Centrifugal casting machine

Abstract

The utility model relates to the technical field of centrifugal casting equipment, and discloses a centrifugal casting machine which comprises a machine frame, a first motor and a rotary drum, the rotary drum is meshed with a first gear of the first motor through teeth, the machine frame is provided with a second motor driving lead screw to drive a side machine frame to move, and a side shaft clamps a sand core through a connecting assembly and is in linkage with the rotary drum through a plurality of sets of connecting plates. A feeding hole of the side rack is communicated with double pipelines capable of relatively rotating; and the rotary drum side quick release assembly is connected with the sand core. During working, a sand core is quickly positioned through the connecting assembly, forming is accelerated after low-speed liquid injection of the rotary drum, and demolding is achieved by reversely driving the second motor through the quick-release baffle after a casting is cooled. According to the device, the casting process of the special-shaped cylinder of the centrifugal casting machine is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal casting equipment technology, specifically a centrifugal casting machine. Background Technology

[0002] Centrifugal casting machines are special casting equipment that rely on centrifugal force fields to form molten metal. Their technological prototype can be traced back to the mid-19th century. In the mid-20th century, with the development of metallurgy and machinery industries, they completed industrial upgrading and have now evolved into various structural forms such as horizontal, vertical, and inclined types. They are widely used in the production of rotating parts such as large-diameter steel pipes, cylinder liners, rollers, and wind power flanges, and can meet the manufacturing needs of key components in industries such as aerospace, petrochemicals, and power.

[0003] Currently, centrifugal casting machines require the sand core to be assembled with the outer cylinder when casting irregularly shaped cylinders. This is generally done by using a steel core plug or by clamping with a flange. This fixing method is not only difficult to fix, but also inconvenient to replace the sand core, which affects casting efficiency and casting quality. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a centrifugal casting machine, which aims to solve the above-mentioned technical problems.

[0005] This utility model relates to a centrifugal casting machine, comprising a frame, a first motor, and a rotating drum. A first gear is fixedly connected to the output end of the first motor, and the rotating drum is fixedly connected to teeth corresponding to the first gear. The first gear meshes with the rotating drum, which is rotatably connected to the frame. A baffle is provided on one side of the rotating drum, having both a closed and an open state. In the closed state, one side of the baffle is isolated from the outside; in the open state, the casting inside the rotating drum can be removed from the baffle. A second motor is fixedly connected to the frame, and a lead screw is fixedly connected to the output end of the second motor. The lead screw is rotatably connected to the frame and threadedly connected to a side frame. A side shaft is rotatably connected to the side frame, and the side shaft is inserted into the side of the rotating drum away from the baffle. A sand core is detachably connected to the side shaft via a connecting assembly. The side frame is equipped with a feed inlet, which is connected to a first pipe. The first pipe is connected to a second pipe via a sleeve. The first and second pipes can rotate relative to each other. The second pipe is connected to the inside of the rotating drum. A first connecting plate is fixedly connected to the side shaft. The first connecting plate is distributed circumferentially along the side shaft. A second connecting plate corresponding to the first connecting plate is fixedly connected to the rotating drum. The first and second connecting plates can abut against each other. The connecting assembly includes a double-ended bolt and an elastic ring plate. The double-ended bolt includes a smooth rod in the middle and two threaded parts with opposite directions of rotation on both sides. The elastic ring plate is an arc-shaped plate with ear plates at both ends. The threaded parts on both sides of the double-ended bolt are threaded to the two ear plates respectively. The inner side of the elastic ring plate is provided with a stop bar.

[0006] Optionally, the connecting assembly also includes a second gear and a rack meshing therewith, the inner side of which is coaxially fixedly connected to the outer side of the smooth rod portion of the double-ended bolt.

[0007] Optionally, the drum can be detachably connected to the baffle via a quick-release assembly.

[0008] Optionally, the quick-release assembly includes a base, a spring, and a pressure plate. The base is fixedly connected to the rotating cylinder, and both ends of the spring are fixedly connected to the base and the pressure plate, respectively. The pressure plate is slidably connected to the base. The base has a groove, and the baffle has a protrusion corresponding to the groove.

[0009] Optionally, multiple quick-release components are provided, evenly distributed around the circumference of the rotating cylinder.

[0010] Optionally, the first connecting plate and the second connecting plate are provided in multiple sets, evenly distributed around the axial circumference of the rotating cylinder and the side shaft.

[0011] This utility model has the following beneficial effects:

[0012] This invention enables rapid clamping and disassembly of sand cores through the linkage of components such as the elastic ring plate of the connecting assembly; at the same time, multiple sets of circumferentially distributed first and second connecting plates abut against each other between the side shaft and the rotating drum, which can evenly transmit the driving force when the rotating drum rotates, so that the rotating drum and the side shaft rotate together, improve the stability of the equipment operation, effectively avoid the problem of rotating drum shaking or sand core displacement caused by uneven force, and ensure the casting forming accuracy.

[0013] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 4 This is a three-dimensional structural diagram of the connecting component of this utility model;

[0019] Figure 5 This utility model Figure 2 Schematic diagram at point A in the middle.

[0020] The components represented by each number in the attached diagram are listed below: 1. Frame; 2. First motor; 3. Rotary drum; 4. First gear; 5. Tooth; 6. Second motor; 7. Baffle; 8. Lead screw; 9. Side frame; 10. Side shaft; 11. Sand core; 12. Connecting assembly; 13. First connecting plate; 14. Second connecting plate; 15. Double-ended bolt; 16. Elastic ring plate; 17. Ear plate; 18. Support rod; 19. Quick-release assembly; 20. Protrusion; 21. Base; 22. Spring; 23. Pressure plate; 24. Groove; 25. Feed port; 26. First pipe; 27. Second pipe; 28. Second gear; 29. ​​Rack. Detailed Implementation

[0021] Please see Figures 1 to 5 As shown, this utility model is a centrifugal casting machine, including a frame 1, a first motor 2, and a rotating drum 3. A first gear 4 is fixedly connected to the output end of the first motor 2. A tooth 5 corresponding to the first gear 4 is fixedly connected to the rotating drum 3. The first gear 4 meshes with the rotating drum 3. The rotating drum 3 is rotatably connected to the frame 1. A baffle 7 is provided on one side of the rotating drum 3. The baffle 7 has a closed state and an open state. In the closed state, one side of the baffle 7 is isolated from the outside. In the open state, the casting in the rotating drum 3 can be removed from one side of the baffle 7. A second motor 6 is fixedly connected to the frame 1. A lead screw 8 is fixedly connected to the output end of the second motor 6. The lead screw 8 is rotatably connected to the frame 1 and threadedly connected to a side frame 9. A side shaft 10 is rotatably connected to the side frame 9. The side shaft 10 is inserted into the side of the rotating drum 3 away from the baffle 7. A sand core 11 is detachably connected to the side shaft 10 through a connecting assembly 12. The frame 9 is provided with a feed inlet 25, which is connected to a first pipe 26. The first pipe 26 is connected to a second pipe 27 through a sleeve. The first pipe 26 and the second pipe 27 can rotate relative to each other. The second pipe 27 is connected to the inside of the rotating drum 3. A first connecting plate 13 is fixedly connected to the side shaft 10. The first connecting plate 13 is distributed circumferentially along the side shaft 10. A second connecting plate 14 corresponding to the first connecting plate 13 is fixedly connected to the rotating drum 3. The first connecting plate 13 and the second connecting plate 14 can abut against each other. The connecting assembly 12 includes a double-ended bolt 15 and an elastic ring plate 16. The double-ended bolt 15 includes a central smooth rod and two threaded parts with opposite directions of rotation. The elastic ring plate 16 is an arc-shaped plate with ear plates 17 at both ends. The two threaded parts of the double-ended bolt 15 are threadedly connected to the two ear plates 17 respectively. A stop bar 18 is provided on the inner side of the elastic ring plate 16.

[0022] With the above-mentioned device, when the centrifugal casting machine is working, the sand core 11 and the side shaft 10 are first detachably fixed through the connecting assembly 12: by placing the sand core 11 into the corresponding groove in the side shaft 10, and then turning the double-ended bolt 15, the double-ended bolt 15 drives the ear plates 17 at both ends to move towards the smooth part of the double-ended bolt 15. The elastic ring plate 16 deforms and shrinks inward. At this time, the abutment 18 on the inner side of the elastic ring plate 16 abuts against the sand core 11. The abutment 18 passes through the side shaft 10, and the side shaft 10 has a corresponding through hole. The diameter of this through hole is larger than the diameter of the abutment 18, which allows the abutment 18 to make a small range of displacement due to the deformation of the elastic ring plate 16. Continue to turn the double-ended bolt 15 until it cannot be turned by hand, so that the abutment 18 and the sand core 11 are tightly abutted, generating friction and preventing the sand core 11 from moving. Then the second motor 6 is started, and its output end drives the lead screw 8 to rotate. The lead screw 8 drives the threaded side frame 9 to move towards the rotating drum 3, so that the side shaft 10 is inserted into the side of the rotating drum 3 away from the baffle 7. At the same time, the first connecting plate 13 on the side shaft 10 and the second connecting plate 14 on the rotating drum 3 abut against each other, realizing the linkage limit between the side shaft 10 and the rotating drum 3. When the rotating drum 3 rotates, it can drive the side shaft 10 to rotate synchronously. At this time, switch the baffle 7 to the closed state, so that one side of the rotating drum 3 is isolated from the outside. Start the first motor 2. The first motor 2 drives the rotating drum 3 to rotate at a low speed around the frame 1 by meshing the first gear 4 at the output end with the teeth 5 of the rotating drum 3. Then, inject molten metal into the rotating drum 3 through the feed port 25 and gradually accelerate the first motor 2 to the target speed. Under the action of centrifugal force, the molten metal is evenly distributed along the inner wall of the rotating drum 3 and forms a tight bond with the sand core 11. After the molten metal cools and solidifies, stop the first motor 2, switch the baffle 7 to the open state, and start the second motor 6 in the opposite direction so that the side frame 9 drives the side shaft 10 and the sand core 11 to detach from the rotating drum 3 simultaneously, and the formed casting can be taken out.

[0023] Optionally, the connecting assembly 12 also includes a second gear 28 and a rack 29 meshing with it. The inner side of the gear 28 is coaxially fixedly connected to the outer side of the smooth rod portion of the double-ended bolt 15, and the rack 29 is slidably connected to the side shaft 10.

[0024] With the above-mentioned device, the purpose of rotating the double-ended bolt 15 can be achieved by pulling the rack 29. In one embodiment, the rack 29 includes a toothed part and a rod part. The rod part of the rack 29 extends to the outside of the side shaft 10, and a hand grip plate is fixedly connected to the end of the rod part. The operator can control the double-ended bolt 15 to rotate in different directions by pushing and pulling the hand grip plate, thereby achieving the purpose of controlling the sand core 11.

[0025] Optionally, the rotating drum 3 can be detachably connected to the baffle 7 via the quick-release assembly 19.

[0026] Optionally, the quick-release assembly 19 includes a base 21, a spring 22, and a second pressure plate 23. The base 21 is fixedly connected to the rotating cylinder 3. The two ends of the spring 22 are fixedly connected to the base 21 and the second pressure plate 23 respectively. The second pressure plate 23 is slidably connected to the base 21. The base 21 is provided with a groove 24, and the baffle 7 is provided with a protrusion 20 corresponding to the groove 24.

[0027] Using the aforementioned device, first align the baffle 7 with the second pressure plate 23 of the quick-release assembly 19, at which point the protrusion 20 is misaligned with the base 21. The protrusion 20 cannot directly engage with the groove 24. Then, by pressing down the baffle 7, the second pressure plate 23 is compressed, and the spring 22 is compressed. Next, the baffle 7 is rotated, allowing the protrusion 20 to rotate to the lower part of the base 21, aligning with the groove 24. Releasing the baffle 7 allows the spring 22 to move the second pressure plate 23, thereby causing the baffle 7 and the protrusion 20 to move upwards. At this point, the protrusion 20 engages with the groove 24, forming a limit. To remove the baffle 7, first press down the baffle 7 to disengage the protrusion 20 from the groove 24, then rotate the baffle 7 to misalign the protrusion with the base 21 again, allowing the baffle 7 to be removed.

[0028] Optionally, the quick-release assembly 19 is provided in multiple sets, evenly distributed around the circumference of the rotating cylinder 3.

[0029] Optionally, the first connecting plate 13 and the second connecting plate 14 are provided in multiple sets, evenly distributed around the axial circumference of the rotating cylinder 3 and the side shaft 10.

[0030] The above-described device, with its first connecting plate 13 and second connecting plate 14, improves stability and ensures uniform force distribution on both plates. The preferred embodiments of this utility model disclosed above are merely illustrative. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. The selection and detailed description of these embodiments are intended to better explain the principles and practical applications of this utility model, enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal casting machine, comprising a frame (1), a first motor (2), and a rotating drum (3), wherein a first gear (4) is fixedly connected to the output end of the first motor (2), the rotating drum (3) is provided with teeth (5) meshing with the first gear (4), the rotating drum (3) is rotatably connected to the frame (1), and a baffle (7) is connected to one side of the rotating drum (3), characterized in that, The rack (1) is fixedly connected with a second motor (6), the output end of the second motor (6) is fixedly connected with a lead screw (8), the lead screw (8) is rotatably connected with the rack (1) and is threadedly connected with a side rack (9), the side rack (9) is rotatably connected with a side shaft (10), the side shaft (10) is inserted with the rotary drum (3) away from one side of the baffle (7), the side shaft (10) is detachably connected with a sand core (11) through a connecting assembly (12), the side rack (9) is provided with a feeding port (25), the feeding port (25) is communicated with a first pipeline (26), the first pipeline (26) is communicated with a second pipeline (27) through sleeve connection, the first pipeline (26) and the second pipeline (27) can be relatively rotated, and the second pipeline (27) is communicated with the inside of the rotary drum (3); The side shaft (10) is fixedly connected with a first connecting plate (13), the first connecting plate (13) is distributed along the circumference of the side shaft (10), the rotary drum (3) is fixedly connected with a second connecting plate (14) corresponding to the first connecting plate (13), and the first connecting plate (13) and the second connecting plate (14) can abut against each other; The connecting assembly (12) comprises a stud bolt (15) and an elastic ring plate (16), the stud bolt (15) comprises a middle smooth rod part and two opposite threaded parts on the two sides, ears (17) are arranged at the two ends of the stud bolt (15), the two threaded parts of the stud bolt (15) are threadedly connected with the two ears (17) respectively, and the inner side of the elastic ring plate (16) is provided with a resisting rod (18).

2. A centrifugal casting machine according to claim 1, characterized in that: The connecting assembly (12) further comprises a second gear (28) and a rack (29) in meshing connection with the second gear (28), the gear (28) is coaxially and fixedly connected with the outside of the smooth rod part of the stud bolt (15), and the rack (29) is slidably connected with the side shaft (10).

3. A centrifugal casting machine according to claim 1, characterized in that: The rotary drum (3) is detachably connected with the baffle (7) through a quick release assembly (19).

4. A centrifugal casting machine according to claim 3, characterised in that: The quick release assembly (19) comprises a base body (21), a spring (22) and a pressing plate (23), the base body (21) is fixedly connected with the rotary drum (3), the two ends of the spring (22) are fixedly connected with the base body (21) and the pressing plate (23) respectively, the pressing plate (23) is slidably connected with the base body (21), the base body (21) is provided with a groove (24), and the baffle (7) is provided with a protrusion (20) corresponding to the groove (24).

5. A centrifugal casting machine according to claim 4, characterised in that: A plurality of groups of the quick release assembly (19) are uniformly distributed in the axial circumferences of the rotary drum (3).

6. A centrifugal casting machine according to claim 1, characterized in that: A plurality of groups of the first connecting plate (13) and the second connecting plate (14) are uniformly distributed in the axial circumferences of the rotary drum (3) and the side shaft (10).

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