Mold core anti-deviation positioning equipment for casting machining

Abstract

The invention relates to the technical field of casting machining, in particular to mold core anti-deviation positioning equipment for casting machining, the mold core anti-deviation positioning equipment for casting machining is applied to a mold body, a mold cavity of the mold body comprises a cylindrical cavity, and the mold core anti-deviation positioning equipment comprises a plurality of positioning blocks and a plurality of positioning blocks, according to the mold core deviation-preventing positioning equipment for casting machining provided by the embodiment of the invention, the fixing effect on the mold core is improved by the mold core deviation-preventing positioning equipment for casting machining provided by the embodiment of the invention, the mold core deviation-preventing positioning equipment for casting machining has the advantages that the mold core deviation-preventing positioning equipment for casting machining is simple in structure and convenient to operate, and the mold core deviation-preventing positioning equipment for casting machining is suitable for popularization and application. And the product precision of castings is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of casting processing, and particularly to a core anti-deviation positioning device for casting processing. Background Art

[0002] During the casting processing, for castings with an inner cavity structure, the core technology is usually adopted for manufacturing. During the wax mold manufacturing process, the precise positioning of the core is crucial for ensuring product quality. Currently, in the manufacturing of high-precision castings such as valves, the core positioning mainly adopts an end positioning structure, that is, positioning protrusions are provided at both ends of the core, and positioning is carried out through the positioning holes at the end of the mold. This positioning method has a simple structure, but due to the small number of positioning points, when the wax liquid is injected at high speed, the core is prone to deviation. Especially when the core is relatively long, the middle part is more likely to shake, affecting the product accuracy. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the present invention provides a core anti-deviation positioning device for casting processing, which improves the fixing effect on the core and ensures the product accuracy of the casting.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the embodiments of the present application provide a core anti-deviation positioning device for casting processing, which is applied to a mold body. The mold cavity of the mold body includes a cylindrical cavity. The core anti-deviation positioning device includes: a plurality of positioning blocks, the plurality of positioning blocks having positioning portions located in the cylindrical cavity, the positioning portions being arranged around the core in the cylindrical cavity and respectively abutting against the outer peripheral surface of the core.

[0007] In a possible implementation manner, a plurality of radial chutes communicating with the cylindrical cavity are provided in the mold body, the radial chutes extending along the radial direction of the cylindrical cavity. The positioning block includes a sliding portion, and the sliding portion is slidably arranged in the radial chute. Among them, the positioning block can be switched between a first position and a second position. When the positioning block is in the first position, the positioning block abuts against the core. When the positioning block is in the second position, the surface of the positioning block facing the core forms the inner surface of the cylindrical cavity.

[0008] In a possible implementation manner, it further includes a driving assembly, and the driving assembly is used to drive the plurality of positioning blocks to synchronously switch between the first position and the second position.

[0009] In a possible implementation, a plurality of adjustment grooves parallel to the axial direction of the cylindrical cavity are provided inside the mold body, and the plurality of adjustment grooves are respectively communicated with a plurality of radial sliding grooves. A driving hole is provided on the sliding part. The driving assembly includes: a driving rod slidably arranged in the adjustment groove; a wedge block arranged on the driving rod, the wedge block is slidably matched with the driving hole and is used to drive the positioning block to switch between a first position and a second position; a driving source, and the output end of the driving source is connected to a plurality of driving rods.

[0010] In a possible implementation, a sealing sink is provided at the end of the radial sliding groove. One side of the positioning part facing the core has a positioning surface with the same shape as the inner surface of the cylindrical cavity, and a boss structure is provided on the side of the positioning part away from the core; wherein, when the positioning block is in the second position, the boss structure is in sealing contact with the sealing sink, and the positioning surface is coplanar with the surface of the cylindrical cavity.

[0011] In a possible implementation, the radial sliding groove further includes a first sealing groove communicated with the sealing sink. A limiting ring is provided on the outer periphery of the sliding part. The core anti-deviation positioning device further includes: a first elastic sealing block sleeved on the outer periphery of the sliding part, one end of the first elastic sealing block abuts against the limiting ring, and the other end abuts against the inner wall of the first sealing groove.

[0012] In a possible implementation, an axial sliding groove is provided on the mold body, and the axial sliding groove is communicated with one end of the cylindrical cavity. The core anti-deviation positioning device further includes: a liquid blocking assembly including a sliding rod and a blocking block arranged at the end of the sliding rod. The sliding rod is slidably arranged in the axial sliding groove and is connected to the driving source; wherein, when the positioning block is in the first position, the blocking block extends into the cylindrical cavity and is located between the wax injection hole and the core; when the positioning block is in the second position, the blocking block is received in the axial sliding groove.

[0013] In a possible implementation, the surface of the blocking block facing the cylindrical cavity is a flat structure, and when the blocking block is received in the axial sliding groove, the flat structure is coplanar with the inner bottom wall of the cylindrical cavity.

[0014] In a possible implementation, the blocking block has an arc surface facing the wax injection hole, and the arc surface is used to disperse the wax liquid ejected from the wax injection hole.

[0015] In a possible implementation, a second sealing groove is provided at the end of the axial sliding groove facing the cylindrical cavity. The liquid blocking assembly further includes: a second elastic sealing block sleeved on the outer periphery of the sliding rod, one end of the second elastic sealing block abuts against the blocking block, and the other end abuts against the inner bottom wall of the second sealing groove.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a core anti - deviation positioning device for casting processing, which has the following beneficial effects: By arranging a plurality of positioning blocks evenly distributed circumferentially around the core, the positioning stability of the core is significantly improved. Compared with the prior art where positioning is only carried out at the end, the present invention realizes the all - around support for the core. When the wax liquid is injected into the mold cavity at high speed, even if an impact force is generated on the core, the plurality of positioning blocks can act together to offset the impact forces from different directions, effectively preventing the core from shifting in position. Especially for a core with a relatively large length, the positioning method of the present invention can effectively suppress the swaying of the middle part of the core, which is difficult to achieve in the existing end - positioning structure. Thereby improving the fixing effect on the core and ensuring the product precision of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. shows a schematic cross - sectional structure of a core anti - deviation positioning device for casting processing and a mold body provided by an embodiment of the present application when the positioning block is in the second position.

[0019] Figure 2 FIG. shows a schematic cross - sectional structure of a core anti - deviation positioning device for casting processing and a mold body provided by an embodiment of the present application when the positioning block is in the first position.

[0020] Figure 3 FIG. shows a schematic cross - sectional structure of a mold body provided by an embodiment of the present application.

[0021] Figure 4 FIG. shows a three - dimensional structure schematic diagram of a core anti - deviation positioning device for casting processing provided by an embodiment of the present application.

[0022] Figure 5 FIG. shows a top - view structure schematic diagram of a core anti - deviation positioning device for casting processing provided by an embodiment of the present application.

[0023] Figure 6 FIG. shows a three - dimensional structure schematic diagram of a positioning block and a driving assembly provided by an embodiment of the present application.

[0024] Figure 7 Shows Figure 6 A three - dimensional structure schematic diagram from another angle.

[0025] Figure 8 FIG. shows a three - dimensional structure schematic diagram of a liquid - blocking assembly provided by an embodiment of the present application.

[0026] Reference numerals in the drawings:

[0027] 1. Mold body; 11. Cylindrical cavity; 12. Radial chute; 121. Sealing sink; 122. First sealing groove; 13. Adjusting groove; 14. Axial chute; 15. Second sealing groove; 16. Wax injection hole;

[0028] 2. Positioning block; 21. Positioning part; 211. Positioning surface; 212. Boss structure; 22. Sliding part; 221. Driving hole; 222. Limiting ring;

[0029] 3. Core;

[0030] 4. Driving assembly; 41. Driving rod; 42. Wedge block; 43. Driving source;

[0031] 5. First elastic sealing block;

[0032] 6. Liquid blocking assembly; 61. Sliding rod; 62. Block; 621. Flat structure; 622. Arc surface; 63. Second elastic sealing block. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Please refer to Figures 1 to 8 , an embodiment of the present application provides a core anti-deviation positioning device for casting processing, which is applied to the mold body 1. The mold cavity of the mold body 1 includes a cylindrical cavity 11. The core anti-deviation positioning device includes: a plurality of positioning blocks 2. The plurality of positioning blocks 2 have positioning parts 21 located in the cylindrical cavity 11. The positioning parts 21 are arranged around the core 3 in the cylindrical cavity 11 and are respectively in contact with the outer peripheral surface of the core 3.

[0035] In the present invention, by providing a plurality of positioning blocks 2 and the positioning blocks 2 having positioning parts 21 located in the cylindrical cavity 11, all-round positioning control of the core 3 can be achieved. The positioning parts 21 of the plurality of positioning blocks 2 are evenly distributed circumferentially around the core 3 and are respectively in direct contact with the outer peripheral surface of the core 3, forming a complete positioning system. In actual application scenarios, when the wax liquid is injected into the mold cavity at high speed, a strong impact force will be generated on the core 3. This impact force is often uneven and easily causes the core 3 to shift in position. By simultaneously positioning and restraining the core 3 with a plurality of positioning blocks 2, the uneven force brought by the wax liquid impact can be effectively resisted, and the position stability of the core 3 during the wax injection process can be maintained.

[0036] In specific applications, such as when manufacturing the wax mold of a turbine blade, the positional accuracy of the core 3 directly affects the dimensional accuracy of the inner cavity of the final product. Traditional positioning methods often use end positioning or single-point support methods, and it is difficult to ensure the stability of the core 3 during high-speed wax injection. The present invention adopts a distribution method with multiple positioning blocks 2 arranged around, which can provide multi-point support and all-round constraint, significantly improving the positioning accuracy of the core 3. When the wax liquid is injected at high speed from the wax injection hole 16, even if the flow direction of the wax liquid changes, the core 3 can remain stable, which is of great significance for improving the quality and consistency of the wax mold.

[0037] In some embodiments, a plurality of radial chutes 12 communicating with the cylindrical cavity 11 are provided in the mold body 1. The radial chutes 12 extend along the radial direction of the cylindrical cavity 11. The positioning block 2 includes a sliding portion 22, and the sliding portion 22 is slidably disposed in the radial chute 12. Wherein, the positioning block 2 can be switched between a first position and a second position. When the positioning block 2 is in the first position, the positioning block 2 abuts against the core 3. When the positioning block 2 is in the second position, the surface of the positioning block 2 facing the core 3 forms the inner surface of the cylindrical cavity 11.

[0038] In the present invention, by providing a plurality of radial chutes 12 communicating with the cylindrical cavity 11 in the mold body 1 and enabling the sliding portion 22 of the positioning block 2 to slide in the radial chute 12, the precise switching function of the positioning block 2 between the first position and the second position is realized. The radial chute 12 extends along the radial direction of the cylindrical cavity 11, providing precise guidance for the positioning block 2, enabling the positioning block 2 to move only in the radial direction and avoiding displacement in other directions. When the positioning block 2 is in the first position, it abuts against the core 3 to realize the positioning function; when the positioning block 2 is in the second position, the surface of the positioning block 2 facing the core 3 forms the inner surface of the cylindrical cavity 11 to realize the forming function.

[0039] In actual application scenarios, such as when manufacturing the wax mold of an aero-engine blade, it is necessary to frequently replace the core 3 and perform positioning. Traditional positioning devices often require disassembling multiple parts to replace the core 3, which is cumbersome to operate and easily causes loss of positioning accuracy. The design of the two working positions of the positioning block 2 in the present invention enables the loading and unloading of the core 3 to be completed with only a simple switching action. When a new core 3 needs to be loaded, the positioning block 2 is moved to the second position. At this time, the positioning block 2 retracts to the cavity wall, providing sufficient space for the placement of the core 3. After the core 3 is placed, the positioning block 2 is moved to the first position, and the rapid positioning of the core 3 can be realized. This design greatly improves the production efficiency and ensures the repeated positioning accuracy.

[0040] In some embodiments, a driving assembly 4 is further included, and the driving assembly 4 is used to drive the plurality of positioning blocks 2 to synchronously switch between the first position and the second position.

[0041] In the present invention, by arranging the driving assembly 4 to drive the synchronous switching of a plurality of positioning blocks 2, the problem of unstable positioning of the core 3 caused by the asynchronous movement of the plurality of positioning blocks 2 is effectively solved. The driving assembly 4 is connected to all the positioning blocks 2. When the driving assembly 4 operates, it can drive all the positioning blocks 2 to perform the same movement simultaneously, ensuring the synchronism when the positioning blocks 2 switch between the first position and the second position.

[0042] In actual production, if the movements of the plurality of positioning blocks 2 are asynchronous, it will cause uneven stress on the core 3, resulting in the deviation of the position of the core 3. For example, when making the wax mold of a large turbine casing, the size of the core 3 is large. If there is a time difference in the movement of the positioning blocks 2, it is very easy to cause the core 3 to tilt or the position to deviate. The synchronous control achieved by the driving assembly 4 ensures that all the positioning blocks 2 contact or disengage from the core 3 simultaneously, avoiding the position deviation of the core 3 caused by asynchronous movement. This synchronous control mechanism not only improves the positioning accuracy but also extends the service life of the positioning blocks 2 because it avoids local wear caused by asynchronous movement.

[0043] In some embodiments, a plurality of adjustment grooves 13 parallel to the axial direction of the cylindrical cavity 11 are arranged inside the mold body 1. The plurality of adjustment grooves 13 are respectively communicated with the plurality of radial sliding grooves 12. A driving hole 221 is arranged on the sliding portion 22. The driving assembly 4 includes: a driving rod 41 slidably arranged in the adjustment groove 13; a wedge block 42 arranged on the driving rod 41. The wedge block 42 is slidably matched with the driving hole 221 and is used to drive the positioning block 2 to switch between the first position and the second position; a driving source 43, and the output end of the driving source 43 is connected to a plurality of driving rods 41.

[0044] In the present invention, by arranging the adjustment grooves 13 parallel to the axial direction of the cylindrical cavity 11 inside the mold body 1 and adopting a transmission structure in which the driving rod 41, the wedge block 42 and the driving hole 221 cooperate, the precise control of the positioning block 2 is realized. When the driving source 43 drives the driving rod 41 to move, the wedge block 42 on the driving rod 41 slides in the adjustment groove 13. The wedge block 42 and the driving hole 221 of the positioning block 2 form a wedge pair transmission, converting the axial movement into a radial movement, thereby pushing the positioning block 2 to move. The plurality of driving rods 41 are connected to the same driving source 43, ensuring the synchronism of the movement.

[0045] In specific applications, for example, when making the wax mold of a large gas turbine blade, the traditional direct drive method is prone to jamming or unsmooth movement. However, the wedge drive mechanism adopted in the present invention has a self-locking function. Even during the high-pressure wax injection process, the positioning block 2 will not shift in position. At the same time, the wedge drive has a large transmission ratio, which amplifies the driving force, so that even a driving source 43 with a small power can provide sufficient positioning force. This drive method not only has a compact structure but also has a smooth movement, effectively improving the reliability and service life of the equipment.

[0046] In some embodiments, a sealing sink 121 is provided at the end of the radial chute 12. One surface of the positioning portion 21 facing the core 3 has a positioning surface 211 that is consistent with the shape of the inner surface of the cylindrical cavity. A boss structure 212 is provided on the surface of the positioning portion 21 away from the core 3. Wherein, when the positioning block 2 is in the second position, the boss structure 212 is in sealing contact with the sealing sink 121, and the positioning surface 211 is coplanar with the surface of the cylindrical cavity.

[0047] In the present invention, by providing a sealing sink 121 at the end of the radial chute 12 and providing a corresponding boss structure 212 on the positioning block 2, a good sealing effect and an accurate positioning surface 211 are achieved. When the positioning block 2 is in the second position, the boss structure 212 is in precise fit with the sealing sink 121 to form a reliable seal. At the same time, the positioning surface 211 of the positioning block 2 is coplanar with the surface of the cylindrical cavity, ensuring the continuity of the cavity surface.

[0048] In actual application scenarios, such as when making the wax mold of precision castings, the sealing performance and surface quality of the cavity directly affect the product quality. The traditional sliding seal structure is prone to wax leakage, resulting in product defects. However, the design of the cooperation between the boss structure 212 and the sealing sink 121 adopted in the present invention not only provides a reliable seal but also ensures that the positioning block 2 can be accurately positioned when in the second position. When injecting wax, even under high-pressure conditions, there will be no problem of wax leakage. At the same time, the coplanar design of the positioning surface 211 and the cavity surface avoids steps or scratches on the product surface, improving the surface quality of the product.

[0049] In some embodiments, the radial chute 12 further includes a first sealing groove 122 communicating with the sealing sink 121. A limiting ring 222 is provided on the outer periphery of the sliding portion 22. The core anti-deviation positioning device further includes: a first elastic sealing block 5, sleeved on the outer periphery of the sliding portion 22. One end of the first elastic sealing block 5 abuts against the limiting ring 222, and the other end abuts against the inner wall of the first sealing groove 122.

[0050] In the present invention, a reliable dynamic sealing system is formed by providing a limiting ring 222 and a first elastic sealing block 5 on the outer periphery of the sliding part 22. One end of the first elastic sealing block 5 abuts against the limiting ring 222, and the other end abuts against the inner wall of the first sealing groove 122, maintaining a sealed state during the movement of the sliding part 22. The provision of the limiting ring 222 ensures that the pre-tightening force of the first elastic sealing block 5 is always maintained within an appropriate range.

[0051] In practical applications, for example, when making a wax mold of an aero-engine casing, the traditional sealing structure is prone to failure due to long-term use, resulting in wax leakage. However, the elastic sealing structure adopted in the present invention can maintain a good sealing effect even during repeated movements. The first elastic sealing block 5 can adapt to minor deviations of the sliding part 22 and maintain a continuous sealing pressure. The provision of the limiting ring 222 prevents the over-compression or displacement of the sealing block, extending the service life of the sealing block. This sealing structure not only improves the reliability of the equipment but also reduces the maintenance cost.

[0052] In some embodiments, an axial sliding groove 14 is provided on the mold body 1. The axial sliding groove 14 communicates with one end of the cylindrical cavity 11. The core anti-deviation positioning device further includes: a liquid-blocking assembly 6, including a sliding rod 61 and a block 62 provided at the end of the sliding rod 61. The sliding rod 61 is slidably disposed in the axial sliding groove 14 and is connected to the driving source 43. Wherein, when the positioning block 2 is in the first position, the block 62 extends into the cylindrical cavity 11 and is located between the wax injection hole 16 and the core 3; when the positioning block 2 is in the second position, the block 62 is received in the axial sliding groove 14.

[0053] In the present invention, by providing the liquid-blocking assembly 6, including the sliding rod 61 and the block 62, precise control of the wax injection process is achieved. When the positioning block 2 is in the first position, the block 62 extends into the cylindrical cavity 11 and is located between the wax injection hole 16 and the core 3, preventing the wax liquid from directly impacting the core 3; when the positioning block 2 is in the second position, the block 62 is received in the axial sliding groove 14, without affecting the product molding.

[0054] In actual production, for example, when making a wax mold of a large turbine blade, the wax liquid injected at high speed is likely to cause impact damage to the core 3. Traditional wax injection methods often lack measures to relieve the impact of the wax liquid. However, the liquid-blocking assembly 6 of the present invention can effectively disperse the impact force of the wax liquid and protect the core 3. Especially during high-pressure wax injection, the presence of the block 62 causes the wax liquid to form a circular flow, evenly filling the mold cavity and avoiding the displacement of the core 3 caused by local impact. This design not only improves the product quality but also extends the service life of the core 3.

[0055] In some embodiments, the surface of the stopper 62 facing the cylindrical cavity 11 is a planar structure 621. When the stopper 62 is received in the axial sliding groove 14, the planar structure 621 is coplanar with the inner bottom wall of the cylindrical cavity 11.

[0056] In the present invention, by providing the planar structure 621 on the stopper 62 and making it coplanar with the inner bottom wall of the cylindrical cavity 11, perfect molding of the bottom of the mold cavity is achieved. When the stopper 62 is received in the axial sliding groove 14, its planar structure 621 is completely coplanar with the inner bottom wall of the mold cavity, leaving no traces or steps on the surface of the product.

[0057] In a specific application scenario, such as when making a wax mold for a precision turbine mechanical part, the flatness of the bottom of the product directly affects the assembly accuracy. The traditional structure of the stopper 62 often leaves indentations or pits on the bottom of the product. However, the planar structure 621 design adopted in the present invention ensures perfect molding of the bottom of the product. When the stopper 62 is in the received position, the wax liquid can completely fill the bottom of the mold cavity, forming a flat surface. This design not only improves the product quality but also reduces the subsequent processing steps.

[0058] In some embodiments, the stopper 62 has a circular arc surface 622 facing the wax injection hole 16, and the circular arc surface 622 is used to disperse the wax liquid ejected from the wax injection hole 16.

[0059] In the present invention, by providing the circular arc surface 622 facing the wax injection hole 16 on the stopper 62, effective diversion of the wax liquid is achieved. When the high-speed wax liquid is injected, the circular arc surface 622 can change the flow direction of the wax liquid to flow along the wall surface of the mold cavity, avoiding direct impact on the core 3 and promoting uniform distribution of the wax liquid.

[0060] In practical applications, for example, when making a wax mold for a turbine blade with a complex inner cavity, traditional direct wax injection easily causes uneven distribution of the wax liquid, resulting in product defects. However, the circular arc surface 622 design of the present invention can enable the wax liquid to form an ideal flow state. When the wax liquid impacts the circular arc surface 622, its kinetic energy is dispersed in multiple directions, reducing the impact force on the core 3 and promoting uniform filling of the mold cavity. This design not only improves the internal quality of the product but also reduces damage to the core 3 caused by wax liquid impact.

[0061] In some embodiments, a second sealing groove 15 is provided at one end of the axial sliding groove 14 facing the cylindrical cavity 11. The liquid blocking assembly 6 further includes: a second elastic sealing block 63, the second elastic sealing block 63 is sleeved on the outer periphery of the sliding rod 61, one end of the second elastic sealing block 63 abuts against the stopper 62, and the other end abuts against the inner bottom wall of the second sealing groove 15.

[0062] In the present invention, by providing a second elastic sealing block 63 at the axial sliding groove 14 and enabling it to form a double-end seal with the stop block 62 and the sealing groove, reliable dynamic sealing is achieved. One end of the second elastic sealing block 63 abuts against the stop block 62, and the other end abuts against the inner bottom wall of the second sealing groove 15, maintaining a sealed state throughout the movement of the stop block 62.

[0063] In specific production, when making a wax mold of a large turbine casing, for example, the sealing performance at the axial sliding groove 14 directly affects the product quality. The traditional single-end sealing structure is prone to failure due to high-pressure wax injection. However, the double-end sealing design adopted in the present invention can maintain a good sealing effect even under high-pressure conditions. The second elastic sealing block 63 can adapt to the movement of the stop block 62, maintain a continuous sealing pressure, and effectively prevent the leakage of wax liquid. This sealing structure not only improves the reliability of the equipment, but also reduces the maintenance workload and extends the service life of the equipment.

[0064] It should be noted that the phrases such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, implementing such features, structures or characteristics in combination with other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0065] It should be easily understood that the terms "on", "above", and "over" in the present disclosure should be interpreted in the broadest manner, so that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above or over something", but may also include the meaning of "above or over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0066] In addition, for the convenience of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text may be interpreted accordingly.

[0067] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core anti-offset positioning device for casting processing, which is applied to a mold body (1). The mold cavity of the mold body (1) includes a cylindrical cavity (11), and is characterized in that, The core anti-deviation positioning device includes: a plurality of positioning blocks (2), and the plurality of positioning blocks (2) have positioning portions (21) located in the cylindrical cavity (11). The positioning portions (21) are arranged around the core (3) in the cylindrical cavity (11) and are respectively in contact with the outer peripheral surface of the core (3).

2. The core anti-offset positioning device according to claim 1, characterized in that, A plurality of radial sliding grooves (12) communicating with the cylindrical cavity (11) are provided in the mold body (1). The radial sliding grooves (12) extend along the radial direction of the cylindrical cavity (11). The positioning block (2) includes a sliding portion (22), and the sliding portion (22) is slidably arranged in the radial sliding groove (12). Wherein, the positioning block (2) can be switched between a first position and a second position. When the positioning block (2) is in the first position, the positioning block (2) is in contact with the core (3). When the positioning block (2) is in the second position, the surface of the positioning block (2) facing the core (3) forms the inner surface of the cylindrical cavity (11).

3. The core anti-deviation positioning device according to claim 1, characterized in that, It further includes a driving assembly (4), and the driving assembly (4) is used to drive the plurality of positioning blocks (2) to synchronously switch between the first position and the second position.

4. The core anti-deviation positioning device according to claim 2, wherein, A plurality of adjusting grooves (13) parallel to the axial direction of the cylindrical cavity (11) are provided inside the mold body (1). The plurality of adjusting grooves (13) communicate with the plurality of radial sliding grooves (12) respectively. A driving hole (221) is provided on the sliding portion (22), and the driving assembly (4) includes: A driving rod (41) slidably arranged in the adjusting groove (13); A wedge block (42) arranged on the driving rod (41). The wedge block (42) is slidably matched with the driving hole (221) and is used to drive the positioning block (2) to switch between the first position and the second position; A driving source (43), and the output end of the driving source (43) is connected to the plurality of driving rods (41).

5. The core anti-deviation positioning device according to claim 4, characterized in that, A sealing sink (121) is provided at the end of the radial sliding groove (12). The surface of the positioning portion (21) facing the core (3) has a positioning surface (211) with the same shape as the inner surface of the cylindrical cavity (11). A boss structure (212) is provided on the surface of the positioning portion (21) away from the core (3); Wherein, when the positioning block (2) is in the second position, the boss structure (212) is in sealing contact with the sealing sink (121), and the positioning surface (211) is coplanar with the surface of the cylindrical cavity.

6. The core anti-deviation positioning device according to claim 5, wherein, The radial sliding groove (12) further includes a first sealing groove (122) communicating with the sealing sink (121). A limiting ring (222) is provided on the outer periphery of the sliding portion (22). The core anti-deviation positioning device further includes: A first elastic sealing block (5) sleeved on the outer periphery of the sliding portion (22). One end of the first elastic sealing block (5) is in contact with the limiting ring (222), and the other end is in contact with the inner wall of the first sealing groove (122).

7. The core anti-offset positioning device according to claim 4, wherein An axial chute (14) is provided on the mold body (1), and the axial chute (14) communicates with one end of the cylindrical cavity (11). The core anti-deviation positioning device further includes: A liquid blocking assembly (6), including a sliding rod (61) and a blocking block (62) provided at the end of the sliding rod (61). The sliding rod (61) is slidably disposed in the axial chute (14) and is connected to the driving source (43); Wherein, when the positioning block (2) is in the first position, the blocking block (62) extends into the cylindrical cavity (11) and is located between the wax injection hole (16) and the core (3); when the positioning block (2) is in the second position, the blocking block (62) is received in the axial chute (14).

8. The core anti-deviation positioning device according to claim 7, characterized in that One surface of the blocking block (62) facing the cylindrical cavity (11) is a flat structure (621). When the blocking block (62) is received in the axial chute (14), the flat structure (621) is coplanar with the inner bottom wall of the cylindrical cavity (11).

9. The core anti-offset positioning device according to claim 7, wherein, The blocking block (62) has an arc surface (622) facing the wax injection hole, and the arc surface (622) is used to disperse the wax liquid ejected from the wax injection hole (16).

10. The core anti-offset positioning device according to claim 7, characterized in that, A second sealing groove (15) is provided at one end of the axial chute (14) facing the cylindrical cavity (11). The liquid blocking assembly (6) further includes: A second elastic sealing block (63). The second elastic sealing block (63) is sleeved on the outer periphery of the sliding rod (61). One end of the second elastic sealing block (63) abuts against the blocking block (62), and the other end abuts against the inner bottom wall of the second sealing groove (15).

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