EP2739445B1 - Jaw pair for punching out holes - Google Patents

Description

The invention relates to a pair of jaws.

Jaw pairs have already become known in various ways. It is for example on the DE 199 34 288 C1 or the US 6,427,515 B1 directed.

In addition, hydraulically operated devices to which such a pair of jaws can be fastened, have become known in various embodiments. For this purpose, for example, on the WO 99/04165 A1 or the US 6,206,663 B1 , the DE 198 54 943 A1 , the WO 99/19947 A1 or the US 6,276,186 B1 , the EP 1 084 798 A2 or the US 6,718,870 B1 and the WO 03/084719 A2 or the US 7,412,868 B2 directed.

From the US - 3,461,762 is a pair of jaws known, the jaws are aligned with each other. They are each running straight. Comparable embodiments are also from the US-A-1,822,468 and the JP 50-66292 known.

JP 50-66292 discloses a connectable with punch presses pair of jaws for punching holes or recess in preferably sheet metal parts, wherein on a jaw a punch and on the other jaw a punch opening is formed, wherein in the punch having jaw a relative to the punch against the Effect of a compression spring movable and located in the punching direction outside an outer contour of the punch located Abstreiferteil is formed.

With regard to such known punches a favorable operation is sought. Sometimes it comes after a breakthrough of the punch to jamming of sheets or other parts from which was punched out.

Proceeding from this, the invention is concerned with the task of specifying an advantageous pair of jaws for punching out holes or recesses in preferably sheet metal parts.

To solve the problem, a pair of jaws is specified, in which the jaws are designed as swivel jaws, wherein further in the punch punch having punching jaw a movable relative to the punch and located in the punching direction outside an outer contour of the punch located Abstreiferteil, wherein further the swivel jaws are formed differently, wherein the punch having the jaw is angular in a side view.

In such a pair of jaws, in which carry out in the course of performing a punching one or both jaws relative to the device movement is achieved by this scraper that a jamming of the device in the example sheet metal part or entrainment of the sheet metal part at the punch Back of the pair of jaws can be counteracted after completion of the punching process. A sequence of punching operations can be carried out efficiently without hindrance in succession. The angular design of the punch having the jaws allows a good collapse.

It is preferred that the wiper member is biased into a position at least partially overhanging the punch at its free end. This bias can cause the wiper member when moving back of the jaws, when it comes first to rest on the workpiece, is moved back until the punch comes to act on the workpiece. Also in the course of the action, the wiper initially moves back further, according to the relative position of the punch to the workpiece in which he penetrates or which he penetrates. After completion of the punching operation, when the jaws move apart again, the scraper part lying on the - remaining - workpiece supports the extension movement of the punch relative to the workpiece. If not the biasing force is exceeded, the workpiece is reliably lifted from the punch again.

In principle, the wiper part may be designed, for example, in the form of a plurality of wiper rods, preferably arranged symmetrically or with the same circumferential spacing around the punch. However, a sleeve-like design of the wiper part is preferred. In this design, any remaining small parts are reliably pushed back and finally stripped off when opening the jaws.

It is further preferred that the bias of the wiper member is achieved by a mechanical spring. In particular, a spiral spring. The coil spring may be formed surrounding a fixed fastening part or a holder of the punch. It offers a round attachment part, which is correspondingly surrounded by a in the sense of a cylindrical surface extending coil spring.

With regard to the disclosure, the ranges and ranges of values given above and in particular also include all intermediate values, in particular in 1/10 steps of said dimension, optionally also dimensionless, for example 1/10 °, 1/10 diameter, etc., on the one hand for delimiting the specified range limits from below and / or above, alternatively or additionally but also with regard to the disclosure of one or more singular values from a respectively specified range.

Fig. 1

eine perspektivische Ansicht eines Gerätes mit angebrachtem Schiebebackenpaar (nicht Gegenstand der Erfindung);

Fig. 2

eine Seitenansicht des Gerätes nach Figur 1, im oberen Bereich (nicht Gegenstand der Erfindung);

Fig. 3

einen Querschnitt durch den Gegenstand gemäß Figur 2, geschnitten entlang der Linie III - III (nicht Gegenstand der Erfindung);

Fig. 4

einen Querschnitt durch den Gegenstand gemäß Figur 2 bzw. Figur 3, geschnitten in der Ebene IV - IV in Figur 3 (nicht Gegenstand der Erfindung);

Fig. 5

eine Darstellung gemäß Figur 4, im zusammengefahrenen Zustand der Backen im Zuge eines Stanzvorganges (nicht Gegenstand der Erfindung);

Fig. 6

eine perspektivische Ansicht von schräg unten des Backenpaares wie es an dem Gerät gemäß Figur 1 angebracht ist (nicht Gegenstand der Erfindung);

Fig. 7

eine perspektivische Ansicht eines alternativen, als Schwenkbackenpaar ausgebildeten Backenpaares;

Fig. 8

eine Seitenansicht des Backenpaares gemäß Figur 7;

Fig. 9

einen Querschnitt durch den Gegenstand gemäß Figur 8, geschnitten in der Ebene IX - IX;

Fig. 10

einen Querschnitt durch den Gegenstand gemäß Figur 8 bzw. Figur 9, geschnitten in der Ebene X - X der Figur 9;

Fig. 11

eine Darstellung gemäß Figur 10, im verschwenkten Zustand bei durchgeführtem Stanzvorgang;

Fig. 12

eine weitere perspektivische Ansicht entsprechend Figur 7, ohne Geräteadapter;

Fig. 13

einen Querschnitt durch den Gegenstand gemäß Figur 12, geschnitten in der Ebene XIII - XIII;

Fig. 14

eine Explosionsdarstellung des Stanzstempels mit Abstreiferteil einer ersten Ausführungsform;

Fig. 15

einen Querschnitt durch den Stanzstempel mit Abstreiferteil zweiter Ausführungsform; und

Fig. 16

eine Explosionsdarstellung des Stanzstempels mit Abstreiferteil gemäß Figur 15.

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only exemplary embodiments. Hereby shows:

Fig. 1

a perspective view of a device with attached pair of sliding jaws (not the subject of the invention);

Fig. 2

a side view of the device after FIG. 1 , in the upper part (not the subject of the invention);

Fig. 3

a cross section through the article according to FIG. 2 , taken along the line III - III (not the subject of the invention);

Fig. 4

a cross section through the article according to FIG. 2 or Figure 3, cut in the plane IV - IV in FIG. 3 (not the subject of the invention);

Fig. 5

a representation according to FIG. 4 , in the contracted state of the jaws in the course of a punching process (not the subject of the invention);

Fig. 6

a perspective view obliquely from below of the pair of jaws as shown in the device according to FIG. 1 is attached (not the subject of the invention);

Fig. 7

a perspective view of an alternative pair of jaw pair formed as a pair of jaws;

Fig. 8

a side view of the pair of jaws according to FIG. 7 ;

Fig. 9

a cross section through the article according to FIG. 8 cut in the plane IX - IX;

Fig. 10

a cross section through the article according to FIG. 8 or FIG. 9, cut in the plane X - X of FIG FIG. 9 ;

Fig. 11

a representation according to FIG. 10 , in the pivoted state when punching performed;

Fig. 12

another perspective view accordingly FIG. 7 , without device adapter;

Fig. 13

a cross section through the article according to FIG. 12 cut in the plane XIII - XIII;

Fig. 14

an exploded view of the punch with Abstreiferteil a first embodiment;

Fig. 15

a cross section through the punch with Abstreiferteil second embodiment; and

Fig. 16

an exploded view of the punch with Abstreiferteil according to FIG. 15 ,

Presented and described at first, with reference to the FIGS. 1 to 6 , A first embodiment of a hydraulic Verpressgerätes 1 with a pair of jaws, which is designed here as a pair of sliding jaws.

In the case of the hydraulic pressing device, the embodiment is a pressing device, as is also the case in the cited WO 03/084719 A2 ( US 7,412,868 B2 ) is shown and described. Related to about the FIGS. 3 to 5 is correspondingly recognizable in the upper area of the relationship with the object described in said WO document, with regard, for example, to the return valve 2, the tank 3 and the pump tappet 4. Incidentally, for further explanation of the hydraulic device preferably used herein to the said WO or US-font reference is made in full, even for the purpose of features that are described in the WO or US font with respect to the structure of the device, in Claims of the present application to include.

The pair of jaws of the first embodiment is described in more detail with reference to FIGS FIGS. 2 to 6 explained.

A first jaw 5 has a punched opening 6 and the second jaw 7 has the punch 8.

In more detail, such as out FIG. 4 can be seen, the punched hole 6 is formed by a punch insert 9, which may be, for example, a suitably hardened metal ring member.

The punch 8 is formed in the embodiment with a round outline, so that accordingly the punch opening 6 is formed with a round outline.

It is also a square training possible, as for example from the DE 10 2010 036 482 A1 is known (compare there FIG. 1 ).

The punch 8 is surrounded by a wiper member 10 which - in the embodiment against the action of the compression spring 11 - relative to the punch 8 is movable.

As in particular a comparison of FIGS. 4 and 5 It can be seen, a front edge 12 of the embodiment in the preferred embodiment and preferably sleeve-like scraper member 10 is arranged in alignment with or protrusion to one or more formed on the punch 8 punching tips 13. The punching tips 13 are preferably edge-sided, based on a plan view of the punch 8, formed on this. However, the wiper part 10 can also be set back with its front edge in the initial state to a front region of the punch 8, in particular with respect to a punch tip 13, are arranged. While the wiper member preferably extends in a direction perpendicular to the punching direction extending plane with its front edge, as described, the punch may be formed profiled in its front surface.

In the exemplary embodiment, the wiper part 10 further has a bottom section 14, with which it engages behind the punch 8. In this respect, a positive retention, against pulling forward, on the punch 8 away, reached.

The punch 8 is further attached to a support member 15 extending in the punching direction and forming a support. This support member 15 is formed in the embodiment and preferably cylindrical. The compression spring 11 surrounds, preferably in a configuration as a helical spring, the support member 15th

The support member 15 in turn is the foot side at its end facing away from the punch 8 end, attached to an angled to the support member 15 extending mounting member 16. In the exemplary embodiment and preferred, the fastening part 16 extends at right angles to a longitudinal axis of the holding part 15.

By means of the fastening part 16 of the punch 8 is finally attached to the displacement device 18, preferably on a housing 17 of the displacement device 18 of the pair of jaws.

The jaw, which has the punched opening 6 goes almost directly into a holder 48 via.

The displacement device 18 consists in a further detail of a piston part 19 and a cylinder part 20. In addition, it consists of a return spring 21st

The piston part 19 and the cylinder part 20 are accommodated concentrically with one another in the housing 17. In extension of the cylinder part 20, a receptacle 22 is formed, in which the return spring 21 is received. The cylinder part 20 and the receptacle 22 are integrally formed or connected for common movement.

While the piston member 19 is fixed relative to the device 23 upon actuation, as well as the housing 17, the cylinder member 20 moves together with the receptacle 22. For this purpose, from the device 23 hydraulic fluid via a hydraulic connection forming connecting line 24 in the piston part Pumped 19, including in detail to the connecting line 24, a bottom hole 25 of the piston member 19 terminates.

The piston member 19 is shown in more detail in the form of an elongated, inside a likewise cylindrical recess 26 having cylindrical portion formed. The elongated design of the piston part 19, wherein a length L of the piston part preferably corresponds approximately to 2 to 5 times the diameter D of the piston part, ensures a stable guidance of the relatively movable cylinder part 20.

The housing 17 further has a transverse pin 27 which at the same time forms a support for the return spring 21 on one side. On the other side, the return spring 21 is supported on a bottom 28 of the receptacle 22. With reference to the cross pin 27 and a respective location of the housing 17, the piston member 19 and the return spring 21 extend in opposite directions to each other.

The jaws are fixed by means of the fastening part 16 or the holder 48 directly to the housing 17, and thus fixed relative to the device 23 in the connection state, or by means of the holder 48 to the receptacle 22. The attachment is rigid. The fastening part 16 or the holding part 48 can not move relative to the housing 17 or the receptacle 22. The described holders of the jaws, which are connected to one another via the displacement device 18, are furthermore connected or connectable to the device 23, including the displacement device 18, via a common connection device 30. The piston / cylinder device of the displacement device 18 is formed on the back side of the connecting device 30.

As a result of a pressure filling of the recess 26 with hydraulic fluid, the cylinder part 20 is moved out of the position according to FIG FIG. 4 in the position shown in FIG 5 moves. Since this at the same time the receptacle 22 is moved, the return spring 21 is compressed and tensioned accordingly.

The transverse pin 27 is arranged in a with respect to the connecting line 24 beyond a piston head extending portion of the housing 17 and passes through two oppositely formed slots 29 of the receptacle 22nd

The connecting line 24 is part of the connecting device 30, see also FIG. 6 , which allows a detachable connection of the unit of jaws and sliding device of the device 23. The connection device 30 may be screw-connected to the device.

In detail, the connecting device accordingly consists of the mechanical adapter, such as the screw connection, and a cavity, which merges into the connecting line 24, for the introduction and return of hydraulic fluid in the piston member 19. The connecting device 30 at the same time spaced said unit of jaws and sliding over a neck-shaped design of a facing end face of the device 23. However, it is preferred, as in the embodiment, with the threaded portion having the foot portion screwed into this end face of the device 23.

In addition, a support of the jig device connected to the device 23 is achieved in total on the device 23 by means of an elongated mounting part 31. The attachment part 31 extends transversely to a direction of displacement of the jaws.

The further embodiment with pivoting jaws is with reference to the FIGS. 7 to 13 explained.

The swivel jaws 32, 33 are connected in a common pivot 34. Beginning with the rotary joint, the swivel jaws 32, 33 on the device side basically designed in the same way as in the DE 10 2005 028 083 A1 respectively. US 7,216,532 B2 described. The disclosure of this document is hereby incorporated in full in this regard in the disclosure of the present application, also to include features of this prior art document of this application.

The bearing eyes 35, 36 of each of the jaws 32, 33 are, as also described in the cited document, formed with different thicknesses measured in the bearing opening axial direction. The storage eye 35 has a relation to the storage eye 36 about 3 times the thickness.

The clear distance between the two storage eyes 36 and 35 corresponds approximately to the thickness of the Lagerungsauges 35 of greater thickness. The jaws are aligned in the assembled state to each other, that the storage eyes 35, 36 are arranged interlocking. The storage eye 35 of greater thickness of a jaw 33 is arranged between the two storage eyes 35 and 36 of the other jaw 32 accordingly. Accordingly, the bearing lugs 36 are lesser thickness on the outside of the pair of jaws formed.

The storage openings 6 of both jaws 32, 33 are interspersed in the assembled state of the support pin 37th

As in more detail about FIG. 9 can be seen, passes through the locking pin 37 two arms 38,39 of the Halterhalses 40. The locking bolt 37 may in particular be a bolt, as he said EP 1491 295 A1 respectively. US 2005/0011236 A1 is known. The relevant content of this document is hereby incorporated in full in the disclosure present application also for the purpose of incorporating features of this document into claims of the present application.

The jaw 32 is toward the free end, or to the punch 8 out, different from the jaw 33 is formed. The jaw 32 has in a side view according to FIG. 8 an angular shape, wherein in the opening state of the jaws according to FIG. 7 starting from the hinge 34, a first jaw portion extends approximately horizontally and a second jaw portion, in contrast, approximately vertically. At the further jaw portion of the punch 8 is then supported in principle the same way as already described with respect to the jaw first embodiment.

In contrast, the second jaw 33 already extends approximately vertically in the position according to FIG. 7 respectively. FIG. 8 , Wherein the second jaw portion of the jaw 32 and the jaw 33 extend diverging to each other. Including an angle α of about 30 ° to 60 °.

Related to the FIGS. 10 to 13 the swivel jaws of the second embodiment are further explained.

In the FIGS. 10 and 11 a connection device of this embodiment is shown. It is essential that according to the doctrine of EP 1 084 798 A2 respectively. US 6,718,870 B1 in the connecting device 49 with respect to the piston / cylinder arrangement ultimately formed in cooperation with the device 23, a piston shaft 50 is already arranged which is surrounded by a return spring 51. On the cheek side of the piston skirt 50, rollers 52, which cooperate with the corresponding action surfaces 53 of the jaws, are also received in the connecting device 49 in this embodiment. The jaws are further preferred in this embodiment biased by a compression spring 54 in a position which basically corresponds to the punching position.

FIG. 11 shows the position at the end of a punching process, wherein the piston 51 is displaced hydraulically, by the not shown here connected device 23rd

The FIGS. 12 and 13 show in perspective and cross-sectional view of the arrangement of the jaws without the connecting device and in its open position.

Related to the FIGS. 14 to 16 the design of the punch 8 and its attachment is still explained in more detail with respect to two possible embodiments.

The embodiment, such as the FIG. 4 it can be seen in FIG. 14 reproduced in exploded view. The support member 15 has punching punch side a Tellerausformung 41 which projects beyond the cylindrical support member 15 transversely to a longitudinal extent of the support member 15. It is a possible large-scale support of the support member 15 is given to the facing back of the punch 8. Also, this may be given an upper stop for the compression spring 11.

This Tellerausformung has a central screw opening 42 into which a fastening screw 43 engages, which passes through the punch 8 and this attached to the support member 15.

The wiper part 10 is held on the punching punch 8 by means of a slot 44 and a screw 45 engaging therein on the one hand and by the engaging behind the bottom portion 14 on the other hand. This is about advantageous in the course the assembly, when the support member 15 is not yet connected to the fastening part 16 and insofar as the compression spring 11 has no counter-support.

The further embodiment according to the FIGS. 15 and 16 differs from the embodiment described above in that on the support member 15 at the same time, facing the punch 8, a helical extension 46 is formed. The punch 8 has a matching threaded opening 47, so that in this way the two parts can be screw-connected. <U> REFERENCE LIST </ u> 1 pressing unit 26 recess 2 Return valve 27 cross bolt 3 tank 28 ground 4 pump plunger 29 slots 5 first cheek 30 connecting device 6 punching opening 31 footpad 7 second cheek 32 swing jaw 8th punch 33 swing jaw 9 stamping Bit 34 swivel 10 scraper member 35 storage eye 11 compression spring 36 storage eye 12 edge 37 bracket bolts 13 punch tips 38 poor 14 bottom section 39 poor 15 supporting member 40 mount neck 16 attachment portion 41 Telle version shaping 17 casing 42 screw opening 18 shifter 43 fixing screw 19 piston part 44 Long hole 20 cylinder part 45 screw 21 Return spring 46 extension 22 admission 47 threaded opening 23 device 48 bracket 24 connecting line 49 connecting device 25 bottom hole 50 piston part 51 Return spring 52 roll 53 action areas 54 compression spring L length D diameter α angle

Claims (4)

1. A jaw pair for punching out holes or recesses, preferably in sheet metal parts, which jaw pair is connectable to a device (23) to be operated preferably hydraulically and is designed, for example, as a pivoting jaw pair, wherein a punch (8) is formed on one jaw and a punching opening (6) is formed on the other jaw, whereby a stripper part (10) which is situated outside of an outer contour of the punch (8) in the punching direction is formed in the jaw having the punch (8) and is movable against the action of a compression spring (11) in relation to the punch (8) and whereby the pivoting jaws are formed differently, the jaw having the punch (8) having an angled shape in a side view.
2. The jaw pair according to claim 1, characterized in that the stripper part (10) is biased into a position protruding at least partially beyond the punch (8) at its free end.
3. The jaw pair according to either of the preceding claims, characterized in that the stripper part (10) has a sleeve-like design.
4. The jaw pair according to any of the preceding claims, characterized in that the compression spring (11) surrounds a stationary mount part (15) of the punch (8).

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