JP3337995B2 - Ultrasonic vibration rotary joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic vibration rotary joining apparatus used for seamless joining or sewing.

[0002]

2. Description of the Related Art A laminate is formed by seamlessly joining or laminating a laminate by pressing a joining portion which resonates with ultrasonic vibrations and rotates, against a laminate made of a metal foil such as an alumite foil, an aluminum foil, a nickel foil, and a copper foil. Processing is known.

[0003]

However, in the ultrasonic vibration rotating device used for the above-described seamless joining and sewing processing, the mechanism for transmitting the rotational power to the joining action portion that resonates with the ultrasonic vibration is like a motor. Since a simple drive source is connected to the element including the vibrator and the resonator via a belt mechanism and a gear mechanism, the structure is complicated.

Accordingly, an object of the present invention is to provide an ultrasonic vibration rotary joining apparatus capable of transmitting ultrasonic vibration and rotation to a joining section with a simple structure.

[0005]

According to the first aspect of the present invention, there is provided a pressure raising / lowering mechanism mounted on an apparatus main body, and an ultrasonic vibration rotary drive mounted on a pressure raising / lowering output section of the pressure raising / lowering mechanism. In the ultrasonic vibration rotary joining device having a mechanism, the ultrasonic vibration rotary driving mechanism includes a cylindrical fixed outer shell attached to the elevating output unit, and a rotating inner member rotatably mounted inside the fixed outer shell. A shell, a vibrator housed in the rotating inner shell, a resonator coaxially coupled to the vibrator and arranged coaxially with the rotating inner shell, and one end of a fixed outer shell and a rotating inner shell of the resonator. At the point of maximum vibration amplitude protruding outward from one end, a joint acting portion provided in a coaxial circular shape having a diameter larger than that of the resonator, and attached to the other end of the fixed outer shell for rotating the rotating inner shell. And a driving source. According to the invention of claim 2, the resonator according to claim 1 has at least one wavelength having two minimum vibration amplitude points and has a resonator at each of the two minimum vibration points. And a support portion for being mounted inside. According to a third aspect of the present invention, a terminal board for relaying an external wiring to the vibrator and the driving source according to the first aspect is provided on a fixed outer shell.

[0006]

1 to 5 show a first embodiment of the present invention. FIG. 1 shows a side view of an ultrasonic vibration rotary joining device, and FIG. AA in FIG.
FIG. 3 shows a cross section cut along the line, and FIG. 3 shows a cross section cut along the BB line of FIG.
FIG. 4 shows a relationship between the resonator and the vibration waveform, and FIG. 5 shows an exploded view around the fixed outer shell 6 and the cover 53.

Referring to FIG. 1, an ultrasonic vibration rotary joining apparatus will be described. Reference numeral 1 denotes an apparatus main body, 2 denotes a pressurizing / elevating mechanism provided on the apparatus main body 1, and 2a denotes an elevating head of the pressurizing / elevating mechanism 2, which is operated by one of a step motor or an air cylinder actuator (not shown). It does not rotate with respect to the main body 1 and moves up and down linearly in the vertical direction indicated by the arrow Z.
3 is a holder detachably attached to the lifting head 2a,
Reference numeral 4 denotes a mounting table provided on the apparatus main body 1 for mounting components to be joined, and reference numeral 5 denotes an ultrasonic vibration rotation drive mechanism detachably attached to the holder 3. The mounting table 4 is the device body 1
On the other hand, it is mounted so as to be linearly movable in the front and back directions of the drawing via a guide mechanism such as a guide rail (not shown).

Referring to FIGS. 2 and 3, the ultrasonic vibration rotation drive mechanism 5 will be described. Ultrasonic vibration rotation drive mechanism 5
Are roughly stored in a fixed outer shell 6 detachably attached to the holder 3, a rotating inner shell 7 rotatably mounted inside the fixed outer shell 6, and stored inside the rotating inner shell 7. Vibrator 8
And a booster 9 which is coaxially connected to the vibrator 8 with a screw such as a headless screw and is coaxially housed inside the rotating inner shell 7.
And a horn 10 coaxially connected to the booster 9 with a screw such as a headless screw and protruding outward from one end of the fixed outer shell 6 and the rotating inner shell 7, and a circular tool provided on the horn 10. And a motor 12 which is attached to the other end of the fixed outer shell 6 and is a drive source for rotating the rotating inner shell 7. The booster 9 and the horn 10 form a resonator.

The fixed outer shell 6 has a storage chamber 13 which penetrates forward and backward. A rear bearing 14 and a front bearing 15 are arranged between the rotating inner shell 7 and the fixed outer shell 6 inserted in the front half of the storage chamber 13. The outer ring of the rear bearing 14 has a stepped portion 16 projecting into the storage chamber 13 of the fixed outer shell 6.
The inner ring of the rear bearing 14 is received by the step 17 projecting from the outer peripheral surface of the rotating inner shell 7,
A cylindrical bearing seat 18 is arranged between the rear bearing 14 and the front bearing 15. Both ends of the bearing seat 18 contact the outer ring of the rear bearing 14 and the outer ring of the front bearing 15 respectively. The outer ring of the front bearing 15 is pressed by an annular outer bearing retainer 19 fitted inside the front end of the fixed outer shell 6 by screw fitting. The inner ring of the front bearing 15 is pressed by an annular inner bearing presser 20 screw-fitted to the outside of the front end of the rotating inner shell 7. And the outer bearing retainer 19 is the inner bearing retainer 2.
0 and the front end of the rotating inner shell 7 are covered with a gap smaller than the surface tension of the refrigerant, and the refrigerant is prevented from entering the front bearing 15 through the gap. The outer bearing retainer 19 has a concave portion (not shown) for fitting a fastening tool on the front surface, and the fastening between the outer bearing retainer 19 and the fixed outer shell 6 is appropriately performed by fitting the fastening tool into the concave portion. Becomes

The fixed outer shell 6 has a working hole 21 in the peripheral wall. The working hole 21 is located at a position not covered by the holder 3 when the fixed outer shell 6 is attached to the holder 3, for example, at a front surface of the fixed outer shell 6 attached to the holder 3 (see FIG. 1). The bearing seat 18 is provided with the relief hole 2 corresponding to the working hole 21.
2 The rotating inner shell 7 has a storage chamber 23 penetrating back and forth and a through hole 24 in the peripheral wall. The through hole 24 is the working hole 2
Corresponds to 1. The booster 9 has a concave portion 25 corresponding to the working hole 21 on the outer peripheral surface. When the vibrator 8 and the booster 9 are mounted inside the rotary inner shell 7, the positions of the through holes 24 and the recesses 25 are aligned, and the bearing seat 18
When the is mounted inside the fixed outer shell 6, the positions of the working hole 7 and the escape hole 22 are aligned. Then, when replacing the horn 10, the worker turns the horn 10 by hand to check the alignment between the working hole 21 and the through hole 24, and then inserts a rod (not shown) from the working hole 21 into the escape hole 22 and the through hole. By inserting the rotary inner shell 7 and the booster 9 into the recess 25 through the recess 24, the replacement of the horn 10 or the joining action portion 11 is facilitated.

A vibrator 8 and a booster 9 are arranged in a storage chamber 23 of the rotating inner shell 7. When the vibrator 8 and the booster 9 are coupled to each other, the vibrator 8 and the booster 9 are inserted into the accommodation chamber 23 from the front side of the rotating inner shell 7.
The vibrator 8 is arranged in non-contact with the accommodation room 23 and the booster 9
The outer peripheral surface of the front support portion 26 and the outer peripheral surface of the rear support portion 27 are inserted in contact with the inner peripheral surface of the storage chamber 23, and the rear support portion 27 is received by a step 28 projecting into the storage chamber 23. Can be stopped. Due to the contact between the outer peripheral surface of the front support portion 26, the outer peripheral surface of the rear support portion 27, and the inner peripheral surface of the accommodation room 23, the vibrator 8 and the booster 9 are arranged in the accommodation room 23 without play in the radial direction. You. The front support part 26 is pressed by an annular fastener 29 screwed and mounted on the inside of the front end of the rotating inner shell 7. As a result, the vibrator 8 and the booster 9 are assembled coaxially to the rotating inner shell 7 without rattling in the front-rear direction. The fastener 29 has an annular seal member 30 made of rubber or synthetic resin on the inner edge. The seal member 30 comes into contact with the outer peripheral surface of the booster 9, and waterproof and dustproof the gap between the fastener 29 and the booster 9. The fastener 29 covers the outer bearing retainer 19 with a gap smaller than the surface tension of water, and prevents water from entering the rotating inner shell 7 from the gap. The fastener 29 has a concave portion (not shown) for fitting the fastening tool on the front surface, and the fastening tool is fitted into the concave portion to perform the fastening operation, so that the coupling between the fastener 29 and the rotating inner shell 7 becomes appropriate. .

The electric system to the vibrator 8 is as follows. The vibrator 8 is fitted with a cover 31 having conductivity outside.
The negative electrode of the vibrator 8 and the cover 31 are connected. Cover 3
At the center of the rear end of 1, a positive oscillator terminal 32 is electrically insulated and fixed, and the positive oscillator terminal 32 and the positive electrode terminal of the oscillator 8 are connected. At the rear end of the rotary inner shell 7, a rotary connection portion 33 made of an electric insulating material is fixed with screws. The rotary connection part 33 includes a positive rotary terminal 34 embedded therein and a negative / positive annular rotary terminal 35 called a slip ring mounted on the peripheral surface.
36, a negative electrode rotation terminal 37 protruding from the front surface,
An annular partition wall 38 made of an electrical insulating material protrudes from the peripheral surface so as to separate the positive electrode annular rotary terminals 35 and 36 from each other. The positive rotary terminal 34 and the positive annular rotary terminal 36 are connected by a conductor (not shown) embedded in the rotary connection portion 33, and the front surface of the positive rotary terminal 34 contacts the positive oscillator terminal 32. Negative ring rotary terminal 35 and negative electrode rotary terminal 37 are connected by a conductor embedded in rotary connection portion 33, and negative electrode rotary terminal 37 contacts the outer peripheral surface of cover 31. Rotary connection 3
At a position corresponding to 3, the stationary shell 6 has a plurality of stationary connections 39 made of an electrically insulating material. Each fixed connection 3
Reference numeral 9 denotes negative and positive sliding terminals 40 and 4 called brushes.
1, negative and positive elastic members 42 and 43 made of a conductive material for urging the negative and positive sliding terminals 40 and 41 toward the negative and positive annular rotating terminals 35 and 36, and negative and positive wiring terminals 4
4, 45, caps 46 and 47 made of an electrically insulating material, and an annular groove 48 located between the negative and positive sliding terminals 40 and 41.
And individually. The negative electrode sliding contact terminal 40 is the negative elastic member 4
2 and is brought into contact with the negative ring rotating terminal 35, and the positive sliding contact terminal 41 is pressed by the positive elastic member 43 and comes into contact with the positive ring rotating terminal 36.

Accordingly, the positive electrode wiring terminal 45 is wired to the positive electrode output terminal of the ultrasonic generator by wiring (not shown), so that the positive electrode path to the vibrator 8 is connected to the positive electrode wiring terminal 45, the positive elastic member 43, and the positive sliding member. The terminal 41, the positive ring rotating terminal 36, the positive electrode rotating terminal 34, and the positive electrode vibrator terminal 32 are formed. Each negative wiring terminal 44 is wired to a negative output terminal of the ultrasonic generator by wiring (not shown), so that the negative wiring terminal 44, the negative elastic member 42, the negative sliding contact terminal 40,
The negative rotating terminal 35, the negative rotating terminal 37, and the cover 31 are formed. In a state in which the positive electrode path and the negative electrode path are formed, power is supplied from the ultrasonic generator to the vibrator 8, so that the vibrator 8 generates and outputs a longitudinal ultrasonic vibration having a predetermined frequency. Further, the partition wall 38 is composed of negative and positive annular rotating terminals 35 and 36 and negative and positive sliding terminals 40 and 4.
This prevents dust short-circuiting, in which the powder generated by sliding contact with No. 1 short-circuits the negative and positive ring rotating terminals 35 and 36 to each other. The groove 48 is provided with the negative / positive ring rotating terminals 35 and 36.
This prevents dust short-circuiting in which powder generated by sliding contact between the negative and positive electrode sliding contact terminals 40 and 41 short-circuits the negative and positive electrode sliding contact terminals 40 and 41. Further, the fitting of the partition wall 38 and the groove 48 optimizes the performance of preventing the dust short-circuit.

The connection structure between the rotary inner shell 7 and the motor 12 is as follows. A shaft member 49 made of an electrically insulating material is fastened to the rear part of the rotary connection part 33 with a bolt. Shaft member 49
Is mounted so that the front coupling 50 rotates together. The motor 12 is bolted to a rear shell 51 mounted on the rear of the fixed shell 6. A rear coupling 52 is attached to the output end of the motor 12 so as to rotate together. Front coupling 50 and rear coupling 52
Have a concavo-convex shape such that they rotate together by fitting in the front-rear direction. When the motor 12 is driven to rotate in a state where the front and rear couplings 50 and 52 are fitted, the rotational power is transmitted from the output end of the motor 12 to the front and rear couplings 50 and 52, the shaft member 49, The light is transmitted to the rotating inner shell 7 via the rotating connection portion 33, and the rotating inner shell 7 rotates.

A box-shaped cover 53 is fixed to the rear outer shell 51 with screws. The cover 53 covers the intermediate portion of the fixed outer shell 6 in a non-contact manner while covering the fixed connecting portion 39 from the rear outer shell 51 in a non-contact manner. The front portion of the cover 53 is fixed to a support (not shown) provided on the outer surface of the fixed outer shell 6 with screws.

In short, as shown in FIG. 2, in the ultrasonic vibration rotary drive mechanism 5, a booster 9 and a vibrator 8 are incorporated coaxially inside a rotating inner shell 7 and coaxially coupled to the booster 9. The horn 10 having the joining action portion 11 is
It has a simple structure in which a motor 12 disposed on the front and outer sides of the fixed outer shell 6 and attached to the rear of the fixed outer shell 6 is coaxially connected to the rotating inner shell 7.

Referring to FIG. 4, a resonator composed of booster 9 and horn 10 will be described. Booster 9
Is made of a material having good acoustic characteristics such as titanium, aluminum, or quenched iron, and has a wavelength of one wavelength that resonates with the ultrasonic vibration transmitted from the vibrator 8 to form a half-wavelength. Compared with the length, the coaxial centering of the rotating inner shell 7 and the vibrator 8 and the prevention of bending during the joining process are improved. The maximum vibration amplitude points f1 and f5 of the vibration waveform W that resonates with the ultrasonic vibration from the vibrator 8 are provided at both ends of the booster 9.
And the front support 26 and the rear support 2 of the booster 9
7 have minimum vibration amplitude points f2 and f4. The vibration waveform W represents an instantaneous displacement (vibration amplitude) of the ultrasonic vibration due to resonance.

The front support portion 26 has an annular root portion 26 projecting radially outward from the minimum vibration amplitude point f4 of the vibration waveform W.
a, a cylindrical thin portion 26b extending from the periphery of the base portion 26a toward the horn 10, and an annular thick portion 26c protruding radially outward from the tip of the thin portion 26b. The rear support portion 27 includes an annular root portion 27a protruding radially outward from the minimum vibration amplitude point f2, a cylindrical thin portion 27b extending from the periphery of the root portion 27a to the vibrator 8, and a thin portion. 27
annular thick portion 27c protruding radially outward from the tip of b
And Since the outer peripheral surfaces of the thick portions 26c and 27c are entirely in contact with the inner peripheral surface of the storage chamber 23 of the rotary inner shell 7, the support interval (span) of the booster 9 in the front-rear direction with respect to the rotary inner shell 7 is increased. In addition, the prevention of bending during the joining process is improved. Thickness of root portions 26a, 27a> Thin portion 26
b, 27b, thick portions 26c, 27c> thin portions 26b, 2
7b.

The horn 10 is made of any material having good acoustic characteristics, such as titanium, aluminum, or quenched iron, and resonates with the ultrasonic vibration transmitted from the vibrator 8.
It has a length of two wavelengths. At both ends of the horn 10, there are maximum vibration amplitude points f5 and f7 of the vibration waveform W. Horn 1
At the maximum vibration amplitude point f7 of 0, the joining action portion 11 exists. The horn 10 and the joining action part 11 are formed as a single body from the same material. The outer peripheral portion of the joining action portion 11 is circular with the rotation center of the horn 10 as a center,
When the horn 10 resonates in the axial direction, the horn 10
Vibrates in the same direction (the direction parallel to the axial direction indicated by arrow X) in the same vibration mode as.

The front and rear support portions 26 of the booster 9
27 and the joint action part 1 of the horn 10
In each of the outer peripheral surfaces avoiding 1, tool recesses 54, 5 for inserting a tool for connecting and releasing the booster 9 and the vibrator 8 and connecting and releasing the booster 9 and the horn 10, respectively.
5, 56 individually.

Referring to FIG. 5, the surroundings of the fixed shell 6 and the cover 53 will be described. The cover 53 has an opening 60 at the bottom front and a terminal board 61 at the rear bottom. The terminal board 61 has a vibrator positive terminal 62, a vibrator negative terminal 63, a motor positive terminal 64, and a motor negative terminal 65 on a synthetic resin base. Then, the cover 53 is
In this state, the oscillator positive terminal 62 and the positive wiring terminal 45 of the fixed connection portion 39 are connected to the vibrator negative terminal 63 and the negative wiring terminal 44 of the fixed connection portion 39 to the motor positive terminal 64. The positive terminal of the motor 12 is connected to the negative terminal 65 for the motor and the negative terminal of the motor 12 is connected to the cover 5.
The connection is made via respective electric wires (not shown) wired using the internal space covered by 3. Further, a positive output terminal and a negative output terminal of an ultrasonic generator (not shown) are connected to the vibrator positive terminal 62 and the vibrator negative terminal 63 from outside the cover 53 via respective electric wires. A positive output terminal and a negative output terminal of a motor drive circuit (not shown) are connected to the positive motor terminal 64 and the negative motor terminal 65 from outside the cover 53 via respective electric wires. After completion of the wiring work between each terminal and the electric wire, the lid 66 is fixed to the fixed outer shell 6.
Is fixed to the opening 60 by screws through a plurality of columns 67.
Close. Therefore, by performing the above-described wiring using the opened openings 60, the wiring work is facilitated. Further, by closing the opening 60 with the lid 66, an accident such as an electric shock can be prevented. Note that a plurality of columns 68 protruding from the side surface of the fixed outer shell 6 are also present on the opposite side surface, and the cover 53 is fixed to the fixed outer shell 6 so as not to interfere with the fixed connecting portion 39.
It is a member to be attached to the tongue by screws.

The operation of the first embodiment will be described. In FIG. 1, a component to be joined, which is a laminate made of a metal foil such as an alumite foil, an aluminum foil, a nickel foil, and a copper foil, is mounted on the mounting table 4. Then, when the operator operates an operation panel (not shown) provided on the apparatus main body 1, the holder 3 of the pressure lifting mechanism 2 is lowered. During the downward movement, the joining action part 11 sandwiches the parts to be joined in cooperation with the mounting table 4. At the same time, the joining action portion 11 of the ultrasonic vibration rotation drive mechanism 5 resonates with the ultrasonic vibration. In that state, the motor 12 of the ultrasonic vibration rotation drive mechanism 5
Is driven, and the joining action part 11 rotates in one direction, the part to be joined and the mounting table 4 move in one of the front and back directions on the paper surface of FIG. The ultrasonic vibration is transmitted to the parts to be joined, and the parts to be joined are joined.

FIG. 6 shows a second embodiment of the present invention, in which an ultrasonic vibration rotation driving mechanism 5 and an auxiliary ultrasonic vibration rotation driving mechanism 71 are used. The corresponding booster 72 is rotatably housed, and the booster 72 and the booster 9 of the ultrasonic vibration rotation drive mechanism 5 coaxially mount the horn 73 corresponding to the horn 10 from both sides with a screw such as a headless screw. In the form in which the ultrasonic vibration rotation driving mechanism 5 and the auxiliary ultrasonic vibration rotation driving mechanism 71 are attached to a bifurcated holder 75 corresponding to the holder 11 in a two-sided support, the same as in the first embodiment. Applicable to The horn 73 has a length that is an integral multiple of at least one wavelength of the resonance frequency, has a maximum vibration amplitude point at both ends and a center, and has a bonding operation portion corresponding to the bonding operation portion 11 at the center maximum vibration amplitude point. 74.

In the above-described embodiment, the mounting table 4 moves linearly. However, the mounting table 4 can be similarly applied to a disk that is rotatably mounted on the apparatus main body 1.

[0025]

As described above, according to the first aspect of the present invention, the component to be joined, which is a laminate, is mounted on the mounting table, the ultrasonic vibration rotation drive mechanism is lowered, and the component to be joined is ultrasonically vibrated. In a state where the joining operation portion of the rotation drive mechanism is sandwiched between the mounting table and the mounting base, the joining operation portion is rotated and ultrasonically vibrated, so that the components to be joined can be appropriately joined. According to the second aspect of the present invention, since the supporting interval of the resonator with respect to the rotating inner shell is increased, the bending of the resonator during the joining process is prevented, and the joining process is appropriate. According to the third aspect of the present invention, the structure of the ultrasonic vibration rotation drive mechanism is simplified by providing the fixed outer shell with the terminal board for relaying external wiring to the vibrator and the drive source. Become.

[Brief description of the drawings]

FIG. 1 is a side view showing an ultrasonic vibration rotary joining device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view corresponding to a section taken along line BB of FIG. 2;

FIG. 4 is a schematic diagram showing a relationship between the resonator of the first embodiment and a vibration waveform.

FIG. 5 is an exploded perspective view of the fixed outer shell and the rear outer shell of the first embodiment.

FIG. 6 is a side view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Pressure raising / lowering mechanism 3 Holder 5 Ultrasonic vibration rotation drive mechanism 6 Fixed outer shell 7 Rotating inner shell 8 Vibrator 9 Booster 10 Horn 11 Joining operation part 12 Motor 61 Terminal board

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B06B 1/00-1/20 B23K 20/10

Claims (3)

(57) [Claims] 1. An ultrasonic vibration rotary joining device comprising: a pressurizing elevating mechanism attached to an apparatus main body; and an ultrasonic vibration rotary driving mechanism mounted on a pressurizing elevating output unit of the pressurizing elevating mechanism. A sonic vibration rotation drive mechanism, a cylindrical fixed outer shell attached to the lifting output unit, a rotating inner shell rotatably mounted inside the fixed outer shell, and a vibrator stored in the rotating inner shell, A resonator coaxially coupled to the vibrator and arranged coaxially with the rotating inner shell; and a resonator at a maximum vibration amplitude point protruding outward from one end of the fixed outer shell and one end of the rotating inner shell in the resonator. An ultrasonic vibration, comprising: a joint acting portion provided in a coaxial circular shape having a larger diameter than the above; and a driving source attached to the other end of the fixed outer shell for rotating the rotating inner shell. Rotary joining device. 2. The resonator according to claim 1, wherein the resonator has at least one wavelength having two minimum vibration amplitude points, and has a support for mounting the resonator inside the rotating inner shell at each of the two minimum vibration points. The ultrasonic vibration rotary joining apparatus according to claim 1, wherein: 3. The ultrasonic vibration rotary joining apparatus according to claim 1, wherein a terminal board for relaying an external wiring to the vibrator and the driving source is provided on the fixed outer shell.