Turning tool and machine tool

Abstract

The utility model provides a turning tool and a machine tool. The turning tool comprises a tool bit, a tool bar vibration transmission part, a transducer and a connecting part which are sequentially arranged from front to back, the connecting part is arranged on one side of the tool bar vibration transmission part, the connecting part is used for being connected with a machine tool, and the tool bar vibration transmission part is used for transmitting vibration generated by the transducer to the tool bit. The center line of the cutter bar vibration transmission part is parallel to or coincides with the axis of the transducer, the front end of the connecting part is connected with the cutter bar vibration transmission part at the first position of the cutter bar vibration transmission part, and the angle alpha, 0 degree lt is formed between the connecting part and the part, located behind the first position, of the cutter bar vibration transmission part; a < lt >; and the first position is a node of the vibration transmission part of the cutter bar. The connecting part extends out of the first position of the tool bar vibration transmission part to be connected with the lathe, the overhanging length of the lathe tool is changed into the distance between the first position and the tool bit, and then the overhanging length of the lathe tool is shortened.

Description

Technical Field

[0001] This application relates to the technical field of lathe machining, and particularly to a turning tool and a machine tool. Background Art

[0002] In lathe machining, it is often necessary to use vibration turning to machine workpieces. However, the horn of the tool should have sufficient rigidity to avoid the generation of displacement nodes at the working end when the load resistance is large, which affects the normal operation of the vibration system. In order to obtain sufficient rigidity, it may be necessary to increase the radial area of the tool, which may lead to an overly large tool that is prone to interference with other parts of the machine tool (i.e., contacting other parts of the machine tool) during operation. In addition, an overly large tool size also results in a large weight, making tool setting inconvenient, unable to work efficiently for a long time, reducing machining efficiency. At the same time, an overly large tool size also makes it difficult to install the turning tool, requiring separation of tool positions for installation, which is time-consuming and wastes tool positions in the machine tool's tool magazine. Moreover, an overly large tool has a low rotational speed, a long machining time, cannot be speeded up, has a low tool life, and high production costs. Summary of the Utility Model

[0003] In order to overcome at least one of the above-mentioned defects of the prior art, the purpose of this application is to provide a turning tool with a relatively small size that is not easily interfered with by other parts of the machine tool and a machine tool equipped with this turning tool.

[0004] In a first aspect, the present disclosure provides a turning tool, including a tool tip, a tool shank vibration transmission part, a transducer, and a connection part arranged on one side of the tool shank vibration transmission part in sequence from front to back. The connection part is used to connect with the machine tool. The tool shank vibration transmission part is used to transmit the vibration generated by the transducer to the tool tip. The center line of the tool shank vibration transmission part is parallel or coincident with the axis of the transducer. The front end of the connection part is connected to the tool shank vibration transmission part at a first position of the tool shank vibration transmission part. The connection part and the part of the tool shank vibration transmission part behind the first position form an angle a, where 0° < a < 90°. The first position is the node of the tool shank vibration transmission part.

[0005] Optionally, the connection part is connected to the tool shank vibration transmission part at a second position of the tool shank vibration transmission part. The second position is the node of the tool shank vibration transmission part. The first position and the second position are located at different positions of the tool shank vibration transmission part.

[0006] Optionally, it also includes a transducer housing with an opening at the front end and a seal arranged around the outer periphery of the tool rod vibration transmission part and connected to the tool rod vibration transmission part, wherein the seal is entirely or partially located at the node position of the tool rod vibration transmission part; a first mounting surface and a second mounting surface are formed at the front end of the transducer housing, the seal includes a main body and a flange portion, the flange portion surrounds the main body along the circumference of the main body, the rear end of the flange portion abuts against the first mounting surface, the outer side surface of the main body located behind the flange portion abuts against the second mounting surface, and a first elastic seal is provided between the second mounting surface and the main body, wherein the first mounting surface and the second mounting surface are connected to each other and have an angle.

[0007] Optionally, the sealing member is a sealing cover plate, the transducer housing is connected to the sealing cover plate, the sealing cover plate is provided with a tool rod through hole extending along the front-to-back direction, the tool rod vibration transmission part passes through the tool rod through hole from front to back to be connected to the transducer, the inner wall of the tool rod through hole is tightly attached to the tool rod vibration transmission part, and a second elastic sealing member is provided between the inner wall of the tool rod through hole and the tool rod vibration transmission part.

[0008] Optionally, the sealing component is a flange, and the flange is integrally formed with the blade vibration transmission part.

[0009] Optionally, the bottom of the transducer housing is connected to the connecting portion, and a third mounting surface is formed on the bottom of the transducer housing, and the third mounting surface is tightly pressed against the connecting portion.

[0010] Optionally, a partition is further provided in the transducer housing, and the partition is located between the transducer and the connecting portion. The partition, the connecting portion, and the front wall, side wall, and rear wall of the transducer housing together form an isolation cavity, and the isolation cavity is filled with epoxy resin.

[0011] Optionally, the transducer housing is formed with a wire locking hole and a wire channel, and the isolation cavity is provided with a wire threading hole, so that the wire can pass through the wire channel and the wire threading hole and then be connected to the two transducers; the wire channel is connected to the wire locking hole, and a threaded fastener can pass through the wire locking hole to press the wire in the wire channel.

[0012] Optionally, a transducer is included, and the axis of the transducer coincides with the center line of the vibration transmission part of the tool bar; or

[0013] It comprises a plurality of said transducers, which are evenly spaced and distributed on the same circle with the symmetry center of the tool bar vibration transmission part as the center, and the axes of the plurality of said transducers are parallel to the center line of the tool bar vibration transmission part.

[0014] In a second aspect, the present disclosure provides a machine tool, comprising a driving device and a turning tool as described in any embodiment of the first aspect, which is connected to and driven by the driving device.

[0015] Optionally, it includes a wedge-shaped clamping block, a fixing seat is provided on the machine tool, the fixing seat is provided with a mounting groove, the connecting part is installed in the mounting groove, and the wedge-shaped clamping block and the mounting groove are provided with relative fixing holes; a threaded connecting piece passes through the fixing holes in the wedge-shaped clamping block and the mounting groove in sequence to connect the wedge-shaped clamping block and the mounting groove; the wedge-shaped clamping block and the mounting groove clamp the connecting part from the side of the connecting part.

[0016] In a certain embodiment of the present disclosure, a turning tool extends a connecting portion at the first position of the tool bar vibration transmission portion to connect to a lathe, so that the overhang length of the turning tool becomes the distance between the first position and the tool head, thereby shortening the overhang length of the turning tool, so that the cross-sectional size of the turning tool is controlled within a smaller range while still maintaining a high rigidity. Secondly, since the connecting portion and the portion of the tool bar vibration transmission portion located behind the first position form a certain angle a, the connecting portion extends obliquely from the tool bar vibration transmission portion to connect to the machine tool, thereby further reducing the space occupied by the turning tool. In addition, since the connecting portion is located on one side of the tool bar vibration transmission portion, the connecting portion does not surround the tool bar vibration transmission portion and the transducer like a clamp, which can effectively reduce the space occupied by the turning tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a turning tool in the prior art.

[0018] Figure 2 It is a schematic diagram of the structure of a turning tool in a certain embodiment of the present disclosure.

[0019] Figure 3 for Figure 2 Partial cross-sectional view of the turning tool in .

[0020] Figure 4 for Figure 2 Cross-sectional view of the turning tool in .

[0021] Figure 5 It is a schematic structural diagram of a turning tool in another embodiment of the present invention.

[0022] Figure 6 for Figure 2 Schematic diagram of the partial structure of the turning tool.

[0023] Figure 7 It is a partial cross-sectional view of a part of the structure of a turning tool in a certain embodiment of the present disclosure.

[0024] Figure 8It is an exploded view of a partial structure of a turning tool in a certain embodiment of the present disclosure.

[0025] Fig. 9 It is a schematic diagram of the connection of part of the structure of a turning tool in a certain embodiment of the present disclosure.

[0026] Fig.10 It is a structural schematic diagram of a part of the structure of a turning tool in a certain embodiment of the present disclosure.

[0027] Figure 11-13 Schematic diagram of the partial structure after the turning tool is installed on the lathe at different angles.

[0028] Markings in the figure: 100, turning tool; 110, tool bar; 111, tool bar vibration transmission part; 112, connecting part; 113, screw; 130, tool head; 140, transducer housing; 141, main body; 1411, opening; 142, sealing cover plate; 1421, screw; 1422, tool bar through hole; 1423, main body; 1424, convex edge; 143, isolation cavity; 1431, threading hole; 1441, first elastic sealing member; 1442, second elastic sealing member; 145, power plug; 146, partition; 147, wire locking hole; 148, screw; 149, wire channel; 150, first transducer; 151, first piezoelectric ceramic; 152, second piezoelectric ceramic; 153, third piezoelectric ceramic; 1 54, fourth piezoelectric ceramic; 155, transducer rear cover; 156, screw; 157, insulating tube; 160, second transducer; 161, fifth piezoelectric ceramic; 162, sixth piezoelectric ceramic; 163, seventh piezoelectric ceramic; 164, eighth piezoelectric ceramic; 165, transducer rear cover; 166, screw; 171, second electrode sheet; 172, first electrode sheet; 173, second electrode sheet; 174, first electrode sheet; 175, second electrode sheet; 176, first electrode sheet; 177, second electrode sheet; 178, first electrode sheet; 300, current inflow end; 400, current outflow end; 210, fixing seat; 211, mounting groove; 220, wedge-shaped clamping block; 230, threaded connector; 240, top plate;

[0029] A, first position; B, second position; L1, overhang length of linear turning tool; L2, distance between the first position and the tool head; L3, distance between the transducer and the tool head; Z1, center line of the vibration transmission part of the tool rod; Z2, axis of the first transducer; Z3, axis of the second transducer; M1, first mounting surface; M2, second mounting surface; N, third mounting surface. DETAILED DESCRIPTION

[0030] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0031] In the description of the present application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "far", "near", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] Regarding the design of the turning tool, it should be noted that, in the prior art, the turning tool 100 is generally a linear design, that is, the tool head 130, the tool rod 110, and the transducer of the turning tool 100 are connected in sequence from front to back, and the rear end of the transducer is connected to the lathe. This design will inevitably bring about a problem, that is, the overhang length is too long. Specifically, if Figure 1 As shown, the overhang length of the linear turning tool 100 is L1. It is not difficult to find that Figure 1 The overhang length L1 of the turning tool 100 is too long. It should be noted that the overhang length of the turning tool 100 refers to the length of the cutting part of the turning tool 100 that exceeds the tool holder. As mentioned above, the overall rigidity of the turning tool 100 simply depends on the overhang length of the turning tool 100 and the cross-sectional size of the turning tool 100. When the overhang length of the turning tool 100 is too long, the cross-sectional size of the turning tool 100 has to be increased to ensure the rigidity of the turning tool 100. However, if the cross-sectional size of the turning tool 100 is too large, it will cause a series of problems such as interference with the machine tool as described in the background technology.

[0034] And as Figure 2-4As shown, the turning tool 100 of the present disclosure includes a tool tip 130, a tool shank vibration transmission part 111, a transducer, and a connection part 112 provided on one side of the tool shank vibration transmission part 111, which are arranged in sequence from front to back. The connection part 112 is used to connect to a machine tool. The tool shank vibration transmission part 111 is used to transmit the vibration generated by the transducer to the tool tip 130. The center line Z1 of the tool shank vibration transmission part is parallel or coincident with the axis Z2 of the transducer. The front end of the connection part 112 is connected to the tool shank vibration transmission part 111 at the first position A of the tool shank vibration transmission part 111. The part of the connection part 112 and the tool shank vibration transmission part 111 behind the first position forms an angle a, where 0° < a < 90°. The first position A is at the node of the tool shank vibration transmission part 111. It should be noted that the connection part 112 and the tool shank vibration transmission part 111 are respectively part of the tool shank 110, and the two are combined to form the tool shank 110 in the turning tool of the present disclosure.

[0035] It should be noted that the transducer extends along its axis. Taking one embodiment as an example, refer to Figure 7 , the turning tool includes a first transducer 150 and a second transducer 160. Among them, the axis Z2 of the first transducer, the axis Z3 of the second transducer are parallel to the center line Z1 of the tool shank vibration transmission part.

[0036] Based on the structure of the turning tool 100 of the present disclosure, a connection part 112 is extended at the first position A of the tool shank vibration transmission part 111 to connect to a lathe, so that the overhang length of the turning tool 100 becomes the distance L2 between the first position A and the tool tip 130. And since the distance L2 between the first position A and the tool tip 130 is less than the distance L3 between the transducer and the tool tip 130, the turning tool 100 will have a shorter overhang length than the Figure 1 structure of the turning tool 100 shown. Therefore, the cross-section of the turning tool 100 can be designed into a smaller shape to avoid a series of problems such as interference with the machine tool. In addition, since the part of the connection part 112 and the tool shank vibration transmission part 111 behind the first position forms an angle a, where 0° < a < 90°, the connection part 112 extends obliquely from the tool shank vibration transmission part 111 to connect to the machine tool, so as to further reduce the space occupied by the turning tool.

[0037] In addition, since the connection part 112 is located on one side of the tool shank vibration transmission part 111. Specifically, refer to Figures 2 to 5 , the connection part 112 is located on the lower side of the tool shank vibration transmission part 111. Therefore, the connection part 112 does not surround the tool shank vibration transmission part 111 and the transducer like a fixture, and can effectively reduce the space occupied by the turning tool.

[0038] In some optional embodiments, the cutter head 130 is mounted on the cutter bar vibration transmission part 111 by means of screws 113. It should be noted that there are various ways to mount the cutter head 130 on the cutter bar vibration transmission part 111, including but not limited to welding, gluing, etc., and mounting the cutter head 130 on the cutter bar vibration transmission part 111 by means of screws 113 is only one of the connection methods.

[0039] It should be noted that, in some optional embodiments, the angle between the connecting portion 112 and the blade vibration transmitting portion 111 is greater than 10 degrees and less than 90 degrees.

[0040] It should be noted that the vibration node refers to the intersection node of the vibration mode and the original shape of the structure at a certain order of natural frequency, and the amplitude at the vibration node is the smallest. That is to say, the amplitude of the tool bar vibration transmission part 111 at the first position is the smallest. The purpose of this design is to reduce the influence of the connection part 112 on the vibration transmission of the tool bar vibration transmission part 111. Specifically, since the tool bar vibration transmission part 111 of the present disclosure is connected to the machine tool through the connection part 112, the design of the connection part 112 is likely to affect the vibration and transmission of the tool bar vibration transmission part 111. Therefore, the present disclosure sets one of the connection positions designed with the connection part 112 and the tool bar vibration transmission part 111 at the first position A, thereby reducing the influence of the connection part 112 on the vibration of the tool bar vibration transmission part 111.

[0041] In addition, in order to facilitate the description of the solution of the present disclosure, the present disclosure is Figure 2 and Figure 3 The first direction X and the second direction Y are indicated in the figure, wherein the first direction X is the front-to-back direction, and the second direction Y is the up-down direction. The direction indicated by the arrow in the first direction X is the front, and the direction of the arrow facing away is the back. The direction indicated by the arrow in the second direction Y is the top, and the direction of the arrow facing away is the bottom. Figure 7 The center line Z1 of the tool bar vibration transmission part, the axis Z2 of the first transducer, and the axis Z3 of the second transducer are marked. It is not difficult to see that the center line Z1 of the tool bar vibration transmission part and the axis of the transducer are both parallel to the first direction X.

[0042] In order to obtain a stronger connection strength, in some optional embodiments, the connection portion 112 is connected to the tool bar vibration transmission portion 111 at the second position B of the tool bar vibration transmission portion 111, see Figure 5 At the same time, in order to prevent the connection part 112 from causing greater interference to the vibration of the tool bar vibration transmission part 111, the second position B is the node of the tool bar vibration transmission part 111. It should be noted that for a tool bar vibration transmission part 111, it may have one or more nodes. Figure 5The turning tool 100 shown has two or more nodes. The connection point of the present disclosure is connected to two nodes (the two nodes correspond to the first position and the second position respectively) to strengthen the connection strength between the connection point and the tool bar vibration transmission part 111.

[0043] It should be noted that the connection between the connecting portion 112 and the tool bar vibration transmission portion 111 in the first position A and the second position B is a fixed connection. More specifically, the connecting portion 112 and the tool bar vibration transmission portion 111 are integrally formed. Due to precision machining, the more structural components there are, the greater the error, and the greater the impact on the effect of the machined workpiece. The integrated tool bar disclosed in the present invention not only meets the rigidity requirements, but also has a reduced structural size and can meet the space requirements, while reducing the debugging time, and the precision machining effect will be better.

[0044] In some optional embodiments, the turning tool 100 also includes a transducer housing 140 with an opening 1411 at the front end, and a seal arranged around the periphery of the tool rod vibration transmission part 111 and connected to the tool rod vibration transmission part 111, and the seal is entirely or partially located at the node position of the tool rod vibration transmission part 111; the front end of the transducer housing 140 is formed with a first mounting surface M1 and a second mounting surface M2, and the seal includes a main body 1423 and a flange 1424, the flange 1424 is arranged around the main body 1423 along the circumference of the main body 1423, and the rear end surface of the flange 1424 abuts against the first mounting surface M1 The outer side surface of the main body 1423 located behind the convex edge 1424 is tightly fitted with the second mounting surface M2, so that the transducer housing 140 can compress the seal to prevent the transducer housing from being displaced in the first direction X, and a first elastic seal 1441 is provided between the second mounting surface M2 and the main body 1423, so as to achieve the sealing of the cavity enclosed by the housing, seal, and blade vibration transmission part where the transducer is located, and at the same time reduce the vibration transmission to the transducer housing 140, wherein the first mounting surface M1 and the second mounting surface M2 are interconnected and have an angle, and the second mounting surface M2 is a part of the inner side surface of the transducer housing. Specifically, a groove is provided on the outer side surface of the main body 1424, and the first elastic seal is provided in the groove. It should be noted that the main body 1423 is similar to an annular structure, which is sleeved outside the blade vibration transmission part 111, and the convex edge 1424 is also an annular structure and is located on the outer side of the main body 1423, and is integrally formed with the main body 1423. It should be noted that the main body 1423 is inserted into the opening 1411 of the transducer housing 140 so that the sealing member abuts against the transducer housing 140. In addition, the first elastic sealing member 1441 may be disposed near the opening 1411 of the transducer housing 140.

[0045] Specifically, in some optional embodiments, such as Figure 4As shown, the sealing member is a sealing cover plate 142, the transducer housing 140 is connected to the sealing cover plate, the sealing cover plate 142 is formed with a knife bar through hole 1422, the knife bar through hole 1422 penetrates the sealing cover plate 142 along the first direction X, the knife bar vibration transmission part 111 passes through the knife bar through hole 1422 from front to back to connect with the first transducer 150 and the second transducer 160, and the inner wall of the knife bar through hole 1422 is tightly fitted with the knife bar vibration transmission part 111, so that the sealing cover plate 142 can press the knife bar vibration transmission part 111, so as to be enclosed with the tool rod vibration transmission part and the transducer housing to form a cavity for installing the transducer, and during the vibration transmission process, the sealing cover plate will not be displaced along the first direction X, and a second elastic seal 1442 is provided between the inner wall of the tool rod through hole 1422 and the tool rod vibration transmission part 111. Specifically, a groove is provided on the outer side surface where the tool rod vibration transmission part 111 and the sealing cover plate 142 are tightly fitted, and the second elastic seal is arranged in the groove to further achieve the sealing of the cavity where the transducer is located.

[0046] It should be noted that the first elastic seal 1441 and the second elastic seal 1442 can be rubber seals. Moreover, the rubber seal is only one embodiment of the elastic seal, and other types of elastic seals are also feasible. The above scheme not only realizes the sealing of the sealing cover plate 142 and the blade vibration transmission part 111 and the sealing cover plate and the transducer housing 140 by setting the first elastic seal 1441 and the second elastic seal 1442, but also reduces the vibration between the sealing cover plate 142 and the blade vibration transmission part 111 and the vibration between the sealing cover plate 142 and the transducer housing 140.

[0047] It should be noted that the above content is based on a certain implementation manner in which the turning tool includes a first transducer 150 and a second transducer 160 as an example. In some other implementation manners, the turning tool may include one transducer, three or more transducers, wherein the tool rod vibration transmission part 111 should pass through the tool rod through hole 1422 from front to back to connect with all the transducers.

[0048] In addition, in some optional embodiments, the bottom 140 of the transducer housing is connected to the connecting portion 112 , and a third mounting surface N is formed at the bottom of the transducer housing 140 , and the third mounting surface N is tightly pressed against the connecting portion 112 .

[0049] The advantage of the above design is that the tool bar vibration transmission part 111 and the connecting part 112 are respectively connected to different positions of the transducer housing 140, and the tool bar vibration transmission part 111 and the connecting part 112 are connected at the first position A, so that at least three connection points are formed between the tool bar vibration transmission part 111, the connecting part 112 and the transducer housing 140, thereby improving the stability of the entire turning tool 100. In addition, since the tool head 130, the tool bar vibration transmission part 111 and the transducer are connected in sequence from front to back, the distance spanned from the front end of the tool head 130 to the rear end of the transducer is relatively large. Therefore, in order to make the turning tool 100 more stable during operation, in addition to setting a connection point with the connecting part 112 at the first position A of the tool bar vibration transmission part 111, the present disclosure also provides a certain support force for the linear structure composed of the tool head 130, the tool bar vibration transmission part 111 and the transducer housing 140 through the connection between the connecting part 112 and the transducer housing 140, so as to avoid the linear structure being "top-heavy" or "heavy-footed", thereby affecting the stability of the turning tool 100. The surface contact between the transducer housing 140 and the connecting part 112 allows the connecting part 112 to more stably install and fix the transducer housing 140, thereby providing better support for the transducer housing 140. In addition, due to the design formed by the cooperation between the main body 1423 and the flange 1424, at least two surfaces of contact are formed between the sealing cover 142 and the transducer housing 140, and the two contact surfaces are at an angle of 90 degrees, which further increases the difficulty for debris to pass through the gap between the sealing cover 142 and the transducer housing 140, thereby ensuring the sealing of the transducer housing 140.

[0050] In addition, combined Figure 2 , Figure 3 as well as Figure 6 It can be seen that the tool head 130, the tool bar vibration transmission part 111 and the transducer housing 140 are connected in sequence from front to back, and the connecting part 112 extends downward from front to back. Therefore, it is not difficult to see that the local tool bar vibration transmission part 111, the transducer housing 140 and the connecting part 112 form a structure similar to a triangle, and the connecting part 112 can more stably support the tool bar vibration transmission part 111, the turning tool 100, the transducer and other structures, thereby ensuring the stability of the entire turning tool 100 structure.

[0051] Although, in some optional embodiments, the connecting portion 112 is substantially in a straight line shape, in other optional embodiments, the connecting portion 112 may also be in an arc-shaped structure.

[0052] Furthermore, in some embodiments, Figure 4 As shown, the third mounting surface N on the bottom side of the transducer housing 140 is fixedly connected to the rear end of the connecting portion 112 by means of screws 148 .

[0053] In order to better illustrate the turning tool 100 of the present disclosure, Figure 3 and Figure 4 For explanation. Figure 3 and Figure 4 As shown, the transducer housing 140 is formed with an isolation cavity 143. Specifically, the transducer housing 140 includes a main body 141 and a partition 146, wherein the partition 146 is located between the transducer and the connecting portion 112, and the partition 146, the connecting portion 112 and the main body 141 enclose the isolation cavity 143, wherein the main body 141 includes the front wall, the rear wall and the side wall of the transducer housing 140.

[0054] In the above solution, the partition separates the transducer housing into an isolation cavity and a cavity accommodating the transducer, and the transducer is isolated from the outside world through the isolation cavity 143. In addition, in order to further ensure the isolation effect, the isolation cavity 143 is filled with epoxy resin to prevent external pollution from entering the isolation cavity 143 and affecting the transducer.

[0055] In some optional embodiments, the main body 141 and the sealing cover plate 142 are connected to each other via screws 1421 .

[0056] More specifically, if Figure 7-10 As shown, the transducer includes piezoelectric ceramics, transducer rear covers 155, 165, and bolts. The front end of the piezoelectric ceramics is connected to the rear end of the blade vibration transmission part 111. The connection between the front end of the piezoelectric ceramics and the rear end of the blade vibration transmission part 111 is surrounded by a sealing cover 142 to prevent external contamination from entering the cavity of the transducer housing 140 that accommodates the transducer.

[0057] Continue reading Figure 2-4 A power plug 145 is provided at the rear end of the transducer housing 140. The power plug 145 is connected to the transducer through a wire. A threading hole 1431 is formed in the isolation cavity 143 for the wire to pass through the isolation cavity 143 from the power plug 145 and enter the cavity where the transducer is located, and then connect with the transducer inside the cavity. Therefore, when the power plug 145 is connected to an external power source, power can be transmitted to the transducer through the power plug 145 and the wire.

[0058] It should be noted that, in some optional embodiments, the shape of the threading hole 1431 matches the shape of the wire, so that when the wire passes through the threading hole 1431, the threading hole 1431 is sealed to prevent external pollution from entering the cavity where the transducer is located through the threading hole 1431. In addition, in some optional embodiments, the shape of the threading hole 1431 does not necessarily need to match the wire. In this embodiment, a sealant can be provided at the threading hole 1431 to seal the gap between the threading hole 1431 and the wire, thereby also preventing external pollution from entering the cavity where the transducer is located through the threading hole 1431.

[0059] In addition, a wire channel 149 may be provided at the connection between the transducer housing 140 and the power plug 145, so that the wire extending from the power plug 145 can smoothly enter the transducer housing 140. In addition, a wire locking hole 147 is formed on the side of the transducer housing 140, and the wire channel 149 is connected to the wire locking hole 147. The screw located outside the transducer housing 140 passes through the wire locking hole to press the wire of the transducer, so as to press and fix the wire of the transducer in the wire channel 149 to prevent the wire from being pulled out or slipping out.

[0060] It should be noted that in some optional embodiments, the seal is a flange, the flange and the tool rod vibration transmission part are integrally formed, the transducer housing 140 is connected to the flange, and the transducer is wrapped by the cooperation of the tool rod vibration transmission part 111, the transducer housing 140 and the flange.

[0061] As for the setting of the transducer, the present disclosure also has multiple schemes. In the first scheme, the turning tool 100 of the present disclosure includes a transducer, and the axis of the transducer coincides with the center line of the tool bar vibration transmission part 111. In the second scheme, the turning tool 100 includes multiple transducers, and the axes of the multiple transducers are evenly spaced on the same circumference with the symmetry center of the tool bar vibration transmission part 111 as the center, and the axes of the multiple transducers are parallel to the symmetry center of the tool bar vibration transmission part 111. Specifically, Figure 3 as well as Figure 7-10 As shown, the turning tool 100 includes a first transducer 150 and a second transducer 160. The axis Z2 of the first transducer 150 and the axis Z3 of the second transducer 160 are parallel to the center line Z1 of the tool bar vibration transmission part 111, and are evenly spaced on the same circumference with the symmetry center of the tool bar vibration transmission part 111 as the center. More specifically, the axis of the tool bar vibration transmission part 111 extends from front to back, and the axis of the first transducer 150 and the axis of the second transducer 160 also extend from front to back, and the axis Z2 of the first transducer 150 and the axis Z3 of the second transducer 160 are respectively located on opposite sides of the tool bar vibration transmission part 111 with the center line Z1 of the tool bar vibration transmission part 111 as the symmetry axis.

[0062] It should be noted that the piezoelectric ceramic is polarized, causing the positive and negative charges of its internal unit cells to not overlap, causing it to stretch or shrink when subjected to an external electric field. When the direction of the external electric field is the same as the polarization direction of the piezoelectric ceramic, the polarization strength of the piezoelectric ceramic will be enhanced, resulting in a piezoelectric effect. At this time, the piezoelectric ceramic will stretch along the polarization direction. When the direction of the external electric field is opposite to the polarization direction of the piezoelectric ceramic, the polarization strength of the piezoelectric ceramic will be weakened, causing the piezoelectric ceramic to shrink along the polarization direction.

[0063] like Figure 7-10As shown, the turning tool 110 in the present disclosure includes a first transducer 150 and a second transducer 160 whose axes are parallel to each other. The tool bar 110 is used to transmit the vibration generated by the first transducer 150 and the second transducer 160 to the tool head 130, and the axis Z2 of the first transducer 150, the axis Z3 of the second transducer 160 and the center line Z1 of the vibration transmission part of the tool bar are parallel to each other; the first transducer 150 and the second transducer 160 are configured to generate vibrations in opposite directions in the axial direction when powered on.

[0064] It should be noted that the vibration in the opposite direction is achieved by extending and shortening the transducer. Specifically, under the action of a certain external electric field, the first transducer 150 is extended along the first direction X, and the second transducer 160 is shortened along the first direction X to generate opposite vibrations. Similarly, the second transducer 160 is extended along the first direction X, and the first transducer 150 is shortened along the first direction X to generate opposite vibrations. The above scheme generates unidirectional parallel opposite vibrations through two transducers, and couples them into bending vibrations, so that the turning tool forms a relatively high-frequency vibration. Moreover, the scheme is relatively easy to implement and low-cost, and there is no need to use overly complex piezoelectric ceramics, and ordinary types of piezoelectric ceramics can meet the requirements.

[0065] Specifically, the first transducer 150 includes multiple piezoelectric ceramics and multiple electrode sheets, and the second transducer 160 also includes multiple piezoelectric ceramics and multiple electrode sheets. The piezoelectric ceramics and electrode sheets in the first transducer 150 are alternately arranged from front to back, and the piezoelectric ceramics and electrode sheets in the second transducer 160 are alternately arranged from front to back, and an electrode sheet is provided between the rear cover plates 155, 165 of the transducer and the piezoelectric ceramics.

[0066] The piezoelectric ceramics of the first transducer 150 and the second transducer 160 are arranged side by side and correspond to each other. The polarization directions of the two piezoelectric ceramics arranged side by side in the first transducer 150 and the second transducer 160 are opposite, and the polarization directions of two adjacent piezoelectric ceramics in the same transducer are opposite.

[0067] More specifically, the first transducer 150 includes a plurality of piezoelectric ceramics arranged from front to back, and the second transducer 160 includes a plurality of piezoelectric ceramics arranged from front to back. The polarization direction of the frontmost piezoelectric ceramic of the first transducer 150 is opposite to that of the frontmost piezoelectric ceramic of the second transducer 160, and the two are respectively arranged side by side on opposite sides of the center line Z1 of the blade vibration transmission part. Similarly, the polarization direction of the second piezoelectric ceramic from the front to the back of the first transducer 150 is opposite to that of the second piezoelectric ceramic from the front to the back of the second transducer 160, and the two are respectively arranged side by side on opposite sides of the center line Z1 of the blade vibration transmission part. By analogy, the piezoelectric ceramics in the first transducer 150 are all polarized opposite to the corresponding piezoelectric ceramics in the second transducer 160, and are arranged side by side on the left and right sides.

[0068] The polarization directions of two adjacent piezoelectric ceramics in the same transducer are opposite, which specifically means that the polarization directions of two adjacent piezoelectric ceramics of the first transducer 150 are opposite, and the polarization directions of two adjacent piezoelectric ceramics of the second transducer 160 are opposite. For the above scheme, since the polarization directions of adjacent piezoelectric ceramics are opposite, the adjacent piezoelectric ceramics can be made thicker or thinner at the same time after being energized by the cooperation of the electrode sheets, and the piezoelectric ceramics are excited to generate longitudinal vibration.

[0069] The advantage of the above arrangement is that, since the polarization directions of the piezoelectric ceramics at corresponding positions in the first transducer 150 and the second transducer 160 are opposite, when the same signal is applied to the pair of piezoelectric ceramics at the same time, the pair of piezoelectric ceramics can produce opposite deformations, thereby causing the first transducer 150 and the second transducer 160 to also produce opposite deformations.

[0070] In addition, the electrode sheet closest to the rear cover plate and the electrode sheet connected in parallel with the electrode sheet in the same transducer is the first electrode sheet, and the remaining electrode sheets are the second electrode sheets. The first electrode sheets of the two transducers are connected in parallel and are used to connect to the current outflow end 400, and the second electrode sheets of the two transducers are connected in parallel and are used to connect to the current inflow end 300.

[0071] In order to better illustrate the above scheme, a certain implementation mode is now used as an example for explanation. Figure 7-10 .like Figure 7-10As shown, a turning tool of a certain embodiment of the present disclosure includes a first transducer 150 and a second transducer 160, wherein the first transducer 150 includes, from front to back, a first piezoelectric ceramic 151, a second electrode sheet 171, a second piezoelectric ceramic 152, a first electrode sheet 172, a third piezoelectric ceramic 153, a second electrode sheet 173, a fourth piezoelectric ceramic 154, and a first electrode sheet 174, and the second transducer 160 includes, from front to back, a fifth piezoelectric ceramic 161, a second electrode sheet 175, a sixth piezoelectric ceramic 162, a first electrode sheet 176, a seventh piezoelectric ceramic 163, a second electrode sheet 177, an eighth piezoelectric ceramic 164, and a first electrode sheet 178. It should be noted that, as Figure 8 As shown, the first electrode sheet 174 is the electrode sheet closest to the rear cover plate 155 in the first transducer, and the first electrode sheet 178 is the electrode sheet closest to the rear cover plate 165 in the second transducer. The first electrode sheet 174 is connected in parallel with the first electrode sheet 172, the first electrode sheet 176 and the first electrode sheet 178, and the second electrode sheet 171 is connected in parallel with the second electrode sheet 173, the second electrode sheet 175 and the second electrode sheet 177.

[0072] Among them, the first piezoelectric ceramic 151 corresponds to the fifth piezoelectric ceramic 161, the second piezoelectric ceramic 152 corresponds to the sixth piezoelectric ceramic 162, the third piezoelectric ceramic 153 corresponds to the seventh piezoelectric ceramic 163, and the fourth piezoelectric ceramic 154 corresponds to the eighth piezoelectric ceramic 164. In addition, the second electrode sheet 171 corresponds to the second electrode sheet 175, the first electrode sheet 172 corresponds to the first electrode sheet 176, the second electrode sheet 173 corresponds to the second electrode sheet 177, and the first electrode sheet 174 corresponds to the first electrode sheet 178.

[0073] In the above scheme, first, since the polarities of adjacent piezoelectric ceramics in the first transducer 150 are opposite, the polarization directions of the first piezoelectric ceramic 151 and the third piezoelectric ceramic 153 are the same, while the polarization directions of the second piezoelectric ceramic 152 and the fourth piezoelectric ceramic 154 are the same, and the polarization direction of the first piezoelectric ceramic 151 should be opposite to that of the second piezoelectric ceramic 152. For example, assuming that the polarization direction of the first piezoelectric ceramic 151 is from front to back, then the polarization direction of the third piezoelectric ceramic 153 is also from front to back, and the polarization direction of the second piezoelectric ceramic 152 and the fourth piezoelectric ceramic 154 should be from back to front. Since the polarization directions of the piezoelectric ceramics corresponding to the first transducer 150 and the second transducer 160 are opposite, the polarization direction of the fifth piezoelectric ceramic 161 should be opposite to that of the first piezoelectric ceramic 151, and the polarization direction of the fifth piezoelectric ceramic 161 should be from back to front. Similarly, it can be known that the polarization direction of the sixth piezoelectric ceramic 162 is from front to back, the polarization direction of the seventh piezoelectric ceramic 163 is from back to front, and the polarization direction of the eighth piezoelectric ceramic 164 is from front to back.

[0074] In addition, since the current inflow end 300 is connected to the second electrode sheet 171, the second electrode sheet 173, the second electrode sheet 175, and the second electrode sheet 177, and the current outflow end 400 is connected to the first electrode sheet 172, the first electrode sheet 174, the first electrode sheet 176, and the first electrode sheet 178, when a high voltage is input to the current inflow end 300 and a low voltage is input to the current outflow end 400, the electrode sheets will apply an electric field to the piezoelectric ceramics therebetween.

[0075] For ease of understanding, this disclosure Fig. 9 The polarization direction of the piezoelectric ceramic and the direction of the applied electric field are marked in the figure. Among them, the solid arrow located inside the piezoelectric ceramic is the polarization direction of the piezoelectric ceramic, and the hollow arrow located on the side of the piezoelectric ceramic is the direction of the applied electric field of the piezoelectric ceramic. It is not difficult to find that the polarization direction of the first piezoelectric ceramic 151 is from front to back, while the direction of the applied electric field of the first piezoelectric ceramic 151 is from back to front, and the polarization direction of the first piezoelectric ceramic 151 is opposite to the direction of the applied electric field. The polarization direction of the second piezoelectric ceramic 152 is from back to front, while the direction of the applied electric field of the second piezoelectric ceramic 152 is from front to back, and the polarization direction of the second piezoelectric ceramic 152 is opposite to the direction of the applied electric field. By analogy, it can be seen that the polarization direction of the third piezoelectric ceramic 153 is opposite to the direction of the applied electric field, and the polarization direction of the fourth piezoelectric ceramic 154 is opposite to the direction of the applied electric field. Therefore, for the first transducer 150 , since the polarization directions of all the piezoelectric ceramics therein are opposite to the direction of the external electric field, the deformations of all the piezoelectric ceramics therein are consistent, and thus the first transducer 150 may present a deformation of shortening along the first direction.

[0076] Similarly, if Fig. 9 As shown, the polarization direction of the fifth piezoelectric ceramic 161 is from back to front, while the direction of the external electric field of the fifth piezoelectric ceramic 161 is from back to front, and the polarization direction of the fifth piezoelectric ceramic 161 is the same as the direction of the external electric field. The polarization direction of the sixth piezoelectric ceramic 162 is from front to back, while the direction of the external electric field of the sixth piezoelectric ceramic 162 is from front to back, and the polarization direction of the sixth piezoelectric ceramic 162 is the same as the direction of the external electric field. By analogy, it can also be known that the polarization direction of the seventh piezoelectric ceramic 163 is the same as the direction of the external electric field, and the polarization direction of the eighth piezoelectric ceramic 164 is the same as the direction of the external electric field. Therefore, for the second transducer 160, the polarization direction of all the piezoelectric ceramics inside it is the same as the direction of the external electric field, and it can present a deformation that is elongated along the first direction.

[0077] In summary, it is not difficult to find that when different voltages are input to the current inflow end 300 and the current outflow end 400 to generate an external electric field, the first transducer 150 and the second transducer 160 will undergo opposite changes in the first direction (one side stretches and the other side shrinks). Therefore, the above scheme can make the first transducer 150 and the second transducer 160 produce opposite deformations along the first direction (that is, one side stretches and the other side shrinks) to form bending vibration by inputting periodically changing signals to the current inflow end 300 and the current outflow end 400.

[0078] It should be noted that Fig. 9 The direction of the applied electric field is based on the situation that a high voltage is input to the current inflow end 300 and a low voltage is input to the current outflow end 400. In other embodiments, if a low voltage is input to the current inflow end 300 and a high voltage is input to the current outflow end 400, the direction of the applied electric field should be opposite. At this time, for the first transducer 150, since the polarization direction of all the piezoelectric ceramics inside it is the same as the direction of the applied electric field, the deformation of all the piezoelectric ceramics inside it is consistent, so the first transducer 150 can present a deformation of elongation along the first direction. Similarly, at this time, the first transducer 160 can present a deformation of shortening along the first direction. In this embodiment, the high voltage is not greater than 36V, or an insulating sheet is provided between the first electrode sheets 174, 178 and the rear cover plate, and an electrode sheet is also provided between the first piezoelectric ceramic 151, the fifth piezoelectric ceramic 161 and the tool rod vibration transmission part, and an insulating sheet is also provided between the electrode sheet and the tool vibration transmission part. In addition, the electrode sheet is the first electrode sheet and is connected in parallel with other first electrode sheets of the same transducer to ensure that each piezoelectric ceramic has longitudinal vibration, and can also ensure electrical safety to avoid electric shock to the human body.

[0079] In order to better explain how the transducer cooperates with other structures to output vibration, the following will combine Figure 7-10 One of the implementations is further described. First, for a single transducer, take the first transducer 150 as an example. Figure 7 and Fig.10As shown, the piezoelectric ceramic, electrode sheet and transducer rear cover plates 155, 165 are abutted in sequence from front to back, and the transducer rear cover plates 155, 165 are pressed against each other by screws 156, 166, so that the transducer rear cover plate 155, the electrode sheet and the piezoelectric ceramic are tightly pressed together. In addition, a space is provided between the middle section of the screw 156 and the piezoelectric ceramic and the electrode sheet, and an insulating tube 157 is also provided. At the same time, the first piezoelectric ceramic 151 at the front of the first transducer 150 is also pressed against the tool bar vibration transmission part (transducer front cover plate) 111. When the piezoelectric ceramic of the first transducer 150 changes (elongates or shortens), the change will be transmitted forward to the cutter head through the tool bar vibration transmission part 111. Similarly, the change of the second transducer 160 can also be transmitted forward to the cutter head through the tool bar vibration transmission part 111. In the present disclosure, since the changes of the first transducer 150 and the second transducer 160 are opposite, one stretches and the other shrinks, the two vibrations can be coupled into bending vibrations, so the first transducer 150 and the second transducer 160 transmit the bending vibrations through the tool rod vibration transmission part 111, and transmit the bending vibrations to the tool head 130 through the tool rod vibration transmission part 111.

[0080] In addition, it should be noted that the blade vibration transmission part 111 and the transducer rear cover plate can be connected by screws. Specifically, the transducer rear cover plate 155 is connected to the blade vibration transmission part 111 by screws 156, and the transducer rear cover plate 165 is connected to the blade vibration transmission part 111 by screws 166.

[0081] The present disclosure also provides a machine tool, including a driving device and a turning tool 100, wherein the driving device is used to drive the turning tool 100 to process a workpiece. Figure 11-13 As shown, the machine tool includes a wedge-shaped clamping block 220, and the tool holder of the machine tool is provided with a fixed seat 210, the fixed seat 210 is provided with a mounting groove 211, the connecting part 112 is installed in the mounting groove 211, and the wedge-shaped clamping block 220 and the mounting groove 211 are provided with relative fixing holes. The threaded connecting piece 230 passes through the fixing holes in the wedge-shaped clamping block 220 and the mounting groove 211 in turn, connects the wedge-shaped clamping block 220 and the mounting groove 211, and clamps the connecting part from the side of the connecting part 112.

[0082] In addition, the cross section of the wedge-shaped clamping block 220 gradually increases from bottom to top, so that when the user loosens the threaded connector 230 and allows the wedge-shaped clamping block 220 to move upward, the wedge-shaped clamping block 220 and the fixing seat 210 can no longer stably clamp the connecting portion 112 of the turning tool 100, and the turning tool 100 can be separated from the fixing seat. Therefore, it is not necessary to completely loosen the threaded connector 230 to separate the threaded connector 230 from the fixing seat 210 before removing the turning tool 100. The threaded connector 230 may be a screw.

[0083] It should be noted that the machine tool itself has many structures, such as the spindle box, workbench and many other structures. These structures will take up a lot of space, resulting in a relatively small space for the turning tool itself to move. Figure 11-13 As shown, the machine tool of the present disclosure also includes a top plate 240, which is located above the turning tool 100. If the cross-sectional area of ​​the turning tool 100 is relatively large, it is possible that the turning tool 100 contacts the top plate 240 when it is moved, so that the machine tool cannot operate normally. The turning tool 100 of the present disclosure extends a connecting portion 112 at the first position of the tool bar vibration transmission portion 111 to be installed on the tool holder of the machine tool, thereby shortening the overhang length of the turning tool 100, so that the cross-sectional area of ​​the tool bar vibration transmission portion 111 becomes smaller, so as to adapt to the machine tool with limited turning tool installation space.

[0084] Secondly, the tool rod vibration transmission part 111, the connecting part 112 and the transducer housing 140 form a triangular structure, so that the connecting part 112 can better support the tool rod vibration transmission part 111, the transducer housing 140 and the turning tool 100, so that the force on the front and rear sides of the entire turning tool 100 is roughly balanced, thereby ensuring the stability of the turning tool 100 during operation.

[0085] Furthermore, the turning tool 100 disclosed in the present invention extends a connection portion 112 at the first position A of the tool bar vibration transmission portion 111 to connect to a lathe, thereby shortening the overhang length of the turning tool and maintaining high rigidity while controlling the cross-sectional size of the turning tool within a smaller range, thereby effectively reducing the space occupied by the turning tool 100.

[0086] In addition, the first transducer 150 and the second transducer 160 of the turning tool disclosed in the present invention are parallel to each other and can form opposite deformations in the longitudinal direction to synthesize bending vibrations, thereby increasing the bending vibration frequency of the turning tool to facilitate rapid turning processing.

[0087] The technical means of this application are not limited to the technical means disclosed in the above-mentioned implementation methods, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of this application.

Claims

1. A turning tool, characterized in that: It includes a tool tip, a tool shank vibration transmission part, a transducer, and a connection part arranged on one side of the tool shank vibration transmission part, which are arranged in sequence from front to back. The connection part is used to connect with a machine tool. The tool shank vibration transmission part is used to transmit the vibration generated by the transducer to the tool tip. The center line of the tool shank vibration transmission part is parallel to or coincides with the axis of the transducer. The front end of the connection part is connected to the tool shank vibration transmission part at a first position of the tool shank vibration transmission part. The connection part and the part of the tool shank vibration transmission part behind the first position form an angle a, where 0° < a < 90°. The first position is the node of the tool shank vibration transmission part.

2. The turning tool according to claim 1, characterized in that: The connection part is connected to the tool shank vibration transmission part at a second position of the tool shank vibration transmission part. The second position is the node of the tool shank vibration transmission part. The first position and the second position are located at different positions of the tool shank vibration transmission part.

3. The turning tool according to claim 1, characterized in that: It further includes a transducer housing with an opening at the front end and a seal arranged around the outer periphery of the tool shank vibration transmission part and connected to the tool shank vibration transmission part. The seal is wholly or partly located at the node position of the tool shank vibration transmission part. The front end of the transducer housing forms a first mounting surface and a second mounting surface. The seal includes a main body part and a convex edge part. The convex edge part surrounds the main body part along the circumferential direction of the main body part. The rear end of the convex edge part abuts against the first mounting surface. The outer side surface of the main body part behind the convex edge part abuts against the second mounting surface. And a first elastic seal is arranged between the second mounting surface and the main body part. Among them, the first mounting surface and the second mounting surface are connected to each other and have an included angle.

4. The turning tool according to claim 3, characterized in that: The seal is a sealing cover plate. The transducer housing is connected to the sealing cover plate. The sealing cover plate is provided with a tool shank through hole penetrating in the front-rear direction. The tool shank vibration transmission part passes through the tool shank through hole from front to back to be connected to the transducer. The inner wall of the tool shank through hole is closely attached to the tool shank vibration transmission part. And a second elastic seal is arranged between the inner wall of the tool shank through hole and the tool shank vibration transmission part.

5. The turning tool according to claim 3, characterized in that: The seal is a flange, and the flange is integrally formed with the tool shank vibration transmission part.

6. The turning tool according to claim 3, characterized in that: The bottom of the transducer housing is connected to the connection part. And the bottom of the transducer housing forms a third mounting surface, and the third mounting surface abuts tightly against the connection part.

7. The turning tool according to claim 3, characterized in that: A partition is further arranged in the transducer housing and is located between the transducer and the connection part. The partition, the connection part, and the front wall, side walls, and rear wall of the transducer housing enclose an isolation cavity, and the isolation cavity is filled with epoxy resin.

8. The turning tool according to claim 7, characterized in that: The transducer housing forms a wire locking hole and a wire channel. The isolation cavity is provided with a wire passing hole so that a wire passes through the wire channel and the wire passing hole and then is connected to the two transducers. The wire channel is communicated with the wire locking hole, and a threaded fastener can pass through the wire locking hole to press the wire in the wire channel.

9. The turning tool according to any one of claims 1-8, wherein It comprises a transducer, the axis of which coincides with the center line of the vibration transmission part of the tool bar; or It comprises a plurality of said transducers, which are evenly spaced and distributed on the same circle with the symmetry center of the tool bar vibration transmission part as the center, and the axes of the plurality of said transducers are parallel to the center line of the tool bar vibration transmission part.

10. A machine tool, characterized in that: The invention comprises a driving device and a turning tool according to any one of claims 1 to 9 which is connected to the driving device and driven by the driving device.

11. The machine tool according to claim 10, characterized in that It comprises a wedge-shaped clamping block, a fixing seat is provided on the machine tool, a mounting groove is provided on the fixing seat, the connecting part is installed in the mounting groove, and relative fixing holes are provided in the wedge-shaped clamping block and the mounting groove; a threaded connecting piece passes through the fixing holes in the wedge-shaped clamping block and the mounting groove in sequence to connect the wedge-shaped clamping block and the mounting groove; the wedge-shaped clamping block and the mounting groove clamp the connecting part from the side of the connecting part.

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