Cantilever type centrifugal casting pipe die clamping tool

Abstract

The utility model is suitable for the technical field of centrifugal casting, and provides a cantilever type centrifugal casting pipe die clamping tool which comprises a flange ring fixedly installed at a pipe die port, a matched outer end cover is placed on an inner ring of the flange ring, a plurality of gravity hammers are symmetrically and rotationally connected to the periphery of the flange ring, and clamping jaws are arranged at the front ends of rotating shaft positions of the gravity hammers. The rear end of the gravity hammer is a gravity part; and when the pipe die rotates, the clamping jaw of the gravity hammer tightly presses the edge of the outer end cover. The tool is provided with the flange ring with the gravity hammer, the outer end cover is placed in the inner ring center of the flange ring, the centrifugal machine drives the pipe die to rotate at a high speed, the gravity hammer rotates to press the outer end cover, and after casting forming shutdown, the gravity hammer automatically recovers to the initial state, the outer end cover can be directly taken down, and in this way, the outer end cover does not need to be fastened through a pin. The outer end cover is simple and quick to assemble and disassemble and stable and safe to operate; and the centrifugal machine protection cover does not need to be disassembled, so that the assembling and disassembling workload is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal casting, in particular to a cantilever centrifugal casting pipe mold clamping tool. Background Art

[0002] Horizontal centrifugal casting, a casting process with a specific industry term, is primarily used to produce sleeves and tubes with uniform wall thickness. The basic principle of horizontal centrifugal casting is to pour liquid metal into a mold that rotates about a horizontal axis. Centrifugal force causes the molten metal to fill the mold and form the casting. The mold is tubular and can be referred to as a tube mold.

[0003] During production, the outer ends of the pipe mold are typically secured with pins to the outer end caps. When the mold is opened, the pins are first removed, the outer end caps are removed, and the centrifugal casting is removed. The inner wall of the pipe mold is then spray-coated, and the outer end caps are reinstalled before pouring a new centrifugal casting.

[0004] In addition, due to the small size of the cantilever centrifuge tube mold and the need to be installed in the centrifuge protective cover, the current operation method requires the outer end cover to be fixed with pins. Each time, the protective cover needs to be removed, and then the outer end cover needs to be fastened with pins before the protective cover is installed. The process is cumbersome. Utility Model Content

[0005] In view of the above problems, the purpose of the present invention is to provide a cantilever centrifugal casting pipe mold clamping tooling, aiming to solve the above technical problems.

[0006] The utility model adopts the following technical solutions:

[0007] The cantilever centrifugal casting pipe mold clamping tooling includes a flange ring fixedly installed at the pipe mold port, a matching outer end cover is placed on the inner ring of the flange ring, and multiple gravity hammers are symmetrically connected to the outer circumference of the flange ring for rotation. The front end of the gravity hammer's rotating shaft is a claw, and the rear end is a gravity part. When the pipe mold rotates, the claw of the gravity hammer presses the edge of the outer end cover.

[0008] Furthermore, the outer side of the outer end cover is provided with a circle of stepped openings, the clamping claws of the gravity hammer press the stepped openings of the outer end cover, and the inner end face of the outer end cover contacts the end face of the pipe mold.

[0009] Furthermore, the gravity hammer is Z-shaped as a whole, and the center of gravity of the gravity hammer is close to the rear end of the gravity hammer.

[0010] Furthermore, a plurality of hinge seats are symmetrically formed on the flange ring, and the gravity hammer is rotatably mounted on the corresponding hinge seats.

[0011] Furthermore, the inner side of the flange ring is a mounting sleeve, and the port of the pipe mold is embedded in the mounting sleeve. The flange ring is provided with a fixing hole, and bolts are passed through the fixing hole to be locked to the end face of the pipe mold.

[0012] The beneficial effects of the utility model are as follows: the tooling of the utility model is designed with a flange ring for fixed installation on the port of the pipe mold, and a plurality of gravity hammers are provided on the flange ring. During operation, the outer end cover is directly placed on the inner ring center of the flange ring, the centrifuge drives the pipe mold to rotate at high speed, and the gravity hammer rotates to press the outer end cover tightly. After the casting is stopped, the gravity hammer automatically returns to its initial state, and the outer end cover can be directly removed. This method does not require the use of pins to fasten the outer end cover, and the installation and removal of the outer end cover are simple and fast, thereby realizing safe and simple installation and fastening of the outer end cover, and safe and stable operation during the production process; and the utility model does not require the removal of the centrifuge protective cover, thereby reducing the workload of installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram of a cantilever centrifugal casting pipe mold clamping fixture provided by an embodiment of the present utility model;

[0014] Figure 2 This is a partial cross-section of the cantilever centrifugal casting pipe mold clamping fixture. Figure 1 ;

[0015] Figure 3 This is a partial cross-section of the cantilever centrifugal casting pipe mold clamping fixture. Figure 2 . DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0018] like Figure 1-3 As shown, the cantilever centrifugal casting pipe mold clamping fixture provided in this embodiment includes a flange ring 2 fixedly installed at the port of the pipe mold 1, and a matching outer end cover 3 is placed on the inner ring of the flange ring 2. The outer periphery of the flange ring 2 is symmetrically rotated with multiple gravity hammers 4. The front end of the gravity hammer 4 at the rotating shaft position is a claw 41, and the rear end is a gravity part 42. When the pipe mold rotates, the claw of the gravity hammer 4 presses the edge of the outer end cover 3.

[0019] In this structure, the outer end cap 3 is essentially the same as the existing structure, with a pouring hole 31 at its center and a countersunk hole 32 on its inner side. The diameter of the countersunk hole 32 is smaller than the inner diameter of the pipe mold 1. The pipe mold is installed horizontally. During operation, the flange ring 2 is first fixed to the end of the pipe mold. In the figure, the inner side of the flange ring 2 is a mounting sleeve 21, into which the end of the pipe mold 1 is inserted. The flange ring 2 has a fixing hole 22, which is bolted to the end face of the pipe mold 1. In this installation method, the flange ring 2 is also removable.

[0020] In addition, the flange ring 2 shown in the figure is symmetrically formed with multiple hinged seats 23, and the gravity hammers 4 are rotatably mounted on corresponding hinged seats 23. The specific number of gravity hammers is not limited in this embodiment; they can be arranged symmetrically to ensure smooth rotation. In the figure, there are four hinged seats 23, arranged in a square. Alternatively, two or four gravity hammers can be provided.

[0021] As a specific structure, the gravity hammer 4 is Z-shaped as a whole, with the center of gravity of the gravity hammer near the rear end of the gravity hammer 4. The pipe mold is driven to rotate by a centrifuge. The centrifuge has a high speed and a fast startup speed. At the moment of rotation, the gravity hammer can rotate and open according to the centrifugal effect, and the gravity hammer claws press the end cover tightly to tighten the outer end cover. In addition, the diameter of the outer end cover matches the diameter of the inner ring of the flange ring, and the gap is small. After the outer end cover is placed, the position of the outer end cover is stable, and there is a certain amount of friction between the two. Therefore, when the pipe mold is rotated and started, the outer pipe will not slip, and the operation is stable and safe. In addition, when the pipe mold is shut down, after the outer end cover is placed, the gravity hammer located below will also press the outer end cover under the action of gravity, so that the claws can also be guaranteed to prevent the outer end cover from slipping at the moment of starting the centrifuge.

[0022] In order to ensure the pressing effect, in this structure, the outer side of the outer end cover 3 is provided with a circle of stepped openings 33, the claws of the gravity hammer press the stepped openings 33 of the outer end cover, and the inner end face of the outer end cover 3 contacts the end face of the pipe mold.

[0023] During the stable and high-speed rotation of the tube mold, molten metal is added from the pouring hole in the center of the outer end cover. Under the action of centrifugal force, the molten metal is evenly distributed on the inner wall of the tube mold. After cooling, a tubular casting is formed. The outer end cover is then removed and the casting can be taken out.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cantilever centrifugal casting pipe mold clamping tool, characterized in that: It includes a flange ring fixedly installed on the port of the pipe mold, with a matching outer end cover placed on the inner ring of the flange ring. The outer circumference of the flange ring is symmetrically rotated and connected to multiple gravity hammers. The front end of the gravity hammer's rotating shaft is a claw, and the rear end is a gravity part. When the pipe mold rotates, the claw of the gravity hammer presses the edge of the outer end cover.

2. The cantilever centrifugal casting pipe mold clamping fixture as claimed in claim 1, characterized in that: The outer side of the outer end cover is provided with a circle of stepped openings, the clamping claws of the gravity hammer press the stepped openings of the outer end cover, and the inner end surface of the outer end cover contacts the end surface of the pipe mold.

3. The cantilever centrifugal casting pipe mold clamping fixture as claimed in claim 2, characterized in that: The gravity hammer is Z-shaped as a whole, and the center of gravity of the gravity hammer is close to the rear end of the gravity hammer.

4. The cantilever centrifugal casting pipe mold clamping fixture as claimed in claim 3, characterized in that: A plurality of hinge seats are symmetrically formed on the flange ring, and the gravity hammer is rotatably mounted on the corresponding hinge seats.

5. The cantilever centrifugal casting pipe mold clamping fixture as claimed in claim 4, characterized in that: The inner side of the flange ring is a mounting sleeve, and the port of the pipe mold is embedded in the mounting sleeve. The flange ring is provided with a fixing hole, and a bolt is passed through the fixing hole to be locked to the end face of the pipe mold.

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