CN218799398U

CN218799398U - Milling blade

Info

Publication number: CN218799398U
Application number: CN202221633935.XU
Authority: CN
Inventors: 肖康志; 王坎; 胡若逸; 叶家林; 詹光林; 郜勇博; 刘章龙
Original assignee: Xiamen Golden Egret Special Alloy Co Ltd
Current assignee: Xiamen Golden Egret Special Alloy Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-04-07
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a milling blade, which comprises a blade body; the insert body having a front end face (21), a back end face (22), transverse side faces (24, 27), longitudinal side faces (23, 25), a rake face (26) and a central bore (40); the front end surface (21) and the transverse side surface extend to form a cutting edge (31), a first cutting corner edge (30) and a second cutting corner edge (32) are formed at the corner part, the transverse side surface (24) is in an outward convex shape when being seen along the central line X1 direction of the central hole (40), and the transverse side surface (24) consists of three planes (24-1), (24-3) and (24-5) and two circular arc surfaces (24-2) and (24-4); the plane (24-1) and the plane (24-5) form a certain included angle. The utility model discloses can improve efficiency when low cutting depth and stability when big cutting depth to each point life-span on the balanced cutting edge.

Description

Milling blade

Technical Field

The utility model relates to a cutter technical field, especially a high-efficient for the cutting process blade of getting rid of material is suitable for the processing of work piece curved surface, die cavity, plane, inclined plane etc..

Background

In the current metal working industry, the use of indexable inserts instead of solid tools has become a mainstream trend to improve economy. In the fields of automobiles, aviation, molds, energy sources and the like, a large machining allowance is usually reserved for ensuring the dimensional accuracy and the machining stability of parts. In order to facilitate subsequent finish machining, the redundant metal material needs to be removed by a high-efficiency and high-economical cutter.

In the efficient metal removal process, the tool is subject to higher load, which is prone to the problems of breakage and excessive wear. The market for tool life, economy, and efficient cutting tools is therefore becoming more and more pressing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned defect among the prior art is overcome to main aim at, provides a high economic nature efficient milling cutter piece, and the horizontal side of this milling cutter piece is the concatenation of the straight face of multistage and arc surface, even has so that main cutting edge adopts the sharp mode of circular arc transition, can improve the efficiency when low depth of cut and the stability when big depth of cut.

The utility model adopts the following technical scheme:

a milling insert comprising an insert body; the blade body is provided with a front end face, a back end face, a transverse side face, a longitudinal side face, a rake face and a central hole; the central hole penetrates through the blade body; the front end face and the transverse side face extend to form a cutting edge, a first cutting corner edge and a second cutting corner edge are formed at the corner, the transverse side face is in an outward convex shape when being seen along the direction of a central line X1 of the central hole, and the transverse side face consists of three planes and two arc faces; the first plane and the third plane form a certain included angle.

Preferably, the angle between the first plane and the third plane is between 130 ° and 170 °.

Preferably, the main cutting edge, the first cutting corner edge and the second cutting corner edge are higher than the front end surface, and the main cutting edge is higher than the first cutting corner edge and lower than the second cutting corner edge.

Preferably, the rake faces extend downwardly from the main cutting edge at different angles; the width of the rake face varies along the main cutting edge.

Preferably, the rake face extends downwardly from the main cutting edge at a different angle α, which decreases from the highest to the lowest point of the main cutting edge.

Preferably, the rake surface has a width W that varies along the main cutting edge, and the width of the rake surface decreases from the highest point to the lowest point of the tangent edge.

Preferably, the insert body is 180 ° rotationally symmetrical with respect to the center line X1 of the central hole, the 1 st axis X3 in the transverse direction, and the 2 nd axis X2 in the longitudinal direction.

Preferably, the longitudinal side surface consists of three sections of curved surfaces; the first section of curved surface and the third section of curved surface are in the same plane, and the second section of curved surface is a concave curved surface.

Preferably, the third plane is perpendicular to the longitudinal side.

Preferably, the height difference between the highest point and the lowest point on the main cutting edge is between 0.1 and 0.5 mm.

From the above description of the present invention, compared with the prior art, the present invention has the following advantages:

(1) The transverse side surface of the utility model is spliced by a plurality of sections of straight surfaces and arc surfaces, namely, the main cutting edge adopts a mode of arc transition straight line, so that the arc edge is adopted at a low cutting depth, the lower main drift angle Kr realizes high-efficiency cutting, and then the main cutting edge is transited to the straight edge with a large main drift angle, thereby improving the maximum cutting depth; in addition, the straight edge with the fixed main deflection angle can be processed more stably;

(2) The front knife face of the utility model extends downwards from the main cutting edge according to different angles, and the width of the front knife face is provided with different front angles under different cutting depths along the change of the main cutting edge, and different front angles and the width of the variable front knife face are arranged under different cutting depths, so that the uneven stress caused by the difference of cutting thickness under different cutting depths can be reduced, and the service life of each point on the cutting edge is balanced;

(3) The utility model discloses a main cutting edge is higher than first cutting angle sword, is less than second cutting angle sword, and the sword type is ascending trend promptly, through the design of the sword type of optimizing, makes the utility model discloses a milling blade has bigger radial angle after installing the cutter body to better protection knife tip.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following description lists specific embodiments of the present invention.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a perspective view of a milling insert according to an embodiment of the present invention;

fig. 2 is a front view of a milling insert according to an embodiment of the invention;

fig. 3 is a front view of a milling insert according to an embodiment of the invention;

fig. 4 isbase:Sub>A schematic view of the angle and width of the milling insert in thebase:Sub>A-base:Sub>A direction according to an embodiment of the invention;

fig. 5 is a schematic view of the angle and width of the milling insert in the B-B direction according to an embodiment of the invention;

fig. 6 is a schematic view of the angle and width of the milling insert in the C-C direction according to an embodiment of the invention;

fig. 7 is a schematic view of a body of a milling insert according to an embodiment of the present invention;

fig. 8 is a first schematic view of a cutting insert according to an embodiment of the present invention mounted on a cutter body;

fig. 9 is a second schematic view of a cutting insert according to an embodiment of the present invention mounted on a cutter body.

Detailed Description

The present invention will be further described with reference to the following detailed description.

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.

Referring to fig. 1-7, an embodiment of an efficient and economical milling insert is illustrated. In the present embodiment, the milling insert comprises an insert body 10; the insert body 10 is comprised of a front face 21, a back face 22, transverse side faces 24, 27, longitudinal side faces 23, 25, a central bore 40 and a rake face 26. The lateral side 24 is composed of three planes 24-1, 24-3, 24-5 and two circular arc surfaces 24-2, 24-4. Wherein, the planes 24-1 and 24-5 form a certain included angle, and the angle is between 130 degrees and 170 degrees; plane 24-3 is perpendicular to longitudinal side 25; the central hole 40 penetrates through the insert body 10; the front end surface 21 and the lateral side surfaces extend to form a cutting edge 31, and a first cutting corner edge 30 and a second cutting corner edge 32 are formed at the corner.

In particular, as shown in fig. 2, the second cutting corner edge 32 is higher than the main cutting edge 31 than the first cutting corner edge 30 is higher than the plus end surface 21; the main cutting edge is higher at point 31-a than at point 31-b and has a height of between 0.1 and 0.5 mm.

Referring to fig. 3-6, the rake surface 26 extends downwardly from the main cutting edge 31 at different angles and different widths. Specifically, the extension angle α 1< α 2< α 3 and the extension width W1< W2< W3.

Referring to fig. 7, the milling insert of the present example is mounted on the cutter body 40 by screws 50 with the insert back face 22 in contact with the cutter body mounting face 44, the insert longitudinal side face 23 in contact with the cutter body mounting face 45, and the insert lateral side face 27 in contact with the cutter body mounting face 42.

Referring to fig. 8, the insert is mounted in the cutter body at an angle Kr to the plane of the workpiece. To achieve the thin chip principle, kr is typically set at 10-20 °.

Referring to fig. 9, after the milling insert is mounted in the cutter body 40, when viewed from the direction of the central axis X4 of the cutter body 40, the radial angle Ka is the angle formed by the line connecting the center line of the cutter body and the lowest point of the insert and the line connecting the main cutting edge of the insert, and the Ka angle is between 0 ° and 25 °, and the closer to the bottom, the smaller the Ka angle.

The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by those skilled in the art to make many possible variations and modifications, or to modify the equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical essence of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. A milling insert comprising an insert body (10); the insert body having a front end face (21), a back end face (22), transverse side faces (24, 27), longitudinal side faces (23, 25), a rake face (26) and a central bore (40); the central hole (40) penetrates through the blade body (10); the front end surface (21) and the extension of the transverse side surface form a main cutting edge (31), and a first cutting corner edge (30) and a second cutting corner edge (32) are formed at the corner part, and the cutting edge is characterized in that: the transverse side surface (24) is in an outward convex shape when viewed along the direction of a central line X1 of the central hole (40), and consists of three planes and two arc surfaces; the plane at the leftmost side forms a certain included angle with the plane at the rightmost side.

2. The milling insert according to claim 1, wherein the angle between the leftmost plane and the rightmost plane is between 130 ° and 170 °.

3. The milling insert according to claim 1, characterized in that the main cutting edge (31), the first corner edge (30) and the second corner edge (32) are higher than the positive end surface (21), and that the main cutting edge (31) is higher than the first corner edge (30) and lower than the second corner edge (32).

4. The milling insert according to claim 1, characterized in that the rake surfaces (26) extend downwards from the main cutting edge (31) at different angles; the width of the rake face (26) varies along the main cutting edge (31).

5. The milling insert according to claim 4, characterized in that the rake surface (26) extends downwards from the main cutting edge (31) at different angles a, which angles a decrease from the highest point (31-a) to the lowest point (31-b) of the main cutting edge (31).

6. The milling insert according to claim 4, characterized in that the width W of the rake face (26) varies along the main cutting edge (31) with a decreasing trend from the highest point (31-a) to the lowest point (31-b) of the main cutting edge (31).

7. Milling insert according to claim 1, characterized in that the insert body (10) is 180 ° rotationally symmetrical with respect to the centre line X1 of the central bore (40), the 1 st axis X3 of the transverse direction, the 2 nd axis X2 of the longitudinal direction.

8. The milling insert according to claim 1, characterized in that the longitudinal side surface consists of three sections of curved surfaces; the first section of curved surface and the third section of curved surface are in the same plane, and the second section of curved surface is a concave curved surface.

9. Milling insert according to claim 1, characterized in that the plane (24-3) is perpendicular to the longitudinal side (25).

10. Milling insert according to claim 1, characterized in that the height difference between the highest point (31-a) and the lowest point (31-b) on the main cutting edge (31) is between 0.1-0.5 mm.