Rough and fine integrated combined cutter

Abstract

The utility model belongs to the technical field of milling machining, and provides a rough and fine integrated combined cutter which comprises a cutter head body, a first end and a second end, the first end and the second end are opposite, and the first end is used for being connected with a machine tool; a plurality of vertical mounting grooves and a plurality of horizontal mounting grooves are uniformly formed in the second end in the circumferential direction, and the vertical mounting grooves and the horizontal mounting grooves are uniformly distributed at intervals; the plurality of blades are mounted in the plurality of vertical mounting grooves and / or the plurality of horizontal mounting grooves in a one-to-one correspondence manner through locking pieces; wherein the number of available cutting edges of each blade is eight. The multiple vertical mounting grooves and the multiple horizontal mounting grooves which are distributed at intervals are designed in the cutter head body, the mounting positions of the vertical mounting grooves and the mounting positions of the horizontal mounting grooves are designed to be consistent, blades mounted in the mounting grooves can be universally used, a user does not need to adjust the cutter head during rough and fine integrated machining, the assembly efficiency is high, and the machining precision is high. And the processing efficiency is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of milling processing, and in particular to a roughing and finishing combined tool. Background Art

[0002] At present, alloy tools are usually used for rough milling of cast iron workpieces, which have the disadvantages of low efficiency and short life. In fine milling, similar super-hard milling tools and blade combinations require users to adjust the combination on the tool adjuster to meet the processing requirements. The installation is complicated, resulting in low production and processing efficiency. Moreover, in fine machining, the above-mentioned tools have a small number of usable edges and a low cost-effectiveness. Utility Model Content

[0003] The embodiment of the present application provides a roughing and finishing combined tool, which does not require user adjustment during roughing and finishing processing, and not only has high assembly efficiency but also effectively improves processing efficiency.

[0004] The present application provides a roughing and finishing combined tool, comprising:

[0005] The cutter head body comprises a first end and a second end opposite to each other, wherein the first end is used to be connected to a machine tool; the second end is evenly provided with a plurality of vertical mounting grooves and a plurality of horizontal mounting grooves along the circumferential direction, and the plurality of vertical mounting grooves and the plurality of horizontal mounting grooves are evenly spaced and distributed; wherein the plurality of vertical mounting grooves are evenly distributed on the circumferential surface of the second end, and the plurality of horizontal mounting grooves are evenly distributed on the end surface of the second end;

[0006] A plurality of blades are mounted in the plurality of vertical mounting slots and / or the plurality of horizontal mounting slots in a one-to-one correspondence via locking members; wherein each of the blades has eight usable cutting edges.

[0007] In a feasible implementation, the blade is a rectangular parallelepiped structure, comprising a body and four superhard cutting heads. Notches are constructed at the four long sides of the blade, the notches are suitable for fixing the superhard cutting heads, and each superhard cutting head has two usable cutting edges.

[0008] In a feasible implementation, the blade is a rectangular parallelepiped structure having four main cutting edges and four secondary cutting edges, and adjacent main cutting edges and secondary cutting edges can form two cutting edge surfaces on the rectangular parallelepiped structure; wherein each cutting edge surface has four available cutting edges.

[0009] In a feasible implementation, an arc-shaped transition edge is connected between adjacent main cutting edges and adjacent secondary cutting edges.

[0010] In a feasible implementation, the blade surface is configured with a polished cambered surface.

[0011] In a feasible implementation, the polished curved surface is formed with a curved cutting edge.

[0012] In a feasible implementation, a linear transition edge and an arcuate transition edge are connected between adjacent main cutting edges and adjacent secondary cutting edges.

[0013] In a feasible implementation, from the main cutting edge to the secondary cutting edge, two sections of the linear transition edge, one section of the arcuate transition edge and two sections of the linear transition edge are included in sequence.

[0014] In a feasible implementation, it also includes a spray mechanism, which is fixedly connected to the cutter disc body and can form a plurality of water outlets at the second end of the cutter disc body.

[0015] In a feasible implementation, the spray mechanism includes a cover plate, the cover plate and the cutter disc body form a cavity, and the cavity is used to communicate with the water inlet channel;

[0016] The cover plate is configured with a plurality of water outlet channels along the circumference of the cutter disc body, and the water outlet channels and the second end of the cutter disc body constitute the water outlet.

[0017] The roughing and finishing integrated combined tool provided in the embodiment of the present application is designed with a plurality of vertical mounting grooves and horizontal mounting grooves arranged at intervals on the cutter body, and the mounting positions of the vertical mounting grooves and the horizontal mounting grooves are designed to be consistent, so that the blades installed in the mounting grooves can be universal. This arrangement does not require the user to adjust when performing roughing and finishing integrated processing, which not only has high assembly efficiency, but also effectively improves processing efficiency. In addition, the use of a universal blade can interchange a blade in the vertical mounting groove and the horizontal mounting groove, so that a cutting edge of the blade can be installed and used twice, thereby improving the cost-effectiveness of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a roughing and finishing combined tool provided according to an embodiment of the present application;

[0020] Figure 2 It is a structural schematic diagram of a roughing and finishing integrated tool (only the blade is installed in the horizontal installation groove) provided according to an embodiment of the present application;

[0021] Figure 3 It is a structural schematic diagram of a roughing and finishing integrated tool (only the blade is installed in the vertical mounting groove) provided according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of the structure of a blade provided according to an embodiment of the present application;

[0023] Figure 5 is a schematic side view of the structure of a blade provided according to an embodiment of the present application;

[0024] Figure 6 is a schematic structural diagram of a blade provided according to another embodiment of the present application;

[0025] Figure 7 is a schematic side view of a blade provided according to another embodiment of the present application;

[0026] Figure 8 is a schematic side view of a blade provided according to another embodiment of the present application;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of a roughing and finishing combined tool provided according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 100, cutter head body; 101, first end; 102, second end; 103, vertical mounting slot; 104, horizontal mounting slot;

[0030] 200, blade; 210, body; 220, superhard cutter head; 201, main cutting edge; 202, secondary cutting edge; 203, arc transition edge; 204, blade surface; 205, polished arc surface; 206, linear transition edge;

[0031] 300, locking piece;

[0032] 400, spray mechanism; 401, water outlet; 402, cover plate; 4021, water outlet channel. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] The existing alloy cutting tools have the disadvantages of low efficiency and short life in rough machining. In addition, in fine milling, the blade combination needs to be adjusted by the user on the tool adjustment instrument to meet the machining requirements. The user has no ability to adjust the equipment, so additional manpower needs to be dispatched to conduct on-site debugging according to user needs, which wastes manpower and material resources and reduces machining efficiency. In addition, the current alloy cutting tools have problems with overall economy and short rough machining life, and cannot solve the path appearance problem at the corner of the workpiece well during the machining process, and have a low cost performance.

[0039] Figure 1 It is a structural schematic diagram of a roughing and finishing combined tool provided according to an embodiment of the present application; Figure 2 It is a structural schematic diagram of a roughing and finishing integrated tool (only the blade is installed in the horizontal installation groove) provided according to an embodiment of the present application; Figure 3 It is a structural schematic diagram of a roughing and finishing combined tool (only the blade is installed in the vertical mounting groove) provided according to an embodiment of the present application.

[0040] Based on the above problems, refer to Figure 1-Figure 3 As shown, an embodiment of the present application provides a roughing and finishing combined tool, which may include a cutter disc body 100 and a plurality of blades 200 .

[0041] The cutter disc body 100 includes a first end 101 and a second end 102 relative to each other, the first end 101 is used to be connected to the machine tool; the second end 102 is evenly provided with a plurality of vertical mounting grooves 103 and a plurality of horizontal mounting grooves 104 along the circumferential direction, and the plurality of vertical mounting grooves 103 and the plurality of horizontal mounting grooves 104 are evenly spaced; wherein, the plurality of vertical mounting grooves 103 are evenly distributed on the circumferential surface of the second end 102, and the plurality of horizontal mounting grooves 104 are evenly distributed on the end surface of the second end 102; a plurality of blades 200 are installed in the plurality of vertical mounting grooves 103 and / or the plurality of horizontal mounting grooves 104 in a one-to-one correspondence through locking members 300; wherein, each blade 200 has eight available cutting edges.

[0042] It is understandable that the combined tool can be used as a face milling cutter and can perform vertical and horizontal processing on the workpiece. The specific setting can be based on actual needs and is not limited here.

[0043] In order to realize the integrated rough machining and fine machining, a plurality of vertical mounting grooves 103 and horizontal mounting grooves 104 can be provided at the second end 102 of the cutter head body 100, that is, the end away from the first end 101, and the plurality of vertical mounting grooves 103 and the plurality of horizontal mounting grooves 104 are evenly spaced around the axial direction of the cutter head body 100. Specifically, the plurality of vertical mounting grooves 103 are evenly distributed on the circumferential surface of the second end 102, that is, the plurality of vertical mounting grooves 103 are formed on the outer side wall of the cutter head body 100; the plurality of horizontal mounting grooves 104 are evenly distributed on the end surface of the second end 102, that is, the plurality of horizontal mounting grooves 104 are formed on the end surface of the cutter head body 100 away from the machine tool. In one example, the cutter head body 100 can have ten vertical mounting grooves 103 and ten horizontal mounting grooves 104. Of course, the number of the vertical mounting grooves 103 and the horizontal mounting grooves 104 can be set according to the actual processing requirements and the size of the cutter head body 100, and is not limited here.

[0044] In addition, the vertical installation slots 103 and the horizontal installation slots 104 are arranged at intervals to ensure the stability of operation when the disk is fully loaded with blades 200 without causing mutual interference.

[0045] In one example, the blade 200 is a rectangular parallelepiped structure, and the blade 200 includes a body 210 and four superhard blade heads 220. Notches are constructed at the four long sides of the blade 200, and the notches are suitable for fixing the superhard blade heads 220. Each superhard blade head 220 has two available cutting edges. Specifically, the body 210 of the blade 200 can be made of cemented carbide, and notches are set at the four long sides of the blade 200. The notches are used to fix the superhard blade heads 220. The superhard blade heads 220 can be set as a rectangular parallelepiped structure or a quasi-rectangular parallelepiped structure (for example, the exposed edges and corners can be chamfered). The superhard blade heads 220 are adapted to be installed at the notches, so that the overall appearance of the blade 200 is a rectangular parallelepiped, and it will not affect the installation of the blade 200 to the vertical mounting slot 103 or the horizontal mounting slot 104.

[0046] In addition, the superhard tool head 220 in this example is a superhard tool, and its material can be PCBN (Polycrystalline Cubic Boron Nitride) or PCD (Polycrystalline diamond). Of course, it can also be made of other high-strength materials without limitation.

[0047] It should be noted that the superhard cutter head 220 can be fixed to the body 210 by welding or other methods to increase the connection stability between the superhard cutter head 220 and the body 210 without affecting the milling of the combined tool.

[0048] The blade 200 provided in this example is versatile and can be installed in both the vertical mounting slot 103 and the horizontal mounting slot 104. After the blade 200 is installed in the mounting slot, its axial runout can easily reach within 0.01 mm, thereby satisfying the use of users without pre-adjustment equipment, and can ensure that each blade 200 cuts evenly, increase its life, and thus reduce costs. For example, in the case of rough and fine integrated processing, the blade 200 can be fully loaded in the vertical mounting slot 103 and the horizontal mounting slot 104; when fine processing is performed, the blade 200 can be selected to be installed only in the horizontal mounting slot 104. Of course, the above installation method can be set according to the actual processing situation, and is not limited here. For example, in fine processing, the blade 200 can also be installed in both the vertical mounting slot 103 and the horizontal mounting slot 104.

[0049] In order to satisfy the milling function of the blade 200 installed in the vertical installation slot 103 and the horizontal installation slot 104, the blade 200 in this example adopts a multi-head design, so that one cutting edge of the blade 200 can be installed and used twice, thereby improving the cost performance of the blade 200. The blade 200 in this example can be designed as a structure with four cutting edges, so that there are eight available cutting edges.

[0050] In the embodiment of the present application, a plurality of vertical mounting grooves 103 and horizontal mounting grooves 104 arranged at intervals are designed on the cutter body 100, and the mounting positions of the vertical mounting grooves 103 and the horizontal mounting grooves 104 are designed to be consistent, so that the blades 200 installed in the mounting grooves can be universal. This arrangement does not require the user to adjust when performing rough and fine integrated processing, which not only has high assembly efficiency, but also effectively improves processing efficiency. In addition, the use of a universal blade 200 can interchange a blade 200 in the vertical mounting groove 103 and the horizontal mounting groove 104, so that a cutting edge of the blade 200 can be installed and used twice, thereby improving the cost-effectiveness of the use of the blade 200.

[0051] Next, we will refer to Figure 1-Figure 9 The structure of the roughing and finishing combined tool in the embodiment of the present application is described in detail.

[0052] Figure 4 is a schematic structural diagram of a blade 200 provided according to an embodiment of the present application; Figure 5 It is a schematic side view of the structure of a blade 200 provided according to an embodiment of the present application.

[0053] like Figure 4 and Figure 5As shown, in some embodiments, the blade 200 has four main cutting edges 201 and four secondary cutting edges 202, and adjacent main cutting edges 201 and secondary cutting edges 202 can form two cutting edges 204 on a rectangular parallelepiped structure; wherein each cutting edge 204 has four available cutting edges.

[0054] It can be understood that mounting holes are provided on the opposite end faces of the blade 200 of the rectangular structure, so that the blade 200 can be fixed on the blade disc body 100 by passing the locking member 300 through the mounting hole. In this example, the locking member 300 can be a fastening screw, but there is no specific limitation. The long side adjacent to the mounting hole is defined as the main cutting edge 201, and the short side parallel to the axial direction of the mounting hole is defined as the secondary cutting edge 202. Therefore, a blade 200 has four main cutting edges 201 and four secondary cutting edges 202. And the adjacent main cutting edges 201 and secondary cutting edges 202 can form two cutting edges 204 on the blade 200, and each cutting edge 204 has four available cutting edges.

[0055] More specifically, each blade surface 204 has two cutting edges that can be used for rough cutting in the vertical mounting groove 103, and the blade surface 204 also has two cutting edges that can be used for fine finishing in the horizontal mounting groove 104, and they are different from the cutting edges for rough cutting, thereby maximizing the use of the available cutting edges of the blade surface 204 and improving the cost-effectiveness of the blade 200.

[0056] It should be noted that in this example, the mounting hole of the blade 200 in the vertical mounting slot 103 is parallel to the radial direction of the cutter disc body 100 , and the mounting hole of the blade 200 in the horizontal mounting slot 104 is parallel to the axial direction of the cutter disc body 100 .

[0057] In addition, the main cutting edge 201 and the secondary cutting edge 202 on the insert 200 need to be defined according to their installation positions, and do not indicate an absolute cutting edge.

[0058] like Figure 5 As shown, in some embodiments, an arc-shaped transition edge 203 is connected between adjacent main cutting edges 201 and secondary cutting edges 202 .

[0059] Specifically, the cutting edge formed between the adjacent main cutting edge 201 and the secondary cutting edge 202 is configured to be arc-shaped. This configuration can increase the strength of the connection between the two, thereby improving the durability of the blade 200 and reducing the surface roughness of the processed workpiece.

[0060] Figure 6 is a schematic structural diagram of a blade 200 provided according to another embodiment of the present application; Figure 7 It is a schematic side view of the structure of a blade 200 provided according to another embodiment of the present application.

[0061] like Figure 6 and Figure 7 As shown, in some embodiments, the blade surface 204 is configured with a polished curved surface 205 .

[0062] More specifically, in this example, under the premise that there is an arc-shaped transition edge 203 between the adjacent main cutting edge 201 and the secondary cutting edge 202, a polished arc surface 205 is constructed on the blade surface 204. The polished arc surface 205 can be expressed by grinding the arc-shaped transition edge 203 on the blade surface 204 and the corresponding main cutting edge 201 into a smooth polished arc surface 205. In one example, the polished arc surface 205 is formed with an arc-shaped cutting edge. That is, the polished arc surface 205 can form the main cutting edge 201 into an arc-shaped cutting edge. This arrangement can assist in polishing the surface of the workpiece, especially when the blade 200 is installed in the vertical mounting groove 103 for fine machining, thereby maintaining the path appearance of the workpiece at the corner.

[0063] Figure 8 It is a schematic side view of the structure of a blade 200 provided according to another embodiment of the present application.

[0064] like Figure 8 As shown, in some embodiments, a linear transition edge 206 and an arcuate transition edge 203 are connected between adjacent main cutting edges 201 and secondary cutting edges 202 .

[0065] Specifically, in this example, the tip formed between the adjacent main cutting edge 201 and the secondary cutting edge 202 is partially set as a linear transition edge 206, and partially set as an arc transition edge 203. In one example, from the main cutting edge 201 to the secondary cutting edge 202, two sections of linear transition edges 206, one section of arc transition edge 203 and two sections of linear transition edges 206 are sequentially included. This setting can improve the strength of the connection between the two, improve the durability of the blade 200, and reduce the surface roughness of the workpiece, and can also make the blade 200 cut the workpiece surface more sharply, thereby helping to improve the processing efficiency of the workpiece.

[0066] The above-mentioned various types of blades 200 are all suitable for the combined tool of this example. The blade 200 is ground by an automated peripheral grinder, which can easily control the blade 200 to be at the micron level. In addition, the various designs of the cutting edge of the blade 200 can meet different processing requirements.

[0067] Fig. 9 It is a schematic diagram of the cross-sectional structure of a roughing and finishing combined tool provided according to an embodiment of the present application.

[0068] like Fig. 9As shown, in some embodiments, a spray mechanism 400 is further included. The spray mechanism 400 is fixedly connected to the cutter head body 100 and can form a plurality of water outlets 401 at the second end 102 of the cutter head body 100 .

[0069] It can be understood that the blade 200 is roughly located at the edge of the second end 102 of the cutter disc body 100, and the cutter disc body 100 can be hollow to facilitate the installation of the spray mechanism 400 in the cutter disc body 100, and the spray mechanism 400 can form a plurality of water outlets 401 between the cutter disc body 100, and the plurality of water outlets 401 are oriented toward the edge of the second end 102 of the cutter disc body 100, so as to timely and effectively cool the blade 200 during the processing.

[0070] In some embodiments, the spray mechanism 400 includes a cover plate 402, which forms a cavity with the cutter disc body 100, and the cavity is used to communicate with the water inlet channel; the cover plate 402 is constructed with multiple water outlet channels 4021 along the circumference of the cutter disc body 100, and the water outlet channels 4021 and the second end 102 of the cutter disc body 100 constitute a water outlet 401.

[0071] Specifically, the cover plate 402 can be set as a circular cover plate 402, and a plurality of water outlet channels 4021 are configured on one side of the cover plate 402 facing the cavity, and the plurality of water outlet channels 4021 are evenly spaced along the axial circumference of the cutter head body 100, which mainly divides the water flowing into the cavity from the water inlet channel to flow out to the second end 102 of the cutter head body 100. The water outlet channel 4021 can be set as a groove, which is convenient for processing and manufacturing and can save costs. The groove can abut against the end surface of the second end 102 of the cutter head body 100 to form the water outlet 401, and the shape of the water outlet channel 4021 and the shape of the cutter head body 100 opposite to the water outlet channel 4021 can be reasonably arranged, so that the water flows as much as possible toward the blade 200 set at the edge of the second end 102, so as to effectively realize the cooling of the blade 200.

[0072] Finally, it should be noted that the above implementation modes are only used to illustrate the present application, rather than to limit the present application. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Claims

1. A rough and fine integrated tool, characterized in that: include: The cutter head body comprises a first end and a second end opposite to each other, wherein the first end is used to be connected to a machine tool; the second end is evenly provided with a plurality of vertical mounting grooves and a plurality of horizontal mounting grooves along the circumferential direction, and the plurality of vertical mounting grooves and the plurality of horizontal mounting grooves are evenly spaced and distributed; wherein the plurality of vertical mounting grooves are evenly distributed on the circumferential surface of the second end, and the plurality of horizontal mounting grooves are evenly distributed on the end surface of the second end; A plurality of blades are mounted in the plurality of vertical mounting slots and / or the plurality of horizontal mounting slots in a one-to-one correspondence through locking members; wherein each of the blades has eight usable cutting edges; It also includes a spray mechanism, which is fixedly connected to the cutter head body and can form a plurality of water outlets at the second end of the cutter head body; The spray mechanism comprises a cover plate, the cover plate and the blade body form a cavity, and the cavity is used to communicate with the water inlet channel; The cover plate is configured with a plurality of water outlet channels along the circumference of the cutter disc body, and the water outlet channels and the second end of the cutter disc body constitute the water outlet.

2. The roughing and finishing combined tool according to claim 1, characterized in that: The blade is a rectangular parallelepiped structure, comprising a body and four superhard blade heads. Notches are constructed at the four long sides of the blade, and the notches are suitable for fixing the superhard blade heads. Each superhard blade head has two available cutting edges.

3. The roughing and finishing combined tool according to claim 2, characterized in that: The blade has four main cutting edges and four secondary cutting edges, and the adjacent main cutting edges and secondary cutting edges can form two cutting edge faces on the rectangular parallelepiped structure; wherein each cutting edge face has four available cutting edges.

4. The roughing and finishing combined tool according to claim 3, characterized in that: An arc-shaped transition edge is connected between adjacent main cutting edges and adjacent secondary cutting edges.

5. The roughing and finishing combined tool according to claim 4, characterized in that: The blade surface is configured with a polished cambered surface.

6. The roughing and finishing combined tool according to claim 5, characterized in that: The polished curved surface is formed with a curved cutting edge.

7. The roughing and finishing combined tool according to claim 3, characterized in that: A linear transition edge and an arc transition edge are connected between adjacent main cutting edges and secondary cutting edges.

8. The roughing and finishing combined tool according to claim 7, characterized in that: From the main cutting edge to the secondary cutting edge, two sections of the linear transition edge, one section of the arcuate transition edge and two sections of the linear transition edge are included in sequence.

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