CN109262038B - Multifunctional ball head milling cutter - Google Patents
Multifunctional ball head milling cutter Download PDFInfo
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- CN109262038B CN109262038B CN201811267986.3A CN201811267986A CN109262038B CN 109262038 B CN109262038 B CN 109262038B CN 201811267986 A CN201811267986 A CN 201811267986A CN 109262038 B CN109262038 B CN 109262038B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
- B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/08—Rake or top surfaces
- B23C2200/088—Rake or top surfaces spherical
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Abstract
The invention discloses a multifunctional ball end milling cutter, which comprises a cutting part, a loading and unloading part and a connecting part for the cutting part and the loading and unloading part, wherein the cutting part comprises an inner ball cutting edge and at least one pair of outer ball cutting edges, the inner ball cutting edge is intersected with a central shaft and is rotationally symmetrical about the central shaft, two outer ball cutting edges in each pair are rotationally symmetrical about the central shaft, a radial distance is formed between each outer ball cutting edge and the central shaft, a spherical surface formed by the inner ball cutting edge rotating about the central shaft is intersected with a spherical surface formed by the outer ball cutting edges rotating about the central shaft, the spherical radius of the inner ball cutting edge is R, and the spherical radius of each: r is more than or equal to 5R and less than or equal to 15R. The radius of the cutting spherical surface of the inner spherical cutting edge is far larger than that of the cutting spherical surface of the outer spherical cutting edge, and when the milling cutter is used for cavity type large-feed cutting or flat surface profile milling, the radial load is low, and the cutting efficiency is high.
Description
Technical Field
The invention relates to a metal cutting tool, in particular to a multifunctional ball-end milling cutter.
Background
The general integral hard alloy ball end milling cutter is mainly used for processing profiling, cavity and ball groove, the cutting part of the general ball end milling cutter mainly comprises a ball cutting edge or a ball cutting edge and a column cutting edge, and in order to ensure the integrity of the profiling processing capability of the ball cutting edge, when at least one ball cutting edge rotates around a central shaft for cutting, the cutting spherical surface is not smaller than a half spherical surface. In order to ensure that all cutting edges of the ball end mill feed uniformly and cut stably, a single ball cutting edge of the ball end mill adopts a continuous cutting edge structure, and all ball cutting edges on the ball end mill are distributed on the same spherical surface which takes a central shaft as a center and has constant diameter and complete coincidence. Although the ball end mill is simple in structure, the single ball cutting edge has constant structural parameters such as a rake angle, a relief angle and the like due to process limitation. The main cutting part of the ball end mill is a ball end cutting edge part, the ball end cutting edge starts from a central shaft with a diameter of zero and ends at a column cutting edge with a maximum diameter, the cutting speed difference of each part of the ball end cutting edge is large, particularly the central cutting linear speed is basically zero, the cutting edge in a central area is quickly worn and easily breaks during cutting, the strength of the central cutting edge can be improved by optimizing parameters such as a front angle and a rear angle, but the problems of high cutting force, high vibration, poor quality of a processed surface and the like can be caused, the overall performance of the ball end mill is seriously influenced, and the failure of the central cutting edge becomes the main failure form of the ball end mill. Therefore, the cutting spherical surface diameter of the ball cutting edge of the common ball end mill around the center is equal to the cutting edge diameter of the ball end mill, in order to reduce the surface residual amount and ensure the surface quality, only low cutting feed can be adopted during each processing, and the cutting efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the multifunctional ball-end milling cutter with low radial load and high cutting efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a multifunctional ball end mill, includes cutting part, loading and unloading portion and is used for connecting the connecting portion of cutting part and loading and unloading portion, the cutting part has the center pin, the cutting part includes an interior ball cutting edge and at least a pair of outer ball cutting edge, interior ball cutting edge intersects with the center pin and about center pin rotational symmetry, every two outer ball cutting edges in outer ball cutting edge are about center pin rotational symmetry, and have certain radial interval between outer ball cutting edge and the center pin, connecting edge has between interior ball cutting edge both ends and the connecting portion, form the chip groove between outer ball cutting edge and adjacent connecting edge or the outer ball cutting edge, the sphere that interior ball cutting edge formed about the center pin rotation intersects with the sphere that outer ball cutting edge formed about the center pin rotation, the sphere radius of interior ball cutting edge is R, the sphere radius of outer ball cutting edge is R, satisfies the following conditions: r is more than or equal to 5R and less than or equal to 15R.
As a further improvement of the above technical solution, preferably, the vertex of the spherical surface formed by the rotation of the inner ball cutting edge is P1, the vertex of the spherical surface formed by the rotation of the connecting line between the two outer ball cutting edges in each pair of outer ball cutting edges is P2, the vertex of the spherical surface formed by the rotation of the connecting line between the two outer ball cutting edges is P1 and P2 are both on the central axis, and the distance between the two is H, so that: h is more than or equal to 0.05R and less than or equal to 0.3R.
As a further improvement of the above-described aspect, it is preferable that the diameter of the connecting portion is D, and the shortest distance between the outer spherical cutting edge and the central axis in the radial direction is L1, and that: l1 is more than or equal to 0.05D and less than or equal to 0.15D.
As a further improvement of the technical proposal, the relief angles of the inner ball cutting edge and the outer ball cutting edge are β ', which satisfies the requirement that the clearance angle is equal to or less than 3 degrees and equal to or less than β' - β and equal to or less than 8 degrees.
As a further improvement of the above technical means, it is preferable that the rake angles of the inner ball cutting edge and the outer ball cutting edge are γ, γ', respectively, and satisfy: 2 degrees and gamma-gamma' are not more than 5 degrees.
As a further improvement of the above-described aspect, it is preferable that an outer cylindrical cutting edge is provided between the outer spherical cutting edge and the connecting portion, and the outer cylindrical cutting edge is on a cylindrical surface having a center axis as a rotation center.
As a further improvement of the above technical means, it is preferable that a connecting edge is provided between both ends of the inner spherical cutting edge and the connecting portion, and a chip groove is formed between the connecting edge and the adjacent outer spherical cutting edge or between the adjacent two outer spherical cutting edges.
As a further improvement of the above technical solution, preferably, the connecting edge includes a tapered cutting edge, and the tapered cutting edge does not participate in milling when rotating.
As a further improvement of the above technical solution, preferably, the vertex angle of the conical surface of the conical cutting edge, which takes the central axis as the rotation center, is α, and satisfies that 30 degrees is equal to or less than α degrees is equal to or less than 60 degrees.
As a further improvement of the above technical means, it is preferable that the connecting blade further includes an inner cylindrical cutting edge located between the tapered cutting edge and the connecting portion, the inner cylindrical cutting edge is on a cylindrical surface having a center axis as a rotation center, and the tapered cutting edge and the inner spherical cutting edge have a smoothly-transiting corner cutting edge therebetween.
As a further improvement of the above technical solution, preferably, the pair of outer spherical cutting edges is provided, the two outer spherical cutting edges and the two connecting edges are circumferentially and uniformly distributed, and a chip groove is formed between each outer spherical cutting edge and the adjacent connecting edge.
As a further improvement of the above technical means, it is preferable that the connecting edge and the outer spherical cutting edge have the same structure and are rotationally symmetrical about the central axis.
As a further improvement of the above technical means, it is preferable that the connecting edge and the inner ball cutting edge have a transition cutting edge with a smooth transition therebetween.
As a further improvement of the above technical solution, preferably, the cutting portion is detachably connected to the connecting portion.
In order to solve the technical problem, the invention adopts the following other technical scheme:
the utility model provides a multifunctional milling cutter, includes cutting part, loading and unloading portion and is used for connecting the connecting portion of cutting part and loading and unloading portion, the cutting part has the center pin, the cutting part includes interior ball cutting edge and outer ball cutting edge, interior ball cutting edge intersects with the center pin, and the intersection point divides interior ball cutting edge into two sections, and one section length is greater than another segment length, certain radial interval has between outer ball cutting edge and the center pin, the long one section of sphere of interior ball cutting edge length formation is crossing with the sphere of outer ball cutting edge formation about the center pin rotation, the spherical radius of interior ball cutting edge is R, the spherical radius of outer ball cutting edge is R, satisfies: r is more than or equal to 5R and less than or equal to 15R.
As a further improvement of the above technical means, it is preferable that the diameter of the connecting portion is D, and a radial distance between one end of the outer spherical cutting edge adjacent to the central axis and the central axis is L2, so that: l is more than or equal to 0.2mm and less than or equal to 0.2D.
As a further improvement of the above technical means, it is preferable that a connecting edge is provided between one end of the inner spherical cutting edge and the connecting portion, and a chip groove is formed between the connecting edge and the outer spherical cutting edge.
Compared with the prior art, the invention has the advantages that:
(1) according to the multifunctional ball-end milling cutter, the inner ball cutting edge and the outer ball cutting edge are distributed on two different cutting spherical surfaces which are intersected with each other, the inner ball cutting edge is responsible for cutting the central part of the ball-end milling cutter, the outer ball cutting edge is responsible for cutting the peripheral part of the milling cutter, the radius of the spherical surface cut by the inner ball cutting edge is far larger than that of the spherical surface cut by the outer ball cutting edge, and when the ball-end milling cutter performs cavity type large-feed cutting or flat surface profile milling, the radial load is low, and the cutting efficiency is high when the cutting depth is.
(2) The multifunctional ball end mill has the advantages that the front angle of the inner ball cutting edge is large and the rear angle is small compared with that of the outer ball cutting edge, the inner ball cutting edge has better impact resistance and wear resistance, and the outer ball cutting edge cuts lightly and quickly, so that the ball end mill disclosed by the invention has the characteristics of stable performance of the central cutting edge, small cutting vibration and good quality of a processed surface. The big cutting edge of anterior angle is sharp, and the cutting is light and fast, and the relief angle is little, and the contact distance is little between back of a knife blade and the work piece, can extrude the work piece, thereby reduces the elastic deformation of processing and improves the processing surface quality.
Drawings
Fig. 1 is a schematic perspective view of embodiment 1 of the present invention.
Fig. 2 is a schematic front view of embodiment 1 of the present invention.
Fig. 3 is an axial schematic view of a ball head in embodiment 1 of the present invention.
Fig. 4 is an enlarged view of fig. 2 at F.
Fig. 5 is a view a-a of fig. 3.
Fig. 6 is a view B-B in fig. 3.
Fig. 7 is a schematic perspective view of embodiment 2 of the present invention.
Fig. 8 is a schematic front view of embodiment 2 of the present invention.
Fig. 9 is an axial schematic view of a ball head in embodiment 2 of the present invention.
Fig. 10 is a schematic front view of embodiment 3 of the present invention.
Fig. 11 is an axial schematic view of a ball head in embodiment 3 of the present invention.
The reference numerals in the figures denote:
100. a cutting portion; 101. a central shaft; 110. an inner ball cutting edge; 120. an outer ball cutting edge; 130. a connecting blade; 131. a tapered cutting edge; 132. an inner post cutting edge; 133. a corner cutting edge; 140. an outer post cutting edge; 150. a transition cutting edge; 200. a connecting portion; 300. a loading and unloading part; 400. a chip groove.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 6, the multi-functional ball end mill of the present embodiment includes a cutting portion 100, a mounting portion 300, and a connecting portion 200 for connecting the cutting portion 100 and the mounting portion 300, the cutting portion 100 has a central axis 101, the cutting portion 100 includes an inner ball cutting edge 110 and at least one pair of outer ball cutting edges 120, the inner ball cutting edge 110 intersects with the central axis 101 and is rotationally symmetric with respect to the central axis 101, two outer ball cutting edges 120 of each pair of outer ball cutting edges 120 are rotationally symmetric with respect to the central axis 101, and a radial distance is provided between each outer ball cutting edge 120 and the central axis 101, a spherical surface formed by the inner ball cutting edge 110 rotating with respect to the central axis 101 intersects with a spherical surface formed by the outer ball cutting edges 120 rotating with respect to the central axis 101, a spherical surface radius of the inner ball cutting edge 110 is R: r is more than or equal to 5R and less than or equal to 15R. In this embodiment, R = 10R is taken as an example.
In the present embodiment, as shown in fig. 3, a pair of outer ball cutting edges 120 is provided. During actual milling, the two outer spherical cutting edges 120 mill the inner spherical cutting edge 110, and the spherical surface milled by the inner spherical cutting edge 110 intersects with the spherical surface milled by the outer spherical cutting edge 120 to form a complete cut. According to the multifunctional ball-end milling cutter, the inner ball cutting edge 110 and the outer ball cutting edge 120 are distributed on two different cutting spherical surfaces which are intersected with each other, the inner ball cutting edge 110 is responsible for cutting the central part of the ball-end milling cutter, the outer ball cutting edge 120 is responsible for cutting the peripheral part of the milling cutter, the radius of the spherical surface cut by the inner ball cutting edge 110 is far larger than that of the spherical surface cut by the outer ball cutting edge 120, when the ball-end milling cutter carries out cavity type large-feed cutting or flat surface profile milling, the radial load is low, and the cutting efficiency is high when the cutting depth is. That is, the larger the radius, the larger the sphere, the more planar it is, so that even with a large feed the milled surface will be flat (smaller convex portion between the two spheres), while the smaller the ball radius, the more curved it will be, so that only a small feed will be possible, otherwise the convex portion between the two spheres will be higher.
In this embodiment, the vertex of the spherical surface formed by the rotation of the inner ball cutting edge 110 is P1, the vertex of the spherical surface formed by the rotation of the connecting line between the two outer ball cutting edges 120 in each pair of outer ball cutting edges 120 is P2, both P1 and P2 are on the central axis 101, the distance between the two is H, if H is too small, the difference between the spherical surface formed by R and the spherical surface formed by R is not large, and if H is too large, the spherical surface formed by R approaches to the plane, which is not favorable for the processing of curved surfaces and contoured surfaces. In order to ensure that the multifunctional ball head milling cutter has better finish machining and profiling machining capabilities, the H condition is as follows: h is not less than 0.05R and not more than 0.3R, and in the embodiment, H takes 0.1R.
In this embodiment, the diameter of the connecting portion 200 is D, the shortest distance between the outer ball cutting edge 120 and the central axis 101 in the radial direction is L1, and the L1 is also half of the radial width of the inner ball cutting edge 110 on the central axis 101, and in order to ensure the cutting effect of the multifunctional ball end mill, L1 should satisfy: l1 is not less than 0.05D and not more than 0.15D, and in the embodiment, L1 takes the value of 0.1D.
The clearance angles of the inner ball cutting edge 110 and the outer ball cutting edge 120 are β ' respectively, and the clearance angles are equal to or less than 3 degrees and equal to or less than β ' - β and equal to or less than 8 degrees, the rake angles of the inner ball cutting edge 110 and the outer ball cutting edge 120 are respectively equal to or less than gamma and gamma ', and the clearance angles are equal to or less than 2 degrees and equal to or less than 5 degrees, in the embodiment, the specific values are β =3 degrees, β ' =8 degrees, gamma =3 degrees, and gamma ' = -4 degrees, namely, the rake angle is larger than that of the outer ball cutting edge 120, and the inner ball cutting edge has better impact resistance and wear resistance, and the outer ball cutting edge cuts lightly and quickly.
In the present embodiment, the outer cylindrical cutting edge 140 is provided between the outer spherical cutting edge 120 and the connecting portion 200, and the outer cylindrical cutting edge 140 is on a cylindrical surface having the center axis 101 as a rotation center. The diameter of the outer cylindrical cutting edge 140 is equal to the diameter of the connecting portion 200, and is D.
In the embodiment, the connecting edges 130 are arranged between two ends of the inner ball cutting edge 110 and the connecting portion 200, the two outer ball cutting edges 120 and the two connecting edges 130 are circumferentially and uniformly distributed, the outer ball cutting edges 120 and the adjacent connecting edges 130 form four chip discharge grooves 400 in total, the connecting edges 130 are used for supporting the inner ball cutting edges 110, specifically, the connecting edges 130 comprise cone cutting edges 131, the cone cutting edges 131 do not participate in milling in rotation, a rotary frustum of the cone cutting edges 131 relative to the central shaft 101 is wrapped in a spherical surface of the outer ball cutting edges 120 relative to the central shaft 101, the connecting edges 130 and the outer ball cutting edges 120 are different in structure, so that the structure of each chip discharge groove 400 is different, the ball milling cutters of the ball milling head are small in small cutting depth processing, the inner ball cutting edges 110 on the small spherical surface are connected with the connecting portion 200 through the cone cutting edges 130, compared with the common multifunctional ball milling cutters, the ball milling cutters have good rigidity and short cutting edge length, the cutting force is small, the cutting efficiency is high, the quality of the machining surface is good, when large cutting depth processing is performed, the ball milling efficiency of the ball milling cutters 110 is not more than that the ball milling of the common multifunctional ball milling cone milling head, the working surface 3560, the working efficiency of the working edge 110 is not more, the working surface, the working efficiency of the ball milling working surface is not more, the working efficiency of the working ball milling working surface is not more, the working surface, the working efficiency of the working ball milling working surface is not more than that the working surface, the working efficiency of the.
In this embodiment, the connecting edge 130 further includes an inner cylindrical cutting edge 132, the inner cylindrical cutting edge 132 is located between the tapered cutting edge 131 and the connecting portion 200, and the inner cylindrical cutting edge 132 is on a cylindrical surface having the central axis 101 as a rotation center. There is a smoothly transitioning corner cutting edge 133 between the tapered cutting edge 131 and the inner ball cutting edge 110. In order to reduce the outer circle cutting effect of the inner ball cutting edge 110 at the connection portion 200 and to improve the strength at the corner of the inner ball cutting edge 110, the connection edge 130 is composed of a cone cutting edge 131, an inner column cutting edge 132, and an angle cutting edge 133 between the inner ball cutting edge 110 and the cone cutting edge 130. The present invention is not limited thereto, and the connecting edge 130 may be designed to be composed of only the tapered cutting edge 131, or the tapered cutting edge 131 and the corner cutting edge 133, depending on the process requirements. The inner cylindrical cutting edge 132 and the outer cylindrical cutting edge 140 may participate in cutting when actually cutting.
In an embodiment, the cutting portion 100 and the connecting portion 200 may be integrally formed or detachably connected. In this embodiment, the cutting portion 100 and the connecting portion 200 are integrally formed.
In addition to the embodiment 1, in other embodiments, two pairs of the outer spherical cutting edges 120 may be provided, each outer spherical cutting edge 120 and two connecting edges 130 are circumferentially and uniformly distributed, a chip groove 400 is formed between each outer spherical cutting edge 120 and the adjacent connecting edge 130 or between each two adjacent outer spherical cutting edges 120, and the connecting edge 130 is provided between the two pairs of outer spherical cutting edges 120. The number of the outer ball cutting edges 120 is related to the actual milling condition, and generally, a pair is mainly arranged.
Example 2
As shown in fig. 7 to 9, the multi-function milling cutter of the present embodiment is substantially the same as embodiment 1 except that:
in this embodiment, the connecting edge 130 and the outer spherical cutting edge 120 have the same structure, and are rotationally symmetric about the central axis 101. That is, the connecting edge 130 mills in the same way as the outer ball cutting edge 120. The flutes 400 are formed by the region between the connecting edge 130 and the outer spherical cutting edge 120, and the connecting edge 130 and the outer spherical cutting edge 120 have the same structure, so that the four flutes 400 have the same structure. That is, in the present embodiment, the cutting edges are divided into one inner spherical cutting edge 110 and four outer spherical cutting edges 120. There is a smooth transition cutting edge 150 between the connecting edge 130 and the inner ball cutting edge 110. The outer ball cutting edge 120 is connected to the connection portion 200 by the outer cylindrical cutting edge 140.
The rest of the parts which are not described are completely the same as the embodiment 1, and the description is omitted.
Example 3
As shown in fig. 10 and 11, in the multi-functional ball end mill of the present embodiment, the cutting portion 100 includes an inner ball cutting edge 110 and an outer ball cutting edge 120, the inner ball cutting edge 110 intersects with the central axis 101, and the intersection divides the inner ball cutting edge 110 into two sections, one section is longer than the other section, a certain radial distance is provided between the outer ball cutting edge 120 and the central axis 101, a section of the inner ball cutting edge 110 that is long in length intersects with a spherical surface formed by the outer ball cutting edge 120 that is rotated about the central axis 101, a spherical radius of the inner ball cutting edge 110 is R, and a spherical radius of the outer ball cutting edge 120 is R, which satisfy: r is more than or equal to 5R and less than or equal to 15R.
In this embodiment, the connecting edge 130 is provided between only one end of the inner spherical cutting edge 110 and the connecting portion 200, the outer spherical cutting edge 120 and the connecting edge 130 are disposed at 180 °, and a total of two flutes 400 are formed therebetween. The inner ball cutting edge 110 is supported at one end by the connecting edge 130 and connected to the connecting portion 200, and is broken at the other end, and the inner ball cutting edge 110 is asymmetric at both ends on the central axis 101. The portion of the inner ball cutting edge 110 near the end of the connecting edge 130 is rotated to form a spherical surface, and the outer ball cutting edge 120 is rotated to form a spherical surface, so that the two spherical surfaces can intersect with each other, thereby forming a complete cutting edge.
In the present embodiment, the diameter of the connecting portion 200 is D, the radial distance between the end of the outer spherical cutting edge 120 adjacent to the central axis 101 and the central axis 101 is L2, and in order to ensure the chip accommodating space of the inner spherical cutting edge 110 at one end of the central axis 7 and the cutting stability of the end of the outer spherical cutting edge 120 close to the central axis 101, the condition of L2 is satisfied: l2 is not less than 0.05D and not more than 0.2D, and the value of L2 is 0.1D in the embodiment.
The rest of the parts which are not described are the same as those in the embodiment 1, and the description is omitted.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (17)
1. A multi-functional ball nose milling cutter comprising a cutting portion (100), a detachable portion (300) and a connecting portion (200) for connecting the cutting portion (100) and the detachable portion (300), the cutting portion (100) having a central axis (101), characterized in that: the cutting part (100) comprises an inner spherical cutting edge (110) and at least one pair of outer spherical cutting edges (120), the inner spherical cutting edge (110) is intersected with the central shaft (101) and is rotationally symmetrical about the central shaft (101), two outer spherical cutting edges (120) in each pair of outer spherical cutting edges (120) are rotationally symmetrical about the central shaft (101), a certain radial distance is reserved between each outer spherical cutting edge (120) and the central shaft (101), a spherical surface formed by the rotation of the inner spherical cutting edge (110) about the central shaft (101) is intersected with a spherical surface formed by the rotation of each outer spherical cutting edge (120) about the central shaft (101), the spherical radius of the inner spherical cutting edge (110) is R, and the spherical radius of each outer spherical cutting edge (120) is R, so that: r is more than or equal to 5R and less than or equal to 15R.
2. The multi-function ball nose mill of claim 1, wherein: the vertex of the spherical surface formed by the rotation of the inner ball cutting edge (110) is P1, the vertex of the spherical surface formed by the rotation of the connecting line between the two outer ball cutting edges (120) in each pair of outer ball cutting edges (120) is P2, P1 and P2 are both on the central shaft (101), and the distance between the two is H, so that the following requirements are met: h is more than or equal to 0.05R and less than or equal to 0.3R.
3. The multi-function ball nose mill of claim 1, wherein: the diameter of the connecting part (200) is D, the shortest distance between the outer spherical cutting edge (120) and the central shaft (101) in the radial direction is L1, and the following requirements are met: l1 is more than or equal to 0.05D and less than or equal to 0.15D.
4. The multi-functional ball nose milling cutter according to claim 1, wherein the relief angles of the inner ball cutting edge (110) and the outer ball cutting edge (120) are β 'respectively, and satisfy 3 ° ≦ β' - β ≦ 8 °.
5. The multi-function ball nose mill of claim 4, wherein: the front angles of the inner spherical cutting edge (110) and the outer spherical cutting edge (120) are gamma and gamma', respectively, and the following conditions are satisfied: 2 degrees and gamma-gamma' are not more than 5 degrees.
6. The multi-functional ball nose milling cutter according to any one of claims 1 to 5, wherein: an outer cylindrical cutting edge (140) is arranged between the outer spherical cutting edge (120) and the connecting part (200), and the outer cylindrical cutting edge (140) is arranged on a cylindrical surface taking the central shaft (101) as a rotation center.
7. The multi-functional ball nose milling cutter according to any one of claims 1 to 5, wherein: a connecting edge (130) is arranged between the two ends of the inner spherical cutting edge (110) and the connecting part (200), and a chip discharge groove (400) is formed between the connecting edge (130) and the adjacent outer spherical cutting edge (120) or between the two adjacent outer spherical cutting edges (120).
8. The multi-function ball nose mill of claim 7, wherein: the connecting edge (130) comprises a tapered cutting edge (131), and the tapered cutting edge (131) does not participate in milling when rotating.
9. The multi-functional ball nose milling cutter according to claim 8, wherein the cone cutting edge (131) has a cone apex angle of α at a center of rotation of the central axis (101) which satisfies 30 ° - α ° -60 °.
10. The multi-function ball nose mill of claim 8, wherein: the connecting edge (130) further comprises an inner cylindrical cutting edge (132), the inner cylindrical cutting edge (132) is located between the conical cutting edge (131) and the connecting portion (200), the inner cylindrical cutting edge (132) is located on a cylindrical surface with the central axis (101) as a rotation center, and a smoothly-transiting corner cutting edge (133) is arranged between the conical cutting edge (131) and the inner spherical cutting edge (110).
11. The multi-functional ball nose milling cutter according to any one of claims 1 to 5, wherein: the outer spherical cutting edges (120) are provided with a pair of outer spherical cutting edges (120), the two outer spherical cutting edges (120) and the two connecting edges (130) are circumferentially and uniformly distributed, and a chip discharge groove (400) is formed between each outer spherical cutting edge (120) and the adjacent connecting edge (130).
12. The multi-function ball nose mill of claim 7, wherein: the connecting edge (130) and the outer spherical cutting edge (120) have the same structure and are rotationally symmetrical about the central axis (101).
13. The multi-function ball nose mill of claim 12, wherein: the connecting edge (130) and the inner ball cutting edge (110) are provided with a transition cutting edge (150) with smooth transition.
14. The multi-functional ball nose milling cutter according to any one of claims 1 to 5, wherein: the cutting part (100) is detachably connected with the connecting part (200).
15. A multifunctional ball head milling cutter is characterized in that: including cutting portion (100), dismouting portion (300) and be used for connecting portion (200) of cutting portion (100) and dismouting portion (300), cutting portion (100) have center axis (101), its characterized in that: cutting portion (100) include interior ball cutting edge (110) and ectosphere cutting edge (120), interior ball cutting edge (110) is crossing with center pin (101), and the intersection will be divided into two sections interior ball cutting edge (110), and one section length is greater than another segment length, have certain radial interval between ectosphere cutting edge (120) and center pin (101), the sphere that rotatory formation of one section about center pin (101) of interior ball cutting edge (110) length is crossing with the sphere that ectosphere cutting edge (120) rotatory formation about center pin (101), the spherical radius of interior ball cutting edge (110) is R, the spherical radius of ectosphere cutting edge (120) is R, satisfies: r is more than or equal to 5R and less than or equal to 15R.
16. The multi-function ball nose mill of claim 15, wherein: the diameter of the connecting part (200) is D, the radial distance between one end of the outer spherical cutting edge (120) adjacent to the central shaft (101) and the central shaft (101) is L2, and the following conditions are met: l2 is more than or equal to 0.05D and less than or equal to 0.2D.
17. The multi-function ball nose mill of claim 15, wherein: a connecting blade (130) is arranged between one end of the inner spherical cutting blade (110) and the connecting part (200), and a chip discharge groove (400) is formed between the connecting blade (130) and the outer spherical cutting blade (120).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811267986.3A CN109262038B (en) | 2018-10-29 | 2018-10-29 | Multifunctional ball head milling cutter |
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| CN201811267986.3A CN109262038B (en) | 2018-10-29 | 2018-10-29 | Multifunctional ball head milling cutter |
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| CN109262038B true CN109262038B (en) | 2020-06-02 |
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|---|---|---|---|---|
| WO2020166421A1 (en) * | 2019-02-14 | 2020-08-20 | 株式会社Ｍｏｌｄｉｎｏ | Endmill |
| CN112427710B (en) * | 2020-10-27 | 2022-08-12 | 上海航天精密机械研究所 | Anti-flutter cutter for machining thin-wall frame ring part, machining method and medium |
| CN112676765A (en) * | 2020-12-30 | 2021-04-20 | 西安成立航空制造有限公司 | Inner spherical surface machining process |
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| JPS62203710A (en) * | 1986-02-28 | 1987-09-08 | Izumo Sangyo Kk | Rotary cutting tool |
| JPH05228714A (en) * | 1992-02-25 | 1993-09-07 | Nissan Motor Co Ltd | Ball end mill |
| JPH09267211A (en) * | 1996-03-29 | 1997-10-14 | Hitachi Tool Eng Ltd | Ball end mill |
| JPH10118821A (en) * | 1996-10-25 | 1998-05-12 | Tomoji Okina | Cutter |
| JP2005118960A (en) * | 2003-10-17 | 2005-05-12 | Nisshin Kogu Kk | End mill |
| JP2006224254A (en) * | 2005-02-18 | 2006-08-31 | Izumo Sangyo Kk | Ball end mill |
| DE602005018690D1 (en) * | 2005-10-18 | 2010-02-11 | Osg Corp | Ball end mills |
| DE102007010163A1 (en) * | 2007-02-28 | 2008-09-04 | Sandvik Intellectual Property Ab | Spherical-head milling cutter for producing any type of work-piece surfaces has a shank and a cutting part with a cutting edge lying on a sphere's surface |
| JP5499589B2 (en) * | 2009-09-14 | 2014-05-21 | 三菱マテリアル株式会社 | Ball end mill |
| SE535282C2 (en) * | 2010-08-27 | 2012-06-12 | Sandvik Intellectual Property | Cutting with radius section, tools and device for milling |
| CN204053051U (en) * | 2014-09-16 | 2014-12-31 | 贵州西南工具(集团)有限公司 | A kind of two S sword ball end mill |
| CN105436588B (en) * | 2015-12-28 | 2018-05-29 | 株洲钻石切削刀具股份有限公司 | A kind of ball end mill |
| CN106513807B (en) * | 2016-12-13 | 2018-08-31 | 株洲钻石切削刀具股份有限公司 | A kind of ball end mill |
| CN207479704U (en) * | 2017-11-02 | 2018-06-12 | 深圳市卓荦宇精密工具有限公司 | A kind of zanjon is molded rose cutter |
| CN108672780A (en) * | 2018-06-07 | 2018-10-19 | 三砥新材（深圳）有限公司 | milling cutter for processing graphite workpiece |
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| CN109262038A (en) | 2019-01-25 |
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