Spinning device for nickel alloy cylindrical part with large diameter-thickness ratio

Abstract

The invention relates to the technical field of spinning devices, and discloses a large-diameter-thickness-ratio nickel alloy cylindrical part spinning device which comprises a spinning device body, and the spinning device body comprises a workbench; the cooling mechanism comprises a first air supply disc installed between the rotating base and the core mold, and the first air supply disc is rotationally connected with a second air supply disc; a plurality of nozzles are formed in the air supply pipe, and a plurality of airflow through openings are formed in the outer surface of the core mold. The first air supply disc and the core mold rotate synchronously, cold air is input in a sealed mode in the rotating state, and the annular S-shaped air supply pipes passing through the interlayer of the inner wall of the core mold are evenly distributed. On one hand, cooling airflow is directly sprayed to the surface of a core mold and the inner wall of a workpiece through a nozzle and an airflow through opening in an air supply pipe, and surface forced convection cooling is formed; on the other hand, when the air flows in the air supply pipe, conduction cooling is conducted on the core mold body through heat conduction of the metal wall face, and bidirectional temperature control of core mold interior cooling and workpiece surface cooling is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of spinning devices, and more specifically, it relates to a spinning device for nickel alloy cylindrical parts with a large diameter-thickness ratio. Background Art

[0002] Nickel alloy cylindrical parts with a large diameter-thickness ratio refer to cylindrical or tubular structural parts made of nickel-based alloys and having a relatively large ratio of diameter to wall thickness. Relying on the excellent high-temperature resistance, corrosion resistance, and high strength characteristics of nickel alloys, they are widely used in extreme environments such as aerospace engine combustion chambers, chemical reaction kettles, and nuclear reactor components.

[0003] Currently, during the spinning process of nickel alloy cylindrical parts with a large diameter-thickness ratio, due to the poor thermal conductivity of the nickel alloy material, a large amount of heat is generated due to intense friction in the contact area between the workpiece and the core mold during spinning, resulting in a sharp increase in the interface temperature between the cylindrical part and the core mold.

[0004] Specifically, nickel alloys are prone to microstructural changes such as grain coarsening and precipitation of the second phase at high temperatures, leading to a decrease in the mechanical properties of the material, and further causing defects such as skinning and bulging on the surface of the cylindrical part, seriously affecting its surface quality and dimensional accuracy. In addition, the core mold will undergo thermal expansion deformation under the action of high temperature, exacerbating the friction and wear between the core mold and the workpiece, resulting in a significant reduction in the service life of the core mold. Frequent replacement of the core mold not only increases production costs but also introduces errors due to re-aligning the mold, further affecting the processing stability. Summary of the Invention

[0005] The present invention provides a spinning device for nickel alloy cylindrical parts with a large diameter-thickness ratio, which solves the technical problem in the related art that due to the poor thermal conductivity of the nickel alloy material, a large amount of heat is generated due to intense friction in the contact area between the workpiece and the core mold during spinning, resulting in a sharp increase in the interface temperature between the cylindrical part and the core mold.

[0006] The present invention provides a spinning device for nickel alloy cylindrical parts with a large diameter-thickness ratio, including a spinning device body. The spinning device body includes a workbench, and a base is installed on the workbench. A rotating base is connected to the base by a bearing, and a core mold is provided on the rotating base. A lead screw is connected to the workbench by a bearing, and a nut pair is threadedly connected to the lead screw. A spinning unit is slidably connected to the workbench, and the spinning unit is fixedly connected to the nut pair. A cooling mechanism, the cooling mechanism includes a first air supply disk installed between the rotating base and the core mold, and a second air supply disk is rotatably connected to the first air supply disk. A connecting pipe is installed on the second air supply disk. A chamber is opened inside the first air supply disk. An inner wall sandwich is opened inside the core mold, and air supply pipes are annularly distributed in the inner wall sandwich. A plurality of nozzles are opened on the air supply pipes. A plurality of air flow openings are opened on the outer surface of the core mold, and the air flow openings pass through the inner wall sandwich and are connected to the inside of the nozzles.

[0007] As a further optimized solution of the present invention, annular chutes are provided on both sides of the chamber, annular sliders are slidably connected in the annular chutes, and the annular sliders are fixedly connected to the second air supply disc.

[0008] As a further optimized solution of the present invention, the joints of every two groups of the air supply pipes are connected by elbow pipes, so that the air supply pipes form an annular S-shaped structure, and both ends of the air supply pipes penetrate through the first air supply disc and are connected to the inside of the first air supply disc.

[0009] As a further optimized solution of the present invention, a jacking mechanism is provided at one end of the core mold away from the rotating base. The jacking mechanism includes a jacking block. The jacking block is arranged at one end of the core mold away from the rotating base. An activity groove is opened inside the core mold, and a jacking rod is slidably connected in the activity groove. The jacking block and the jacking rod are fixedly connected. A connecting rod is also slidably connected in the activity groove, and the connecting rod is fixedly connected to the jacking rod. A first spring is also arranged outside the connecting rod, and both ends of the first spring are fixedly connected to the jacking rod and the activity groove respectively.

[0010] As a further optimized solution of the present invention, a connecting frame is installed on the base. A connecting shaft is connected to the connecting frame by a bearing, and a cam is installed on the connecting shaft. The side of the cam close to the base is arranged in an inclined shape. One end of the connecting rod away from the jacking rod passes through the base and is provided with a movable ball.

[0011] As a further optimized solution of the present invention, an extension rod is installed at one end of the lead screw away from the positioning unit, and the extension rod passes through the base and is connected to the connecting frame by a bearing. A first gear is arranged at one end of the extension rod away from the lead screw, and the first gear is connected to the extension rod through a one-way bearing. A second gear is installed on the connecting shaft, and the second gear is meshed with the first gear.

[0012] As a further optimized solution of the present invention, a lubricating mechanism is arranged on the jacking block. The lubricating mechanism includes an oil cavity opened inside the jacking block, and the oil cavity is arranged in an annular structure. A plurality of activity cavities are uniformly distributed in an annular shape on the oil cavity, and an activity column is slidably connected in the activity cavity. A second spring is arranged inside the activity cavity. A sliding sleeve is slidably connected inside the activity column, and the sliding sleeve is fixedly connected to the activity cavity. A sponge rod is arranged inside the sliding sleeve.

[0013] As a further optimized solution of the present invention, a rolling groove is opened at one end of the activity column away from the oil cavity, and a rolling ball is rotatably connected in the rolling groove.

[0014] As a further optimized solution of the present invention, one end of the sponge rod away from the rolling ball extends into the oil cavity. A convex portion is arranged at one end of the sponge rod close to the rolling ball, so as to facilitate the contact between the rolling ball and the sponge rod and provide lubricating oil for the rolling ball.

[0015] As a further optimized solution of the present invention, an oil injection port is provided on the top block, and a sealing plug is provided in the oil injection port.

[0016] The beneficial effects of the present invention are as follows: In the present invention, the first air supply disk rotates synchronously with the core mold, and the second air supply disk is slidably connected to the first air supply disk through an annular slider, realizing the input of cold air sealing in a rotating state. The external cold source enters the chamber of the first air supply disk through the connecting pipe and is evenly distributed through the annular S-shaped air supply pipe in the inner wall sandwich of the core mold. Among them, on the one hand, the cooling air flow is directly sprayed onto the surface of the core mold and the inner wall of the workpiece through the nozzles and air flow openings on the air supply pipe, forming forced convection cooling on the surface; on the other hand, when flowing inside the air supply pipe, the core mold body is conductively cooled through the heat conduction of the metal wall surface, realizing the two-way temperature control of cooling the inside of the core mold and the surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a top view structural schematic diagram of the present invention; Figure 3 is a sectional structural schematic diagram of the present invention; Figure 4 is a partial three-dimensional structural schematic diagram of the present invention; Figure 5 in the present invention Figure 4 three-dimensional sectional structural schematic diagram; Figure 6 is a three-dimensional structural schematic diagram of the rotating base and the core mold of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the cooling mechanism of the present invention; Figure 8 is a sectional three-dimensional structural schematic diagram of the ejection mechanism of the present invention; Figure 9 in the present invention Figure 8 enlarged view of the structure at position A; Figure 10 in the present invention Figure 8 enlarged view of the structure at position B; Figure 11 is a sectional structural schematic diagram of the lubrication mechanism of the present invention.

[0018] In the figure: 111, workbench; 112, base; 113, rotating base; 114, core mold; 115, first motor; 116, first pulley drive mechanism; 117, lead screw; 118, spinning unit; 119, second motor; 120, second pulley drive mechanism; 121, positioning unit; 122, connecting frame; 211, first air supply disk; 212, second air supply disk; 213, connecting pipe; 214, annular slider; 215, air supply pipe; 216, nozzle; 217, air flow opening; 311, top block; 312, ejector rod; 313, connecting rod; 314, first spring; 315, connecting shaft; 316, cam; 317, movable ball; 318, extension rod; 319, first gear; 320, one-way bearing; 321, second gear; 411, oil cavity; 412, movable cavity; 413, movable column; 414, ball; 415, second spring; 416, sliding sleeve; 417, sponge rod; 418, sealing plug. Detailed implementation manners

[0019] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and that changes may be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example may omit, substitute, or add various processes or components as needed. Additionally, features described relative to some examples may be combined in other examples.

[0020] According to Figure 1 , Figure 2 and Figure 3 As shown in

[0021] A bearing on the workbench 111 is connected to a lead screw 117, and a nut pair is threadedly connected to the lead screw 117. A spinning unit 118 is slidably connected to the workbench 111, and the spinning unit 118 is fixedly connected to the nut pair. A second motor 119 is also installed on the workbench 111, and the output shaft of the second motor 119 is connected to the lead screw 117 through a second pulley transmission mechanism 120. Specifically, when the second motor 119 is controlled to rotate, the lead screw 117 is driven to rotate through the action of the second pulley transmission mechanism 120, and the spinning unit 118 is driven to move on the workbench 111 through the threaded connection between the lead screw 117 and the nut pair.

[0022] The workbench 111 is also provided with a positioning unit 121 for positioning and fixing the cylindrical part to be processed.

[0023] It should be understood that the cylindrical part to be processed is placed on the core mold 114, and the cylindrical part will move synchronously under the drive of the core mold 114, providing rotation conditions for the subsequent spinning process. At the same time, the spinning unit 118 can be moved to a suitable position to spin the rotating cylindrical part. After the cylindrical part is placed on the core mold 114, the positioning unit 121 can squeeze and fix the cylindrical part to be processed, ensuring that the position of the cylindrical part on the core mold 114 is accurate and fixed, avoiding displacement or shaking of the cylindrical part during the spinning process, and ensuring the accuracy of the spinning process. When the cylindrical part reaches the desired shape and size, stop the operation of the first motor 115 and the second motor 119, and the spinning process ends. Finally, release the positioning unit 121 to fix the cylindrical part, remove the processed large diameter-thickness ratio nickel alloy cylindrical part from the core mold 114, and complete the entire processing process.

[0024] according to Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, a cooling mechanism is provided on the core mold 114, and the cooling mechanism includes a first air supply disk 211 installed between the rotating base 113 and the core mold 114, and the first air supply disk 211 is rotatably connected to the second air supply disk 212, and a connecting pipe 213 is installed on the second air supply disk 212. A chamber is opened inside the first air supply disk 211, and an annular groove is opened on both sides of the chamber, an annular slider 214 is slidably connected in the annular groove, and the annular slider 214 is fixedly connected to the second air supply disk 212.

[0025] Specifically, through the sliding connection between the annular slide groove and the annular slider 214, when the connecting pipe 213 is connected to the external cooling device, the first air supply disk 211 can rotate along with the core mold 114 while the second air supply disk 212 supplies cold air to the interior of the first air supply disk 211, thereby facilitating cooling of the core mold 114.

[0026] Among them, according to Figure 7 and Figure 8 As shown, an inner wall sandwich layer is provided inside the core mold 114, and air supply pipes 215 are annularly distributed in the inner wall sandwich layer. The connection points of every two groups of air supply pipes 215 are connected by elbow pipes, so that the air supply pipes 215 form an annular S-shaped structure. Both ends of the air supply pipes 215 penetrate through the first air supply plate 211 and are connected to the inside of the first air supply plate 211. A number of spray nozzles 216 are provided on the air supply pipes 215, and a number of air circulation openings 217 are provided on the outer surface of the core mold 114, and the air circulation openings 217 penetrate through the inner wall sandwich layer and are connected to the inside of the spray nozzles 216.

[0027] It should be noted that by supplying air to the inside of the air supply pipes 215 through the first air supply plate 211 and the second air supply plate 212, the cooling air flow can be discharged from the spray nozzles 216 and discharged outward through the air circulation openings 217. At the same time, due to the function of the air supply pipes 215 arranged in the inner wall sandwich layer, when the cooling air flow is transported inside the air supply pipes 215, the core mold 114 can also be cooled.

[0028] In summary, when the core mold 114 rotates, the second air supply plate 212 can continuously supply cold air to the first air supply plate 211 through the connecting pipe 213. The cooling air flow is discharged from the spray nozzles 216 through the air supply pipes 215 and acts on the surfaces of the cylindrical part and the core mold 114 through the air circulation openings 217. At the same time, the air supply pipes 215 are arranged in the inner wall sandwich layer of the core mold 114, and the cooling air flow directly cools the core mold 114 when flowing in the pipes. Nickel alloy is prone to generate high temperature due to plastic deformation and friction during the spinning process. This mechanism can effectively reduce the temperatures of the core mold 114 and the cylindrical part, avoid the change of material structure and the decline of performance due to high temperature, reduce the processing error caused by thermal expansion at the same time, extend the service life of the core mold 114, and ensure the stability of the spinning process and the quality of the workpiece.

[0029] According to Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, an ejection mechanism is provided at one end of the core mold 114 away from the rotating base 113. The ejection mechanism includes a top block 311. The top block 311 is arranged at one end of the core mold 114 away from the rotating base 113. An activity groove is provided inside the core mold 114, and a top rod 312 is slidably connected in the activity groove. The top block 311 and the top rod 312 are fixedly connected. A connecting rod 313 is also slidably connected in the activity groove, and the connecting rod 313 is fixedly connected to the top rod 312. A first spring 314 is also provided outside the connecting rod 313, and both ends of the first spring 314 are fixedly connected to the top rod 312 and the activity groove respectively.

[0030] According to Figure 4 As shown, a connecting frame 122 is installed on the base 112.

[0031] Among them, according to Figure 5 and Figure 8 As shown, a connecting shaft 315 is connected to the connecting frame 122 by a bearing, and a cam 316 is installed on the connecting shaft 315. The side of the cam 316 close to the base 112 is inclined. One end of the connecting rod 313 away from the ejector rod 312 passes through the base 112 and is installed with a movable ball 317; when the cam 316 is driven to rotate, the cam 316 contacts the movable ball 317, so that the movable ball 317 moves along the inclined surface, squeezes the connecting rod 313, and the ejector rod 312 ejects the ejector block 311 outwards, so that the tubular part is separated from the core mold 114.

[0032] Specifically, an extension rod 318 is installed at one end of the lead screw 117 away from the positioning unit 121, and the extension rod 318 passes through the base 112 and is connected to the connecting frame 122 by a bearing. A first gear 319 is provided at one end of the extension rod 318 away from the lead screw 117, and the first gear 319 is connected to the extension rod 318 through a one-way bearing 320. A second gear 321 is installed on the connecting shaft 315, and the second gear 321 is meshed with the first gear 319.

[0033] It should be noted that when processing the nickel alloy tubular part, the lead screw 117 is driven to rotate forward, and the spinning unit 118 is driven to move towards the raw material of the tubular part to be processed for spinning. At this time, under the action of the one-way bearing 320, the extension rod 318 rotates inside the first gear 319 and cannot drive the first gear 319 to rotate.

[0034] When the processing of the nickel alloy tubular part is completed, the lead screw 117 is driven to rotate in reverse, so that the spinning unit 118 is reset. At this time, under the action of the one-way bearing 320, the extension rod 318 drives the first gear 319 to rotate. Through the meshing connection between the first gear 319 and the second gear 321, the cam 316 is driven to rotate, so that the cam 316 squeezes the movable ball 317, so that the connecting rod 313 moves, and the ejector rod 312 ejects the ejector block 311 outwards, so that the tubular part is separated from the core mold 114.

[0035] In summary, the inclined surface of the cam 316 squeezes the movable ball 317, drives the connecting rod 313, the ejector rod 312 and the ejector block 311 to eject the tubular part. By using the movement of the lead screw 117 as the power source, no additional driving device is required, and the equipment structure is simplified. After the processing of the tubular part is completed, the workpiece can be separated from the core mold 114 in a timely and stable manner, avoiding the inconvenience and potential danger of manual workpiece taking, and improving production efficiency. At the same time, the one-way bearing 320 ensures that the ejection action is triggered only when the lead screw 117 rotates in reverse, which is closely connected with the spinning process and ensures the continuity of the processing process.

[0036] According toFigure 6 , Figure 10 and Figure 11 As shown in Figure 6 , Figure 10 and Figure 11 , a lubricating mechanism is provided on the top block 311. The lubricating mechanism includes an oil cavity 411 opened inside the top block 311, and the oil cavity 411 is arranged in an annular structure. A plurality of movable cavities 412 are evenly distributed in an annular shape on the oil cavity 411. An movable column 413 is slidably connected inside the movable cavity 412. A rolling groove is opened at one end of the movable column 413 away from the oil cavity 411, and a ball 414 is rotatably connected in the rolling groove. A second spring 415 is provided inside the movable cavity 412. One end of the second spring 415 is fixedly connected to the movable cavity 412, and the other end of the second spring 415 is fixedly connected to the movable column 413. A sliding sleeve 416 is slidably connected inside the movable column 413, and the sliding sleeve 416 is fixedly connected to the movable cavity 412. A sponge rod 417 is arranged inside the sliding sleeve 416, and one end of the sponge rod 417 away from the ball 414 extends into the oil cavity 411. A protruding portion is provided at one end of the sponge rod 417 close to the ball 414, so as to facilitate the contact between the ball 414 and the sponge rod 417 and provide lubricating oil for the ball 414.

[0037] An oil injection port is opened on the top block 311, and a sealing plug 418 is arranged in the oil injection port. Among them, the sealing plug 418 can be threadedly connected with the oil injection port.

[0038] It should be noted that when the cylindrical part is placed on the core mold 114, by extruding the movable column 413, the movable column 413 drives the ball 414 to move, so that the ball 414 contacts the sponge rod 417. By contacting the sponge rod 417 with the lubricating oil, the sponge rod 417 is coated with lubricating oil. When the cylindrical part moves outside the core mold 114, the ball 414 rotates and contacts the cylindrical part, so as to coat the inner wall of the cylindrical part with lubricating oil, which is convenient for taking out and inserting the cylindrical part.

[0039] In summary, the friction between the large diameter-thickness ratio nickel alloy cylindrical part and the core mold 114 is relatively large. This mechanism can effectively reduce the frictional resistance between the two, reduce the scratches on the workpiece surface caused by friction, make the taking out and inserting of the cylindrical part smoother, and reduce the difficulty of taking out the part and the risk of damage; at the same time, the lubricating oil is replenished through the oil injection port, which can protect the surface of the core mold 114 and the cylindrical part for a long time and avoid rust.

[0040] The embodiments of the specific implementation manners have been described above, but the embodiments are not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which belong to the protection scope of this embodiment.

Claims

1. A spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio, characterized in that, Including: A spinning device body, the spinning device body includes a workbench, and a base is installed on the workbench. A rotating base is connected to the base by a bearing, and a core mold is provided on the rotating base. A lead screw is connected to the workbench by a bearing, and a nut pair is threadedly connected to the lead screw. A spinning unit is slidably connected to the workbench, and the spinning unit is fixedly connected to the nut pair. A cooling mechanism, the cooling mechanism includes a first air supply disk installed between the rotating base and the core mold. A second air supply disk is rotatably connected to the first air supply disk. A connecting pipe is installed on the second air supply disk. A chamber is opened inside the first air supply disk. An inner wall interlayer is opened inside the core mold, and air supply pipes are annularly distributed in the inner wall interlayer. A number of nozzles are opened on the air supply pipe. A number of air circulation openings are opened on the outer surface of the core mold, and the air circulation openings pass through the inner wall interlayer and are connected to the inside of the nozzles.

2. The spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 1, characterized in that Annular chutes are opened on both sides of the chamber. Annular sliders are slidably connected in the annular chutes, and the annular sliders are fixedly connected to the second air supply disk.

3. The spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 1, characterized in that, The connections of every two groups of the air supply pipes are connected by elbows, so that the air supply pipes form an annular S-shaped structure. Both ends of the air supply pipe penetrate through the first air supply disk and are connected to the inside of the first air supply disk.

4. The spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 1, characterized in that, An ejection mechanism is provided at one end of the core mold away from the rotating base. The ejection mechanism includes an ejecting block. The ejecting block is arranged at one end of the core mold away from the rotating base. An activity groove is opened inside the core mold, and a ejecting rod is slidably connected in the activity groove. The ejecting block and the ejecting rod are fixedly connected. A connecting rod is also slidably connected in the activity groove, and the connecting rod is fixedly connected to the ejecting rod. A first spring is also arranged outside the connecting rod, and both ends of the first spring are fixedly connected to the ejecting rod and the activity groove respectively.

5. A spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 4, characterized in that, A connecting frame is installed on the base. A connecting shaft is connected to the connecting frame by a bearing, and a cam is installed on the connecting shaft. The side of the cam close to the base is inclined. One end of the connecting rod away from the ejecting rod passes through the base and is provided with a movable ball.

6. The spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 5, characterized in that An extension rod is installed at one end of the lead screw away from the positioning unit, and the extension rod passes through the base and is connected to the connecting frame by a bearing. A first gear is arranged at one end of the extension rod away from the lead screw, and the first gear is connected to the extension rod by a one-way bearing. A second gear is installed on the connecting shaft, and the second gear is meshed with the first gear.

7. A spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 4, characterized in that, A lubricating mechanism is arranged on the ejecting block. The lubricating mechanism includes an oil cavity opened inside the ejecting block, and the oil cavity is annularly structured. A number of activity cavities are annularly and evenly distributed on the oil cavity, and an activity column is slidably connected inside the activity cavity. A second spring is arranged inside the activity cavity. A sliding sleeve is slidably connected inside the activity column, and the sliding sleeve is fixedly connected to the activity cavity. A sponge rod is arranged inside the sliding sleeve.

8. A spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 7, characterized in that, A rolling groove is opened at one end of the activity column away from the oil cavity, and a rolling ball is rotatably connected in the rolling groove.

9. The spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 8, wherein, One end of the sponge rod away from the rolling ball extends into the oil cavity. A protruding part is arranged at one end of the sponge rod close to the rolling ball, so as to facilitate the contact between the rolling ball and the sponge rod and provide lubricating oil for the rolling ball.

10. A spinning device for a nickel alloy cylindrical part with a large diameter-thickness ratio according to claim 7, characterized in that, An oil injection port is provided on the top block, and a sealing plug is provided in the oil injection port.

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