Blade self-rotating machining tool

Abstract

The utility model discloses a blade self-rotation machining tool which comprises a tool handle assembly, the tool handle assembly comprises a columnar tool handle body, the two axial ends of the tool handle body are provided with a first connecting end and a second connecting end respectively, the first connecting end is connected with a main shaft, and the main shaft can be driven to rotate so as to drive the tool handle body to rotate around the axis of the main shaft; the tool bit assembly is connected to the second connecting end and comprises a tool bit body and a plurality of blades, the tool bit body is provided with a columnar part coaxial with the tool handle body, the two ends of the tool bit body are provided with a first end and a second end respectively, and the first end and the second connecting end are assembled and connected together. The multiple blades are arranged on the peripheral wall face of the second end in the circumferential direction at intervals, and any blade can rotate relative to the tool bit body. The whole cutting edge of the tool bit is fully utilized, abrasion is even, the temperature of the blade can be reduced, the service life is prolonged, long-time continuous cutting can be achieved, the time for manually intervening shutdown to rotate the blade is shortened, and the machining capacity is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal processing cutter technical field, concretely relates to a blade self-rotating processing cutter. BACKGROUND

[0002] In metal processing, the excess metal blank material needs to be removed, and the cutter with fixed locking blade is generally used for rough machining. In the prior art, the cutter with blade is locked and fixed by screw cutting, and the disadvantage is that the blade can only be fixed cutting edge cutting, and the wear is fast, the heat is concentrated in the cutting point, the blade temperature is high, the heat dissipation is slow, the blade service life is shortened, and manual frequent intervention is needed to stop the blade to ensure normal cutting of the cutter. If the blade wear is not found in time, the whole cutter will be scrapped, and the workpiece will be seriously overcut. Therefore, the utility model comes from this. SUMMARY

[0003] In view of at least one of the above technical problems, the utility model aims to provide a blade self-rotating processing cutter.

[0004] The technical scheme of the utility model is:

[0005] The utility model aims to provide a blade self-rotating processing cutter, which comprises:

[0006] The shank assembly comprises a cylindrical shank main body, the axial two ends of the shank main body are respectively implemented as a first connecting end and a second connecting end, wherein the first connecting end is connected with the main shaft, and the main shaft can be driven to rotate to drive the shank main body to rotate around its axis.

[0007] The tool head assembly is connected to the second connecting end, and the tool head assembly comprises a tool head main body and a plurality of blades. The tool head main body has a cylindrical part coaxially arranged with the shank main body, and the two ends of the tool head main body are respectively implemented as a first end and a second end. The first end and the second connecting end are assembled and connected together, and a plurality of the blades are circumferentially spaced apart on the outer peripheral wall surface of the second end, and any blade is rotatable relative to the tool head main body.

[0008] Preferably, the main shaft is provided with a first connecting structure, the first connecting end is provided with a second connecting structure, and the main shaft and the first connecting end are assembled and connected together through the first connecting structure and the second connecting structure.

[0009] Preferably, the main shaft is provided with a first connecting structure, the first connecting end is provided with a second connecting structure, and the main shaft and the first connecting end are assembled and connected together through the first connecting structure and the second connecting structure.

[0010] The shank assembly further comprises a first connecting body formed on the first connecting end and protruding outward along the axis direction of the shank body, and assembled with the mounting groove; the second connecting structure comprises a first connecting piece connected to one end of the first connecting body away from the first connecting end of the shank body, and a plurality of first positioning grooves formed on the outer peripheral wall of the first connecting end in a circumferential direction.

[0011] When assembled, the first connecting body is inserted into the mounting groove, the first connecting piece is matched with the clamping claw, and the first positioning block is inserted into and clamped in the first positioning groove.

[0012] Preferably, the first connecting piece is a screw assembled and connected with the first connecting body, and / or

[0013] The first connecting body is a frustum structure coaxial with the shank body.

[0014] Preferably, the second connecting end is provided with a third connecting structure, the first end is provided with a fourth connecting structure, and the second connecting end and the first end are assembled together through the third connecting structure and the fourth connecting structure.

[0015] Preferably, the shank assembly further comprises a second connecting body formed at the middle position of the second connecting end and protruding outward along the axis direction of the shank body, the third connecting structure comprises the second connecting body, a plurality of second positioning grooves recessed and extending along the axis direction of the shank body towards the first connecting end direction and formed on the second connecting end in a circumferential direction, and a plurality of second positioning blocks assembled one by one in the plurality of second positioning grooves, any second positioning block partially exposes outside the corresponding second positioning groove;

[0016] The first end is in a cylindrical shape, the fourth connecting structure comprises a positioning hole formed at the middle position of the first end and recessed and extending along the axis direction of the shank body towards the second end direction, a plurality of third positioning grooves recessed and extending along the axis direction of the first end towards the second end direction and arranged in a circumferential direction on the first end, and a second connecting piece passing through the positioning hole from the second end;

[0017] When assembled, the second connecting body is inserted into the positioning hole and assembled and connected with the second connecting piece, and the part of any second positioning block exposed outside the corresponding second positioning groove is inserted one by one into the third positioning groove.

[0018] Preferably, the second connecting piece is a screw, and / or

[0019] The second connecting body is a cylindrical structure coaxial with the shank body.

[0020] Preferably, the second end of the tool head is frustoconical, and a plurality of flutes are formed on the outer peripheral wall of the second end and extend along the axial direction of the tool head body and are recessed inwardly along the radial direction of the tool head body, and any of the inserts is rotatably fitted in the corresponding flute and at least partially extends out of the flute.

[0021] Preferably, a groove is formed between any two adjacent flutes and extends along the axial direction of the tool head body and is recessed inwardly along the radial direction of the tool head body, and a pin hole is formed on an inner side wall of any of the grooves and extends through the corresponding flute, and a pin screw is threadedly connected in any of the pin holes, and an axial segment for rotatably connecting the corresponding insert is formed on the pin screw.

[0022] Preferably, a locking hole is further formed on the inner side wall of any of the grooves and extends through the corresponding flute, and a locking block is further arranged on the outer end of the pin screw, one end of the locking block is pressed against the outer side of the pin hole and is fixed with the outer end of the pin screw, and the other end is fixed with the tool head body by a locking screw connected in the locking hole, and / or

[0023] A blowing hole is formed in any of the flutes and is connectable with a gas source.

[0024] Compared with the prior art, the tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved.

[0025] The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved.

[0027] Figure 1 The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved.

[0028] Figure 2 The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved. Figure 1 The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved.

[0029] Figure 3 The tool head assembly of the tool head is fixedly connected with the tool shank assembly, and the plurality of inserts are rotatably connected with the tool head body, so that the plurality of inserts are automatically rotated relative to the tool head body under the cutting force during the cutting operation, the entire cutting edge of the tool head is fully utilized, the wear of the tool head is more uniform, the temperature during the cutting of the inserts is reduced, the service life of the tool is prolonged, the tool can be continuously used for a long time, the time for manually stopping and replacing the inserts is reduced, and the machining capacity is effectively improved.

[0030] Figure 4 It is the explosion map of the tool head assembly of the blade self-rotating machining tool.

[0031] Wherein: 100, main shaft; 101, clamping jaw; 102, first positioning block; 200, shank assembly; 201, first connecting piece; 202, first positioning groove; 203, second positioning groove; 204, second positioning block; 205, fastening screw; 210, shank main body; 220, first connecting body; 230, second connecting body; 300, tool head assembly; 310, tool head main body; 311, positioning hole; 312, third positioning groove; 313, tool groove; 314, pin hole; 315, groove; 316, locking hole; 317, blowing hole; 318, second connecting piece; 320, blade; 321, bolt; 322, locking block; 323, locking screw. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0033] The utility model embodiment of a kind of blade self-rotating machining tool, see Figures 1 to 4 , mainly including shank assembly 200 and tool head assembly 300 two parts. Wherein shank assembly 200 one end is connected with main shaft 100, the other end is connected with tool head assembly 300. For shank assembly 200, as shown in Figure 3 , including a columnar shank main body 210, the axial two ends of shank main body 210, i.e. as shown in Figure 3 The upper and lower ends are respectively implemented as first connecting end and second connecting end, the first connecting end is connected with main shaft 100, and the second connecting end is connected with tool head assembly 300. Main shaft 100 is not a component part of tool, but as external component when assembled with tool and used to drive tool to rotate to carry out cutting operation. That is, main shaft 100 is driven to rotate and drives tool including shank assembly 200 and tool head assembly 300 to rotate around the axial direction of shank assembly 200 to make tool head assembly 300 complete cutting operation. For tool head assembly 300, as shown in Figure 3 And Figure 4 , including a tool head main body 310 and several blades 320, the tool head main body 310 has a columnar portion and is coaxially arranged with shank main body 210, and the two ends of tool head main body 310 are specifically as Figure 4The upper and lower ends shown are respectively implemented as the first end and the second end. The first end is connected to the second connecting end of the handle body 210. A plurality of blades 320 are circumferentially spaced on the outer peripheral wall of the second end of the blade head body 310, and any blade 320 is rotatable relative to the blade head body 310. It should be noted that the plurality of blades 320 are at the same height on the outer peripheral surface of the blade head body 310, that is, at the same horizontal position. For example, taking the setting position of each blade 320 as a point, the setting positions of the plurality of blades 320 form a plurality of points. These plurality of points are connected in sequence to form a circle with a vertical axis (not shown). The centers of the plurality of blades 320 are sequentially arranged on this circle and evenly spaced, and each blade 320 rotates around this circle. In this embodiment of the present invention, the cutter head assembly 300 is configured as a cutter head body 310 fixedly connected to the cutter shank assembly 200 and a plurality of blades 320 rotatably connected to the cutter head body 310. When performing cutting operations, the plurality of blades 320 are automatically rotated relative to the cutter head body 310 under the cutting force, thereby making full use of the entire cutting edge of the cutter head, resulting in more uniform wear of the cutter head, reducing the temperature of the blades 320 during cutting, extending the service life of the tool, enabling continuous cutting for a long time, reducing the time of manual intervention to stop and rotate the blades 320, and effectively improving processing capacity.

[0034] Regarding the connection structure between the spindle 100 and the cutter head assembly 300, in this embodiment of the invention, a first connection structure is provided on the spindle 100, and a second connection structure is provided on the first connection end of the cutter head body 310. The connection between the spindle 100 and the cutter head assembly 300 is achieved by assembling the first and second connection structures. Specifically, as shown... Figure 2 As shown, a mounting slot (not shown) is provided inside the spindle 100, and the mounting slot is made of, for example, Figure 2 The lower end of the spindle 100 shown extends upwards but does not penetrate the upper end; the exemplary mounting groove is a frustoconical blind hole. At the inner end of the mounting groove, i.e.... Figure 2 The upper or top end shown is provided with a radially retractable or expandable claw 101 (the specific structure is not described or limited, and can be two, three, or four conventional claws spaced circumferentially to define a locking cavity (not shown) in the middle), at the outer end of the mounting groove, i.e. Figure 2 The mounting groove shown has several first positioning blocks 102 at its outer end. These first positioning blocks 102 are arranged circumferentially around the opening of the mounting groove, with each first positioning block 102 protruding downwards. The specific structure is not described or limited. In other words, the first connecting structure includes a pawl 101 and several positioning blocks. Correspondingly, a frustum-shaped structure is provided on the first connecting end of the tool holder body 210, extending outwards from the first connecting end along the axis of the tool holder body 210. Figure 3The first connecting body 220 shown protrudes upwardly, which is matched with the shape and size of the mounting groove and is adapted to be inserted into the mounting groove when assembled. The end of the first connecting body 220 away from the first connecting end is also shown as Figure 3 The upper end of the first connecting body 220 is provided with a first connecting piece 201, which is connected with the clamping jaw 101 when assembled, that is, the first connecting piece 201 is clamped into the clamping cavity of the clamping jaw 101. Meanwhile, a plurality of first positioning grooves 202 are arranged on the outer peripheral wall surface of the first connecting end of the shank body 210 in a spaced manner and are radially concave, the number of the first positioning grooves 202 corresponds to the number of the first positioning blocks 102, and the first positioning grooves 202 are inserted and clamped with the first positioning blocks 102 when assembled. For example, a radially outwardly extending annular ring (not shown) is formed on the first connecting end of the shank body 210, and the first positioning grooves 202 are formed on the annular ring, which can limit the assembly of the first connecting piece 201 and the mounting groove and can avoid the machining of the first positioning grooves 202 to reduce the structural strength of the first connecting end of the shank body 210. The number of the first positioning grooves 202 and the number of the first positioning blocks 102 are not limited and can be two or three or four or the like. The shapes of the first positioning grooves 202 and the first positioning blocks 102 are not described and limited. Optionally, the first connecting piece 201 is threadedly connected with the first connecting body 220 in a detachable manner. For example, the first connecting piece 201 is a conventional Latin, which is coaxially integrally formed, that is, as shown in the figure Figure 3 The two T-shaped structures arranged in an up-down manner are shown, and the outer diameter of the lower end T-shaped structure is larger than that of the upper end T-shaped structure. The outer surface of the lower end T-shaped structure is formed with external threads to be assembled and connected with the connecting hole formed in the middle of the upper end of the first connecting body 220. The upper end T-shaped structure is used to be clamped with the clamping jaw 101. In a preferred embodiment, the first connecting body 220 is integrally formed with the shank body 210.

[0035] For the connection of the shank assembly 200 and the tool bit assembly 300, the third connecting structure and the fourth connecting structure are used to achieve the connection in the embodiment of the utility model. Specifically, the third connecting structure is arranged on the second connecting end of the shank body 210, and the fourth connecting structure is arranged on the first end of the tool bit body 310, that is, as shown in the figure Figure 4 The upper end is provided with the fourth connecting structure, and the third connecting structure and the fourth connecting structure are matched and assembled to fix the shank assembly 200 and the tool bit assembly 300 together. More specifically, as shown in the figure Figure 3 The second connecting end of the shank body 210 is also shown as Figure 3 The lower end of the shank body 210 is formed with a connecting hole in the middle position in the axial direction of the shank body 210, that is, as shown in the figure Figure 3The second connecting body 230 is shown to extend downwardly, while a plurality of second positioning slots 203 are shown to extend upwardly and are circumferentially spaced apart on the second end of the shank body 210 and axially recessed towards the first end of the shank body 210. In addition, a second positioning block 204 is fixed in each of the second positioning slots 203. The second positioning block 204 is preferably fixed in the corresponding second positioning slot 203 by a fastening screw 205. That is, the second connecting body 230, the second positioning slots 203 and the second positioning blocks 204 together form a third connecting structure. It is noted that the second connecting body 230 is a cylindrical structure coaxial with the shank body 210. Figure 3 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. Figure 4 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. Figure 4 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. Figure 4 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. Figure 4 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. Figure 4 The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210. The second end of the second connecting body 230 is shown to be tapered. A first end of the second connecting body 230 is shown to be formed as a cylindrical structure with a diameter identical to that of the shank body 210.

[0036] For the insert 320, as shown inFigure 4 As shown, the blade 320 is a conical structure. In order to realize the rotation connection between the blade 320 and the tool head body 310, a plurality of tool grooves 313 extending along the axial direction of the tool head body 310 and recessed radially inward are formed on the outer wall surface of the second end of the tool head body 310 in the circumferential direction, one blade 320 is rotationally arranged in each tool groove 313 and the blade 320 is partially protruded out of the tool groove 313, so that the blade 320 can contact the workpiece to be cut during cutting processing. More specifically, a groove 315 also extending along the axial direction of the tool head body 310 and recessed radially inward is arranged between any two adjacent tool grooves 313, a pin hole 314 is formed on one inner side wall of each groove 315 and extends transversely to the tool groove 313 adjacent to the groove 315, a T-shaped pin screw 321 is threadedly connected in the pin hole 314, one end of the pin screw 321 protruding out of the pin hole 314 and in the tool groove 313 is formed with a smooth shaft section, and the shaft section is used for rotationally cooperating with the blade 320. In a further preferred embodiment, in order to prevent the pin screw 321 from rotating and coming out of the pin hole 314 when the blade 320 rotates, a locking assembly is further arranged on the outside of the pin hole 314, the locking assembly includes a plate-shaped locking block 322 and a locking screw 323 penetrating one end of the locking block 322, and a locking hole 316 is further formed on the inner side wall of the groove 315 having the pin hole 314, the locking screw 323 is threadedly connected with the locking hole 316 after penetrating one end of the locking block 322, the other end of the locking block 322 is pressed against the outside of the pin hole 314, and a protrusion (not shown) is arranged on the locking block 322 and matches a recess (not shown) on the outer end cap of the pin screw, during installation, the protrusion is clamped in the recess to fix the locking block 322 and the pin screw. In an alternative embodiment, a blowing hole 317 is further formed in any tool groove 313, the blowing hole 317 is connected with a gas source and is used for blowing outward to blow the cutting debris generated during cutting operation from the tool head assembly 300, so as to ensure the smooth cutting operation and reduce the subsequent cleaning difficulty. Similarly, the number of the blades 320 is not described and limited, and can be two, three, four or the like. As an alternative embodiment, the blade 320 can also be a sheet structure.

[0037] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A blade self-rotating machining tool, characterized by The utility model relates to a tool holder assembly and a tool head assembly, and more particularly to a tool holder assembly and a tool head assembly for a machine tool. The tool holder assembly comprises a tool holder body in the shape of a cylinder, the axial two ends of the tool holder body are respectively implemented as a first connecting end and a second connecting end, wherein the first connecting end is connected with a main shaft, the main shaft can be driven to rotate to drive the tool holder body to rotate around its axis. The tool head assembly is connected to the second connecting end, and the tool head assembly comprises a tool head body and a plurality of blades, the tool head body has a cylindrical part coaxially arranged with the tool holder body, and the two ends of the tool head body are respectively implemented as a first end and a second end, the first end is assembled and connected with the second connecting end, and the plurality of blades are circumferentially spaced on the outer peripheral wall surface of the second end, and any blade is rotatable relative to the tool head body.

2. The blade self-rotating machining tool according to claim 1, characterized in that, The main shaft is provided with a first connecting structure, the first connecting end is provided with a second connecting structure, and the main shaft and the first connecting end are assembled and connected together through the first connecting structure and the second connecting structure.

3. The blade self-rotating machining tool according to claim 2, characterized in that, The main shaft is provided with a mounting groove extending along its axis, the first connecting structure comprises a claw located at the inner end of the mounting groove and a plurality of first positioning blocks circumferentially spaced on the outer end of the mounting groove. The tool holder assembly further comprises a first connecting body formed on the first connecting end and protruding outwardly along the axis of the tool holder body and assembled with the mounting groove, and the second connecting structure comprises a first connecting piece connected to one end of the first connecting body away from the first connecting end of the tool holder body and a plurality of first positioning grooves circumferentially spaced on the outer peripheral wall surface of the first connecting end. During assembly, the first connecting body is fitted into the mounting groove, the first connecting piece is matched with the claw, and the first positioning blocks are inserted and clamped one by one with the first positioning grooves.

4. The blade self-rotating machining tool according to claim 3, characterized in that, The first connecting piece is a Latin screw assembled and connected with the first connecting body, and / or The first connecting body is a frustum structure coaxial with the tool holder body.

5. The blade self-rotating machining tool according to claim 1, characterized in that, The second connecting end is provided with a third connecting structure, the first end is provided with a fourth connecting structure, and the second connecting end and the first end are assembled together through the third connecting structure and the fourth connecting structure.

6. The blade self-rotating machining tool according to claim 5, characterized in that The tool holder assembly further comprises a second connecting body formed at the middle position of the second connecting end and protruding outwardly along the axis of the tool holder body, the third connecting structure comprises the second connecting body, a plurality of second positioning grooves recessed and extending along the axis of the tool head body towards the first connecting end direction and circumferentially spaced on the second connecting end, and a plurality of second positioning blocks assembled one by one in the plurality of second positioning grooves, any second positioning block partially exposes outside the corresponding second positioning groove. The first end is cylindrical, the fourth connecting structure comprises a positioning hole formed in the middle of the first end and recessed extending along the axial direction of the tool bit body towards the second end, and a plurality of third positioning grooves recessed extending along the axial direction of the first end towards the second end and arranged along the circumference of the first end, and a second connecting member passing through the positioning hole from the second end; During assembly, the second connecting body is inserted into the positioning hole and assembled together with the second connecting member, and the part of any second positioning block exposed outside the corresponding second positioning groove is correspondingly clamped into the third positioning groove.

7. The blade self-rotating machining tool according to claim 6, characterized in that The second connecting member is a screw, and / or The second connecting body is a cylindrical structure coaxial with the tool handle body.

8. The blade self-rotating machining tool according to claim 1, characterized in that, The second end of the tool bit is frustoconical, and the outer peripheral wall surface of the second end is provided with a plurality of tool grooves extending along the axial direction of the tool bit body and recessed inward along the radial direction of the tool bit body, and any tool blade is rotationally fitted in the corresponding tool groove and at least partially extends out of the tool groove.

9. The blade self-rotating machining tool according to claim 8, characterized in that, Any two adjacent tool grooves form a groove extending along the axial direction of the tool bit body and recessed inward along the radial direction of the tool bit body, and any groove has a pin hole in an inner side wall thereof, the pin hole penetrating the corresponding side of the tool groove, and any pin hole is threadedly connected with a latch screw, and any latch screw has a shaft segment for rotationally connecting the corresponding tool blade.

10. The blade self-rotating machining tool according to claim 9, characterized in that, The inner side wall of any groove with the pin hole further has a locking hole, and the outer end of the latch screw is further provided with a locking block, one end of the locking block is pressed against the outside of the pin hole and fixed with the outer end of the latch screw, and the other end is fixed with the tool bit body through a locking screw connected in the locking hole, and / or Any tool groove has a gas blowing hole connectable with a gas source. Any tool groove has a gas blowing hole connectable with a gas source.

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