WO2022077531A1

WO2022077531A1 - Ultrasonic machining device and ultrasonic spindle thereof

Info

Publication number: WO2022077531A1
Application number: PCT/CN2020/121765
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: CN112317774A; CN112317774B

Abstract

The present invention relates to the technical field of ultrasonic machining, and provides an ultrasonic machining device and an ultrasonic spindle thereof. The ultrasonic machining device comprises: a spindle housing; a rotating shaft assembly rotatably provided in the spindle housing, a front end of the rotating shaft assembly protruding out of a front end face of the spindle housing, and a mounting hole being formed in a front end face of the rotating shaft assembly; a front end cover mounted at the front end of the spindle housing and annularly arranged on the periphery of the rotating shaft assembly, a rear end face of the front end cover being attached to the front end face of the spindle housing, and a first accommodating slot annularly formed in the rotating shaft assembly being formed in a front end face of the front end cover; and an ultrasonic wireless transmitting device provided in the first accommodating slot and comprising a transmitting coil and a transmitting ferrite. The present invention ensures that the device has good machining precision and machining efficiency, the device is suitable for machining working conditions in a larger range, and more materials can be machined.

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 gradually widely used. Ultrasonic spindles are one such application.

Existing ultrasonic spindles include stationary parts, rotating parts, bearings and ultrasonic transmission devices. Among them, the fixed components include related components such as the casing and the front end cover. Rotating parts include related parts such as rotating shafts. The ultrasonic transmission device may be an ultrasonic wireless transmission device or an ultrasonic wired transmission device.

At present, the ultrasonic wireless transmitting device is generally suspended by a hoop or installed outside the main shaft through a mounting frame, 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

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

The purpose of this application is achieved through the following technical solutions:

An ultrasonic spindle, comprising:

main shaft housing;

a rotating shaft assembly, which is rotatably arranged in the main shaft casing, the front end of the rotating shaft assembly protrudes from the front end surface of the main shaft casing, and the front end surface of the rotating shaft assembly is provided with a mounting hole;

a front end cover, which is installed on the front end of the spindle housing and is arranged around the outer periphery of the rotating shaft assembly, the rear end surface of the front end cover is fitted with the front end surface of the spindle housing, and the front end of the front end cover A first accommodating groove is provided on the surface of the rotating shaft assembly; and

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 assembly and a transmitting ferrite for accommodating the transmitting coil;

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

Wherein, 0.02≤S≤2.6, 10≤N≤150, V ₂ =V ₁ K ₁ , and 1≤K ₁ ≤7, 1<K ₂ ≤3, 0.5≤K ₃ ≤1.5, the K ₁ , K ₂ and _K3 are correction coefficients.

In some embodiments of the present application, the radial thickness of the front end cover is M mm, the radial width of the first accommodating groove is L mm, and L/M=0.2˜0.9.

In some embodiments of the present application, the axial thickness of the front end cover 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 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 plate is C mm, where 0.5≤C≤5.

In some embodiments of the present application, the value range of the number of turns N of the transmitting coil is 30≤N≤120.

In some embodiments of the present application, an end cover plate is further included, the end cover plate is mounted on the front end of the front end cover and is arranged around the outer periphery of the ultrasonic wireless transmitting device, and the rear end surface of the end cover plate is connected to the The front face of the front cover is fitted.

In some embodiments of the present application, the main shaft housing is provided with a first air passage running through its front and rear ends, and a first gap is left between the inner side surface of the front end cover and the outer side surface of the rotating shaft assembly, so A second air passage connecting the first air passage and the first gap is opened on the front end cover.

In some embodiments of the present application, the front end cover includes:

The end cover body is installed at the front end of the main shaft housing, the front end of the end cover body is provided with a mounting cavity that penetrates through the inner side of the end cover body, and the end cover body is also provided with a connection to the first an air passage and a through slot of the mounting cavity; and

a support frame, which is installed in the installation cavity, the first accommodating groove is opened on the support frame, and an intermediate groove is defined between the support frame and the end cover body, and the rear of the support frame A distribution groove communicating with the intermediate groove and the first gap is defined between the side and the end cover body, and the first accommodating groove is opened on the front end surface of the support frame;

Wherein, the through groove, the intermediate groove and the distribution hole jointly define and form the second air passage.

In some embodiments of the present application, the intermediate groove is in the shape of a ring arranged around the rotating shaft assembly.

In some embodiments of the present application, a plurality of the distribution grooves are included, and the plurality of the distribution grooves are distributed at intervals along the middle groove.

In some embodiments of the present application, a rear end surface of the support frame is provided with a slot running through its inner and outer sides, and the distribution slot is defined between the slot and the end cover body.

In some embodiments of the present application, the rotating shaft assembly includes a mandrel and a pressure ring sleeved on the outer side of the mandrel, and the first space between the outer side of the pressure ring and the inner side of the front end cover is left. a gap.

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

In some embodiments of the present application, a bearing is provided between the inner side of the main shaft housing and the outer side of the rotating shaft assembly, the rear end surface of the front end cover is provided with a convex ring arranged around the rotating shaft assembly, the The rear end of the convex ring is in contact with the outer ring of the bearing, and the rear end of the pressure ring is in contact with the inner ring of the bearing.

Based on the above-mentioned purpose of the invention, the present invention also provides a kind of ultrasonic processing equipment, including:

As with the above-mentioned ultrasonic spindle, the spindle housing is provided with a first air passage, a first gap is left between the inner side surface of the front end cover and the outer side surface of the rotating shaft assembly, and the front end cover is provided with a first air passage. a second air passage communicating with the first air passage and the first gap, and the air inlet of the second air passage is opened on the outer side of the front end cover;

An ultrasonic tool handle, which includes an ultrasonic wireless receiving device and a tool handle body, the rear end of the tool handle body is fitted into the installation hole, and the outer circumference of the tool handle body is opposite to the front side of the ultrasonic wireless transmitting device A mounting seat is provided, the rear end of the mounting seat is provided with a second receiving groove opposite to the first receiving groove and in the shape of an annular shape, the ultrasonic wireless receiving device is arranged in the second receiving groove, the A second gap is left between the ultrasonic wireless receiving device and the ultrasonic wireless transmitting device;

an end cover plate, which is installed on the front end of the front end cover and is arranged around the outer periphery of the ultrasonic wireless transmitting device;

Wherein, a third gap that opens forward is defined between the inner side surface of the end cover plate and the outer side surface of the mounting seat, and the second gap communicates with the first gap and the third gap.

In some embodiments of the present application, the radial width of the first accommodating groove is greater than the radial width of the second accommodating groove.

The present invention is based on the above-mentioned main shaft structure, and the technical effect it has is:

On the one hand, by setting the front end cover, and the front end cover is provided with a first accommodating groove, the ultrasonic wireless transmitting device can be installed in the first accommodating groove, so that the ultrasonic wireless transmitting device and the ultrasonic spindle can be reliably assembled through the reliable assembly of the front end cover and the main shaft housing. Integrated, it is not necessary to install the ultrasonic wireless transmitter separately through the external structure or mounting bracket, improve the assembly accuracy and assembly efficiency of the ultrasonic wireless transmitter and the rotating shaft assembly, and improve the stability of the ultrasonic wireless transmitter setup, and further, the ultrasonic wireless transmitter The electrical conduction between the device and the ultrasonic wireless receiving device is more stable and reliable, which can effectively improve the processing effect of the tool;

On the other hand, when 10≤N≤150, 0.02≤S≤2.6, the above parameter values satisfy the following functional relationship:

In this way, the number of turns of the transmitting coil of the ultrasonic wireless transmitting device, the cross-sectional area value of the single-turn wire, and the volume value of the transmitting ferrite are properly matched. Under the condition of the same power supply, the ultrasonic wireless transmitting device not only has a larger High power capacity, high effective output power, and high wireless transmission efficiency can improve the maximum amplitude of the tool during the working process, increase the adjustment range of the amplitude, expand the application range of the ultrasonic spindle, and increase the types of machinable materials. , and the calorific value is small, the performance is stable, and the service life is long.

In addition, the present invention also provides an ultrasonic processing equipment, which adopts the above-mentioned ultrasonic spindle, and therefore has good processing performance and application range.

Description of drawings

The present application will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be considered as part of the present application. scope limit. Furthermore, unless otherwise indicated, the drawings are only intended to represent the composition or construction of the described objects conceptually and may contain exaggerated representations and are not necessarily drawn to scale.

FIG. 1 is a perspective view of one embodiment of the ultrasonic processing apparatus of the present application.

FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1 .

FIG. 3 is a partial view of the embodiment shown in FIG. 2 .

Fig. 4 is the perspective sectional view of the front end cover in the embodiment shown in Fig. 1;

FIG. 5 is a cross-sectional view of the assembly of the front end cover and the ferrite in the embodiment shown in FIG. 1 .

FIG. 6 is a perspective view of the support frame in the embodiment shown in FIG. 1 .

FIG. 7 is a perspective view of the support frame of the embodiment shown in FIG. 1 from another perspective.

FIG. 8 is a cross-sectional view of the ferrite in the embodiment shown in FIG. 1 .

FIG. 9 is a perspective view of the pressure ring in the embodiment shown in FIG. 1 .

In the picture:

100. Ultrasonic spindle; 1. Spindle housing; 11. First air passage; 12. Housing body; 13. Bearing seat; 2. Rotating shaft assembly; 21. Mounting hole; 22. Mandrel; 23. Pressure ring; 231, annular boss; 3, front end cover; 31, first accommodating groove; 32, second air passage; 33, end cover body; 331, installation cavity; 332, through groove; 34, support frame; 341, slotted ; 35, convex ring; 4, ultrasonic wireless transmitting device; 41, transmitting coil; 42, transmitting ferrite; 421, annular bottom plate; 422, annular inner plate; 5, end cover plate; 6, first gap; 7. Middle groove; 8. Bearing; 9. Fourth clearance;

200, ultrasonic tool handle; 201, mounting seat; 2011, second accommodating groove; 202, ultrasonic wireless receiving device; 203, tool handle body;

300, the second gap;

400. The third gap.

Detailed ways

Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive, exemplary, and should not be construed as limiting the scope of protection of the present application.

First of all, it should be noted that the orientations such as top, bottom, upward, downward, etc. mentioned in this document are defined relative to the directions in the various drawings, they are relative concepts, and therefore can be defined according to their In different positions and different practical states. Therefore, these or other orientations should not be construed as limiting.

It should be noted that the term "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plural.

In addition, it should also be noted that, for any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the accompanying drawings, these technical features (or their equivalents) can still be Items) continue to be combined to obtain other embodiments of the present application not directly mentioned herein.

It should also be understood that the terms "first", "second", etc. are used herein to describe various pieces of information, but the pieces of information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information without departing from the scope of the present application.

It should be noted that the same reference numbers refer to the same or substantially the same components in the different drawings.

1 to 8, the present invention provides an ultrasonic processing equipment, including:

Ultrasonic spindle 100, which includes:

Spindle housing 1;

The rotating shaft assembly 2 is rotatably arranged in the main shaft housing 1, the front end of the rotating shaft assembly 2 protrudes from the front end surface of the main shaft casing 1, and the front end surface of the rotating shaft assembly 2 is provided with a mounting hole 21;

The front end cover 3 is mounted on the front end surface of the spindle housing 1 and is arranged around the outer circumference of the rotating shaft assembly 2 , the rear end surface of the front end cover 3 is fitted with the front end surface of the spindle housing 1 , and the front end surface of the front end cover 3 is provided with the first accommodating groove 31 surrounding the rotating shaft assembly 2; and

The ultrasonic wireless transmitting device 4 is arranged in the first accommodating groove 31, and the ultrasonic wireless transmitting device 4 includes a transmitting coil 41 arranged around the rotating shaft assembly 2 and a transmitting ferrite 42 for accommodating the transmitting coil 41;

The main shaft housing 1 is provided with a first air passage 11 running through its front and rear ends, a first gap 6 is left between the inner surface of the front end cover 3 and the outer surface of the rotating shaft assembly 2, and the front end cover 3 is provided with a communication the first airway 11 and the second airway 32 of the first gap 6;

The ultrasonic tool handle 200 includes an ultrasonic wireless receiving device 202 and a tool handle body 203. The rear end of the tool handle body 203 is fitted into the installation hole 21. There is a mounting seat 201. The rear end of the mounting seat 201 is provided with a second receiving groove 2011 opposite to the first receiving groove 31 and in the shape of a ring. The ultrasonic wireless receiving device 202 is arranged in the second receiving groove 2011. The ultrasonic wireless receiving device 202 A second gap 300 is left between the ultrasonic wireless transmitting device 4;

The end cover plate 5 is installed on the front end of the front end cover 3 and is arranged around the outer periphery of the ultrasonic wireless transmitting device 4;

Wherein, a third gap 400 that opens forward is defined between the inner surface of the end cover plate 5 and the outer surface of the mounting seat 201 , and the second gap 300 communicates with the first gap 6 and the third gap 400 .

In this way, on the one hand, by arranging the front end cover 3 and opening the first accommodating groove 31 in the front end cover 3, the ultrasonic wireless transmitting device 4 can be installed in the first accommodating groove 31, so that the front end cover 3 can be reliably assembled with the spindle housing 1. , the ultrasonic wireless transmitting device 4 is integrated with the ultrasonic spindle 100, and the installation of the ultrasonic wireless transmitting device 4 does not need to be carried out separately through the external structure or mounting bracket, thereby improving the assembly accuracy and assembly efficiency of the ultrasonic wireless transmitting device 4 and the rotating shaft assembly 2, and improving the The stability of the setting of the ultrasonic wireless transmitting device 4, and further, the electrical conduction between the ultrasonic wireless transmitting device 4 and the ultrasonic wireless receiving device 202 is more stable and reliable, which can effectively improve the processing effect of the tool; When the air inlet of the first air channel 11 enters the air into the first air channel 11 to form an air flow, the air flow flows into the external environment through the first gap 6, the second gap 300 and the third gap 400 to prevent impurities such as dust from entering the first air channel 11. A gap 6 is formed, and positive pressure seals are formed in the first gap 6 , the second gap 300 and the third gap 400 to reduce friction damage when the front end cover 3 and the rotating shaft assembly 2 rotate relative to each other, and flow through the first gap 6 . And the airflow in the third gap 400 takes out the heat generated by the operation of the rotating shaft assembly 2, the ultrasonic wireless transmitting device 4 and the ultrasonic wireless receiving device 202, and reduces and stabilizes the rotating shaft assembly 2, the ultrasonic wireless transmitting device 4 and the ultrasonic wireless receiving device 202. The working temperature of the third gap 400 is high, and the blowing direction of the air flow of the third gap 400 is forward, so as to further prevent dust from falling into and accumulating in the third gap 400 .

Since the front end cover 3 in this embodiment is connected to the spindle housing 1 by bolts, in order to decorate the front end surface of the front end cover 3 and prevent dust from entering the bolt connection holes, the rear end surface of the end cover plate 5 is connected to the front end of the front end cover 3 face fit.

Specifically, as shown in FIG. 3 , the front end cover 3 in this embodiment includes:

The end cover body 33 is installed on the front end of the main shaft housing 1 , the front end of the end cover body 33 is provided with a mounting cavity 331 which penetrates through the inner side of the end cover body 33 , and the end cover body 33 is also provided with the first air passage 11 . and the through slot 332 of the mounting cavity 331; and

The support frame 34 is installed in the installation cavity 331 , and an intermediate groove 7 is defined between the support frame 34 and the end cover body 33 , and a communication intermediate groove 7 and a first communication groove are defined between the rear side of the support frame 34 and the end cover body 33 . A distribution slot of the gap 6, the first accommodating slot 31 is opened on the front end surface of the support frame 34;

Wherein, the through groove 332 , the middle groove 7 and the distribution hole jointly define and form the second air passage 32 .

In this way, by arranging the support frame 34 and forming the first accommodating groove 31 on the support frame 34, it is convenient to set the ultrasonic wireless transmitting device 4, and at the same time, it is convenient to process the distribution groove on the support frame 34, so that the air flow from the second air After the channel 32 is blown into the middle groove 7, it enters the first gap 6 through the distribution groove and is blown out;

In addition, since the ultrasonic wireless transmitting device 4 is arranged in the first accommodating groove 31 formed on the support frame 34, and the distribution groove is set on the support frame 34 to communicate with the intermediate groove 7 and the first gap 6, the air flow can pass through the support frame 34. When the distribution slot of the rack 34 flows, it can take away a part of the heat generated by the ultrasonic wireless transmitting device 4 and transferred to the support frame 34, thereby realizing the heat dissipation of the ultrasonic wireless transmitting device 4, reducing the working environment temperature of the ultrasonic wireless transmitting device 4, and increasing the temperature of the ultrasonic wireless transmitting device 4. The working life of the ultrasonic wireless transmitter 4.

Further, the middle groove 7 in this embodiment is in the shape of a ring arranged around the rotating shaft assembly 2 , so that the airflow surrounds the outer surface of the rotating shaft assembly 2 and is blown out along the first gap 6 , so that the outer surface of the rotating shaft assembly 2 is blown out. Uniform heat dissipation is achieved under the action of airflow.

The ultrasonic spindle 100 includes a plurality of distribution grooves, and the plurality of distribution grooves are distributed at intervals along the middle groove 7 in the circumferential direction. The distribution grooves are matched with the middle grooves 7 arranged in a ring shape, so that the airflow entering the middle groove 7 can be directed to the middle groove 7 from multiple directions. Flow in the first gap 6 to improve the efficiency of airflow, so as to improve the heat dissipation efficiency of the rotating shaft assembly 2 and the support frame 34 .

Specifically, referring to FIG. 6 , the rear end surface of the support frame 34 is provided with a slot 341 running through its inner and outer sides, a distribution slot is defined between the slot 341 and the end cover body 33 , and the airflow in the middle slot 7 flows from the slot 341 It flows into the first gap 6 , and while passing through the slot 341 , the temperature of the support frame 34 is lowered, thereby reducing the working environment temperature of the ultrasonic wireless transmitting device 4 .

2 and 3, a bearing 8 is provided between the inner side of the main shaft housing 1 and the outer side of the rotating shaft assembly 2 in this embodiment to realize the relative rotation between the rotating shaft assembly 2 and the main shaft casing 1, and at the same time , a fourth gap 9 is formed between the inner surface of the main shaft housing 1 and the outer surface of the rotating shaft assembly 2, and the fourth gap 9 is communicated with the first gap 6, so that the airflow flows into the fourth gap 9 from the first gap 6, forming an ultrasonic wave The airflow blown from the rear end of the main shaft 100 prevents impurities such as dust from entering between the rotating shaft assembly 2 and the main shaft housing 1 .

Further, referring to FIG. 3 , FIG. 4 and FIG. 9 , the rear end surface of the front end cover 3 is provided with a convex ring 35 arranged around the rotating shaft assembly, and the rear end of the convex ring 35 abuts against the bearing 8 . The rear end is in contact with the outer ring of the bearing 8. The rotating shaft assembly 2 includes a mandrel 22 and a pressing ring 23 sleeved on the outside of the mandrel 22. The rear end of the pressing ring 23 abuts on the inner ring of the bearing 8 to improve the bearing 8 Stability of installation. In addition, a first gap 6 is left between the outer side surface of the pressing ring 23 and the inner side surface of the front end cover 3 , and the outer side surface of the pressing ring 23 has annular bosses 231 . The axial direction is equally spaced, which further prevents impurities such as dust from entering the interior of the ultrasonic spindle 100 through the first gap.

Among them, the main shaft housing 1 in this embodiment includes a housing body and a bearing seat 13 that penetrates through the housing body 12 for mounting the bearing 8 , the bearing seat 13 is formed with a mounting convex ring, and the front end of the housing body 12 The rear end surface of the front end cover 3 is installed in close contact with the front end surface of the mounting convex ring.

Referring to FIGS. 1 to 8 , the ultrasonic spindle 100 in an embodiment of the present invention, wherein the volume of the first accommodating slot 31 is V cubic millimeters, the number of turns of the transmitting coil 41 is N, and the single-turn wire forming the transmitting coil 41 The cross-sectional area is S square millimeters, the inner diameter of the first accommodating groove 31 is D ₁ mm, the inner diameter of the front end cover 3 is D ₂ mm, the volume of the transmitting coil is V ₁ cubic millimeter, and the volume of the transmitting ferrite 42 is V ₂ cubic millimeters, and 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 volume value V of the first accommodating groove 31 and the inner diameter value D of the front end cover 3 ₂ satisfies the following functional relationship:

When _{0.5≤K3≤1.5} , the number of turns of the transmitting coil 41 of the ultrasonic wireless transmitting device 4, the cross-sectional area value of the single-turn wire, the volume value of the transmitting ferrite 42, and the volume value between them and the first accommodating slot They are all matched properly. In this way, under the condition of the same power supply, the ultrasonic wireless transmitting device 4 not only has a larger power capacity, a higher effective output power, and a higher wireless transmission efficiency, but also can improve the working process of the tool. The maximum amplitude is increased, the adjustment range of the amplitude is increased, the application range of the ultrasonic spindle is expanded, the types of machinable materials are increased, and it does not generate heat, with stable performance and long service life.

Further preferably, in this embodiment, the value range of the number of turns N of the transmitting coil 41 is 30≤N≤120.

In the above functional relationship, K ₁ , K ₂ and K ₃ are all correction coefficients; the inner diameter value of the front end cover 3 is related to the specification of the ultrasonic spindle 100 , and the corresponding ultrasonic spindle 100 of different specifications has different inner diameter values of the front end cover 3 . It should be noted that the number of turns N of the transmitting coil 41 is the number of turns that guide the wire to rotate around the axis, and the wire can be either a single-core wire or a multi-core wire. For example, a wire consists of five core wires. 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-section can be calculated according to its equivalent circle. The area, that is, the diameter of the wire is D ₃ mm, that is, S=π(D ₃ /2) ² .

Specifically, 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, referring to the following table, wherein, Table 1 uses four sets of different front end caps 3. When the ultrasonic spindle 100 is connected with the ultrasonic tool, the test result when the ultrasonic tool is in a stable working state. Among them, the inner diameter value D2 of the front end cover ₃ and the volume value V of the first accommodating groove 31 satisfy the following functional relationship

Table 2 shows the test results when the ultrasonic tool is in a stable working state when the external wireless transmitting component is connected to the ultrasonic tool in the prior art. The difference between the embodiments of the present invention in Table 2 and Table 1 is that their ultrasonic wireless transmitting devices 4 are all It is installed by means of external mounting, rather than being integrated into the front end cover 3, and each parameter value does not meet the above functional relationship. Table 2 shows the test results when the tool is in a stable working state.

Table 1

Table 2

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

Further, referring to FIG. 5 , in this embodiment, in order to reasonably set the first accommodating groove 31 of the corresponding volume on the front end cover 3 to accommodate the ultrasonic wireless transmitting device 4, the radial thickness of the front end cover 3 is M If the thickness is T mm, the radial width of the first accommodating groove 31 is L mm, and the axial depth is H mm, there are L/M=0.2～0.9, H/T=0.2～0.7; in addition, the front end cover 3 is installed When installed in the spindle housing 1, it cooperates with the rotating shaft assembly 2 to realize the assembly of the tool holder.

Specifically, referring to FIGS. 3 and 5, the axial thickness of the front end cover 3 refers to the vertical distance between the end face of the front end cover 3 and the spindle housing 1 and the end face of the front end cover 3 and the end cover plate 5. The radial thickness of the front end cover 3 refers to the distance between the inner side and the outer side of the front end cover 3, and the radial width of the first accommodating groove 31 refers to the distance between the side of the first accommodating groove 31 close to the inner side of the front end cover 3 The distance between one side of the outer side of the front end cover 3.

It should be understood that the above parameters are for the case where the front end cover 3 is a cylindrical ring body or a conical ring body. Of course, the front end cover 3 can also be of other irregular shapes. A ring or conical ring is used to measure the above parameter values.

8 , the transmitting ferrite 42 includes an annular bottom plate 421 located at the bottom of the first accommodating groove 31 and an annular inner side plate 422 close to the inner side of the first accommodating groove 31 . The sense line is directed to the ultrasonic wireless receiving device 202 through the side surface of the annular inner plate 422 facing the ultrasonic wireless receiving device 202 . The radial thickness of the annular inner plate 422 is C mm. When 0.5≤C≤5, and the ultrasonic wireless transmitting device 4 in this embodiment is set to satisfy the above functional relationship, the transmitting ferrite cooperates with the transmitting coil in this radial thickness. The magnetic induction intensity that meets the production needs is generated in the effective area formed by the annular inner plate 422, so that the structure of the transmitting ferrite 42 is reasonably designed to ensure the transmission efficiency of the ultrasonic wireless transmitting device 4 and the wireless receiving device 202, reduce heat consumption, and improve Work stability.

In some embodiments of the present application, referring to FIG. 3 , the radial width of the first accommodating groove 31 is greater than the radial width of the second accommodating groove 2011 , so that the ultrasonic wireless transmitting device 4 disposed in the first accommodating groove 31 generates an effective The area can cover the wireless receiving device 202 arranged in the second accommodating slot 2011, so that the wireless receiving device 202 can fully exert its operating power.

In summary, the present invention helps to improve the assembly accuracy and stability of the ultrasonic spindle 100 by optimizing the structure of the ultrasonic spindle 100 , and at the same time, limits the volume value of the first accommodating groove 31 for accommodating the ultrasonic wireless transmitting device 4 and the front end cover 3 . When the ultrasonic wireless transmitting device 4 of the corresponding volume is accommodated in the first accommodating groove 31, the ultrasonic spindle 100 of the present invention is connected to the ultrasonic tool shank 200 to work stably, and it is helpful to improve the operation of the ultrasonic tool during the working process. The maximum amplitude of the ultrasonic tool, the wider the adjustable range of the ultrasonic tool, the more materials that can be processed.

This specification refers to the drawings to disclose the application and also to enable any person skilled in the art to practice the application, including making and using any devices or systems, employing suitable materials, and using any incorporated methods. The scope of the application is defined by the claimed technical solutions, and includes other examples that occur to those skilled in the art. Such other examples include structural elements that do not differ from the literal language of the claimed solution as long as such other examples include equivalent structural elements that do not differ substantially from the literal language of the claimed solution It should be considered to be within the protection scope determined by the technical solution claimed in this application.

Claims

An ultrasonic spindle, characterized in that, comprising:

main shaft housing;

a rotating shaft assembly, which is rotatably arranged in the main shaft casing, the front end of the rotating shaft assembly protrudes from the front end surface of the main shaft casing, and the front end surface of the rotating shaft assembly is provided with a mounting hole;

a front end cover, which is installed on the front end of the spindle housing and is arranged around the outer periphery of the rotating shaft assembly, the rear end surface of the front end cover is fitted with the front end surface of the spindle housing, and the front end of the front end cover A first accommodating groove is provided on the surface of the rotating shaft assembly; and

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 assembly and a transmitting ferrite for accommodating the transmitting coil;

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

Wherein, 0.02≤S≤2.6, 10≤N≤150, V 2 =V 1 K 1 , and 1≤K 1 ≤7, 1<K 2 ≤3, 0.5≤K 3 ≤1.5, the K 1 , K 2 and K3 are correction coefficients.
The ultrasonic spindle according to claim 1, wherein the radial thickness of the front end cover is M mm, the radial width of the first accommodating groove is L mm, and L/M=0.2-0.9.
The ultrasonic spindle according to claim 1, wherein the axial thickness of the front end cover is T mm, the axial depth of the first accommodating groove is H mm, and H/T=0.2-0.7.
The ultrasonic spindle according to claim 1, wherein the emitting ferrite comprises an annular bottom plate located at the bottom of the first accommodating groove and an annular inner side close to the inner side of the first accommodating groove Plate, the radial thickness of the annular inner plate is C mm, wherein, 0.5≤C≤5.
The ultrasonic spindle according to claim 1, wherein the value range of the number of turns N of the transmitting coil is 30≤N≤120.
The ultrasonic spindle according to claim 1, further comprising an end cover plate, the end cover plate is mounted on the front end of the front end cover and is arranged around the outer circumference of the ultrasonic wireless transmitting device, the end cover plate is The rear end surface of the plate is in contact with the front end surface of the front end cover.
The ultrasonic spindle according to claim 1, wherein the spindle housing is provided with a first air passage running through its front and rear ends, and the inner surface of the front end cover and the outer surface of the rotating shaft assembly are provided A first gap is left, and a second air channel connecting the first air channel and the first gap is opened on the front end cover.
The ultrasonic spindle according to claim 7, wherein the front end cover comprises:

The end cover body is installed at the front end of the main shaft housing, the front end of the end cover body is provided with a mounting cavity that penetrates through the inner side of the end cover body, and the end cover body is also provided with a connection to the first an air passage and a through slot of the mounting cavity; and

a support frame, which is installed in the installation cavity, the first accommodating groove is opened on the support frame, and an intermediate groove is defined between the support frame and the end cover body, and the rear of the support frame A distribution groove communicating with the intermediate groove and the first gap is defined between the side and the end cover body, and the first accommodating groove is opened on the front end surface of the support frame;

Wherein, the through groove, the intermediate groove and the distribution hole jointly define and form the second air passage.
The ultrasonic spindle according to claim 8, wherein the intermediate groove is in the shape of a ring arranged around the rotating shaft assembly.
The ultrasonic spindle according to claim 9, characterized in that it comprises a plurality of the distribution grooves, and a plurality of the distribution grooves are distributed at intervals along the middle groove in the circumferential direction.
The ultrasonic spindle according to claim 8, wherein the rear end surface of the support frame is provided with a slot running through its inner and outer sides, and the distribution slot is defined between the slot and the end cover body. .
The ultrasonic spindle according to claim 7, wherein the rotating shaft assembly comprises a mandrel and a pressure ring sleeved on the outside of the mandrel, the outer side of the pressure ring and the inner side of the front end cover The first gap is left therebetween.
The ultrasonic spindle according to claim 12, wherein the outer surface of the pressure ring has annular bosses, and the annular bosses are provided in multiples and distributed along the axial direction of the pressure ring.
The ultrasonic spindle according to claim 12 or 13, wherein a bearing is provided between the inner side of the spindle housing and the outer side of the rotating shaft assembly, and the rear end surface of the front end cover is provided with a bearing surrounding the rotating shaft A convex ring provided on the shaft assembly, the rear end of the convex ring abuts against the outer ring of the bearing, and the rear end of the pressure ring abuts against the inner ring of the bearing.
A kind of ultrasonic processing equipment, is characterized in that, comprises:

The ultrasonic spindle according to any one of claims 1-14, wherein a first air passage is opened on the spindle housing, and a first air passage is left between the inner side surface of the front end cover and the outer side surface of the rotating shaft assembly a gap, the front end cover is provided with a second air channel connecting the first air channel and the first gap, and the air inlet of the second air channel is opened on the outer side of the front end cover;

An ultrasonic tool handle, which includes an ultrasonic wireless receiving device and a tool handle body, the rear end of the tool handle body is fitted into the installation hole, and the outer periphery of the tool handle body is opposite to the front side of the ultrasonic wireless transmitting device A mounting seat is provided, the rear end of the mounting seat is provided with a second receiving groove opposite to the first receiving groove and in the shape of an annular shape, the ultrasonic wireless receiving device is arranged in the second receiving groove, the A second gap is left between the ultrasonic wireless receiving device and the ultrasonic wireless transmitting device;

an end cover plate, which is installed on the front end of the front end cover and is arranged around the outer periphery of the ultrasonic wireless transmitting device;

Wherein, a third gap that opens forward is defined between the inner side surface of the end cover plate and the outer side surface of the mounting seat, and the second gap communicates with the first gap and the third gap.
The ultrasonic spindle according to claim 15, wherein the radial width of the first accommodating groove is greater than the radial width of the second accommodating groove.