Core repairing needle and core repairing device
By designing a core-repairing needle with an elastic element, the problem of positioning deviation and damage caused by rigid contact between the core-repairing needle and the sand core was solved, achieving precise burr removal and production continuity, and reducing maintenance costs.
Patent Information
- Application Number
- CN202511327495.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2025-12-16
AI Technical Summary
In existing core-repairing devices, the core-repairing needle is in rigid contact with the surface of the sand core, which leads to positioning deviation, incomplete burr removal, or damage to the core-repairing needle and the sand core, increasing maintenance costs and affecting production efficiency and continuity.
Design a core-repairing needle, including a connector and a needle body. The needle body is connected to the connector through a perforation. An elastic element is used to absorb lateral pressure, allowing the needle body to swing radially, ensuring that the core-repairing needle moves accurately to a preset position and absorbs impact, thus avoiding damage.
It achieves precise burr removal of the core-repairing needle, reduces equipment maintenance costs, ensures production efficiency and processing continuity, and avoids accidental damage to the core-repairing needle and sand core.
Smart Images
Figure CN121131679A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of core finishing technology, and in particular to a core finishing needle and a core finishing device. Background Technology
[0002] In the foundry industry, sand cores are important forming components, and their surface quality directly affects the forming accuracy and quality of the castings. However, after the sand cores are formed, burrs inevitably form on their surface. To prevent these burrs from affecting the forming accuracy and quality of the castings, the formed sand cores need to undergo burr removal.
[0003] As mentioned above, existing technologies generally use a core-repairing device to automatically remove burrs from sand cores. Specifically, the core-repairing device includes a core-repairing needle and a transfer module. The transfer module drives the core-repairing needle to move along the outer contour of the sand core, thereby scraping off the burrs.
[0004] However, in the existing technology, the core-repairing needle is in rigid contact with the surface of the sand core. Therefore, the core-repairing device needs to rely on a high-precision positioning system to ensure that the transfer module can drive the core-repairing needle to move accurately relative to the sand core to the preset position. When the core-repairing needle is in the preset position, it abuts against the side wall of the sand core. Thus, when the subsequent transfer module drives the core-repairing needle to move along the outer contour of the sand core, the core-repairing needle can accurately scrape off the burrs on the surface of the sand core.
[0005] However, due to factors such as machining and assembly errors, the positioning system inevitably experiences positioning deviations. This can lead to incomplete burr removal or improper contact pressure between the trimming needle and the sand core, resulting in damage to the trimming needle and / or the sand core. This increases equipment maintenance costs, causes production interruptions, and severely impacts production efficiency. Furthermore, during the movement of the trimming needle driven by the transfer module, if the trimming needle experiences an accidental collision, the rigid trimming needle is highly susceptible to bending or breakage, further increasing equipment maintenance costs and significantly affecting production efficiency and processing continuity.
[0006] Therefore, the above problems urgently need to be solved. Summary of the Invention
[0007] The purpose of this invention is to provide a core-repairing needle and a core-repairing device to ensure that the core-repairing needle can accurately and thoroughly scrape off the burrs on the surface of the sand core, while avoiding damage to the core-repairing needle and / or the sand core, thereby reducing device maintenance costs and ensuring production efficiency and processing continuity.
[0008] To achieve this objective, the present invention adopts the following technical solution:
[0009] This invention provides a core-repairing needle, comprising:
[0010] The connector has an internal cavity, and one end of the connector has a through hole that connects to the cavity. The diameter of the through hole gradually increases from the end that connects to the cavity to the end that moves away from the cavity.
[0011] The needle body has one end passing through the perforation and inserted into the cavity. An elastic element is installed in the cavity, and the elastic element abuts against the end of the needle body inserted into the cavity and the cavity wall.
[0012] Preferably, the connector includes a base and a sleeve, the sleeve is upside down on one end of the base and sleeved on the outer periphery of the base, the sleeve and the base form the cavity, and the perforation is provided on the sleeve.
[0013] Preferably, the sleeve is adjustable in position relative to the base along its axial direction.
[0014] Preferably, the sleeve is screwed onto the outer periphery of the base.
[0015] Preferably, the needle body includes a mounting platform and a needle bar, the needle bar is mounted on one end of the mounting platform, and a boss is provided on the other end of the mounting platform. The boss is inserted into the cavity, and the connector is stopped on the side of the boss facing the needle bar.
[0016] Preferably, the needle bar is fitted with an insert on its outer periphery, the insert is fitted into the mounting platform, and the needle body also includes a cover, the cover is snapped onto the end of the insert away from the mounting platform and fitted onto the outer periphery of the mounting platform, the cover is fixedly connected to the mounting platform.
[0017] Preferably, the mounting platform is provided with a groove, the cross-sectional area of which gradually increases from the side closer to the boss to the side farther away from the boss, and the cross-sectional area of the insert gradually decreases from the side farther away from the boss to the side closer to the boss. The mounting platform is fitted around the outer periphery of the insert through the groove.
[0018] Preferably, the elastic element is a spring.
[0019] In another aspect, the present invention provides a core-repairing device, including a transfer module and a core-repairing needle as described above, wherein the transfer module is configured to drive the core-repairing needle to move.
[0020] Preferably, the transfer module is a robotic arm.
[0021] The beneficial effects of this invention are:
[0022] In this invention, the needle body of the core-repairing needle can swing radially relative to the connector along the perforation, and the elastic element can undergo elastic deformation during the swinging process. Therefore, when the transfer module drives the core-repairing needle to move a preset stroke according to the positioning system settings, the drive end of the transfer module can continue to move closer to the sand core a preset distance, which is equal to the maximum positioning deviation of the positioning system. Based on this, this invention can ensure that the core-repairing needle can accurately move relative to the sand core to a preset position, thereby ensuring that when the transfer module subsequently drives the core-repairing needle to move along the outer contour of the sand core, the core-repairing needle can accurately and thoroughly scrape the burrs on the surface of the sand core. Moreover, during the process of the transfer module driving the core-repairing needle to move a preset stroke according to the positioning system settings, and the drive end of the transfer module continuing to move closer to the sand core a preset distance, this invention can counteract the excessive movement of the transfer module through the swinging of the needle body and absorb the lateral pressure on the core-repairing needle through the elastic element. This can avoid damage to the core-repairing needle and / or the sand core caused by improper contact pressure between the core-repairing needle and the sand core, thereby reducing equipment maintenance costs and ensuring production efficiency and processing continuity.
[0023] Furthermore, during the process of the transfer module driving the core-repairing needle to move, when the core-repairing needle is accidentally collided, the needle body can swing relative to the joint along the radial direction of the perforation. At the same time, the elastic element can absorb the impact on the core-repairing needle, thereby preventing the core-repairing needle from being damaged due to accidental collision, thus reducing the equipment maintenance cost and ensuring production efficiency and processing continuity. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the core-repairing needle in an embodiment of the present invention;
[0025] Figure 2 This is a cross-sectional view of the longitudinal section of the core-repairing needle along the needle shaft in an embodiment of the present invention.
[0026] In the picture:
[0027] 1. Connector; 11. Cavity; 12. Perforation; 13. Base; 14. Sleeve;
[0028] 2. Needle body; 21. Mounting platform; 211. Boss; 212. Groove; 22. Needle bar; 221. Insert; 23. Cap;
[0029] 3. Elastic components. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.
[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.
[0034] This embodiment provides a core-repairing device, which includes a transfer module and a core-repairing needle. The transfer module is configured to drive the core-repairing needle to move, thereby removing burrs from the sand core. Specifically, the transfer module first drives the core-repairing needle to move toward the sand core to a preset position. When the core-repairing needle is at the preset position, it abuts against the side wall of the sand core. Then, the transfer module drives the core-repairing needle to move along the outer contour of the sand core, thereby scraping off the burrs on the sand core.
[0035] It is worth noting that in this embodiment, the transfer module is a robotic arm, which can flexibly drive the core-repairing needle to move in multiple directions to meet the burr removal requirements of sand cores of different shapes.
[0036] Of course, in other alternative embodiments, the transfer module may also be a three-axis moving module or other module structure that can achieve linear or specific trajectory movement, as long as it can accurately drive the core-repairing needle to move along a preset path to complete the burr removal operation. This embodiment does not impose specific limitations on this.
[0037] Please see Figure 1 and Figure 2 In this embodiment, the core-repairing needle includes a connector 1 and a needle body 2. The connector 1 has a cavity 11 inside, and one end of the connector 1 has a through hole 12. The through hole 12 communicates with the cavity 11, and the diameter of the through hole 12 gradually increases from the end communicating with the cavity 11 to the end away from the cavity 11. That is, in this embodiment, one end of the connector 1 has a tapered hole.
[0038] It is understood that connector 1 is installed on the drive end of the transfer module. Specifically, in this embodiment, the end of connector 1 away from the through hole 12 is installed on the drive end of the transfer module.
[0039] The needle body 2 passes through the perforation 12 and is inserted into the cavity 11. An elastic element 3 is installed in the cavity 11, abutting between the end of the needle body 2 inserted into the cavity 11 and the cavity wall. Understandably, the core-repairing needle abuts against the side wall of the sand core via the needle body 2. Then, when the transfer module drives the core-repairing needle to move along the outer contour of the sand core, the needle body 2 can scrape off the burrs on the sand core.
[0040] Based on the above, in this embodiment, since the perforation 12 is conical and the diameter of the end of the perforation 12 that connects to the cavity 11 is smaller than the diameter of the end of the perforation 12 that is away from the cavity 11, there is a gap between the wall of the perforation 12 and the needle body 2 along the radial direction of the perforation 12. Therefore, the needle body 2 can swing relative to the connector 1 along the radial direction of the perforation 12. When the needle body 2 swings relative to the connector 1 due to pressure, the elastic element 3 can undergo elastic deformation, thereby absorbing the impact on the core-repairing needle. Moreover, the elastic element 3 can drive the needle body 2 to reset after the pressure on the needle body 2 is released.
[0041] Therefore, in this embodiment, if the transfer module drives the core-repairing needle to move a preset stroke according to the setting of the positioning system, the transfer module is over-driven due to positioning deviation, which causes the sand core to apply lateral pressure to it. Since the needle body 2 can swing relative to the connector 1 along the radial direction of the perforation 12, after the core-repairing needle moves to the preset position to abut against the sand core, the core-repairing needle will remain at the preset position and the movement of the transfer module will be counteracted by the swing of the needle body 2. At the same time, the elastic element 3 can absorb the lateral pressure on the core-repairing needle, thereby avoiding damage to the core-repairing needle and / or the sand core due to improper contact pressure between the core-repairing needle and the sand core.
[0042] Moreover, after the transfer module drives the core-repairing needle to move a preset distance according to the positioning system settings, the drive end of the transfer module can continue to move closer to the sand core by a preset distance. This preset distance is equal to the maximum positioning deviation value of the positioning system, thereby ensuring that the core-repairing needle can accurately move relative to the sand core to the preset position. This ensures that when the transfer module drives the core-repairing needle to move along the outer contour of the sand core, the core-repairing needle can accurately and thoroughly scrape off the burrs on the surface of the sand core.
[0043] Specifically, if the transfer module drives the core-repairing needle to move a preset stroke according to the positioning system settings, and the transfer module is over-driven due to positioning deviation, then when the drive end of the transfer module continues to move a preset distance closer to the sand core, the needle body 2 continues to swing radially relative to the connector 1 along the perforation 12, so that the core-repairing needle always remains in the preset position. At the same time, the elastic element 3 continues to undergo elastic deformation, thereby continuing to absorb the lateral pressure on the core-repairing needle, so as to prevent damage to the core-repairing needle and / or the sand core due to improper contact pressure between the core-repairing needle and the sand core.
[0044] If the transfer module drives the core-repairing needle to move a preset distance according to the positioning system's settings, and the core-repairing needle fails to move to the preset position due to positioning deviation, then if the distance between the core-repairing needle and the preset position is less than the maximum positioning deviation of the positioning system, the core-repairing needle can move to the preset position as the drive end of the transfer module continues to move closer to the sand core a preset distance. Afterward, the drive end of the transfer module continues to move, while the core-repairing needle remains at the preset position. The movement of the drive end of the transfer module is counteracted by the swinging of the needle body 2. Simultaneously, the elastic element 3 absorbs the lateral pressure on the core-repairing needle, thus preventing damage to the core-repairing needle and / or the sand core due to improper contact pressure. If the distance between the core-repairing needle and the preset position is equal to the maximum positioning deviation of the positioning system, then after the drive end of the transfer module continues to move closer to the sand core a preset distance, the transfer module can drive the core-repairing needle to continue moving closer to the sand core a preset distance, thus ensuring that the core-repairing needle moves exactly to the preset position.
[0045] Taking a positioning deviation of ±5mm as an example, the maximum positioning deviation is 5mm. That is, after the transfer module drives the core-repairing needle to move a preset stroke according to the setting of the positioning system, the drive end of the transfer module continues to move closer to the sand core by 5mm.
[0046] Based on the above, if the transfer module drives the core-repairing needle to move a preset stroke according to the positioning system settings, the transfer module will be over-driven due to positioning deviation. That is, after the core-repairing needle moves to the preset position, the drive end of the transfer module will continue to move a distance closer to the sand core. This distance is less than or equal to 5mm, which causes the sand core to apply lateral pressure to it. Since the needle body 2 can swing relative to the connector 1 along the radial direction of the perforation 12, after the core-repairing needle moves to the preset position to abut against the sand core, the core-repairing needle will remain at the preset position and the movement of the drive end of the transfer module will be counteracted by the swing of the needle body 2. At the same time, the elastic element 3 can absorb the lateral pressure on the core-repairing needle, thereby avoiding damage to the core-repairing needle and / or the sand core due to improper contact pressure between the core-repairing needle and the sand core. Furthermore, as the drive end of the subsequent transfer module continues to move a preset distance closer to the sand core, the needle body 2 continues to swing radially relative to the connector 1 along the perforation 12, thereby keeping the core-repairing needle always in the preset position. At the same time, the elastic element 3 continues to undergo elastic deformation, thereby continuing to absorb the lateral pressure on the core-repairing needle, so as to prevent damage to the core-repairing needle and / or the sand core due to improper contact pressure between the core-repairing needle and the sand core.
[0047] If the transfer module drives the core-repairing needle to move a preset distance according to the positioning system's settings, and the core-repairing needle fails to move to the preset position due to positioning deviation, then if the distance between the core-repairing needle and the preset position is less than the maximum positioning deviation of the positioning system (i.e., less than 5mm), the core-repairing needle can move to the preset position as the drive end of the transfer module continues to move closer to the sand core a preset distance. Afterward, the drive end of the transfer module continues to move, while the core-repairing needle remains at the preset position. The movement of the drive end of the transfer module is counteracted by the swinging of the needle body 2. Simultaneously, the elastic element 3 absorbs the lateral pressure on the core-repairing needle, thus preventing damage to the core-repairing needle and / or the sand core due to improper contact pressure. If the distance between the core-repairing needle and the preset position is equal to 5mm, then after the drive end of the transfer module continues to move closer to the sand core a preset distance, the transfer module can drive the core-repairing needle to continue moving closer to the sand core a preset distance, thus ensuring that the core-repairing needle moves exactly to the preset position.
[0048] In summary, in this embodiment, the needle body 2 of the core-repairing needle can swing relative to the connector 1 along the radial direction of the through hole 12, and the elastic element 3 can undergo elastic deformation during the swinging process. Therefore, when the transfer module drives the core-repairing needle to move a preset stroke according to the positioning system settings, the drive end of the transfer module can continue to move closer to the sand core a preset distance. This preset distance is equal to the maximum positioning deviation of the positioning system. Based on this, this embodiment can ensure that the core-repairing needle can accurately move relative to the sand core to the preset position, thereby ensuring that when the transfer module drives the core-repairing needle to move along the outer contour of the sand core, the core-repairing needle can accurately and thoroughly scrape off the burrs on the surface of the sand core. Moreover, during the process of the transfer module driving the core-repairing needle to move a preset stroke according to the positioning system settings, and the drive end of the transfer module continuing to move closer to the sand core a preset distance, this embodiment can offset the excessive movement of the transfer module by the swing of the needle body 2, and absorb the lateral pressure on the core-repairing needle by the elastic element 3. This can avoid damage to the core-repairing needle and / or the sand core caused by improper contact pressure between the core-repairing needle and the sand core, thereby reducing the equipment maintenance cost and ensuring production efficiency and processing continuity.
[0049] Furthermore, during the process of the transfer module driving the core-repairing needle to move, when the core-repairing needle is accidentally collided, the needle body 2 can swing relative to the connector 1 along the radial direction of the perforation 12. At the same time, the elastic element 3 can absorb the impact on the core-repairing needle, thereby preventing the core-repairing needle from being damaged due to accidental collision, thereby reducing the device maintenance cost and ensuring production efficiency and processing continuity.
[0050] For example, in this embodiment, the elastic element 3 is a spring. The spring abuts against one end of the needle body 2 inserted into the cavity 11 and the cavity wall of the cavity 11 away from the needle body 2. Thus, when the needle body 2 swings due to force, the spring can undergo elastic deformation, thereby absorbing the pressure on the core-repairing needle.
[0051] Furthermore, in this embodiment, the connector 1 includes a base 13 and a sleeve 14. The sleeve 14 is upside down on one end of the base 13 and is fitted around the outer periphery of the base 13. The sleeve 14 and the base 13 form a cavity 11, and a perforation 12 is provided on the sleeve 14. That is, the needle 2 passes through the sleeve 14 and is inserted into the interior of the connector 1.
[0052] It is understood that in this embodiment, the end of the base 13 away from the needle body 2 is installed on the drive end of the transfer module.
[0053] Based on the above, the position of the sleeve 14 relative to the base 13 along its axial direction is adjustable. Thus, this embodiment can adjust the preload of the spring when the needle body 2 is not swinging by adjusting the position of the sleeve 14 relative to the base 13 along its axial direction.
[0054] Specifically, the closer the sleeve 14 is to the end of the base 13 away from the needle body 2 along its axial direction, the greater the preload of the spring, and correspondingly, the greater the force required to drive the needle body 2 to swing. The further away the sleeve 14 is from the end of the base 13 away from the needle body 2 along its axial direction, the smaller the preload of the spring, and correspondingly, the smaller the force required to drive the needle body 2 to swing.
[0055] Therefore, for sand cores with thicker burrs, the spring preload is larger, ensuring that when the transfer module drives the core-repairing needle to move along the outer contour of the sand core, the needle body 2 can effectively scrape off the burrs on the surface of the sand core without swinging due to force. For sand cores with thinner burrs, the spring preload is smaller.
[0056] For example, in this embodiment, the sleeve 14 is screwed to the outer periphery of the base 13, thereby allowing the operator to quickly adjust the position of the sleeve 14 relative to the base 13 along its axial direction by turning the sleeve 14, which is easy to operate.
[0057] Furthermore, the needle body 2 includes a mounting platform 21 and a needle rod 22. The needle rod 22 is mounted on one end of the mounting platform 21 and is the part of the needle body 2 used to abut against the sand core. The other end of the mounting platform 21 is provided with a boss 211. The boss 211 is inserted into the cavity 11, and the connector 1 is stopped on the side of the boss 211 facing the needle rod 22, thereby preventing the connector 1 and the needle body 2 from separating.
[0058] In addition, an insert 221 is fitted around the outer periphery of the needle bar 22. The insert 221 is fitted into the mounting platform 21. The needle body 2 also includes a cover 23, which is upside down on the end of the insert 221 away from the mounting platform 21 and fitted around the outer periphery of the mounting platform 21. The cover 23 is fixedly connected to the mounting platform 21. Thus, in this embodiment, the position of the needle bar 22 can be fixed by the cooperation of the cover 23 and the mounting platform 21, thereby preventing the needle bar 22 from shaking during the deburring process and ensuring that the needle bar 22 can effectively deburr the surface of the sand core.
[0059] As described above, the mounting platform 21 is provided with a groove 212. The cross-sectional area of the groove 212 gradually increases from the side closer to the boss 211 to the side farther away from the boss 211, and the cross-sectional area of the insert 221 gradually decreases from the side farther away from the boss 211 to the side closer to the boss 211. The mounting platform 21 is fitted onto the outer periphery of the insert 221 through the groove 212. Thus, the mounting platform 21 and the cover 23 can more firmly fix the needle bar 22, thereby more effectively preventing the needle bar 22 from shaking during the burr removal process, and further ensuring that the needle bar 22 can effectively remove burrs from the surface of the sand core.
[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A core-repairing needle, characterized in that, include: The connector (1) has a cavity (11) inside, and one end of the connector (1) has a through hole (12) that connects to the cavity (11). The diameter of the through hole (12) gradually increases from the end that connects to the cavity (11) to the end that is away from the cavity (11). The needle body (2) has one end passing through the perforation (12) and inserted into the cavity (11). An elastic element (3) is installed in the cavity (11). The elastic element (3) abuts against the end of the needle body (2) inserted into the cavity (11) and the cavity wall of the cavity (11).
2. The core-repairing needle according to claim 1, characterized in that, The connector (1) includes a base (13) and a sleeve (14). The sleeve (14) is upside down on one end of the base (13) and sleeved on the outer periphery of the base (13). The sleeve (14) and the base (13) together form the cavity (11). The perforation (12) is provided on the sleeve (14).
3. The core-repairing needle according to claim 2, characterized in that, The sleeve (14) is adjustable in position relative to the base (13) along its axial direction.
4. The core-repairing needle according to claim 3, characterized in that, The sleeve (14) is screwed to the outer periphery of the base (13).
5. The core-repairing needle according to claim 1, characterized in that, The needle body (2) includes a mounting platform (21) and a needle bar (22). The needle bar (22) is mounted on one end of the mounting platform (21). The other end of the mounting platform (21) is provided with a boss (211). The boss (211) is inserted into the cavity (11), and the connector (1) is stopped on the side of the boss (211) facing the needle bar (22).
6. The core-repairing needle according to claim 5, characterized in that, The needle bar (22) is fitted with an insert (221) on its outer periphery. The insert (221) is fitted into the mounting platform (21). The needle body (2) also includes a cover (23). The cover (23) is snapped onto the end of the insert (221) away from the mounting platform (21) and fitted onto the outer periphery of the mounting platform (21). The cover (23) is fixedly connected to the mounting platform (21).
7. The core-repairing needle according to claim 6, characterized in that, The mounting platform (21) is provided with a groove (212). The cross-sectional area of the groove (212) gradually increases from the side closer to the boss (211) to the side farther away from the boss (211). The cross-sectional area of the insert (221) gradually decreases from the side farther away from the boss (211) to the side closer to the boss (211). The mounting platform (21) is fitted onto the outer periphery of the insert (221) through the groove (212).
8. The core-repairing needle according to claim 1, characterized in that, The elastic element (3) is a spring.
9. A core-repairing device, characterized in that, It includes a transfer module and a core-repairing needle as described in any one of claims 1-8, wherein the transfer module is configured to drive the core-repairing needle to move.
10. The core-repairing device according to claim 9, characterized in that, The transfer module is a robotic arm.