Indexable cutting insert
By providing a side anti-chip stage with multiple hyperbolic projections on the indexable cutting insert, the problem of difficult chip curling is solved, the cutting force and heat are reduced, and the surface quality of the workpiece is ensured.
Patent Information
- Application Number
- CN202510332066.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2045-03-20
AI Technical Summary
When cutting low-carbon steel, chip curling is difficult to control, especially when the chip curling is small and large-cut deep, it is difficult to curl and break, and it is easy to scratch the processed surface, making it difficult to adapt to chip curling and breaking with small and large-cut deep and large-cut deep.
An indexable cutting insert is designed, and a side anti-chip stage with multiple hyperbolic protrusions arranged linearly. The chips flow through the protrusions of different curved surfaces for crimping and breaking, reducing the chip contact area and cutting force, and curling the chip direction away from the workpiece to avoid scratching the processed surface.
It realizes effective curling and breaking of chips during small feed and large feed depth, reduces cutting force and heat, and ensures the quality of the processed surface of the workpiece.
Smart Images
Figure CN119839329B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cutting blades for metal cutting, and particularly to an indexable cutting blade. Background Art
[0002] The metal cutting process is a process of interaction between the workpiece and the cutting tool. During medium machining, there are often problems such as large cutting force, high cutting heat, short tool life, and difficult control of chip curling. Especially when cutting low-carbon steel, it is difficult to control the curling and breaking of chips. In addition, when the feed is small and the depth of cut is large, it is even more difficult for the chips to curl and break, and it is easy to form chaotic chips, scratch the machined surface, and is not conducive to chip cleaning. The current indexable cutting blades are difficult to simultaneously adapt to small feed and large depth of cut and large feed and large depth of cut for chip curling and breaking. Summary of the Invention
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an indexable cutting blade, which has the advantages of smaller chip contact area, smaller cutting force, and lower heat generation, and can simultaneously meet small feed and large depth of cut and large feed and large depth of cut for chip curling and breaking, and the chips will not scratch the machined surface of the workpiece.
[0004] The indexable cutting blade according to an embodiment of the present invention includes:
[0005] A cutting edge, which is formed at the boundary between the end face and the side face of the indexable cutting blade, and includes a side cutting edge and a corner cutting edge connected to the intersection of the side cutting edges;
[0006] A chip breaker platform, which is formed on the end face, and the chip breaker platform is connected to the cutting edge through a groove bottom surface, a slope surface, and a rib surface sequentially formed on the end face; the chip breaker platform includes a side chip breaker platform opposite to the side cutting edge, which is formed by linearly arranging a plurality of hyperbolic convex portions, and a corner chip breaker platform connected to the intersection of the side chip breaker platforms.
[0007] The indexable cutting blade according to the embodiment of the present invention has the following advantages: By providing the side chip breaker platform formed by linearly arranging a plurality of the hyperbolic convex portions, during cutting, when there is a small feed and a large depth of cut, the chip flows through one curved convex portion of the hyperbolic convex portions of the side chip breaker platform for curling and breaking. And compared with the traditional indexable cutting blade, the chip contact area is smaller, the cutting force is smaller, and the generated heat is lower. Similarly, when there is a large feed and a large depth of cut, the chip flows through the other curved convex portion of the hyperbolic convex portions of the side chip breaker platform for curling and breaking. And compared with the traditional indexable cutting blade, the chip contact area is smaller, the cutting force is smaller, and the generated heat is lower. Thus, the indexable cutting blade according to the embodiment of the present invention can simultaneously meet the requirements of chip curling and breaking for both small feed and large depth of cut and large feed and large depth of cut. During the cutting process, the provision of the side chip breaker platform can make the curling direction of the chip face away from the workpiece and curl towards the unprocessed surface direction, avoiding the chip from scratching the machined surface and ensuring the quality of the machined surface of the workpiece.
[0008] In some embodiments, the side chip breaker platform is sloped on the side facing the corresponding side cutting edge; the side chip breaker platform has a first end and a second end in the direction of the linear arrangement. The first end is connected to the corner chip breaker platform, the second end is far from the corner chip breaker platform, and the distance between the second end and the corresponding side cutting edge is greater than the distance between the first end and the corresponding side cutting edge.
[0009] In some embodiments, the heights of the plurality of hyperbolic convex portions are the same in the direction of the linear arrangement.
[0010] In some embodiments, each hyperbolic convex portion includes a first curved convex portion and a second curved convex portion. The position of the first curved convex portion is lower than the position of the second curved convex portion, and the first curved convex portion and the second curved convex portion are connected by a transitional concave portion.
[0011] In some embodiments, the radius of curvature of the first curved convex portion is smaller than the radius of curvature of the second curved convex portion.
[0012] In some embodiments, the first curved convex portion and the bottom surface of the groove are connected by a connecting concave portion.
[0013] In some embodiments, the radius of curvature of the transitional concave portion is RC, 0.2 mm ≤ RC ≤ 0.5 mm; the radius of curvature of the connecting concave portion is RD, 0.2 mm ≤ RD ≤ 0.5 mm.
[0014] In some embodiments, in the height direction, the flank face is lower than the side chip breaker platform, and at the same time, the flank face is lower than the first curved convex portion, and the bottom surface of the groove is lower than the flank face.
[0015] In some embodiments, taking the intersection point of the first curved surface convex portion and the horizontal direction of the groove bottom surface as the tangent point, a first curved surface tangent line tangent to the first curved surface convex portion is made, and the included angle between the first curved surface tangent line and the horizontal direction is B; taking the intersection point of the first curved surface convex portion and the second curved surface convex portion as the tangent point, a second curved surface tangent line tangent to the second curved surface convex portion is made, and the included angle between the second curved surface tangent line and the horizontal direction is C, where 30° ≤ B < C ≤ 50°.
[0016] In some embodiments, in the linear arrangement direction and in the direction gradually away from the corner chip breaker, the spacing between adjacent hyperbolic convex portions gradually increases, and the depth of the concave portion between adjacent hyperbolic convex portions gradually increases.
[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings
[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:
[0019] Figure 1 is a schematic diagram of the indexable cutting tool according to the embodiment of the present invention;
[0020] Figure 2 is a partially enlarged schematic diagram of the indexable cutting tool according to the embodiment of the present invention;
[0021] Figure 3 is Figure 2 the sectional view at N-N in
[0022] Figure 4 is Figure 2 the sectional view at M-M in
[0023] Reference Signs:
[0024] Indexable cutting insert 1000; cutting edge 1; side cutting edge 101; corner cutting edge 102; chip breaker 2; side chip breaker 201; corner chip breaker 202; hyperbolic convex portion 2011; first curved surface convex portion 2011a; second curved surface convex portion 2011b; transition concave surface portion 2011c; connecting concave surface portion 2011d; concave portion 2011e; first curved surface tangent line L1; second curved surface tangent line L2; end face 3; side face 4; groove bottom surface 5; ramp surface 6; flank surface 7; center mounting hole 8. Detailed Embodiments
[0025] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals designate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.
[0026] The indexable cutting insert 1000 of the embodiment of the present invention will be described below in conjunction with Figures 1 to 4 ...
[0027] As Figures 1 to 4 shown, the indexable cutting insert 1000 of the embodiment of the present invention includes a cutting edge 1 and a chip breaker 2.
[0028] The cutting edge 1 is formed at the boundary between the end face 3 and the side face 4 of the indexable cutting insert 1000, and includes a side cutting edge 101 and a corner cutting edge 102 connected to the intersection of the side cutting edges 101.
[0029] The chip breaker 2 is formed on the end face 3, and the chip breaker 2 is connected to the cutting edge 1 through a groove bottom surface 5, a ramp surface 6 and a rib surface 7 formed on the end face 3 in sequence. In this way, during cutting, the chip flows through the rib surface 7, the ramp surface 6, the groove bottom surface 5, and the side chip breaker 201, is curled and broken by the chip breaker 2. The chip breaker 2 includes a side chip breaker 201 opposite to the side cutting edge 101, which is formed by linearly arranging a plurality of hyperbolic convex portions 2011, and a corner chip breaker 202 connected to the intersection of the side chip breakers 201. In this way, during cutting, when the feed is small and the depth of cut is large, the chip flows through one curved convex portion of the hyperbolic convex portion 2011 (refer to the first curved convex portion 2011a below for curling and breaking), and compared with the traditional indexable cutting insert, the chip contact area is smaller, the cutting force is smaller, and the heat generated is lower. Similarly, when the feed is large and the depth of cut is large, the chip flows through another curved convex portion of the hyperbolic convex portion 2011 (refer to the second curved convex portion 2011b below for curling and breaking), and compared with the traditional indexable cutting insert, the chip contact area is smaller, the cutting force is smaller, and the heat generated is lower. Therefore, the indexable cutting insert 1000 of the embodiment of the present invention can simultaneously meet the requirements of small feed and large depth of cut and large feed and large depth of cut for chip curling and breaking. During the cutting process, the setting of the side chip breaker 201 can make the curling direction of the chip away from the workpiece and curl towards the unprocessed surface direction, avoiding the chip from scratching the machined surface and ensuring the quality of the machined surface of the workpiece.
[0030] It should be noted that a central mounting hole 8 is also provided on the end face 3 of the indexable cutting insert 1000 of the embodiment of the present invention, which is convenient for mounting the indexable cutting insert 1000 on the tool bar.
[0031] The indexable cutting insert 1000 according to the embodiment of the present invention has the following advantages: By providing the side chip breaker 201 formed by linearly arranging a plurality of hyperboloid convex portions 2011, during cutting, when the feed is small and the depth of cut is large, the chip flows through a curved convex portion (refer to the first curved convex portion 2011a below) of the hyperboloid convex portion 2011 for curling and breaking. Compared with the traditional indexable cutting insert, the chip contact area is smaller, the cutting force is smaller, and the heat generated is lower. Similarly, when the feed is large and the depth of cut is large, the chip flows through another curved convex portion (refer to the second curved convex portion 2011b below) of the hyperboloid convex portion 2011 for curling and breaking. Compared with the traditional indexable cutting insert, the chip contact area is smaller, the cutting force is smaller, and the heat generated is lower. Thus, the indexable cutting insert 1000 according to the embodiment of the present invention can simultaneously meet the requirements of small feed and large depth of cut and large feed and large depth of cut for chip curling and breaking. During the cutting process, the setting of the side chip breaker 201 can make the curling direction of the chip face away from the workpiece and curl towards the unprocessed surface, avoiding the chip from scratching the machined surface and ensuring the quality of the machined surface of the workpiece.
[0032] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 shown, the side chip breaker 201 is sloped on the side facing the corresponding side cutting edge; the side chip breaker 201 has a first end and a second end in the linearly arranged direction. The first end is connected to the corner chip breaker 202, and the second end is away from the corner chip breaker 202. The distance between the second end and the corresponding side cutting edge 101 is greater than the distance between the first end and the corresponding side cutting edge 101, that is, there is a certain angle A between the side chip breaker 201 and the corresponding side cutting edge 101. Thus, the chip space is greatly increased, which is suitable for when the depth of cut changes. A larger depth of cut requires a larger chip space and larger chip curling to break the chip. At the same time, the curling direction of the chip faces away from the workpiece and curls towards the unprocessed surface, avoiding the chip from scratching the machined surface and ensuring the quality of the machined surface of the workpiece.
[0033] Furthermore, the angle A between the side chip breaker 201 and the corresponding side cutting edge 101 is an acute angle, and the range of the angle A between the side chip breaker 201 and the side cutting edge 101 is: 15°≤A≤25°. Preferably, the angle A is 20°. Thus, the chip space is greatly increased, which is suitable for when the depth of cut changes. A larger depth of cut requires a larger chip space and larger chip curling to break the chip. At the same time, the curling direction of the chip faces away from the workpiece and curls towards the unprocessed surface, avoiding the chip from scratching the machined surface and ensuring the quality of the machined surface of the workpiece.
[0034] In some embodiments, as Figure 4As shown, the heights of multiple hyperbolic convex portions 2011 are the same in the linear arrangement direction. During cutting, the chip contact area is smaller, the cutting force is smaller, the heat generated is lower, and at the same time, it can meet the requirements of small feed and large cutting depth and large feed and large cutting depth with chip curling and breaking.
[0035] In some embodiments, as Figure 2 and Figure 3 shown, each hyperbolic convex portion 2011 includes a first curved convex portion 2011a and a second curved convex portion 2011b. The position of the first curved convex portion 2011a is lower than that of the second curved convex portion 2011b, and the first curved convex portion 2011a and the second curved convex portion 2011b are connected by a transition concave portion 2011c.
[0036] During cutting, the chip flows through the flank 7, the ramp surface 6, the bottom surface 5 of the groove, and the side chip breaker 201 for curling and breaking. Figure 3 The cross-section of a hyperbolic convex portion 2011 in the curved chip breaker 2 is shown, which is divided into a first curved convex portion 2011a and a second curved convex portion 2011b. When the feed is small and the cutting depth is large, the chip flows through the first curved convex portion 2011a for curling and breaking. Since the first curved convex portion 2011a is a curved convex structure, the chip curling contact area is smaller, the cutting heat generated is lower, and at the same time, the cutting force is smaller, thus improving the life of the indexable cutting insert 1000. When the feed is increased, the chip mainly flows through the second curved convex portion 2011b for curling and breaking. In addition to the aforementioned advantages, the transition concave portion 2011c between the first curved convex portion 2011a and the second curved convex portion 2011b has an effect of strengthening chip breaking.
[0037] In some embodiments, the radius of curvature of the first curved convex portion 2011a is smaller than that of the second curved convex portion 2011b. That is, the radius of curvature of the first curved convex portion 2011a is RA, and the radius of curvature of the second curved convex portion 2011b is RB, and RA < RB, so as to achieve better curling and breaking of the chip when the cutting feed changes.
[0038] In some embodiments, as Figure 2 and Figure 3 shown, the first curved convex portion 2011a and the bottom surface 5 of the groove are connected by a connecting concave portion 2011d, and the connecting concave portion 2011d has an effect of strengthening chip breaking.
[0039] In some embodiments, the radius of curvature of the transition concave surface 2011c is RC, where 0.2 mm ≤ RC ≤ 0.5 mm. This is because when the chip curls, if RC is too large, the contact area will increase, there will be insufficient clearance, the cutting heat generated will increase, and the tool life will be reduced. If RC is too small, it is easy to form sticking materials during product pressing. Therefore, it is more appropriate to set the range of RC between 0.2 and 0.5 mm. Preferably, RC is 0.25 mm. The radius of curvature of the connecting concave surface 2011d is RD, where 0.2 mm ≤ RD ≤ 0.5 mm. This is because when the chip curls, if RD is too large, the contact area will increase, there will be insufficient clearance, the cutting heat generated will increase, and the tool life will be reduced. If RD is too small, it is easy to form sticking materials during product pressing. Therefore, it is more appropriate to set the range of RD between 0.2 and 0.5 mm. Preferably, RD is 0.25 mm.
[0040] In some embodiments, such as Figure 2 and Figure 3 shown, in the height direction, the flank 7 is lower than the side chip breaker 201, which promotes the inflow of chips and their curling and breaking. At the same time, during the production process, when grinding the two end faces 3, it can avoid damaging the side cutting edge 101 and the corner cutting edge 102. Specifically, the height difference between the flank 7 and the side chip breaker 201 is H, where 0.1 ≤ H ≤ 0.3, and preferably 0.15. At the same time, the flank 7 is lower than the first curved surface protrusion 2011a so that chips can flow in for curling and breaking. The height difference between the flank 7 and the first curved surface protrusion 2011a is J, and the range is 0.05 ≤ J ≤ 0.15, and preferably 0.07. The bottom surface 5 of the groove type is lower than the flank 7, and there is a height difference K between the bottom surface 5 of the groove type and the flank 7. If K is too small, it is easy to form crater wear. If it is too large, the chip curling is not easy to break. The range of K is: 0.05 ≤ K ≤ 0.3, which is convenient for chip curling. Preferably, K is 0.2.
[0041] In some embodiments, such as Figure 3 shown, taking the intersection point of the horizontal direction of the first curved surface protrusion 2011a and the bottom surface 5 of the groove type as the tangent point, a first curved surface tangent line L1 tangent to the first curved surface protrusion 2011a is made. The angle between the first curved surface tangent line L1 and the horizontal direction is B; taking the intersection point of the first curved surface protrusion 2011a and the second curved surface protrusion 2011b as the tangent point, a second curved surface tangent line L2 tangent to the second curved surface protrusion 2011b is made. The angle between the second curved surface tangent line L2 and the horizontal direction is C, where 30° ≤ B < C ≤ 50°. In this way, the chips can be curled better. At the same time, the angle C between the second curved surface tangent line L2 and the horizontal direction is greater than the angle B between the first curved surface tangent line L1 and the horizontal direction, which is convenient for increasing the chip thickness and the chip curling radius during large feed and deep cut machining, and is convenient for the chip to curl and break.
[0042] In some embodiments, such as Figure 2 andFigure 4 As shown, in the linear arrangement direction and in the direction gradually away from the corner chip breaker 202, the spacing between adjacent hyperbolic convex portions 2011 gradually increases, and the depth of the concave portion 2011e between adjacent hyperbolic convex portions 2011 gradually increases. In this way, at large cutting depths, a larger chip space can be provided. The combined action of the concave portion 2011e between adjacent hyperbolic convex portions 2011 and the transition concave surface portion 2011c between the first curved convex portion 2011a and the second curved convex portion 2011b further enhances the curling and breaking of chips during large feed and large cutting depth, and at the same time promotes the chips to further flow towards the unprocessed surface of the workpiece, improving the surface quality of the workpiece. Optionally, the spacing between adjacent hyperbolic convex portions 2011 is L, where 0.3 ≤ L ≤ 0.55.
[0043] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. An indexable cutting insert, characterized in that, Comprising: A cutting edge formed at the boundary between the end face and the side face of the indexable cutting insert, and including a side cutting edge and a corner cutting edge connected to the intersection of the side cutting edges; A chip breaker platform formed on the end face, and the chip breaker platform is connected to the cutting edge through a groove bottom surface, a slope surface and a rib surface sequentially formed on the end face; the chip breaker platform includes a side chip breaker platform formed by linearly arranging a plurality of hyperbolic convex portions opposite to the side cutting edge and a corner chip breaker platform connected to the intersection of the side chip breaker platforms; each of the hyperbolic convex portions includes a first curved convex portion and a second curved convex portion, the position of the first curved convex portion is lower than the position of the second curved convex portion, and the first curved convex portion and the second curved convex portion are connected through a transition concave portion; the first curved convex portion is connected to the groove bottom surface through a connecting concave portion; the side chip breaker platform is sloped on the side facing the corresponding side cutting edge; the side chip breaker platform has a first end and a second end in the direction of the linear arrangement, the first end is connected to the corner chip breaker platform, the second end is far from the corner chip breaker platform, and the distance between the second end and the corresponding side cutting edge is greater than the distance between the first end and the corresponding side cutting edge; in the direction of the linear arrangement and gradually away from the corner chip breaker platform, the spacing between adjacent hyperbolic convex portions gradually increases, and the depth of the concave portion between adjacent hyperbolic convex portions gradually increases.
2. The indexable cutting insert according to claim 1, characterized in that, The heights of the plurality of hyperbolic convex portions are the same in the direction of the linear arrangement.
3. The indexable cutting insert according to claim 1, wherein, The radius of curvature of the first curved convex portion is smaller than the radius of curvature of the second curved convex portion.
4. The indexable cutting insert according to claim 1, characterized in that, The radius of curvature of the transition concave portion is RC, 0.2 mm ≤ RC ≤ 0.5 mm; the radius of curvature of the connecting concave portion is RD, 0.2 mm ≤ RD ≤ 0.5 mm.
5. The indexable cutting insert according to claim 1, characterized in that, In the height direction, the rib surface is lower than the side chip breaker platform, and at the same time, the rib surface is lower than the first curved convex portion, and the groove bottom surface is lower than the rib surface.
6. The indexable cutting insert according to claim 1, wherein, Taking the intersection point of the horizontal direction of the first curved convex portion and the groove bottom surface as the tangent point, a first curved surface tangent line tangent to the first curved convex portion is made, and the angle between the first curved surface tangent line and the horizontal direction is B; taking the intersection point of the first curved convex portion and the second curved convex portion as the tangent point, a second curved surface tangent line tangent to the second curved convex portion is made, and the angle between the second curved surface tangent line and the horizontal direction is C, wherein, 30° ≤ B < C ≤ 50°.
Citation Information
Patent Citations
Milling blade
CN113399723A
Fast feed milling blade and milling tool thereof
CN113399724A