Double-sided eight-edge indexable square shoulder milling cutter

Abstract

The utility model discloses a double-sided eight-edge indexable square shoulder milling cutter with chip separating grooves, which comprises a blade main body matched with a milling cutter arbor or a milling cutter disc, the blade main body comprises a main cutting edge, a sleeking edge and the chip separating grooves, the blade main body is of a cube structure, and a screw hole is formed in the center of the blade main body. The four main cutting edges on the same surface are symmetrically distributed in pairs; the main cutting edge is formed by intersecting a main cutting edge front tool face and a main cutting edge rear tool face, and the sleeking edge is formed by intersecting a sleeking edge front tool face and a sleeking edge rear tool face; the sleeking edge is connected with the main cutting edge through a tool nose fillet, and the chip separating groove is formed in the side face of the blade body. Cutting force can be greatly reduced, and the problem of cutter relieving of a small-diameter cutter is solved.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and in particular, to a double-sided eight-flute indexable square shoulder milling cutter. Background Technology

[0002] Square shoulder end mills, used in the machining industry, are widely applied in end milling for facing, edge cutting, and grooving. They are needed in almost every manufacturing workshop, and their application is constantly increasing. They are suitable for various machining applications, including plunge milling, ramp milling, drilling milling, helical milling, and face milling. However, commonly used double-sided eight-flute square shoulder end mills can experience excessive cutting forces during machining. Due to the poor rigidity of small-diameter tool holders, these small-diameter rod-shaped tools are prone to deflection at large depths of cut, thus affecting machining accuracy.

[0003] A patent with publication number CN101668604A discloses a cutting insert, a cutting tool, and a cutting method using the cutting tool. The cutting insert has: an upper surface; a lower surface; a side surface; a cutting edge formed at least a portion of the intersection of the upper surface and the side surface, and has a main cutting edge, a secondary cutting edge arranged at an obtuse angle to the main cutting edge in plan view, and an angular cutting edge located between the main cutting edge and the secondary cutting edge; and a groove formed on the side surface to reach the upper surface. The cutting insert is formed such that the sidewall of the angular cutting edge side of the groove is substantially parallel to the secondary cutting edge in plan view or approaches the secondary cutting edge as it moves inward into the groove. This cutting insert has a cutting edge on only one side, and stress concentration and interference are easily caused at the tip of the insert. Utility Model Content

[0004] This utility model addresses the problem that existing double-sided eight-flute square shoulder end mills have excessive cutting force during machining, and that due to the poor rigidity of small-diameter tool holders, small-diameter rod-shaped tools are prone to deflection at large depths of cut, thus affecting machining accuracy. A double-sided eight-flute indexable square shoulder end mill is proposed.

[0005] To address the aforementioned technical problems, the technical solution of this utility model is as follows:

[0006] A double-sided, eight-flute indexable square shoulder end mill includes an insert body that is fitted to a cutter shank or cutter disc. The insert body includes a main cutting edge, a finishing edge, and chip grooves. The insert body has a cubic structure with a screw hole at its center, and four main cutting edges are symmetrically distributed in pairs on the same face. The main cutting edge is formed by the intersection of the rake face and the flank face of the main cutting edge, and the finishing edge is formed by the intersection of the rake face and the flank face of the finishing edge. The finishing edge is connected to the main cutting edge through a fillet at the tip. The chip grooves are located on the sides of the insert body.

[0007] Furthermore, the chip-dividing groove divides the main cutting edge into several parts, and the two ends of the main cutting edge are connected to the chip-dividing groove; the chip-dividing grooves have the same shape, and the number of chip-dividing grooves on adjacent sides are three and four respectively, and the chip-dividing grooves are evenly distributed.

[0008] Furthermore, a cutting edge band is provided between the rake face and the flank face of the main cutting edge, and a cutting edge band is provided between the rake face and the flank face of the finishing edge.

[0009] Furthermore, both the main cutting edge rake face and the finishing edge rake face are curved surfaces, the main cutting edge flank face is a plane, and the finishing edge flank face is an arc surface.

[0010] Furthermore, both the main cutting edge and the finishing edge are inclined straight lines, and the inclination angle of the main cutting edge is approximately 95°.

[0011] Furthermore, the blade body is provided with two bottom mounting surfaces, both of which are planes, and the main cutting edge flank face serves as a side mounting surface.

[0012] Furthermore, the finishing edge back face is an arc surface with a radius of 63.5°±5°, and the angle α between the back angle of the main cutting edge and the bottom mounting surface is 4.95°.

[0013] Furthermore, the blade body has a concave arc surface around its perimeter and on the rake face at the tip radius to reduce cutting interference.

[0014] Furthermore, the blade body is mounted on the mounting slot of the tool holder or tool disc through the screw hole.

[0015] Furthermore, the axial mounting rake angle β of the blade body on the tool holder or tool groove is 2°, and the radial mounting clearance angle δ is 18.6°.

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

[0017] The double-sided eight-flute square shoulder end mill includes a insert body that is matched and installed with the end mill shank or end mill disc. The insert body includes a main cutting edge, a finishing edge, and chip flutes. The insert body has a cubic structure with a screw hole at the center. The four main cutting edges on the same face are symmetrically distributed in pairs. The upper and lower faces of the insert body are symmetrical about the axis of the screw hole. The main cutting edge is formed by the intersection of the rake face and the flank face of the main cutting edge. The finishing edge is formed by the intersection of the rake face and the flank face of the finishing edge. The finishing edge is connected to the main cutting edge through the fillet of the tip. The chip flutes are located on the side of the insert body. By evenly distributing chip flutes on the side of the insert body and installing it in conjunction with the end mill shank or end mill disc, the cutting force can be significantly reduced, thereby solving the problem of tool deflection for small-diameter tools. By adding chip flutes and optimizing the blade structure, the actual cutting edge length of each blade is shorter, thereby reducing the cutting force and improving the blade problem. At the same time, blades with chip flutes produce finer chips, resulting in better chip removal performance under the same chip removal groove space. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the square shoulder end mill of this utility model;

[0019] Figure 2 This is a top view of the square shoulder end mill of this utility model;

[0020] Figure 3 This is a front view of the square shoulder end mill of this utility model;

[0021] Figure 4 This is a schematic diagram of the square shoulder end mill of this utility model mounted on the cutter head;

[0022] Figure 5 This is a bottom view of the square shoulder end mill and cutter head installation of this utility model.

[0023] In the image above, 1. Insert body; 2. Main cutting edge; 3. Finishing edge; 4. Chip groove; 5. Side mounting surface; 6. Main cutting edge rake face; 7. Main cutting edge flank face; 8. Finishing edge rake face; 9. Finishing edge flank face; 10. Cutting edge band; 11. Screw hole; 12. Bottom mounting surface; 13. Cutting head; 14. Cutting tip radius. Detailed Implementation

[0024] To clearly illustrate the technical features of this utility model application, the present utility model 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 full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited to the specific embodiments disclosed below. Furthermore, 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," "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. 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 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 utility model, 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 connection 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 utility model, 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, the terms "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are 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 Figure 1As shown, a double-sided eight-flute indexable square shoulder end mill with chip-breaking grooves includes an insert body 1 that is matched and installed with the end mill shank or end mill disc. The insert body 1 includes a main cutting edge 2, a finishing edge 3, and chip-breaking grooves 4. The insert body 1 has a cubic structure, and a screw hole 11 is provided at the center of the insert body 1. The four main cutting edges 2 on the same face are symmetrically distributed in pairs. The upper and lower faces of the insert body 1 are symmetrical about the axis of the screw hole 11. The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 6 and the main cutting edge flank face 7. The finishing edge 3 is formed by the intersection of the finishing edge rake face 8 and the finishing edge flank face 9. The finishing edge 3 is connected to the main cutting edge 2 through the tip fillet 14. The chip-breaking grooves 4 are provided on the sides of the insert body 1.

[0027] like Figure 2 As shown, in this embodiment, the chip-breaking groove 4 divides the main cutting edge 2 into several parts, and both ends of the main cutting edge 2 are connected to the chip-breaking groove 4. One end of the chip-breaking groove 4 near the tip of the blade body 1 is connected to the main cutting edge 2, and the other end of the chip-breaking groove 4 is connected to the finishing edge 4. The chip-breaking grooves 4 have the same shape, and the number of chip-breaking grooves 4 on adjacent sides are three and four respectively, and the chip-breaking grooves 4 are evenly distributed. A cutting edge 10 is provided between the main cutting edge rake face 6 and the main cutting edge flank face 7, and a cutting edge 10 is provided between the finishing edge rake face 8 and the finishing edge flank face 9. Both the main cutting edge rake face 6 and the finishing edge rake face 8 are curved surfaces. The main cutting edge flank face 7 is a plane, and the finishing edge flank face 9 is an arc surface with a radius of 63.5°±5°. The main cutting edge 2 and the finishing edge 3 are both inclined straight lines. The inclination angle of the main cutting edge 2 is about 95°. The insert body 1 is provided with two bottom mounting surfaces 12. Both the bottom mounting surfaces 12 and the main cutting edge flank face 7 are planes. The main cutting edge flank face 7 serves as a side mounting surface 5. When the insert body 1 is mounted on the cutter head 13, the two adjacent side surfaces serve as side mounting surfaces 5.

[0028] like Figure 2 As shown, the multiple main cutting edges 2 divided by the chip groove 4 are collinear, and the angle α between the main cutting edge 2 and the bottom mounting surface 12 is 4.95°. The insert body 1 has an integrally connected arc concave surface on the rake face of the tool tip fillet to reduce cutting interference and ensure machining accuracy during cutting.

[0029] like Figure 2 As shown, under the same cutting depth, the width of the chip groove 4 is a, and the cutting edge length with the chip groove 4 is L-4a.

[0030] By adding chip groove 4, the actual cutting edge length of each insert participating in cutting is shortened, thereby reducing the cutting force and improving the cutting tool problem. At the same time, the insert with chip groove 4 produces finer chips, and the chip removal performance is better under the condition of chip removal groove in the same space.

[0031] Example 2

[0032] like Figure 1 As shown, a double-sided eight-flute indexable square shoulder end mill with chip-breaking grooves includes an insert body 1 that is matched and installed with the end mill shank or end mill disc. The insert body 1 includes a main cutting edge 2, a finishing edge 3, and chip-breaking grooves 4. The insert body 1 has a cubic structure, and a screw hole 11 is provided at the center of the insert body 1. The four main cutting edges 2 on the same face are symmetrically distributed in pairs. The upper and lower faces of the insert body 1 are symmetrical about the axis of the screw hole 11. The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 6 and the main cutting edge flank face 7. The finishing edge 3 is formed by the intersection of the finishing edge rake face 8 and the finishing edge flank face 9. The finishing edge 3 is connected to the main cutting edge 2 through the tip fillet 14. The chip-breaking grooves 4 are provided on the sides of the insert body 1.

[0033] like Figure 3 and Figure 4 As shown, the insert body 1 is matched and installed with the tool holder or cutter head 13. The insert body 1 is installed on the mounting groove of the tool holder or cutter head 13 through the screw hole 11. The axial installation rake angle β of the insert body 1 on the tool holder or cutter head 13 is 2° and the radial installation clearance angle δ is 18.6°, which can reduce cutting stress. Multiple square shoulder milling inserts can be installed on the cutter head 13 in sequence at the same time to improve cutting efficiency.

[0034] Example 3

[0035] like Figure 1 As shown, a double-sided eight-flute indexable square shoulder end mill with chip-breaking grooves includes an insert body 1 that is matched and installed with the end mill shank or end mill disc. The insert body 1 includes a main cutting edge 2, a finishing edge 3, and chip-breaking grooves 4. The insert body 1 has a cubic structure, and a screw hole 11 is provided at the center of the insert body 1. The four main cutting edges 2 on the same face are symmetrically distributed in pairs. The upper and lower faces of the insert body 1 are symmetrical about the axis of the screw hole 11. The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 6 and the main cutting edge flank face 7. The finishing edge 3 is formed by the intersection of the finishing edge rake face 8 and the finishing edge flank face 9. The finishing edge 3 is connected to the main cutting edge 2 through the tip fillet 14. The chip-breaking grooves 4 are provided on the sides of the insert body 1.

[0036] In this embodiment, the square shoulder end mill also includes a cutting insert sub-body. The cutting insert sub-body and the cutting insert body 1 are structurally symmetrical and are used in conjunction with the cutting insert body 1, or they can be used independently.

[0037] The blade body 1 can be formed by grinding or pressing.

[0038] Obviously, the above-described embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. 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 here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A double-sided, eight-flute indexable square shoulder end mill, comprising a insert body, characterized in that, The insert body includes a main cutting edge, a finishing edge, and chip-breaking grooves. The insert body has a cubic structure with a screw hole at the center. The four main cutting edges on the same face are symmetrically distributed in pairs. The main cutting edge is formed by the intersection of the rake face and the flank face of the main cutting edge. The finishing edge is formed by the intersection of the rake face and the flank face of the finishing edge. The finishing edge is connected to the main cutting edge through a rounded tip. The chip-breaking grooves are located on the sides of the insert body.

2. The double-sided eight-flute indexable square shoulder end mill according to claim 1, characterized in that, The chip-dividing groove divides the main cutting edge into several parts, and the two ends of the main cutting edge are connected to the chip-dividing groove; the chip-dividing grooves have the same shape, and the number of chip-dividing grooves on adjacent sides are three and four respectively, and the chip-dividing grooves are evenly distributed.

3. A double-sided eight-flute indexable square shoulder end mill according to claim 1, characterized in that, A cutting edge band is provided between the rake face and the flank face of the main cutting edge, and a cutting edge band is provided between the rake face and the flank face of the finishing edge.

4. A double-sided eight-flute indexable square shoulder end mill according to claim 3, characterized in that, Both the main cutting edge rake face and the finishing edge rake face are curved surfaces, the main cutting edge flank face is a plane, and the finishing edge flank face is an arc surface.

5. A double-sided eight-flute indexable square shoulder end mill according to claim 1, characterized in that, Both the main cutting edge and the finishing edge are inclined straight lines, and the inclination angle of the main cutting edge is approximately 95°.

6. A double-sided eight-flute indexable square shoulder end mill according to claim 1, characterized in that, The blade body is provided with a bottom mounting surface, and both the bottom mounting surface and the flank face of the main cutting edge are planes. The flank face of the main cutting edge serves as a side mounting surface.

7. A double-sided, eight-flute, indexable square shoulder end mill according to claim 6, characterized in that, The finishing edge has a circular arc surface with a radius of 63.5°±5°, and the angle α between the back angle of the main cutting edge and the bottom mounting surface is 4.95°.

8. A double-sided, eight-flute, indexable square shoulder end mill according to claim 1, characterized in that, The blade body has a concave arc surface around its perimeter and on the rake face at the tip radius to reduce cutting interference.

9. A double-sided eight-flute indexable square shoulder end mill according to claim 1, characterized in that, The blade body is mounted on the mounting slot of the tool holder or tool disc through the screw hole.

10. A double-sided, eight-flute, indexable square shoulder end mill according to claim 9, characterized in that, The axial mounting angle β of the blade body on the blade holder or blade groove is 2°, and the radial mounting angle δ is 18.6°.

Images