JPWO2020126842A5

JPWO2020126842A5 -

Info

Publication number: JPWO2020126842A5
Application number: JP2021535682A
Authority: JP
Publication date: 2022-09-02

Description

図２は、図１の実施形態を示す斜視図である。ここから明らかなように、超音波振動ユニットの個々の部分、つまりコンバータ３と、振幅トランスフォーマ４と、ソノトロード１とはほぼ回転対称的である。ソノトロード１の、コンバータ３とは反対側の端部だけは正方形に形成されており、正方形断面の各エッジ面にはシーリング面２が設けられている。あるいは、ソノトロードは他の断面、例えば三角形、正方形以外の方形などを有することもできる。 2 is a perspective view of the embodiment of FIG. 1; FIG. As can be seen here, the individual parts of the ultrasonic vibration unit, ie converter 3, amplitude transformer 4 and sonotrode 1, are substantially rotationally symmetrical. Only the end of the sonotrode 1 facing away from the converter 3 is of square design and a sealing surface 2 is provided on each edge surface of the square cross-section. Alternatively, the sonotrode can have other cross-sections, such as triangular, rectangular rather than square, and the like.

図５の断面図から判るように、ソノトロード１は外側リブ６を有している。外側リブはソノトロード１の共振周波数の振動ノード内に配置されている。外側リブは図示の実施形態では環状に形成されている。ホルダ５には支持要素が固定されている。支持要素は半径方向において、超音波振動ユニットをホルダ内に収容できる外側位置と、支持要素が長手方向軸線の方向における超音波振動ユニットの運動を阻止する内側位置との間に固定されている。このような位置において、支持要素を捕捉することにより、外側位置の方向における支持要素７の望まれない運動を阻止することができる。支持要素７は溝３０を有している。溝内には外側リブ６が位置するようになっている。図５に示されているように今や上方から被加工材料によってソノトロードに力が加えられると、このような力は支持要素７によって受け止められる。振幅トランスフォーマ４に設けられた包囲状態のホルダ５は、加工場所から、すなわちシーリング面２から比較的大きく隔たっているので、シーリング面２に加えられた溶接力が小さなものであっても既に、超音波振動装置を撓ませることがある。従って、支持要素７が設けられている。 As can be seen from the cross-sectional view of FIG. 5, the sonotrode 1 has outer ribs 6 . The outer ribs are located within the vibration node of the resonant frequency of the sonotrode 1 . The outer ribs are annular in the illustrated embodiment. A support element is fixed to the holder 5 . The support element is fixed radially between an outer position where the ultrasonic vibration unit can be accommodated in the holder and an inner position where the support element prevents movement of the ultrasonic vibration unit in the direction of the longitudinal axis. By catching the support element in such a position, unwanted movement of the support element 7 in the direction of the outer position can be prevented. The support element 7 has grooves 30 . An outer rib 6 is positioned within the groove. If a force is now exerted on the sonotrode by the workpiece material from above as shown in FIG. Since the enclosing holder 5 on the amplitude transformer 4 is at a relatively large distance from the machining site, i.e. from the sealing surface 2 , even small welding forces applied to the sealing surface 2 already result in excessive welding force. It may bend the sonic vibration device. Support elements 7 are therefore provided.

１ソノトロード
２シーリング面
３コンバータ
４振幅トランスフォーマ
５ホルダ
６外側リブ
７支持要素
８カップリング要素
９固定要素
１０ばね
１１スロット
１２脚要素
１２脚要素
１４孔
１５脚部
１６第１スリーブ部分
１７第２スリーブ部分
１８カラー
１９孔部
２０突起
２１凹所
２２ピン
２３切り欠き
２４ねじ孔
２５中心孔
２６開口
２７突起
２８凹所
２９ねじ要素
３０溝
３１圧力板
３２止めねじ
３３スロット壁
３４スロット壁 1 sonotrode 2 sealing surface 3 converter 4 amplitude transformer 5 holder 6 outer rib 7 support element 8 coupling element 9 fixing element 10 spring 11 slot 12 leg element 12 leg element 14 hole 15 leg 16 first sleeve part 17 second sleeve part 18 Collar 19 Hole 20 Protrusion 21 Recess 22 Pin 23 Notch 24 Threaded Hole 25 Center Hole 26 Opening 27 Protrusion 28 Recess 29 Screw Element 30 Groove 31 Pressure Plate 32 Set Screw 33 Slot Wall 34 Slot Wall

Claims

An ultrasonic welding device comprising an ultrasonic vibration unit having a sonotrode and a converter,
The sonotrode (1) and the converter (3) are arranged side by side along the longitudinal axis and can resonate the ultrasonic vibration unit with ultrasonic vibration at a wavelength λ in the direction of the longitudinal axis. , an amplitude transformer (4) arranged between the sonotrode and the converter, a holder (5) being provided for holding the ultrasonic vibration unit,
The holder (5) has a clamping device, the clamping device in an open position in which the ultrasonic vibration unit can be removed from the holder, and the clamping device in contact with the ultrasonic vibration unit. and a closed position that applies a force to the ultrasonic vibration unit so that the ultrasonic vibration unit is held, and can reciprocate between a closed position, comprising:
The clamping device is formed as a sleeve having an inner surface and an outer surface, the inner surface corresponding to the outer surface of a portion of the ultrasonic vibration unit, the sleeve having a slot, and the sleeve partitioning the slot. The slot joins the outer surface of the sleeve with the inner surface of the sleeve such that it has two slot walls (33, 34) facing each other, a clamping that allows the slot walls (33, 34) to move towards each other. A device is provided whereby the clamping device is brought to the closed position and the space enclosed by the inner surface is reduced such that the ultrasonic vibration unit is clamped inside the sleeve. , ultrasonic welding equipment.

2. The ultrasonic welding device of claim 1, wherein the clamping device contacts the ultrasonic vibration unit in the closed position at at least two holding points spaced apart from each other.

The tightening device is a threaded element that passes through a stepped through hole formed in one slot wall and engages in a threaded hole formed in the other slot wall. The ultrasonic welding device according to claim 1 or 2.

said ultrasonic vibration unit so that when said slot walls (33, 34) contact each other, said ultrasonic vibration unit is securely held by said clamping device without incurring plastic deformation of said ultrasonic vibration unit. The ultrasonic welding device according to any one of claims 1 to 3, characterized in that a portion of the outer surface of the sleeve and the inner surface of the sleeve are in contact with each other.

According to any one of claims 1 to 4, characterized in that said ultrasonic vibration unit has an outer bead (6) and said holder (5) contacts said outer bead (6) in a closed position. An ultrasonic welding device as described.

Said outer bead (6) has a T-shaped cross-section, said T-shaped cross-section having legs and flanges extending from the ends of said legs at right angles on both sides, advantageously 6. The ultrasonic welding device of claim 5, wherein said flange has at least one annular collar and said clamping device contacts said collar in said closed position.

Said sonotrode (1) with said converter (3) and/or said amplitude transformer (4) with said converter (3) and/or said amplitude transformer (4) with said sonotrode (1) form coupling 7. The device according to any one of claims 1 to 6, characterized in that said form-fitting provides form-fitting in all directions in a plane perpendicular to said longitudinal axis. Ultrasonic welding equipment.

Said form-fitting has a pin (22) and a corresponding opening (26), advantageously said pin (22) to said amplitude transformer (4) and said opening (26) to said sonotrode (1) or Said converter (3) is arranged, advantageously said pin (22) and said opening (26) are formed rotationally symmetrical about said longitudinal axis with an n-fold axis of rotation, n=1 is a natural number greater than , and it is particularly advantageous that the sonotrode (1) is formed rotationally symmetrical about the longitudinal axis with an m-fold axis of rotation, where m is equal to n. The ultrasonic welding device according to claim 7, wherein

A support element (7) is provided for supporting forces exerted on the sonotrode (1) perpendicular to the longitudinal axis, the sonotrode (1) and the support element (7) corresponding to each other. having support surfaces, said support surfaces contacting each other at least when a force is applied to said sonotrode (1) perpendicular to said longitudinal axis, said support surfaces being in contact with each other said sonotrode (1) relative movement in the direction of said longitudinal axis with respect to said support element (7) and rotation about said longitudinal axis, advantageously said support element (7) is formed so as to be reciprocable between two positions perpendicular to said longitudinal axis, it being particularly advantageous that said support element (7) is lockable in at least one position. An ultrasonic welding device according to any one of the preceding claims, characterized in that a device is provided.

10. Ultrasonic welding device according to claim 9, characterized in that the support element (7) is assembled to the holder (5).

said ultrasonic vibration unit having an outer bead (6), said holder (5) contacting said outer bead (6) in a closed position;
The holder (5) has an angular positioning device, the outer bead (6) has at least one recess (21), and the angular positioning device has at least one corresponding recess (21). It has projections (20) which can engage in said recesses and thus provide a form-fitting connection, allowing rotation of said ultrasonic vibration unit about said longitudinal axis. 11. Any one of claims 1 to 10, characterized in that it is prevented by said form-fitting connection and that relative movement between said ultrasonic vibration unit and said holder (5) is not prevented in the direction of said longitudinal axis. 1. The ultrasonic welding device according to item 1.

Said outer bead (6) has a plurality of recesses (21), advantageously said angular positioning device has a plurality of projections (20) corresponding to said plurality of recesses (21), in particular 12. The method according to claim 11, characterized in that the ultrasonic vibration unit can be form-fitted with the angular positioning device in a plurality of positions which are advantageously rotated relative to each other about the longitudinal axis. Ultrasonic welding equipment.

At least one recess (21) of said outer bead (6) as well as a projection (20) of said angular positioning device have contact surfaces corresponding to each other, and said ultrasonic vibration unit is inserted into said angular positioning device. when the ultrasonic vibration unit is rotated about the longitudinal axis, the contact surfaces come into contact with each other, advantageously the contact surfaces of the recesses (21) and/or the protrusions (20) 13. An ultrasonic welding device according to claim 11 or 12, characterized in that it is inclined with respect to said longitudinal axis.

said angular positioning device being reciprocable between a fixed element (9) for fixing said angular positioning device to a machine stand and relative to said fixed element in the direction of said longitudinal axis between two positions; and a form-fitting connection can be formed between said coupling element (8) and said ultrasonic vibration unit, advantageously said coupling element (8) is elastically preloaded in one of said two positions, particularly advantageously said preload being applied by at least one spring element. or the ultrasonic welding device according to claim 1.

Said outer bead (6) is arranged in said sonotrode (1) or in an amplitude transformer (4) arranged between said sonotrode (1) and said converter (3), advantageously said outer bead ( 6 ) is located within the vibration node of the resonant vibration of wavelength λ.