Double-sided eight-blade shoulder milling cutter

Abstract

The utility model discloses a double -sided eight blade square shoulder milling cutter piece, including the appearance hexahedron cutter body, the cutter body includes upper surface, lower surface and side, upper surface and lower surface are provided with the screw hole that penetrates, upper surface and side intersection form four cutting edges, lower surface and side intersection form four cutting edges, cutting edge includes the nose circle and main cutting edge, and the main cutting edge is linearly connected with the nose circle, the utility model discloses through the removal of the conventional curve shape light trimming structure, when cutting in small diameter, the highest point of cutting edge is at the nose circle end, and the nose circle directly removes the workpiece, solve the problem that the machining surface roughness of the existing cutter light trimming to material extrusion leads, and the cutter has the perpendicularity of processing simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and more specifically, to a double-sided eight-flute square shoulder milling insert. Background Technology

[0002] Double-sided eight-flute square shoulder milling inserts are a type of high-efficiency and economical indexable cutting tool designed specifically for square shoulder milling. They are mainly used in metalworking to achieve efficient milling of 90° right-angled stepped surfaces. These inserts typically have an arc-shaped finishing edge to improve the surface quality of the workpiece. However, when paired with a small-diameter tool holder (below 32mm), the small curvature of the tool holder makes it difficult to balance perpendicularity and surface roughness in terms of the cutting edge angle and position of the insert.

[0003] Application No. 202410838728.5 discloses an anti-interference milling insert and cutter head, including a first surface, a second surface, a side mounting surface, and a main cutting edge. Adjacent main cutting edges are connected sequentially in a clockwise direction by a tool tip arc and a finishing edge. The finishing edge is an arc-shaped finishing edge. There is a transition surface between the tool tip arc and the first / second surface. The main cutting edge has an angle with the first or second surface, so that the transition surface integrally connected with the rake face of the finishing edge has an arc-shaped concave structure. The arc of the finishing edge of the insert is higher than the arc of the tool tip. The cutting diagram of the finishing edge during machining is shown in the figure. Figure 1 As shown, the material is first removed by the tip arc. Since the finishing blade arc is higher than the tip arc, there is an ultra-thin layer of material that is processed by the finishing blade. However, since the blade edge cannot cut very thin material after being blunted, this part of the material is squeezed by the finishing blade, resulting in poor surface roughness of the workpiece. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a double-sided eight-blade square shoulder milling insert.

[0005] The technical solution adopted in this utility model is:

[0006] A double-sided eight-flute square shoulder milling insert includes a insert body with a hexahedral shape. The insert body includes an upper surface, a lower surface, and a side surface. The upper and lower surfaces are provided with through screw holes. Four cutting edges are formed at the intersection of the upper surface and the side surface. Four cutting edges are formed at the intersection of the lower surface and the side surface. Each cutting edge includes a tip arc and a main cutting edge. The main cutting edge and the tip arc are connected in a straight line.

[0007] Furthermore, the main cutting edge is tilted downwards, so that the highest point of the cutting edge is located at the tip arc.

[0008] Furthermore, the blade body is symmetrical along the center of the screw hole.

[0009] Furthermore, the upper or lower surface is provided with a rake face, which is arc-shaped.

[0010] Furthermore, the upper or lower surface is provided with a mounting surface.

[0011] Furthermore, a cutting edge band is provided on the main cutting edge.

[0012] Furthermore, four are provided on the side.

[0013] Furthermore, the side surface is provided with a side mounting surface.

[0014] Furthermore, the blade body is formed by grinding or pressing.

[0015] Furthermore, the surface of the blade body is coated with a wear-resistant coating.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The main cutting edge of this invention's double-sided eight-flute square shoulder milling insert is connected to the tip arc in a straight line. By removing the conventional curved finishing edge structure, the highest point of the cutting edge is at the tip arc end when cutting small diameters. The tip arc directly cuts off the workpiece, solving the problem of poor surface roughness caused by the material compression of existing insert finishing edges. At the same time, this insert also takes into account the perpendicularity of the machining. Attached Figure Description

[0018] Figure 1 A schematic diagram of a double-sided, eight-flute square shoulder end mill;

[0019] Figure 2 A schematic diagram of machining a double-sided eight-flute square shoulder milling cutter with a finishing edge;

[0020] Figure 3 This is a schematic diagram showing the contact between the cutting edge of a double-sided eight-flute square shoulder milling insert with a finishing edge and the workpiece.

[0021] Figure 4 This is a schematic diagram of the machining of the double-sided eight-flute square shoulder milling cutter of this utility model;

[0022] Figure 5 This is a schematic diagram showing the contact between the cutting edge of the double-sided eight-flute square shoulder milling insert of this utility model and the workpiece.

[0023] Among them: 1. Top surface; 2. Side surface; 3. Screw hole; 4. Main cutting edge; 5. Rake face; 6. Cutting edge; 7. Finishing edge; 8. Tip arc. Detailed Implementation

[0024] To clearly illustrate the technical features of this solution, 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 this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this 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 this application 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. Therefore, they should not be construed as limitations on this 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.

[0025] Example 1

[0026] like Figures 1 to 5As shown, this embodiment provides a double-sided eight-flute square shoulder milling insert, including an insert body with a hexahedral shape. The insert body includes an upper surface 1, a lower surface, and a side surface 2. The upper surface 1 and the lower surface are provided with through screw holes 3. The insert body is symmetrical about the center of the screw holes 3. Four cutting edges are formed at the intersection of the upper surface 1 and the side surface. A rake face 5 is provided on the upper surface 1 or the lower surface. The rake face is arc-shaped 5. Four cutting edges are formed at the intersection of the lower surface and the side surface 2. The cutting edges include a tip arc 8 and a main cutting edge 4. The main cutting edge 4 is connected to the tip arc 8 in a straight line.

[0027] The upper surface 1 or the lower surface is provided with a mounting surface, and the side surface 2 is provided with four mounting surfaces. The mounting surface of the upper surface 1 or the lower surface is matched with the cutter head for limiting cooperation, and the side mounting surface is matched with the cutter head for limiting cooperation. Then, the blade body is locked onto the cutter head by screws.

[0028] like Figures 2 to 3 As shown, a certain type of double-sided eight-flute square shoulder end mill with a finishing edge, when performing cutting operations, first removes the material through the tip arc, and then finishes the material surface through the finishing edge 7. Because the finishing edge arc is higher than the tip arc, a very thin layer of material is processed by the finishing edge. However, because the cutting edge is dulled, it cannot cut very thin material, causing this part of the material to be squeezed by the finishing edge, resulting in poor workpiece surface roughness. When using a small cutter head for clamping operations, compared to a large cutter head, its space is smaller and its curvature is smaller, making it difficult to position the cutting edge, and the machined workpiece is more prone to poor surface roughness. Compared to traditional double-sided eight-flute square shoulder end mills with finishing edges, the double-sided eight-flute square shoulder end mill of this embodiment does not have a curved finishing edge structure. When performing small-diameter milling (less than 32mm), the tool finishing effect is actually improved, and the workpiece surface finish is better than that produced by end mills with finishing edges. Figures 4 to 5 As shown, in this embodiment, the main cutting edge 4 is inclined downward, so that the highest point of the cutting edge is located at the tip arc 8. The tip arc 8 directly cuts off the workpiece, avoiding the problem of poor surface roughness caused by the material being squeezed by the existing blade finishing structure. At the same time, this blade also takes into account the perpendicularity of the machining.

[0029] Example 2

[0030] like Figures 1 to 5As shown, this embodiment provides a double-sided eight-flute square shoulder milling insert, including an insert body with a hexahedral shape. The insert body includes an upper surface 1, a lower surface, and a side surface 2. The upper surface 1 and the lower surface are provided with through screw holes 3. The insert body is symmetrical about the center of the screw holes 3. Four cutting edges are formed at the intersection of the upper surface 1 and the side surface. A rake face 5 is provided on the upper surface 1 or the lower surface. The rake face is arc-shaped 5. Four cutting edges are formed at the intersection of the lower surface and the side surface 2. The cutting edges include a tip arc 8 and a main cutting edge 4. The main cutting edge 4 is connected to the tip arc 8 in a straight line.

[0031] The upper surface 1 or the lower surface is provided with a mounting surface, and the side surface 2 is provided with four mounting surfaces. The mounting surface of the upper surface 1 or the lower surface is matched with the cutter head for limiting cooperation, and the side mounting surface is matched with the cutter head for limiting cooperation. Then, the blade body is locked onto the cutter head by screws.

[0032] like Figures 2 to 3 As shown, a certain type of double-sided eight-flute square shoulder end mill with a finishing edge, when performing cutting operations, first removes the material through the tip arc, and then finishes the material surface through the finishing edge 7. Because the finishing edge arc is higher than the tip arc, a very thin layer of material is processed by the finishing edge. However, because the cutting edge is dulled, it cannot cut very thin material, causing this part of the material to be squeezed by the finishing edge, resulting in poor workpiece surface roughness. When using a small cutter head for clamping operations, compared to a large cutter head, its space is smaller and its curvature is smaller, making it difficult to position the cutting edge, and the machined workpiece is more prone to poor surface roughness. Compared to traditional double-sided eight-flute square shoulder end mills with finishing edges, the double-sided eight-flute square shoulder end mill of this embodiment does not have a curved finishing edge structure. When performing small-diameter milling (less than 32mm), the tool finishing effect is actually improved, and the workpiece surface finish is better than that produced by end mills with finishing edges. Figures 4 to 5 As shown, in this embodiment, the main cutting edge 4 is inclined downward, so that the highest point of the cutting edge is located at the tip arc 8. The tip arc 8 directly cuts off the workpiece, avoiding the problem of poor surface roughness caused by the material being squeezed by the existing blade finishing structure. At the same time, this blade also takes into account the perpendicularity of the machining.

[0033] Furthermore, a cutting edge band 6 is provided on the main cutting edge 4, with a width of 0.1mm to 0.3mm. The cutting edge band 6 forms a small planar support on the cutting edge, dispersing the cutting impact force and reducing the risk of chipping of the cutting edge.

[0034] Example 3

[0035] like Figures 1 to 5As shown, this embodiment provides a double-sided eight-flute square shoulder milling insert, including an insert body with a hexahedral shape. The insert body includes an upper surface 1, a lower surface, and a side surface 2. The upper surface 1 and the lower surface are provided with through screw holes 3. The insert body is symmetrical about the center of the screw holes 3. Four cutting edges are formed at the intersection of the upper surface 1 and the side surface. A rake face 5 is provided on the upper surface 1 or the lower surface. The rake face is arc-shaped 5. Four cutting edges are formed at the intersection of the lower surface and the side surface 2. The cutting edges include a tip arc 8 and a main cutting edge 4. The main cutting edge 4 is connected to the tip arc 8 in a straight line.

[0036] The upper surface 1 or the lower surface is provided with a mounting surface, and the side surface 2 is provided with four mounting surfaces. The mounting surface of the upper surface 1 or the lower surface is matched with the cutter head for limiting cooperation, and the side mounting surface is matched with the cutter head for limiting cooperation. Then, the blade body is locked onto the cutter head by screws.

[0037] like Figures 2 to 3 As shown, a certain type of double-sided eight-flute square shoulder end mill with a finishing edge, when performing cutting operations, first removes the material through the tip arc, and then finishes the material surface through the finishing edge 7. Because the finishing edge arc is higher than the tip arc, a very thin layer of material is processed by the finishing edge. However, because the cutting edge is dulled, it cannot cut very thin material, causing this part of the material to be squeezed by the finishing edge, resulting in poor workpiece surface roughness. When using a small cutter head for clamping operations, compared to a large cutter head, its space is smaller and its curvature is smaller, making it difficult to position the cutting edge, and the machined workpiece is more prone to poor surface roughness. Compared to traditional double-sided eight-flute square shoulder end mills with finishing edges, the double-sided eight-flute square shoulder end mill of this embodiment does not have a curved finishing edge structure. When performing small-diameter milling (less than 32mm), the tool finishing effect is actually improved, and the workpiece surface finish is better than that produced by end mills with finishing edges. Figures 4 to 5 As shown, in this embodiment, the main cutting edge 4 is inclined downward, so that the highest point of the cutting edge is located at the tip arc 8. The tip arc 8 directly cuts off the workpiece, avoiding the problem of poor surface roughness caused by the material being squeezed by the existing blade finishing structure. At the same time, this blade also takes into account the perpendicularity of the machining.

[0038] Furthermore, the surface of the blade body is coated with a wear-resistant coating, which further enhances the wear resistance of the blade and improves the overall lifespan of the tool.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-sided eight-flute square shoulder milling cutter, characterized in that, The blade body includes a hexahedral blade body, which includes an upper surface, a lower surface, and a side surface. The upper and lower surfaces are provided with through screw holes. Four cutting edges are formed at the intersection of the upper surface and the side surface. Four cutting edges are formed at the intersection of the lower surface and the side surface. Each cutting edge includes a tip arc and a main cutting edge. The main cutting edge and the tip arc are connected in a straight line.

2. The double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The main cutting edge is tilted downwards so that the highest point of the cutting edge is located at the tip arc.

3. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The blade body is symmetrical about the center of the screw hole.

4. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The upper or lower surface is provided with a front cutting face, which is arc-shaped.

5. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The upper or lower surface is provided with a mounting surface.

6. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The main cutting edge is provided with a cutting edge band.

7. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The side has four.

8. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The side is provided with a side mounting surface.

9. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The blade body is formed by grinding or pressing.

10. A double-sided eight-flute square shoulder milling cutter according to claim 1, characterized in that, The blade body surface is coated with a wear-resistant coating.

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