EP1208949A2 - Crimp pressing tool - Google Patents

Abstract

A pressing tool for pressing pipe ends, and in particular, ends of pipe to be laid for sanitary purposes. The pressing jaws of the tool are connected to one another in an articulated manner, each jaw having an insert that has a circle-like-configuration in the area of interaction between the respective jaws.

Description

The invention first relates to a press tool for Pressing pipe ends, especially pipe ends in Sanitary area of laid pipes, with articulated to each other connected press jaws, one press jaw has a press insert in the interaction area between press jaws and the press insert in the form of a circular segment is designed and the press insert relative movable to the press jaw in the circumferential direction is, whereby the press inserts in the course of a Pressing process first on facing first Ends come to rest while at second ends still a movement gap remains.

Such pressing tools for pressing pipe ends or the like are known.

In view of the prior art described above becomes a technical problem of the invention seen in it, a press tool of the one in question Art to train in an advantageous manner.

This problem has been solved initially and essentially by the subject matter of claim 1, being thereon is turned off that the pressing tool two complementary to a closed press geometry Press jaws and that the system of Press inserts and the movement gap opposite each other, prefers diametrically opposite one another, form. As a result of this configuration is a Press tool specified, which by means of two Press jaws also for pressing Pipe ends with a larger diameter is suitable. This is due to the floating holder of the press inserts in the two press jaws, as this Press inserts relative to the assigned press jaws are movable in the circumferential direction. In the course of Pressing process come the facing first ends the press inserts to the system while this Facing the movement gap between the second ends. In a preferred one Arrangement of two press inserts is provided that the installation of the press inserts and the movement gap diametrically opposite on an axis of symmetry that complements a closed press geometry Press jaws are aligned. Is further preferred that the movement gap between the second ends of the press inserts one, the press jaws connecting joint formation of the press tool. Accordingly, it depends on the joint opposite ends of the press inserts Creation of the same. Alternatively, however, the Creation of missions in the area of joint training take place, the movement gap then opposite this joint shape remains. Further it is preferred to have one in each press jaw Assign the circumferential direction of the movable press insert. A pressing device acts advantageously, For example, a hydraulic pressing device on the Joint formation opposite free ends of the Press jaws, with further preference being given to the press inserts in an unloaded basic position so in the Press jaws are held so that they with their first, facing ends over the free end faces of the press jaws protrude so that these free ends to the system in the course of the pressing process come. Move when pressing continues each other, in the area of the first End supporting press inserts relative to the Press jaws, which means closing the opposite of the system Movement gap results.

The invention further relates to a pressing tool for pressing pipe ends, especially of Pipe ends in the sanitary area of pipes laid with articulated interconnected press jaws, one Press jaw has a press insert and in Interaction area between the press jaw and the Press insert is designed in a circular segment. Around a pressing tool of the type in question in advantageous Further training is proposed that the press inserts are detachably latched during operation are. Advantageously, the Press inserts, if necessary, without tools, at least but in the simplest way without special tools to release from the press jaws, continuing each Press insert can be replaced individually. As special It proves advantageous here that the loosening of the Crimping dies without dismantling the locking bracket and continue without loosening the locking elements, e.g. unscrewing, can be done. As a result of this Design is a change of Press inserts, preferably without the use of tools in the simplest Way. In this regard, will continue suggested that to mount two on one Press jaw radially inwards and on a radial oriented inside protruding over the press jaw, in Circular direction spaced pins are provided in the associated holes of the Intervene press inserts, at least one of which to remove the press insert from it is movable. This moving out can, for example, by means of a handle connected to a first pin in Radial direction take place. Next is also a manually operated Swiveling the first pin out of the locking bracket conceivable. In addition, in a preferred embodiment the subject of the invention provided that at a press tool with two closed to one Press geometry complementary press jaws the two in each pin arranged one pin acute angle to the assigned, the front of the include the other face facing the press jaw, so preferably an angle of 15-45 °. As special it also proves advantageous that this Bracket according to the invention both for locking of a fixed press insert as well as for taking a rest a floating d. H. in the circumferential direction press insert movable relative to the press jaw can serve what these holes when using the latter for the locking pin, which have the desired Allow mobility, such as holes, their diameter are larger, for example twice as large as the pin diameter, or elongated holes. The one before described features prove both individually and also advantageous in combination. So it goes on suggested that the movement gap in the area of a Articulation of the press jaws, d. H. opposite to the loading side of the press jaws by the Pressing tool, initially remains. Alternatively, will in this regard suggested that the movement gap in the Area of the unconnected ends of the press jaws, d. H. in the area of the press jaws being acted upon by the Pressing tool, initially remains. The press jaws can be at least partially from the Press tool releasable press members can be formed. In this regard, it is alternatively proposed that that the press jaws in jaw sections of the pliers legs of the pressing tool are formed. As a result is a one-piece design of press jaws and pliers legs selected, which press jaws for Inclusion of press inserts are formed. In the usual The pliers legs of the pressing tool are wise articulated by means of tabs. In this regard proposed in a further development of the subject matter of the invention, that the first one that can be moved out of the press insert Pin arranged away from the lug of the mouth opening is. Alternatively, this, the release of the First peg effecting the press insert also in the arranged end portion of the press jaw facing the tab his. It is also suggested that flap facing a second pin which cannot be moved out is arranged which is according to the previously described alternative also in the area of the press jaw facing away from the tab can be positioned. It is also envisaged that the second, not movable pin pivotable in the press jaw is held, the longitudinal axis of the Pin penetrates the swivel. Prefers extends the swivel axis in the Closed position, d. H. parallel in the press position for in the area of press jaws or press inserts formed jaw axis. To the specified swinging Storage of the insert to be accommodated in the press jaw it is envisaged that the second Pin an elongated hole extending in the circumferential direction the press jaw penetrates. In this regard - further suggested that the second peg against one End of the slot is spring biased. For removal of the press insert from the press jaw is the first pin from the associated hole or engagement opening the press insert can be moved out. For this can the first pin have a handle for Displacement of the first pin against a spring force in the axial direction of the same, for example by on the press insert extension, radially aligned Moving the first pin back. alternative it is proposed that the first pin on a Rocker is formed, which rocker is shaped as a handle is. In this regard, it can also be provided that that the end of the rocker facing away from the first pin in the press jaw is spring-supported for automatic Moving the first pin back into the engaged position.

The invention further relates to a press insert for a press jaw of a press tool for Pressing pipe ends, the press insert being in the form of a circular segment is designed. To such a Press use with regard to its properties in the course to further develop the pressing process in an advantageous manner, it is suggested that the press insert inside has a section of first curvature and a tongue-like section of second curvature, the unstressed, at least on the inside towards the end Section of first curvature survives. As a result of this Embodiment according to the invention are press inserts given, which allow with a pressing tool with two press jaws and two assigned press inserts Carry out pressings with nominal sizes over 50. From the state of the art are to be carried out of pressings with nominal widths over 50 press tools known which three or more press jaws or Have press inserts. Furthermore follows through the inventive design of the Pressing the beneficial effect that in the course pressing the tongue-like section second Curvature when a pressing force of e.g. 500 kg in the deflected, following the first curvature Position is shifted and that when the Force the springing back of the tongue-like Section of the second curvature lifting the Press insert caused by the compact.

The invention also relates to a press insert for a Press jaw of a pressing tool for pressing Pipe ends, the press insert being circular is designed. To put a press insert in here standing type in particular in terms of handling Advantageously, it is proposed that the press insert offset two over the circumference Has engagement openings for mounting pins. As a result of this embodiment of the invention Press insert operationally detachable in press jaws Press tool can be held in place. The previously described Features of the press insert according to the invention are an advantage both individually and in combination. So is in an advantageous development of the subject of the invention provided that the tongue-like section second curve from the section first curve is cut free, with the tip of the tongue with respect to a circumferential extension of the press insert is arranged off-center. Furthermore, the tongue-like Section a width that is less than the width of the press insert. Further alternatively or in combination with the previously described solution can be provided be that the press insert two across the width has offset engagement openings for mounting pins. An embodiment is preferred here which the engagement openings with respect to a circumferential bisector are mirror-symmetrical. The Engagement openings can be in the form of holes or Elongated holes must be formed. Is preferred here, however, that one or both engagement openings Are blind holes.

Fig. 1

ein erfindungsgemäßes Presswerkzeug in einer partiell geschnittenen Ansichtsdarstellung;

Fig. 2

das Presswerkzeug in einer perspektivischen Explosionsdarstellung;

Fig. 3

einen Presseinsatz des Presswerkzeuges in Ansicht;

Fig. 4

den Schnitt gemäß der Linie IV-IV in Fig. 3;

Fig. 5

eine Detailvergrößerung des Bereiches V-V in Fig. 4;

Fig. 6

den Schnitt gemäß der Linie VI-VI in Fig. 4;

Fig. 7

die Draufsicht auf das Presswerkzeug unter Fortlassung der auf dessen Pressbacken einwirkenden Spannvorrichtung;

Fig. 8

den Schnitt gemäß der Linie VIII-VIII in Fig. 7, die geöffnete, unbelastete Grundstellung des Presswerkzeuges darstellend;

Fig. 9

eine Folgedarstellung der Fig. 8 im Zuge eines Verpressvorganges;

Fig. 10

eine weitere Folgedarstellung, den vollendeten Verpressvorgang betreffend;

Fig. 11

eine der Fig. 8 entsprechende Darstellung, jedoch bei geöffnetem Presswerkzeug;

Fig. 12

eine Ausschnittdarstellung einer oberen Pressbacke, die Entnahmestellung des zugeordneten Presseinsatzes darstellend;

Fig. 13

eine der Fig. 8 entsprechende Darstellung, jedoch bei Verwendung von Presseinsätzen in einer zweiten Ausführungsform,

Fig. 14

eine der Fig. 1 entsprechende Darstellung, eine weitere Ausführungsform betreffend.

The invention is explained in more detail below with the aid of the attached drawing, which only show exemplary embodiments. It shows:

Fig. 1

a press tool according to the invention in a partially sectioned view;

Fig. 2

the pressing tool in a perspective exploded view;

Fig. 3

a press insert of the press tool in view;

Fig. 4

the section along the line IV-IV in Fig. 3;

Fig. 5

an enlarged detail of the area VV in Fig. 4;

Fig. 6

the section along the line VI-VI in Fig. 4;

Fig. 7

the top view of the pressing tool while omitting the clamping device acting on its pressing jaws;

Fig. 8

the section along the line VIII-VIII in Figure 7, showing the open, unloaded basic position of the pressing tool.

Fig. 9

a follow-up view of FIG. 8 in the course of a pressing process;

Fig. 10

a further follow-up presentation, regarding the completed pressing process;

Fig. 11

an illustration corresponding to Figure 8, but with the press tool open;

Fig. 12

a sectional view of an upper press jaw, representing the removal position of the associated press insert;

Fig. 13

8 shows a representation corresponding to FIG. 8, but when using press inserts in a second embodiment,

Fig. 14

a representation corresponding to FIG. 1, relating to a further embodiment.

Is shown and described initially with reference to Fig. 1 is a pressing tool 1, which is essentially from a press die 2 and a clamping device 3 composed. The press die 2 consists of essentially of two identical pressing members 4, which one end via a joint formation 5 with each other are connected.

Each pressing member 4 consists essentially of two circular section-shaped, d. H. to achieve a closed Press geometry complementary semi-circular Press jaws 6 and held over them Press inserts 7.

The joint formation 5 is achieved by one a free end of a press jaw 6 penetrating hinge pin 8, via which hinge pin 8 by means of tabs 9 a pivotable connection of the Press jaws 6 is reached.

At the ends opposite the joint formation 5 have the pressing jaws 6 also transversely to the extent of the circular section the same, the pressing jaws 6 penetrating Bolts 10, 11 on.

The clamping device 3 consists essentially of two Pliers legs 12, which are connected to tabs 13. A pliers leg 12 is in this case with the bolt 10 Press die 2 connected, for which the die 2 assigned End of the pliers leg 12 full of the bolt 10 encloses. The other pliers leg 12, however, is for receiving the other pin 11 semicircular open so that easy assembly by hooking is possible.

Between the tong legs 12 are in the area of these connecting tabs 13 are provided with cylindrical pins 14, which is an approximately symmetrical closing movement ensure the pliers legs 12.

The closing movement is done by a drive machine, of which only the cam rollers 15 are shown are such that the cam rollers 15 after inside against the inside of the pliers legs 12 trained cam tracks for spreading this side Pull the ends of the pliers up. As a result the bolts 10 and 11 of the die 2 acting leg ends moved towards each other.

The two press jaws 6, which are mirror-symmetrical are arranged and designed, bear inside, circular segment-shaped adapted to the compact Press inserts 7. The latter are form-fitting through in Circular direction spaced apart Pins 16, 17 held in the press jaws 6 (see for example Fig. 8).

These pins 16, 17 of each press jaw 6 are each aligned with a radial and protrude radially inwards into the press insert area in front. The press insert 7 has correspondingly assigned, both over the circumference and over the width Inspection openings formed with mirror symmetry 18, in which the pins 16, 17 engage. To remove a press insert 7 is a first pin 16 from the associated engagement opening 18 of the press insert 7 can be moved out, for which purpose this first, facing the tabs 13 of the tensioning device 3 Pin 16 via a manually operated rocker 19 around a aligned transversely to the circular extent of the press jaws 6 Axis 20 is pivotally displaceable. This one, in the Press jaw 6 pivotally arranged rocker 19 is against a compression spring 21 in the basic position, d. H. in the Rest position, preloaded. Furthermore, the seesaw 19 operable from the outside radially. As shown in Fig. 12 recognize is after an operation and with it associated relocating the associated first Pin 16 of the press insert 7 in the simplest Removable from the press jaw 6.

The second, facing away from the straps 13 of the tensioning device Pin 17 can be used to achieve such Bracket to be fixed. The one shown However, solution offers the possibility of both recording a fixed, d. H. to the press jaw 6 immobile Press insert 7 according to FIG. 13 as well Bracket of a floating, d. H. in the circumferential direction 6 movable press insert relative to the press jaw 7 according to the exemplary embodiment in FIGS. 1 to 12.

For this purpose, the second pin 17 is one in which Press jaw 6 held axis 22 pivotally arranged and by means of a tension spring 23 in its basic position biased according to FIG. 8. About the swivel mobility to ensure the second pin 17 is the passage opening facing the press insert 7 on the inside the press jaw 6 is shaped accordingly, for example. in the form of a circumferentially extending Slot 24.

When using a fixed press insert 7 according to 13 are engagement openings 18 for receiving the Pins 16, 17 provided in the press inserts 7, the Diameters are adapted to the pin diameters. These engagement openings 18 are such in the Press inserts 7 positioned that the end faces their free ends 25, 26 with the end faces 27, 28 the press jaw 6 are aligned. According to the invention Design are here press inserts 7 with Nominal sizes over 50, preferably over 60, can be used.

Regardless of whether the press inserts 7 floating or are fixed, the engagement openings 18 shaped as blind holes.

With floating inserts 7 the engagement openings 18 are formed such that a displacement of the press inserts 7 in the circumferential direction can be done. So these engagement openings 18 shaped, for example, as elongated blind holes his. However, it is also conceivable for the engagement openings 18 just to choose larger in diameter than the pin diameter. According to the illustrated embodiment a hole size is chosen that a shift in the circumferential direction by about one Pin diameter allowed.

In an unloaded basic position according to FIG. 8 protrude the first, facing free ends 25 of the Press inserts 7 over the associated end faces 27 the free opposite the joint formation 5 Ends of the press jaw 6, this offset a is determined by the spring action of the second pin 17 in the area of the engagement opening 18 and blocking the other at the same time Engagement opening 18 on the first pin 16.

Since the press inserts 7 to achieve a complete Press geometry designed semi-circular are in the area of the second ends 26 Back offset to the associated end faces 28 of the Press jaw 6.

Furthermore, the pins 16 and 17 are positioned such that their tenon axes are at an acute angle Alpha to the assigned end faces 27, 28 include what angle alpha in the represented Embodiment is 30 °.

In the course of a pressing process, the first comes first ends 25 of the press inserts 7 in the area of still between the end faces 27 of the press jaw 6 left gap to the plant, while at the second diametrically opposite, the joint formation 5 associated ends 26 still a movement gap 29 remains. Remain until this intermediate pressing position the press inserts 7 in their basic position, d. H. in their 6 relocated to the associated press jaws Position. First the further pressing process causes a relative displacement via the contact of the ends 25 the press inserts 7 in the circumferential direction taking the load on the tension spring 23 second pin 17.

10 are both the Ends 25 as well as the ends 26 of the press inserts 7 in Attachment to each other.

When the press die 2 is opened, it may be opened press inserts clamped on the compact 7 dragged over the pin 16, 17, the holes 18 chosen in the press inserts 7 in their size are that in every circumference Press inserts 7 no overflow of one of the pins 16 or 17 is allowed. There is always support of bore wall sections on the assigned Pins 16 and 17.

Both the pressing properties and the release of the Press inserts 7 from the compact can by a resilient Tongue 30 of the press inserts 7 can be further improved. 3 to 5 is a press insert 7 shown in individual representations. The press insert 7 has a section 40 of first curvature on the inside and a second curvature section 41 which unstressed, at least on the inside towards the end Section 40 protrudes first curvature by approx. 1-3 mm, which section 41 second curvature from the section 40 first curvature cut to form the tongue 30 is.

The tongue tip formed which projects inwards at the end 42 is, as can be seen from Fig. 4, with respect to Extent of extent of the entire press insert 7 off-center arranged, with the central arrangement of the entire tongue 30 so that, based on a circumferential bisector of the press insert 7, a tongue root 43 is positioned symmetrically to the tip of the tongue 42. The corresponds to the length of the tongue 30 measured in the circumferential direction about a third of the circumferential length of the Press insert 7. At, in the direction transverse to the circumferential direction considered central arrangements of the tongue 30 has this in the same direction a width f, which is about two thirds to three quarters of the width g of the section 40 first curvature.

They are also used to improve the pressing properties inner wall of the press insert 7 three parallel mutually extending, in the circumferential direction of the Press insert 7 both over section 40 first Curvature as well as section 41 second curvature (Tongue 30) extending ribs 44 are formed.

In the course of the pressing, which for example with 20 tons takes place, the spring tab 30 is reached, for example a pressing force of 500 kg in the deflected, the general circular section shape of the press insert 7 the following position is therefore not effective disruptive to the actual pressing process. To When the force is released, the springback occurs the tab 30 a lifting of the press insert 7 from Compact.

14 shows an alternative embodiment of a Press tool 1 according to the invention, in which the Press jaws 6 in jaw sections 45 or over the tabs 13 extending pliers legs 12 are formed. This is a pincer-like Press tool 1 formed, the press jaws 6 mirror symmetry are arranged and trained. The latter bear on the inside, adapted to the compact Press inserts 7. The latter are form-fitting through in Circular direction spaced pins 16, 17 held in the press jaws 6.

According to the first embodiment, these are Pins 16, 17 of each press jaw 6 each on one Radially oriented and protrude radially Inside in the press insert area.

Contrary to the previously described embodiment is in the embodiment of FIG. 14 to solve the press insert 7 from the associated engagement opening 18 movable first pin 16 facing away from the tab in the jaw opening formed between the press jaws the press jaw 6 arranged. As a result the second, not removable pin 17 facing tab the mouth opening arranged.

The first pin 16 extends in the longitudinal direction outward bore 46. That from this bore free-standing end of the pin 16 is with provided a handle 47 for relocating the Pin 16 along its longitudinal axis. Via a compression spring 48 is the pin 16 in the engaged position biased.

According to the first embodiment, the second pin 17 arranged pivotally. In the one shown in FIG The embodiment is the pin 17 by means of a spring-assisted, approximately across the longitudinal axis of the Pin 17 acting push pin 49 in its basic position biased. The spring preload Compression spring is provided with the reference number 50.

The press inserts 7 shown correspond to those of previously described embodiment.

Because of the changed to the first embodiment Arrangement of pin 16 and pin 17 results in a basic position according to FIG. 14, that here the second, tab-facing free ends 26 of the Press inserts 7 over the associated end faces 28 the free ends of the tabs 13 facing away from the Protruding jaw 6 protrude, here also an offset is determined by the spring action of the second pin 17 in the area of the engagement opening 18 and at the same time blocking support of the another engagement opening 18 on the first pin 16.

In the course of a pressing process come in this embodiment first the second ends 26 of the Press inserts 7 to the system, while on the first, tab-facing, diametrically opposite ends 25 there is still a movement gap. Up to this The pressing inserts remain in the intermediate pressing position 7 in its basic position. First the further pressing process causes a relative displacement via the contact of the ends 26 the press inserts 7 in the circumferential direction taking along the spring-loaded push pin 49 loaded pin 17.

All of the features disclosed are (in themselves) essential to the invention. In the disclosure of the registration is hereby also the disclosure content of the associated / attached Priority documents (copy of pre-registration) fully included, also for the purpose of characteristics of these documents in claims of the present application to include.

Claims (21)

Press tool (1) for pressing pipe ends, in particular pipe ends in the sanitary area of pipes laid, with press jaws (6) connected to one another in an articulated manner, a press jaw (6) having a press insert (7) in the area of interaction between press jaws (6) and the press insert ( 7) is designed in the form of a segment of a circle and the pressing insert (7) is movable in the circumferential direction relative to the pressing jaw (6), the pressing inserts (7) initially coming to rest against facing first ends (25) during the pressing process, while at second ends (26) there is still a movement gap (29), characterized in that the press tool (1) has two press jaws (6) which complement a closed press geometry and that the press inserts (7) and the movement gap (29) are positioned opposite one another , Press tool (1) for pressing pipe ends, in particular pipe ends in the sanitary area of pipes laid, with press jaws (6) articulated to one another, a press jaw (6) having a press insert (7) and in the area of interaction between the press jaw (6) and the press insert (7) is designed in the form of a circular segment, characterized in that the press inserts (7) are detachably held in an operationally releasable manner. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the movement gap (29) initially remains in the region of an articulated connection of the press jaws (6). Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the movement gap (29) initially remains in the region of the unconnected ends of the press jaws (6). Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the press jaws (6) are formed in jaw sections (45) of the pliers legs (12) of the press tool (1). Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that for holding two pegs (16), which are oriented radially inwards on a press jaw (6) and on a radial inside, project beyond the press jaw (6) and are spaced apart in a circular direction , 17) are provided, which engage in assigned bores (18) of the press inserts (7), at least one of which can be moved out of the press insert (7) to remove it. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the first pin (16) which is movable from the press insert (7) is arranged facing away from the lug from the jaw opening. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that a second pin (17) which cannot be moved out is arranged facing the tab. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the second pin (17) is pivotally held in the press jaw (6), the longitudinal axis of the pin (17) passing through the pivot joint. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the second pin (17) passes through an elongated hole (24) of the press jaw (6) which extends in the circumferential direction. Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the second pin (17) is spring-biased against one end of the elongated hole (24). Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the first pin (16) is formed on a rocker (19). Press tool according to one or more of the preceding claims or in particular according thereto, characterized in that the end of the rocker (19) facing away from the first pin (16) is spring-supported in the press jaw (6). Press insert (7) for a press jaw (6) of a press tool (1) for pressing pipe ends, the press insert (7) being designed in the form of a circular segment, characterized in that the press insert (7) has a section (40) of first curvature on the inside and one tongue-like section (41) of the second curvature, which, when unstressed, at least protrudes inwards at the end over the section (40) of the first curvature. Press insert (7) for a press jaw (6) of a press tool (1) for pressing pipe ends, the press insert (7) being designed in the form of a circular segment, characterized in that the press insert (7) has two circumferentially offset engagement openings (18) for holding pins (16, 17). Press insert according to one or more of claims 14 to 15 or in particular according thereto, characterized in that the tongue-like section (41) of the second curvature is cut free from the section (40) of the first curvature. Press tool according to one or more of claims 14 to 16 or in particular according thereto, characterized in that the tongue tip (42) is arranged off-center with respect to a circumferential extent of the press insert (7). Press tool according to one or more of claims 14 to 17 or in particular according thereto, characterized in that the tongue-like section (41) has a width (f) which is less than the width (g) of the press insert (7). Press tool according to one or more of claims 14 to 18 or in particular according thereto, characterized in that the press insert (7) has two engagement openings (18) for holding pins (16, 17) which are offset over the width. Press tool according to one or more of claims 14 to 19 or in particular according thereto, characterized in that the engagement openings (18) are mirror-symmetrical with respect to a circumferential bisector. Press tool according to one or more of claims 14 to 20 or in particular according thereto, characterized in that one or both engagement openings (18) are blind bores.

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