阅读说明：本技术 一种超声振动辅助钎焊多种超硬磨料砂轮的装置和方法 (Device and method for assisting in brazing multiple superhard abrasive grinding wheels through ultrasonic vibration ) 是由 赵彪 蔡开达 丁文锋 徐九华 傅玉灿 苏宏华 其他发明人请求不公开姓名 于 2021-08-30 设计创作，主要内容包括：本发明涉及一种超声振动辅助钎焊多种超硬磨料砂轮的装置和方法,该装置主要包含：动力传输系统、无线传输系统、超声振动系统、冷却环、保护罩和圆盘,其中,圆盘固定在超声振动系统的一端,可连接12个小磨头,也可连接一个大尺寸砂轮,并被冷却环和保护罩包裹；动力传输系统提供超声振动系统和砂轮旋转的动力；无线传输系统可以在超声振动系统旋转时,为其提供电信号。通过该装置可以使砂轮一边转动,一边沿着砂轮轴向方向进行超声振动,同时在高频感应热源的作用下实现多个小磨头或大砂轮的钎焊。本发明通过在砂轮钎焊过程中对砂轮施加超声振动,利用圆盘实现多种砂轮的超声振动辅助钎焊。(The invention relates to a device and a method for brazing a plurality of superhard abrasive grinding wheels by ultrasonic vibration assistance, wherein the device mainly comprises: the device comprises a power transmission system, a wireless transmission system, an ultrasonic vibration system, a cooling ring, a protective cover and a disc, wherein the disc is fixed at one end of the ultrasonic vibration system, can be connected with 12 small grinding heads and can also be connected with a large-size grinding wheel and is wrapped by the cooling ring and the protective cover; the power transmission system provides power for the ultrasonic vibration system and the grinding wheel to rotate; the wireless transmission system may provide an electrical signal to the ultrasonic vibration system as it rotates. The device can rotate the grinding wheel, and simultaneously carry out ultrasonic vibration along the axial direction of the grinding wheel, and simultaneously realize the brazing of a plurality of small grinding heads or large grinding wheels under the action of a high-frequency induction heat source. The invention realizes the ultrasonic vibration auxiliary brazing of various grinding wheels by utilizing the disc by applying ultrasonic vibration to the grinding wheels in the process of brazing the grinding wheels.)

1. The utility model provides a many superabrasive material grinding wheel device of supplementary brazing of ultrasonic vibration which characterized in that: the device comprises a power transmission system (1), a wireless transmission system (2), an ultrasonic vibration system (3) and a disc which are sequentially connected from left to right, wherein the disc is arranged in a protective cover (4), and a semi-cooling ring and a high-frequency induction heat source are also arranged in the protective cover (4); a guide rail seat (5) is fixed at the bottom of the protective cover (4), and the guide rail seat (5) is fixed on a vibration isolation base (6).

2. The apparatus of claim 1, wherein the power transmission system comprises a motor and a pair of master and slave gears, the master gear is connected to the motor shaft, and the slave gear is connected to the rotating shaft at one end of the housing of the ultrasonic vibration system;

the wireless transmission system comprises a primary coil and a secondary coil, wherein the primary coil is fixed on a support frame through a flange plate, and the support frame is fixed on the vibration isolation base (6); the secondary coil is connected with the end face of the ultrasonic vibration system shell through a flange plate;

the ultrasonic vibration system comprises a shell, a piezoelectric ceramic transducer and an amplitude transformer, wherein a bearing is assembled in the middle of a rotating shaft of the shell and is fixed on a support frame; the disc is positioned in the protective cover and wrapped in the semi-cooling ring; the semi-cooling ring is symmetrically fixed on the inner wall of the protective cover through bolts.

3. The device for assisting in brazing multiple superabrasive grinding wheels through ultrasonic vibration according to claim 1, wherein a guide rail is arranged at the bottom of the protective cover, a dovetail groove is arranged at the top of the guide rail seat, and the guide rail and the dovetail groove are fixed through matching of the guide rail and the dovetail groove.

4. The ultrasonic vibration assisted brazing superhard abrasive grinding wheel device according to claim 2, wherein one end of a shell of the ultrasonic vibration system is hollow and sleeve-shaped and is used for placing a piezoelectric ceramic transducer (14) and an amplitude transformer (15), and four threaded holes are uniformly distributed in the end face along the circumferential direction and are used for connecting the amplitude transformer (15); the other end is a solid shaft, a key groove is formed in the end portion of the solid shaft, the solid shaft penetrates through a bearing in the support frame (10), the end portion of the solid shaft is connected to the driven gear (9), a flange plate is arranged in the middle of the solid shaft, four threaded holes are uniformly distributed in the circumferential direction, and the solid shaft is used for being connected with the secondary coil (2).

5. The apparatus of claim 2, wherein the protective cover is made of two parts, divided into left and right parts, and has a threaded hole and a pair of water inlets and outlets on the side wall, a pair of air inlets and outlets and a disc solid shaft inlet and outlet on the front and rear walls, a high frequency induction heating head inlet and outlet on the top, a partition plate on the middle and lower part, and a guide rail on the bottom.

6. An ultrasonic vibration assisted brazing multiple superabrasive grinding wheel device according to claim 5, wherein the semi-cooling rings are semicircular, hollow, closed at end faces, open at upper and lower ends with water inlet and outlet ports, and the side support end is provided with a threaded hole by which the two semi-cooling rings are symmetrically fixed to the inner wall of the protective cover (4) by means of bolts.

7. The device for ultrasonically vibration-assisted brazing of multiple superabrasive grinding wheels according to claim 1, wherein the disc extends to form a solid shaft, threaded holes are formed in the antinodes of the disc, more than one threaded hole is formed in one circle of each antinode, and the threaded holes can be used for directly connecting the small grinding head or connecting the large grinding wheel through the connecting mandrel.

8. The device for ultrasonically vibration-assisted brazing of multiple superabrasive grinding wheels according to claim 7, wherein the connecting mandrel is a stepped shaft, the large end is a thread and a small section of smooth surface in sequence, and the small end is transited by the smooth surface after the thread.

9. The method for brazing the superabrasive grinding wheels with the assistance of ultrasonic vibration of the device for brazing a plurality of superabrasive grinding wheels with the assistance of ultrasonic vibration according to claim 1, is characterized by comprising the following steps:

(1) the motor is started, the driving gear is driven to rotate by the driving force provided by the motor, the ultrasonic vibration system is driven to rotate by the reduction of the meshed driven gear, and in the process, the primary coil and the secondary coil of the wireless transmission system can realize the wireless transmission of high-frequency oscillation electric signals;

(2) the transducer converts the high-frequency oscillation electrical signal into mechanical vibration and then drives the amplitude transformer to vibrate, and the amplitude transformer amplifies and transmits the vibration to the disc at the small end part, so that the disc generates axial vibration;

(3) according to the manufacturing requirement, a plurality of small grinding heads or a large-diameter grinding wheel is connected to the position of an antinode on the disc;

(4) brazing by using a high-frequency induction heating head extending into the protective cover; meanwhile, water is introduced into the semi-cooling ring, and the grinding wheel is cooled by utilizing the heat exchange of continuous water inlet and outlet; the high-purity Ar gas continuously entering and exiting the protective cover through the gas inlet and outlet (22) plays a role in gas protection, and the partition plate at the middle lower part can play a good role in sealing.

Technical Field

The invention belongs to the field of ultrasonic technology application and ultrasonic welding, and particularly relates to a method and a device for brazing multiple superhard abrasive grinding wheels by ultrasonic vibration assistance.

Technical Field

Ordinary high-frequency induction brazing is little because of the metal melting region when the welding, the cooling is fast, cause welding seam metal chemical composition to distribute inhomogeneously easily, thereby form the segregation defect, take place the overburning phenomenon sometimes in welding process, can lead to the welding seam pit and pinhole to appear, in addition, high-frequency induction welding heat affected zone is too wide, the welding seam burr is too high, there is the clamp sediment, the oxide film on base metal and brazing filler metal surface also can hinder the wetting of liquid brazing filler metal on base metal surface and spread.

Ultrasonic technology is increasingly used for joining materials because of its unique advantages. The high temperature and high pressure generated by the ultrasonic cavitation effect enable a plurality of tiny local reactions to be formed inside the melted brazing filler metal, so that the brazing filler metal layer is more uniform and finer in structure. The heat transfer that melts the brazing filler metal can be accelerated to the one hand under the ultrasonic vibration condition, makes temperature field distribution more even, plays the effect that reduces residual stress, and on the other hand can melt the motion of brazing filler metal with higher speed, is favorable to spreading to solid-state granule, makes the brazing filler metal layer level and smooth more.

Zhang Ming 29764, and the like, in the text of 'growth and fracture of ultrasonic cavitation bubbles in a thin layer of liquid brazing filler metal', the growth and fracture conditions of the cavitation bubbles of the brazing filler metal under the ultrasonic action are observed through a spreading test of the liquid brazing filler metal Sn-9Zn, and the phenomenon that the liquid brazing filler metal is subjected to gap filling under the ultrasonic action and is diffused in a fan shape is obtained. By means of Matlab language, on the basis of ultrasonic cavitation theory, growth and breakage of three liquid brazing filler metal cavitation bubbles of Sn-9Zn, Sn-0.7 Cu and Zn-5Al are simulated from the aspects of temperature, ultrasonic frequency, initial radius of the cavitation bubbles, maximum temperature and maximum pressure when the cavitation bubbles collapse, and movement conditions of the cavitation bubbles are obtained. The result shows that the higher the temperature is, the weaker the cavitation effect is, the ultrasonic frequency is increased, the cavitation effect is reduced, the smaller the initial radius of the cavitation bubbles is, the more obvious the cavitation effect of the cavitation bubbles is, the maximum collapse temperature of the cavitation bubbles is in direct proportion to the adiabatic index, and the maximum collapse pressure is in inverse proportion to the adiabatic index and the temperature of the reaction system. In the present document, "current state of the art of ultrasonic brazing", the progress of two types of studies, front and rear, of ultrasonic-excited liquid solder brazing and ultrasonic-excited solid mother material is summarized. It is also pointed out that the research of the ultrasonic brazing at present mainly focuses on the research of mechanical properties and microstructures of welded joints of various materials and the research of a breaking mechanism of an oxide film, the research of the ultrasonic on the wetting influence of the brazing filler metal and the ultrasonic brazing mechanism is not much, and the research direction in the future is suggested to be that: the ultrasonic brazing welding process research and the ultrasonic brazing mechanism of the new material and the new connecting material are continuously carried out, the wetting and spreading dynamics of the brazing filler metal and the propagation mechanism of ultrasonic waves in a weldment and the brazing filler metal are carried out, but no better suggestion is provided for the improvement of an ultrasonic brazing device. The article "ultrasonic assisted brazing acoustic field and cavitation effect simulation research" by the great article of the Tang Dynasty states that "in the welding process, introduction of ultrasonic waves can cause acoustic cavitation effect in the liquid brazing filler metal, and the cavitation bubbles can form local high temperature, high pressure and micro jet after being broken, and can break the base metal and the oxide film on the surface of the brazing filler metal to promote the wetting and spreading of the liquid brazing filler metal on the surface of the base metal".

The invention patent application with publication number CN113000967A of Beijing university of nursing Engineers discloses a method and a device for ultrasonic assisted brazing of a microminiature superhard cutter. The ultrasonic auxiliary brazing device for the micro-miniature superhard cutter comprises a clamping device, a measuring device, an ultrasonic auxiliary device and a high-frequency brazing device, the cutter handle and the cutter head are accurately clamped through the clamping device, the measuring device measures temperature and pressure in real time, the brazing quality of the micro-miniature superhard cutter is improved by using a high-frequency brazing technology under the assistance of ultrasonic, the ultrasonic auxiliary brazing device is simple in structure and convenient to operate, and the welding performance of the micro-miniature superhard cutter is greatly improved.

Granted patent publication No. CN111659967A, owned by the university of south and middle, provides an ultrasonic brazing action composite lock-weld connection apparatus and method, comprising: the electric spark heating circuit comprises an alternating current power supply, a switch, an adjustable resistor, an electric spark anode and an electric spark cathode; the ultrasonic brazing device comprises an ultrasonic brazing device body, wherein a base is arranged at the lower end of the ultrasonic brazing device body, a stamping device is arranged on the base and connected with an electric spark anode, a controller is arranged at the top end of the stamping device, the first end of the controller is electrically connected with an alternating current power supply, and the second end of the controller is electrically connected with an ultrasonic generator. The double heating method of electric spark heating and ultrasonic vibration friction heating is adopted, the heating efficiency is high, the heating temperature can be controlled through an adjustable resistor and ultrasonic frequency, the operation is simple and convenient, and the temperature control is accurate; the plastic deformation capacity of the metal plate is improved, the strength and the reliability of the connecting joint are improved, and the high-strength alloy can be used for connecting high-strength alloys such as titanium alloy, magnesium alloy, aluminum alloy and the like.

An authorized patent with publication number CN110355437A owned by Wenzhou medical university provides an ultrasonic-assisted high-frequency induction brazing device of an electrical contact system, wherein a main body of the ultrasonic-assisted high-frequency induction brazing device is driven by a six-index cam divider, six assembling and processing stations are sequentially arranged on the periphery of a working table of the cam divider, and the same positioning die is arranged on each assembling and processing station. The ultrasonic-assisted high-frequency induction brazing device of the electrical contact system specifically comprises a contact bridge feeding assembly, a dripping soldering paste assembly, a contact feeding assembly, a high-frequency induction brazing assembly, a CCD industrial camera assembly, a blanking assembly, an electric sucker assembly and a cam divider assembly. The device is through ingenious, reasonable structural design for integrated high frequency induction heat source, the double complex energy field of ultrasonic vibration in compact space, make respectively before welding, weld in, weld the processing that the back carries out the optimization to the welding position through process programming design, and degree of automation is high, has realized giving consideration to when machining efficiency, the quality of brazing.

Although the superiority of the ultrasonic technology is widely embodied in the field of material connection, the ultrasonic vibration is utilized to manufacture the high-performance brazed super-hard abrasive grinding wheel, so that the research on high-efficiency and high-quality grinding processing is less, in addition, in the common high-frequency induction brazing device, the grinding wheel is directly connected with the amplitude transformer, the ultrasonic vibration auxiliary brazing of a single grinding wheel can only be realized, the efficiency is lower, a set of new high-frequency induction brazing device needs to be redesigned when the grinding wheels with other sizes or types are brazed, the cost is higher, and therefore, equipment capable of performing the ultrasonic vibration auxiliary brazing of various grinding wheels needs to be researched and developed.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the device and the method for assisting in brazing the multiple superhard abrasive grinding wheels through ultrasonic vibration, which have the advantages of simple structure and good working stability.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that:

an ultrasonic vibration assisted brazing device for various superhard abrasive grinding wheels comprises a power transmission system, a wireless transmission system, an ultrasonic vibration system and a disc which are sequentially connected from left to right, wherein the disc is arranged in a protective cover, and a semi-cooling ring and a high-frequency induction heat source are also arranged in the protective cover; the bottom of the protective cover is fixed with a guide rail seat which is fixed on the vibration isolation base.

The power transmission system comprises a motor and a pair of master-slave meshing gears, a driving gear is connected with a motor shaft, and a driven gear is connected with a rotating shaft at one end of the shell of the ultrasonic vibration system.

The wireless transmission system comprises a primary coil and a secondary coil, wherein the primary coil is fixed on a support frame through a flange plate, and the support frame is fixed on the vibration isolation base; the secondary coil is connected with the end face of the ultrasonic vibration system shell through a flange plate.

The ultrasonic vibration system comprises a shell, a piezoelectric ceramic transducer and an amplitude transformer, wherein a bearing is assembled in the middle of a rotating shaft of the shell and is fixed on a support frame; the disc is positioned in the protective cover and wrapped in the semi-cooling ring; the semi-cooling ring is symmetrically fixed on the inner wall of the protective cover through bolts.

According to the ultrasonic vibration assisted brazing device for the multiple superhard abrasive grinding wheels, the guide rail is arranged at the bottom of the protective cover, the dovetail groove is formed in the top of the guide rail seat, and the guide rail and the dovetail groove are fixed through matching of the guide rail and the dovetail groove.

In the ultrasonic vibration assisted brazing multiple superhard abrasive grinding wheel device, one end of a shell of the ultrasonic vibration system is hollow and is in a sleeve shape and used for placing the piezoelectric ceramic transducer and the amplitude transformer, and four threaded holes are uniformly distributed in the end surface along the circumferential direction and used for connecting the amplitude transformer; the other end is a solid shaft, a key groove is formed in the end portion of the solid shaft, the end portion of the solid shaft penetrates through a bearing in the supporting frame, the end portion of the solid shaft is connected to the driven gear, a flange plate is arranged in the middle of the solid shaft, four threaded holes are evenly distributed in the middle of the solid shaft along the circumferential direction, and the solid shaft is used for being connected with an auxiliary side coil.

The protection cover is composed of two parts, the left part and the right part are equally divided, the side wall is provided with a threaded hole and a pair of water inlets and water outlets, the front wall and the rear wall are provided with a pair of water inlets and water outlets and an inlet and an outlet of a disc solid shaft, the top is provided with an inlet and an outlet of a high-frequency induction heating head, the middle lower part is provided with a partition plate, and the bottom is provided with a guide rail.

According to the ultrasonic vibration assisted brazing multiple superhard abrasive grinding wheel device, the semi-cooling rings are semicircular, hollow and closed in end faces, the upper end and the lower end of each semi-cooling ring are provided with the water inlet and the water outlet, the side supporting end is provided with the threaded hole, and the two semi-cooling rings are symmetrically fixed on the inner wall of the protective cover through the threaded hole by using the bolts.

According to the ultrasonic vibration assisted brazing multiple superhard abrasive grinding wheel device, the disc extends out of the solid shaft, threaded holes are formed in the antinodes of the disc, 6 threaded holes are formed in the periphery of each antinode, the threaded holes can be directly connected with the small grinding head, and the large-size grinding wheel can also be connected with the core shaft.

According to the ultrasonic vibration assisted brazing multiple superhard abrasive grinding wheel device, the connecting mandrel is a stepped shaft, the large end is a thread line and a small section of smooth surface in sequence, and the small end is in smooth surface transition after the thread line.

The ultrasonic vibration assisted method for brazing the superhard abrasive grinding wheels based on the ultrasonic vibration assisted brazing device for multiple superhard abrasive grinding wheels comprises the following steps:

(1) the motor is started, the driving gear is driven to rotate by the driving force provided by the motor, the ultrasonic vibration system is driven to rotate by the reduction of the meshed driven gear, and in the process, the primary coil and the secondary coil of the wireless transmission system can realize the wireless transmission of high-frequency oscillation electric signals;

(2) after the transducer converts the high-frequency oscillation electrical signal into mechanical vibration, the amplitude transformer is driven to vibrate, and the amplitude transformer amplifies and transmits the vibration to the disc substrate at the small end part, so that the disc generates axial vibration;

(4) according to the manufacturing requirement, a plurality of small grinding heads or a large-diameter grinding wheel are connected to the antinode of the disc;

(3) brazing by using a high-frequency induction heating head extending into the protective cover; meanwhile, water is introduced into the semi-cooling ring, and the grinding wheel is cooled by utilizing the heat exchange of continuous water inlet and outlet; the high-purity Ar gas continuously entering and exiting the protective cover through the gas inlet and outlet plays a role in gas protection, and the partition plates at the middle lower part can play a good role in sealing.

Has the advantages that:

(1) in the device provided by the invention, the disc is fixed at one end of the ultrasonic vibration system and is wrapped by the cooling ring and the protective cover; the power transmission system provides power for the ultrasonic vibration system and the grinding wheel to rotate; the wireless transmission system may provide an electrical signal to the ultrasonic vibration system as it rotates. The device can rotate the grinding wheel, simultaneously carry out ultrasonic vibration along the axial direction of the grinding wheel, and simultaneously realize the brazing of various superhard abrasive grinding wheels under the action of a high-frequency induction heat source.

(2) According to the invention, ultrasonic vibration is applied to the grinding wheel in the process of grinding wheel brazing, so that the fluidity of the brazing filler metal in the high-temperature brazing process can be improved, the wettability of the brazing filler metal and abrasive particles is enhanced, the holding strength of the abrasive particles is further improved, and a support is provided for preparing a high-performance brazed grinding wheel.

(3) The ultrasonic vibration assisted brazing grinding wheel device provided by the invention can be used for rapidly brazing more than one grinding wheel by utilizing one set of device, and at most 12 small grinding heads or one large grinding wheel, so that the brazing efficiency is improved, the operation is simple, the cost for manufacturing a plurality of sets of devices is saved, and the ultrasonic vibration assisted brazing grinding wheel device has good economic benefit.

Drawings

FIG. 1 is a schematic diagram of the overall construction of an ultrasonic vibration assisted brazing multiple superabrasive grinding wheel apparatus of the present invention;

FIG. 2 is a top view of the overall structure of an ultrasonic vibration assisted brazing multiple superabrasive grinding wheel apparatus of the present invention;

FIG. 3 is a schematic structural view of the support stand 10 of FIG. 2;

fig. 4 is a schematic structural diagram of the primary winding 11 and the secondary winding 12 in fig. 2;

FIG. 5 is a schematic structural view of the housing 13, piezoelectric ceramic transducer 14 and horn 15 of the ultrasonic vibration system of FIG. 1;

FIG. 6 is a schematic view showing the internal structure of the protective cover 4 in FIG. 1;

FIG. 7 is a cross-sectional view of the protective cover 4 and its internal structure of FIG. 1;

FIG. 8 is a schematic structural view of a pair of semi-cooling rings 18 of FIG. 6;

FIG. 9 is a schematic view of the rail housing 5 of FIG. 1;

FIG. 10 is a schematic view of the structure of the disk 17 of FIG. 6;

FIG. 11 is a waveform of vibration of the disk 17 of FIG. 10;

FIG. 12 is a schematic view of the antinodes of the disk 17 of FIG. 10 corresponding to the threaded holes;

fig. 13 is a schematic view of the assembly of the disc 17 with the small grinding stone 30;

FIG. 14 is a schematic view of the assembly of the disc 17 with the large grinding wheel 31;

fig. 15 is a schematic structural view of the small grinding stone 30 in fig. 13;

FIG. 16 is a schematic view of the construction of the large grinding wheel 31 of FIG. 14;

fig. 17 is a schematic view of the connecting mandrel 32 of fig. 14.

Wherein: a power transmission system-1, a wireless transmission system-2, an ultrasonic vibration system-3, a protective cover-4, a guide rail seat-5, a vibration isolation base-6, a motor-7, a driving gear-8, a driven gear-9, a support frame-10, a primary coil-11, a secondary coil-12, a shell-13, a transducer-14, an amplitude transformer-15, a high-frequency induction heating head-16, a disc-17, a semi-cooling ring-18, a threaded hole-19, a water inlet and outlet-20, a water inlet and outlet-21, a gas inlet and outlet 22, a disc solid shaft-23, a heating head inlet and outlet-24, a partition plate-25, a guide rail-26, a threaded hole-27, a dovetail groove-28, a platform-29, a small grinding head-30, a vibration isolation base-6, a motor-7, a driving gear-8, a driven gear-9, a support frame-10, a primary coil-11, a secondary coil-12, a shell-13, a transducer-14, an amplitude transformer-15, a high-frequency induction heating head-16, a high frequency induction heating head-25, a guide rail-26, a screw hole-27, a dovetail groove-27, a small grinding head, a power transmission system, a, A large grinding wheel-31 and a connecting mandrel-32.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

Example 1

Fig. 1 is a schematic view of the overall structure of an ultrasonic vibration assisted brazing multiple superabrasive grinding wheel apparatus of the present invention, and fig. 2 is a plan view of the overall structure of an ultrasonic vibration assisted brazing multiple superabrasive grinding wheel apparatus of the present invention. Referring to fig. 1 and 2, the device mainly comprises a power transmission system 1, a wireless transmission system 2, an ultrasonic vibration system 3, a protective cover 4, and a vibration isolation base 6 fixed on a guide rail seat 5, which are connected in sequence from left to right and are connected with a track at the bottom of the protective cover 4 in a matching manner.

Specifically, the power transmission system comprises a motor 7 and a pair of master-slave meshing gears, the two gears are meshed, a driving gear is connected with a shaft of the motor 7, and a driven gear is connected with a rotating shaft at one end of a shell of the ultrasonic vibration system.

The wireless transmission system comprises a primary coil and a secondary coil, the primary coil is fixed on the support frame through a flange, and the secondary coil is connected with the end face of the ultrasonic vibration system shell through the flange.

Fig. 3 is a schematic structural diagram of the support frame 10 in fig. 2, the support frame 10 is fixed on the vibration isolation base 6 and is divided into an upper part and a lower part, a circular hole is formed in the middle, bosses are arranged beside the circular hole and are respectively provided with a threaded hole, and the support frame can be clamped by bolts and is used for supporting a bearing of a solid shaft of the shell 13 of the ultrasonic vibration system. 4 threaded holes are uniformly distributed in the support frame 10 along the periphery of the round hole, and the primary coil 11 is connected with the support frame 10 through a flange plate.

Fig. 4 is a schematic structural diagram of the primary coil 11 and the secondary coil 12 in fig. 2, in which coils are embedded inside the bosses, and threaded holes are uniformly distributed around the flange for connecting with the support frame 10 and the ultrasonic vibration system shell 13.

Fig. 5 is a schematic structural diagram of the housing 13, the piezoelectric ceramic transducer 14 and the horn 15 of the ultrasonic vibration system in fig. 1, one end of the housing 13 of the ultrasonic vibration system is a solid shaft, a key groove is formed in the end of the shaft, the end of the shaft penetrates through a bearing in the support frame 10, the end of the shaft is connected to the driven gear 9, a flange plate is arranged in the middle of the housing and four threaded holes are uniformly distributed in the circumferential direction for connecting the secondary coil 12, the other end of the housing is hollow and sleeve-shaped for placing the piezoelectric ceramic transducer 14 and the horn 15, and four threaded holes are uniformly distributed in the circumferential direction on the end surface for connecting the horn 15. One end of the piezoelectric ceramic transducer 14 is connected with a variable amplitude rod 15 and is positioned in the shell 13. The large end of the amplitude transformer 15 is connected with the piezoelectric ceramic transducer 14, a flange plate is arranged at the node position, threaded holes are uniformly distributed on the periphery of the flange plate and used for connecting the end face of the shell 13 of the ultrasonic vibration system, and a conical hole is formed in the small end of the flange plate and connected with the solid shaft of the disc 17 through a spring chuck.

Fig. 6 is a schematic diagram of the internal structure of the protective cover 4 in fig. 1, the protective cover 4 is composed of two parts, the left and right parts are equally divided and have symmetrical structure, the top part is provided with a mounting hole 24 of the high-frequency induction heating head 16, the side wall is provided with a threaded hole 19 (see fig. 7) and a pair of water inlets and outlets 20 (see fig. 7), the front and rear walls are provided with a pair of air inlets and outlets 22 and a disc solid shaft 23 inlet and outlet, the grinding wheel 17 is positioned in the package of the two semi-cooling rings 18, the lower part is provided with a partition plate 25, and the bottom part is provided with a guide rail 26.

Fig. 7 is a cross-sectional view of the protective cover 4 and its internal structure in fig. 1, the side wall of the protective cover 4 is provided with a threaded hole 19, the side supporting end of the half cooling ring 18 is provided with a threaded hole 27 (see fig. 8), two half cooling rings 18 can be symmetrically fixed on the inner wall of the protective cover 4 by bolts, and the water inlet and outlet 21 (see fig. 8) of the half cooling ring 18 correspond to the water inlet and outlet 20 on the side wall of the protective cover 4 one by one.

Fig. 8 is a schematic structural view of a pair of semi-cooling rings 18 in fig. 6, wherein the semi-cooling rings 18 are semi-circular, hollow, closed in end surface, provided with water inlet and outlet ports 21 at upper and lower ends, and provided with a threaded hole 27 at a side supporting end.

Fig. 9 is a schematic structural diagram of the guide rail seat 5 in fig. 1, the upper surface of the guide rail seat 5 is provided with a dovetail groove 28, the dovetail groove is matched with a guide rail 26 at the bottom of the protective cover 4, the bottom is provided with a platform 29, the platform 29 is provided with a threaded hole, the threaded hole is fixed with the vibration isolation base 6 by using a bolt, and the guide rail seat 5 adopts a hollow structure.

Fig. 10 is a schematic structural view of the disc 17 of fig. 6, which extends out of a solid shaft and can be connected with the small end of the amplitude transformer 15 by using a collet chuck, and 6 threaded holes are formed in one circle of each antinode position of the disc, so that the disc can be directly connected with a small grinding head 30 or connected with a large grinding wheel 31 through a connecting mandrel 32.

Fig. 11 is a waveform diagram of the vibration of the disk 17 in fig. 10.

Fig. 12 is a schematic view of the disk 17 of fig. 10 corresponding to the antinode and the threaded hole, and the threaded hole is formed in the antinode by one turn.

Fig. 13 is a schematic view showing the assembly of the disc 17 with the small grinding stone 30, and the shaft end of the small grinding stone 30 is provided with a screw thread to be directly connected with the disc 17.

Fig. 14 is a schematic view showing the assembly of the disc 17 and the large grinding wheel 31, the disc 17 and the large grinding wheel 31 can be connected by a connecting mandrel 32, the large end of the connecting mandrel 32 is connected with the screw thread of the disc 17, and the small end penetrates through the grinding wheel base body to fix the large grinding wheel 31 by a nut.

Fig. 15 is a schematic view showing the construction of the small grinding stone 30 of fig. 13, the shaft end being provided with a screw thread for coupling with the disc 17.

Fig. 16 is a schematic structural diagram of the large grinding wheel 31 in fig. 14, the middle of which is provided with a round hole for being assembled on a spindle of a machine tool, and twelve round holes are provided corresponding to the threaded holes of the disc 17 and connected with the disc 17 through a connecting mandrel 32.

Fig. 17 is a schematic structural view of the connecting mandrel 32 in fig. 14, the connecting mandrel 32 is a stepped shaft, the large end is provided with threads and connected with the disc 17 by using the threads, the small end is also provided with threads, and the large grinding wheel 31 is fixed by a nut after penetrating through the grinding wheel base body.

An operation process of an ultrasonic vibration assisted brazing multiple superhard abrasive grinding wheel device comprises the following steps:

(1) the motor is started, the driving gear is driven to rotate by the driving force provided by the motor, the ultrasonic vibration system is driven to rotate by the reduction of the meshed driven gear, and in the process, the primary coil and the secondary coil of the wireless transmission system can realize the wireless transmission of high-frequency oscillation electric signals.

(2) The transducer converts the high-frequency oscillation electrical signal into mechanical vibration and then drives the amplitude transformer to vibrate, and the amplitude transformer amplifies and transmits the vibration to the disc at the small end part, so that the disc generates axial vibration.