A wedge-shaped micro-groove turning tool for cutting high-temperature alloy GH4169

Abstract

The application discloses a wedge-shaped micro-groove turning tool for cutting high-temperature alloy GH4169. The turning tool comprises a main cutting edge (2), and the main cutting edge (2) is provided with a wedge-shaped micro-groove (1) in the range of the cutting edge near field; the wedge-shaped micro-groove (1) makes the corresponding part of the main cutting edge (2) present a U-shaped mouth appearance. The application can reduce the cutting temperature, thereby improving the tool durability.

Description

A wedge-shaped microgrooving turning tool for cutting high-temperature alloy GH4169 Technical Field

[0001] This invention relates to the field of machining tool technology, and in particular to a wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169. Background Technology

[0002] GH4169, a high-temperature alloy, is a material widely used in aerospace and other fields. Due to its difficult-to-machine characteristics, many scholars have studied its optimization in machining. Optimizing tool performance is a key technical issue in machining, and the tool's geometry is a crucial factor affecting cutting performance. Existing research has largely focused on designing tool structures to reduce friction at the tool-chip contact surface and between the flank face and the machined surface, while simultaneously promoting rapid chip breaking. However, these methods have not yielded ideal results in terms of tool durability. Summary of the Invention

[0003] The purpose of this invention is to provide a wedge-shaped microgroove turning tool for cutting the high-temperature alloy GH4169. This invention can reduce the cutting temperature, thereby improving tool durability.

[0004] The technical solution of the present invention is as follows: a wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, comprising a main cutting edge, wherein a wedge-shaped microgroove is provided in the near-field region of the main cutting edge; the wedge-shaped microgroove causes the corresponding part of the main cutting edge to present a "U" shaped opening.

[0005] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, when viewed from below along the normal of the rake face, the wedge-shaped microgroove has a wedge shape with a wedge angle λ = 9 to 11°.

[0006] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the bottom surface of the wedge-shaped microgroove is arc-shaped.

[0007] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the width W of the "U"-shaped opening formed by the wedge-shaped microgroove is 0.16~0.24mm.

[0008] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the depth H of the wedge-shaped microgroove is 0.1 to 0.2 mm.

[0009] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the length of the wedge-shaped microgroove L = 0.3~0.5mm.

[0010] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, there are three wedge-shaped microgrooves, which are distributed sequentially along the main cutting edge, making the main cutting edge wavy in the near-field range of the cutting edge.

[0011] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the gap N between two adjacent wedge-shaped microgrooves is 0.01 to 0.13 mm.

[0012] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the total width of the ripples formed by the three wedge-shaped microgrooves is P = 0.74 mm.

[0013] In the aforementioned wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, the projection of the wedge-shaped microgroove onto the cross-section of the rake face is an asymmetrical curve.

[0014] Beneficial effects

[0015] Compared with existing technologies, this invention, by setting a wedge-shaped microgroove structure on the main cutting edge near the cutting edge, reduces the temperature of the actual tool-chip contact area when cutting high-temperature alloy GH4169, thereby effectively improving tool durability. Through extensive experiments and analysis on cutting high-temperature alloy GH4169, the inventors discovered that during the cutting process, the wedge-shaped microgroove creates a "U"-shaped opening on the main cutting edge, resulting in incomplete contact between the cutting edge and the chip. This creates a gap in the tool-chip contact area, facilitating the flow of cutting fluid and thus improving heat transfer and dissipation, reducing the cutting temperature and achieving the goal of improving tool durability.

[0016] Through extensive experimental analysis of cutting high-temperature alloy GH4169, the inventors discovered that when three wedge-shaped microgrooves are designed on the rake face to form a corrugated structure, with the depth H of the wedge-shaped microgrooves being 0.1–0.2 mm, the length L being 0.3–0.5 mm, the width W being 0.16–0.24 mm, and the chip angle (wedge angle) λ being 9°–11°, the cooling effect on the cutting tool is more significant. When W = 0.16–0.2 mm, H = 0.1 mm, and L = 0.3–0.5 mm, the cutting fluid can flow smoothly and quickly through the wedge-shaped microgrooves, rapidly carrying away cutting heat. Simultaneously, the microgroove structure results in incomplete contact between the tool and chip, facilitating heat dissipation. These two factors synergistically enhance the cooling effect.

[0017] Through simulation of the original cutting tool, the inventors discovered that the cutting temperature was relatively high in the near-field region of the cutting edge. Based on this, the inventors designed corresponding wedge-shaped microgrooves in this region to achieve a cooling effect. However, in the initial stage of the experiment, the cooling effect of setting 1 to 2 wedge-shaped microgrooves was not ideal. Finally, through extensive simulation experiments and optimization, the inventors obtained 3 wedge-shaped microgrooves with corresponding structural design, which ultimately achieved excellent cooling performance.

[0018] To better demonstrate the beneficial effects of this invention, the applicant conducted the following experiments: comparative experiments were conducted on cutting high-temperature alloy GH4169 using a conventional carbide turning tool and a wedge-shaped microgroove carbide turning tool. Each set of comparative experiments was conducted under the same cutting parameters for the aforementioned turning tools. The comparative experimental schemes and results for cutting high-temperature alloy GH4169 are shown in Table 1 and Figures 6-15.

[0019] Table 1

[0020]

[0021] The table above shows that wedge-shaped microgroove carbide turning tools achieve a 4.33%–20.94% increase in temperature reduction compared to ordinary carbide turning tools. The temperature reduction is most significant in the first and eighth data sets. This demonstrates that the wedge-shaped microgroove design has a significant effect on cooling the turning tool. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of a common cemented carbide turning tool;

[0023] Figure 2 is a schematic diagram of the structure of a wedge-shaped microgroove cemented carbide turning tool;

[0024] Figure 3 is a magnified view of part M in Figure 1;

[0025] Figure 4 is a schematic diagram of the three-dimensional structure at point M in Figure 1;

[0026] Figure 5 is a schematic diagram of the structure on section AA of Figure 2;

[0027] Figure 6 shows the tool-chip contact state of the microgroove when a conventional carbide turning tool is at its highest temperature under the same cutting parameters.

[0028] Figure 7 shows the tool-chip contact state of the microgroove when the first group of test cutting tools (as shown in Table 1) are at their highest temperature under the same cutting parameters.

[0029] Figure 8 shows the tool-chip contact state of the microgroove when the second group of test cutting tools (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0030] Figure 9 shows the tool-chip contact state of the microgroove when the third group of test cutting tools (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0031] Figure 10 shows the tool-chip contact state of the microgroove when the cutting tools of the fourth group of tests (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0032] Figure 11 shows the tool-chip contact state of the microgroove when the fifth group of test cutting tools (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0033] Figure 12 shows the tool-chip contact state of the microgroove when the cutting tools of the 6th group of tests (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0034] Figure 13 shows the tool-chip contact state of the microgroove when the cutting tools of the 7th group of tests (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0035] Figure 14 shows the tool-chip contact state of the microgroove when the cutting tools of the 8th group of tests (as shown in Table 1) are at the highest temperature under the same cutting parameters.

[0036] Figure 15 shows the tool-chip contact state of the microgroove when the cutting tools of the 9th group of tests (as shown in Table 1) are at their highest temperature under the same cutting parameters. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0038] Example 1. A wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, as shown in Figures 1-15, includes a main cutting edge 2, and a wedge-shaped microgroove 1 is provided in the near-field range of the main cutting edge 2; the wedge-shaped microgroove 1 makes the corresponding part of the main cutting edge 2 present a notch shape.

[0039] Looking down along the normal of the rake face 3, the wedge-shaped microgroove 1 has a wedge shape with a wedge angle λ = 9 to 11°.

[0040] The bottom surface of the aforementioned wedge-shaped microgroove 1 is arc-shaped.

[0041] The notch width W formed by the aforementioned wedge-shaped microgroove 1 is 0.16 to 0.24 mm.

[0042] The depth H of the aforementioned wedge-shaped microgroove 1 is 0.1 to 0.2 mm.

[0043] The length L of the aforementioned wedge-shaped microgroove 1 is 0.3 to 0.5 mm.

[0044] The aforementioned wedge-shaped microgrooves 1 include 3, which are distributed sequentially along the main cutting edge 2, so that the main cutting edge 2 is wavy in the near-field range of the cutting edge.

[0045] The gap N between the two adjacent wedge-shaped microgrooves 1 mentioned above is 0.01 to 0.13 mm.

[0046] The total width of the corrugations formed by the three wedge-shaped microgrooves is P = 0.74 mm.

[0047] The projection of the aforementioned wedge-shaped microgroove 1 onto the cross section of the rake face 3 is an asymmetrical curve.

Claims

1. A wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169, characterized in that, Includes a main cutting edge (2), and the main cutting edge (2) has a wedge-shaped microgroove (1) in the near range of the cutting edge; the wedge-shaped microgroove (1) makes the corresponding part of the main cutting edge (2) present a "U" shaped mouth; looking down along the normal of the rake face (3), the wedge-shaped microgroove (1) has a wedge shape, and the wedge angle λ = 9~11°; the width of the "U" shaped mouth formed by the wedge-shaped microgroove (1) is W = 0.16~0.24mm; the depth of the wedge-shaped microgroove (1) is H = 0.1~0.2mm; the length of the wedge-shaped microgroove (1) is L = 0.3~0.5mm.

2. The wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169 according to claim 1, characterized in that, The bottom surface of the wedge-shaped microgroove (1) is arc-shaped.

3. The wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169 according to claim 1, characterized in that, The wedge-shaped microgrooves (1) consist of three, which are distributed sequentially along the main cutting edge (2) to make the main cutting edge (2) wavy in the near range of the cutting edge.

4. The wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169 according to claim 3, characterized in that, The gap between two adjacent wedge-shaped microgrooves (1) is N = 0.01~0.13mm.

5. The wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169 according to claim 3, characterized in that, The total width of the corrugations formed by the three wedge-shaped microgrooves (1) is P=0.74mm.

6. The wedge-shaped microgroove turning tool for cutting high-temperature alloy GH4169 according to claim 1, characterized in that, The projection of the wedge-shaped microgroove (1) onto the cross section of the rake face (3) is an asymmetrical curve.

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