Blade self-rotating machining tool

Abstract

The utility model discloses a blade self-rotating machining cutter which comprises a cutter handle assembly connected with a main shaft, and the main shaft rotates to drive the cutter handle assembly to rotate. The tool bit assembly is connected to the other end of the tool handle assembly and comprises a tool bit body and a plurality of blades rotationally arranged on the tool bit body, the blades are distributed at intervals along the peripheral face of the tool bit body, any blade is a cylindrical blade, a first included angle is formed between the rotation axis of any blade and the rotation axis of the main shaft, and the first included angle is smaller than 90 degrees. The end, away from the cutter handle assembly, of the cutter head body is further provided with installation grooves for one-to-one corresponding installation of the blades, any installation groove extends in the direction away from the cutter handle assembly, the extending direction of the installation groove and the rotating axis of the main shaft form a second included angle, and the second included angle and the first included angle complement each other. The front and back surfaces of the blade can be used as cutting surfaces, so that the abrasion is uniform, the cutting temperature is reduced, the service life is prolonged, the use cost is reduced, and the machining efficiency of a machine tool is improved.

Description

TECHNICAL FIELD

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

[0002] In metal processing, the excess metal blank material needs to be removed, and the tool with fixed locking blade is generally used for rough machining. In the prior art, the tool with blade is locked and fixed by screw cutting, which has the following shortcomings: the blade can only be fixed for cutting, the wear is fast, the heat is concentrated at the cutting point, the temperature of the blade is high, the heat dissipation is slow, the service life of the blade is shortened, manual intervention is needed frequently to stop and replace the blade to ensure normal cutting of the tool, which inevitably leads to low efficiency, and if the blade wear is not found in time, the tool will be scrapped, and in severe cases, the workpiece will be overcut. In addition, the structure of the blade in the metal processing tool in the prior art is mostly conical (i.e. one side has a large outer diameter and the other side has a small outer diameter), which can only be used on one side (i.e. the side with a large outer diameter) during use. However, any blade has a limited service life and a limited number of uses, and once the cutting surface is damaged, a new blade needs to be replaced, which undoubtedly increases the use cost of the tool. Therefore, the utility model comes into being. SUMMARY

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

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

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

[0006] A shank assembly, one end of which is adapted to be connected with a main shaft, the main shaft being driven to rotate to drive the shank assembly to rotate around its axis;

[0007] A tool head assembly connected to the other end of the shank assembly, the tool head assembly comprising a tool head main body connected with the shank assembly and a plurality of blades rotatably arranged on the end of the tool head main body away from the shank assembly, the plurality of blades being spaced apart along the outer circumferential surface of the tool head main body, any of the blades being a cylindrical blade, the rotational axis of any of the blades forming a first included angle with the rotational axis of the main shaft, the first included angle being less than 90°, and the end of the tool head main body away from the shank assembly further comprising a mounting groove for mounting the blades one by one, any of the mounting grooves extending in a direction away from the shank assembly and its extension direction forming a second included angle with the rotational axis of the main shaft, the second included angle being complementary to the first included angle.

[0008] Preferably, the tool head body comprises a cylindrical body and a first end portion and a second end portion respectively formed at axial two ends of the body;

[0009] The first end portion is formed with a first connecting portion, and the tool handle assembly is provided with a second connecting portion matched with the first connecting portion;

[0010] The second end portion gradually increases in outer diameter in a direction away from the body, a plurality of mounting grooves are recessed radially inward and uniformly spaced circumferentially on the outer peripheral surface of one end of the second end portion away from the first end portion, and any mounting groove extends through the end surface of the second end portion opposite to the first end portion.

[0011] Preferably, a connecting hole extending through one of the inner side walls of the two adjacent mounting grooves in the direction of one of them is formed between any two adjacent mounting grooves, and the extending directions of all connecting holes are consistent, a connecting shaft is rotatably arranged in any connecting hole, and a tool bit is rotatably arranged on one end of any connecting shaft extending into the corresponding mounting groove.

[0012] Preferably, the first connecting portion is a screw, and the second connecting portion is a threaded connecting groove.

[0013] Preferably, the tool handle assembly comprises a cylindrical tool handle body whose axis is parallel to the rotation axis of the main shaft, and a first connecting end portion whose outer diameter is larger than that of the tool handle body is formed at one axial end of the tool handle body, and a second connecting end portion is implemented at the other axial end of the tool handle body, the threaded connecting groove is formed in the second connecting end portion and extends in the direction of the first connecting end portion along the axis of the tool handle body;

[0014] An avoiding groove extending in the direction of the second connecting end portion along the axis of the tool head body is formed in the middle of the first connecting end portion, a locking assembly for connecting and fixing the tool handle assembly with the main shaft is arranged in the avoiding groove, the locking assembly can be driven to switch between the groove bottom and the groove opening, and when the locking assembly is close to the groove opening of the avoiding groove, the locking assembly abuts against the tool handle assembly to lock the tool handle assembly with the main shaft.

[0015] Preferably, the avoiding groove comprises a first cylindrical groove section, a tapered groove section, a second cylindrical groove section and a third cylindrical groove section arranged in sequence from the groove opening to the groove bottom, and the diameters of the first cylindrical groove section and the third cylindrical groove section are smaller than that of the second cylindrical groove section.

[0016] When the locking assembly is in the locking position, the outer peripheral surface of the locking assembly abuts against the inner peripheral surface of the tapered groove section.

[0017] Preferably, the locking assembly comprises a pull rod and a sleeve coaxial with the main shaft and sleeved together, and a locking piece arranged in a gap between the pull rod and the sleeve;

[0018] The pull rod comprises a cylindrical rod body and a driving portion in a conical shape with an outer diameter larger than that of the rod body, the driving portion is located in the avoiding groove, and an end of the rod body away from the driving portion is connected with a driving cylinder arranged at an end of the main shaft away from the shank assembly;

[0019] An end of the locking piece located in the avoiding groove is provided with a plurality of locking portions extending outward in a slanting manner and capable of being pressed outward to expand outward in a force receiving manner in a circumferential direction thereof;

[0020] The pull rod is driven by the driving cylinder to displace in a direction away from the shank assembly, so that the driving portion presses all the locking portions to make all the locking portions expand outward to abut on the inner wall surface of the conical groove segment, and the locking assembly is switched to a locking state.

[0021] Preferably, the locking piece is composed of a plurality of locking pieces arranged in a circumferential direction of the inner wall of the sleeve, and any locking piece comprises the locking portion and a locking main body portion in an arc piece shape matched with the inner wall of the sleeve and the outer peripheral wall of the pull rod.

[0022] Preferably, the main shaft is provided with a through hole penetrating along the rotation axis thereof for the locking assembly to pass through, and two driving keys opposite to each other and extending in a direction from an end of the through hole away from the shank assembly to an end of the through hole close to the shank assembly are arranged on the inner peripheral wall of the through hole;

[0023] The first connecting end portion is provided with two driving grooves opposite to each other and recessed and extending in a direction of the axis of the shank body on an end face of the main shaft, and the two driving keys are correspondingly clamped into the two driving grooves when the locking assembly is in the locking position.

[0024] Preferably, a positioning groove recessed inward in a radial direction of the outer peripheral wall surface of the first connecting end portion is arranged on each side of the outer peripheral wall surface.

[0025] Compared with the prior art, the utility model has the advantages that:

[0026] The utility model discloses a blade self-rotating machining tool, and the front and back surfaces of the blade can be used as cutting surfaces, can be uniformly abraded, reduce the cutting temperature of the blade, prolong the service life of the tool, and simultaneously, the blade can be used on both sides, which is favorable for reducing the use cost and improving the machining efficiency of the machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model will be further described in connection with the drawings and embodiments:

[0028] Figure 1 The structure diagram of the blade self-rotating machining cutter and the main shaft cooperation of the utility model embodiment is shown in the figure.

[0029] Figure 2 The exploded view of the blade self-rotating machining cutter and the main shaft cooperation of the utility model embodiment is shown in the figure. Figure 1

[0030] Figure 3 The axial section view of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure. Figure 1

[0031] Figure 4 The perspective view of the shank assembly of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0032] Figure 5 The axial section view of the shank assembly of the utility model embodiment is shown in the figure. Figure 4

[0033] Figure 6 The structure diagram of the head main body of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0034] Figure 7 The axial section view of the locking assembly of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0035] Figure 8 The structure diagram of any locking piece of the locking assembly of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0036] Figure 9 The axial section view of the main shaft is shown in the figure.

[0037] Figure 10 The structure diagram of the head of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0038] Figure 11 The angle diagram of the rotation axis L1 of the main shaft, the rotation axis L2 of the blade and the extension direction L3 of the installation slot of the blade self-rotating machining cutter of the utility model embodiment is shown in the figure.

[0039] ​​​Wherein: 100, handle assembly; 110, handle main body; 120, first connecting end; 121, avoiding slot; 1211, first cylindrical slot section; 1212, tapered slot section; 1213, second cylindrical slot section; 1214, third cylindrical slot section; 122, driving slot; 123, limiting flange; 124, positioning slot; 130, second connecting end; 131, second connecting part; 200, tool bit assembly; 210, tool bit main body; 211, main body; 212, first end; 2121, first connecting part; 213, second end; 2131, mounting slot; 2132, connecting hole; 220, blade; 221, connecting shaft; 2210, cutting edge area; 300, locking assembly; 310, sleeve; 320, pull rod; 321, rod body; 322, driving part; 330, locking piece; 331, locking main body part; 332, locking part; 400, main shaft; 410, through hole; 420, driving key. DETAILED DESCRIPTION

[0040] To make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model is further described in detail below in combination with specific embodiments 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 known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0041] The utility model embodiment of a kind of blade self-rotating machining tool, see Figures 1 to 11 , mainly including handle assembly 100 and tool bit assembly 200 two parts. Handle assembly 100 one end is connected together with main shaft 400 and is rotated by the rotation drive of main shaft 400 and rotates together with main shaft 400 rotation axis also namely. Main shaft 400 is connected with external driving mechanism (not shown) such as motor etc. Tool bit assembly 200 is installed on the other end of handle assembly 100, and tool bit assembly 200 includes tool bit main body 210 and a plurality of can rotate relative to tool bit main body 210 blade 220. The innovation point of this embodiment is mainly to improve and optimize the structure of blade 220 and the mounting structure of blade 220 in tool bit main body 210. Specifically, Figure 10As shown, the blade 220 in the embodiment is a cylindrical blade 220, that is, the outer circumferential surface of the blade 220 has a uniform outer diameter along the axial direction, which is different from the structure of the frustum-shaped blade in the prior art, which only uses the end face of the end with a larger outer diameter as the cutting face in use, and the end face of the end with a smaller outer diameter cannot achieve cutting. Since the outer diameter of the blade 220 in the embodiment is uniform along the axial direction of the outer circumferential surface, the front and back faces of the axial two ends of the blade 220 can be used as cutting faces, that is, the axial two ends of the blade 220 have cutting edges that can perform cutting operations, which can be uniformly worn, reduce the cutting temperature of the blade 220, and thus greatly improve the service life of the blade 220, enabling long-term continuous cutting. Since both sides of the blade 220 can be used, it is beneficial to reduce the use cost. In order to realize the installation of the blade 220 and the effective use of the blade 220, the mounting structure of the blade 220 on the tool bit main body 210 is also improved in the embodiment. The frustum-shaped blade in the prior art has a mounting groove extending downward along the rotation axis of the main shaft on the outer circumferential surface of the tool bit main body, that is, the extension direction of the mounting groove is substantially parallel to the rotation axis of the main shaft, and the rotation axis of the blade is perpendicular to the rotation axis of the main shaft. However, such a mounting structure is not suitable for the installation of the blade 220 in the embodiment, such as Figure 6 and Figure 11 As shown, the extension direction of the mounting groove 2131 of any blade 220 on the tool bit main body 210 in the embodiment extends away from the tool shank assembly 100 and forms a second included angle (β angle shown in the figure) with the rotation axis L1 of the main shaft 400, and the rotation axis L2 of the blade 220 is arranged at a first angle (α angle shown in the figure) with the rotation axis L1 of the main shaft 400. In the embodiment, the first included angle α and the second included angle β are both less than 90°, and the first included angle α and the second included angle β are complementary. Specifically, the second included angle β can be selected to be 16-25°, such as 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°. In a preferred embodiment, the second included angle β is 20°. Such a design can ensure that the blade 220 has good cutting effect and is beneficial to improve the service life of the blade 220.

[0042] Specifically, as shown in Figure 6 The tool bit main body 210 includes a body 211 and first and second end portions 212 and 213. The body 211 is a cylindrical column. The first and second end portions 212 and 213 are respectively formed at the axial two ends of the body 211, that is, Figure 3The upper end shown is the end close to or connected with the shank assembly 100, and the lower end is the end away from the shank assembly 100. In order to realize the connection of the first end portion 212 with the shank assembly 100, as shown in Figure 6 A first connecting portion 2121 is formed on the first end portion 212, and correspondingly, as shown in Figure 5 A second connecting portion 131 matched with the first connecting portion 2121 is arranged on the end of the shank assembly 100 connected with the first connecting portion 2121, that is, the head assembly 200 and the shank assembly 100 are connected through the first connecting portion 2121 and the second connecting portion 131. Preferably, the first connecting portion 2121 is a screw with external threads formed on the outer surface thereof extending towards the direction away from the second end portion 213, and the second connecting portion 131 is a threaded connecting groove with internal threads formed on the inner circumferential surface thereof. The threaded connection is realized through the screw and the threaded connecting groove, which is simple in structure and convenient to process. It should be noted that actually the first connecting portion 2121 has two sections, one section has threads and the other section has no threads, and similarly, the threaded connecting groove also has two sections, one section has threads and the other section has no threads (the section without threads has the same function as the positioning column), and the length of the threaded section of the first connecting portion 2121 and the threaded connecting groove is greater than the length of the section without threads, which is not limited in specific, and for example, the length of the threaded section is 3-5 times the length of the section without threads, so that the connection can be ensured to be reliable. In addition, before use, it is necessary to check to ensure that the connection between the two is reliable, and if necessary, it is replaced to avoid separation during use to affect the processing efficiency or even cause injury. As an alternative embodiment, the first connecting portion 2121 can be a threaded connecting groove with internal threads and the second connecting portion 131 can be a screw with external threads. As shown in Figure 6 The outer diameter of the second end portion 213 is greater than the outer diameter of the body 211, and the outer diameter of the second end portion 213 gradually increases from the direction away from the body 211 or the first end portion 212, for example, the second end portion 213 is a frustum, the outer diameter of the end connected with the body 211 is small, and the outer diameter of the end away from the body 211 is large, a plurality of installation grooves 2131 are arranged at intervals (preferably uniformly) along the outer circumferential surface of the end of the second end portion 213 away from the body 211 or the first end portion 212, and a plurality of blades 220 are rotatably installed in the plurality of installation grooves 2131 one by one through connecting shafts 221 (the cooperation gap between the blade 220 and the installation groove 2131 is 0.03-0.06 mm). For the connecting shaft 221, an existing pin screw can be selected, and specifically, one end thereof, that is, the left end as shown in Figure 10 is rotationally connected with the blade 220 (the end is implemented as a smooth cooperation surface on the outer circumferential surface, and the cooperation gap between the cooperation surface and the connecting hole 2132 in the middle of the blade 220 is 0.02 mm), and the other end, that is, the right end as shown in Figure 10The right end outer peripheral surface is provided with a fine tooth external thread and is threadedly fixedly connected with a connecting hole 2132 extending through one of the inner side walls between any two adjacent mounting grooves 2131. The extension directions of all the connecting holes 2132 are consistent, that is, as shown in the example, the extension directions of all the connecting holes 2132 are along the clockwise direction. Figure 1 In order to facilitate the mounting of the connecting shaft 221 and the connecting hole 2132, the end surface of the end of the connecting shaft 221 provided with the external thread, that is, the right end surface of the connecting shaft 221 as shown, is provided with a keyhole. Figure 10 In order to facilitate the mounting of the connecting shaft 221 and the connecting hole 2132, the end surface of the end of the connecting shaft 221 provided with the external thread, that is, the right end surface of the connecting shaft 221 as shown, is provided with a keyhole. Figure 10 As shown, the axial end surfaces of the blade 220 in the embodiment are both provided with cutting edges arranged along the respective end surface circumferential direction, the entire cutting edge participates in cutting, the wear is uniform, the heat dissipation is uniform, the cutting time is more durable, the machine tool processing efficiency is improved, and in the embodiment, the cutting edge region 2210 is obliquely arranged, and as for the oblique angle, the embodiment preferably is 15°-20°, such as 15°, 16°, 17°, 18°, 19°, or 20°.

[0043] For the main shaft 400, as shown in Figures 1 to 3 and Figure 9 , it is a cylindrical structural member. In order to realize the connection of the main shaft 400 and the tool shank assembly 100, a through hole 410 extending along the rotation axis direction of the main shaft 400 is provided in the middle of the main shaft 400, and a driving key 420 extending along the radial direction to the axis and extending along the axial direction from the direction away from the tool shank assembly 100 to the direction close to the tool shank assembly 100 is symmetrically provided on the inner wall of the through hole 410. During installation, the end of the tool shank assembly 100 towards the main shaft 400 is inserted into the through hole 410 and combined with the driving key 420.

[0044] For the tool shank assembly 100, as shown in Figures 2 to 5 , the tool shank assembly 100 includes a tool shank body 110, a first connecting end 120, and a second connecting end 130. The tool shank body 110 is a cylindrical structural member and the axis is parallel to the rotation axis of the main shaft 400. The first connecting end 120 and the second connecting end 130 are respectively arranged at the axial two ends of the tool shank body 110, that is, as shown in Figure 5the second connecting end portion 130 is the axial lower end of the shank body 110, and the second connecting portion 131 is recessed upward along the axial direction of the shank body 110 or the rotation axis direction of the main shaft 400 toward the first connecting end portion 120, that is, extends upward as shown in Figure 5 The first connecting end portion 120 is a reverse T-shaped structure integrally formed at the axial upper end of the shank body 110, that is, the upper end has a small outer diameter and the lower end has a large outer diameter. The upper end with the small outer diameter matches the through hole 410 of the main shaft 400, and the lower end with the large outer diameter is implemented as a limiting flange 123 with a diameter larger than the diameter of the through hole 410, so that when the shank assembly 100 is assembled with the through hole 410 of the main shaft 400, the end surface of the limiting flange 123 can abut against the end surface of the end of the main shaft 400 facing the shank assembly 100, thereby playing a role of limiting during assembly. The first connecting end portion 120 is assembled and matched with the through hole 410 of the main shaft 400 and the driving key 420. In order to realize the assembly and matching of the first connecting end portion 120 and the driving key 420, the left and right sides of the upper end surface of the first connecting end portion 120, that is, the upper end surface shown in Figure 5 When the shank assembly 100 is assembled with the main shaft 400, the first connecting end portion 120 is inserted into the through hole 410 of the main shaft 400, and the two driving keys 420 on the inner wall of the through hole 410 of the main shaft 400 are correspondingly clamped into the two driving grooves 122 on the first connecting end portion 120, which can prevent the shank assembly 100 from being displaced in the circumferential direction relative to the main shaft 400. In order to further improve the connection reliability of the shank assembly 100 and the main shaft 400, that is, to limit the axial displacement between the shank assembly 100 and the main shaft 400, a locking assembly 300 is additionally arranged between the shank assembly 100 and the main shaft 400. The locking assembly 300 is located in the through hole 410 of the main shaft 400. In order to realize the connection of the locking assembly 300 and the shank assembly 100, an avoiding groove 121 recessed toward the shank body 110 or the second connecting end portion 130 along the axial direction of the shank body 110 or the rotation axis direction of the main shaft 400 is arranged at the middle position of the first connecting end portion 120. One end of the locking assembly 300, that is, the lower end shown in Figure 3 The other end of the locking assembly 300, that is, the upper end shown inFigure 3 The upper end of the device extends beyond the upper end of the through hole 410 of the spindle 400 and is connected to a drive component, such as a drive cylinder, located on the upper end of the spindle 400. The locking assembly 300 switches between the bottom and the opening of the clearance groove 121 via the drive cylinder (not shown).

[0045] The clearance groove 121 is not a blind hole with a uniform inner diameter and shape throughout. Specifically, as shown... Figure 5 As shown, the groove has multiple aperture segments along its direction from the opening to the bottom, more specifically, including a first cylindrical groove segment 1211, a conical groove segment 1212, a second cylindrical groove segment 1213, and a third cylindrical groove segment 1214 arranged sequentially. Specifically, the inner diameters of the first cylindrical groove segment 1211 and the third cylindrical groove segment 1214 are both smaller than the inner diameter of the second cylindrical groove segment 1213. The inner diameters of the first cylindrical groove segment 1211 and the third cylindrical groove segment 1214 are not limited and are approximately the same in this embodiment. Regarding the diameter of the conical groove segment 1212, the diameter of the smaller diameter end is the same as that of the first cylindrical groove segment 1211, and the diameter of the larger diameter end is the same as that of the second cylindrical groove segment 1213. The connection between the second cylindrical groove segment 1213 and the third cylindrical groove segment 1214 is rounded, and the bottom of the third cylindrical groove segment 1214 is also rounded. The inner wall surface of the tapered groove section 1212 serves as the locking surface. That is, when the locking assembly 300 is in the locked position, it abuts against the inner wall of the tapered groove section 1212. Since the inner diameter of the tapered groove section 1212 gradually decreases along the direction towards the opening of the relief groove 121, the locking assembly 300 is blocked by the inner wall surface of the tapered groove section 1212, preventing it from moving outwards and fixing itself to the tool holder assembly 100, thus restricting the axial movement of the tool holder assembly 100 and the spindle 400. The locking assembly 300 consists of three parts: a pull rod 320 and a sleeve 310 coaxially sleeved together, and a locking element 330 located in the gap between the pull rod 320 and the sleeve 310. The pull rod 320 includes a cylindrical rod body 321 and a locking element formed at one axial end of the rod body 321. Figure 7 The lower end of the shown cone-shaped drive portion 322. The sleeve 310 is a hollow tube with the same diameter throughout, and its outer diameter matches the diameter of the through hole 410 (referring to the distance between the two drive keys 420), meaning the outer wall of the sleeve 310 slides against the inner wall of the two drive keys 420. For the locking member 330, in this embodiment, preferably, as... Figure 7 and 8 As shown, it includes multiple locking plates spaced apart along the outer periphery of the rod body 321 of the pull rod 320 and the inner periphery of the sleeve 310. For the structure of any one locking plate, as... Figure 8As shown, the locking piece 330 includes a locking body portion 331 and a locking portion 332, wherein the locking body portion 331 is in the shape of a circular arc piece matching the outer peripheral wall of the rod body 321 and the inner peripheral wall of the sleeve 310, and the locking portion 332 is in a tapered structure with a small upper end and a large lower end, i.e., the locking portion 332 extends outwardly and downwardly. In the initial state or position, the driving portion 322 of the pull rod 320 is in the second cylindrical groove section 1213, at this time, the driving portion 322 of the pull rod 320 does not exert an expansion force on the locking portion 332 of the locking piece, i.e., the tool holder assembly 100 is not locked, and can move axially relative to the main shaft 400. When the driving portion 322 of the pull rod 320 moves upward, it will press against the inner walls of all the locking portions 332 of the locking piece 330, so that the plurality of locking pieces expand outwardly and tightly abut against or against the inner wall of the tapered groove section 1212, so that the locking assembly 300 is firmly engaged with the tool holder assembly 100, and the locking assembly 300 switches to the locked state. As an alternative embodiment, the locking piece can also include a locking body portion 331 which is a pipe body with an outer diameter matched with the rod body 321 of the pull rod 320, and a plurality of locking portions 332 are uniformly distributed along the axial lower end of the pipe body of the locking body portion 331. The locking portions 332 shrink together when not subjected to the extrusion force of the driving portion 322, and expand outwardly to abut against the inner wall of the tapered groove section 1212 when subjected to the extrusion force of the driving portion 322, thereby achieving the effect of locking the tool holder assembly 100 and preventing its axial movement.

[0046] The outer peripheral wall of the first connecting end portion 120 of the tool holder body 110 of the embodiment is provided with two radially inwardly recessed grooves symmetrically on both sides, which are implemented as positioning grooves 124 for ATC mechanical arm jaw positioning connection when the tool is positioned. The shape of the positioning grooves 124 is not specifically described and limited, and can be selected and designed according to the shape of the mechanical arm jaw.

[0047] The machining tool of the embodiment, the machining principle is that the main shaft 400 is driven to rotate to drive the tool holder assembly 100 and the tool head body 210 to rotate together around the rotation axis of the main shaft 400, and the cutting force drives the blade 220 to rotate around the axis of the connecting shaft 221 to cut, so that the blade 220 can cut at any point, wear uniformly, process for a long time, heat evenly, cut for a longer time, and improve the machining efficiency of the machine tool.

[0048] 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 self-rotating machining tool, characterized in that, include: A tool holder assembly, one end of which is adapted to be connected to a spindle, the spindle being driven to rotate to cause the tool holder assembly to rotate about its axis; A cutting head assembly is connected to the other end of the handle assembly. The cutting head assembly includes a cutting head body connected to the handle assembly and a plurality of blades rotatably disposed on the end of the cutting head body away from the handle assembly. The plurality of blades are spaced apart along the outer circumferential surface of the cutting head body. Each blade is a cylindrical blade and the rotation axis of each blade forms a first angle with the rotation axis of the spindle. The first angle is less than 90°. The end of the cutting head body away from the handle assembly is also provided with mounting grooves for mounting the blades one by one. Each mounting groove extends in a direction away from the handle assembly and its extension direction forms a second angle with the rotation axis of the spindle. The second angle is complementary to the first angle.

2. The self-rotating machining tool according to claim 1, characterized in that, The cutter head body includes a columnar body and a first end and a second end respectively formed at both axial ends of the body; A first connecting portion is formed on the first end, and a second connecting portion that matches the first connecting portion is provided on the tool holder assembly; The outer diameter of the second end gradually increases in the direction away from the body. A plurality of mounting grooves are recessed radially inward and are evenly distributed circumferentially on the outer peripheral surface of the second end away from the first end. Any of the mounting grooves extends and penetrates the end face of the second end opposite to the first end.

3. The self-rotating machining tool according to claim 2, characterized in that, Between any two adjacent mounting slots, there is a connecting hole extending toward one of the two directions and penetrating one of the inner sidewalls of the mounting slot, and all connecting holes extend in the same direction. A connecting shaft is rotatably provided in any of the connecting holes, and a blade is rotatably provided on one end of any of the connecting shafts extending into its corresponding mounting slot.

4. The self-rotating machining tool according to claim 3, characterized in that, The first connecting part is a screw, and the second connecting part is a threaded connecting groove.

5. The self-rotating machining tool according to claim 4, characterized in that, The tool holder assembly includes a cylindrical tool holder body with its axis parallel to the rotation axis of the main shaft and a first connecting end formed at one axial end of the tool holder body with an outer diameter larger than the outer diameter of the tool holder body. The other axial end of the tool holder body is a second connecting end. A threaded connecting groove is formed in the second connecting end and extends toward the first connecting end along the axial direction of the tool holder body. A clearance groove is provided in the middle of the first connecting end, extending along the axis of the cutter head body toward the second connecting end. A locking component is provided in the clearance groove for connecting and fixing the cutter handle assembly to the spindle. The locking component can be driven to switch between the bottom and the opening of the clearance groove. When it is near the opening of the clearance groove, the locking component abuts against the cutter handle assembly to lock the cutter handle assembly to the spindle.

6. The self-rotating machining tool according to claim 5, characterized in that, The clearance groove includes a first cylindrical groove segment, a conical groove segment, a second cylindrical groove segment, and a third cylindrical groove segment that are connected in sequence along the direction from the groove opening to the groove bottom. The diameters of the first cylindrical groove segment and the third cylindrical groove segment are both smaller than those of the second cylindrical groove segment. When the locking assembly is in the locked position, the outer peripheral surface of the locking assembly abuts against the inner peripheral surface of the tapered groove section.

7. The self-rotating machining tool according to claim 6, characterized in that, The locking assembly includes a pull rod and a sleeve that are coaxial with the main shaft and sleeved together, and a locking element disposed in the gap between the pull rod and the sleeve; The pull rod includes a cylindrical rod body and a tapered drive part with an outer diameter larger than the rod body. The drive part is located in the clearance groove and the end of the rod body away from the drive part is connected to a drive cylinder located at the end of the spindle away from the tool holder assembly. The locking member has multiple outwardly inclined locking parts at intervals along its circumference at one end located in the relief groove, which can expand outward under pressure. The pull rod is driven by the drive cylinder to move away from the tool holder assembly, so that the drive part squeezes all the locking parts and causes all the locking parts to expand outward to abut against the inner wall surface of the tapered groove section, switching the locking assembly to the locked state.

8. The self-rotating machining tool according to claim 7, characterized in that, The locking component consists of a plurality of locking pieces spaced circumferentially along the inner circumferential wall of the sleeve. Each locking piece includes a locking part and an arc-shaped locking body part that fits against the inner wall of the sleeve and the outer circumferential wall of the pull rod.

9. The self-rotating machining tool according to claim 7 or 8, characterized in that, The main shaft has a through hole that runs along its rotation axis for the locking assembly to pass through. On the inner peripheral wall of the through hole, there are two opposing and spaced-apart drive keys that extend from the end of the through hole away from the tool holder assembly toward the end closer to the tool holder assembly. The first connecting end has two opposing drive grooves that extend recessed along the axis of the tool holder body on its end face facing the spindle. When the locking assembly is in the locked position, the two drive keys are engaged into the two drive grooves one by one.

10. The self-rotating machining tool according to claim 5, characterized in that, On each side of the outer peripheral wall of the first connecting end, there is a positioning groove that is recessed inward along its radial direction.

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