A precision slotting tool

Abstract

The application provides a precise slotting blade, and belongs to the technical field of cutters. The existing slotting blade cannot make the chip narrow. The application comprises a cutting head and a clamping handle. The rear surface and the upper surface form a main cutting edge. Two side surfaces and the upper surface form side cutting edges. The two ends of the main cutting edge are connected with the side cutting edges through round corner cutting edges. The middle part of the upper surface is provided with a groove. The groove is provided with a first chip breaking boss near the front end of the main cutting edge and one side cutting edge and a second chip breaking boss near the front end of the main cutting edge and the other side cutting edge. The first chip breaking boss and the second chip breaking boss form a chip breaking groove. The width of the chip breaking groove gradually decreases from front to back. The chip breaking groove makes the chip narrow, has good chip discharge effect, and can obtain good side wall surface quality of the workpiece, and can realize stable cutting.

Description

Technical Field

[0001] This invention belongs to the field of cutting tool technology and relates to a precision grooving insert. Background Technology

[0002] In metal turning, especially for grooving, the cutting tools must not only have sharp edges but also good chip-breaking ability. This is because the curling, breaking, and smooth removal of chips are crucial aspects of workpiece machining. If the cutting tool's chip-breaking ability is weak, it will increase the cutting force, cause cutting vibration, lead to cutting blockage, and stop the machining process. In severe cases, the chips cannot be discharged normally, causing the grooving tool to break and resulting in accidents.

[0003] In the existing technology, the structure of grooving inserts often uses a simple integral chip breaker groove as the important structure of the chip breaker table. However, this structure design results in excessively wide chips, and the single chip breaker structure cannot guarantee the smoothness of chip breaking under complex machining conditions. Therefore, changing the structural design of the chip breaker table and optimizing the chip breaking capability of the insert to ensure stable machining is an important means of grooving insert machining. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a precision grooving insert that can narrow the chips.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A precision grooving insert includes a cutting head and a clamping shank extending longitudinally along the cutting head. The cutting head includes an upper surface, two side surfaces, and a flank face. The flank face intersects with the upper surface to form a main cutting edge, and the two side surfaces intersect with the upper surface to form side cutting edges. The two ends of the main cutting edge are connected to the side cutting edges via rounded cutting edges. A groove is provided in the middle of the upper surface. The main cutting edge is connected to the front end of the groove via a first inclined surface. The two side surfaces are connected to the two sides of the groove via second inclined surfaces. The groove contains a first chip-breaking boss with its front end close to the main cutting edge and one of the side cutting edges, and a second chip-breaking boss with its front end close to the main cutting edge and the other side cutting edge. A chip-breaking groove is formed between the first chip-breaking boss and the second chip-breaking boss, and the width of the chip-breaking groove gradually decreases from front to back.

[0007] The chip breaker groove narrows the chip area, resulting in excellent chip removal and good sidewall surface quality on the workpiece, enabling stable cutting. During transverse turning, the first and second chip breaker bosses effectively guide chips, ensuring timely chip removal.

[0008] In the aforementioned precision grooved cutting tool, the rear ends of the first chip breaker and the second chip breaker extend rearward and inward respectively and connect with the third chip breaker provided in the groove. The surfaces of the first chip breaker and the second chip breaker are curved surfaces. The first chip breaker and the second chip breaker are connected by a first curved surface, and the third chip breaker is connected to the first curved surface by a second curved surface.

[0009] The surfaces of the first and second chip-breaking bosses are set as curved surfaces, and the first and second chip-breaking bosses are connected by a first curved surface, and the third chip-breaking boss is connected to the first curved surface by a second curved surface, which reduces friction with the chips and extends the service life of the cutting tool.

[0010] In the aforementioned precision grooving insert, the first chip-breaking boss and the second chip-breaking boss gradually extend upward from front to back, and the first chip-breaking boss, the second chip-breaking boss, and the adjacent second inclined surface are respectively connected by a third curved surface.

[0011] During transverse turning, the first and second chip-breaking bosses, which have curved surfaces, have a good chip-guiding effect, ensuring that the chips are discharged in time. The third curved surface can also reduce the friction between the chip and the cutting tool, effectively extending the service life of the cutting tool.

[0012] In the above-mentioned precision grooving insert, the first chip-breaking boss and the second chip-breaking boss are inclined at an angle of α from front to back and upward, where α = 3°-10°.

[0013] In the aforementioned precision grooving blade, a chip-rolling platform is provided in the center of the chip-breaking groove. The chip-rolling platform has a symmetrical structure and its surface is curved. The height of the chip-rolling platform increases from front to back and then decreases.

[0014] A unique top protrusion is formed on the top of the chip folding table, which can effectively control the upward curling of chips, obtain smooth chip discharge, increase heat dissipation space, reduce the friction between chips and blades, and allow the cutting fluid to enter the cutting area more fully, thus inhibiting the formation of edge.

[0015] In the aforementioned precision grooved cutting tool, the chip-rolling table is connected to the first chip-breaking boss, the first curved surface, the second chip-breaking boss, and the first inclined surface via a fourth curved surface surrounding the chip-rolling table. The first chip-breaking boss and the second chip-breaking boss are connected to the first inclined surface via a fifth curved surface, and the fifth curved surface is connected to the fourth curved surface.

[0016] In the above-mentioned precision grooved cutting tool, the inclination angle of the first inclined surface is β, where β = 5°-20°.

[0017] In the above-mentioned precision grooved blade, the inclination angle of the second inclined surface is γ, where γ = 5°-20°.

[0018] In the above-mentioned precision grooving insert, the height of the highest point of the chip folding table is not lower than the height of the main cutting edge, and the vertical distance from the highest point of the chip folding table to the main cutting edge is h, where h = 0-0.3mm.

[0019] In the above-mentioned precision grooved insert, the horizontal distance from the highest point of the chip-rolling table to the main cutting edge is l, where l = 0.4-2 mm.

[0020] Compared with existing technologies, this precision-grooving insert has the following advantages:

[0021] The first and second chip-breaking bosses narrow the chip area, resulting in excellent chip removal and good sidewall surface quality for the workpiece, enabling stable cutting. During transverse turning, the first and second chip-breaking bosses provide excellent chip guidance, ensuring timely chip removal. The large inclination angle of the first inclined surface results in low cutting resistance, smooth cutting, and improved lifespan during light-load machining and machining of difficult-to-machine materials. The straight main cutting edge provides high edge strength, achieving good groove bottom quality. The unique top protrusion on the top of the chip-rolling table effectively controls the upward curling of chips, resulting in smooth chip removal, increased heat dissipation space, reduced friction between chips and cutting tools, and allows cutting fluid to penetrate the cutting area more fully, inhibiting the formation of edge buildup. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the precision grooved blade provided by the present invention.

[0023] Figure 2 This is a side view of the precision grooving blade provided by the present invention.

[0024] Figure 3 This is a top view of the precision grooving blade provided by the present invention.

[0025] Figure 4 This invention provides Figure 3 Sectional view at point AA.

[0026] Figure 5 This invention provides Figure 3 Sectional view at point BB.

[0027] Figure 6 This is a partially enlarged schematic diagram of the precision grooving blade provided by the present invention.

[0028] In the figure, 1. Cutting head; 2. Clamping shank; 3. Side surface; 4. Rake face; 5. Main cutting edge; 6. Side cutting edge; 7. Rounded corner cutting edge; 8. First inclined surface; 9. Second inclined surface; 10. First chip breaker boss; 11. Second chip breaker boss; 12. Chip breaker groove; 13. Third chip breaker boss; 14. First curved surface; 15. Second curved surface; 16. Third curved surface; 17. Chip folding platform; 18. Fourth curved surface; 19. Fifth curved surface. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figure 1 The precision grooving insert shown includes a cutting head 1 and a clamping shank 2 extending longitudinally along the cutting head 1. There is also a cutting head 1 at the other end of the clamping shank 2, and the two cutting heads 1 are symmetrically arranged.

[0031] Among them, such as Figure 6 As shown, the cutting head 1 includes an upper surface, two side surfaces 3 and a flank face 4. The flank face 4 intersects with the upper surface to form the main cutting edge 5. The two side surfaces 3 intersect with the upper surface to form the side cutting edges 6. The two ends of the main cutting edge 5 are connected to the side cutting edges 6 by rounded cutting edges 7. A groove is provided in the middle of the upper surface. The main cutting edge 5 is connected to the front end of the groove by a first inclined surface 8. The two side surfaces 3 are connected to the two sides of the groove by a second inclined surface 9.

[0032] like Figure 4 As shown, the first inclined surface 8 slopes downwards from front to back (from the cutting head 1 towards the clamping shank 2), with an inclination angle of β, where β = 5°-20°. Figure 5 As shown, the second inclined surface 9 is inclined downward from the outside to the inside (from the side cutting edge 6 towards the groove), and its inclination angle is γ, where γ = 5°-20°.

[0033] like Figure 1 and Figure 3 As shown, the groove is provided with a first chip-breaking boss 10 with its front end close to the main cutting edge 5 and one of the side cutting edges 6, and a second chip-breaking boss 11 with its front end close to the main cutting edge 5 and the other side cutting edge 6. The first chip-breaking boss 10 and the second chip-breaking boss 11 are symmetrically arranged, and a chip-breaking groove 12 is formed between the first chip-breaking boss 10 and the second chip-breaking boss 11. The width of the chip-breaking groove 12 gradually decreases from front to back.

[0034] The chip breaker groove 12 narrows the chip area, providing excellent chip removal and ensuring good sidewall surface quality on the workpiece, enabling stable cutting. During transverse turning, the first chip breaker boss 10 and the second chip breaker boss 11 effectively guide chips, ensuring timely chip removal.

[0035] like Figure 1 , Figure 3 and Figure 6 As shown, the rear ends of the first chip-breaking boss 10 and the second chip-breaking boss 11 extend backward and inward respectively and connect with the third chip-breaking boss 13 provided in the groove. The surfaces of the first chip-breaking boss 10 and the second chip-breaking boss 11 are curved surfaces. The first chip-breaking boss 10 and the second chip-breaking boss 11 are connected by a first curved surface 14, and the third chip-breaking boss 13 is connected to the first curved surface 14 by a second curved surface 15.

[0036] The surfaces of the first chip-breaking boss 10 and the second chip-breaking boss 11 are set as curved surfaces. The first chip-breaking boss 10 and the second chip-breaking boss 11 are connected by a first curved surface 14, and the third chip-breaking boss 13 is connected to the first curved surface 14 by a second curved surface 15. This reduces friction with the chips and extends the service life of the blade.

[0037] like Figure 2 As shown, the first chip-breaking boss 10 and the second chip-breaking boss 11 extend gradually upwards from front to back. The first chip-breaking boss 10, the second chip-breaking boss 11, and the adjacent second inclined surface 9 are connected by a third curved surface 16. During transverse turning, the curved surfaces of the first chip-breaking boss 10 and the second chip-breaking boss 11 provide good chip guiding, ensuring timely chip removal. The third curved surface 16 also reduces friction with the chips, effectively extending the tool life.

[0038] The first chip-breaking boss 10 and the second chip-breaking boss 11 are inclined at an angle of α from front to back and upward, where α = 3°-10°.

[0039] like Figure 6 As shown, a chip-rolling platform 17 is centrally located within the chip breaker groove 12. The chip-rolling platform 17 has a symmetrical structure and a curved surface. The height of the chip-rolling platform 17 increases from front to back and then decreases. A unique top protrusion is formed at the top of the chip-rolling platform 17, which can effectively control the upward curling of chips, achieve smooth chip discharge, increase heat dissipation space, reduce friction between chips and cutting tools, and allow cutting fluid to enter the cutting area more fully, thus inhibiting the formation of edge buildup.

[0040] like Figure 6As shown, the chip shredder 17 is connected to the first chip breaking boss 10, the first curved surface 14, the second chip breaking boss 11 and the first inclined surface 8 via the fourth curved surface 18 surrounding the chip shredder 17. The first chip breaking boss 10 and the second chip breaking boss 11 are connected to the first inclined surface 8 via the fifth curved surface 19. The fifth curved surface 19 is connected to the fourth curved surface 18.

[0041] like Figure 4 As shown, the height of the highest point of the chip folding table 17 is not lower than the height of the main cutting edge 5, the vertical distance from the highest point of the chip folding table 17 to the main cutting edge 5 is h, h = 0-0.3mm; the horizontal distance from the highest point of the chip folding table 17 to the main cutting edge 5 is l, l = 0.4-2mm.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A precision grooving insert, comprising a cutting head (1) and a clamping shank (2) extending longitudinally along the cutting head (1), wherein the cutting head (1) comprises an upper surface, two side surfaces (3) and a flank face (4), the flank face (4) intersecting the upper surface to form a main cutting edge (5), the two side surfaces (3) intersecting the upper surface to form side cutting edges (6), the two ends of the main cutting edge (5) being connected to the side cutting edges (6) respectively via rounded cutting edges (7), a groove being provided in the middle of the upper surface, the main cutting edge (5) being connected to the front end of the groove via a first inclined surface (8), and the two side surfaces (3) being connected to the two sides of the groove respectively via a second inclined surface (9), characterized in that, The groove is provided with a first chip-breaking boss (10) with its front end close to the main cutting edge (5) and one of the side cutting edges (6), and a second chip-breaking boss (11) with its front end close to the main cutting edge (5) and the other side cutting edge (6). A chip-breaking groove (12) is formed between the first chip-breaking boss (10) and the second chip-breaking boss (11). The width of the chip-breaking groove (12) gradually decreases from front to back. The first chip-breaking boss (10) and the second chip-breaking boss (11) gradually extend upward from front to back and the upward tilt angle α is 3°-10°. A symmetrical, curved chip-rolling platform (17) is provided in the center of the chip-breaking groove (12). The height of the chip-rolling platform (17) first increases and then decreases from front to back. The height of the highest point of the chip-rolling platform (17) is not lower than the height of the main cutting edge (5). The vertical distance h between the highest point of the chip-rolling platform (17) and the main cutting edge (5) is 0-0.3mm, and the horizontal distance l is 0.4-2mm.

2. The precision grooving blade according to claim 1, characterized in that, The rear ends of the first chip-breaking boss (10) and the second chip-breaking boss (11) extend backward and inward respectively and connect with the third chip-breaking boss (13) provided in the groove. The surfaces of the first chip-breaking boss (10) and the second chip-breaking boss (11) are curved surfaces. The first chip-breaking boss (10) and the second chip-breaking boss (11) are connected by a first curved surface (14). The third chip-breaking boss (13) is connected by a second curved surface (15).

3. The precision grooving blade according to claim 1, characterized in that, The first chip-breaking boss (10) and the second chip-breaking boss (11) extend gradually upward from front to back. The first chip-breaking boss (10), the second chip-breaking boss (11) and the second inclined surface (9) adjacent to them are connected by a third curved surface (16).

4. The precision grooving blade according to claim 1, characterized in that, The chip-rolling platform (17) is connected to the first chip-breaking boss (10), the first curved surface (14), the second chip-breaking boss (11) and the first inclined surface (8) respectively through the fourth curved surface (18) surrounding the chip-rolling platform (17). The first chip-breaking boss (10) and the second chip-breaking boss (11) are connected to the first inclined surface (8) respectively through the fifth curved surface (19). The fifth curved surface (19) is connected to the fourth curved surface (18).

5. The precision grooving blade according to claim 1, characterized in that, The tilt angle of the first inclined surface (8) is β, where β = 5°-20°.

6. The precision grooving blade according to claim 1, characterized in that, The tilt angle of the second inclined surface (9) is γ, where γ = 5°-20°.

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