Cutting tool

Abstract

The utility model discloses a cutting tool. The cutting tool comprises a blade lower surface and a blade mounting groove, the lower surface of the blade is sunken to form a limiting groove, and comprises an expansion part and a strip-shaped part which are communicated with each other; an annular boss and a strip-shaped boss which are matched with the expansion part and the strip-shaped part respectively and are tightly attached are arranged at the groove bottom of the blade installation groove, the moving tendency of the annular boss towards the strip-shaped part is limited by the expansion part, and the annular boss and the strip-shaped boss are arranged independently. The utility model aims to provide the cutting tool which is stably mounted.

Description

Technical Field

[0001] This utility model belongs to the field of machining tools, and in particular relates to a cutting tool. Background Technology

[0002] In the field of machining, high-speed milling technology has become one of the core processes of modern precision manufacturing due to its high processing efficiency and excellent forming accuracy. However, current mainstream milling tools still have significant technical defects in high-speed cutting conditions: First, most inserts lack effective multi-dimensional positioning structures, and traditional anti-rotation devices generally suffer from insufficient stability, making it difficult to simultaneously meet the dual positioning requirements of radial and circumferential directions; second, the tool system is prone to abnormal wear, cutting force fluctuations, and machining accuracy decay during high-speed operation, which seriously restricts machining quality and tool life. In addition, the existing manufacturing processes for complex-structure inserts generally suffer from industrialization bottlenecks due to cumbersome procedures and excessively high costs.

[0003] Analysis of typical technical solutions reveals inherent flaws in current designs. For example, the large-plane positioning scheme for the cutting tool used in patent EP1344595B1, while providing a basic support surface, is prone to displacement deviations during high-speed cutting due to a lack of rotational constraints, leading to decreased tool clamping stability. In actual machining, this structural defect can cause radial runout of the tool, thereby accelerating tool wear and affecting workpiece surface quality. Another typical solution, such as the toothed positioning structure proposed in patent EP1791671B1, attempts to enhance positioning through meshing tooth profiles, but its insufficient tooth depth design results in limited anti-rotation effectiveness. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a cutting tool that is securely mounted.

[0005] This application provides a cutting tool, including:

[0006] The blade has a lower surface and a blade mounting groove. The lower surface of the blade is recessed to form a limiting groove, which includes a connected enlarged part and a strip-shaped part. The bottom of the blade mounting groove is provided with an annular boss and a strip-shaped boss that cooperate with and fit tightly with the enlarged part and the strip-shaped part, respectively. The tendency of the annular boss to move towards the strip-shaped part is restricted by the enlarged part. The annular boss and the strip-shaped boss are set independently.

[0007] Specifically, the enlarged portion and the annular protrusion are both circular, while the strip-shaped portion and the strip-shaped protrusion are both rectangular.

[0008] Specifically, both the strip-shaped portion and the strip-shaped protrusion are trapezoidal, with the lower base of the trapezoid close to the enlarged portion or the annular protrusion, and the upper base of the trapezoid away from the enlarged portion or the annular protrusion.

[0009] Specifically, the groove walls of the enlarged portion and the strip-shaped portion are both stepped, and correspondingly, the outer surfaces of the annular boss and the strip-shaped boss are both stepped to match them.

[0010] Specifically, a strip-shaped portion is provided on each of the two opposite sides of the enlarged portion.

[0011] Furthermore, a screw hole is provided in the middle of the lower surface of the blade, and the enlarged portion is arranged around the screw hole.

[0012] Specifically, the limiting groove is located in the middle of the lower surface of the blade, dividing the remaining part of the lower surface of the blade into two equal parts.

[0013] Furthermore, it also includes an insert having the lower surface of the insert, a first main cutting edge flank face, and a second main cutting edge flank face; the second main cutting edge flank face is connected to the lower surface of the insert, and the first main cutting edge flank face and the second main cutting edge flank face are respectively arranged vertically and intersect to form an upper boundary line, which is parallel to the lower surface of the insert.

[0014] Furthermore, the blade also has an upper surface disposed opposite to the lower surface of the blade; the distances between the upper boundary line and the upper surface and the lower surface of the blade are z1 and z2, respectively, wherein 0.5cm≥z1 / z2≥0.1cm.

[0015] Furthermore, the blade has a first main cutting edge flank face, a second main cutting edge flank face, a finishing edge flank face, a radial flank face, a circular arc flank face, and a transition flank face extending between the upper surface and the lower surface of the blade, respectively; wherein, the second main cutting edge flank face, the finishing edge flank face, the radial flank face, and the transition flank face are all planar, while the first main cutting edge flank face is non-planar.

[0016] The improvements of this application bring the following advantages: The cutting tool disclosed in this application has a mutually cooperating limiting mechanism (limiting groove and annular boss, strip boss) on the lower surface of the insert and at the insert mounting groove. It can not only prevent radial displacement, but also prevent rotational displacement, providing bidirectional limiting and making the insert clamping more stable. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a cutting tool according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the bottom surface structure of the blade in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the blade mounting groove in an embodiment of this application;

[0020] Figure 4This is a three-dimensional structural diagram of the blade in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the side structure of the blade in an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the top surface structure of the blade in an embodiment of this application;

[0023] Among them, 1-cutting tool, 2-tool body, 3-insert, 4-mounting screw, 5-insert upper surface, 6-insert lower surface, 7-circumferential side, 8-cutting edge, 9-screw hole, 10-limiting groove, 11-insert mounting groove, 12-boss, 711-first main cutting edge flank face, 712-second main cutting edge flank face, 713-upper boundary line, 72-finishing edge flank face, 73-radial flank face, 74-circular arc flank face, 75-transition flank face, 81-main cutting edge, 82-finishing edge, 83-avoiding edge, 84-circular arc edge, 85-transition edge, 101-expansion part, 102-strip-shaped part, 121-strip-shaped boss, 122-annular boss. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0025] Please see Figure 1-6 This application discloses a cutting tool 1, including a lower surface 6 of the insert and an insert mounting groove 11. The lower surface 6 of the insert is recessed to form a limiting groove 10. The bottom of the insert mounting groove 11 is provided with a boss 12 that cooperates with the limiting groove 10. The limiting groove 10 and the boss 12 together form a limiting mechanism to limit the insert 3 in both directions, making the insert 3 more securely mounted. Furthermore, with only a single wide groove, it is easier to process, improves processing efficiency and quality, and reduces production costs.

[0026] As one embodiment, the limiting groove 10 includes a connected enlarged portion 101 and a strip-shaped portion 102. The boss 12 includes an annular boss 122 and a strip-shaped boss 121 that respectively cooperate with and fit tightly against the enlarged portion 101 and the strip-shaped portion 102. The tendency of the annular boss 122 to move towards the strip-shaped portion 102 is restricted by the enlarged portion 101. The annular boss 122 and the strip-shaped boss 121 are independently provided. The annular boss 122 and the strip-shaped boss 121 are independent of each other and do not connect, which makes them easier to manufacture and lowers the cost from a manufacturing process perspective.

[0027] Specifically, the annular boss 122 is embedded in the enlarged portion 101, and the strip-shaped boss 121 is embedded in the strip-shaped portion 102. The outer surfaces of the annular boss 122 and the strip-shaped boss 121 are tightly fitted to the groove walls of the enlarged portion 101 and the strip-shaped portion 102, respectively.

[0028] like Figure 2 As shown, the enlarged portion 101 is wider than the strip portion 102, causing it to narrow abruptly from the enlarged portion 101 to the strip portion 102. This results in the annular boss 122, which is nearly the same width as the enlarged portion 101 (closely fitted), being restricted from moving towards the strip portion 102 by the junction of the enlarged portion 101 and the strip portion 102, thus limiting the displacement of the blade 3 in the radial direction.

[0029] The outer side of the strip-shaped boss 121 fits tightly against the groove wall of the strip-shaped part 102, so that the blade 3 will be blocked and restricted by the outer side of the strip-shaped boss 121 whether it rotates clockwise or counterclockwise, thereby limiting the rotational displacement of the blade 3.

[0030] In the application, radial displacement refers to the displacement from the rotation axis of the tool body outward, and rotational displacement refers to the displacement generated by the rotation of the cutting tool around the mounting screw.

[0031] As an example, the enlarged portion 101 and the annular boss 122 can be rectangular, triangular, regular hexagonal, regular pentagonal, etc., preferably circular, for ease of processing.

[0032] As an example, the strip portion 102 and the strip boss 121 are preferably rectangular.

[0033] As one embodiment, both the strip-shaped portion 102 and the strip-shaped boss 121 are trapezoidal, with the lower base of the trapezoid close to the enlarged portion 101 or the annular boss 122, and the upper base of the trapezoid away from the enlarged portion 101 or the annular boss 122. By using the strip-shaped portion 102, which gradually narrows from the enlarged portion 101, the radial displacement of the blade 3 can be further restricted.

[0034] As an example, such as Figure 2 As shown, each of the two opposite sides of the enlarged portion 101 is provided with a strip-shaped portion 102, which is connected to the enlarged portion 101 to form a long strip-shaped limiting groove 10 with an enlarged middle section. The limiting groove 10 is located in the middle of the lower surface 6 of the blade, dividing the remaining part of the lower surface 6 of the blade into two equal parts to ensure that the indexable blade is installed in a consistent manner after being indexed.

[0035] As one embodiment, the groove walls of both the enlarged portion 101 and the strip-shaped portion 102 are stepped to facilitate installation. Correspondingly, the outer surfaces of both the annular boss 122 and the strip-shaped boss 121 are stepped to match them.

[0036] This application provides a cutting tool 1, which includes a blade 3, a tool body 2, and a mounting screw 4. The blade 3 is securely mounted on the blade mounting groove 11 of the tool body 2 by the mounting screw 4.

[0037] The blade 3 includes an upper blade surface 5 and a lower blade surface 6 disposed opposite to each other, a circumferential side surface 7 extending between the upper blade surface 5 and the lower blade surface 6, the circumferential side surface 7 intersecting with the upper surface to form a plurality of cutting edges 8, and a screw hole 9 penetrating the upper blade surface 5 and the lower blade surface 6 for inserting a mounting screw 4.

[0038] The circumferential side 7 includes a first main cutting edge flank face 711, a second main cutting edge flank face 712, a finishing edge flank face 72, a radial flank face 73, a circular arc flank face 74, and a transition flank face 75.

[0039] The cutting edge 8 includes a main cutting edge 81, a finishing edge 82, a clearance edge 83, a circular arc edge 84, and a transition edge 85. The main cutting edge 81 is formed by the intersection of the upper surface 5 and the first cutting edge flank face 711; the finishing edge 82 is formed by the intersection of the upper surface 5 and the finishing edge flank face 72; the clearance edge 83 is formed by the intersection of the upper surface 5 and the radial flank face 73; the circular arc edge 84 is formed by the intersection of the upper surface 5 and the circular arc flank face 74; and the transition edge 85 is formed by the intersection of the upper surface 5 and the transition flank face 75.

[0040] As an example, the first main cutting edge 81 flank face is connected to the upper surface 5 of the insert, and the second main cutting edge 81 flank face is connected to the lower surface 6 of the insert. The first main cutting edge 81 flank face and the second main cutting edge 81 flank face are respectively set up vertically and intersect to form an upper boundary line 713. The upper boundary line 713 is parallel to the lower surface 6 of the insert, which helps to improve the installation stability of the insert.

[0041] As an example, the distances z1 and z2 between the upper boundary line 713 and the upper surface 5 and the lower surface 6 of the blade are z1 or z2, where z1 or z2 = 0.1cm, 0.2cm, 0.25cm, 0.3cm or 0.45cm.

[0042] As an example, the second main cutting edge 81 flank face, the finishing flank face, the radial flank face, and the transition flank face are all planar, while the first main cutting edge 81 flank face is non-planar, in order to improve the strength of the main cutting edge.

[0043] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cutting tool characterized by, It includes a lower surface of the blade and a blade mounting groove; the lower surface of the blade is recessed to form a limiting groove, including a connected enlarged part and a strip-shaped part; the bottom of the blade mounting groove is provided with an annular boss and a strip-shaped boss that cooperate with and fit tightly with the enlarged part and the strip-shaped part respectively, the tendency of the annular boss to move towards the strip-shaped part is restricted by the enlarged part, and the annular boss and the strip-shaped boss are set independently.

2. A cutting tool according to claim 1, characterized in that The enlarged portion and the annular protrusion are both circular, while the strip-shaped portion and the strip-shaped protrusion are both rectangular.

3. A cutting tool according to claim 1, wherein Both the strip-shaped portion and the strip-shaped protrusion are trapezoidal, with the lower base of the trapezoid close to the enlarged portion or the annular protrusion, and the upper base of the trapezoid away from the enlarged portion or the annular protrusion.

4. A cutting tool according to claim 1, wherein The groove walls of the enlarged portion and the strip-shaped portion are both stepped, and correspondingly, the outer surfaces of the annular boss and the strip-shaped boss are both stepped to match them.

5. A cutting tool according to Claim 1 wherein, The enlarged portion is provided with a strip-shaped portion on each of its opposite sides.

6. A cutting tool according to Claim 1 wherein, A screw hole is provided in the middle of the lower surface of the blade, and the enlarged part is arranged around the screw hole.

7. A cutting tool according to Claim 1 wherein, The limiting groove is located in the middle of the lower surface of the blade, dividing the remaining part of the lower surface of the blade into two equal parts.

8. A cutting tool according to any one of claims 1-7, characterised in that It also includes a cutting insert having the lower surface of the insert, a first main cutting edge flank face, and a second main cutting edge flank face; the second main cutting edge flank face is connected to the lower surface of the insert, and the first main cutting edge flank face and the second main cutting edge flank face are respectively arranged vertically and intersect to form an upper boundary line, which is parallel to the lower surface of the insert.

9. A cutting tool according to claim 8, characterized in that The blade also has an upper surface that is disposed opposite to the lower surface of the blade; the distances between the upper boundary line and the upper surface and the lower surface of the blade are z1 and z2, respectively, wherein 0.5cm≥z1 / z2≥0.1cm.

10. A cutting tool according to claim 9, characterized in that The cutting tool has a first main cutting edge flank face, a second main cutting edge flank face, a finishing edge flank face, a radial flank face, a circular arc flank face, and a transition flank face extending between the upper surface and the lower surface of the cutting tool, respectively; wherein, the second main cutting edge flank face, the finishing edge flank face, the radial flank face, and the transition flank face are all planar, while the first main cutting edge flank face is non-planar.

Images