A cutting tool

Abstract

The utility model discloses a tool, including handle and tool bit, the axial one end of tool bit is connected with handle, the axial other end of tool bit is equipped with a plurality of end edges, a plurality of end edges are distributed in the circumferential interval around the axis of tool bit, the circumferential interval of the circumference of tool bit is equipped with a plurality of peripheral edges, and the peripheral edge is connected with end edge one to one, and the chip flute is formed between any two adjacent peripheral edges, and the chip flute includes a plurality of chip removal sections, and a plurality of chip removal sections are distributed along the extension direction of chip flute in the scale of fish, the diameter of tool bit is D, and the width of the rake face of peripheral edge is 0.06D to 0.1D. The tool has a good chip breaking performance, and still can normally complete the chip breaking of chip in the machining process of large feed of tool.

Description

Technical Field

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

[0002] In metal cutting, especially in grooving, the most common grooving is under medium and low feed conditions. After the tool cuts through the chip, the chip breaks under pressure in the chip flue. When the tool is in high feed, the width of the chip is larger, making it more difficult to break. These unbroken and curled chips not only increase the cutting resistance of the tool, but also wrap around the tool, affecting its normal operation. In fact, the chips wrapped around the tool can even scratch the user as the tool rotates. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cutting tool with better chip-breaking performance, which can still break chips normally during high-feed machining.

[0004] A cutting tool according to an embodiment of the present invention includes a handle and a cutting head. One axial end of the cutting head is connected to the handle, and the other axial end of the cutting head is provided with multiple end cutting edges. The multiple end cutting edges are circumferentially spaced around the axis of the cutting head. The circumferential surface of the cutting head is provided with multiple peripheral cutting edges, which correspond one-to-one with and are connected to the end cutting edges. A chip removal groove is formed between any two adjacent peripheral cutting edges. The chip removal groove includes multiple chip removal segments, which are distributed in a fish-scale pattern along the extension direction of the chip removal groove. The diameter of the cutting head is D, and the width of the rake face of the peripheral cutting edge is 0.06D to 0.1D.

[0005] A cutting tool according to an embodiment of the present utility model has at least the following technical effects: In the cutting tool of this application, by setting the width of the rake face of the peripheral cutting edge to 0.06D to 0.1D, the chip curling stroke in roughing and finishing is greatly shortened, improving the chip breaking performance of the tool. Furthermore, the chips in large-mass machining can flow into the chip evacuation groove between any two peripheral cutting edges in the shortest time. Since the chip evacuation groove has multiple chip evacuation segments distributed in a fish-scale pattern along the extension direction of the chip evacuation groove, the irregular curvature and stepped groove shape of the chip evacuation groove achieve layered chip breaking, thereby enabling the tool to break chips in the shortest time. It has good self-chip breaking ability, greatly improving the chip breaking efficiency, and effectively avoiding the problems of chip entanglement and chip adhesion. This application still has very good chip breaking ability in the machining of materials that are difficult to break chips.

[0006] According to some embodiments of the present invention, a cutting tool has a circumferential cutting edge with a circumferential cutting edge rake angle of 4° to 8°.

[0007] According to some embodiments of the present invention, a cutting tool has a first rear angle and a second rear angle, wherein the first rear angle is 7° to 11° and the second rear angle is 25° to 30°.

[0008] According to some embodiments of the present invention, a cutting tool has an end edge with a rake angle of 4° to 8°.

[0009] According to some embodiments of the present invention, a cutting tool has a first rear angle and a second rear angle, wherein the first rear angle is 6° to 12° and the second rear angle is 18° to 24°.

[0010] According to some embodiments of the present invention, a chamfer is provided at the junction of the end edge and the peripheral edge of a cutting tool.

[0011] According to some embodiments of the present invention, a cutting tool has a core diameter of 0.55D.

[0012] According to some embodiments of the present invention, the chip removal groove has a helix angle of 40°.

[0013] According to some embodiments of the present invention, a cutting tool has four end blades and four peripheral blades.

[0014] According to some embodiments of the present invention, a cutting tool has a handle and a cutting head that are integrally formed.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a cutting tool according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the cutter head in the diagram; Figure 3 for Figure 2 AA section view in the middle; Figure 4 for Figure 1 A sectional view of the circumferential blade; Figure 5 for Figure 1 A sectional view of the end cutting edge.

[0017] Figure label: Handle 100; Cutting head 200, peripheral cutting edge 210, end cutting edge 220, chip removal groove 230, chip removal section 231; Front angle of the circumferential blade a1, rear angle of the first circumferential blade a2, rear angle of the second circumferential blade a3; The front angle of the cutting edge is b1, the rear angle of the first cutting edge is b2, and the rear angle of the second cutting edge is b3. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] The following is for reference. Figures 1 to 5 A cutting tool according to an embodiment of the present utility model will be described in detail.

[0023] refer to Figures 1 to 3According to an embodiment of the present invention, a cutting tool includes a handle 100 and a cutting head 200. One axial end of the cutting head 200 is connected to the handle 100, and the other axial end of the cutting head 200 is provided with multiple end cutting edges 220. The multiple end cutting edges 220 are circumferentially spaced around the axis of the cutting head 200. The circumferential surface of the cutting head 200 is provided with multiple peripheral cutting edges 210 at intervals. The peripheral cutting edges 210 correspond one-to-one with the end cutting edges 220 and are connected. A chip removal groove 230 is formed between any two adjacent peripheral cutting edges 210. The chip removal groove 230 includes multiple chip removal segments 231. The multiple chip removal segments 231 are distributed in a fish scale pattern along the extension direction of the chip removal groove 230. The diameter of the cutting head 200 is D, and the width of the rake face of the peripheral cutting edge 210 is 0.06D to 0.1D (including 0.06D and 0.1D).

[0024] In the cutting tool of this application, by setting the width d of the rake face of the peripheral cutting edge 210 to 0.06D to 0.1D, the chip curling stroke in roughing and finishing is greatly shortened, the chip breaking performance of the tool is improved, and the chips in large-mass machining can flow into the chip removal groove 230 between any two peripheral cutting edges 210 in the shortest time. Since the chip removal groove 230 has multiple chip removal segments 231 distributed in a fish-scale pattern along the extension direction of the chip removal groove 230, the irregular curvature and stepped groove shape of the chip removal groove 230 realize the layered breaking of the chips, thereby enabling the tool to break chips in the shortest time, with good self-chip breaking ability, greatly improving the chip breaking efficiency, and effectively avoiding the problems of chip entanglement and chip adhesion. This application still has very good chip breaking ability in the machining of materials that are difficult to break chips.

[0025] Understandably, by setting the width d of the rake face of the peripheral cutting edge 210 to 0.06D to 0.1D, the heat transfer from the chips to the tool body is greatly reduced due to the significantly shortened curling stroke, thus improving the tool's service life. In roughing, even when the depth of cut is large, the stress is dispersed, giving the peripheral cutting edge 210 good anti-chipping properties and providing good protection for the peripheral cutting edge 210.

[0026] refer to Figure 4 In some embodiments of this utility model, the peripheral cutting edge 210 has a peripheral cutting edge rake angle a1, which is 4° to 8° (inclusive). It is understood that this rake angle range balances cutting sharpness and strength, and is suitable for common materials such as steel and aluminum alloys. It avoids the cutting edge becoming fragile due to an excessively large rake angle or the cutting resistance increasing due to an excessively small rake angle, thereby improving the versatility of the tool of this application.

[0027] like Figure 4 As shown, in some embodiments, the peripheral blade 210 also has a first rear angle a2 and a second rear angle a3, the first rear angle a2 being 7° to 11° (inclusive), and the second rear angle a3 being 25° to 30° (inclusive).

[0028] Specifically, the rear angle a2 of the first circumferential blade is a circular arc rear angle, and the rear angle a3 of the second circumferential blade is a planar rear angle.

[0029] Understandably, the peripheral cutting edge clearance angle a2 adopts a small arc clearance angle structure of 7° to 11°, which can guide the chip curling through the curved surface, thereby improving the chip breaking efficiency of the tool of this application, and can improve the chipping resistance and wear resistance during roughing, greatly reducing the increase in cutting force and heat generation caused by chipping of the cutting edge, and greatly reducing the risk of tool breakage; the peripheral cutting edge clearance angle a3 adopts a larger planar clearance angle structure of 25° to 30°, which can reduce cutting heat by reducing the friction between the tool and the workpiece.

[0030] In some embodiments of this utility model, the width of the flank face of the peripheral blade 210 is 0.07D.

[0031] refer to Figure 5 In some embodiments of this utility model, the end cutting edge 220 has an end cutting edge rake angle b1, which is 4° to 8° (including 4° and 8°). It is understood that setting the end cutting edge rake angle b1 to a universal rake angle design of 4° to 8° can be applied to different machining materials and machining conditions, ensuring smooth cutting and avoiding chip accumulation.

[0032] like Figure 5 As shown, in some embodiments, the end-cutting edge 220 has a first clearance angle b2 and a second clearance angle b3. The first clearance angle b2 is 6° to 12° (inclusive), and the second clearance angle b3 is 18° to 24° (inclusive). It is understood that the small clearance angle structure of 6° to 12° for the first clearance angle b2 improves the impact resistance of the end-cutting edge 220, while the large clearance angle structure of 18° to 24° for the second clearance angle b3 reduces bottom surface friction, making the cutting tool of this application suitable for complex working conditions such as deep groove machining.

[0033] In some embodiments of this utility model, the width of the back face of the end blade 220 is 0.08D.

[0034] refer to Figure 1 and Figure 2 In some embodiments of this utility model, a chamfer is provided at the junction of the end cutting edge 220 and the peripheral cutting edge 210. It can be understood that by providing a chamfer at the junction of the end cutting edge 220 and the peripheral cutting edge 210, the cutting impact force is dispersed, the tool tip is prevented from chipping, and the tool life is extended.

[0035] refer to Figure 3In some embodiments of this utility model, the core diameter of the cutter head 200 is 0.55D. It can be understood that by setting the core diameter to 0.55D, the bending strength of the tool is improved, the risk of vibration and breakage is avoided when there is large feed or uneven allowance, and the tool can maintain good rigidity even when the allowance is uneven and the feed is large.

[0036] refer to Figure 1 and Figure 2 In some embodiments of this utility model, the helix angle of the chip removal groove 230 is 40°. It can be understood that by setting the helix angle of the chip removal groove 230 to 40°, the chips can be quickly discharged along the chip removal groove 230, reducing the possibility of chip clogging, and at the same time balancing the distribution of cutting force.

[0037] refer to Figure 1 and Figure 2 In some embodiments of this utility model, both the end cutting edge 220 and the peripheral cutting edge 210 are provided with four edges. It can be understood that the four-edge structure design increases the cutting edge density while ensuring rigidity, improves machining efficiency, and is suitable for roughing and finishing combined processes, making the tool of this application highly versatile.

[0038] refer to Figure 1 and Figure 2 In some embodiments of this utility model, the handle 100 and the blade 200 are integrally formed. It is understood that because the handle 100 and the blade 200 are integrally formed, it facilitates the manufacturing of the cutting tool of this application.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cutting tool, characterized in that, include: Handle; The cutting head has one axial end connected to the shank, and the other axial end of the cutting head is provided with multiple end cutting edges. The multiple end cutting edges are circumferentially spaced around the axis of the cutting head. The circumferential surface of the cutting head is provided with multiple circumferential cutting edges, which correspond one-to-one with and are connected to the end cutting edges. A chip removal groove is formed between any two adjacent circumferential cutting edges. The chip removal groove includes multiple chip removal sections, which are distributed in a fish-scale pattern along the extension direction of the chip removal groove. The diameter of the cutting head is D, and the width of the rake face of the circumferential cutting edge is 0.06D to 0.1D.

2. The cutting tool according to claim 1, characterized in that, The peripheral cutting edge has a peripheral cutting edge rake angle, which is 4° to 8°.

3. A cutting tool according to claim 2, characterized in that, The peripheral blade also has a first rear angle and a second rear angle, wherein the first rear angle is 7° to 11° and the second rear angle is 25° to 30°.

4. A cutting tool according to claim 1, characterized in that, The end blade has an end blade rake angle, which is 4° to 8°.

5. A cutting tool according to claim 4, characterized in that, The end blade has a first rear angle and a second rear angle, the first rear angle being 6° to 12° and the second rear angle being 18° to 24°.

6. A cutting tool according to claim 1, characterized in that, A chamfer is provided at the junction of the end blade and the peripheral blade.

7. A cutting tool according to claim 1, characterized in that, The core diameter of the cutter head is 0.55D.

8. A cutting tool according to claim 1, characterized in that, The helix angle of the chip removal groove is 40°.

9. A cutting tool according to claim 1, characterized in that, Both the end blade and the peripheral blade are provided with four blades.

10. A cutting tool according to claim 1, characterized in that, The handle and the blade are integrally formed.

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