Centrifugal casting device for high-temperature alloy part

Abstract

The invention relates to the technical field of centrifugal casting, in particular to a high-temperature alloy part centrifugal casting device which comprises a base and a movable seat, a centrifugal barrel is rotatably arranged on the base, the movable seat is movably arranged on the base, and a feeding hopper is arranged on the movable seat; the connecting pipe is fixedly arranged at the bottom of the feeding hopper and used for conveying metal liquid; the guide pipe is fixedly connected with the bottom end of the connecting pipe and used for conveying the metal liquid into the centrifugal cylinder; according to the centrifugal casting device for the high-temperature alloy part, high-temperature gas is utilized to spray metal liquid through the spray head, the temperature of the metal liquid can be kept, the metal liquid is prevented from being solidified too early, the fluidity of the metal liquid can be enhanced, a complex structure in a mold can be better filled, the sprayed metal liquid has a certain initial speed, and the casting quality is improved. The speed difference between the metal liquid and the molding sand layer can be reduced, and damage to the molding sand layer caused by metal scouring is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal casting, in particular to a centrifugal casting device for high-temperature alloy parts. Background Art

[0002] Centrifugal casting is an advanced casting technology that injects molten metal into a mold that rotates at high speed around a specific axis (horizontal, inclined or vertical). The centrifugal force is used to solidify the molten metal and precisely shape it. The axis of the resulting casting perfectly coincides with the axis of the rotating mold. This technology is widely used in the production of castings that require high precision and complex shapes.

[0003] In the existing centrifugal casting process, in order to flexibly meet the needs of workpieces of different sizes and shapes, the mold often uses molding sand to construct a variable molding cavity. This design not only improves the adaptability of the mold, but also reduces the manufacturing cost. However, in the actual operation process, although the high-speed rotation of the mold effectively promotes the distribution and solidification of the molten metal, it also brings a series of challenges.

[0004] Specifically, when the molten metal is introduced into the high-speed rotating mold through the guide tube, the initial outflow velocity of the molten metal is lower than the mold rotation speed, and a significant speed difference is formed between the two. This speed difference causes the molten metal to produce a strong scouring effect when it contacts the molding sand layer. Over time, the molding sand layer in the molding cavity is gradually eroded and worn, seriously affecting the service life of the mold and the quality stability of the casting. For this reason, we propose a centrifugal casting device for high-temperature alloy parts. Summary of the invention

[0005] In order to solve the above technical problems, the embodiment of the present application provides a centrifugal casting device for high-temperature alloy parts, including a base, a centrifugal cylinder rotatably arranged on the base, and also including: A movable seat, movably arranged on the base, wherein a feed hopper is arranged on the movable seat; A connecting pipe is fixedly arranged at the bottom of the feed hopper to transport the metal liquid; A conduit fixedly connected to the bottom end of the connecting pipe and used to transport the metal liquid into the centrifugal cylinder; The gas storage tank and the gas pump are fixedly arranged on the base, and the gas storage tank contains high-temperature gas; The nozzle is arranged at the bottom of the conduit and is connected with the air storage pump and the air pump. The metal liquid can be sprayed out from the nozzle.

[0006] In some embodiments, a guide rail is fixedly disposed on the base, and the movable seat is slidably disposed on the guide rail.

[0007] In some embodiments, a fixed sleeve is fixedly provided on the movable seat, a support rod is slidably provided inside the fixed sleeve, a support spring is connected to the bottom of the support rod, the bottom end of the support spring is fixedly connected to the fixed sleeve, and the top end of the support rod is fixedly connected to the feed hopper.

[0008] In some embodiments, a heat-insulating interlayer is provided in the feed hopper and the connecting pipe, and the heat-insulating interlayer is connected to an air pump, and high-temperature gas is transported into the heat-insulating interlayer through the air pump; The connecting pipe is provided with an air hole, which is located on the upper side wall of the connecting pipe. A conducting mechanism is also arranged inside the connecting pipe to control the conducting and closing of the connecting pipe.

[0009] In some embodiments, a cavity is provided in the conduit, the cavity is connected to the air pump, and a plurality of connecting holes are provided in the conduit, the connecting holes connect the cavity and the conduit, and the bottom of the connecting holes is inclined toward the direction of the flow of the metal liquid.

[0010] In some embodiments, the nozzle is fixedly arranged at the bottom of the conduit, and the nozzle outlet direction is tangent to the bottom of the conduit, a baffle is slidably arranged inside the nozzle, a side plate is fixedly arranged at the bottom end of the baffle, a return spring is arranged on the side plate, and both ends of the return spring are respectively fixedly connected to the side plate and the conduit, and a slot is also opened on the baffle. When the baffle moves, the slot moves into the nozzle, and the nozzle is turned on at this time. A connecting frame is fixedly arranged on the outside of the fixed sleeve, and a horizontal plate is fixedly arranged on the connecting frame. When the conduit moves downward, the baffle is driven to abut against the horizontal plate.

[0011] In some embodiments, the conducting mechanism includes a sealing plate rotatably arranged in a connecting tube, a connecting shaft is fixedly arranged on the sealing plate, the connecting shaft rotates and passes through the connecting tube, a fixing disk is fixedly arranged on the top end of the connecting shaft, a torsion spring is arranged on the outside of the connecting shaft, both ends of the torsion spring are respectively fixedly connected to the fixing disk and the outer wall of the connecting tube, a fixing bar is fixedly arranged on the fixing disk, and a pushing component that can drive the fixing bar to rotate is arranged on the outer wall of the connecting tube.

[0012] In some embodiments, the pushing assembly includes a slide rail fixedly arranged on the outside of the connecting tube, a push rod is slidably arranged in the slide rail, a connecting spring is arranged between the push rod and the slide rail, two ends of the connecting spring are respectively fixedly connected to the slide rail and the push rod, a fixing frame is fixedly arranged on the cross plate, and the fixing frame is located directly above the push rod. When the push rod moves to abut against the fixing frame, the push rod can move in the slide rail, thereby pushing the fixing bar to rotate the fixed disk.

[0013] In some embodiments, the high temperature gas is air.

[0014] In some embodiments, the high temperature gas is nitrogen.

[0015] The present invention has at least the following beneficial effects: 1. Enhance material fluidity: Using high-temperature gas to spray liquid metal through the nozzle can not only maintain the temperature of the liquid metal and prevent it from solidifying prematurely, but also enhance the fluidity of the liquid metal, which helps to better fill the complex structure in the mold. The sprayed liquid metal itself has a certain initial velocity, which can reduce the speed difference between the liquid metal and the sand layer, and effectively avoid damage to the sand layer caused by metal scouring; 2. Temperature control optimization: Insulation interlayers and cavities are set in the feed hopper, connecting pipe and conduit, and high-temperature gas is continuously input through an air pump to ensure the temperature of the metal liquid is stable during the transportation process, reducing casting quality problems caused by temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another structural diagram; Figure 3 For the present invention Figure 1 Schematic diagram of local structure; Figure 4 This is a schematic diagram of the cross-sectional structure of the fixing sleeve of the present invention; Figure 5 For the present invention Figure 3 Schematic diagram of the side section structure; Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting pipe of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle; Figure 8 It is a schematic diagram of the cross-sectional structure of the catheter of the present invention; Fig. 9 It is a schematic diagram of the side section structure of the catheter of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the nozzle of the present invention; Fig.11 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0017] In the figure: 1-base; 2-centrifugal cylinder; 3-conduction mechanism; 31-sealing plate; 32-connecting shaft; 33-fixed disk; 34-torsion spring; 35-fixed bar; 4-lifting assembly; 41-slide rail; 42-lift rod; 43-connecting spring; 44-fixed frame; 5-moving seat; 6-feed hopper; 7-connecting pipe; 8-conduit; 9-gas tank; 10-air pump; 11-nozzle; 12-guide rail; 13-fixed sleeve; 14-support rod; 15-support spring; 16-insulation interlayer; 17-connecting hole; 18-baffle; 19-side plate; 20-reset spring; 21-connecting frame; 22-cross plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1-11 The present invention provides a technical solution: a centrifugal casting device for high-temperature alloy parts, comprising a base 1, a centrifugal cylinder 2 is rotatably arranged on the base 1, the driving structure of the centrifugal cylinder 2 is the prior art and will not be described in detail here, and also comprises a moving seat 5 movably arranged on the base 1, a guide rail 12 is fixedly arranged on the base 1, and the moving seat 5 is slidably arranged on the guide rail 12: A feed hopper 6 is arranged on the movable seat 5, a fixed sleeve 13 is fixedly arranged on the movable seat 5, a support rod 14 is slidably arranged in the fixed sleeve 13, a support spring 15 is connected to the bottom of the support rod 14, the bottom end of the support spring 15 is fixedly connected to the fixed sleeve 13, and the top end of the support rod 14 is fixedly connected to the feed hopper 6; A connecting pipe 7 is provided at the bottom of the feed hopper 6, and the connecting pipe 7 is connected to the feed hopper 6 for conveying the metal liquid. A conduit 8 is fixedly connected to the bottom end of the connecting pipe 7 for conveying the metal liquid to the centrifugal cylinder 2. A gas storage tank 9 and an air pump 10 are fixedly provided on the base 1. The gas storage tank 9 is provided with high-temperature gas. The air pump 10 is connected to the gas storage tank 9 and can convey the high-temperature gas in the gas storage tank 9. A plurality of nozzles 11 are provided at the bottom of the conduit 8, and the nozzles 11 are connected to the gas storage pump 10 and the air pump 10, and the metal liquid can be sprayed out from the nozzles 11.

[0020] The feed hopper 6 and the connecting pipe 7 are both provided with a heat-insulating interlayer 16, which is connected to the air pump 10. The air pump 10 delivers high-temperature gas to the heat-insulating interlayer 16, and the high-temperature gas keeps the temperature in the feed hopper 6 and the connecting pipe 7, thereby preventing the temperature of the metal liquid from dropping when the material is discharged, and ensuring the fluidity of the metal liquid; An air hole is provided on the connecting tube 7, and the air hole is located on the upper side wall of the connecting tube 7. In order to ensure the smooth flow of the metal liquid, the air pressure balance is ensured through the air hole. A conduction mechanism 3 is also provided in the connecting tube 7 to control the conduction and closing of the connecting tube 7, and the conduction mechanism 3 is located on the rear side of the air hole. When the conduction mechanism 3 closes the connecting tube 7, the conduit 8 is also in a closed state.

[0021] A cavity is provided in the conduit 8, and the cavity is connected to the air pump 10. The cavity can also be filled with high-temperature gas, which can keep the temperature of the metal liquid in the conduit 8 and make the metal liquid flow better. A plurality of connecting holes 17 are also provided in the conduit 8, and the connecting holes 17 connect the cavity and the conduit 8. The bottom of the connecting hole 17 is inclined in the direction of the flow of the metal liquid. The high-temperature gas output by the air pump 10 can be ejected from the connecting hole 17, thereby promoting and keeping the metal liquid warm, accelerating the flow of the metal liquid in the conduit 8, and making it quickly and evenly distributed in the conduit 8. In order to enable the metal liquid to flow out through the nozzle 11, the inner cavity of the conduit 8 is divided into multiple sections, and the cross-section of each section is designed to be V-shaped, and the nozzle 11 is located at the bottom of the V-shape, so that the metal liquid will not remain in the conduit 8.

[0022] The nozzle 11 is fixedly arranged at the bottom of the conduit 8, and the outlet direction of the nozzle 11 is tangent to the bottom of the conduit 8. A baffle 18 is slidably arranged in the nozzle 11, and a side plate 19 is fixedly arranged at the bottom end of the baffle 18. A return spring 20 is arranged on the side plate 19. The two ends of the return spring 20 are fixedly connected to the side plate 19 and the conduit 8 respectively. A notch is also provided on the baffle 18. When the baffle 18 moves and drives the notch to move into the nozzle 11, the nozzle 11 is turned on at this time. A connecting frame 21 is fixedly arranged on the outside of the fixed sleeve 13, and a cross plate 22 is fixedly arranged on the connecting frame 21. When the conduit 8 moves downward, the baffle 18 is driven to abut against the cross plate 22. When the conduit 8 continues to move, the baffle 18 will not move. Relative movement occurs between the baffle 18 and the nozzle 11, so that the notch is located in the nozzle 11. At this time, the nozzle 11 is turned on. Conversely, when the return spring 20 drives the baffle 18 to reset, the baffle 18 closes the nozzle 11 again.

[0023] The conducting mechanism 3 includes a sealing plate 31 rotatably arranged in the connecting tube 7, the sealing plate 31 can close the connecting tube 7, a connecting shaft 32 is fixedly arranged on the sealing plate 31, the connecting shaft 32 rotates and passes through the connecting tube 7, a fixing disk 33 is fixedly arranged on the top of the connecting shaft 32, a torsion spring 34 is arranged on the outside of the connecting shaft 32, two ends of the torsion spring 34 are respectively fixedly connected to the fixing disk 33 and the outer wall of the connecting tube 7, a fixing bar 35 is fixedly arranged on the fixing disk 33, and a pushing component 4 capable of driving the fixing bar 35 to rotate is arranged on the outer wall of the connecting tube 7.

[0024] The pushing assembly 4 includes a slide rail 41 fixedly arranged on the outside of the connecting tube 7, a push rod 42 is slidably arranged in the slide rail 41, a connecting spring 43 is arranged between the push rod 42 and the slide rail 41, and the two ends of the connecting spring 43 are respectively fixedly connected to the slide rail 41 and the push rod 42, and a fixing frame 44 is fixedly arranged on the cross plate 22, and the fixing frame 44 is located directly above the push rod 42. When the push rod 42 moves to abut against the fixing frame 44, the push rod 42 can move in the slide rail 41, thereby pushing the fixing bar 35 to rotate the fixed plate 33.

[0025] High-temperature gas is air, which is a widely existing resource in nature and does not require special processing or storage. Therefore, using air as a heating medium can significantly reduce production costs, and air does not produce harmful substances during heating and use. In the centrifugal casting process, the metal raw materials themselves need to be heated to melt them. Therefore, waste heat can be used to heat and store air without consuming resources, which is low in cost.

[0026] In summary, when performing centrifugal casting, it is first necessary to pour the molten metal into the feed hopper 6, and the molten metal flows into the conduit 8 along the connecting pipe 7. During this process, the high-temperature gas in the thermal insulation interlayer 16 and the cavity can play a thermal insulation effect to prevent heat loss from causing the temperature of the molten metal to drop, and the gas ejected from the connecting hole 17 can promote the rapid flow of the molten metal. When the molten metal has all entered the conduit 8, the feed hopper 6 is pressed downward to avoid high-temperature burns. Tools can be used for this step. When the feed hopper 6 moves downward, the push rod 42 no longer abuts the fixing frame 44. At this time, the push rod 42 is reset. Under the action of the torsion spring 34, the connecting shaft 32 and the sealing plate 31 are reset, and the sealing plate 3 1 is used to seal the connecting pipe 7, and then the air pump 10 continuously delivers the high-temperature gas to the conduit 8. At this time, the air pressure in the conduit 8 increases, and the feed hopper 6 can drive the conduit 8 and the nozzle 11 to move when it moves to the baffle 18 abutting the cross plate 22. At this time, the baffle 18 will not move, and the baffle 18 and the nozzle 11 move relative to each other, so that the notch is located in the nozzle 11. At this time, the nozzle 11 is turned on, and under the action of the air pressure in the conduit 8, the metal liquid is ejected, and it has a certain initial velocity and the nozzle 11 is facing along the rotation direction of the centrifugal cylinder 2, so that the speed difference between the metal liquid and the centrifugal cylinder 2 is reduced, effectively avoiding the damage of the molding sand layer due to friction.

[0027] Embodiment 2: Embodiment 2 has the same structure as Embodiment 1, except that nitrogen is used as the high-temperature gas in Embodiment 2. Nitrogen is an inert gas with stable chemical properties and is not easy to react with metals at high temperatures. Therefore, the use of nitrogen can effectively prevent the metal liquid from being oxidized during the transportation and casting process, thereby ensuring the quality of the casting, especially when the raw material is an easily oxidizable metal.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal casting device for high-temperature alloy parts, comprising a base (1), on which a centrifugal cylinder (2) is rotatably arranged, characterized in that: Also included are: A movable seat (5) is movably arranged on the base (1), and a feed hopper (6) is arranged on the movable seat (5); A connecting pipe (7) is fixedly arranged at the bottom of the feed hopper (6) and is used to transport the metal liquid; A conduit (8) is fixedly connected to the bottom end of the connecting pipe (7) and is used to transport the metal liquid into the centrifugal cylinder (2); The gas storage tank (9) and the gas pump (10) are fixedly mounted on the base (1), and high-temperature gas is arranged in the gas storage tank (9); The nozzle (11) is arranged at the bottom of the conduit (8) and is connected to the air storage pump (10) and the air pump (10). The metal liquid can be sprayed out from the nozzle (11).

2. The centrifugal casting device for high temperature alloy parts according to claim 1, characterized in that: A guide rail (12) is fixedly arranged on the base (1), and the movable seat (5) is slidably arranged on the guide rail (12).

3. The centrifugal casting device for high temperature alloy parts according to claim 2, characterized in that: A fixed sleeve (13) is fixedly arranged on the movable seat (5), a support rod (14) is slidably arranged in the fixed sleeve (13), a support spring (15) is connected to the bottom of the support rod (14), the bottom end of the support spring (15) is fixedly connected to the fixed sleeve (13), and the top end of the support rod (14) is fixedly connected to the feed hopper (6).

4. The centrifugal casting device for high temperature alloy parts according to claim 3, characterized in that: The feed hopper (6) and the connecting pipe (7) are both provided with a heat-insulating interlayer (16), the heat-insulating interlayer (16) is connected to the air pump (10), and the high-temperature gas is transported into the heat-insulating interlayer (16) through the air pump (10); The connecting pipe (7) is provided with an air hole, which is located on the upper side wall of the connecting pipe (7). A conducting mechanism (3) is also provided inside the connecting pipe (7) for controlling the conducting and closing of the connecting pipe (7).

5. The centrifugal casting device for high temperature alloy parts according to claim 4, characterized in that: The conduit (8) has a cavity formed therein, the cavity being connected to the air pump (10), and the conduit (8) also has a plurality of connection holes (17) formed therein, the connection holes (17) connecting the cavity and the conduit (8), the bottom of the connection holes (17) being inclined in the direction of flow of the metal liquid.

6. The centrifugal casting device for high temperature alloy parts according to claim 5, characterized in that: The nozzle (11) is fixedly arranged at the bottom of the conduit (8), and the outlet direction of the nozzle (11) is tangent to the bottom of the conduit (8). A baffle (18) is slidably arranged inside the nozzle (11), and a side plate (19) is fixedly arranged at the bottom end of the baffle (18). A return spring (20) is arranged on the side plate (19), and the two ends of the return spring (20) are respectively fixedly connected to the side plate (19) and the conduit (8). A notch is also provided on the baffle (18). When the baffle (18) moves and drives the notch to move into the nozzle (11), the nozzle (11) is turned on. A connecting frame (21) is fixedly arranged on the outside of the fixing sleeve (13), and a horizontal plate (22) is fixedly arranged on the connecting frame (21). When the conduit (8) moves downward, the baffle (18) is driven to abut against the horizontal plate (22).

7. The centrifugal casting device for high temperature alloy parts according to claim 6, characterized in that: The conduction mechanism (3) comprises a sealing plate (31) rotatably arranged in the connecting tube (7); a connecting shaft (32) is fixedly arranged on the sealing plate (31); the connecting shaft (32) rotatably penetrates the connecting tube (7); a fixing plate (33) is fixedly arranged on the top end of the connecting shaft (32); a torsion spring (34) is arranged on the outside of the connecting shaft (32); two ends of the torsion spring (34) are respectively fixedly connected to the fixing plate (33) and the outer wall of the connecting tube (7); a fixing bar (35) is fixedly arranged on the fixing plate (33); and a pushing assembly (4) capable of driving the fixing bar (35) to rotate is arranged on the outer wall of the connecting tube (7).

8. The centrifugal casting device for high temperature alloy parts according to claim 7, characterized in that: The push-up assembly (4) comprises a slide rail (41) fixedly arranged on the outside of the connecting tube (7), a push rod (42) being slidably arranged in the slide rail (41), a connecting spring (43) being arranged between the push rod (42) and the slide rail (41), two ends of the connecting spring (43) being fixedly connected to the slide rail (41) and the push rod (42), respectively, a fixing frame (44) being fixedly arranged on the cross plate (22), the fixing frame (44) being located directly above the push rod (42), and when the push rod (42) moves to abut against the fixing frame (44), the push rod (42) can move in the slide rail (41), thereby pushing up the fixing bar (35) to rotate the fixing plate (33).

9. The centrifugal casting device for high temperature alloy parts according to claim 8, characterized in that: The high temperature gas is air.

10. The centrifugal casting device for high temperature alloy parts according to claim 8, characterized in that: The high temperature gas is nitrogen.

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