Inwardly recessed compound chamfering tool

Abstract

The utility model discloses a kind of concave composite chamfering cutter, belong to machining tool design technical field, the composite chamfering cutter includes two center symmetrical cutter teeth, cutter tooth is composed of back rake face, oblique front and cylindrical arc surface, wherein: the included angle range of back rake face and vertical face is 35 ° to 50 °, the included angle range of oblique front and vertical face is 8 ° to 15 °, cylindrical arc surface is the extension of cylindrical cutter body, the top end of cutter tooth is also provided with tooth end face, the included angle range of tooth end face and horizontal plane is 3 ° to 8 °. Compared with prior art, the composite chamfering cutter carries out mirror image processing to the two blades of tool, and designs specific cutter tooth angle, and the oblique front of specific angle can effectively increase the strength of tool, facilitate chip removal, and the back rake face of specific degree can reduce the wear of cutting edge while reducing vibration;The stability and service life of tool are improved, and the overall tool can effectively reduce the vibration interference in the machining process during the machining process, to ensure the stability and consistency of machining quality.

Description

Technical Field

[0001] This utility model belongs to the field of machining tool design technology, and in particular relates to a concave composite chamfering tool. Background Technology

[0002] In the field of military equipment manufacturing, with the rapid iterative development of aviation technology, the structural complexity of key components such as engines has significantly increased. Parts, especially the casing of a certain new type of aero-engine, exhibit advanced structural features such as multi-dimensional curved surfaces and thin-walled irregular shapes. This structural evolution has directly led to a fundamental change in machining conditions, and traditional machining tools have obvious functional deficiencies when dealing with high-strength, high-temperature alloy materials, complex curved surface features, and stringent precision requirements.

[0003] Specifically, conventional chamfering tools, limited by their single-edge structure and fixed geometric parameters, generally suffer from process defects such as chip removal difficulties, tool chatter, and work hardening when performing complex chamfering on new housing parts. Although on-site improvements such as scraping process optimization and cutting path compensation have been attempted, the actual application results have been poor. How to solve these technical problems has long been a challenge for technicians in this field. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a concave composite chamfering tool, which solves the problems through the following technical means:

[0005] A concave composite chamfering cutter includes two centrally symmetrical cutting teeth, each tooth consisting of a backward-inclined surface, a front inclined surface, and a cylindrical arc surface. The first angle between the backward-inclined surface and the vertical surface ranges from 35° to 50°; the second angle between the front inclined surface and the vertical surface ranges from 8° to 15°; and the cylindrical arc surface is an extension of the cylindrical cutter body.

[0006] Preferably, the top of the cutting tooth is further provided with a tooth end face, and the tooth end face is inclined downward at a third angle with the horizontal plane ranging from 3° to 8°.

[0007] Preferably, the first angle between the backward-sloping surface and the vertical surface ranges from 40° to 48°.

[0008] Preferably, the second included angle between the oblique front face and the vertical face ranges from 9° to 12°.

[0009] Preferably, the cutting edge length of the blade is 3mm to 6mm.

[0010] Preferably, the middle part of the backward-tilting surface is also provided with a cooling hole that penetrates the interior of the cutting tool.

[0011] The concave composite chamfering tool of this utility model has the following beneficial effects:

[0012] This composite chamfering tool features mirrored edges and a specific tooth angle, creating a beveled front face. This design effectively enhances the overall strength of the tool, maintaining stability even under high cutting forces. Furthermore, the beveled front face facilitates smooth chip removal, reducing chip accumulation in the machining area and preventing chip entanglement that could negatively impact machining quality. The beveled front face also reduces friction between the tool and workpiece, minimizing cutting heat generation, while simultaneously increasing tool strength, facilitating chip removal, reducing cutting edge wear, and minimizing vibration. Extensive and repeated physical cutting experiments have fully validated the superiority of this tool design. Its cutting efficiency is significantly improved compared to traditional tools, and the tool effectively reduces vibration interference during machining, ensuring stable and consistent machining quality. This provides strong support for the efficient and precise machining of casing cavities. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the backward tilting surface structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the oblique front structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the tooth end face structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the cooling hole structure of this utility model.

[0019] Among them, 1. cutting teeth; 2. backward inclined surface; 3. oblique front surface; 4. cylindrical arc surface; 5. tooth end face; 6. cooling hole. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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 this utility model. 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1 to 5 As shown, the concave composite chamfering tool includes two centrally symmetrical cutting teeth 1. Each cutting tooth 1 consists of a backward-inclined surface 2, a beveled front surface 3, and a cylindrical arc surface 4. In the figure, the first angle α between the backward-inclined surface 2 and the vertical plane ranges from 35° to 50°; the second angle β between the beveled front surface 3 and the vertical plane ranges from 8° to 15°; and the cylindrical arc surface 4 is an extension of the cylindrical tool body. Furthermore, preferably, the top of each cutting tooth 1 is also provided with a tooth end face 5. The tooth end face 5 is inclined downwards at a third angle γ with the horizontal plane, ranging from 3° to 8°. The tooth end face reduces cutting resistance and avoids problems such as chip entanglement affecting machining quality.

[0023] In practical applications, the first angle α between the backward-tilted surface 2 and the vertical surface ranges from 40° to 48°, the second angle β between the oblique front surface 3 and the vertical surface ranges from 9° to 12°, and the cutting edge length of the tooth 1 ranges from 3mm to 6mm.

[0024] It should be noted that this tool is a two-flute 180° mirror-image tooth. Compared with a standard chamfering tool, the two edges of the tool have been mirrored, and the fusion angle, rake angle, clearance angle, and cutting length have been adjusted. After mirroring the cutting edge positions of the first and second teeth, an angle bias has been designed, and the rake angle and rake face of the tool have been made into a beveled rake angle, which can effectively increase the tool strength; facilitate chip removal; increase the clearance angle, use a concave composite chamfering tool to increase strength; reduce cutting edge wear and reduce vibration; and improve the stability and service life of the tool.

[0025] In practical applications, a cooling hole 6 penetrating the inside of the tool is also provided in the middle of the backward-curved surface 2. The cooling hole is connected to the coolant through the tube at the end, which can significantly reduce the temperature during the machining process and solve the problem of temperature rise caused by the difficulty of the coolant reaching the working area when the drilling depth is large.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A concave composite chamfering tool, characterized in that, It includes two centrally symmetrical cutting teeth (1), each cutting tooth (1) consisting of a backward-inclined surface (2), a slanted front surface (3), and a cylindrical arc surface (4), wherein: The first angle (α) between the backward-inclined surface (2) and the vertical surface ranges from 35° to 50°; The second angle (β) between the oblique front face (3) and the vertical plane ranges from 8° to 15°; The cylindrical arc surface (4) is an extension surface of the cylindrical blade.

2. The concave composite chamfering tool according to claim 1, characterized in that, The top of the blade (1) is also provided with a tooth end face (5), and the tooth end face (5) is inclined downward at a third angle (γ) with the horizontal plane ranging from 3° to 8°.

3. The concave composite chamfering tool according to claim 1, characterized in that, The first angle (α) between the backward-inclined surface (2) and the vertical surface ranges from 40° to 48°.

4. The concave composite chamfering tool according to claim 1, characterized in that, The second angle (β) between the oblique front face (3) and the vertical face ranges from 9° to 12°.

5. The concave composite chamfering tool according to claim 1, characterized in that, The blade length of the blade (1) is 3mm to 6mm.

6. The concave composite chamfering tool according to claim 1, characterized in that, The back-tilting surface (2) is also provided with a cooling hole (6) that penetrates the inside of the cutting tool.

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