Forming hydraulic device for profiled zirconium core

Abstract

The utility model provides a kind of forming hydraulic device of special-shaped zirconium core, including a fixedly arranged outer sleeve, the core shaft movable along the axis direction of outer sleeve is equipped in outer sleeve inside, the core shaft includes extension shaft section and the step portion at the end position of extension shaft section, the outer diameter of step portion is greater than the outer diameter of extension shaft section, the utility model is by zirconium powder filling between inner sleeve and core shaft in the forming cavity formed, and the inner wall of inner sleeve has the convex ring structure outward protruding, using the way of upper pressing plate press fitting can quickly make special-shaped zirconium core form, and after forming, core shaft and inner sleeve are jointly moved to outer sleeve outside, after the two semicircular sleeve parts of inner sleeve are disassembled, to realize the effect of quick demolding, replace traditional mechanical cutting mode to the forming processing of zirconium core, it is favorable to improve the forming efficiency of special-shaped zirconium core, reduce material waste and cost, and it is favorable to improve zirconium core overall structure strength, it is favorable to prolong its service life.

Description

Technical Field

[0001] This utility model belongs to the field of machine pressing technology, specifically relating to a hydraulic device for molding irregular zirconium cores. Background Technology

[0002] Zirconium cores are key functional components in continuous casting nozzle systems, typically installed at the center of the nozzle. Made of high-purity zirconium, these cores possess excellent high-temperature resistance, corrosion resistance, and resistance to slag erosion. During continuous casting, they come into direct contact with the high-temperature molten steel and protective slag. Through their internal channels or irregular structures, the zirconium core controls the flow rate and direction of the molten steel, thereby achieving stable regulation of the molten steel flow and ensuring smooth casting and consistent product quality. Typically, zirconium cores are used in conjunction with nozzles made of alumina-carbon materials, with the nozzles providing support and thermal insulation; together, they constitute the continuous casting nozzle assembly.

[0003] The shape and size of the zirconium core must match the nozzle to ensure a secure installation and prevent molten steel leakage or abnormal flow due to loosening during use. Therefore, existing technologies use irregularly shaped zirconium cores to match the nozzle, such as... Figure 6 The diagram shows the structure of a sprue assembly, which includes an outer sprue 9 and an inner shaped zircon core 10. This shaped zircon core 10 has an annular groove 1001 formed on its outer circumference. After the entire sprue assembly is formed, the outer aluminum-carbon material can be placed within the groove 1001, thereby improving the overall connection structure and making the zircon core more robust and secure. However, to form this annular groove 1001, the existing method for manufacturing the shaped zircon core is to use a five-axis CNC machining center. However, this machining method suffers from low efficiency, high cost, and significant material waste. Furthermore, due to the hardness and brittleness of zirconium material and its unique high-temperature sintering properties, micro-cracks or surface damage are easily generated during the machining process, thus affecting the product's service life. Utility Model Content

[0004] This utility model provides a hydraulic device for forming irregular zirconium cores, which solves the problems mentioned in the background art, such as low efficiency, high cost, serious material waste, and easy damage to zirconium materials caused by mechanical cutting, resulting in a decline in product performance.

[0005] The technical solution adopted by this utility model is as follows: a hydraulic device for forming irregular zirconium cores, including a fixed outer sleeve, a mandrel that can move along the axis of the outer sleeve inside the outer sleeve, the mandrel including an extension shaft section and a stepped part located at the end of the extension shaft section, the outer diameter of the stepped part being larger than the outer diameter of the extension shaft section, and the outer diameter of the stepped part being consistent with the inner diameter of the outer sleeve; an inner sleeve that can rise and fall synchronously with the mandrel is provided inside the outer sleeve, the inner sleeve being composed of two semi-circular sleeve components joined together, the two semi-circular sleeve components having outwardly protruding convex rings on their inner walls, the outer wall of the inner sleeve being in contact with the inner wall of the outer sleeve, and an annular forming cavity being formed between the inner wall of the inner sleeve and the extension shaft section of the mandrel, the forming cavity being used to fill zirconium powder and form irregular zirconium cores under hydraulic action.

[0006] The lower end of the inner sleeve abuts against the stepped end face of the mandrel.

[0007] It also includes a hydraulic forming machine, which includes a frame with a worktable on the frame and an outer sleeve fixedly installed on the worktable.

[0008] A fixing plate is fixedly installed on the surface of the workbench. The lower outer wall of the outer sleeve has an outwardly extending positioning flange that extends into the interior of the fixing plate. After the fixing plate is installed on the workbench, the outer sleeve is fixed.

[0009] A pusher is installed on the frame. The telescopic rod of the pusher passes through the frame and the worktable and abuts against the end of the mandrel. It is used to push the mandrel and the inner sleeve outward from the outer sleeve after pressing.

[0010] The jacking component is a hydraulic cylinder.

[0011] It also includes a pressure plate, which is installed on the hydraulic forming machine and can reciprocate in the vertical direction. The pressure plate can also extend into the forming cavity to press and form the powder in the forming cavity.

[0012] The inner diameter of the outer sleeve gradually decreases from top to bottom.

[0013] The beneficial effects of this utility model are as follows: This invention fills the molding cavity formed between the inner sleeve and the mandrel with zirconium powder. The inner wall of the inner sleeve has an outwardly protruding ring structure. The upper pressure plate press-fitting method can quickly form irregular zirconium cores. After molding, the mandrel and the inner sleeve move together to the outside of the outer sleeve. After the two semi-circular sleeve components of the inner sleeve are disassembled, a rapid demolding effect is achieved. This method replaces the traditional mechanical cutting method for forming zirconium cores, which is beneficial to improving the forming efficiency of irregular zirconium cores, reducing material waste and cost, improving the overall structural strength of the zirconium core, and extending its service life. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is an exploded view of the inner sleeve and mandrel of this utility model; Figure 5 This is a structural schematic diagram of the pressing process of this utility model; Figure 6 This is a structural diagram of the sprue assembly in the prior art.

[0015] in: 1. Fixing plate; 2. Outer sleeve; 201. Positioning flange; 3. Mandrel; 4. Inner sleeve; 5. Pressure plate; 6. Frame; 7. Pushing component; 8. Worktable; 9. Sprue; 10. Irregular zircon core; 1001. Groove. Detailed Implementation

[0016] 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.

[0017] As shown in the figure, a hydraulic device for forming irregularly shaped zirconium cores includes a fixed outer sleeve 2, which can be made of high-strength wear-resistant alloy steel to ensure sufficient rigidity and pressure resistance during high-pressure forming. Inside the outer sleeve 2 is a mandrel 3 that can move along the axis of the outer sleeve 2. The mandrel 3 includes an extension shaft section and a stepped portion located at the end of the extension shaft section. The outer diameter of the stepped portion is larger than the outer diameter of the extension shaft section, and the outer diameter of the stepped portion matches the inner diameter of the outer sleeve 2. Inside the outer sleeve 2 is an inner sleeve 4 that can move synchronously with the mandrel 3. The inner sleeve 4 is composed of two semi-circular sleeve components joined together. Each of the two semi-circular sleeve components has an outwardly protruding convex ring on its inner wall. The outer wall of the inner sleeve 4 fits against the inner wall of the outer sleeve 2. An annular forming cavity is formed between the inner wall of the inner sleeve 4 and the extension shaft section of the mandrel 3. The forming cavity is used to fill zirconium powder and form an irregularly shaped zirconium core under hydraulic pressure. The extended shaft section of the mandrel 3 is used to define the inner hole shape of the irregular zircon core. The step portion can effectively prevent the inner sleeve 4 from moving downward under pressure, thereby ensuring the stability of the molding cavity size.

[0018] The lower end of the inner sleeve 4 abuts against the stepped end face of the mandrel 3.

[0019] It also includes a hydraulic forming machine, which includes a frame 6 with a worktable 8 on the frame 6. The outer sleeve 2 is fixedly installed on the worktable 8. The hydraulic forming machine has a vertical structure. The frame 6 adopts a welded steel frame structure to provide good support stability. The worktable 8, as the main load-bearing platform, needs to ensure flatness and pressure-bearing capacity in order to maintain the stable positioning of the outer sleeve 2 during hydraulic pressing.

[0020] A fixing plate 1 is fixedly installed on the surface of the workbench 8. The lower outer wall of the outer sleeve 2 has an outwardly extending positioning flange 201. The positioning flange 201 extends into the interior of the fixing plate 1. After the fixing plate 1 is installed on the workbench 8, the outer sleeve 2 is fixed. In this example, the fixing plate 1 is installed on the workbench 8 by bolt connection. At the same time as the fixing plate 1 is installed in place, the outer sleeve 2 is also fixed to the workbench 8.

[0021] A pusher 7 is installed on the frame 6. The telescopic rod of the pusher 7 passes through the frame 6 and the worktable 8 and abuts against the end of the mandrel 3. It is used to push the mandrel 3 and the inner sleeve 4 outward from the outer sleeve 2 after pressing. Specifically, in this example, the pusher 7 is a hydraulic cylinder. The diameter of the telescopic rod of the hydraulic cylinder is smaller than the outer diameter of the stepped part of the mandrel 3. This ensures that during the pressing stage, the lower end of the stepped part of the mandrel 3 abuts against the worktable 8 and does not apply force to the hydraulic cylinder. After pressing, the telescopic rod extends, which pushes the mandrel 3 and the inner sleeve 4 outward from the outer sleeve 2 for quick demolding. During demolding, the two semi-circular sleeve components are moved radially outward, and then the mandrel 3 is pulled out axially to obtain the formed zirconium core blank.

[0022] It also includes a pressure plate 5, which is installed on the hydraulic forming machine and can reciprocate in the vertical direction. The pressure plate 5 can extend into the forming cavity to press and form the powder in the forming cavity. In this example, the pressure plate 5 is connected to the hammer head of the hydraulic forming machine and can move up and down under the action of the hydraulic forming machine. This structure and principle are conventional settings in the prior art and will not be described in detail here. Its main purpose is to press the powder in the forming cavity to form the zirconium core.

[0023] The inner diameter of the outer sleeve 2 gradually decreases from top to bottom. This tapered structure is designed to reduce frictional resistance during the ejection stage, making it easier for the irregularly shaped zircon core to be demolded smoothly.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic device for forming irregularly shaped zirconium cores, characterized in that, The device includes a fixed outer sleeve (2), inside which is a mandrel (3) that can move along the axis of the outer sleeve (2). The mandrel (3) includes an extension shaft section and a stepped section located at the end of the extension shaft section. The outer diameter of the stepped section is larger than the outer diameter of the extension shaft section, and the outer diameter of the stepped section is consistent with the inner diameter of the outer sleeve (2). Inside the outer sleeve (2) is an inner sleeve (4) that can rise and fall synchronously with the mandrel (3). The inner sleeve (4) is composed of two semi-circular sleeve components. The two semi-circular sleeve components have protruding rings on their inner walls. The outer wall of the inner sleeve (4) is in contact with the inner wall of the outer sleeve (2). An annular forming cavity is formed between the inner wall of the inner sleeve (4) and the extension shaft section of the mandrel (3). The forming cavity is used to fill zirconium powder and form a shaped zirconium core under hydraulic pressure.

2. The hydraulic device for forming irregularly shaped zirconium cores according to claim 1, characterized in that, The lower end of the inner sleeve (4) abuts against the stepped end face of the mandrel (3).

3. The hydraulic device for forming irregularly shaped zirconium cores according to claim 1, characterized in that, It also includes a hydraulic forming machine, which includes a frame (6), a worktable (8) on the frame (6), and an outer sleeve (2) fixedly installed on the worktable (8).

4. The hydraulic device for forming irregularly shaped zirconium cores according to claim 3, characterized in that, A fixing plate (1) is fixedly installed on the surface of the workbench (8). The outer wall of the lower end of the outer sleeve (2) has an outwardly extending positioning flange (201). The positioning flange (201) extends into the interior of the fixing plate (1). After the fixing plate (1) is installed on the workbench (8), the outer sleeve (2) is fixed.

5. The hydraulic device for forming irregularly shaped zirconium cores according to claim 3, characterized in that, A pusher (7) is installed on the frame (6). The telescopic rod of the pusher (7) passes through the frame (6) and the worktable (8) and abuts against the end of the mandrel (3). It is used to push the mandrel (3) and the inner sleeve (4) out of the outer sleeve (2) together after pressing.

6. The hydraulic device for forming irregularly shaped zirconium cores according to claim 5, characterized in that, The jacking component (7) is a hydraulic cylinder.

7. The hydraulic device for forming irregularly shaped zirconium cores according to claim 3, characterized in that, It also includes a pressure plate (5), which is installed on a hydraulic forming machine and can reciprocate in the vertical direction. The pressure plate (5) can extend into the forming cavity to press and form the powder in the forming cavity.

8. The hydraulic device for forming irregularly shaped zirconium cores according to claim 1, characterized in that, The inner diameter of the outer sleeve (2) gradually decreases from top to bottom.

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