Plugging milling cutter

Abstract

The utility model discloses a plunge milling cutter. The plunge milling cutter comprises a cutter neck part and a blade part, one end of the cutting edge part is connected with the cutter neck part, the other end of the cutting edge part is provided with a plurality of end edges and a plurality of flow guide grooves, the end edges are circumferentially arranged around the axis of the cutting edge part, the flow guide grooves are arranged corresponding to the end edges, the two opposite ends of the flow guide grooves in the extending direction of the flow guide grooves extend to the circumferential side of the cutting edge part respectively, and the groove walls of the flow guide grooves are connected with the corresponding end edges. According to the plunge milling cutter, the multiple flow guide grooves are formed in the blade part, and the two opposite ends, in the extending direction of the flow guide grooves, of the flow guide grooves extend to the peripheral side of the blade part correspondingly, so that the two opposite ends of the flow guide grooves can exchange cooling liquid and discharge cutting chips; and the cooling liquid can discharge the cutting chips in the diversion trench more quickly, so that the damage of the cutting chips to the plunge milling cutter is reduced, and the service life of the plunge milling cutter is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metal milling, in particular to a plunge milling cutter. Background Art

[0002] With the increasingly wide application of titanium alloy in the 3C industry, more and more parts are made of titanium alloy. Correspondingly, in the mechanical processing industry, the processing proportion of titanium alloy parts is also getting higher and higher.

[0003] Due to the high strength of titanium alloy, it is difficult for existing tools to mill titanium alloy workpieces. The cutting chips generated during the machining of titanium alloy workpieces by the tools will cause great damage to the tools, resulting in a lower service life of the existing tools. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. The utility model provides a plunge milling cutter with a longer service life.

[0005] According to the plunge milling cutter provided by the embodiment of the utility model, it includes a tool neck and a cutting edge part; one end of the cutting edge part is connected to the tool neck, and several end edges and several diversion grooves are arranged at the other end of the cutting edge part. The end edges are arranged circumferentially around the axis of the cutting edge part. The diversion grooves are arranged corresponding to the end edges, and both opposite ends of the diversion grooves in the extending direction of the diversion grooves extend to the circumferential side of the cutting edge part respectively. The groove wall of the diversion groove is connected to the corresponding end edge.

[0006] The plunge milling cutter of the utility model has at least the following beneficial effects: In the plunge milling cutter of the present application, several diversion grooves are arranged on the cutting edge part, and both opposite ends of the diversion grooves in the extending direction of the diversion grooves extend to the circumferential side of the cutting edge part respectively, so that coolant exchange and chip discharge can be carried out at both opposite ends of the diversion grooves. When the plunge milling cutter works, the coolant can more quickly discharge the cutting chips in the diversion grooves, thereby reducing the damage of the cutting chips to the plunge milling cutter, and further extending the service life of the plunge milling cutter.

[0007] According to the plunge milling cutter of the embodiment of the utility model, the diversion groove passes through the axis of the cutting edge part.

[0008] According to the plunge milling cutter of the embodiment of the utility model, along the depth direction of the diversion groove, the width dimension of the diversion groove gradually decreases.

[0009] According to the plunge milling cutter of the embodiment of the utility model, the depth of the diversion groove is 0.1 mm, and the width of the diversion groove opening is 0.15 mm.

[0010] According to the plunge milling cutter of the embodiment of the utility model, the rake face of the end edge has an end-edge rake angle, and the flank face of the end edge has an end-edge clearance angle. The end-edge rake angle is 5°±1°, and the end-edge clearance angle is 4°±1°.

[0011] According to the insert milling cutter described in the embodiments of the present utility model, the insert milling cutter is a T-shaped insert milling cutter, and a plurality of peripheral cutting edges are provided on the circumferential side of the cutting edge portion, and the peripheral cutting edges are arranged corresponding to the end cutting edges.

[0012] According to the insert milling cutter described in the embodiments of the present utility model, a first peripheral cutting edge relief angle and a second peripheral cutting edge relief angle are provided on the flank of the peripheral cutting edge, a peripheral cutting edge rake angle is provided on the rake face of the peripheral cutting edge, the first peripheral cutting edge relief angle is 12° ± 2°, the second peripheral cutting edge relief angle is 25° ± 4°, and the peripheral cutting edge rake angle is 2° ± 1°.

[0013] According to the insert milling cutter described in the embodiments of the present utility model, a plurality of protrusions corresponding to the end cutting edges are provided on the end edge of the cutting edge portion, and the end cutting edge portion extends to the protrusions.

[0014] According to the insert milling cutter described in the embodiments of the present utility model, the helix angle of the peripheral cutting edge is 25°.

[0015] According to the insert milling cutter described in the embodiments of the present utility model, the diameter of the cutting edge portion is D, and the core diameter of the peripheral cutting edge is 0.5D.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 is a schematic structural diagram of an insert milling cutter according to an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 an axial schematic diagram of the insert milling cutter shown;

[0020] Figure 3 is Figure 1 a partial enlarged view of the structure at A of the insert milling cutter shown;

[0021] Figure 4 is a schematic structural diagram of an end cutting edge according to an embodiment of the present utility model;

[0022] Figure 5 is Figure 2 a sectional view taken along the line B-B of the insert milling cutter shown;

[0023] Figure 6 is a schematic structural diagram of a peripheral cutting edge according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] Tool neck 100;

[0026] Cutting edge part 200; end cutting edge 210; end cutting edge rake angle 211; end cutting edge clearance angle 212; chip fluting 220; peripheral cutting edge 230; first peripheral cutting edge clearance angle 231; second peripheral cutting edge clearance angle 232; peripheral cutting edge rake angle 233; protrusion 240. Detailed implementation mode

[0027] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation on the present invention.

[0029] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0031] Next, refer to Figures 1 to 6 to describe the plunge milling cutter of the present application in detail.

[0032] Refer to Figures 1 to 3 , the plunge milling cutter according to the embodiment of the present invention includes a tool neck 100 and a cutting edge part 200; one end of the cutting edge part 200 is connected to the tool neck 100, and several end cutting edges 210 and several chip flutings 220 are provided at the other end of the cutting edge part 200. The end cutting edges 210 are arranged circumferentially around the axis of the cutting edge part 200. The chip flutings 220 are arranged corresponding to the end cutting edges 210, and both opposite ends of the chip flutings 220 in their own extending direction extend to the circumferential side of the cutting edge part 200 respectively. The groove wall of the chip fluting 220 is connected to the corresponding end cutting edge 210.

[0033] Refer to Figures 1 to 3, in the embodiment shown in the figure, the axial direction of the plunge milling cutter is the front-back direction. The rear end of the cutting edge portion 200 is connected to the front end of the tool neck portion 100. Three end cutting edges 210 and three guiding grooves 220 are provided at the front end of the cutting edge portion 200. The three end cutting edges 210 are circumferentially spaced around the axis of the cutting edge portion 200. The three guiding grooves 220 are cross - arranged on the front end face of the cutting edge portion 200, and the groove side wall of each guiding groove 220 is connected to one end cutting edge 210.

[0034] It can be understood that when the plunge milling cutter of this embodiment mills the workpiece, the end cutting edge 210 can cut the workpiece, and the cutting chips generated by the end cutting edge 210 cutting the workpiece can enter the corresponding guiding groove 220. Since the two opposite ends of the guiding groove 220 respectively extend to the circumferential side of the cutting edge portion 200, the cutting chips in the guiding groove 220 can be discharged from the two opposite ends of the guiding groove 220 respectively. Thus, the discharge efficiency of the cutting chips during the operation of the plunge milling cutter of this embodiment is improved, the damage of the cutting chips to the plunge milling cutter of this embodiment is effectively reduced, and the service life of the plunge milling cutter of this embodiment is prolonged.

[0035] It can be understood that when the plunge milling cutter of this embodiment works, it is necessary to introduce coolant to the cutting edge portion 200 of the plunge milling cutter. Since the two opposite ends of the guiding groove 220 respectively extend to the circumferential side of the cutting edge portion 200, the coolant can enter from one end of the guiding groove 220 and flow out from the other end of the guiding groove 220. The coolant can smoothly flow on the front end face of the cutting edge portion 200, thereby improving the cooling effect of the coolant on the end cutting edge 210. At the same time, during the flow of the coolant, the coolant can carry out the cutting chips in the guiding groove 220 to improve the discharge efficiency of the cutting chips from the guiding groove 220.

[0036] When the plunge milling cutter of the present application works, the coolant is introduced from the periphery of the plunge milling cutter. Correspondingly, the cooling effect of the axis part of the cutting edge portion 200 is worse than that of the circumferential side part of the cutting edge portion 200.

[0037] In order to improve the cooling effect of the coolant on the axis part of the plunge milling cutter, in a further embodiment of the present utility model, the guiding groove 220 passes through the axis of the cutting edge portion 200.

[0038] In Figure 3 , three guiding grooves 220 are provided on the cutting edge portion 200, and all three guiding grooves 220 pass through the axis of the cutting edge portion 200. Furthermore, the axis part of the cutting edge portion 200 can be cooled by the coolant flowing through the three guiding grooves 220, thereby improving the cooling effect of the axis part of the cutting edge portion 200.

[0039] In some embodiments of the present utility model, along the depth direction of the diversion groove 220, the width dimension of the diversion groove 220 gradually decreases. With such a setting, on the one hand, the cutting chips generated by the end edge 210 cutting the workpiece can more easily enter the diversion groove 220. On the other hand, when the plunge milling cutter in this embodiment finishes cutting, it is convenient for the cutting chips to be discharged from the diversion groove 220, so as to reduce the probability of the cutting chips accumulating in the diversion groove 220.

[0040] Specifically, the depth of the diversion groove 220 is 0.1 mm, and the width of the notch of the diversion groove 220 is 0.15 mm.

[0041] In some embodiments of the present utility model, referring to Figure 4 , the rake face of the end edge 210 has an end-edge rake angle 211, the flank face of the end edge 210 has an end-edge clearance angle 212, the end-edge rake angle 211 is 5° ± 1°, and the end-edge clearance angle 212 is 4° ± 1°.

[0042] It can be understood that the smaller end-edge rake angle 211 and end-edge clearance angle 212 can improve the strength and stiffness of the cutting edge portion 200 of the plunge milling cutter in this embodiment, so that the size of the cutting edge portion 200 of the plunge milling cutter in this embodiment in the axial direction can be made smaller.

[0043] In some embodiments of the present utility model, the plunge milling cutter is a T-shaped plunge milling cutter, and a plurality of peripheral cutting edges 230 are provided on the circumferential side of the cutting edge portion 200, and the peripheral cutting edges 230 are arranged corresponding to the end edges 210.

[0044] In Figure 3 , three peripheral cutting edges 230 are provided on the circumferential side of the cutting edge portion 200, and the three peripheral cutting edges 230 are arranged corresponding to the three end edges 210 on the front end face of the cutting edge portion 200.

[0045] It can be understood that by providing the peripheral cutting edges 230 on the circumferential side of the cutting edge portion 200, the plunge milling cutter in this embodiment can not only plunge mill the workpiece through the end edges 210, but also side mill the workpiece through the peripheral cutting edges 230. The function of the cutter in this embodiment is more diversified, and it can achieve multiple functions with one tool, greatly improving the processing efficiency in actual processing.

[0046] In a specific embodiment of the present utility model, referring to Figure 5 and Figure 6 , the flank face of the peripheral cutting edge 230 is provided with a first peripheral-edge clearance angle 231 and a second peripheral-edge clearance angle 232, the rake face of the peripheral cutting edge 230 is provided with a peripheral-edge rake angle 233, the first peripheral-edge clearance angle 231 is 12° ± 2°, the second peripheral-edge clearance angle 232 is 25° ± 4°, and the peripheral-edge rake angle 233 is 2° ± 1°.

[0047] It can be understood that by setting the peripheral-edge rake angle 233 to 2° ± 1°, the cutting edge of the peripheral cutting edge 230 can have better wear resistance and chipping resistance.

[0048] However, the peripheral edge rake angle 233 is set to 2° ± 1°, making the cutting edge of the peripheral edge 230 belong to a relatively blunt type, which is not conducive to the dissipation of cutting heat at the cutting edge of the peripheral edge 230. When the peripheral edge 230 cuts the workpiece, a large amount of cutting heat is likely to accumulate at the cutting edge of the peripheral edge 230, thereby affecting the service life of the peripheral edge 230.

[0049] In this embodiment, the peripheral edge 230 adopts a double-plane flank angle structure with both a first peripheral edge flank angle 231 and a second peripheral edge flank angle 232. The setting of the double-plane flank angle structure enables the peripheral edge 230 of the plunge milling cutter in this embodiment to have better sharpness, so as to balance the lack of sharpness of the cutting edge of the peripheral edge 230 due to the relatively small angle of the peripheral edge rake angle 233, making it easier for the peripheral edge 230 to cut the workpiece; at the same time, the setting of the double-plane flank angle structure can reduce the generation of cutting heat when the peripheral edge 230 cuts the workpiece, so as to reduce the accumulation of heat at the cutting edge of the peripheral edge 230 and extend the service life of the peripheral edge 230.

[0050] It can be understood that in this embodiment, by setting the first peripheral edge flank angle 231 to 12° ± 2°, the second peripheral edge flank angle 232 to 25° ± 4°, and the peripheral edge rake angle 233 to 2° ± 1°, it is possible to make the cutting edge of the peripheral edge 230 have good wear resistance and chipping resistance while having better sharpness, enabling the plunge milling cutter in this embodiment to have better machining performance and a longer service life at the same time.

[0051] It should be noted that when the plunge milling cutter of the present application is a T-shaped plunge milling cutter, the thickness of the cutting edge portion 200 in the axial direction is small, making the overall stiffness and strength of the cutting edge portion 200 low.

[0052] In order to improve the overall stiffness and strength of the cutting edge portion 200, in a further embodiment of the present invention, referring to Figure 3 , a plurality of protrusions 240 corresponding to the end cutting edges 210 are provided at the end face edge of the cutting edge portion 200, and a part of the end cutting edges 210 extends onto the protrusions 240.

[0053] In Figure 3 , three protrusions 240 and three end cutting edges 210 are provided on the cutting edge portion 200. The three end cutting edges 210 and the three protrusions 240 correspond one by one, and a part of the end cutting edges 210 extends onto the corresponding protrusions 240.

[0054] It can be understood that by providing the protrusions 240 on the cutting edge portion 200, the protrusions 240 can improve the stiffness and rigidity of the periphery of the cutting edge portion 200, enabling the peripheral edge 230 to smoothly perform side milling on the workpiece.

[0055] Specifically, in the circumferential direction of the blade portion 200 , the thickness of the blade portion 200 at the protrusion 240 is 0.5 mm.

[0056] In order to improve the overall rigidity and strength of the blade portion 200 , in a further embodiment of the present invention, the helix angle of the peripheral edge 230 is 25°, and a chip removal groove (not shown in the figure) is formed between adjacent peripheral edges 230 .

[0057] It can be understood that by setting a smaller helix angle, the blade portion 200 can have higher strength and rigidity; at the same time, the setting of a smaller helix angle can shorten the length of the chip groove, so that when the plunge milling cutter of this embodiment performs axial plunge milling, the chips can be discharged along the chip groove more quickly. During the discharge process, the chips will take away the heat of the blade portion 200, thereby slowing down the accumulation of heat in the blade portion 200, so as to extend the service life of the plunge milling cutter of this embodiment.

[0058] In some embodiments of the present invention, reference Figure 5 The diameter of the blade portion 200 is D, and the core diameter of the peripheral blade 230 is 0.5D.

[0059] It can be understood that the smaller core diameter of the peripheral cutting edge 230 enables the plunge milling cutter of this embodiment to have a larger chip removal space when performing plunge milling.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A plunge milling cutter, characterized in that: include: knife neck; A blade portion, one end of which is connected to the blade neck portion, and the other end of which is provided with a plurality of end blades and a plurality of guide grooves, wherein the end blades are circumferentially arranged around the axis of the blade portion, the guide grooves are arranged corresponding to the end blades, and the guide grooves extend to the circumferential side of the blade portion at opposite ends of their own extension direction, and the groove walls of the guide grooves are connected to the corresponding end blades.

2. A plunge milling cutter according to claim 1, characterized in that: The guide groove passes through the axis of the blade portion.

3. A plunge milling cutter according to claim 1, characterized in that: Along the depth direction of the guide groove, the width dimension of the guide groove gradually decreases.

4. A plunge milling cutter according to claim 3, characterized in that: The depth of the guide groove is 0.1 mm, and the width of the guide groove opening is 0.15 mm.

5. A plunge milling cutter according to claim 1, characterized in that: The front cutting surface of the end edge has an end edge rake angle, and the rear cutting surface of the end edge has an end edge clearance angle. The end edge rake angle is 5°±1°, and the end edge clearance angle is 4°±1°.

6. A plunge milling cutter according to claim 1, characterized in that: The plunge milling cutter is a T-type plunge milling cutter, and a plurality of peripheral cutting edges are arranged on the peripheral side of the cutting edge portion, and the peripheral cutting edges are arranged corresponding to the end cutting edges.

7. A plunge milling cutter according to claim 6, characterized in that: The rear cutting edge of the peripheral blade is provided with a first peripheral blade clearance angle and a second peripheral blade clearance angle, the front cutting edge of the peripheral blade is provided with a peripheral blade rake angle, the first peripheral blade clearance angle is 12°±2°, the second peripheral blade clearance angle is 25°±4°, and the peripheral blade rake angle is 2°±1°.

8. A plunge milling cutter according to claim 6, characterized in that: The edge of the end surface of the blade portion is provided with a plurality of protrusions corresponding to the end blade, and the end blade portion extends onto the protrusions.

9. A plunge milling cutter according to claim 6, characterized in that: The helix angle of the peripheral blade is 25°, and the thickness of the blade portion in the axial direction is 0.5 mm.

10. The plunge milling cutter according to claim 6, characterized in that: The diameter of the blade portion is D, and the core diameter of the peripheral blade is 0.5D.

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