Milling tool

Abstract

The utility model discloses a milling cutter. The milling cutter comprises a cutter bar and an indexable milling blade mounted on the cutter bar, a cooling liquid flow channel is formed in the cutter bar and comprises a main flow channel and a plurality of branch flow channels, and the tail end of the main flow channel communicates with the branch flow channels; the branch flow channel comprises a front cutter face cooling water flow channel and a rear cutter face cooling water flow channel, a water outlet hole of the front cutter face cooling water flow channel faces the front cutter face of the milling blade, and a water outlet hole of the rear cutter face cooling water flow channel faces the rear cutter face of the milling blade; the indexable milling blade comprises a front tool face, a blade bottom face arranged opposite to the front tool face, a rear tool face connected with the front tool face and the blade bottom face, and a mounting hole located in the center of the front tool face. A cutting edge is formed at the intersection of the front tool face and the rear tool face, and the rear tool face is provided with a cooling water channel. The cooling effect of the rear cutter face of the cutter is improved, and then the service life of the cutter is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and more specifically, to a milling tool. Background Technology

[0002] Square shoulder milling cutters are a common type of milling tool, suitable for machining various materials and capable of milling different parts. During milling, the tool generates high temperatures through friction with the workpiece surface. These high temperatures can cause a decrease in the hardness of the tool material, making the cutting edge prone to wear and chipping. This is especially true when milling the sidewalls of cavity parts. In traditional square shoulder milling cutters, the flank face forms a narrow, enclosed space with the workpiece sidewall. In this situation, the coolant sprayed from the tool cannot reach this gap, causing the flank face temperature to rise continuously, ultimately leading to the failure of the flank face before the rake face.

[0003] Invention patent CN117300225B discloses an internally cooled tool holder and a cutting tool, including a tool holder body. The tool holder body has at least three sets of cooling channels and a water channel selection component. The water inlet of each set of cooling channels is located at the end of the tool holder body. The first set of cooling channels is used to cool the front end of the tool holder body and / or the bottom cutting edge of the cutting tool. The second set of cooling channels is used to cool the bottom cutting edge of the cutting tool. The third set of cooling channels is used to cool the side cutting edge of the cutting tool. This solution directly guides the coolant to the bottom and side cutting edges of the cutting tool for cooling. However, when milling the side wall of a cavity part, the coolant cannot enter the gap between the tool's flank face and the workpiece, so the cooling effect of this solution is limited. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a milling tool.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model provides a milling cutter, including a tool holder and an indexable milling insert mounted on the tool holder; the tool holder has at least two mounting slots, and the indexable milling insert is fixedly mounted in the mounting slots; the tool holder body has a coolant flow channel, the coolant flow channel including a main flow channel and multiple branch flow channels, the end of the main flow channel communicating with the multiple branch flow channels; the branch flow channels include a rake face cooling water channel and a flank face cooling water channel, the outlet of the rake face cooling water channel facing the rake face of the milling insert, and the outlet of the flank face cooling water channel facing the flank face of the milling insert; the indexable milling insert includes a rake face, an insert bottom surface opposite to the rake face, a flank face connecting the rake face and the insert bottom surface, and a mounting hole located at the center of the rake face; a cutting edge is formed at the intersection of the rake face and the flank face, and the flank face has a cooling water channel.

[0007] Further, the cooling water channel is recessed by 0.05-3mm.

[0008] Further, the cooling water channel is zigzag-shaped.

[0009] Further, the main flow channel is coaxial with the cutter bar body.

[0010] Further, the bottom surface of the cutting blade is flat.

[0011] Further, the cutting edge comprises a main cutting edge, an angle cutting edge, a finishing edge, and a ramping edge; one end of the angle cutting edge is connected with the finishing edge, and the other end is connected with the main cutting edge; the other end of the finishing edge is connected with the ramping edge, and one end of the ramping edge away from the main cutting edge is inclined upward.

[0012] Further, the relief surface comprises a finishing edge relief surface connected with the finishing edge and a ramping edge relief surface connected with the ramping edge.

[0013] Further, the R angle of the arc shape is 0.1-3.2mm.

[0014] Further, the indexable milling blade is coated with a PVD coating.

[0015] Further, the indexable milling blade is fixed in the mounting groove through locking screws.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a cooling water channel is arranged in the cutter bar, and cutting fluid is guided to the rake face and the relief surface of the milling blade to cool, and the zigzag-shaped cooling water channel is designed on the relief surface, the cooling fluid can stay on the relief surface, when the cutter rotates and works, the cooling water is brought into the gap of the relief surface and the workpiece to cool, and when the cooling water enters the zigzag-shaped cooling water channel, the rotational vortex flow is formed, the cooling effect of the relief surface is further improved, and the service life of the cutter is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is milling cutter structure schematic diagram;

[0019] Figure 2 It is cutter bar structure schematic diagram;

[0020] Figure 3 It is cutter bar internal water channel structure schematic diagram;

[0021] Figure 4 It is indexable milling blade front surface structure schematic diagram;

[0022] Figure 5Fig. 1 is a perspective view of a milling insert;

[0023] Figure 6 Fig. 2 is a top view of the milling insert;

[0024] Figure 7 Fig. 3 is a side view of the milling insert;

[0025] Figure 8 Fig. 4 is a schematic view of a vortex flow of the cooling liquid in the rear face cooling water flow channel.

[0026] Wherein: 1, tool bar; 2, indexable milling insert; 3, mounting groove; 4, threaded hole; 5, front face cooling water flow channel outlet hole; 6, rear face cooling water flow channel outlet hole; 7, main flow channel; 8, front face cooling water flow channel; 9, rear face cooling water flow channel; 10, front face; 11, insert bottom surface; 12, rear face; 13, cooling water channel; 14, cutting edge; 15, mounting hole; 16, corner cutting edge; 161, main cutting edge; 162, finishing edge; 17, ramping edge; 18, finishing edge rear face; 19, ramping edge rear face. DETAILED DESCRIPTION

[0027] To clearly illustrate the technical features of the present scheme, the following through specific implementation, and combining its drawings, the utility model is described in detail. In the following description, a lot of specific details are set forth in order to fully understand the present application, however, the present application can also be implemented in other ways different from the description herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. In addition, in the description of the present application, it is understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be directly contacted by the first and second features, or indirectly contacted by the first and second features through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] Embodiment 1

[0029] Please refer to Figures 1 to 8 , the utility model provides an embodiment:

[0030] A milling cutter includes a tool holder 1 and an indexable milling insert 2 mounted on the tool holder. The tool holder 1 has two mounting slots 3, and the indexable milling insert 2 is fixedly mounted within the mounting slots 3. The tool holder 1 body has a coolant flow channel, including a main flow channel 7 and multiple branch flow channels, with the end of the main flow channel communicating with the multiple branch flow channels. Each branch flow channel includes a rake face cooling water channel 8 and a flank face cooling water channel 9. The rake face cooling water channel outlet 5 faces the rake face of the milling insert, and the flank face cooling water channel outlet 6 faces the flank face of the milling insert. The indexable milling insert includes a rake face 10, a bottom surface 11 opposite to the rake face 10, a flank face 12 connecting the rake face 10 and the bottom surface 11, and a mounting hole 15 located at the center of the rake face. A cutting edge 14 is formed at the intersection of the rake face 10 and the flank face 12, and the flank face has a cooling water channel 13.

[0031] The surface of the blade bottom 11 that contacts the mounting groove 3 is a plane. The blade bottom 11 is placed into the mounting groove 3 with the mounting groove 3 facing downwards, and is fixed in the threaded hole 4 of the tool holder 1 by locking screws, thereby installing and fixing the indexable milling blade 2.

[0032] The cooling water channel 13 has a recessed depth of 3mm and a serrated shape. The cooling water outlet 6 on the back face is located above the cooling water channel 13 and faces it. Figure 8 As shown, the coolant is ejected from the outlet hole 6 of the cooling water channel on the back face and enters the cooling water channel 13. The cooling water channel 13 can store a small amount of cooling water. When the tool rotates, it carries the cooling water into the gap between the back face and the workpiece for cooling. Due to the influence of the serrated shape, the cooling water will change in direction and speed. When it flows through the protruding part of the serration, it will be squeezed and change its flow direction, forming a vortex, which further improves the cooling effect of the back face.

[0033] The cutting edge 14 of the indexable milling insert 2 includes a main cutting edge 161, a corner cutting edge 16, a finishing edge 162, and a ramp cutting edge 17; one end of the corner cutting edge 16 is connected to the finishing edge 162, and the other end is connected to the main cutting edge 161; the other end of the finishing edge 162 is connected to the ramp cutting edge 17, and the end of the ramp cutting edge 17 away from the main cutting edge 161 is inclined upward; the flank face 12 includes a finishing edge flank face 18 connected to the finishing edge 162 and a ramp cutting edge flank face 19 connected to the ramp cutting edge 17; the ramp cutting edge flank face 19 cooperates with the mounting groove 3 to play a positioning role.

[0034] The main flow channel 7 is coaxial with the cutter bar body, when the cutter is cutting, the cooling water enters the main flow channel 7, and flows into the rake face cooling water flow channel 8 and the relief face cooling water flow channel 9; the rake face cooling water flow channel water outlet hole 5 is towards the rake face 10 of the milling insert, and the rake face 10 of the insert is cooled; the relief face cooling water flow channel water outlet hole 6 is towards the relief face 12 of the milling insert, and the relief face 12 of the insert is cooled. The cutter can simultaneously cool the rake face 10 and the relief face 12 of the insert, improves the cooling effect of the insert, and prolongs the service life of the cutter.

[0035] Embodiment 2

[0036] Please refer to Figures 1 to 8 , the utility model provides a kind of embodiment:

[0037] A milling cutter, comprising cutter bar 1 and the indexable milling insert 2 installed on cutter bar;Two installation grooves 3 are provided on the cutter bar 1, and the indexable milling insert 2 is fixedly installed in the installation groove 3;Cooling liquid flow channel is provided in the cutter bar 1 body, and the cooling liquid flow channel comprises main flow channel 7 and multiple branch flow channels, and the tail end of the main flow channel is communicated with multiple branch flow channels;The branch flow channel comprises rake face cooling water flow channel 8 and relief face cooling water flow channel 9, and the rake face cooling water flow channel water outlet hole 5 is towards the rake face of the milling insert, and the relief face cooling water flow channel water outlet hole 6 is towards the relief face of the milling insert;The indexable milling insert comprises rake face 10, insert bottom surface 11 oppositely arranged with rake face 10, relief face 12 connecting rake face 10 and insert bottom surface 11, and mounting hole 15 located in the center of rake face;The intersection of the rake face 10 and the relief face 12 forms cutting edge 14, and the relief face is provided with cooling water channel 13.

[0038] The surface of the insert bottom surface 11 in contact with the installation groove 3 is a plane, and the insert bottom surface 11 is placed downward into the installation groove 3 and fixed in the threaded hole 4 of the cutter bar 1 by locking screw, so as to install and fix the indexable milling insert 2.

[0039] The depth of the cooling water channel 13 is 0.05mm, and the shape of the cooling water channel 13 is sawtooth-shaped, and the relief face cooling water flow channel water outlet hole 6 is located above the cooling water channel 13 and is towards the cooling water channel 13. Figure 8 As shown in the figure, the cooling liquid is shot into the cooling water channel 13 through the relief face cooling water flow channel water outlet hole 6, and the cooling water channel 13 can store a small amount of cooling water, which is brought into the gap between the relief face and the workpiece during the rotation of the cutter to cool, and the direction and speed of the cooling water change due to the influence of the sawtooth shape, and the cooling water is extruded and changes the flow direction when flowing through the convex part of the sawtooth, forming a vortex, which further improves the cooling effect of the relief face.

[0040] The cutting edge 14 of the indexable milling insert 2 comprises a main cutting edge 161, a corner cutting edge 16, a lightening edge 162, a ramping edge 17; the corner cutting edge 16 is connected with the lightening edge 162 at one end and connected with the main cutting edge 161 at the other end; the other end of the lightening edge 162 is connected with the ramping edge 17, and the end of the ramping edge 17 away from the main cutting edge 161 is arranged upwardly inclined; the relief surface 12 comprises a lightening edge relief surface 18 connected with the lightening edge 162 and a ramping edge relief surface 19 connected with the ramping edge 17; the ramping edge relief surface 19 cooperates with the mounting groove 3 to play a positioning role.

[0041] Further, the surface of the indexable milling insert 2 is also coated with a wear-resistant coating, which can significantly improve the surface hardness of the insert, thereby enhancing its ability to resist wear and further improving the overall service life of the tool.

[0042] The main flow channel 7 is coaxial with the tool bar body, when the tool is cutting, the cooling water enters the main flow channel 7 and flows into the rake face cooling water flow channel 8 and the relief surface cooling water flow channel 9; the rake face cooling water flow channel water outlet hole 5 is directed towards the rake face 10 of the milling insert to cool the rake face 10 of the insert; the relief surface cooling water flow channel water outlet hole 6 is directed towards the relief surface 12 of the milling insert to cool the relief surface 12 of the insert. The tool can simultaneously cool the rake face 10 and the relief surface 12 of the insert, improve the cooling effect of the insert, and prolong the service life of the tool.

[0043] Embodiment 3

[0044] Please refer to Figures 1 to 8 , the utility model provides a kind of embodiment:

[0045] A milling tool, comprising a tool bar 1 and an indexable milling insert 2 mounted on the tool bar; the tool bar 1 is provided with two mounting grooves 3, and the indexable milling insert 2 is fixedly mounted in the mounting groove 3; the tool bar 1 body is provided with a cooling liquid flow channel, and the cooling liquid flow channel comprises a main flow channel 7 and a plurality of branch flow channels; the end of the main flow channel is communicated with the plurality of branch flow channels; the branch flow channels comprise a rake face cooling water flow channel 8 and a relief surface cooling water flow channel 9; the rake face cooling water flow channel water outlet hole 5 is directed towards the rake face of the milling insert, and the relief surface cooling water flow channel water outlet hole 6 is directed towards the relief surface of the milling insert; the indexable milling insert comprises a rake face 10, an insert bottom surface 11 arranged opposite to the rake face 10, a relief surface 12 connecting the rake face 10 and the insert bottom surface 11, and a mounting hole 15 located at the center of the rake face; the rake face 10 and the relief surface 12 intersect to form a cutting edge 14, and the relief surface is provided with a cooling water channel 13.

[0046] The bottom surface 11 of the blade is in contact with the mounting groove 3, and the bottom surface 11 of the blade is placed downward into the mounting groove 3 and fixed in the threaded hole 4 of the cutter bar 1 by locking screws, so as to install and fix the indexable milling blade 2.

[0047] The cooling water channel 13 has a depth of 1mm, and the shape of the cooling water channel 13 is sawtooth-shaped. Figure 8 As shown in the figure, the cooling liquid is sprayed into the cooling water channel 13 through the rear face cooling water flow channel outlet hole 6, and the cooling water channel 13 can store a small amount of cooling water, which is brought into the gap between the rear face and the workpiece during the rotation of the cutter to cool, and the direction and speed of the cooling water change due to the sawtooth-shaped effect, and the cooling water is extruded and changes the flow direction when passing through the convex part of the sawtooth, forming a vortex, which further improves the cooling effect of the rear face.

[0048] The cutting edge 14 of the indexable milling blade 2 includes a main cutting edge 161, an angle cutting edge 16, a finishing edge 162 and a ramping edge 17, one end of the angle cutting edge 16 is connected with the finishing edge 162, the other end of the angle cutting edge 16 is connected with the main cutting edge 161, the other end of the finishing edge 162 is connected with the ramping edge 17, and one end of the ramping edge 17 away from the main cutting edge 161 is inclined upward, the rear face 12 includes a finishing edge rear face 18 connected with the finishing edge 162 and a ramping edge rear face 19 connected with the ramping edge 17, and the ramping edge rear face 19 cooperates with the mounting groove 3 to play a positioning role.

[0049] Further, the R angle of the circular arc is 0.1mm, which is suitable for high-precision machining and can obtain a good surface finish after machining.

[0050] The main flow channel 7 is coaxial with the cutter bar body, the cooling water enters the main flow channel 7 and flows into the rake face cooling water flow channel 8 and the relief face cooling water flow channel 9 during the cutting operation of the cutter, the rake face cooling water flow channel outlet hole 5 is directed to the rake face 10 of the milling blade to cool the rake face 10 of the blade, and the relief face cooling water flow channel outlet hole 6 is directed to the relief face 12 of the milling blade to cool the relief face 12 of the blade, so that the cutter can cool the rake face 10 and the relief face 12 of the blade at the same time, improve the cooling effect of the blade and prolong the service life of the cutter.

[0051] Example 4

[0052] Please refer to Figures 1 to 8 The difference between the embodiment and the embodiment 3 is that the R angle of the circular arc is 3.2mm, which is suitable for rough machining, and the milling blade with the R angle can withstand a large cutting force during the cutting process, so that the machining process can be smoothly carried out.

[0053] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the basic characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalency of the claims' elements are therefore intended to be embraced therein, any reference signs in the claims not being regarded as limiting the claims concerned.

Claims

1. A milling tool, characterized by: The application relates to a cutter bar and a indexable milling insert fixed on the cutter bar; at least two installation grooves are arranged on the cutter bar, and the indexable milling insert is fixedly installed in the installation grooves; a cooling liquid flow channel is arranged in the cutter bar, the cooling liquid flow channel comprises a main flow channel and a plurality of branch flow channels, and the tail end of the main flow channel is communicated with the plurality of branch flow channels; the branch flow channels comprise a rake face cooling water flow channel and a relief face cooling water flow channel, the water outlet hole of the rake face cooling water flow channel faces the rake face of the milling insert, and the water outlet hole of the relief face cooling water flow channel faces the relief face of the milling insert. The indexable milling insert comprises a rake face, a blade bottom surface arranged opposite to the rake face, a relief face connecting the rake face and the blade bottom surface, and an installation hole located in the center of the rake face; the rake face and the relief face form a cutting edge; and the relief face is provided with a cooling water channel.

2. A milling tool according to claim 1, characterized in that: The depth of the cooling water channel is 0.05-3 mm.

3. A milling tool according to claim 1, characterized in that: The shape of the cooling water channel is sawtooth-shaped.

4. A milling tool according to claim 1, characterized in that: The main flow channel is coaxial with the cutter bar.

5. A milling tool according to claim 1, characterized in that: The surface of the blade bottom surface contacting with the installation groove is a plane.

6. A milling tool according to claim 1, characterized in that: The cutting edge comprises a main cutting edge, an angle cutting edge, a finishing edge and a slope walking edge; one end of the angle cutting edge is connected with the finishing edge, and the other end of the angle cutting edge is connected with the main cutting edge; the other end of the finishing edge is connected with the slope walking edge; and the end of the slope walking edge away from the main cutting edge is arranged in an inclined upward mode.

7. A milling tool according to claim 6, characterized in that: The relief face comprises a finishing edge relief face connected with the finishing edge and a slope walking edge relief face connected with the slope walking edge.

8. A milling tool according to claim 1, characterized in that: The surface of the indexable milling insert is further coated with a wear-resistant coating.

9. A milling tool according to claim 1, characterized in that: The indexable milling insert is fixed in the installation groove through locking screws.

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