A boring tool

Abstract

The application relates to the technical field of bushing cutters, in particular to a bushing cutter which comprises a main body and a reinforcing ring, wherein the main body comprises a seat body, two cutter seats are oppositely arranged on the seat body, and at least one blade is assembled on each cutter seat; the reinforcing ring is movably arranged on the outer wall surface of the cutter seat through a connecting assembly, or the reinforcing ring is fixedly arranged on the outer wall surface of the cutter seat. The reinforcing ring is connected to the outer wall surface of the cutter seat, can provide a supporting force for the cutter seat, can further connect the two cutter seats through the reinforcing ring, can increase the effective bearing section of the cutter, can enhance the structural strength of the whole, can effectively inhibit the vibration and deformation in the machining process, can further improve the size precision and surface smoothness of the machined hole system, and can prolong the service life of the cutter.

Description

Technical Field

[0001] This application relates to the field of boring tool technology, and in particular to a boring tool. Background Technology

[0002] In the field of metal cutting, boring tools, due to their machining structure where the workpiece passes through the tool body, require sufficient chip removal channels to ensure smooth chip discharge and prevent chip accumulation that could lead to tool wear or machining interference. However, this structural design reduces the effective load-bearing cross-section of the tool body, resulting in limited overall structural rigidity. This insufficient rigidity is particularly pronounced when machining deep-hole workpieces, easily causing cutting vibration and tool deformation. Consequently, this can lead to workpiece dimensional inaccuracies and form and position tolerances exceeding acceptable limits, and may also cause surface defects such as chatter marks or excessive surface roughness. Utility Model Content

[0003] To address the aforementioned problems, this application provides a boring tool.

[0004] To achieve the above objectives, this application adopts the following technical solution: According to one aspect of this application, a boring tool is provided, comprising a body and a reinforcing ring, wherein: The main body includes a base, on which two tool holders are arranged opposite each other, and each tool holder is equipped with at least one blade; The reinforcing ring is movably disposed on the outer wall surface of the tool holder via a connecting assembly, or the reinforcing ring is fixedly disposed on the outer wall surface of the tool holder.

[0005] In one embodiment, the connecting assembly includes a first connecting portion and a second connecting portion that are threaded together. The first connecting portion is disposed on the outer wall surface of the seat, and the second connecting portion is disposed on the inner wall surface of the reinforcing ring. The reinforcing ring is threadedly connected to the seat through the connecting assembly.

[0006] In one embodiment, the tool holder has a recessed mounting groove along the radial direction of the main body, and the first connecting portion is disposed at the bottom of the recessed mounting groove.

[0007] In one embodiment, the recessed mounting groove has an L-shaped cross-section and is formed by a connected bottom surface and a side surface. The side of the bottom surface away from the seat is connected to the side surface, and the first connecting part is disposed on the bottom surface.

[0008] In one embodiment, the side of the reinforcing ring away from the seat is an annular end face, and when the first connecting part and the second connecting part are threaded together and locked, the annular end face abuts against the side.

[0009] In one embodiment, the axial length of the reinforcing ring is 0.3 to 0.65 times the axial length of the tool holder on the base body.

[0010] In one embodiment, a blade holder is provided on the inner side of the blade holder, the blade is detachably mounted on the blade holder, and an adjusting member is provided on the blade holder. The adjusting member passes through the blade holder along the radial thread of the base body and is connected to the blade holder to adjust the position of the blade in the radial direction of the blade holder. The reinforcing ring and the adjusting member are axially offset from each other in the seat body, or, the reinforcing ring and the adjusting member are provided with a clearance hole at their alignment.

[0011] In one embodiment, the outer diameter of the reinforcing ring is equal to or greater than the diameter of the outer wall surface of the tool holder.

[0012] In one embodiment, the reinforcing ring is provided with an operating part to apply a rotational force to the reinforcing ring through the operating part.

[0013] In one embodiment, at least two operating parts are provided, and each operating part is evenly spaced around the reinforcing ring. Each operating part includes an operating arm or an operating through hole.

[0014] According to the embodiments of this application, the boring tool is connected to the outer wall of the tool holder via a reinforcing ring, which provides support for the tool holder. Furthermore, the reinforcing ring can further connect two tool holders, thereby increasing the effective load-bearing cross-section of the tool, enhancing the overall structural strength, effectively suppressing vibration and deformation during machining, and thus improving the dimensional accuracy and surface finish of the machined hole system, and extending the tool's service life. In addition, the annular hollow structure of the reinforcing ring also ensures effective chip removal during machining. Attached Figure Description

[0015] Figure 1 This illustration shows a structural schematic diagram of a boring tool provided in an embodiment of this application; Figure 2 This illustration shows a front view of a boring tool provided in an embodiment of this application; Figure 3 This illustration shows a structural diagram of the main body of a boring tool according to an embodiment of this application; Figure 4 This illustration shows a structural schematic of a reinforcing ring in a boring tool according to an embodiment of this application.

[0016] Explanation of reference numerals in the attached figures: 1. Main body; 11. Base; 12. Tool holder; 13. Tool; 14. Recessed mounting groove; 15. Bottom surface; 16. Side surface; 17. Tool holder; 18. Adjusting component; 19. Adjusting hole; 2. Reinforcing ring; 21. Annular end face; 22. Operating part; 3. Connecting component; 31. First connecting part; 32. Second connecting part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They 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, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figures 1-4 As shown, this embodiment provides a boring tool, including a main body 1 and a reinforcing ring 2. The main body 1 includes a base 11, on which two tool holders 12 are arranged opposite to each other. At least one cutting tool 13 is mounted on the tool holder 12. The reinforcing ring 2 is movably disposed on the outer wall surface of the tool holder 12 through a connecting component 3, or the reinforcing ring 2 is fixedly disposed on the outer wall surface of the tool holder 12.

[0022] By connecting the reinforcing ring 2 to the outer wall of the tool holder 12, a supporting force can be provided for the tool holder 12. In addition, the reinforcing ring 2 can further connect two tool holders 12, thereby increasing the effective load-bearing cross section of the tool, enhancing the overall structural strength, effectively suppressing vibration and deformation during machining, thereby improving the dimensional accuracy and surface finish of the machined hole system, and extending the tool life. Furthermore, the annular hollow structure of the reinforcing ring 2 can also ensure chip removal during machining.

[0023] The outer wall surface of the tool holder 12 is the outer circumferential cylindrical surface of the tool holder 12.

[0024] The reinforcing ring 2 can be fixedly mounted on the tool holder 12 using methods such as welding, bonding, or interference fit. Alternatively, the reinforcing ring 2 can also be movably mounted on the tool holder 12 via a connecting assembly 3. The connecting assembly 3 includes structures such as threaded connections, snap-fit ​​structures, or locking mechanisms. The snap-fit ​​structure connects the reinforcing ring 2 and the tool holder 12 via a detachable snap-fit. During installation, the snap of the reinforcing ring 2 is aligned with the axial inlet of the tool holder 12's track, pushed axially in, and then rotated a small angle to allow the snap to slide into the bottom of the track's locking groove, achieving mechanical interlocking. Of course, the connecting assembly 3 can also employ any other existing structure capable of movable connection; this embodiment will not elaborate on these details.

[0025] In this embodiment, the connecting component 3 adopts a threaded connection structure. The connecting component 3 includes a first connecting part 31 and a second connecting part 32 with threaded connection. The first connecting part 31 is disposed on the outer wall surface of the base 11, and the second connecting part 32 is disposed on the inner wall surface of the reinforcing ring 2. The reinforcing ring 2 is threadedly connected to the base 11 through the connecting component 3. The threaded connection method is simple and reliable in structure, convenient for disassembly and assembly, and the preload force of the connection can be generated by tightening the thread, so that the reinforcing ring 2 and the tool holder 12 fit tightly together, effectively enhancing the rigidity of the boring tool.

[0026] Optionally, the number of cutting inserts 13 on each tool holder 12 can be adapted to different cutting requirements, and the cutting inserts 13 on each tool holder 12 are mutually corresponding to achieve the cutting function. The specific layout and arrangement of each cutting insert 13 can be the same as the design of existing boring tools, or adjusted according to special requirements, which is not limited in this embodiment.

[0027] Optionally, the reinforcing ring 2 is made of high-strength metal to ensure its structural strength and wear resistance when locked and fixed with the seat 11. The high-strength metal includes high-strength structural steel or titanium alloy, and the high-strength structural steel includes Q355, Q390, Q420 or Q460 series.

[0028] like Figures 1-4 As shown, in some embodiments, the tool holder 12 has a recessed mounting groove 14 radially formed along the main body 1, and the first connecting portion 31 is disposed at the bottom of the recessed mounting groove 14. The recessed mounting groove 14 provides a receiving space for the reinforcing ring 2, allowing the reinforcing ring 2 to be embedded in the recessed mounting groove 14 after installation, ensuring the overall radial dimension of the boring tool, avoiding interference with the fixture or other components during machining, and making the structure more compact.

[0029] Of course, in some embodiments, the outer diameter of the reinforcing ring 2 can be equal to or greater than the diameter of the outer wall surface of the tool holder 12. When the outer diameter of the reinforcing ring 2 is equal to the outer diameter of the tool holder 12, the overall appearance of the boring tool is smooth and flat, reducing the possibility of chip accumulation, while also ensuring the overall dimensions. When the outer diameter of the reinforcing ring 2 is greater than the outer diameter of the tool holder 12, the reinforcing ring 2 can not only improve the connection strength, but also act as a protective sleeve, preferentially contacting the tool when it approaches the fixture or other components, thereby preventing the tool holder 12 from being damaged by impacts, thus playing a protective role.

[0030] Furthermore, the recessed mounting groove 14 has an L-shaped cross-section. The recessed mounting groove 14 is formed by a connected bottom surface 15 and side surface 16. The side of the bottom surface 15 away from the seat 11 is connected to the side surface 16, and the first connecting part 31 is disposed on the bottom surface 15. The L-shaped bottom surface 15 provides an installation position for the threaded connection, while the side surface 16 can serve as an axial stop surface for the end face of the reinforcing ring 2, resulting in a more uniform stress distribution, avoiding stress concentration, and improving the fatigue strength of the connection. In addition, the L-shaped cross-section facilitates the connection and disassembly of the reinforcing ring 2, making it convenient for use and replacement.

[0031] In some embodiments, the side of the reinforcing ring 2 away from the base 11 is an annular end face 21. When the first connecting part 31 and the second connecting part 32 are threaded together and locked, the annular end face 21 abuts against the side surface 16. The abutting fit between the annular end face 21 and the side surface 16 forms an axial locking mechanism. When the thread is tightened, the annular end face 21 of the reinforcing ring 2 presses tightly against the side surface 16 of the L-shaped groove, which not only effectively prevents the reinforcing ring 2 from loosening under vibration, but also limits the slight axial deformation of the tool holder 12, further improving structural stability.

[0032] In some embodiments, the axial length of the reinforcing ring 2 is 0.3 to 0.65 times the axial length of the tool holder 12 on the base 11. That is, the axial length of the reinforcing ring 2 can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, or 0.65 times the axial length of the tool holder 12 on the base 11. By limiting the axial length of the reinforcing ring 2, it is ensured that the reinforcing ring 2 can connect to and cover the main stress area of ​​the tool holder 12, providing sufficient support length to effectively improve rigidity, while avoiding material waste and unnecessary weight increase, achieving a balance between performance and cost. Furthermore, it ensures that the setting of the reinforcing ring 2 does not affect the chip removal space of the boring tool, ensuring smooth chip removal.

[0033] In some embodiments, a blade holder 17 is provided on the inner side of the blade holder 12, and a blade 13 is detachably connected to the blade holder 17. An adjusting member 18 is provided on the blade holder 12, and the adjusting member 18 is threaded through the blade holder 12 along the radial direction of the base 11 and connected to the blade holder 17 to adjust the position of the blade 13 in the radial direction of the blade holder 12. The reinforcing ring 2 and the adjusting member 18 are axially offset from each other in the base 11, or, the reinforcing ring 2 and the adjusting member 18 are provided with a clearance hole at their alignment. An adjusting hole 19 is provided on the blade holder 12 along the radial direction of the base 11, and the adjusting member 18 is threaded through the adjusting hole 19 and cooperates with the blade holder 17. This ensures that the reinforcing ring 2 will not affect or interfere with the normal operation of the adjusting member 18 after installation, allowing the operator to directly fine-tune the position of the blade 13 without disassembling the reinforcing ring 2, greatly improving the convenience and efficiency of tool use and achieving a balance between rigidity enhancement and ease of operation.

[0034] In some embodiments, the reinforcing ring 2 is provided with an operating part 22 to apply a rotational force to the reinforcing ring 2. The operating part 22 provides a force application point for the rotation of the reinforcing ring 2, making the operation of tightening or loosening the reinforcing ring 2 less strenuous, especially in space-constrained working conditions, which can greatly improve the efficiency of assembly and maintenance.

[0035] The operating part 22 is provided in at least two locations, and each operating part 22 is evenly distributed around the reinforcing ring 2 in the circumferential direction. Each operating part 22 includes an operating arm or an operating through hole. By providing multiple circumferentially evenly distributed operating parts 22, technicians can apply force symmetrically with tools such as wrenches or inserts, ensuring that the reinforcing ring 2 is subjected to uniform force during tightening, avoiding skewing or jamming, and ensuring smooth threaded connection and uniform distribution of preload.

[0036] like Figures 1-4As shown above, the boring tool provided in this embodiment, before boring, has its reinforcing ring 2 tightened, causing it to move axially along the main body 1 until the annular end face 21 abuts against the side surface 16 of the tool holder 12. During machining, the reinforcing ring 2 forms a tight constraint on the tool holder 12, greatly enhancing the structural rigidity of the tool holder 12, effectively suppressing machining vibration, and improving the machining accuracy and stability of deep hole boring; at the same time, the chip removal space inside the main body 1 is not occupied, ensuring smooth chip removal.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A boring tool, characterized in that, It includes a main body (1) and a reinforcing ring (2), wherein: The main body (1) includes a base (11), on which two blade holders (12) are arranged opposite to each other, and each blade holder (12) is equipped with at least one blade (13). The reinforcing ring (2) is movably disposed on the outer wall surface of the tool holder (12) via the connecting component (3), or the reinforcing ring (2) is fixedly disposed on the outer wall surface of the tool holder (12).

2. The boring tool according to claim 1, characterized in that, The connecting component (3) includes a first connecting part (31) and a second connecting part (32) with threaded engagement. The first connecting part (31) is disposed on the outer wall surface of the seat (11), and the second connecting part (32) is disposed on the inner wall surface of the reinforcing ring (2). The reinforcing ring (2) is threadedly connected to the seat (11) through the connecting component (3).

3. The boring tool according to claim 2, characterized in that, The tool holder (12) has a recessed mounting groove (14) along the radial direction of the main body (1), and the first connecting part (31) is disposed at the bottom of the recessed mounting groove (14).

4. The boring tool according to claim 3, characterized in that, The recessed mounting groove (14) has an L-shaped cross section. The recessed mounting groove (14) is formed by a bottom surface (15) and a side surface (16) that are connected together. The bottom surface (15) is connected to the side surface (16) on the side away from the seat (11). The first connecting part (31) is provided on the bottom surface (15).

5. The boring tool according to claim 4, characterized in that, The reinforcing ring (2) has an annular end face (21) on the side away from the seat (11). When the first connecting part (31) and the second connecting part (32) are threaded together and locked, the annular end face (21) abuts against the side surface (16).

6. The boring tool according to claim 1, characterized in that, The axial length of the reinforcing ring (2) is 0.3 to 0.65 times the axial length of the tool holder (12) on the seat body (11).

7. The boring tool according to claim 1, characterized in that, The inner side of the tool holder (12) is provided with a tool clip (17), and the blade (13) is detachably mounted on the tool clip (17). The tool holder (12) is provided with an adjusting member (18), which passes through the tool holder (12) along the radial thread of the base body (11) and is connected to the tool clip (17) to adjust the position of the blade (13) in the radial direction of the tool holder (12). The reinforcing ring (2) and the adjusting member (18) are axially offset from each other on the seat (11), or, the reinforcing ring (2) and the adjusting member (18) are provided with a clearance hole at their alignment.

8. The boring tool according to claim 3, characterized in that, The outer diameter of the reinforcing ring (2) is equal to or greater than the diameter of the outer wall surface of the tool holder (12).

9. The boring tool according to any one of claims 2-8, characterized in that, An operating part (22) is provided on the reinforcing ring (2) to apply a rotational force to the reinforcing ring (2) through the operating part (22).

10. The boring tool according to claim 9, characterized in that, The operation part (22) is provided in at least two, and each operation part (22) is evenly distributed in the circumferential direction of the reinforcing ring (2). The operation part (22) includes an operation arm or an operation through hole.

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