WO2023070818A1

WO2023070818A1 - Ultrasonic cutter handle, cutter clamping structure, machining device, and machine tool

Info

Publication number: WO2023070818A1
Application number: PCT/CN2021/134501
Authority: WO
Inventors: 颜炳姜; 李伟秋; 张国立
Original assignee: 科益展智能装备有限公司; 汇专科技集团股份有限公司; 科益展智能装备有限公司广州分公司
Priority date: 2021-10-27
Filing date: 2021-11-30
Publication date: 2023-05-04
Also published as: CN114161176A

Abstract

Disclosed in the present invention are an ultrasonic cutter handle, a cutter clamping structure, a machining device, and a machine tool. The ultrasonic cutter handle comprises an amplitude transformer and a cutter clamping structure which are sequentially connected to a cutter handle body, wherein the cutter clamping structure comprises a cutter clamping section and a cutter handle connecting section which are connected to each other, and a longitudinal-torsional conversion unit is arranged on an outer peripheral face of the cutter clamping section. Compared with the prior art in which a longitudinal-torsional conversion unit is arranged on an amplitude transformer, the longitudinal-torsional conversion unit in the present application is configured to convert longitudinal vibrations transmitted by the amplitude transformer into composite longitudinal-torsional vibrations, so that one-dimensional machining is converted into two-dimensional machining, the service life of a cutter is further prolonged, the machining efficiency is improved, and the surface roughness of a machined workpiece is improved.

Description

Ultrasonic tool holder, tool clamping structure, processing device and machine tool

technical field

The invention relates to the field of machine tool processing, in particular to an ultrasonic tool handle, a tool clamping structure, a processing device and a machine tool.

Background technique

In ultrasonic machining, the horn transmits the amplified ultrasonic vibration longitudinally to the cutting tool to achieve one-dimensional processing of the workpiece, but this processing will shorten the life of the cutting tool and reduce the processing efficiency. In order to solve the above problems, a longitudinal-torsion composite In the ultrasonic machining of vibration, it is common to install a longitudinal-torsional conversion unit on the horn, but in the actual machining process, the torsional vibration is usually lost in the transmission process, and there is no torsional vibration when it is transmitted to the tool, only the longitudinal vibration , so it is difficult to realize the longitudinal-torsional compound vibration, and it is difficult to realize the multi-frequency longitudinal-torsional vibration of the handle in the prior art.

Contents of the invention

In order to overcome at least one of the defects in the prior art, the object of the present invention is to provide an ultrasonic tool holder, a tool clamping structure, a processing device and a machine tool, which solve the problem of the existing tool holder proposed by the application that is difficult to realize longitudinal The problem of torsional compound vibration.

The purpose of this application adopts following technical scheme to realize:

An embodiment of the present application provides an ultrasonic tool holder, which includes a horn connected to the tool holder body in turn and a tool clamping structure, and the tool clamping structure includes a tool clamping section and a tool holder connecting section connected to each other , the tool clamping section is provided with an axially extending tool clamping hole, the knife handle connecting section is provided with a first mating surface; An accommodating cavity, the accommodating cavity is provided with a second mating surface matched with the first mating surface; and the outer peripheral surface of the tool holding section is provided with a longitudinal torsion conversion unit, and the longitudinal torsion conversion unit is used for low frequency , intermediate frequency and high frequency convert the multi-frequency longitudinal vibration transmitted by the horn into multi-frequency longitudinal-torsional compound vibration.

Optionally, the tool clamping structure is provided with a first internal cooling channel axially penetrating to the front end surface of the tool clamping section, and the first internal cooling channel is used for axial installation with the tool holder body The hole is connected, so that the cooling medium and/or lubricating medium is transmitted from the installation hole of the handle body to the first internal cooling passage; the handle body also includes an internal cooling pipeline, and the internal cooling pipeline is installed on the In the installation hole, the internal cooling pipe communicates with the first internal cooling passage, and the internal cooling pipe is passed through the horn.

Optionally, the rear end of the tool holding hole is provided with a radially recessed annular groove, the annular groove includes a front side wall connected to the tool holding hole, and the outer periphery of the tool holding hole is distributed with A plurality of first internal cooling passages, the first internal cooling passages axially extend from the front side wall to the front end face of the tool holding section, the shank connecting section is provided with the first internal cooling passages The transmission channel of the communicating cooling medium and/or lubricating medium, the front end of the internal cooling pipeline extends into the transmission channel, or the front end of the internal cooling pipeline extends into the annular groove; the internal cooling pipeline A sealing assembly is arranged between the transmission channel and the rear end.

Optionally, a sealing assembly is provided between the horn and the inner cooling pipe.

Optionally, a stepped hole is provided at the rear end of the connecting section of the knife handle, and the sealing assembly includes a sealing ring and a sealing pressure ring, and the sealing pressing ring and the sealing ring are formed from the rear end of the connecting section of the knife handle. forwardly and sequentially set in the stepped holes.

Optionally, the first internal cooling passage extends axially from the end face of the tool handle connecting section to the end face of the tool holding section, and the front end of the internal cooling pipe extends to the rear of the tool handle connecting section end, and communicate with the first internal cooling channel.

Optionally, the ultrasonic tool handle also includes a transducer assembly, and the front end of the tool handle body is provided with an accommodating cavity; the horn includes a cylinder part arranged in the accommodating cavity, and The connection part connected with the cylinder part, the outer periphery of the connection part is connected with the handle body, the transducer assembly is arranged in the accommodating cavity and connected with the cylinder part; the cylinder The part is integrally formed with the connection part, and the transducer assembly is screw connected with the cylinder part.

Optionally, it also includes a pull stud, the rear end of the handle body is provided with an assembly hole, the assembly hole is threadedly connected to the rear end of the pull stud, and the pull stud is provided with a hole for the internal cooling pipe to pass through. provided through-holes.

Optionally, a nut is also included, and the tool clamping structure is connected with the handle body through the nut.

Optionally, the first mating surface is a conical surface, and the conical surface is converging away from the tool clamping section, the tool handle connection section is connected to the tool handle body through the nut, and the tool handle The clamping section is arranged at the front end of the nut, the rear end of the tool clamping hole is located between the front end and the rear end of the tool clamping segment, and the rear end of the tool clamping hole is close to the tool Rear end of clamping segment.

The embodiment of the present application also provides a tool clamping structure, including a tool clamping section and a knife handle connection section for directly mating with the knife handle member, the knife handle connection section is provided with a first mating surface, the The first mating surface is used to directly cooperate with the second mating surface of the handle member, and the tool holding section is provided with an axially extending tool holding hole; the outer peripheral surface of the tool holding section is provided with a longitudinal A torsional conversion unit, the longitudinal torsion conversion unit is used to convert the longitudinal vibration into longitudinal and torsional composite vibration at low frequency, medium frequency and high frequency.

Optionally, the longitudinal-torsion conversion unit includes several longitudinal-torsion conversion grooves, and the longitudinal-torsion conversion grooves are evenly spaced along the circumferential direction.

Optionally, the longitudinal-twist conversion groove is radially recessed and spirally extends around the axis.

Optionally, the helix angle of the longitudinal-twisting conversion groove is 5°-85°.

Optionally, the tool clamping structure is provided with a first internal cooling channel axially penetrating to the front end surface of the tool clamping section, the first internal cooling channel is used to communicate with the mounting hole of the tool handle body, The cooling medium and/or the lubricating medium are transmitted from the installation hole of the handle body to the first internal cooling channel.

Optionally, the first internal cooling channel extends axially from the end surface of the tool holder connecting section to the end surface of the tool holding section.

Optionally, a radially recessed annular groove is provided at the rear end of the tool holding hole, the annular groove includes a front side wall connected to the tool holding hole, and several The first internal cooling channel, the first internal cooling channel axially extends from the front side wall to the front end face of the tool holding section, the handle connection section is provided with a communication channel with the first internal cooling channel A cooling medium and/or lubricating medium transmission channel, the transmission channel is used to communicate with the first internal cooling channel and the mounting hole of the handle body.

Optionally, several of the first internal cooling passages are evenly distributed outside the tool holding hole along the circumferential direction.

Optionally, the diameter of the transmission channel is smaller than the diameter of the tool holding hole.

Optionally, the front side wall of the annular groove is a conical surface, and the conical surface converges toward the tool holding section.

Optionally, the rear end of the tool connecting section is provided with a stepped hole coaxial with the transmission channel and used for installing a sealing assembly, from the rear end of the tool handle connecting section to the tool holding section, The diameter of the stepped hole gradually decreases.

Optionally, the first mating surface is a conical surface, and the conical surface converges away from the tool holding section.

Embodiments of the present application also provide a processing device, including a tool and an ultrasonic tool holder according to any one of the embodiments of the application, wherein the tool is fixedly installed in the ultrasonic tool holder.

Optionally, the tool is shrink-fitted into the ultrasonic tool holder.

Optionally, the shank of the tool is provided with a second internal cooling channel.

Embodiments of the present application also provide a machine tool, including: a machine tool body, and a spindle disposed on the machine tool body, and the spindle is connected to the processing device in any embodiment of the embodiments of the present application.

The application provides an ultrasonic tool holder, a tool clamping structure, a processing device, and a machine tool. The ultrasonic tool holder includes a horn and a tool clamping structure sequentially connected to the tool handle body. The tool clamping structure includes The tool clamping section and the tool handle connecting section are connected to each other. The outer peripheral surface of the tool clamping section is provided with a longitudinal torsion conversion unit, and the longitudinal torsion conversion unit is used to convert the multi-frequency longitudinal vibration transmitted by the horn into multi-frequency Frequency longitudinal-torsional compound vibration. A longitudinal-torsional conversion unit is arranged on the outer peripheral surface of the tool holding section, and the longitudinal-torsional conversion unit is used to convert longitudinal vibration into longitudinal-torsional compound vibration at low frequency, medium frequency and high frequency. In the prior art, the longitudinal-torsional conversion unit is arranged on the horn, and the converted torsional vibration needs to pass through the nut before being transmitted to the tool. During the transmission process, the torsional vibration is gradually lost, so when the ultrasonic vibration is transmitted to the tool, only Longitudinal vibration without torsional vibration can not realize longitudinal and torsional composite vibration; however, in this application, the longitudinal torsion conversion unit is set on the tool clamping structure, and the longitudinal torsion conversion unit is relatively close to the tool, and the converted torsional vibration is directly transmitted to the tool At the end, the longitudinal-torsional compound vibration is finally realized. The longitudinal torsion conversion unit on the tool clamping structure of the present application converts longitudinal vibration into longitudinal torsion compound rotation, and converts one-dimensional machining into two-dimensional machining, which further prolongs the service life of the tool, improves machining efficiency, and improves the surface of the processed workpiece roughness.

The tool clamping structure includes a tool clamping section and a knife handle connection section for mating connection with the knife handle. The two mating surfaces cooperate, and the tool clamping section is provided with an axially extending tool clamping hole. When the tool is connected through the principle of thermal expansion and contraction, only the clamping section can be heated, and it can be used as a matching connection section of the collet Then it can be directly connected to the tool handle or the horn through the interference fit connection. The mating connection section is not easily oxidized and will not affect the assembly accuracy of the mating connection section, thereby ensuring the precision of the cutting tool during processing.

Description of drawings

Fig. 1 is a structural schematic diagram of a tool connected to a tool clamping structure of the present application;

Fig. 2 is the bottom view of the tool clamping structure connected with the tool in Fig. 1;

Fig. 3 is an axial sectional view of an embodiment in which a tool is connected to the tool clamping structure in Fig. 1;

Fig. 4 is an axial sectional view of an embodiment of the tool clamping structure in Fig. 1;

Fig. 5 is an axial sectional view of another embodiment of the tool clamping structure in Fig. 1;

Fig. 6 is a structural schematic diagram of an ultrasonic knife holder in the present application;

Fig. 7 is an axial sectional view of the ultrasonic knife holder in Fig. 6;

Fig. 8 is an axial sectional view of an ultrasonic tool holder in the present application including a horn;

Fig. 9 is an axial sectional view of another handle of the present application;

Fig. 10 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the present application in the low frequency range;

Fig. 11 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the present application in the intermediate frequency range;

Fig. 12 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the present application in the high frequency range;

Fig. 13 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the comparative example in the low frequency range;

Fig. 14 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the comparative example in the intermediate frequency range;

Fig. 15 is a schematic diagram of the vibration amplitude modal distribution of the ultrasonic tool holder of the comparative example in the high frequency range;

Fig. 16 is the schematic diagram of the ultrasonic knife handle of comparative example;

Among them, 1. Tool clamping structure; 11. Knife handle connection section; 12. Tool clamping section; 121. Tool clamping hole; 122. Annular groove; 1221. Front side wall; 13. First internal cooling channel; 14. Front end face; 15. Longitudinal torsion conversion slot; 111. Transmission channel; 112. Step hole; 113. First mating surface; 2. Knife handle body; 21. Accommodating cavity; 22. Mounting hole; Components; 24. Transducer component; 25. Horn; 251. Hollow cylindrical part; 252. Connecting part; 26. Assembly hole; 27. Accommodating cavity; 271. Second mating surface; 41, sealing ring; 42, sealing pressure ring; 5, pulling nail; 6, nut; 7, cutter.

Detailed ways

Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application. Wherein, "front" refers to the end close to the workpiece when the high-frequency ultrasonic toolholder in this embodiment is used for processing, and "rear" refers to the end away from the workpiece.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to Fig. 1 to Fig. 5, the embodiment of the present application provides a tool clamping structure 1, including a handle connecting section 11 and a tool clamping section 12, the tool clamping section 12 is provided with an axially extending tool clamping Hole 121, the tool holding hole 121 is used to clamp the tool, and the knife handle connection section 11 is used to directly connect with the knife handle member, that is, the first mating surface 113 is provided on the knife handle connection section 11, and the knife handle member is provided with the first mating surface 113. The two mating surfaces 271 are mated and connected through the two mating surfaces to realize the connection between the tool clamping structure and the handle member. The knife handle member can be a knife handle body (corresponding to a common knife handle) or an ultrasonic knife handle including a knife handle body, a transducer and a horn. When the knife handle is a knife handle body, the second mating surface 271 is arranged on On the handle body 2 (as shown in Figure 9), when the handle includes the horn 25 and the handle body 2, the handle connecting section 11 is connected to the horn 25, and the horn 25 is connected to the handle body 2 connection, the second mating surface 271 is set on the horn 25 (as shown in Figure 7-8).

Referring to Fig. 3, Fig. 4, Fig. 7 and Fig. 9, in one embodiment, the knife handle connection section 11 is installed in the knife handle member, and the section extending out of the nut is the tool holding section 12, and then through thermal expansion When the cold shrinkage principle is used to connect the tool, only the tool clamping section 12 can be heated, while the tool handle connecting section 11 as a collet can be directly connected to the tool handle body or the horn through a tightly fitting connection, that is The tool holding structure 1 can be used on ultrasonic tool holders (as shown in FIG. 7 ) and ordinary tool holders (as shown in FIG. 9 ). In the process of repeatedly clamping the tool into the tool holding hole 121 of the tool holding section 12, since it is not necessary to heat the knife handle connecting section 11 as a collet for many times, the knife handle connecting section 11 is not easy to heat. Oxidation occurs, so that the material of the tool handle connecting section 11 used as a collet will not change, and furthermore, the assembly accuracy of the tool handle connecting section 11 will not be affected, thereby ensuring the accuracy of the tool during processing.

In combination with the aforementioned examples, in one embodiment, referring to FIGS. 1 to 5 , the tool holding section 12 clamps the tool into the tool holding hole 121 through the principle of thermal expansion and contraction. In order to ensure the stability of the tool clamping, After the tool has been clamped in the tool holding hole 121 , it is necessary to cool the tool holding section 12 rapidly. The first internal cooling passage 13 extends from the rear end surface of the handle connecting section 11 to the front end surface of the tool holding section 12. After the tool holding structure 1 is heated and the heat is transferred to the connecting section 11, the first internal The cooling medium and/or lubricating medium flowing in the cold channel 13 can cool the connecting section of the tool holder, reduce heat damage to the material of the clamping section of the tool holder, that is, avoid oxidation of the connecting section of the tool holder, and ensure that the collet and the tool holder are The accuracy of the matching connection, thereby ensuring the machining accuracy of the tool. It should be noted that the first internal cooling channel 13 is arranged on the tool clamping structure 1, which avoids setting up an annular internal cooling channel on the tool handle, ensures the rigidity of the tool handle, and then ensures that the tool handle is clamped to the tool clamping structure 13. maintain stability.

It should be noted that the tool clamping structure is connected to the tool holder with the horn. Referring to Figures 1 to 9, the peripheral surface of the tool holder connection section 11 is a conical surface, and correspondingly, the first mating surface 113 is also a conical surface. , and the conical surface converges at the rear end of the handle connecting section 11 . When the tool clamping structure is directly connected with the tool handle body, the peripheral surface of the tool handle connection section is a cylindrical surface.

In yet another embodiment, referring to Fig. 1 to Fig. 4, Fig. 6, Fig. 7 and Fig. 9, on the basis of ensuring the stability of tool clamping, in order to improve the transmission efficiency of cooling medium and/or lubricating medium. A radially recessed annular groove 122 is provided at the rear end of the tool holding hole 121 so as to reserve a hole space for the first internal cooling channel described later. Since the annular groove 122 includes a front side wall 1221 connected to the tool holding hole 121, several first internal cooling passages 13 are axially opened from the front side wall 1221 to the front end face 14 of the clamping section 12, so that the first The internal cooling channels 13 can be distributed on the outer periphery of the tool holding hole 121 . Correspondingly, the tool holder connection section 11 is provided with a transmission channel 111 opposite to the tool holding hole 121 and used for installing a transmission channel for cooling medium and/or lubricating medium, so as to transmit cooling medium and/or lubricating medium through the transmission channel 111 The medium cools the tool holding section 12 and the tool, or lubricates the tool processing area and the tool. It should be noted that the cooling medium provided in the embodiment of the present application includes: cooling liquid, water, carbon dioxide, nitrogen, air, etc., and the lubricating medium includes oil mist, etc.

In combination with the foregoing, referring to FIG. 4 , FIG. 7 and FIG. 9 , the annular groove 122 can not only reserve an opening space for the first internal cooling channel, so that the transmission channel 111 can communicate with the first internal cooling channel 13 , the annular groove 122 Pressure cavities can also be formed. In one embodiment, the diameter of the transmission channel 111 of the internal cooling pipeline is smaller than the diameter of the tool holding hole 121, and the lubricating medium is transmitted to the rear end of the tool 7 through the internal cooling pipeline 3, that is, when the rear end of the first internal cooling channel 13, If there is no annular groove 122 and the aperture of the first internal cooling passage 13 is smaller than the inner diameter of the internal cooling pipe, the pressure of the microlubricating medium transmitted by the internal cooling pipe will suddenly increase. On the basis of fluid dynamics, the internal cooling pipe 3 The fluid at the front end of the internal cooling channel 13 and the back end of the first internal cooling channel 13 is difficult to exert a reaction force on the micro-lubrication medium transmitted in the internal cooling channel, so that the micro-quantity lubrication medium will flow to the side of the internal cooling channel, causing the micro-quantity lubrication medium to accumulate in the first internal cooling channel. The rear end of the internal cooling channel 13 prevents the minimum quantity lubrication medium from being quickly transported into the first internal cooling channel 13 .

Therefore, in conjunction with Fig. 4, Fig. 7 and Fig. 9, it can be seen that an annular groove 122 is provided at the rear end of the first internal cooling channel 13, and the diameter of the through hole of the internal cooling channel 3 is smaller than the diameter of the tool holding hole 121, so that the microlubricating medium is The pressure increase speed at the rear end of the ring 122 is relatively slow, which facilitates the smooth flow of the micro-lubrication medium into the first internal cooling channel 13, and improves the transmission efficiency of the micro-quantity lubrication medium. For example, when the minimum amount of lubrication medium is oil mist, the oil mist can be quickly transmitted from the first internal cooling channel 13 to the tool and the processing area, avoiding the accumulation of oil mist at the rear end of the first internal cooling channel 13, and improving the micro lubrication. The transmission efficiency of lubricating oil mist can also improve the transmission efficiency of other minimal lubrication media to the tool head. At the same time, the pressure cavity formed by the annular groove 122 can avoid oil mist from accumulating at the rear end of the tool, and can also prevent oil mist from forming dirt and accumulating in the rear end of the tool and the first internal cooling channel 13, avoiding multiple injections on the first internal cooling channel 13. The cold aisle 13 is cleaned.

Based on the foregoing, it can be seen that the tool is clamped to the clamping section by the principle of thermal expansion and contraction. In order to ensure the stability of the tool installation, it is necessary to quickly cool the tool and the clamping section. After the tool is clamped, in order to improve the cooling efficiency, Referring to FIG. 4 , FIG. 5 and FIG. 7 , several first internal cooling passages 13 need to be opened inside the tool holding section 12 so that there are several first internal cooling passages 13 distributed outside the tool holding hole 121 . Optionally, several first internal cooling passages 13 are evenly distributed on the outer periphery of the tool holding hole 121 along the circumferential direction, so as to uniformly cool the tool holding section 12 and the tool and improve cooling efficiency.

Referring to Fig. 4, Fig. 7 and Fig. 9, in combination with the foregoing, it can be seen that the annular groove 122 can form a pressure chamber for a minimum amount of lubrication medium, so that the minimum amount of lubrication medium can be smoothly introduced into the first internal cooling channel 13, further, the annular The front side wall 1221 of the groove 122 is a conical surface, so that the annular groove 122 forms a funnel shape, and the bottom of the funnel faces the first internal cooling passage 13, that is, the front side wall of the annular groove 122 is a conical surface, and the The conical surface converges towards the clamping section 12 . Furthermore, the microlubricating medium in the internal cooling pipeline expands first in the annular groove 122, so that the pressure at the bottom of the funnel can gradually increase, and then during the continuous transmission of the microlubricating medium in the internal cooling pipeline, the area near the front side wall The force generated by the micro-quantity lubrication medium toward the internal cooling pipe is relatively small, and the micro-quantity lubrication medium near the front side wall can be squeezed into the first internal cooling channel 13, so that the micro-quantity lubrication medium can be smoothly transmitted to the first internal cooling channel 13. In the cold channel 13, the accumulation of the micro-lubrication medium at the rear end of the tool is avoided, and the transmission efficiency of the micro-lubrication medium is improved.

In the embodiment provided by the present application, referring to FIG. 7 , since the front end of the internal cooling pipe 3 will extend into the through hole after installation, so as to facilitate the transmission of the cooling medium and/or lubricating medium into the first internal cooling channel 13, During this process, in order to prevent the cooling medium and/or lubricating medium from leaking into other structures, the rear end of the handle connecting section 11 is provided with a step hole 112 coaxial with the transmission channel 111 and used for installing the sealing assembly, from which The diameter of the stepped hole 112 decreases gradually toward the clamping section 12 from the rear end of the handle connection section 11 . Referring to FIG. 4 , the smaller-diameter hole in the stepped hole 112 is used for installing the middle sealing ring of the sealing assembly, and the larger-diameter hole in the stepped hole 112 is used for installing the sealing pressure ring in the sealing assembly.

The embodiment of the present application also provides an ultrasonic tool handle, referring to Fig. 6 and Fig. 7, including the tool handle body 2, the wireless receiving component 23, the transducer component 24, the horn 25 and the tool according to any embodiment of the present application Clamping structure 1. The accommodating chamber 27 is arranged at the front end of the handle body 2, which is equivalent to the accommodating chamber 27 being arranged at the front end of the horn 25, that is, the front end of the horn 25 is provided with an accommodating chamber 27, and the handle body 2 is provided with a place for installing the horn 25. Accommodating chamber 21. The tool clamping structure 1 is directly connected with the housing cavity 27, and the second mating surface 271 is the wall surface of the housing cavity 27, that is, the handle connecting section 11 is arranged in the housing cavity 27, and the tool holding section 12 is arranged in the housing cavity 21 outside. The wireless receiving component 23 is arranged on the outer periphery of the knife handle body 2, and the wireless receiving component 23 is used to cooperate with the wireless transmitting component to realize electrical transmission by means of wireless transmission. The wireless receiving component 23 includes a wireless receiving ring 231, a wireless receiving magnetic core 232 and a wireless receiving coil (not shown), the wireless receiving coil is sealed in the wireless receiving magnetic core 232 by a sealant, and the wireless receiving magnetic core 232 is fixed by an adhesive Set in the wireless receiving loop 231. The tool clamping structure in this application can be matched not only with BT tool holders, but also with HSK tool holders and other types of tool holders. The ultrasonic tool holders in Figure 6-8 are all BT tool holders, which are only used as examples. The structure of the ultrasonic tool holder is not limiting.

On the basis of ensuring the stability of tool clamping, in order to generate vibrations other than longitudinal vibration, a longitudinal-torsional conversion unit is installed on the outer peripheral surface of the tool clamping section to convert the longitudinal vibration generated by the ultrasonic tool holder into longitudinal-torsional composite vibration. Specifically referring to FIG. 1 , and FIG. 3 to FIG. 4 , the longitudinal-torsion conversion unit includes several longitudinal-torsion conversion grooves 15 , and each longitudinal-torsion conversion groove 15 is evenly spaced along the circumferential direction. The vertical-twist conversion groove 15 extends inward along the radial direction of the tool holding structure 1 and extends helically around the axis. Of course, in other embodiments, the longitudinal-twist conversion unit may also be a longitudinal-twist conversion through hole.

The ultrasonic longitudinal vibration converted by the transducer is transmitted to the horn, and after being amplified by the horn, it is transmitted to the tool clamping structure and the tool. The longitudinal torsional conversion unit converts the longitudinal vibration into torsional vibration to form torsional vibration. In the prior art, the longitudinal-torsional conversion unit is set on the horn, and the converted torsional vibration needs to pass through the nut before being transmitted to the tool. During the transmission process, the torsional vibration is gradually lost, so when the ultrasonic vibration is transmitted to the tool, only the longitudinal Vibration without torsional vibration, can not achieve longitudinal torsional compound vibration; and in this application, the longitudinal torsion conversion unit is set on the tool clamping structure, the longitudinal torsion conversion unit is relatively close to the tool, and the converted torsional vibration is directly transmitted to the tool end Finally, the longitudinal and torsional compound vibration is realized, which further prolongs the service life of the tool, improves the processing efficiency, and improves the surface roughness of the processed workpiece.

The longitudinal-torsional conversion unit in the tool clamping structure 1 of the present application is close to the tool, and can convert part of the longitudinal vibration of the corresponding frequency into torsional vibration with less loss; and according to the principle of optimal resonance, the diameter of the transducer is smaller than the resonance frequency The efficiency is higher at 1/4 of the lower wavelength. The ultrasonic tool holder structure in this application can also realize multi-frequency compatible longitudinal-torsional compound vibration, so it not only improves the service life of the tool, improves the processing efficiency, but also meets the needs of different processing.

Moreover, in order to ensure the longitudinal-torsion conversion effect, the longitudinal-torsion conversion groove 15 spirally extends around the axis, and its helix angle is 5°-85°, and the axial length of the longitudinal-torsion conversion groove 15 is 1/4-9 of the tool holding section 12 /10. The length of the longitudinal-twisting conversion groove 15 is only 1/4 of the tool holding section 12, which can also achieve a better conversion effect.

Table 1 Relevant parameters of the ultrasonic knife handle of the embodiment of the present application

Table 2 Relevant parameters of the ultrasonic tool holder with the vertical-torque conversion unit set on the horn

Figures 10-12 respectively correspond to the ultrasonic tool holder of the present application (the ultrasonic tool holder in which the vertical torsion conversion unit is arranged on the tool holding structure, and the tool holding structure of the present application is installed on the HSK tool holder) at low frequency (30.5KHz), The schematic diagram of vibration simulation in the range of intermediate frequency (37.8KHz) and high frequency (57.7KHz) all shows that there are longitudinal vibration and torsional vibration on the cutting tool, and table 1 shows that the ultrasonic tool holder of the present application is at low frequency (29.3KHz), intermediate frequency ( 38.4KHz) and high frequency (56.6KHz) actual vibration conditions (due to the difference between the simulated situation and the actual ultrasonic vibration process, there will be some differences between the actual and simulated resonance frequencies), the longitudinal amplitude and torsional amplitude are both greater than or equal to 0.5μm, that is The ultrasonic tool holder can realize longitudinal-torsional compound vibration at multiple frequencies, which further proves that the ultrasonic tool holder can realize longitudinal-torsional compound vibration at multiple frequencies of low frequency, intermediate frequency and high frequency; and Fig. 13-15 respectively correspond to Fig. 16 As a comparative example, the vibration simulation schematic diagram of the ultrasonic tool holder in the range of low frequency (23.5KHz), intermediate frequency (38.3KHz) and high frequency (57.4KHz), wherein, in Figure 16, the longitudinal torsion conversion unit of the ultrasonic tool holder is set at variable On the horn, that is, the longitudinal-torsion conversion groove 15' in the figure is set on the horn 25'; the vibration simulation diagrams in the three frequency ranges of low frequency, intermediate frequency and high frequency all show that there is only longitudinal vibration of the tool and no torsional vibration. Therefore, the longitudinal-torsional compound vibration has not been realized; Table 2 shows the actual vibration of the ultrasonic tool holder of the comparative example. From Table 2, it can be seen that the ultrasonic tool holder of the comparative example has only longitudinal vibration in the low-frequency, intermediate-frequency and high-frequency ranges, and there is no torsional vibration , which further proves that the ultrasonic tool holder of the comparative example cannot realize the longitudinal-torsional compound vibration at any frequency of low frequency, intermediate frequency and high frequency, let alone the longitudinal-torsional compound vibration at multiple frequencies of low frequency, intermediate frequency and high frequency.

It should be noted that in Table 1 and Table 2, low frequency, intermediate frequency and high frequency are a range of values, and the value range of low frequency, intermediate frequency and high frequency is only a relative determination. In actual situations, appropriate Adjustments are all within the protection scope of the present application.

In one embodiment, the handle body 2 is provided with an installation hole 22 opposite to the transmission channel 111 in the axial direction, so as to install the inner cooling pipeline 3 in the installation hole 22, and the inner cooling pipeline 3 is connected to the installation hole 22. The first internal cooling passage 13 communicates, so that the cooling medium and/or the lubricating transmission medium is transmitted into the first internal cooling passage 13 through the internal cooling pipeline 3 .

In one embodiment, referring to FIG. 4 , FIG. 7 and FIG. 9 , the rear end of the tool holding hole 121 is provided with a radially recessed annular groove 122 , and the first inner cooling channel 13 is axially formed from the front side wall 1221 . Extending to the front end of the tool holding section 12, in order to prevent the cooling medium and/or lubricating transmission medium from leaking into other components of the tool handle, the front end of the internal cooling pipeline 3 extends to the transmission of the tool holder connecting section 11 In the channel 111, the cooling medium and/or lubricating medium can be quickly and more directly transmitted to the first internal cooling channel 13 of the tool holding structure 1, and the connection between the internal cooling channel 3 and the rear end of the transmission channel 111 A sealing assembly is arranged between them, which can further prevent the cooling medium and/or lubricating medium from leaking from the rear end of the handle connecting section 11, and at the same time reduce the sealing assembly between the connecting section of the handle and the body of the handle.

In one embodiment, referring to Fig. 1 to Fig. 9, the front end of the internal cooling pipe 3 extends into the annular groove 122 or the transmission channel 111, so that the cooling medium and/or lubricating medium can be directly transmitted to the first The rear end of the internal cooling passage 13 improves the transmission efficiency of the cooling liquid/minimal quantity lubrication medium. In yet another embodiment, a stepped hole 112 is provided at the rear end of the knife handle connection section 11, and the sealing assembly includes a sealing ring 41 and a sealing pressure ring 42, and the sealing pressure ring 42 and the sealing ring 41 are separated from the knife handle connection section. The rear end of 11 is sequentially arranged in the step hole 112 forward, that is, the sealing pressure ring 42 will press the sealing ring 41 in the step hole 112 from the rear end of the handle connection section 11, so as to ensure the sealing of the rear end of the handle connection section .

Referring to FIG. 7, the transducer assembly 24 includes a rear cover plate, a plurality of stacked electrode sheets and piezoelectric ceramic sheets, and the horn 25 includes a hollow cylindrical portion 251 disposed in the accommodating cavity 21, And the connecting portion 252 connected with the hollow cylindrical portion 251, the rear cover plate, a plurality of stacked electrode sheets and piezoelectric ceramic sheets are arranged on the outer periphery of the hollow cylindrical portion 251; the outer periphery of the connecting portion 252 It is connected with the handle body 2. In one embodiment, the hollow cylinder part 251 and the connecting part 252 are integrally formed, and the rear cover is screwed to the hollow cylinder, thereby facilitating disassembly and replacement of the rear cover and the transducer assembly.

In yet another embodiment, referring to FIG. 7 , the outer periphery of the connecting portion 252 is provided with a structure connected to the handle body 2, and can cover the opening of the entire accommodating cavity 21, thereby ensuring the connection between the horn 25 and the handle body 2. of stability. The connecting portion 252 is provided with an accommodating chamber 27 in the axial direction which is matched with the connecting section 11 of the handle, so that the outer circumference of the connecting section of the handle can be tightly connected with the inner circumference of the connecting hole, reducing the number of connections between the connecting section 11 of the handle and the horn. 25, the internal cooling pipe 3 is penetrated in the hollow cylindrical part 251 and extends into the through hole 111, since the outer periphery of the connecting section 11 of the handle and the horn 25 does not need to be provided with a sealing assembly , reducing the set of seal components.

It can be seen from the foregoing that referring to FIG. 7 , in order to prevent the cooling medium and/or lubricating medium from leaking into other tool holder components, a sealing assembly is provided between the horn 25 and the internal cooling pipe 3 . Optionally, the through hole in the hollow cylindrical part 251 is used to pass through the internal cooling pipe. In order to prevent external impurities and water vapor from entering the accommodating cavity 21, a There is a sealing assembly, the sealing assembly includes a sealing compression ring and a sealing ring, and the sealing ring in the two sealing assemblies is arranged between the two sealing compression rings, that is, the sealing compression ring seals and compresses the sealing ring in the through hole to ensure the sealing performance.

In yet another embodiment, referring to Fig. 5 and Fig. 7, when the horn 25 and the tool clamping structure 2 provided by the embodiment of the present application connected with the horn 25 are provided in the tool handle body 2, the first inner The cold channel 13 extends axially from the rear end surface of the handle connecting section 11 to the front end surface of the tool holding section 12, and the front end of the inner cooling pipeline 3 extends to the rear end of the connecting section 11 of the knife handle, and is connected to the The first internal cooling channel 13 is connected. After the tool holding structure 1 is heated and the heat is transferred to the tool shank connecting section 11 , the cooling medium and/or lubricating medium flowing in the first internal cooling channel 13 can cool the tool shank connecting section.

In yet another embodiment, referring to Fig. 4 and Fig. 7, when the horn 25 and the tool clamping structure 2 provided by the embodiment of the present application connected with the horn 25 are provided in the tool handle body 2, the first inner The cold channel 13 extends axially from the front side wall of the annular groove 122 to the front end surface of the tool holding section 12, and the front end of the internal cooling pipeline 13 extends to the transmission channel 111 in the handle connecting section 11, or the internal cooling pipeline The front end of 13 extends into the annular groove 122 , so that the transmission channel 111 can communicate with the first internal cooling channel 13 .

In yet another embodiment, referring to Fig. 6 and Fig. 7, a pull stud 5 is also included, and an assembly hole 26 is provided at the rear end of the handle body, and the assembly hole 26 is threadedly connected to the front end of the pull stud 5, the The pull stud 5 is provided with a through hole through which the internal cooling pipeline 3 passes, and the through hole is opposite to the installation hole 22 of the internal cooling pipeline 3 provided by the knife handle body 2, so that the internal cooling pipeline can be installed in a straight line, wherein the assembly hole 26 The installation hole 22 of the internal cooling pipe 3 is coaxial and communicated with the accommodating cavity 21, which is used to ensure that the internal cooling pipe 3 is more convenient to install, and at the same time, the coolant/minimal lubrication medium can pass through the through hole of the pull stud 5, and then pass through The inner cooling pipe 3 is transmitted to the inner pipe passage 13, and then transferred to the tool and the tool processing area to realize internal cooling processing/minimum quantity lubrication. Further, since the accommodating cavity 21 cannot contain impurities and water vapor, a sealing assembly is also provided between the front end of the through hole of the pull rivet 5 and the internal cooling pipe. The sealing ring is pressed tightly in the through hole of the rivet to prevent external impurities and water vapor from entering the accommodating cavity 21 .

In yet another embodiment, referring to FIG. 6 and FIG. 7 , it further includes a nut 6 through which the tool clamping structure 1 is connected to the handle body 2 . When the horn 25 is provided, the nut 6 is threadedly connected with the horn 25, so that the tool holding section 12 is located at the front end of the nut 6, that is, the tool holding section 12 protrudes from the nut 6, so that the handle The first mating surface 113 of the connecting section 11 can closely fit the second mating surface 271 through the nut, so as to ensure the stability of the connection between the tool clamping structure 1 and the handle body 2 or the horn 25, while avoiding water vapor, dust and Impurities such as dust enter the handle. At the same time, it is convenient to clamp the tool, and the connection between the tool handle connecting section 11 and the tool handle body or the horn will not be affected during the tool clamping process.

In yet another embodiment, referring to Fig. 6 and Fig. 7, when the horn 25 is provided, the nut 6 is threadedly connected to the horn 25, and the handle connecting section 11 is fixedly connected to the horn, refer to As shown in Fig. 1 to Fig. 7, the peripheral surface of the handle connection section 11 is a conical surface, and the conical surface converges at the rear end of the handle connection section. Correspondingly, the first mating surface 113 is also a conical surface to ensure the stability of the connection. At the same time, prevent impurities such as water vapor, dust and dust from entering the handle. The tool holding section 12 in the tool holding structure 1 extends out of the nut for holding the tool. Wherein, the rear end of the tool holding hole is located between the front end and the rear end of the tool holding section 12, and the rear end of the tool holding hole 121 is close to the rear end of the tool holding section 11, and then when the tool is clamped, only The tool holding section 12 is heated, and the tool is clamped into the tool holding hole 121 to reduce the damage to the tool handle connecting section 11 during the shrink fit process, and at the same time ensure the clamping accuracy of the tool handle connecting section 11, for Guarantee the machining accuracy of the tool.

An embodiment of the present application also provides a processing device, including a tool and an ultrasonic tool handle according to any one of the embodiments of the present application, and the tool is fixedly installed in the tool holding hole. Optionally, the tool is thermally installed in the tool holding hole, so as to simplify the connection mode and ensure the stability of the tool connection, as well as ensure the clamping accuracy of the tool. In order to improve the cooling efficiency of the tool and the processing area, in the embodiment provided by the application, the tool handle is provided with a second internal cooling channel (not shown in the figure), and the second internal cooling channel is along the axis of the shaft around the tool handle. The groove extending straight, or the groove spirally extending around the axis on the peripheral surface of the shank of the tool, or the through hole extending linearly along the axial direction of the shank of the tool.

The embodiment of the present application also provides a machine tool, including: a machine tool body, and a spindle arranged on the machine tool body, and the spindle is connected to the processing device of any embodiment provided in the embodiment of the present application.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims

An ultrasonic knife handle is characterized in that it includes a horn and a tool clamping structure sequentially connected to the tool handle body, and the tool clamping structure includes a tool clamping section and a tool handle connecting section connected to each other. The tool clamping section is provided with an axially extending tool clamping hole, and the connecting section of the tool handle is provided with a first mating surface; the front end of the horn is provided with an accommodating cavity that cooperates with the tool clamping structure, The accommodating cavity is provided with a second mating surface matched with the first mating surface; and the outer peripheral surface of the tool holding section is provided with a longitudinal torsion conversion unit, and the longitudinal torsion conversion unit is used for low frequency, intermediate frequency and The high frequency converts the longitudinal vibration transmitted by the horn into longitudinal and torsional compound vibration.
The ultrasonic tool holder according to claim 1, wherein the tool holding structure is provided with a first internal cooling channel axially penetrating to the front end surface of the tool holding section, and the first internal cooling channel Used to communicate with the axial mounting hole of the handle body, so that the cooling medium and/or lubricating medium is transmitted from the mounting hole of the handle body to the first internal cooling passage; the handle body also includes an internal cooling channel A pipeline, the internal cooling pipeline is installed in the installation hole, the internal cooling pipeline communicates with the first internal cooling channel, and the internal cooling pipeline is passed through the horn.
The ultrasonic tool handle according to claim 2, wherein the rear end of the tool holding hole is provided with a radially recessed annular groove, and the annular groove includes a front side wall connected to the tool holding hole , the outer circumference of the tool holding hole is distributed with several first internal cooling passages, the first internal cooling passages extend axially from the front side wall to the front end face of the tool holding section, and the handle is connected to The segment is provided with a cooling medium and/or lubricating medium transmission channel communicating with the first internal cooling channel, and the front end of the internal cooling pipeline extends into the transmission channel, or the front end of the internal cooling pipeline extends to the In the annular groove; a sealing assembly is arranged between the internal cooling pipe and the rear end of the transmission channel.
The ultrasonic tool holder according to claim 2, characterized in that a sealing assembly is arranged between the horn and the inner cooling pipe.
The ultrasonic knife holder according to claim 4, wherein a step hole is provided at the rear end of the connecting section of the knife handle, the sealing assembly includes a sealing ring and a sealing pressing ring, and the sealing pressing ring and the sealing The rings are sequentially arranged in the stepped hole forwardly from the rear end of the knife handle connecting section.
The ultrasonic tool holder according to claim 3, wherein the first internal cooling channel extends axially from the end face of the tool handle connecting section to the end face of the tool holding section, and the internal cooling channel The front end extends to the rear end of the handle connecting section and communicates with the first internal cooling channel.
The ultrasonic tool holder according to claim 2, wherein the ultrasonic tool holder also includes a transducer assembly, and the front end of the tool holder body is provided with an accommodating cavity; The cylindrical part in the accommodating cavity, and the connection part connected with the cylindrical part, the outer periphery of the connecting part is connected with the handle body, the transducer assembly is arranged in the accommodating cavity, and is connected with the The cylindrical part is connected; the cylindrical part is integrally formed with the connecting part, and the transducer assembly is screw connected with the cylindrical part.
The ultrasonic tool handle according to claim 2, further comprising a pull stud, the rear end of the handle body is provided with an assembly hole, and the assembly hole is threadedly connected to the rear end of the pull stud, the The pull stud is provided with a through hole for passing the internal cooling pipe.
The ultrasonic knife handle according to claim 1, further comprising a nut, the tool holding structure is connected to the knife handle body through the nut.
The ultrasonic tool holder according to claim 9, wherein the first mating surface is a conical surface, and the conical surface is converging away from the tool clamping section, and the tool holder connecting section passes through the The nut is connected to the handle body, the tool holding section is arranged at the front end of the nut, the rear end of the tool holding hole is located between the front end and the rear end of the tool holding section, and the The rear end of the tool holding hole is close to the rear end of the tool holding section.
A tool clamping structure, characterized in that it includes a tool clamping section and a knife handle connecting section for directly fitting and connecting with a knife handle member, the knife handle connecting section is provided with a first mating surface, and the first fitting The surface is used to directly cooperate with the second mating surface of the tool handle member, and the tool holding section is provided with an axially extending tool holding hole; the outer peripheral surface of the tool holding section is provided with a vertical torsion conversion unit , the longitudinal-torsional conversion unit is used for converting longitudinal vibration into longitudinal-torsional compound vibration at low frequency, medium frequency and high frequency.
The tool clamping structure according to claim 11, wherein the longitudinal-torsion conversion unit includes several longitudinal-torsion conversion grooves, and the longitudinal-torsion conversion grooves are evenly spaced along the circumferential direction.
The tool clamping structure according to claim 12, wherein the longitudinal-twist conversion groove is radially recessed and extends helically around the axis.
The tool clamping structure according to claim 13, characterized in that, the helix angle of the longitudinal-twisting conversion groove is 5°-85°.
The tool holding structure according to claim 11, characterized in that, the tool holding structure is provided with a first internal cooling passage axially penetrating to the front end surface of the tool holding section, and the first internal cooling The channel is used to communicate with the installation hole of the tool holder body, so that the cooling medium and/or lubricating medium is transmitted from the installation hole of the tool holder body to the first internal cooling channel.
The tool holding structure according to claim 15, wherein the first internal cooling channel extends axially from the end surface of the tool holder connection section to the end surface of the tool holding section.
The tool holding structure according to claim 15, wherein the rear end of the tool holding hole is provided with a radially recessed annular groove, and the annular groove includes a front side connected with the tool holding hole wall, a number of first internal cooling passages are distributed on the outer periphery of the tool holding hole, and the first internal cooling passages extend axially from the front side wall to the front end face of the tool holding section, and the handle is connected to The segment is provided with a cooling medium and/or lubricating medium transmission channel communicating with the first internal cooling channel, and the transmission channel is used to communicate with the first internal cooling channel and the mounting hole of the handle body.
The tool holding structure according to claim 15, characterized in that, several of the first internal cooling passages are evenly distributed outside the tool holding hole along the circumferential direction.
The tool holding structure according to claim 17, wherein the diameter of the transmission channel is smaller than the diameter of the tool holding hole.
The tool clamping structure according to claim 17, wherein the front side wall of the annular groove is a conical surface, and the conical surface converges toward the tool clamping section.
The tool clamping structure according to claim 17, characterized in that, the rear end of the tool connecting section is provided with a stepped hole coaxial with the transmission channel and used for installing a sealing assembly, connecting from the tool handle The rear end of the segment is towards the tool clamping segment, and the diameter of the stepped hole gradually decreases.
The tool clamping structure according to claim 12, wherein the first mating surface is a conical surface, and the conical surface converges away from the tool clamping section.
A processing device, characterized by comprising a tool and the ultrasonic tool holder according to any one of claims 1 to 10, the tool is fixedly installed in the ultrasonic tool holder.
The processing device according to claim 23, wherein the tool is shrink-fitted into the ultrasonic tool holder.
The processing device according to claim 23, characterized in that, the shank of the tool is provided with a second internal cooling channel.
A machine tool, characterized by comprising: a machine tool body, and a main shaft arranged on the machine tool body, and the main shaft is connected to the processing device according to any one of claims 23 to 25.