CN203197686U - Ultrasonic machining knife handle - Google Patents

Abstract

The utility model provides an ultrasonic machining handle, which includes a handle and a transducer, one end of the transducer is arranged inside the handle, an electromagnetic conversion device is arranged outside the handle, and the transducer It includes a horn, a piezoelectric ceramic, a pressure plate and a pre-tightening bolt, and the pre-tightening bolt connects the pressure plate, the piezoelectric ceramic, and the horn in sequence, and the horn and the tool handle pass through the end The cover is tightly connected. The ultrasonic machining tool holder proposed by the utility model can simultaneously perform high-speed rotation and axial vibration in two directions during machining, thereby improving machining efficiency, reducing cutting force and improving surface machining quality.

Description

A tool holder for ultrasonic machining

technical field

The utility model relates to the field of machining, in particular to an ultrasonic machining handle.

Background technique

Ultrasonic machining technology is one of the most suitable processing methods for processing hard and brittle materials. It removes the processed material on the workpiece by means of ultrasonic vibration on the basis of grinding. Ultrasonic machining can strengthen and improve the grinding effect. It not only retains the characteristics of grinding, but also can greatly improve the processing efficiency (processing efficiency can reach 3-5 times that of ordinary grinding), reduce the deformation of cutting, It reduces the cutting force and can effectively improve the surface processing quality of the workpiece.

The utility model adds an ultrasonic module on the basis of the existing knife handle structure, and applies inductive electric transmission to the ultrasonic knife handle structure, thereby proposing an induction type ultrasonic knife handle structure.

Utility model content

In view of the above problems, the purpose of this utility model is to provide an ultrasonic machining tool holder. When the ultrasonic machining tool holder is being machined, the tool holder simultaneously performs two directions of high-speed rotation and axial vibration, thereby improving the processing efficiency. , Reduce cutting force and improve surface processing quality.

The technical scheme of the utility model is achieved in that:

An ultrasonic machining tool handle, including a tool handle and a transducer, one end of the transducer is arranged inside the tool handle, and it is characterized in that: an electromagnetic conversion device is arranged on the outside of the tool handle, and the transducer includes Horn, piezoelectric ceramics, pressure plate and pre-tightening bolts, the pre-tightening bolts sequentially connect the pressure plate, the piezoelectric ceramics and the horn, the horn and the handle through the end cover Fasten the connection.

Preferably, the tool handle is connected to a numerical control machine tool, and the other end of the horn is connected to a tool head.

Preferably, the electromagnetic conversion device includes a transmitting coil and a receiving coil, the transmitting coil is connected to the driving device, and the receiving coil is connected to the electrodes of the transducer.

Preferably, the centers of the horn, the piezoelectric ceramics and the pressure plate are on a straight line.

Preferably, the length of the horn is 25-35 mm.

Preferably, the piezoelectric ceramic has a length of 10-20 mm.

Preferably, the length of the pressing plate is 15-25mm.

Further, the length of the horn is 31 mm, the length of the piezoelectric ceramic is 12 mm, and the length of the pressure plate is 21 mm.

Preferably, the length of the handle is 130-150 mm.

The beneficial effects produced by the utility model are: the ultrasonic machining tool holder proposed by the utility model can simultaneously perform high-speed rotation and axial vibration in two directions during machining, thereby improving processing efficiency, reducing cutting force and Improve surface finish quality.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of an ultrasonic machining handle of the present invention;

In the figure: 1 tool handle; 2 pressure plate; 3 transmitting coil; 4 receiving coil; 5 end cover; 6 horn; 7 pre-tightening bolt; 8 piezoelectric ceramics.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

According to the preferred embodiment shown in Figure 1, an ultrasonic machining handle includes a handle 1 and a transducer, one end of the transducer is arranged inside the handle 1, and the handle 1 is connected to a CNC machine tool , in this embodiment, the tool handle 1 is connected to the main shaft of the CNC machine tool, and an electromagnetic conversion device is arranged outside the tool handle 1, and the transducer includes a horn 6, a piezoelectric ceramic 8, a pressure plate 2 and a pre- Tighten the bolt 7, the pre-tightening bolt 7 sequentially connects the pressure plate 2, the piezoelectric ceramic 8 and the horn 6, the horn is connected with the tool head, the horn 6, the The centers of the piezoelectric ceramics 8 and the pressing plate 2 are on a straight line. The horn 6 is fastened to the knife handle 1 through the end cover 5 , and in this embodiment, the horn 6 is fastened to the end cover 5 through bolts.

The electromagnetic conversion device includes a transmitting coil 3 and a receiving coil 4, the transmitting coil 3 is connected with the driving device, and the receiving coil 4 is connected with the electrodes of the transducer. In this embodiment, both the transmitting coil 3 and the receiving coil 4 are arranged in a groove outside the handle. Eight small holes are evenly distributed above the transducer, and its function is to connect the wires of the receiving coil 4 to the transducer through the small holes, so that the receiving coil 4 is connected to the electrodes of the transducer.

The working process of the utility model is: when working, the CNC machine tool drives the tool handle 1 to rotate at a high speed; at the same time, the piezoelectric ceramic 8 is connected with the driving device through the electromagnetic conversion device, and then the electric signal of the driving device is first transmitted by using the principle of electromagnetic induction To the transmitting coil 3, the electrical signal of the transmitting coil 3 is transmitted to the receiving coil 4, and the receiving coil 4 is directly connected to the electrode of the transducer, so as to drive the transducer to generate ultrasonic vibration, so that the entire ultrasonic machining handle can rotate and vibrate at the same time Two kinds of movements are used for grinding, which greatly improves the processing efficiency and processing quality.

Regarding the selection of piezoelectric materials and horn materials, in order to reduce the impact of non-axial vibration and improve the efficiency of ultrasonic energy transmission, the piezoelectric material should be selected with a high-order thickness electromechanical coupling coefficient K ₁ and a low-order dielectric constant K ₃₃ ^T , a piezoceramic with a low-order radial electromechanical coupling coefficient K ₃₁ . The horn is made of stainless steel or titanium alloy with low energy dissipation.

The parameter design of the horn 6, the piezoelectric ceramic 8 and the pressure plate 2 satisfies the following formula:

${\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}\frac{{\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; the\; tan</span>}}^{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}^{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}^{\mathrm{<span\; class="notranslate">\; c</span>}}}\mathrm{<span\; class="notranslate">\; the\; tan</span>}{\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}{\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

${\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}\frac{{\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; the\; tan</span>}}^{<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}^{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}^{\mathrm{<span\; class="notranslate">\; c</span>}}}\mathrm{<span\; class="notranslate">\; the\; tan</span>}{\mathrm{<span\; class="notranslate">\; k</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}{\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

及

为超声波在变幅杆、压板及压电陶瓷的声阻抗。Among them, k _s is the wave number of the piezoelectric ceramic, k _b is the wave number of the horn, and k _f is the wave number of the pressure plate;

and

is the acoustic impedance of the ultrasonic wave in the horn, pressure plate and piezoelectric ceramics.

According to calculation, the length of the pressing plate 2 is 15-25 mm, the length of the piezoelectric ceramic 8 is 10-20 mm, and the length of the horn 6 is 25-35 mm. The pressing plate 2 in this embodiment The length is preferably 21 mm, and the length of the piezoelectric ceramic 8 is preferably 12 mm. The length of the horn 6 is preferably 31mm.

The ultrasonic machining tool holder proposed by the utility model can simultaneously perform high-speed rotation and axial vibration in two directions during work, which can improve processing efficiency, reduce cutting force and improve surface processing quality.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (9)

1. A kind of ultrasonic machining handle of a knife, comprise handle of a knife and transducer, described transducer one end is arranged on the inside of described handle of a knife, it is characterized in that: the outside of described handle of a knife is provided with electromagnetic conversion device, described transducer The device includes a horn, a piezoelectric ceramic, a pressure plate and a pre-tightening bolt, and the pre-tightening bolt sequentially connects the pressure plate, the piezoelectric ceramic and the horn, and the horn and the tool handle pass through The end caps are tightly connected. 2. The tool holder for ultrasonic machining according to claim 1, wherein the tool holder is connected to a numerically controlled machine tool, and the horn is connected to a tool head. 3. The ultrasonic processing tool holder according to claim 1, wherein the electromagnetic converting device comprises a transmitting coil and a receiving coil, the transmitting coil is connected with the driving device, and the receiving coil is connected with the transducer Electrode connection. 4 . The ultrasonic machining tool holder according to claim 1 , wherein the centers of the horn, the piezoelectric ceramic and the pressure plate are on a straight line. 5. The ultrasonic machining tool holder according to claim 1, characterized in that: the length of the horn is 25-35 mm. 6. The ultrasonic machining tool holder according to claim 1, characterized in that: the length of the piezoelectric ceramic is 10-20 mm. 7. The ultrasonic machining tool holder according to claim 1, characterized in that: the length of the pressing plate is 15-25 mm. 8. The ultrasonic machining tool holder according to claim 5, 6 or 7, wherein the length of the horn is 31 mm, the length of the piezoelectric ceramic is 12 mm, and the length of the pressure plate is 21 mm. 9. The tool handle for ultrasonic machining according to claim 1, characterized in that: the length of the tool handle is 130-150 mm.

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