Cutter capable of machining right angle
By designing the first and second cutting edge rotational cutting areas of the tool to intersect, the problem that existing tools cannot process 90-degree corners without rounded corners is solved, achieving efficient and seamless product processing and improving assembly precision and efficiency.
Patent Information
- Application Number
- CN202423261230.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing cutting tools cannot process 90-degree corners without rounded corners, resulting in gaps at the edges and corners of the processed products, affecting the product's appearance and processing efficiency.
Design a cutting tool including a tool holder, a first welding groove and a second welding groove, with a first cutting part and a second cutting part respectively installed in the groove, the first cutting edge extending vertically and the second cutting edge extending laterally, the rotating cutting areas intersecting to form a 90-degree intersection without rounded corners, so as to achieve the production of products without rounded corners in one cutting operation.
By machining products with 90-degree edges and no rounded corners in a single cut, assembly precision is improved, assembly gaps are avoided, and processing efficiency is increased.
Smart Images
Figure CN223616790U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining tool technology, and in particular to a tool that can machine right angles. Background Technology
[0002] Currently, when processing the high-gloss finish on the metal surfaces of mobile phones or computers, ultra-precision cutting tools are typically used to achieve a mirror finish. For example, when processing the high-gloss effect on some MCDs, tools with 90-degree rounded corners are required.
[0003] Existing right-angle machining tools typically use a single blade to machine right angles. The blade consists of a connected transverse cutting edge and a longitudinal cutting edge, which connect to form a right angle. However, when machining two connected cutting edges, existing tools inevitably produce a small radius at the connection point. This results in the same radius at the edges and corners of the machined product. For products requiring precise assembly and high aesthetic standards, the presence of radius at the edges and corners can create a small gap, affecting the product's appearance. Another existing method for machining right angles involves machining the transverse and longitudinal surfaces separately to form a right angle without radius. However, this method requires the transverse and longitudinal cutting tools to machine the product separately, resulting in two overall machining operations, which significantly impacts processing efficiency. Utility Model Content
[0004] The main purpose of this utility model is to provide a cutting tool that can process right angles, aiming to solve the problem that existing cutting tools cannot process 90-degree high-gloss effects without rounded corners.
[0005] To achieve the above objectives, this utility model proposes a cutting tool capable of machining right angles, comprising:
[0006] The tool holder has a first welding groove and a second welding groove.
[0007] A first cutting section is located in the first welding groove, and a vertically extending first cutting edge is provided on the side of the first cutting section;
[0008] The second cutting part is located in the second welding groove, and the end of the second cutting part is provided with a second cutting edge that extends laterally.
[0009] The highest position of the second cutting edge is not lower than the lowest position of the first cutting edge, and the rotating cutting area of the first cutting edge intersects with the rotating cutting area of the second cutting edge.
[0010] Optionally, the diameter of the rotating cutting area of the first cutting edge is 4.19 mm, the diameter of the rotating cutting area of the second cutting edge at the end closer to the center of the tool shank is less than 4.19 mm, and the diameter of the rotating cutting area at the other end of the second cutting edge is greater than 4.19 mm.
[0011] Optionally, the end of the tool holder includes a first section and a second section, the first section being higher than the second section, the first blade being fixed to the first section, and the second blade being fixed to the second section.
[0012] Optionally, the highest position of the second blade is 0.3mm-0.5mm higher than the lowest position of the first blade.
[0013] Optionally, the first welding groove and the second welding groove are located on opposite sides of the tool holder, the openings of the first welding groove and the second welding groove face opposite directions, and the first cutting edge and the second cutting edge face opposite directions.
[0014] Optionally, the tool holder is provided with a first clearance notch and a second clearance notch, the first cutting part extends into the first clearance notch from the first welding groove, the first clearance notch avoids the first cutting edge, the second cutting part extends into the second clearance notch from the second welding groove, and the second clearance notch avoids the second cutting edge.
[0015] Optionally, the tip deflection angle of the first and second cutting sections is 0.1-0.2 degrees.
[0016] Optionally, the first blade and the second blade have the same structure. The first blade has a first rear angle and a second rear angle at the position of the first blade edge. The angle of the first rear angle is 0-10 degrees, and the angle of the second rear angle is greater than the angle of the first rear angle.
[0017] Optionally, the blade width of the first blade and the second blade is 0.05-0.15 mm.
[0018] Optionally, both the first and second cutting sections are made of single-crystal diamond; the cutting rod is made of tungsten steel.
[0019] The beneficial effects of this utility model are as follows: it solves the problem that existing cutting tools cannot process 90-degree edges without rounded corners. The first and second welding grooves at the end of the tool shank are used to accommodate the first and second cutting sections, respectively. The first cutting edge on the first cutting section extends vertically, and the second cutting edge on the second cutting section extends horizontally. When the tool shank rotates circumferentially along the axis, the first cutting edge forms a vertical rotating cutting area, and the second cutting edge simultaneously forms a horizontal rotating cutting area. The two rotating cutting areas intersect, so that the cutting path of the first cutting edge and the cutting path of the second cutting edge form a 90-degree intersection without rounded corners. This allows the tool to process products with 90-degree edges without rounded corners in one cut, improving the precision during assembly and preventing assembly gaps after assembly. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 This is a first-view structural diagram of the tool of this utility model that can process right angles;
[0022] Figure 2 This is a first-view structural diagram of the tool of this utility model that can process right angles;
[0023] Figure 3 This is a top view of the cutting tool of this utility model that can process right angles;
[0024] Figure 4 This is a front view schematic diagram of the cutting tool of this utility model that can process right angles;
[0025] Figure 5 This is a front view schematic diagram of the combination of the first and second cutting tools of this utility model;
[0026] Figure 6 This is a partial cross-sectional structural diagram of the first cutting tool of this utility model;
[0027] Label Explanation:
[0028] 1. Tool holder; 11. First welding groove; 12. Second welding groove; 13. First section; 131. First inclined plane; 14. Second section; 141. Second inclined plane; 15. First clearance notch; 16. Second clearance notch;
[0029] 2. First cutting edge; 21. First cutting edge; 22. First rear angle; 23. Second rear angle;
[0030] 3. Second cutting section; 31. Second cutting edge;
[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0032] 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.
[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0035] One embodiment of this utility model proposes a cutting tool capable of machining right angles, see reference. Figure 1 and Figure 2 ,include:
[0036] The tool holder has a first welding groove and a second welding groove.
[0037] A first cutting section is located in the first welding groove, and a vertically extending first cutting edge is provided on the side of the first cutting section;
[0038] The second cutting part is located in the second welding groove, and the end of the second cutting part is provided with a second cutting edge that extends laterally.
[0039] The highest position of the second cutting edge is not lower than the lowest position of the first cutting edge, and the rotating cutting area of the first cutting edge intersects with the rotating cutting area of the second cutting edge.
[0040] This embodiment solves the problem that existing cutting tools cannot process 90-degree edges without rounded corners. The first and second welding grooves at the end of the tool shank are used to accommodate the first and second cutting edges, respectively. The first cutting edge on the first cutting edge extends vertically, and the second cutting edge on the second cutting edge extends horizontally. When the tool shank rotates circumferentially along its axis, the first cutting edge forms a vertical rotating cutting area, and the second cutting edge simultaneously forms a horizontal rotating cutting area. The two rotating cutting areas intersect, causing the cutting paths of the first and second cutting edges to intersect at a 90-degree angle without rounded corners. This allows the tool to process products with 90-degree edges without rounded corners in a single cut, improving assembly precision and preventing assembly gaps. In this embodiment, the first and second welding grooves are respectively located at the end of the tool shank, with the first cutting edge located in the first welding groove and the second cutting edge located in the second welding groove. Specifically, the first and second cutting edges can be fixedly connected to the tool shank by vacuum brazing, achieving a stronger connection. The first cutting edge is located on the side of the first cutting section away from the center of the tool holder, so that when the tool holder rotates circumferentially, the first cutting edge can cut the vertical side of the product. The second cutting edge is located at the upper end of the second cutting section, so that when the tool holder rotates circumferentially, the second cutting edge can cut the horizontal surface of the product.
[0041] Because the vertical cutting area of the first cutting edge intersects with the horizontal cutting area of the second cutting edge, and the first cutting edge is perpendicular to the second cutting edge, the tool can process products with 90-degree edges and no rounded corners. In this embodiment, the first and second cutting edges are not connected, avoiding the problem that existing tools inevitably produce a small rounded corner at the connection point when grinding the first and second cutting edges.
[0042] Furthermore, the diameter of the rotating cutting area of the first cutting edge is 4.19 mm, the diameter of the rotating cutting area of the second cutting edge at the end closer to the center of the tool shank is less than 4.19 mm, and the diameter of the rotating cutting area at the other end of the second cutting edge is greater than 4.19 mm. In this embodiment, the distance between the first cutting edge and the center of the tool shank is 2.095 mm, so that when the first cutting edge rotates around the central axis of the tool shank, it forms a cylindrical cutting area with a diameter of 4.19 mm. The outermost surface of the cylindrical cutting area is the contact surface when cutting the side of the product. When cutting the product, the tool shank moves in a straight line while rotating, so that the first cutting edge can cut a flat vertical side. The second cutting edge is horizontally positioned, with one end of the second cutting edge closer to the center of the tool shank being less than 2.095mm from the center, and the other end being greater than 2.095mm from the center. Specifically, the two ends of the second cutting edge are 1.2mm and 3.0mm from the center of the tool shank, respectively, thus forming a circular shape in the rotating cutting area of the second cutting edge. The second cutting edge cuts the horizontal plane of the product, and the vertical contact surface of the first cutting edge intersects with the circular shape of the second cutting edge, with the angle of intersection being exactly 90 degrees. This results in a 90-degree cut end without rounded corners on the product. It can be understood that the above diameter range can be adjusted according to different products being cut, and this diameter range is not limited.
[0043] Furthermore, the end of the tool holder includes a first section and a second section, the first section being higher than the second section. The first cutting part is fixed to the first section, and the second cutting part is fixed to the second section. In this embodiment, the remaining part of the tool holder is the tool holder body. The first and second sections are integrally connected. One end of the second section is connected to the first section, and the other end is connected to the tool holder body. The connection between the second section and the tool holder body forms a connecting frustum, and the angle between the side of the connecting frustum and the axis of the tool holder is 30 degrees. The height of the first section is 1.2 mm, and the first section is an approximately quarter-cylindrical structure with a rotation diameter of 3.6 mm. The height of the second section is 3.5 mm, and the rotation diameter of the second section is 5.4 mm. The first cutting part is welded to the first section and located in the first welding groove, and the second cutting part is welded to the second section and located in the second welding groove.
[0044] Furthermore, the highest point of the second cutting edge is 0.3mm-0.5mm higher than the lowest point of the first cutting edge. In this embodiment, a second cutting edge is provided at the highest end of the second cutting edge, and the second cutting edge extends vertically along the side of the second cutting edge, so that the second cutting edge is 0.3mm-0.5mm higher than the lowest end of the first cutting edge, so as to ensure that the cutting path of the second cutting edge intersects with the cutting path of the first cutting edge. It can be understood that in order to ensure that the cut product can form a 90-degree edge without rounded corners, it is only necessary to make the height of the second cutting edge between the two vertical ends of the first cutting edge.
[0045] Furthermore, the first welding groove and the second welding groove are located on opposite sides of the tool holder, with their openings facing opposite directions, and the first cutting edge and the second cutting edge facing opposite directions. The first welding groove and the second welding groove are respectively formed on opposite sides of the tool holder's axis, with the opening of the first welding groove facing opposite directions to the opening of the second welding groove. This ensures that when the tool holder rotates, the circumferential cutting directions of the first and second cutting edges are the same. Specifically, both the first and second welding grooves are inclined grooves extending towards the bottom of the tool holder. The first welding groove is formed by sloping downwards from the top of the first section, passing through the first section, the second section, and the tool holder body, resulting in a length of 7.9 mm. The first cutting edge is located within the first welding groove, specifically welded to the first section. The second welding groove is also formed from the top of the first section, passing through the first section, the second section, and the tool holder body. However, since the first section is only approximately one-quarter the size of a cylinder, and its height is 1.2 mm, the length of the first welding groove is 6.7 mm. In addition, when the first and second cutting edges are rotating and cutting, the first and second welding grooves act as drainage grooves to quickly discharge product residue after cutting.
[0046] Furthermore, the tool holder is provided with a first clearance notch and a second clearance notch. The first cutting part extends into the first clearance notch from the first welding groove, and the first clearance notch avoids the first cutting edge. The second cutting part extends into the second clearance notch from the second welding groove, and the second clearance notch avoids the second cutting edge. The first clearance notch is vertically opened downward along the edge of the first segment and communicates with the first welding groove. Specifically, the height of the first clearance notch is 3.5mm, and the first clearance notch is cut 1.8mm from the center of the tool holder, i.e., the width is 0.9mm. The first cutting part is welded to the side of the first segment near the first welding groove, and the side of the first cutting part away from the center of the tool holder protrudes from the first welding groove and extends into the first clearance notch. This allows the first clearance notch to avoid the first cutting edge on the first cutting part when the tool holder rotates, preventing the first cutting edge from being blocked by the side of the first segment during rotational cutting. Specifically, the width of the first cutting part extending into the first clearance notch is 0.5mm. The second clearance notch is horizontally opened along the upper end face of the second section, and the second clearance notch is connected to the second welding groove. Specifically, the height of the second clearance notch is the same as the height of the first section, which is 1.2mm. The second clearance notch is opened for 2.9mm along the side of the upper end face of the second section towards the center of the tool holder, that is, the width is 2.9mm. The second cutting part is welded to the side of the second section near the second welding groove. The upper end of the second cutting part protrudes from the second welding groove and extends into the second clearance notch, so that when the tool holder rotates, the second clearance notch can avoid the second cutting edge at the upper end of the second cutting part, so as to prevent the second cutting edge from being blocked during rotational cutting. Specifically, the width of the second cutting part extending into the second clearance notch is 0.5mm.
[0047] In this embodiment, the first segment and the second segment are initially two cylindrical structures. After the first welding groove and the second welding groove, the first clearance notch and the second clearance notch are opened, the remaining part of the first segment forms an approximately one-quarter cylindrical structure, and the second segment forms a cylindrical structure with grooves on both sides.
[0048] Furthermore, the first segment has a first inclined plane, and the second segment has a second inclined plane. The first inclined plane is located at the upper end of the first segment, and the angle between the first inclined plane and the horizontal plane is 25 degrees. The second inclined plane is located at the upper end of the second segment, and the second inclined plane is close to the second cutting edge. The angle between the second inclined plane and the horizontal plane is also 25 degrees. When the tool holder rotates, the first and second inclined planes are used to avoid the product and prevent interference with the cutting edge.
[0049] Furthermore, the blade tip angle of the first and second blades is 0.1-0.2 degrees. In this embodiment, the upper blade tip of the first blade is also provided with a transverse cutting edge, the angle between this cutting edge and the horizontal plane is 0.1-0.2 degrees, and the angle between the second cutting edge on the second blade and the horizontal plane is 0.1-0.2 degrees. The blade tip angle of 0.1-0.2 degrees is more conducive to the blades producing a high-gloss effect on the product surface.
[0050] Furthermore, the first and second cutting sections have the same structure. The first cutting section has a first clearance angle and a second clearance angle at the position of the first cutting edge. The angle of the first clearance angle is 0-10 degrees, and the angle of the second clearance angle is greater than the angle of the first clearance angle. In this embodiment, the side of the first cutting section includes a first cutting edge and a relief slope connected to the first cutting edge. The first clearance angle is the angle between the plane of the first cutting edge and the machining direction, and the second clearance angle is the angle between the relief slope on the first cutting section and the machining direction. The angle of the second clearance angle is greater than the angle of the first clearance angle, so that the relief slope of the first cutting section will not obstruct the cutting of the first cutting edge. Specifically, in this embodiment, the angle of the first clearance angle is 5 degrees, and the angle of the second clearance angle is 25 degrees. Of course, it can be understood that the angles of the first and second clearance angles can be determined according to the product to be processed, but the angles of the first and second clearance angles should not be too large, as this will cause the first cutting edge to become thinner and more easily damaged. The second cutting section also has the same first and second clearance angles at the position of the second cutting edge as the first cutting section.
[0051] Furthermore, the blade widths of the first and second blades are 0.05-0.15 mm. The blade widths of the first and second blades are between 0.05-0.15 mm to ensure the strength and sharpness of the first blade. Specifically, the blade width of the first blade can be 0.1 mm, and the blade width of the second blade can also be 0.1 mm.
[0052] In this embodiment, the length and width of the first cutting part are both 2mm. On the side of the first cutting part near the center of the tool shank, a corner is obliquely cut off at a position of 0.5mm from top to bottom. The angle between the cut surface and the vertical direction is 20 degrees to avoid the corner of the first cutting part abutting against the wall of the first welding groove during welding, thus affecting the welding position. The first and second cutting parts have the same structure. The length and width of the second cutting part are also both 2mm. The second cutting part also has the same cutting angle on the side near the center of the tool shank.
[0053] Furthermore, both the first and second cutting sections are made of single-crystal diamond; the tool holder is made of tungsten steel. The tool holder is made of tungsten steel to increase its strength, while the first and second cutting sections are made of single-crystal diamond to improve the high-gloss finish of the cutting edge.
[0054] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A cutting tool capable of machining right angles, characterized in that, include: The tool holder has a first welding groove and a second welding groove. A first cutting section is located in the first welding groove, and a vertically extending first cutting edge is provided on the side of the first cutting section; The second cutting part is located in the second welding groove, and the end of the second cutting part is provided with a second cutting edge that extends laterally. The highest position of the second cutting edge is not lower than the lowest position of the first cutting edge, and the rotating cutting area of the first cutting edge intersects with the rotating cutting area of the second cutting edge.
2. The cutting tool capable of machining right angles according to claim 1, characterized in that, The diameter of the rotating cutting area of the first cutting edge is 4.19 mm. The diameter of the rotating cutting area of the second cutting edge at the end closer to the center of the tool shank is less than 4.19 mm, and the diameter of the rotating cutting area at the other end of the second cutting edge is greater than 4.19 mm.
3. The cutting tool capable of machining right angles according to claim 1, characterized in that, The end of the blade holder includes a first section and a second section, the first section being higher than the second section, the first blade being fixed to the first section, and the second blade being fixed to the second section.
4. The cutting tool capable of machining right angles according to claim 3, characterized in that, The highest point of the second cutting part is 0.3mm-0.5mm higher than the lowest point of the first cutting part.
5. The cutting tool capable of machining right angles according to claim 1, characterized in that, The first welding groove and the second welding groove are located on opposite sides of the tool holder, and the openings of the first welding groove and the second welding groove face opposite directions, as do the first cutting edge and the second cutting edge.
6. The cutting tool capable of machining right angles according to claim 1, characterized in that, The tool holder is provided with a first clearance notch and a second clearance notch. The first cutting part extends into the first clearance notch from the first welding groove, and the first clearance notch avoids the first cutting edge. The second cutting part extends into the second clearance notch from the second welding groove, and the second clearance notch avoids the second cutting edge.
7. The cutting tool capable of machining right angles according to claim 1, characterized in that, The tip deflection angle of the first and second cutting sections is 0.1-0.2 degrees.
8. The cutting tool capable of machining right angles according to claim 1, characterized in that, The first blade and the second blade have the same structure. The first blade has a first rear angle and a second rear angle at the position of the first blade edge. The angle of the first rear angle is 0-10 degrees, and the angle of the second rear angle is greater than the angle of the first rear angle.
9. The cutting tool capable of machining right angles according to claim 1, characterized in that, The blade width of the first blade and the second blade is 0.05-0.15mm.
10. The cutting tool capable of machining right angles according to any one of claims 1 to 9, characterized in that, Both the first and second cutting sections are made of single-crystal diamond; the cutting rod is made of tungsten steel.