Rotary milling tool

Abstract

The utility model discloses a rotary milling cutter, and belongs to the technical field of cutters. The rotary milling cutter comprises a cutter body and a plurality of blade parts distributed around the axis of the cutter body. The blade is installed in a contact mode through the second rotating supporting piece and the first rotating supporting piece which are arranged up and down, the two rotating supporting pieces and the blade can be connected to the first fastening piece and the second fastening piece in a sleeving mode, and the first fastening piece and the second fastening piece can serve as rotating supporting shafts of other components and can also serve as rotating supporting shafts of other components. And the first fastening piece and the second fastening piece can limit the first rotary supporting piece and the second rotary supporting piece respectively, so that the blade can realize a smooth autorotation function on the cutter body, namely, the whole circle of cutting edges of the blade can be completely used in the process of milling a workpiece, and the working efficiency is improved. The problem that the blade is frequently disassembled and assembled is effectively avoided, and meanwhile the service life of the blade can be well prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of cutting tools, and in particular to a rotary milling cutting tool. Background Art

[0002] Indexable milling tools are widely used in all industries (for example, automobiles, aerospace, general machinery, molds, energy industries, etc.). With the gradual deepening of Industry 4.0, the demand for automation and intelligent production of products is increasing day by day. Automated and efficient cutting processing is the premise for promoting industrial intelligence and automation. How to achieve the requirements of long life and long tool change time in mechanical processing in the era of intelligence and automation is the development trend of cutting tools in the future.

[0003] At present, the milling blades in milling tools are usually fixed on the cutter body, and the workpiece is processed by the cutting edge at a fixed position on the cutter body. When the blade is worn or damaged, it needs to be disassembled and relocated to a new local area for cutting again, resulting in frequent disassembly and assembly of the blade during the cutting process, which in turn leads to low production efficiency of the automated production line. Utility Model Content

[0004] The embodiment of the present application provides a rotary milling tool, which can solve the problem of rapid wear of the blade and the need for frequent replacement in the prior art. The technical solution is as follows:

[0005] In one aspect, a rotary milling tool is provided, the rotary milling tool comprising:

[0006] A knife body, and a plurality of blade parts distributed around the axis of the knife body, the outer side surface of the knife body has a plurality of mounting positions corresponding to the plurality of blade parts one by one, and the blade parts are mounted at the corresponding mounting positions;

[0007] The blade portion includes: a first rotation support, a first fastener, a blade, a second rotation support, and a second fastener;

[0008] The first rotating support is fixed at the installation position, and the first rotating support has a first connecting hole; the first end of the first fastener passes through the first connecting hole and is fastened to the knife body at the installation position; the blade is located at a side of the first rotating support away from the installation position, and one end surface of the blade contacts with an end surface of the first rotating support, and the blade has a second connecting hole; the second rotating support is located at a side of the blade away from the first rotating support, and one end surface of the second rotating support contacts with the end surface of the blade away from the first rotating support, and the second rotating support has a third connecting hole connected to the second connecting hole;

[0009] The first end of the second fastener passes through the third connection hole and the second connection hole in sequence and is fastened to the first fastener, and the second end of the second fastener abuts against a side of the second rotation support member away from the blade.

[0010] Optionally, the second fastener comprises: a truncated cone-shaped limiting member and a fastening rod, one end of the fastening rod being fixedly connected to the limiting member;

[0011] The third connecting hole comprises: a first sub-hole and a second sub-hole arranged in sequence in a direction away from the mounting position, the shape of the first sub-hole matches the shape of the fastening rod, and the shape of the second sub-hole matches the shape of the limiting member;

[0012] Wherein, the side surface of the limiting member contacts the side wall of the second sub-hole, and the fastening rod passes through the first sub-hole and the second connecting hole to be fastened and connected with the first fastener.

[0013] Optionally, a fixing hole connected to the second connecting hole is provided on a side of the first fastener facing the second fastener, and the fastening rod passes through the first sub-hole and the second connecting hole in sequence to be fastened to the fixing hole.

[0014] Optionally, the first fastener has a first internal thread distributed on the inner wall of the fixing hole, and the outer side surface of the fastening rod has a first external thread matching the first internal thread.

[0015] Optionally, there is a gap between the side surface of the fastening rod and the inner wall of the second connecting hole.

[0016] Optionally, a side of the blade facing away from the first rotation support member has a first positioning groove, and at least a portion of the second rotation support member is located in the first positioning groove;

[0017] Wherein, a clearance fit is formed between the second rotation support and the first positioning groove.

[0018] Optionally, the blade has a second positioning groove on one side close to the first rotation support member, the second end of the first fastener is located in the second positioning groove, and the second end of the first fastener abuts against the side of the first rotation support member close to the blade;

[0019] Wherein, a clearance fit is formed between the second end of the first fastener and the second positioning groove.

[0020] Optionally, the blade body has a first mounting hole and a second mounting hole which are located at the mounting position and are coaxially arranged, the first mounting hole is closer to the first rotating support member than the second mounting hole, and the inner diameter of the first mounting hole is larger than the inner diameter of the second mounting hole;

[0021] Part of the first rotating support is located in the first mounting hole, and the other part is located outside the first mounting hole and in contact with the blade; the first end of the first fastener passes through the first connecting hole and is fastened to the second mounting hole.

[0022] Optionally, the knife body has a second internal thread distributed on the inner wall of the second mounting hole, and the outer side surface of the first fastener has a second external thread matching the second internal thread, wherein the rotation direction of the second external thread of the first fastener is the same as or different from the rotation direction of the first internal thread in the fixing hole of the first fastener.

[0023] Optionally, the first rotation support member is a first radial ball bearing, and the second rotation support member is a second radial ball bearing.

[0024] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0025] A rotary milling tool may include: a tool body, and a plurality of blade parts distributed around the axis of the tool body. The blade is contact-mounted by a second rotating support and a first rotating support arranged up and down, and the two rotating supports and the blade can be sleeved on a first fastener and a second fastener connected to each other. The first fastener and the second fastener can not only serve as the rotating support shaft of other components, but the first fastener and the second fastener can also limit the first rotating support and the second rotating support respectively, so that the blade can realize a smooth self-rotation function on the tool body, that is, the cutting edge of the entire circle of the blade can be fully used in the process of milling the workpiece, which effectively avoids the problem of frequent disassembly and assembly of the blade, and at the same time can well extend the service life of the blade. In addition, the self-rotation and locking functions of the blade can be realized by two rotating supports and two fasteners, which effectively simplifies the structure of the tool and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be 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 creative work.

[0027] Figure 1is a structural schematic diagram of a rotary milling tool provided in an embodiment of the present application;

[0028] Figure 2 yes Figure 1 An exploded schematic diagram of a portion of the structure of a rotary milling tool is shown;

[0029] Figure 3 yes Figure 1 A partial structural cross-sectional view of a rotary milling cutter is shown;

[0030] Figure 4 It is a schematic diagram of a connection structure of a second fastener, a second rotating support member and a blade provided in an embodiment of the present application;

[0031] Figure 5 yes Figure 4 A cross-sectional view of the structure shown;

[0032] Figure 6 is a cross-sectional view of a partial structure of another rotary milling tool provided in an embodiment of the present application;

[0033] Figure 7 It is a partial structural schematic diagram of a rotary milling tool provided in an embodiment of the present application;

[0034] Figure 8 It is a schematic structural diagram of another rotary milling tool provided in an embodiment of the present application.

[0035] Among them, the blade body 100, the blade part 200, the installation position A, the first rotating support 201, the first fastener 202, the blade 203, the second rotating support 204, the second fastener 205, the first connecting hole a1, the second connecting hole b1, the third connecting hole c1, the limit member 2051, the fastening rod 2052, the first sub-hole c11, the second sub-hole c12, the fixing hole d1, the first positioning groove b2, the second positioning groove b3, the first mounting hole e1, and the second mounting hole e2.

[0036] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0038] In the related art, the installation method of the milling tool is basically a locking method of screws, wedges, pressure plates, etc., which fastens the CNC blade to the tool body for cutting processing. This locking method allows only a part of the CNC blade to be cut during the cutting process. If the blade is worn or damaged, it needs to be disassembled and relocated to install a new local area for cutting again. During the repeated disassembly and relocation process, a series of undesirable phenomena are prone to occur, such as locking screw slippage, breakage, and deviation in blade installation accuracy.

[0039] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a schematic structural diagram of a rotary milling tool provided in an embodiment of the present application, Figure 2 yes Figure 1 The exploded schematic diagram of the partial structure of the rotary milling tool is shown. Figure 3 yes Figure 1 The rotary milling tool 000 may include: a tool body 100, and a plurality of blade portions 200 arranged in an array around the axis of the tool body 100, the outer side surface of the tool body 100 may have a plurality of mounting positions A corresponding to the plurality of blade portions 200, and each blade portion 200 may be mounted at a corresponding mounting position A of the tool body 100.

[0040] The blade part 200 in the rotary milling tool 000 may include: a first rotating support 201, a first fastener 202, a blade 203, a second rotating support 204 and a second fastener 205. It should be noted that the structures of the blade parts 200 may be the same, and a blade part is used as an example for schematic description below.

[0041] The first rotating support 201 in the blade portion 200 can be fixed at the installation position A of the blade body 100, and the first rotating support 201 can have a first connecting hole a1. The first end of the first fastener 202 can pass through the first connecting hole a1 of the first rotating support 201 and be fastened to the blade body 100 at the installation position A. The blade 203 can be located on the side of the first rotating support 201 away from the installation position A of the blade body 100, and one end surface of the blade 203 can contact one end surface of the first rotating support 201, and the blade 203 can have a second connecting hole b1. Here, the second connecting hole b1 of the blade 203 can be connected to the first connecting hole a1 of the first rotating support 201, and the second connecting hole b1 and the first connecting hole a1 can be coaxially arranged.

[0042] The second rotation support 204 in the blade portion 200 may be located on the side of the blade 203 away from the first rotation support 201, and one end surface of the second rotation support 204 may contact the end surface of the blade 203 away from the first rotation support 201, and the second rotation support 204 may have a third connection hole c1 connected to the second connection hole b1 of the blade 203. Here, the third connection hole c1 of the second rotation support 204 and the second connection hole b1 of the blade 203 may be coaxially arranged.

[0043] The first end of the second fastener 205 passes through the third connection hole c1 of the second rotation support 204 and the second connection hole b1 of the blade 203 in sequence and is fastened to the first fastener 202, and the second end of the second fastener 205 can abut against the side of the second rotation support 204 away from the blade 203. Here, the first end and the second end of the second fastener 205 are two ends arranged opposite to each other.

[0044] In the embodiment of the present application, the blade 203 is contact-mounted by the second rotating support 204 and the first rotating support 201 arranged up and down, and the two rotating supports and the blade 203 can be sleeved on the first fastener 202 and the second fastener 205 connected to each other, and the first fastener 202 and the second fastener 205 can not only serve as the rotation support shaft of other components, but also the first fastener 202 and the second fastener 205 can limit the first rotating support 201 and the second rotating support 204 respectively, so that the blade 203 can realize the smooth self-rotation function on the cutter body 201, that is, the cutting edge of the entire circle of the blade 203 can be fully used in the process of milling the workpiece, which effectively avoids the problem of frequent disassembly and assembly of the blade 203, and at the same time can well extend the service life of the blade 203. In addition, the self-rotation and locking functions of the blade 203 can be realized by two rotating supports and two fasteners, which effectively simplifies the structure of the tool and reduces the manufacturing cost.

[0045] In summary, the embodiment of the present application provides a rotary milling tool, which may include: a cutter body 100, and a plurality of blade portions 200 distributed around the axis of the cutter body 100. The blade 203 is contact-installed by the second rotating support 204 and the first rotating support 201 arranged up and down, and the two rotating supports and the blade 203 can be sleeved on the first fastener 202 and the second fastener 205 connected to each other, and the first fastener 202 and the second fastener 205 can not only serve as the rotation support shaft of other components, but also the first fastener 202 and the second fastener 205 can limit the first rotating support 201 and the second rotating support 204 respectively, so that the blade 203 can realize a smooth self-rotation function on the cutter body 100, that is, the cutting edge of the entire circle of the blade 100 can be fully used in the process of milling the workpiece, which effectively avoids the problem of frequent disassembly and assembly of the blade 100, and can also well extend the service life of the blade 100. In addition, the self-rotation and locking functions of the blade can be realized through two rotating supports and two fasteners, which effectively simplifies the structure of the tool and reduces the manufacturing cost.

[0046] Optional, please refer to Figure 1 , Figure 4 and Figure 5 , Figure 4 is a schematic diagram of a connection structure of a second fastener, a second rotating support member and a blade provided in an embodiment of the present application, Figure 5 yes Figure 4The cross-sectional view of the structure shown. The second fastener 205 may include: a truncated cone-shaped stopper 2051 and a fastening rod 2052, one end of which may be fixedly connected to the stopper 2051. The third connection hole c1 of the second rotating support 204 may include: a first sub-hole c11 and a second sub-hole c12 arranged in sequence in a direction away from the installation position A of the blade 100, the shape of the first sub-hole c11 may match the shape of the fastening rod 2052, and the shape of the second sub-hole c12 may match the shape of the stopper 2051. The side surface of the stopper 2051 may contact the side wall of the second sub-hole c12, and the fastening rod 2052 may pass through the first sub-hole c11 and the second connection hole b1 of the blade 203 to be fastened to the first fastener 202. In this case, by providing the second fastener 205 with a mutually connected stopper 2051 and a fastening rod 2052, and the stopper 2051 can be in a truncated cone shape, the stopper 2051 and the second rotating support 204 can be accurately positioned and installed, and the connection stability between the second fastener 205 and the second rotating support 204 is ensured. For example, the side of the truncated cone-shaped stopper 2051 can be an arc surface, and the side wall of the second sub-hole c12 that contacts with the stopper 2051 can also be an arc surface. It should be noted that the width of the stopper 2051 is greater than the width of the fastening rod 2052, and the inner diameter of the second sub-hole c12 is greater than the inner diameter of the first sub-hole c11, so that the side of the stopper 2051 can contact with the side wall of the second sub-hole c12 to press the second rotating support 204.

[0047] In the embodiments of the present application, Figure 5 As shown, there may be a gap between the side of the fastening rod 2052 in the second fastening member 205 and the inner wall of the second connecting hole b1 of the blade 203. In this case, by providing a gap between the second connecting hole b1 of the blade 203 and the side of the fastening rod 2052, it can be effectively ensured that the blade 203 will not interfere with the fastening rod 2052 in the second fastening member 205 during the self-rotation process, thereby ensuring the normal milling operation of the blade 203.

[0048] In the examples of this application, please refer to Figure 6 , Figure 62 is a cross-sectional view of a partial structure of another rotary milling tool provided in an embodiment of the present application. The first fastener 202 may have a fixing hole d1 connected to the second connection hole b1 of the blade 203 on one side thereof facing the second fastener 205, and the fastening rod 2052 in the second fastener 205 may pass through the first sub-hole c11 in the third connection hole c1 and the second connection hole b1 of the blade 203 in sequence to be fastened and connected to the fixing hole d1 of the first fastener 202. In this case, by providing a fixing hole d1 connected to the second connection hole b1 of the blade 203 on one side of the first fastener 202 facing the second fastener 205, the fastening rod 2052 in the second fastener 205 may be accurately fixed to the first fastener 202 by connecting to the fixing hole d1, and the connection between the second fastener 205 and the first fastener 202 is more convenient. Here, the fixing hole d1 in the first fastener 202, the second connection hole b1 of the blade 203, and the third connection hole c1 in the second rotating support 204 may be coaxially arranged.

[0049] In the embodiments of the present application, Figure 6 As shown, the first fastener 202 may have a first internal thread distributed on the inner wall of the fixing hole d1, and the outer side surface of the fastening rod 2052 may have a first external thread (not shown in the figure) that matches the first internal thread of the first fastener 202. In this way, the fastening rod 2052 in the second fastener 205 can be threadedly connected with the first internal thread in the fixing hole d1 of the first fastener 202 through the first external thread to achieve a fastened connection between the two. In addition, after the second fastener 205 and the first fastener 202 are threadedly connected, when the blade needs to be disassembled for maintenance or replacement, the second fastener 205 and the first fastener 202 are also convenient for disassembly and separation, which improves the convenience of operation for operators. It should be noted that the second fastener 205 can also be fastened and connected with the first fastener 202 through other connection methods, for example, the second fastener 205 can be fastened and connected with the first fastener 202 through a clamping method.

[0050] Optional, such as Figure 3 and Figure 5As shown, the blade 203 may have a first positioning groove b2 on the side away from the first rotation support 201, and at least a portion of the second rotation support 204 may be located in the first positioning groove b2. A clearance fit may be formed between the second rotation support 204 and the first positioning groove b2 of the blade 203. In this case, by providing the first positioning groove b2 on the side of the blade 203 away from the first rotation support 201, during the assembly process of the second rotation support 204 and the blade 203, the first positioning groove b2 may be used to ensure the installation position accuracy of the second rotation support 204 and the blade 203. A clearance fit is formed between the second rotation support 204 and the first positioning groove b2, ensuring that the blade 203 will not interfere with the side of the second rotation support 204 during the rotation process. For example, the distance between the side of the second rotation support member 204 and the inner wall of the first positioning groove b2 may range from 0.01 mm to 0.02 mm. For example, the distance between the side of the second rotation support member 204 and the inner wall of the first positioning groove b2 may be 0.015 mm.

[0051] In the embodiments of the present application, Figure 6 As shown, the blade 203 may have a second positioning groove b3 on one side close to the first rotating support 201, the second end of the first fastener 202 may be located in the second positioning groove b3, and the second end of the first fastener 202 abuts against the side of the first rotating support 201 close to the blade 203. A clearance fit may be formed between the second end of the first fastener 202 and the second positioning groove b3 of the blade 203. In this case, by providing the second positioning groove b3 on the side of the blade 203 close to the first rotating support 201, the installation position accuracy of the blade 203 and the first fastener 202 may be ensured by the second positioning groove b3. A clearance fit is formed between the second end of the first fastener 202 and the second positioning groove b3, ensuring that the blade 203 will not interfere with the first fastener 202 during rotation. Here, the second end of the first fastener 202 may be an end arranged opposite to the first end of the first fastener 202.

[0052] Optional, such as Figure 6As shown, the blade body 100 may have a first mounting hole e1 and a second mounting hole e2 located at the mounting position A and may be coaxially arranged. The first mounting hole e1 may be closer to the first rotating support 201 relative to the second mounting hole e2, and the inner diameter of the first mounting hole e1 may be larger than the inner diameter of the second mounting hole e2. Part of the first rotating support 201 may be located in the first mounting hole e1, and another part of the first rotating support 201 may be located outside the first mounting hole e1 and may contact the blade 203. The first end of the first fastener 202 may pass through the first connecting hole a1 of the first rotating support 201 and be fastened to the second mounting hole e2 of the blade body 100. In this case, please refer to Figure 7 and Figure 8 , Figure 7 is a partial structural schematic diagram of a rotary milling tool provided in an embodiment of the present application, Figure 8 : is a schematic diagram of the structure of another rotary milling tool provided by an embodiment of the present application. The first rotating support 201 can be installed in the first mounting hole e1 to ensure the installation stability of the first rotating support 201 and the cutter body 100, and the blade 203 can contact the part of the first rotating support 201 located outside the first mounting hole e1, so that there is a gap e3 between the lower end face of the blade 203 and the end face of the part of the cutter body 100 where the first mounting hole e1 is provided, ensuring that the blade 203 will not interfere with the cutter body 100 during the rotation process. For example, the distance range of the gap e3 can be: 0.1 mm to 0.3 mm.

[0053] In the embodiments of the present application, Figure 6 As shown, the blade body 100 may have a second internal thread distributed on the inner wall of the second mounting hole e2, and the outer side surface of the first fastener 202 may have a second external thread (not shown in the figure) that matches the second internal thread. In this way, the first fastener 202 can be threadedly connected to the second internal thread in the second mounting hole e2 of the blade body 100 through the second external thread to achieve a fastened connection between the two. In addition, after the first fastener 202 and the blade body 100 are threadedly connected, when the blade 203 needs to be disassembled for maintenance or replacement, the first fastener 202 and the blade body 100 are also conveniently disassembled and separated, thereby improving the convenience of the operator. It should be noted that the first fastener 202 can also be fastened to the blade body 100 through other connection methods, for example, the first fastener 202 can be fastened to the blade body 100 through a snap-on method.

[0054] For example, the rotation direction of the second external thread of the first fastener 202 can be different from the rotation direction of the first internal thread of the fixing hole d1 of the first fastener 202, so that the first fastener 202 will not loosen when the second fastener 205 is removed. In other possible implementations, the rotation direction of the second external thread of the first fastener 202 can also be the same as the rotation direction of the first internal thread of the fixing hole d1 of the first fastener 202, and a certain external force is applied to the first fastener 202 when the second fastener 205 is removed, and the first fastener 202 will not loosen.

[0055] In the embodiment of the present application, the first rotation support member 201 in the blade portion 200 may be a first radial ball bearing, and the second rotation support member 204 in the blade portion 200 may be a second radial ball bearing. In this case, by using the first radial ball bearing and the second radial ball bearing to contact-install the blade, the stability of the blade 203 when self-rotating to mill the workpiece is ensured, thereby ensuring a good user experience for the operator.

[0056] In summary, the embodiment of the present application provides a rotary milling tool, which may include: a cutter body 100, and a plurality of blade portions 200 distributed around the axis of the cutter body 100. The blade 203 is contact-installed by the second rotating support 204 and the first rotating support 201 arranged up and down, and the two rotating supports and the blade 203 can be sleeved on the first fastener 202 and the second fastener 205 connected to each other, and the first fastener 202 and the second fastener 205 can not only serve as the rotation support shaft of other components, but also the first fastener 202 and the second fastener 205 can limit the first rotating support 201 and the second rotating support 204 respectively, so that the blade 203 can realize a smooth self-rotation function on the cutter body 100, that is, the cutting edge of the entire circle of the blade 100 can be fully used in the process of milling the workpiece, which effectively avoids the problem of frequent disassembly and assembly of the blade 100, and can also well extend the service life of the blade 100. In addition, the self-rotation and locking functions of the blade can be realized through two rotating supports and two fasteners, which effectively simplifies the structure of the tool and reduces the manufacturing cost.

[0057] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0058] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0059] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary milling tool, characterized in that: include: A knife body, and a plurality of blade parts distributed around the axis of the knife body, the outer side surface of the knife body has a plurality of mounting positions corresponding to the plurality of blade parts one by one, and the blade parts are mounted at the corresponding mounting positions; The blade portion includes: a first rotation support, a first fastener, a blade, a second rotation support, and a second fastener; The first rotating support is fixed at the installation position, and the first rotating support has a first connecting hole; the first end of the first fastener passes through the first connecting hole and is fastened to the knife body at the installation position; the blade is located at a side of the first rotating support away from the installation position, and one end surface of the blade contacts with an end surface of the first rotating support, and the blade has a second connecting hole; the second rotating support is located at a side of the blade away from the first rotating support, and one end surface of the second rotating support contacts with the end surface of the blade away from the first rotating support, and the second rotating support has a third connecting hole connected to the second connecting hole; The first end of the second fastener passes through the third connection hole and the second connection hole in sequence and is fastened to the first fastener, and the second end of the second fastener abuts against a side of the second rotating support member away from the blade.

2. The rotary milling tool according to claim 1, characterized in that The second fastener comprises: a truncated cone-shaped position-limiting member and a fastening rod, one end of the fastening rod being fixedly connected to the position-limiting member; The third connecting hole comprises: a first sub-hole and a second sub-hole arranged in sequence in a direction away from the mounting position, the shape of the first sub-hole matches the shape of the fastening rod, and the shape of the second sub-hole matches the shape of the limiting member; Wherein, the side surface of the limiting member contacts the side wall of the second sub-hole, and the fastening rod passes through the first sub-hole and the second connecting hole to be fastened and connected with the first fastener.

3. The rotary milling tool according to claim 2, characterized in that The first fastener has a fixing hole connected to the second connecting hole on one side thereof facing the second fastener, and the fastening rod passes through the first sub-hole and the second connecting hole in sequence and is fastened to the fixing hole.

4. The rotary milling tool according to claim 3, characterized in that The first fastener has a first internal thread distributed on the inner wall of the fixing hole, and the outer side surface of the fastening rod has a first external thread matching the first internal thread.

5. The rotary milling tool according to claim 2, characterized in that There is a gap between the side surface of the fastening rod and the inner wall of the second connecting hole.

6. The rotary milling tool according to any one of claims 1 to 5, characterized in that: The blade has a first positioning groove on one side facing away from the first rotation support member, and at least a portion of the second rotation support member is located in the first positioning groove; Wherein, a clearance fit is formed between the second rotation support and the first positioning groove.

7. The rotary milling tool according to claim 6, characterized in that The blade has a second positioning groove on one side close to the first rotation support member, the second end of the first fastener is located in the second positioning groove, and the second end of the first fastener abuts against the side of the first rotation support member close to the blade; Wherein, a clearance fit is formed between the second end of the first fastener and the second positioning groove.

8. The rotary milling tool according to claim 4, characterized in that The blade body has a first mounting hole and a second mounting hole which are coaxially arranged at the mounting position, the first mounting hole is closer to the first rotating support member than the second mounting hole, and the inner diameter of the first mounting hole is larger than the inner diameter of the second mounting hole; Part of the first rotating support is located in the first mounting hole, and the other part is located outside the first mounting hole and in contact with the blade; the first end of the first fastener passes through the first connecting hole and is fastened to the second mounting hole.

9. The rotary milling tool according to claim 8, characterized in that The cutter body has a second internal thread distributed on the inner wall of the second mounting hole, and the outer side surface of the first fastener has a second external thread matching the second internal thread; The rotation direction of the second external thread of the first fastener is the same as or different from the rotation direction of the first internal thread in the fixing hole of the first fastener.

10. The rotary milling tool according to any one of claims 1-5, 7-9, characterized in that: The first rotation support member is a first radial ball bearing, and the second rotation support member is a second radial ball bearing.

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