Milling cutter capable of avoiding zero axis speed
By setting an arc groove in the center of the milling cutter to avoid zero axial speed, the problems of increased wear and poor surface quality during the cutting process are solved, and efficient high-quality and long-life machining is achieved.
Patent Information
- Application Number
- CN202422052109.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-22
AI Technical Summary
During the cutting process of conventional milling cutters, the axis speed of the rotation center is zero, resulting in increased tool wear, poor surface quality of the workpiece, and shortened life.
A milling cutter that avoids zero axis speed. By setting arc grooves at the center of the tool rotation to prevent the rotation center from participating in cutting, a tool tip rounded corner structure is used to connect the outer contour line and the horizontal cutting edge line to reduce material deformation and chip breaking difficulty, and reduce local high temperature and high pressure.
It effectively avoids local high temperature and high pressure during cutting, improves the surface quality of the workpiece and tool life, and achieves high-quality and long-life processing effect.
Smart Images
Figure CN223114236U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of milling cutters, and specifically relates to a milling cutter that avoids the axial center speed being zero. Background Technique
[0002] The rotary center of a conventional ball-end mill is a protruding point, and the cutter head of a slab mill is parallel to the cutting plane. In either case, during the cutting process, the rotary radius of its rotary center is zero, that is, the linear cutting speed is zero (that is, the axial center speed is zero and the cutting process of the cutter with the axial center part participating in cutting). This means that the cutting point where the rotary center is located has no linear speed during the cutting process, only the speed in the feed direction. It is equivalent to the cutting point at the rotary center part scratching on the surface of the workpiece to be machined, which will cause increased tool wear, local high temperature at the tip point part, poor surface quality of the workpiece, and shortened tool life. Summary of the Invention
[0003] The purpose of the utility model is to provide a milling cutter that avoids the axial center speed being zero, so as to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] A milling cutter that avoids the axial center speed being zero, comprising:
[0006] A cutter, the cutter is formed by rotating a 360-degree rotation along the rotary center of the cutter by an outer contour line, a horizontal cutting edge line, and a tip fillet. The tip fillet is arranged at the connection between the horizontal cutting edge line and the outer contour line;
[0007] An arc groove, the arc groove is arranged at the rotary center of the cutter, and the arc groove is used to prevent the rotary center of the cutter from scratching the workpiece when the cutter cuts the workpiece.
[0008] Preferably, the arc groove is formed by rotating a 360-degree rotation along the rotary center of the cutter by a sine curve arc surface tangent to the horizontal cutting edge line and a concave arc tangent to the sine curve arc surface.
[0009] Preferably, a first tangent point is formed at the tangent point between the vertex of the sine curve arc surface and the horizontal cutting edge line, and a second tangent point is the tangent point between the sine curve arc surface and the concave arc.
[0010] Preferably, the radius of the cutter is R, the radius of the concave arc is r1, the center of the concave arc is located at the intersection of the rotary center of the cutter and the extension line of the horizontal cutting edge line, and the value range of r1 is [max(0.1, 0.1*R), 3].
[0011] Preferably, the value range of the tip fillet radius is [0, R].
[0012] Preferably, when the nose radius is zero, the tool is an end mill.
[0013] Preferably, when the nose radius is R, the tool is a ball nose end mill.
[0014] Preferably, when the nose radius ranges from (0, R), the tool is a ring cutter.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] The present utility model includes a tool and an arc groove. An outer contour line and a horizontal cutting edge line are provided on the tool. The nose radius is provided at the connection between the horizontal cutting edge line and the outer contour line. The arc groove is provided at the center of rotation of the tool. Through the setting of the arc groove, the linear velocity at the center of rotation of the tool is zero and does not participate in cutting, thereby effectively avoiding problems such as local high temperature and high pressure, poor surface quality, and short tool life during the cutting process, and achieving high-quality and long-life machining from the perspective of the tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic cross-sectional structure view of the tool of Embodiment 1 of the present utility model;
[0018] Figure 2 is a schematic structure view of Embodiment 1 of the present utility model;
[0019] Figure 3 is a schematic structure view of Embodiment 2 of the present utility model;
[0020] Figure 4 is a schematic structure view of Embodiment 3 of the present utility model.
[0021] In the figure: 1, tool; 2, outer contour line; 3, horizontal cutting edge line; 4, nose radius; 5, arc groove; 6, sinusoidal curve surface; 7, concave arc; 8, first tangent point; 9, second tangent point; 10, center of rotation. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] Please refer to Figures 1 to 4 , the present utility model provides a technical solution:
[0024] Embodiment:
[0025] A milling cutter that avoids the spindle speed being zero, comprising:
[0026] Tool 1, which is formed by the outer contour line 2, the horizontal cutting edge line 3 and the tool tip fillet 4 rotating 360 degrees along the rotation center 10 of the tool 1. The tool tip fillet 4 is arranged at the connection of the horizontal cutting edge line 3 and the outer contour line 2. The radius of the tool tip fillet 4 is greater than zero and less than the radius of the tool 1. At this time, the tool 1 is an annular cutter.
[0027] Arc groove 5, which is arranged at the rotation center 10 of the tool 1. The arc groove 5 is used to prevent the rotation center 10 of the tool 1 from scratching the workpiece when the tool 1 cuts the workpiece. The arc groove 5 is formed by the sine curve arc surface 6 tangent to the horizontal cutting edge line 3 and the concave arc 7 tangent to the sine curve arc surface 6 rotating 360 degrees along the rotation center 10 of the tool 1. The structural design of the sine curve arc surface 6 can reduce the material deformation during the cutting process to a certain extent, reduce the chip width, reduce the difficulty of chip breaking, avoid local high temperature and high pressure, thereby improving the cutting efficiency and the service life of the tool 1. The vertex of the sine curve arc surface 6 forms the first tangent point 8 at the tangent point with the horizontal cutting edge line 3. The tangent point of the sine curve arc surface 6 and the concave arc 7 is the second tangent point 9. The radius of the tool 1 is R, and the radius of the concave arc 7 is r1. The center of the concave arc 7 is located at the intersection of the extension line of the rotation center 10 of the tool 1 and the horizontal cutting edge line 3. The value range of r1 is [max(0.1, 0.1*R), 3].
[0028] Embodiment 2: The only structural difference from Embodiment 1 is that the radius of the tool tip fillet 43 is zero. At this time, the tool 1 is an end mill.
[0029] Embodiment 3: The only structural difference from Embodiment 1 is that the radius of the tool tip fillet 43 is equal to the radius of the tool 1. At this time, the tool 1 is a ball end mill.
[0030] Working principle: Through the structural improvement of the head of the tool 1, the linear velocity at the rotation center 10 of the tool 1 is zero and does not participate in cutting, thereby effectively avoiding problems such as local high temperature and high pressure, poor surface quality, and short tool 1 life during the cutting process, and achieving high-quality and long-life machining from the perspective of the tool 1.
[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A milling cutter that avoids a spindle speed of zero, characterized in that, Including: A cutting tool, which is formed by rotating an outer contour line, a horizontal cutting edge line, and a tool tip fillet 360 degrees around the rotation center of the cutting tool. The tool tip fillet is arranged at the connection of the horizontal cutting edge line and the outer contour line; An arc groove, which is arranged at the rotation center of the cutting tool. The arc groove is used to prevent the rotation center of the cutting tool from scratching the workpiece when the cutting tool cuts the workpiece.
2. The milling cutter for avoiding the spindle speed being zero according to claim 1, characterized in that: The arc groove is formed by rotating a sine curve arc surface tangent to the horizontal cutting edge line and a concave arc tangent to the sine curve arc surface 360 degrees around the rotation center of the cutting tool.
3. A milling cutter for avoiding a zero axial velocity according to claim 2, characterized in that: A first tangent point is formed at the tangent point of the vertex of the sine curve arc surface and the horizontal cutting edge line, and a second tangent point is the tangent point of the sine curve arc surface and the concave arc.
4. A milling cutter for avoiding a zero axial velocity according to claim 3, characterized in that: The radius of the cutting tool is R, the radius of the concave arc is r1, the center of the concave arc is located at the intersection of the rotation center of the cutting tool and the extension line of the horizontal cutting edge line, and the value range of r1 is [max(0.1, 0.1*R), 3].
5. A milling cutter for avoiding the spindle speed being zero according to claim 4, characterized in that: The value range of the tool tip fillet radius is [0, R].
6. A milling cutter for avoiding a zero axial speed according to claim 5, characterized in that: When the tool tip fillet radius is zero, the cutting tool is an end mill.
7. A milling cutter for avoiding the spindle speed being zero according to claim 5, characterized in that: When the tool tip fillet radius is R, the cutting tool is a ball nose end mill.
8. A milling cutter for avoiding the axial center speed being zero according to claim 5, characterized in that: When the value range of the tool tip fillet radius is (0, R), the cutting tool is an annular cutter.