EP1539391A1

EP1539391A1 - Bending tool and tool holding fixture therefor

Info

Publication number: EP1539391A1
Application number: EP03794687A
Authority: EP
Inventors: Reinhard Artmayr; Alfred HASELBÖCK; Martin Halmdienst
Original assignee: Trumpf Maschinen Austria GmbH and Co KG
Current assignee: Trumpf Maschinen Austria GmbH and Co KG
Priority date: 2002-09-16
Filing date: 2003-09-16
Publication date: 2005-06-15
Anticipated expiration: 2023-09-16
Also published as: EP1539391B1; WO2004024361A1; AU2003265705A1; ATE345885T1; ATA13832002A; DE50305783D1; AT411819B

Abstract

The invention relates to a bending tool (3), particularly a folding tool for a tool holding fixture (8) of a folding press, comprising a securing device (11) provided in the form of a detent element (13). Said detent element, when in an arresting position, projects beyond a lateral face (14, 16) of the bending tool (3), engages inside a slot-shaped recess of the tool holding fixture (8), and can be displaced in a direction perpendicular to the lateral face (14, 16). The bending tool also comprises a release device (44) that is assigned to said detent element (13). Detent elements (13), which can be displaced relative to one another and which project beyond lateral faces (14, 16) that are opposite one another inside the bending tool (3), are mounted in a shared guide assembly (25). An actuator (49) having setting elements (48) is mounted between said detent elements, holds these detent elements (13) in the arresting position, and forms a drive connection for effecting the simultaneous, diametrically opposed displacement of the detent elements (13) into a releasing position.

Description

BENDING TOOL AND TOOL RECORDING DEVICE THEREFOR

The invention relates to a bending tool as in the preamble of claim 1 and a tool receiving device as described in the preamble of claim 19.

From DE 100 54 644 AI a plate forming press with a clamping piece and tools for an adjustable press beam of the molding press is known. In the tool a to a side surface and this in a Nerriegelungsstellung with the clamping piece engageable, biased by a compression spring locking element in the direction perpendicular to the side surface direction is arranged adjustable. In the clamping piece is in alignment with the

Lock element arranged against the action of a spring Drake in the direction of the locking element adjustable actuator, with which in an adjustment in the direction of the locking element this can be brought out of engagement with the terminal block and thus the tool can be removed from the tool holder. The disadvantage here is the one-sided holding torque, whereby the tool before tilting before the clamping operation with the

Clamp is not secured.

From EP 0 494 714 AI further a pressing tool with a tool holder for a press brake is known, the tool has opposite side surfaces superior and adjustable in this direction vertical locking elements which engage the tool holder in receiving grooves of the tool holder and the over an actuator disposed in the tool from the Nerriegelungsstellung in an unlocked position in which the securing means are out of engagement with the receiving grooves, are adjusted. Such a device requires elaborate tools which, in addition, are to be correspondingly larger in size due to the arrangement of the actuating device in the tool.

The object of the invention is to provide a tool receiving device and a tool with a Nerriegelungsvorrichtung, which is to be arranged in tools of conventional dimensions and an effective function for Nerhinderung a tool crash when

Loosen the clamping device guaranteed.

This object of the invention is reflected in the characterizing part of claim 1 again. given characteristics achieved. The surprising advantage of this is that an actuator for reliable locking and unlocking that is to be integrated into the bending tool with the given dimensions is thus achieved, which can be actuated via an unlocking device that is easy to allocate and can be arranged on the tool mounting device.

It is possible embodiment according spoke 2, since such an arrangement of locking elements and plunger one hand, the insertion of the bending tools in the tool holder by inserting the tool base is made from below with little effort and after the automatic engagement of the locking elements a centric see fixture and thus exact pre-positioning for the actual clamping of the

Tools is achieved and on the other hand, a reliable fall protection to avoid tool damage or injury to the operator after releasing the jig is effectively achieved.

However, it is also advantageous embodiments according to claims 3 to 5, whereby fiinktionelle variants are achieved for possible embodiment of the securing device.

According to the education characterized in claim 6, a modular securing device is achieved, which is prefabricated as a functional unit and can be retrofitted in this form with little effort in existing bending tools.

It is also possible an advantageous embodiment as described in claim 7, because this ensures that an automatic release of the lock can not be done without active intervention to carry out the removal of the tools.

However, an advantage is also an embodiment according to claim 8, because thus longer tools for the clamping operation are accurately positioned and crash-protected accordingly for the removal process.

According to the advantageous developments as described in claims 9 to 11, a manufacturing technology is easy to manufacture and thus cost-effective but also reliably acting safety function is achieved. But is also advantageous training according to claim 12, because an economic solution by saving additional components is achieved by the combination of functions.

But it is also advantageous to form the cross-sections of the Drackstößels and the locking elements in polygonal or oval shape after approach 13, which can be omitted in conjunction with the correspondingly adapted guides additional anti-rotation.

The embodiment according to claim 14 allows the opposite arrangement of the Riegelele- elements in the tool base, whereby a tilting of the tool before the clamping operation is effectively prevented.

But also advantageous is an embodiment according to claim 15, because thus a reliable unlocking and secured removal of the tools is possible.

According to the advantageous embodiment described in spoke 16 is a good power transmission, but also ease of the automatic engagement and release achieved.

Due to the advantageous development described in claim 17, a feinstufϊge vote of the locking and releasing force is achieved.

Furthermore, an embodiment according to claim 18 is advantageous, because thus the unlocking operation, i. an adjustment of the locking elements in the unlocked position in which the locking lugs disengage from the locking receptacles, takes place only after Verrängs- the friction resistance at the bearing surface of the locking lugs in the Aufriegestungsaufhahmen by a slight lifting of the tools, but which also ensures that the tools are already secured by the operator.

However, the invention also relates to a tool receiving device, as described in the preamble of claim 19.

The object is to provide a tool holder device with the bending tools with backup devices are simply exchangeable held. This object of the invention is achieved by the characterizing features in spoke 19. The surprising advantage here is that with a simple unlocking of the Werkzeugaufnalimorrichtung a arranged in the bending tools actuator for counteracting adjustment of locking elements can be acted upon.

Possible embodiments are as described in claims 20 to 22, whereby, regardless of the position of the bending tools used in the longitudinal direction of a bending beam or a tool receiving device, an unlocking process is easy to carry out.

Of further advantage are the embodiments as described in claims 23 to 27, because it simplifies the manipulation in the removal of the tools and is easily carried out by an operator.

Finally, however, an embodiment according to claim 28 is advantageous, whereby the mechanical complexity for such adjusting arrangement for actuating the locking elements is reduced.

However, there are also embodiments according to claims 29 to 32 advantageous because characterized the integrated in the bending tools arranged actuator is actuated directly by a machine-independent tool for unlocking the bending tools.

Finally, however, embodiments according to claims 33 to 35 are advantageous, whereby an effective, easy-to-use removal of the bending tool from the Werkzeugaufhahme is achieved.

For a better understanding of the invention, this will be explained in more detail with reference to the exemplary embodiments illustrated in the figures.

Show it:

1 shows a tool holder according to the invention with a bending tool according to the invention, cut; FIG. 2 shows another embodiment of the tool receiving device with an unlocking device according to the invention, partially cut away; FIG.

3 shows a further embodiment of the bending tool according to the invention with an independent unlocking device, cut;

4 shows another embodiment of the bending tool according to the invention with a module-like securing device, cut;

5 shows the bending tool according to FIG. 4, in a view; FIG.

6 shows a further embodiment of the bending tool with the securing device, cut;

FIG. 7 shows the bending tool according to FIG. 6, in a view; FIG.

8 shows another embodiment of the bending tool according to the invention with the securing device, cut;

FIG. 9 shows the bending tool according to FIG. 8, in a view; FIG.

Fig. 10 shows a further embodiment of the unlocking device in view, cut.

Einfülirend be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or identical component names, the revelations contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or identical component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position.

In Fig. 1 is a tool holder 1 with a tool 2 arranged therein, in particular bending tool 3, as a so-called hanging tool 2, that is the in an upper adjustable press bar 4 a bending press 5 inserted bending tool 3, shown. Are known various Spai devices 6, such as terminal strips, or as shown acted upon with a pressure medium clamping cylinder 7, via which the tool 2 in a nutförrnigen tool holder 8 by means of clamping grooves 9 engageable clamping bolt 10 is tensioned and positioned. Furthermore, the tool receiving device 1 a securing device 11, which prevents a crash of the tool 2 when loosening the clamping device 6 for removing the tool 2 from the tool holder.

This locking device 11 is by two, in an aligned guide assembly 12 adjustable relative to each other guided locking elements 13, the projecting in the locking position opposite side surfaces 14 of the tool 2 in the region of a tool base 15 and arranged in mutually facing side surfaces 16 of the nutförrnigen Werkzeugaufhahme 8, preferably groove-shaped, extending in the direction of a longitudinal extension of the tool holder 1 extending locking receptacles 17 protrude.

Preferably, the locking elements 13 are formed as a cylindrical bolt 18 with nose-shaped locking lugs 19 and the guide assembly 12 is designed as a bore 20, in which case further a rotation 21 by a pin 18 arranged in and along the bore 20 extending guide groove 22 engaging pin 23rd is provided. Of course, an embodiment is possible in which the locking elements 13 have a polygonal, in particular square cross section and the guide assembly 12 is formed by a cross section of the locking elements 13 adapted guide, whereby also the rotation 21 is achieved.

In a direction of adjustment - according to double arrow 24 - the locking elements 13 vertically extending guide assembly 25 and approximately in a median plane 26, a Drackstößel 27 is adjustably guided and via a spring assembly 28, e.g. a compression spring 29, biased in the direction of the locking elements 13. This causes a biconical wedge 30 on the conicity angularly adapted contact surfaces 31, with which the locking elements 13 are provided on facing end faces 32, a pressure force.

By the action of the spring force according to - arrow 33 - the compression spring 29 and the forces acting on the locking elements 13 force components according to - arrows 34 - these are in Locking position positioned at a distance 35 between the opposite end faces 32, in which the locking lugs 19, the side surfaces 14 of the tool base 15 project beyond and engage in the locking receptacles 17, the tool holder 8. This is acted upon by a spring force according to arrow 36 of a traction mechanism 37 acting between the locking elements 13, formed in the preferred embodiment by a

Spiral tension spring 38, opposite. As a result, an adjusting force is achieved on the locking elements in the direction of the median plane 26 in order to displace them with the retaining lugs 19 out of engagement with the locking receptacles 17.

Preferably, the spring force to be applied by the compression spring 29 to the push rod 27 is adjustable according to arrow 33, for which purpose an adjusting element 39, e.g. a threaded bolt, for adjusting the bias of the compression spring 29 is provided, which is arranged in a coaxial with the guide assembly 25 extending threaded bore 40 in the tool base 15.

The spring force of the compression spring 29 - according to arrow 33 - or the resulting force components - according to arrows 34 - on the locking elements 13 is greater than the tensile force - as indicated by arrow 36 - the traction means 37 so the spiral tension spring 38th

This ensures that the locking elements 13 generally remain in a locking position in which the locking lugs 19 overhang the side surfaces of the tool base 15. A center angle 41 of the biconical adjusting wedge 30 will be greater than 15 ° to less than 120 °, preferably between 60 ° and 90 °, in any case selected in a range which is above a friction-induced self-locking.

Furthermore, the tensile force - according to arrow 36 - of the traction means 37 will be smaller than the operating force to overcome the friction, for adjusting the locking elements 13 in the unlocked position, due to the weight of the bending tool 3, in bearing surfaces 42 of the locking lugs 19th present in the locking receptacle 17. This is to carry out an unlocking and removal of the bending tool 3 from the

Tool holder 8 a raising of the bending tool 3 - according to an arrow 43 - required, thereby ensuring that the bending tool 3 was deliberately detected by the operator and thus a tool crash, associated with possibly a Be Damage to the bending tool or injury to the operator, avoided.

1, the tool receiving device 1 has an unlocking device 44, by means of which the unlocking process is carried out. According to a preferred embodiment, at least one of the locking elements 13 a, in for

Adjustment of the locking elements 13 - according to double arrow 24 - adjustable, associated actuating means 45, which acts on adjustment against the action of a spring assembly 46 on a Stirnfase 47 of the locking element 13 and thus the locking element 13 is adjusted in the direction of the median plane 26, wherein at the same time the Drackstößel 27 via the adjusting wedge 30, against the action of the compression spring 29, is raised.

The provided with the locking wedge 30 and acted upon with the coil spring 29 Drackstößel 27, and acting between the locking elements 13 Spiralzugfeder 38, forming adjusting means 48 of an actuator 49, with the synchronous opposite movement of the locking elements 13 from the locking position in the unlocked at Adjustment of one of the locking elements 13 in the direction of the median plane 26, as previously described, is achieved. The charged with the coil spring 29 Drackstößel 27 positions the locking elements 13 in principle in the locked position. If the bending tool 3 is inserted into the tool holder 8, by applying a force - according to arrow 43 -, the locking elements 13, in a row from the tool holder 8 facing angularly extending control surfaces 50, in the direction of the median plane 26 with simultaneous adjustment of the Drackstößels 27 with his Positioning wedge 30, against the action of the compression spring 29, adjusted so far until the locking lugs 19 no longer project beyond the side surfaces 14 of the bending tool 3. Thus, the tool can be inserted into the tool holder 8. If the locking lugs 19 now reach the area of the locking receptacle 17, the spring-loaded pressure ram 27 with its adjusting wedge 30 results in an adjustment of the locking elements 13 into the locking position, counter to the spring force of the spiral tension spring 38 acting between the locking elements 13.

For removal of the bending tool 3 from the Werkzeugaufhahme 8, as already described above, one of the locking elements 13 is acted upon by the actuating means 45 and thus carried out the unlocking, wherein the opposite locking element 13 in the direction of the median plane 26 under Ver. By the action of the spiral tension spring 38 - ringerang of the distance 35 is moved, whereby the locking lugs 19 of both locking elements 13 from the locking position reach the release position and thus the bending tool 3 can be removed from the tool holder 8.

Of course, there are a number of ways to technically form the unlocking device 44 with the actuating means 45, such as e.g. shown in dotted lines, to adjust the actuating means 45 by means of a control lever 51 against the action of the spring assembly 46. Furthermore, it is possible, as shown in dash-dotted lines, the unlocking device 44 with a pressure medium, e.g. Compressed air, pressure oil, etc., beauf- beatable pressure cylinder 52 to operate, which with a piston rod 53 directly to the

Stirnfase 47 of the locking element 13 acts.

2, a further embodiment of the unlocking device 44 is shown. According to this embodiment, a cover profile 62 extending over its entire length, in particular of a resiliently recoverable material, e.g. Spring plate, arranged. By extending in the vertical direction slits spring vanes 63 are formed, which protrude with angled legs 64 in the tool holder 8 arranged openings 65 in the direction of the locking receptacle 17. In the locking receptacle 17 is further, a me also over the entire length of the Verriegelungsaufnal 17 extending, provided with a spring tongues 66

Operating profile 67 attached, wherein the spring tongues 66 of the Stirnfase 47 of the locking lugs 19 of the locking elements 13 are assigned.

To remove the bending tool 3 from the Werkzeugaufhahme 8, a force - according to arrow 68 - applied to the spring blade 63, which is adjusted over the leg 64, the spring tongue 66 in the direction of the locking element 13 and thus the locking lug 19 adjusted so far until this is the side surface 14 of the bending tool 3 is no longer surmounted and thus brought out of engagement with the locking receptacle 17. This adjustment causes, as already described in the preceding FIG., An opposite adjustment movement of the further motion-coupled locking element 13. Thus, the bending tool 3 can be removed from the tool holder 8. Such a design of the unlocking device 44 allows a very quick and easy change of the bending tools. 3 FIG. 3 shows a further variant of the actuator 49 with the adjusting means 48 for locking and unlocking the bending tool 3 from the tool holder 8 and with another embodiment of the unlocking device 44 for carrying out the unlocking operation. According to this embodiment, the plunger 27 in extension of the actuating wedge 30 on an actuating extension 70, which projects into a subsequent to the guide assembly 25 and coaxial with a longitudinal central axis 71 bore 72. The adjusting projection 70 receiving bore intersects with a rectangular, to the bending tool 3 at right angles to the side surfaces 14, transverse bore 73rd

The actuating extension 70 is arranged in a connecting region 74 between the adjusting wedge 30 and a guide element 75 spaced therefrom, extending in the direction of the longitudinal central axis 71 slot 76, of which the locking elements 13 connecting spiral tension springs 38 passes.

The gate element 75 has a wedge-shaped end portion 77 which, in the end position of the Drackstößels 27, wherein the locking wedge 30, the locking elements 13 positioned in their locking position, in the bending tool 3 transverse bore 73. To operate the plunger 27, against the spring force of Drackfeder 29, and thus to adjust the locking elements 13 in their unlocked position, is used an independent in the bore 73 of the bending tool 3 insertable Drackbolzen 78, which at an end face end portion

79 has an according to the wedge shape of the end portion 77 of the actuating extension 70 angularly extending contact surface 80. Occurs after insertion of the Drackbolzens 78 in the bore 73, the contact surface 80 with the wedge-shaped end portion 77 of the link element 75 into contact, an adjustment of the plunger 27 against the spring force of the compression spring 29. In this case, the actuating wedge 30 of the Drackstößels from the area of opposite arranged locking elements 13 adjusted and due to the action of the spring force of the locking elements 13 connecting tension spring 38, there is an adjustment of the locking elements 13 in the unlocked position, in which the locking lugs 19 no longer project beyond the side surfaces 14 and thus the bending tool 3 from the tool holder. 8 can be taken.

4 and 5, another embodiment of the actuator 49 for the adjustment of the locking elements 13 between the locking position and the unlocking position is shown. According to this embodiment, in the bending tool 3 a direction transverse to the side surfaces 14 transverse direction, the locking elements 13 and the adjusting means 48 of the actuator 49 receiving housing 81 in a long hole in the bending tool 3 crossing breach 82 is attached. In the housing 81 formed in this embodiment as flat-shaped parts locking elements 13 are adjustably guided with the locking lug 19. Between the locking elements 13 at least one spiral spike spring 83 is arranged, which positions the locking elements 13 against the action of a stop arrangement 84 provided between them in the locking position, in which the locking projections 19 project beyond the side surfaces 14 of the bending tool 3. Furthermore, the actuator 49 is formed by opposing tooth elements 85, 86 of the locking elements 13 and a drive connection between the opposing tooth elements 85, 86 creating sprocket 87 which is rotatably mounted in the housing 81 about a direction of rotation of the locking elements 13 perpendicular axis of rotation 88.

By such a configuration of the actuator 49, the opposite adjustment of

Lock elements 13 from the locking position into the unlocked position upon application of one of the locking elements 13 with a force - according to arrow 89 - reaches the Stirnfase 47 of the locking lug 19.

I By the present embodiment with the housing 81, an insertable into the bending tool 3 locking module 90 is achieved, which can be prefabricated and assembled economically in series in this form, and thus also bending tools can be easily retrofitted with this unit.

6 and 7, a further embodiment of such a locking module 90 is shown, in which in the housing 81, the counter-adjustable locking elements 13 are arranged and positioned over the spring Drake 83 in the locked position. The adjusting means 48 of the actuator 49 are further formed in the embodiment shown by a Scherenhebel- arrangement 91, through which the locking elements 13, are drivingly connected. The scissors lever assembly 91 is formed by two levers 92, 93, which are pivotally connected in each case on the one hand with the locking element and pivotally connected to a centrally arranged pivot axis 94. This central pivot axis 94 is further in side walls 95, 96 of the housing 81 in the region of the median plane 26 arranged oblong holes 97 in the direction the longitudinal center plane 26 adjustably guided. Thus, the same adjustment of the locking elements 13 from the locking position to the unlocked position by applying an adjusting force - according to arrow 89 - reached on one of the locking elements 13 on the scissors lever assembly 91. For positioning in the locking position, the stop assembly 84 is provided by overlapping arranged on the locking elements 13 stop projections 98 between the locking elements 13.

FIGS. 8 and 9 show a further embodiment of the securing device 11 designed in the form of the locking module 90. In a bending tool 3 traversing the tubular housing 99 are bolt-shaped, the locking elements 13 relative to each other adjustable and guided against rotation. The locking elements 13 are positioned by the spiral track spring 83 disposed between them in the locking position, in which the locking lugs 19 project beyond the side surfaces 14. The rotation 21 is at the same time the stop assembly 84, which limits the adjustment of the locking elements 13 and is formed by an engaging in a guide groove 100 of the housing 99 locking pin 101, which projects beyond the locking elements 13 on the circumference.

As adjusting means 48 of the actuator 49 is a locking elements 13 drive-connecting pivot pin 102 is provided which is provided at its outer diameter in the form of a coarse thread with an outer coil 103 and is in engagement with an inner coil 104, which are provided in bores 105 of the locking elements 13, wherein in one of the locking elements 13, the inner coil 104 is designed to be right-handed and in the further locking element 13 to be left-handed. Accordingly, the outer coil 103 of the pivot pin 102 is half-sided on the left and half formed left-hand spiral.

Thus, an opposite movement of the locking elements 13 in their unlocked position upon application of a force - according to arrow 89 - on one of the locking lugs 19 by the rotational movement of the pivot pin 102 via the engagement of the outer coil 103 and the inner coil 104 is achieved.

FIG. 10 shows a further embodiment of the unlocking device 44 for the safety device 11. The bending tool 3 is held secured in the tool receiving device 1 by means of the bolts 18 in the locking receptacle 17. The meter Chanik for the adjustment of the bolt 18 in the tool base 15 are the previously described ways of execution.

For unlocking the bending tool 3 is provided with the spring tongues 66 actuating profile 67 is arranged from a spring plate in the now described embodiment in the locking receptacle 17, wherein the spring tongue 66 when adjusted in the direction of the tool 3, the pin 18 is applied to the front and in the adjustment direction - according to arrow 68 - presses in the unlocked position. To adjust the spring tongue 66, a slider assembly 110 is mounted in the tool holder 1 with a slide 111 which is linearly displaceable - as indicated by double arrow 112 - in the tool holder 1 and which is mounted in a bore 113 between the spring tongue 66 and the slider 111 bearing pressure pin 114 via a direction of adjustment - according to arrow 68 - angularly extending contact surface 115 cooperates.

To unlock the bending tool 3, the slider 111 is moved in the direction of the pressure bolt 114, which is adjusted as a result of Kxafrumlenkung in the contact surface 115 in the adjustment - according to arrow 68 - while the spring tongue 66 against the force of the spring action on the side surface 14 of the bending tool Pressed 3 while the bolt 18 in the unlocked position for removal of the bending tool 3 from the Werkzeugaufhah- mevorrichtung 1 adjusted.

For the sake of order, it should finally be pointed out that, for a better understanding of the construction, the tool receiving device 1 or its components have been shown partially unevenly and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can be taken from the description.

Above all, the individual in Figs. 1; 2; 3; 4, 5; 6, 7; 8, 9; 10 embodiments form the subject of independent, inventive solutions. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures. Suffixed

Tool holder 36 Arrow

Tool 37 traction means

Bending tool 38 Spiral tension spring

Press bar 39 control element

Bending press 40 threaded hole

Clamping device 41 center angle

Clamping cylinder 42 bearing surface

Tool holder 43 arrow

Clamping groove 44 unlocking device

Clamping bolt 45 actuating means

Safety device 46 spring arrangement

Guide arrangement 47 Stirnfase

Locking element 48 adjusting means

Side surface 49 actuator

Tool base 50 control surface

Side surface 51 Lever

Locking fixture 52 Drackzylinder

Bolt 53 piston rod

Bolt shoulder 54

Bore 55

Anti-twist 61 side surface

Guide groove 62 cover profile

Pin 63 spring blade

Double Arrow 64 thighs

Guide assembly 65 breakthrough

Center plane 66 spring tongue

Drackstößel 67 actuation profile

Spring arrangement 68 arrow

Coil spring 69

Wedge 70 Stitch extension

Contact surface 71 longitudinal central axis

Face 72 bore

Arrow 73 bore

Arrow 74 connection area

Distance 75 gate element 76 slot

77 end area

78 latches

79 end area 80 contact area

81 housing

82 break through

83 Spiral compression spring 84 stop arrangement

85 tooth element

86 tooth element

87 pinion 88 rotation axis

89 arrow

90 locking module

91 Shear lever assembly 92 Lever

93 levers

94 pivot axis

95 side wall 96 side wall

97 slot

98 stop projected

99 housing

100 guide groove

101 safety bolts

102 pintle

103 outside spiral

104 inner coil 105 bore

110 S feeder arrangement

111 slide 112 double arrow

113 bore

114 latches

115 contact surface

Claims

Patent claims

1. bending tool (3), in particular Abkantwerkzeug for a tool holder (8) of a press brake with a safety device (11) by a side surface (14, 16) of the bending tool (3) in a locking position superior and in a nutfÖrmige

Receiving the tool holder (8) engaging in the vertical direction to the side surface (14, 16) adjustable locking element (13) and with the locking element (13) associated unlocking device (44), characterized in that in a common guide assembly (25) in the bending tool ( 8) opposite side surfaces (14, 16) superior, relatively adjustable locking elements (13) are arranged and between these an actuator (49) with adjusting means (48) is arranged, which holds the locking elements (13) positioned in the locked position and a drive connection for the simultaneous counter-adjustment of the locking elements (13) in an unlocked position is formed.

2. bending tool according to spoke 1, characterized in that the adjusting means (48) of the actuator (49) by a the locking elements (13) mutually exciting spiral tension spring (38) and a mutually facing abutment surfaces (31) of the locking elements (13) an actuating wedge (30) forming, in a direction of adjustment of the locking elements (13) vertically extending guide assembly (25) in the bending tool (3) adjustable stored, over a spring (29) biased in the direction of the locking elements (13) pressure ram (27) are formed ,

3. bending tool according to spoke 1, characterized in that the adjusting means (48) of the actuator (49) by at least one between the locking elements (13) arranged spiral compression spring (83) and one with opposite tooth elements (86) on the locking elements (13) in Engaging, stationary rotatably mounted pinion (87) are formed.

4. bending tool according to spoke 1, characterized in that the adjusting means (48) of the actuator (49) by the between the locking elements (13) arranged spiral spring (83) and a scissor lever assembly (91) are formed.

5. Bending tool according to claim 1, characterized in that the adjusting means (48) of the actuator (49) by the between the locking elements (13) arranged spiral Dodge spring (83) and a with inner spirals (104) of the locking elements (13) in engagement, an outer spiral (103) having pivot pin (102) are formed.

6. bending tool according to one or more of claims 1 to 5, characterized in that the locking elements (13) and the adjusting means (48) in a receiving this

Housing (81, 99) are arranged, which is arranged immovably in a bending tool (3) in the direction of a thickness crossing opening (82).

7. Bending tool according to one or more of claims 1 to 6, characterized in that one of the compression spring (29) on the plunger (27) applied pressure force (according to arrow 33) or on the locking elements (13) via the adjusting wedge (30) acting force components (according to arrow 34) in total are greater than a between the locking elements (13) acting tensile force (according to arrow 36) of the spiral tension spring (38).

8. Bending tool according to one or more of claims 1 to 7, characterized in that in the direction of a tool length at a distance a plurality of locking elements (13) with the push rods (27) or the actuator (49) receiving housing (81, 99) are arranged ,

9. Bending tool according to one or more of claims 1 to 8, characterized in that the Drackstößel (27) and / or the locking elements (13) by cylindrical bolts (18) and the guide assemblies (12, 25) formed by bores (20) are.

10. Bending tool according to one or more of claims 1 to 9, characterized in that the pressure ram (27) and / or the locking elements (13) in the bores (20) are arranged secured against rotation.

11. Bending tool according to one or more of claims 1 to 10, characterized in that an anti-rotation (21) by in the longitudinal direction of the guide assembly (12, 25), in particular the bore (20), extending guide grooves (22) engaging, with the Bar elements (13) and / or push rods (27) immovably connected pins (23) is formed.

12. Bending tool according to one or more of claims 1 to 11, characterized in that the Verdrehsicherang (21) forms a stop arrangement for the adjustment of the locking elements (13).

13. Bending tool according to one or more of claims 1 to 12, characterized in that the pressure ram (27) and / or the locking elements (13) and the guide assemblies (12, 25) forming bores (20) and openings a polygonal, oval etc. have cross-section.

14. Bending tool according to one or more of claims 1 to 13, characterized in that a total length of the locking element (13) is smaller than half the thickness of the bending tool (3).

15. Bending tool according to one or more of claims 1 to 14, characterized in that an adjustment path of the locking element (13) corresponds to at least one length of the locking lug (19).

16. Bending tool according to one or more of claims 1 to 15, characterized in that a center angle (41) of the adjusting wedge (30) is between 15 ° and 120 °.

17. Bending tool according to one or more of claims 1 to 16, characterized in that a spring force of the compression spring (29) via a spring tension variable actuator (39) is adjustable.

18. Bending tool according to one or more of claims 1 to 17, characterized in that the of the traction means (37) acting on the locking elements (13) tensile force is smaller than one to overcome the frictional forces between the locking lugs (19) and the bearing surfaces ( 42) of the Verriegelungsaufhahme (17) for adjusting the locking elements (13) required in the unlocking adjustment.

19. Werkzeugaufnal mevorrichtung (1) for a bending press (5), in particular press brake, with at least one bending tool (3) according to one or more of claims 1 to 18 and with an unlocking device (44), characterized in that the Entrie- Gelungsvorrichtung (44) by a on a side surface (61) of the tool holder (8) extending in the longitudinal direction, angled spring blades (63) forming cover profile (62) is formed.

20. Werkzeugaufhahmevorrichtung according to claim 19, characterized in that the spring blades (63) with an angled leg (64) penetrate through openings (65) in the tool holder (8) in the direction of the locking elements (13).

21. Werkzeugaufnalimevorrichtung according to spoke 19 or 20, characterized in that in the nutförrnigen locking receptacle (17) provided with a spring tongues (66)

Actuating profile (67) is arranged.

22. Tool receiving device according to one or more of claims 19 to 21, characterized in that the spring tongues (66) on the actuating profile (67) the Riegelan- sets (19) of the locking elements (13) are associated.

23. Tool receiving device according to one or more of claims 19 to 22, characterized in that in the Werkzeugaufhahme (8) arranged unlocking device (44) for the locking elements (13) by at least one, in the adjustment of the locking element (13) adjustable actuating means (45 ) is formed.

24. Werkzeugaufhahmevorrichtung according to one or more of claims 19 to 23, characterized in that the actuating means (45) against the action of a spring arrangement (46) in the direction of the locking element (13) is adjustable.

25. tool receiving device according to one or more of claims 19 to 24, characterized in that the actuating means (45) in the axial direction of the locking element (13) is adjustable.

26. Tool mounting device according to one or more of claims 19 to 25, characterized in that for adjusting the actuating means (45) in the tool receiving device (1) an adjusting lever (48) is arranged.

27. Tool mounting device according to one or more of claims 19 to 26, characterized in that a plurality of actuating means (45) are adjustable together via a control lever arrangement.

28. Tool holding device according to one or more of claims 19 to 27, characterized in that the actuating means (45) is a pressure medium acted upon pressure cylinder (52).

29. Tool mounting device according to one or more of claims 19 to 28, characterized in that the actuating means (45) by a in a bending tool (3) in an adjustment direction of the pressure plunger (27) extending at right angles bore (73) insertable locking bolt (78) is formed.

30. Werkzeugaufhahmevorrichtung according to one or more of claims 19 to 29, characterized in that the Drackstößel (27) is provided with a direction of adjustment in the bore (73) of the pressure bolt (78) projecting actuating extension (70).

31. tool mounting device according to one or more of claims 19 to 30, characterized in that the actuating extension (70) of the between the locking elements (13) arranged Spiralzugfeder (38) in a slot (76) of a connecting portion

(74) of the actuating extension (70) is penetrated.

32. tool receiving device according to one or more of claims 19 to 31, characterized in that the actuating extension (70) and the pressure pin (78) for adjusting the pressure ram (27) angularly, in particular at an angle of 45 °, extending contact surfaces ( 80).

33. Tool receiving device according to one or more of the preceding claims, characterized in that the unlocking device (44) by a in the tool holder (1) arranged slide assembly (110) is formed.

34. Werkzeugaufhahmevomchtung after spoke 33, characterized in that via a slide (111) on a in a bore (113) in the direction of Biegewerkzeu- 3 (3) adjustably mounted pressure pin (114) a Verstellki-aft on the spring tongue (66) and thus on the side surface (14) of the bending tool (3) with the locking lug (19) superior bolt (18) can be applied.

35. tool holding device according to claim 34, characterized in that a restoring force on the slide (111) via the spring-loaded locking bolt (114).