Cutting insert

Abstract

A cutting insert (10) comprising a front face (21), an upper surface (22), a side face (24), a front cutting edge (23), and a side cutting edge (25), the upper surface (22) comprising a first front region (221) connected to the front cutting edge (23) and inclined downwards, a second front region (222) connected to the first front region (221) and inclined downwards, a first side region (225) connected to the side cutting edge (25) and inclined downwards, and a second side region (226) connected to the second front region (222) and inclined downwards, the second side area (226) is connected with the first side area (225) and inclines downwards, the end portion, close to the side cutting edge (25), of the joint of the first front area (221) and the second front area (222) is a first end portion (224), the end portion, close to the front cutting edge (23), of the joint of the first side area (225) and the second side area (226) is a second end portion (228), and the first end portion (224) is farther away from the front cutting edge (23) than the second end portion (228). The cutting insert (10) enables cuttings to be easily curled and smoothly discharged.

Description

cutting inserts Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to a cutting blade. Background Art

[0002] In some prior arts, a chip breaker groove is provided on the upper surface of the slotting insert, and a protrusion is provided on the chip breaker groove. When processing ordinary steel, alloy steel and other materials, in order to more easily control the chips, the protrusion is set relatively close to, or even close to, the cutting edge.

[0003] For example, in patent CN102596459B, the raised portion on the upper surface of the blade is relatively close to the cutting edge. This blade provides relatively good chip control when processing materials with moderate hardness, such as ordinary steel and alloy steel. However, when processing materials with lower hardness, such as mild steel and aluminum alloys, chip control by the blade is less than ideal due to the softer chips produced. Furthermore, because the raised portion is relatively close to the cutting edge, the space between the raised portion and the cutting edge for chip control is relatively small, making chip melting more likely to occur when processing materials such as mild steel and aluminum alloys.

[0004] Summary of the Invention

[0005] An object of the present invention is to provide a cutting insert that can easily curl chips and discharge them smoothly, thereby avoiding the phenomenon of chip melting.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A cutting blade extending from a front end to a rear end, comprising:

[0008] located in front of the front end,

[0009] an upper surface connected to the front face,

[0010] a side surface connected to the front surface and the upper surface,

[0011] a front cutting edge located at the intersection of the front face and the upper surface,

[0012] and side cutting edges located at the intersection of the side surfaces and the upper surface;

[0013] The upper surface comprises:

[0014] a first front region connected to the front cutting edge and inclined downwardly,

[0015] a second front area connected to the first front area and inclined downward,

[0016] a first side region connected to the side cutting edge and inclined downwardly,

[0017] a second side region connected to the first side region and inclined downward;

[0018] The end of the connection between the first front area and the second front area close to the side cutting edge is the first end.

[0019] The end portion of the connection between the first side region and the second side region close to the front cutting edge is the second end portion.

[0020] The first end is further away from the leading cutting edge than the second end.

[0021] In one embodiment, the connection between the first front region and the second front region is generally further away from the front cutting edge than the second end portion.

[0022] In one embodiment, the height of the first end portion is lower than that of the second end portion, and the first end portion is located below the second end portion.

[0023] In one embodiment, the first end portion is further away from the side cutting edge than the second end portion.

[0024] In one embodiment, the first front region and the second front region are respectively flat.

[0025] In one embodiment, the first side region and the second side region are respectively flat.

[0026] In one embodiment, the first side region includes a first outer portion and a second outer portion, wherein the second outer portion is further away from the front cutting edge than the first outer portion;

[0027] The second side region includes a first inner site and a second inner site, wherein the first inner site is connected to the first outer site, and the second inner site is connected to the second outer site;

[0028] The first outer portion and the first inner portion are further away from the front cutting edge than the second front region;

[0029] The width of the first outer bit is smaller than the width of the first inner bit, and the width of the second outer bit is larger than the width of the second inner bit.

[0030] In one embodiment, the first side region includes a third outer portion, the third outer portion being closer to the front cutting edge than the first outer portion;

[0031] The second side region includes a third inner portion, the third inner portion being closer to the leading cutting edge than the first inner portion;

[0032] The third inner portion is connected to the first front region and the second front region respectively, and a maximum width of the third inner portion is greater than a width of the third outer portion.

[0033] In one embodiment, the width of the first outer portion is smaller than the width of the first front region, and the width of the second outer portion is larger than the width of the first front region.

[0034] In one embodiment, a raised portion is provided on the upper surface between the two side cutting edges; the raised portion is long and narrow, extending from the back to the front, and the height of the raised portion gradually increases, and a peak is formed at the front end of the raised portion, and the front side surface of the peak gradually decreases and transitions to the second front area.

[0035] In one embodiment, the height of the peak is lower than the height of the side cutting edges.

[0036] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects: In the cutting tool of the present invention, the area of ​​the upper surface close to the front cutting edge includes a first front area and a second front area, and the upper surface forms multiple front areas between the front cutting edge. And the areas of the upper surface close to the side cutting edge all include a first side area and a second side area. Therefore, the multiple side areas and the multiple front areas increase the space on the upper surface. Moreover, the second front area is tilted more downward than the first front area, and the inclination angle of the second front area is larger than the inclination angle of the first front area. When the chips move in sequence along the multiple front areas and the multiple side areas, the chips have sufficient curling space, and the space for the chips to be curled is large, so that the chips can curl smoothly.

[0037] Moreover, the first end is farther away from the front cutting edge than the second end, so that the second side area is closer to the front cutting edge, and the second side area can contact the chips earlier, which helps the chips to curl inward, so that the chips can be discharged smoothly and avoid chip melting. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a perspective view of a cutting insert according to the present embodiment;

[0039] FIG2 is a perspective view of the cutting insert of this embodiment mounted on the shank;

[0040] FIG3 is a top view of the cutting insert shown in FIG1 ;

[0041] FIG4 is a bottom view of the cutting blade shown in FIG1 ;

[0042] FIG5 is a side view of the cutting insert shown in FIG1;

[0043] FIG6 is a side view of the cutting insert shown in FIG5;

[0044] FIG7 is an enlarged view of the M portion of the cutting insert shown in FIG1;

[0045] FIG8 is a partial enlarged view of the cutting portion shown in FIG3;

[0046] FIG9 is a cross-sectional view of the cutting blade shown in FIG3 along the AA direction;

[0047] FIG10 is a cross-sectional view of the cutting blade shown in FIG5 taken along the CC direction;

[0048] FIG11 is a top view of the cutting blade shown in FIG1 from another direction;

[0049] FIG12 is a cross-sectional view of the cutting insert shown in FIG11 along the FF direction;

[0050] FIG13 is a cross-sectional view of the cutting insert shown in FIG11 taken along the GG direction;

[0051] FIG14 is a schematic diagram of the working state of the cutting insert shown in FIG1 when used for grooving processing;

[0052] FIG15 is a schematic diagram of the working state of the cutting insert shown in FIG1 when used for shoulder groove processing;

[0053] FIG16 is a schematic diagram of the operation of the cutting insert shown in FIG1 when used for transverse drawing processing.

[0054] Description of the reference numerals is as follows: 10, cutting insert; 90, tool holder; 91, clamping structure; 92, screw; 1, main body; 11, upper side; 111, first mounting groove; 12, lower side; 121, second mounting groove; 2, cutting portion; 21, front face; 22, upper surface; 221, first front region; 222, second front region; 223, front connecting region; 224, first end; 225, first side region; 2251, first outer position; 2252, second outer position; 2253, third outer position; 226, second side region; 2261, first inner position; 2262, second inner position; 2263, third inner position; 227, side connecting region; 228, second end; 23, front cutting edge; 24, side face; 25, side cutting edge; 26, radius cutting edge; 27, raised portion; 271, peak; 30. Chips; 40. Workpiece; X, first inclination angle; Y, second inclination angle; Z, third inclination angle; W, fourth inclination angle. DETAILED DESCRIPTION

[0055] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative rather than limiting.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0057] Please refer to Figure 1, which shows a cutting blade 10 provided in the present application. The cutting blade 10 can be used for grooving and other processing on a workpiece. Specifically, the cutting blade 10 of this embodiment can be used to process materials with relatively low hardness, such as soft steel and aluminum alloy. The above-mentioned materials with relatively low hardness will produce softer chips during the cutting process. The cutting blade 10 of this embodiment can better handle the chips produced by the above-mentioned materials with relatively low hardness, making it easier to discharge the chips. It can be understood that the cutting blade 10 of this embodiment can also process materials with relatively high hardness. There is no limitation on the material of the workpiece to be processed by the cutting blade 10 here.

[0058] The cutting insert 10 extends from the front end to the rear end. That is, the longitudinal direction of the cutting insert 10 is the front-to-back direction. As shown in Figure 1, the cutting insert 10 of this embodiment is in the shape of a rod extending from the front end side (the lower left side in the figure) toward the rear end side (the upper right side in the figure) along the central axis. The cutting insert 10 of this embodiment has a main body 1 and two cutting parts 2 along the central axis. The two cutting parts 2 are located on either side of the main body 1.

[0059] Please refer to Figure 2. The main body 1 is used for fixed installation with the tool holder 90. Please refer to Figures 3 and 4 at the same time. The main body 1 extends along the central axis L. Please refer to Figures 5 and 6. The main body 1 includes an upper side 11 and a lower side 12. Among them, the upper side 11 is formed with a first mounting groove 111 extending along the central axis L. The lower side 12 is formed with a second mounting groove 121 extending along the central axis L. The shapes of the first mounting groove 111 and the second mounting groove 121 are compatible with the clamping structure 91 of the tool holder 90. The clamping structure 91 clamps and limits the upper side 11 and the lower side 12 of the main body 1 respectively. The clamping structure 91 fixes the cutting blade 10 to the tool holder 90 by means of a screw 92. In addition, the clamping force of the clamping structure 91 on the main body 1 of the chip cutting blade can also be adjusted by rotating the screw 92.

[0060] Two cutting portions 2 are located on either side of the main body 1. When the cutting insert 10 is mounted on the handle 90, one of the cutting portions 2 protrudes from the seat on the handle 90, allowing cutting to proceed. If one of the cutting portions 2 is worn out during cutting, the other can be replaced and continue cutting. The two cutting portions 2 may be of the same or different embodiments.

[0061] 1 , the cutting portion 2 includes a front surface 21 , an upper surface 22 , a front cutting edge 23 , a side surface 24 , and a side cutting edge 25 .

[0062] The front surface 21 is located at the front end of the cutting portion 2 . The upper surface 22 is connected to the front surface 21 .

[0063] The front cutting edge 23 is located at the intersection of the upper surface 22 and the front surface 21. The front cutting edge 23 functions as a main cutting portion during grooving and is used to perform longitudinal cutting on the outer surface of the workpiece.

[0064] The side surface 24 can be connected to the front surface 21 and the upper surface 22 respectively. There can be two side surfaces 24, which are respectively located on both sides of the upper surface 22 and the front surface 21.

[0065] The side cutting edge 25 is located at the intersection of the side surface 24 and the upper surface 22. There may also be two side cutting edges 25, one located on each side of the upper surface 22 of the cutting portion 2. The side cutting edge 25 is used to perform transverse cutting on the workpiece.

[0066] In other embodiments, according to different cutting requirements, there may be only one side cutting edge 25 , that is, the side cutting edge 25 may be provided at the intersection of the upper surface 22 and one of the side surfaces 24 .

[0067] In this embodiment, a rounded cutting edge 26 is provided at the transition between the front cutting edge 23 and the side cutting edge 25. The rounded cutting edge 26 allows for a smooth transition and continuity between the front cutting edge 23 and the side cutting edge 25. A pair of rounded cutting edges 26 are provided at each end of the front cutting edge 23, facing each other across the front cutting edge 23.

[0068] The workpiece is processed by the front cutting edge 23 and the side cutting edge 25 to form chips and form curled cuttings on the upper surface 22, and finally discharged from the upper surface 22.

[0069] From front to back, the upper surface 22 is sequentially arranged with a plurality of front regions starting from the front cutting edge 23. Each front region is a spatial region, which can be a curved surface with an arc, a straight inclined surface, or a combination of an inclined surface and a curved surface.

[0070] In the direction from the side cutting edge 25 toward the central axis L, the upper surface 22 has a plurality of side regions arranged sequentially starting from the side cutting edge 25. Each side region is a spatial region and can be a curved surface with an arc, a straight inclined surface, or a combination of inclined surfaces and curved surfaces.

[0071] Referring to Figures 7 and 8, in this embodiment, the upper surface 22 includes a first front region 221 and a second front region 222. The first front region 221 is connected to the front cutting edge 23 and is tilted downward. The second front region 222 is connected to the first front region 221, extending rearward from the first front region 221. Furthermore, the second front region 222 is tilted more downward than the first front region 221. In other words, the second front region 222 is tilted more downward than the first front region 221. Therefore, when chips move from the first front region 221 to the second front region 222, the second front region 222 has a larger space because it is tilted more downward, which is more conducive to chip curling and allows for smoother chip discharge. Furthermore, the provision of the first front region 221 can ensure the strength of the front cutting edge 23 and the overall rigidity of the cutting insert 10.

[0072] The junction between the first front region 221 and the second front region 222 is the front connecting region 223. The front connecting region 223 is a smooth transition surface that facilitates the movement of chips from the first front region 221 to the surface of the second front region 222. The end of the front connecting region 223 near the side cutting edge 25 is a first end 224. The first end 224 is located on both sides of the junction of the front connecting region 223.

[0073] Specifically, in this embodiment, the upper surface 22 further includes a first side region 225 and a second side region 226. The first side region 225 is connected to the side cutting edge 25 and is tilted downward. The first side region 225 extends from the side cutting edge 25 toward the central axis L, and the first side region 225 is tilted downward. The second side region 226 is connected to the first side region 225, extends from the first side region 225 toward the central axis L, and is tilted more downward than the first side region 225. In other words, the second side region 226 is tilted downward to a greater extent than the first side region 225. Therefore, when chips move from the first side region 225 to the second side region 226, since the second side region 226 is tilted more downward, the space in the second side region 226 is larger, which is more conducive to chip curling and allows the chips to be discharged more smoothly.

[0074] The junction between the first side region 225 and the second side region 226 is a side connecting region 227. The side connecting region 227 is a smooth transition surface to facilitate the movement of chips from the first side region 225 to the surface of the second side region 226. The end of the side connecting region 227 close to the front cutting edge 23 is a second end 228.

[0075] Specifically, in this embodiment, the first end 224 is further away from the front cutting edge 23 than the second end 228. Furthermore, the first end 224 is further away from the side cutting edge 25 than the second end 228. Therefore, the second side region 226 can contact the chip earlier than the second front region 222. The two sides of the chip can come into contact with the second side region 226 earlier, causing them to curl toward the central axis L under the influence of the second side region 226. Therefore, before the chip enters the second front region 222 and curls downward, the two sides of the chip are pre-curved upward, facilitating the overall curling process during cutting.

[0076] The front connecting region 223 is generally farther from the front cutting edge 23 than the second end 228. The front connecting region 223 and the front cutting edge 23 are approximately parallel to each other. Specifically, the distance between the front connecting region 223 and the front cutting edge 23 is greater than the distance between the second end 228 and the front cutting edge 23. Therefore, the second end 228 of the side connecting region 227 is closer to the front cutting edge 23. Consequently, when chips formed by the front cutting edge 23 transition from the first front region 221 to the second front region 222, chips on either side of the first front region 221 first contact the second end 228 and, after being constrained by the second end 228, transition toward the second front region 222.

[0077] Furthermore, to facilitate explanation of the inclination of the first front region 221, the second front region 222, the first side region 225, and the second side region 226, the first front region 221, the second front region 222, the first side region 225, and the second side region 226 are approximately considered to be inclined planes. That is, the first front region 221 and the second front region 222 are each flat. The first side region 225 and the second side region 226 are each flat. The downward inclination angle of this inclined plane can be used to specifically measure the inclination of the first front region 221, the second front region 222, the first side region 225, and the second side region 226. Specifically, for ease of explanation, referring to Figures 9 and 10, the downward inclination angle of the first front region 221 is the first inclination angle X. The downward inclination angle of the second front region 222 is the second inclination angle Y. The downward inclination angle of the first side region 225 is the third inclination angle Z. The downward inclination angle of the second side region 226 is the fourth inclination angle W. According to the above description, the first inclination angle X is smaller than the second inclination angle Y; the third inclination angle Z is smaller than the fourth inclination angle W.

[0078] Specifically, in this embodiment, the height of the first end portion 224 is lower than that of the second end portion 228, and the first end portion 224 is located below the second end portion 228. That is, the first inclination angle X of the first front region 221 is greater than the third inclination angle Z of the first side region 225. Specifically, the first inclination angle X ranges from 10° to 20°, and the third inclination angle Z ranges from 5° to 15°.

[0079] Furthermore, the second inclination angle Y is in the range of 15° to 30°, and the fourth inclination angle W is in the range of 15° to 30°.

[0080] Specifically, in this embodiment, the magnitude of the fourth inclination angle W significantly impacts the chip restraint effect. If the fourth inclination angle W is too small, the restraining portion of the front end of the second side region 226 will shift rearward, hindering chip restraint and curling. If the fourth inclination angle W is too large, the second side region 226 may not properly contact the chips, reducing the restraint effect.

[0081] Specifically, in this embodiment, when the fourth inclination angle W is 24°, the chip control effect is better. When the fourth inclination angle W is too large, the area of ​​the second side region 226 will become smaller.

[0082] Please refer to Figures 11, 12 and 13. Figure 12 is a cross-sectional view in the FF direction, and Figure 13 is a cross-sectional view in the GG direction. It can be seen that in section GG, as it moves away from the front cutting edge 23, the depth of the second front area 222 increases, the chip removal space is increased, and at the same time, the area of ​​contact between the second front area 222 and the chips also increases.

[0083] During the grooving process, the chips 30 will be discharged along the upper surface 22 of the first front area 221 and the second front area 222; at the same time, under the action of the first side area 225 and the second side area 226, the chips 30 on both sides will protrude due to the first side area 225 and the second side area 226, generating a reaction force, causing the chips 30 to bend upward.

[0084] In the process of the chips 30 being discharged from the FF section to the GG section, as the cross-sectional position of the second side area 226 increases, when the chips 30 contacts the second side area 226, as the contact position increases, the force exerted by the second side area 226 will also increase. Under the force of the second side area 226, the chips 30 are more likely to bend upward.

[0085] Referring again to Figures 7 and 8, the first side region 225 extends along the central axis L. From front to back, the first side region 225 includes a third outer portion 2253, a first outer portion 2251, and a second outer portion 2252. The third outer portion 2253 is closest to the front cutting edge 23. The first outer portion 2251 is located between the third outer portion 2253 and the second outer portion 2252. The second outer portion 2252 is further away from the front cutting edge 23 than the first outer portion 2251 and is the farthest from the front cutting edge 23.

[0086] The first side region 225 extends rearward from the front cutting edge 23 along the central axis L of the cutting insert 10, and the width of the first side region 225 gradually increases. "Width" herein refers to the distance along the side cutting edge 25 toward the central axis L. Specifically, the width of the third outer portion 2253 is smaller than the width of the first outer portion 2251, and the width of the first outer portion 2251 is smaller than the width of the second outer portion 2252.

[0087] The first outer portion 2251 is further away from the front cutting edge 23 than the second front region 222. Therefore, the first outer portion 2251 is located behind the second front region 222. The width of the first outer portion 2251 is smaller than the width of the first front region 221. Furthermore, the width of the second outer portion 2252 is greater than the width of the first front region 221.

[0088] The second side region 226 includes a first inner portion 2261 and a second inner portion 2262. The first inner portion 2261 is connected to the first outer portion 2251, and the second inner portion 2262 is connected to the second outer portion 2252. The width of the first outer portion 2251 is smaller than that of the first inner portion 2261.

[0089] The first outer portion 2251 and the first inner portion 2261 are further away from the front cutting edge 23 than the second front region 222. Furthermore, the width of the second outer portion 2252 is greater than the width of the second inner portion 2262. Along the central axis L, the widths of the first inner portion 2261 and the second inner portion 2262 decrease from front to back.

[0090] The side area will constrain the chips. The width change of the first side area 225, combined with the constraining effect of the second side area 226, will cause the chips to move from the first inner position 2261 to the second inner position 2262 in the direction away from the front cutting edge 23 in the second side area 226. The direction of the chips is gradually guided toward the center axis and finally discharged smoothly.

[0091] Specifically, in this embodiment, the second side region 226 further includes a third inner portion 2263. The third inner portion 2263 is closer to the front cutting edge 23 than the first inner portion 2261. The third inner portion 2263 is positioned opposite to the third outer portion 2253 and is connected to the third outer portion 2253.

[0092] The third inner portion 2263 smoothly connects the first front region 221, the second front region 222, and the second side region 226. One side of the third inner portion 2263, near the first side region 225, connects to the second side region 226. The other side of the third inner portion 2263 connects to the first front region 221 and the second front region 222. The maximum width of the third inner portion 2263 is greater than the width of the third outer portion 2253. The third inner portion 2263 is constructed as a curved surface with rounded corners. The third inner portion 2263 forms an inclined surface with a tilting tendency. This inclined surface helps guide chips for discharge in a single direction, preventing chip entanglement.

[0093] Specifically, the connection between the third inner portion 2263 and the first and second front regions is provided with a rounded surface, and the curvature radius R can be within the range of 0.1 mm ≤ R ≤ 0.2 mm. If the curvature radius R of the third inner portion 2263 is larger, the position of the second side region 226 will be moved rearward, away from the front cutting edge 23; at the same time, the area of ​​the second side region 226 will be reduced.

[0094] The provision of the third inner portion 2263 increases the area of ​​the second side region 226 and the second front region 222, while also ensuring that the second side region 226 is positioned forward, closer to the front cutting edge 23. During grooving, the second side region 226 can restrain chips earlier. Therefore, by effectively curling the chips, the cutting insert 10 facilitates chip removal without interfering with the grooved side of the workpiece.

[0095] The upper surface 22 of the cutting insert 10 is provided with a raised portion 27 between the cutting edges 25 on both sides. The raised portion 27 is provided at a central position on the upper surface 22 of the cutting insert 10. The raised portion 27 is located on the central axis of the cutting insert 10. The cutting edges 25 on both sides are symmetrically provided on both sides of the raised portion 27. The side area is provided between the raised portion 27 and the side cutting edges 25. Therefore, the raised portion 27 is at a moderate distance from the front cutting edge 23 and the side cutting edges 25 on both sides, and the chips can move relatively smoothly on the upper surface of the cutting insert 10. Therefore, the raised portion 27 helps to control the chips to be discharged in one direction better and is less likely to cause chips to be entangled.

[0096] The raised portion 27 is long and narrow and extends in the direction of the central axis. The height of the raised portion 27 changes gradually. The "height" in this article can be the distance in the up and down directions. Specifically, the height of the raised portion 27 gradually increases from the back to the front. A peak 271 is formed at the front end of the raised portion 27, and the front side of the peak 271 gradually decreases and transitions to the second front area 222. The height of the raised portion 27 at the peak 271 is higher, which is beneficial for the chips to pass through the first front area 221 and the second front area 222 to form a certain shape and curl in a certain direction at the peak 271 of the raised portion 27, which is beneficial for direct discharge.

[0097] The height of the peak 271 is lower than the height of the side cutting edges 25. The phrase "lower" here should be understood as meaning that the height of the peak 271 is close to and lower than the height of the side cutting edges 25. That is, in a side view of the cutting insert 10, the raised portion 27 is obscured by the side cutting edges 25. Furthermore, the intersection of the raised portion 27 and the second front region 222 ensures ample space for chip curling, helping to reduce chip adhesion.

[0098] The curling process of the chips generated by the cutting insert 10 is now described in combination with different working scenarios of the cutting insert 10, and the workpiece being processed is described by taking a cylinder as an example:

[0099] When the cutting insert 10 of this embodiment performs a grooving process on a cylindrical workpiece 40, please refer to Figure 14. The cutting insert 10 enters in the V direction perpendicular to the axial direction of the cylinder to perform the grooving process. The front cutting edge 23 of the cutting insert 10 contacts the workpiece, and the chips move from the front cutting edge 23 to the first front region 221. The first front region 221 is tilted downward, and the chips move diagonally downward along the first front region 221. When the chips pass through the first front region 221, the two sides of the chips first pass through the second end portions 228 located on both sides of the first front region 221. The second end portions 228 are closer to the front cutting edge 23, and the height of the second end portions 228 is also higher than that of the second front region 222. The two sides of the chips contact the second end portions 228 and are curled toward the center axis. The chips pass through the second end portions 228, and the two sides of the chips contact the second side regions 226. Chips enter through the third inner portion 2263 of the second side region 226. The third inner portion 2263 is connected to the third outer portion 2253. As the third outer portion 2253 gradually increases in size away from the front cutting edge 23, the distance between the two third inner portions 2263 on the left and right sides gradually decreases. Under the influence of the two third inner portions 2263, the chips 30 on both sides are bent upward along the plane of the third inner portion 2263 and squeezed toward the central axis. Furthermore, as the chips pass through the third inner portion 2263 and move backward along the first inner portion 2261 and the second inner portion 2262, the width from the first inner portion 2261 to the second inner portion 2262 gradually decreases, guiding the chips toward the central axis.

[0100] The chips continue to move along the central axis, passing through the first front region 221 and the second front region 222, and onto the front side of the front end of the protrusion 27. They then move upward along the front side to the peak 271. The protrusion 27 acts to cause the chips to curl upward and be discharged in a regular pattern. The chips are squeezed toward the central axis by various forces and are discharged in an upward curl, avoiding interference with the walls of the workpiece groove.

[0101] When the cutting insert 10 of this embodiment performs shoulder grooving on a cylindrical workpiece 40, as shown in Figure 15 , the cutting insert 10 is fed in a direction V perpendicular to the cylindrical axis to perform cutting. A portion of the front cutting edge 23 of the cutting insert 10 contacts the workpiece. The resulting chips, under the action of the third inner portion 2263, are bent upward along the plane of the third inner portion 2263 and squeezed toward the center axis. Chips near the center axis pass through the first front region 221 and the second front region 222 and move to the front side of the front end of the protrusion 27 or the inclined surface of the side end of the protrusion 27. They then move upward along the front side or inclined surface to the peak 271. Under the action of the protrusion 27, the chips are regularly curled upward and discharged. Under the action of the second side region 226 and the protrusion 27, the chips are pulled toward the center axis and ultimately discharged along the center axis.

[0102] When the cutting insert 10 of this embodiment performs a cross-draw process on a cylindrical workpiece 40, as shown in FIG16 , the cutting insert 10 is fed in a direction V parallel to the cylindrical axis to perform cutting. The side cutting edge 25 of the cutting insert 10 contacts the workpiece, and chips are translated from the side cutting edge 25 toward the first side region 225. The first side region 225 is tilted downward, and the chips curl diagonally downward along the first side region 225. The second side region 226 is tilted further downward relative to the first side region 225. This increases the space in the second side region 226, providing sufficient space for the chips to move within the second side region 226.

[0103] The width of the first side region 225 gradually increases as it moves away from the front cutting edge 23. Therefore, chips enter the second side region 226 at different times. Chips near the third outer position 2253 enter the second side region 226 first, while chips near the second outer position 2252 enter the second side region 226 later. Therefore, chips entering the third inner position 2263 have a larger space to move than chips entering the second inner position 2262. Consequently, due to the high front and low back profile of the protrusion 27, the chip curl radius at the third inner position 2263 is larger than that near the second inner position 2262. These differences allow chips to curl and be discharged away from the front cutting edge 23 without interfering with the workpiece surface. Therefore, the cutting portion 2 of the cutting blade 10 of this embodiment increases the chip accommodation space through the first front area 221 and the second front area 224 that is more downwardly inclined, the first side area 225 and the second side area 226 that is more downwardly inclined, ensuring that the chips have sufficient curling space, which is beneficial to reducing the occurrence of chip melting.

[0104] Moreover, the first end portion 224 is further away from the front cutting edge 23 than the second end portion 228, so that the second side region 226 is closer to the front cutting edge 23. The second side region 226 can contact the chips earlier, which helps the chips to curl inward, so that the chips can extend in a certain direction and be discharged smoothly, avoiding chip melting.

[0105] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A cutting blade, the cutting blade extending from the front end to the rear end, characterized in that: include: Located in front of the front end, an upper surface connected to the front face, A side surface connected to the front surface and the upper surface, a front cutting edge located at the intersection of the front face and the upper surface, and a side cutting edge located at the intersection of the side surface and the upper surface; The upper surface comprises: a first front region connected to the front cutting edge and inclined downwardly, a second front area connected to the first front area and inclined downward, a first side region connected to the side cutting edge and inclined downwardly, a second side region connected to the first side region and inclined downward; The end of the connection between the first front area and the second front area close to the side cutting edge is the first end. The end of the connection between the first side region and the second side region close to the front cutting edge is the second end. The first end is further away from the leading cutting edge than the second end.

2. The cutting insert according to claim 1, characterized in that The connection between the first front region and the second front region is generally further away from the front cutting edge than the second end portion.

3. The cutting insert according to claim 1, characterized in that The height of the first end portion is lower than that of the second end portion, and the first end portion is located below the second end portion.

4. The cutting insert according to claim 1, characterized in that The first end is further away from the side cutting edge than the second end.

5. The cutting insert according to claim 1, characterized in that The first front region and the second front region are respectively flat.

6. The cutting insert according to claim 1, characterized in that The first side region and the second side region are respectively flat.

7. The cutting insert according to claim 1, characterized in that The first side region includes a first outer portion and a second outer portion, wherein the second outer portion is further away from the front cutting edge than the first outer portion; The second side region includes a first inner site and a second inner site, wherein the first inner site is connected to the first outer site, and the second inner site is connected to the second outer site; The first outer position and the first inner position are further away from the front cutting edge than the second front region; The width of the first outer site is smaller than the width of the first inner site, and the width of the second outer site is larger than the width of the second inner site.

8. The cutting insert according to claim 7, characterized in that The first side region includes a third outer location that is closer to the front cutting edge than the first outer location; The second side region includes a third inner portion, the third inner portion being closer to the front portion than the first inner portion cutting edge; The third inner part is connected to the first front region and the second front region respectively, and the maximum width of the third inner part is greater than the width of the third outer part.

9. The cutting insert according to claim 7, characterized in that The width of the first outer site is smaller than the width of the first front region, and the width of the second outer site is larger than the width of the first front region.

10. The cutting insert according to claim 1, characterized in that A raised portion is provided on the upper surface between the two side cutting edges; the raised portion is long and narrow, extends from the back to the front, and the height of the raised portion gradually increases, and a peak is formed at the front end of the raised portion, and the front side surface of the peak gradually decreases and transitions to the second front area.

11. The cutting insert according to claim 10, characterized in that The height of the peak is lower than the height of the side cutting edges.

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