Machining tool for long-distance complete set of lugs

Abstract

The utility model discloses a machining tool for a set of long-distance lug pieces, the set of lug pieces comprises at least two lug pieces arranged in parallel, each lug piece is provided with a lug piece hole, a plurality of lug piece holes are coaxial, the machining tool comprises a cutting edge, a receding section, a supporting section and a tool handle which are sequentially arranged from front to back, and when the thickness of a single lug piece is X, X is a positive integer, and X is a positive integer. When the distance between the two lugs is Y, the distance between the front end of the cutting edge and the front end of the supporting section is not larger than X + Y, and the distance between the front end of the cutting edge and the rear end of the supporting section is not smaller than X + Y. The multi-section supporting and dynamic centering functions are achieved, the problems of vibration and form and location tolerance in the deep and long hole machining process are solved through structural innovation, and high-coaxiality and high-precision one-time forming machining is achieved.

Description

Technical Field

[0001] This utility model relates to a machining tool for long-spacing sets of ear pieces, belonging to the field of machining tool technology. Background Technology

[0002] In the field of machining, when machining a set of precision holes on long, deep lugs that are far apart, the large overhang of the tool makes it prone to bending deformation due to its own weight and cutting forces, leading to hole center misalignment and making it difficult to guarantee the coaxiality requirements of the two holes. Simultaneously, the tool is prone to vibration under long overhang, which in turn affects the hole diameter accuracy and causes dimensional deviations. Traditional machining methods typically employ step-by-step drilling or reaming processes, but multiple clamping and tool changes introduce cumulative errors, failing to meet the requirements for high coaxiality precision holes.

[0003] Furthermore, when the distance between the lugs is large, the tool's support between the two holes is insufficient, further exacerbating deformation and vibration problems. In existing technologies, ordinary reamers or boring tools lack targeted support designs, making it difficult to provide effective stability to the previous hole when machining the next hole, resulting in unstable machining quality. Utility Model Content

[0004] The purpose of this utility model is to provide a machining tool for long-spacing sets of lugs, which has multi-segment support and dynamic centering functions. Through structural innovation, it solves the problems of vibration and geometric tolerance in deep and long hole machining, and achieves high coaxiality and high precision one-time forming machining.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A machining tool for a long-spacing set of lugs, the set of lugs comprising at least two parallel lugs, each lug having a lug hole, the lug holes being coaxial, the machining tool comprising a cutting edge, a clearance section, a support section, and a tool holder arranged sequentially from front to back, wherein when the thickness of a single lug is X and the spacing between two lugs is Y, the distance from the tip of the cutting edge to the tip of the support section is not greater than X+Y, and the distance from the tip of the cutting edge to the rear end of the support section is not less than X+Y.

[0007] Alternatively, the distance from the front end of the cutting edge to the front end of the support section is not greater than X, and the distance from the rear end of the cutting edge to the rear end of the support section is not less than 2X+Y.

[0008] Alternatively, the length of the cutting edge may be not less than X.

[0009] Alternatively, the cutting edge may be provided with a cutting edge guide section at its front end.

[0010] Alternatively, the cutting edge guide section can be 8-12°.

[0011] Alternatively, the cross-section of the avoidance section and the support section may be circular.

[0012] Alternatively, the cutting edge, clearance section, support section, and tool holder can be coaxial.

[0013] Alternatively, the diameter of the clearance section may be smaller than the cutting edge.

[0014] Alternatively, the rear end of the cutting edge may be provided with a retraction guide section.

[0015] Alternatively, the diameter of the support section is the diameter of the precision hole in the workpiece, with a tolerance of -0.02 to -0.05.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] 1. The present invention provides a machining tool for long-spacing lugs, which, by precisely controlling the relative position of the support section and the cutting edge, ensures that when the cutting edge begins to machine the lug hole, the support section can immediately enter the front lug hole to provide support, while ensuring that the support section still completely covers the front hole when the cutting edge finishes machining. This effectively suppresses deformation and vibration caused by tool overhang during long-spacing machining and significantly improves the coaxiality accuracy of multi-hole machining.

[0018] 2. The tool provided by this utility model for machining long-spacing lugs achieves impact-free entry and smooth exit through the cutting edge guide section and the retraction guide section. The circular cross-section avoidance section and support section, combined with the precise diameter tolerance, form a balance between flexible avoidance and rigid support. The strict coaxiality of each functional section ensures consistent force flow transmission. With the optimized geometric parameter layout, it perfectly solves the problem of maintaining coaxiality in the machining of long-spacing lug holes while ensuring the dimensional accuracy of single holes, thus possessing both high precision and high reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cutting tool.

[0020] Figure 2 This is a schematic diagram of the workpiece's structure.

[0021] Figure 3 This is a schematic diagram of the hole before machining.

[0022] The markings in the diagram are: 1-cutting edge, 2-avoidance section, 3-support section, 4-tool holder, 5-edge guide section, 6-retraction guide section. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] A machining tool for a long-spacing set of lugs, the set of lugs comprising at least two parallel lugs, each lug having a lug hole, the lug holes being coaxial, such as... Figure 1-3 As shown, the machining tool includes a cutting edge 1, a clearance section 2, a support section 3, and a tool holder 4 arranged sequentially from front to back. When the thickness of a single lug is X and the distance between two lugs is Y, the distance from the front end of the cutting edge 1 to the front end of the support section 3 is not greater than X+Y, and the distance from the front end of the cutting edge 1 to the rear end of the support section 3 is not less than X+Y.

[0026] The cutting edge 1 is the core machining part of the tool, responsible for finishing the lug holes to ensure that the hole diameter and surface roughness meet the requirements. The clearance section 2 is located between the cutting edge 1 and the support section 3. Its diameter is slightly smaller than the precision hole diameter, preventing the tool from contacting the machined hole wall during movement or retraction, thus preventing scratches or compression and ensuring machining quality. The diameter of the support section 3 forms a precise fit with the machined hole. When cutting subsequent lug holes, the support section 3 enters the previously machined hole, providing radial support and suppressing vibration and deformation caused by tool overhang. The tool holder 4 connects to the machine tool spindle, transmitting cutting force and torque. Its rigidity and clamping stability directly affect the overall performance of the tool. The distance between the front end of the support section 3 and the front end of the cutting edge 1 is no greater than X+Y, ensuring that when the cutting edge 1 begins machining the subsequent lug hole, the support section 3 has partially entered the previous hole, avoiding tool overhang deformation during the initial cutting stage due to support lag. The distance between the rear end of support section 3 and the front end of cutting edge 1 is not less than X+Y, ensuring that when cutting edge 1 completes the machining of the current hole, support section 3 still completely covers the previous hole, providing stable support throughout the process and preventing tool end oscillation from affecting coaxiality. Through reasonable segmentation design and geometric constraints, the coaxiality and stability problems in the machining of long-spacing lugs are effectively solved, achieving both high precision and process reliability.

[0027] In another specific implementation, the distance from the front end of the cutting edge 1 to the front end of the support section 3 is no greater than X, and the distance from the rear end of the cutting edge 1 to the rear end of the support section 3 is no less than 2X+Y. During the machining of the front lug by the cutting edge 1, the front end of the support section 3 is located in front of the rear lug, ensuring that the support section 3 can immediately enter the front lug hole to provide support when the cutting edge 1 just enters the rear lug. Simultaneously, the large distance between the rear end of the support section 3 and the rear end of the cutting edge 1 ensures that even when the cutting edge 1 has completely passed through the front lug, the support section 3 can still fully cover the rear lug hole. This effectively suppresses tool overhang deformation and vibration, and significantly improves the coaxiality accuracy of long-spacing lug holes.

[0028] In another specific implementation, the length of the cutting edge 1 is not less than X. The cutting edge 1 can completely cover the entire machining stroke of the lug hole, avoiding tool marks caused by segmented machining due to the cutting edge 1 being too short; at the same time, with the reasonable layout of the support section 3, while the cutting edge 1 is cutting stably throughout the entire stroke, the support section 3 can always provide effective support within the machined hole. Preferably, the length of the cutting edge 1 is X, to avoid the risk of deflection due to the tool being too long.

[0029] In another specific implementation, the cutting edge 1 is provided with a cutting edge guide section 5 at its front end. The guide section forms a progressive cutting transition, effectively reducing the impact load during initial entry and preventing deformation of thin-walled parts due to excessive instantaneous force.

[0030] In another specific embodiment, the cutting edge guide section 5 is 8-12°. This angle provides sufficient cutting guiding force to ensure smooth tool entry into the workpiece, while avoiding radial force overload caused by an excessively large angle. In another specific embodiment,

[0031] In another specific implementation, the cross-sections of the avoidance section 2 and the support section 3 are circular. The avoidance section 2 achieves interference-free passage through precise diameter control, avoiding scratches on the machined surface, while the support section 3 provides uniform support force throughout the circumference, effectively suppressing radial vibration of the tool. Together with the cutting edge guide section 5 and the cutting edge 1 of sufficient length, the system rigidity and stability of long-spacing hole machining are significantly improved while ensuring machining accuracy.

[0032] In another specific implementation, the cutting edge 1, the clearance section 2, the support section 3, and the tool holder 4 are coaxial. This ensures that the cutting force transmission path is completely aligned with the tool centerline, effectively eliminating the additional bending moment caused by eccentric cutting. In the machining of long-spacing lug holes, this not only guarantees the shape accuracy of a single hole but also significantly improves the coaxiality consistency between multiple holes, while greatly reducing the risk of tool vibration and runout.

[0033] In another specific implementation, the diameter of the clearance section 2 is smaller than that of the cutting edge 1. This creates a necessary clearance space during tool movement, effectively preventing contact friction between the non-cutting area and the machined hole wall, thus protecting the precision of the machined surface and reducing unnecessary cutting resistance.

[0034] In another specific implementation, the rear end of the cutting edge 1 is provided with a retraction guide section 6. This allows the tool to smoothly transition when exiting the hole after cutting, avoiding burrs or scratches at the hole opening caused by traditional right-angle retraction, and forming a bidirectional guiding protection with the front edge guide section 5. Furthermore, the retraction guide section 6 is a tapered cutting edge 1 similar to the edge guide section 5.

[0035] In another specific implementation, the diameter of the support section 3 is the diameter of the precision hole in the workpiece, with a tolerance of -0.02 to -0.05. By strictly controlling the fit clearance between the support section 3 and the precision hole, frictional damage caused by interference fit is avoided, and support failure caused by excessive clearance is prevented, thus forming a stable dynamic reference during the processing.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. The present utility model extends to any new features or combinations disclosed in this specification, and any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. It is obvious to those skilled in the art that the present utility model is not limited to the details of the above exemplary embodiments, and that detailed technical features not disclosed in this embodiment, such as specific structures, are all prior art and can be obtained by those skilled in the art from the prior art; the connection method can be a fixed connection, a detachable connection, or an integral part; it can be a fixed connection, a movable connection, or a hinged connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific manner of the above terms in the embodiments of the present utility model according to the specific circumstances, and the present disclosure does not specifically limit this aspect.

Claims

1. A tool for processing long pitch grommet, the grommet comprising at least two parallel arranged grommets, each grommet having a grommet hole, the grommet holes being coaxial, characterized in that: The machining tool includes a cutting edge (1), a clearance section (2), a support section (3), and a tool holder (4) arranged sequentially from front to back. When the thickness of a single lug is X and the distance between two lugs is Y, the distance from the front end of the cutting edge (1) to the front end of the support section (3) is not greater than X+Y, and the distance from the front end of the cutting edge (1) to the rear end of the support section (3) is not less than X+Y.

2. The tooling knife for long pitch grommet sets of claim 1, wherein: The distance between the front end of the cutting edge (1) and the front end of the support section (3) is not greater than X, and the distance between the rear end of the cutting edge (1) and the rear end of the support section (3) is not less than 2X+Y.

3. The tooling knife for long pitch grommet sets of claim 1, wherein: The length of the cutting edge (1) is not less than X.

4. The tooling knife for long pitch grommet sets of claim 1, wherein: The cutting edge (1) is provided with a cutting edge guide section (5) at its front end.

5. The tooling knife for long pitch grommet sets of claim 4, wherein: The cutting edge guide section (5) is 8-12°.

6. The tooling knife for long pitch grommet sets of claim 1, wherein: The cross-sections of the avoidance section (2) and the support section (3) are circular.

7. The tooling knife for long pitch grommet sets of claim 6, wherein: The cutting edge (1), the clearance section (2), the support section (3), and the tool holder (4) are coaxial.

8. The tooling knife for long pitch grommet sets of claim 7, wherein: The diameter of the avoidance section (2) is smaller than that of the cutting edge (1).

9. The tool for processing long-span grommets according to claim 1, characterized in that: The cutting edge (1) has a retraction guide section (6) at its rear end.

10. The tool for processing long-span grommets according to claim 1, characterized in that: The diameter of the support section (3) is the diameter of the precision hole of the workpiece, with a tolerance of -0.02 to -0.05.

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