Cutting blade with sleeking edge

Abstract

The cutting blade with the sleeking edge comprises a blade body and a cutting unit, the blade body comprises an upper positioning face, a lower positioning face, side faces, a sleeking face and an arc face, the upper positioning face and the lower positioning face are connected through the multiple side faces, and the arc face is connected with the adjacent side faces through the sleeking face. And a cutting unit comprising a main cutting edge, an arc edge and a sleeking edge is formed. According to the cutting unit, the design that the multi-section sleeking edge is matched with the multi-section front angle is adopted, the quality requirement of the machined surface can be met no matter in small cutting depth or large cutting depth, and the problems that an existing cutting blade is low in cutting efficiency and high in workpiece surface roughness under multiple working conditions are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cemented carbide blades, and more particularly to a cutting blade with a wiper edge. Background Art

[0002] Conventional turning processes currently use conventional ISO carbide inserts. During machining, errors and vibrations in insert production can easily affect the surface roughness of the workpiece. Furthermore, the feed rate and workpiece surface roughness are mutually constrained, leading to a decrease in machining efficiency while maintaining the required surface roughness. Therefore, the use of a wiper edge in the insert reduces the surface roughness of the workpiece during cutting, thereby ensuring both surface quality and efficiency.

[0003] CN202210682265.9 discloses a wiper blade and a tool having the same. The wiper blade comprises a tool body (10), the tool body (10) comprising a cutting portion (20), the cutting portion (20) being used to perform cutting processing on a workpiece, the cutting portion (20) comprising a plurality of wiper blades (21), adjacent wiper blades (21) being connected by transition surfaces (30), and the secondary deflection angles of the plurality of wiper blades (21) being set differently. Adjacent wiper blades 21 are connected by transition arc surfaces 31 or transition planes. When adjacent wiper blades 21 are connected by transition arc surfaces 31, the transition arc surfaces 31 are tangent to the wiper blades 21. The shape of the wiper blades 21 is an arc or a straight line. When the shape of the wiper blades 21 is an arc, the second arc diameters of the wiper blades 21 are set to be the same, and the widths of the wiper blades 21 are set to be the same. This patent provides multiple wiper edges with different secondary rake angles, so that the wiper blade has a suitable wiper edge to polish the processed surface when it is installed on a variety of different tool holders or used to process workpieces of different shapes. Although this structure is effective under small cutting depth conditions, it has certain limitations under large cutting depth conditions and cannot guarantee the surface roughness of the workpiece under various working conditions. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a cutting blade with a wiper edge in view of the shortcomings of traditional carbide blades such as low cutting efficiency and high workpiece surface roughness often encountered in large cutting depth processing.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A cutting insert with a wiper edge, comprising a blade body and a cutting unit disposed at a top corner of the blade body, wherein a center positioning hole is provided at the geometric center of the blade body, and the blade body comprises an upper positioning surface, a lower positioning surface, side surfaces, a wiper surface, and an arc surface, wherein the upper positioning surface and the lower positioning surface are connected by a plurality of side surfaces, and the arc surface and the adjacent side surfaces are connected by the wiper surface; the side surfaces intersect with the upper positioning surface and / or the lower positioning surface to form a main cutting edge, the wiper surface intersects with the upper positioning surface and / or the lower positioning surface to form a wiper cutting edge, and the arc surface intersects with the upper positioning surface and / or the lower positioning surface to form an arc edge;

[0007] The cutting unit includes a main cutting edge, an arc edge, a wiper edge, a rake face and a chip breaker, the rake face connects the main cutting edge, the arc edge, the wiper edge and the chip breaker, and the rake face and the chip breaker form a chip breaker groove; the wiper edge includes a first wiper edge and a second wiper edge, the two sides of the arc edge are connected to the first wiper edge, the first wiper edge and the second wiper edge are connected, and the second wiper edge is connected to the main cutting edge, the angle between the straight line at the two end points of the first wiper edge and the main cutting edge is 25 to 35 degrees, and the angle between the straight line at the two end points of the second wiper edge and the main cutting edge is 2 to 5 degrees.

[0008] Furthermore, the distance W1 from the intersection of the second wiper edge and the main cutting edge to the intersection of the second wiper edge and the first wiper edge is 0.5-1.5 mm, and the distance W2 from the intersection of the second wiper edge and the main cutting edge to the arc edge vertex is 2-3 mm.

[0009] Furthermore, the arc radius of the first wiper edge and the second wiper edge is 10-20 mm.

[0010] Furthermore, the rake angle α formed between the rake face and the upper positioning surface or the lower positioning surface is 5° to 25°.

[0011] Furthermore, the rake face includes a first rake face and a second rake face, the first rake face and the upper positioning surface or the lower positioning surface form a rake angle α1 of 5° to 10°; the second rake face and the upper positioning surface or the lower positioning surface form a rake angle α2 of 10° to 25°.

[0012] Furthermore, the horizontal distance L1 of the first rake surface is 0.1-0.3 mm.

[0013] Furthermore, the vertical height H1 from the bottom of the chip breaker groove to the arc edge is 0.1-0.4 mm; the vertical distance H2 from the arc edge to the highest point of the chip breaker platform is 0.05-0.2 mm.

[0014] Furthermore, in a cross section of the chip breaker along the cutting unit angle bisector plane, a horizontal angle β between the chip breaker and the upper positioning surface or the lower positioning surface is 5 to 15°.

[0015] Furthermore, the first wiper edge and the second wiper edge are connected by a transition arc edge.

[0016] Furthermore, the top angle of the blade body where the cutting unit is located is 30 to 90 degrees.

[0017] Compared with the prior art, the beneficial effects are:

[0018] The present invention sets a wiper blade between the main cutting edge and the arc blade to improve the processing performance of the workpiece during cutting. Specifically, the wiper blade of the present invention adopts a multi-segment arc cutting edge, combined with a special edge structure design of a multi-segment rake face, which can ensure the quality requirements of the machined surface regardless of whether the cutting depth is small or large. When cutting at a large cutting depth, the blade feed of the present invention is divided into a stepped feed, which reduces the power requirements of the machine tool during processing, slows down the blade failure time, and improves the durability of the blade. When processing at a small cutting depth, the sharp multi-segment rake angle edge structure design of the present invention meets the processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the blade;

[0020] Figure 2 This is the front view of the blade.

[0021] Figure 3 It is a partial enlarged view of the cutting unit;

[0022] Figure 4 for Figure 3 A cross-sectional view of the blade shown along line HH;

[0023] Among them, 1 blade body, 2 upper positioning surface, 3 lower positioning surface, 4 side surface, 5 wiper edge, 51 first wiper edge, 52 second wiper edge, 5A wiper edge first rake face, 5B wiper edge second rake face, 6 chip breaker, 7 main cutting edge first rake face, 8 main cutting edge second rake face, 20 center positioning hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their 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 at least one of such features.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0028] Example 1

[0029] This embodiment provides a cutting insert with a wiper edge, comprising an insert body 1 and a cutting unit provided at a top corner of the insert body 1 .

[0030] The blade body 1 is a polygonal body, and a center positioning hole 20 is provided at the geometric center of the blade body 1. The blade body 1 includes an upper positioning surface 2, a lower positioning surface 3, side surfaces 4, a finishing surface, and an arc surface. The upper positioning surface 2 and the lower positioning surface 3 are connected by the four side surfaces 4, and the arc surface and the adjacent side surfaces 4 are connected by the finishing surface.

[0031] The cutting unit includes a main cutting edge, an arc edge, a wiper edge 5, a front cutting surface and a chip breaker 6, wherein the side surface 4 intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a main cutting edge, the wiper surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a wiper edge, and the arc surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form an arc edge.

[0032] The wiper edge 5 includes a first wiper edge 51 and a second wiper edge 52. The first wiper edge 51 and the second wiper edge 52 are connected on both sides of the circular arc edge. The first wiper edge 51 and the second wiper edge 52 are connected tangentially to the main cutting edge. The first wiper edge 51 and the second wiper edge 52 are circular arc edges. The angle between the two endpoints of the first wiper edge 51 and the main cutting edge is 25-35°, while the angle between the two endpoints of the second wiper edge 52 and the main cutting edge is 2-5°. The rake angle α formed between the rake face and the upper locating surface 2 or the lower locating surface 3 is 10-25°.

[0033] Example 2

[0034] This embodiment provides a cutting insert with a wiper edge, comprising an insert body 1 and a cutting unit provided at a top corner of the insert body 1 .

[0035] The blade body 1 is a polygonal body, and a center positioning hole 20 is provided at the geometric center of the blade body 1. The blade body 1 includes an upper positioning surface 2, a lower positioning surface 3, side surfaces 4, a finishing surface, and an arc surface. The upper positioning surface 2 and the lower positioning surface 3 are connected by the four side surfaces 4, and the arc surface and the adjacent side surfaces 4 are connected by the finishing surface.

[0036] The cutting unit includes a main cutting edge, an arc edge, a wiper edge 5, a front cutting surface and a chip breaker 6, wherein the side surface 4 intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a main cutting edge, the wiper surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a wiper edge, and the arc surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form an arc edge.

[0037] The wiper edge 5 includes a first wiper edge 51 and a second wiper edge 52. The first wiper edge 51 and the second wiper edge 52 are connected on both sides of the circular arc edge. The first wiper edge 51 and the second wiper edge 52 are connected tangentially to the main cutting edge. The first wiper edge 51 and the second wiper edge 52 are circular arc edges. The arc radius R1 of the first wiper edge 51 and the arc radius R2 of the second wiper edge 52 are 10 to 20 mm. The angle between the two endpoints of the first wiper edge 51 and the main cutting edge is 25 to 35 degrees, while the angle between the two endpoints of the second wiper edge 52 and the main cutting edge is 2 to 5 degrees. The distance W1 from the intersection of the second wiper edge 52 with the main cutting edge to the intersection of the second wiper edge 52 and the first wiper edge 51 is 0.5 to 1.5 mm, and the distance W2 from the intersection of the second wiper edge 52 with the main cutting edge to the apex of the circular arc edge is 2 to 3 mm.

[0038] The rake face includes a first rake face and a second rake face. The width of the first rake face connecting the main cutting edge, the wiper edge 5, and the arc edge is a horizontal distance L1 of 0.1 to 0.3 mm. The first rake face forms a rake angle α1 of 5° to 10° with the upper positioning surface 2 or the lower positioning surface 3. The second rake face forms a rake angle α2 of 10° to 25° with the upper positioning surface 2 or the lower positioning surface 3.

[0039] Example 3

[0040] This embodiment provides a cutting insert with a wiper edge, such as Figures 1 to 4 , including a blade body 1 and a cutting unit arranged at the top corner of the blade body 1.

[0041] The blade body 1 is a rhombus, with cutting units located at two opposing corners at an angle of 30 to 60 degrees. A center positioning hole 20 is located at the geometric center of the blade body 1. The blade body 1 includes an upper positioning surface 2, a lower positioning surface 3, side surfaces 4, a finishing surface, and an arc surface. The upper positioning surface 2 and the lower positioning surface 3 are connected by four side surfaces 4, and the arc surface and the adjacent side surface 4 are connected by a finishing surface.

[0042] The cutting unit includes a main cutting edge, an arc edge, a wiper edge 5, a front cutting surface and a chip breaker 6, wherein the side surface 4 intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a main cutting edge, the wiper surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a wiper edge, and the arc surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form an arc edge.

[0043] The wiper edge 5 includes a first wiper edge 51 and a second wiper edge 52. The first wiper edge 51 and the second wiper edge 52 are connected to each other on both sides by a transitional arc edge. The second wiper edge 52 is tangentially connected to the main cutting edge. The first and second wiper edges 51 and 52 are arc-shaped edges. The arc radius R1 of the first wiper edge 51 and the arc radius R2 of the second wiper edge 52 are 10 to 20 mm. The angle between the line connecting the two endpoints of the first wiper edge 51 and the main cutting edge is 25 to 35°, while the angle between the line connecting the two endpoints of the second wiper edge 52 and the main cutting edge is 2 to 5°. The distance W1 from the intersection of the second wiper edge 52 with the main cutting edge to the intersection of the second wiper edge 52 and the first wiper edge 51 is 0.5 to 1.5 mm, and the distance W2 from the intersection of the second wiper edge 52 with the main cutting edge to the apex of the arc edge is 2 to 3 mm.

[0044] The rake face includes a first rake face and a second rake face. The width of the first main cutting edge rake face 7 and the first wiper edge rake face 5A is a horizontal distance L1 of 0.1 to 0.3 mm. The first wiper edge rake face 5A forms a rake angle α1 of 10° to 25° with the upper positioning surface 2 or the lower positioning surface 3. The first main cutting edge rake face 7 is connected to the second main cutting edge rake face 8. The first wiper edge rake face 5A is connected to the second wiper edge rake face 5B. The second wiper edge rake face 5B forms a rake angle α2 of 10° to 25° with the upper positioning surface 2 or the lower positioning surface 3.

[0045] The rake face and the chip breaker 6 form a chip breaker groove. In a cross section of the chip breaker 6 along the cutting unit angle bisector, the horizontal angle β between the chip breaker 6 and the upper positioning surface 2 or the lower positioning surface 3 is 5 to 15 degrees. The vertical height H1 from the bottom of the chip breaker groove to the arc edge is 0.1 to 0.4 mm; the vertical distance H2 between the arc edge and the highest point of the chip breaker 6 is 0.05 to 0.2 mm.

[0046] Example 4

[0047] This embodiment provides a cutting insert with a wiper edge, such as Figures 1 to 4 , including a blade body 1 and a cutting unit arranged at the top corner of the blade body 1.

[0048] The blade body 1 is a rhombus, with cutting units located at two opposing 45° corners. A center positioning hole 20 is located at the geometric center of the blade body 1. The blade body 1 includes an upper positioning surface 2, a lower positioning surface 3, side surfaces 4, a finishing surface, and an arc surface. The upper positioning surface 2 and the lower positioning surface 3 are connected by four side surfaces 4, and the arc surface and the adjacent side surface 4 are connected by a finishing surface.

[0049] The cutting unit includes a main cutting edge, an arc edge, a wiper edge 5, a front cutting surface and a chip breaker 6, wherein the side surface 4 intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a main cutting edge, the wiper surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form a wiper edge, and the arc surface intersects with the upper positioning surface 2 and / or the lower positioning surface 3 to form an arc edge.

[0050] The wiper edge 5 includes a first wiper edge 51 and a second wiper edge 52. The first wiper edge 51 and the second wiper edge 52 are connected to each other on both sides by a transitional arc edge. The second wiper edge 52 is tangentially connected to the main cutting edge. The first and second wiper edges 51 and 52 are arc-shaped edges. The arc radius R1 of the first wiper edge 51 and the arc radius R2 of the second wiper edge 52 are 10 to 20 mm. The angle between the two endpoints of the first wiper edge 51 and the main cutting edge is 32°, while the angle between the two endpoints of the second wiper edge 52 and the main cutting edge is 3°. The distance W1 from the intersection of the second wiper edge 52 with the main cutting edge to the intersection of the second wiper edge 52 and the first wiper edge 51 is 0.8 mm, and the distance W2 from the intersection of the second wiper edge 52 with the main cutting edge to the apex of the arc edge is 1.6 mm.

[0051] The rake face includes a first rake face and a second rake face. The width of the first main cutting edge rake face 7 and the first wiper edge rake face 5A is a horizontal distance L1 of 0.27 mm. The first wiper edge rake face 5A forms a rake angle α1 of 6° with the upper locating surface 2 or the lower locating surface 3. The first main cutting edge rake face 7 is connected to the second main cutting edge rake face 8. The first wiper edge rake face 5A is connected to the second wiper edge rake face 5B. The second rake face forms a rake angle α2 of 15° with the upper locating surface 2 or the lower locating surface 3.

[0052] The rake face and chip breaker 6 form a chip breaker groove. In a cross-section of the chip breaker 6 along the cutting unit angle bisector, the horizontal angle β between the chip breaker 6 and the upper positioning surface 2 or the lower positioning surface 3 is 13.5°. The vertical height H1 from the bottom of the chip breaker groove to the arc edge is 0.2 mm; the vertical distance H2 from the arc edge to the highest point of the chip breaker 6 is 0.1 mm.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A cutting insert with a wiper edge, characterized in that: The blade body comprises a cutting unit arranged at a top corner of the blade body, wherein a center positioning hole is provided at the geometric center of the blade body, and the blade body comprises an upper positioning surface, a lower positioning surface, a side surface, a finishing surface, and an arc surface, wherein the upper positioning surface and the lower positioning surface are connected by a plurality of side surfaces, and the arc surface and the adjacent side surface are connected by the finishing surface; the side surface intersects with the upper positioning surface and / or the lower positioning surface to form a main cutting edge, the finishing surface intersects with the upper positioning surface and / or the lower positioning surface to form a finishing cutting edge, and the arc surface intersects with the upper positioning surface and / or the lower positioning surface to form an arc cutting edge; The cutting unit includes a main cutting edge, an arc edge, a wiper edge, a rake face and a chip breaker, the rake face connects the main cutting edge, the arc edge, the wiper edge and the chip breaker, and the rake face and the chip breaker form a chip breaker groove; the wiper edge includes a first wiper edge and a second wiper edge, the two sides of the arc edge are respectively connected to the first wiper edge, the first wiper edge and the second wiper edge are connected, and the second wiper edge is connected to the main cutting edge, the angle between the straight line at the two end points of the first wiper edge and the main cutting edge is 25 to 35 degrees, and the angle between the straight line at the two end points of the second wiper edge and the main cutting edge is 2 to 5 degrees.

2. The cutting insert with a wiper edge according to claim 1, characterized in that: The distance W1 from the intersection of the second wiper edge and the main cutting edge to the intersection of the second wiper edge and the first wiper edge is 0.5-1.5 mm, and the distance W2 from the intersection of the second wiper edge and the main cutting edge to the arc edge vertex is 2-3 mm.

3. The cutting insert with a wiper edge according to claim 1 or 2, characterized in that: The arc radius of the first wiper edge and the second wiper edge is 10-20 mm.

4. The cutting insert with a wiper edge according to claim 1, wherein: The front angle α formed by the rake face and the upper positioning surface or the lower positioning surface is 5° to 25°.

5. The cutting insert with a wiper edge according to claim 1 or 4, characterized in that: The rake face includes a first rake face and a second rake face. The first rake face forms a rake angle α1 of 5° to 10° with the upper positioning surface or the lower positioning surface. The second rake face forms a rake angle α2 of 10° to 25° with the upper positioning surface or the lower positioning surface.

6. The cutting insert with a wiper edge according to claim 5, characterized in that: The horizontal distance L1 of the first rake face is 0.1-0.3 mm.

7. The cutting insert with a wiper edge according to claim 1, characterized in that: The vertical height H1 from the bottom of the chip breaker groove to the arc edge is 0.1-0.4 mm; the vertical distance H2 from the arc edge to the highest point of the chip breaker platform is 0.05-0.2 mm.

8. The cutting insert with a wiper edge according to claim 1, wherein: In the cross section of the chip breaker along the cutting unit angle bisector, the horizontal angle β between the chip breaker and the upper positioning surface or the lower positioning surface is 5 to 15 degrees.

9. The cutting insert with a wiper edge according to claim 1, wherein: The first wiper edge and the second wiper edge are connected by a transition arc edge.

10. The cutting insert with a wiper edge according to claim 1, wherein: The top angle of the blade body where the cutting unit is located is 30 to 90 degrees.

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