Indexable turning blade with excellent strength

Abstract

The indexable turning blade is excellent in strength and comprises a blade body, the blade body comprises a rhombic lower surface and a rhombic upper surface, the lower surface is smaller than the upper surface, the lower surface and the upper surface are connected to form four blade faces, acute-angle cutting blades are formed at the joints of the four blade faces and the four edges of the upper surface respectively, and the cutting blades are arranged on the blade body. Four cutting edges are formed on the blade main body and can be repeatedly used by rotating or overturning; the upper surface is sunken downwards to form four chip breaker grooves close to the cutting edges; a mounting hole is formed in the center of the blade body, and the blade body is of an indexable symmetrical structure. The blade body is made of high-strength hard alloy materials. The blade main body is made of a high-strength material, has excellent wear resistance and impact resistance, and is particularly suitable for a high-strength cutting environment. The blade main body can be used for multiple times of transposition through rotation or overturning, cutting edge resources are fully utilized, and the tool replacement frequency and the machining cost are reduced. The design of the chip breaker groove effectively controls fracture and discharge of cuttings.

Description

Technical Field

[0001] The utility model relates to the technical field of turning inserts, in particular to an indexable turning insert with excellent strength. Background Art

[0002] With the development of industrial manufacturing technology, the requirements for turning tools are gradually increasing. Existing turning inserts are widely used in metal processing, especially when turning materials such as stainless steel, steel, and cast iron. The performance of the inserts directly affects the processing efficiency and quality. However, existing inserts are prone to wear, breakage, and chip blockage under high-intensity or long-term cutting conditions, affecting processing quality and production efficiency. In addition, many turning inserts do not adopt an indexable design, which prevents them from fully utilizing the cutting edge, increasing the frequency of insert replacement and processing costs.

[0003] Existing turning inserts typically utilize a single cutting edge, resulting in a short service life and prone to wear under high loads. The chipbreaker shapes and angles designed on the insert surface often fail to meet diverse cutting conditions, resulting in poor chip handling. Therefore, designing a high-strength turning insert with indexable, multi-edge features and optimized chipbreaker design is crucial for improving machining efficiency, extending tool life, and reducing costs. Utility Model Content

[0004] In view of this, the utility model provides an indexable turning insert with excellent strength.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An indexable turning insert with excellent strength includes an insert body, the insert body including a rhombus-shaped lower surface and an upper surface, the lower surface being smaller than the upper surface, the lower surface and the upper surface being connected to form four cutting edges, the four cutting edges respectively forming sharp-angled cutting edges at the connections with the four sides of the upper surface, so that the insert body is formed with four cutting edges and can be used multiple times by rotation or flipping; the upper surface is recessed downward to form four chip breaking grooves near the cutting edges; a mounting hole is provided in the center of the insert body, and the insert body is a symmetrical structure of indexable design; the insert body is made of high-strength cemented carbide material.

[0007] In the preferred technical solution, two grooves connecting the chip breaker groove and the mounting hole are provided on the upper surface, the grooves are in a "V"-shaped structure, and the grooves simultaneously connect two adjacent chip breaker grooves.

[0008] In the preferred technical solution, the four chip breaker grooves are a continuous structure recessed in the upper surface. The chip breaker grooves are designed with a gradient depth and have an arc surface structure. The curvature and depth of the chip breaker grooves are optimized by the cutting parameters, which can effectively control the flow direction of the chips under different cutting conditions.

[0009] In the preferred technical solution, the mounting hole has a standardized aperture, and the periphery of the mounting hole is treated with a stress dispersion structure to increase the stability of the blade body under high-load cutting conditions.

[0010] In the preferred technical solution, the surface of the blade body is treated with brightening and polishing, and the surface of the blade body is treated with a high-temperature resistant and anti-oxidation coating.

[0011] In a preferred technical solution, the thickness of the blade body is greater than 5 mm, and the thickness of the cutting edge is 0.5 mm to 1.5 mm.

[0012] In the preferred technical solution, the connection area between the cutting edge and the blade surface is optimized in thickness and adopts a micro-inclination angle of 0.2 mm or a rounded transition design.

[0013] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:

[0014] The insert body is constructed of high-strength material, offering excellent wear and impact resistance, making it particularly suitable for high-intensity cutting environments. The insert body can be rotated or flipped for multiple rotations, fully utilizing the cutting edge and reducing tool change frequency and machining costs. The chipbreaker design effectively controls chip breakage and discharge, preventing chip blockage and entanglement, improving machining efficiency and stability. A standardized mounting hole in the center of the insert ensures easy and secure installation in the toolholder system, enhancing cutting accuracy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 .

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 .

[0018] Reference numerals: 100, insert body; 110, lower surface; 120, upper surface; 130, blade face; 101, cutting edge; 121, chip breaker; 102, mounting hole; 122, groove type. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0020] In the description of this application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0022] An indexable turning insert with excellent strength, see Figure 1 、 2 , including a blade body 100, the blade body includes a diamond-shaped lower surface 110 and an upper surface, the lower surface 110 is smaller than the upper surface 120, and the lower surface 110 and the upper surface 120 are connected to form four cutting edges 130. Since the lower surface 110 is smaller than the upper surface 120, the four cutting edges 130 on the blade body 100 are inclined structures, and the four cutting edges 130 are connected to the four sides of the upper surface 120 to form sharp-angled cutting edges 101, so that the blade body 100 is formed with four cutting edges 101. It can be used multiple times by rotating or flipping, thereby extending the service life of the blade and reducing production costs. The upper surface 120 is recessed downward to form four chip breaking grooves 121 near the cutting edge 101, which can effectively control the breakage and discharge of chips during processing. A mounting hole 102 is provided in the center of the blade body 100, and the blade body 102 is installed on the turning tool of the lathe through the mounting hole 102. The blade body 100 is a symmetrical structure with an indexable design to ensure consistent processing effects when flipped for use. The blade body 100 is made of high-strength cemented carbide material to ensure strength and ensure that the blade body 100 is suitable for cutting a variety of metal materials, including steel, cast iron, stainless steel and other metal materials.

[0023] Furthermore, the upper surface 120 is provided with two grooves 122 connecting the chip breaker groove 121 and the mounting hole 102, and the groove 122 is a "V"-shaped structure, and the groove 122 simultaneously connects two adjacent chip breaker grooves 121; the four chip breaker grooves 121 are a continuous structure recessed in the upper surface 120, and the chip breaker groove 121 is a depth gradient design and has an arc surface structure. The curvature and depth of the chip breaker groove 121 are optimized by the chip parameters, which can effectively control the flow direction of the chips under different cutting conditions. The chip breaker groove 121 is a long arc structure as a whole with a width range of 0.2mm-0.6mm. The curvature of the groove mouth is small to form a sharp chip breaking point, and the curvature of the groove bottom is large to facilitate smooth chip discharge. The chip breaker grooves 121 of different widths adapt to different feed rates and cutting depth requirements through different widths; in the process of chips being discharged in the chip breaker groove 121, a part of them is discharged through the groove 122 to ensure that the chips are not blocked and maintain a smooth chip flow. The depth and curvature of the chip breaker groove 121 are usually precisely manufactured through mold processing to ensure the accuracy of the gradient structure, so as to adapt to various cutting conditions. During the blade design stage, the chip flow under different groove depths and curvatures is simulated through finite element analysis (FEA) and fluid dynamics simulation (CFD), and the groove depth and curvature are optimized to adapt to different materials and working conditions. In actual production, the blade is tested by trial cutting workpieces of different materials (such as steel, cast iron and stainless steel) to adjust the depth and curvature of the chip breaker groove to ensure that the chip breaking effect and chip removal smoothness are optimal. Through the gradient depth design of the chip breaker groove and the optimized curvature structure, the blade can automatically adapt to the chip flow direction according to the cutting conditions, maintain processing stability, effectively reduce problems such as chip blockage and entanglement, and improve processing efficiency and workpiece surface quality.

[0024] Furthermore, the mounting hole 102 has a standardized aperture, and the periphery of the mounting hole 102 is treated with a stress-dispersing structure to enhance the blade's stability under high-load cutting conditions. The surface of the blade body 100 undergoes a brightening polishing treatment to reduce the coefficient of friction. The surface of the blade body 100 is treated with a highly resistant oxidation coating. This coating utilizes a multi-layer composite structure, including materials such as TiAlN (titanium aluminum nitride), TiCN (titanium carbonitride), and Al2O3 (aluminum oxide). This layered deposition ensures the coating possesses wear resistance, oxidation resistance, and thermal shock resistance during high-temperature cutting. The total coating thickness is controlled between 2-5 microns to ensure that the wear resistance does not affect the blade's sharpness. The Al2O3 layer is approximately 1-2 microns, and the TiAlN layer is approximately 0.5-1 micron, ensuring oxidation resistance and wear resistance under high-temperature conditions. To enhance the blade's cutting smoothness and prevent chip adhesion, the surface after coating undergoes an ultra-precision polishing treatment to achieve a low-friction surface, improve chip removal efficiency, and reduce heat generated during cutting. The multi-layer coating structure can still maintain stable wear resistance and oxidation resistance under high temperature conditions of 800-1000℃, extending the service life of the blade in high temperature and high speed cutting.

[0025] Furthermore, the thickness of the blade body 100 is greater than 5mm. The overall thickness of the blade body 100 can achieve high strength without generating significant resistance to chip removal during the cutting process, and is suitable for processing needs of various materials; the thickness of the cutting edge 101 is 0.5-1.5mm. This thickness distribution can enhance the impact resistance during cutting and ensure that the blade can cope with instantaneous high loads; the connection area between the cutting edge 101 and the blade surface 120 has been optimized in thickness and adopts a micro-tilt angle or rounded transition design of 0.2mm; ensuring that the cutting edge can effectively reduce the occurrence of cracks or chipping when encountering harder workpieces or intermittent cutting.

[0026] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An indexable turning insert with excellent strength, characterized by: The invention comprises a blade body (100), wherein the blade body (100) comprises a rhombus-shaped lower surface (110) and an upper surface (120), wherein the lower surface (110) is smaller than the upper surface (120), and the lower surface (110) and the upper surface (120) are connected to form four blade faces (130), and the four blade faces (130) are respectively connected to the four sides of the upper surface (120) to form sharp-angled cutting edges (101), so that the blade body (100) is formed with four cutting edges (101), which can be used multiple times by rotating or flipping; the upper surface (120) is recessed downward to form four chip breaker grooves (121) near the cutting edge (101); a mounting hole (102) is provided in the center of the blade body (100), and the blade body (100) is a symmetrical structure with an indexable design; the blade body (100) is made of high-strength cemented carbide material.

2. The indexable turning insert with excellent strength according to claim 1, characterized in that: The upper surface (120) is provided with two grooves (122) connecting the chip breaker grooves (121) and the mounting hole (102), the grooves (122) are in a "V"-shaped structure, and the grooves (122) simultaneously connect two adjacent chip breaker grooves (121).

3. The indexable turning insert with excellent strength according to claim 1, characterized in that: The four chip breaker grooves (121) are a continuous structure recessed in the upper surface (120); the chip breaker grooves (121) are designed with a gradual depth change and have an arc surface structure; the curvature and depth of the chip breaker grooves (121) are optimized by cutting parameters, and can effectively control the flow direction of chips under different cutting conditions.

4. The indexable turning insert with excellent strength according to claim 1, characterized in that: The mounting hole (102) has a standardized aperture, and the periphery of the mounting hole (102) is treated with a stress dispersion structure to increase the stability of the blade body (100) under high-load cutting conditions.

5. The indexable turning insert with excellent strength according to claim 1, characterized in that: The surface of the blade body (100) is treated with a brightening and polishing process, and the surface of the blade body (100) is treated with a high-anti-oxidation coating.

6. The indexable turning insert with excellent strength according to claim 1, characterized in that: The thickness of the blade body (100) is greater than 5 mm, and the thickness of the cutting edge (101) is 0.5 mm to 1.5 mm.

7. The indexable turning insert with excellent strength according to claim 1, characterized in that: The connection area between the cutting edge (101) and the blade surface (130) is optimized in thickness and adopts a 0.2 mm micro-inclination angle or a rounded corner transition design.

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