WO2022077530A1

WO2022077530A1 - Ultrasonic machining apparatus and ultrasonic spindle thereof

Info

Publication number: WO2022077530A1
Application number: PCT/CN2020/121759
Authority: WO
Inventors: 颜炳姜; 李伟秋
Original assignee: 汇专机床有限公司; 汇专科技集团股份有限公司
Priority date: 2020-10-14
Filing date: 2020-10-19
Publication date: 2022-04-21
Also published as: CN112317775A; CN112317775B

Abstract

An ultrasonic spindle, comprising a spindle housing (1), a rotating shaft (2), a front end cover (3), a transmitting frame (4), and an ultrasonic wireless transmitting device (5). The rotating shaft (2) is rotatably provided in the spindle housing (1) in a penetrating mode and a mounting hole is formed on the front end surface of the rotating shaft (2); the front end cover (3) is provided on the front end of the spindle housing (1) and is provided around the rotating shaft (2); the transmitting frame (4) is directly mounted on the front end surface of the front end cover (3) and is provided around the rotating shaft (2); a first accommodating groove (401) surrounding the rotating shaft (2) is formed on the front end surface of the transmitting frame (4); the transmitting frame (4) is connected to the front end cover (3) by means of a bolt, so as to facilitate assembling and disassembling; and the ultrasonic wireless transmitting device (5) is provided in the first accommodating groove (401), and comprises transmitting coils (501) provided around the rotating shaft (2) and transmitting ferrites (502) used for accommodating the transmitting coils (501). The ultrasonic spindle is excellent in performance, good in machining effect, wide in application range, capable of machining multiple materials, and long in service life. Further comprised is an ultrasonic machining apparatus using the foregoing ultrasonic spindle.

Description

A kind of ultrasonic processing equipment and its ultrasonic spindle

technical field

The invention relates to the technical field of ultrasonic processing, in particular to an ultrasonic processing equipment and an ultrasonic spindle thereof.

Background technique

The introduction of high-frequency vibration machining mechanism in the process of machining operations can not only improve the surface roughness of the cutting surface and improve the machining accuracy, but also reduce the cutting resistance and increase the life of the tool, so it is widely used. One such application is the ultrasonic spindle.

Existing ultrasonic spindles include stationary parts, rotating parts, bearing assemblies and ultrasonic transmission devices. Among them, the fixed components include spindle housing, front end cover and other related components. Rotating parts include related parts such as rotating shafts. The ultrasonic transmission device may be an ultrasonic wireless transmitting device or an ultrasonic wired transmission device. At present, the ultrasonic wireless transmitting device is generally suspended outside the main shaft through a hoop, and the installation accuracy is low, resulting in unstable electrical conduction between it and the ultrasonic wireless receiving device, which affects the processing effect of the tool.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an ultrasonic processing equipment and its ultrasonic spindle with excellent performance, good processing effect, wide application range, many machinable materials and long service life.

In order to achieve the above object, the present invention provides an ultrasonic spindle, which includes:

main shaft housing;

a rotating shaft, which is rotatably penetrated in the main shaft housing, and a front end surface of the rotating shaft is provided with a mounting hole;

a front end cover, which is arranged at the front end of the main shaft housing and is arranged around the rotating shaft;

a launch rack, which is directly mounted on the front end surface of the front end cover and arranged around the rotating shaft, and the front end surface of the launch rack is provided with a first accommodating groove surrounding the rotating shaft;

An ultrasonic wireless transmitting device, which is arranged in the first accommodating groove, and the ultrasonic wireless transmitting device comprises a transmitting coil arranged around the rotating shaft and a transmitting ferrite for accommodating the transmitting coil;

The volume of the first accommodating slot is V cubic millimeters, the inner diameter of the first accommodating slot is D ₁ millimeters, the volume of the transmitting coil is V ₁ cubic millimeters, and the number of turns of the transmitting coil is N, The cross-sectional area of the single-turn wire forming the transmitting coil is S square millimeters, the inner diameter of the transmitting frame is D ₂ millimeters, and the volume of the transmitting ferrite is V ₂ cubic millimeters, and the above parameter values satisfy the following functional relationship :

Wherein, V ₂ =V ₁ K ₁ , 10≤N≤150, 0.02≤S≤2.6, 1≤K ₁ ≤7, 1<K ₂ ≤3, 0.5≤K ₃ ≤1.5, K ₁ , K ₂ , K ₃ is the correction factor.

In some embodiments of the present application, the emitting ferrite includes an annular bottom plate located at the bottom of the first accommodating groove and an annular inner side plate close to the inner side surface of the first accommodating groove. The radial thickness of the inner plate is C mm, 0.5≤C≤5.

In some embodiments of the present application, 30≤N≤120.

In some embodiments of the present application, the axial thickness of the launch frame is T mm, the axial depth of the first accommodating groove is H mm, and H/T=0.2˜0.7.

In some embodiments of the present application, the radial thickness of the launch frame is M millimeters, the radial width of the first accommodating groove is L millimeters, and L/M=0.2˜0.9.

In some embodiments of the present application, the transmitting frame has a hole through which a power cord connected to the transmitting coil passes.

In some embodiments of the present application, the holes extend along the radial direction of the launch frame.

In some embodiments of the present application, the ultrasonic spindle further includes:

a bearing, which is arranged between the outer side of the rotating shaft and the inner side of the main shaft housing;

an inner pressure ring, which is sleeved on the rotating shaft and compresses the inner ring of the bearing from front to back;

an outer pressure ring, which surrounds the outer circumference of the inner pressure ring and is pressed by the front end cover to the outer ring of the bearing from front to back.

In some embodiments of the present application, the main shaft housing has a first air passage, an air cavity is provided between the inner side of the front end cover and the outer side of the inner pressure ring, and the front end cover has a connection with the first air passage. an airway and a second airway of the air cavity.

In some embodiments of the present application, the inner diameter of the first air passage is 1 mm to 6 mm, and the inner diameter of the second air passage is 1 mm to 6 mm.

In some embodiments of the present application, the air cavity is provided with a ventilation ring surrounding the outer periphery of the inner pressure ring, and a first gap is provided between the inner side of the ventilation ring and the outer side of the inner pressure ring, so The vent ring has a vent hole communicating with the second air passage and the first gap.

In some embodiments of the present application, the width of the first gap ranges from 0.1 mm to 1 mm.

In some embodiments of the present application, the ventilation holes are provided in multiples and are evenly distributed along the circumferential direction of the ventilation ring.

In some embodiments of the present application, a sealing groove surrounding the rotating shaft is formed on the rear end surface of the launch frame corresponding to the position of the ventilation ring, and a sealing ring abutting against the ventilation ring is arranged in the sealing groove. .

In some embodiments of the present application, the outer side surface of the inner pressure ring has annular bosses, and the annular bosses are provided in a plurality and distributed along the axial direction of the inner pressure ring.

Based on the same purpose, the present invention also provides a kind of ultrasonic processing equipment, which comprises:

In the above-mentioned ultrasonic spindle, the spindle housing has a first air passage, an air cavity is provided between the inner side of the front end cover and the outer side of the rotating shaft, and the front end cover has a connection between the first air passage and the outside of the rotating shaft. Describe the second airway of the air cavity;

Ultrasonic tool handle, which includes a tool handle body, a receiving frame and an ultrasonic wireless receiving device, the rear end of the tool handle body is inserted in the installation hole, and the outer side of the tool handle body and the inner side of the transmitting frame There is a second gap communicating with the air cavity, the receiving frame is sleeved on the handle body, and the rear end surface of the receiving frame is provided with a second gap opposite to the first accommodating groove. Two accommodating grooves, the ultrasonic wireless receiving device is set in the second accommodating groove, and a third gap communicating with the second gap is set between the ultrasonic wireless receiving device and the ultrasonic wireless transmitting device .

In some embodiments of the present application, the width of the second gap is 0.2 mm to 5 mm.

The invention provides a kind of ultrasonic spindle, compared with prior art, its beneficial effect is:

On the one hand, by arranging the transmitting frame directly installed on the front end surface of the front end cover, the ultrasonic wireless transmitting device can be integrated on the ultrasonic spindle, and there is no need to hang and install it through a suspension bracket such as a hoop, so that the installation accuracy of the ultrasonic wireless transmitting device is improved. High, better stability, furthermore, the electrical conduction between the ultrasonic wireless transmitting device and the ultrasonic wireless receiving device is more stable and reliable, which can effectively improve the processing effect of the tool; in addition, the transmitting frame can also serve as a decorative cover for the ultrasonic spindle , by covering the front end cover to improve the aesthetics, and at the same time, it can also play a dustproof and waterproof sealing effect; and because the launcher is directly installed on the front end face of the front end cover, the structure is compact, so compared with the hanging bracket, The launch frame is not easy to interfere with other structures outside the ultrasonic spindle;

On the other hand, the volume of the first accommodating slot is V cubic millimeters, the number of turns of the transmitting coil is N, the cross-sectional area of the single-turn wire is S square millimeters, the inner diameter of the first accommodating groove is D ₁ mm, and the transmitting ferrite The volume of is V ₂ cubic millimeters, V ₂ =V ₁ K ₁ , the above parameter values satisfy the following functional relationship:

V=[πNSD ₁ (1+K ₁ )]K ₂ ;

1≤K ₁ ≤7, 1<K ₂ ≤3.

On this basis, when 10≤N≤150, 0.02≤S≤2.6, and the inner diameter of the launch rack 4 is D ₂ mm, the volume value V of the first accommodating groove and the inner diameter value D ₂ of the launch rack satisfy the following functional relationship:

When 0.5≤K ₃ ≤1.5, the number of turns of the transmitting coil of the ultrasonic wireless transmitting device, the cross-sectional area of the single-turn wire, the volume of the transmitting ferrite, and the volume of the first accommodating slot are properly matched. In this way, under the condition of the same power supply, the ultrasonic wireless transmitter not only has larger power capacity, higher effective output power, and higher wireless transmission efficiency, but also can improve the maximum amplitude of the tool during the working process and increase the The adjustment range of large amplitude expands the application range of the ultrasonic spindle, increases the types of machinable materials, and has small heat generation, stable performance and long service life.

In addition, the present invention also provides an ultrasonic processing equipment, because it adopts the above-mentioned ultrasonic spindle, so it has excellent performance, good processing effect, wide application range, many materials that can be processed, and long service life.

Description of drawings

1 is a schematic structural diagram of an ultrasonic processing equipment according to an embodiment of the present invention;

Fig. 2 is the longitudinal sectional schematic diagram of the ultrasonic processing equipment of the embodiment of the present invention;

Fig. 3 is the enlarged schematic diagram of I region in Fig. 2;

4 is a schematic structural diagram of a launch stand according to an embodiment of the present invention;

5 is a schematic structural diagram of an emitter ferrite according to an embodiment of the present invention;

6 is a schematic longitudinal cross-sectional view of a launch frame and a launch ferrite according to an embodiment of the present invention;

7 is a schematic structural diagram of a ventilation ring according to an embodiment of the present invention;

8 is a schematic structural diagram of an inner pressure ring according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an ultrasonic tool handle according to an embodiment of the present invention.

In the figure: 100, ultrasonic spindle; 200, ultrasonic tool holder; 1, spindle housing; 101, housing body; 102, front bearing seat; 103, first air passage; 2, rotating shaft; 3, front end cover; 301 4, the second airway; 4, the launch frame; 401, the first accommodating groove; 402, the hole; 403, the sealing groove; 5, the ultrasonic wireless transmitting device; 501, the transmitting coil; 502, the transmitting ferrite; Bottom plate; 5022, annular inner plate; 6, bearing; 7, inner pressure ring; 701, annular boss; 8, outer pressure ring; 9, air cavity; 10, ventilation ring; 1001, ventilation hole; 11, first Gap; 12. Tool handle body; 13. Receiving frame; 1301. Second accommodating groove; 14. Ultrasonic wireless receiving device; 15. Second gap; 16. Third gap.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

It should be pointed out that the terms "first" and "second" are only used for descriptive purposes to distinguish the same type of technical features, and should not be construed as indicating or implying the relative importance, order and quantity of these technical features, that is, , the "first" technical feature can be referred to as the "second" technical feature, and the "second" technical feature can also be referred to as the "first" technical feature. A technical feature may explicitly or implicitly include one or more of the technical feature. Also, unless stated otherwise, the meaning of "plurality" refers to two or more.

It should be emphasized that, in the description of this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected" and "abutted" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations. In addition, the terms "front end" and "rear end" refer to the end of the tool that is close to the workpiece being machined as the "front end" and the end farther away from the workpiece being the "rear end" during use.

Referring to FIGS. 1 to 6, an embodiment of the present invention provides an ultrasonic spindle 100, which includes a spindle housing 1, a rotating shaft 2, a front end cover 3, a transmitting frame 4, and an ultrasonic wireless transmitting device 5; It is arranged in the main shaft housing 1, and the front end surface of the rotating shaft 2 is provided with a mounting hole; the front end cover 3 is arranged at the front end of the main shaft housing 1 and is arranged around the rotating shaft 2; the launch frame 4 is directly installed on the front end surface of the front end cover 3 And set around the rotating shaft 2, the front end face of the launch frame 4 is provided with a first accommodating groove 401 around the rotating shaft 2; the launch frame 4 and the front end cover 3 are connected by bolts to facilitate disassembly; the ultrasonic wireless transmitting device 5 is set in Inside the first accommodating slot 401 , it includes a transmitting coil 501 arranged around the rotating shaft 2 and a transmitting ferrite 502 for accommodating the transmitting coil 501 .

Based on the above structure, by arranging the transmitting frame 4 directly installed on the front end surface of the front end cover 3, the ultrasonic wireless transmitting device 5 can be integrated on the ultrasonic main shaft 100, and there is no need to hang and install it through a hanging bracket such as a hoop. The installation accuracy of the device 5 is higher and the stability is better, and further, the electrical conduction between the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 14 is more stable and reliable, which can effectively improve the processing effect of the tool; 4 can also be used as a decorative cover for the ultrasonic spindle 100, by covering the front end cover 3 to achieve the purpose of enhancing the aesthetics, and at the same time, it can also play a dustproof and waterproof sealing effect; and because the launch frame 4 is directly installed on the front end of the front end cover 3. The structure is compact, so compared with the suspension bracket, the transmitting frame 4 is less likely to interfere with other structures other than the ultrasonic spindle 100 .

Specifically, the volume of the first accommodating slot 401 is V cubic millimeters, the inner diameter of the first accommodating slot 401 is D ₁ millimeters, the volume of the transmitting coil 501 is V ₁ cubic millimeters, and the number of turns of the transmitting coil 501 is N, forming a transmitting coil The cross-sectional area of the single-turn wire of 501 is S square millimeters, the volume of the emitting ferrite 502 is V ₂ cubic millimeters, and V ₂ =V ₁ K ₁ , and the above parameter values satisfy the following functional relationship:

V=(V ₁ +V ₂ )K ₂ =[V ₁ (1+K ₁ )]K ₂ =[πNSD ₁ (1+K ₁ )]K ₂ ;

1≤K ₁ ≤7, 1<K ₂ ≤3.

On this basis, when 10≤N≤150, 0.02≤S≤2.6, and the inner diameter of the launcher 4 is D ₂ mm, the volume value V of the first accommodating groove 401 and the inner diameter value D2 of the launcher ₄ satisfy the following function relation:

When _{0.5≤K3≤1.5} , the number of turns of the transmitting coil 501 of the ultrasonic wireless transmitting device 5, the cross-sectional area value of the single-turn wire, the volume value of the transmitting ferrite 502, and the volume between them and the first accommodating groove 401 The values are properly matched, so that under the condition of the same power supply, the ultrasonic wireless transmitter 5 not only has larger power capacity, higher effective output power, and higher wireless transmission efficiency, but also can improve the working process of the tool. The maximum amplitude of the ultrasonic spindle is increased, the adjustment range of the amplitude is increased, the application range of the ultrasonic spindle 100 is expanded, the types of machinable materials are increased, and the calorific value is small, the performance is stable, and the service life is long. More preferably, 30≤N≤120.

In the above functional relationship, K ₁ , K ₂ , and K ₃ are correction coefficients; the inner diameter of the launch frame 4 is related to the specifications of the ultrasonic spindle 100 , and the corresponding ultrasonic spindles 100 of different specifications have different inner diameters of the launch frame 4 . It should be noted that the number of turns of the transmitting coil 501 is the number of turns of the guide wire around the rotating shaft 2, and the wire can be either a single-core wire or a multi-core wire. For example, one turn of the wire consists of five wire cores. In addition, the cross-section of the wire can be circular, triangular, rectangular, etc., or other irregular shapes, but no matter what shape the cross-section of the wire is, the cross-sectional area can be calculated according to its equivalent circle. , that is, if the wire diameter of the wire is D ₃ mm, there is S=π(D ₃ /2) ² .

In order to verify that the ultrasonic spindle 100 provided by the embodiment of the present invention can indeed increase the maximum amplitude of the tool compared with the prior art, the research and development personnel conducted two sets of tests: the first set of test objects were provided by the embodiment of the present invention with four different specifications. Ultrasonic spindle 100, Table 1 is the test result of the working state of its tool; the second group of test objects is the ultrasonic spindle 100 with the same specifications as the first group of test objects in the prior art, the difference is that their ultrasonic wireless transmitting devices 5 all pass The hoop is suspended and installed instead of the launcher 4, and the parameter values do not satisfy the above functional relationship. Table 2 shows the test results of the working state of the tool.

Table 1

Table 2

It can be seen from Table 1 and Table 2 that, under the same test conditions, the ultrasonic spindle 100 provided by the embodiment of the present invention has an obvious maximum amplitude of the tool compared with the ultrasonic spindle 100 using the suspended ultrasonic wireless transmitting device 5 in the prior art. larger, which is enough to show that the ultrasonic spindle 100 provided in the embodiment of the present invention has a larger amplitude adjustment range, a wider application range, and more types of machinable materials.

Optionally, as shown in FIGS. 5 and 6 , in this embodiment, the emitting ferrite 502 includes an annular bottom plate 5021 located at the bottom of the first accommodating groove 401 and a bottom plate 5021 close to the inner side of the first accommodating groove 401 . In the annular inner plate 5022 , the magnetic field lines generated by energizing the transmitting coil 501 pass through the annular side plate toward the end face of the ultrasonic wireless receiving device 14 . The radial thickness of the annular inner plate 5022 is C mm, and when 0.5≤C≤5, it can match the number of coil turns, the cross-sectional area value of the wire, and the volume value of the first accommodating groove 401 that satisfy the above functional relationship , so that the power capacity of the ultrasonic wireless transmitting device 5 is larger, the effective output power is higher, the wireless transmission efficiency is higher, the calorific value is smaller, and the performance is stable.

Optionally, as shown in FIG. 2 and FIG. 4 , in this embodiment, the transmitting rack 4 has a hole 402 that communicates with the first accommodating slot 401 for the power cable connected to the transmitting coil 501 to pass through; the hole 402 Extending along the radial direction of the launch frame 4 , of course, in other embodiments, the hole 402 may also extend in a direction inclined relative to the radial direction of the launch frame 4 .

Optionally, as shown in FIG. 6 , in this embodiment, the axial thickness of the launch frame 4 is T mm and the radial thickness is M mm, and the axial depth of the first accommodating groove 401 is H mm and the radial width is H mm. is L mm. Since the volume of the first accommodating groove 401 affects the volume of the launcher 4, in order to determine the launcher 4 with an appropriate volume, H/T=0.2-0.7, and L/M=0.2-0.9, at this time, the volume of the launcher 4 Appropriate, will not affect the performance of the ultrasonic spindle 100, and has good aesthetics.

It should be noted that the axial thickness of the launcher 4 refers to the distance between the front end surface and the rear surface of the launcher 4 , and the radial thickness of the launcher 4 refers to the distance between the outer side and the inner side of the launcher 4 , the axial depth of the first accommodating groove 401 refers to the distance between the groove bottom surface of the first accommodating groove 401 and the front end surface of the launch frame 4 , and the radial width of the first accommodating groove 401 refers to the inner side surface of the first accommodating groove 401 distance from the outer side. It should be understood that the above parameters are for the case where the launcher 4 is a cylindrical annular body or a conical annular body. Of course, the launcher 4 can also be of other irregular shapes. A ring or conical ring is used to measure the above parameter values.

2 and 3, the ultrasonic spindle 100 provided by the embodiment of the present invention further includes a bearing 6, an inner pressure ring 7 and an outer pressure ring 8; the bearing 6 is provided between the outer side of the rotating shaft 2 and the inner side of the main shaft housing 1; The inner pressure ring 7 is sleeved on the rotating shaft 2 and presses the inner ring of the bearing 6 from front to back; the outer pressure ring 8 surrounds the outer circumference of the inner pressure ring 7 and is pressed by the front end cover 3 to the outer surface of the bearing 6 from front to back. lock up. In this way, the bearing 6 can be reliably installed and easy to disassemble.

Optionally, as shown in FIGS. 2 and 3 , in this embodiment, the main shaft housing 1 has a first air passage 103 , and an air cavity 9 is provided between the inner side of the front end cover 3 and the outer side of the inner pressure ring 7 , The front end cover 3 has a second air passage 301 that communicates the first air passage 103 and the air cavity 9 . In this way, the gas introduced into the first air passage 103 is blown out through the second air passage 301 and the air cavity 9, and the continuous air flow forms a positive pressure seal, which can prevent impurities such as dust, chip particles, and water vapor from entering the interior of the ultrasonic spindle 100, Improve its stability and reliability, and at the same time, it can also enhance the heat dissipation effect and improve the working conditions of the ultrasonic spindle. Preferably, the inner diameter of the first air passage 103 is 1 mm to 6 mm, and the inner diameter of the second air passage 301 is 1 mm to 6 mm.

Optionally, as shown in FIGS. 2 and 3 , in this embodiment, the main shaft housing 1 includes a housing body 101 and a front bearing seat 102 mounted on the front end of the housing body 101 , and the front bearing seat 102 is used to install the bearing 6; The rear end surface of the front end cover 3 is in contact with the front end surface of the front bearing seat 102;

Optionally, as shown in FIG. 3 and FIG. 7 , in this embodiment, in order to make the air entering the air cavity 9 blow to the rotating shaft 2 evenly and powerfully, the air cavity 9 is provided with an inner pressure ring surrounding the inner pressure ring. 7. The ventilation ring 10 on the outer periphery has a first gap 11 between the inner side of the ventilation ring 10 and the outer side of the inner pressure ring 7. The ventilation ring 10 has a ventilation hole 1001 connecting the second airway 301 and the first gap 11. The ventilation hole 1001 is provided in plural and distributed uniformly along the circumferential direction of the ventilation ring 10 . Preferably, the width of the first gap 11 is 0.1 mm to 1 mm.

Optionally, as shown in FIGS. 2 and 3 , in this embodiment, in order to prevent impurities such as dust, chip particles, and water vapor from entering the ultrasonic spindle 100 from between the rear end surface of the launch frame 4 and the rear end surface of the front end cover 3 Inside, in order to prevent air leakage, a sealing groove 403 surrounding the rotating shaft 2 is formed on the rear end surface of the launch frame 4 corresponding to the position of the ventilation ring 10 .

Optionally, as shown in FIG. 2 and FIG. 8 , in this embodiment, in order to prevent impurities such as dust, chip particles, and water vapor from entering the interior of the ultrasonic spindle 100 through the first gap 11 , the outer surface of the inner pressure ring 7 has an annular shape. The bosses 701 and the annular bosses 701 are provided in multiples and are distributed at equal intervals along the axial direction of the inner pressure ring 7 .

Referring to FIGS. 1 , 2 and 9 , an embodiment of the present invention further provides an ultrasonic processing equipment, which includes an ultrasonic tool holder 200 and the above-mentioned ultrasonic spindle 100 ; the ultrasonic tool holder 200 includes a tool holder body 12 , a receiving frame 13 and an ultrasonic wave Wireless receiving device 14; the rear end of the handle body 12 is inserted into the mounting hole, and a second gap 15 communicated with the air cavity 9 is provided between the outer side of the handle body 12 and the inner side of the transmitting frame 4; the receiving frame 13 is sleeved on the handle body 12, and the rear end surface of the receiving frame 13 is provided with a second accommodating groove 1301 opposite to the first accommodating groove 401; the ultrasonic wireless receiving device 14 is arranged in the second accommodating groove 1301, and the ultrasonic wireless A third gap 16 communicated with the second gap 15 is provided between the receiving device 14 and the ultrasonic wireless transmitting device 5 . Preferably, the width of the second gap 15 is 0.2 mm to 5 mm.

Based on the above structure, the gas introduced into the first airway 103 is blown to the ultrasonic wireless receiving device 14 through the second airway 301 , the air cavity 9 , the first gap 11 , and the second gap 15 , and is then blown from the ultrasonic wireless transmitting device 5 to the ultrasonic wireless receiving device 14 . The third gap 16 between the ultrasonic wireless receiving devices 14 is blown out, which is used to blow away the dust impurities or liquid on the upper surface of the ultrasonic wireless receiving device 14, so as to keep the third gap 16 clean, and does not affect the ultrasonic

wireless transmitting device

5 and 5. The wireless power transmission between the ultrasonic wireless receiving devices 14; at the same time, the continuous air flow forms a positive pressure seal, which can prevent external dust impurities from entering the interior of the ultrasonic spindle 100 from the third gap 16; in addition, the gas can also affect the ultrasonic wave. The wireless receiving device 14 is cooled to improve its wireless transmission efficiency and prolong its service life.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims

An ultrasonic spindle, characterized in that, comprising:

main shaft housing;

a rotating shaft, which is rotatably penetrated in the main shaft housing, and a front end surface of the rotating shaft is provided with a mounting hole;

a front end cover, which is arranged at the front end of the main shaft housing and is arranged around the rotating shaft;

a launch rack, which is directly mounted on the front end surface of the front end cover and arranged around the rotating shaft, and the front end surface of the launch rack is provided with a first accommodating groove surrounding the rotating shaft;

an ultrasonic wireless transmitting device, which is arranged in the first accommodating groove, the ultrasonic wireless transmitting device comprises a transmitting coil arranged around the rotating shaft and a transmitting ferrite for accommodating the transmitting coil;

The volume of the first accommodating slot is V cubic millimeters, the inner diameter of the first accommodating slot is D 1 millimeters, the volume of the transmitting coil is V 1 cubic millimeters, and the number of turns of the transmitting coil is N, The cross-sectional area of the single-turn wire forming the transmitting coil is S square millimeters, the inner diameter of the transmitting frame is D 2 millimeters, and the volume of the transmitting ferrite is V 2 cubic millimeters, and the above parameter values satisfy the following functional relationship :

Wherein, V 2 =V 1 K 1 , 10≤N≤150, 0.02≤S≤2.6, 1≤K 1 ≤7, 1<K 2 ≤3, 0.5≤K 3 ≤1.5, K 1 , K 2 , K 3 is the correction factor.
Ultrasonic spindle according to claim 1, is characterized in that:

The emitting ferrite includes an annular bottom plate located at the bottom of the first accommodating groove and an annular inner side plate close to the inner side of the first accommodating groove, and the radial thickness of the annular inner plate is C mm, 0.5≤C≤5.
Ultrasonic spindle according to claim 1, is characterized in that:

30≤N≤120.
Ultrasonic spindle according to claim 1, is characterized in that:

The axial thickness of the launch frame is T mm, the axial depth of the first accommodating groove is H mm, and H/T=0.2-0.7.
Ultrasonic spindle according to claim 1, is characterized in that:

The radial thickness of the launch frame is M millimeters, the radial width of the first accommodating groove is L millimeters, and L/M=0.2-0.9.
Ultrasonic spindle according to claim 1, is characterized in that:

The transmitting frame has a hole through which a power cord connected to the transmitting coil passes.
ultrasonic spindle according to claim 6, is characterized in that:

The holes extend in the radial direction of the launch frame.
The ultrasonic spindle according to claim 1, further comprising:

a bearing, which is arranged between the outer side of the rotating shaft and the inner side of the main shaft housing;

an inner pressure ring, which is sleeved on the rotating shaft and compresses the inner ring of the bearing from front to back;

an outer pressure ring, which surrounds the outer circumference of the inner pressure ring and is pressed by the front end cover to the outer ring of the bearing from front to back.
ultrasonic spindle according to claim 8, is characterized in that:

The main shaft housing has a first air passage, an air cavity is provided between the inner side of the front end cover and the outer side of the inner pressure ring, and the front end cover has a connection connecting the first air passage and the air cavity. second airway.
ultrasonic spindle according to claim 9, is characterized in that:

The inner diameter of the first air passage is 1 mm to 6 mm, and the inner diameter of the second air passage is 1 mm to 6 mm.
ultrasonic spindle according to claim 9, is characterized in that:

The air cavity is provided with a ventilation ring surrounding the outer circumference of the inner pressure ring, a first gap is formed between the inner side of the ventilation ring and the outer side of the inner pressure ring, and the ventilation ring has a communication with the first gap. The second airway and the vent hole of the first gap.
ultrasonic spindle according to claim 11, is characterized in that:

The width of the first gap ranges from 0.1 mm to 1 mm.
ultrasonic spindle according to claim 11, is characterized in that:

The ventilation holes are provided in multiples and are evenly distributed along the circumferential direction of the ventilation ring.
ultrasonic spindle according to claim 11, is characterized in that:

A sealing groove surrounding the rotating shaft is provided on the rear end surface of the launch frame corresponding to the position of the ventilation ring, and a sealing ring abutting against the ventilation ring is arranged in the sealing groove.
ultrasonic spindle according to claim 11, is characterized in that:

The outer surface of the inner pressure ring is provided with annular bosses, and the annular bosses are provided in a plurality and distributed along the axial direction of the inner pressure ring.
A kind of ultrasonic processing equipment, is characterized in that, comprises:

The ultrasonic spindle according to any one of claims 1-15, the spindle housing has a first air passage, an air cavity is provided between the inner side of the front end cover and the outer side of the rotating shaft, and the front end cover has connecting the first airway and the second airway of the air cavity;

Ultrasonic tool handle, which includes a tool handle body, a receiving frame and an ultrasonic wireless receiving device, the rear end of the tool handle body is inserted in the installation hole, and the outer side of the tool handle body and the inner side of the transmitting frame There is a second gap communicating with the air cavity, the receiving frame is sleeved on the handle body, and the rear end surface of the receiving frame is provided with a second gap opposite to the first accommodating groove. Two accommodating grooves, the ultrasonic wireless receiving device is set in the second accommodating groove, and a third gap communicating with the second gap is set between the ultrasonic wireless receiving device and the ultrasonic wireless transmitting device .
ultrasonic processing equipment according to claim 16, is characterized in that:

The width of the second gap is 0.2 mm to 5 mm.