Multi-fillet double-sided four-edge square shoulder milling cutter blade

Abstract

The utility model discloses a multi-fillet double-sided four-edge square shoulder milling blade, which is characterized by comprising a blade main body with a cuboid structure, two symmetrically arranged bulges are formed on each of the upper plane and the lower plane of the blade main body, and a side edge, a bottom edge and a fillet are formed at the joint of each bulge and one side surface, the joint of each bulge and a rear cutter surface as well as the joint of each bulge and an arc surface; a chip breaking area is formed between each protrusion and the upper plane or the lower plane. The four cutting edges which can be used for cutting are formed on the cutter, the first front cutter face, the second front cutter face and the curled face are formed on the side of each cutting edge, the requirements for chip breaking and chip curling in different cutting depths in the cutting process can be met, the perpendicularity of the cutter machining face is high, the machining precision is high, and the service life of the cutter is prolonged. The milling cutter is simple in structure, capable of guaranteeing that products of different batches keep stable and consistent machining quality, suitable for square shoulder and plane milling of steel parts, stainless steel, high-temperature alloy, titanium alloy and other materials, wide in application, high in blade utilization rate, long in service life and high in overall economic value.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a multi-radius double-sided four-edged square shoulder milling insert. Background Art

[0002] Square shoulder machining is a very important process in milling. Market demands for the mechanical properties of the tool tip radius on the milling inserts used for square shoulder machining, the verticality of the square shoulder machining, and the economical use of milling inserts are all increasing. Traditional square shoulder inserts generally have only two interchangeable corners, and because most inserts are press-formed, the installation accuracy is not high, so the verticality of the machined surface is often difficult to guarantee. During machining, the machine operator must rely on their personal experience to improve machining accuracy, and the accuracy of different batches of products often varies. With the rapid development of fully automated machining and the rising cost of labor, the market urgently needs economical square shoulder milling inserts with high surface vertical accuracy, long service life, and compatibility with the machining of multiple materials. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides a multi-radius double-sided four-edged square shoulder milling insert. Four cutting edges are formed on the insert, and a first rake face, a second rake face and a curling surface are formed on the side of each cutting edge, which can meet the chip breaking and curling needs at different cutting depths during cutting. The tool processing surface has high verticality and high processing accuracy, which can ensure that different batches of products maintain stable and consistent processing quality. It is suitable for square shoulder and plane milling processing of materials such as steel, stainless steel, high-temperature alloys and titanium alloys. It has a wide range of uses, high blade utilization rate, long service life and high overall economic value.

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

[0005] Double-sided four-edged shoulder milling insert with multiple radius, including:

[0006] A blade body having a rectangular parallelepiped structure, wherein the blade body is formed with an upper plane and a lower plane, two side surfaces and two flank surfaces that are symmetrically arranged facing each other, and a circular arc surface is formed at the intersection of each side surface and the flank surface;

[0007] The contour edges of the upper plane and the lower plane are each formed with two symmetrically arranged protrusions, the two protrusions on the upper plane / lower plane respectively intersect with the two adjacent side surfaces and the back cutting surface and extend obliquely toward the upper / lower side of the inner side of the blade body, the upper end surface / lower end surface of each protrusion is an inclined surface, and the intersection of each protrusion with one of the side surfaces, the back cutting surface and the arc surface is formed with a side edge, a bottom edge and a fillet, and a chip breaking area is formed between each protrusion and the upper plane or the lower plane;

[0008] A mounting hole slot penetrating the blade body is provided at the center of the blade body.

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

[0010] In the above technical solution, each of the chip breaking areas is formed with a first rake face, a second rake face and a curled surface connected in sequence, each of the first rake faces is arranged at the upper end or lower end of the protrusion, and each of the curled surfaces is smoothly connected to the upper plane or the lower plane.

[0011] In the above technical solution, each of the first rake faces is a bevel, its width is between 0.3mm and 0.4mm, its height is between 0.15mm and 0.22mm, and it forms a first rake angle with the horizontal plane, and each of the first rake angles is between 22° and 29°.

[0012] In the above technical solution, each of the second rake faces is a curved surface, and forms a second rake angle with the horizontal plane, and each of the second rake angles is between 35° and 45°.

[0013] In the above technical solution, the angle between each of the curling surfaces and the horizontal plane is between 65° and 75°.

[0014] In the above technical solution, the height of each protrusion is between 0.25 mm and 0.4 mm.

[0015] In the above technical solution, the included angle between each adjacent side surface and the back cutting surface is 90°, and the radius of each rounded corner is between 0.4 mm and 2.4 mm.

[0016] In the above technical solution, each of the flank surfaces is perpendicular to the upper plane and the lower plane.

[0017] In the above technical solution, a finishing plane is formed at the end of each arc surface close to the protrusion, and each finishing plane intersects with a bottom edge to form a finishing edge.

[0018] Compared with the prior art, the beneficial effects of the present invention are: by symmetrically arranging two protrusions on the upper plane and the lower plane, four cutting edges can be formed on the blade, and side edges, bottom edges and fillets are formed at each cutting edge. Each cutting edge can cooperate in cutting, and the effective utilization rate of the blade is high; by forming a chip breaking area beside each cutting edge, and forming a first front cutting edge, a second front cutting edge and a curling surface in each chip breaking area, the chip breaking and curling needs at different cutting depths during cutting can be met. The verticality of the tool processing surface is high, and the processing accuracy is high, which can ensure that different batches of products maintain stable and consistent processing quality. It is suitable for square shoulder and plane milling processing of materials such as steel, stainless steel, high-temperature alloys and titanium alloys. It has a wide range of uses, a long service life of the blade, and a high overall economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle part A;

[0021] Figure 3 yes Figure 1 Schematic diagram of the top view structure;

[0022] Figure 4 yes Figure 1 Structural diagram from another perspective;

[0023] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of EE;

[0024] Figure 6 yes Figure 5 A magnified schematic diagram of the structure of the middle part B;

[0025] Figure 7 It is a structural schematic diagram of another embodiment of the utility model.

[0026] In the figure: #111, blade body; #222, horizontal plane; 1, upper plane; 2, lower plane; 3, side; 5, back cutting edge; 6, arc surface; 7, protrusion; 8, side edge; 9, bottom edge; 10, fillet; 11, chip breaking area; 12, first rake face; 13, second rake face; 14, curled surface; 15, mounting hole; 16, finishing plane; 18, finishing edge; L1, width of the first rake face; L2, height of the first rake face; L3, height of the protrusion; A1, first rake angle; A2, second rake angle; A3, angle between the curled surface and the horizontal plane. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] 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.

[0029] like Figure 1-4 As shown, the multi-radius double-sided four-edge shoulder milling insert includes:

[0030] The blade body #111 is a rectangular parallelepiped, and is formed with an upper plane 1 and a lower plane 2, two side surfaces 3, and two flank surfaces 5 facing and symmetrically arranged. A circular arc surface 6 is formed at the intersection of each side surface 3 and flank surface 5.

[0031] Two symmetrically arranged protrusions 7 are formed on the contour edges of the upper plane 1 and the lower plane 2. The two protrusions 7 on the upper plane 1 / lower plane 2 intersect with two adjacent side surfaces 3 and flank surfaces 5 respectively and extend obliquely toward the upper / lower side of the inner side of the insert body #111. The upper end surface / lower end surface of each protrusion 7 is a bevel. A side edge 8, a bottom edge 9 and a fillet 10 are formed at the intersection of each protrusion 7 with a side surface 3, a flank surface 5 and an arc surface 6. A chip breaking area 11 is formed between each protrusion 7 and the upper plane 1 or the lower plane 2.

[0032] A mounting hole 15 is provided in the center of the blade body #111 and passes through the body.

[0033] like Figure 2 As shown, each chip breaking area 11 is formed with a first rake face 12, a second rake face 13 and a curled surface 14 connected in sequence, each first rake face 12 is arranged at the upper end or the lower end of a protrusion 7, and each curled surface 14 is smoothly connected to the upper plane 1 or the lower plane 2.

[0034] like Figure 5-6 As shown, each first rake face 12 is a bevel, its width L1 is between 0.3mm and 0.4mm, its height L2 is between 0.15mm and 0.22mm, and a first rake angle A1 is formed between it and the horizontal plane, and each first rake angle A1 is between 22° and 29°; each second rake face 13 is a curved surface, and a second rake angle A2 is formed between it and the horizontal plane, and each second rake angle A2 is between 35° and 45°; the angle A3 between each curled surface 14 and the horizontal plane #222 is between 65° and 75°; the height L3 of each protrusion 7 is between 0.25mm and 0.4mm.

[0035] In this embodiment, the width L1 of the first rake face 12 is 0.35 mm, the height L2 is 0.18 mm, the first rake angle A1 is 26.6°, the second rake angle A2 is 40.4°, and the angle A3 between the curled surface 14 and the horizontal plane #222 is 71.08°.

[0036] Specifically, each adjacent side surface 3 forms a 90° angle with the flank surface 5, and the radius of each fillet 10 ranges from 0.4 mm to 2.4 mm. In practice, insert body #111 is formed with standard fillets 10, with radii of 0.4 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.6 mm, 2.1 mm, and 0.4 mm, respectively, which can be adjusted based on actual needs.

[0037] Specifically, each flank surface 5 is perpendicular to the upper plane 1 and the lower plane 2 .

[0038] During cutting, the side cutting edge 8 and bottom cutting edge 9 at each blade edge can either cooperate with the corner radius 10 to cut the workpiece individually, or the side cutting edge 8, bottom cutting edge 9, and corner radius 10 can cooperate together to cut the workpiece. Each cutting edge squeezes the workpiece, causing the chips to flow smoothly over the first rake face 12 and the second rake face 13, where they undergo significant deformation. When the cutting depth is small, chip breaking can be completed here. When the cutting depth is medium or large, as the feed rate increases, the chips will continue to slide along the curling surface 14, with some falling off under their own weight and some flowing to the upper plane 1 or lower plane 2, where they are curled and broken after impact. The insert in this embodiment has been verified to be able to continue chip breaking normally at a cutting depth of up to 9mm, meeting customer requirements for various corner radiuses in square shoulder and plane milling. The tool's machining surface also features high verticality, making it suitable for square shoulder machining of materials such as steel, stainless steel, high-temperature alloys, and titanium alloys. It has a wide range of applications, and all four cutting edges on the upper and lower end surfaces of the insert can be used for cutting, resulting in high insert utilization, a long service life, and high overall economic value. At the same time, the periphery of the blade in the utility model is ground, which can effectively ensure the accuracy of each dimension, thereby ensuring the installation accuracy of the blade, further improving the processing accuracy, and ensuring that different batches of products maintain stable and consistent processing quality.

[0039] like Figure 7 As shown, in other embodiments of the present invention, each arcuate surface 6 is further formed with a wiping surface 16 at the end near the protrusion 7. Each wiping surface 16 intersects with a bottom cutting edge 9 to form a wiping edge 18. During machining, the wiping edge 18 on the bottom cutting edge 9 can further improve the cutting accuracy of the bottom cutting edge 9, making it suitable for machining workpieces with high surface roughness requirements.

[0040] 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. Multi-radius double-sided four-edge square shoulder milling insert, characterized in that: include: A blade body having a rectangular parallelepiped structure, wherein the blade body is formed with an upper plane and a lower plane, two side surfaces and two flank surfaces that are symmetrically arranged facing each other, and a circular arc surface is formed at the intersection of each side surface and the flank surface; The contour edges of the upper plane and the lower plane are each formed with two symmetrically arranged protrusions, the two protrusions on the upper plane / lower plane respectively intersect with the two adjacent side surfaces and the back cutting surface and extend obliquely toward the upper / lower side of the inner side of the blade body, the upper end surface / lower end surface of each protrusion is an inclined surface, and the intersection of each protrusion with one of the side surfaces, the back cutting surface and the arc surface is formed with a side edge, a bottom edge and a fillet, and a chip breaking area is formed between each protrusion and the upper plane or the lower plane; A mounting hole slot penetrating the blade body is provided at the center of the blade body.

2. The multi-radius double-sided four-edged square shoulder milling insert according to claim 1, characterized in that: Each of the chip breaking areas is formed with a first rake face, a second rake face and a curled face connected in sequence, each of the first rake faces is arranged at the upper end or the lower end of the protrusion, and each of the curled faces is smoothly connected to the upper plane or the lower plane.

3. The multi-radius double-sided four-edged square shoulder milling insert according to claim 2, characterized in that: Each of the first rake faces is a bevel, with a width ranging from 0.3 mm to 0.4 mm, a height ranging from 0.15 mm to 0.22 mm, and a first rake angle formed with the horizontal plane, each of the first rake angles ranging from 22° to 29°.

4. The multi-radius double-sided four-edged square shoulder milling insert according to claim 2, characterized in that: Each of the second rake surfaces is a curved surface, and forms a second rake angle with the horizontal plane. Each of the second rake angles is between 35° and 45°.

5. The multi-radius double-sided four-edged square shoulder milling insert according to claim 2, characterized in that: The angle between each of the curling surfaces and the horizontal plane is between 65° and 75°.

6. The multi-radius double-sided four-edged square shoulder milling insert according to claim 1, characterized in that: The height of each protrusion is between 0.25 mm and 0.4 mm.

7. The multi-radius double-sided four-edged square shoulder milling insert according to claim 1, characterized in that: The included angle between each adjacent side surface and the flank surface is 90°, and the radius of each fillet is between 0.4 mm and 2.4 mm.

8. The multi-radius double-sided four-edged square shoulder milling insert according to claim 1, characterized in that: Each of the flank surfaces is perpendicular to the upper plane and the lower plane.

9. The multi-radius double-sided four-edged square shoulder milling insert according to any one of claims 1 to 8, characterized in that: A finishing plane is formed at the end of each arc surface close to the protrusion, and each finishing plane intersects with a bottom edge to form a finishing edge.

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