A composite metal ring centrifugal casting device and method

Abstract

The application discloses a composite metal ring centrifugal casting device and method, and relates to the technical field of metallurgy. The device can realize stable centrifugal casting, avoid defects, and is beneficial to metal liquid filling and convenient demolding. The device comprises a vertical centrifugal casting machine, a moving platform, a turnover mechanism and an inclined platform. The vertical centrifugal casting machine comprises a centrifugal casting cylinder and a casting platform arranged at the lower part of the centrifugal casting cylinder. The outer wall of the centrifugal casting cylinder is provided with a clamping block. The lower part of the centrifugal casting cylinder is connected with a first motor through a first rotating shaft. The first motor is located in the casting platform. The moving platform and the inclined platform are respectively located on the two sides of the casting platform. The moving platform is supported below the centrifugal casting cylinder and can drive the centrifugal casting cylinder and the casting platform to move in the horizontal direction. The inclined platform is provided with a clamping groove. The turnover mechanism can drive the centrifugal casting cylinder and the casting platform to turn over. The application also provides a centrifugal casting method based on the above centrifugal casting device.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a centrifugal casting apparatus and method for composite metal rings. Background Technology

[0002] Composite metal rings are formed by combining several metal materials with different physicochemical properties through a specific forming process. Currently, the main methods for preparing composite metal rings include hot extrusion composite, explosive welding composite, cladding welding composite, powder metallurgy composite, surfacing composite, hot rolling composite, and centrifugal casting composite. Among these, centrifugal casting, as a common gravity casting composite method, has been widely used.

[0003] Centrifugal casting is generally carried out on centrifugal casting machines, which are mainly divided into horizontal and vertical centrifugal casting machines. Horizontal centrifugal casting machines are primarily used to produce pipes and sleeves with uniform wall thickness because they facilitate demolding and molten metal filling. Their disadvantage is that the gravity of the molten metal can cause molten metal to "rain" through the casting, leading to defects such as porosity and inclusions. Vertical centrifugal casting machines are very stable during casting and less prone to defects, so they are mainly used to produce ring-shaped and conical ring-shaped castings. Their disadvantages are that the molten metal is not easily filled and the demolding process is more difficult. Summary of the Invention

[0004] The embodiments of this application provide a centrifugal casting apparatus and method for composite metal rings, which can not only achieve stable centrifugal casting and avoid defects, but also facilitate molten metal filling and demolding.

[0005] To achieve the above objectives, one embodiment of this application provides a centrifugal casting apparatus for composite metal rings, including a vertical centrifugal casting machine, a moving platform, a tilting mechanism, and a ramp platform; the vertical centrifugal casting machine includes a centrifugal casting cylinder and a casting platform disposed at the lower part of the centrifugal casting cylinder; a locking block is provided on the outer wall of the centrifugal casting cylinder; the lower part of the centrifugal casting cylinder is connected to a first motor through a first rotating shaft; the first motor is located inside the casting platform; the moving platform and the ramp platform are respectively located on both sides of the casting platform; the moving platform is disposed below the centrifugal casting cylinder and can drive the centrifugal casting cylinder and the casting platform to move in the horizontal direction; a locking groove is provided on the ramp platform; the tilting mechanism can drive the centrifugal casting cylinder and the casting platform to tilt until the locking block on the centrifugal casting cylinder is engaged in the locking groove on the ramp platform.

[0006] Furthermore, the flipping mechanism includes a second motor, a second rotating shaft, a driving bevel gear, and a driven bevel gear; the second motor is located on the side of the moving platform away from the casting platform; the second rotating shaft is located inside the moving platform, with its first end extending out of the moving platform and connected to the second motor, and its second end extending into the casting platform; the driving bevel gear is disposed on the second end of the second rotating shaft; and the driven bevel gear is fixedly connected to the front sidewall of the casting platform.

[0007] Furthermore, the mobile platform is a cuboid, and a shock-absorbing pad is provided between the mobile platform and the centrifugal casting cylinder; the casting platform is a hollow cuboid; a gap is provided between the mobile platform and the casting platform, and the lower surface of the casting platform is higher than the lower surface of the mobile platform.

[0008] Furthermore, an operating platform is provided on the side of the mobile platform; a first hydraulic cylinder is provided between the operating platform and the mobile platform; a first slide rail is provided below the mobile platform, and the mobile platform is slidably connected to the first slide rail.

[0009] Furthermore, the inclined platform is also equipped with a retrieval vehicle, and the front end of the retrieval vehicle is equipped with a retrieval device; the retrieval device includes a spherical shell, a connecting shaft disposed inside the spherical shell, and a plurality of telescopic rods evenly distributed along the connecting shaft in the circumferential direction; the end of the telescopic rod is equipped with a clamp; after the retrieval device extends into the casting, the clamp presses against the inner wall of the casting.

[0010] Furthermore, the clamp is a spherical metal sheet; a rubber ring is fitted around the edge of the spherical segment of the clamp.

[0011] Furthermore, a second slide rail is provided on the inclined platform; the part retrieval vehicle can move along the second slide rail to approach or move away from the vertical centrifugal casting machine.

[0012] Furthermore, the inclined platform is also equipped with a hydraulic lifting device; the hydraulic lifting device is located between the part retrieval vehicle and the vertical centrifugal casting machine; the hydraulic lifting device includes a base and a "V"-shaped support block; a second hydraulic cylinder is provided between the base and the "V"-shaped support block; the upper telescopic end of the second hydraulic cylinder is connected to the "V"-shaped support block, and the lower fixed end is connected to the base.

[0013] Furthermore, the centrifugal casting cylinder includes an outer cylinder and a crucible disposed inside the outer cylinder; the bottom of the outer cylinder is connected to a first rotating shaft; the side wall of the crucible is detachably connected to the side wall of the outer cylinder; and a metal cap is provided over the mouth of the crucible.

[0014] On the other hand, embodiments of this application also provide a printing method based on the above-mentioned centrifugal casting device for composite metal rings, including the following steps: preheating the centrifugal casting cylinder, then pouring in the outer layer molten metal and completing the centrifugal casting of the outer layer metal; after the outer layer metal cools, pouring in the inner layer molten metal and completing the centrifugal casting of the inner layer metal to obtain a composite metal ring casting; moving the moving platform and the casting platform to a preset position to ensure that after the vertical centrifugal casting machine is flipped, the locking block on it can be locked into the locking groove on the inclined platform; flipping the vertical centrifugal casting machine through the flipping mechanism; and taking out the composite metal ring casting.

[0015] This application has the following advantages over the prior art:

[0016] 1. The centrifugal casting apparatus for composite metal rings in this application embodiment, by setting a moving device and a turning device, allows the vertical centrifugal casting machine to be laid down and demolded after stable centrifugal casting by the moving device and the turning device. This not only achieves stable centrifugal casting and avoids defects, but also facilitates the filling of molten metal and makes demolding easier.

[0017] 2. The centrifugal casting device for composite metal rings in this application embodiment is equipped with a pick-up device, a pick-up cart, and a hydraulic lifting device on a ramp platform. After the vertical centrifugal casting machine is laid down, the pick-up device takes out the composite metal ring casting and places it on the hydraulic lifting device. Then, the hydraulic lifting device lowers the composite metal ring casting to be flush with the production line, thereby facilitating subsequent processing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the centrifugal casting device for composite metal rings according to an embodiment of this application;

[0020] Figure 2 This is a top view of the crucible in the centrifugal casting apparatus for composite metal rings according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the connection structure between the moving platform and the casting platform in the centrifugal casting device for composite metal rings according to an embodiment of this application. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the connection structure between the moving platform and the casting platform in the centrifugal casting device for composite metal rings according to an embodiment of this application. Figure 2 ;

[0023] Figure 5 This is a side view of the part-retrieving cart in the centrifugal casting apparatus for composite metal rings according to an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the part-retrieving device in the centrifugal casting apparatus for composite metal rings according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the hydraulic lifting device in the centrifugal casting apparatus for composite metal rings according to an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connections, detachable connections, or integral connections; those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] The embodiments of this application provide a centrifugal casting apparatus for composite metal rings, which combines the advantages of horizontal centrifugal casting machines and vertical centrifugal casting machines. After stable centrifugal casting, the vertical centrifugal casting machine is laid down for demolding, thus solving certain limitations and defects of existing centrifugal casting methods.

[0031] Reference Figure 1 The centrifugal casting device for composite metal rings in this application includes a vertical centrifugal casting machine 1, a moving platform 2, a tilting mechanism 3, an operating platform 4, and a ramp platform 5.

[0032] The vertical centrifugal casting machine 1 includes a centrifugal casting cylinder 11 and a casting platform 12 disposed at the lower part of the centrifugal casting cylinder 11. A retaining block 111 is provided on the outer wall of the centrifugal casting cylinder 11. The lower part of the centrifugal casting cylinder 11 is connected to a first motor (not shown in the figure) via a first rotating shaft 13. The first motor is fixedly connected inside the casting platform 12, and the first rotating shaft 13 is rotatably connected to the casting platform 12. To facilitate the installation of internal components, the casting platform 12 is a hollow cube with an upward-facing opening, and a cover plate (not shown in the figure) is provided at the opening. The casting platform 12 is made of aluminum alloy and can stably support the centrifugal casting cylinder 11. The centrifugal casting cylinder 11 can perform stable centrifugal casting on the casting platform 12 at a speed of 500rpm-700rpm, and the centrifugal casting time is generally 10s.

[0033] Reference Figure 2 Because of the small size of this embodiment, the centrifugal casting cylinder 11 includes an outer cylinder and a crucible 112 disposed inside the outer cylinder. The bottom of the outer cylinder is connected to a first rotating shaft 13, and the opening of the crucible 112 is higher than the opening of the outer cylinder. The sidewall of the crucible 112 is bolted to the sidewall of the outer cylinder. Cleaning the crucible 112 only requires removing the bolts. A metal cap 113 covers the opening of the crucible 112.

[0034] Reference Figure 1 , Figure 3 and Figure 4 The moving platform 2 is a cube. It is supported on the lower left side of the vertical centrifugal casting machine 1. To reduce vibration of the vertical centrifugal casting machine 1, anti-vibration pads 8 are provided between the moving platform 2 and the centrifugal casting cylinder 11. The anti-vibration pads 8 are high-strength standard parts. The operating platform 4 is located on the left side of the moving platform 2, and a first hydraulic cylinder 6 is provided between them. To make the overall structure more compact, a mounting groove 41 is provided in the middle of the right side of the operating platform 4. The fixed end of the first hydraulic cylinder 6 is connected to the side wall of the mounting groove 41, and the telescopic end is connected to the front surface of the moving platform 2, with the middle section fixed to the ground by bolts. Thus, the first hydraulic cylinder 6 can push the moving platform 2 and the casting platform 12 to move horizontally. To reduce friction during sliding, a first slide rail 7 extending in the left-right direction is also provided between the moving platform 2 and the ground.

[0035] An elevator (not shown in the figure) is provided on the upper surface of the operating platform 4. To facilitate the movement of the elevator, a slope is provided on the left side of the operating platform 4. Before casting, the crucible 112 is removed and preheated, then the outer layer of molten metal is poured in, the metal cover 113 is placed on it, and then the crucible 112 is placed on the elevator. The elevator then sends the crucible 112 into the vertical centrifugal casting machine 1 and reliably connects it.

[0036] The tilting mechanism 3 includes a second motor (not shown), a second rotating shaft 31, a driving bevel gear 32, and a driven bevel gear 33. The driven bevel gear 33 meshes with the driving bevel gear 32. The second motor is fixed to the left side of the moving platform 2 via a motor bracket. The second rotating shaft 31 passes horizontally through the moving platform 2, with its left end extending out of the moving platform 2 and connected to the second motor via a coupling 34, and its right end extending into the casting platform 12. The driving bevel gear 32 is connected to the right end of the second rotating shaft 31, and the driven bevel gear 33 is fixed to the front side wall of the casting platform 12. It should be noted that there is a distance between the casting platform 12 and the moving platform 2, and there is also a distance between the moving platform 2 and the first slide rail 7. This distance is preferably sufficient to ensure that the edges of the casting platform 12 are not restricted when the vertical centrifugal casting machine 1 is tilted.

[0037] The left side of the ramp platform 5 has an inclined surface. The inclined surface has a slot 51 that matches the locking block 111 on the centrifugal casting cylinder 11. The flipping mechanism 3 can drive the vertical centrifugal casting machine 1 to flip until the locking block 111 on the centrifugal casting cylinder 11 is locked into the slot 51 on the ramp platform 5. After the vertical centrifugal casting machine 1 flips, the angle between it and the ground is less than 45°, which facilitates demolding.

[0038] Reference Figure 5 A retrieval cart 9 is also slidably connected to the ramp platform 5. The retrieval cart 9 is located to the right of the slot 51. Specifically, the ramp platform 5 is provided with a second slide rail 52 extending in the left-right direction, and the second slide rail 52 adopts a roller guide rail. Thus, the retrieval cart 9 can move along the second slide rail 52 to approach or move away from the vertical centrifugal casting machine 1. The speed of the retrieval cart 9 should not be too fast, generally 0.2 m / s. The length of the guide rail generally does not exceed 1 m.

[0039] Reference Figure 6The front end of the retrieval cart 9 is equipped with a retrieval device 10. The retrieval device 10 faces to the left. The retrieval device 10 includes a spherical shell 101, a connecting shaft 102 connected inside the spherical shell, and four telescopic rods 103 evenly distributed circumferentially on the connecting shaft 102. The ends of the telescopic rods 103 are equipped with clamps 104. After the retrieval cart 9 approaches the overturned centrifugal casting cylinder 11, the retrieval cart 9 drives the retrieval device 10 to extend into the casting, and then controls the four telescopic rods 103 to extend, so that the clamps 104 are pressed against the inner wall of the casting. The body 101 is a bearing seat. In order to make the clamping more reliable, the clamps 104 are spherical metal plates, that is, the top surface of the clamps 104 is part of a sphere, and the bottom surface is a plane. The edge of the spherical cap of the clamps 104 is fitted with a rubber ring.

[0040] Reference Figure 7 A hydraulic lifting device 14 is also installed on the ramp platform 5. The hydraulic lifting device 14 is located between the part-retrieving cart 9 and the vertical centrifugal casting machine 1. The hydraulic lifting device 14 includes a base 141 and a "V"-shaped support block 142. A second hydraulic cylinder 143 is provided between the base 141 and the "V"-shaped support block 142. The upper telescopic end of the second hydraulic cylinder 143 is connected to the "V"-shaped support block 142, and the lower fixed end is connected to the base 141. Specifically, the "V"-shaped support block 142 is composed of two stainless steel alloy blocks with an included angle of 120° connected by bolts. In addition, in order to be applicable to different types of castings, the stainless steel alloy blocks can be at different angles according to different casting shapes to facilitate clamping the castings. In addition, to increase friction, shims can be set on the stainless steel alloy blocks and rubber rings can be fitted on them.

[0041] In summary, the centrifugal casting apparatus of this application, by setting up a casting platform 12, a moving platform 2, and a first slide rail 7, achieves the effect of moving and tilting the vertical centrifugal casting machine. Simultaneously, since the vertical centrifugal casting machine 1 is fixed on the casting platform 12, it promotes stability during centrifugal casting and minimizes metal rain. Furthermore, after casting is completed, the vertical centrifugal casting machine 1 can be tilted for easy demolding. A part-removing device 10 is used for demolding, and the part is lowered to be flush with the production line by a hydraulic lifting device 14, thereby facilitating subsequent assembly line operations, improving production efficiency, and increasing the economic benefits of centrifugally cast composite metal rings.

[0042] On the other hand, embodiments of this application also provide a printing method based on the above-mentioned composite metal ring centrifugal casting apparatus, comprising the following steps:

[0043] S1. Then pour in the outer layer of molten metal, cover with the metal cap 113, and place the crucible 112 on the elevator. The elevator sends the crucible 112 into the vertical centrifugal casting machine 1 and connects it reliably. Then start the first motor until the centrifugal casting of the outer layer of metal is completed.

[0044] S2. After the outer metal layer cools down, pour in the inner metal molten metal, then start the first motor to complete the centrifugal casting of the inner metal layer and obtain the composite metal ring casting.

[0045] S3. The first hydraulic cylinder 6 is activated to move the moving platform 2 and the casting platform 12 to the preset position, ensuring that after the vertical centrifugal casting machine 1 is flipped, the locking block 111 on it can be locked into the locking groove 51 on the inclined platform 5.

[0046] S4. Control the second motor to rotate in sequence, driving the second rotating shaft 31, the driving bevel gear 32 and the driven bevel gear 33 to rotate. At this time, the driven bevel gear 33 drives the vertical centrifugal casting machine 1 to flip, and the locking block 111 is locked into the locking slot 51.

[0047] S5. Control the retrieval trolley 9 to move to the left and approach the vertical centrifugal casting machine 1 until the retrieval device 10 enters the composite metal ring casting. Then control the four telescopic arms 103 to extend until the clamp 104 presses against the inside of the composite metal ring casting. Finally, control the retrieval trolley 9 to move to the right, take out the composite metal ring casting and place it on the hydraulic lifting device 14.

[0048] S6. Control the second hydraulic cylinder 143 in the hydraulic lifting device 14 to lower the height of the composite metal ring casting to be flush with the production line, so as to facilitate the subsequent processes.

[0049] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A centrifugal casting device for composite metal rings, characterized in that, Includes a vertical centrifugal casting machine, a moving platform, a tilting mechanism, and a ramp platform; The vertical centrifugal casting machine includes a centrifugal casting cylinder and a casting platform disposed at the lower part of the centrifugal casting cylinder; a locking block is provided on the outer wall of the centrifugal casting cylinder; the lower part of the centrifugal casting cylinder is connected to a first motor through a first rotating shaft; the first motor is located inside the casting platform; a moving platform and a ramp platform are respectively located on both sides of the casting platform; the moving platform is disposed below the centrifugal casting cylinder and can drive the centrifugal casting cylinder and the casting platform to move in the horizontal direction; a locking groove is provided on the ramp platform; The flipping mechanism can drive the centrifugal casting cylinder and the casting platform to flip until the locking block on the centrifugal casting cylinder is locked into the slot on the inclined platform; The flipping mechanism includes a second motor, a second rotating shaft, a driving bevel gear, and a driven bevel gear; the second motor is connected to the moving platform; the second rotating shaft is located inside the moving platform, with its first end extending out of the moving platform and connected to the second motor, and its second end extending into the casting platform; the driving bevel gear is disposed on the second end of the second rotating shaft; the driven bevel gear is fixedly connected to the front sidewall of the casting platform. The mobile platform is a cuboid, and a shock-absorbing pad is provided between the mobile platform and the centrifugal casting cylinder; the casting platform is a hollow cuboid; there is a gap between the mobile platform and the casting platform, and the lower surface of the casting platform is higher than the lower surface of the mobile platform.

2. The centrifugal casting apparatus for composite metal rings according to claim 1, characterized in that, An operating platform is also provided on the side of the mobile platform; a first hydraulic cylinder is provided between the operating platform and the mobile platform; a first slide rail is provided below the mobile platform, and the mobile platform is slidably connected to the first slide rail.

3. The centrifugal casting apparatus for composite metal rings according to claim 2, characterized in that, The inclined platform is also equipped with a part retrieval vehicle, and the front end of the part retrieval vehicle is equipped with a part retrieval device. The part retrieval device includes a spherical shell, a connecting shaft disposed inside the spherical shell, and a plurality of telescopic rods evenly distributed along the connecting shaft in the circumferential direction. The ends of the telescopic rods are equipped with clamps. After the part retrieval device extends into the casting, the clamps press against the inner wall of the casting.

4. The centrifugal casting apparatus for composite metal rings according to claim 3, characterized in that, The clamp is a spherical metal sheet; a rubber ring is fitted around the edge of the spherical notch of the clamp.

5. The centrifugal casting apparatus for composite metal rings according to claim 4, characterized in that, The inclined platform is provided with a second slide rail; the part retrieval vehicle can move along the second slide rail to approach or move away from the vertical centrifugal casting machine.

6. The centrifugal casting apparatus for composite metal rings according to claim 5, characterized in that, The inclined platform is also equipped with a hydraulic lifting device; the hydraulic lifting device is located between the part retrieval vehicle and the vertical centrifugal casting machine; the hydraulic lifting device includes a base and a "V"-shaped support block; a second hydraulic cylinder is provided between the base and the "V"-shaped support block; the upper telescopic end of the second hydraulic cylinder is connected to the "V"-shaped support block, and the lower fixed end is connected to the base.

7. The centrifugal casting apparatus for composite metal rings according to claim 6, characterized in that, The centrifugal casting cylinder includes an outer cylinder and a crucible disposed inside the outer cylinder; The bottom of the outer cylinder is connected to the first rotating shaft; the side wall of the crucible is detachably connected to the side wall of the outer cylinder; and a metal cap is provided over the mouth of the crucible.

8. A casting method based on the centrifugal casting apparatus for composite metal rings according to any one of claims 1 to 7, characterized in that, Includes the following steps: Preheat the centrifugal casting cylinder, then pour in the outer layer of molten metal, and complete the centrifugal casting of the outer layer of metal; After the outer metal layer cools, the inner metal layer is poured in to complete the centrifugal casting of the inner metal layer, resulting in a composite metal ring casting. Move the mobile platform and casting platform to the preset position to ensure that after the vertical centrifugal casting machine is flipped over, the locking blocks on it can be locked into the slots on the ramp platform. The vertical centrifugal casting machine is flipped using a flipping mechanism; Remove the composite metal ring casting.

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