Multi-edge milling cutter

Abstract

The utility model provides a multi-edge milling cutter which comprises a blade body, an L-shaped cutting edge is arranged at the bottom of the side face of the blade body, and a chip rolling groove is formed in the inner side of the L-shaped cutting edge. Wave-shaped grooves are evenly distributed in the bottom of the blade body in the length direction, the wave-shaped grooves are perpendicular to the L-shaped cutting edges, and the wave-shaped grooves form wave edges at the positions of the L-shaped cutting edges. The milling cutter blade has the advantages that the L-shaped cutting edges with the wave edges are matched with the L-shaped chip rolling grooves, chip breaking is achieved, meanwhile, stability of cutting force can be effectively kept, and the technical problems that an existing milling cutter blade is unstable in chip breaking effect and large in cutting force fluctuation are solved.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a multi-blade end mill. Background Technology

[0002] In the field of metal cutting, end mills, as important rotary cutting tools, directly affect machining quality and efficiency through their structural design. Traditional end mill inserts generally employ equidistant helical or straight flute chip removal structures, which tend to generate continuous ribbon-like chips when machining high-toughness materials (such as stainless steel and titanium alloys). These chips are difficult to break effectively at high speeds, leading to frequent chip entanglement. This not only hinders the normal supply of cutting fluid but also causes secondary abrasion between the tool and the workpiece, resulting in scratches on the machined surface. Especially in deep cavity milling and closed-groove machining, obstructed chip removal channels easily lead to chip accumulation, forcing operators to frequently stop the machine for chip removal, significantly reducing machining efficiency and increasing the risk of abnormal tool wear.

[0003] Existing improvement solutions mostly involve optimizing the rake angle or adding chip breakers locally. However, due to insufficient matching of geometric parameters, problems such as unstable chip breaking effect and increased fluctuation of cutting force still exist, making it difficult to simultaneously meet the requirements of surface finish and smooth chip removal. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a multi-blade end mill that solves the technical problems of unstable chip breaking effect and large fluctuations in cutting force in existing end mill cutters.

[0005] A multi-blade end mill according to an embodiment of the present invention includes a blade body, wherein an L-shaped cutting edge is provided at the bottom of the side of the blade body, and a chip groove is provided on the inner side of the L-shaped cutting edge.

[0006] The bottom of the blade body is evenly distributed with wave grooves along the length direction. The wave grooves are perpendicular to the L-shaped cutting edge and form a wave edge at the L-shaped cutting edge.

[0007] The technical principle of this utility model is as follows: when cutting chips, the side of the L-shaped cutting edge with the wave edge serves as the peripheral cutting edge, while the other side of the L-shaped cutting edge serves as the end edge. The L-shaped chip groove can quickly curl the chips and discharge them from both sides, thereby improving chip removal efficiency.

[0008] The L-shaped cutting edge with a wave-like edge can transform the originally narrow and thin chips into thick and short fragments. Therefore, this application does not have a raised chip breaker, and the cutting force will not fluctuate significantly.

[0009] Meanwhile, the L-shaped cutting edge with a wavy edge also makes the cutting edge shorter, which can reduce cutting resistance, reduce the possibility of tool vibration, and facilitate heat dissipation. The cutting fluid can also penetrate into the cutting zone more easily, making full use of the cutting fluid and extending tool life.

[0010] Compared with the prior art, this utility model has the following advantages: by using an L-shaped cutting edge with a wave-like edge in conjunction with an L-shaped chip groove, chip breaking can be achieved while effectively maintaining the stability of the cutting force. This solves the technical problems of unstable chip breaking effect and large fluctuation of cutting force in existing milling inserts.

[0011] Furthermore, a chipper is formed at the intersection of the corrugated groove and the chip groove.

[0012] The chipper with a concave structure does not cause a sudden change in cutting force, and can further crush the originally thick and short chips into smaller particles, which can be discharged from the chip groove more easily.

[0013] Furthermore, the L-shaped cutting edge has an inclined blade at the bend, and the inclined blade extends to the bottom of the blade body to form an inclined surface with one end face.

[0014] By setting an inclined edge, the strength of the bending point of the L-shaped cutting edge, i.e. the strength of the cutting tip, is enhanced. At the same time, the side edge that originally served as the end edge of the L-shaped cutting edge is shortened, so that it can no longer form long and thin chips, but can only form thick and short fragments.

[0015] Furthermore, the top of the blade body away from the inclined surface and one end face are side positioning surfaces.

[0016] The purpose of setting two side positioning surfaces is to connect with the cutting tool, so that the cutting tool body can be stably fixed on the cutting tool.

[0017] Furthermore, the L-shaped cutting edge with a wavy edge is inclined from its bend toward the other side of the blade body.

[0018] It forms a void-free structure, which facilitates chip removal.

[0019] Furthermore, a raised positioning surface is provided on the inner side of the chip groove, and the raised positioning surface is close to the bend of the L-shaped cutting edge.

[0020] It serves to divert chips, allowing them to be discharged along both ends of the chip tray.

[0021] Furthermore, the raised positioning surface is parallel to the side of the L-shaped cutting edge with the wavy edge.

[0022] Avoid interference from the raised positioning surface with the L-shaped cutting edge.

[0023] Furthermore, a recess is provided on the top of the blade body near the bend of the L-shaped cutting edge.

[0024] This allows the chips to be discharged quickly, thus improving chip removal efficiency.

[0025] Furthermore, the recess is connected to the chip groove and the raised positioning surface by a rounded arc, and the raised positioning surface is connected to the chip groove by a rounded arc.

[0026] This makes chip curling and chip removal smoother, while avoiding sudden changes in cutting force.

[0027] Furthermore, the top of the side of the blade body is also provided with an L-shaped cutting edge, a chip groove and a wave groove, and the L-shaped cutting edge, chip groove and wave groove on the top are completely opposite in orientation to the L-shaped cutting edge, chip groove and wave groove on the bottom.

[0028] Two sets of milling structures are set on one side of the blade body, that is, one blade body is equivalent to two blades. When one blade is worn out, the blade body is mirrored and flipped to use the other set of milling structures, which can double the service life of the blade body.

[0029] Furthermore, recesses are connected to both ends of the chip groove.

[0030] The two recessed structures can be used simultaneously for chip removal in two sets of milling structures, which means that the original four recesses are reduced to two, thus reducing the complexity of the insert body structure.

[0031] Furthermore, the bottom and top of the other side of the blade body are also provided with L-shaped cutting edges, chip grooves and wave grooves, respectively, and the L-shaped cutting edges, chip grooves and wave grooves on the two sides are arranged in completely opposite directions.

[0032] The blade body has four sets of milling structures, meaning one blade body is equivalent to four blades. When one blade is worn out, the blade body can be mirrored or rotated 180 degrees to use another set of milling structures until all four sets of milling structures are damaged, which can extend the service life of the blade body by four times.

[0033] Furthermore, the blade body has screw holes at the top and bottom, and steps are provided on both sides of the screw holes.

[0034] Ensure that the insert body is securely fixed to the tool when using the four sets of milling structures. Attached Figure Description

[0035] Figure 1 This is a perspective view of a multi-blade end mill according to an embodiment of the present utility model.

[0036] Figure 2 This is a top view of a multi-blade end mill according to an embodiment of the present invention.

[0037] Figure 3 This is a side view of a multi-blade end mill according to an embodiment of the present invention.

[0038] Figure 4 This is a front view of a multi-blade end mill according to an embodiment of the present invention.

[0039] Figure 5 This is a bottom view of a multi-blade end mill according to an embodiment of the present invention.

[0040] In the above figures: 1. L-shaped cutting edge; 11. Inclined edge; 2. Chip groove; 21. Recess; 3. Raised positioning surface; 4. Inclined surface; 5. Wave groove; 51. Chip chipper; 6. Screw hole; 61. Step; 7. Side positioning surface. Detailed Implementation

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1-5 The multi-blade end mill shown includes a insert body with four milling structures. Each milling structure includes an L-shaped cutting edge 1, a chip groove 2, a raised positioning surface 3, and a wave groove 5. The following is a detailed description of the milling structure at the bottom of one side of the insert body.

[0043] Specifically, the bottom of the side of the blade body is provided with an L-shaped cutting edge 1, the inner side of the L-shaped cutting edge 1 is provided with a chip groove 2, the inner side of the chip groove 2 is provided with a raised positioning surface 3, the raised positioning surface 3 is close to the bend of the L-shaped cutting edge 1, wherein the bend of the L-shaped cutting edge 1 is provided with an inclined edge 11, the inclined edge 11 extends to the bottom of the blade body and forms an inclined surface 4 with one end face, and the top of the blade body away from the inclined surface 4 and one end face form a side positioning surface 7.

[0044] For the four milling structures, the bottom, top, and two end faces of the insert body are all side positioning surfaces 7. That is, a side positioning surface 7 at the bottom or top, together with a side positioning surface 7 at one of the end faces, constitutes a side positioning surface 7 for one milling structure. For the four milling structures, there are a total of four raised positioning surfaces 3. When two raised positioning surfaces 3 on the same side are used as positioning surfaces in the two milling structures on the other side, they are used to connect with the cutting tool.

[0045] When any milling structure is in use, there will be two raised positioning surfaces 3 on the same side, a side positioning surface 7 at the bottom or top, and a side positioning surface 7 at one of the two end faces, forming a three-axis positioning structure of XYZ, which ensures that the insert body can be stably fixed on the tool.

[0046] like Figure 1-5 As shown, the bottom of the insert body is evenly distributed with wave grooves 5 along the length direction. The wave grooves 5 are perpendicular to the L-shaped cutting edge 1. The wave grooves 5 form a wave edge at the L-shaped cutting edge 1. Specifically, the side of the L-shaped cutting edge 1 with the wave edge is inclined from its bend to the other side of the insert body. The top of the insert body is provided with a recess 21 on the side near the bend of the L-shaped cutting edge 1. The chip groove 2 is connected to the two milling structure recesses 21 on the same side at both ends. The inclination of the L-shaped cutting edge 1 and the structure of the recess 21 have the effect of making the chip removal of the milling structure more efficient.

[0047] Specifically, the recess 21 is connected to the chip groove 2 and the raised positioning surface 3 by a rounded transition, and the raised positioning surface 3 is connected to the chip groove 2 by a rounded transition to ensure smooth chip removal.

[0048] like Figure 1-5 As shown, the raised positioning surface 3 is parallel to the side of the L-shaped cutting edge 1 with the wavy edge, so two raised positioning surfaces 3 are needed to form the positioning of the X-axis.

[0049] like Figure 2 As shown, a chipper 51 is formed at the intersection of the wave groove 5 and the chip groove 2, which is used to further break up the chips.

[0050] like Figure 1-5 As shown, the L-shaped cutting edge 1, chip groove 2, raised positioning surface 3, and wave groove 5 on the top of the two milling structures on the same side are set in completely opposite directions to the L-shaped cutting edge 1, chip groove 2, raised positioning surface 3, and wave groove 5 on the bottom, that is, one bottom is on the left and the other top is on the right; while the four milling structures on both sides are set in completely opposite directions to the L-shaped cutting edge 1, chip groove 2, raised positioning surface 3, and wave groove 5 on both sides, that is, the other side corresponding to the bend of each L-shaped cutting edge 1 is a recess 21. This design can ensure that the insert body is roughly a cuboid structure and that the strength of each milling structure is similar.

[0051] like Figure 1-5 As shown, the top and bottom of the blade body are provided with screw holes 6, and steps 61 are provided on both sides of the screw holes 6 for screws to pass through and fix the blade body to the cutting tool.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-blade end mill, characterized in that: Includes a blade body, wherein an L-shaped cutting edge is provided at the bottom of the side of the blade body, and a chip groove is provided on the inner side of the L-shaped cutting edge; The bottom of the blade body is evenly distributed with wave grooves along the length direction. The wave grooves are perpendicular to the L-shaped cutting edge and form a wave edge at the L-shaped cutting edge.

2. A multi-blade end mill as described in claim 1, characterized in that: A chipper is formed at the intersection of the wave groove and the chip groove.

3. A multi-flute end mill as described in claim 1, characterized in that: The L-shaped cutting edge has an inclined blade at the bend, and the inclined blade extends to the bottom of the blade body to form an inclined surface with one end face.

4. A multi-flute end mill as described in claim 3, characterized in that: The top of the blade body away from the inclined surface and one end face are side positioning surfaces.

5. A multi-flute end mill as described in claim 1, characterized in that: The L-shaped cutting edge has a wavy side that slopes from its bend toward the other side of the blade body.

6. A multi-flute end mill as described in claim 5, characterized in that: The inner side of the chip groove is provided with a raised positioning surface, which is close to the bend of the L-shaped cutting edge.

7. A multi-flute end mill as described in claim 6, characterized in that: The raised positioning surface is parallel to the side of the L-shaped cutting edge with the wavy edge.

8. A multi-flute end mill as described in claim 6, characterized in that: The blade body has a recess on the side near the bend of the L-shaped cutting edge at the top.

9. A multi-flute end mill as described in claim 8, characterized in that: The recessed area transitions smoothly with the chip groove and the raised positioning surface, and the raised positioning surface is connected to the chip groove with a smooth arc transition.

10. A multi-flute end mill as described in any one of claims 1-9, characterized in that: The top of the side of the blade body is also provided with an L-shaped cutting edge, a chip groove and a wave groove. The L-shaped cutting edge, chip groove and wave groove on the top are completely opposite in direction to the L-shaped cutting edge, chip groove and wave groove on the bottom.

11. A multi-flute end mill as described in claim 10, characterized in that: The chip groove has recesses at both ends.

12. A multi-flute end mill as described in claim 10, characterized in that: The bottom and top of the other side of the blade body are also provided with L-shaped cutting edges, chip grooves and wave grooves, respectively, and the L-shaped cutting edges, chip grooves and wave grooves on the two sides are arranged in completely opposite directions.

13. A multi-flute end mill as described in claim 12, characterized in that: The blade body has screw holes at the top and bottom, and steps are provided on both sides of the screw holes.

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