Bidirectional centrifugal casting machine

Abstract

The invention relates to the technical field related to casting, in particular to a bidirectional centrifugal casting machine which comprises a shell, a working cavity is formed in the shell, a rotating disc is rotationally arranged on the lower side of the shell, a rotating support is arranged on the upper side of the rotating disc, the rotating support is circumferentially distributed around the axis of the rotating disc, and the rotating support is rotationally provided with a lower mold frame and an upper mold frame. The lower mold frame and the upper mold frame are combined to form a forming cavity, by arranging the shell, the rotating disc, the working cavity, the flow guide body, the lower mold frame and the like, molten metal diffuses towards the periphery through the flow guide body and flows into the forming cavity, and the rotating rotating disc provides flowing power for the molten metal to enter the forming cavity; and product defects caused by incomplete mold filling of the casting can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field related to casting, in particular to a bidirectional centrifugal casting machine. Background Art

[0002] Centrifugal casting machines are divided into three types: horizontal, vertical and inclined. Horizontal centrifugal casting machines are mainly used to cast various tubular castings. In addition, they can cast large-diameter copper rollers for papermaking machines. Vertical centrifugal casting machines are mainly used to produce various annular castings and smaller non-circular castings. Driven by centrifugal force, metal crystallization gradually proceeds from the mold wall to the inner surface of the casting in sequence. It has a certain directional cooling crystallization. Driven by centrifugal force, the metal liquid is thrown to the side wall of the mold, so that casting defects such as pores and shrinkage cavities are bridged under the action of pressure. Similarly, traditional centrifugal casting has some problems. Tube castings often have transverse cracks and incomplete filling in some parts. The main problem solved by this device is how to improve the product filling completeness rate and how to reduce the product transverse cracks. Summary of the invention

[0003] The object of the present invention is to provide a bidirectional centrifugal casting machine for overcoming the above-mentioned defects in the prior art.

[0004] The present invention is achieved through the following technical solutions.

[0005] A bidirectional centrifugal casting machine of the present invention comprises a shell, wherein a working chamber is arranged in the shell, a rotating disk is rotatably arranged at the lower side of the shell, a rotating bracket is arranged at the upper side of the rotating disk, the rotating bracket is circumferentially distributed around the axis of the rotating disk, a rotating groove is arranged in the rotating bracket, a lower mold frame and an upper mold frame are rotatably arranged in the rotating groove of the rotating bracket, a molding chamber is formed by combining the lower mold frame and the upper mold frame, a guide body is arranged at the center position of the rotating disk, a central groove is arranged in the guide body, a guide pipe is circumferentially distributed and connected with the guide body, the guide pipes are respectively connected with the molding chambers, an annular groove is arranged on the wall of the working chamber, an annular body is rotatably arranged in the annular groove, teeth are arranged inside and outside the annular body, an intermediate gear is rotatably arranged on the upper side of the rotating disk, the intermediate gear is circumferentially distributed around the axis of the rotating disk, the intermediate gear is meshed with teeth on the inner side of the annular body, a first bevel gear is arranged on the shaft of the intermediate gear, a second bevel gear is meshed with the first bevel gear, a transmission shaft is connected with the shaft of the second bevel gear, and the inner end of the transmission shaft is connected with the axis center position of the end of the lower mold frame.

[0006] A further technical solution is that the outer shell is provided with a locking groove, the locking groove is connected to the annular slide groove, a locking plate is slidably provided in the locking groove, the inner side of the locking plate is provided with teeth, the teeth of the locking plate can clamp the teeth on the outer side of the annular body, a locking telescopic rod is hingedly provided in one side wall of the locking groove, an extension body is provided on the outer side of the locking plate, and the axis of the locking telescopic rod is rotatably connected to the extension body.

[0007] According to a further technical solution, the outer shell is provided with a power groove, the power groove is connected with the annular groove, a power motor is installed in the power groove, the shaft of the power motor is provided with a driving gear, and the driving gear is meshed with teeth on the outer side of the annular body.

[0008] According to a further technical solution, a pressure relief pipe is connected to the upper side of the upper mold frame, mounting frames are provided on both sides of the upper mold frame and the lower mold frame, the upper and lower mounting frames can be connected to each other, a customized mold is installed in the molding cavity, and the customized mold includes two sets of upper and lower molds.

[0009] According to a further technical solution, a support base is provided at the lower side of the shell, a motor frame is provided at the lower side of the shell, a power motor is installed at the middle position of the motor frame, and the shaft of the power motor is connected to the axis position of the rotating disk.

[0010] According to a further technical solution, an upper cover is provided on the upper side of the shell, a funnel is provided on the upper side of the upper cover, a through groove is provided in the funnel, and the through groove of the funnel is connected to the central groove of the guide body.

[0011] According to a further technical solution, a transmission shaft frame is provided on the upper side of the rotating disk near the transmission shaft, and a hole in the transmission shaft frame is rotatably connected to the transmission shaft.

[0012] Beneficial effects of the present invention:

[0013] A bidirectional centrifugal casting machine of the present invention is provided with a shell, a rotating disk, a working chamber, a flow guide, a lower mold frame, etc. The molten metal diffuses to the surroundings through the flow guide and flows into the molding cavity. The rotating rotating disk provides flow power for the molten metal to enter the molding cavity, which can reduce product defects caused by incomplete filling of the casting. Secondly, the lower mold frame and the upper mold frame rotate in the rotating bracket, so that the metal liquid is thrown to the side wall of the casting mold, so that the casting defects such as pores and shrinkage holes are bridged under the action of pressure, thereby retaining the advantages of the traditional centrifugal casting machine.

[0014] The device can control the annular body to rotate or lock in the annular slide groove by arranging a locking groove and a locking plate. When the annular body is locked, the locking telescopic rod rotates, and at this time, the bidirectional centrifugal movement is started. It is used for casting solid products, and the advantage is that the generation of transverse cracks is reduced. When the annular body is released, the annular body actively moves to drive the lower mold frame and the upper mold frame to rotate, and the rotating disk stops rotating. This mode is suitable for the production of pipes and shell products with hollow structures, thereby greatly improving the adaptability of the present invention.

[0015] When the locking plate releases the lock on the annular body, a power motor and a driving gear are set, and the driving gear drives the annular body to rotate actively. By controlling the speed of the rotation direction of the annular body, the rotation speed of the lower mold frame and the upper mold frame can be controlled separately, and it can be independent of the rotation speed of the rotating disk to adapt to the requirements of different metals and different product sizes. Similarly, by adjusting the rotation speed of the rotating disk and the annular body, the rotation speed of the rotating disk can be adjusted separately while keeping the rotation state of the lower mold frame and the upper mold frame unchanged, so as to control the axial pressure of the molten liquid inside the molding cavity along the molding cavity separately, thereby reducing the generation of defects such as air holes and shrinkage holes in the product in this direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at AA in the middle;

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 5 yes Figure 2 Schematic diagram of the enlarged structure of D in the middle;

[0023] Figure 6 yes Figure 2 Schematic diagram of the enlarged structure of EE; DETAILED DESCRIPTION

[0024] Combine the following Figure 1-6 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are the same as Figure 1 The up-down, left-right, front-back directions of the projection relationship itself are consistent.

[0025] Combined with Figure 1-6 The bidirectional centrifugal casting machine comprises a shell 13, a working chamber 36 is arranged in the shell 13, a rotating disk 35 is rotatably arranged at the lower side of the shell 13, a rotating bracket 18 is arranged on the upper side of the rotating disk 35, the rotating bracket 18 is circumferentially distributed around the axis of the rotating disk 35, a rotating groove is arranged in the rotating bracket 18, a lower mold frame 19 and an upper mold frame 39 are rotatably arranged in the rotating groove of the rotating bracket 18, a molding cavity 20 is formed by combining the lower mold frame 19 and the upper mold frame 39, a guide body 21 is arranged at the center of the rotating disk 35, a central groove is arranged in the guide body 21, the guide body 21 is circumferentially distributed and connected with a guide pipe 22, the guide pipe The flow tubes 22 are respectively connected to the forming cavities 20, and the wall of the working cavity 36 is provided with an annular groove 16, and an annular body 17 is rotatably provided in the annular groove 16. The annular body 17 is provided with teeth inside and outside. An intermediate gear 30 is rotatably provided on the upper side of the rotating disk 35, and the intermediate gear 30 is distributed around the circumference of the axis of the rotating disk 35. The intermediate gear 30 is meshed with the teeth on the inner side of the annular body 17, and the shaft of the intermediate gear 30 is provided with a first bevel gear 31, and the first bevel gear 31 is meshed with a second bevel gear 32, and the shaft of the second bevel gear 32 is connected with a transmission shaft 34, and the inner end of the transmission shaft 34 is connected to the axial position of the end of the lower mold frame 19.

[0026] The molten metal is injected into the guide body 21, and the rotating disk 35 rotates in the working chamber 36. The rotating disk 35 drives the lower mold frame 19 and the upper mold frame 39 to rotate, and the annular body 17 is locked. The rotating disk 35 drives the surrounding intermediate gear 30 to rotate relative to the annular body 17, and the intermediate gear 30 drives the first bevel gear 31 to rotate, and the first bevel gear 31 drives the second bevel gear 32 to rotate, and the second bevel gear 32 drives the transmission shaft 34 to rotate, and the transmission shaft 34 drives the lower mold frame 19 and the upper mold frame 39 to rotate in the rotating groove of the rotating bracket 18, thereby realizing the two-way rotation function. The molten metal enters the molding cavity 20 through the guide tube 22, and moves to the outside of the molding cavity 20 under the action of centrifugal force, so that the molten metal fills the molding cavity 20. On the one hand, it avoids incomplete filling of the local position of the molding cavity 20 and avoids defects in the casting. On the other hand, it allows the metal to start to cool during the cooling process. Finally, it is subjected to the centrifugal force along the axial direction of the molding cavity 20, reducing the generation of transverse cracks in the casting. The lower mold frame 19 and the upper mold frame 39 rotate in the rotating bracket 18 to drive the molten metal to rotate around the axis of the molding cavity 20, thereby reducing the existence of pores. When the rotating disk 35 is locked and does not rotate, the annular body 17 rotates in the annular groove 16, the annular groove 16 drives the intermediate gear 30 and the first bevel gear 31 to rotate, and the first bevel gear 31 drives the transmission shaft 34 and the lower mold frame 19 and the upper mold frame 39 to rotate in the rotating bracket 18 through the second bevel gear 32. At this time, only the rotation of the lower mold frame 19 is retained. In this mode, it returns to the traditional centrifugal casting function and is suitable for manufacturing pipe and shell castings. Similarly, when the molten metal is injected into the molding cavity 20, the rotating disk 35 rotates appropriately to increase the speed at which the molten metal is filled into the molding cavity 20, avoiding the defect of incomplete filling of pipe and shell castings.

[0027] Preferably, the outer shell 13 is provided with a locking groove 23, and the locking groove 23 is connected to the annular slide groove 16. A locking plate 24 is slidably provided in the locking groove 23, and teeth are provided on the inner side of the locking plate 24. The teeth of the locking plate 24 can clamp the teeth on the outer side of the annular body 17. A locking telescopic rod 25 is hingedly provided in one side wall of the locking groove 23, and an extension body 26 is provided on the outer side of the locking plate 24. The axis of the locking telescopic rod 25 is rotatably connected to the extension body 26.

[0028] The locking telescopic rod 25 is extended and retracted to drive the locking plate 24 to slide in the locking groove 23. When the locking telescopic rod 25 is extended, the locking plate 24 approaches the outside of the annular body 17 until the teeth on the inside of the locking plate 24 are stuck with the teeth on the outside of the annular body 17, thereby achieving the function of locking the annular body 17 and the shell 13.

[0029] Preferably, the housing 13 is provided with a power groove 27 , the power groove 27 is connected to the annular slide groove 16 , a power motor 28 is installed in the power groove 27 , the shaft of the power motor 28 is provided with a driving gear 29 , and the driving gear 29 meshes with the teeth on the outer side of the annular body 17 .

[0030] The power motor 28 drives the driving gear 29 to rotate, and the driving gear 29 drives the annular body 17 to rotate in the annular slide groove 16 . The power motor 28 provides power for the rotation of the annular body 17 .

[0031] Preferably, a pressure relief pipe 40 is connected to the upper side of the upper mold frame 39, and mounting frames 38 are provided on both sides of the upper mold frame 39 and the lower mold frame 19. The upper and lower mounting frames 38 can be connected to each other, and a customized mold 41 is installed in the molding cavity 20, and the customized mold 41 includes two sets of upper and lower molds.

[0032] The customized mold 41 is installed in the molding cavity 20. The shape of the inner cavity of the customized mold 41 can be customized as needed to cast precision products with different shapes. The two sets of mounting frames 38 can connect and seal the upper mold frame 39 and the lower mold frame 19, and the pressure relief pipe 40 plays the function of exhausting and discharging.

[0033] Preferably, a support base 10 is provided at the lower side of the shell 13 , a motor frame 12 is provided at the lower side of the shell 13 , a power motor 11 is installed at the middle position of the motor frame 12 , and the shaft of the power motor 11 is connected to the axis position of the rotating disk 35 .

[0034] The support base 10 supports the device, the power motor 11 provides power for the rotation of the rotating disk 35, and the motor frame 12 plays the function of supporting and installing the power motor 11.

[0035] Preferably, an upper cover 14 is provided on the upper side of the housing 13 , a funnel 15 is provided on the upper side of the upper cover 14 , a through groove is provided in the funnel 15 , and the through groove of the funnel 15 is connected to the central groove of the guide body 21 .

[0036] The upper cover 14 can cover the upper opening of the outer shell 13 to reduce the conduction of high temperature in the outer shell 13 to the outside and protect the operator. The funnel 15 has the function of guiding the molten metal to the central groove of the guiding body 21.

[0037] Preferably, a transmission shaft frame 33 is provided on the upper side of the rotating disk 35 near the transmission shaft 34 , and a hole of the transmission shaft frame 33 is rotatably connected to the transmission shaft 34 .

[0038] The transmission shaft frame 33 is rotatably connected to the transmission shaft 34 , and the transmission shaft frame 33 plays the function of replicating and supporting the transmission shaft 34 .

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A bidirectional centrifugal casting machine, comprising a housing, characterized in that: The cam is provided with a plurality of gears, and the plurality of gears are connected to each other by a plurality of gears, and the plurality of gears are connected to each other by a plurality of gears.

2. A bidirectional centrifugal casting machine according to claim 1, characterized in that: The outer shell is provided with a locking groove, and the locking groove is connected with the annular sliding groove. A locking plate is slidably provided in the locking groove, and teeth are provided on the inner side of the locking plate. The teeth of the locking plate can clamp the teeth on the outer side of the annular body. A locking telescopic rod is hingedly provided in one side wall of the locking groove, and an extension body is provided on the outer side of the locking plate. The axis of the locking telescopic rod is rotatably connected to the extension body.

3. A bidirectional centrifugal casting machine according to claim 1, characterized in that: The shell is provided with a power groove, the power groove is communicated with the annular slide groove, a power motor is installed in the power groove, the shaft of the power motor is provided with a driving gear, and the driving gear is meshed with teeth on the outer side of the annular body.

4. A bidirectional centrifugal casting machine according to claim 1, characterized in that: A pressure relief pipe is connected to the upper side of the upper mold frame, and mounting frames are provided on both sides of the upper mold frame and the lower mold frame. The upper and lower mounting frames can be connected to each other. A customized mold is installed in the molding cavity, and the customized mold includes two sets of upper and lower molds.

5. A bidirectional centrifugal casting machine according to claim 1, characterized in that: A supporting base is provided at the lower side of the shell, a motor frame is provided at the lower side of the shell, a power motor is installed at the middle position of the motor frame, and the shaft of the power motor is connected to the axis center position of the rotating disk.

6. A bidirectional centrifugal casting machine according to claim 1, characterized in that: An upper cover is provided on the upper side of the shell, a funnel is provided on the upper side of the upper cover, a through groove is provided in the funnel, and the through groove of the funnel is connected to the central groove of the guide body.

7. A bidirectional centrifugal casting machine according to claim 1, characterized in that: A transmission shaft frame is provided on the upper side of the rotating disk near the transmission shaft, and a hole of the transmission shaft frame is rotatably connected to the transmission shaft.

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