CN216575743U

CN216575743U - Double-edge ball-end milling cutter

Info

Publication number: CN216575743U
Application number: CN202122549238.8U
Authority: CN
Inventors: 杨炳辉; 胡新民; 欧日阳
Original assignee: Dongguan Lingyi Precision Metal Co ltd
Current assignee: Dongguan Lingyi Precision Metal Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-05-24
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses a double-edge ball-end milling cutter which comprises a coaxial cutter handle, a cutter neck and a cylindrical cutter head, wherein two cutting edges are symmetrically formed on the cutter head, the two cutting edges spirally surround the cutter head, and the top ends of the two cutting edges extend to the upper end part of the cutter head and are intersected in an arc at the central axis of the cutter head; two chip grooves are formed between the two cutting edges and extend to the cutter neck. In the embodiment, the third surface is additionally arranged on each cutting edge, so that the actual cutting diameter of the cutter can be reduced, the cutting linear velocity is reduced, the cutting power and the cutting torque during cutting are reduced, the purposes of reducing the axial stress of the cutter and reducing the vibration of the cutter are achieved, the cutting efficiency of the cutter is improved while the processing quality is ensured, and the service life of the cutter is prolonged; through connecting two cutting edges 31 into an integrated structure for the entrance angle of cutting edge is the continuous variation state, can guarantee that the cutting state is more steady, and the product surface does not have or only has less cutting trace, and the smooth finish of product is higher.

Description

Double-edge ball-end milling cutter

Technical Field

The utility model relates to the technical field of machining tools, in particular to a double-edge ball-end milling cutter.

Background

In machining production, rough machining and finish machining are roughly divided, wherein a cutter in the rough machining has deep tool depth and high cutting efficiency, but a cutter body needs to bear large axial force, the cutter is seriously worn, the vibration amplitude is large, and the cutting precision is not high; in finish machining, the tool has shallow tool cutting, low cutting efficiency, small tool body vibration, high cutting precision and difficult tool breakage. Therefore, in view of production costs, different cutting tools are generally used for rough machining and finish machining.

In actual production, when some products with high precision requirements are machined, in order to avoid the influence of large vibration on the product quality, a large amount of working hours are consumed in a finishing process, the production efficiency is low, and the machining cost is high.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the double-edge ball-end milling cutter which can be used in semi-finishing production, can reduce the axial stress of a cutter during cutting so as to reduce the vibration of the cutter, can improve the cutting efficiency of the cutter while ensuring the processing quality, prolongs the service life of the cutter, and ensures that the cutting state is more stable, the surface of a product has no or only shallow cutting traces, and the smoothness of the product is higher.

In order to solve the technical problems, the utility model adopts a technical scheme as follows:

a double-edge ball-end milling cutter comprises a coaxial cutter handle, a cutter neck and a cylindrical cutter head, wherein two cutting edges are symmetrically formed on the cutter head, the two cutting edges spirally surround the cutter head, and the spiral angle of the two cutting edges is between 28 and 32 degrees; the top end parts of the two cutting edges extend to the upper end part of the cutter head and are intersected in an arc at the central axis of the cutter head; two chip grooves are formed between the two cutting edges, and both the chip grooves extend to the cutter neck.

As a further elaboration of the above technical solution:

in the above technical solution, each of the cutting edges is provided with an inclined land, and both sides of the land are respectively formed with a first front surface and a first rear surface, and are respectively formed with a first rake angle, a first relief angle and a second relief angle: the first front angle is between 6 DEG and 10 DEG, the first back angle is between 10 DEG and 14 DEG, and the second back angle is between 20 DEG and 25 deg.

In the above technical solution, the diameter of the tool bit is between 0.76mm and 0.82mm, the edge width of each land is between 0.05mm and 0.09mm, and the maximum distance between each first front face and the first rear face is between 0.15mm and 0.22 mm.

In the technical scheme, the groove depth of each chip groove is between 0.13mm and 0.27 mm.

In the above technical solution, a second relief surface for cutting off a highest point on the cutting edge is further formed beside the first relief surface.

In the above technical solution, the first front surface, the first rear surface and the second rear surface are all connected with the chip groove; the included angle between the first front face and the chip groove is 95-115 degrees.

Compared with the prior art, the utility model has the beneficial effects that: the utility model can be used in semi-finishing production, and can reduce the actual cutting diameter of the cutter, reduce the cutting linear velocity, reduce the cutting power and the cutting torque during cutting and processing by adding the third surface on each cutting edge, thereby achieving the purposes of reducing the axial stress of the cutter and reducing the vibration of the cutter, improving the cutting efficiency of the cutter while ensuring the processing quality, and prolonging the service life of the cutter; through connecting two cutting edge circular arcs into an organic whole structure for the entrance angle of cutting edge is the continuous variation state, can guarantee that the cutting state is more steady, and the product surface does not have or only has less cutting trace, and the smooth finish of product is higher.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of a cutting head according to the present invention;

fig. 3 is a schematic view of the structure of the cutting edge in the present invention.

In the figure: 10. a knife handle; 20. a cutter neck; 30. a cutter head; 31. a cutting edge; 1. a first front face; 2. a margin; 3. a first rear face; 4. a second rear face; a. a first rake angle; b. a first relief angle; c. a second relief angle; D. a diameter; d1, edge width; d2, maximum distance; H. the groove depth; e. an included angle; f. a helix angle; 40. a chip groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a number" or "a plurality" is two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral connections; 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 application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-3, a double-edged ball-end milling cutter comprises a coaxial shank 10, a neck 20 and a cylindrical cutting head 30, wherein two cutting edges 31 are symmetrically formed on the cutting head 30, the two cutting edges 31 spirally surround the cutting head 30, and the helix angle f of the two cutting edges is between 28 ° and 32 °; the top ends of the two cutting edges 31 extend to the upper end of the cutter head 30 and are intersected in an arc at the central axis of the cutter head 30; two rows of flutes 40 are formed between the cutting edges 30, and the flutes 40 extend to the shank 20.

Further, each cutting edge 31 is provided with an inclined land 1, and the land 1 is formed with a first rake face 2 and a first relief face 3 on both sides thereof, respectively, and is formed with a first rake angle a, a first relief angle b, and a second relief angle c, respectively: the first front angle a is between 6 ° and 10 °, the first back angle b is between 10 ° and 14 °, and the second back angle c is between 20 ° and 25 °.

As a preferred embodiment, in the present embodiment, the helix angle f is 30 °, the first rake angle a is 8 °, the first relief angle b is 12 °, and the second relief angle c is 23 °.

Further, the diameter D of the cutting head 30 is between 0.76mm and 0.82mm, the edge width D1 of each margin 1 is between 0.05mm and 0.09mm, and the maximum distance D2 of each first front face 2 and first rear face 3 is between 0.15mm and 0.22 mm.

As a preferred embodiment, in this embodiment, the edge width d1 is 0.08mm, and the maximum distance d2 between each first front face 2 and the first rear face 3 is 0.18 mm; in addition, the depth of the cutting edge 31 measured on each first face 1 was 0.04 mm.

Further, the flute depth H of each flute 40 is between 0.13mm and 0.27 mm.

Further, the first relief surface 3 is flanked by a second relief surface 4 for cutting off the highest point on the cutting edge 31.

Further, the first front face 2, the first rear face 3 and the second rear face 4 are all connected with the chip grooves 40; the included angle e between the first front face 1 and the chip groove is between 95 and 115 degrees.

As a preferred embodiment, in this embodiment, the angle e between the first front face 1 and the flute is 110 °.

The ball end mill in the embodiment is mainly applied to semi-finishing of aluminum products, the actual cutting diameter of the cutter can be reduced by additionally arranging the third surface 4 on each cutting edge 31, the cutting linear speed is reduced, the cutting power and the cutting torque during cutting and machining are reduced, the purposes of reducing the axial stress of the cutter and reducing the vibration of the cutter are achieved, the cutting efficiency of the cutter is improved while the machining quality is ensured, and the service life of the cutter is prolonged; the two cutting edges 31 are connected into an integral structure in an arc manner, so that the cutting angle of the cutting edge 31 is in a continuous change state, the cutting state is more stable, no or only shallow cutting traces exist on the surface of a product, and the smoothness of the product is higher.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A double-edge ball-end milling cutter is characterized by comprising a coaxial cutter handle, a cutter neck and a cylindrical cutter head, wherein two cutting edges are symmetrically formed on the cutter head, spirally surround the cutter head, and the spiral angle of the two cutting edges is between 28 and 32 degrees; the top end parts of the two cutting edges extend to the upper end part of the cutter head and are intersected in an arc at the central axis of the cutter head; two chip grooves are formed between the two cutting edges, and both the chip grooves extend to the cutter neck.

2. A double-edged ball nose milling cutter as claimed in claim 1, wherein each of the cutting edges is provided with an inclined land, and the lands are respectively formed at both sides thereof with first front and rear faces, and respectively formed with first and second rake, relief and relief angles: the first front angle is between 6 DEG and 10 DEG, the first back angle is between 10 DEG and 14 DEG, and the second back angle is between 20 DEG and 25 deg.

3. A double-edged ball nose milling cutter as claimed in claim 2, wherein the diameter of the cutting head is between 0.76mm and 0.82mm, the edge width of each land is between 0.05mm and 0.09mm, and the maximum distance between each first front face and the first rear face is between 0.15mm and 0.22 mm.

4. A double-edged ball nose milling cutter as claimed in claim 3, wherein the flute depth of each flute is between 0.13mm and 0.27 mm.

5. A double-edged ball nose milling cutter as claimed in claim 2, wherein the first relief surface is flanked by a second relief surface for cutting off a highest point on the cutting edge.

6. A double-edged ball nose milling cutter as claimed in claim 5, wherein the first front face, the first rear face and the second rear face are each contiguous with the flute; the included angle between the first front face and the chip groove is 95-115 degrees.