Gravity casting device for bearing alloy of high-pressure and low-pressure sealing body

Abstract

The utility model discloses a gravity casting device for bearing alloy of a high-pressure and low-pressure sealing body. The gravity casting device comprises a bottom plate, a casting sleeve, a tool base, a cooling water pipe and other parts. According to the utility model, the casting efficiency can be improved, the casting cost can be reduced, and the casting quality can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of high and low pressure sealing body bearing alloy casting, and more specifically to a gravity casting device for high and low pressure sealing body outer round bearing alloy. Background Art

[0002] Bearing alloys are usually cast in the inner hole and end face of the substrate to form bimetallic or multimetallic bearings. The alloy casting can be done by centrifugal casting and gravity casting, which have been very mature after decades of development. The bearing alloy layer of the special high and low pressure seal is the opposite. The alloy layer is set on the outer circle of the substrate, so the centrifugal casting process cannot be used. The gravity casting process cannot control the crystallization direction of the bearing alloy during the casting process, so the casting quality is poor, the bonding force after casting is low, and the alloy itself will have casting defects such as looseness, inclusions, and pores, which cannot meet the product quality requirements and need to be repaired later. Utility Model Content

[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a gravity casting device for high and low pressure sealed external cylindrical bearing alloys to solve the technical problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gravity casting device for high and low pressure sealed bearing alloys, comprising a tooling base, the tooling base is provided with a drain outlet, the upper end of the tooling base is provided with a bottom plate, the bottom plate is provided with a locking bolt, the casting sleeve is fixed to the tooling base by the locking bolt, and the bearing body is installed on the bottom plate inside the casting sleeve by the locking bolt; a cooling water pipe is inserted into the interior of the bearing body.

[0005] Furthermore, the tooling base is in a truncated cone shape, and the circular drain outlet is coaxially arranged with the tooling base.

[0006] Furthermore, a drainage channel is provided at the lower end of the tooling base corresponding to the drainage port.

[0007] Furthermore, the annular bottom plate is coaxially arranged with the tooling base, the outer end of the bottom plate is overlapped on the tooling base, and the inner end of the bottom plate is at the upper end of the drain outlet.

[0008] Furthermore, the bottom plate at the outer end fixes the casting sleeve on the tooling base through the engaging bolts, and the bottom plate at the inner end mounts the bearing body on the upper end of the bottom plate through the inverted engaging bolts.

[0009] Furthermore, a fiberboard is provided between the bearing body and the bottom plate.

[0010] Furthermore, the casting sleeve is an inverted truncated cone-shaped hollow structure coaxially arranged with the tooling base.

[0011] Furthermore, a cover plate is provided at the upper opening of the casting sleeve, and an avoidance hole is provided on the cover plate corresponding to the cooling water pipe, and the cooling water pipe extends into the interior of the bearing body through the avoidance hole.

[0012] Furthermore, the cooling water pipe passes through the avoidance hole and extends into the bottom of the bearing body, the end of the cooling water pipe is sealed, and water outlet holes are evenly arranged on the cooling water pipe under the cover plate; a cooling water control valve is provided at the water inlet end of the cooling water pipe.

[0013] Furthermore, the size of the cover plate matches the size of the outer diameter of the bearing body, and a clamping platform matching the inner diameter of the bearing body is provided at the bottom end of the cover plate.

[0014] Compared with the prior art, the high-low pressure sealed external cylindrical bearing alloy gravity casting device of the utility model is convenient for casting, safe and reliable for workpiece clamping, greatly improves the workpiece casting efficiency, and makes the casting process safer and the casting quality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a casting device according to an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the use status of the casting device according to an embodiment of the utility model.

[0017] Figure numerals: 1. tooling base, 2. bottom plate, 3. casting sleeve, 4. cover plate, 5. cooling water pipe, 6. closing bolt, 7. cooling water control valve, 8. drain port, 9. bearing body, 10. drainage channel, 11. clamping table. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the embodiments are not intended to limit the present invention. All similar structures and similar variations of the present invention should be included in the protection scope of the present invention.

[0019] like Figure 1 and Figure 2 As shown, a gravity casting device for high and low pressure sealed external cylindrical bearing alloys includes a tooling base 1, a base plate 2, a casting sleeve 3, a cover plate 4, a cooling water pipe 5, a closing bolt 6, a cooling water control valve 7, a drain port 8, a bearing body 9, a drainage channel 10, and a clamping table 11.

[0020] Specifically, the tooling base 1 is truncated, and a circular drain port 8 is provided in the center of the tooling base 1. The drain port 8 is coaxially arranged with the tooling base 1. A drainage channel 10 is provided at the lower end of the tooling base 1 corresponding to the drain port 8. A certain space is left between the tooling base 1 and the ground to facilitate the cooling water to flow out from the bottom during cooling. A circular ring-shaped bottom plate 2 is coaxially provided at the upper end of the tooling base 1. The outer end of the bottom plate 2 is overlapped on the tooling base 1, and the inner end of the bottom plate 2 is at the upper end of the drain port 8. The bottom plate 2 at the outer end fixes the casting sleeve 3 to the tooling base 1 through the closing bolt 6, and the bottom plate 2 at the inner end installs the bearing body 9 on the upper end of the bottom plate 2 through the inverted closing bolt 6. A fiberboard is provided between the bearing body 9 and the bottom plate 2, and the design of the closing bolt 6 facilitates disassembly after casting. The casting sleeve 3 is a hollow structure in the shape of an inverted truncated cone and is coaxially arranged with the tooling base 1. The casting sleeve 3 is provided with a certain taper to facilitate demoulding of the device and the bearing alloy after casting, and to form a certain pressure when the tin-based alloy is cast to improve the casting quality. A cover plate 4 is provided at the upper opening of the casting sleeve 3. The cover plate 4 is provided with an avoidance hole corresponding to the cooling water pipe 5. The cooling water pipe 5 passes through the avoidance hole and extends into the interior of the bearing body 9. The cooling water discharged from the cooling water pipe 5 is used to cool the inner wall of the bearing body 9. Alternatively, the cooling water pipe 5 extends into the bottom of the bearing body 9 through the avoidance hole, the end of the cooling water pipe 5 is sealed, and the cooling water pipe 5 under the cover plate 4 is evenly arranged with water outlet holes; the cooling water is evenly sprayed outwards by the water outlet holes on the cooling water pipe wall to cool the inner wall of the bearing body, so that the cooling is more uniform and sufficient, and the bearing alloy is controlled to gradually solidify from the inside to the outside, that is, the surface of the bearing body solidifies first, and the inner wall of the casting sleeve solidifies last, and the bonding strength between the outer surface of the bearing body and the casting alloy is improved through directional cooling. The water inlet end of the cooling water pipe 5 is provided with a cooling water control valve 7, which can control the water flow size during the casting process to make it cool more fully. The size of the cover plate 4 matches the size of the outer diameter of the bearing body 9, and the bottom end of the cover plate 4 is provided with a clamping table 11 that matches the inner diameter of the bearing body 9.

[0021] Working principle: When in use, before casting, place the tooling base 1 in an open space in advance, close the bottom plate 2 with the bearing body through the closing bolts 6, place the bearing body on the tooling base 1, fix the bottom plate 2 with the bearing body installed on the tooling base 1 through the closing bolts, and place the cooling water pipe 5 connected with the cover plate 4 on the upper end of the bearing body. After completing the above steps, pour the alloy into the cavity between the casting sleeve 3 and the bearing body. After pouring a certain amount, open the cooling water control valve 7, and the cooling water will spray out from the water outlet to cool the inner wall of the bearing body. After cooling, remove the closing bolts on the bottom plate 2 and the casting sleeve 3, and demould the casting sleeve 3.

[0022] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A gravity casting device for high and low pressure seal bearing alloys, comprising a tooling base (1), characterized in that: The tooling base (1) is provided with a drain port (8); the upper end of the tooling base (1) is provided with a bottom plate (2); the bottom plate (2) is provided with a locking bolt (6); the casting sleeve (3) is fixed to the tooling base (1) by the locking bolt (6); the bearing body (9) is installed on the bottom plate (2) inside the casting sleeve (3) by the locking bolt (6); and the cooling water pipe (5) is inserted into the interior of the bearing body (9).

2. A gravity casting device for high and low pressure seal bearing alloy according to claim 1, characterized in that: The tooling base (1) is in the shape of a truncated cone, and the circular drain outlet (8) is coaxially arranged with the tooling base (1).

3. A gravity casting device for high and low pressure seal bearing alloy according to claim 2, characterized in that: A drainage channel (10) is provided at the lower end of the tooling base (1) corresponding to the drainage port (8).

4. A gravity casting device for high and low pressure seal bearing alloy according to claim 3, characterized in that: The annular bottom plate (2) is coaxially arranged with the tooling base (1), the outer end of the bottom plate (2) is overlapped on the tooling base (1), and the inner end of the bottom plate (2) is at the upper end of the drain outlet (8).

5. A gravity casting device for high and low pressure seal bearing alloy according to claim 4, characterized in that: The base plate (2) at the outer end fixes the casting sleeve (3) on the tooling base (1) through the engaging bolts (6), and the base plate (2) at the inner end installs the bearing body (9) on the upper end of the base plate (2) through the inverted engaging bolts (6).

6. A gravity casting device for high and low pressure seal bearing alloy according to claim 5, characterized in that: A fiberboard is provided between the bearing body (9) and the bottom plate (2).

7. A gravity casting device for high and low pressure seal bearing alloy according to claim 6, characterized in that: The casting sleeve (3) is a hollow structure in the shape of an inverted truncated cone and is coaxially arranged with the tooling base (1).

8. The gravity casting device for high and low pressure seal bearing alloy according to claim 7, characterized in that: A cover plate (4) is provided at the upper opening of the casting sleeve (3), and a relief hole is provided on the cover plate (4) corresponding to the cooling water pipe (5), and the cooling water pipe (5) passes through the relief hole and extends into the interior of the bearing body (9).

9. A gravity casting device for high and low pressure seal bearing alloy according to claim 8, characterized in that: The cooling water pipe (5) passes through the avoidance hole and extends into the bottom of the bearing body (9); the end of the cooling water pipe (5) is sealed; water outlet holes are evenly arranged on the cooling water pipe (5) under the cover plate (4); and a cooling water control valve (7) is provided at the water inlet end of the cooling water pipe (5).

10. A gravity casting device for high and low pressure seal bearing alloy according to claim 9, characterized in that: The size of the cover plate (4) matches the size of the outer diameter of the bearing body (9), and the bottom end of the cover plate (4) is provided with a clamping table (11) matching the inner diameter of the bearing body (9).

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