Demolding mechanism and demoulding method for horizontal cantilever centrifugal casting machine

Abstract

The present invention belongs to the technical field of mechanical engineering design, and specifically relates to a demoulding mechanism for a horizontal cantilever centrifugal casting machine, including a flip chuck and a traction mechanism connected to the flip chuck, a plurality of clamping hydraulic cylinders are radially arranged on the flip chuck, the plurality of clamping hydraulic cylinders are arranged in a ring, and the extension directions of the telescopic ends of the plurality of clamping hydraulic cylinders are opposite to each other, and an ejection hydraulic cylinder is axially arranged on the flip chuck, and the extension direction of the telescopic end of the ejection hydraulic cylinder is opposite to the traction mechanism. The demoulding mechanism of the present invention utilizes the incomplete synchronization of the clamping hydraulic cylinders, and the clamping claws penetrate into the mold, which can be automatically centered, that is, the center of the moving clamping claws and the center of the mold can be not coaxial, so that the automatic centering can be achieved, and the operation is convenient, and the device and the mold do not generate eccentric torque, which causes damage to the operating device. It can reduce the workload and improve safety. Especially for centrifugal castings with large diameters and heavy weights, the advantages of the demoulding mechanism of the present invention are particularly obvious.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical engineering design, and in particular relates to a demoulding mechanism and a demoulding method for a horizontal cantilever centrifugal casting machine. Background Art

[0002] At present, in the centrifugal casting industry, when a centrifugal casting is completed, the casting needs to be manually removed from the mold using auxiliary tools before the next round of casting can be prepared. For castings with larger diameters, thicker walls, and wider widths, the manual demoulding process is very inconvenient. It not only consumes a lot of labor and takes a long time to disassemble, but also the temperature of the casting is much higher than room temperature, which can easily burn the operator during the demoulding process, posing a major safety hazard. Summary of the invention

[0003] In view of the above defects in the prior art, the purpose of the present invention is to provide a safe and efficient demoulding mechanism, which can not only greatly reduce the workload but also improve the safety during the working process.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a demolding mechanism for a horizontal cantilever centrifugal casting machine, comprising a flip chuck and a traction mechanism connected to the flip chuck, a plurality of clamping hydraulic cylinders are radially arranged on the flip chuck, the plurality of clamping hydraulic cylinders are arranged in a ring, and the extension directions of the telescopic ends of the plurality of clamping hydraulic cylinders are opposite to each other, and an ejection hydraulic cylinder is axially arranged on the flip chuck, and the extension direction of the telescopic end of the ejection hydraulic cylinder is opposite to the traction mechanism.

[0005] Furthermore, the telescopic end of each clamping hydraulic cylinder is respectively connected to a clamping claw, and the clamping claw is detachably connected to the clamping hydraulic cylinder.

[0006] Furthermore, the end of the clamping jaw is configured to be sawtooth-shaped.

[0007] Furthermore, a guide column is provided on both sides of each clamping hydraulic cylinder, the direction of the guide column is the same as the extension direction of the telescopic end of the clamping hydraulic cylinder, and the clamping claw is connected to the guide column and moves along the direction of the guide column.

[0008] Furthermore, a hydraulic cylinder fixing plate is arranged parallel to the top of the flip chuck, the clamping hydraulic cylinder and the ejection hydraulic cylinder are both fixed on the hydraulic cylinder fixing plate, the hydraulic cylinder fixing plate is circular, and the diameter of the hydraulic cylinder fixing plate is smaller than the outer diameter formed by a plurality of clamping hydraulic cylinders arranged in a ring.

[0009] Furthermore, there are three clamping hydraulic cylinders, which are evenly distributed along a ring at intervals of 120°, and there is one ejecting hydraulic cylinder, which is arranged at the center of the ring surrounded by the three clamping hydraulic cylinders.

[0010] Furthermore, the traction mechanism drives the flip chuck to flip by 0-90 degrees.

[0011] Furthermore, the traction mechanism includes a traction rod and a flip hydraulic cylinder for connecting a forklift fixed plate, the forklift fixed plate is connected to the forklift, one end of the traction rod is fixedly connected to the forklift fixed plate, the other end of the traction rod is hinged to the flip chuck, the fixed end of the flip hydraulic cylinder is hinged to the forklift fixed plate, the telescopic end of the flip hydraulic cylinder is hinged to the flip chuck, and the telescopic movement of the telescopic end of the flip hydraulic cylinder drives the flip chuck to flip 0-90° with the hinge point of the traction rod as the axis.

[0012] The demoulding method for a horizontal cantilever centrifugal casting machine is to tighten the inner diameter of the casting by a plurality of clamping hydraulic cylinders arranged in a ring along the upper edge of a flip chuck. When the hydraulic cylinder reaches a predetermined pressure, the clamping hydraulic cylinder maintains the pressure, and the flip chuck is retreated by a forklift to complete demoulding.

[0013] Furthermore, an ejection hydraulic cylinder is axially arranged at the center of the flip chuck. When the forklift moves backward, the ejection hydraulic cylinder is started, the telescopic rod is extended, and the reaction force is used to demold the casting in the horizontal direction. The forklift drives the flip chuck to complete the demolding and flipping operations through the flip hydraulic cylinder and the traction rod. The flip hydraulic cylinder and the flip chuck are connected by a movable hinge, and the traction rod and the flip chuck are connected by a fixed hinge. After the demolding is completed, as the flip hydraulic cylinder is extended and retracted, the flip chuck is flipped 0-90° around the fixed hinge as the axis under the action of the force at the movable hinge, and is placed vertically at a predetermined position.

[0014] Furthermore, there are three clamping hydraulic cylinders, which are inserted deep into the mold. When working, the three clamping hydraulic cylinders are started simultaneously to achieve automatic centering.

[0015] The beneficial effects of the present invention are as follows: the demoulding mechanism of the present invention utilizes the incomplete synchronization of the clamping hydraulic cylinder, and the clamping claws penetrate deeply into the mold, which can be automatically centered, that is, the center of the moving clamping claws and the center of the mold can be not coaxial, which can automatically center the mold, and the operation is convenient. The device and the mold do not generate eccentric torque to cause damage to the operating device. It can not only greatly reduce the labor, but also improve the safety during the work process. Especially for centrifugal castings with large diameters and heavy weights, it is very difficult to manually disassemble the castings. The advantages of the demoulding mechanism of the present invention are particularly obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the draft mechanism;

[0017] Figure 2 It is a schematic diagram of the flip hinge of the draft mechanism;

[0018] In the figure: 1. flip chuck, 2. clamping hydraulic cylinder, 3. ejection hydraulic cylinder, 4. clamping claw, 5. guide column, 6. hydraulic cylinder fixing plate, 7. forklift fixing plate, 8. towing rod, 9. flip hydraulic cylinder, 10. fixed hinge point, 11. mobile hinge point. DETAILED DESCRIPTION

[0019] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See attached Figure 1-2 , a demolding mechanism for a horizontal cantilever centrifugal casting machine, comprising a flip chuck 1 and a traction mechanism connected to the flip chuck, wherein three clamping hydraulic cylinders 2 are radially arranged on the flip chuck 1, and the three clamping hydraulic cylinders are evenly distributed along the ring at intervals of 120°, and the extension directions of the telescopic ends of the three clamping hydraulic cylinders are opposite to each other, and an ejection hydraulic cylinder 3 is axially arranged on the flip chuck, and the ejection hydraulic cylinder 3 is a hydraulic cylinder for ejecting the mold to assist in the smooth completion of the demolding action, and the ejection hydraulic cylinder 3 is arranged at the center position of the ring surrounded by the three clamping hydraulic cylinders, and the extension direction of the telescopic end of the ejection hydraulic cylinder is opposite to the traction mechanism.

[0021] Furthermore, each telescopic end of the clamping hydraulic cylinder is connected to a clamping jaw 4, which is detachably connected to the clamping hydraulic cylinder 2. The clamping jaw 4 is internally tightened by the hydraulic cylinder, and the end of the clamping jaw 4 is serrated, which has a large friction force. A guide column 5 is provided on both sides of each clamping hydraulic cylinder, and the direction of the guide column 5 is the same as the extension direction of the telescopic end of the clamping hydraulic cylinder. The clamping jaw 4 is connected to the guide column 5 and moves along the direction of the guide column 5 to prevent the piston from tilting and damaging the hydraulic cylinder when the force is uneven.

[0022] Furthermore, a hydraulic cylinder fixing plate 6 is arranged parallel to the top of the flip chuck 1, and the clamping hydraulic cylinder 2 and the ejection hydraulic cylinder 3 are both fixed on the hydraulic cylinder fixing plate 6. The hydraulic cylinder fixing plate is used to fix three radial clamping hydraulic cylinders and one axial ejection hydraulic cylinder, and is connected to the hydraulic pipeline. The hydraulic cylinder fixing plate 6 is circular, and the diameter of the hydraulic cylinder fixing plate 6 is smaller than the outer diameter surrounded by the plurality of clamping hydraulic cylinders 2 arranged in a ring, so as to ensure smooth access to the inner diameter of the casting.

[0023] Furthermore, the traction mechanism drives the flip chuck 1 to flip 0-90 degrees. The traction mechanism includes a traction rod 8 and a flip hydraulic cylinder 9 for connecting the forklift fixed plate 7, and the flip hydraulic cylinder 9 realizes the flipping of the demolding mechanism. The forklift fixed plate 7 is connected to the forklift, one end of the traction rod 8 is fixedly connected to the forklift fixed plate 7, and the other end of the traction rod 8 is hinged to the flip chuck 1, the fixed end of the flip hydraulic cylinder 9 is hinged to the forklift fixed plate 7, and the telescopic end of the flip hydraulic cylinder 9 is hinged to the flip chuck 1. The telescopic movement of the telescopic end of the flip hydraulic cylinder drives the flip chuck to flip 0-90 degrees with the hinge point of the traction rod as the axis.

[0024] The angle of the front demolding part is adjusted by the telescopic movement of the flip hydraulic cylinder and the rotation of the hinge. This mechanism can achieve a 90-degree flip so that the mold can be placed stably in the desired position after it is removed. Three clamping hydraulic cylinders 2 are evenly arranged on the front hydraulic cylinder fixing plate 6. A clamping claw with a large top friction force is installed on the top of the piston of each clamping hydraulic cylinder 2. The clamping claw can be replaced to meet the needs of disassembling castings of different diameters. When not working, the clamping hydraulic cylinder 2 is in a retracted state. When working, press the hydraulic button to make the three clamping hydraulic cylinders 2 extend outward at the same time to tighten the inner diameter of the casting. When the clamping hydraulic cylinder 2 reaches a certain pressure, the pressure cylinder maintains the pressure. Then the ejection hydraulic cylinder 3 in the middle of the hydraulic cylinder fixing plate 6 extends outward, and the forklift retreats at the same time to complete the demolding of the casting. Then the front hydraulic cylinder fixing plate 6 and the mold are flipped 90 degrees by the flip hydraulic cylinder 9, the casting is laid flat, and then placed in the designated position.

[0025] Three clamping hydraulic cylinders are used, and the three clamping hydraulic cylinders are not completely synchronized. The clamping jaws go deep into the mold and can be automatically centered, that is, the center of the moving clamping jaws and the center of the mold can be not coaxial, so they can be automatically centered, which is easy to operate, and the moving vehicle and the mold will not generate eccentric torque to cause damage to the operating device.

[0026] Furthermore, an ejection hydraulic cylinder is axially arranged at the center of the flip chuck 1. When the forklift moves backward, the ejection hydraulic cylinder 3 is started, the telescopic rod is extended, and the reaction force is used to demold the casting in the horizontal direction; the forklift drives the flip chuck 1 to complete the demolding and flipping operations through the flip hydraulic cylinder 9 and the traction rod 8. The flip hydraulic cylinder 9 and the flip chuck 1 are connected by a movable hinge 11, and the traction rod 8 and the flip chuck 1 are connected by a fixed hinge 10. After the demolding is completed, as the flip hydraulic cylinder is extended and retracted, the flip chuck 1 is flipped 0-90° around the fixed hinge 10 under the action of the force at the movable hinge 11, and is placed vertically at a predetermined position.

[0027] Furthermore, there are three clamping hydraulic cylinders 2, which are inserted deep into the mold. When working, the three clamping hydraulic cylinders are started simultaneously to achieve automatic centering.

[0028] This mechanism is suitable for horizontal cantilever centrifugal casting machines. When the centrifuge is finished working and cooled to a certain temperature, when the casting needs to be demolded, the forklift is moved to the front of the mold, the clamping hydraulic cylinder 2 is confirmed to be in the retracted state, the height of the demolding mechanism is adjusted, and the demolding mechanism is slowly moved to the center of the casting by the forklift, and then the switch of the tensioning hydraulic cylinder is pressed to make the hydraulic cylinder expand and contract to the set pressure. The pressure can be set in advance according to the weight of the casting to ensure that the three clamps tighten the casting at the same time, and then the ejection hydraulic cylinder 3 is used to eject the casting from the mold when the piston is extended outward, and the forklift moves backward to complete the demolding action. When the casting is completely pulled out of the mold, the casting is moved to the specified position, and then the flip hydraulic cylinder button is activated to extend the piston forward, forcing the hydraulic cylinder 6 fixed plate to flip forward to be parallel to the ground, and then the forklift is adjusted to make the casting fall gently to the ground, and then the hydraulic cylinder is released to complete the demolding and operation of the casting.

[0029] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. Used for the demoulding mechanism of horizontal cantilever centrifugal casting machine, Features: It comprises a flip chuck and a traction mechanism connected to the flip chuck, wherein a plurality of clamping hydraulic cylinders are radially arranged on the flip chuck, the plurality of clamping hydraulic cylinders are arranged in a ring, and the extension directions of the telescopic ends of the plurality of clamping hydraulic cylinders are opposite to each other, and an ejection hydraulic cylinder is axially arranged on the flip chuck, and the extension direction of the telescopic end of the ejection hydraulic cylinder is opposite to the traction mechanism; a clamping claw is respectively connected to the telescopic end of each clamping hydraulic cylinder, and the clamping claw is detachably connected to the clamping hydraulic cylinder; the traction mechanism drives the flip chuck to flip by 0-90°; the traction mechanism comprises a traction rod and a flip hydraulic cylinder for connecting a forklift fixed plate, the forklift fixed plate is connected to the forklift, one end of the traction rod is fixedly connected to the forklift fixed plate, and the other end of the traction rod is hinged to the flip chuck, the fixed end of the flip hydraulic cylinder is hinged to the forklift fixed plate, the telescopic end of the flip hydraulic cylinder is hinged to the flip chuck, and the telescopic movement of the telescopic end of the flip hydraulic cylinder drives the flip chuck to flip by 0-90° with the hinge point of the traction rod as the axis; The inner diameter of the casting is tightened by a plurality of clamping hydraulic cylinders arranged in a ring along the upper edge of the flip chuck. When the clamping hydraulic cylinder reaches a predetermined pressure, the clamping hydraulic cylinder maintains the pressure, and the flip chuck is demoulded by the forklift moving backward. An ejecting hydraulic cylinder is arranged axially at the center of the flip chuck. When the forklift moves backward, the ejecting hydraulic cylinder is started, and the telescopic rod is extended, and the casting is demoulded horizontally by the reaction force. The forklift drives the flip chuck to complete the demoulding and flipping operations through the flip hydraulic cylinder and the traction rod. The flip hydraulic cylinder and the flip chuck are connected by a mobile hinge point, and the traction rod and the flip chuck are connected by a fixed hinge point. After the demoulding is completed, as the flip hydraulic cylinder is extended and retracted, the flip chuck is flipped 0-90° around the fixed hinge point under the action of the force at the mobile hinge point, and is placed vertically at a predetermined position.

2. The die-pulling mechanism for a horizontal cantilever centrifugal casting machine according to claim 1, Features: The end of the clamping jaw is configured in a sawtooth shape.

3. The die-pulling mechanism for a horizontal cantilever centrifugal casting machine according to claim 2, Features: A guide column is respectively arranged on both sides of each clamping hydraulic cylinder. The direction of the guide column is the same as the extension direction of the telescopic end of the clamping hydraulic cylinder. The clamping claw is connected to the guide column and moves along the direction of the guide column.

4. The die-pulling mechanism for a horizontal cantilever centrifugal casting machine according to claim 1, Features: A hydraulic cylinder fixing plate is arranged above the flip chuck, and the clamping hydraulic cylinder and the ejecting hydraulic cylinder are both fixed on the hydraulic cylinder fixing plate. The hydraulic cylinder fixing plate is circular, and the diameter of the hydraulic cylinder fixing plate is smaller than the outer diameter formed by a plurality of clamping hydraulic cylinders arranged in a ring.

5. The die-pulling mechanism for a horizontal cantilever centrifugal casting machine according to claim 1, Features: There are three clamping hydraulic cylinders, which are evenly distributed along the ring at intervals of 120°. There is one ejecting hydraulic cylinder, which is arranged at the center of the ring surrounded by the three clamping hydraulic cylinders.

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