阅读说明：本技术 一种高效切削刀片 (Efficient cutting blade ) 是由 陈胜男 刘承军 吴志龙 肖旭凯 高江雄 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种高效切削刀片,包括由上底面、下底面、连接所述上底面和下底面的侧表面围成的刀片主体,所述刀片主体上分布有切削单元,所述切削单元包括至少一条主切削刃,所述主切削刃由修光刃、第一切削刃和第二切削刃构成,所述修光刃呈直线状态,所述修光刃与第一切削刃之间、第一切削刃与第二切削刃之间分别通过第一桥接曲线光滑连接。本发明能够实现对切削阻力的分解,减轻切削阻力对修光刃的冲击,用来减少修光刃的破损几率,在保证高效切削加工的同时,持续、稳定的加工出高质量表面。(The invention discloses an efficient cutting blade which comprises a blade main body, wherein the blade main body is formed by an upper bottom surface, a lower bottom surface and a side surface connecting the upper bottom surface and the lower bottom surface in a surrounding mode, cutting units are distributed on the blade main body and comprise at least one main cutting edge, the main cutting edge is composed of a smoothing edge, a first cutting edge and a second cutting edge, the smoothing edge is in a linear state, and the smoothing edge is smoothly connected with the first cutting edge and the second cutting edge through first bridging curves respectively. The invention can decompose cutting resistance, reduce the impact of the cutting resistance on the smoothing edge, reduce the damage probability of the smoothing edge, ensure efficient cutting processing and continuously and stably process a high-quality surface.)

1. A high efficiency cutting insert comprising an insert body bounded by an upper bottom surface, a lower bottom surface, and side surfaces connecting said upper and lower bottom surfaces, characterized in that: the cutting unit is distributed on the blade main body and comprises at least one main cutting edge, the main cutting edge is composed of a smoothing edge, a first cutting edge and a second cutting edge, the smoothing edge is in a linear state, and the smoothing edge and the first cutting edge as well as the first cutting edge and the second cutting edge are respectively and smoothly connected through a first bridging curve; the cutting unit further comprises an auxiliary cutting edge, a main cutter point edge and a main clearance edge, wherein the main cutter point edge is composed of two arcs which are connected in a smooth and smooth mode, one end of the main cutter point edge is connected with the second cutting edge in a smooth mode, the other end of the main cutter point edge is connected with the main clearance edge in a smooth mode through a second bridging curve, and the auxiliary cutting edge is connected with the polishing edge in a smooth mode.

2. The high efficiency cutting insert according to claim 1, wherein: the center of blade main part terminal surface is equipped with the centre bore, the centre bore runs through last bottom surface flat area that the bottom surface set up and the bottom surface flat area that the bottom surface set up down, go up bottom surface flat area with bottom surface flat area is parallel to each other, and perpendicular the axis of centre bore reaches the side surface.

3. The high efficiency cutting insert according to claim 2, wherein: the blade body is provided with at least four cutting units with the same structure, the cutting units comprise a first cutting unit and a second cutting unit which are arranged on the upper bottom surface, and a third cutting unit and a fourth cutting unit which are arranged on the lower bottom surface, and the first cutting unit rotates around the axis of the central hole by a flat angle to be overlapped with the second cutting unit; the third cutting unit rotates around the axis of the central hole by a straight angle to be overlapped with the position of the fourth cutting unit; the first cutting unit and the second cutting unit rotate by a straight angle around the intersecting axis of the bisected base plane formed by the upper bottom surface and the lower bottom surface and the bisected base plane formed by the two long-side flat areas in the side surface, and the first cutting unit and the second cutting unit are respectively overlapped with the third cutting unit and the fourth cutting unit.

4. The high efficiency cutting insert according to claim 1, wherein: one end of the first cutting edge is connected with the smoothing edge through a first bridging curve to form a straight line state; one end of the second cutting edge is connected with the other end of the first cutting edge through a first bridging curve to form a curve state.

5. The high efficiency cutting insert according to any one of claims 1-4, wherein: the first cutting edge and the smoothing edge form an included angle alpha, the arc chord of the second cutting edge and the smoothing edge form an included angle beta, and the included angle alpha is smaller than the included angle beta.

6. The high efficiency cutting insert according to any one of claims 1-4, wherein: the smoothing edge, the first cutting edge and the second cutting edge regularly extend towards the direction of the central hole to form a smoothing edge zone, a first cutting edge zone and a second cutting edge zone respectively, and the smoothing edge zone, the first cutting edge zone and the second cutting edge zone are connected smoothly through a bridging edge zone respectively.

7. The high efficiency cutting insert according to claim 6, wherein: the extending direction of the smoothing blade zone is parallel to the plane where the flat area of the upper bottom surface and/or the lower bottom surface is located, and the extending direction of the second cutting blade zone inclines towards the flat area of the upper bottom surface and/or the lower bottom surface.

8. The high efficiency cutting insert according to claim 6, wherein: the angle formed by the first cutting edge band towards the extending direction of the central hole is between the extending direction of the smoothing edge band and the included angle formed by the inclination of the second cutting edge.

9. The high efficiency cutting insert according to claim 8, wherein: the width of the smoothing margin is larger than that of the second cutting margin, and the width of the first cutting margin is larger than that of the second cutting margin and smaller than that of the smoothing margin.

10. The high efficiency cutting insert according to any one of claims 1-4, wherein: the wiper edge, the first cutting edge and the second cutting edge are convex and form a space curve toward the outer direction of the insert body.

Technical Field

The invention relates to the technical field of metal cutting machining, in particular to an efficient cutting blade.

Background

In metal cutting, milling is the most common machining method, and generally, a part to be machined is fixed on a machine tool operating table, and a milling tool rotating at a high speed is used for feeding on the surface of the part with a certain feeding amount, so as to machine the shape and the characteristic of the part, wherein the feeding amount of the tool determines the cutting efficiency of the tool. If the feed per tooth (or per revolution) of the tool is larger, the larger the volume of the removed iron pieces is, which means the larger the total mass of the iron pieces processed per unit time is, it can be understood that the higher the metal removal rate of the tool is, the higher the cutting efficiency of the blade is. In order to increase the metal removal rate and seek high cutting efficiency, the structural design of the insert, especially the structural design of the main cutting edge of the insert, needs to consider more adverse effects of the large-margin cutting resistance on the stability of the cutter system, the integrity of the cutting edge of the insert, the surface quality of parts and the like.

The data disclosed in international patent WO2017/051471 show that the design of the insert structure, particularly the main cutting edge structure, enables the insert to perform high-speed feed machining, and improves chip removal to achieve good machined surface quality.

The structural design of the main cutting edge of the current blade does not excessively consider the protection of the blade shape with the improved surface quality, and the structural design of the blade has certain defects. It has been proved that, in milling, if a good surface quality is to be obtained, a structure capable of finishing is required to be arranged in the main cutting edge, the finishing edge is generally designed to be a straight structure or an arc structure similar to a straight line in the cutting plane, the finishing edge always participates in cutting and finishing along the processing plane, and no matter which structure is adopted, the final purpose is only one, namely, the quality of the processed surface is improved.

However, especially under the high-feed cutting condition that the feed amount per tooth is about 0.8 to 1.0 mm/tooth, the scrap iron with larger volume is formed, the thicker the thickness of the scrap iron is, the larger the cutting resistance the cutter needs to bear is, the cutting resistance mainly acts on the main cutting edge, and generates a large amount of cutting heat, the abnormal wear and even micro-collapse of the cutting edge of the blade can occur at a high probability, the service life of the blade is affected, and in the high-efficiency processing with high surface quality requirement, the reduction of the cutting resistance impact of the main cutting edge, especially the smoothing edge is important, generally, in the high-speed feed processing, the cutting allowance of the blade is larger, the cutting resistance and the cutting heat can completely act around the main cutting edge, so that the main cutting edge is damaged quickly, and the surface quality of the part cannot be guaranteed.

Disclosure of Invention

The present invention is intended to solve the above-mentioned problems to some extent, and to provide an efficient cutting insert which can resolve cutting resistance, reduce impact of the cutting resistance on a wiper edge, reduce the probability of breakage of the wiper edge, and continuously and stably process a high-quality surface while ensuring efficient cutting.

The technical scheme adopted by the invention for solving the technical problems is as follows: the efficient cutting blade comprises a blade main body which is formed by an upper bottom surface, a lower bottom surface and side surfaces connecting the upper bottom surface and the lower bottom surface in a surrounding mode, wherein cutting units are distributed on the blade main body and comprise at least one main cutting edge, the main cutting edge comprises a smoothing edge, a first cutting edge and a second cutting edge, the smoothing edge is in a linear state, and the smoothing edge is smoothly connected with the first cutting edge and the second cutting edge through first bridging curves respectively; the cutting unit further comprises an auxiliary cutting edge, a main cutter point edge and a main clearance edge, wherein the main cutter point edge is composed of two arcs which are connected in a smooth and smooth mode, one end of the main cutter point edge is connected with the second cutting edge in a smooth mode, the other end of the main cutter point edge is connected with the main clearance edge in a smooth mode through a second bridging curve, and the auxiliary cutting edge is connected with the polishing edge in a smooth mode.

Preferably, a center hole is formed in the center of the end face of the blade body, the center hole penetrates through an upper bottom surface flat region formed in the upper bottom surface and a lower bottom surface flat region formed in the lower bottom surface, and the upper bottom surface flat region and the lower bottom surface flat region are parallel to each other and perpendicular to the axis of the center hole and the side surface.

Preferably, at least four cutting units with the same structure are arranged on the blade main body, each cutting unit comprises a first cutting unit and a second cutting unit which are arranged on the upper bottom surface, and a third cutting unit and a fourth cutting unit which are arranged on the lower bottom surface, and the first cutting unit rotates around the axis of the central hole by a flat angle to be overlapped with the second cutting unit; the third cutting unit rotates around the axis of the central hole by a straight angle to be overlapped with the position of the fourth cutting unit; the first cutting unit and the second cutting unit rotate by a straight angle around the intersecting axis of the bisected base plane formed by the upper bottom surface and the lower bottom surface and the bisected base plane formed by the two long-side flat areas in the side surface, and the first cutting unit and the second cutting unit are respectively overlapped with the third cutting unit and the fourth cutting unit.

Preferably, one end of the first cutting edge is connected with the smoothing edge through a first bridging curve to form a straight line; one end of the second cutting edge is connected with the other end of the first cutting edge through a first bridging curve to form a curve state.

Preferably, the first cutting edge and the wiper edge form an included angle α, the arc chord of the second cutting edge and the wiper edge form an included angle β, and the included angle α is smaller than the included angle β.

Preferably, the smoothing edge, the first cutting edge and the second cutting edge regularly extend towards the direction of the central hole to form a smoothing margin, a first cutting margin and a second cutting margin respectively, and the smoothing margin, the first cutting margin and the second cutting margin are smoothly connected through a bridging margin respectively.

Preferably, the extending direction of the smoothing margin is parallel to the plane of the upper bottom surface and/or the lower bottom surface flat area, and the extending direction of the second cutting margin is inclined towards the upper bottom surface and/or the lower bottom surface flat area.

Preferably, the angle formed by the first cutting edge band towards the extending direction of the central hole is between the extending direction of the smoothing edge band and the included angle formed by the inclination of the second cutting edge.

Preferably, the width of the smoothing margin is greater than the width of the second cutting margin, and the width of the first cutting margin is greater than the width of the second cutting margin and less than the width of the smoothing margin.

Preferably, the wiper edge, the first cutting edge and the second cutting edge are convex toward the outside of the insert body and are curved in space.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the main cutting edge is provided with a smoothing edge and is provided with a first cutting edge for protecting the smoothing edge, when the blade participates in the next cutting with constant feed, the first cutting edge divides the thickness of chips, so that the thickness of the chips of the first cutting edge is smaller than that of the chips of the second cutting edge, the thickness of the chips near the smoothing edge is reduced, the impact of cutting resistance on the smoothing edge is reduced, the cutting resistance and the cutting heat in the range of the smoothing edge and the first cutting edge are obviously reduced, the smoothing edge is protected, the durability of the cutter is improved, and the surface quality in high-speed feed machining is ensured;

the second cutting edge of the main cutting edge is a convex curve edge, the second cutting edge is an important part of the blade for carrying out large-allowance cutting processing, the impact and resistance are large, the strength of the cutting edge can be improved due to the convex curve design, meanwhile, the cutting resistance is subdivided, the concentrated impact force of the cutting edge is reduced, the impact resistance of the cutting edge is improved, and the service life of the cutter is prolonged;

the angle between the first cutting edge and the flat trimming edge of the main cutting edge is smaller than the angle between the arc chord and the flat trimming edge of the second cutting edge, and the angle between the first cutting edge and the flat trimming edge cannot exceed 45 degrees.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

In the drawings:

FIG. 1 is an isometric view of a high efficiency cutting insert according to the present invention;

FIG. 2 is a top view of the high efficiency cutting insert of the present invention;

FIG. 3 is a bottom view of the high efficiency cutting insert of the present invention;

FIG. 4 is a front view of the high efficiency cutting insert of the present invention;

FIG. 5 is an enlarged, partial top view of the high efficiency cutting insert of the present invention;

FIG. 6 is an enlarged, partial top view of the high efficiency cutting insert of the present invention;

FIG. 7 is a cross-sectional view of C-C of FIG. 6 rotated 90 degrees counterclockwise;

FIG. 8 is a cross-sectional view taken 80 degrees counter-clockwise from D-D in FIG. 6;

FIG. 9 is a 65 degree counterclockwise cross-sectional view of E-E of FIG. 6;

FIG. 10 is a view of the blade structure of the present invention;

FIG. 11 is a schematic view of the assembly of the high efficiency cutting insert according to embodiment 1 of the present invention;

fig. 12 is a schematic view showing the assembly of the high-efficiency cutting insert according to embodiment 2 of the present invention.

Reference numerals: 100-a blade body; 200-single identification point; 300-double identification points; 1-upper bottom surface; 2-lower bottom surface; 3-side surface; 4-a cutting unit; 401-first cutting list; 402-a second cutting sheet; 403-third cutting list; 404-a fourth cutting unit; 5-a main cutting edge; 501-smoothing edge; 502-a first cutting edge; 503-a second cutting edge; 504-a first bridge curve; 6-minor cutting edge; 7-main blade edge; 8-main clearance edge; 9-a central hole; 10-upper bottom flat area; 11-lower floor flat area; 12-a knife slot; 13-chip flutes; 14-chip breaking table; 15-long side flat area; 16-short edge curved surface; 17-included angle α; 18-angle beta; 19-smoothing the margin; 20-a first cutting land; 21-a second cutting land; 22-bridging the margin; 23-a first positioning base; 24-a second positioning base; 25-a third positioning base; 26-cutting plane; 27-rake cut angle; 28-center of rotation.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, and thus, are not to be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Example 1

Fig. 1 shows a high-efficiency cutting insert according to the present embodiment, which includes an insert main body 100 surrounded by an upper bottom surface 1, a lower bottom surface 2, and a side surface 3 connecting the upper bottom surface 1 and the lower bottom surface 2, wherein cutting units 4 are distributed on the insert main body 100, each cutting unit 4 includes at least one main cutting edge 5, and under a cutting condition with a certain feed amount, the insert main body 100 and a part make relative movement, so that the insert main body 100 is caused to cut into the inside of the part, curled chips are formed on a rake surface, and redundant materials are removed; the main cutting edge 5 includes a wiper edge 501, a first cutting edge 502, and a second cutting edge 503, the wiper edge 501 is in a linear state, the wiper edge 501, the first cutting edge 502, and the second cutting edge 503 are convex toward the outside of the insert body 100 and form a spatial curve, and the wiper edge 501 and the first cutting edge 502, and the first cutting edge 502 and the second cutting edge 503 are smoothly connected by a first bridge curve 504, respectively; the cutting unit 4 further comprises an auxiliary cutting edge 6, a main tip edge 7 and a main clearance edge 8, wherein the main tip edge 7 is composed of two arcs in smooth connection, one end of the main tip edge is smoothly connected with the second cutting edge 503, the other end of the main tip edge is smoothly connected with the main clearance edge 8 through a second bridging curve, and the auxiliary cutting edge 6 is smoothly connected with the finishing edge 501;

wherein the main cutting edge 7 is formed by a convex curve, the main cutting edge 7 takes charge of a part of cutting tasks under the condition of large cutting depth, and because the main cutting edge 7 is easy to be damaged during high-speed cutting, a large circular arc structure is usually adopted to make up for the deficiency,

furthermore, the main clearance edge 8 has a tendency of inclining towards the inside of the blade main body 100, so that the main clearance edge can avoid the side wall surface of a processed part when a deep cavity is processed, and a partition is generated between the blade main body 100 and the side wall surface of the part, so that the interference is avoided, and the quality of the side wall surface of the part is improved.

It should be noted that the wiper edge 501 is parallel to the cutting plane 26 and is in a linear state, the rotation plane of the wiper edge 501 around the central axis of the cutter body coincides with the cutting plane 26, a part of the wiper edge 501 is used for participating in actual cutting, and is affected by certain adverse cutting factors, and a part of the wiper edge 501 is used for participating in surface finishing, and is not used for participating in actual cutting.

In the embodiment, the main cutting edge 5 is provided with the wiper edge 501 and is provided with the first cutting edge 502 for protecting the wiper edge 501, when the insert participates in the next cutting with constant feed, the first cutting edge 502 divides the chip thickness, so that the chip thickness of the first cutting edge 502 is smaller than that of the second cutting edge 503, the chip thickness near the wiper edge 501 is reduced, the impact of cutting resistance on the wiper edge 501 is reduced, the cutting resistance and the cutting heat in the ranges of the wiper edge 501 and the first cutting edge 502 are obviously reduced, the wiper edge 501 is protected, the tool durability is improved, and the surface quality in high-speed feed processing is ensured;

in this embodiment, as shown in fig. 1 to 3, a center hole 9 is formed in the center of the end surface of the insert body 100, the center hole 9 penetrates through an upper bottom surface flat region 10 formed on the upper bottom surface 1 and a lower bottom surface flat region 11 formed on the lower bottom surface 2, the upper bottom surface flat region 10 and the lower bottom surface flat region 11 are parallel to each other and perpendicular to the axis of the center hole 9 and the side surface 3, and the center hole 9 is used for placing a compression screw to fix the insert body 100 in the pocket 12;

in this embodiment, as shown in fig. 4, at least four cutting units 4 having the same structure and a certain rotational symmetry are disposed on the insert body 100, and include a first cutting unit 401 and a second cutting unit 402 disposed on the upper bottom surface 1, and a third cutting unit 403 and a fourth cutting unit 404 disposed on the lower bottom surface 2, where the first cutting unit 401 rotates around the axis of the central hole 9 by a flat angle and coincides with the position of the second cutting unit 402; the third cutting unit 403 rotates around the axis of the central hole 9 by a straight angle to coincide with the position of the fourth cutting unit 404; the first cutting unit 401 and the second cutting unit 402 rotate by a straight angle around the intersecting axis of the bisected base plane formed by the upper bottom surface 1 and the lower bottom surface 2 and the bisected base plane formed by the two long-side flat regions 15 in the side surface 3, and are respectively overlapped with the third cutting unit 403 and the fourth cutting unit 404;

the cutting unit 4 is convex towards the upper bottom surface 1 or the lower bottom surface flat area 11, and the convex characteristic can ensure that the cutting unit 4 has a large cutting rake angle 27, and under the cooperation of the chip groove 13 and the chip breaking platform 14, chips can be curled and broken in a preset mode.

Specifically, the long-side flat region 15 and the short-side curved surface 16, which are symmetrically arranged on the upper bottom flat region 10, the lower bottom flat region 11 and the side surface 3, are positioning base surfaces of the insert body 100, so that the insert body 100 can be accurately, reasonably and safely installed in the pocket 12, and the insert body 100 is prevented from being loosened.

In this embodiment, one end of the first cutting edge 502 is connected to the wiper edge 501 via a first bridge curve 504 in a straight line; one end of the second cutting edge 503 is connected with the other end of the first cutting edge 502 by a first bridging curve 504 to form a curve state, and the structure has a more stable cutting edge structure, so that the cutting resistance is more dispersed, and the impact on the whole cutting edge is reduced;

the second cutting edge 503 of the main cutting edge 5 is a convex curve edge, the second cutting edge 503 is an important part of the blade for large-allowance cutting processing, the impact and resistance are large, the convex curve design can improve the strength of the cutting edge, meanwhile, the cutting resistance is subdivided, the concentrated impact force of the cutting edge is reduced, the impact resistance of the cutting edge is improved, and the service life of the cutter is prolonged;

in the present embodiment, as shown in fig. 5, the first cutting edge 502 and the wiper edge 501 form an angle α 17, the second cutting edge 503 and the wiper edge 501 form an angle β 18, and the angle α 17 is smaller than the angle β 18, so that during cutting, a thin chip is formed in a partial region of the first cutting edge 502 and the wiper edge 501, a thick chip is formed in a region of the first cutting edge 502 and the second cutting edge 503, a chip shape is in a state of being thin near the wiper edge 501 and being far from the wiper edge 501, and thus the first cutting edge 502 decomposes the cutting resistance by the second cutting edge 503 while keeping the feed amount constant and without affecting the cutting efficiency, and the impact on the wiper edge 501 is reduced, thereby being effectively protected.

It should be noted that, according to the force decomposition, the cutting resultant force can be decomposed into a radial resistance and an axial resistance, the radial resistance can cause the cutter to vibrate, the axial resistance can check the rigidity of the tool system, and when the angle between the main cutting edge 5 and the cutting plane 26 is 45 degrees, the radial resistance and the axial resistance are equal; and when the angle of main cutting edge 5 and cutting plane 26 is less than 45 degrees, radial resistance is littleer than axial resistance, and under the condition that the tool system rigidity satisfies, this kind is advisable, contained angle alpha 17 with contained angle beta 18 can not exceed 45 degrees, the comprehensive resistance of main cutting edge 5 is effectively improved, can play the effect that reduces comprehensive radial resistance, reduces the cutting vibrations of cutter, promotes surface machining quality, alleviates surface machining chatter marks, prevents that blade tipping and other dangerous things from taking place.

Specifically, an angle α 17 between the first cutting edge 502 and the wiper edge 501 is 10 degrees, an angle β 18 between an arc chord of the second cutting edge 503 and the wiper edge 501 is 25 degrees, and the thickness of the chip becomes thinner near the wiper edge 501, so that the chip is weakened in cutting resistance, and the wiper edge 501 is protected.

In the present embodiment, as shown in fig. 6 to 9, the wiper edge 501, the first cutting edge 502 and the second cutting edge 503 extend regularly toward the central hole 9 to form a wiper land 19, a first cutting land 20 and a second cutting land 21, respectively, and the wiper land 19, the first cutting land 20 and the second cutting land 21 are connected smoothly by a bridge land 22;

wherein the extension direction of the smoothing land 19 is parallel to the plane of the upper bottom surface 1 and/or the lower bottom surface flat region 11, the extension direction of the second cutting land 21 is inclined toward the upper bottom surface and/or the lower bottom surface flat region 11, the angle formed by the first cutting land 20 toward the extension direction of the central hole 9 is between the extension direction of the smoothing land 19 and the angle formed by the inclination of the second cutting edge 503, by this structure, the insert body 100 itself is a zero-degree relief angle, but when the insert body 100 is mounted on a cutter body, the insert body 100 is axially mounted at a negative angle so as to form a cutting relief angle with the cutting plane 26, and the smoothing land 19, the first cutting land 20, the second cutting land 21 and the bridging land 22 thereof form new different-angle land cutting inclination angles in the above-described mounting manner, in order to perform different functions when cutting.

Specifically, in order to increase the strength of the smoothing margin 19 and appropriately reduce the cutting resistance, the width of the smoothing margin 19 is greater than the width of the second cutting margin 21, the width of the first cutting margin 20 is greater than the width of the second cutting margin 21 and is less than the width of the smoothing margin 19,

in this embodiment, as shown in fig. 2-3, a single identification point 200 is set near the second cutting unit 402 of the upper bottom surface 1, and a double identification point 300 is set near the third cutting unit 403 of the lower bottom surface 2, and the identification points can distinguish the upper bottom surface 2 from the lower bottom surface 2, and distinguish different cutting units 4 of the same bottom surface, thereby facilitating installation, processing and identification of test data acquisition.

In the present embodiment, as shown in fig. 10 to 11, the insert body 100 is placed in the pocket 12 in the cutter body such that the long-side flat region 15 of the insert body 100 abuts against the first positioning base surface 23 in the pocket 12, the short-side curved surface 16 abuts against the second positioning base surface 24 in the pocket 12, the upper bottom surface 1 or the lower bottom surface 2 abuts against the third positioning base surface 25 in the pocket 12, the center hole 9 of the insert body 100 and the pocket threaded hole have positional deviation, the insert body 100 is locked tightly in the pocket 12 by the compression screw in an eccentric manner, and at this time, the assembly work of the cutter is completed, and in order to achieve stable cutting, the close fit of the insert body 100 and the cutter body is very important, and therefore, before use, it is necessary to check whether there is a gap between the insert body 100 and the positioning surface of the pocket 12, check whether the end surface run-out and the radial run-out and the outer diameter thereof are within the design-stipulated range, the general cutter body has at least one cutting groove 12, when the blade body 100 is completely installed on the cutting groove 12, the cutter body is installed on the machine tool through the tool system, and the machine tool spindle drives the cutter body to rotate clockwise around the rotation center 28 at a high speed, so as to realize cutting processing.

Example 2

As shown in fig. 12, the present embodiment is different from embodiment 1 in the assembling manner of the insert body 100, and specifically, the insert body 100 may be cut in a manner of rotating around the rotation center 28 counterclockwise, which widens the application range of the insert body 100 and enables various portions of the insert body 100 to function. The blade main part 100 adopts the axial to install for negative angle and carries out cutting process on the cutter body equally, reserves cutting relief angle, the rotation plane of the first minor cutting edge of blade main part 100 keeps and cutting plane 26 coincidence, plays the slick effect on part surface, and the major work that part material was got rid of is undertaken to the second minor cutting edge, and vice tool point sword and vice empty sword of keeping away can participate in the actual cutting task equally under the big depth of cut condition simultaneously, constitute minor cutting edge 6 first minor cutting edge, second minor cutting edge and the whole orientation of bridging curve the outside protrusion of blade main part 100 is the curve, can increase minor cutting edge 6's blade intensity, improves the incorruptibility of blade main part 100.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.