Milling tool for ball head with taper
By designing a taper ball-end milling tool and setting a ball-end cutting edge and a chip groove, the problems of chip blockage and tool breakage in the existing technology are solved, the stability and efficiency of the cutting process are achieved, and the rigidity and cutting ability of the tool are enhanced.
Patent Information
- Application Number
- CN202422477049.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing tapered ball cutters have problems during machining, such as chip blockage, chip blockage caused by tool overhang, low machining efficiency, chip blockage and blade breakage, making it difficult to achieve high-speed milling of curved surface finishing.
A milling tool with a tapered ball head, which is provided with a cutting part and a clamping part, including a cutting part, a plurality of ball head cutting edges and corresponding chip grooves; the ball head cutting edges and corresponding chip grooves; the ball head cutting edges include lateral cutting edges and bottom cutting edges, the lateral cutting edges include lateral rake faces, lateral flank faces and lateral main cutting edges, the edge band at the intersection of the chip groove and the lateral flank faces is the lateral main cutting edge, the bottom cutting edge includes a bottom rake face, a bottom flank face and a bottom main cutting edge, the edge band at the intersection of the bottom rake face and the bottom flank face is the bottom main cutting edge, the width of the lateral flank face is 0.1-0.4 mm, and the back angle is 8°-10°; the end of the chip groove extends to the clamping part along the helix angle, and the length of the auxiliary chip groove is 5-6 mm.
It achieves rapid chip discharge during the machining process, avoids chip blockage and tool breakage, improves machining efficiency and stability, enhances tool rigidity and cutting ability, and reduces cutting load.
Smart Images
Figure CN223368298U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing, in particular to a milling cutter with a taper ball head. Background Art
[0002] The tapered ball cutter combines the features of both a conical cutter and a ball cutter. It possesses the characteristics of a conical cutter, with a smaller tip; and the characteristics of a ball cutter, capable of carving finer curved surfaces. This makes the tapered ball cutter widely used in applications requiring fine surface processing, such as precision machining of automotive parts, aerospace components, and medical devices.
[0003] Tapered ball cutters can not only achieve fine finishing of small planes, but also handle complex curved surface processing, improving processing efficiency and flexibility. As the taper ball cutter has a certain taper design suitable for high-speed milling, it can efficiently process workpieces and improve processing efficiency.
[0004] Tapered ball cutters are suitable for milling a variety of materials, including mold steel, cast iron, carbon steel, alloy steel, tool steel and general iron materials, and are widely used in the processing of various curved surfaces and circular grooves.
[0005] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content
[0006] In view of the deficiencies in the prior art, the utility model provides a milling cutter with a tapered ball head, which solves the existing problems.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a milling tool with a tapered ball head, made of cemented carbide, comprising a cutting part and a clamping part, wherein the cutting part and the clamping part are of an integral structure, characterized in that the cutting part is provided with a plurality of ball head chip edges and corresponding chip grooves; the ball head chip edges include a lateral cutting edge and a bottom cutting edge, the lateral cutting edge includes a lateral rake face, a lateral flank face and a lateral main cutting edge, and the edge band at the intersection of the chip groove and the lateral flank face is a lateral main cutting edge. Cutting edge, the lateral flank surface includes a first lateral flank surface and a second lateral flank surface; the bottom cutting edge includes a bottom rake surface, a bottom flank surface and a bottom main cutting edge, the edge band at the intersection of the bottom rake surface and the bottom flank surface is the bottom main cutting edge, the bottom flank surface includes a first bottom flank surface and a second bottom flank surface; the width of the first lateral flank surface is 0.1~0.4mm, and the back angle is 8°~10°; the end of the chip groove extends to the clamping part along the helix angle, and the length of the auxiliary chip groove is 5~6mm.
[0008] As a preferred technical solution of the present invention, the width of the first lateral relief surface is 0.1-0.4 mm, the front end is small and the rear end is large, and the relief angle is 9°.
[0009] As a preferred technical solution of the present invention, the width of the first bottom flank surface is 0.1-0.15 mm, and the flank angle is 8°-10°.
[0010] As a preferred technical solution of the present invention, the width of the first bottom flank surface is 0.12 mm, and the flank angle is 9°.
[0011] As a preferred technical solution of the present invention, the taper angle of the milling tool is 30°, and the chip groove is an R-shaped parabolic shape.
[0012] As a preferred technical solution of the present invention, the angles of the bottom cutting edge are to And the and The angles are the same.
[0013] As a preferred technical solution of the present utility model, the run-out value of the cutting part is ≤0.003 μm, and the run-out value of the clamping part is ≤0.002 μm.
[0014] Compared with the prior art, the present invention provides a milling tool with a tapered ball head, which has the following beneficial effects:
[0015] 1. A milling tool with a tapered ball head has a compact structure by providing a cutting portion and a clamping portion. The tool base material is made of ultra-fine cemented carbide. This type of tool has good rigidity and can effectively reduce the cutting load and improve processing efficiency when processing materials. The length of the lateral cutting edge is appropriately shortened to achieve the purpose of shortening the tool overhang and enhancing the rigidity of the tool. By setting the runout value of the cutting portion to ≤0.003μm and the runout value of the clamping portion to ≤0.002μm, the stable processing state and processing effect can be maintained.
[0016] 2. This taper ball-end milling tool, by providing a first lateral flank and a first bottom flank, and by setting the width d of the first lateral flank to 0.1-0.4 mm and the back angle α to 9°, can effectively enhance the strength of the lateral cutting edge, allowing the side wall cutting edge to fully engage the edge, making the cutting tool more agile and stable when cutting a workpiece. By setting the width of the first bottom flank to 0.12 mm and the back angle β to 9°, the strength of the bottom cutting edge can be effectively enhanced, allowing the bottom cutting edge to fully engage the edge, making the cutting tool more agile and stable when cutting a workpiece.
[0017] 3. This milling tool with a tapered ball head, by setting the taper angle, chip groove and bottom cutting edge, by setting the taper angle to 30°, can ensure the smooth cutting process, forcing the chips to be forcefully broken during the cutting process, the chip groove is in the shape of an R-shaped parabola, ensuring the rapid discharge of chips during the cutting process, avoiding the tool breakage caused by chip blockage, and preventing the scratches on the machined surface caused by flying chips, so that the cutting process is smooth and withstands less vibration. The chip groove can effectively assist the milling tool in rapid chip removal, and the angle of the bottom cutting edge is the same, which can ensure effective vibration reduction during the milling process and further enhance the stability of the milling tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the structure of the milling cutter of the utility model;
[0019] Figure 2 For this utility model Figure 1 The enlarged view of the rear angle of the ball head is shown;
[0020] Figure 3 This is a front view of the milling cutter of the utility model;
[0021] Figure 4 For this utility model Figure 3 The enlarged view of the part shown;
[0022] Figure 5 This is a top view of the milling cutter of the present utility model.
[0023] In the figure: 1. Cutting part; 2. Clamping part; 3. Ball-end chip edge; 4. Lateral rake face; 5. Lateral cutting edge; 52. Lateral flank face; 53. Lateral main cutting edge; 521. First lateral flank face; 522. Second lateral flank face; 6. Bottom cutting edge; 621. First bottom flank face; 622. Second bottom flank face; 8. Taper angle. DETAILED DESCRIPTION
[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] Example 1
[0027] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a milling tool with a tapered ball head, made of cemented carbide, including a cutting part 1 and a clamping part 2, the cutting part 1 and the clamping part 2 are an integral structure, the clamping part 2 is in the form of a cylinder, and is used to cooperate with the inner hole of the machine tool spindle tool holder, characterized in that the cutting part 1 is provided with a plurality of ball head chip edges 3 and corresponding chip grooves; while providing sufficient cutting force, it is prevented that the chips are entangled in the milling or block the orifice, causing the tool to break or break in the part, the ball head chip edge 3 includes a side cutting edge 5 and a bottom cutting edge 6, the side cutting edge 5 includes a side rake face 4 , lateral flank surface 52 and lateral main cutting edge 53, the edge band at the intersection of the chip groove and the lateral flank surface 52 is the lateral main cutting edge 53, the lateral flank surface 52 includes a first lateral flank surface 521 and a second lateral flank surface 522; the bottom cutting edge 6 includes a bottom rake surface 61, a bottom flank surface 62 and a bottom main cutting edge 63, the edge band at the intersection of the bottom rake surface 61 and the bottom flank surface 62 is the bottom main cutting edge 63, the bottom flank surface 62 includes a first bottom flank surface 621 and a second bottom flank surface 622, the run-out value of the cutting part 1 is ≤0.003μm, and the run-out value of the clamping part 2 is ≤0.002μm.
[0028] In this embodiment, by setting the cutting part 1 and the clamping part 2 as an integral structure, the integral milling tool has a compact structure, and the tool base material is selected from ultra-fine cemented carbide. This type of tool has good rigidity and can effectively reduce the cutting load when processing materials, improve processing efficiency, and appropriately shorten the length of the lateral cutting edge 5 to achieve the purpose of shortening the tool overhang and enhancing the rigidity of the tool. By setting the runout value of the cutting part 1 to ≤0.003μm and the runout value of the clamping part 2 to ≤0.002μm, the stability of the processing state and the processing effect can be maintained.
[0029] Example 2
[0030] like Figure 1-Figure 5 As shown, the width of the first lateral back blade 521 is 0.1~0.4mm, the back angle is 8°~10°, the width of the first lateral back blade 521 is 0.1~0.4mm, the front end is small and the rear end is large, the back angle is 9°, the end of the chip groove extends along the helix angle to the clamping part 2, the length of the auxiliary chip groove is 5~6mm, the width of the first bottom back blade 621 is 0.1~0.15mm, the back angle is 8°~10°, the width of the first bottom back blade 621 is 0.12mm, and the back angle is 9°.
[0031] In this embodiment, when machining the sidewall of a workpiece, the first lateral relief face 521 plays the primary cutting role. By setting the width d of the first lateral relief face 521 to 0.1-0.4 mm and the relief angle α to 9°, the strength of the lateral cutting edge 5 can be effectively enhanced, allowing the sidewall cutting edge 5 to fully engage the edge, making the cutting tool more agile and stable when cutting the workpiece. When machining the bottom of the workpiece, the first bottom relief face 621 plays the primary cutting role. By setting the width of the first bottom relief face 621 to 0.12 mm and the relief angle β to 9°, the strength of the bottom cutting edge 6 can be effectively enhanced, allowing the bottom cutting edge 6 to fully engage the edge, making the cutting tool more agile and stable when cutting the workpiece.
[0032] Example 3
[0033] like Figure 1-Figure 5 As shown, the taper angle 8 of the milling tool is 30°, the chip groove is an R-shaped parabolic shape, and the angles of the bottom cutting edge 6 are to and and The angles are the same.
[0034] In this embodiment, by setting the taper angle to 30°, the cutting process can be ensured to proceed smoothly, forcing the chips to be forcefully broken during the cutting process. The chip groove is in the shape of an R-shaped parabolic shape, which ensures the rapid discharge of chips during the cutting process, avoids the tool breakage due to chip blockage, and prevents the scratching of the machined surface due to flying chips, so that the cutting process is smooth and withstands less vibration. The chip groove can effectively assist the milling tool to quickly remove chips, and the angle of the bottom cutting edge 6 is the same, which can ensure effective vibration reduction during the milling process and further enhance the stability of the milling tool.
[0035] The working principle of this embodiment: the integral milling tool has a compact structure, and the tool base material is made of ultra-fine carbide. This type of tool has good rigidity and can effectively reduce the cutting load when processing materials, thereby improving processing efficiency. The clamping part 2 is in the form of a cylinder, which is used to cooperate with the inner hole of the machine tool spindle clamp. When processing the side wall of the workpiece, the first lateral back tool face 521 plays a major cutting role. By setting the width d of the first lateral back tool face 521 to 0.1~0.4mm and the back angle α to 9°, the strength of the lateral cutting edge 5 can be effectively enhanced, so that the side wall cutting edge 5 can fully engage the edge, and the cutting tool can cut the workpiece more lightly and stably. When processing the bottom of the workpiece, the first bottom back blade face 621 plays a major cutting role. By setting the width of the first bottom back blade face to 0.12mm and the back angle β to 9°, the strength of the bottom cutting edge 6 can be effectively enhanced, so that the bottom cutting edge 6 can fully engage the edge, and the cutting tool can cut the workpiece more lightly and stably. In order to ensure the smooth progress of the cutting process, a reasonable chip groove and taper angle must be designed to force the chips to break forcefully during the cutting process. By setting the taper angle to 30°, the cutting process can be ensured to proceed smoothly, forcing the chips to break forcefully during the cutting process. The shape of the chip groove is an R-shaped parabolic shape, which ensures the rapid discharge of chips during the cutting process, avoids tool breakage due to chip blockage, and prevents scratches on the machined surface caused by flying chips, so that the cutting process is smooth and withstands less vibration. The chip groove can effectively assist the milling tool in rapid chip removal. The length of the lateral cutting edge 5 is appropriately shortened to shorten the tool overhang and enhance the rigidity of the tool. The angle of the bottom cutting edge 6 is the same, which can ensure effective vibration reduction during the milling process. By setting the run-out value of the cutting part 1 to ≤0.003μm and the run-out value of the clamping part 2 to ≤0.002μm, the stability of the processing state and the processing effect can be maintained.
[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A milling tool with a tapered ball head, made of cemented carbide, comprising a cutting part (1) and a clamping part (2), wherein the cutting part (1) and the clamping part (2) are of an integral structure, characterized in that: The cutting portion (1) is provided with a plurality of ball-end chip cutting edges (3) and corresponding chip grooves; the ball-end chip cutting edges (3) include a lateral cutting edge (5) and a bottom cutting edge (6); the lateral cutting edge (5) includes a lateral rake face (4), a lateral flank face (52) and a lateral main cutting edge (53); the edge band at the intersection of the chip groove and the lateral flank face (52) is the lateral main cutting edge (53); the lateral flank face (52) includes a first lateral flank face (521) and a second lateral flank face (522); the bottom cutting edge (6) The invention comprises a bottom rake face (61), a bottom flank face (62) and a bottom main cutting edge (63); the edge band at the intersection of the bottom rake face (61) and the bottom flank face (62) is the bottom main cutting edge (63); the bottom flank face (62) comprises a first bottom flank face (621) and a second bottom flank face (622); the width of the first lateral flank face (521) is 0.1 to 0.4 mm, and the back angle is 8° to 10°; the end of the chip groove extends to the clamping part (2) along the helix angle, and the length of the auxiliary chip groove is 5 to 6 mm.
2. The milling tool with a tapered ball head according to claim 1, characterized in that: The first lateral relief surface (521) has a width of 0.1-0.4 mm, a small front end and a large rear end, and a relief angle of 9°.
3. The milling tool with a tapered ball head according to claim 1, characterized in that: The width of the first bottom flank surface (621) is 0.1-0.15 mm, and the flank angle is 8°-10°.
4. The milling tool with a tapered ball head according to claim 3, characterized in that: The width of the first bottom flank surface (621) is 0.12 mm, and the flank angle is 9°.
5. The milling tool with a tapered ball head according to claim 1, characterized in that: The taper angle (8) of the milling tool is 30°, and the chip removal groove is in an R-shaped parabolic shape.
6. The milling tool with a tapered ball head according to claim 1, characterized in that: The angles of the bottom cutting edge (6) are to And the and The angles are the same.
7. The milling tool with a tapered ball head according to claim 1, characterized in that: The runout value of the cutting part (1) is ≤0.003 μm, and the runout value of the clamping part (2) is ≤0.002 μm.