at the bottom of it with the insertion ring 101 at the top of the first sleeve unit 1, and slowly insert it, using the first chamfer 105 and the second chamfer 105 for guidance; until the lower plate 104 of the second sleeve unit 1 is completely attached to the top surface of the upper plate 103 of the first sleeve unit 1.

[0031] S4. Repeat step S3 to splice the third sleeve unit 1 above the second sleeve unit 1 to complete the drainage pipe assembly, and then install the pouring cup 2 on the top of the drainage pipe.

[0032] During pouring, the molten titanium alloy flows from the pouring cup 2 into the spliced ​​drain pipe, and is stably injected into the mold shell sprue 3 through the drain pipe without leakage or deviation. After pouring is completed, the sleeve unit is disassembled, cleaned and stored for future use.

[0033] In this embodiment, the spliced ​​drainage pipe is easy to operate, has no material waste, and the casting process is stable, effectively ensuring the quality of the titanium alloy casting.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A spliced ​​drainage pipe for use in titanium alloy casting, characterized in that, It is composed of multiple sleeve units (1) spliced ​​together. Each sleeve unit (1) is provided with a plug ring (101) at the top and a mounting countersunk hole (102) at the bottom. The two adjacent sleeve units (1) are connected to the mounting countersunk hole (102) by the insertion ring (101).

2. The spliced ​​drainage tube according to claim 1, characterized in that, Each sleeve unit (1) has an upper plate (103) at the top and a lower plate (104) at the bottom. When the two adjacent sleeve units (1) are spliced ​​together, the lower plate (104) overlaps the top surface of the upper plate (103).

3. The spliced ​​drainage tube according to claim 2, characterized in that, The distance between the top wall of the mounting countersunk hole (102) and the bottom surface of the lower plate (104) is t; The distance between the top surface of the plug ring (101) and the top surface of the upper plate (103) is h; It satisfies: 0.5t≤h≤0.8t.

4. The spliced ​​drainage tube according to claim 2, characterized in that, The upper plate (103) and the lower plate (104) are both square plates, and their side lengths are equal.

5. The spliced ​​drainage tube according to claim 1, characterized in that, The outer peripheral surface of the insertion ring (101) and the inner surface of the mounting countersunk hole (102) are interference fit.

6. The spliced ​​drainage tube according to claim 1, characterized in that, A first chamfer (105) is provided on the edge of the insertion ring (101), and a second chamfer (106) is provided on the edge of the opening of the mounting countersunk hole (102).

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