JP2019181508A - Ultrasonic welding system cooling device - Google Patents

Abstract

To provide an ultrasonic welding system cooling device capable of cooling a converter, a booster, and a horn with a simple structure configuration.SOLUTION: An ultrasonic welding system cooling device 2 has a predetermined length and a predetermined cross-sectional area, and includes: a cylindrical body 4 capable of accommodating a part of a converter 3 and a booster 5; and a support body 5a provided in the booster 5 and provided radially with respect to a central axis O of the booster 5. One end surface of the cylindrical body 4 is fixed to the support body 5a in a state of accommodating a part of the converter 3 and the booster 5, the other end surface of the cylindrical body 4 communicates with a cooling air supply device 8, and through holes 6, 6, ... are perforated in an axial direction of the booster 5 in the support body 5a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cooling device for an ultrasonic welding system that welds an object to be welded by ultrasonic vibration, and relates to a cooling structure capable of cooling all of a converter, a booster, and a horn.

This type of ultrasonic welding system includes a converter that converts an ultrasonic electric signal into ultrasonic vibration, a booster that amplifies ultrasonic vibration from the converter, and a horn that applies ultrasonic vibration from the booster to the welding surface. It is known as a system with

  In this ultrasonic welding system, an object to be welded is placed between the welding working surface of the horn and the anvil, ultrasonic vibration from the converter is applied to the horn via the booster, and ultrasonic vibration is applied to the welding working surface. By welding, the object to be welded is welded.

  FIG. 6 is a diagram showing an outline of a conventional ultrasonic welding system cooling apparatus. In FIG. 6, the ultrasonic welding system 101 includes a converter 103 that converts an ultrasonic electric signal into ultrasonic vibration, a booster 105 that amplifies the ultrasonic vibration from the converter 103, and ultrasonic vibration from the booster 105. A horn 107 is provided to the welding surface 107a. Reference numeral 105a denotes a support.

  In the ultrasonic welding system 101, when used for a long time, the converter 103 is heated, and the booster 105 and the horn 107 are also heated. There was a problem.

For this reason, it is calculated | required to cool the heating part of each member, for example, the ultrasonic welding system cooling apparatus shown in FIG. 6 was provided as a conventional apparatus.
This conventional ultrasonic welding system cooling apparatus supplies cooling air to the converter 103 as shown by an arrow A1 in FIG. 6, and directs the air after cooling the converter 103 to a booster 105 as shown by an arrow A2. To dissipate.

   In addition, another conventional ultrasonic welding system cooling apparatus that solves the above-described problem is provided with a cooling medium flowing through the horn to cool the horn (Patent Document 1). By adopting such a configuration, the horn is cooled and the welding quality can be stabilized.

  Furthermore, in another conventional ultrasonic welding system cooling device that has solved the above problems, an electronic cooling member such as a Peltier element is fixed to the welding surface of the horn so that the welding surface can be cooled. (Patent Document 2). By having such a structure, the temperature of the welding operation surface of the horn can be kept constant, and the welding quality can be improved.

Japanese Patent No. 4429499 JP 2003-145282 A

  The conventional ultrasonic welding system cooling apparatus has a problem that although the converter 103 can be cooled, other boosters 105 and horns 107 cannot be cooled. In addition, in order to cool the other boosters 105 and horns 107, a cooling device for that purpose must be prepared separately, resulting in a complicated structure and an increase in the number of parts.

  In addition, the other conventional ultrasonic welding system cooling device shown in Patent Document 1 has a complicated structure such as a cooling medium flowing through the horn and a device for performing heat treatment of the cooling medium is necessary. There was a drawback that the number of parts was remarkably increased.

Furthermore, in another conventional ultrasonic welding system cooling device shown in Patent Document 2, an electronic cooling member must be fixed to the welding surface of the horn, and it is difficult to install depending on the structure of the welding surface of the horn. And the current flowing through the electronic cooling member must be controlled,
In addition to a significant increase in the number of parts, there are disadvantages in that special parts are required.

  An object of the present invention is to provide an ultrasonic welding system cooling apparatus that eliminates the above-mentioned drawbacks of the prior art and can cool a converter, a booster, and a horn with a simple structure.

In order to achieve the above object, an ultrasonic welding system cooling apparatus according to the present invention includes a converter that converts an ultrasonic electric signal into ultrasonic vibration, a booster that amplifies ultrasonic vibration from the converter, and a booster from the booster. An ultrasonic welding system including a horn for applying ultrasonic vibration to a welding surface,
A cylindrical body having a predetermined length and a predetermined cross-sectional area and capable of accommodating a part of the converter and the booster;
A support provided on the booster and provided radially with respect to the central axis of the booster;
One end surface of the cylindrical body is fixed to the support in a state in which a part of the converter and the booster is accommodated, and the other end surface of the cylindrical body is communicated with a cooling air supply device,
The support is provided with a through hole in the axial direction of the booster.

  The ultrasonic welding system cooling device according to claim 2 is the ultrasonic welding system cooling device according to claim 1, wherein the predetermined length of the cylindrical body accommodates all of the converter, and the converter and the booster as a part of the booster. It is more than the length which can accommodate from the connection part to the said support body of the said booster.

  The ultrasonic welding system cooling device according to claim 3 is the ultrasonic welding system cooling device according to claim 1, wherein the predetermined cross-sectional area of the cylindrical body is larger than a predetermined cross-sectional area of the converter or the booster, A space is formed between the cylindrical body and the inner peripheral surface.

   In the present invention, the entire converter and a part of the booster are accommodated in the cylinder, one end of the cylinder is fixed to the support of the booster, and a through hole is formed in the support of the booster. By adopting a structure that supplies cooling air from the end side, it is possible to reliably cool the three elements of the converter, booster, and horn with a simple structure, and to maintain good welding quality. There is an effect that the score can be remarkably reduced.

It is a front view which shows the ultrasonic welding system cooling device of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is the top view which showed the booster in the ultrasonic welding system cooling device of this invention partially notched. It is the characteristic view which described the cooling effect by the ultrasonic welding system cooling device of this invention with the cooling effect of the conventional ultrasonic welding system cooling device. It is a figure which shows the outline | summary of the conventional ultrasonic welding system cooling device.

  Hereinafter, an example of an embodiment of an ultrasonic welding system cooling device according to the present invention will be described with reference to the drawings.

  1 to 4 are views showing an ultrasonic welding system cooling apparatus according to the present invention. First, an outline of an example of an ultrasonic welding system will be described with reference to these drawings.

  In these drawings, a rotary ultrasonic welding system 1 includes a converter 3 that converts an ultrasonic electric signal into ultrasonic vibration, a booster 5 that amplifies ultrasonic vibration from the converter 3, and an ultrasonic wave from the booster 5. And a horn 7 for transmitting vibration to the welding surface 7a.

  The horn 7 includes a disk-shaped portion 7b, and the outer peripheral edge of the disk-shaped portion 7b serves as a welding surface 7a. An object to be welded is disposed between the welding surface 7a and a rotating anvil (not shown) to perform ultrasonic welding.

  Reference numeral 5a denotes a support, which is formed at the zero point position of the ultrasonic standing wave generated on the booster 5. Further, the support 5a is formed in a disk shape radially in a direction perpendicular to the central axis of the booster 5.

  Next, the ultrasonic welding system cooling device 2 will be described.

  The ultrasonic welding system cooling device 2 is roughly composed of a cylinder 4, through holes 6, 6,... Drilled in the support 5 a and a cooling air supply device 8.

In the ultrasonic welding system cooling apparatus 2, the cylindrical body 4 has a predetermined length and a predetermined cross-sectional area, and has a structure capable of accommodating the converter 3 and a part of the booster.

  The predetermined length La of the cylindrical body 4 is formed to be longer than the length capable of accommodating all of the converter 3 and from the connecting portion of the converter 3 and the booster 5 to the support body 5a of the booster 5. Is. That is, the length La of the cylindrical body 4 is longer than the length obtained by adding the length Lb of the converter 3 and the length Lc of the booster 5.

  The predetermined cross-sectional area Sa on the inner peripheral surface side of the cylindrical body 4 is larger than the cross-sectional area Sb of the outer diameter of the converter 3 or the booster 5, whichever is larger, by a certain amount or more. A space (gap D) is formed between the outer peripheral surface of 5 and the inner peripheral surface of the cylindrical body 4.

  Further, a screw hole 4a is formed on one end surface of the cylindrical body 4 so that it can be screwed. The other end surface of the cylindrical body 4 is closed, and a mounting hole provided in a part of the other end surface of the cylindrical body 4 communicates with the cooling air supply device 8.

  The booster 5 is provided with the support 5a as described above. The support 5a is formed with a circular wall surface with respect to the central axis O radially and perpendicularly to the central axis O of the booster 5.

  As shown in FIG. 4, through holes 6, 6,... Are formed in the wall of the support 5a in the direction of the central axis O of the booster 5 at a predetermined distance from the central axis O. Yes. Similarly, as shown in FIG. 4, the wall of the support 5 a has a screw hole 10 for fixing the cylindrical body 4 at a position outside the through holes 6, 6,. The booster 5 is drilled in the direction of the central axis O. The cylinder 4 is fixed to the wall of the support 5a by being screwed through the screw hole 10 and the screw hole 4a.

  As shown in FIGS. 1 and 2, one end surface of the cylindrical body 4 is fixed to the support body 5a in a state in which a part of the converter 3 and the booster 5 is accommodated, and the other end surface of the cylindrical body 4 is As shown in FIG. 2, the cooling air supply device 8 is communicated.

  Such an ultrasonic welding system cooling device 2 has a structure in which cooling air can be supplied to all of the converter 3, the booster 5 and the horn 7.

  According to such an ultrasonic welding system cooling device 2, it operates as follows. In FIG. 2, the cooling air is supplied from the cooling air supply device 8 to the other end surface side of the cylindrical body 4 as indicated by an arrow A <b> 1 in the figure.

  Then, the cooling air passes through the space between the inner peripheral surface of the cylindrical body 4 and the outer peripheral surface of the converter 3 or the booster 5 as shown by an arrow A2 in the figure, and the converter 3 and the booster 5 are Cooling.

 The cooled air flows from the through holes 6, 6,... Of the support 5a as shown by an arrow A3 in the figure to cool the horn 7 and the welding surface 7a.

  Thereby, the cooling air contacts all of the converter 3, the booster 5 and the horn 7, and the converter 3, the booster 5 and the horn 7 can be cooled.

  FIG. 5 is a characteristic diagram illustrating the cooling effect of the ultrasonic welding system cooling device of the present invention together with the cooling effect of the conventional ultrasonic welding system cooling device. In FIG. 5, the horizontal axis represents time [minute], and the vertical axis represents temperature change [° C.]. The asterisk indicates the temperature change due to the conventional apparatus, and the ◯ mark indicates the temperature change due to the ultrasonic welding system cooling apparatus according to the present invention.

  In the cooling of the conventional apparatus, the temperature rises with time, but the ultrasonic welding system cooling apparatus according to the present invention shows a temperature increase characteristic similar to that of the conventional apparatus for about 20 minutes, but after that the temperature decreases. It can be seen that the cooling effect is exhibited.

   In the ultrasonic welding system cooling apparatus 2 according to the present invention, the entire converter 3 and a part of the booster 5 are accommodated in the cylinder 4, one end of the cylinder 4 is fixed to the support body 5 a of the booster 5, and Since the through holes 6, 6,... Are formed in the support body 5a of the booster 5 so that the cooling air can be supplied from the other end side of the cylindrical body 4, all of the converter 3, the booster 5 and the horn 7 are provided. Can be cooled.

  In the ultrasonic welding system cooling apparatus 2 according to the present invention, the cylindrical body 4 is simply provided, the cylindrical body 4 is fixed to the support body 5a of the booster 5, and the through holes 6 and 6 are formed in the support body 5a. The converter, the booster and the horn can be cooled with a simple structure such as providing a cylindrical body 4, and the number of parts can be significantly reduced.

DESCRIPTION OF SYMBOLS 1 Rotary ultrasonic welding system 2 Ultrasonic welding system cooling device 3 Converter 4 Cylindrical body 5 Booster 6 Through-hole 7 Horn 7a Welding action surface

Claims (3)

An ultrasonic welding system comprising a converter that converts ultrasonic electric signals into ultrasonic vibration, a booster that amplifies ultrasonic vibration from the converter, and a horn that applies ultrasonic vibration from the booster to a welding surface. There,
A cylindrical body having a predetermined length and a predetermined cross-sectional area and capable of accommodating a part of the converter and the booster;
A support provided on the booster and provided radially with respect to the central axis of the booster;
One end surface of the cylindrical body is fixed to the support body in a state where a part of the converter and the booster is accommodated, and the other end surface of the cylindrical body is communicated with a cooling air supply device,
The ultrasonic welding system cooling device according to claim 1, wherein a through hole is formed in the support in the axial direction of the booster. The predetermined length of the cylindrical body is not less than a length that accommodates all of the converter and can accommodate a portion from the connecting portion of the converter and the booster to the support of the booster as a part of the booster. The ultrasonic welding system cooling device according to claim 1. The predetermined cross-sectional area of the cylindrical body is larger than a predetermined cross-sectional area of the converter or the booster, and a space is formed between the outer peripheral surface of the converter or the booster and the inner peripheral surface of the cylindrical body. The ultrasonic welding system cooling device according to claim 1.

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