CN216096443U

CN216096443U - Double-sided indexable cutting insert

Info

Publication number: CN216096443U
Application number: CN202122180893.0U
Authority: CN
Inventors: 周焱强; 李剑锋; 杨俊鹏
Original assignee: Zhuzhou Weikai Cutting Tools Co ltd
Current assignee: Zhuzhou Weikai Cutting Tools Co ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-03-22
Anticipated expiration: 2031-09-09

Abstract

The utility model discloses a double-sided indexable cutting insert, wherein an insert body is a polygonal body, a positioning center hole is formed in the geometric center of the insert body, the insert body comprises an upper surface, a lower surface and a plurality of side surfaces for connecting the upper surface and the lower surface, and two adjacent side surfaces are connected through an arc surface; the blade is provided with at least one cutting unit, and the cutting unit comprises an arc edge, a cutting edge and a chip breaker groove. The utility model ensures the sufficient strength of the blade and is beneficial to guiding the large cutting curl so as to effectively break. The radius and the width of the arc surface are increased at the arc position of the cutter point, and the strength of the arc of the cutter point is enhanced, so that the strength and the shock resistance of the cutting edge of the blade are improved.

Description

Double-sided indexable cutting insert

Technical Field

The utility model relates to the technical field of hard alloy blades, in particular to a double-sided indexable cutting blade.

Background

In the metal cutting field, in order to improve production efficiency and quickly remove most of turning allowance on a blank, a rough machining blade has to have enough strength and can remove more allowance at one time so as to adapt to the characteristics of deep cutting and quick feeding.

Chinese utility model patent publication No. CN206343637U discloses a double-sided indexable cutting insert, which has a triple rake angle structure, takes into account the sharpness and strength of the cutting edge, and a large chip accommodating space and an appropriate cutting guide curved surface, and is advantageous for curling and breaking chips when processing materials with relatively high hardness. The front knife face in the technical scheme is a plane, and in rough machining or interrupted machining, the rear knife face at the knife tip is easy to have great abrasion or edge breakage, so that the surface roughness of a machined workpiece is poor or the diameter size of the workpiece is out of tolerance, and the requirement of the product cannot be met, so that the blade cannot be machined continuously.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a double-sided indexable cutting insert which can ensure that the cutting insert has enough strength and impact resistance during rough machining or intermittent machining and fully ensures the wear resistance and the service life of the cutting insert.

The purpose of the utility model is realized by the following technical scheme:

a double-sided indexable cutting insert is characterized in that an insert body is a polygonal body, a positioning central hole is formed in the geometric center of the insert body, the insert body comprises an upper surface, a lower surface and a plurality of side surfaces for connecting the upper surface and the lower surface, and two adjacent side surfaces are connected through an arc surface;

the upper surface of the blade body is uniformly provided with a first protruding part and a second protruding part for mounting and positioning along the positioning central hole;

the cutting unit is arranged at the vertex angle of the blade body and symmetrically distributed along the angular bisector of the vertex angle; the cutting unit consists of an arc edge, a cutting edge and a chip breaker groove, wherein the arc edge is formed by intersecting an arc surface and an upper surface or a lower surface, the cutting edge is formed by intersecting a side surface and the upper surface or the lower surface, and the chip breaker groove consists of an arc edge, an arc-position blade band plane, an arc surface, a first front cutter surface, a transition arc surface, a chip groove, a first chip breaker platform and a first protruding part which are arranged along the direction of an apex angle bisector from the arc edge to a central positioning hole;

the edge width and the radius of the arc surface at the arc edge are larger than those at the cutting edge.

Further, the first chip breaking table is of a circular truncated cone shape.

Further, the distance L1 from the center of the first chip breaking table to the arc edge along the bisector of the vertex angle is 1-5 mm, and the vertical height H1 from the highest position of the first chip breaking table to the protrusion is 0-0.5 mm.

Preferably, the distance L1 from the center of the first chip breaking table to the arc edge along the bisector of the vertex angle is 1.85mm, and the vertical height H1 from the highest position of the first chip breaking table to the protrusion is 0.08 mm.

Further, a first rake angle alpha formed by the first rake face and the upper surface at the arc edge is 10-30 degrees, and the radius R1 of the arc surface is 0.5-2 mm.

Preferably, the first rake face forms a first rake angle α of 20 ° with the upper surface at the circular arc edge, and the radius R1 of the circular arc surface is 1 mm.

Further, the first rake face is sequentially divided into a first part, a second part and a third part at the cutting edge, wherein a rake angle beta formed by the first part and the upper surface is 10-30 degrees and beta is 10-30 degrees, and beta is larger than alpha; the second portion is arc-shaped, and the third portion forms a rake angle theta with the upper surface of 10-30 degrees, and theta is alpha.

Further, the radius R2 of the arc surface between the first part of the first rake face at the cutting edge and the land plane is 0-1 mm, the radius R3 of the arc surface between the third part and the land plane is 0-1 mm, and R3> R2.

Further, the length of the first part on the first rake face is 1 mm-5 mm, and the length of the second part is 0-2 mm.

Further, the widths of the first and second portions on the first rake surface are constant.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, through the design of the arc surface between the cutting edge and the front cutter surface, the sufficient strength of the blade is ensured, and the large cutting curl is guided, so that the blade is effectively broken. The radius R and the width of the arc surface are increased at the arc position of the cutter point, and the strength of the arc of the cutter point is enhanced, so that the strength and the shock resistance of the cutting edge of the blade are improved.

The utility model adopts the design of changing the edge width on the arc surface at the cutting edge, and can ensure the strength of the blade even if the cutting processing is carried out under a great cutting depth parameter. Thereby improving the life of the blade.

Drawings

FIG. 1 is a perspective view of a double-sided indexable cutting insert;

FIG. 2 is a schematic view of a double-sided indexable cutting insert;

FIG. 3 is an enlarged partial view of the cutting insert shown in FIG. 2;

FIG. 4 is a cross-sectional view of the cutting insert of FIG. 2 taken along line G-G;

FIG. 5 is a cross-sectional view of the cutting insert of FIG. 2 taken along line H-H;

FIG. 6 is a cross-sectional view of the cutting insert shown in FIG. 2 taken along line J-J;

the cutting insert comprises an insert body 1, an upper surface 2, a lower surface 3, a side surface 4, an arc surface 5, a first protrusion 6, a second protrusion 7, a cutting edge 8, a cutting edge land plane 9, an arc edge 10, an arc edge 11, an arc land plane 12, a first rake face first portion 13, a first rake face second portion 14, a first rake face third portion 14, a first chip breaking table 15, a transition arc surface 16, a chip groove 17, a chip groove 18, a center positioning hole 19 and a first rake face 20.

Detailed Description

The drawings are for illustration purposes only and are not to be construed as limiting the utility model; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.

Example 1

As shown in fig. 1 to 5, the present embodiment provides a double-sided indexable cutting insert, wherein the insert body 1 is a polygonal body, and a center positioning hole 19 is formed at the geometric center of the insert body 1. The insert body 1 comprises an upper surface 2, a lower surface 3 and a plurality of side surfaces 4 for connecting the upper surface 2 and the lower surface 3, and two adjacent side surfaces 4 are connected through an arc surface 5. The first projecting portion 6 and the second projecting portion 7 for mounting positioning are uniformly provided along the center positioning hole 19 on the upper surface 2 of the insert body 1.

At least one cutting unit is arranged on the blade body 1, and the cutting units are arranged at the top angle of the blade body 1 and symmetrically distributed along the angular bisector of the top angle. The cutting unit comprises a circular arc edge 10, a cutting edge 8 and a chip breaker 18. The arc blade 10 is formed by intersecting an arc surface 5 and an upper surface 2 or a lower surface 3, the cutting blade 8 is formed by intersecting a side surface 4 and the upper surface 2 or the lower surface 3, and the chip breaker 18 is formed by the arc blade 10, an arc-position land plane 11, an arc surface, a first rake surface 20, a transition arc surface 16, a chip breaker 17, a first chip breaker 15 and a first protrusion 6, which are arranged along the direction of a vertex angle bisector from the arc blade 10 to a central positioning hole 19. In the present embodiment, the first chip breaker 15 is a circular truncated cone; the distance L1 from the center of the first chip breaking table 15 to the arc edge 10 along the bisector of the vertex angle is 1-5 mm, and the preferred distance is 1.85mm in the embodiment; the vertical height H1 from the highest position of the first chip breaking platform 15 to the protruding part is 0-0.5 mm, and preferably 0.08mm in the embodiment.

In order to ensure the strength of the blade, the edge width and the radius of the arc surface at the arc edge 10 are larger than those at the cutting edge 8 in the embodiment. Specifically, the first rake surface 30 forms a first rake angle α with the upper surface 2 at the circular arc edge 10 of 10 to 30 °, preferably 20 ° in the present embodiment, and the radius R1 of the circular arc surface is 0.5 to 2mm, preferably 1mm in the present embodiment. The first rake face 20 is divided into a first portion 12, a second portion 13 and a third portion 14 in this order at the cutting edge 8, and the rake angle β formed by the first portion 12 and the upper surface 2 is 10 ° to 30 ° β and 10 ° to 30 ° β > α; the second portion 13 is arc-shaped, the third portion 14 forms a rake angle theta with the upper surface 2 of 10-30 degrees, and theta is alpha; the radius R2 of the arc surface between the first portion 12 of the first rake face at the cutting edge 8 and the cutting edge land plane 9 is 0-1 mm, the radius R3 of the arc surface between the third portion 14 and the cutting edge land plane 9 is 0-1 mm, and R3> R2. The length of the first portion 12 on the first rake surface is 1mm to 5mm, preferably 2.2mm in the present embodiment, the length of the second portion 13 is 0 to 2mm, preferably 1mm in the present embodiment, and the widths of the first portion 12 and the second portion 13 are constant.

In the embodiment, the mode of enlarging the arc surface and reducing the angle of the front tool face is adopted at the arc part of the tool nose, so that the strength of the cutting edge of the tool nose is enhanced; the cutting edge strength of the cutting edge is enhanced by adopting a variable arc surface mode at the cutting edge; the strength of the cutting edge of the blade is fully ensured, so that the wear resistance and the impact resistance of the blade are ensured under the rough machining or chip breaking cutting conditions, and the service life of the blade is prolonged.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A double-sided indexable cutting insert is characterized in that an insert body is a polygonal body, a positioning center hole is formed in the geometric center of the insert body, the insert body comprises an upper surface, a lower surface and a plurality of side surfaces for connecting the upper surface and the lower surface, and two adjacent side surfaces are connected through an arc surface;

2. The double-sided indexable cutting insert of claim 1 wherein the first chip breaker is of the truncated cone type.

3. The double-sided indexable cutting insert of claim 2 wherein a distance L1 from a center of the first chip breaker to the circular-arc edge along a bisector of a vertex angle is 1-5 mm, and a vertical height H1 from a highest point of the first chip breaker to the protrusion is 0-0.5 mm.

4. The double-sided indexable cutting insert of claim 3 wherein a distance L1 from the center of the first chip breaker to the circular edge along the bisector of the corner angle is 1.85mm, and a vertical height H1 from the highest of the first chip breaker to the protrusion is 0.08 mm.

5. The double-sided indexable cutting insert of claim 1 wherein the first rake face forms a first rake angle α with the upper surface at the circular arc edge of 10 to 30 °, and the radius R1 of the circular arc surface is 0.5 to 2 mm.

6. The double-sided indexable cutting insert of claim 5 wherein the first rake surface forms a first rake angle α of 20 ° with the upper surface at the radiused edge, and the radiused surface has a radius R1 of 1 mm.

7. The double-sided indexable cutting insert of claim 5 wherein the first rake surface is divided into a first portion, a second portion and a third portion in that order at the cutting edge, the first portion forming a rake angle β with the upper surface of 10 ° to 30 ° β of 10 ° to 30 ° and β > α; the second portion is arc-shaped, and the third portion forms a rake angle theta with the upper surface of 10-30 degrees, and theta is alpha.

8. The double-sided indexable cutting insert of claim 5 wherein a radius R2 of the circular arc surface between the first portion of the first rake surface at the cutting edge and the land plane is 0-1 mm, a radius R3 of the circular arc surface between the third portion and the land plane is 0-1 mm, and R3> R2.

9. The double-sided indexable cutting insert of claim 5 wherein the first portion of the first rake surface has a length of 1mm to 5mm and the second portion has a length of 0 mm to 2 mm.

10. The double-sided indexable cutting insert of claim 5 wherein the first portion and the second portion on the first rake surface have a constant width.