Disengagement device

Abstract

Notching device (10) comprising a first punching tool (20) and a second punching tool (21) for targeted material removal from a workpiece (18, 18'), wherein the first punching tool (20) is displaceable along a first straight guide (14) and wherein the second punching tool (21) is displaceable along a second straight guide (15), wherein the first and the second punching tool (20, 21) are displaceable transversely, in particular perpendicularly, to each other.

Description

Background of the invention

[0001] The invention relates to a notching device comprising a first punching tool and a second punching tool for targeted material removal from a workpiece.

[0002] Notching devices can be used, for example, to prepare sheet metal parts for wall cladding. Such wall cladding is typically made from several bent sheet metal parts that are joined together at the ribs. Material must first be removed from each sheet metal part, i.e., notched out. The sheet metal parts are then bent multiple times to form ribs. The notches and ribs allow for a simple and reliable connection between each sheet metal part and its adjacent part. Both the cutting and bending of the sheet metal parts must be carried out with high precision to ensure that each pair of adjacent sheet metal parts fits together perfectly at the ribs.

[0003] For notching, punching tools with knives arranged between two jaws can advantageously be used. A sheet metal part can be positioned between the jaws, and then the jaws can be moved towards each other to create a cutout in the sheet metal part. A corresponding punching tool is described in DE 42 24 649 C2.

[0004] Sheet metal parts regularly require notches at or near several of their corners. It is therefore advantageous to remove material from a sheet metal part at multiple locations, for example, at two opposite corners, in a single operation, ideally simultaneously. In the production of wall cladding, two punching tools are used, typically with different punching contours. After notches have been made at two corners of a sheet metal part, it can be turned over to create the corresponding notches at the remaining corners. One challenge is that the sheet metal parts to be processed often have varying sizes or surface shapes, necessitating the repositioning of the punching tools. This is time-consuming and, due to the high precision requirements, carries the risk of incorrect cuts.Particular challenges arise when cutouts are to be created in sheet metal parts with a trapezoidal or parallelogram-shaped base. Object of the invention

[0005] The object of the invention is to provide a reliable, flexible and easy-to-use release device. Description of the invention

[0006] The object is solved according to the invention by a notching device comprising a first punching tool and a second punching tool for targeted material removal from a workpiece, wherein the first punching tool is displaceable along a first straight guide and wherein the second punching tool is displaceable along a second straight guide, wherein the first and the second punching tool are displaceable transversely, in particular perpendicularly, to each other.

[0007] The punching tools can be moved independently of each other. Preferably, they can be moved manually. Alternatively or additionally, the notching device can have one or more drives to enable or assist the movement of the punching tools along the straight guides.

[0008] The punching tools are preferably designed as described above, i.e., knives or blades are arranged between two jaws which can be moved towards each other. Typically, the punching tools are suitable for processing workpieces, preferably sheet metal parts, with a thickness of less than 3 mm, preferably with a thickness between 0.2 mm and 1.5 mm, and particularly preferably with a thickness between 0.5 mm and 1 mm. Preferably, the punching contours of a given punching tool can be easily adapted, for example, by exchanging the jaws or inserts arranged therein for other jaws or inserts with a different knife arrangement.

[0009] The notching device according to the invention enables flexible positioning of the punching tools along two axes. Notches can be produced simultaneously at two locations on a workpiece. Furthermore, the notching device can be adapted to various workpieces of variable shape and size. In particular, the notching device can be used almost independently of the material composition and any coating present on the workpieces.

[0010] The first straight guide has a first axis, and the second straight guide has a second axis along which the punching tools are each displaceable. The axes are preferably arranged such that the first punching tool and the second punching tool can be displaced so that they can both be positioned on either the first or the second axis.

[0011] Accordingly, one of the punching tools can be moved along its assigned guide until it comes to rest at the same height as the axis of the other punching tool's guide—in other words, at the point where the first and second axes intersect. In this arrangement, both punching tools can be positioned against an edge of a workpiece that runs parallel to the axis of one of the guides. This arrangement of the punching tools is particularly advantageous for rectangular workpieces. For example, cutouts can be created simultaneously at two opposite corners of an edge of the rectangular workpiece. One of the punching tools is moved to the intersection point of the axes, while the other is positioned according to the width of the workpiece.

[0012] Preferably, the first and second stamping tools are arranged on their respective linear guides by means of a sliding bearing. In embodiments, only one of the stamping tools can be displaceable by means of a sliding bearing, while the other stamping tool is supported in another way.

[0013] Plain bearings are particularly easy and cost-effective to implement. They are also robust, reliable, and require little maintenance.

[0014] Preferably, at least one of the punching tools has a locking device with which it can be fixed to its guide. Particularly preferably, both punching tools each have a locking device, so that the punching tools can be locked independently of each other to their respective assigned guides.

[0015] Locking devices can preferably be manually operated in the manner of a quick-release fastener, for example by means of a toggle lever or a knurled screw.

[0016] To actuate the punching tools, i.e., to notch material from the workpiece, the notching device preferably incorporates pneumatic elements. In particular, the pneumatic elements can be coupled to a pedal, allowing an operator to actuate the punching tools with a simple, intuitive foot movement.

[0017] Typically, both punching tools are actuated simultaneously by activating the pneumatic elements via a single pedal. However, in alternative embodiments, it is conceivable that each punching tool can be actuated individually, for example by means of its own separate pedal.

[0018] Pneumatic elements can be designed, in particular, as pneumatic cylinders, whereby a pneumatic cylinder can press on one of the jaws of a punching tool during the disengagement process, thereby biasing and moving it towards the second, stationary jaw. The pneumatic cylinders can be double-acting, allowing the jaws to be pulled apart. Alternatively, the jaws can be pressed together against the spring force of a spring element, which provides the necessary restoring force for the subsequent separation of the jaws.

[0019] The pneumatic elements enable efficient actuation of the punching tools. However, embodiments are conceivable in which the required force is applied by other means. For example, a hydraulic system can be provided for this purpose. Alternatively, a lever system can be provided for manual actuation of the punching tools. Such a lever system can also be provided as a backup option in case of failure of the pneumatic elements or the hydraulic system at the notching device.

[0020] Preferably, the notching device has a support element on the first straight guide or the second straight guide.

[0021] The support element can be used, in particular, to support a portion of the workpiece that would otherwise protrude without support towards one of the guides. For example, if material is to be notched out at two corners of an edge of a rectangular workpiece, another edge of the workpiece typically extends away from one of the punching tools at the level of that tool, along its guide. The support element allows the workpiece to be supported at this additional edge.

[0022] The support element is preferably arranged on the first or second guide by means of a sliding bearing and is, in particular, manually displaceable along the respective guide. The support element may optionally have a locking device.

[0023] Preferably, the first and second punching tools each have an angle stop for positioning the workpiece. In some embodiments, only one of the punching tools may have an angle stop, but typically both punching tools have at least one angle stop.

[0024] The angle stops enable precise positioning of the workpiece relative to the respective punching tool in a simple manner. Preferably, a means for fine-tuning the position of the angle stops relative to the punching tools is provided.

[0025] At least one of the angle stops is preferably deactivatable. When the angle stop is deactivated, a workpiece inserted between the jaws of a punching tool no longer strikes that particular angle stop. Specifically, the angle stop can be deactivated by folding it down. For example, it can be folded to the side without being completely removed from the punching tool.

[0026] Preferably, the first punching tool and / or the second punching tool have a rod stop for positioning the workpiece.

[0027] A rod stop allows for point contact between the rod stop and a point on the edge of a workpiece. This enables the precise positioning of workpieces, particularly those that are not rectangular, in relation to the punching tools.

[0028] Each rod stop can be rigidly mounted on a respective punching tool. Preferably, however, the position of a rod stop is adjustable, at least during tool use, in particular by tilting the rod axis.

[0029] The linear guides are preferably arranged on a common support. In particular, the support can be a support table or include a support table. The support can, if necessary, be height-adjustable together with the guides and may include lockable casters.

[0030] The linear guides are preferably designed as rails. Particularly preferably, each rail has two parallel guide webs on which the punching tools can be moved along their respective rails by means of the sliding bearings. The longitudinal axis of one rail thus corresponds to the first axis of the first linear guide, and the longitudinal axis of the other rail corresponds to the second axis of the second linear guide. The guide webs of at least one rail can be arranged horizontally side by side or vertically one above the other.

[0031] The two parallel guide rails ensure that each punching tool is guided precisely and without play, and without tilting, on its rail. Furthermore, the forces generated when the punching tools are operated can be reliably absorbed.

[0032] Typically, one of the guides, or rails, has a longitudinal dimension between 50 cm and 120 cm, while the other guide measures between 80 cm and 200 cm. In a preferred embodiment, one of the guides has a longitudinal dimension of approximately 80 cm, while the other guide has a longitudinal dimension of approximately 120 cm. Such dimensions particularly facilitate the processing of sheet metal parts of common sizes used in the manufacture of wall cladding. Furthermore, a correspondingly dimensioned notching device can be easily handled and, if necessary, easily transported.

[0033] Further features and advantages of the invention will become apparent from the description and the drawing. Likewise, the features mentioned above and those described in more detail below can each be used individually or in combination in any suitable way according to the invention. The embodiments shown and described are not to be understood as an exhaustive list, but rather serve as examples for illustrating the invention. Brief description of the drawing

[0034] They show: Fig. 1a a perspective, partial view of a notching device according to the invention in a schematic representation; Fig. 1b a section of the notching device from Fig. 1a; Fig. 2 a top view of a notching device according to the invention during the machining of a workpiece; Fig. 3 a top view of a notching device according to the invention during the machining of a workpiece as well as a further workpiece that has already been machined, with an exemplary representation of various punching contours. Detailed description of the invention and drawing

[0035] Fig. Figure 1a shows a notching device 10 according to the invention in a partial, perspective view. The notching device 10 comprises a support 12, which is designed as a table. A first straight guide 14 and a second straight guide 15 are attached to the support 12. The straight guides 14, 15 are designed as rails 14', 15' and each has two guide webs 16. The support 12, designed as a table, has a support surface 12' for workpieces 18 to be processed (see Figure 1). Fig. 2 and Fig. 3) on.

[0036] A first punching tool 20 is arranged on or attached to the rail 14'. A second punching tool 21 is arranged on or attached to the rail 15'. Additionally, a support element 22 with a stop 23 for a workpiece 18 is arranged on or attached to the rail 14' of the first straight guide 14. The punching tools 20, 21, and the support element 22 are each displaceable on their respective rails 14' and 15' by means of a sliding bearing 24 that interacts with the guide webs 16. In this case, the displacement can be performed manually.

[0037] The punching tools 20, 21 are actuated by means of a respective pneumatic element 26. Pneumatic lines 28 from the pneumatic elements 26 lead to a common pedal 30, with which an operator can actuate both punching tools 20, 21 simultaneously.

[0038] Fig. Figure 1b shows a section of the notching device 10. Fig. 1a in a opposite Fig. Figure 1a shows an enlarged representation. Punching tools 20, 21 each have a C-shaped frame 32 with jaws 34 arranged therein.

[0039] Between the jaws 34 are knives (not visible) which, when the jaws 34 of a respective punching tool 20, 21 approach each other, cut out a section in the material of the workpiece 18 (see Fig. 2 and Fig. 3) can be generated. The jaws 34 (or one of the jaws 34 of a respective punching tool 20, 21) can further have recesses opposite the blades and / or pressure pins for generating markings on the workpiece 18. This is not shown in detail here. Compressing the jaws 34 of a respective punching tool 20, 21, and thus actuating it, is achieved by means of the pneumatic elements 26. In this case, the pneumatic elements 26 are double-acting pneumatic cylinders, so that the opening and closing of the jaws 34 can also be achieved with pneumatic assistance.

[0040] The punching tools 20, 21 can be secured to their respective rails 14', 15' by means of a locking device 36. The locking devices 36 can be operated manually and, when locked, prevent the punching tools 20, 21 from moving along their rails 14', 15'. When the locking devices 36 are not locked, the punching tools 20, 21 can be moved along their respective rails 14', 15' by means of the sliding bearing 24.

[0041] In the illustrated embodiment, both punching tools 20, 21 each have an angle stop 38 and a bar stop 40. The angle stops 38 and the bar stops 40 are each arranged on an outer side of the punching tools 20, 21 and are thus easily accessible to an operator of the notching device 10. The angle stops 38 can be deactivated by folding them over / folding them sideways, so that a workpiece 18 inserted between the jaws 34 can no longer strike them. In the illustration of the Fig. In 1b, the angle stop 38 of the first punching tool 20 is deactivated. The rod stop 40 there thus serves as the primary positioning aid. The angle stop 38 of the second punching tool 21 is active and, in the shown state, serves as the primary positioning aid for this tool. In the illustrated embodiment, the rod stops 40 are rigidly mounted. In alternative embodiments, the rod stops 40 can be adjusted, if necessary, by tilting the respective rod axis.

[0042] Fig. Figure 2 shows a top view of a notching device 10 according to the invention. Pneumatic lines 28 (cf. Fig. 1) are omitted for clarity. A workpiece 18 rests on a support surface 12' of a carrier 12, with two of its corners clamped between jaws 34 (see Fig. 2) a first punching tool 20 and a second punching tool 21 are positioned. The exact positioning of the workpiece 18 is ensured in particular by means of an angle stop 38 (see also Fig. 2) is fixed on each of the punching tools 20, 21. When the punching tools 20, 21 are actuated, material is removed (notched) from the workpiece 18 at the respective corners.

[0043] Workpiece 18 has a shape that could, for example, be found in a sheet metal part used for manufacturing wall cladding below a roof. To machine the two right-angled corners in the Fig. In the configuration shown in Figure 2, the first punching tool 20 is positioned along a first axis 42 of a first straight guide 14 such that it rests simultaneously on a second axis 43 of a second straight guide 15 of the second punching tool 21. In this way, the two corresponding corners of the workpiece 18 can be advantageously machined simultaneously. The workpiece 18 is supported by a support element 22 in the area where it projects beyond the first guide 14. The guides 14 and 15 are arranged on the carrier 12.

[0044] Fig. Figure 3 shows a top view of a notching device 10 according to the invention, in particular the notching device 10 made of Fig. 2. Notches had already been made at the right-angled corners of workpiece 18. Then, workpiece 18 was turned over to machine the remaining corners, as shown in Fig. Figure 3 illustrates this. A first punching tool 20 is positioned along a first axis 42 of a first straight guide 14 such that it engages the inclined edge of the workpiece 18 at the desired point. The positioning of the first punching tool 20 relative to the workpiece 18 is primarily determined by a rod stop 40 (see Figure 3). Fig. 2) determined on the first punching tool 20. An angle stop 38 (see Fig. 2) of the first punching tool 20 is deactivated. A support element 22 was positioned along the first straight guide 14 so that it can support the area of ​​the workpiece 18 above the guide 14.

[0045] It is evident that the positions of the first punching tool 20 and a second punching tool 21 must be selected depending on the length and inclination of the edges of the workpiece 18. The notching device 10 according to the invention enables simple yet precise positioning of the punching tools 20, 21 depending on the shape of the workpiece 18.

[0046] In Fig. Figure 3 shows an additional workpiece 18' lying on the support surface 12'. The workpiece 18' has already been provided with the necessary cutouts. It is evident that cutouts produced by the first punching tool 20 typically have different punching contours than cutouts produced by the second punching tool 21. Furthermore, it is evident that the cutouts of the additional workpiece 18' differ from the (visible) cutouts of the workpiece 18. This was achieved in particular by exchanging the blades or inserts with corresponding blade arrangements on jaws 34 (see Figure 3). Fig. 2) the punching tools 20, 21. It is also conceivable that punching tools 20, 21 can each be easily replaced as a whole at the notching device 10.

[0047] Based on a comparison of the figures in the drawing, the invention relates to a notching device 10 with two punching tools 20, 21, which can be moved independently of one another along a respective straight guide 14, 15. The straight guides 14, 15 typically run perpendicular to each other and are arranged, in particular, such that the punching tools 20, 21 can be arranged, among other things, in alignment with each other along one of the straight guides 14, 15. Reference symbol list 10 Release device 12 carriers 12' support surface 14 first straight-line leadership 14' rail 15 second straight line 15' rail 16 Guide bridge 18 workpieces 18' further workpiece 20 first stamping tool 21 second punching tool 22 Support element 23 attacks 24 Plain bearing 26 Pneumatic element 28 Pneumatic line 30 pedal 32 frames 34 Baking 36 Locking device 38 Angle stop 40 Rod stop 42 first axis 43 second axis QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 42 24 649 C2

[0003]

Claims

[1] Notching device (10) comprising a first punching tool (20) and a second punching tool (21) for targeted material removal from a workpiece (18, 18'), wherein the first punching tool (20) is displaceable along a first straight guide (14) and wherein the second punching tool (21) is displaceable along a second straight guide (15), wherein the first and the second punching tool (20, 21) are displaceable transversely, in particular perpendicularly, to each other. [2] Notching device (10) according to claim 1, wherein the first straight guide (14) has a first axis (42) and the second straight guide (15) has a second axis (43), wherein the axes (42, 43) are arranged such that the first punching tool (20) and the second punching tool (21) can be moved so that they can both be arranged on the first axis (42) or on the second axis (43). [3] Notching device (10) according to one of the preceding claims, wherein the first punching tool (20) and / or the second punching tool (21) are arranged on their respective straight guide (14, 15) by means of a sliding bearing (24). [4] Notching device (10) according to one of the preceding claims, wherein the first punching tool (20) and / or the second punching tool (21) have a locking device (36) for locking on their straight guide (14, 15). [5] A notching device (10) according to one of the preceding claims, wherein the notching device (10) has pneumatic elements (26) for actuating the punching tools (20, 21), in particular wherein the pneumatic elements (26) are coupled to a pedal (30). [6] Disengagement device (10) according to one of the preceding claims, wherein a support element (22) is arranged on the first straight guide (14) or the second straight guide (15). [7] Notching device (10) according to one of the preceding claims, wherein the first punching tool (20) and / or the second punching tool (21) has an angle stop (38) for positioning relative to the workpiece (18, 18'). [8] Disengagement device (10) according to claim 7, wherein the angle stop (38) can be deactivated, in particular by flipping it over. [9] Notching device (10) according to one of the preceding claims, wherein the first punching tool (20) and / or the second punching tool (21) has a rod stop (40) for positioning relative to the workpiece (18, 18'). [10] Notching device (10) according to claim 9, wherein the rod stop (40) is adjustable, in particular by tilting the rod axis to enable the desired positioning relative to the workpiece (18, 18'). [11] Disengagement device (10) according to one of the preceding claims, wherein the straight guides (14, 15) are arranged on a common support (12). [12] Release device (10) according to one of the preceding claims, wherein one of the straight guides (14, 15), preferably both straight guides (14, 15), is designed as a rail (14', 15'), in particular wherein the rail (14', 15') has two guide webs (16). [13] Release device (10) according to claim 12, characterized by , that the guide webs (16) of the at least one rail (14', 15') are arranged horizontally next to each other or vertically one above the other.

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