A multi-edge turning insert

Abstract

The application discloses a multi-blade turning tool piece, which comprises a tool piece body, the tool piece body is projected in a rectangular shape, and comprises upper and lower mounting surfaces and side mounting surfaces; the side mounting surfaces comprise side mounting surface one and side mounting surface two; the side mounting surface one is matched with a tool piece mounting seat, the side mounting surface two is connected with the upper and lower mounting surfaces to form a cutting edge, a plurality of protruding cutting teeth are arranged on the cutting edge; the upper and lower mounting surfaces are provided with chip removal grooves at the cutting teeth, the chip removal grooves are provided with chip breaking tables, and the chip breaking tables are outwardly protruded. The application is provided with the chip breaking tables in the chip removal grooves, the chip removal grooves can guide the movement of the chips in the groove direction, the protruded chip breaking tables increase the resistance of the chips in the movement direction, the chips are broken, the workpiece surface scratching phenomenon caused by the too long chips is avoided, meanwhile, the chip removal and breaking of the application are more smooth, and the tool piece wear caused by the high-temperature accumulation due to the poor chip removal is avoided.

Description

Technical Field

[0001] This utility model relates to a turning tool, and more specifically, to a multi-bladed turning tool. Background Technology

[0002] Currently, most multi-blade turning tools used for machining crankshafts made of steel have a flat plate structure. They remove chips by designing chip grooves on the rake face, which results in good chip removal. However, their chip control or chip breaking ability is insufficient, often leading to excessively long chips that accumulate and scratch the workpiece.

[0003] Application number CN201621198580.0 discloses a multi-blade turning and broaching insert for machining crankshaft journals, including an insert body, a tool mounting hole on the insert body, and cutting edges on two cutting surfaces of the insert body. The insert body is a flat insert body, and multiple identical protrusions are provided on both cutting surfaces of the insert body. The top of each protrusion is a cutting edge, and a gap is left between each pair of adjacent protrusions. The cutting edge of the cutting edge is higher than the surface of the gap. The multi-blade turning and broaching insert of this application does not have a structural design for chip removal and chip breaking. During machining, chip accumulation is very likely to occur, causing scratches on the workpiece surface. At the same time, the accumulation of chips will cause heat to accumulate on the insert, making the insert prone to high-temperature wear. Utility Model Content

[0004] To address the problem of workpiece surface scratches caused by the accumulation of excessively long chips during crankshaft machining, this utility model provides a multi-blade turning tool.

[0005] The technical solution of this utility model is: A multi-blade lathe insert includes an insert body with a rectangular outline, comprising two parallel upper and lower mounting surfaces and a side mounting surface connecting the two upper and lower mounting surfaces; the upper and lower mounting surfaces are provided with screw mounting and positioning holes penetrating the insert body; the side mounting surface includes a first side mounting surface perpendicular to the short side of the upper and lower mounting surfaces and a second side mounting surface perpendicular to the long side of the upper and lower mounting surfaces; the first side mounting surface mates with an insert mounting base, and the connection between the second side mounting surface and the upper and lower mounting surfaces forms a cutting edge, the cutting edge being provided with multiple protruding cutting teeth; the upper and lower mounting surfaces are provided with chip removal grooves at the cutting teeth, and chip breaker platforms are provided within the chip removal grooves, the chip breaker platforms protruding outwards.

[0006] Furthermore, the outwardly protruding shape of the chip breaking platform resembles a triangle, with the three sides of the triangle curving downwards and connecting to the chip removal groove.

[0007] Furthermore, a chip-receiving groove is provided between the edge of the chip breaker and the chip removal groove, and the chip-receiving groove connects the cutting edge and the chip breaker.

[0008] Furthermore, the protrusion height of the chip breaking stage is 0.15~0.3mm.

[0009] Furthermore, the number of cutting teeth on the cutting edge is 3 to 7.

[0010] Furthermore, the spacing between two adjacent cutting teeth is equal.

[0011] Furthermore, the first cutting tooth on the cutting edge is located at one end of the blade body, and the last tooth is located at the other end of the blade body.

[0012] Furthermore, the outer surface of the blade body is coated with a wear-resistant coating.

[0013] Furthermore, the blade body is made of cemented carbide.

[0014] Furthermore, the height difference between the lowest and highest points of the chip removal groove is 0.2~0.4mm.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a chip removal groove at the chip removal point of the cutting edge, and a chip breaking platform within the groove. During the machining of the outer diameter of a crankshaft, the chip removal groove guides the chips to move along the groove direction, and the raised chip breaking platform increases the resistance of the chips in the direction of movement, causing the chips to break and preventing scratches on the workpiece surface caused by excessively long chips. At the same time, the cutting tool of this invention provides smoother chip removal and chip breaking than traditional cutting tools, avoiding tool wear caused by high temperature accumulation due to poor chip removal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a multi-blade lathe blade structure; Figure 2 A partial schematic diagram of the chip breaker stage for a multi-bladed lathe cutting tool; Figure 3 A front view of a multi-bladed lathe blade; Among them: 1. Upper and lower mounting surfaces; 2. Side mounting surface one; 3. Side mounting surface two; 4. Screw mounting positioning hole; 5. Cutting edge; 6. Cutting tooth; 7. Chip removal groove; 8. Chip breaking platform; 9. Chip receiving groove. Detailed Implementation

[0017] To clearly illustrate the technical features of this utility model, the following detailed description, in conjunction with the accompanying drawings, provides a comprehensive overview of the present utility model. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited to the specific embodiments disclosed below. Furthermore, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the present utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" and "second" can explicitly or implicitly include one or more of those features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this utility model, unless otherwise explicitly specified and limited, "on" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] Example 1 like Figures 1 to 3As shown, this embodiment provides a multi-blade lathe insert, including an insert body. The insert body has a rectangular outline and includes two parallel upper and lower mounting surfaces 1 and a side mounting surface connecting the two upper and lower mounting surfaces. The upper and lower mounting surfaces 1 are provided with screw mounting and positioning holes 4 that penetrate the insert body. Screws are inserted into the positioning holes and fixed to the insert mounting base. The side mounting surface includes a side mounting surface 1 (1) perpendicular to the short side of the upper and lower mounting surfaces and a side mounting surface 2 (2) perpendicular to the long side of the upper and lower mounting surfaces. The side mounting surface 1 mates with the insert mounting base and is locked in place by the screw. The connection between the side mounting surface 2 (2) and the upper and lower mounting surfaces 1 forms a cutting edge 5. The cutting edge 5 is provided with multiple protruding cutting teeth 6. The cutting teeth 6 contact the workpiece during machining to perform cutting operations. The upper and lower mounting surfaces 1 are provided with chip removal grooves 7 at the cutting teeth 6. Chip breaking platforms 8 are provided in the chip removal grooves 7 and protrude outwards.

[0019] The chip breaker 8 has an outwardly protruding shape similar to a triangle. The three sides of the triangle curve downwards and smoothly connect with the chip removal groove 7. The height difference between the lowest and highest points of the chip removal groove 7 is 0.4 mm. A chip receiving groove 9 is also provided between the chip breaker 8 and the edge of the chip removal groove 7. The chip receiving groove 9 is arc-shaped and connects the cutting edge 5 and the chip breaker 8. The protrusion height of the chip breaker 8 is 0.3 mm.

[0020] The first cutting tooth on the cutting edge 5 is located at one end of the insert body, and the last tooth is located at the other end of the insert body. The spacing between two adjacent cutting teeth 6 is equal, thereby ensuring that the amount of material removed by each cutting tooth 6 is consistent, and thus achieving consistent wear of each cutting tooth 6, avoiding the need to replace the entire insert due to wear of a single cutting tooth.

[0021] During machining, the crankshaft workpiece rotates axially on the lathe, and the multi-bladed cutting tool is clamped on the tool holder. The crankshaft is cut by the cutting tool moving radially on the workpiece. Each movement does not exceed the width of the cutting tooth 6, so continuous external turning can be performed. During cutting, the cutting tooth 6 squeezes the workpiece to form chips. The chips are guided into the chip removal grooves 7 on the upper and lower mounting surfaces through the arc-shaped chip grooves 9. At this time, the chips will come into contact with the chip breaking platform 8 in the chip removal groove 7. The chip breaking platform 8 creates resistance to the movement of the chips, causing the chips to break.

[0022] Example 2 like Figures 1 to 3As shown, this embodiment provides a multi-blade lathe insert, including an insert body. The insert body has a rectangular outline and includes two parallel upper and lower mounting surfaces 1 and a side mounting surface connecting the two upper and lower mounting surfaces. The upper and lower mounting surfaces 1 are provided with screw mounting and positioning holes 4 that penetrate the insert body. Screws are inserted into the positioning holes and fixed to the insert mounting base. The side mounting surface includes a side mounting surface 1 (1) perpendicular to the short side of the upper and lower mounting surfaces and a side mounting surface 2 (2) perpendicular to the long side of the upper and lower mounting surfaces. The side mounting surface 1 mates with the insert mounting base and is locked in place by the screw. The connection between the side mounting surface 2 (2) and the upper and lower mounting surfaces 1 forms a cutting edge 5. The cutting edge 5 is provided with multiple protruding cutting teeth 6. The cutting teeth 6 contact the workpiece during machining to perform cutting operations. The upper and lower mounting surfaces 1 are provided with chip removal grooves 7 at the cutting teeth 6. Chip breaking platforms 8 are provided in the chip removal grooves 7 and protrude outwards.

[0023] The chip breaker 8 has an outwardly protruding shape similar to a triangle. The three sides of the triangle curve downwards and smoothly connect with the chip removal groove 7. The height difference between the lowest and highest points of the chip removal groove 7 is 0.4 mm. A chip receiving groove 9 is also provided between the chip breaker 8 and the edge of the chip removal groove 7. The chip receiving groove 9 is arc-shaped and connects the cutting edge 5 and the chip breaker 8. The protrusion height of the chip breaker 8 is 0.3 mm.

[0024] The first cutting tooth on the cutting edge 5 is located at one end of the insert body, and the last tooth is located at the other end of the insert body. The spacing between two adjacent cutting teeth 6 is equal, thereby ensuring that the amount of material removed by each cutting tooth 6 is consistent, and thus achieving consistent wear of each cutting tooth 6, avoiding the need to replace the entire insert due to wear of a single cutting tooth.

[0025] Furthermore, the blade body is made of cemented carbide and coated with a wear-resistant coating, which further enhances its wear resistance and high-temperature resistance, and significantly increases its processing life.

[0026] During machining, the crankshaft workpiece rotates axially on the lathe, and the multi-bladed cutting tool is clamped on the tool holder. The crankshaft is cut by the cutting tool moving radially on the workpiece. Each movement does not exceed the width of the cutting tooth 6, so continuous external turning can be performed. During cutting, the cutting tooth 6 squeezes the workpiece to form chips. The chips are guided into the chip removal grooves 7 on the upper and lower mounting surfaces through the arc-shaped chip grooves 9. At this time, the chips will come into contact with the chip breaking platform 8 in the chip removal groove 7. The chip breaking platform 8 creates resistance to the movement of the chips, causing the chips to break.

[0027] Example 3 like Figures 1 to 3As shown, this embodiment provides a multi-blade lathe insert, including an insert body. The insert body has a rectangular outline and includes two parallel upper and lower mounting surfaces 1 and a side mounting surface connecting the two upper and lower mounting surfaces. The upper and lower mounting surfaces 1 are provided with screw mounting and positioning holes 4 that penetrate the insert body. Screws are inserted into the positioning holes and fixed to the insert mounting base. The side mounting surface includes a side mounting surface 1 (1) perpendicular to the short side of the upper and lower mounting surfaces and a side mounting surface 2 (2) perpendicular to the long side of the upper and lower mounting surfaces. The side mounting surface 1 mates with the insert mounting base and is locked in place by the screw. The connection between the side mounting surface 2 (2) and the upper and lower mounting surfaces 1 forms a cutting edge 5. The cutting edge 5 is provided with multiple protruding cutting teeth 6. The cutting teeth 6 contact the workpiece during machining to perform cutting operations. The upper and lower mounting surfaces 1 are provided with chip removal grooves 7 at the cutting teeth 6. Chip breaking platforms 8 are provided in the chip removal grooves 7 and protrude outwards.

[0028] The chip breaker 8 has an outwardly protruding shape similar to a triangle. The three sides of the triangle curve downwards and smoothly connect with the chip removal groove 7. The height difference between the lowest and highest points of the chip removal groove 7 is 0.4 mm. A chip receiving groove 9 is also provided between the chip breaker 8 and the edge of the chip removal groove 7. The chip receiving groove 9 is arc-shaped and connects the cutting edge 5 and the chip breaker 8. The protrusion height of the chip breaker 8 is 0.3 mm.

[0029] The first cutting tooth on the cutting edge 5 is located at one end of the insert body, and the last tooth is located at the other end of the insert body. The spacing between two adjacent cutting teeth 6 is equal, thereby ensuring that the amount of material removed by each cutting tooth 6 is consistent, and thus achieving consistent wear of each cutting tooth 6, avoiding the need to replace the entire insert due to wear of a single cutting tooth.

[0030] Furthermore, the number of cutting teeth 6 on the cutting edge 5 is 3 to 7. The number of cutting teeth can be adjusted according to the length dimension of the crankshaft being machined. When the axial distance of the outer circle dimension being machined is short, 3 teeth can be selected, and when the axial dimension is long, the number of teeth can be appropriately increased.

[0031] During machining, the crankshaft workpiece rotates axially on the lathe, and the multi-bladed cutting tool is clamped on the tool holder. The crankshaft is cut by the cutting tool moving radially on the workpiece. Each movement does not exceed the width of the cutting tooth 6, so continuous external turning can be performed. During cutting, the cutting tooth 6 squeezes the workpiece to form chips. The chips are guided into the chip removal grooves 7 on the upper and lower mounting surfaces through the arc-shaped chip grooves 9. At this time, the chips will come into contact with the chip breaking platform 8 in the chip removal groove 7. The chip breaking platform 8 creates resistance to the movement of the chips, causing the chips to break.

[0032] Obviously, the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multi-blade lathe blade, characterized in that, The device includes a blade body, the blade body having a rectangular outline, comprising two parallel upper and lower mounting surfaces and a side mounting surface connecting the two upper and lower mounting surfaces; the upper and lower mounting surfaces are provided with screw mounting and positioning holes penetrating the blade body; the side mounting surface includes a first side mounting surface perpendicular to the short side of the upper and lower mounting surfaces and a second side mounting surface perpendicular to the long side of the upper and lower mounting surfaces; the first side mounting surface mates with a blade mounting seat, and the connection between the second side mounting surface and the upper and lower mounting surfaces forms a cutting edge, the cutting edge being provided with multiple protruding cutting teeth; the upper and lower mounting surfaces are provided with chip removal grooves at the cutting teeth, and chip breaker platforms are provided within the chip removal grooves, the chip breaker platforms protruding outwards.

2. A multi-blade lathe blade according to claim 1, characterized in that, The chip breaking platform has an outwardly protruding shape similar to a triangle, with the three sides of the triangle curving downwards and connecting to the chip removal groove.

3. A multi-blade lathe blade according to claim 1, characterized in that, A chip-receiving groove is also provided between the chip-breaking platform and the edge of the chip-removing groove, and the chip-receiving groove connects the cutting edge and the chip-breaking platform.

4. A multi-blade lathe blade according to claim 1, characterized in that, The protrusion height of the chip breaking stage is 0.15~0.3mm.

5. A multi-blade lathe blade according to claim 1, characterized in that, The number of cutting teeth on the cutting edge is 3 to 7.

6. A multi-blade lathe blade according to claim 1, characterized in that, The distance between two adjacent cutting teeth is equal.

7. A multi-blade lathe blade according to claim 1, characterized in that, The first cutting tooth on the cutting edge is located at one end of the blade body, and the last tooth is located at the other end of the blade body.

8. A multi-blade lathe blade according to claim 1, characterized in that, The outer surface of the blade body is coated with a wear-resistant coating.

9. A multi-blade lathe blade according to claim 1, characterized in that, The blade body is made of cemented carbide.

10. A multi-blade lathe blade according to claim 1, characterized in that, The height difference between the lowest and highest points of the chip removal groove is 0.2~0.4mm.

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