Milling fast feed blade

Abstract

A blade body is of a hexagonal prism structure and is provided with an upper end face, a lower end face, two sets of side positioning faces, two sets of rear tool faces and two sets of auxiliary faces, the side positioning faces, the rear tool faces and the auxiliary faces are oppositely arranged in pairs, a main cutting edge is formed at the intersection position of the upper end face and each rear tool face, and each main cutting edge is connected with a fillet tool nose. A chip groove is formed in the upper end face. The cutter is sharp in cutting edge, light and fast in cutting, small in depth of penetration, large in feed amount, thin in cuttings, high in cutting efficiency, capable of rapidly guiding and breaking the cuttings, long in service life, convenient and fast to replace and particularly suitable for milling materials difficult to machine, and the production of cutting heat is reduced due to the high feed amount. The milling cutter can well replace a traditional integral alloy milling cutter to be used for fast and efficient bottom edge rough machining production.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a milling fast-feed blade. Background Art

[0002] In alloy milling cutters with a tool diameter of 8-16mm and used for cutting difficult-to-machine materials, the blade cutting depth and feed rate during processing are generally relatively small, the cutting efficiency is low, and it is easy to vibrate or even break the tool, resulting in high production costs. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides a milling fast-feed blade with a sharp cutting edge, light cutting, small cutting depth, large feed rate, thinner chips, and fast chip guiding and chip breaking. Compared with traditional alloy milling cutters, its cutting efficiency can be increased by 3-5 times, and the cost can be reduced by more than 70%. In addition, high feed reduces the generation of cutting heat, and the tool life is long. At the same time, it has the characteristics of easy replacement. It is particularly suitable for milling of difficult-to-process materials, and can better replace traditional integral alloy milling cutters for fast and efficient bottom blade rough processing production.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is as follows:

[0005] A milling fast-feed blade, wherein the main body of the milling fast-feed blade is a hexagonal prism structure and is formed with an upper end face, a lower end face, and six side end faces, two opposite end faces of the six side end faces are side positioning faces, a flank face and an auxiliary face are respectively formed between the two ends of the two side positioning faces, the two flank faces and the auxiliary face are arranged opposite to each other and are respectively connected to one of the side positioning faces, and the two connected end faces are connected by arc surfaces;

[0006] The main body of the milling fast-feed blade is provided with a mounting hole slot penetrating the upper end surface and the lower end surface;

[0007] A main cutting edge is formed at the intersection of the upper end surface and each of the flank surfaces, each of the main cutting edges is connected to a rounded tip, each of the rounded tips is formed by the intersection of the upper end surface and one of the arc surfaces, and its two ends are respectively connected to one of the side positioning surfaces and the flank surface;

[0008] A chip groove is formed on the upper end surface between the mounting hole groove and each of the main cutting edge and the rounded tip, each of the chip grooves includes a first rake face, a second rake face, a chip flow face, a chip groove bottom, and a chip rewinding face, the two chip grooves are smoothly connected by two transition surfaces, and each of the transition surfaces is smoothly connected to one of the auxiliary surfaces.

[0009] As a further elaboration of the above technical solution:

[0010] In the above technical solution, each of the first rake face and the second rake face is a bevel, and forms a first rake angle and a second rake angle with the horizontal plane respectively, and each of the rake face and the main cutting edge forms a clearance angle and a main deflection angle with the machining surface; each of the first rake angles is between 4.2° and 4.6°, each of the second rake angles is between 4.1° and 4.4°, each of the clearance angles is between 12° and 18°, and each of the main deflection angles is between 15° and 22°.

[0011] In the above technical solution, the width L1 of each first front cutting edge is less than 0.1 mm, the height difference L3 between it and each anti-chip surface is between 0.1 mm and 0.2 mm, the height difference L2 between the bottom of each chip groove and the anti-chip surface is between 0.2 mm and 0.3 mm, and the angle E between each anti-chip surface and the horizontal plane is between 20° and 30°.

[0012] In the above technical solution, the radius of each rounded tool tip is between 0.7 mm and 0.9 mm.

[0013] In the above technical solution, the maximum size of the cross section of the milling fast feed blade is between 8 mm and 16 mm.

[0014] In the above technical solution, the lower end surface and the upper end surface have different profiles and are non-mirror surfaces.

[0015] Compared with the prior art, the beneficial effects of the present invention are: sharp cutting edge, light cutting, small cutting depth, thinner chips, the tool is subjected to large axial force and small radial force during cutting, the tool can be pressed tightly against the workpiece surface, the tool rod has good rigidity, and can avoid or slow down the vibration of the blade in a long-term suspended state. At the same time, due to the small radial force, its influence on the axial force is almost negligible, the feed rate of the blade can be safely increased during cutting, the cutting efficiency is high, and the chips can be quickly guided and broken. The high feed reduces the generation of cutting heat, the tool life is long, and the blade has the characteristics of easy replacement. It is particularly suitable for milling of difficult-to-process materials, and can better replace traditional integral alloy milling cutters for fast and efficient bottom blade rough processing production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of this embodiment;

[0017] Figure 2 It is the front view of this embodiment;

[0018] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of FF;

[0019] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of the middle G part.

[0020] In the figure: 1. Upper end face; 2. Side positioning surface; 3. Flank face; 4. Auxiliary face; 5. Cambered surface; 6. Mounting hole groove; 7. Main cutting edge; 8. Radius tip; 9. Chip groove; 901. First rake face; 902. Second rake face; 903. Chip flow face; 904. Chip groove bottom; 905. Anti-chip surface; 100. Horizontal plane; 200. Machined surface; A. First rake angle; B. Second rake angle; C. Rake angle; D. Main deflection angle; E. Angle between anti-chip surface and horizontal plane; L1. Width of first rake face; L2. Height difference between chip groove bottom and anti-chip surface; L3. Height difference between first rake face and anti-chip surface. DETAILED DESCRIPTION

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

[0022] The embodiments described with reference to the accompanying drawings are illustrative and intended to explain the present application, and should not be construed as limiting the present application. In the description of this application, it should be understood that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "a plurality" mean two or more, unless otherwise specifically defined. In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0023] like Figure 1-3 As shown, the milling fast feed insert has a hexagonal prism structure and is formed with an upper end face 1, a lower end face and six side end faces. Two opposite end faces of the six side end faces are side positioning faces 2. A flank face 3 and an auxiliary face 4 are respectively formed between the two ends of the two side positioning faces 2. The two flank faces 3 and the auxiliary face 4 are arranged opposite to each other and are respectively connected to the one side positioning face 2. The two connected end faces are connected by arc surfaces 5.

[0024] The main body of the milling fast feed blade is provided with a mounting hole slot 6 penetrating the upper end surface and the lower end surface;

[0025] A main cutting edge 7 is formed at the intersection of the upper end face 1 and each flank face 3. Each main cutting edge 7 is connected to a rounded tip 8. Each rounded tip 8 is formed by the intersection of the upper end face 1 and a curved surface 5, and its two ends are respectively connected to a side positioning surface 2 and the flank face 3;

[0026] A chip groove 9 is formed on the upper end surface 1 between the mounting hole groove 6 and each main cutting edge 7 and the rounded tip 8. Each chip groove 9 includes a first rake face 901, a second rake face 902, a chip flow surface 903, a chip groove bottom 904, and a chip rewinding surface 905. The two chip grooves 904 are smoothly connected by two transition surfaces, and each transition surface is smoothly connected to an auxiliary surface 4.

[0027] During cutting, the lower end face of the insert is the main positioning face, and only one of the adjacent side positioning faces 2 and auxiliary faces 4 participates in positioning. When the insert is indexed, the other face participates in the new positioning.

[0028] Specifically, each first rake face 901 and second rake face 902 is a bevel, and forms a first rake angle A and a second rake angle B with the horizontal plane 100, respectively. Each flank face 3 and main cutting edge 7 forms a clearance angle C and a main deflection angle D with the machining surface 200. Each first rake angle A is between 4.2° and 4.6°, each second rake angle B is between 4.1° and 4.4°, each clearance angle C is between 12° and 18°, and each main deflection angle D is between 15° and 22°. Preferably, the first rake angle A is 4.38°, the second rake angle B is 4.23°, the clearance angle C is 15°, and the main deflection angle D is 18.63°.

[0029] Specifically, the width L1 of each first rake face 901 is less than 0.1 mm, the height difference L3 between it and each anti-chip surface 905 is between 0.1 mm and 0.2 mm, the height difference L2 between each flute bottom 904 and an anti-chip surface 905 is between 0.2 mm and 0.3 mm, and the angle E between each anti-chip surface 905 and the horizontal plane 100 is between 20° and 30°. Preferably, the width L1 of the first rake face 901 is 0.098 mm, the height difference L3 between it and the anti-chip surface 905 is 0.15 mm, the height difference L2 between the flute bottom 904 and the anti-chip surface 905 is 0.20 mm, and the angle E between the anti-chip surface 905 and the horizontal plane 100 is 25°.

[0030] Specifically, the radius of each rounded tip 8 is between 0.7 mm and 0.9 mm. Preferably, the radius of the rounded tip 8 is 0.78 mm.

[0031] In the above embodiment, the maximum size of the cross section of the milling fast feed blade is between 8 mm and 16 mm; the contours of the lower end face and the upper end face are different and are non-mirror surfaces, and the mounting hole slot 6 can match a suitable screw to pass through and lock the blade on the corresponding cutter body.

[0032] During milling, cutting is performed by the main cutting edge 7. Due to the small main rake angle D, the cutting depth does not exceed 0.5mm, and the resulting chips are also thin. Simultaneously, during the cutting process, the tool is subjected to a large axial force and a small radial force. The large axial force acts as if the tool is "pressing" the tool against the workpiece surface, resulting in a relatively high toolholder rigidity. The small radial force has a negligible effect on the axial force, resulting in no blade chattering during prolonged suspension. Furthermore, due to the low radial force, the blade feed rate can be increased during cutting, resulting in high cutting speeds and rapid chip guiding and breaking. Production verification has demonstrated that the cutting depth can reach Apmax = 0.5mm and the feed per tooth Fzmax = 0.6mm. This achieves cutting efficiency 3-5 times that of conventional alloy milling cutters, while reducing costs by over 70%. Furthermore, the high feed rate reduces cutting heat generation, prolongs tool life, and allows for easy blade replacement. This makes the cutting tool particularly suitable for milling difficult-to-machine materials and can effectively replace conventional solid alloy milling cutters for fast and efficient bottom-edge roughing.

[0033] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Milling fast feed insert, characterized by: The main body of the milling fast-feed blade is in a hexagonal prism structure and is formed with an upper end face, a lower end face and six side end faces, two opposite end faces of the six side end faces are side positioning faces, a flank face and an auxiliary face are respectively formed between the two ends of the two side positioning faces, the two flank faces and the auxiliary face are arranged opposite to each other and are respectively connected to one of the side positioning faces, and the two connected end faces are connected by arc surfaces; The main body of the milling fast-feed blade is provided with a mounting hole slot penetrating the upper end surface and the lower end surface; A main cutting edge is formed at the intersection of the upper end surface and each of the flank surfaces, each of the main cutting edges is connected to a rounded tip, each of the rounded tips is formed by the intersection of the upper end surface and one of the arc surfaces, and its two ends are respectively connected to one of the side positioning surfaces and the flank surface; A chip groove is formed on the upper end surface between the mounting hole groove and each of the main cutting edge and the rounded tip, each of the chip grooves includes a first rake face, a second rake face, a chip flow face, a chip groove bottom, and a chip rewinding face, the two chip grooves are smoothly connected by two transition surfaces, and each of the transition surfaces is smoothly connected to one of the auxiliary surfaces.

2. The milling fast feed insert according to claim 1, characterized in that: Each of the first rake face and the second rake face is a bevel, and forms a first rake angle and a second rake angle with the horizontal plane respectively, and each of the rake face and the main cutting edge forms a clearance angle and a main deflection angle with the machining surface; each of the first rake angles is between 4.2° and 4.6°, each of the second rake angles is between 4.1° and 4.4°, each of the clearance angles is between 12° and 18°, and each of the main deflection angles is between 15° and 22°.

3. The milling fast feed insert according to claim 1, characterized in that: The width of each first front cutting edge is less than 0.1 mm, and the height difference between it and each anti-chip surface is between 0.1 mm and 0.2 mm. The height difference between the bottom of each chip groove and an anti-chip surface is between 0.2 mm and 0.3 mm. The angle E between each anti-chip surface and the horizontal plane is between 20° and 30°.

4. The milling fast feed insert according to claim 1, characterized in that: The radius of each rounded tip is between 0.7 mm and 0.9 mm.

5. The milling fast feed insert according to claim 1, characterized in that: The maximum dimension of the cross section of the milling fast feed insert is between 8 mm and 16 mm.

6. The milling fast feed insert according to any one of claims 1 to 5, characterized in that: The lower end surface has a different profile from the upper end surface and is a non-mirror surface.

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