A root canal file grinding system

Abstract

This utility model relates to the field of grinding, specifically a root canal file grinding system. It includes a positioning fixture for positioning the tool, with at least one support platform for supporting the tool and a clearance groove adjacent to the support platform but lower in height. During grinding, at least one section of the tool supported by the support platform is ground to form the working head of the root canal file, while the section of the tool vertically corresponding to the clearance groove serves as the connecting rod of the root canal file and is suspended. The system also includes a conveying unit for linearly conveying the tool along its axis and a rotating unit for driving the tool to rotate around its axis during grinding. Either the conveying unit or the rotating unit can be used. This utility model ensures the overall rigidity of the tool support and avoids processing deformation while simultaneously preventing scratches caused by friction on the section where the root canal file connecting rod is located.

Description

Technical Field

[0001] This utility model relates to the field of grinding, specifically a root canal file grinding system. Background Technology

[0002] Root canal files are core instruments used in root canal treatment for cleaning and shaping root canals. They are primarily used for cleaning, shaping, and enlarging root canals. Their structure, as described in announcement number "CN209884369U", includes a connecting rod and a working head with helical blades. The connecting rod and working head of the root canal file must be integrally formed during manufacturing before being assembled onto the handle. Currently, the working head of root canal files is typically manufactured using a grinding process, where the working head of the file is precisely ground using a grinding tool to create the helical blades.

[0003] Current grinding processes first require a fully supported positioning of a cylindrical metal wire rod (such as nickel-titanium wire), then the rod is driven to rotate. During rotation, the grinding tool grinds the rod along a set trajectory. However, this fully supported positioning method has a problem: during grinding, only the working head section needs to be ground, while the connecting rod section does not. As the rod rotates, the connecting rod section rotates synchronously with the working head section, resulting in continuous friction with the rod's support surface and causing scratches on the connecting rod. These scratches not only affect aesthetics but also reduce the tightness of the fit with the handle during subsequent assembly, leading to handle loosening. Furthermore, the scratches themselves act as fatigue crack initiation points, reducing the fatigue life of the root canal file under reciprocating bending use. Reducing the support positioning length, however, cannot guarantee the overall support rigidity of the rod. Therefore, how to completely eliminate the sliding friction between the connecting rod and the tooling while ensuring the overall rigidity of the material bar and avoiding processing deformation, thereby eliminating scratches from the root, has become an urgent technical problem to be solved in the root canal file grinding process. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a root canal file grinding system. This utility model ensures the overall rigidity of the file bar and avoids processing deformation, while also preventing scratches caused by friction in the section where the root canal file connecting rod is located.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A root canal file grinding system includes a positioning fixture for positioning a rod. The positioning fixture has at least one support platform for supporting the positioning rod and a clearance groove arranged adjacent to the support platform and lower than the support platform. During grinding, at least one section of the rod supported by the support platform is ground to form the working head of the root canal file, and the section of the rod that is vertically corresponding to the clearance groove is suspended as the connecting rod of the root canal file. It also includes a conveying unit that linearly conveys the bar along the bar's axis and a rotating unit that drives the bar to rotate around the axis during grinding. Either the conveying unit or the rotating unit can be used.

[0006] As a further embodiment of this utility model, the positioning fixture also includes at least one set of guide platforms, and the guide platforms are provided with guide holes that are adapted to the diameter of the material bar so that the material bar can slide through.

[0007] As a further improvement of this utility model: the guide platform is provided in two sets, including a first guide platform and a second guide platform. The first guide platform and the second guide platform are respectively provided with a first guide hole and a second guide hole arranged coaxially. Along the material bar conveying direction, the first guide platform, the clearance groove, the support platform and the second guide platform are arranged in sequence.

[0008] As a further improvement of this utility model: the support platform is provided with a positioning groove arranged coaxially with the first guide hole and the second guide hole along the material bar conveying direction, and the positioning groove is adapted to the diameter of the material bar.

[0009] As a further embodiment of this utility model: the conveying unit includes at least two sets of drive rollers arranged radially along the bar, each drive roller clamping and positioning the bar, and the bar is driven to move in a straight line by friction when the drive rollers rotate.

[0010] As a further embodiment of this utility model: the rotating unit includes a hollow rotating shaft through which the feeding bar passes, and pneumatic grippers are evenly arranged radially on the rotating shaft, each pneumatic gripper clamping and positioning the feeding bar after opening and closing.

[0011] As a further embodiment of this utility model: the grinding unit for grinding the bar has at least two sets of travel paths, the first travel path of the grinding unit is along the bar conveying direction, and the second travel path of the grinding unit is along the vertical direction.

[0012] As a further embodiment of this utility model, it also includes a processing platform for fixing and positioning the fixture. The processing platform is installed on a linear guide rail arranged along the material bar conveying direction, and the positioning fixture can reciprocate linearly along the linear guide rail with the processing platform.

[0013] As a further improvement of this utility model: along the material bar conveying direction, a receiving platform located downstream of the positioning fixture is configured on the processing platform to receive the root canal file that has been processed, shaped and cut off.

[0014] As a further embodiment of this utility model, it also includes a storage mechanism that continuously feeds material bars to the conveying unit. The storage mechanism, the conveying unit, and the rotating unit are arranged sequentially along the material bar conveying direction.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The support platform of this utility model provides reliable support for the working head of the bar to be processed, suppresses the bending and vibration of the bar caused by the grinding force, and ensures the dimensional accuracy of the working head during processing. At the same time, the connecting rod part corresponding to the clearance groove is always in a non-contact suspended state during processing, ensuring the overall support rigidity of the bar and avoiding processing deformation, while also avoiding scratches caused by rotational friction of the connecting rod section of the root canal file.

[0016] 2. The double guide hole design of this utility model forms double end support for the processing section of the material bar, preventing bending caused by the long material bar during processing. At the same time, the support platform provides rigid support from bottom to top. Combined with the double end positioning, it further improves the processing accuracy of the root canal file. The positioning groove on the support platform matches the shape of the material bar, providing a larger support surface and avoiding local indentations caused by point contact or line contact.

[0017] 3. The control strategy of selectively using the conveying unit and the rotating unit of this utility model can adapt to the feeding requirements of different materials, and the switching between them can realize uninterrupted continuous processing of the material bar.

[0018] 4. The collaborative work of the material storage mechanism, conveying unit, rotating unit, movable processing platform and receiving platform of this utility model realizes the full-process automation from material feeding, positioning, grinding to finished product collection, and realizes the batch grinding processing of root canal files. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the positioning fixture in this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of a root canal file.

[0022] In the picture: 1. Positioning fixture; 11. First guide platform; 111. First guide hole; 12. Second guide platform; 121. Second guide hole; 13. Supporting platform; 131. Positioning groove; 14. Clearance groove; 2. Machining platform; 21. Linear guide rail; 22. Receiving table; 3. Grinding unit; 4. Rotating unit; 41. Pneumatic gripper; 5. Conveying unit; 6. Material bar; 7. Root canal file; 71. Connecting rod; 72. Working head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-3 In this embodiment of the utility model, a root canal file grinding system is provided. The root canal file 7 includes a connecting rod 71 and a working head 72 integrally formed with the connecting rod 71 and having a spiral blade. The connecting rod 71 is fixed on the handle.

[0025] The grinding system includes a storage mechanism, a conveying unit 5, a rotating unit 4, and a processing platform 2 arranged sequentially along the conveying direction of the bar 6. The arrangement order of the conveying unit 5 and the rotating unit 4 is adjustable. It also includes a grinding unit 3 for grinding the bar 6. The grinding unit 3 is independently set above the processing platform 2 and corresponds vertically to the positioning fixture 1 on the processing platform 2.

[0026] The material storage mechanism is used to continuously and automatically supply cylindrical material bars 6 to be processed to subsequent workstations. Its structure is not limited and existing conveying mechanisms can be used.

[0027] The conveying unit 5 includes at least two sets of drive rollers arranged radially opposite to each other along the material bar 6. The drive rollers clamp and position the material bar 6. When the drive rollers rotate under the drive of the motor, they drive the material bar 6 to move in a straight line through friction, thus achieving fixed-length feeding. In actual use, existing conveying methods such as double belt clamping or V-groove conveying can be used, and the specific conveying method is not limited.

[0028] During grinding, the rotating unit 4 drives the material bar 6 to rotate around its own axis. The rotating unit 4 includes an internally hollow rotating shaft for the material bar 6 to pass through. Multiple pneumatic grippers 41 are evenly arranged radially on the rotating shaft. During rotational processing, the pneumatic grippers 41 close, clamping and positioning the material bar 6. The rotating shaft is then driven by a motor, or by gears installed on the shaft body, with external gears meshing to drive the rotating shaft to rotate. Simultaneously, the material bar 6 rotates synchronously to cooperate with the grinding operation. After the grinding operation is completed, the pneumatic grippers 41 open, releasing the material bar 6. At this point, the rotating unit 4 stops working, and the conveying unit 5 resumes conveying the material bar 6 forward. In actual use, friction-driven rotation using friction wheels or magnetic force can also be employed; the specific method of driving the material bar 6 to rotate is not limited.

[0029] When circumferential grinding of the root canal file working head is required, the rotary unit 4 is activated; when axial feeding of the bar 6 is required, the feed unit 5 is activated. The grinding unit 3 has at least two sets of travel paths. The first travel path travels along the feed direction of the bar 6 and is used to machine the axial profile of the working head 72. The second travel path travels vertically and is used to control the grinding depth. The two travel directions, combined with the rotation of the bar 6, grind the desired helical cutting edge.

[0030] Positioning fixture 1 is installed on processing platform 2, providing stable support and positioning for the bar 6. Processing platform 2 is installed on linear guide rail 21, which is arranged along the conveying direction of bar 6. Processing platform 2 can drive positioning fixture 1 to reciprocate linearly along linear guide rail 21. After the grinding operation is completed and grinding unit 3 cuts the processed bar 6, linear guide rail 21 drives processing platform 2 to move linearly in the opposite direction to the bar 6. At this time, since bar 6 is still in a clamped state, the processed bar 6 is pushed out from positioning fixture 1 and falls into receiving table 22 on processing platform 2, after which processing platform 2 resets. At the same time, processing platform 2 can also adjust the relative position between positioning fixture 1 and grinding unit 3 by sliding, realizing fine-tuning of position. Driving processing platform 2 to slide linearly through linear guide rail 21 is the preferred solution. Processing platform 2 can also be fixed and pushed by conveying unit 5.

[0031] The specific structure of the positioning fixture 1 is as follows: Along the conveying direction of the bar 6, its surface is machined to form a first guide platform 11, a clearance groove 14, a support platform 13, and a second guide platform 12 arranged sequentially. The clearance groove 14, the support platform 13, and the second guide platform 12 are arranged in a stepped structure. The first guide platform 11 and the second guide platform 12 are respectively provided with a first guide hole 111 and a second guide hole 121 arranged coaxially. The dimensions of the two guide holes correspond to the outer diameter of the bar 6, forming a guide channel to ensure that the bar 6 maintains coaxial stability during conveying and rotation, preventing swaying or deformation due to excessive cantilever length.

[0032] The support platform 13 has an arc-shaped positioning groove 131 along the conveying direction of the bar 6. The positioning groove 131 is coaxial with the first guide hole 111 and the second guide hole 121, and the radius of the positioning groove 131 matches the radius of the bar 6. It is used to support and position the corresponding working head 72 of the bar 6 to be processed during grinding.

[0033] The clearance groove 14 is located between the first guide platform 11 and the support platform 13. Its height is lower than the upper surface of the support platform 13, forming a recessed area, in which a section of the feed rod 6 is suspended to serve as the connecting rod 71 area of ​​the root canal file 7.

[0034] During grinding, the conveying unit 5 delivers the material bar 6 to the predetermined position. At this time, one section of the material bar 6 corresponding to the working head 72 is supported by the positioning groove 131 of the supporting platform 13; while the section of the material bar 6 vertically corresponding to the clearance groove 14 is completely suspended in the air, corresponding to the connecting rod 71 area, and does not contact any components. Through the segmented support design, when grinding the working head 72, the lower part is supported by the positioning groove 131, which can withstand a large grinding force, ensuring processing accuracy and surface quality. At the same time, the connecting rod 71 area is suspended, avoiding scratches caused by friction. Meanwhile, the first guide platform 11 and the second guide platform 12 form two-end positioning of the processing section of the material bar 6. Through the combination of two-end positioning, support, and suspension, high-precision processing of the root canal file 7 is achieved.

[0035] The specific processing flow for this application is as follows: In the initial state, the pneumatic gripper 41 of the rotating unit 4 is released, and the drive roller of the conveying unit 5 clamps the material bar 6. The conveying unit 5 starts and conveys the material bar 6 in the storage mechanism forward, passing sequentially through the rotating unit 4, the first guide hole 111 of the first guide platform 11, above the clearance groove 14, and the positioning groove 131 of the support platform 13, until its front end reaches the second guide hole 121 of the second guide platform 12, completing the feeding and positioning.

[0036] When the conveying unit 5 stops driving, the rollers of the conveying unit 5 can remain in driven grip, the pneumatic gripper 41 of the rotating unit 4 closes, clamps the material bar 6, and drives the material bar 6 to rotate.

[0037] The grinding unit 3 starts, and the grinding cutter grinds the section of the bar 6 supported by the support platform 13 to form a working head 72. After grinding, the bar 6 is cut off from the section where the clearance groove 14 is located, and the grinding unit 3 retracts the cutter. The linear guide rail 21 drives the processing platform 2 to move in the opposite direction of the bar 6 until the cut bar 6 is pushed out from the outlet of the second guide hole 121 and falls into the receiving platform 22, and the processing platform 2 is reset. In this embodiment, the positioning fixture 1 is in a flat state, and the opening of the clearance groove 14 is horizontally upward. Based on this embodiment, this application also provides another embodiment in which the table surface of the processing platform 2 is arranged vertically. In this case, the positioning fixture 1 is in a side-mounted state, and the opening of the clearance groove 14 faces the horizontal direction. In this embodiment, the receiving platform 22 is set below the positioning fixture 1, and the bar 6 falls freely into the receiving platform 22 after being cut off.

[0038] Rotating unit 4 releases pneumatic gripper 41, and conveying unit 5 starts again, pushing material bar 6 forward again. The above steps are repeated to achieve continuous processing.

[0039] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0040] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A root canal file grinding system, characterized by, The device includes a positioning fixture (1) for positioning the rod (6), and the positioning fixture (1) is provided with at least one support platform (13) for supporting the positioning rod (6) and a relief groove (14) arranged adjacent to the support platform (13) and lower than the support platform (13); during grinding, at least one part of the rod (6) supported by the support platform (13) is ground to form the working head (72) of the root canal file (7), and the part of the rod (6) that is vertically corresponding to the relief groove (14) serves as the connecting rod (71) of the root canal file (7) and is in a suspended state; It also includes a conveying unit (5) for linearly conveying the bar (6) along the axis of the bar (6) and a rotating unit (4) for driving the bar (6) to rotate around the axis during grinding. The conveying unit (5) and the rotating unit (4) can be used selectively.

2. A root canal file grinding system according to claim 1, wherein The positioning fixture (1) also includes at least one set of guide platforms, on which guide holes adapted to the diameter of the bar (6) are provided for the bar (6) to slide through.

3. A root canal file grinding system according to claim 2, wherein The guide platform is provided in two sets, including a first guide platform (11) and a second guide platform (12). The first guide platform (11) and the second guide platform (12) are respectively provided with a first guide hole (111) and a second guide hole (121) arranged coaxially. Along the conveying direction of the bar (6), the first guide platform (11), the clearance groove (14), the support platform (13) and the second guide platform (12) are arranged in sequence.

4. A root canal file grinding system according to claim 3, wherein The support platform (13) is provided with a positioning groove (131) arranged coaxially with the first guide hole (111) and the second guide hole (121) along the conveying direction of the material bar (6). The positioning groove (131) is adapted to the diameter of the material bar (6).

5. A root canal file grinding system according to any one of claims 1 to 4, wherein The conveying unit (5) includes at least two sets of drive rollers arranged radially along the bar (6). Each drive roller clamps and positions the bar (6). When the drive rollers rotate, they drive the bar (6) to move in a straight line through friction.

6. A root canal file grinding system according to any one of claims 1 to 4, wherein The rotating unit (4) includes a hollow rotating shaft through which the feed bar (6) passes. Pneumatic grippers (41) are evenly arranged radially on the rotating shaft. Each pneumatic gripper (41) clamps and positions the feed bar (6) after opening and closing.

7. A root canal file grinding system according to any one of claims 1 to 4, characterized in that, The grinding unit (3) for grinding the bar (6) has at least two travel paths. The first travel path of the grinding unit (3) is along the conveying direction of the bar (6), and the second travel path of the grinding unit (3) is along the vertical direction.

8. A root canal file grinding system according to any one of claims 1 to 4, characterized in that, It also includes a processing platform (2) for fixing the positioning fixture (1). The processing platform (2) is installed on a linear guide (21) arranged along the conveying direction of the bar (6). The positioning fixture (1) can reciprocate linearly along the linear guide (21) with the processing platform (2).

9. A root canal file grinding system according to claim 8, wherein Along the conveying direction of the material bar (6), the processing platform (2) is equipped with a receiving platform (22) located at the downstream end of the positioning fixture (1) to receive the root canal file (7) that has been processed and cut off.

10. A root canal file grinding system according to any one of claims 1 to 4, wherein It also includes a storage mechanism that continuously feeds the material bar (6) to the conveying unit (5). The storage mechanism, the conveying unit (5), and the rotating unit (4) are arranged in sequence along the conveying direction of the material bar (6).

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