A tool suitable for cross-hole intersecting line deburring processing

Abstract

The utility model relates to a kind of cutting tools, specifically discloses a kind of tool suitable for cross hole intersection line deburring processing.The tool includes tool bit and tool bar, the tool bit is located at tool bar one end;The side surface of tool bit is equipped with chip flute and relief, the side of chip flute close to relief is rake face, the rake face and relief form cutting edge by intersection;The relief includes front part and rear part, the front part and rear part are sequentially distributed along tool bit axial direction, the front part and rear part are all inclined to set relative to tool bit axial section, and the inclination direction of front part and rear part relative to tool bit axial section is opposite.The tool described above can be in cutting form, and the burr of cross hole intersection line is directly removed, with the advantages of good removal effect and high efficiency.

Description

Technical Field

[0001] This utility model relates to a cutting tool, specifically a tool suitable for deburring intersecting lines of intersecting holes. Background Technology

[0002] Burrs are a common problem in metalworking, such as drilling, turning, milling, and sheet metal cutting. The presence of burrs causes a series of problems, one of which is the risk of cutting operators; therefore, deburring is usually necessary. Deburring and edge finishing of precision parts can account for up to 30% of the cost of the finished part.

[0003] There are many processes available for removing burrs from the surface of ordinary workpieces, such as direct cutting with a milling cutter or high-pressure air blowing. However, burrs at the intersection lines of intersecting holes inside the workpiece are a more troublesome and dangerous problem. Although burrs at intersection lines generally do not cause cuts to operators, they may fall off at any time during subsequent use. When conveying fluids, the detached burrs will accompany the fluid flow, inevitably affecting the operation of the equipment.

[0004] The biggest challenge in removing burrs from intersecting lines is that the burrs are not located on the workpiece surface, making conventional methods ineffective. Furthermore, burrs on intersecting lines of intersecting holes are difficult to remove during turning and drilling due to the adhesive nature of the workpiece material. Removing burrs from small holes with diameters of 3-5mm is even more difficult, especially since the parts are made of materials like 45K and 42CrMo, which have a certain degree of hardness and ductility, further complicating the burr removal process.

[0005] The purpose of this application is to provide a machining tool for deburring the special scenario of intersecting holes. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a tool suitable for deburring the intersection lines of intersecting holes. It can directly remove the burrs of the intersection lines of intersecting holes by cutting, and has the advantages of good removal effect and high efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tool suitable for deburring the intersection line of intersecting holes, comprising a tool head and a tool shank, wherein the tool head is located at one end of the tool shank; the side of the tool head is provided with a chip removal groove and a back face, wherein the side of the chip removal groove near the back face is the front face, and the front face and the back face intersect to form a cutting edge;

[0008] The flank face includes a front portion and a rear portion, which are distributed sequentially along the axial direction of the cutter head. Both the front portion and the rear portion are inclined relative to the axial section of the cutter head, and the inclination directions of the front portion and the rear portion relative to the axial section of the cutter head are opposite.

[0009] The front and rear sections work together, with the rear face having a raised center, and the corresponding cutting edges also arranged in a high-low pattern at both ends. During deburring, the cutter head is inserted into one of the intersecting holes on the workpiece until it aligns with the intersection of the two holes. Due to the high-low pattern of the cutting edges, cutting can be performed within a certain range in the rear direction. By rotating and moving the cutter head, omnidirectional cutting can be achieved on the intersecting lines, efficiently and ingeniously realizing the deburring operation of intersecting holes.

[0010] Preferably, the tool holder includes an integrally formed connecting section and a transition section along the axial direction, the diameter of the transition section is smaller than the diameter of the connecting section, the tool head is integrally connected to the transition section, and the chip removal groove extends to the transition section.

[0011] The connecting section connects to the machine head, while the transition section supports the cutter head and fits into the insertion hole. The separate design of the connecting and transition sections allows for both the strength requirements of the cutter shank and the dimensional requirements of the insertion hole.

[0012] Preferably, the cutting edge includes a first segment, a second segment, a third segment, and a fourth segment from the front end to the rear end of the tool head. The first segment, the second segment, and the third segment all correspond to the front part, and the fourth segment corresponds to the rear part. The inclination angles of the first segment, the second segment, and the third segment relative to the axis of the tool head are all different.

[0013] During machining, the time intervals between the cutting edges participating in the cutting process reduce the instantaneous load on the tool head. Furthermore, the different directions of the cutting forces in each segment reduce the peak cutting force experienced by the tool head. Simultaneously, the different vibration frequencies and phases generated by each segment effectively eliminate chatter and improve cutting stability. Additionally, the discontinuous chips formed by different segments effectively break chips and facilitate chip removal.

[0014] Preferably, the rake face includes a first portion, a second portion, and a third portion, which are arranged at opposite angles to each other. The first portion corresponds to the first segment of the cutting edge, the second portion corresponds to the second segment of the cutting edge, and the third portion corresponds to the third and fourth segments of the cutting edge.

[0015] The main function of the rake face is to guide the chips out. The first, second and third sections are oriented differently, which can guide the chips to flow in different directions, further assisting chip breaking and improving the smoothness of chip removal.

[0016] Preferably, the cutting edge is rounded with a radius of 0.02~0.04mm, which can effectively improve the edge strength.

[0017] Preferably, the surface of the front section is coated with a DLC coating, which can effectively prevent the formation of debris in the front section.

[0018] Preferably, the chip removal groove includes a main section and a head section, the head section is located at the end of the main section corresponding to the cutter head, and the head section is provided with at least one auxiliary cutting surface.

[0019] The auxiliary cutting surface setting can create a larger chip removal space inside the cutter head, matching the extension of the cutting edge, and better removing chips.

[0020] Preferably, the helix angle of the chip removal groove is 30°~45°.

[0021] Preferably, the side of the cutter head is provided with a transition area, which extends from the back face away from the cutting edge to the chip removal groove; the transition area is provided with a plurality of transition surfaces, which are arranged at opposite angles to each other.

[0022] The transition surface setting in the transition region can disrupt the harmonic transmission path of cutting vibration, reduce the overall amplitude, and also provide space for the flow of cutting fluid.

[0023] Preferably, a buffer surface is provided between the transition region and the flank face, and the buffer surface is inclined relative to the flank face; the buffer surface is a curved surface, and the transition surface is a plane.

[0024] The buffer surface can reduce the abrupt shape change between the flank face and the transition area, thus improving the mechanical properties of the cutting tool. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the tool used in this embodiment for deburring the intersection lines of intersecting holes;

[0026] Figure 2 This is a schematic diagram of the frontal partial structure of the tool used for deburring the intersection line of intersecting holes in this embodiment;

[0027] Figure 3 This is a schematic diagram of the lateral partial structure of the tool used in this embodiment for deburring the intersection line of intersecting holes;

[0028] Figure 4This is a partial structural diagram of the tool used in this embodiment for deburring the intersection lines of intersecting holes;

[0029] Figure 5 This is a partial structural diagram from another perspective of the tool used in this embodiment for deburring the intersection lines of intersecting holes. Detailed Implementation

[0030] 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 merely illustrative of the present utility model and are not intended to limit the present utility model. Example

[0031] like Figure 1 As shown, a tool suitable for deburring intersecting holes includes a cutter head 2 and a tool holder 1, with the cutter head 2 located at one end of the tool holder 1. The tool holder 1 includes an integrally formed connecting section 11 and a transition section 12 along its axial direction. The diameter of the transition section 12 is smaller than the diameter of the connecting section 11. The cutter head 2 is integrally connected to the transition section 12, and a chip removal groove 3 extends to the transition section 12. The connecting section 11 is used to connect to a machine head, and the transition section 12 is used to support the cutter head 2 and fit into the insertion hole. The segmented arrangement of the connecting section 11 and the transition section 12 can simultaneously meet the strength requirements of the tool holder 1 and the dimensional requirements within the insertion hole.

[0032] like Figures 2-4 As shown, the side of the cutter head 2 is provided with a chip removal groove 3 and a flank face. The side of the chip removal groove 3 closest to the flank face is the rake face, and the rake face and the flank face intersect to form a cutting edge. Specifically, the cutting edge is rounded with a radius of 0.02~0.04mm, which can effectively improve the edge strength.

[0033] Specifically, such as Figures 2-4 As shown, the helix angle of the chip removal groove 3 is 30°~45°. The chip removal groove 3 includes a main section 31 and a head section 32. The head section 32 is located at the end of the main section 31 corresponding to the cutter head 2, and the head section 32 is provided with at least one auxiliary cutting surface. The setting of the auxiliary cutting surface can form a larger chip removal space within the cutter head 2, matching the extension of the cutting edge, and better removing chips.

[0034] like Figures 2-4As shown, the flank face includes a front portion 261 and a rear portion 262, which are sequentially distributed along the axial direction of the cutter head 2. Both the front and rear portions 261 and 262 are inclined relative to the axial section of the cutter head 2, and their inclination directions relative to the axial section are opposite. The front and rear portions 261 cooperate to form a convex structure in the middle of the flank face, and the corresponding cutting edges are also distributed in a high-middle-low-end configuration. Specifically, the surface of the front portion 261 is coated with a DLC coating, which effectively prevents chip buildup in the front section.

[0035] During deburring, the cutting head 2 is inserted into one of the intersecting holes on the workpiece until it aligns with the intersection of the two holes. Due to the high center and low ends of the cutting edge, the cutting head 2 can perform cutting within a certain range in the rearward direction. By rotating and moving the cutting head 2, omnidirectional cutting can be performed on the intersecting line, thus efficiently and ingeniously achieving the deburring operation of the intersecting line of the intersecting holes.

[0036] like Figures 2-4 As shown, specifically, the cutting edge from the front end to the rear end of the cutter head 2 includes a first segment 24, a second segment 23, a third segment 22, and a fourth segment 21. The first segment 24, the second segment 23, and the third segment 22 all correspond to the front portion 261, and the fourth segment 21 corresponds to the rear portion 262. The inclination angles of the first segment 24, the second segment 23, and the third segment 22 relative to the axis of the cutter head 2 are all different.

[0037] like Figures 2-4 As shown, the corresponding rake face includes a first portion 281, a second portion 282, and a third portion 283, which are arranged at opposite angles. The first portion 281 corresponds to the first segment 24 of the cutting edge, the second portion 282 corresponds to the second segment 23 of the cutting edge, and the third portion 283 corresponds to the third segment 22 and the fourth segment 21 of the cutting edge.

[0038] During machining, the time intervals between the cutting edges participating in the cutting process reduce the instantaneous load on the tool head 2. Furthermore, the different directions of the cutting forces in each segment reduce the peak cutting force experienced by the tool head 2. Simultaneously, the different vibration frequencies and phases generated by each segment effectively eliminate chatter and improve cutting stability. Additionally, the discontinuous chips formed by different segments effectively break chips and facilitate chip removal.

[0039] The main function of the rake face is to guide the chip out. The first section 281, the second section 282 and the third section 283 have different orientations, which can guide the chip to flow in different directions, further assisting chip breaking and improving the smoothness of chip removal.

[0040] like Figures 2-4 As shown, further, the side of the cutter head 2 is provided with a transition region, which extends from the side of the flank face away from the cutting edge to the chip removal groove 3. The transition region has several transition surfaces 25, which are arranged at an angle to each other in pairs. A buffer surface 27 is provided between the transition region and the flank face, and the buffer surface 27 is arranged at an angle relative to the flank face. The buffer surface 27 is a curved surface, while the transition surface 25 is a plane.

[0041] The transition surface 25 in the transition region can disrupt the harmonic transmission path of cutting vibrations, reduce the overall amplitude, and provide space for the flow of cutting fluid. The buffer surface 27 can reduce the abrupt shape change between the flank face and the transition region, improving the mechanical properties of the tool tip 2.

[0042] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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.

Claims

1. A cutting tool suitable for deburring intersecting lines of intersecting holes, characterized in that: It includes a cutting head and a cutting shank, with the cutting head located at one end of the cutting shank; the side of the cutting head is provided with a chip removal groove and a flank face, the side of the chip removal groove near the flank face is the rake face, and the rake face and the flank face intersect to form a cutting edge; The flank face includes a front portion and a rear portion, which are distributed sequentially along the axial direction of the cutter head. Both the front portion and the rear portion are inclined relative to the axial section of the cutter head, and the inclination directions of the front portion and the rear portion relative to the axial section of the cutter head are opposite.

2. The cutting tool according to claim 1, characterized in that: The tool holder includes an integrally formed connecting section and a transition section along the axial direction. The diameter of the transition section is smaller than that of the connecting section. The tool head is integrally connected to the transition section, and the chip removal groove extends to the transition section.

3. The cutting tool according to claim 1, characterized in that: The cutting edge includes a first segment, a second segment, a third segment, and a fourth segment from the front end to the rear end of the tool head. The first segment, the second segment, and the third segment all correspond to the front part, and the fourth segment corresponds to the rear part. The first segment, the second segment, and the third segment all have different inclination angles relative to the cutter head axis.

4. The cutting tool according to claim 3, characterized in that: The rake face includes a first section, a second section, and a third section, which are arranged at opposite angles to each other. The first section corresponds to the first segment of the cutting edge, the second section corresponds to the second segment of the cutting edge, and the third section corresponds to the third and fourth segments of the cutting edge.

5. The cutting tool according to claim 1, characterized in that: The cutting edge is rounded with a radius of 0.02~0.04mm.

6. The cutting tool according to claim 1, characterized in that: The front section surface is coated with a DLC coating.

7. The cutting tool according to claim 1, characterized in that: The chip removal groove includes a main section and a head section. The head section is located at the end of the main section corresponding to the cutter head, and the head section is provided with at least one auxiliary cutting surface.

8. The cutting tool according to claim 7, characterized in that: The helix angle of the chip removal groove is 30°~45°.

9. The cutting tool according to any one of claims 1-8, characterized in that: The side of the cutter head is provided with a transition area, which extends from the back face away from the cutting edge to the chip removal groove; the transition area is provided with several transition surfaces, which are arranged at opposite angles to each other.

10. The cutting tool according to claim 9, characterized in that: A buffer surface is provided between the transition area and the back face, and the buffer surface is inclined relative to the back face; the buffer surface is a curved surface, and the transition surface is a plane.

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