Ultrasonic knife handle

Abstract

The ultrasonic knife handle comprises a knife handle shell, an ultrasonic transducer, an ultrasonic receiving module and an ultrasonic transmitting module, the rear end of the ultrasonic transducer is fixedly connected in a cavity formed in the front end of the knife handle shell, and the front end of the ultrasonic transducer is used for being connected with a knife; the ultrasonic receiving module comprises a secondary magnetic core and a receiving coil; the ultrasonic transmitting module comprises a primary side magnetic core, a transmitting coil, a transmitting support and an ultrasonic input connector. The primary side magnetic core and the secondary side magnetic core are concentrically arranged, the inner wall of the primary side magnetic core is in clearance fit with the outer wall of the secondary side magnetic core, and the circle center angle of the primary side magnetic core ranges from pi / 4 to 3pi / 2. According to the ultrasonic cutter handle, the requirement for automatic cutter changing still can be met after an ultrasonic system is additionally arranged on a machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic processing, in particular to an ultrasonic tool shank. Background Art

[0002] With the rise of new hard and brittle composite materials in recent years, the scope of application of new hard and brittle composite materials is becoming wider and wider, and the proportion of new hard and brittle composite materials in the mechanical processing industry is also increasing. At the same time, people's requirements for the parts processed from difficult-to-machine materials are getting higher and higher. Rotary ultrasonic processing technology is considered to be one of the effective methods for processing hard and brittle composite materials.

[0003] At present, the ultrasonic function is added to a general machine tool by installing a rotary ultrasonic processing system. In a rotary ultrasonic processing equipment, a non-contact electromagnetic coupler is a key structure for realizing non-contact energy transmission between an ultrasonic power supply and an ultrasonic tool shank that rotates at a high speed with the machine tool spindle. The non-contact electromagnetic coupler consists of a primary structure and a secondary structure of the coupler. The primary of the coupler is relatively fixed to the outer protective shell of the machine tool spindle, the secondary of the coupler is fixedly connected to the machine tool spindle that rotates at a high speed, and the relative positions of the primary and secondary of the coupler can couple with each other while maintaining the magnetic cores, so that when the machine tool is working, an ultrasonic-frequency electrical signal can be transmitted to the secondary of the coupler and output to an ultrasonic oscillator connected to the secondary of the coupler to drive the tool to perform rotary ultrasonic processing.

[0004] When the magnetic core structures of the upper and lower rings of the ultrasonic power supply part in a rotary ultrasonic processing system are applied to a machining center, there is an interference between the automatic tool changer of the machining center and the primary fixed ring of the non-contact electromagnetic coupler. And because the ultrasonic tool shank needs to have a secondary coupling structure to receive electric energy, the maximum diameter of the ultrasonic tool shank will be much larger than that of a conventional ultrasonic tool shank, and there is also an interference between the tool shanks when the ultrasonic tool shank is put into the tool magazine.

[0005] In addition, there are usually two types of energy transmission methods for the coupler: tight-coupling energy transmission and loose-coupling energy transmission. The difference between the two lies in whether the magnetic core structure between the primary and secondary of the coupler is closed. The loose-coupling energy transmission method is adopted in the rotary ultrasonic processing technology. The primary magnetic core and the secondary magnetic core of the loose-coupling energy transmission are not closed. Since the primary magnetic core and the secondary magnetic core of the non-contact electromagnetic coupler cannot be closed and connected, and the non-closed part is often filled with media with low magnetic permeability such as air and water, there is a large magnetic leakage at the air gap. This results in that the magnetic flux emitted by the primary coil cannot be completely received by the secondary coil, which limits the power transmission capacity and transmission efficiency. During the operation of the rotary ultrasonic system, the power supply part of the rotary ultrasonic system will generate heat due to low transmission efficiency, reducing the service life of the ultrasonic system.

[0006] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the present utility model, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Utility Model

[0007] To solve the above technical problems, the present utility model proposes an ultrasonic tool holder, which realizes the requirement of automatic tool change after adding an ultrasonic system to a machine tool.

[0008] To achieve the above object, the present utility model adopts the following technical solutions:

[0009] The present utility model discloses an ultrasonic tool holder, including a tool holder housing, an ultrasonic transducer, an ultrasonic receiving module, and an ultrasonic transmitting module. The rear end of the ultrasonic transducer is fixedly connected in a cavity opened at the front end of the tool holder housing, and the front end of the ultrasonic transducer is used to connect a tool; the ultrasonic receiving module includes a secondary core and a receiving coil, the receiving coil is wound around the secondary core, the inner wall of the secondary core is closely fitted with the outer wall of the tool holder housing, and a hole is opened in the tool holder housing so that the receiving coil passes through the hole and is electrically connected to the ultrasonic transducer in the cavity; the ultrasonic transmitting module includes a primary core, a transmitting coil, a transmitting bracket, and an ultrasonic input connector, the transmitting coil is wound around the primary core, the primary core and the transmitting coil are both placed inside the transmitting bracket, and the ultrasonic input connector is arranged at one end of the transmitting bracket; the primary core and the secondary core are concentrically arranged, and the inner wall of the primary core has a clearance fit with the outer wall of the secondary core, wherein the central angle of the primary core is between π / 4 and 3π / 2.

[0010] Preferably, the air gap between the inner wall of the primary core and the outer wall of the secondary core is between 0.1 mm and 2 mm.

[0011] Preferably, the outer diameter of the secondary core is greater than the outer diameter of the tool holder housing at the connection of the secondary core and less than or equal to 5 / 4 of the outer diameter of the tool holder housing at the connection of the secondary core.

[0012] Preferably, the secondary core includes an upper bottom surface of the secondary core and a lower bottom surface of the secondary core, and the upper bottom surface of the secondary core and the lower bottom surface of the secondary core are integrally connected or connected by a clearance fit of a hole and a shaft to form a C-shaped secondary core, and the receiving coil is wound in a groove of the C-shaped secondary core.

[0013] Preferably, the inner wall of the secondary core is a conical structure, and correspondingly, the position of the tool holder housing corresponding to the secondary core is a conical structure.

[0014] Preferably, the lengths of the secondary core and the primary core in the axial direction are respectively greater than or equal to the inner radius of the secondary core.

[0015] Preferably, the ampere-turns of the ultrasonic transmitting module satisfy the following relationship:

[0016]

[0017] where N1 is the number of turns of the transmitting coil, I max1 is the rated maximum current input to the ultrasonic transmitting module, P max is the maximum instantaneous output power of the ultrasonic controller connected to the ultrasonic transmitting module, l g is the air gap between the inner wall of the primary core and the outer wall of the secondary core, μ0 is the permeability of free space, F is the fringe flux coefficient between the ultrasonic transmitting module and the ultrasonic receiving module, K f is the input electrical signal waveform coefficient, f is the frequency of the electrical signal given by the ultrasonic controller connected to the ultrasonic transmitting module to the ultrasonic transmitting module, Ae is the effective magnetic circuit area between the ultrasonic transmitting module and the ultrasonic receiving module, B max is the magnetic flux saturation density of the primary core and the secondary core.

[0018] Preferably, the ampere-turns of the ultrasonic receiving module satisfy the following relationship:

[0019]

[0020] where N2 is the number of turns of the receiving coil, I max2 is the rated maximum current input to the ultrasonic receiving module, P max is the maximum instantaneous output power of the ultrasonic controller connected to the ultrasonic transmitting module, l g is the air gap between the inner wall of the primary core and the outer wall of the secondary core, μ0 is the permeability of free space, F is the fringe flux coefficient between the ultrasonic transmitting module and the ultrasonic receiving module, K f is the input electrical signal waveform coefficient, f is the frequency of the electrical signal given by the ultrasonic controller connected to the ultrasonic transmitting module to the ultrasonic transmitting module, Ae is the effective magnetic circuit area between the ultrasonic transmitting module and the ultrasonic receiving module, B max is the magnetic flux saturation density of the primary core and the secondary core.

[0021] Preferably, the expression for the effective magnetic circuit area Ae between the ultrasonic transmitting module and the ultrasonic receiving module is:

[0022] A e = SA1 +S A2

[0023] Wherein, S A1 represents the effective magnetic path area of the air gap between the upper bottom surface of the primary core and the upper bottom surface of the secondary core, and S A2 represents the effective magnetic path area of the air gap between the lower bottom surface of the primary core and the lower bottom surface of the secondary core; wherein:

[0024]

[0025] Wherein, θ represents the central angle of the primary core, D2 represents the outer diameter of the secondary core, and d A1 takes the smaller value of the thickness of the upper bottom surface of the primary core and the thickness of the upper bottom surface of the secondary core, and d A2 takes the smaller value of the thickness of the lower bottom surface of the primary core and the thickness of the lower bottom surface of the secondary core. Wherein, when the thickness of the upper bottom surface of the primary core is equal to the thickness of the upper bottom surface of the secondary core, d A1 takes the value of any one of them; when the thickness of the lower bottom surface of the primary core is equal to the thickness of the lower bottom surface of the secondary core, d A2 takes the value of any one of them.

[0026] Preferably, the expression of the edge magnetic flux coefficient F between the ultrasonic transmitting module and the ultrasonic receiving module is:

[0027]

[0028] Wherein, D3 is the outer radius of the primary core, D1 is the inner diameter of the secondary core, d5 is the inner wall thickness of the secondary core, and d6 is the outer wall thickness of the primary core.

[0029] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the ultrasonic tool shank proposed by the present utility model, the central angle of the primary core of the ultrasonic transmitting module is controlled between π / 4 and 3π / 2. On the one hand, it can ensure a relatively large coupling area under external condition constraints. On the other hand, it can also meet the clearance angle of the automatic tool changer of all machining center machine tools on the market. The wireless power supply system has strong applicability on the machining center machine tool. Therefore, without changing the machining center machine tool, it can still meet the automatic tool change requirement after adding the ultrasonic system to the ordinary machine tool, improving the machining efficiency after adding the ultrasonic, which has very important significance.

[0030] In a further aspect, the present utility model also has the following beneficial effects:

[0031] (1) The secondary core can be designed in a split form, divided into the upper bottom surface and the lower bottom surface of the secondary core, which can be processed by ordinary machine tools, reducing the processing difficulty of parts and improving the processing efficiency of parts. At the same time, the split design facilitates the assembly of the coil during the assembly stage, improving the production efficiency of the ultrasonic tool holder.

[0032] (2) The axial lengths of the secondary core and the primary core are greater than or equal to the inner radius of the secondary core, making it more slender than the existing ultrasonic module, and the maximum diameter part of the tool holder is controlled within 1 / 4 larger than the diameter of the standard part of the tool holder head, solving the interference problem between tool holders after the existing ultrasonic tool holder is incorporated into the tool magazine.

[0033] (3) By controlling the ampere-turns of the ultrasonic transmitting module or the ultrasonic receiving module within a preset range, a better power transmission effect can be achieved when the geometric structure is basically determined, so that the role of the primary core or the secondary core as a magnetic conductor can be fully utilized, avoiding magnetic saturation heating during the power transmission process. Description of the Drawings

[0034] Figure 1 is a schematic structural diagram of the ultrasonic tool holder according to the preferred embodiment of the present invention;

[0035] Figure 2 is a detailed schematic diagram of the wireless power supply system of the ultrasonic tool holder according to the preferred embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of the wireless transmission core according to the preferred embodiment of the present invention;

[0037] Figure 4 is a cross-sectional view of the structure of the wireless transmission core according to the preferred embodiment of the present invention;

[0038] Figure 5 is a bottom view of the structure of the wireless transmission core according to the preferred embodiment of the present invention;

[0039] Figure 6 is a schematic diagram of the external dimensions of the ultrasonic tool holder according to the preferred embodiment of the present invention;

[0040] Figure 7 is a schematic structural diagram of the conical core according to another preferred embodiment of the present invention;

[0041] Figure 8 is Figure 7 the schematic diagram of the installation structure of the conical core shown in the embodiment;

[0042] Figure 9 is a schematic structural diagram of the conical core according to another preferred embodiment of the present invention. Detailed Description of the Invention

[0043] The following provides a detailed description of the embodiments of the present utility model. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present utility model.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. Additionally, the connection can be for a fixing function or for a circuit / signal communication function.

[0045] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0046] Furthermore, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0047] For the convenience of clearly explaining the positional relationship between each structure, the "front" described in the embodiments of the present utility model refers to the direction where the installation position of the tool in the overall ultrasonic tool handle is located, and the "rear" refers to the direction opposite to the "front".

[0048] Based on the difficulties of the prior art, the preferred embodiment of the present utility model provides an ultrasonic tool handle wireless power supply system that reduces the maximum diameter of the ultrasonic tool handle and optimizes the wireless transmission part, improves the energy transmission efficiency of the rotary ultrasonic system, and realizes the requirement of automatic tool change still being met after adding the ultrasonic system to the machine tool.

[0049] As Figure 1 shown, the preferred embodiment of the present utility model discloses an inner and outer ring type wireless power supply system for an ultrasonic tool handle, including a tool handle housing 1, an ultrasonic receiving module 2, an ultrasonic transducer 3, and an ultrasonic transmitting module 4. The rear end of the ultrasonic transducer 3 is fixedly connected in the cavity opened at the front end of the tool handle housing 1, and the front end of the ultrasonic transducer 3 is used to connect the tool 307.

[0050] As Figure 2As shown, the ultrasonic emission module 4 includes a primary core 401, an emission coil 402, an emission bracket 403, and an ultrasonic input connector 404. The emission coil 402 is wound around the primary core 401, and the number of turns of the emission coil 402 is N1. Both the primary core 401 and the emission coil 402 are placed inside the emission bracket 403. The ultrasonic input connector 404 is set at one end of the emission bracket 403 for connecting to an ultrasonic generator.

[0051] The ultrasonic receiving module 2 includes a secondary core 201 and a receiving coil 202, and the number of turns of the receiving coil 202 is N2. As Figure 3 shown Figure 4 In this embodiment, the secondary core 201 adopts a split design. The upper bottom surface 2011 and the lower bottom surface 2012 of the secondary core form a complete C-shaped secondary core 201. The upper bottom surface 2011 and the lower bottom surface 2012 of the secondary core are tightly connected through clearance fit of a hole and a shaft. The inner edge of the secondary core 201 is tightly fitted with the outer edge of the tool handle housing 1, and the receiving coil 202 is wound in the groove of the C-shaped secondary core 201.

[0052] The ultrasonic transducer 3 includes a screw 301, a rear cover plate 302, a piezoelectric ceramic sheet 303, a horn 304, a collet 305, and a nut 306. Among them, the piezoelectric ceramic sheet 303 is fixed on the horn 304 through the screw 301 and the rear cover plate 302. The inner edge of the upper end of the horn 304 is provided with an internal thread, and the outer edge of the lower end of the tool handle housing 1 is provided with an external thread. The horn 304 is fixed on the tool handle housing 1 through thread fit. A hole is opened on the tool handle housing 1 so that the receiving coil 202 can be connected to the piezoelectric ceramic sheet 303 built in the ultrasonic transducer 3 through a wire. The bottom of the lower bottom surface 2012 of the secondary core sits on the upper end of the horn 304.

[0053] As Figure 4 shown, the inner diameter of the inner circle of the C-shaped secondary core 201 is D1, and the outer diameter of the outer circle is D2. The core thickness of the upper bottom surface 2011 of the secondary core is d1, the core thickness of the lower bottom surface 2012 of the secondary core is d2, the height between the upper bottom surface 2011 and the lower bottom surface 2012 of the secondary core is h1, and the inner wall thickness of the secondary core 201 is d5. The primary core 401 and the secondary core 201 are concentric, and the diameters of the inner circle of the primary core 401 and the outer circle of the secondary core 201 are both D2, but there is an air gap between the inner circle of the primary core 401 and the outer circle of the secondary core 201; the outer radius of the primary core 401 is D3, the thickness of the upper bottom surface 4011 of the primary core is d3, the thickness of the lower bottom surface 4012 of the primary core is d4, the height between the upper bottom surface 4011 and the lower bottom surface 4012 of the primary core is h2, and the outer wall thickness of the primary core 401 is d6. Further, the thicknesses of the primary core 401 and the secondary core 201 are the same, that is, h 1+ d1+ d2 = h 2+ d 3+ d4; Align in the axial direction, that is, the top and bottom surfaces of the primary core 401 and the secondary core 201 coincide in the axial direction.

[0054] Among them, the above-mentioned primary and secondary side dimension parameters D1, D2, D3, d1, d2, d3, d4, d5, d6, h1, h2 can all be obtained through tests using a length measurement tool, such as a micrometer.

[0055] The central angle of the primary core of the ultrasonic emission module 4 is θ, where, As Figure 5 shown, the primary core angle used in this embodiment This ultrasonic emission module with a small angle can meet the clearance angle of all automatic tool changers of machining center machine tools on the market, and this wireless power supply system has strong applicability in machining center machine tools.

[0056] The effective magnetic circuit area of the upper bottom surface of the primary core of the ultrasonic emission module is S1, and the magnetic circuit area of the lower bottom surface of the transmitter core is S2. The relationship between S1, S2 and the core structure dimensions is as follows:

[0057]

[0058] The effective magnetic circuit area of the upper bottom surface of the secondary core of the ultrasonic receiving module is S3, and the magnetic circuit area of the lower bottom surface of the transmitter secondary core is S4. The relationship between S3, S4 and the core structure dimensions is as follows:

[0059]

[0060] The effective magnetic circuit area of the air gap between the upper bottom surface of the primary core of the ultrasonic emission module and the upper bottom surface of the secondary core of the ultrasonic receiving module is S A1 , and the effective magnetic circuit area of the air gap between the lower bottom surface of the ultrasonic emission module core and the lower bottom surface of the secondary core of the ultrasonic receiving module is S A2 .

[0061] When d1 = d3, then there is:

[0062]

[0063] When d1 > d3, then there is:

[0064]

[0065] When d1 < d3, then there is:

[0066]

[0067] When d2 = d4, then there is:

[0068]

[0069] When d2 > d4, then there is:

[0070]

[0071] When d2 < d4, then there is:

[0072]

[0073] The air gap interval between the ultrasonic emission module and the ultrasonic reception module is l g , 0.1mm ≤ l g ≤ 2mm.

[0074] The edge magnetic flux coefficient of the magnetic cores of the ultrasonic emission module and the ultrasonic reception module is F, and the effective magnetic path area is Ae. Their relationship with the above parameters is as follows:

[0075]

[0076] The frequency of the electrical signal input by the ultrasonic controller to the ultrasonic emission module is f Hz, and the waveform coefficient of the input electrical signal is K f , the maximum instantaneous output power of the ultrasonic controller is P max , the rated maximum current I input to the ultrasonic emission module max1 , the rated maximum current I input to the ultrasonic reception module max2 . max , the magnetic flux saturation density of the primary and secondary magnetic cores is B

[0077] The ultrasonic emission module and the ultrasonic reception module of the present utility model are key structures for realizing contactless energy transmission between the ultrasonic power supply and the ultrasonic tool shank that rotates at high speed with the machine tool spindle. The ultrasonic emission module is relatively fixed to the outer protective shell of the machine tool spindle, the ultrasonic reception module is fixedly connected to the high-speed rotating machine tool spindle, and the relative positions of the ultrasonic emission module and the ultrasonic reception module can be coupled with each other. In this way, when the machine tool is working, the electrical signal of the ultrasonic frequency can be transmitted to the ultrasonic reception module and output to the ultrasonic transducer connected to the secondary ultrasonic reception module of the coupler, driving the tool to generate ultrasonic frequency vibrations when rotating, improving the processing effect.

[0078] Furthermore, the structures of the ultrasonic emission module and the ultrasonic reception module and the electromagnetic parameters of their structural materials are respectively represented by the following relational expressions:

[0079] The ampere-turn design of the ultrasonic emission module satisfies the following relational expression:

[0080]

[0081] The ampere-turn design of the ultrasonic receiving module satisfies the following relationship:

[0082]

[0083] The core structure design of the ultrasonic transmitting module and the ultrasonic receiving module is theoretically calculated through formulas (1)-(12) to see whether its structural parameters satisfy the relationships (13)-(16). Then, under the condition of applying the rated maximum current, check whether the turn design is reasonable. Specifically, there may be two unreasonable situations: (1) If the ranges of ampere-turns obtained through formulas (13)-(16) have no intersection, it means that the core structure cannot meet the power required to be transmitted by the core, which will cause magnetic saturation heating of the core. This unreasonable situation requires redesigning the core structure, that is, modifying the dimensions of the core structure again so that the ranges obtained from the ampere-turn design formulas (13)-(16) of the corresponding module have an intersection. (2) If the ranges of ampere-turns obtained through formulas (13)-(16) have an intersection, and further when the rated maximum current is applied, the turn range can be obtained. However, if the actual turn range is not within the calculated turn range, it will also cause magnetic saturation of the core, resulting in heating of the core and the coil; this unreasonable situation only needs to change the number of turns to be within the reasonable range.

[0084] When the number of turns of the transmitting coil and the receiving coil can satisfy the relationships (13)-(16), it can ensure that the core does not become magnetically saturated during operation, reduce the temperature rise of the ultrasonic transmitting module and the ultrasonic receiving module caused by magnetic saturation, and improve the service life of the wireless transmission system; thus, further under the conditions of external constraints (mainly the tool holder interface standard and the requirements for automatic tool change), relatively high-efficiency power transmission can be achieved and heat loss can be avoided.

[0085] As mentioned above, the design of the ultrasonic transmitting module and the ultrasonic receiving module can be summarized as including the following steps A1 to A3 (design steps for the ultrasonic transmitting module) and steps B1 to B3 (design steps for the ultrasonic receiving module):

[0086] A1: Check whether there is an intersection between the following two ampere-turn relationships of the ultrasonic transmitting module. If there is an intersection, execute step A2; otherwise, execute step A3;

[0087]

[0088] where N1 is the number of turns of the transmitting coil, I max1 is the rated maximum current input to the ultrasonic transmitting module, and P max is the maximum instantaneous output power of the ultrasonic controller connected to the ultrasonic transmitting module, and l gis the air gap interval between the inner wall of the primary core and the outer wall of the secondary core, μ0 is the permeability of free space, F is the fringe flux coefficient between the ultrasonic transmitting module and the ultrasonic receiving module, K f is the input electrical signal waveform coefficient, f is the frequency of the electrical signal given by the ultrasonic controller connected to the ultrasonic transmitting module to the ultrasonic transmitting module, Ae is the effective magnetic circuit area between the ultrasonic transmitting module and the ultrasonic receiving module, B max is the magnetic flux saturation density of the primary core and the secondary core;

[0089] A2: Design the number of turns of the transmitting coil according to the two ampere-turn relationships in step A1;

[0090] A3: Modify the structural dimensions of the primary core again and return to step A1;

[0091] B1: Check whether there is an intersection between the following two ampere-turn relationships of the ultrasonic receiving module. If there is an intersection, execute step B2; otherwise, execute step B3;

[0092]

[0093] In the formula, N2 is the number of turns of the receiving coil, I max2 is the rated maximum current input to the ultrasonic receiving module;

[0094] B2: Design the number of turns of the receiving coil according to the two ampere-turn relationships in step B1;

[0095] B3: Modify the structural dimensions of the secondary core again and return to step B1.

[0096] In the preferred embodiment of the present invention, the structural parameters of the ultrasonic transmitting module and the ultrasonic receiving module are related to the product of the rated maximum current and the number of turns of the coil, reflecting whether the design of the core structure can ensure normal operation under the rated maximum current. Thereby simplifying the core design process and providing theoretical support for the rotating ultrasonic wireless transmission part.

[0097] Specifically, in order to verify that the ultrasonic transmitting module and the ultrasonic receiving module provided by the embodiment of the present invention have a lower temperature rise and an amplitude growth rate compared with the prior art after the rated maximum current is applied based on the above relationships, two groups of tests were carried out. Refer to the following table:

[0098] In Table 1A and Table 1B, the structural designs of the first ultrasonic transmitting module and the first ultrasonic receiving module satisfy the relationship between their structures and the product of ampere-turns. For the first two rows in Table 1A, when the rated maximum current is applied, the number of turns is designed within the value range. For the last two rows, when the rated maximum current is applied, the number of turns is not designed within the value range. Comparing the two, the temperature rise of the former is lower than that of the latter, and the amplitude of the former is higher than that of the latter.

[0099] Table 1A

[0100]

[0101] Table 1B

[0102]

[0103]

[0104] In Table 2A and Table 2B, the structural designs of the second ultrasonic transmitting module and the second ultrasonic receiving module do not satisfy the relationship between their structures and the product of ampere-turns. When the same current is applied, the temperature rise of Table 2 is higher than that of Table 1, and the amplitude of Table 2 is lower than that of Table 1.

[0105] Table 2A

[0106]

[0107] Table 2B

[0108]

[0109]

[0110] From the above Table 1A, Table 1B, Table 2A, and Table 2B, it can be seen that when the magnetic core structure and the number of turns design conform to the relationship formula proposed in the preferred embodiment of the present invention, the ultrasonic wireless power supply system and the amplitude of the ultrasonic tool handle can both achieve better performance. Therefore, the rationality of the magnetic core structure can be verified through the relationship formula proposed in the preferred embodiment of the present invention.

[0111] Such as Figure 6As shown, the maximum diameter B of the ultrasonic tool shank (i.e., the outer diameter of the wireless receiving module 2) is set to 5 / 4 of the diameter A of the standard part of the tool shank 1 (i.e., the outer diameter of the tool shank housing 1 where the wireless receiving module 2 is connected). The magnetic core is arranged in a slender structure (specifically, for example, the axial length of the secondary magnetic core 201 and the primary magnetic core 401 is greater than or equal to the inner radius of the secondary magnetic core 201. The main purpose is to reduce the maximum diameter so that the ultrasonic tool shank can be incorporated into the tool magazine). The maximum diameter part B of the tool shank is controlled to be 1 / 4 larger than the diameter A of the standard part of the head of the tool shank 1, solving the interference problem between the tool shanks after the existing tool shanks are incorporated into the tool magazine. Without changing the machining center machine tool, it is possible to meet the automatic tool change requirement after adding the ultrasonic system to an ordinary machine tool, improving the machining efficiency after adding the ultrasonic, which has very important significance.

[0112] As Figure 7 and as Figure 8 shown, in some other preferred embodiments, the inner edge of the secondary magnetic core 201 can be arranged as a conical structure 2013, and the outer edge of the tool shank housing 1 is arranged as a conical structure 101. The bottom of the lower bottom surface 2012 of the secondary magnetic core is seated on the upper end of the horn 304. The secondary magnetic core 201 realizes axial positioning on the tool shank housing 1 through the cooperation of the conical structure 2013 and the conical structure 101.

[0113] As Figure 9 shown, in some other preferred embodiments, the C-shaped secondary magnetic core 201 can be an integral structure. In this structure, there is no assembly of parts in the split structure, and the energy transmission efficiency is higher than that of the split structure.

[0114] The ultrasonic tool shank provided by the preferred embodiment of the present invention has the following advantages:

[0115] (1) Without changing the machining center machine tool, the present invention can meet the automatic tool change requirement after adding the ultrasonic system to an ordinary machine tool, improving the machining efficiency after adding the ultrasonic, which has very important significance.

[0116] (2) Through the split design of the secondary magnetic core, it is divided into upper and lower parts, which can be processed by ordinary machine tools, reducing the processing difficulty of parts and improving the processing efficiency of parts. At the same time, the split design is convenient for the assembly of the coil during the assembly stage, improving the production efficiency of the ultrasonic tool shank.

[0117] (3) By theoretically calculating and controlling the relationship between the magnetic core structure and electrical parameters, the role of the magnetic core as a magnetic conductor is fully utilized, avoiding magnetic saturation heating during the electric energy transmission process.

[0118] (4) The circumferential angle θ is controlled at Within the range. The angular space occupied by the automatic tool changer manipulator of the machining center machine tool on the market is at most 270°, that is, 75% of the whole circle. The angle used in the embodiment is 70°. This small-angle ultrasonic emission module can meet the clearance angles of all automatic tool changer manipulators of the machining center machine tools on the market, and the wireless power supply system has strong applicability on the machining center machine tools.

[0119] (5) The magnetic core is set to be a slender structure, and the maximum diameter part of the tool shank is controlled to be 1 / 4 larger than the diameter of the standard part of the tool shank head, which solves the interference problem between the rear tool shanks when the existing tool shanks are incorporated into the tool magazine.

[0120] The background part of the present utility model may include background information about the problems or environment of the present utility model, rather than the prior art described by others. Therefore, the content included in the background art section is not an admission by the applicant of the prior art.

[0121] The above content is a further detailed description of the present utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several alternatives or modifications can be made to these described embodiments, and these alternative or modified ways should all be regarded as belonging to the protection scope of the present utility model. In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope defined by the appended claims.

Claims

1. An ultrasonic knife handle, characterized in that: It comprises a handle shell, an ultrasonic transducer, an ultrasonic receiving module and an ultrasonic transmitting module, wherein the rear end of the ultrasonic transducer is fixedly connected to a cavity opened at the front end of the handle shell, and the front end of the ultrasonic transducer is used to connect to a tool; The ultrasonic receiving module comprises a secondary magnetic core and a receiving coil, wherein the receiving coil is wrapped around the secondary magnetic core, the inner wall of the secondary magnetic core is tightly matched with the outer wall of the handle shell, and a hole is provided on the handle shell so that the receiving coil passes through the hole to be electrically connected to the ultrasonic transducer in the cavity; The ultrasonic transmitting module comprises a primary magnetic core, a transmitting coil, a transmitting bracket and an ultrasonic input connector, wherein the transmitting coil surrounds the primary magnetic core, the primary magnetic core and the transmitting coil are both placed inside the transmitting bracket, and the ultrasonic input connector is arranged at one end of the transmitting bracket; The primary magnetic core and the secondary magnetic core are arranged concentrically, and the inner wall of the primary magnetic core and the outer wall of the secondary magnetic core are gap-matched, wherein the center angle of the primary magnetic core is between π / 4 and 3π / 2.

2. The ultrasonic knife handle according to claim 1, characterized in that: The air gap between the inner wall of the primary magnetic core and the outer wall of the secondary magnetic core is between 0.1 mm and 2 mm.

3. The ultrasonic knife handle according to claim 1, characterized in that: The outer diameter of the secondary magnetic core is greater than the outer diameter of the handle housing at the connection point of the secondary magnetic core and is less than or equal to 5 / 4 of the outer diameter of the handle housing at the connection point of the secondary magnetic core.

4. The ultrasonic knife handle according to claim 1, characterized in that: The secondary magnetic core includes an upper bottom surface of the secondary magnetic core and a lower bottom surface of the secondary magnetic core. The upper bottom surface of the secondary magnetic core and the lower bottom surface of the secondary magnetic core are integrally connected or connected through a hole-axis clearance fit to form a secondary magnetic core with a C-shaped structure. The receiving coil is surrounded by a groove of the secondary magnetic core with a C-shaped structure.

5. The ultrasonic knife handle according to claim 1, characterized in that: The inner wall of the secondary magnetic core is a conical structure, and correspondingly, the corresponding matching position of the handle shell and the secondary magnetic core is a conical structure.

6. The ultrasonic knife handle according to claim 1, characterized in that: The lengths of the secondary magnetic core and the primary magnetic core along the axial direction are respectively greater than or equal to the inner circle radius of the secondary magnetic core.

7. The ultrasonic knife handle according to claim 1, characterized in that: The ampere-turns of the ultrasonic transmitting module satisfy the following relationship: Where, N1 is the number of turns of the transmitting coil, I max1 is the rated maximum current of the ultrasonic transmitter module, P max is the maximum instantaneous output power of the ultrasonic controller connected to the ultrasonic transmitting module, l g is the air gap between the inner wall of the primary magnetic core and the outer wall of the secondary magnetic core, μ0 is the vacuum magnetic permeability, F is the edge magnetic flux coefficient between the ultrasonic transmitting module and the ultrasonic receiving module, K f is the input electrical signal waveform coefficient, f is the frequency of the electrical signal sent to the ultrasonic transmitting module by the ultrasonic controller connected to the ultrasonic transmitting module, Ae is the effective magnetic circuit area between the ultrasonic transmitting module and the ultrasonic receiving module, B max is the magnetic flux saturation density of the primary magnetic core and the secondary magnetic core.

8. The ultrasonic knife handle according to claim 1, characterized in that: The ampere-turns of the ultrasonic receiving module satisfy the following relationship: Where, N2 is the number of turns of the receiving coil, I max2 is the rated maximum current of the ultrasonic receiving module, P max is the maximum instantaneous output power of the ultrasonic controller connected to the ultrasonic transmitting module, l g is the air gap between the inner wall of the primary magnetic core and the outer wall of the secondary magnetic core, μ0 is the vacuum magnetic permeability, F is the edge magnetic flux coefficient between the ultrasonic transmitting module and the ultrasonic receiving module, K f is the input electrical signal waveform coefficient, f is the frequency of the electrical signal sent to the ultrasonic transmitting module by the ultrasonic controller connected to the ultrasonic transmitting module, Ae is the effective magnetic circuit area between the ultrasonic transmitting module and the ultrasonic receiving module, B max is the magnetic flux saturation density of the primary magnetic core and the secondary magnetic core.

9. The ultrasonic knife handle according to claim 7 or 8, characterized in that: The expression of the effective magnetic circuit area Ae between the ultrasonic transmitting module and the ultrasonic receiving module is: A e =S A1 +S A2 In the formula, S A1 represents the effective magnetic path area of ​​the air gap between the upper bottom surface of the primary magnetic core and the upper bottom surface of the secondary magnetic core, S A2 represents the effective magnetic path area of ​​the air gap between the lower bottom surface of the primary magnetic core and the lower bottom surface of the secondary magnetic core; wherein: Wherein, θ represents the center angle of the primary magnetic core, D2 represents the outer diameter of the secondary magnetic core, and d A1 The value is the smaller value of the thickness of the upper bottom surface of the primary magnetic core and the thickness of the upper bottom surface of the secondary magnetic core, d A2 The value is the smaller value of the thickness of the lower bottom surface of the primary magnetic core and the thickness of the lower bottom surface of the secondary magnetic core; when the thickness of the upper bottom surface of the primary magnetic core is equal to the thickness of the upper bottom surface of the secondary magnetic core, d A1 Take any one of the values; when the thickness of the bottom surface of the primary magnetic core is equal to the thickness of the bottom surface of the secondary magnetic core, d A2 The value is any one of them.

10. The ultrasonic knife handle according to claim 7 or 8, characterized in that: The expression of the edge magnetic flux coefficient F between the ultrasonic transmitting module and the ultrasonic receiving module is: In the formula, D3 is the outer circle radius of the primary magnetic core, D1 is the inner circle diameter of the secondary magnetic core, d5 is the inner wall thickness of the secondary magnetic core, and d6 is the outer wall thickness of the primary magnetic core.

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