KR100650026B1 - Ultrasonic sewing machine - Google Patents

Abstract

An ultrasonic bonding machine having an ultrasonic tool horn, which simultaneously bonds and transfers materials to be bonded, can cut the materials to be bonded in addition to bonding, and linearly bonds bonding surfaces of the materials to be bonded to improve bonding quality, is provided. An ultrasonic bonding machine comprises: a servo motor fixed to a base frame(12); a tool horn assembly comprising an oscillator(21) for generating supersonic waves by a power source, a booster(23) connected to the oscillator, and a disc type tool horn connected to the booster; a shaft(21b) connected to supporting members(13a-13c) having bearings installed on the base frame such that the shaft can be rotated by the servo motor; a housing(25) which is rotatably connected to the bearings in the state that the housing is axially supported by the bearings, and covers the periphery of the oscillator and the booster; and a transfer part comprising a roller that is interlocked with the shaft, rotated through a power transmission means, and rotatably contacted with an outer surface of the tool horn.

Description

Ultrasonic Joining Machine {Ultrasonic Sewing machine}

1 is a longitudinal sectional view illustrating an ultrasonic bonding apparatus employing a tool horn assembly according to the present invention;

Figure 2 is a side cross-sectional view illustrating an ultrasonic bonding apparatus employing a tool horn assembly according to the present invention,

3 is a sectional view of the main parts illustrating the configuration of the ultrasonic vibrator and the tool horn according to the present invention;

Figure 4a is an exploded perspective view showing the excerpt of the configuration of the oscillator and tool horn of the ultrasonic welding apparatus according to the present invention,

Figure 4b is a perspective view and enlarged cross-sectional view showing an enlarged preferred embodiment of the tool horn according to the present invention;

4c is a cross-sectional view of the main portion illustrating another embodiment of the tool horn according to the present invention;

Figure 5a is a longitudinal sectional view from the front of the transfer unit for transferring the object to be joined in conjunction with the disk-shaped tool horn according to the present invention

Figure 5b is a side view of the conveying part shown in Figure 5a,

6 is a waveform diagram illustrating vibration pulses of an oscillator according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: ultrasonic bonding device 11: worktable

12: expectation 13a, 13b, 13c: support member

15: Coupler

16: pulley 20: ultrasonic and vibration generator

21: Oscillator 21a, 23a: Screw

21b: shaft 22: disc type tool horn

22a: flange 22b: diamond coating layer

23: booster 23a: groove

24: vibrator housing 25a: support protrusion

25: Auxiliary housing 30: Transfer section

31: roller 31a: figure

40: servo motor 41: power transmission means

t1: width of roller t2: width of flange

The present invention relates to an ultrasonic bonding apparatus for joining overlapping joined objects to each other by ultrasonic vibration of a transverse wave having a predetermined frequency, and more particularly, to transfer the joined objects simultaneously with the joining, The present invention relates to an ultrasonic bonding apparatus having an ultrasonic tool horn that can be cut and can improve the bonding quality by linearly bonding the bonding surface of the joined object.

Ultrasonic bonding device, for example, when manufacturing work clothes for protection work, nuclear power generation, waterproof clothes such as dustproof work clothes, mountaineering clothes (waterproof and winter clothes), or tents or tents, there is a problem that rain water leaks between sewing lines when sewing fabrics. It is most widely used for non-fusion bonding of two fabrics.

Ultrasonic bonding device is a bonding device using ultrasonic vibrator and tool horn. The vibrator is a piezoelectric element or magnetostrictive element that converts electrical energy into mechanical energy by outputting ultrasonic energy with a predetermined frequency from the ultrasonic generator. Electroacoustic transducers or vibratory transducers, etc .; At the output end of the vibrator, a bar-shaped vibrator is mechanically coupled coaxially.

The electrical energy is supplied to the vibrator as described above to generate ultrasonic vibration in the vibrator, and the ultra-fine ultrasonic waves generated by the vibrator generate the tool horn (converted to vibration energy) under the pressurized state by the tool horn and roller. ) And vibrate at the overlapped portion of the part to be joined (meaning partial melting rather than complete dissolution).

The work table of the conventional ultrasonic bonding apparatus as described above is provided with a tool horn above and below, and a pressing member is installed above the tool horn so as to be movable up and down. When the object to be joined is placed between the tool horn and the pressing member and power is applied, as described above, vibration energy is generated in the tool horn, resulting in costly overlapping portions of the parts to be joined.

In this way, the injured material to be joined is transported by a worker by hand and joined. At this time, the tool horn is installed vertically on the lower side of the workbench, and its upper end is formed in a plate shape. The pressurizing member for pressurizing the object to be joined at the top of the tool horn is an idle roller, and the operator pushes the object to the hand by hand to continuously join the work.

However, in the conventional ultrasonic bonding apparatus, the overlapped workpiece is placed on a plate-shaped tool horn at the bottom, so that the contact surface of the workpiece is wide so that the heat generated from the tool horn and the roller during operation are stopped when the operation is stopped and restarted. Due to maintaining the pressurized state, heat is conducted to the surroundings of the joined object to generate a molten state, which causes a kind of spreading phenomenon. When the spreading occurs, not only the thickness of the part is thinned, but also the traces are partially left on the continuously long joining line, so that the joining line is uneven or causes a problem.

In addition, the joining operation of the joined object requires that the worker transfers the adhered object by hand, so when the unskilled person works, the joining line is crooked, the thickness is not uniform, and the joining part (hole) is relatively weak. Because of this, there is a problem that rain water leaks between the joints there, or the joints easily burst when making the waterproof work clothes.

In addition, it is necessary to transfer the member to be joined in consideration of the cost point in the joining operation, but if the time is delayed, the fabric will melt and leave a trace of melting, and thus, the expert joining know-how is required for high quality joining.

The present invention has been made in order to solve the above problems, the main object of the present invention can be used as a cutting machine of the fabric model as well as inexpensive adhesion of the object to be bonded, and also the tool horn and roller during the joining processing of the object to be bonded The present invention provides an ultrasonic bonding apparatus having a tool horn assembly pressurized by a line contact method.

The present invention provides an ultrasonic bonding apparatus having an assembly of a tool horn having a cutting function by forming a tool horn according to the present invention so that the tool horn can be joined while rotating and having an end portion in contact with the distal end of the joined object.

According to the present invention, in the ultrasonic bonding apparatus 10 in which two parts to be joined overlap each other at an ultrasonic cost, the vibrator 21 generating ultrasonic waves by a power source and the booster 23 connected to the vibrator 21 are provided. And a disk-shaped tool horn 22 coupled to the booster 23, and a support member 13a provided with a bearing installed on the base 12 so as to rotate by receiving power from the servo motor 40. A housing (25) coupled to the shaft (21b) coupled to the bearing and rotatably coupled to the bearing, and covering the circumference of the vibrator (21) and the booster (23); It is achieved by a conveying part 30 having a roller 31 coupled to interlock with the shaft 21b and rotated through the power transmission means 41 to be in contact with the outer surface of the tool horn 22 and rotated. Can be.

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According to the present invention, the tool horn is formed into a disk shape and assembled to rotate so that the object to be joined can be joined and transported at a low cost, and the contact portion between the disk-shaped tool horn and the roller contacting the surface of the object to be joined is linearly contacted. The joining line can be bonded to the surface of the joint with a uniform and uniform thickness, which greatly reduces the ease of operation and the defective rate even for the unskilled person.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the ultrasonic bonding apparatus according to the present invention will be described in detail.

Referring to Figure 1, Figure 1 is a longitudinal sectional view showing the overall configuration of the ultrasonic bonding apparatus employing the tool horn assembly according to the present invention, Figure 2 is a side cross-sectional view of the ultrasonic bonding device shown in FIG. It is.

In the drawings, reference numeral 10 denotes an entire ultrasonic welding apparatus, 20 is a vibration generating unit for joining overlapped workpieces (not shown), and 30 is located on the upper side of the tool horn to press the upper surface of the workpiece under pressure. It is a conveying unit for conveying the joint.

The ultrasonic bonding apparatus 10 is provided with a vibration generating unit 20 on the lower side of the work table 11, the object to be transferred 30 is installed on the upper side, the working table, that is, the vibration generating unit 20 and The object to be joined is placed between the object to be transferred 30.

Referring to FIG. 3, FIG. 3 is a cross-sectional view illustrating main parts of the ultrasonic tool horn and the vibration generating unit according to the present invention. As shown in FIG. 3, the vibration generator 20 includes a vibrator 21 having a disk-shaped tool horn 22 and a servo motor 40 for rotating them.

4A and 4B, an exploded perspective view of main parts of a vibration generating unit and a tool horn of an ultrasonic bonding apparatus according to the present invention is shown in FIG. 4A, and FIG. 4B is a preferred embodiment of the tool horn according to the present invention. have,

The tool horn 22 is fastened to the booster 23 by a screw 23a as shown in FIGS. 4A and 4B, and the booster 23 is assembled by the vibrator 21 and the screw 21a, Outside it is located in the housing 24 and the auxiliary housing 25.

The housing 24 is coupled to the auxiliary housing 25 and is supported by the bearing provided in each of the supporting members 13a, 13b and 13c fixed on the base 12. On one side, a shaft 21b extending in the axial direction is provided and connected to the servo motor 40.

The servo motor 40 is a timing motor that is rotated by a power source having an excitation coil and an electrode therein, and the power generated by the servo motor 40 is a shaft of the vibrator 21 coupled to the coupler 15 ( It is transmitted to the power transmission means 41 via 21b) to rotate the transfer part 30 and the tool horn 22.

The vibrator 21 is supplied with power by introducing a power cable at an inner speed of the shaft 21b. The vibrator 21 is assembled to the support members 13a, 13b, and 13c using the housing 24 and the auxiliary housing 25 so that the vibrator 21, the tool horn 22, and the booster 23 are rotated. .

The auxiliary housing 25 is provided around the booster 23, and the support protrusion 25a inserted in the groove part 23a of the booster 23 is provided in the inner surface. The support protrusion 25a does not eccentrically rotate during the rotation of the booster 23 because the resonance phenomenon occurs in the axial direction when the ultrasonic wave generated from the vibrator 21 is transmitted to the tool horn 22. In other words, it should be rotated in a circle.

That is, when power is applied, the vibrator 21 is rotated by the servo motor 40 and vibrates about 35,000 Hz / sec, so that the ultrasonic wave 23 is transmitted to the tool horn 22. Since the vibrator 21 has a predetermined range of pulses within a predetermined frequency range as shown in FIG. 6, the groove 23a is formed on the circumferential surface of the booster 23 corresponding to the point V at which the pulse is "0". Install and set the support point (V) so that the support projection (25a) is coupled to the groove portion (23a). At this time, it is preferable to minimize the width of the end of the support protrusion 25a to be inserted into the groove portion 23a. This is to minimize the influence of the vibration width, that is, the pulse acting in the longitudinal direction of the booster 23 as the width of the contact surface becomes larger.

In addition, a coupler 15 and a pulley 16 are mounted at the free end of the vibrator 21, and the pulley 16 is transferred through the power transmission means 41 so as to be interlocked with the transfer object 30 to be described later. Provide a power source to drive 30. This will be described in more detail below.

The tool horn 22 described above is gradually narrowed radially outward, and the outermost circumferential surface is provided with a flange 22a extending in a predetermined width in the axial direction, and its surface as shown in Fig. 4B. As can be seen in cemented carbide tools, cutting tools, abrasive tools, etc., a coating layer coated with diamond 22b is formed. The diamond coating layer 22b enhances the abrasion resistance and durability of the tool horn 22 to prevent scratches and dents from occurring from external shocks applied to the flange 22a, thereby improving durability and conveying the fabric without slipping. To improve the adhesion of the workpiece.

5A and 5B, FIG. 5A illustrates a longitudinal cross-sectional view of the feeder 30 for feeding the object to be joined in cooperation with the disk-shaped tool horn according to the present invention, and FIG. 5B. A side view of the conveying part 30 shown in 5a is shown.

As shown in Figs. 3 to 5b, the transfer portion 30 of the joined object is provided with a corresponding pulley connected to the pulley 16 provided at the end of the shaft 21b which is rotated by the servo motor 40 described above. It is transmitted to the roller 31 located at the top of the tool horn 22 through the driven shaft (constituting the power transmission means 41) to rotate with the pulley. Reference numerals 32, 33, and 34 are pulleys and timing belts through which power transmitted by the power transmission means 41 is transmitted to the roller 31.

Thus, the roller 31 is rotated together when the tool horn 22 rotates to transfer the joined object in a pressurized state. At this time, since the surface of the roller 31 is in contact with the object to be joined, it is possible to imprint or engrav a letter, logo, character or figure 31a, etc. on the circumferential surface of the roller 31 so that the desired shape can be taken on the adhesive surface due to inexpensiveness. have. Of course, the same effect can be expected even if the desired shape is embossed or engraved on the circumferential surface of the tool horn 22. It is preferable that the width t1 of the roller 31 and the width t2 of the flange 22a are configured to be the same. If the width t1 of the roller 31 is larger than one of the width t2 of the flange 22a, the repulsive force due to the pressurization of the flange 22a of the tool horn 22 or the roller 31 is increased. Since the inherent part is to be joined, there is a possibility that the joined part is cut by each corner portion.

In view of this, the width t2 of the flange 22a is narrower than the width t1 of the roller 31 as shown in FIG. 4C in the flange 22a portion of the tool horn 22. When formed, the tool horn 22 can be expected as a cutting effect can also be used as an ultrasonic cutting machine.

The operation according to the present invention configured as described above will be described.

First, the overlapped workpiece (fabric) between the roller 31 and the tool horn 22 is aligned, and the main power switch (not shown) is switched on, and the vibrator 21 and the servomotor 40 are turned on. The power is applied to and rotates together with the shaft 21b of the vibrator 21 as described above, while generating the ultrafine ultrasonic waves from the vibrator 21, while the booster 23 and the tool horn are rotated at the same time, they are joined by microscopic ultrasonic waves. Cost of absence.

At this time, the contact surface of the roller 31 for pressing the upper object to be joined and the flange 22a of the tool horn 22 contacting the surface of the lower object to be joined are in line contact with each other so that the contact surface of the object to be joined is linear. It comes in contact.

Therefore, as in the conventional ultrasonic welding apparatus, problems occurring in surface contact, that is, problems such as leakage or uneven thickness of the joining line of the joining line are minimized or rarely generated.

In addition, since the roller 31 is rotated together with the rotation of the tool horn 22, the to-be-joined material is joined and transported to the rear, so that the thickness of the joint is not only uniform but is also conveyed at a constant speed. It shows the bonding ability.

As described above, unlike the conventional ultrasonic bonding apparatus, the ultrasonic bonding apparatus according to the present invention forms a tool horn in a circular shape such that the contact portion of the joined object and the roller is linearly contacted, so that the joined portion of the bonded object is linear. . Therefore, even if the work is stopped and reworked, it is possible not only to minimize the spread of the surroundings of the joint of the joined part in the molten state and to spread it, but also to have a uniform thickness without leaving traces of work interruption on the continuously formed joining lines. Lines can be formed, and non-bonded parts are not generated without the phenomenon of preheating a wide area more than necessary by the contact tip, so as to make the structure thinner as in the prior art, there is almost no phenomenon that the defective bonded part bursts during use. .

In addition, the object to be bonded is transferred at a constant speed by the upper roller 31, so that even a non-skilled worker can produce a uniform bonding quality.

The above has been described through the preferred embodiment of the ultrasonic bonding apparatus according to the present invention, which is only for the purpose of helping the understanding of the present invention, and those skilled in the art through the detailed description of the present invention. It will be understood that various application examples may be implemented by changing the present invention, but it is to be understood that the present invention is included in the claims defined in the true technical spirit and the following utility model registration claims.

Claims (5)

In the ultrasonic bonding apparatus 10 for joining two parts to be joined superimposed on each other by ultrasonic cost, A servo motor 40 fixed to the base 12; A tool horn assembly composed of a vibrator 21 generating ultrasonic waves by a power source, a booster 23 coupled to the vibrator 21, and a disk-shaped tool horn 22 coupled to the booster 23; A shaft (21b) coupled to the support members (13a to 13c) having bearings mounted on the base (12) to be rotated by the servo motor (40); A housing 25 supported by the bearing to be rotatably coupled to the periphery of the vibrator 21 and the booster 23; It includes a conveying portion 30 having a roller 31 coupled to interlock with the shaft 21b and rotated through the power transmission means 41 to be in contact with the outer surface of the tool horn 22 to be rotated. Ultrasonic bonding apparatus characterized in. The ultrasonic bonding apparatus according to claim 1, wherein a coating layer (22b) coated with diamond is formed on the outermost surface of the tool horn (22). The ultrasonic bonding apparatus according to claim 1, wherein the tool horn (22) has a disk shape in which the radial direction becomes narrower to the outside. The ultrasonic bonding apparatus according to claim 1, wherein any one of a desired figure, a character, a character, or a logo is selected and engraved or embossed on the outermost surface of the tool horn (22). The ultrasonic bonding apparatus according to claim 1, wherein the width t2 of the outermost diameter of the tool horn is formed smaller than the width t1 of the roller 31.

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