WO2022088465A1 - Ultrasonic main shaft, ultrasonic cutter holder and ultrasonic machining apparatus - Google Patents

Abstract

An ultrasonic main shaft (100), an ultrasonic cutter holder (200) and an ultrasonic machining apparatus. The ultrasonic main shaft comprises a main shaft housing (1), a rotating shaft assembly (2), a front end cover (3), a transmitting support (4) and an ultrasonic wireless transmitting device (5), wherein the rotating shaft assembly (2) is rotatably arranged in the main shaft housing (1) in a penetrating manner; the front end cover (3) is arranged at the front end of the main shaft housing (1) and is arranged surrounding the rotating shaft assembly (2); the transmitting support (4) is mounted on a front end face of the front end cover (3) and is arranged surrounding the rotating shaft assembly (2), and an inner side face of the transmitting support (4) is provided with a first accommodating slot (401) surrounding the rotating shaft assembly (2); and the ultrasonic wireless transmitting device (5) is arranged in the first accommodating slot (401), and the ultrasonic wireless transmitting device (5) comprises a transmitting coil (5a) arranged surrounding the rotating shaft assembly (2), and a transmitting ferrite (5b) for accommodating the transmitting coil (5a).

Description

Ultrasonic spindle, ultrasonic tool holder and ultrasonic processing equipment

This application claims the priority of the Chinese patent application with an application date of October 26, 2020 and an application number of 202011159653.6, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of ultrasonic processing, for example, to an ultrasonic spindle, an ultrasonic tool holder and ultrasonic processing equipment.

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.

The ultrasonic spindle in the related art includes a stationary part, a rotating part, a bearing assembly and an ultrasonic transmission device. Among them, the fixed components include spindle housing, front end cover and other related components. The rotating parts include related parts such as the rotating shaft assembly. The ultrasonic transmission device may be an ultrasonic wireless transmitting device or an ultrasonic wired transmission device. In the related art, 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 the ultrasonic wireless receiving device and the ultrasonic wireless receiving device, which affects the processing effect of the tool.

SUMMARY OF THE INVENTION

The application provides an ultrasonic spindle, an ultrasonic tool holder and an ultrasonic processing equipment, which can achieve the purposes of stable electrical conduction, good processing effect and excellent performance.

An embodiment provides an ultrasonic spindle, including: a spindle housing; a rotating shaft assembly rotatably penetrated through the spindle housing, the rotating shaft assembly includes a mandrel, and the front end surface of the mandrel is provided with an installation hole; a front end cover, which is arranged at the front end of the main shaft housing and surrounds the rotating shaft assembly; a launch frame is installed on the front end surface of the front end cover and is arranged around the rotating shaft assembly, and the The inner side is provided with a first accommodating groove surrounding the rotating shaft assembly; and an ultrasonic wireless transmitting device is arranged in the first accommodating groove, and the ultrasonic wireless transmitting device includes a transmitting coil arranged around the rotating shaft assembly and a A transmitting ferrite for accommodating the transmitting coil.

In one embodiment, the volume of the first accommodating slot is V cubic millimeters, the volume of the transmitting coil is V ₁ cubic millimeters, the volume of the transmitting ferrite is V ₂ cubic millimeters, and V ₂ =V ₁ K ₁ , 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 diameter of the inner side of the transmitting frame is D1 mm, the first accommodating slot is The diameter of the bottom surface of the groove is D ₂ mm, then the above parameter values satisfy the following functional relationship:

Among them, _10≤N≤150 , _{0.02≤S≤2.6} , _3≤K1≤9 , ₁ < _K2≤4 , _{0.5≤K3≤1.8} , K1, K2, K3 are correction coefficients.

In one embodiment, 30≤N≤120.

In one embodiment, the width of the first accommodating groove is L mm, the distance between the front end surface and the rear end surface of the launch frame is T mm, and L/T=0.2˜0.8.

In one embodiment, the depth of the first accommodating groove is H mm, the distance between the inner side surface and the outer side surface of the launch frame is M mm, and H/M=0.2˜0.8.

In one embodiment, 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 rotating shaft assembly, and the front end cover has a communication with the first air passage A second airway with the air cavity.

In one embodiment, the air cavity is provided with a ventilation ring arranged around the rotating shaft assembly, a ventilation gap is formed between the inner side of the ventilation ring and the outer side of the rotating shaft assembly, and the ventilation ring has a communication The second airway and the ventilation hole of the ventilation gap.

In one embodiment, the ventilation holes are provided in multiples and are evenly arranged along the circumferential direction of the ventilation ring.

In one embodiment, the inner side surface of the launch frame has an annular boss, and the rear end surface of the annular boss fits with the front end surface of the ventilation ring.

In one embodiment, a bearing is provided between the outer side of the mandrel and the inner side of the main shaft housing, and the rotating shaft assembly further includes an inner pressure ring sleeved on the mandrel, the inner pressure ring extending from The inner ring of the bearing is pressed forward and backward, the outer circumference of the inner pressure ring is surrounded by an outer pressure ring, and the front end cover presses the outer pressure ring against the outer ring of the bearing from front to rear.

In one embodiment, the outer surface of the inner pressure ring has annular ribs, and the annular ribs are provided in multiples and arranged along the axial direction of the inner pressure ring.

In one embodiment, the emitting ferrite includes a first bottom wall and first side walls disposed on both sides of the first bottom wall, the first bottom wall and the groove bottom surface of the first accommodating groove The positions of the first side walls correspond to the positions of the side surfaces of the first accommodating grooves, and the transmitting coils are arranged in the first grooves enclosed by the first bottom wall and the first side walls.

In one embodiment, the thickness of the first side wall is 0.5 mm to 5 mm.

In one embodiment, the emitting ferrite includes a first ferrite front ring and a first ferrite rear ring arranged back and forth along its own axis, the first ferrite front ring and the first ferrite rear ring Ring splices make up the emissive ferrite.

In one embodiment, the emitting ferrite includes a plurality of ferrite arc segments arranged along its circumferential direction, and the multiple ferrite arc segments are assembled to form the emitting ferrite.

In one embodiment, the launcher includes a launcher body and a front cover, the rear end surface of the launcher body is in contact with the front end of the front cover, and the front cover is arranged on the front cover of the launcher body. The front end and the launcher body together form the first accommodating groove.

An embodiment also provides an ultrasonic tool handle, including: a tool handle body; and an ultrasonic wireless receiving device, which is sleeved on the tool handle body and used to cooperate with the above-mentioned ultrasonic wireless transmitting device to realize ultrasonic wireless power transmission.

In one embodiment, the outer side of the handle body has a support part provided at the front end of the ultrasonic wireless receiving device, and the rear end of the ultrasonic wireless receiving device is provided with a fixing ring sleeved on the handle body, A second accommodating groove opposite to the first accommodating groove is formed between the support portion and the fixing ring, and the ultrasonic wireless receiving device is arranged in the second accommodating groove.

In one embodiment, the ultrasonic wireless receiving device includes a receiving coil disposed around the handle body and a receiving ferrite for accommodating the receiving coil, the receiving ferrite including a second bottom wall and a device On the second side walls on both sides of the second bottom wall, the second bottom wall corresponds to the position of the bottom surface of the second accommodating groove, and the second side wall corresponds to the groove of the second accommodating groove. The positions of the side surfaces correspond to each other, and the receiving coil is arranged in a second groove surrounded by the second bottom wall and the second side wall.

In one embodiment, the receiving ferrite includes a second ferrite front ring and a second ferrite rear ring arranged in front and rear along its axial direction, the second ferrite front ring and the second ferrite rear ring Ring splices make up the receiver ferrite.

The application also provides an ultrasonic processing equipment, comprising: the above-mentioned ultrasonic spindle; and the above-mentioned ultrasonic tool holder; wherein the rear end of the tool holder body is inserted into the installation hole, and the A first gap is formed between the outside and the inside of the transmitting frame, and a second gap that communicates with the first gap is formed between the outside of the ultrasonic wireless receiving device and the inside of the ultrasonic wireless transmitting device.

In one embodiment, an air cavity communicated with the first gap is provided between the inner side of the front end cover and the outer side of the rotating shaft assembly, the spindle housing has a first air passage, and the front end cover There is a second air passage communicating with the first air passage and the air cavity.

In one embodiment, the inner surface of the transmitting frame has an annular boss, the rear end of the ultrasonic wireless receiving device is provided with a fixing ring sleeved on the handle body, and the front end surface of the annular boss is connected to the A third gap connecting the first gap and the second gap is formed between the rear end surfaces of the fixing ring.

In one embodiment, the width of the second gap is 0.1 mm to 2.5 mm.

An embodiment also provides an ultrasonic spindle. On the one hand, the ultrasonic wireless transmitting device can be integrated on the ultrasonic spindle by providing a transmitting frame directly installed on the front end surface of the front end cover, and there is no need to suspend the ultrasonic spindle through a hoop or the like. The bracket is suspended and installed, so that the installation accuracy of the ultrasonic wireless transmitting device is higher and the stability is better. 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 of the tool. In addition, the launcher can also play a dust-proof and waterproof sealing effect. At the same time, the launcher can serve as a decorative cover for the ultrasonic spindle, and can improve the aesthetics by covering the front end cover; and because the launcher is installed in the The front end face of the front end cover has a compact structure, so compared with the suspension bracket, the launch frame is less likely 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 volume of the transmitting coil is V ₁ cubic millimeters, the volume of the transmitting ferrite is V ₂ cubic millimeters, and V ₂ =V ₁ K ₁ , the turns of the transmitting coil are V 2 cubic millimeters The number is N, the cross-sectional area of the single-turn wire that forms the transmitting coil is S square millimeters, the diameter of the inner side of the transmitting frame is D ₁ mm, and the diameter of the bottom surface of the first receiving slot is D ₂ mm. When the above parameter values Satisfy the following functional relationship:

Among them, when 10≤N≤150, 0.02≤S≤2.6, 3≤K ₁ ≤9, 1<K ₂ ≤4, 0.5≤K ₃ ≤1.8, under the same conditions, the ultrasonic wireless transmitting device and the ultrasonic wireless receiving device Compared with the upper and lower setting, the inner and outer setting can further increase the maximum amplitude of the tool during the working process, increase the amplitude adjustment range of the tool, thereby expanding the scope of application of the tool and increasing the types of machinable materials.

The present invention also provides an ultrasonic tool holder, because it has an ultrasonic wireless receiving device for realizing ultrasonic wireless energy transmission in cooperation with the above-mentioned ultrasonic wireless transmitting device, so when it is used in conjunction with the above-mentioned ultrasonic spindle, the electrical conduction is stable, The processing effect is good.

An embodiment also provides an ultrasonic processing device. Since the ultrasonic processing device adopts the above-mentioned ultrasonic spindle and the above-mentioned ultrasonic tool holder, it also has the characteristics of stable electrical conduction, good processing effect and excellent performance.

Description of drawings

1 is a schematic diagram of the overall structure of an ultrasonic processing device provided by an embodiment;

FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of an ultrasonic processing apparatus according to an embodiment;

Fig. 3 is an enlarged view of I region in Fig. 2;

4 is a schematic diagram of a longitudinal cross-sectional structure of a launcher according to an embodiment;

FIG. 5 is a schematic diagram of a split structure of a launch stand according to an embodiment;

6 is a schematic diagram of the overall structure of an ultrasonic tool handle according to an embodiment;

7 is a schematic diagram of the overall structure of a ventilation ring according to an embodiment;

8 is a schematic diagram of the overall structure of an inner pressure ring according to an embodiment;

FIG. 9 is a schematic diagram of the overall structure of the emitting ferrite according to an embodiment;

10 is a schematic diagram of a split structure of the emitting ferrite according to an embodiment;

11 is a schematic diagram of another split structure of the emitting ferrite according to an embodiment;

12 is a schematic diagram of the overall structure of a receiving ferrite according to an embodiment;

13 is a schematic diagram of a split structure of a receiving ferrite according to an embodiment;

FIG. 14 is a schematic diagram of structural parameters of a launch stand according to an embodiment.

In the figure: 100, ultrasonic spindle; 200, ultrasonic tool holder; 1, spindle housing; 1a, housing body; 1b, front bearing seat; 101, first air passage; 2, rotating shaft assembly; 2a, mandrel; 2b, inner pressure ring; 2b01, annular rib; 3, front end cover; 301, second air passage; 4, launcher; 4a, launcher body; 4b, front cover; 401, first accommodating groove; 402, 403, annular boss; 5, ultrasonic wireless transmitting device; 5a, transmitting coil; 5b, transmitting ferrite; 5b01, first bottom wall; 5b02, first side wall; 5b1, first ferrite front ring ; 5b2, the first ferrite back ring; 5b3, the ferrite arc segment; 6, the handle body; 601, the support part; 7, the ultrasonic wireless receiving device; 7a, the receiving coil; 7b, the receiving ferrite; 7b01, the second bottom wall; 7b02, the second side wall; 7b1, the second ferrite front ring; 7b2, the second ferrite rear ring; 8, the first gap; 9, the second gap; 10, the bearing; 11. External pressure ring; 12. Fixing ring; 13. Second accommodating groove; 14. Air cavity; 15. Ventilation ring; 1501. Ventilation hole;

Detailed ways

In this embodiment, the terms "first" and "second" are only used for descriptive purposes to distinguish the same type of technical features, and should not be interpreted as indicating or implying the relative importance, order and quantity of these technical features, nor 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, and is defined as "first" and "second" The technical features of a . may expressly or implicitly include one or more of the technical features. Also, unless stated otherwise, "plurality" means 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.

It should be noted that, in the description of this application, the meaning of the term "upper" includes "inner", "outer", "upper", "lower", etc. The terms "front" and "rear" refer to the ultrasonic machining For the device and its ultrasonic spindle 100 and ultrasonic tool holder 200 , those close to the workpiece to be processed are regarded as "front", and those far away from the workpiece are regarded as "rear".

Referring to FIG. 1 , FIG. 1 provides an ultrasonic processing apparatus according to an embodiment, and the ultrasonic processing apparatus includes an ultrasonic spindle 100 and an ultrasonic tool holder 200 .

In one embodiment, as shown in FIG. 1 to FIG. 3 , the ultrasonic spindle 100 includes a spindle housing 1, a rotating shaft assembly 2, a front end cover 3, a transmitting frame 4 and an ultrasonic wireless transmitting device 5; the rotating shaft assembly 2 is rotatable. Passing through the main shaft housing 1, the rotating shaft assembly 2 includes a mandrel 2a, and the front end surface of the mandrel 2a is provided with a mounting hole; the front end cover 3 is arranged on the front end of the main shaft casing 1 and is arranged around the rotating shaft assembly 2; 4 is installed on the front end surface of the front end cover 3 and is arranged around the rotating shaft assembly 2. In one embodiment, the launch frame 4 and the front end cover 3 are fixedly installed in a direct contact connection mode, or are fixedly installed in a fit manner; The inner side of the frame 4 is provided with a first accommodating groove 401 surrounding the rotating shaft assembly 2 , and the ultrasonic wireless transmitting device 5 is provided in the first accommodating groove 401 .

In one embodiment, the ultrasonic tool handle 200 includes a tool handle body 6 and an ultrasonic wireless receiving device 7 sleeved on the tool handle body 6; the rear end of the tool handle body 6 is inserted into the installation hole of the mandrel 2a, and the A first gap 8 is formed between the outside of the handle body 6 and the inside of the transmitting frame 4 , and a second gap 9 that communicates with the first gap 8 is formed between the outside of the ultrasonic wireless receiving device 7 and the inside of the ultrasonic wireless transmitting device 5 .

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 spindle 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. Furthermore, the electrical conduction between the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 is more stable and reliable, which can effectively improve the processing effect of the tool; 4 can also play a dustproof and waterproof sealing effect. At the same time, the launch frame 4 can serve as a decorative cover for the ultrasonic spindle 100, and the purpose of improving the aesthetics is achieved by covering the front end cover 3; and because the launch frame 4 is installed at the front end The front end surface of the cover 3 has a compact structure, so compared with the suspension bracket, the transmitting frame 4 is less likely to interfere with other structures other than the ultrasonic spindle 100 .

In one embodiment, the width of the second gap 9 is 0.1 mm to 2.5 mm, to ensure that the electrical conduction between the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 is stable, and the two are not prone to collision; in other implementations In an example, the width of the second gap 9 is 0.4 mm-0.8 mm.

2 and 3 , the ultrasonic spindle 100 further includes a bearing 10 , which is provided between the outer side of the mandrel 2 a and the inner side of the spindle housing 1 , so that the rotating shaft assembly 2 can rotate relative to the spindle housing 1 . The rotary shaft assembly 2 also includes an inner pressure ring 2b sleeved on the mandrel 2a, and the inner pressure ring 2b compresses the inner ring of the bearing 10 from front to back; Press the outer pressure ring 11 to the outer ring of the bearing 10 forward and backward. In this way, the bearing 10 can be reliably installed and easy to disassemble.

Optionally, as shown in FIG. 2, in this embodiment, the main shaft housing 1 includes a housing body 1a and a front bearing seat 1b mounted on the front end of the housing body 1a, and the bearing 10 is mounted on the inner side of the front bearing seat 1b and Between the outer sides of the mandrel 2a; the rear end surface of the front end cover 3 is in contact with the front end surface of the front bearing seat 1b.

Optionally, as shown in FIGS. 2 to 5 , in this embodiment, the launcher 4 includes a launcher body 4a and a front cover 4b, and the rear end surface of the launcher body 4a is in contact with the front end of the front end cover 3 , In order to improve the sealing performance of the ultrasonic spindle 100 , the front cover plate 4b is arranged at the front end of the launcher body 4a and together with the launcher body 4a forms a first accommodating groove 401 . In this way, only by removing the front cover 4b, the disassembly, assembly and maintenance of the ultrasonic wireless transmitting device 5 can be realized, and the operation is simple and convenient. In addition, the transmitting frame body 4a has a hole 402 that communicates with the first accommodating groove 401, so that the power cord connected to the ultrasonic wireless transmitting device 5 can pass through.

Optionally, as shown in FIG. 6 , in this embodiment, the outer side of the tool handle body 6 has a support portion 601 disposed at the front end of the ultrasonic wireless receiving device 7 , and the rear end of the ultrasonic wireless receiving device 7 is provided with a support portion 601 that is sleeved on the knife. The fixing ring 12 on the handle body 6 forms a second accommodating groove 13 opposite to the first accommodating groove 401 between the fixing ring 12 and the support portion 601 , and the ultrasonic wireless receiving device 7 is arranged in the second accommodating groove 13 . In this way, only by removing the fixing ring 12, the ultrasonic wireless receiving device 7 can be disassembled and assembled, and the operation is simple and convenient.

Optionally, as shown in FIGS. 2 and 3 , in this embodiment, an air cavity 14 communicating with the first gap 8 is provided between the inner side of the front end cover 3 and the outer side of the rotating shaft assembly 2 ; 1 has a first air passage 101, the first end of the first air passage 101 extends to the rear end face of the housing body 1a, and the second end of the first air passage 101 extends to the front end face of the front bearing seat 1b; the front end cover 3 has The second air passage 301 communicates with the first air passage 101 and the air cavity 14 .

Based on the above structure, the gas introduced into the first air channel 101 is blown to the ultrasonic wireless receiving device 7 through the second air channel 301, the air cavity 14 and the first gap 8, and then blown out through the second gap 9. During this process, The flowing gas can blow away the dust, impurities or liquid in the second gap 9 to keep the second gap 9 clean, and does not affect the wireless power transmission between the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7; and this At the same time, the continuous airflow forms a positive pressure seal, which can prevent external dust and impurities from entering the interior of the ultrasonic spindle 100 from the second gap 9, thereby improving the stability and reliability of the ultrasonic spindle 100; The temperature of the rotating shaft assembly 2, the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 can improve the working condition of the rotating shaft assembly 2, improve the wireless transmission efficiency of the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7, and prolong the operation time of the ultrasonic spindle 100. service life.

In one embodiment, the inner diameter of the first air passage 101 and the inner diameter of the second air passage 301 are equal to 1 mm to 6 mm, so as to ensure the size of the airflow and improve the effectiveness of cleaning and positive pressure sealing.

Optionally, as shown in FIG. 2 , FIG. 3 and FIG. 7 , in this embodiment, in order to make the air entering the air cavity 14 evenly blow to the rotating shaft assembly 2 , the air cavity 14 is provided with a surrounding rotating shaft assembly. The ventilation ring 15 provided in 2, a ventilation gap 16 is formed between the inner side of the ventilation ring 15 and the outer side of the rotating shaft assembly 2, and the ventilation ring 15 has a ventilation hole 1501 connecting the second airway 301 and the ventilation gap 16, and the ventilation hole 1501 is provided. It is a plurality of and evenly arranged along the circumferential direction of the ventilation ring 15 .

In one embodiment, the width of the ventilation gap 16 is 0.2 mm to 5 mm; in other embodiments, the width of the ventilation gap 16 is 1 mm to 3 mm.

Optionally, as shown in FIG. 2 , FIG. 3 and FIG. 7 , in this embodiment, the inner side surface of the launcher body 4 a has an annular boss 403 , and the front end surface of the annular boss 403 and the rear end surface of the fixing ring 12 are located between A third gap 17 is formed between the first gap 8 and the second gap 9, and the rear end surface of the annular boss 403 is in contact with the front end surface of the ventilation ring 15 to prevent the flow through the ventilation gap 16 and the first gap 8. Air leaks from between the launch frame 4 and the vent ring 15, which affects the effect of the positive pressure seal.

In one embodiment, the inner side of the launcher body 4a is the inner side of the launcher 4, that is, the reference plane where the first accommodating groove 401 and the annular boss 403 are located, not the groove bottom surface of the first accommodating groove 401 or the bottom surface of the first accommodating groove 401. The convex surface of the annular boss 403 .

Optionally, as shown in FIG. 2 , FIG. 3 and FIG. 8 , in this embodiment, the ventilation gap 16 is set between the inner side of the ventilation ring 15 and the outer side of the inner pressure ring 2b, in order to prevent dust, chip particles, water vapor, etc. Impurities such as these enter the ultrasonic spindle 100 through the ventilation gap 16 . The outer surface of the inner pressure ring 2b has annular ribs 2b01 . In this way, the annular rib 2b01 can block impurities outside the ultrasonic spindle 100 or in the ventilation gap 16 .

Optionally, as shown in FIG. 9, in this embodiment, the ultrasonic wireless transmitting device 5 includes a transmitting coil 5a arranged around the rotating shaft assembly 2 and a transmitting ferrite 5b arranged to accommodate the transmitting coil 5a; The cross section of the body 5b is approximately "C" shaped, and the emitting ferrite 5b includes a first bottom wall 5b01 and first side walls 5b02 arranged on both sides of the first bottom wall 5b01; the first bottom wall 5b01 and the first accommodating groove The position of the bottom surface of the slot 401 corresponds to that of the first side wall 5b02 , and the position of the side surface of the first receiving slot 401 corresponds to that of the slot;

In one embodiment, the thickness of the first side wall 5b02 is 0.5 mm to 5 mm, so as to ensure that the ultrasonic wireless transmitting device 5 can generate a sufficiently strong magnetic field strength to improve the wireless transmission efficiency and effective output power; in other embodiments, The thickness of the first side wall 5b02 is 1 mm to 3 mm.

In one embodiment, as shown in FIG. 9 and FIG. 10 , in order to enable the transmitting coil 5a to be smoothly installed in the first groove, the transmitting ferrite 5b adopts a split structure, including The first ferrite front ring 5b1 and the first ferrite back ring 5b2, the first ferrite front ring 5b1 and the first ferrite back ring 5b2 are spliced to form the emitting ferrite 5b and together form the first groove . Specifically, the cross sections of the first ferrite front ring 5b1 and the first ferrite rear ring 5b2 are both approximately "L" shaped, wherein the first ferrite front ring 5b1 is surrounded by a part of the first bottom wall 5b01 The first ferrite back ring 5b2 consists of another part of the ring segment of the first bottom wall 5b01 and the first side located on the side of the first bottom wall 5b01 The wall 5b02 is formed, so that the two parts of the first bottom wall 5b01 are abutted to obtain a complete emitting ferrite 5b.

In an embodiment, as shown in FIG. 11 , the emitting ferrite 5b may also adopt other forms of split structures, for example, the emitting ferrite 5b includes a plurality of ferrite arc segments 5b3, The arc segments 5b3 are arranged along the circumferential direction of the emitting ferrite 5b, the cross section of each ferrite arc segment 5b3 is approximately "C"-shaped, and a plurality of ferrite arc segments 5b3 are spliced to form the emitting ferrite 5b. In other embodiments, the emitting ferrite 5b is formed by splicing two semicircular ferrite arc segments 5b3.

Optionally, as shown in FIG. 12, in this embodiment, the ultrasonic wireless receiving device 7 includes a receiving coil 7a arranged around the handle body 6 and a receiving ferrite 7b arranged to accommodate the receiving coil 7a; the receiving ferrite The cross section of the body 7b is also approximately "C"-shaped, including the second bottom wall 7b01 and the second side walls 7b02 arranged on both sides of the second bottom wall 7b01, the second bottom wall 7b01 and the groove bottom surface of the second accommodating groove 13 The positions correspond to the positions of the second side wall 7b02 and the side surface of the second accommodating slot 13, and the receiving coil 7a is disposed in the second groove surrounded by the second bottom wall 7b01 and the second side wall 7b02.

In other embodiments, as shown in FIGS. 12 and 13 , in order to enable the receiving coil 7a to be smoothly installed in the second groove, the receiving ferrite 7b also adopts a split structure, including front and rear along its own axis. The second ferrite front ring 7b1 and the second ferrite back ring 7b2, the second ferrite front ring 7b1 and the second ferrite back ring 7b2 are spliced to form the receiving ferrite 7b and together form a second groove groove. Specifically, the cross sections of the second ferrite front ring 7b1 and the second ferrite rear ring 7b2 are both approximately "L" shaped, wherein the second ferrite front ring 7b1 is surrounded by a part of the second bottom wall 7b01 The second ferrite back ring 7b2 is composed of another part of the ring segment of the second bottom wall 7b01 and the second side wall 7b02 located on the side of the second bottom wall 7b01. Two side walls 7b02 are formed. In this way, the two parts of the second bottom wall 7b01 are abutted to obtain a complete receiving ferrite 7b.

Referring to FIG. 14 , as a specific implementation of the ultrasonic spindle 100 provided in the embodiment of the present application, the volume of the first accommodating slot 401 is V cubic millimeters, the volume of the transmitting coil 5a is V ₁ cubic millimeters, and the volume of the transmitting ferrite 5b is V 1 cubic millimeters. The volume is V ₂ cubic millimeters, and V ₂ =V ₁ K ₁ , the number of turns of the transmitting coil 5a is N, the cross-sectional area of the single-turn wire forming the transmitting coil 5a is S square millimeters, and the diameter of the inner side of the transmitting frame 4 is D ₁ mm, the diameter of the groove bottom surface of the first accommodating groove 401 is D ₂ mm, then the above parameter values satisfy the following functional relationship:

Among them, 10≤N≤150, 0.02≤S≤2.6.

On this basis, if the volume value V of the first accommodating groove 401 and the diameter value D ₁ of the inner side surface of the launch frame 4 also satisfy the following functional relationship:

Under the same conditions, compared with the upper and lower settings of the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7, the maximum amplitude of the tool during the working process can be further increased, the amplitude adjustment range of the tool can be increased, and the tool can be further expanded. The scope of application increases the types of machinable materials. In one embodiment, 30≤N≤120.

In the above functional relationship, K ₁ , K ₂ , and K ₃ are all correction coefficients. The diameter of the inner side of the launcher 4 is related to the specification of the ultrasonic tool holder 200, that is, the specification of the ultrasonic spindle 100. The diameter of the inner side of the matched launcher 4 for the ultrasonic toolholder 200 and the ultrasonic spindle 100 of different specifications different. The number of turns of the transmitting coil 5a refers to the number of turns of the wire around the rotating shaft, 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. 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, the wire The diameter of the wire is D ₃ mm, then there is S=π(D ₃ /2) ² .

In order to verify that when the above parameter values satisfy the above functional relationship, the internal and external settings of the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 can increase the maximum amplitude of the tool during the working process compared with the upper and lower settings. One group of test objects are the ultrasonic spindles 100 of four different specifications provided by the embodiment of the application, and Table 1 is the working state test results of their tools; the second group of test objects is the ultrasonic wave with the same specifications as the first group of test objects in the related art The main shaft 100 differs from the first group of test objects in that the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 are arranged up and down. Table 2 shows the test results of the working state of the tool.

Table 1 (the tool working state test performance table of the four different specifications of the ultrasonic spindle of the present invention)

Table 2 (Tool working state test performance table of four different specifications of ultrasonic spindles in the prior art)

As can be seen from Table 1 and Table 2, under the same test conditions, the ultrasonic spindle 100 provided by the embodiment of the present application is compared with the ultrasonic spindle 100 of the ultrasonic wireless transmitting device 5 and the ultrasonic wireless receiving device 7 arranged up and down in the related art. , the maximum amplitude of the tool is significantly larger, which indicates that the ultrasonic spindle 100 provided in the embodiment of the present application has better performance, wider application range, and more types of machinable materials.

It should be noted that, in the present application, the amplitude values in Tables 1 and 2 are peak-to-peak values, that is, the difference between the positive peak value and the negative peak value of the amplitude in one cycle.

Optionally, as shown in FIG. 14 , in this embodiment, the width of the first accommodating groove 401 is L mm, the depth is H mm, the distance between the front end surface and the rear end surface of the launch frame 4 is T mm, and the inner surface is T mm. The distance between the side and the outer side is M 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, L/T=0.2-0.8, and H/M=0.2-0.8, at this time, the volume of the launcher 4 Appropriate, it will not affect the performance of the ultrasonic spindle 100, and the aesthetics are good.

It should be emphasized that the above parameters are for the case where the launcher 4 is a cylindrical ring body or a conical ring body. If the launcher rack 4 is in other irregular shapes, the launcher 4 can be approximated as a cylindrical ring body or a cone at this time. The annular body is used to measure the above-mentioned parameter values.

Claims (24)

1. An ultrasonic spindle, comprising:

   main shaft housing;

   a rotating shaft assembly, which is rotatably passed through the main shaft housing, the rotating shaft assembly includes a mandrel, and the front end surface of the mandrel is provided with a mounting hole;

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

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

   An ultrasonic wireless transmitting device is arranged in the first accommodating groove, and the ultrasonic wireless transmitting device includes a transmitting coil arranged around the rotating shaft assembly and a transmitting ferrite for accommodating the transmitting coil.
2. The ultrasonic spindle according to claim 1, wherein the volume of the first accommodating groove is V cubic millimeters, the volume of the transmitting coil is V ₁ cubic millimeters, and the volume of the transmitting ferrite is V ₂ cubic millimeters , and V ₂ =V ₁ K ₁ , 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, and the diameter of the plane where the first accommodating slot is located is D ₁ mm, the diameter of the groove bottom surface of the first accommodating groove is D ₂ mm, then the above-mentioned parameter values satisfy the following functional relationship:

   

   Among them, _10≤N≤150 , _{0.02≤S≤2.6} , _3≤K1≤9 , ₁ < _K2≤4 , _{0.5≤K3≤1.8} , K1, K2, K3 are correction coefficients.
3. The ultrasonic spindle according to claim 2, wherein 30≤N≤120.
4. The ultrasonic spindle according to claim 1, wherein the width of the first accommodating groove is L mm, the distance between the front end surface and the rear end surface of the transmitting frame is T mm, and L/T=0.2-0.8.
5. The ultrasonic spindle according to claim 1, wherein the depth of the first accommodating groove is H mm, the distance between the inner side surface and the outer side surface of the transmitting frame is M mm, and H/M=0.2-0.8.
6. The ultrasonic spindle according to claim 1, wherein 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 assembly, and the front end cover has The first air passage communicates with the second air passage of the air cavity.
7. The ultrasonic spindle according to claim 6, wherein a ventilation ring arranged around the rotating shaft assembly is arranged in the air cavity, and a ventilation gap is formed between the inner side of the ventilation ring and the outer side of the rotating shaft assembly , the ventilation ring has a ventilation hole communicating with the second airway and the ventilation gap.
8. The ultrasonic spindle according to claim 7, wherein the ventilation holes are provided in a plurality and uniformly arranged along the circumferential direction of the ventilation ring.
9. The ultrasonic spindle according to claim 7, wherein the inner side surface of the launch frame has an annular boss, and the rear end surface of the annular boss fits with the front end surface of the ventilation ring.
10. The ultrasonic spindle according to claim 1, wherein a bearing is provided between the outer side of the mandrel and the inner side of the spindle housing, and the rotating shaft assembly further comprises an inner pressure ring sleeved on the mandrel , the inner pressure ring presses the inner ring of the bearing from front to back, the outer circumference of the inner pressure ring is surrounded by an outer pressure ring, and the front end cover presses the outer pressure ring against the bearing from front to back the outer ring.
11. The ultrasonic spindle according to claim 10, wherein the outer surface of the inner pressure ring has an annular rib, and the annular rib is provided in a plurality and arranged along the axial direction of the inner pressure ring.
12. The ultrasonic spindle according to claim 1, wherein the emitting ferrite comprises a first bottom wall and first side walls disposed on both sides of the first bottom wall, the first bottom wall and the The position of the bottom surface of the first accommodating groove corresponds to the position of the bottom surface of the groove, the position of the first side wall corresponds to the position of the side surface of the groove of the first accommodating groove, and the transmitting coil is arranged on the first bottom wall and the first side wall. in the first groove.
13. The ultrasonic spindle according to claim 12, wherein the thickness of the first side wall is 0.5 mm to 5 mm.
14. The ultrasonic spindle according to claim 12, wherein the emitting ferrite comprises a first ferrite front ring and a first ferrite rear ring arranged back and forth along its own axis, the first ferrite The front ring and the back ring of the first ferrite are spliced to form the emitting ferrite.
15. The ultrasonic spindle according to claim 12, wherein the emitting ferrite comprises a plurality of ferrite arc segments arranged along the circumferential direction of the emitting ferrite, and a plurality of the ferrite arc segments Splicing composes the emitting ferrite.
16. The ultrasonic spindle according to claim 1, wherein the launch frame comprises a launch frame body and a front cover, the rear end surface of the launch frame body is in contact with the front end surface of the front end cover, and the front cover plate is provided with The first accommodating groove is formed at the front end of the launcher body and together with the launcher body.
17. An ultrasonic tool holder, comprising:

    the handle body; and

    An ultrasonic wireless receiving device is sleeved on the handle body, and is used to cooperate with the ultrasonic wireless transmitting device described in claim 1 to realize ultrasonic wireless energy transmission.
18. The ultrasonic tool handle according to claim 17, wherein the outer surface of the tool handle body has a support part disposed at the front end of the ultrasonic wireless receiving device, and the rear end of the ultrasonic wireless receiving device is provided with a support part sleeved on the ultrasonic wireless receiving device. A fixing ring on the handle body, a second accommodating groove opposite to the first accommodating groove is formed between the support part and the fixing ring, and the ultrasonic wireless receiving device is arranged in the second accommodating groove .
19. The ultrasonic tool holder according to claim 18, wherein the ultrasonic wireless receiving device comprises a receiving coil arranged around the tool holder body and a receiving ferrite for accommodating the receiving coil, the receiving ferrite The body includes a second bottom wall and second side walls arranged on both sides of the second bottom wall. The positions of the side surfaces of the second accommodating slots correspond to each other, and the receiving coils are arranged in the second grooves enclosed by the second bottom wall and the second side walls.
20. The ultrasonic tool holder according to claim 19, wherein the receiving ferrite comprises a second ferrite front ring and a second ferrite rear ring arranged back and forth along its own axis, the second ferrite The body front ring and the second ferrite back ring are spliced to form the receiving ferrite.
21. An ultrasonic processing equipment, comprising:

    The ultrasonic spindle of any one of claims 1-16; and

    The ultrasonic tool handle of any one of claims 17-20;

    Wherein, the rear end of the handle body is inserted into the installation hole, and a first gap is formed between the outer side of the handle body and the inner side of the transmitting frame, and the outer side of the ultrasonic wireless receiving device is connected to the inner side of the transmitting frame. A second gap communicated with the first gap is formed between the inner sides of the ultrasonic wireless transmitting device.
22. The ultrasonic processing equipment according to claim 21, wherein an air cavity communicated with the first gap is provided between the inner side of the front end cover and the outer side of the rotating shaft assembly, and the spindle housing has a first gap. an air passage, the front end cover has a second air passage which communicates with the first air passage and the air cavity.
23. The ultrasonic processing equipment according to claim 21, wherein the inner side of the transmitting frame has an annular boss, the rear end of the ultrasonic wireless receiving device is provided with a fixing ring sleeved on the tool holder body, the A third gap connecting the first gap and the second gap is formed between the front end surface of the annular boss and the rear end surface of the fixing ring.
24. The ultrasonic processing apparatus according to claim 21, wherein the width of the second gap is 0.1 mm-2.5 mm.

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