A vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes

Abstract

A vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes is disclosed. The present invention aims to address the problem that existing vertical centrifugal casting molds are mostly fixed in size, making them difficult to adapt to centrifugal casting of cavity molds of different sizes. In the vertical centrifugal casting tool disclosed herein, a base plate is bolted to the bottom of a large casing. Multiple support plate positioning blocks are circumferentially arranged on the inner wall of the casing of the large casing. A circular hole is opened in the middle of the support plate. The support plate is overlapped on the support plate positioning blocks and fixed by bolts. A casing positioning block is provided on the outer wall of the casing of the small casing. The casing positioning block of the small casing is mounted on the edge of the circular hole and fixed to the support plate by screws. Four lower sprue frames are vertically arranged on the ground, and an upper sprue frame is mounted on top of the four lower sprue frames. The present invention allows molten metal to quickly fill the mold under the action of centrifugal force, making it suitable for producing thin-walled components. The tool is flexible to use, can be switched between large and small casings, and can adjust the height of the sprue frame according to working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of casting, and in particular relates to a vertical centrifugal casting tool for large-sized cylindrical thin-walled components. Background Art

[0002] Vertical centrifugal casting is a casting method in which molten metal is poured into a mold rotating about a vertical axis. Centrifugal force causes the metal to fill the mold and solidify. Centrifugal force evenly distributes the molten metal within the mold, forming a dense casting with excellent mechanical properties. This allows for the creation of complex shapes, reduces subsequent processing steps, and improves production efficiency. Furthermore, by reducing waste during the casting process, material utilization can be effectively improved. Furthermore, these high efficiency and material utilization make vertical centrifugal casting economically competitive, and it is widely used in machinery manufacturing, the automotive industry, aerospace, and other fields.

[0003] In vertical centrifugal casting, a cylindrical cavity mold is often used. The mold rotates at high speed around its axis, and the centrifugal force causes molten metal to be injected into the mold to fill the mold, thereby producing a hollow core casting. Currently, most vertical centrifugal casting molds are fixed-size. When casting smaller castings, such molds not only waste a large amount of molding sand, but also greatly increase the labor intensity of the operator. Therefore, there is an urgent need for a mold that can be flexibly switched between large and small sizes, thereby reducing the amount of molding sand used and reducing the labor intensity of the operator. Summary of the Invention

[0004] The present invention aims to solve the problem that most existing vertical centrifugal casting molds are of fixed size and are difficult to be applied to centrifugal casting of cavity molds of different sizes. The present invention provides a vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes. The tool can flexibly switch between large-size and small-size sleeves and can adjust the height of the gate frame according to working conditions, thereby reducing the amount of molding sand used, reducing the labor intensity of the operator, and improving work efficiency.

[0005] The vertical centrifugal casting tooling of a cylindrical thin-walled component with interchangeable sizes of the present invention comprises an upper gate frame, a cover plate, a small sleeve, a support plate, a large sleeve, a lower gate frame and a bottom plate. The bottom of the large sleeve is connected to the bottom plate by bolts, and the bottom plate is connected to the turntable of the vertical centrifuge by bolts. A plurality of support plate positioning blocks are provided on the inner wall of the large sleeve in the circumferential direction. Bolt holes are opened on the support plate positioning blocks. A circular hole is opened in the middle of the support plate. The support plate is overlapped on the support plate positioning blocks and fixed to the support plate positioning blocks by bolts.

[0006] A box positioning block is provided on the outer wall of the middle part of the box body of the small box. The small box is placed in the circular hole of the support plate. The box positioning block of the small box is placed on the edge of the circular hole and fixed to the support plate by screws. The cover plate is placed on the top of the large box and is fastened with bolts. A pouring hole is opened at the center of the cover plate.

[0007] Four lower gate frames are vertically arranged on the ground, an upper gate frame is arranged on the top of the four lower gate frames, a lower material port is arranged on the upper gate frame, and the lower material port is communicated with a pouring hole on the cover plate.

[0008] The large casting mold of the present invention is positioned by the support plate positioning block inside the large casing. The large casting mold and the small casting mold are respectively provided with a cylindrical casting-shaped cavity, a straight runner and six ingates. The cross-sections of the straight runner and the ingates are circular, and the ends of the ingates are in contact with the inner bottom of the casting.

[0009] The beneficial effects of the vertical centrifugal casting tooling of the cylindrical thin-walled component with interchangeable sizes of the present invention are as follows:

[0010] The molten metal can quickly fill the mold under the action of centrifugal force. This pouring system can achieve good filling and is very suitable for the production of thin-walled parts. It is flexible to use and can switch between large and small casings. The height of the gate rack can be adjusted according to working conditions, which has high work efficiency. The structure is simple, which facilitates installation, disassembly and pouring, reduces labor intensity and improves pouring quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the vertical centrifugal casting tooling of the cylindrical thin-walled component with interchangeable sizes according to the present invention;

[0012] Figure 2 A schematic diagram of the internal structure of a vertical centrifugal casting tool for a cylindrical thin-walled component with interchangeable sizes according to the present invention;

[0013] Figure 3 This is an exploded view of the internal structure of the large box of the present invention;

[0014] Figure 4 A vertical cross-sectional view of a vertical centrifugal casting tool for a cylindrical thin-walled component with interchangeable dimensions according to the present invention (excluding the casting mold);

[0015] Figure 5 A vertical cross-sectional view of a vertical centrifugal casting tool including a large casting mold for a cylindrical thin-walled component with interchangeable sizes according to the present invention;

[0016] Figure 6 A vertical cross-sectional view of a vertical centrifugal casting tool including a small mold for a cylindrical thin-walled component with interchangeable sizes according to the present invention;

[0017] Figure 7It is a schematic structural diagram of the vertical centrifugal casting tooling for pouring a cylindrical thin-walled component with interchangeable dimensions according to the present invention;

[0018] Among them, 1-upper gate frame, 2-cover plate, 3-small sleeve box, 4-support plate, 5-large sleeve box, 6-lower gate frame, 7-bottom plate, 8-foot pad, 9-large casting mold, 10-small casting mold, 11-support plate positioning block, 12-box positioning block. DETAILED DESCRIPTION

[0019] Specific embodiment 1: The vertical centrifugal casting tooling of a cylindrical thin-walled component with interchangeable sizes in this embodiment includes an upper gate frame 1, a cover plate 2, a small sleeve 3, a support plate 4, a large sleeve 5, a lower gate frame 6 and a bottom plate 7. The bottom of the large sleeve 5 is connected to the bottom plate 7 by bolts, and the bottom plate 7 is connected to the turntable of the vertical centrifuge by bolts. A plurality of support plate positioning blocks 11 are provided on the circumferential direction of the inner wall of the large sleeve 5, and bolt holes are opened on the support plate positioning blocks 11. A circular hole is opened in the middle of the support plate 4, and the support plate 4 is overlapped on the support plate positioning block 11 and fixed on the support plate positioning block 11 by bolts;

[0020] A box positioning block 12 is provided on the outer wall of the middle part of the box body of the small box 3. The small box 3 is placed in the circular hole of the support plate 4. The box positioning block 12 of the small box 3 is placed on the edge of the circular hole and fixed to the support plate 4 by screws. The cover plate 2 is placed on the top of the large box 5 and is fastened with bolts. A pouring hole is opened at the center of the cover plate 2.

[0021] Four lower gate frames 6 are vertically arranged on the ground. An upper gate frame 1 is arranged on the top of the four lower gate frames 6 . A lower material port is arranged on the upper gate frame 1 , and the lower material port is communicated with a pouring hole on the cover plate 2 .

[0022] In this embodiment, two symmetrically placed lifting ears are provided on the upper side of the support plate 4, and a circular hole is provided in the middle. The circular hole is slightly larger than the outer diameter of the small casing, and is positioned vertically with the large casing by relying on the support plate positioning block inside the large casing.

[0023] In this embodiment, the molten metal can be quickly filled into the mold under the action of centrifugal force. This pouring system can achieve good filling, which is very suitable for the production of thin-walled parts. It is flexible to use and can switch between large and small sleeves. The height of the gate rack can be adjusted according to working conditions, and the work efficiency is high. It has a simple structure, is easy to install and disassemble, and pouring, can reduce labor intensity and improve pouring quality.

[0024] Specific embodiment 2: This embodiment is different from the specific embodiment 1 in that a cross reinforcement rib with holes is provided on the outer wall of the large box 5.

[0025] Specific embodiment three: This embodiment differs from specific embodiments one or two in that grooves are provided on the upper and lower sides of the middle portion of the bottom plate 7 , the longitudinal section of the upper groove is an isosceles trapezoid, and the longitudinal section of the lower groove is a rectangle.

[0026] The upper groove on the bottom plate of this embodiment is used to ensure the positioning of the large casting mold and the bottom plate, and the lower groove is used to ensure the positioning of the bottom plate and the centrifuge turntable.

[0027] Specific embodiment 4: This embodiment is different from any one of specific embodiments 1 to 3 in that a lifting lug is provided on the upper surface of the support plate 4 .

[0028] Specific embodiment 5: This embodiment is different from specific embodiments 1 to 4 in that the small box 3 is cylindrical, and a lifting lug is provided on the outer wall of the box.

[0029] Specific embodiment 6: This embodiment is different from specific embodiments 1 to 5 in that a foot pad 8 is provided at the bottom of the lower gate frame 6 .

[0030] Specific embodiment seven: This embodiment is different from any one of specific embodiments one to six in that the lower gate frame 6 is provided with a height adjustment mechanism.

[0031] Specific embodiment eight: The difference between this embodiment and any one of specific embodiments one to seven is that four support plate positioning blocks 11 are provided on the circumferential direction of the inner wall of the large box 5 .

[0032] Specific embodiment 9: This embodiment differs from specific embodiments 1 to 8 in that when casting a small-sized cylindrical thin-walled component, a small casting mold 10 is provided in the small casing 3, and a cylindrical casting-shaped cavity is provided inside the small casting mold 10.

[0033] Specific embodiment ten: The difference between this embodiment and any one of specific embodiments one to nine is that when casting a large-sized cylindrical thin-walled component, the small casing 3 and the support plate 4 are removed, and a large casting mold 9 is set in the large casing 5, and a cavity in the shape of a cylindrical casting is provided inside the large casting mold 9.

[0034] Embodiment: The vertical centrifugal casting tooling of a cylindrical thin-walled component with interchangeable sizes in this embodiment includes an upper gate frame 1, a cover plate 2, a small sleeve 3, a support plate 4, a large sleeve 5, a lower gate frame 6 and a bottom plate 7. The bottom of the large sleeve 5 is connected to the bottom plate 7 by bolts, and the bottom plate 7 is connected to the turntable of the vertical centrifuge by bolts. A plurality of support plate positioning blocks 11 are provided on the circumferential direction of the inner wall of the large sleeve 5, and bolt holes are opened on the support plate positioning blocks 11. A circular hole is opened in the middle of the support plate 4, and the support plate 4 is overlapped on the support plate positioning block 11 and fixed to the support plate positioning block 11 by bolts;

[0035] A box positioning block 12 is provided on the outer wall of the middle part of the box body of the small box 3. The small box 3 is placed in the circular hole of the support plate 4. The box positioning block 12 of the small box 3 is placed on the edge of the circular hole and fixed to the support plate 4 by screws. The cover plate 2 is placed on the top of the large box 5 and is fastened with bolts. A pouring hole is opened at the center of the cover plate 2.

[0036] Four lower sprue frames 6 are vertically arranged on the ground. The lower sprue frames 6 are equipped with a height adjustment mechanism. The height adjustment mechanism includes an inner column 6-1, an outer column 6-2, and an adjusting bolt 6-3. The inner column 6-1 is sleeved inside the outer column 6-2. A plurality of horizontal through holes are opened in the inner column 6-1 and the outer column 6-2 along the height direction. The adjusting bolts 6-3 are inserted into the horizontal through holes to adjust the height of the lower sprue frames 6. An upper sprue frame 1 is arranged on the top of the four lower sprue frames 6. A discharge port is arranged on the upper sprue frame 1. The discharge port is connected to the pouring hole on the cover plate 2.

[0037] When casting small-sized cylindrical thin-walled components, a small casting mold 10 is provided in the small casing 3. The small casting mold 10 is provided with a cavity in the shape of a cylindrical casting, a sprue and six ingates (such as Figure 7 As shown in FIG, the sprue position coincides with the rotation axis, the sprue bottom extends radially horizontally to form an ingode, the sprue and ingode cross-sections are circular, and the ingode end contacts the inner bottom of the casting;

[0038] When casting large-sized cylindrical thin-walled components, the small casing 3 and the support plate 4 are removed, and a large casting mold 9 is set in the large casing 5. It is positioned by the support plate positioning block 11 inside the large casing 5, and a cavity in the shape of a cylindrical casting is provided in the large casting mold 9.

[0039] The working process of the vertical centrifugal casting tooling of the interchangeable cylindrical thin-walled component of the present invention is as follows: the bottom plate 7 is placed on the turntable of the vertical centrifuge, the large casing 5 is placed on the bottom plate 7, and the large casing 5, the bottom plate 7, and the centrifuge turntable are fixed with bolts and nuts, the support plate 4 is placed in the large casing 5 and positioned by the support plate positioning block in the large casing 5, the small casting mold 10 is placed in the small casing 3, the small casing 3 is placed on the support plate 4, and positioned by the small casing positioning block on the support plate 4, the cover plate 2 is placed on the large casing 5, and the cover plate 2 and the large casing 5 are fastened with bolts, and the casting mold installation is completed. The upper sprue frame 1 is set just above the cover plate, and after adjusting it to the appropriate height through the bolts and bolt holes, pouring can be carried out; when a large casing is needed, after the large casing 5, the bottom plate 7 and the centrifuge turntable are fixed, the large casting mold 9 is placed in the large casing 5, and then the cover plate 2 is connected to the large casing 5 through bolts, and the height of the lower sprue frame 6 is adjusted so that the discharge port of the upper sprue frame 1 is aligned with the pouring hole on the cover plate 2, and pouring can be carried out.

[0040] During the vertical centrifugal casting process, molten metal is poured into a mold that rotates around a vertical axis, so that it fills the mold and solidifies into shape under the action of centrifugal force. A bottom pouring system is used to allow the molten metal to fill the mold smoothly from bottom to top. The six inner runners can allow the molten metal subjected to centrifugal force to fill the mold to the casting cavity position at a uniform and appropriate flow rate, and finally complete the filling under the action of centrifugal force, and obtain a cylindrical casting with a good shape and dense structure. The height adjustment of the upper gate frame can be completed by the bolt holes at different heights on the support legs of the upper gate frame and the lower gate frame, so that the gate frame can be at a suitable height in different production sites. When the volume of the mold needs to be adjusted, by adding or removing the support plate 4 and the small sleeve 3, it is possible to switch between a small volume mold and a large volume mold, thereby completing the internal volume adjustment of the mold.

[0041] The present invention has the following advantages: flexible use, can be switched between a large casing and a small casing, and can adjust the height of the pouring gate frame according to working conditions, with high working efficiency; simple structure, convenient installation and disassembly and pouring, can reduce labor intensity and improve pouring quality.

Claims

1. A vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes, characterized by: The vertical centrifugal casting tooling comprises an upper gate frame (1), a cover plate (2), a small sleeve (3), a support plate (4), a large sleeve (5), a lower gate frame (6) and a bottom plate (7). The bottom of the large sleeve (5) is connected to the bottom plate (7) by bolts. The bottom plate (7) is connected to the turntable of the vertical centrifuge by bolts. A plurality of support plate positioning blocks (11) are provided on the inner wall of the large sleeve (5) in the circumferential direction. Bolt holes are provided on the support plate positioning blocks (11). A circular hole is provided in the middle of the support plate (4). The support plate (4) is overlapped on the support plate positioning blocks (11) and fixed to the support plate positioning blocks (11) by bolts. A box body positioning block (12) is provided on the outer wall of the middle part of the box body of the small box (3), the small box (3) is placed in the circular hole of the support plate (4), the box body positioning block (12) of the small box (3) is placed on the edge of the circular hole and fixed to the support plate (4) by screws, the cover plate (2) is placed on the top of the box of the large box (5) and is fastened by bolts, and a casting hole is opened at the center of the cover plate (2); Four lower gate frames (6) are vertically arranged on the ground, an upper gate frame (1) is arranged on the top of the four lower gate frames (6), a lower material port is arranged on the upper gate frame (1), and the lower material port is connected to a pouring hole on the cover plate (2); When casting a small-sized cylindrical thin-walled component, a small casting mold (10) is provided in the small casing (3), and a cavity in the shape of a cylindrical casting is provided inside the small casting mold (10); When casting a large-sized cylindrical thin-walled component, the small casing (3) and the support plate (4) are removed, and a large casting mold (9) is arranged in the large casing (5), and a cavity in the shape of a cylindrical casting is arranged inside the large casting mold (9).

2. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that A cross reinforcement rib with holes is provided on the outer wall of the large casing (5).

3. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that Grooves are provided on the upper and lower sides of the middle portion of the bottom plate (7), the longitudinal section of the upper groove is an isosceles trapezoid, and the longitudinal section of the lower groove is a rectangle.

4. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that A lifting lug is provided on the upper surface of the supporting plate (4).

5. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that The small casing (3) is cylindrical, and a lifting lug is provided on the outer wall of the casing (3).

6. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that A foot pad (8) is provided at the bottom of the lower gate frame (6).

7. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that The lower gate frame (6) is provided with a height adjustment mechanism.

8. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that Four support plate positioning blocks (11) are provided on the circumferential direction of the inner wall of the large casing (5).

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