CN216462030U

CN216462030U - Double-bottom-edge round nose milling cutter

Info

Publication number: CN216462030U
Application number: CN202122714966.XU
Authority: CN
Inventors: 温金平; 周志平
Original assignee: Dongguan Hamoni Cutting Tools Co ltd
Current assignee: Dongguan Hamoni Cutting Tools Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-05-10
Anticipated expiration: 2031-11-08

Abstract

The utility model relates to a double-bottom-edge round nose milling cutter, which comprises a cutter handle and a cutter head, wherein the cutter handle is connected with the cutter head, the outer peripheral side of the cutter head is provided with a spiral groove, the end part of the cutter head is provided with a plurality of cutting edges with the same structure, the cutting edges are arranged around the circumference of a central shaft of the cutter head, the center of the cutter head is provided with a hollow circle, the inner end point of the hollow circle hollowed cutting edge reaches the central shaft of the cutter head, the bottom of each cutting edge is provided with an inner inclined bottom surface and an outer inclined bottom surface, compared with the prior art, the cutting bottom surface is increased, the cutting strength of the bottom is increased, the hollow circle is not easy to wear, the purposes of prolonging the service life of the cutter and optimizing the surface cutting pattern effect are achieved, and the inner end point of the hollow circle hollowed cutting edge reaches the central shaft of the cutter head, cutting chips in the cutting process can be timely discharged to the spiral groove from the hollow circle, the chip squeezing phenomenon can be avoided, and the cutting efficiency is improved.

Description

Double-bottom-edge round nose milling cutter

Technical Field

The utility model relates to the field of cutters, in particular to a double-bottom-edge round nose milling cutter.

Background

Round nose milling cutter is the difference and is another kind of milling cutter structure of flat-bottom milling cutter, and the cutting edge bottom of conventional round nose cutter only has a face, and cutting strength can only rely on the cutting edge material to guarantee, and the long bottom surface of cutting operation time just is worn and torn easily, causes the work piece more lines of a knife to appear and has reduced the product quality, and the life of cutter also can receive the influence moreover, in addition, current cutter chip removal performance is general, and crowded bits phenomenon can appear occasionally in the waste material bits can not in time discharge.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a double-bottom-edge round nose milling cutter, wherein the cutting edge has a double-surface structure to increase the cutting strength, and the specific technical scheme is as follows:

the utility model provides a two end sword nose rounding milling cutter, includes handle of a knife and tool bit, and the handle of a knife is connected the tool bit, and tool bit periphery side is equipped with the helicla flute, and the tool bit tip is equipped with the cutting edge that a plurality of structures are the same, and the cutting edge is arranged around tool bit center pin circumference, tool bit center department is equipped with hollow circle, and hollow circle excavates the part of the inboard extreme point of cutting edge to tool bit center pin department, and every cutting edge bottom is equipped with interior slope bottom surface and outer slope bottom surface, and interior slope bottom surface is inboard and outer slope bottom surface is in the outside, and the centripetal angle of interior slope bottom surface is greater than the centripetal angle of outer slope bottom surface.

In a preferred embodiment of the present invention, there are 4 cutting edges, and the included angle between two adjacent cutting edges is 90 °.

In a preferred embodiment of the present invention, the edge line of the blade coincides with the longitudinal center line and the transverse center line of the blade.

The utility model has the beneficial effects that: every cutting edge bottom is equipped with interior slope bottom surface and outer slope bottom surface, has increased the cutting bottom surface for prior art, makes bottom cutting strength obtain increasing, thereby difficult wearing and tearing reach the purpose of extension cutter life-span, optimization surface knurl effect, and the part of hollow circle cutting edge inboard extreme point to tool bit center pin department of hollowing out in addition, and the cutting bits in the cutting course can be followed hollow circle and in time arranged helicla flute department, can not take place crowded bits phenomenon, improves cutting efficiency.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic view of the inner and outer sloped floors of the present invention;

fig. 4 is an enlarged schematic view of the inward sloping bottom surface and the outward sloping bottom surface at a in fig. 3 toward the heart angle.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1 to 4, a double-bottom-edge round nose milling cutter comprises a cutter handle 1 and a cutter head 2, wherein the cutter handle 1 is connected with the cutter head 2, a spiral groove 3 is formed in the outer peripheral side of the cutter head 2, a plurality of blades 4 with the same structure are arranged at the end part of the cutter head 2, the blades 4 are arranged around the circumference of a central shaft of the cutter head, a hollow circle 5 is arranged at the center of the cutter head 2, the hollow circle 5 hollows the part from the inner end point of each blade 4 to the central shaft of the cutter head, an inner inclined bottom surface 6 and an outer inclined bottom surface 7 are arranged at the bottom of each blade 4, the inner inclined bottom surface 6 is arranged on the inner side, the outer inclined bottom surface 7 is arranged on the outer side, the centripetal angle a1 of the inner inclined bottom surface 6 is larger than the centripetal angle a2 of the outer inclined bottom surface 7, and the included angle between the inclined bottom surface and a horizontal plane passing through the central shaft of the cutter head is a centripetal angle, and the centripetal angle determines the inclination degree.

Specifically, there are 4 cutting edges 4, the included angle between two adjacent cutting edges 4 is 90 °, the side lines of the cutting edges 4 coincide with the longitudinal central line and the transverse central line of the cutter head, that is, the side lines of the upper and lower cutting edges 4 coincide with the longitudinal central line of the cutter head, and the side lines of the left and right cutting edges 4 coincide with the transverse central line of the cutter head.

In conclusion, the double-bottom-edge round nose milling cutter has reasonable structural design, increases the cutting bottom surface, increases the cutting strength of the bottom, is not easy to wear, and achieves the purposes of prolonging the service life of the cutter and optimizing the surface cutting pattern effect.

The above description is for the purpose of describing the utility model in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments of the utility model are limited to those described herein, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a two end sword nose circle milling cutter, includes handle of a knife and tool bit, and the tool bit is connected to the handle of a knife, and tool bit periphery side is equipped with the helicla flute, and the tool bit tip is equipped with the same cutting edge of a plurality of structures, and the cutting edge is arranged around tool bit center pin circumference, its characterized in that: the cutter head is characterized in that a hollow circle is arranged at the center of the cutter head, the hollow circle hollows out the part from the inner side endpoint of the cutting edge to the central shaft of the cutter head, the bottom of each cutting edge is provided with an inner inclined bottom surface and an outer inclined bottom surface, the inner inclined bottom surface is arranged on the inner side, the outer inclined bottom surface is arranged on the outer side, and the centripetal angle of the inner inclined bottom surface is larger than that of the outer inclined bottom surface.

2. A double bottom edge nose mill as claimed in claim 1, wherein: the cutting edge has 4, and the contained angle between two adjacent cutting edges is 90.

3. A double bottom edge nose mill as claimed in claim 2, wherein: the side line of the cutting edge is superposed with the longitudinal central line and the transverse central line of the cutter head.