KR102665938B1 - Ultra sonic spindle device of external power supply type - Google Patents

Abstract

The present invention relates to a built-in spindle. In particular, it is an ultrasonic spindle processing device with an external power supply that supplies the power required for the ultrasonic oscillator from the outside, enabling stable power supply and structural simplicity.

Description

Ultrasonic spindle processing device with external power supply {ULTRA SONIC SPINDLE DEVICE OF EXTERNAL POWER SUPPLY TYPE}

The present invention relates to a built-in spindle. In particular, it is an ultrasonic spindle processing device with an external power supply that supplies the power required for the ultrasonic oscillator from the outside, enabling stable power supply and structural simplicity.

In general, machine tools are equipped with a spindle to rotate the tool, and a built-in spindle refers to a machine that has a built-in means for generating rotational force to rotate the spindle.

As described above, this built-in type spindle has a built-in means for generating a rotational force, thereby reducing the overall volume, and the processing precision is also increased because the rotational force generating means directly rotates the spindle.

Meanwhile, recently, an ultrasonic processing method has been proposed in which the spindle is processed by exciting vibration using an ultrasonic excitation unit. According to this ultrasonic processing method, the processing time is reduced and the life of the tool is extended compared to the existing method.

However, in the case of the conventional ultrasonic processing method described above, since the ultrasonic excitation part rotates, a separate configuration is required to supply power to the fire body, so the configuration becomes complicated and stable power supply is difficult.

Meanwhile, the above-mentioned built-in spindle and ultrasonic spindle technologies themselves are widely known and are described in detail in the prior art literature below, so description and illustration thereof will be omitted.

Korean Registered Patent No. 10-1904799 Korea Registered Patent No. 10-2157402 Korea Registered Patent No. 10-2186473 Korean Public Utility Model No. 20-1999-003869 Korean Public Utility Model No. 20-2013-0005613

The present invention is intended to solve the above-described problem, and the external supply unit for power supply includes an external electrode disposed on the outside of the rotating ultrasonic excitation unit, and an internal electrode provided inside the ultrasonic excitation unit and in contact with the external electrode. The purpose is to provide an external power supply type ultrasonic spindle processing device that can provide stable power supply by supplying power while the internal electrode is in contact with the external electrode while rotating, and can also be easily configured for power supply. do.

However, the object of the present invention is not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the present invention includes a built-in spindle unit 200 having a processing tool (T) on one side, a hollow case 100 in which a part of the built-in spindle unit 200 is accommodated therein, and , an ultrasonic excitation unit (SO) provided on one side of the inside of the case 100, and an external supply unit 500 that supplies power to the ultrasonic excitation unit (SO), and the ultrasonic excitation unit (SO) is It rotates in conjunction with the spindle 210 of the built-in spindle unit 200 and has a piezoelectric element portion 600 to excite the processing tool (T), and the external supply portion 500 is connected to an external power source and the case 100 ) a first wire (W1) in contact with the ultrasonic excitation unit (SO) through the inside of the thickness surface, and an external electrode disposed on the outside of the ultrasonic excitation unit (SO) and provided at the end of the first wire (W1) (510), an internal electrode 520 provided inside the ultrasonic excitation unit (SO) and in contact with the external electrode 510, and a power supply to the piezoelectric element unit 600 in contact with the internal electrode 520. A spindle processing device with an external power supply method including a second wiring (W2) for supplying the spindle is provided.

In the above, the spindle 210 includes a first spindle 211 having a specific diameter, and a second spindle extending from the first spindle 211 in the direction of the processing tool T and provided with the ultrasonic excitation unit SO. It includes a spindle 212, the inner diameter of the second spindle 212 is formed to be larger than the inner diameter of the first spindle 211, the side in the direction of the processing tool T is open, and the ultrasonic excitation unit ( SO) is provided inside the second spindle 212, and the ultrasonic excitation unit (SO) is interlocked with the second spindle 212.

In the above, the ultrasonic excitation unit (SO) includes a piezoelectric element unit 600 that generates vibration by power supply, a horn 340 disposed on the side of the piezoelectric element unit 600 in the direction of the processing tool T, and , a base 320 disposed on the side of the piezoelectric element 600 in the opposite direction to the processing tool (T), and a fixture passing through the interior of the base 320, the piezoelectric element 600, and the horn 340 ( 350), and the horn 340 includes a plate-shaped horn base 341 in contact with the piezoelectric element portion 600, and a horn body extending from the horn base 341 in the direction of the processing tool T ( 342), and the horn base 341 and the horn body 342 have a hollow shape into which the fixture 350 is inserted.

In the above, the case 100 includes a hollow first housing 110 in which the first spindle 211 of the spindle 210 is accommodated, extends from the first housing 110, and the spindle ( The second spindle 212 of 210 includes a hollow second housing 120 accommodated therein and a cover 130 attached to the second housing 120, and the inside of the second housing 120 The diameter is formed to be larger than the inner diameter of the first housing 110, the side of the second housing 120 in the direction of the processing tool (T) is open, and the cover ( 130) is attached, a portion of the cover 130 is opened to expose a portion of the horn 340 of the ultrasonic excitation unit (SO), and a processing tool (T) is mounted on the exposed horn 340. , the wiring (W) enters through the inside of the thickness surface of the first housing 110 and the second housing 120, is exposed through the side of the second housing 120, and then is exposed to the ultrasonic excitation unit (SO). It enters the inside of the horn 340 through the horn body 342 and then penetrates the horn base 341 and is connected to the piezoelectric element unit 600.

In the above, the ultrasonic excitation unit (SO) includes a plate-shaped fixing plate 460, a horn 440 spaced a certain distance from the fixing plate 460 in the direction of the processing tool T, and processing at the fixing plate 460. It includes a base 420 spaced a certain distance in the direction opposite to the tool T, and generates vibration by power supply between the fixing plate 460 and the horn 440 and between the fixing plate 460 and the base 420. Piezoelectric element units 600 are respectively disposed, and fixtures 450 are inserted into the base 420, the piezoelectric element units 600, the fixing plate 460, and the horn 440.

In the above, the piezoelectric element portion 600 includes a longitudinal excitation portion 610, a horizontal excitation portion 620, and a height direction excitation portion 630 disposed adjacent to each other, and the longitudinal excitation portion 610 ) is a plate shape with an open center and is stacked in multiple layers to generate longitudinal vibration, and the horizontal excitation unit 620 includes a horizontal excitation unit body 621 in the shape of a plate with an open center, The horizontal excitation unit body 621 is stacked in multiple layers, and a cut portion 621-1 is formed in the horizontal direction excitation unit body 621 in the height direction, so that the horizontal excitation unit body 621 is formed in the horizontal direction. It is divided into a first body (621-3) and a second body (621-4), and power of opposite polarity is supplied to the first body (621-3) and the second body (621-4), respectively. Generates vibration in the horizontal direction, and the height direction exciting part 630 includes a height direction exciting part main body 631 in the shape of a plate with an open center, and the height direction exciting part main body 631 is stacked in multiple layers. , a cutout portion 631-1 is formed in the horizontal direction in the height direction exciting part body 631, so that the height direction exciting part main body 631 is divided into the first body 631-3 and the second body along the height direction. It is divided into (631-4), and power of opposite polarity is supplied to the first body (631-3) and the second body (631-4), respectively, to generate vibration in the height direction.

In the above, it includes a pair of bearing units 230 disposed between the case 100 and the spindle 220, and the bearing unit 230 is located between the first spindle 211 and the first housing 110. It includes a first bearing unit 231 disposed in and a second bearing unit 232 disposed between the second spindle 212 and the second housing 120, and the cover 130 is a plate-shaped cover. A main body 131, an opening 132 formed at the center of the cover main body 131 to expose a portion of the horn 340, and a ring on the side of the cover main body 131 in the direction toward the second housing 120. It includes a bearing pressing part 133 that protrudes in a shape to pressurize the second bearing unit 232, and the diameter D2 of the bearing pressing part 133 is smaller than the diameter D1 of the cover body 131. The outer end 131-1 of the cover body 131 protrudes a certain distance outside the bearing pressurizing portion 133, and the end of the second housing 120 protrudes outside the protruding cover body 131. It is in close contact with the stage (131-1).

In the above, the first housing 110 includes an 11th housing 111 in contact with the second housing 120, a 12th housing 112 in contact with the 11th housing 111 and having the same diameter, and It includes a 13th housing 113 that is in contact with the 12th housing 112 and has the same diameter, and a 14th housing 114 that covers the end side of the 13th housing 113, and the 13th housing 113 is It is arranged to surround the first bearing 231, and the fourteenth housing 114 has a hollow shape with one side open and covers an end side of the thirteenth housing 113.

In the above, a step 212b formed with a reduced thickness is provided on the inner side of the end of the second spindle 212 in the direction of the processing tool T, and the horn base 341 of the horn 340 is located on the step 212b. ) is fixed.

In the above, the second housing 120 includes a hollow second housing body 121 and a locking protrusion formed by reducing the thickness on the inner side of the second housing body 121 in the direction of the cover 130. (122), and a seating groove 212a is formed on the outer surface of the second spindle 212, so that the second bearing unit 232 is seated in the seating groove 212a, and the second bearing The unit 232 is disposed between the second housing body 121 and the second spindle 212, and one side of the second bearing unit 232 is pressed against the locking protrusion 122, and the second bearing unit The other side of (232) is pressed and fixed by the bearing pressing portion 133.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in this specification and claims should not be interpreted in their usual, dictionary meaning, and the inventor may appropriately define the concept of the term in order to explain his or her invention in the best way. It should be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

The present invention described above has the effect of enabling stable power supply and simplifying the structure.

1 is a schematic diagram of an ultrasonic spindle processing device according to an embodiment of the present invention;
Figure 2 is a schematic diagram showing the ultrasonic excitation unit and the spindle separated from the ultrasonic spindle processing device according to an embodiment of the present invention;
Figure 3 is a schematic diagram showing the coupling relationship between the ultrasonic excitation part and the second spindle in the ultrasonic spindle processing device according to an embodiment of the present invention;
Figure 4 is a perspective view and an enlarged view showing the piezoelectric element part of the ultrasonic spindle processing device according to another embodiment of the present invention;
Figure 5 is a schematic diagram showing the cover and bearing unit separated from the ultrasonic spindle processing device according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

In addition, the examples below do not limit the scope of the present invention, but are merely illustrative of the components presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and constitute the scope of the claims. Embodiments that include elements that can be replaced as equivalents may be included in the scope of the present invention.

The built-in ultrasonic spindle 10 according to an embodiment of the present invention includes a built-in spindle unit 200 on one side of which a processing tool T is provided, as shown in FIGS. 1 to 4, and the built-in spindle unit. A hollow case 100 in which a part of (200) is accommodated inside, an ultrasonic excitation unit (SO) provided on one side inside the case 100, and an external device that supplies power to the ultrasonic excitation unit (SO). Includes a supply unit 500. At this time, the ultrasonic excitation unit SO rotates in conjunction with the spindle 210 of the built-in spindle unit 200 and excites the processing tool T. That is, the ultrasonic excitation unit SO rotates by the spindle 210 and includes a piezoelectric element unit 600 to excite the processing tool T. With this configuration, the machining tool T rotates and vibrates to perform ultrasonic machining of the machining object.

As is widely known, the built-in spindle unit 200 includes a spindle 210 and a drive unit 220 that rotates the spindle 210. The driving unit 220 includes a rotor 222 provided on the spindle 210, and a stator 221 provided on the case 100 to rotate the rotor 222. Since the built-in spindle unit 200 itself is a widely known configuration, detailed description and illustration will be omitted.

Power is supplied to the piezoelectric element unit 600 by an external supply unit 500. This external supply unit 500 is connected to an external power source and has a first wire (W1) in contact with the ultrasonic excitation unit (SO) through the inside of the thickness surface of the case 100, and a first wire (W1) on the outside of the ultrasonic excitation unit (SO). An external electrode 510 disposed at the end of the first wire W1, an internal electrode 520 provided inside the ultrasonic excitation unit SO and in contact with the external electrode 510, and the internal electrode 520 provided at the end of the first wire W1. It includes a second wire W2 that is in contact with the electrode 520 and supplies power to the piezoelectric element unit 600. That is, the ultrasonic excitation unit SO is rotated in conjunction with the spindle 210 of the built-in spindle unit 200. In order to supply power to such a rotating object, it includes an internal electrode 520 provided in the ultrasonic excitation unit (SO) and an external electrode 510 that contacts the internal electrode 520 to supply power. With this configuration, power can be more conveniently supplied to a rotating target. Conventionally, wiring was used to supply power to a rotating object, but there was a problem in that the wiring became twisted due to the rotation of the object. The present invention solves this problem, and as described above, the rotating ultrasonic exciter (SO) is provided with an internal electrode 520, and the external electrode 510 is brought into contact with the internal electrode 520, making it more convenient. Power can be supplied easily. Meanwhile, the external electrode 510 may contact the internal electrode 520 while being supported by a support member (not shown). Additionally, the external electrode 510 is provided in a ring shape and can be in constant contact with the internal electrode 520.

The spindle 210 has a specific diameter and includes a hollow first spindle 211 on which the power generation unit 500 is provided on the outside, extending from the first spindle 211 in the direction of the processing tool T, and extending from the first spindle 211 toward the processing tool T. It includes a hollow second spindle 212 provided with an ultrasonic excitation unit (SO). That is, the first spindle 211 is placed on the right side of the drawing, and the second spindle 212 is placed on the left side of the drawing. The inner diameter d2 of the second spindle 212 is larger than the inner diameter d1 of the first spindle 211, and the side in the direction of the processing tool T is open, so that the ultrasonic excitation unit SO is provided inside the second spindle 212. At this time, the ultrasonic excitation unit (SO) is linked with the second spindle 212, which will be described separately.

With this configuration, the ultrasonic excitation unit (SO) rotates in conjunction with the rotation of the spindle and simultaneously generates vibrations in various directions in the ultrasonic excitation unit (SO), and transmits these vibrations to the processing tool (T) to processing takes place.

Meanwhile, the interior of the second spindle 212 and the interior of the first spindle 211 may be formed to communicate with each other.

Hereinafter, the ultrasonic excitation unit (SO) will be described. The ultrasonic excitation unit (SO) of the present invention includes the ultrasonic excitation unit (SO) shown in FIGS. 1 to 3 - hereinafter referred to as Example 1 - and the ultrasonic excitation unit 400 shown in FIG. 4 - hereinafter referred to as Example 2. Includes.

First, the ultrasonic excitation unit (SO) according to Example 1 will be described.

The ultrasonic excitation unit (SO) includes a piezoelectric element unit 600 that generates vibration by power supply, a horn 340 disposed on the side of the piezoelectric element unit 600 in the direction of the processing tool T, and the piezoelectric element unit 600. A base 320 disposed on the side of the element unit 600 in the opposite direction to the processing tool (T), and a fixture 350 passing through the base 320, the piezoelectric element unit 600, and the horn 340. Includes. That is, the horn 340 and the base 320 are arranged to be spaced apart in the left and right directions in the drawing. The piezoelectric element portion 600 is disposed between the horn 340 and the base 320. At this time, the fixture 350 penetrates the base 320 and the piezoelectric element portion 600 and is then fixed to the horn 340. The piezoelectric element unit 600 is fixed by this fixture 350.

The horn 340 includes a plate-shaped horn base 341 in contact with the piezoelectric element portion 600, and a horn body 342 extending from the horn base 341 in the direction of the processing tool T. In the illustrated embodiment, the horn base 341 is placed on the right side of the drawing and is in contact with the piezoelectric element portion 600, and the horn body 342 is placed on the left side of the drawing and a processing tool T is installed. Meanwhile, the horn base 341 and the horn body 342 have a hollow shape and are in communication with each other. At this time, the fixture 350 is inserted into the horn base 341 and then advances to the inside of the horn body 342 and is fixed.

The ultrasonic excitation unit SO is disposed inside the second spindle 212 as described above. In addition, a step 212b formed by reducing the thickness is provided at the end of the second spindle 212 in the direction of the processing tool T, that is, at the left end in the drawing. The horn base 341 is fixed to this step 212b. To this end, the step 212b and the horn base 341 may be fixed by a joining method such as welding, or the step 212b and the horn base 341 may be detachably fixed by a bolt or the like. With this configuration, the horn base 341 rotates in conjunction with the rotation of the second spindle 212. Additionally, the horn body 342 is rotated by the rotation of the horn base 341, and the processing tool T coupled to the horn body 342 is also rotated. Meanwhile, a coupling portion 343 is provided at the end of the horn body 342 so that the processing tool (T) can be easily mounted.

As described above, the horn base 341 is fixed to the step 212b at the end of the second spindle 212, and the piezoelectric element portion 600 and fixture 350 in contact with the horn base 341 are connected to the second spindle 212. It is placed inside (212).

The first spindle 211 and the second spindle 212 are disposed inside the case 100. This case 100 includes a hollow first housing 110 in which the first spindle 211 is accommodated, a second spindle 212 extending from the first housing 110, and a second spindle 212 of the spindle 210. ) includes a hollow second housing 120 accommodated therein. At this time, the inner diameter of the second housing 120 is formed to be larger than the inner diameter of the first housing 110. That is, the inner diameter of the second housing 120 is formed to be larger than the inner diameter of the first housing 110, and the second spindle 212 is disposed inside the second housing 120. Additionally, a first spindle 211 is disposed inside the first housing 110. At this time, the side of the second housing 130 in the direction of the processing tool T is open, and the cover 130 is attached to the open side of the second housing 120. An opening 131 is formed in one part of the cover 130 to expose a portion of the horn 340 of the ultrasonic excitation unit SO, and a processing tool T is mounted on the exposed horn 340. . That is, the horn body 342 of the horn 340 is exposed through the opening 131 of the cover 130, and a processing tool T is mounted on the horn body 342. Meanwhile, a bearing support portion 132 protrudes from the cover 130. A bearing 230 is provided between the second housing 120 and the second spindle 212. The bearing support portion 132 protrudes in the direction of the bearing 230 to press the bearing 230.

Meanwhile, the bearing units 230 are arranged as a pair between the case 100 and the spindle 220. That is, the bearing unit 230 is located between the first bearing unit 231 disposed between the first spindle 211 and the first housing 110, and the second spindle 212 and the second housing 120. It includes a second bearing unit 232 that is disposed. Accordingly, the first bearing unit 231 rotatably supports the first spindle 211, and the second bearing unit 232 rotatably supports the second spindle 212.

As described above, the cover 130 includes a plate-shaped cover body 131, an opening 132 formed at the center of the cover body 131 to expose a portion of the horn 340, and the cover body 131. Among them (131), it includes a bearing pressing part 133 that protrudes in a ring shape from the side in the direction of the second housing 120 and presses the second bearing unit 232.

The diameter D2 of the bearing pressing portion 133 is smaller than the diameter D1 of the cover body 131, so that the outer end 131-1 of the cover body 131 is outside the bearing pressing portion 133. It protrudes a certain distance, and the end of the second housing 120 is in close contact with the outer end 131-1 of the protruding cover body 131. Meanwhile, the end of the second housing 120 can be coupled with a bolt or other structure, and with this structure, the bearing pressurizing portion 133 is stably provided.

The first housing 110 may be divided into multiple pieces, and as shown, an 11th housing 111 in contact with the second housing 120 and an 11th housing 111 in contact with the 11th housing 111 and having the same diameter. It includes a 12th housing 112, a 13th housing 113 that is in contact with the 12th housing 112 and has the same diameter, and a 14th housing 114 that covers the end side of the 13th housing 113.

At this time, the thirteenth housing 113 may be arranged to surround the first bearing 231.

The 11th to 13th housings 111 to 113 have an empty interior and an open shape on both sides. This 13th housing 113 is closed by the 14th housing 114. To this end, the fourteenth housing 114 may be hollow and have one side open so as to cover the end side of the thirteenth housing 113.

Meanwhile, as shown in FIG. 5, the second housing 120 includes a hollow second housing body 121 and a thickness on the inner side of the second housing body 121 in the direction toward the cover 130. It includes a locking protrusion 122 that is formed by decreasing. Additionally, a seating groove 212a is formed on the outer surface of the second spindle 212, and the second bearing unit 232 is seated in the seating groove 212a. At this time, the second bearing unit 232 is disposed between the second housing body 121 and the second spindle 212, and one side of the second bearing unit 232 is pressed against the locking protrusion 122. , the other side of the second bearing unit 232 can be pressurized by the bearing pressing part 133 and stably fixed.

Hereinafter, the ultrasonic excitation unit 400 according to Example 2 will be described with reference to FIG. 4.

The ultrasonic excitation unit 400 includes a plate-shaped fixing plate 460, a horn 440 spaced a certain distance away from the fixing plate 460 in the direction of the processing tool (T), and a processing tool (T) on the fixing plate 460. ) It includes a base 420 spaced a certain distance in the opposite direction. A piezoelectric element unit 600 that generates vibration by supplying power is disposed between the fixing plate 460 and the horn 440 and between the fixing plate 460 and the base 420.

That is, in the case of Embodiment 1, the piezoelectric element unit 600 is disposed between the horn babe 341 and the base 320, and in the case of Embodiment 2, the piezoelectric element unit 600 is located on the left side with respect to the fixing plate 460. It is disposed between the horn 440 and the fixing plate 460 and between the fixing plate 460 and the base 420, respectively.

In addition, a fixture 450 is inserted into the base 420, the piezoelectric element portion 600, the fixing plate 460, and the horn 440 to thereby secure them as a whole.

At this time, the piezoelectric element portion 600 includes a longitudinal excitation portion 610, a horizontal excitation portion 620, and a height direction excitation portion 630 disposed adjacent to each other.

The longitudinal vibrating part 610 has a plate shape with an open center and is stacked in multiple layers so that the horn 440 vibrates in the longitudinal direction (y-direction). At this time, as shown in FIG. 4, power of opposite polarity may be supplied, for example, power of + polarity is supplied to the longitudinal excitation unit 621 on the right side of the drawing, and power of + polarity is supplied to the longitudinal excitation unit 621 on the left side of the drawing. Power of the = polarity is supplied to (622), so that the side to which the power of the + polarity is supplied expands, thereby controlling the magnitude of the vibration.

The horizontal excitation unit 620 includes a horizontal excitation unit body 621 in the shape of a plate with an open center, and the horizontal excitation unit body 621 is stacked in multiple layers. In Figure 4, the horizontal direction excitation unit body 621 is shown as a two-layer stack. A cutout portion 621-1 is formed in the horizontal direction vibrating portion main body 621 in the height direction. The horizontal excitation unit body 621 is divided into a first body 621-3 and a second body 621-4 along the horizontal direction by the cut portion 621-1. Power of opposite polarity is supplied to the first body 621-3 and the second body 621-4, respectively. For example, + polarity power is supplied to the first body 621-3 to expand it. When the first body 621-3 expands, the horn 440 vibrates while deforming to the right in the horizontal direction (z direction) in the drawing. Conversely, when + polarity power is supplied to the second body 621-4, the horn 440 deforms and vibrates in the opposite direction. In addition, the horizontal excitation unit body 621 is stacked in two layers, and the amplitude of deformation in the horizontal direction can be adjusted by supplying power of the same polarity or power of opposite polarity to the sides that come into contact with each other.

The height direction exciting part 630 includes a height direction exciting part main body 631 in the shape of a plate with an open center. The height direction exciting part body 631 is stacked in multiple layers, and a cutout portion 631-1 is formed in the height direction exciting part body 631 in the horizontal direction, so that the height direction exciting part main body 631 is formed in the height direction. It is divided into a first body (631-3) and a second body (631-4). Power of opposite polarity may be supplied to the first body 331-3 and the second body 331-4, respectively. For example, when + polarity power is supplied to the first body 331-3 and the first body 331-3 expands, the horn 440 may be deformed and vibrated in the lower direction in the height direction in the drawing. Conversely, when + polarity power is supplied to the second body 331-4, the second body 331-4 expands and the horn 440 may deform and vibrate in the upward direction.

In addition, the height direction excitation portion 630 is stacked in multiple layers, and the amplitude of deformation in the height direction can be adjusted by supplying power of the same polarity or power of opposite polarity to the sides that come into contact with each other.

Although the present invention has been described in detail through specific examples, this is for the purpose of explaining the present invention in detail, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: Case 110: First housing
120: second housing 130: cover
200: Built-in spindle unit 210: Spindle
220: Drive unit SO: Ultrasonic excitation unit
320: Base 340: Horn
350: fixture 400: ultrasonic excitation unit
420: Base 440: Horn
450: fixture 460: fixture plate
500: external supply unit 510: external electrode
520: Internal electrode 600: Piezoelectric element part
610: longitudinal excitation part 620: horizontal direction excitation part
630: Height direction excitation part

Claims (2)

A built-in spindle unit 200 equipped with a processing tool (T) on one side, a hollow case 100 in which a part of the built-in spindle unit 200 is accommodated therein, and a built-in spindle unit 200 on one side of the inside of the case 100. It includes an ultrasonic excitation unit (SO) and an external supply unit 500 that supplies power to the ultrasonic excitation unit (SO),
The ultrasonic excitation unit (SO) rotates in conjunction with the spindle 210 of the built-in spindle unit 200 and is provided with a piezoelectric element unit 600 to excite the processing tool (T),
The external supply unit 500 is connected to an external power source and includes a first wire (W1) that contacts the ultrasonic excitation unit (SO) through the inside of the thickness surface of the case 100, and a first wire (W1) on the outside of the ultrasonic excitation unit (SO). An external electrode 510 disposed at the end of the first wire W1, an internal electrode 520 provided inside the ultrasonic excitation unit SO and in contact with the external electrode 510, and the internal electrode 520 provided at the end of the first wire W1. It includes a second wire (W2) in contact with the electrode 520 and supplying power to the piezoelectric element unit 600,
The case 100 includes a hollow first housing 110 in which the first spindle 211 of the spindle 210 is accommodated, extends from the first housing 110, and has a hollow first housing 110 in which the first spindle 211 of the spindle 210 is accommodated. It includes a hollow second housing 120 in which the second spindle 212 is accommodated, and a cover 130 attached to the second housing 120,
The side of the second housing 120 in the direction of the processing tool (T) is open, and the cover 130 is attached to the open side of the second housing 120,
A portion of the cover 130 is opened to expose a portion of the horn 340 of the ultrasonic excitation unit SO, and a processing tool T is mounted on the exposed horn 340,
The ultrasonic excitation unit (SO) includes a plate-shaped horn base 341 in contact with the piezoelectric element unit 600, and a horn body 342 extending from the horn base 341 in the direction of the processing tool (T). In this case, the horn base 341 is placed on the right side and is in contact with the piezoelectric element portion 600, and the horn body 342 is placed on the left side and a processing tool (T) is installed, and the horn base 341 and The horn body 342 has a hollow shape and the interior is in communication with each other, and the fixture 350 is inserted into the horn base 341 and then advanced to the inside of the horn body 342 and fixed therein.
The piezoelectric element portion 600 includes a longitudinal excitation portion 610, a horizontal excitation portion 620, and a height direction excitation portion 630 disposed adjacent to each other,
The longitudinal vibrating part 610 has a plate shape with an open center and is stacked in multiple layers to generate longitudinal vibration,
The horizontal excitation unit 620 includes a horizontal excitation unit body 621 in the shape of a plate with an open center, wherein the horizontal excitation unit body 621 is stacked in multiple layers, and the horizontal excitation unit body ( In 621, a cutout portion 621-1 is formed in the height direction, and the horizontal excitation portion main body 621 is divided into a first main body 621-3 and a second main body 621-4 along the horizontal direction. , power of opposite polarity is supplied to the first body (621-3) and the second body (621-4), respectively, to generate vibration in the horizontal direction,
The height direction exciting part 630 includes a height direction exciting part main body 631 in the shape of a plate with an open center, wherein the height direction exciting part main body 631 is stacked in multiple layers, and the height direction exciting part main body ( In 631), a cutout portion 631-1 is formed in the horizontal direction, so that the height direction exciting part body 631 is divided into a first body 631-3 and a second body 631-4 along the height direction. , power of opposite polarity is supplied to the first body (631-3) and the second body (631-4), respectively, to generate vibration in the height direction.
It includes a pair of bearing units 230 disposed between the case 100 and the spindle 220,
The bearing unit 230 is a first bearing unit 231 disposed between the first spindle 211 and the first housing 110, and a second spindle 212 and the second housing 120. Includes a second bearing unit 232,
The cover 130 includes a plate-shaped cover body 131, an opening 132 formed at the center of the cover body 131 to expose a portion of the horn 340, and a portion of the cover body 131. It includes a bearing pressing part 133 that protrudes in a ring shape from the side in the direction of the second housing 120 and presses the second bearing unit 232,
The first housing 110 includes an 11th housing 111 in contact with the second housing 120, a 12th housing 112 in contact with the 11th housing 111 and having the same diameter, and the 12th housing It includes a 13th housing 113 that is in contact with (112) and has the same diameter, and a 14th housing 114 that covers an end side of the 13th housing 113, and the 13th housing 113 is the first housing 113. It is arranged to surround the bearing unit 231, and the fourteenth housing 114 is hollow and has one side open to cover the end side of the thirteenth housing 113.
A step 212b formed with a reduced thickness is provided on the inner side of the end in the direction of the processing tool T of the second spindle 212, and the horn base 341 of the horn 340 is fixed to the step 212b. become
The second housing 120 includes a hollow second housing body 121, and a locking protrusion 122 formed by reducing the thickness on the inner side of the second housing body 121 in the direction of the cover 130. It includes a seating groove 212a formed on the outer surface of the second spindle 212, and the second bearing unit 232 is seated in the seating groove 212a, and the second bearing unit 232 ) is disposed between the second housing body 121 and the second spindle 212, and one side of the second bearing unit 232 is pressed against the stopping protrusion 122, and the second bearing unit 232 A spindle processing device with an external power supply, characterized in that the other side of the is pressurized and fixed by the bearing pressurizing portion 133. According to paragraph 1,
The spindle 210 includes a first spindle 211 having a specific diameter, and a second spindle 212 extending from the first spindle 211 in the direction of the processing tool T and provided with the ultrasonic excitation unit SO. ), including
The inner diameter d2 of the second spindle 212 is larger than the inner diameter d1 of the first spindle 211, and the side in the direction of the processing tool T is open, so that the ultrasonic excitation unit SO is provided inside the second spindle (212), and the ultrasonic excitation unit (SO) is an external power supply type spindle processing device that is interlocked with the second spindle (212).