Vertical centrifugal casting tool for cylindrical thin-wall component with replaceable size

Abstract

The invention discloses a vertical centrifugal casting tool for a cylindrical thin-wall component with a replaceable size, and aims to solve the problem that most existing vertical centrifugal casting molds are fixed in size and are difficult to be suitable for centrifugal casting of cavity molds with different sizes. According to the vertical centrifugal casting tool, the bottom of a large pouring jacket is connected with a bottom plate through bolts, a plurality of supporting plate positioning blocks are arranged on the inner wall of a box body of the large pouring jacket in the circumferential direction, a round hole is formed in the middle of a supporting plate, the supporting plate is in lap joint with the supporting plate positioning blocks and is fixed through bolts, and box body positioning blocks are arranged on the outer wall of the middle of a box body of a small pouring jacket; box body positioning blocks of the small pouring jackets are erected on the edges of the circular holes and are fixed to the supporting plate through screws, four lower sprue frames are vertically arranged on the ground, and an upper sprue frame is erected on the tops of the four lower sprue frames. Molten metal is rapidly filled under the action of centrifugal force, and the device is suitable for producing thin-wall parts; the pouring gate frame is flexible to use and can be switched between a large pouring jacket and a small pouring jacket, and the height of the pouring gate frame can be adjusted 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-size cylindrical thin-walled components. Background Art

[0002] Vertical centrifugal casting is a casting method in which molten metal is poured into a mold rotating around a vertical axis during the casting process, so that it fills the mold and solidifies under the action of centrifugal force. Due to the action of centrifugal force, the molten metal is evenly distributed in the mold to form a dense casting with good mechanical properties, and can cast complex shapes, reduce subsequent processing steps, and improve production efficiency. In addition, since waste is reduced during the casting process, the utilization rate of materials can be effectively improved. Not only that, high efficiency and high material utilization rate make vertical centrifugal casting more economically competitive, and it is widely used in machinery manufacturing, automotive industry, aerospace and other fields.

[0003] In vertical centrifugal casting, a cylindrical cavity mold is often used, and the mold is rotated at high speed with its axis as the axis center, and the molten metal is injected into the mold by centrifugal force to fill the mold, thereby manufacturing a hollow casting. At present, most of the molds used for vertical centrifugal casting are fixed in size. When such a mold is used to cast a smaller casting, not only a large amount of molding sand is wasted, but also the labor intensity of the operator is greatly increased. 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 invention aims to solve the problem that most of the existing vertical centrifugal casting molds are of fixed size and are difficult to be applied to the centrifugal casting of cavity molds of different sizes. The invention provides a vertical centrifugal casting tool for cylindrical thin-walled components with replaceable sizes, which can flexibly switch between large-size sleeves 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 replaceable size of the present invention comprises an upper gate frame, a cover plate, a small sleeve box, a support plate, a large sleeve box, a lower gate frame and a bottom plate, the bottom of the large sleeve box is connected with the bottom plate by bolts, the bottom plate is connected with the turntable of the vertical centrifuge by bolts, a plurality of support plate positioning blocks are arranged on the inner wall of the box body of the large sleeve box 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 on the support plate positioning blocks by bolts;

[0006] A box positioning block is arranged on the outer wall of the middle part of the box body of the small box, and 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 connected by bolts. A casting hole is opened at the center of the cover plate.

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

[0008] The large casting of the present invention is positioned by a support plate positioning block inside a large casing. The large casting and the small casting 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 bottom of the inner side of the casting.

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

[0010] The molten metal can be quickly filled into 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 boxes, and can adjust the height of the gate frame according to working conditions, with high work efficiency. It has a simple structure, is easy to install, disassemble and pour, 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 replaceable size according to the present invention;

[0012] Figure 2 It is a schematic diagram of the internal structure of the vertical centrifugal casting tooling of the cylindrical thin-walled component with replaceable size according to the present invention;

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

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

[0015] Figure 5 A vertical cross-sectional view of a vertical centrifugal casting tooling 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 tooling including a small casting 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 in-mold pouring in the vertical centrifugal casting tooling of the cylindrical thin-walled component with replaceable size of 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 implementation method 1: The vertical centrifugal casting tooling of a cylindrical thin-walled component with replaceable size in this implementation method includes an upper gate frame 1, a cover plate 2, a small sleeve box 3, a support plate 4, a large sleeve box 5, a lower gate frame 6 and a bottom plate 7. The bottom of the large sleeve box 5 is connected with 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 arranged on the inner wall of the box body of the large sleeve box 5 in the circumferential direction, 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 arranged on the outer wall of the middle part of the box body of the small box 3, and 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 set 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 by bolts. A pouring hole is opened at the center of the cover plate 2.

[0021] Four lower pouring gate frames 6 are vertically arranged on the ground, an upper pouring gate frame 1 is arranged on the top of the four lower pouring gate frames 6 , a lower material port is arranged on the upper pouring 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 quickly complete the filling of the mold under the action of centrifugal force, and good filling can be achieved through this casting system, which is very suitable for the production of thin-walled parts; it is flexible to use, can switch between large and small sleeves, and can adjust the height of the gate frame according to working conditions, and has high work efficiency; it has a simple structure, is convenient for installation and disassembly and casting, can reduce labor intensity and improve casting quality.

[0024] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that a cross reinforcement rib with holes is provided on the outer wall of the large casing 5 .

[0025] Specific implementation method three: This implementation method is different from specific implementation methods one or two in that grooves are provided on the upper and lower sides of the middle part 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 specific embodiments 1 to 3 in that a lifting lug is provided on the upper surface of the support plate 4 .

[0028] Specific implementation mode 5: This implementation mode is different from specific implementation modes 1 to 4 in that the small casing 3 is cylindrical, and a lifting lug is arranged on the outer wall of the casing of the small casing 3 .

[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 pouring gate frame 6 .

[0030] Specific embodiment 7: This embodiment is different from any one of specific embodiments 1 to 6 in that the lower pouring gate frame 6 is provided with a height adjustment mechanism.

[0031] Specific embodiment eight: This embodiment is different from any one of specific embodiments one to seven in that four support plate positioning blocks 11 are arranged on the circumferential direction of the inner wall of the large box 5 .

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

[0033] Specific embodiment ten: This embodiment is different from any one of specific embodiments one to nine in 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 arranged in the large casing 5, and a cylindrical casting-shaped cavity is arranged inside the large casting mold 9.

[0034] Embodiment: The vertical centrifugal casting tooling of a cylindrical thin-walled component with replaceable size in this embodiment comprises an upper gate frame 1, a cover plate 2, a small sleeve box 3, a support plate 4, a large sleeve box 5, a lower gate frame 6 and a bottom plate 7. The bottom of the large sleeve box 5 is connected with the bottom plate 7 by bolts, and the bottom plate 7 is connected with the turntable of the vertical centrifuge by bolts. A plurality of support plate positioning blocks 11 are arranged on the inner wall of the box body of the large sleeve box 5 in the circumferential direction, 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;

[0035] A box positioning block 12 is arranged on the outer wall of the middle part of the box body of the small box 3, and 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 set 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 by bolts. A pouring hole is opened at the center of the cover plate 2.

[0036] Four lower pouring gate frames 6 are vertically arranged on the ground, and the lower pouring gate frames 6 are provided with a height adjustment mechanism, and 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, and a plurality of horizontal through holes are opened in the inner column 6-1 and the outer column 6-2 along the height direction, and the adjusting bolt 6-3 is inserted into the horizontal through hole to adjust the height of the lower pouring gate frame 6; an upper pouring gate frame 1 is arranged on the top of the four lower pouring gate frames 6, and a lower material port is arranged on the upper pouring gate frame 1, and the lower material port is connected with a pouring hole on the cover plate 2;

[0037] When casting a small-sized cylindrical thin-walled component, a small casting mold 10 is arranged 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. 1 , the sprue position coincides with the rotation axis, the sprue bottom radially extends to the horizontal direction to form an ingode, the sprue and ingode cross-section are circular, and the ingode end contacts the inner bottom of the casting;

[0038] 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, which 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 cylindrical thin-walled component with replaceable size of the present invention is as follows: the bottom plate 7 is placed on the turntable of the vertical centrifuge, the large sleeve 5 is placed on the bottom plate 7, and the large sleeve 5, the bottom plate 7, and the centrifuge turntable are fixed with bolts and nuts, the support plate 4 is placed in the large sleeve 5, and is positioned by the support plate positioning block in the large sleeve 5, the small casting mold 10 is placed in the small sleeve 3, the small sleeve 3 is placed on the support plate 4, and is positioned by the small sleeve positioning block on the support plate 4, the cover plate 2 is placed on the large sleeve 5, and the cover plate 2 and the large sleeve 5 are fastened with bolts, and the casting mold installation is completed. The upper pouring gate frame 1 is set just above the cover plate, and after adjusting to a suitable height through 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 pouring gate frame 6 is adjusted so that the discharge port of the upper pouring gate frame 1 is aligned with the pouring hole on the cover plate 2, and pouring can be carried out.

[0040] In the vertical centrifugal casting process, the molten metal is poured into a mold rotating around a vertical axis, so that it fills the mold and solidifies 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 gates can allow the molten metal subjected to the centrifugal force to fill the mold to the position of the casting cavity 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 supporting 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 invention has the following advantages: flexible use, capable of switching between a large casing and a small casing, capable of adjusting the height of the pouring frame according to working conditions, and high working efficiency; simple structure, convenient installation, 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 in that The vertical centrifugal casting tooling comprises an upper gate frame (1), a cover plate (2), a small sleeve box (3), a support plate (4), a large sleeve box (5), a lower gate frame (6) and a bottom plate (7); the bottom of the large sleeve box (5) is connected to the bottom of 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 arranged on the inner wall of the large sleeve box (5) in the circumferential direction; bolt holes are formed on the support plate positioning blocks (11); a circular hole is formed 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 arranged 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 large box (5) and is fastened by bolts; a casting hole is opened at the center of the cover plate (2); Four lower pouring gate frames (6) are vertically arranged on the ground, an upper pouring gate frame (1) is arranged on the top of the four lower pouring gate frames (6), a lower material port is arranged on the upper pouring gate frame (1), and the lower material port is connected to a pouring hole on a cover plate (2).

2. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that A cross reinforcing rib with holes is arranged on the outer wall of the box body 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 arranged on the upper and lower sides of the middle part 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 arranged on the upper surface of the support 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 sleeve box (3) is cylindrical, and a lifting lug is arranged on the outer wall of the small sleeve box (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 arranged at the bottom of the lower pouring 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 pouring 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 arranged on the inner wall of the large casing (5) in the circumferential direction.

9. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in that When casting a small-sized cylindrical thin-walled component, a small casting mold (10) is arranged in a small casing (3), and a cavity in the shape of a cylindrical casting is arranged inside the small casting mold (10).

10. The vertical centrifugal casting tool for cylindrical thin-walled components with interchangeable sizes according to claim 1, characterized in 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 arranged in the large casing (5), and a cavity in the shape of a cylindrical casting is arranged inside the large casting mold (9).

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