A mold and method for forming a root of a skewed narrow swirl hole of a swirler

Abstract

The application discloses a mold and a method for forming a root R of a slant narrow cyclone hole of a vortex former, and belongs to the technical field of investment precision casting production. The mold disclosed by the application can realize one-time forming of the core-pulling structure of the inner and outer side round corners of the ceramic forming part channel through the simulation of the mold opening process and the setting of specific core-pulling structures in the inner core-pulling, so that the mold opening of each core-pulling is ensured, the operation difficulty caused by too many core-pulling pieces is avoided, the forming of the inner and outer side round corners of the channel is realized, the wax mold repairing time is reduced, the consistency of the wax piece is improved, the technical problem of irregular size existing in the traditional method is solved, the appearance quality and the qualified rate of the vortex former are improved, and the working strength of workers is reduced.

Description

Technical Field

[0001] This invention belongs to the field of investment casting production technology, specifically relating to a mold and method for forming the root R of the oblique narrow vortex hole of a vortex generator. Background Technology

[0002] Axial vortex generators are mainly designed to adapt to high-temperature rise and high-heat-load combustion chambers. They can ensure a suitable airflow at the head of the flame tube and have good aerodynamic atomization performance.

[0003] The vortex generator structure consists of an internal cavity and an annular wall. It is difficult to achieve the internal cavity of this casting using traditional wax mold molding. Generally, the wax mold cavity is formed by secondary molding with a ceramic core.

[0004] Existing technology, when molding ceramic cores, cannot achieve the forming of the inner rounded corners of the two channels due to mold structure issues. It resorts to manual trimming of the upper rounded corners of the ceramic core to achieve this, resulting in unstable channel dimensions and irregular rounded corner appearance. Because the R-rounded corners of the ceramic core are irregular due to manual trimming, the channel dimensions of the casting are unstable, causing unstable flow detection. This results in channels being scrapped due to excessive flow and reworked due to insufficient flow. After rework, the channel appearance is poor, and there are also cases where the air flow is too high after rework, resulting in scrap. This leads to a low pass rate for this type of casting and causes significant economic losses.

[0005] Currently, such as Figure 1 As shown, when designing the ceramic core mold for the eddy current generator, a pull-out method is adopted on one side, ignoring the rotation angle R on the other side. Figure 1 (The area marked R) has a very small fillet and is located on the spiral ridge of the inner cavity. The fillet on the core is manually polished, which is technically difficult, requires high skill from workers, and makes it hard to guarantee consistency. The consistency of the channel flow cannot be guaranteed, which increases the casting cycle and makes it difficult to guarantee the appearance quality of the eddy current generator. Summary of the Invention

[0006] The purpose of this invention is to provide a mold and method for forming the root R of the narrow vortex orifice of a vortex generator, which solves the technical problem of irregular dimensions in existing manual repair methods.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] This invention discloses a mold for forming the root R of a narrow vortex orifice in a vortex generator, comprising an upper cover plate, an upper template, a locking frame, a middle template, a lower template, and an injection channel. The upper cover plate, upper template, locking frame, middle template, and lower template are stacked sequentially from top to bottom. A guide block is provided between the upper template and the locking frame to fix the upper template and the locking frame and ensure the angular positioning of the mold. A core-pulling structure is provided between the locking frame, middle template, and lower template to achieve one-time forming of the inner and outer rounded corners of the ceramic forming part channel. A cavity is formed between the core-pulling structure, the locking frame, and the middle template. The injection channel passes through the upper cover plate, upper template, locking frame, middle template, and lower template and is connected to the cavity.

[0009] Furthermore, the core-pulling structure includes a composite core-pulling structure and a bottom insert perpendicular to the composite core-pulling structure; the locking frame has a circular cross-section; the composite core-pulling structure includes a plurality of spaced circumferential and radial inserts, a conical pin, and a plurality of core-pulling components; the plurality of spaced circumferential and radial inserts are arranged circumferentially and spaced apart from each other on a cross-section inside the locking frame around the central axis of the locking frame; the conical pin coincides with the central axis of the locking frame and is connected to the plurality of spaced circumferential and radial inserts to control the axial position of the circumferential and radial inserts;

[0010] The plurality of core-pulling components are disposed between the composite core-pulling structure and the bottom insert, and are evenly disposed on another cross section inside the locking frame around the central axis where the conical pin is located, and each core-pulling component is radially disposed along the central axis where the conical pin is located; one end of the bottom insert passes through the middle template and is connected to the lower template, and the other end is connected to the central axis where the plurality of core-pulling components are located.

[0011] Furthermore, the cross-section of the plurality of core-pulling components is close to the lower template.

[0012] Furthermore, the area where the bottom insert connects to the locking frame and the middle template forms a cavity.

[0013] Furthermore, the radial insert includes a first insert, a third insert, a fifth insert, and a seventh insert; the circumferential insert includes a second insert, a fourth insert, a sixth insert, and an eighth insert; the first insert, the third insert, the fifth insert, and the seventh insert are respectively disposed between the second insert and the eighth insert, between the second insert and the fourth insert, between the fourth insert and the sixth insert, and between the sixth insert and the eighth insert.

[0014] Furthermore, the tapered pin is connected to the first insert, the third insert, the fifth insert, the seventh insert, the second insert, the fourth insert, the sixth insert, and the eighth insert, respectively, to control the axial position.

[0015] Furthermore, the number of core-pulling components is twelve.

[0016] The present invention also discloses a demolding method using the above-mentioned mold, comprising the following steps:

[0017] First, remove the top cover plate, the interconnected upper template, the locking frame, and the guide block in sequence; then remove the core-pulling structure in sequence to achieve one-time forming of the inner and outer rounded corners of the ceramic molding part channel; finally, remove the ceramic molding part.

[0018] Furthermore, the core-pulling structure includes a composite core-pulling structure and a bottom insert perpendicular to the composite core-pulling structure; the composite core-pulling structure includes a plurality of spaced circumferential and radial inserts, a conical pin, and a plurality of core-pulling components; the plurality of spaced circumferential and radial inserts are arranged circumferentially and at intervals around the central axis of the locking frame on a cross-section inside the locking frame; the conical pin coincides with the central axis of the locking frame and is connected to the plurality of spaced circumferential and radial inserts to control the axial position of the circumferential and radial inserts;

[0019] The plurality of core-pulling components are evenly arranged around the conical pin on another cross section inside the locking frame, and each core-pulling component is arranged radially along the conical pin; the cross section where the plurality of core-pulling components are located is close to the lower template; one end of the bottom insert passes through the middle template and connects to the lower template, and the other end is connected to the conical pin at the plurality of core-pulling locations;

[0020] The demolding process includes the following steps:

[0021] First, remove the top cover plate, the interconnected upper template, the locking frame, and the guide block in sequence; then, pull out the conical pin; next, remove the circumferential insert, the radial insert, and several core-pulling parts in sequence to achieve one-time forming of the inner and outer rounded corners of the ceramic molding part channel; finally, remove the ceramic molding part.

[0022] Further, the radial insert includes a first insert, a third insert, a fifth insert, and a seventh insert; the circumferential insert includes a second insert, a fourth insert, a sixth insert, and an eighth insert; the first insert, the third insert, the fifth insert, and the seventh insert are respectively disposed between the second insert and the eighth insert, between the second insert and the fourth insert, between the fourth insert and the sixth insert, and between the sixth insert and the eighth insert; the tapered pin is connected to the first insert, the third insert, the fifth insert, the seventh insert, the second insert, the fourth insert, the sixth insert, and the eighth insert, respectively;

[0023] The specific steps for removing the circumferential inlay and the radial inlay in sequence are as follows:

[0024] After removing the conical pin, remove the first, third, fifth, and seventh inserts in sequence, and then move towards the center to remove the second, fourth, sixth, and eighth inserts in sequence.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention discloses a mold for forming the root R of the narrow vortex orifice of a vortex generator. Based on the different angular distribution of each blade along the circumference, a specific core-pulling structure is set in the inner core-pulling section by simulating the mold opening process. This core-pulling structure can achieve one-time forming of the inner and outer rounded corners of the ceramic forming part channel. It ensures the demolding of each core without the operational difficulties caused by too many core-pulling parts. The forming of the inner and outer rounded corners of the channel reduces the wax model repair time, improves the consistency of the wax parts, solves the technical problem of irregular dimensions in traditional methods, improves the appearance quality and pass rate of the vortex generator, and reduces the labor intensity of workers.

[0027] Furthermore, by simulating the mold opening process, this invention sets the specific core-pulling structure as eight circumferential inserts. This ensures the demolding of each core without causing operational difficulties due to an excessive number of core-pulling parts. At the same time, to ensure a smooth transition of the inner channel's rounded corners without any mold lines, it is necessary to ensure a tight fit between the inner and outer core-pulling parts. In addition, to ensure accurate positioning of the inner core, a longer positioning section is added to the top of the four cores, and a 3mm radial positioning is added or removed from the bottom of the core. The center is locked with a 15mm conical pin, which is sufficient to ensure accurate positioning of the inner core.

[0028] This invention also discloses a demolding method for the aforementioned mold. Through mold structure design, the mold for forming the root R of the narrow vortex hole of the vortex generator according to this invention can achieve one-time integral forming of the root R of the vortex generator blades and is easy to operate. The forming of the inner and outer rounded corners of the channel on the ceramic core is realized, thereby reducing the wax model repair time, improving the consistency of the wax parts, improving the appearance quality and pass rate of the vortex generator, ensuring the air flow of the vortex generator, significantly improving the casting pass rate, and resulting in obvious economic benefits. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the precision-cast eddy coaxial fillet R structure of the eddy current generator targeted by the present invention;

[0030] Figure 2 This is a schematic diagram of the overall structure of the mold for forming the root R of the narrow vortex orifice of the vortex generator according to the present invention.

[0031] Wherein: a-front view; b-longitudinal section view; c-transverse section view;

[0032] Figure 3 This is a schematic diagram of the composite core-pulling structure of the present invention.

[0033] Wherein: 1-Upper cover plate; 2-Upper template; 3-Locking frame; 4-Middle template; 5-Lower template; 6-Guide block; 7-First insert; 8-Second insert; 9-Third insert; 10-Fourth insert; 11-Fifth insert; 12-Sixth insert; 13-Seventh insert; 14-Eighth insert; 15-Conical pin; 16-Bottom insert; 17-Core pull component; 18-Cavity position; 19-Injection channel. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] like Figure 2 As shown, this invention discloses a mold for forming the root R of the narrow vortex hole of a vortex generator, including an upper template 2, a locking frame 3, and a guide block 6 that cooperate with each other (in use, the upper template 2, the locking frame 3, and the guide block 6 are a whole); an upper cover plate 1 is set above the upper template 2; a middle template 4 and a lower template 5 are arranged sequentially at the lower part of the locking frame 3; wherein, a core-pulling structure is provided between the locking frame 3, the middle template 4, and the lower template 5 to realize the one-time forming of the inner and outer rounded corners of the ceramic forming part channel, and a cavity position 18 is formed therein.

[0037] By simulating the mold opening process, such as Figure 3As shown, the core-pulling structure of the present invention consists of a composite core-pulling structure and a bottom insert 16 perpendicular to the composite core-pulling structure. The composite core-pulling structure includes several spaced-apart circumferential and radial inserts, a conical pin 15, and several core-pulling components 17. The spaced-apart circumferential and radial inserts are arranged circumferentially around the central axis of the locking frame 3 on a cross-section inside the locking frame 3. Several core-pulling components 17 are positioned between the composite core-pulling structure and the bottom insert 16, and are evenly distributed around the central axis of the conical pin 15 on another cross-section inside the locking frame 3. Each core-pulling component 17 is radially arranged along the central axis of the conical pin 15. The position and fit of the core-pulling components 17 are ensured by the middle template 4. A total of twelve core-pulling components 17 are provided to ensure the forming of the outer R of the ceramic core. The bottom insert 16... One end passes through the middle template 4 and connects to the lower template 5, and the other end is connected to the central axis of several core-pulling parts 17. The bottom insert 16 ensures the forming of the insert in the mold. The radial insert includes a first insert 7, a third insert 9, a fifth insert 11, and a seventh insert 13. The circumferential insert includes a second insert 8, a fourth insert 10, a sixth insert 12, and an eighth insert 14. The first insert 7, the third insert 9, the fifth insert 11, and the seventh insert 13 are respectively disposed between the second insert 8 and the eighth insert 14, between the second insert 8 and the fourth insert 10, between the fourth insert 10 and the sixth insert 12, and between the sixth insert 12 and the eighth insert 14. The conical pin 15 is connected to the first insert 7, the third insert 9, the fifth insert 11, the seventh insert 13, the second insert 8, the fourth insert 10, the sixth insert 12, and the eighth insert 14.

[0038] The bottom insert 16 forms a cavity position 18 in the area where it is connected to the locking frame 3 and the middle template 4. When the mold of the present invention is working, the ceramic core slurry is injected from the injection channel 19 and fills the cavity position 18. After molding, the ceramic molded part is taken out.

[0039] To ensure accurate positioning of the inner core puller, longer positioning sections were added to the top of the four core pullers, and a 3mm radial positioning section was added or removed from the bottom of the core puller. The center is locked with a 15mm conical pin, which is sufficient to ensure accurate positioning of the inner core puller.

[0040] The demolding method for the mold of the root R of the oblique narrow vortex hole of the vortex generator disclosed in this invention includes the following steps:

[0041] First, remove the upper cover plate 1, the interconnected upper template 2, the locking frame 3, and the guide block 6 in sequence (where the upper template 2, locking frame 3, and guide block 6 are a single unit). Then, pull out the conical pin 15 to make room for the middle insert. Next, pull out the first insert 7, the third insert 9, the fifth insert 11, and the seventh insert 13 in sequence upwards. Then, push towards the center and pull out the second insert 8, the fourth insert 10, the sixth insert 12, and the eighth insert 14 in sequence. Next, pull out several core-pulling parts 17, and finally remove the ceramic molded part. This mold and method achieve one-time molding of the inner and outer rounded corners of the channel, reducing wax mold repair time, improving the consistency of wax parts, improving the appearance quality and pass rate of the vortex generator, ensuring the airflow of the vortex generator, and reducing the labor intensity of workers by achieving one-time integral molding of the root R of the vortex generator blades, which is easy to operate.

[0042] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A mold for forming the root R of a narrow, oblique vortex orifice in a vortex generator, characterized in that, The mold includes an upper cover plate (1), an upper template (2), a locking frame (3), a middle template (4), a lower template (5), and an injection channel (19). The upper cover plate (1), upper template (2), locking frame (3), middle template (4), and lower template (5) are stacked sequentially from top to bottom. A guide block (6) is provided between the upper template (2) and the locking frame (3) to fix the upper template (2) and the locking frame (3) to ensure the angular positioning of the mold. A core-pulling structure is provided between the locking frame (3), the middle template (4), and the lower template (5) to realize the one-time forming of the inner and outer rounded corners of the ceramic molding part channel. A cavity position (18) is formed between the core-pulling structure, the locking frame (3), and the middle template (4). The injection channel (19) passes through the upper cover plate (1), the upper template (2), the locking frame (3), the middle template (4), and the lower template (5), and is connected to the cavity position (18). The core-pulling structure includes a composite core-pulling structure and a bottom insert (16) perpendicular to the composite core-pulling structure; the cross-section of the locking frame (3) is circular; the composite core-pulling structure includes several spaced circumferential inserts and radial inserts, a conical pin (15) and several core-pulling components (17); the several spaced circumferential inserts and radial inserts are arranged circumferentially and spaced apart from each other on a cross-section inside the locking frame (3) around the central axis of the locking frame (3); the conical pin (15) coincides with the central axis of the locking frame (3) and is connected to the several spaced circumferential inserts and radial inserts to control the axial position of the circumferential inserts and radial inserts; The plurality of core-pulling components (17) are arranged between the composite core-pulling structure and the bottom insert (16), and are evenly arranged on another cross section inside the locking frame (3) around the central axis where the conical pin (15) is located, and each core-pulling component (17) is arranged radially along the central axis where the conical pin (15) is located; one end of the bottom insert (16) passes through the middle template (4) and is connected to the lower template (5), and the other end is connected to the central axis where the plurality of core-pulling components (17) are located.

2. The mold for forming the root R of the oblique narrow vortex orifice of a vortex generator according to claim 1, characterized in that, The cross-section of the plurality of core-pulling parts (17) is close to the lower template (5).

3. The mold for forming the root R of the oblique narrow vortex orifice of a vortex generator according to claim 1, characterized in that, The area where the bottom insert (16) connects with the locking frame (3) and the middle template (4) forms a cavity position (18).

4. The mold for forming the root R of the oblique narrow vortex orifice of a vortex generator according to claim 1, characterized in that, The radial inserts include a first insert (7), a third insert (9), a fifth insert (11), and a seventh insert (13); the circumferential inserts include a second insert (8), a fourth insert (10), a sixth insert (12), and an eighth insert (14); the first insert (7), the third insert (9), the fifth insert (11), and the seventh insert (13) are respectively disposed between the second insert (8) and the eighth insert (14), between the second insert (8) and the fourth insert (10), between the fourth insert (10) and the sixth insert (12), and between the sixth insert (12) and the eighth insert (14).

5. The mold for forming the root R of the oblique narrow vortex orifice of a vortex generator according to claim 4, characterized in that, The tapered pin (15) is connected to the first insert (7), the third insert (9), the fifth insert (11), the seventh insert (13), the second insert (8), the fourth insert (10), the sixth insert (12), and the eighth insert (14) respectively, to control the axial position.

6. The mold for forming the root R of the oblique narrow vortex orifice of a vortex generator according to claim 4, characterized in that, The number of core-pulling components (17) is twelve.

7. A demolding method for a mold for forming the root R of a narrow vortex orifice of a vortex generator as described in any one of claims 1 to 6, characterized in that, Includes the following steps: First, remove the top cover plate (1), the interconnected upper template (2), the locking frame (3), and the guide block (6) in sequence; then remove the core-pulling structure in sequence to achieve one-time forming of the inner and outer rounded corners of the ceramic molding part channel; finally, remove the ceramic molding part. The core-pulling structure includes a composite core-pulling structure and a bottom insert (16) perpendicular to the composite core-pulling structure; the composite core-pulling structure includes a number of spaced circumferential inserts and radial inserts, a conical pin (15) and a number of core-pulling components (17); the number of spaced circumferential inserts and radial inserts are arranged circumferentially around the central axis of the locking frame (3) on a cross section inside the locking frame (3); the conical pin (15) coincides with the central axis of the locking frame (3) and is connected to the number of spaced circumferential inserts and radial inserts to control the axial position of the circumferential inserts and radial inserts; The plurality of core-pulling components (17) are evenly arranged around the conical pin (15) on another cross section inside the locking frame (3), and each core-pulling component (17) is arranged radially along the conical pin (15); the cross section where the plurality of core-pulling components (17) are located is close to the lower template (5); one end of the bottom insert (16) passes through the middle template (4) and is connected to the lower template (5), and the other end is connected to the conical pin (15) at the plurality of core-pulling components (17); The demolding process includes the following steps: First, take out the top cover plate (1), the upper template (2) connected to each other, the locking frame (3) and the guide block (6) in sequence; then, pull out the conical pin (15), and then take out the circumferential insert, the radial insert and several core-pulling parts (17) in sequence to realize the one-time forming of the inner and outer rounded corners of the ceramic molding part channel, and finally take out the ceramic molding part.

8. A demolding method for a mold for forming the root R of a narrow vortex orifice of a vortex generator according to claim 7, characterized in that, The radial inserts include a first insert (7), a third insert (9), a fifth insert (11), and a seventh insert (13); the circumferential inserts include a second insert (8), a fourth insert (10), a sixth insert (12), and an eighth insert (14); the first insert (7), the third insert (9), the fifth insert (11), and the seventh insert (13) are respectively disposed between the second insert (8) and the eighth insert (14), between the second insert (8) and the fourth insert (10), between the fourth insert (10) and the sixth insert (12), and between the sixth insert (12) and the eighth insert (14); the conical pin (15) is connected to the first insert (7), the third insert (9), the fifth insert (11), the seventh insert (13), the second insert (8), the fourth insert (10), the sixth insert (12), and the eighth insert (14); The specific steps for removing the circumferential inlay and the radial inlay in sequence are as follows: After removing the conical pin (15), remove the first insert (7), the third insert (9), the fifth insert (11) and the seventh insert (13) in sequence, and then move towards the middle to remove the second insert (8), the fourth insert (10), the sixth insert (12) and the eighth insert (14).

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