TWI803877B - Ultrasonic processing device - Google Patents

Abstract

An ultrasonic processing device, including a piezoelectric driver, a tool, a horn, a filling material, and a restraint, the piezoelectric driver is used to receive signals to generate longitudinal ultrasonic vibrations, and the opposite ends of the horn are respectively connected to the piezoelectric driver and the tool , the horn has a cone section, the outer wall of the cone section is provided with a groove, and the restraint is arranged on the cone section to close the opening of the groove, so that the horn can convert the longitudinal ultrasonic vibration provided by the piezoelectric driver into longitudinal torsion The composite vibration is transmitted to the tool; the filling material is used to fill the groove, and the filling material filled in the groove can reduce the vibration and high-frequency noise caused by the unstable air flow of the horn under high-speed rotation, and the restraint The parts can prevent the filling material from falling out of the groove when the horn rotates at high speed.

Description

Ultrasonic processing device

The present invention is related to an ultrasonic processing device; in particular, it refers to a longitudinal-twisting composite ultrasonic processing device.

It is known that with the continuous improvement of modern technology and industry requirements for materials, especially in the fields of semiconductors, optoelectronics, aerospace, medical equipment, energy, electric vehicles, 3C electronics and precision manufacturing, materials with properties such as lightweight, toughness and toughness are often used. Special materials with high temperature resistance and other properties. However, these special materials often have characteristics such as high strength, high hardness, and high brittleness. However, traditional processing devices have poor processing effects and low efficiency for these special materials such as high strength, high hardness, and high brittleness, and cannot meet the processing accuracy requirements of such materials. Compared with traditional processing devices, ultrasonic processing devices have the advantages of reducing cutting force, reducing tool wear, improving workpiece surface accuracy, increasing processing efficiency and prolonging tool life, and are widely used in the aforementioned fields.

A general ultrasonic processing device includes a piezoelectric driver, a horn and a tool. The horn is connected to the piezoelectric driver and the tool respectively. The piezoelectric driver converts electrical energy into mechanical vibration energy and generates vibration. The vibration generated by the driver is amplified and then transmitted to the tool. The vibration mode is mostly longitudinal vibration mode. However, a single longitudinal vibration can easily lead to excessive axial impact force, which not only affects the surface processing effect of hard and brittle materials, but also makes the The materials used for the tool are limited and the versatility is poor. Therefore, the conventional ultrasonic processing device still needs to be improved.

In view of this, the object of the present invention is to provide an ultrasonic processing device capable of providing longitudinal-torsional compound vibration.

In order to achieve the above object, an ultrasonic processing device provided by the present invention includes a piezoelectric driver, a cutter, a horn and a filling material. The piezoelectric driver is used to receive a signal to generate longitudinal ultrasonic vibration. The opposite ends of the horn are respectively connected to the piezoelectric driver and the tool, the horn has a conical section, the outer wall of the cone section is provided with at least one groove, whereby the horn can provide the piezoelectric driver The longitudinal ultrasonic vibration is converted into longitudinal-torsional composite vibration and transmitted to the tool; the filling material is used to fill in the at least one groove.

The effect of the present invention is that part of the longitudinal ultrasonic vibration is converted into torsional vibration by providing at least one groove on the horn. In this way, the ultrasonic processing device of the present invention can make the tool produce both longitudinal and torsional vibrations. The longitudinal and torsional compound vibration is used to improve the problem that the single longitudinal vibration mode of the conventional ultrasonic processing device causes excessive axial impact force, affects the surface processing effect of hard and brittle materials, and limits the materials used for the tool. In addition, the vibration and high-frequency noise caused by the unstable air flow of the horn during high-speed rotation can be reduced by the filling material filled in the at least one groove.

In order to illustrate the present invention more clearly, preferred embodiments are given and detailed descriptions are given below in conjunction with drawings. Please refer to Fig. 1 to Fig. 4, which is an ultrasonic processing device 1 of a preferred embodiment of the present invention, including a cutter bar 10, an electric energy transmission device 20, a piezoelectric driver 30, a horn 40 and a tool 50, the cutter bar 10 is used to connect the main shaft of BT, HSK or any interface and connect the horn 40, the electric energy transmission device 20 is arranged on the cutter bar 10 and is electrically connected with the piezoelectric driver 30, the electric energy The transmission device 20 can transmit electric energy through contact or non-contact. The piezoelectric driver 30 receives a signal output from the electric energy transmission device 20 and then converts the electric energy into vibration mechanical energy to generate longitudinal ultrasonic vibration. In the embodiment, the piezoelectric actuator 30 includes two piezoelectric sheets 32, which can be driven by electric energy to generate high-frequency oscillations, and the opposite ends of the horn 40 are connected to the piezoelectric actuator 30 and the piezoelectric actuator 30 respectively. The tool 50 , whereby the horn 40 can receive the longitudinal ultrasonic vibration from the piezoelectric driver 30 and amplify it to output to the tool 50 .

Please refer to FIG. 2 to FIG. 3, the horn 40 has a conical section 401, the outer wall of the conical section 401 is provided with a plurality of grooves 402, and the outer wall of the conical section 401 is away from the end of the tool 50 and close to the One end of the cutter 50 is tapered, as shown in FIG. 3 , the conical segment 401 has a first segment 401 a connected to it and a second segment 401 b, and the first segment 401 a is arranged far away from the cutter 50 relative to the second segment 401 b. position, the wall thickness of the first section 401a is greater than the wall thickness of the second section 401b and the first section 401a has the grooves 402, the second section 401b is connected to a collet 60, and the collet 60 is used for The cutter 50 is held. Thereby, the horn 40 can convert the longitudinal ultrasonic vibration provided by the piezoelectric driver 30 into torsional vibration through the grooves 402 and transmit the longitudinal-torsional composite vibration to the tool 50 .

The ultrasonic processing device 19 includes a filling material G for filling in each of the grooves 402, wherein the filling material G may include epoxy resin (Epoxy), vinyl ester resin (vinyl ester resin), ultraviolet curing Glue (UV glue), polyurethane (polyurethane) or acrylic resin (acrylic resin) material, in practice, the filling material G can be a liquid material, the filling material can be filled in each of the grooves 402 and in each of the After curing in the grooves 402, the outer surface S1 of the filling material G filled in each of the grooves 402 is flush with the outer wall S2 of the conical section 401 as shown in FIG. The filling material G filled in each of the grooves 402 can reduce unnecessary vibration and high-frequency noise caused by the unstable air flow of the horn 40 under high-speed rotation, so as to further improve processing quality and reduce environmental noise.

Please refer to FIG. 3 , the ultrasonic processing device 1 includes a binding member F, which is arranged on the outer peripheral wall of the conical section 401 to close the openings of the grooves 402, whereby the filling material G can be firmly arranged in the Each of the grooves 402 is used to prevent the filling material G from being thrown away from each of the grooves 402 due to centrifugal force when the horn 40 rotates at a high speed. It is further explained that, in this embodiment, the restraining member F is a strip of carbon fiber material and is wound around the outer peripheral wall of the conical section 401 by winding to close the openings of the grooves 402 to lift the restraining member F The tightness between the conical section 401 and other embodiments does not exclude that the restraint F is set on the conical section in other ways such as sleeves. In addition, in this embodiment, the restraint Part F is mainly made of carbon fiber. In practice, the restraining part can also be made of composite materials, non-magnetic materials or other materials such as glass, ceramics, aramid fiber, silicon carbide fiber, etc. The advantages of choosing composite materials That is, compared with metal materials, composite materials have higher structural strength, good tensile strength and high tension. At the same time, composite materials also have the characteristics of low density, light specific gravity, and light weight, which can achieve the effect of lightweight design .

In this embodiment, each of the grooves 402 is provided in such a way as to pass through the conical section 401 and communicate with an accommodating space inside the conical section 401, so as to increase the torsional amplitude of the horn 40 and the axial and The torsional flexibility improves the longitudinal displacement and torsional displacement of the tip of the cutter 50. If the grooves 402 passing through the conical section 401 are in the form of straight grooves, the longitudinal flexibility of the horn can be effectively improved. If the grooves 402 passing through the conical section 401 The groove 402 is in the form of a spiral groove, which can improve the longitudinal flexibility and torsional flexibility at the same time. In addition, the filling material filled in each groove can effectively avoid the cutting for removing chips or cooling the tool. The liquid leaks from the accommodating space through the grooves 402; in other embodiments, as shown in FIG. The outer wall of the conical section is concave, which can also reduce the unnecessary vibration and high-frequency noise caused by the unstable air flow of the horn under high-speed rotation through the filling material filled in each groove.

As shown in FIG. 4, it is defined that the outer wall of the conical section 401 has a plurality of force flow transmission paths R, and these force flow transmission paths R have the minimum distance for the horn 40 to transmit vibration from the piezoelectric driver 30 to the tool 50, The number of grooves located on each force flow transmission path R is less than or equal to one, that is to say, the same force flow transmission path R only passes through one groove 402 or does not pass through the groove 402 at all. For example, The force flow transmission path R1 does not pass through any groove during the force flow transmission process, while the force flow transmission path R2 only passes through one groove during the force flow transmission process. More specifically, the force flow transmission path R2 and the groove 402 There will be only one intersection. In this way, the horn 40 can not only convert part of the longitudinal ultrasonic vibration into torsional vibration, but also achieve the effect of minimizing the discontinuity of the force flow on the force flow transmission path.

Please cooperate with Fig. 5 and Fig. 6, these grooves 402 are arranged at intervals in the circumferential direction of the conical section 401 respectively, and the number of these grooves 402 is four, in this embodiment, the number of these grooves 402 is selected Four are used to make the stress distribution of the horn 40 uniform and the torsional vibration more stable. In other embodiments, it is not excluded that the number of these grooves is two, three or more than four. In this embodiment, by selecting the helix angle θ of these grooves 402 to be 30~100°, and the pitch p to be 3~200mm, only one groove 402 or no passage at all can be achieved on the same force flow transmission path R. The purpose of the groove 402, wherein the definition L is the length L of each of the grooves 402, p is the pitch p of each of the grooves 402, θ is the helix angle θ of each of the grooves 402, and the length of each of the grooves 402 The length L satisfies the condition of L=p(θ/360∘).

It is further explained that, in this embodiment, the groove width b of each of the grooves 402 is 0.2mm~10mm, and the conical section 401 has a maximum outer diameter D and a minimum outer diameter d at opposite ends, respectively. The groove width b of the groove 402 satisfies the condition of (D-d)/3~(D-d)/4, the groove depth h of the grooves 402 is 0.2mm~10mm, and the groove depth h of each groove 402 is between each The groove width b of the groove 402 is between 0.2 and 5 times. By satisfying the aforementioned conditions, the horn 40 can convert the longitudinal ultrasonic vibration provided by the piezoelectric actuator 30 into torsional vibration, so as to realize torsional composite processing. purpose without weakening the strength of the horn 40 at the same time.

In this embodiment, the horn 40 is described as an example with a plurality of grooves 402 on its surface. In practice, the number of grooves may be one or more. For example, the horn 41 It can also be shown in FIG. 7, a groove 403 is provided, wherein the groove 403 satisfies the helix angle θ1 between 30~100˚, the pitch between 3~20mm, the groove width b1 between 0.2~5mm and the groove depth The h1 ranges from 0.2 to 10mm. Through the above conditions, the ratio of part of the longitudinal ultrasonic vibration to torsional vibration can be effectively controlled, and the best longitudinal torsional vibration conversion efficiency can be obtained. In addition, in the foregoing embodiments, the grooves 402 are described with a fixed helix angle θ, groove depth h, and groove width b as an example. In practice, the helix angle, The groove depth and groove width are limited to a fixed value. For example, as shown in FIG. The angles are different, and the groove depth h2 and groove width b2 of the groove 404 are respectively set in such a way that the direction of the end of the groove gradually decreases.

In summary, the ultrasonic processing device 1 of the present invention converts part of the longitudinal ultrasonic vibration into torsional vibration by providing the groove 402 on the horn 40, so that the ultrasonic processing device 1 can make the tool 50 produces both longitudinal and torsional longitudinal torsional compound vibrations to improve the single longitudinal vibration mode of conventional ultrasonic processing devices, which causes excessive axial impact force, affects the surface processing effect of hard and brittle materials, and limits the materials used for tools question. In addition, the present invention can greatly reduce the vibration and high-frequency noise caused by the unstable air flow of the horn 40 under high-speed rotation through the filling material G filled in the groove 402, so as to improve the processing quality and Reduce the effect of environmental noise.

The above description is only a preferred feasible embodiment of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

[this invention] 1: Ultrasonic processing device 10: Arbor 20: Power transmission device 30:Piezoelectric driver 40,41,42: Horn 50: Knife 32: Piezoelectric film 401: Conical segment 402, 403, 404: grooves 401a: first paragraph 401b: second paragraph 60: collet R, R1, R2: force flow transmission path θ, θ1, θ2, θ3: Helix angle L: Length p: pitch b, b1, b2: slot width h, h1, h2: groove depth D: Maximum outer diameter d: Minimum outer diameter G: Filling material S1: Outer surface S2: outer wall F: Constraints

Fig. 1 is a perspective view of an ultrasonic processing device in a preferred embodiment of the present invention. Fig. 2 is a side view of the ultrasonic processing device of the above-mentioned preferred embodiment of the present invention. Fig. 3 is a sectional view taken along line 3-3 in Fig. 2 . Fig. 4 is a schematic diagram of the force flow transmission path of the above-mentioned preferred embodiment of the present invention. Fig. 5 is a side view of the ultrasonic processing device of the above-mentioned preferred embodiment of the present invention. Fig. 6 is a sectional view along line 6-6 of Fig. 2 . Fig. 7 is a schematic diagram of another preferred embodiment of the horn. Fig. 8 is a schematic diagram of another preferred embodiment of the horn.

1: Ultrasonic processing device

10: Arbor

20: Power transmission device

40 Horn

50: Knife

402: Groove

60: collet

Claims (17)

An ultrasonic processing device, comprising: a piezoelectric driver for receiving a signal to generate longitudinal ultrasonic vibration; a tool; It has a conical section, the outer wall of the conical section is provided with at least one groove, whereby the horn can convert the longitudinal ultrasonic vibration provided by the piezoelectric driver into longitudinal and torsional composite vibration and transmit it to the tool; a filling material , used to fill in the at least one groove; and a constraint member, disposed on the conical section, used to close the opening of the at least one groove. The ultrasonic processing device as described in Claim 1, wherein the at least one groove is plural in number, defining that the outer wall of the conical section has a plurality of force flow transmission paths, and these force flow transmission paths have the horn from The piezoelectric driver transmits vibration to the minimum distance of the tool, wherein the number of grooves located on each force flow transmission path is less than or equal to one. The ultrasonic processing device as described in Claim 2, wherein each of the grooves is a spiral groove, the helix angle of each of the spiral grooves is 30-100°, and the pitch is 3-200mm. The ultrasonic processing device as described in Claim 2, wherein the conical section has a maximum outer diameter D and a minimum outer diameter d at opposite ends respectively, and the groove width of each groove satisfies (D-d)/3~( D-d)/4 conditions. The ultrasonic processing device as described in Claim 2, wherein the groove width of each groove is 0.2mm~10mm. The ultrasonic processing device according to claim 2, wherein the groove depth of each groove is between 0.2 and 5 times the groove width of each groove. The ultrasonic processing device as described in Claim 2, wherein the groove depth of the grooves is 0.2mm~10mm. The ultrasonic processing device according to claim 2, wherein the grooves are respectively arranged at intervals in the circumferential direction of the conical section. The ultrasonic processing device according to claim 8, wherein the number of the grooves is four. The ultrasonic processing device as described in Claim 9, wherein L is defined as the length of each groove, p is the pitch of each groove, θ is the helix angle of each groove, and the length of each groove satisfies L =p(θ/360°) condition. The ultrasonic processing device as described in Claim 1, wherein the filling material includes epoxy resin (Epoxy), vinyl ester resin (vinyl ester resin), ultraviolet curing glue (UV glue), polyurethane (polyurethane) or Acrylic resin (acrylic resin) material. The ultrasonic processing device as claimed in claim 1, wherein the filling material filled in the at least one groove has an outer surface, and the outer surface is flush with the outer wall of the conical section. According to the ultrasonic processing device described in Claim 1, the filling material is a liquid material, and the filling material can be filled in the at least one groove and formed in the at least one groove. The ultrasonic processing device according to claim 1, wherein the conical section has an accommodating space inside, and the at least one groove runs through the conical section and communicates with the accommodating space. The ultrasonic processing device as claimed in claim 1, wherein the restraining member is made of composite material. The ultrasonic processing device according to claim 1, wherein the restraint is mainly made of carbon fiber. The ultrasonic processing device as claimed in claim 1, wherein the constraint is mainly made of non-magnetic material.

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