A diamond composite cutting tool
By designing movable limiting posts and retaining components, the problem of cumbersome disassembly of traditional diamond composite cutting tools is solved, achieving a stable connection and easy disassembly between the cutting head and the tool holder, improving machining accuracy and lifespan, and reducing replacement costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN SUIHANG TECHNOLOGY CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional diamond composite cutting tools are difficult to disassemble, resulting in high replacement costs and material waste.
The design employs a movable limiting post and a retaining component. Through the cooperation of the limiting hole and the docking hole, a reliable connection and easy disassembly of the cutter head and the cutter shank are achieved. The position of the limiting post can be adjusted by the retaining component in different states to ensure stable connection of the cutter head during processing and easy disassembly.
It improves machining accuracy and tool life, reduces material waste, lowers replacement costs, and is simple and convenient to operate.
Smart Images
Figure CN224275634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining tool technology, and in particular, to a diamond composite cutting tool. Background Technology
[0002] In the field of high-precision machining, diamond composite cutting tools are widely used due to their excellent hardness and wear resistance. A diamond composite cutting tool typically consists of a cutting head and a shank. The cutting head is equipped with diamond cutting edges for actual cutting or slitting operations, while the shank is used to fix the cutting head to the machining equipment.
[0003] Since the cutting head is a consumable part, it is usually replaced after a period of use or after it is damaged. In order to reduce the cost waste during replacement, the cutting head and the cutting shank are usually designed to be detachable. However, the traditional cutting head and cutting shank are relatively troublesome to disassemble. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a diamond composite cutting tool.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A diamond composite cutting tool includes: a cutting head with a diamond cutting edge mounted at its lower end and a connecting section at its upper end, the connecting section having a limiting hole on its peripheral wall; a cutting shank with a mating hole at its lower end that is adapted to fit the connecting section and allows the connecting section to be inserted to achieve torque transmission, the mating hole having a movable hole aligned with the limiting hole on its peripheral wall; a movable limiting post having a first limiting state and a first avoidance state, slidably mounted in the movable hole to switch between the first limiting state and the first avoidance state; the movable limiting post in the first limiting state is partially embedded in the corresponding limiting hole; the movable limiting post in the first avoidance state is disengaged from the limiting hole and can avoid the movement path of the connecting section being pulled out of the mating hole; and a retaining member connected to the cutting shank for limiting the movable limiting post in the first limiting state, so that the movable limiting post remains in the first limiting state.
[0007] Furthermore, the lower end of the tool holder is provided with an external threaded rod, and the retaining member is threadedly connected to the external threaded rod.
[0008] Furthermore, the retaining member has a second limiting state and a disassembly state. In the second limiting state, the retaining member limits the movable limiting post in the first limiting state, so that the movable limiting post is kept in the first limiting state. In the disassembly state, the retaining member can avoid the movement path of the movable limiting post disengaging from the limiting hole and the movable hole.
[0009] Furthermore, the retaining member also has a semi-limited state. The retaining member in the semi-limited state can avoid the movement path of the movable limiting post leaving the limiting hole and limit the movement of the movable limiting post leaving the movable hole, so that the movable limiting post is at least partially inside the movable hole.
[0010] Furthermore, the center of the retaining member is provided with a threaded hole, a tapered hole and a round hole arranged sequentially from top to bottom. The lower end of the tapered hole is flared. The movable limiting post is limited by the inner wall of the round hole of the retaining member in a semi-limited state, so that the movable limiting post cannot be disengaged from the movable hole.
[0011] Furthermore, a preload nut is threaded onto the external threaded rod, and the preload nut abuts against the upper end of the retaining member.
[0012] Furthermore, the upper end of the tool holder is provided with a rod body, the diameter of which is larger than that of the external thread rod, and a tool relief groove is provided between the rod body and the external thread rod; in the semi-limited state, the upper end of the preload nut is flush with the lower end wall of the tool relief groove; in the disassembly state, the upper end of the preload nut is in contact with the upper end wall of the tool relief groove.
[0013] Furthermore, the cross-sectional profiles of the connecting segment and the mating hole are regular polygons.
[0014] Furthermore, the movable hole, the limiting hole, and the movable limiting post are arranged in a circular pattern.
[0015] Furthermore, a shoulder is formed at the lower end of the connecting section, and when the lower end of the tool holder is in contact with the shoulder, the limiting hole is aligned with the movable hole.
[0016] This utility model has the following beneficial effects:
[0017] The cutting head engages with the tool shank via a connecting section and a mating hole, ensuring proper positioning and connection. A movable limiting post ensures a reliable connection between the cutting head and the tool shank. In the first limiting state, the movable limiting post is partially embedded in the limiting hole of the connecting section, ensuring the cutting head will not loosen during machining, thus improving machining accuracy and tool life. A retaining element further enhances the stability of the movable limiting post, preventing it from accidentally sliding to the first clearance state during machining, ensuring the cutting head remains in the correct position throughout extended working periods. When disassembly of the cutting head is required, the movable limiting post can switch to the first clearance state, completely disengaging from the limiting hole and avoiding the path of the connecting section's removal from the mating hole. This allows the connecting section of the cutting head to be directly removed from the tool shank's mating hole, enabling smooth disassembly without the need to remove fasteners, making operation simple and convenient.
[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0021] Figure 2 yes Figure 1 A schematic diagram of the decomposed state structure;
[0022] Figure 3 yes Figure 1 Internal sectional view;
[0023] Figure 4 yes Figure 3 Enlarged view of point A;
[0024] Figure 5 It is a partial cross-sectional view of the disassembled / assembled state;
[0025] Figure 6 This is a partial sectional view of the semi-limited state;
[0026] Figure 7 This is a partial cross-sectional view of another embodiment of the present invention.
[0027] Legend:
[0028] Cutting head 100, diamond cutting edge 110, connecting section 120, limiting hole 121, shoulder 130;
[0029] Tool holder 200, mating hole 210, movable hole 220, external threaded rod 230, rod body 240, tool relief groove 250;
[0030] Activity limit column 300;
[0031] Fixing element 400, threaded hole 410, tapered hole 420, round hole 430;
[0032] Preload nut 500. Detailed Implementation
[0033] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0034] 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.
[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0036] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0037] Please refer to Figure 1 and Figure 2 A preferred embodiment of the present invention provides a diamond composite cutting tool, comprising a cutting head 100, a cutting rod 200, a movable limiting post 300, and a retaining member 400.
[0038] The lower end of the cutting head 100 is equipped with a diamond cutting edge 110. The cutting head 100 is made of cemented carbide or high-speed steel, thus forming a composite material cutting tool. The lower end of the cutting head 100 can be provided with a mounting groove. The diamond cutting edge 110 is partially embedded in the mounting groove and partially protrudes from the mounting groove to achieve installation. The diamond cutting edge 110 can be reinforced by bonding (such as using an organic adhesive such as epoxy resin to bond the diamond cutting edge 110 to the cutting head 100) or brazing (such as using a specific brazing filler metal, such as a silver-based alloy with titanium as the active element, to weld the diamond cutting edge 110 to the cutting head 100 in a high vacuum environment).
[0039] The upper end of the cutter head 100 is provided with a connecting section 120, and the peripheral wall of the connecting section 120 is provided with a limiting hole 121.
[0040] The lower end of the tool holder 200 is provided with a mating hole 210 that is adapted to and allows the connecting section 120 to be inserted to achieve torque transmission. This avoids concentrating the torque transmission force on the movable limiting post 300. Torque transmission is achieved by inserting the connecting section 120 into the mating hole 210, thereby optimizing the torque transmission path. It can be understood that torque transmission can be achieved as long as the cross-sectional contours of the connecting section 120 and the mating hole 210 are not completely circular, such as polygonal contours or a combination of curves and straight lines. The peripheral wall of the mating hole 210 is provided with a movable hole 220 that is aligned with the limiting hole 121.
[0041] The movable limiting post 300 has a first limiting state and a first avoidance state. The movable limiting post 300 is slidably installed in the movable hole 220 to switch between the first limiting state and the first avoidance state. In the first limiting state, the movable limiting post 300 is partially embedded in the corresponding limiting hole 121, thereby realizing the alignment and connection of the cutter head 100 and the cutter bar 200, and fixing their positions. In the first avoidance state, the movable limiting post 300 disengages from the limiting hole 121 and can avoid the movement path of the connecting section 120 withdrawing from the docking hole 210. The movable limiting post 300 disengaging from the limiting hole 121 in the first avoidance state can release the limiting on the connecting section 120, and avoiding the movement path of the connecting section 120 withdrawing from the docking hole 210 allows the cutting head 100 and the cutter bar 200 to be disassembled.
[0042] The retaining member 400 is connected to the tool holder 200 and is used to limit the movable limiting post 300 in the first limiting state, so that the movable limiting post 300 is kept in the first limiting state, thereby ensuring that the movable limiting post 300 stably limits the connecting section 120, so that the tool head 100 and the tool holder 200 are stably connected in the working state.
[0043] The detachable design of this invention allows for quick replacement of the cutting head without replacing the entire tool. This not only reduces material waste but also lowers operating costs. The cutting head 100 engages with the tool holder 200 via the connecting section 120 and the mating hole 210, ensuring proper positioning and connection. The movable limiting post 300 ensures a reliable connection between the cutting head 100 and the tool holder 200. In the first limiting state, the movable limiting post 300 partially embeds into the limiting hole 121 of the connecting section 120, ensuring that the cutting head 100 will not loosen during machining, thereby improving machining accuracy and tool life. The retaining member 400 further enhances the stability of the movable limiting post 300, preventing it from accidentally sliding to the first clearance state during machining, thus ensuring that the cutting head 100 remains in the correct position throughout extended working periods. When the cutter head needs to be disassembled, the movable limit post 300 can switch to the first avoidance state, completely disengage from the limit hole 121, and avoid the movement path of the connecting section 120 pulling away from the docking hole 210, so that the connecting section 120 of the cutter head 100 can be directly pulled away from the docking hole 210 of the cutter bar 200, achieving smooth disassembly, and disassembly does not require disassembling the fasteners, making the operation simple and convenient.
[0044] Reference Figure 2 In some embodiments of this utility model, the lower end of the tool holder 200 is provided with an externally threaded rod 230, and the mating hole 210 extends upward from the lower end face of the externally threaded rod 230. The retaining member 400 is threadedly connected to the externally threaded rod 230, thereby enabling the retaining member 400 to move by screwing it in, thus limiting or releasing the movable limiting post 300 in the first limiting state. This is convenient to operate, as only the retaining member 400 needs to be screwed in, without the need to disassemble the retaining member 400, and it also facilitates the subsequent replacement of the tool head 100.
[0045] In a further embodiment of this utility model, the retaining member 400 has a second limiting state and a disassembly / assembly state. (Refer to...) Figure 4 The retaining member 400 in the second limiting state limits the movable limiting post 300 in the first limiting state, keeping the movable limiting post 300 in the first limiting state, that is, the movable limiting post 300 does not move outward from the range of motion of the limiting hole 121. (Refer to...) Figure 5 In the disassembly / assembly state, the retaining component 400 can avoid the movement path of the movable limiting post 300 disengaging from the limiting hole 121 and the movable hole 220. That is, after the retaining component 400 reaches the disassembly / assembly state, the movable limiting post 300 can not only be pulled out of the limiting hole 121, but also directly pulled out of the movable hole 220 to achieve disassembly. Of course, the reverse can also be achieved to achieve installation.
[0046] In a further embodiment of this utility model, referring to Figure 6The retaining member 400 also has a semi-limited state. In this semi-limited state, the retaining member 400 can avoid the movement path of the movable limiting post 300 disengaging from the limiting hole 121. That is, in the semi-limited state, the retaining member 400 will not interfere with or obstruct the movable limiting post 300 from disengaging from the limiting hole 121. The semi-limited state of the retaining member 400 limits the movement of the movable limiting post 300 away from the movable hole 220, ensuring that the movable limiting post 300 is at least partially within the movable hole 220. Specifically, when the movable limiting post 300 moves away from the limiting hole 121, it will be obstructed by the semi-limited state of the retaining member 400, preventing the movable limiting post 300 from completely disengaging from the movable hole 220. The movable limiting post 300 is at least partially located within the movable hole 220. This allows the retaining member 400 to be moved to a semi-limited state when only the cutter head 100 needs to be disassembled and the movable limiting post 300 does not need to be removed. Thus, even if the movable limiting post 300 disengages from the limiting hole 121 and the connecting section 120 can be pulled out of the docking hole 210, the movable limiting post 300 will still remain in the movable hole 220. There is no need to worry about the movable limiting post 300 disengaging from the movable hole 220. This makes it convenient to directly insert the movable limiting post 300 into the limiting hole 121 after reinstalling the new cutter head 100 without having to reinstall the movable limiting post 300, thus facilitating the disassembly and assembly of the cutter head 100.
[0047] Reference Figure 4 , Figure 5 and Figure 6 In a further embodiment of this utility model, the retaining member 400 has a threaded hole 410, a tapered hole 420, and a round hole 430 arranged sequentially from top to bottom at its center. The threaded hole 410, tapered hole 420, and round hole 430 are coaxially arranged. The lower end of the tapered hole 420 is flared. The upper end of the tapered hole 420 is connected to the threaded hole 410, and the lower end is connected to the round hole 430. The threaded hole 410 is threadedly connected to the external threaded rod 230. Figure 4 As shown, the retaining member 400 in the second limiting state limits the movable limiting post 300 in the first limiting state. The inner wall of the tapered hole 420 abuts against the outer end of the movable limiting post 300 in the first limiting state, thereby pressing the movable limiting post 300 tightly, so that the movable limiting post 300 in the first limiting state cannot disengage from the limiting hole 121. Figure 6 As shown, the movable limiting post 300 is limited by the inner wall of the circular hole 430 of the retaining member 400 in the half-limited state, preventing the movable limiting post 300 from disengaging from the movable hole 220. When the movable limiting post 300 needs to return to the first limiting state, simply rotate the retaining member 400 to the movable position. The conical hole 420 will gradually push the movable limiting post 300 inward and insert it into the limiting hole 121, achieving the first limiting state. Of course, to make this process smoother, rounded chamfers can be provided on both ends of the movable limiting post 300, such as... Figure 5As shown, the retaining member 400 in the disassembled state is higher than the movable limiting post 300, thus not restricting the horizontal movement of the movable limiting post 300, allowing the movable limiting post 300 to be completely disassembled or re-inserted into the movable hole 220 to achieve disassembly or installation.
[0048] like Figures 4 to 6 As shown, the limiting hole 121 is a round hole or a square hole. Of course, in some other embodiments, such as Figure 7 As shown, the top wall of the limiting hole 121 can be an inclined surface 122, and the inclined surface 122 is set outward and upward from the center of the connecting section 120. The movable limiting post 300 in the first limiting state abuts against the inclined surface 122, thereby locking the connecting section 120. Moreover, during disassembly, the connecting section 120 can be pulled downward, and the inclined surface 122 will push the movable limiting post 300 to move outward, so there is no need to operate the movable limiting post 300 to move outward, making disassembly more convenient.
[0049] Reference Figure 1 and Figure 2 In some embodiments of this utility model, a preload nut 500 is threaded onto the external thread rod 230. The preload nut 500 abuts against the upper end of the retaining member 400, thereby applying a downward preload force to the retaining member 400. The retaining member 400 is also less likely to rotate and loosen automatically, thus improving assembly stability.
[0050] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the upper end of the tool holder 200 is provided with a rod body 240, the diameter of the rod body 240 is larger than that of the external thread rod 230, and a tool relief groove 250 is provided between the rod body 240 and the external thread rod 230; in the semi-limited state, the upper end of the preload nut 500 is flush with the lower end wall of the tool relief groove 250, and the upper end of the retaining member 400 abuts against the preload nut 500; in the disassembly state, the upper end of the preload nut 500 is in contact with the upper end wall of the tool relief groove 250, and the upper end of the retaining member 400 abuts against the preload nut 500, thereby facilitating the operator to judge the state of the retaining member 400. Thus, when it is necessary to switch states, the preload nut 500 is first screwed to the corresponding position, and then the retaining member 400 is screwed until it abuts against the preload nut 500.
[0051] Reference Figure 2 In a further embodiment of this utility model, the cross-sectional profiles of the connecting segment 120 and the mating hole 210 are regular polygons, thereby enabling stable torque transmission.
[0052] Reference Figure 2 In a further embodiment of this utility model, the movable hole 220, the limiting hole 121 and the movable limiting post 300 are arranged around the central axis of the cutter head 100 and the cutter bar 200, thereby realizing multi-position limiting and improving limiting stability.
[0053] Reference Figure 2 and Figure 3 In a further embodiment of this utility model, a shoulder 130 is formed at the lower end of the connecting section 120. The diameter of the cutter head 100 at the lower end of the connecting section 120 is larger than that of the connecting section 120, thus forming the shoulder 130. When the lower end of the cutter bar 200 is in contact with the shoulder 130, the limiting hole 121 is aligned with the movable hole 220. Thus, during operation, the downward pressing force is transmitted to the shoulder 130 through the lower end of the cutter bar 200, reducing the force transmitted to the movable limiting post 300. When the tool is lifted, it basically does not perform any processing and is in an idle state. The force is small and the movable limiting post 300 can withstand it without easily damaging it.
[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A diamond composite cutting tool, characterized in that, include: The cutting head (100) has a diamond cutting edge (110) installed at the lower end and a connecting section (120) at the upper end. The connecting section (120) has a limiting hole (121) on its peripheral wall. The lower end of the tool holder (200) is provided with a mating hole (210) that is adapted to the connecting section (120) and allows the connecting section (120) to be embedded in so as to realize torque transmission. The peripheral wall of the mating hole (210) is provided with a movable hole (220) that is aligned with the limiting hole (121). The movable limiting post (300) has a first limiting state and a first avoidance state, and is slidably installed in the movable hole (220) to realize the switching between the first limiting state and the first avoidance state; the movable limiting post (300) in the first limiting state is partially embedded in the corresponding limiting hole (121); the movable limiting post (300) in the first avoidance state is disengaged from the limiting hole (121) and can avoid the movement path of the connecting section (120) pulling out of the docking hole (210); The retaining element (400), connected to the tool holder (200), is used to limit the movable limiting post (300) in the first limiting state, so that the movable limiting post (300) is kept in the first limiting state.
2. The diamond composite cutting tool according to claim 1, characterized in that, The lower end of the tool holder (200) is provided with an external thread rod (230), and the retaining member (400) is threadedly connected to the external thread rod (230).
3. The diamond composite cutting tool according to claim 2, characterized in that, The retaining member (400) has a second limiting state and a disassembly state. The retaining member (400) in the second limiting state limits the movable limiting post (300) in the first limiting state, so that the movable limiting post (300) remains in the first limiting state. The retaining member (400) in the disassembly state can avoid the movement path of the movable limiting post (300) disengaging from the limiting hole (121) and the movable hole (220).
4. The diamond composite cutting tool according to claim 3, characterized in that, The retaining member (400) also has a semi-limited state. The retaining member (400) in the semi-limited state can avoid the movement path of the movable limiting post (300) disengaging from the limiting hole (121) and limit the movement of the movable limiting post (300) disengaging from the movable hole (220), so that the movable limiting post (300) is at least partially within the movable hole (220).
5. The diamond composite cutting tool according to claim 4, characterized in that, The center of the retaining member (400) is provided with a threaded hole (410), a tapered hole (420) and a round hole (430) arranged sequentially from top to bottom. The lower end of the tapered hole (420) is flared. The movable limiting post (300) is limited by the inner wall of the round hole (430) of the retaining member (400) in a half-limited state, so that the movable limiting post (300) cannot be disengaged from the movable hole (220).
6. The diamond composite cutting tool according to claim 5, characterized in that, The external threaded rod (230) is threaded with a preload nut (500), which abuts against the upper end of the retaining member (400).
7. The diamond composite cutting tool according to claim 6, characterized in that, The upper end of the tool holder (200) is provided with a rod body (240), the diameter of the rod body (240) is larger than that of the external thread rod (230), and a tool relief groove (250) is provided between the rod body (240) and the external thread rod (230); in the semi-limited state, the upper end of the preload nut (500) is flush with the lower end wall of the tool relief groove (250); in the disassembly state, the upper end of the preload nut (500) is in contact with the upper end wall of the tool relief groove (250).
8. The diamond composite cutting tool according to claim 1, characterized in that, The cross-sectional profiles of the connecting segment (120) and the mating hole (210) are regular polygons.
9. The diamond composite cutting tool according to claim 1 or 8, characterized in that, The movable hole (220), the limiting hole (121), and the movable limiting post (300) are arranged in a circular arrangement.
10. The diamond composite cutting tool according to claim 1, characterized in that, The lower end of the connecting section (120) has a shoulder (130). When the lower end of the tool bar (200) is in contact with the shoulder (130), the limiting hole (121) is aligned with the movable hole (220).