A mold conveying device for centrifugal casting

Abstract

This invention belongs to the field of centrifugal casting equipment and proposes a mold conveying device for centrifugal casting, including multiple sections of ground rails and multiple level cars. The level cars are used to carry a turnover device, a mold feeding device, and a mold unloading device. There are at least two turnover devices. One turnover device operates on a ground rail distributed along the Y-axis and is correspondingly connected to the mold feeding device. The other turnover device is correspondingly connected to the mold unloading device, and both are located on ground rails along the same X-axis. The ground rails of the mold feeding device are distributed along the X-axis parallel to the ground rails of the mold unloading device. The mold feeding device drives the mold to rotate around the X and Z axes and to translate along the Y-axis. The mold unloading device is used to clamp the mold and rotate around the Y-axis. This device has a reasonable design, simple structure, high mold loading and unloading efficiency, improves mold turnover efficiency, reduces workload, and improves casting efficiency, making it suitable for large-scale promotion.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal casting equipment and relates to a mold conveying device for centrifugal casting. Background Technology

[0002] Centrifugal casting is a technique and method in which molten metal is injected into a high-speed rotating mold, causing the molten metal to fill the mold and form a casting through centrifugal motion. Because centrifugal motion allows the molten metal to fill the mold radially and form a free surface on the casting, a cylindrical inner hole can be obtained without a core. This facilitates the removal of gases and inclusions from the molten metal, influencing the metal's crystallization process and thus improving the mechanical and physical properties of the casting. Based on the spatial position of the mold's axis of rotation, centrifugal casting can be commonly divided into horizontal centrifugal casting and vertical centrifugal casting. Horizontal centrifugal casting refers to centrifugal casting where the mold's axis of rotation is horizontal or at a very small angle (4°) to the horizontal. Vertical centrifugal casting refers to centrifugal casting where the mold's axis of rotation is vertical.

[0003] Currently, horizontal centrifugal casting equipment is commonly used in workshops producing hobbing cutter rings. The molds used for centrifugal casting typically undergo heat treatment in a furnace before being loaded onto the machine. After the previous centrifugal casting cycle, the molds, along with the finished products, need to be removed from the centrifuge. These steps are repeated in each casting cycle. Generally, the workshop is equipped with a turnover platform and overhead cranes. However, there is a problem with low efficiency in the mold loading and unloading operations, resulting in reduced mold turnover efficiency within the casting workshop and hindering the improvement of overall production efficiency. Summary of the Invention

[0004] This invention addresses the technical problems existing in the centrifugal casting equipment mentioned above by proposing a centrifugal casting mold receiving and conveying device that is reasonably designed, has high connection efficiency for mold picking and placing, is conducive to improving mold turnover efficiency, reduces workload, and improves casting efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a mold conveying device for centrifugal casting, comprising multiple sections of ground rails connected to the centrifugal casting machine. Multiple leveling carts are mounted on the ground rails, which are used to carry a turnover device, a mold feeding device, and a mold unloading device. The number of turnover devices is at least two. One turnover device operates on a ground rail distributed along the Y-axis, correspondingly connected to the mold feeding device and clamping the mold to rotate around the X-axis. The other turnover device is correspondingly connected to the mold unloading device, and both are located on ground rails along the same X-axis. The ground rails of the mold feeding device are distributed along the X-axis parallel to the ground rails of the mold unloading device. The mold feeding device drives the mold to rotate around the X-axis and Z-axis, and to translate along the Y-axis. The mold unloading device is used to clamp the mold and rotate around the Y-axis.

[0006] Preferably, the turnover device includes a hydraulic expansion clamp, which is mounted on a hydraulic base. The hydraulic base has bearing seats axially connected to both ends, and a turnover drive motor that is connected to the hydraulic base is mounted on one side of the bearing seats.

[0007] Preferably, the hydraulic expansion clamp includes a hydraulic cylinder connected to a hydraulic base. A mounting seat is provided on the top of the hydraulic cylinder. A spindle connected to the movable end of the hydraulic cylinder is provided at the center of the mounting seat. A tapered guide cylinder is sleeved on the spindle. Multiple clamping claws rotatably connected to the mounting seat are provided on the outer side of the guide cylinder. A spring is provided between the end of the clamping claw and the mounting seat.

[0008] Preferably, the mold feeding device includes a main spindle motor and a main spindle. The power output end of the main spindle faces upward and is provided with a transmission seat. A U-shaped connecting shaft is provided on the transmission seat and is in a horizontal state. One side of the connecting shaft passes through the transmission seat and is keyed to the transmission seat. A transmission thread pair is provided at the center of the connecting shaft. A first motor is provided at the end of the transmission thread pair. A second motor is provided on the other side of the connecting shaft. The output shaft of the second motor passes through the connecting shaft and is provided with a flange shaft at its end. A clamping seat is provided at the end of the flange shaft, which is distributed opposite to the transmission seat. The clamping seat is used to cooperate with the mold.

[0009] Preferably, the clamping seat includes a U-shaped side plate, the inside of which is provided with clamping strips distributed along a U-shaped trajectory on its inner wall, and the side plate is provided with a U-shaped support plate on its side facing the transmission seat.

[0010] Preferably, the transmission threaded pair includes a threaded hole located at the center of the connecting shaft, a piston that rotates and engages with the threaded hole, and a piston shaft is provided between the piston and the first motor.

[0011] Preferably, the demolding device includes a support frame, with support panels on both sides of the support frame. A flipping mechanism for demolding is provided on the support panels. The flipping mechanism includes a pair of flipping motors. Each output end of the two flipping motors is provided with a pair of meshing flipping gears and a backstop gear ring. The backstop gear ring is located inside the half-shaft. A flipping seat connected to the flipping gear is provided at the end of the half-shaft away from the flipping gear. A demolding shaft is provided at the end of the flipping seat facing away from the half-shaft. A sliding plate is provided below the flipping mechanism, and the sliding plate is slidably engaged with the support frame.

[0012] Preferably, the support frame includes two pairs of horizontal tubes distributed vertically, with spaced vertical tubes between the horizontal tubes on the same side, four vertical tubes at the top of the horizontal tubes, and two pairs of top tubes arranged in a U-shape at the top of the vertical tubes, with each support door panel positioned between the vertical tubes on the same side.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0014] 1. This invention provides a mold conveying device for centrifugal casting. A mold feeding device, which receives a mold retrieved from a furnace by a crane, can move along a ground track. This device can connect with a transfer device via multi-directional rotation. The transfer device receives the mold from the feeding device and can rotate it 180 degrees, carrying the mold to the centrifugal casting machine. Another transfer device retrieves a mold containing the finished product from the centrifugal casting machine and rotates it 180 degrees. A mold unloading device, connected to the transfer device, can remove the mold along with the product, thus achieving motorized mold unloading. This device is rationally designed, simple in structure, has high mold loading and unloading efficiency, improves mold turnover efficiency, reduces workload, and increases casting efficiency, making it suitable for large-scale promotion. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A top view of a mold conveying device for centrifugal casting provided in an embodiment;

[0017] Figure 2 Isometric view of the turnover device and mold feeding device provided in the embodiment;

[0018] Figure 3 Isometric views of the turnover device and the demolding device provided in the embodiment;

[0019] Figure 4 A cross-sectional view of the hydraulic expansion fixture provided in the embodiment;

[0020] Figure 5 An isometric view of the mold feeding and mounting device provided in the embodiment;

[0021] Figure 6 A front view of the mold feeding device provided in the embodiment;

[0022] Figure 7 A cross-sectional view of the mold feeding device provided in the embodiment along the GG direction;

[0023] Figure 8 A front view of the demolding device is provided for the embodiment;

[0024] Figure 9 A cross-sectional view of the demolding device along the HH direction is provided for the embodiment;

[0025] In the above figures:

[0026] 1. Ground track;

[0027] 2. Centrifugal casting machine;

[0028] 3. Leveling cart;

[0029] 4. Turnover device; 41. Hydraulic expansion clamp; 411. Hydraulic cylinder; 412. Mounting base; 413. Mandrel; 414. Guide cylinder; 415. Clamping claw; 416. Spring; 42. Hydraulic base; 43. Bearing housing; 44. Turnover drive motor;

[0030] 5. Mold feeding device; 51. Main spindle motor; 52. Main spindle; 53. Transmission seat; 54. Connecting shaft; 55. Transmission threaded pair; 551. Threaded hole; 552. Piston; 553. Piston shaft; 56. First motor; 57. Second motor; 58. Flange shaft; 59. Clamping seat; 591. Side plate; 592. Clamping bar; 593. Support plate;

[0031] 6. Demolding device; 61. Support frame; 611. Horizontal tube; 612. Spacing vertical tube; 613. Vertical tube; 614. Top tube; 62. Support door panel; 63. Tilting mechanism; 631. Tilting motor; 632. Tilting gear; 633. Anti-reverse gear ring; 634. Half shaft; 635. Tilting seat; 636. Demolding shaft; 64. Slide plate. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0033] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0034] Examples, such as Figures 1-9 As shown, the present invention provides a mold conveying device for centrifugal casting, comprising multiple sections of ground rail 1, which are connected to a centrifugal casting machine 2. Multiple leveling carts 3 are mounted on the ground rail 1. The leveling carts 3 are used to carry a turnover device 4, a mold feeding device 5, and a mold unloading device 6. The number of turnover devices 4 is at least two. Each turnover device 4 clamps the mold and drives it to rotate around the X-axis. One of the turnover devices 4 operates on a ground rail distributed on the Y-axis and correspondingly connected to the mold feeding device 5. The other turnover device 4 is correspondingly connected to the mold unloading device 6, and both are located on ground rails along the same X-axis. The ground rails of the mold feeding device 5 are distributed on the X-axis parallel to the ground rails of the mold unloading device 6. The mold feeding device 5 drives the mold to rotate around the X-axis and Z-axis, and to translate along the Y-axis. The mold unloading device 6 clamps the mold and rotates around the Y-axis.

[0035] Specifically, the mold feeding device 5, which receives the mold taken from the furnace by the overhead crane, can move along the ground rail 1. The mold feeding device 5, through its multi-directional rotation, can connect with the turnover device 4. The turnover device 4, receiving the mold from the mold feeding device 5, can rotate 180 degrees and carry the mold to the centrifugal casting machine 2. Another turnover device 4 receives a mold with the formed product from the centrifugal casting machine 2 and rotates it 180 degrees. The mold unloading device 6, connected to the turnover device 4, can remove the mold along with the product, thus achieving the purpose of motorized mold unloading. This device is reasonably designed, has a simple structure, high efficiency in mold loading and unloading, is conducive to improving mold turnover efficiency, reducing workload, and improving casting efficiency.

[0036] To improve the accuracy of mold turnover in the turnover device 4, the turnover device 4 provided by the present invention includes a hydraulic expansion clamp 41, which is mounted on a hydraulic base 42. The hydraulic base 42 provides hydraulic oil and pump power. Bearing seats 43 are axially connected to both ends of the hydraulic base 42. A turnover drive motor 44, which is connected to the hydraulic base 42 for transmission, is provided on one side of the bearing seat 43. The turnover drive motor 44 drives the hydraulic base 42 to rotate to the side facing the clamping seat 59. The hydraulic base 42 drives the hydraulic expansion clamp 41 to clamp the mold. The mold feeding device 5 drives the clamping seat 59 to translate on the Y-axis, which can separate the mold from the clamping seat 59. The turnover device 4 drives the mold to rotate 180 degrees, which can then feed the mold into the centrifugal casting machine 2 for centrifugal casting.

[0037] Furthermore, the hydraulic expansion clamp 41 includes a hydraulic cylinder 411 connected to a hydraulic base 42. A mounting base 412 is provided on the top of the hydraulic cylinder 411. A spindle 413, connected to the movable end of the hydraulic cylinder, is located at the center of the mounting base 412. A tapered guide cylinder 414 is sleeved on the spindle 413. Multiple clamping claws 415, rotatably connected to the mounting base, are provided on the outer side of the guide cylinder 414. A spring 416 is provided between the end of the clamping claw 415 and the mounting base. When the hydraulic cylinder 411 drives the spindle 413 axially, the larger end of the guide cylinder 414 gradually approaches the head end of the clamping claws. The clamping claws 415 rotate around their rotational node with the mounting base, thus expanding the actual clamping radius of the clamping claws 415. The spring 416 provides supporting reaction force, thereby achieving the purpose of clamping the mold. Conversely, when the hydraulic cylinder 411 drives the spindle in the opposite direction, the expansion radius of the clamping claws 415 decreases, facilitating their separation from the mold.

[0038] To improve the motorized mold feeding performance of the mold feeding device 5, the mold feeding device 5 provided by the present invention includes a main spindle motor 51 and a main spindle 52. The power output end of the main spindle 52 faces upward and is provided with a transmission seat 53. A U-shaped connecting shaft 54 ​​is provided on the transmission seat 53 and is in a horizontal state. One side of the connecting shaft 54 ​​passes through the transmission seat 53 and is keyed to the transmission seat 53. A transmission thread pair 55 is provided at the center of the connecting shaft 54. A first motor 56 is provided at the end of the transmission thread pair 55. A second motor 57 is provided on the other side of the connecting shaft 54. The output shaft of the second motor 57 passes through the connecting shaft 54 ​​and is provided with a flange shaft 58 at its end. A clamping seat 59 is provided at the end of the flange shaft 58, which is distributed opposite to the transmission seat 53. The clamping seat 59 is used to cooperate with the mold. The connecting shaft 54 ​​adopts a U-shaped design, which can improve the space utilization of the device and maximize the proximity of the center of gravity of the clamping seat and the mold to the center of the device, which is beneficial to improving the working stability of the device. The clamping end of the clamping seat 59 faces upward to support the mold. After the mold is taken out of the furnace equipment, it is clamped by a crane or pliers and placed on the clamping seat 59. Since the ground rail 1 of the turnover device 4 and the ground rail 1 of this device are perpendicular to each other, the main shaft motor 51 drives the main shaft and the transmission seat 53 to rotate the mold around the Z-axis until the open end of the clamping seat 59 is perpendicular to the direction of the ground rail 1 of the turnover device 4. The second motor 57 drives the flange shaft 58 to rotate, so that the mold can be rotated from the face-up state to the face-to-turning state of the turnover device 4. Then, the hydraulic expansion clamp 41 clamps the mold, and the first motor 56 drives the transmission thread pair 55 to move the connecting shaft 54 ​​along the length direction of the transmission seat 53 until the clamping seat 59 leaves the end of the turnover device 4 and the clamping seat 59 is completely separated from the mold. In this way, the mold can be dynamically loaded onto the turnover device, which facilitates the subsequent loading of the mold onto the centrifugal casting machine 2. The mold feeding device 5 is reasonably designed, has a simple structure, high transfer efficiency, and helps ensure operational safety.

[0039] To improve the automatic clamping performance of the clamping seat 59 for the mold, the clamping seat 59 provided by the present invention includes a U-shaped side plate 591. The side plate 591 is provided with clamping strips 592 distributed along the U-shaped trajectory of its inner wall. The side plate 591 is provided with a U-shaped support plate 593 on its side facing the transmission seat 53. The support plate 593 supports the end face of the mold, the clamping strips 592 limit the other end face of the mold, and the inner wall of the side plate 591 clamps the outer side of the mold. The length design of the side plate 591 can effectively prevent the mold from automatically rolling out of its clamping opening.

[0040] To improve the linear drive performance of the first motor 56 on the connecting shaft 54, the transmission threaded pair 55 provided by the present invention includes a threaded hole 551 disposed at the center of the connecting shaft 54, a piston 552 disposed in the threaded hole 551 and rotatably engaged therewith, and a piston shaft 553 disposed between the piston 552 and the first motor 56. In this way, the first motor 56 drives the piston shaft 553 to rotate synchronously with the piston 552, and since the connecting shaft 54 ​​is keyed to the transmission seat 53, the rotational engagement of the piston 552 and the threaded hole 551 can be converted into linear movement of the connecting shaft 54, thereby achieving the purpose of linearly driving the connecting shaft 54, and enabling the mechanical separation of the mold from the device.

[0041] To improve the motorized demolding performance of the demolding device 6, the demolding device 6 provided by the present invention includes a support frame 61, and support door panels 62 are provided on both sides of the support frame 61. A flipping mechanism 63 for demolding is provided on the support door panels 62. The flipping mechanism 63 includes a pair of flipping motors 631. The output ends of the two flipping motors 631 are provided with a pair of meshing flipping gears 632 and a backstop gear ring 633. The backstop gear ring 633 is located inside the half shaft 634. A flipping seat 635 connected to the flipping gears 632 is provided at the end of the half shaft 634 away from the flipping gears 632. A demolding shaft 636 is provided at the end of the flipping seat 635 facing away from the half shaft 634. A sliding plate 64 is provided below the flipping mechanism 63. The sliding plate 64 is slidably engaged with the support frame 61. The leveling cart 3 can move linearly along the length of the track 1. The support frame 61 and support door panel 62 provide the mounting base for the flipping mechanism 63. The flipping motor 631 drives the flipping gear 632 to rotate. The flipping gear 632 meshes with the anti-reverse gear ring 633, and the half-shaft 634 rotates synchronously with the anti-reverse gear ring 633. The half-shaft 634 drives the flipping seat to rotate. In this way, the unloading shaft 636 picks up the mold from the turnover device 4 in the horizontal direction and flips it. The flipping direction can be directly downward 90 degrees or in the other direction 270 degrees until the flipping mechanism 63 unloads the mold and product onto the slide plate 64. The slide plate 64 can move the mold horizontally, so that the mold and product are in a relatively open environment, which facilitates the separation of the mold and product. This unloading device 6 achieves unloading by motorization, which reduces the working time and frequency of use of the crane. It is reasonably designed, simple in structure, has high unloading efficiency, and is conducive to reducing labor intensity and improving production efficiency.

[0042] To improve the practicality of the support frame 61, in addition to using square tubes as units to enhance its structural strength, the support frame 61 also includes two pairs of horizontally distributed horizontal tubes 611. Interval vertical tubes 612 are arranged between the horizontal tubes 611 on the same side. Four vertical tubes 613 are installed at the top of the horizontal tubes 611, and two pairs of U-shaped jacking tubes 614 are installed at the top of the vertical tubes 613. Each support panel 62 is positioned between the vertical tubes 613 on the same side. In this way, the horizontal tubes, interval vertical tubes, vertical tubes, and jacking tubes establish an effective support system and provide a foundation for the installation of the support panels.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A mold transfer apparatus for centrifugal casting, comprising a plurality of segments of a track which is connected to a centrifugal casting machine, and a plurality of land vehicles provided on the track, characterized in that, The platform cart is used to carry the turnover device, the mold feeding device, and the mold unloading device. There are at least two turnover devices. One of the turnover devices runs on a ground rail distributed on the Y-axis, which is connected to the mold feeding device and clamps the mold to rotate around the X-axis. The other turnover device is connected to the mold unloading device and both are located on the same ground rail along the X-axis. The ground rail of the mold feeding device is distributed on the X-axis parallel to the ground rail of the mold unloading device. The mold feeding device drives the mold to rotate around the X-axis and Z-axis and to translate around the Y-axis. The mold unloading device is used to clamp the mold and rotate around the Y-axis. The turnover device includes a hydraulic expansion clamp, which is mounted on a hydraulic base. Bearing seats are axially connected to both ends of the hydraulic base, and a turnover drive motor that is connected to the hydraulic base is mounted on one side of the bearing seats. The mold feeding device includes a main spindle motor and a main spindle. The power output end of the main spindle faces upward and is equipped with a transmission seat. A U-shaped connecting shaft is provided on the transmission seat and is in a horizontal state. One side of the connecting shaft passes through the transmission seat and is keyed to the transmission seat. A transmission thread pair is provided at the center of the connecting shaft. A first motor is provided at the end of the transmission thread pair. A second motor is provided on the other side of the connecting shaft. The output shaft of the second motor passes through the connecting shaft and is equipped with a flange shaft at its end. A clamping seat is provided at the end of the flange shaft, which is distributed opposite to the transmission seat. The clamping seat is used to cooperate with the mold. The clamping seat includes a U-shaped side plate. The inside of the side plate is provided with clamping strips distributed along the U-shaped trajectory of its inner wall. A U-shaped support plate is provided on the side of the side plate facing the transmission seat.

2. The centrifugal casting mold conveying device according to claim 1, characterized in that, The hydraulic expansion clamp includes a hydraulic cylinder connected to a hydraulic base. A mounting base is provided on the top of the hydraulic cylinder. A spindle connected to the movable end of the hydraulic cylinder is provided at the center of the mounting base. A tapered guide cylinder is sleeved on the spindle. Multiple clamping claws rotatably connected to the mounting base are provided on the outer side of the guide cylinder. A spring is provided between the end of the clamping claw and the mounting base.

3. The centrifugal casting mold conveying device according to claim 2, characterized in that, The transmission threaded pair includes a threaded hole located at the center of the connecting shaft, a piston that rotates and engages with the threaded hole, and a piston shaft is provided between the piston and the first motor.

4. The centrifugal casting mold conveying device according to claim 1, characterized in that, The demolding device includes a support frame, with support panels on both sides of the support frame. A flipping mechanism for demolding is provided on the support panels. The flipping mechanism includes a pair of flipping motors. Each output end of the two flipping motors is provided with a pair of meshing flipping gears and a backstop gear ring. The backstop gear ring is located inside the half-shaft. The end of the half-shaft away from the flipping gears is provided with a flipping seat that is keyed to it. The end of the flipping seat facing away from the half-shaft is provided with a demolding shaft. A sliding plate is provided below the flipping mechanism, and the sliding plate is slidably engaged with the support frame.

5. The centrifugal casting mold conveying device according to claim 4, characterized in that, The support frame includes two pairs of horizontal tubes distributed vertically, with spaced vertical tubes between the horizontal tubes on the same side. Four vertical tubes are provided on the top of the horizontal tubes, and two pairs of top tubes distributed in a U-shape are provided on the top of the vertical tubes. Each support door panel is located between the vertical tubes on the same side.

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