DE3636072C1 - Device intended especially for the connection of electrical conductors - Google Patents

Abstract

In the case of a device which is intended especially for the connection of electrical conductors by means of ultrasound welding, in the case of which the horn (10) has allocated to it, in order to bound a compression space on all sides, a two-piece anvil having three operating surfaces, the two anvil parts (6, 7) can move in two different directions with respect to one another and with respect to the horn (10) and are each driven by a pneumatic cylinder and piston arrangement (8, 9). In order to achieve an easy-to-handle device, the two pneumatic cylinders are arranged in a housing (1), side by side with their axes parallel to one another and to the centre axis of the horn (10), and engage on transmission elements (17, 39) which deflect the operating movements of the pneumatic pistons at right angles to the anvil parts. In consequence, the device has a thin external shape with small dimensions and allows a piston grip handle (5) to be fitted, by means of whose trigger (12) the functional parts of the device are controlled. <IMAGE>

Description

The invention relates to a device for connecting of wires, strands, foil strips or the like. Made of metals and Plastics, especially of electrical conductors such as strands, by means of ultrasound, comprising a housing, an ultrasound vibrating, fixed to the housing Sonotrode, a two-part anvil with a total of three working areas and one in its cross-sectional dimensions on below different cross sections of the objects to be connected adjustable, through the sonotrode and the work surfaces of the Anvil limited compression space, the end faces of which Perform the objects to be connected permanently open are net, with the two anvil parts differentiated into two directions movable to each other and to the sonotrode on Housing are stored and for this purpose with the housing attached pneumatic cylinder and piston assemblies in Drive connection.

The device according to the invention is basically suitable for connecting elongated objects from the beginning guided type, insofar as this is due to their material properties for joining by ultrasound and their Cross sections allow insertion in the compression chamber. For the sake of simplicity, the following is only from electrical conductors, their connection with ultrasound is a main field of application of the present invention. In motor vehicle production in particular, everybody has strength vehicle a variety of knots on electrical Conductors such as copper strands.  

A known device (DE-OS 35 08 122) at the beginning specified genus from which the present invention is based, has especially been for the aforementioned application area already very proven because with her due to special Formation and assignment of the two anvil parts to each other and to a single solid sonotrode a very variable compression space is achieved. This is not only in height, but also in its breadth of all practical applications adaptable to situations without using different sonotrodes or sonotrode protrusions would have to be used, like that at other known devices (DE-PS 31 51 151, DE-OS 33 35 254) is the case. The known before mentioned here directions come because of their not inconsiderable departure measurements and weights primarily for a stationary Consideration for use.

A mobile device is already (DE-OS 33 16 873) proposed that should be used as a handheld device, however, this known device also has such a large size Dimensions and accordingly a heavy weight that its use as a handheld device is questioned. At this known device in which only one anvil part is provided is, which means that different sized compression spaces only through Turning the anvil and sonotrode and the thereby made possible different pairing of sonotrode recesses with too orderly anvil protrusions while accepting the cumbersome adjustment work can be achieved , the anvil and the sonotrode are preferably one Axes describing right angles to one another can be tilted out educated.

To the in this known device for tool actuation enable the required swiveling or tilting movements, are the pneumatic cylinders used for this their axes also perpendicular to each other and also to  Sonotrode longitudinal axis aligned, causing the device is built very bulky. Even at the front end of work it has very large dimensions because of the pneumatic cylinder for the anvil pivoting movement in a vertical plane with anvil and sonotrode head, so that the device cannot be used for narrow work spaces. Furthermore is your handle on the top of the device, whereby it can only be used hanging for low working positions, if the operator is not at an elevated level occupies place. Furthermore is located between the work tools sonotrode and anvil on the one hand and the sonotrodes pivot axis, on the other hand, such a large distance that in addition a complex counter bearing is to be arranged around the during welding process occurring forces. Finally decreed the known device does not have control elements, so that the Handle only for guiding the device, but not for Actuation of their tools is formed, whereby the loading service very difficult and one-handed work completely is excluded.

The present invention is based on the object a device based on the type specified at the beginning provide that due to their special training comparatively only small dimensions and a small Weight with easy handling and control options by the hand holding the device.

The object is achieved according to the invention in that that the pneumatic cylinder and piston assemblies alongside mutually parallel and parallel to each other and to the center axis of the sonotrode are arranged in the housing and on over Load-bearing elements attack your straight linear working movement at right angles to the anvil parts steer and that on the housing pistol grip like a handle  is attached, which with an air drive the anvil parts and provide the trigger controlling ultrasound is.

Because of the special arrangement of the two pneumatic cylinders to each other and to the sonotrode receives the pre according to the invention towards a sleek stretched outer shape that uses allows the device even in tight work spaces. Thereby and by the pistol grip-like handle, which as in Pistol grips are usually attached to the bottom of the device, the device can be conveniently operated like a pistol with a Hand and also by means of the pistol-like pull the attached trigger. The other hand of the operator person can insert or remove the one to be connected or connected electrical conductors in or out of Get compression room. The two anvil parts and the Sonotrodes are arranged at the front end of the device that the compression space with its front face about where the barrel of a pistol gun is mouth is arranged. The device according to the invention is therefore in their handling with their longitudinal axis on the Workplace directed and with their tools into a work brought fair position.

The handle is advantageous below the center of gravity the remaining parts of the pre-assembled into one unit direction attached to the housing. This location leads to a balanced position of the device in the hand of the Operator and thus affects the manageability the device cheap.

In pursuit of the inventive concept, the redirection of the straight linear working movement of the transmission elements in the loading Direction of movement of the anvil parts take place in that the Transmission elements parallel to the central axis of the sonotrode  are guided longitudinally in the housing, each on the one hand with the piston rod of the assigned pneumatic piston are connected and on the other hand one at an acute angle aligned to their rectilinear direction of work movement Have guideway, which with a guide element on assigned anvil part is in working engagement. To this The direction of movement is immediately redirected of the pneumatic cylinder and piston arrangements to the respective assigned anvil parts without using space-consuming elements apply.

In an advantageous embodiment, at least one of the Transmission elements a backdrop slot as a guideway in which a attached to the associated anvil Guide pin engages. This will help the affected Anvil part one positively controlled by the slot Movement reached.

Another advantageous way of moving redirection is that at least one of the transmission elements at its end a cone or the like as a guideway having a corresponding counter surface on the assigned Anvil part rests. This way too is simple Averaging a right angle deflection of the power transmission possible on the anvil parts.

Preferably, the arrangement is such that the one Link slot provided transmission element a straight is slidably associated with the anvil part mounted in the housing, while the transmission equipped with a cone or the like element is pivotable about a bearing journal of the housing Anvil part is assigned. This is the backdrop for the anvil, which requires a comparatively longer travel range Part used, while the cone or the like. The proportionately causes slight pivoting of the other anvil part.  

In an advantageous embodiment of the invention Arranged so that the attached to the handle Trigger for actuating the attached within the handle Pneumatic valves and / or electrical microswitches is formed. Here are the controls for Tools of the device save space within the pistols handle designed like a handle and kick therefore not visible to the outside world.

The deduction at the end of one of the legs of a U- shaped actuator bracket attached, which is pivotable within the handle is stored, with both legs of the control elements of the pneumatic valves and / or electrical microswitches lies and is provided with a return spring. This Operating bracket allows the simultaneous operation of the both for the control of the pneumatic cylinder and piston arrangements for the two anvil parts Pneumatic valves and, if necessary, the one for activating the Ultra sound energy used microswitch. On the application a microswitch for this purpose in addition to the two Pneumatic valves can also be omitted if in the outside of the device according to the invention Compressed air line a pressure switch is arranged, which at Actuation of the pneumatic valves determined pressure change in a switching pulse for the activation of the ultrasonic energy implements.

The swivel can be used to precisely adjust the operating bracket away from the operating bracket in the operating direction of the trigger be limited by an adjustable stop.

In an alternative embodiment it is provided that the Deduction on a straight line and approximately parallel to the central axis the sonotrode is provided in the handle-guided slide, to the the operating arm of a microswitch and reset  attack feathers. In this embodiment of the device is only in the pistol grip-like handle only microswitch, with the help of both those in this Case arranged outside the device pneumatic valves as well as the switching elements for the activation of the ultrasound energy can be controlled remotely.

The device according to the invention is also of interest of a compact structure that protects its functional parts designed so that the sonotrode, one for amplitude amplification the ultrasound vibrations provided booster and the order converting high-frequency electrical vibrations into ultra sound vibrations used converters in a known Are assembled in a coaxial manner to form a structural unit, the one in the area of the booster and the converter with it coaxial sleeve surrounded to form a circumferential gap is that at its front end for the passage of the Sono trode open, near the front end of the booster only stored at one actuator and in turn with her front end is clamped radially in a housing bore, the unit also on the sonotrode in Housing is stored.

It is advantageous if the housing bore through in slots in the housing wall resemble clamps is trained.

At its rear end, the sleeve is expedient by one Cover closed, with feed elements for the electrical connection of the converter is provided.

In a manageability of the device according to the invention in certain applications even further improvement design is provided that the longitudinal axis of the compression with the central axis of the sonotrode at an acute angle  of at most about 30 °, preferably about 20 °. These be Special configuration enables an oblique approach lead the device to be connected to a node electrical conductor, the longitudinal axis of the compression space is aligned parallel to the conductors. Here comes the Device not with its front tool area the conductor strand or the like in contact. It was found that the longitudinal axis of the sonotrode and thus the direction of the Ultra sound vibrations from the direction of the electrical Conductor can deviate up to about 30 ° without this partial effects on the connection of electrical Ladder to form a knot.

Further details of the invention are described below of the embodiments in part in a schematic representation reproducing drawings explained in more detail. It shows

Fig. 1 shows a first embodiment of the, before direction in a side view

Fig. 2 is a plan view of the device according to Fig. 1,

Fig. 3 is a front view of the device according to the Fig. 1 and 2,

Fig. 4 shows the longitudinal section through the device along the repeatedly indented section line IV-IV in Fig. 3,

Fig. 5 shows the cross section along the line VV in Fig. 2,

Fig. 6 the broken section taken substantially along the line VI-VI in Fig. 5,

Fig. 7, the fragmentary and partially broken bottom view of the device according to Fig. 1 to 6,

Fig. 8 is a partially broken side view of a second embodiment of the apparatus,

Fig. 9 is a plan view of the device according to Fig. 8,

Fig. 10 shows the front view of the device according to the Fig. 8 and 9 and

FIGS. 11 and 12 fragmentary longitudinal sectional views through the front region difference union sectional planes of the pre direction of the pre direction with incisions in.

To explain the first embodiment of the device according to the Invention, reference is first made to FIGS. 1 to 7. Figs. 1 to 4 illustrate the pistol-like configuration of the device, already of a size comparison of the pistol-grip like handle with the other parts of the device, the small overall dimensions of the apparent Before direction. These small dimensions in conjunction with the slim shape of the device make it handy to a degree not previously known in ultrasonic welding devices.

The housing generally designated by the reference number 1 of the device is composed of a housing block 2 and a front housing head 3 . Housing block 2 and housing head 3 are detachably connected to one another by a plurality of screws, of which only the screw 4 shown in FIG. 3 is shown. At the rear end of the housing block 2 and thus preferably consisting of one piece, the pistol grip hand 5 have been connected. Housing block 2 , housing head 3 and hand 5 are designed to receive or store the functional parts of the device in a manner to be described in more detail. The housing head 3 supports both a vertically displaceable anvil part 6 and a transversely displaceable anvil part 7 , while in the housing block 2 the pneumatic cylinder and piston arrangements 8 and 9 provided for the movement of the two anvil parts 6 and 7 are attached. In addition, the sonotrode 10 and the associated parts assembled with it to form a structural unit 11 are fastened to the housing block 2 . Within the handle 5 there is a trigger 12 for actuating the control elements for the device, which are also to be explained in more detail and, for example, in the embodiment shown, which are also accommodated within the handle 5 .

The anvil part 6, which has a lateral projection 13 , is fixed by a screw 14 ( FIG. 2) with a rod 15 , which is displaceable up and down but non-rotatably mounted in the housing head 3 . The superimposed surfaces of the anvil part 6 and the rod 15 are provided with interlocking grooves ( Fig. 1) to prevent rotation of the anvil part 6 relative to the rod 15 after tightening the screw 14 . At its lower end, the rod 15 is designed like a fork head and carries in its fork slot a transmission element 17 which is displaceably guided in the housing head 3 at right angles to the rod 15 of the anvil part 6 . The transmission element 17 is fixedly connected at its inner end to the piston rod 18 of the pneumatic cylinder and piston assembly 8 . The piston rod 18 passes longitudinally displaceably and seals a cylinder head 19 which closes off the cylinder 20 formed in the housing block 2 . The piston 21 is attached to the inner end of the piston rod 18 . The arrangement is designed to be double-acting, ie the piston 21 can be acted upon alternately from both sides by compressed air via compressed air lines not shown in FIG. 4, which are expediently located in the housing block 2 . As can be seen from FIGS . 1 and 4, the pneumatic cylinder and piston arrangement 8 is arranged axially parallel to the sonotrode 10 .

The transmission element 17 , which is longitudinally displaceable parallel to the central axis of the sonotrode 10 in the housing block 2 , has a link slot 22 which, as it increases from the inside to the outside, forms an acute angle with the linear movement direction of the transmission element 17 and guides a guide pin 23 arranged transversely on the rod 15 . In Figs. 1 and 4 be the piston 21 is in its internal limit position corresponding to a position of the guide pin 23 in the outer limit position in the sliding slot 22. In this position of the parts, the rod 15 and thus the anvil part 6 is maximally pushed ver up. On the other hand, the piston 21 with the piston rod 18 and the transmission element 17 are moved outwards, so the guide engagement of the guide pin 23 in the link slot 22 causes a downward displacement of the rod 15 and the anvil part 6 . In this way, the straight-line working movement of the pneumatic cylinder and piston assembly 8 is implemented at an angle in an up and down sliding movement of the rod 15 and the anvil part 6 .

The anvil part 7 also has a projection 24 which cooperates with the lateral projection 13 and the sonotrode 10 in a manner to be explained. The anvil part 7 is fastened at the outer end of a pivoting part 25 so that it can be adjusted transversely by means of a screw 26 . For this purpose, the screw 26 is arranged within an elongated hole 27 ( FIG. 2). To prevent rotation of the anvil part 7 with respect to the swivel part 26 , interlocking grooves 28 are provided on the contact surfaces of these parts when the screw 26 is tightened.

The pivoting part 25 is mounted in the manner of a two-armed lever about a bearing pin 29 fixed in the housing head 3, pivoting bar. The pivoting movement of the pivoting part 25 is limited by a stop 30 ( FIGS. 3, 5) attached to the housing head 3 . This stop 30 prevents the projection 24 of the anvil part 7 can touch the working surface 31 of the sonotrode 10 when the pivoting part 25 is pivoted clockwise (based on FIG. 5). The stop 30 is arranged so that between the downward surface of the projection 24 and the work surface 31 a desired narrow gap he remains. In a bore 32 of the swivel part 25 there is a compression spring 33 , which abuts the bottom of the bore with its inner end and is supported with its outer end on a plate which is detachably fastened to the housing head 3 . The pre-tensioned compression spring 33 acts on the swivel part 25 in the sense of a counterclockwise swivel movement, in which the swivel part 25 lifts off with its lower end from the stop 30 . The compression spring 33 thus ensures the opening movement of the anvil part 7 from its closed position shown in FIGS . 3 and 5.

To explain the compressed air drive of the anvil part 7 and its associated pivoting part 25 is now made in wesent union to FIGS . 5 and 7. As shown in FIG. 7 ver, in addition to the pneumatic cylinder and piston arrangement 8 already described, and parallel to the axis in the housing block 2, there is another cylinder 35 in which a likewise double-acting piston 36 is displaceable, the piston rod 37 of which is sealed by a cylinder 35 that closes Cylinder head 38 is guided to the outside. At the outer end of the piston rod 37 , a rod-shaped transmission element 39 is connected, which can also be formed in one piece with the piston rod 37 . At its outer end, the transmission element 39 , which is arranged to be longitudinally displaceable in a corresponding bore in the housing head 3 , has a cone 40 which cooperates with a corresponding counter surface 41 which is arranged at the lower end of the swivel part 25 . Cone 40 and counter surface 41 each form an acute angle with the rectilinear working direction of the transmission element 39 . It can be seen that in the event of an outward displacement of the transmission element 39 shown in FIGS . 6 and 7 in its inner limit position, the outer circumference of the cone 40 runs onto the counter surface 41 and, as a result, the pivoting part 25 against the force of the compression spring 33 into its position in FIG. 5 shown position pivoted, which corresponds to the working position of the anvil part 7 . The pivoting movement of the pivoting part 25 is ended by the stop 30 . If the transmission element 39 is moved to achieve the opening movement of the anvil part 7 again in its position shown in Fig. 7, the pivoting part 25 pivots by the action of the compression spring 33 in the counterclockwise direction (based on Fig. 5).

In the example shown, is associated with the linearly displaceably mounted in the housing anvil member 6 with the guide slot 22 of armed transmission element 17, while the equipped with the cone 40 transmission element 39 is associated to the pivoting anvil cash. 7 The arrangement can also be made within the scope of the invention so that the transmission elements for both anvil parts are formed in accordance, that is, either provide a slotted guide or inclined guideways in the form of cone surfaces or the like. Instead of a rotationally symmetrical cone end on the transmission element 39 can also a simple inclined surface can be provided which interacts with the counter surface 41 .

The journal 29 of the pivot member 25 is arranged with respect to the central axis of the sonotrode 10 so that with the beginning of pivoting opening, the lower surface of the projection 24 is increasingly removed from the working surface 31 of the sonotrode. Instead of the described pivoting mobility of the anvil part 7 , it can also be designed to be displaceable parallel to the working surface 31 and at right angles to the sliding direction of the anvil part 6 .

The two anvil parts 6 and 7 together with the working surface 31 of the sonotrode 10 define a compression space 42 for the electrical conductor to be welded by ultrasound. As can be seen from FIGS. 3 and 5, the compression space 42 is at the bottom through the working surface 31 , at the top through the surface facing and parallel to the working surface of the lateral projection 13 on the anvil part 6 , on the right through one of the right side surface of the sonotrode and parallel for this purpose, the area of the anvil part 6, which is set with a narrow gap, and finally delimited on the left by a surface of the projection 24 of the anvil part 7 which is oriented parallel to this area. In FIGS. 3 and 5, the anvil 7 is shown already in its closed position, while the anvil member is in its open position. 6 Should be to be welded electrical conductors placed in the compression space 42 or already welded conductors removed therefrom, deviating from the illustration of FIGS . 3 and 5, the anvil part 7 is pivoted to the left, so that between the adjacent edges of the projections 13 and 24 a gap 43 which facilitates insertion and removal is formed. After inserting the conductor to be welded, the horizontally movable anvil part 7 is first moved into the closed position shown in FIGS . 3 and 5, whereupon the vertically movable anvil part 6 moves downward to close the compression space 42 and compress the electrical conductor becomes. Once the desired conductor compression has been reached, the ultrasonic energy is activated for a sufficient period of exposure. When the compression chamber 42 is opened , the parts of the device are actuated in the reverse order. Simultaneous movement of the anvil parts 6 and 7 is also possible.

In the embodiment of the device according to FIGS. 1 to 7, the working surfaces of the two anvil parts 6 and 7 and the sonotrode 10 delimiting the compression space 42 are oriented such that the longitudinal axis of the compression space 42 runs parallel to the longitudinal axis of the sonotrode. Accordingly, in this exemplary embodiment, the electrical conductors are to be inserted into the compression space 42 parallel to the longitudinal axis of the sonotrode and also to be removed therefrom. In the embodiment, accordingly FIG. 8 entspre to 12, however, are the compression chamber 42 'delimiting working areas of the two anvil members 6' and 7 'are oriented so that the longitudinal axis of the compression chamber with the central axis of the sonotrode 10' forms an acute angle of approximately 20 ° forms, as indicated in Fig. 9. This is achieved by a corresponding bevel of the outer surface of the sonotrode and by corresponding bevels of the working surfaces and other interacting surfaces of the two anvil parts 6 ' and 7' . Further special features of the embodiment according to FIGS. 8 to 12 are explained in more detail below.

In both exemplary embodiments, as can be seen from FIGS. 4 and 8, the structural unit 11 consists of the sonotrode 10 and 10 ' , the booster 44 and the converter 45 . Booster 44 and Kon verter 45 are surrounded by a coaxial sleeve 46 to form a circumferential gap. The sleeve 46 is open at its front end for the passage of the sonotrode 10 and 10 ' and closed at its rear end by a cover 47 which is provided with supply elements 48 for the electrical connection, ie the high-frequency connection, of the converter 45 . Although individual components of the two exemplary embodiments according to FIGS. 1 to 7, on the one hand, and 8 to 12, on the other hand, can be designed differently, the components which correspond in function are designated with the same reference numbers for better understanding.

The sleeve 46 is composed of a front sleeve part 49 and a rear elongated tube part 50 . The construction unit 11 is fixed in the sleeve 46 only at one point of the booster 44 . For this purpose, the booster 44 is provided with a circumferential flange 51 (FIGS . 4 and 8) which bears an annular shoulder 53 in the sleeve part 49 with the interposition of an elastic element 52 . The pressure of the peripheral flange 51 on the annular shoulder 53 for the fixed mounting of the assembly 11 within the sleeve 46 is carried out by a clamping ring 54 , which abuts the peripheral flange 51 with the interposition of a further elastic element 55 . In the embodiment of Fig. 4, the clamping ring 54 is a ver externally threaded ring provided, which is screwed into a corresponding internal thread within the sleeve part 49. In the embodiment according to FIG. 8, the clamping ring 54 is a ring seen with an outer cone, which is pressed onto the peripheral flange 51 by a plurality of stud screws 56 acting on the outer cone with the interposition of the elastic element 55 .

Said front sleeve member 49 in front has a cylindrical projection 57 with a reduced outer diameter which is inserted into a block by diameter corresponding housing bore 58 of the housing block 2 to the stop of the sleeve part 49 to a step 59 of the housing. 2 The housing bore 58 is formed by slots 60 and 61 ( FIG. 1) made in the wall of the housing block 2 in the manner of a clamp. By tightening screws 62 ( Fig. 9), the cylinder extension 57 is clamped radially, whereby the sleeve 46 is fixed to the housing 1 . A through bore 63 is arranged concentrically with the housing bore 58 in the housing block 2 , through which the sonotrode 10 is passed without contact. To achieve a second bearing point for the assembly 11 , a plurality of screws 64 which engage transversely in the through bore 63 are provided in a common plane perpendicular to the sonotrode axis, of which the lower screw is shown in the drawings only in FIG. 11, while others screws are indicated in FIGS. 1, 8 and 9, only the associated threaded insertion holes 65. The screws 64 support the sonotrode 10 in the last ultrasound node before the end of the work of the sonotrode, so that ultrasonic vibrations cannot act on the screws 64 .

A special feature of the embodiment of the device according to the invention according to FIGS. 8 to 12 is that the two anvil parts 6 ' and 7' , which can be moved in different directions, are arranged reversed in relation to the embodiment according to FIGS. 1 to 7. The same also applies to the respectively assigned pneumatic cylinder and piston arrangements 8 and 9 . Furthermore, the second exemplary embodiment with respect to the formation of the link slot 22 ' differs from the first exemplary embodiment, as a comparison of FIGS. 4 and 12 shows. While in the embodiment shown in Fig. 4, the slot slot 22 takes a straight course, the slot slot 22 'has a kink approximately in the middle. As a result, the outer area of the link slot 22 'is steeper than the inner area. Due to this design, there is a different movement characteristic for the anvil part 6 ' . Assuming a constant displacement speed of the transmission element, the anvil part 6 'is initially driven faster in its downward closing displacement as long as the guide pin 23 moves in the steeper inclined portion of the link slot 22' . As soon as the guide pin 23 enters the less steeply inclined section of the link slot 22 ' , the speed of movement of the anvil part 6' is lower, but at the same time the compression force is greater, which the lateral projection 13 'of the anvil part 6' on the inserted in the compression space 42 ' electrical Leader exercises. At the beginning of the downward displacement of the anvil part 6 ' , however, no larger compression force is required, so that this movement phase can be carried out at a higher speed. Of course, the slot slot 22 in the embodiment according to FIGS. 1 to 7 can also have a bent course.

The consideration of FIGS. 1, 4 and 8 already illustrates that the handle 5 is placed approximately below the center of gravity of the other parts of the device assembled to form a unit, whereby the device rests in a balanced position in the operating hand. The handle 5 can be made with the housing 1 in one piece or else manufactured separately and then combined with the housing. The handle 5 is essentially formed by a frame 66 which has an outer contour modeled on the pistol grip shape. Inside the frame 66 has a cavity 67 which is part of both closed by screwed-on handles 68 and 69, of which the grip is shown in FIGS. 1 and not shown 8 69.

In the embodiment in Fig. 1 illustrated the Ab is train 12 at the end of the longer leg of a U-shaped actuating strap 70 is attached, or is the Be tätigungsbügel 70 in one piece. The operating bracket 70 is pivotally mounted on a bearing pin 71 attached to the frame 66 . The two legs of the actuating bracket 70 each abut a control element 72 or 73 of pneumatic valves 74 or 75 , which are fastened within the cavity 67 .

The pneumatic valves 74 and 75 are each assigned to one of the pneumatic cylinder and piston arrangements 8 and 9 , with which they are connected via compressed air lines 76 to 79 , which are closed within the housing 1 to corresponding compressed air channels, of which in Fig. 11 only the two compressed air channels 80 and 81 are shown with reference to the pressure medium cylinder and piston arrangement 9 .

In the example according to FIG. 1, a microswitch 82 is also fastened within the cavity 67 and is switched by the longer leg of the actuating bracket 70 for activating or deactivating the ultrasonic energy. The trigger 12 is moved back into its rest position shown in FIG. 1 by a return spring 83 acting on the actuating bracket 70 as soon as the trigger 12 is no longer actuated. The pivoting path of the actuating bracket 70 is limited in the actuating direction of the trigger 12 by an adjustable stop in the form of a stud screw 84 screwed into the frame 66 from below. The device is connected to a compressed air source via the compressed air line 85 which is detachably connected to the handle 5 . Correspondingly, the electrical conductors leading to the terminals of the microswitch 82 can also be led out of the handle 5 .

The embodiment shown in FIG. 8 is simplified with respect to the interior of the handle 5 compared to the embodiment described above. In this case, the trigger 12 is provided on a rectilinear and approximately parallel to the central axis of the sonotrode 10 ' in the handle 5 guided slide 86 , which is supported with its rear side on return springs 83 which rest on the frame 66 with their outer ends. The return springs 83 push the trigger 12 into the position shown in FIG. 8 when the slide 12 is not actuated. The free end of an actuating arm 88 of a microswitch 89 engages in a notch 87 in the slide 86 .

The electrical connections of the microswitch 89 are led out of the handle through the line 90 . The microswitch 89 supplies the electrical pulse for controlling the pneumatic valves, which in this example are located outside the device and are assigned to the pneumatic cylinder and piston arrangements 8 and 9 . Corresponding pneumatic lines are of course also connected to the handle 5 (not shown).

In Fig. 8, a protective cap 91 is located , which can be detachably attached to the front end of the device and the transmission element 17 or 17 ' when it drives to actuate the anvil part 6 or 6' beyond the front surface of the housing head 3 . The reference number 92 in FIGS . 1, 3 and 5 denotes a cover plate detachably attached to the housing head 3 for covering the transmission element 17 and 17 ' . The device according to the invention can be hung from above, so that it does not have to be placed on a support, for example, when not in use. For this purpose, a threaded bore 93 can be seen at a suitable point in the housing 1 , as shown in FIG. 11. For example, an eyelet or the like can be connected to the threaded bore 93 .

As can be seen from the drawings in conjunction with the above description, the height of the sealing chamber 42 or 42 'is dependent on the lower position of the lateral projection 13 of the anvil part 6 . The width of the compression space can be adjusted by changing the upper part of the anvil part 6 and 6 ' carrying the projection 13 since union, with different upper parts being provided with different projection lengths for the lateral projection 13 . According to the length of the lateral projection 13 , the lateral position of the upper part of the other anvil part 7 or 7 ' must then be adjusted.

As described above, the compression space 42 and 42 'is limited by three anvil surfaces and a working surface 31 of the sonotrode. If there was also talk that the three anvil surfaces are arranged on a two-part anvil 6, 7 or 6 ', 7' , the anvil can have more than two parts. So z. B. the anvil part 6 based on Fig. 5 composed of two parts, namely an upper crosshead, which forms the lateral projection 13 and an intermediate block to be attached between the crosshead and rod 15 . This version of the anvil part 6 or 6 ' is obtained if, for example, in Fig. 5 the on the lateral jump 13 located below, parallel to the work surface 31 aligned anvil surface is extended to a separating surface over the width of the anvil part 6 , as in Fig. 5th is indicated by a dash-dotted line. The crosshead formed in this way can be designed to be adjustable laterally in order to be able to change the width of the compression space. The intermediate block mentioned can also be combined with the rod 15 to form a part to which the crosshead is adjustably screwed.

Claims (15)

1. Device for connecting wires, strands, foils or the like. Made of metals and plastics, in particular of electrical conductors such as strands, by means of ultrasound, comprising a housing, a sonotrode generating ultrasonic vibrations, fixed to the housing, a two-part anvil With a total of three work surfaces and one with its cross-sectional dimensions adjustable to different cross-sections of the objects to be connected, the compression space limited by the sonotrode and the work surfaces of the anvil, the end faces of which are permanently open for the passage of the objects to be connected, the two anvil parts being in two different directions are movably mounted to one another and to the sonotrode on the housing and for this purpose are in drive connection with pneumatic cylinder and piston arrangements attached to the housing, characterized in that the pneumatic cylinder and piston arrangements ( 8, 9 ) lie side by side Gend and axially parallel to each other and to the central axis of the sonotrode ( 10 ) in the housing ( 1 ) and positively attack transmission elements ( 17, 39 ), which deflect their rectilinear working movement at right angles to the anvil parts ( 6, 7 ), and that on A handle ( 5 ) is attached to the housing ( 1 ) in the manner of a pistol grip and is provided with a trigger ( 12 ) which controls the compressed air drive of the anvil parts ( 6, 7 ) and the action of ultrasound. 2. Device according to claim 1, characterized in that the handle ( 5 ) is attached approximately below the center of gravity of the remaining parts of the device assembled to a unit on the housing ( 1 ). 3. Apparatus according to claim 1 or 2, characterized in that the transmission elements ( 17, 39 ) parallel to the central axis of the sonotrode ( 10 ) are longitudinally displaceable in the housing ( 1 ), each with the piston rod ( 18, 37 ) of the associated Pneumatic pistons ( 21, 36 ) are fixedly connected and on the other hand have a guide track aligned at an acute angle to their straight line working movement direction, which is in working engagement with a guide element on the associated anvil part ( 6, 7 ). 4. The device according to claim 3, characterized in that at least one of the transmission elements ( 17, 17 ' ) has a slot slot ( 22, 22' ) as a guide track, in which a guide pin attached to the associated anvil part ( 6, 6 ' ) ( 23rd ) intervenes. 5. The device according to claim 3, characterized in that at least one of the transmission elements ( 39 ) at its end has a cone ( 40 ) or the like. As a guideway, which has a corresponding counter surface ( 41 ) on the associated anvil part ( 7, 7 ' ) is present. 6. Device according to claims 3 to 5, characterized in that the with a link slot ( 22, 22 ' ) provided transmission element ( 17, 17' ) a linearly displaceable in the housing ( 1 ) mounted anvil part ( 6, 6 ' ) assigned is, while equipped with a cone ( 40 ) or the like. About transmission element ( 39 ) is associated with a pivot pin ( 29 ) of the housing ( 1 ) pivotable anvil part ( 7, 7 ' ). 7. Device according to claims 1 and 2, characterized in that the handle ( 5 ) attached trigger ( 12 ) for actuating the pneumatic valves fastened within the handle ( 74, 75 ) and / or electrical microswitch ( 82, 89 ) is trained. 8. The device according to claim 7, characterized in that the trigger ( 12 ) is attached to the end of one of the legs of a U-shaped actuating bracket ( 70 ) which is pivotally mounted within the handle ( 5 ), with both legs control elements ( 72nd , 73 ) of the pneumatic valves ( 74, 75 ) and / or an electrical microswitch ( 82 ) and is provided with a return spring ( 83 ). 9. The device according to claim 8, characterized in that the pivoting path of the actuating bracket ( 70 ) in the direction of actuation of the trigger ( 12 ) is limited by an adjustable stop ( 84 ). 10. The device according to claim 7, characterized in that the trigger ( 12 ) on a rectilinear and approximately parallel to the central axis of the sonotrode ( 10 ) in the handle ( 5 ) guided slide ( 86 ) is provided, to which the actuating arm ( 88 ) Attack a microswitch ( 89 ) and return springs ( 83 ). 11. Device according to claims 1 and 2, characterized in that the sonotrode (10), a to the amplitude of the ultrasonic vibrations provided booster (44) and the high frequency for converting electrical oscillations into ultrasound oscillations converter used (45) gain in a conventional located Way coaxial to a construction unit ( 11 ) are assembled, which is surrounded in the area of the booster ( 44 ) and the converter ( 45 ) by a coaxial sleeve ( 46 ) to form a circumferential gap, which at its front end for the passage of Sonotrode ( 10 ) is open, the booster ( 44 ) is only stored at one point near its front end and in turn is clamped radially with its front end in a housing bore ( 58 ), the assembly ( 11 ) additionally being attached to the sonotrode ( 10 ) is mounted in the housing ( 1 ). 12. The apparatus according to claim 11, characterized in that the housing bore ( 58 ) is formed in the housing wall to slots ( 60, 61 ) similar to clamps. 13. The apparatus according to claim 11, characterized in that the sleeve ( 46 ) is closed at its rear end by a cover ( 47 ) which is provided with supply elements ( 48 ) for the electrical connection of the converter ( 45 ). 14. The apparatus according to claim 1, characterized in that the longitudinal axis of the compression chamber ( 42 ' ) with the central axis of the sonotrode ( 10' ) forms an acute angle of at most about 30 °, preferably about 20 °. 15. The apparatus according to claim 4, characterized in that the link slot ( 22 ' ) has an approximately kinked in its middle course, with a steeper area for the initial phase of the closing displacement of the anvil part ( 6' ) and a less steep area for the final phase its closing shift.