A quick feed milling cutter with equal blade width combined groove

Abstract

The application discloses a fast-feed milling cutter piece with equal-width combined groove, which comprises a cutter body, the cutter body comprises a rake face, a relief face, a mounting face and a blade band, four cutter cutting edges are arranged around the rake face, each cutter cutting edge comprises a main cutting edge and a finishing edge arranged at one end of the main cutting edge, the blade band comprises a main cutting edge flat blade band and a main cutting edge negative chamfer blade band, the blade band angle of the main cutting edge flat blade band is 0°, the blade band angle of the main cutting edge negative chamfer blade band is a negative value, the main cutting edge flat blade band and the main cutting edge negative chamfer blade band are connected through a curved surface transition, the width of the main cutting edge flat blade band is equal to that of the main cutting edge negative chamfer blade band, and the equal-width structure is formed. The application solves the problem that the edge strength and cutting resistance of the traditional milling cutter piece cannot be dynamically adapted under different cutting depths.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of milling cutter, in particular, relates to a fast feed milling insert with equal blade width and combined groove. BACKGROUND

[0002] Milling cutter is a common cutting tool in machining, with the development of machining technology, the demand for rough milling efficiency is increasing day by day, therefore, fast feed milling insert with large metal removal rate is widely used in aerospace, automobile die and other machining industries. Fast feed milling cutter is a kind of cutter specially designed for high speed and large feed cutting, through the optimization of main offset angle and the design of multi blade structure, the balance of low cutting resistance and high material removal rate is realized, which is suitable for rough machining and semi-finishing machining, the core goal is to improve the efficiency while maintaining the stability of machining.

[0003] The main cutting edge groove design of traditional fast feed milling insert (such as positive angle blade, negative chamfer, flat blade, etc.) has the problem of dynamic adaptation of blade strength and cutting resistance when dealing with different cutting depths. The specific performance is as follows: in the small cutting depth (less than 0.5mm) working condition, although the traditional sharp groove (such as flat blade) has small cutting resistance, the blade strength is insufficient, and the insert is easy to wear; in the large cutting depth (greater than 0.5mm) working condition, although the traditional blunt type groove (such as negative chamfer) design has high strength, the cutting resistance is large, which affects the machining efficiency of workpiece. And the existing scheme (such as variable width blade) adjusts the strength by continuous change of blade width, but the structure is complex and the manufacturing precision is high, it is difficult to meet the needs of light and fast cutting and high strength.

[0004] The existing patent with patent number CN113263212A discloses a fast feed milling cutter insert, which includes an insert body; the contour projection of the insert body is a quadrilateral shape; the insert body has an upper surface, a bottom surface and a side surface; the upper surface of the four sides of the insert body intersects with the side surface to form the main cutting edge of the milling cutter insert, the adjacent main cutting edges are transitioned by a round corner at the corner part of the insert body and form a tool tip, and the tool tip has a round corner cutting edge; the upper surface of the insert body extends to the center part direction from the cutting edge and is provided with a rake face, a concave curved surface and a positioning surface; the width of the blade surface of the corner part of the insert body is surrounded by the outer arc formed by the contour line of the round corner transition and the preselected inner arc, and the radius of the inner arc is greater than the radius of the outer arc; when looking from the main cutting edge to the tool tip in the counterclockwise direction, the width of the blade surface of the corner part first increases and then decreases. Although the blade plane adopts negative angle (-30°~ -5°) to improve the stress distribution and the strength of the tool tip, the larger negative angle will reduce the cutting sharpness, leading to the increase of cutting force, and then affecting the machining efficiency, and the design of variable blade width and variable rake angle has high requirements on the machining process of the insert. SUMMARY

[0005] The present application mainly aims at the problems that the strength of the blade edge and the cutting resistance cannot be dynamically adapted when the traditional fast feed milling blade in the prior art is used to deal with different cutting depths, and proposes a fast feed milling blade with equal-width combined grooves.

[0006] The fast feed milling blade with equal-width combined grooves comprises a blade body, the blade body comprises a rake face, a relief face, a mounting surface and a blade band, four blade cutting edges are arranged around the rake face, each blade cutting edge comprises a main cutting edge and a finishing edge arranged at one end of the main cutting edge, two adjacent blade cutting edges are connected through a blade tip round corner, the main cutting edge and the finishing edge are formed by the intersection of the rake face and the relief face, and the mounting surface is arranged opposite to the main cutting edge; a plurality of grooves and protrusions are arranged on the rake face, and the grooves and the protrusions are alternately arranged on the rake face.

[0007] The blade band comprises a main cutting edge flat blade band and a main cutting edge negative chamfer blade band, the blade band angle of the main cutting edge flat blade band is 0°, the blade band angle of the main cutting edge negative chamfer blade band is negative, the main cutting edge flat blade band and the main cutting edge negative chamfer blade band are connected through a curved surface, the width of the main cutting edge flat blade band is equal to that of the main cutting edge negative chamfer blade band, and an equal-width structure is formed. The above-mentioned blade band angle represents the included angle between the plane where the blade band is located and the mounting surface (the mounting surface as the reference surface), and the blade band angle is negative, which means that the plane where the blade band is located and the rake face are inclined in opposite directions.

[0008] Further, the contour projection of the blade body is a quadrilateral shape, and a screw hole is arranged at the center of the blade body.

[0009] Further, the protrusions are reinforcing rib structures, and the grooves are in the shape of water droplets.

[0010] Further, the main offset angle of the main cutting edge is 8° to 10°, and the above-mentioned main offset angle is the included angle between the projection of the main cutting edge in the base surface (a plane perpendicular to the feed direction) of the tool and the feed motion direction.

[0011] Further, the main cutting edge is a straight line, and the finishing edge is an arc-shaped edge.

[0012] Further, the width of the main cutting edge flat blade band is 0.1 to 0.2 mm.

[0013] Further, the width of the main cutting edge flat blade band and the main cutting edge negative chamfer blade band is 0.15 mm.

[0014] Further, the main cutting edge flat blade band is parallel to the mounting surface, and the included angle between the main cutting edge negative chamfer blade band and the mounting surface is -8° to -12°.

[0015] Furthermore, the main cutting edge flat edge band is suitable for light cutting conditions where the cutting depth of the insert is less than 0.5 mm, and the main cutting edge negative chamfer edge band is suitable for heavy cutting conditions where the cutting depth of the insert is greater than 0.5 mm.

[0016] Furthermore, the rake face is inclined along the interior of the blade body, and the angle between the rake face and the mounting surface is 13°.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention includes a blade body comprising a rake face, a flank face, a mounting surface, and a cutting edge. The main cutting edge and the finishing edge are formed by the intersection of the rake face and the flank face. The cutting edge includes a flat cutting edge and a negative chamfer cutting edge. The flat cutting edge has a cutting edge angle of 0°, and the negative chamfer cutting edge has a negative cutting edge angle. The flat cutting edge and the negative chamfer cutting edge are connected by a curved surface transition, and their widths are equal, forming an equal-width structure. When the cutting depth is less than 0.5 mm, the flat cutting edge (0° cutting edge angle) provides a sharp cutting edge, reduces cutting resistance, and minimizes cutting heat and vibration, making it suitable for light and fast cutting and improving surface finish and processing efficiency. When the cutting depth is greater than 0.5 mm, the cutting edge is switched to a negative angle cutting edge (-8° to -12° cutting edge angle) to enhance edge strength, resist large cutting force impacts, prevent chipping or wear, and extend tool life. The main cutting edge of this invention maintains a fixed cutting width (e.g., 0.15mm) and achieves functional zoning only by adjusting the cutting edge angle, avoiding the complex machining processes (such as continuous cutting width gradients) required by traditional variable-width cutting edges. Through its segmented groove design, this invention can adapt to the machining needs of various materials such as steel, titanium alloys, and high-temperature alloys, accommodating both light and heavy cutting scenarios. (See attached drawings.)

[0019] Figure 1 A schematic diagram of the overall structure of a fast feed milling insert with a combined groove type and equal cutting width;

[0020] Figure 2 A top view of a fast-feed milling insert with a combined flute and equal cutting width;

[0021] Figure 3 A side view of a fast-feed milling insert with a combined groove type and equal cutting width;

[0022] Figure 4 A KK cross-sectional view of a fast feed milling insert with a combined groove type and equal cutting width;

[0023] Figure 5 This is an LL sectional view of a fast feed milling insert with a combined groove type and equal cutting width.

[0024] In the above figure, 1. Main cutting edge; 2. Finishing edge; 3. Rake face; 4. Flank face; 5. Tool tip radius; 6. Main cutting edge flat cutting edge; 7. Main cutting edge negative chamfer cutting edge; 8. Groove; 9. Raised groove; 10. Curved surface; 11. Screw hole; 12. Mounting surface; α. Principal cutting edge angle; β. Angle between the rake face and the mounting surface; γ. Angle between the main cutting edge negative chamfer cutting edge and the horizontal; L. Cutting edge width; D. Depth of cut. Detailed Implementation

[0025] To clearly illustrate the technical features of the present invention, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below. Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They 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 the present application. In addition, 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 with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise explicitly specified and limited, "on" or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0026] Example 1

[0027] like Figures 1 to 3As shown, a fast feed milling insert with equal cutting width and combined groove type includes an insert body. The insert body includes a rake face 3, a flank face 4, a mounting surface 12, and a cutting edge. The rake face 3 has four cutting edges around its perimeter. Each cutting edge includes a main cutting edge 1 and a finishing edge 2 located at one end of the main cutting edge 1. Adjacent cutting edges are connected by a fillet 5. The main cutting edge 1 and the finishing edge 2 are formed by the intersection of the rake face 3 and the flank face 4. The mounting surface 12 is positioned opposite to the main cutting edge 1. The rake face 3 has multiple grooves 8 and protrusions 9, which are alternately arranged on the rake face 3.

[0028] The cutting edge includes a main cutting edge flat cutting edge 6 and a main cutting edge negative chamfer cutting edge 7. The cutting edge angle of the main cutting edge flat cutting edge 6 is 0°, and the cutting edge angle of the main cutting edge negative chamfer cutting edge 7 is negative. The main cutting edge flat cutting edge 6 and the main cutting edge negative chamfer cutting edge 7 are connected by a curved surface 10, and the widths of the main cutting edge flat cutting edge 6 and the main cutting edge negative chamfer cutting edge 7 are equal, forming an equal cutting edge width structure.

[0029] In this embodiment, the outer contour projection of the blade body is a quadrilateral structure, and the blade body is symmetrical about its central axis. For example... Figure 1 and Figure 3 As shown, the main cutting edge 1 is a straight edge, the finishing edge 2 is an arc edge, and adjacent cutting edges are connected by a tool tip fillet 5.

[0030] like Figure 4 and Figure 5 As shown, the angle β between the rake face 3 and the mounting surface is 13°. The flat cutting edge area on the insert body has a cutting edge angle of 0° for the main cutting edge flat cutting edge 6, which is parallel to the mounting surface and has a width L of 0.15mm. This is suitable for light cutting with a depth of cut D≤0.5mm, such as finishing aluminum alloys. It has low cutting resistance, improving the machining quality and efficiency of parts. The negative angle cutting edge area on the insert body has a width L of 0.15mm for the main cutting edge negative chamfering cutting edge 7, which has an angle γ of -10° with the mounting surface. This is suitable for heavy cutting with a depth of cut D>0.5mm, such as rough machining of steel parts. It enhances the edge strength, resists the impact of large cutting forces, avoids chipping or wear, and extends tool life. Figure 1 and Figure 2 As shown, the main cutting edge flat edge band 6 and the main cutting edge negative chamfer edge band 7 are connected by a smooth curved surface transition. The length of the transition section is 0.08mm, which avoids stress concentration, ensures smooth transmission of cutting force, and reduces vibration.

[0031] In this embodiment, the blade body is made of cemented carbide and coated with a TiAlN wear-resistant coating with a thickness of 3μm.

[0032] like Figure 2 As shown, the principal cutting edge angle α is 9°, which optimizes the cutting force direction and improves machining stability. This invention is formed using precision grinding, with the cutting edge angle tolerance controlled within ±0.3°. A screw hole 11 is provided at the center of the insert body, and the insert is fixed to the rapid feed milling cutter head by a wedge-shaped locking mechanism.

[0033] Example 2

[0034] like Figures 1 to 3 As shown, a fast feed milling insert with equal cutting width and combined groove type includes an insert body. The insert body includes a rake face 3, a flank face 4, a mounting surface 12, and a cutting edge. The rake face 3 has four cutting edges around its perimeter. Each cutting edge includes a main cutting edge 1 and a finishing edge 2 located at one end of the main cutting edge 1. Adjacent cutting edges are connected by a fillet 5. The main cutting edge 1 and the finishing edge 2 are formed by the intersection of the rake face 3 and the flank face 4. The mounting surface 12 is positioned opposite to the main cutting edge 1. The rake face 3 has multiple grooves 8 and protrusions 9, which are alternately arranged on the rake face 3.

[0035] In this embodiment, as Figure 4 and Figure 5 As shown, the flat cutting edge area: the main cutting edge flat cutting edge 6 has a cutting edge angle of 0° and a cutting edge width L of 0.1mm (ultra-fine cutting edge), suitable for ultra-fine machining with a cutting depth D≤0.5mm, such as mold surface polishing. The negative angle cutting edge area: the main cutting edge negative chamfer cutting edge 7 has an angle γ of -8° with the mounting surface and a cutting edge width L of 0.1mm, suitable for medium-load machining with a cutting depth D>0.5mm, such as stainless steel slot milling. A smooth curve transition is used between the two cutting edges, with a transition section length of 0.05mm to ensure no sudden changes in cutting force.

[0036] In this embodiment, the principal cutting angle α is set to 8° to further reduce the radial cutting force and improve the surface finish. Figure 1 and Figure 2 As shown, multiple sets of grooves 8 and convex grooves 9 are evenly arranged around the perimeter of the blade body. The grooves 8 and convex grooves 9 are arranged alternately and symmetrically. The grooves 8 have a teardrop-shaped structure to reduce the contact area and lower cutting heat. The convex grooves 9 are reinforcing ribs to increase the strength of the chip removal groove.

[0037] The blade in this embodiment is processed by a five-axis linkage grinding machine. The tolerance of the cutting edge angle is ±0.2° and the surface roughness Ra≤0.1μm. It is mainly targeted at high value-added fields such as aerospace precision parts and medical devices to achieve a mirror finish (Ra≤0.4μm) and reduce subsequent polishing processes.

[0038] Example 3

[0039] likeFigures 1 to 3 As shown, a fast feed milling insert with equal cutting width and combined groove type includes an insert body. The insert body includes a rake face 3, a flank face 4, a mounting surface 12, and a cutting edge. The rake face 3 has four cutting edges around its perimeter. Each cutting edge includes a main cutting edge 1 and a finishing edge 2 located at one end of the main cutting edge 1. Adjacent cutting edges are connected by a fillet 5. The main cutting edge 1 and the finishing edge 2 are formed by the intersection of the rake face 3 and the flank face 4. The mounting surface 12 is positioned opposite to the main cutting edge 1. The rake face 3 has multiple grooves 8 and protrusions 9, which are alternately arranged on the rake face 3.

[0040] In this embodiment, as Figure 4 and Figure 5 As shown, the flat cutting edge area: the cutting edge angle of the main cutting edge flat cutting edge 6 is 0°, and the cutting edge width L is 0.2mm, suitable for light cutting with a depth of cut D≤0.5mm (such as roughing with Inconel 718). The negative angle cutting edge area: the angle γ between the main cutting edge negative chamfer cutting edge 7 and the mounting surface is -12°, and the cutting edge width L is 0.2mm, suitable for heavy-duty machining with a depth of cut D>0.5mm (such as deep groove milling of nickel-based high-temperature alloys).

[0041] The principal cutting edge angle α is set to 10° to enhance tool rigidity and resist the high cutting forces of high-temperature alloys. The insert features internal micro-cooling channels (achieved through laser drilling) in conjunction with an external high-pressure cooling system to reduce cutting temperature. The insert is mounted using a hydraulic clamping mechanism to ensure stability under heavy loads and prevent chipping due to vibration.

[0042] The cutting tool in this embodiment is mainly suitable for heavy-duty machining scenarios of high-temperature alloys such as aero-engine blades and gas turbine components.

[0043] Obviously, the embodiments described above are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A quick feed milling insert of equal land width combined flute type, characterized by, The cutting insert comprises an insert body, the insert body comprises a rake face, a relief face, a mounting face and a land, the rake face is provided with four cutting edges, each cutting edge comprises a main cutting edge and a finishing edge arranged at one end of the main cutting edge, two adjacent cutting edges are connected by a nose corner, the main cutting edge and the finishing edge are formed by the intersection of the rake face and the relief face, and the mounting face is arranged opposite to the main cutting edge; a plurality of grooves and protrusions are arranged on the rake face, and the grooves and the protrusions are arranged alternately on the rake face; The land comprises a main cutting edge flat land and a main cutting edge negative chamfer land, the land angle of the main cutting edge flat land is 0°, the land angle of the main cutting edge negative chamfer land is a negative value, the main cutting edge flat land and the main cutting edge negative chamfer land are connected by a curved surface, and the width of the main cutting edge flat land and the main cutting edge negative chamfer land is equal, forming an equal land width structure.

2. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The contour projection of the insert body is a quadrilateral shape, and a screw hole is arranged at the center of the insert body.

3. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The protrusion is a reinforcing rib structure, and the groove is in the shape of a water droplet.

4. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The main relief angle of the main cutting edge is 8° to 10°.

5. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The main cutting edge is a straight line, and the finishing edge is an arc.

6. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The width of the main cutting edge flat land is 0.1 to 0.2 mm.

7. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The width of the main cutting edge flat land and the main cutting edge negative chamfer land is 0.15 mm.

8. A quick feed cutter insert of equal blade width combined groove type according to claim 1, characterized in that, The main cutting edge flat land is parallel to the mounting face, and the angle between the main cutting edge negative chamfer land and the mounting face is -8° to -12°.

9. A quick feed cutter insert of equal blade width combined groove type according to claim 8, characterized in that, The main cutting edge flat land is suitable for light cutting working conditions with a cutting depth of less than 0.5 mm, and the main cutting edge negative chamfer land is suitable for heavy cutting working conditions with a cutting depth of more than 0.5 mm.

10. A quick feed cutter insert of equal blade width combination groove type according to claim 1, characterized in that, The rake face is inclined along the inside of the insert body, and the angle between the rake face and the mounting face is 13°.

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