Swivel bending machine

Abstract

The invention relates to a pivoting bending machine (1) with a support table (17) for the workpieces to be bent in the area in front of the front face (18) of a workpiece-holding unit (3). A workpiece manipulator (23) is provided which is set up to pick up the workpieces to be bent starting from at least one of the table end areas (20, 21) and transport it parallel to the longitudinal direction (12) of the bending beam to a section in the area of ​​the longitudinal center (24) of the workpiece-holding unit (3). This workpiece manipulator (23) has a first clamping pillar (25) and a second clamping pillar (26) spaced apart from the first clamping pillar (25) in the longitudinal direction (12) of the bending beam for forming a clamping connection to the workpieces. At least one of the clamp pillars (25, 26) has a first stop surface for reference positioning the workpiece with respect to the longitudinal direction (12) of the bending beam, and a second stop surface for reference positioning the workpiece with respect to the depth direction (16) of the rotary bending machine (1).

Description

[Technical Field]

[0001] The present invention relates to a turning type bending machine that automatically or semi-automatically forms a plate-shaped workpiece that is initially flat. [Background technology]

[0002] Patent Document 1, owned by the same applicant, discloses a similar pivoting bending machine with a workpiece holder and a bending beam that is movable relative to the workpiece holder. To ensure that such bending machines can reliably process relatively large or heavy workpieces made of sheet metal, passive support tables for the workpieces or support tables with automatically drivable transport devices for the workpieces are also provided. These support tables are arranged in the area in front of the workpiece holder, so that in the depth direction of the pivoting bending machine, the support table, then the workpiece holder, and finally the bending beam are formed first. A problem with this prior art design is that, when the surface area of ​​the support table is large, it is relatively difficult for the operator to feed small workpieces to the central section of the workpiece holder. A known remedy for this problem is to assign a transport device to the support table, which transports the workpiece to be bent from the front area of ​​the support table to the rear of the depth direction to the workpiece holder.

[0003] The rotary bending machines known from this prior art have the drawback that feeding small workpieces is not very ergonomic for the operator and that proper positioning and accurate referencing of the workpiece to be processed can be difficult for the operator. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2017 / 181208(A1) Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention was to overcome the problems of the prior art and to provide a technical means by which even small workpieces can be fed and accurately positioned without any particular difficulty by an operator. [Means for solving the problem]

[0006] This object is achieved by a rotary bending machine as set forth in the claims.

[0007] The turning type bending machine according to the present invention comprises: The machine frame, a workpiece holding unit connected to the machine frame and having a first clamping tool and a movable second clamping tool cooperating therewith for fixing the workpiece to a horizontal work surface so that the portion of the workpiece to be bent can project toward the workpiece holding unit; a bending beam for bending a workpiece portion, movably supported on the machine frame and connected to an adjustment drive, the bending beam having a substantially C-shaped beam cross section and two bending tools extending in the longitudinal direction of the bending beam opposite each other across a horizontal center plane, between which the workpiece portion to be bent can be inserted; a support table for the workpiece to be bent, located in the area in front of the front face of the workpiece-holding unit, the front face representing the side of the workpiece-holding unit facing the bending beam, the support table having a table length measured parallel to the longitudinal direction of the bending beam between the table end areas on both sides of the support table of at least 1.5 meters, in particular at least 2 meters, and a table depth measured parallel to the horizontal working surface and perpendicular to the front face of the support table of at least 1.0 meter, in particular at least 1.5 m, the depth direction of the rotary bending machine being determined by the serial order of the support table, the workpiece-holding unit and the bending beam; a workpiece manipulator configured to pick up a workpiece to be bent starting from at least one of the table end areas and to transport it parallel to the longitudinal direction of the bending beam to a section in the longitudinal center area of ​​the workpiece holding unit, the workpiece manipulator having a first clamping mechanism for forming a clamping connection with the workpiece; Clamping Tongs and a second spaced apart from this in the longitudinal direction of the bending beam. Clamping Tongs and at least a first Clamping Tongs The workpiece manipulator has a first stop surface for setting the reference position of the workpiece relative to the longitudinal direction of the bending beam, and a second stop surface for setting the reference position of the workpiece relative to the depth direction of the rotary bending machine.

[0008] By referencing a workpiece, it is to be understood that the workpiece is positioned or aligned with respect to a zero or reference point established by the motion control of the rotary bending machine. Such a zero or reference point for the workpiece to be machined is sometimes called the start point and is usually in the working plane.

[0009] The rotary bending machine according to the present invention offers the advantage that the operator can feed the workpiece to be machined into the workpiece manipulator starting from one of the two side areas of the support table, and then the workpiece can be automatically transferred to the central section of the workpiece holding unit, which allows the operator to feed both small and relatively heavy workpieces in an ergonomic way. Clamping Tongs Since the bend table is highly visible and easily accessible to the operator, the operator can always accurately and easily check the workpiece and feed it to the designated workpiece manipulator. In particular, the operator can quickly and easily check that the workpiece to be bent is in the planned reference position.

[0010] It is also advantageous that the workpiece manipulator can enter and exit the internal region enclosed by the C-shaped cross section of the bending beam by a guide device extending parallel to the longitudinal direction of the bending beam. This allows the workpiece manipulator to be designed compactly. Furthermore, by linking with the bending beam, the workpiece manipulator can be easily moved vertically or in the height direction.

[0011] Furthermore, the workpiece manipulator can be moved beyond at least one longitudinal end of the bending tool by a guide device. Clamping Tongs , and in particular their stop faces, are significantly easier to see.

[0012] Furthermore, the first and second Clamping Tongs are fixed on one translation adjustment shaft each, and these adjustment shafts are the first and second Clamping Tongs It may be useful if a workpiece manipulator is provided for controlled positioning along the depth direction of the bending machine. This allows for fast and technically reliable positioning of the workpiece to be bent in the depth direction of the rotary bending machine. In particular, the workpiece can be transferred from the workpiece manipulator to the workpiece holding device taking into account the target position of the first bent edge.

[0013] Furthermore, the first and second Clamping Tongs is, each Clamping Tongs The clamping action on the workpiece can be performed alternately or independently of each other. Clamping Tongs It is also possible to use only one of the clamping actions. Clamping Tongs Pneumatic operation of the present invention offers a good compromise between technical simplicity, economy and functional availability.

[0014] Furthermore, the first and second Clamping TongsEach of the clamping devices has a wedge-shaped tapered working section, and an adjusting piston that can be extended from the working cylinder can be inserted into the working section with a tensioning action. This allows a high, reproducible clamping force to be generated on the workpiece even with a pneumatically operated working cylinder.

[0015] According to another embodiment, the first and second adjusting shafts each have one electric motor and one second Clamping Tongs In this way, it is possible to have a threaded spindle connected to an electric motor for the translational movement of the workpieces in the depth direction of the bending machine or the workpiece holding unit. Clamping Tongs Alternatively, accurate and repeatable positioning of the workpiece being transported can be achieved.

[0016] Furthermore, the first or second Clamping Tongs , or the first and second Clamping Tongs It may be useful if the manipulator is configured to grip the side edge of the workpiece that extends parallel to the longitudinal direction of the bending beam and is located closest to the bending beam. This allows the rear limiting edge of the workpiece to be used for gripping and referencing, relative to the user's position and the depth direction of the rotary bending machine. This also improves ergonomics and the visibility of the workpiece relative to the manipulator. As a result, the operator can achieve a fast, uncomplicated, and highly repeatable positioning and transport process for the workpiece manipulator.

[0017] Furthermore, a first stop surface provided for referencing or positioning the workpiece relative to the longitudinal direction of the bending beam extends perpendicularly and transversely to the longitudinal direction of the bending beam, and the first and second Clamping Tongs This can advantageously be achieved by positioning the first and / or second clamping portions outside the clamping portion. Clamping Tongs the stopping or reference setting function of the first and / or second Clamping Tongs This allows the clamping function to be utilized regardless of whether it is in an activated or deactivated state.

[0018] Furthermore, the first and / or second Clamping Tongs The clamping device may include a non-pivotable lower support finger and an upper clamping finger, the upper clamping finger being pivotally supported relative to the lower support finger about a horizontal pivot axis, thereby achieving accurate and reliable positioning or referencing of the workpiece in the vertical or height direction, and thereby achieving stable and functionally reliable holding and clamping of a planned or properly positioned workpiece.

[0019] The first and second stop surfaces for the planned positioning and alignment of the workpiece to be machined are directly connected to the first and second Clamping Tongs In this case, the first stop surface for positioning the workpiece relative to the longitudinal direction of the bending beam is formed on the first and second Clamping Tongs The second stop surface for relatively positioning the workpiece in the depth direction of the bending machine is preferably formed on the first and second clamping fingers fixed relative to the pivotable clamping fingers. Clamping Tongs Preferably, the support fingers are formed on the support fingers.

[0020] According to a particular embodiment, the workpiece manipulator has both Clamping Tongs The first stop surface is used to reference position the workpiece in the longitudinal direction of the bending beam on only one of the two. Clamping Tongs It is possible to set only the other of the two to use a clamping action on the workpiece. Clamping Tongs On the other hand, for example, Clamping Tongs is responsible for setting the standard for the control technology zero point, while e.g. Clamping Tongs By dividing the reference setting function and the holding or clamping function in this way, it becomes easier for the operator to supply a sheet-like workpiece or a plate-like workpiece to the work manipulator.

[0021] In particular, it is advantageous if a support for an additional manipulator projects vertically from the table surface of the support table, the additional manipulator having a rotary stamp rotatable about a vertical axis for rotating the workpiece to be machined about the vertical axis, the support projecting vertically in the longitudinal center or in the region of the longitudinal center of the support table. This allows workpieces to be formed with angular or perpendicular bent edges to be automatically rotated about their vertical axes. The limited accessibility or approachability of the workpiece holding unit due to such an additional manipulator can be compensated for by the fact that the workpiece manipulator can be positioned or fed on one of the two longitudinal sides of the support table.

[0022] For a better understanding of the invention, it will be explained in more detail with the aid of the following figures.

[0023] The figures are shown in simplified schematic and exemplary representations, respectively. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view of a turning type bending machine with a support table for a workpiece to be machined located in front. [Figure 2] FIG. 2 is a schematic side view of the support table, workpiece holding unit, and bending beam of the turning bending machine shown in FIG. [Figure 3] FIG. 3 is a detailed view of the turning bending machine and the workpiece manipulator shown in FIG. [Figure 4] FIG. 4 is a diagram of an operator of the turning-type bending machine handing over a plate-shaped workpiece to a workpiece manipulator of the turning-type bending machine. [Figure 5] 5 is a diagram of the first and second clamping tongs of the workpiece manipulator for the turning bending machine shown in FIG. 1. FIG. [Figure 6] 6 is a view showing the left clamping tongue of FIG. 5 taken along line VI-VI of FIG. [Figure 7]7 is a view showing the left clamping tongue of FIG. 5 taken along line VII-VII of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0025] It should be noted at the outset that the same elements in the different embodiments described are designated by the same reference numerals or names. In this case, the disclosure contained in the entire description can be transferred to the same elements having the same reference numerals or names. Positional terms selected in the description, such as upper, lower, side, etc., are also based on the displayed figures directly described, and these positional terms will be applied mutatis mutandis to the new positions if the positions are changed.

[0026] 1 to 4 show an embodiment of a rotary bending machine 1 for forming a workpiece 2 from a plate material, the details of which are shown in FIGS. 2 to 4. The machine includes at least one machine frame (not shown in detail), in particular a support structure for the individual machine elements or machine units. A workpiece holding unit 3 connected to the machine frame is therefore provided for clamping or holding the plate-shaped workpiece 2 during forming. This workpiece holding unit 3 includes a first clamping tool 4 that is normally fixed in position and a second clamping tool 5 that cooperates with the first clamping tool 4 and is movable relative to the first clamping tool 4 for clamping the workpiece 2 to a horizontal work surface 6. The workpiece 2 to be processed is clamped or held in place so that the workpiece portion 7 to be bent projects tongue-like relative to the workpiece holding unit 3.

[0027] A bending beam 8 is further supported on the machine frame, which is connected to a controllable adjusting drive 9 and is thereby supported for movement relative to the machine frame. The bending beam 8 is used to bend the workpiece parts 7 protruding towards the workholding unit 3 vertically upwards and / or vertically downwards.

[0028] The bending beam 8 has a substantially C-shaped beam cross section 10 and is provided with two bending tools 13, 14 extending in the longitudinal direction 12 (FIG. 1) of the bending beam 8 or the rotary bending machine 1, facing each other across a horizontal center plane 11. A workpiece portion 7 of the workpiece 2 to be bent can be inserted between the lower bending tool 13 and the upper bending tool 14. By moving the bending beam 8 relatively in the height direction 15 and / or depth direction 16 of the rotary bending machine 1, the workpiece portion 7 can be bent upward or downward, thereby achieving the desired shaping of the workpiece 2.

[0029] The turning bending machine 1 further has a bending machine in the area in front of the front face 18 of the workpiece holding unit 3. The workpiece holding unit 3 includes a support table 17 for the workpiece 2 to be machined. , the side of the work-holding unit 3 facing away from the bending beam 8. The holding table 17 and the bending beam 8 are arranged opposite to each other with the workpiece holding unit 3 in between. The support table 17 is provided with two tables on both sides parallel to the longitudinal direction 12 of the bending beam 8. The table length 19 measured between the support end regions 20, 21 is 1.5 m or more. The cable 17 is the table measured parallel to the horizontal work surface 6 and perpendicular to the front surface 18. The cable depth 22 is 1.0 meter or more. The depth direction 16 of the turning type bending machine 1 is The support table 17, the workpiece holding unit 3 and the bending beam 8 define a serial sequence. Therefore, the horizontal extension of the support table 17 is very large, so that the work the work-holding unit 3 or the edge of the support table 17 closest to the work-holding unit 3 The support table 17 is a work holding unit. The support table 17 extends directly or substantially without a gap to the workpiece support 3. The unit extends to the immediate vicinity of the holding unit 3, so that the worker does not have to leave any space between them. It is impossible to find or enter the space.

[0030] The table length 19 of the support table 17 preferably corresponds to at least the maximum setup length of the workholding unit 3. Typically, the table length 19 is greater than the maximum setup length of the workholding unit 3 or greater than the maximum setup length of the bending tools 13, 14. In this case, all length specifications in this specification refer to a direction parallel to the longitudinal direction 12 of the bending beam 8.

[0031] The rotary bending machine 1 further includes a workpiece manipulator 23. This workpiece manipulator 23 is configured to pick up a workpiece 2 to be bent, in particular a flat sheet material blank, starting from at least one of the two table edge areas 20, 21, for example starting from the right table edge area 21. The workpiece manipulator 23 is further configured or arranged to transport the picked-up or gripped workpiece 2 parallel to the longitudinal direction 12 of the bending beam 8 to the workpiece holding unit 3 or to the area of ​​the longitudinal center 24 of the bending beam 8 (Figures 1 and 2). The workpiece 2 to be processed is generally clamped in the area of ​​the longitudinal center 24 of the workpiece holding unit 3 and is subsequently subjected to a forming force by at least one of the bending tools 13, 14.

[0032] The workpiece manipulator 23 has at least one first clamping element 24 for forming a clamping connection with the workpiece 2 to be machined. Clamping Tongs 25 and a second spaced apart from it in the longitudinal direction 12 of the bending beam 8. Clamping Tongs 26. Clamping Tongs The clamping functions of 25, 26 are preferably selectively utilized, i.e., both as illustrated in FIG. Clamping Tongs Only one of 25 and 26 is used. Clamping Tongs 25 or alternatively a second Clamping TongsIt is sandwiched between 26.

[0033] Furthermore, as best seen in FIG. 4, at least the first Clamping Tongs 25, but preferably both Clamping Tongs 25, 26 have first stop surfaces 27, 28 for referencing the workpiece 2 to be machined relative to the longitudinal direction 12 of the bending beam 8, in particular for reference positioning. Clamping Tongs 25, preferably both Clamping Tongs The workpieces 25 and 26 have second stop surfaces 29 and 30 for reference setting of the workpiece 2 with respect to the depth direction 16 of the turning type bending machine 1 .

[0034] By manually abutting or stopping the workpiece 2 to be machined against at least three of the stop surfaces 27 or 28, 29 and 30, the workpiece 2 can be accurately positioned relative to a zero point or reference point of the control device 31 of the rotary bending machine 1 and accurately aligned (oriented) relative to a reference line or reference direction. Subsequent operation steps on the workpiece 2, in particular the transport and bending steps, can be based on this reference point or reference line. The loading surface for the workpiece 2 that is fed to the workpiece manipulator 23 is also predefined or known, so that the alignment and position of the workpiece 2 to be processed in three-dimensional space are defined for the control device 31. Subsequent operation steps on the correspondingly aligned and positioned workpiece 2 are initiated or controlled by the control device 31 in a partially or fully automated manner.

[0035] As can be best seen in Figures 2 to 4, the workpiece manipulator 23 can be moved in an automated or controlled manner into the interior region 33 of the bending beam 8, which is surrounded by the C-shaped beam cross section 10, by means of a guide device 32 extending parallel to the longitudinal direction 12 of the bending beam 8. In particular, the workpiece manipulator 23 can be moved in an automated or controlled manner into the interior region 33 of the bending beam 8, which is surrounded by the C-shaped beam cross section 10. Clamping Tongs 25, 26, as illustrated in Figures 3 and 4, can be moved beyond at least one longitudinal end 34 of the first or second clamping tool 4, 5 or bending tool 13, 14 by means of a guide device 32 and at least one adjusting drive, not shown in detail.

[0036] Work manipulator 23 Clamping Tongs The first and second embodiments are shown in FIG. Clamping Tongs The first and second adjustment shafts 25 and 26 are fixed to respective translation adjustment shafts 35 and 36. Clamping Tongs 25, 26 in the depth direction 16 of the rotary bending machine 1. The adjusting or positioning operations of the adjusting axes 35, 36 can be performed independently of one another or can be decoupled from one another. The maximum available adjustment distance of the adjusting axes 35, 36 can be simply 30 mm to 100 mm, in particular about 50 mm.

[0037] 1st and 2nd Clamping Tongs 25 and 26 are Clamping Tongs The valves 25, 26 have pneumatically operable actuating cylinders 37, 38 for closing the valves 25, 26. The actuating cylinders 37, 38 can be designed as single-acting cylinders. Clamping Tongs 25, 26 may each have a return spring 39, as shown in FIG. 6, to return them to their open or initial positions. Clamping Tongs 25, 26 may each have an internally tapered wedge-shaped working section 40 for controllable closure. Adjusting pistons 41 extendable from actuating cylinders 37, 38. Clamping Tongs To activate 25, 26, they can be inserted with tension into working part 40. Such an active clamping or closed position is shown in FIG.

[0038] No. 1 Clamping Tongs 25 is preferably the second Clamping Tongs 26 also has non-pivotable lower support fingers 42, 43 and upper clamping fingers 44, 45. The upper clamping fingers 44, 45 are supported for pivotal movement relative to the lower support fingers 42, 43 about horizontal pivot axes 46, 47.

[0039] 1st and 2nd Clamping TongsIn order to translate 25, 26 along the depth direction 16 of the rotary bending machine 1, the first and second adjustment shafts 35, 36 have electric motors 48, 49 and threaded spindles 50, 51 connected to the electric motors 48, 49, respectively.

[0040] As can be seen best from FIGS. 1 to 4, the first and second Clamping Tongs The clamps 25, 26 extend parallel to the longitudinal direction 12 of the bending beam 8 and are configured to grip the side edge 52 of the workpiece 2 located closest to the bending beam 8.

[0041] Clamping Tongs The first stop surfaces 27, 28 of the clamping members 25, 26 are provided for referencing or referencing the workpiece 2 with respect to the longitudinal direction 12 of the bending beam 8. The first stop surfaces 27, 28 extend perpendicular to the bending beam 8 and transversely to the longitudinal direction 12. The first stop surfaces 27, 28 are located on the outside of the clamping members 53, 54, respectively. Clamping Tongs Preferably, they are positioned outside the horizontally extending clamping surfaces of 25, 26. The first stop surfaces 27, 28 and the second stop surfaces 29, 30 may also extend in a cambered or rounded manner, as illustrated.

[0042] The work manipulator 23 is Clamping Tongs Only one of the stops 25 or 26 utilizes the first stop surface 27 or 28 to reference the workpiece 2 in the longitudinal direction 12 of the bending beam 8, and both Clamping Tongs The other of 26 or 25 can be set to use only the clamping action on the workpiece 2. Clamping Tongs Only one of 25 and 26 is responsible for setting the reference point for the zero point or origin of work 2, and the other Clamping Tongs The workpieces 25 and 26 clamp or hold the workpiece 2 so that it can be transported by the workpiece manipulator 23 along the longitudinal direction 12 and the depth direction 16 .

[0043] As can be seen in FIG. 1 , the support 56 of the additional manipulator 57 can project vertically from the horizontal table surface 55 of the support table 17. This additional manipulator 57 has a rotary stamp 58 that can rotate about a vertical axis in order to rotate the workpiece 2 to be machined about the vertical axis. The rotary stamp 58 is supported on a substantially horizontal support arm that extends from the support 56 towards the workpiece-holding unit 3. The support 56 projects vertically at or in the region of the longitudinal center 24 of the support table 17. This makes it difficult to feed the workpiece 2 into the rotary bending machine 1 starting from the longitudinal side of the support table 17 that is opposite or furthest from the workpiece-holding unit 3. A solution to this problem can be provided by the workpiece manipulator 23 described above.

[0044] The present invention is not limited to the specifically illustrated embodiments. The scope of protection is determined by the claims. However, the specification and drawings are to be used to interpret the claims. Individual features or combinations of features from the various illustrated and described embodiments may constitute independent inventive solutions. The problems underlying these independent inventive solutions can be gleaned from this specification.

[0045] Finally, as a matter of formality, in order to make the structure easier to understand, some of the elements are not shown to scale and / or are enlarged and / or reduced in size. The present invention has the following aspects (configurations). [Aspect 1] A rotary bending machine (1), The machine frame, a workpiece holding unit (3) connected to the machine frame, the workpiece holding unit (3) having a first clamping tool (4) for fixing the workpiece (2) to a horizontal work surface (6) so that a workpiece portion (7) to be bent can protrude towards the workpiece holding unit (3) and a movable second clamping tool (5) cooperating with the first clamping tool (4); a bending beam (8) for bending a workpiece portion (7) movably supported on the machine frame and connected to an adjusting drive (9), the bending beam (8) having a substantially C-shaped beam cross section (10) and two bending tools (13, 14) extending in a longitudinal direction (12) of the bending beam (8) opposite each other across a horizontal center plane (11), between which the workpiece portion (7) of the workpiece (2) to be bent can be inserted; a support table (17) for the workpiece (2) to be bent, located in an area in front of a front face (18) of the workpiece-holding unit (3), the front face (18) representing the side of the workpiece-holding unit (3) facing the bending beam (8), the support table (17) having a table length (19) measured parallel to the longitudinal direction (12) of the bending beam (8) between its two table end areas (20, 21) of at least 1.5 meters, the support table (17) having a table depth (22) measured parallel to the horizontal work surface (6) and perpendicular to the front face (18) of at least 1.0 meter, the depth direction (16) of the rotary bending machine (1) being determined by the serial order of the support table (17), the workpiece-holding unit (3) and the bending beam (8); a workpiece manipulator (23) configured to pick up a workpiece to be bent starting from at least one of the table end areas (20, 21) and to transport it parallel to the longitudinal direction (12) of the bending beam (8) to a section in the area of ​​the longitudinal center (24) of the workpiece holding unit (3); In a turning bending machine (1) comprising: The workpiece manipulator (23) has a first clamping tong (25) and a second clamping tong (26) spaced from the first clamping tong (25) in the longitudinal direction (12) of the bending beam (8) for forming a clamped connection with the workpiece; A rotary bending machine (1) characterized in that at least one of the clamping tongs (25, 26) has a first stop surface (27, 28) for determining a reference position of the workpiece relative to the longitudinal direction (12) of the bending beam (8), and a second stop surface (29, 30) for determining a reference position of the workpiece relative to the depth direction (16) of the rotary bending machine (1). [Aspect 2] The rotary bending machine (1) described in aspect 1 is characterized in that the work manipulator (23) can enter and exit the internal area (33) surrounded by the C-shaped beam cross section (10) of the bending beam (8) by a guide device (32) extending parallel to the longitudinal direction (12) of the bending beam (8). [Aspect 3] The swivel bending machine (1) according to aspect 2, characterized in that the workpiece manipulator (23) can be moved beyond at least one longitudinal end (34) of the first clamping tool (4) or the second clamping tool (5), or the lower bending tool (13) or the upper bending tool (14) by the guiding device (32). [Aspect 4] The turning-type bending machine (1) according to any one of aspects 1 to 3, characterized in that the first clamping tong (25) and the second clamping tong (26) are each fixed on one translation adjustment shaft (35, 36), and the translation adjustment shaft (35, 36) is provided to control and position the first clamping tong (25) and the second clamping tong (26) along a depth direction (16) of the turning-type bending machine (1). [Aspect 5] The rotary bending machine (1) according to any one of aspects 1 to 4, wherein the first clamping tong (25) and the second clamping tong (26) each include a pneumatically operable actuating cylinder (37, 38) for closing each clamping tong (25, 26). [Aspect 6] The rotary bending machine (1) described in aspect 5 is characterized in that the first clamping tong (25) and the second clamping tong (26) each have a wedge-shaped, tapered operating portion (40), and an adjustment piston (41) that can be advanced from the operating cylinder (37, 38) can be inserted into the operating portion (40) with a pushing action. [Aspect 7] The rotary bending machine (1) according to any one of aspects 4 to 6, characterized in that the first adjustment shaft (35) and the second adjustment shaft (36) each have one electric motor (48, 49) and one threaded spindle (50, 51) connected to the electric motor (48, 49) for translational movement of the first clamping tong (25) and the second clamping tong (26). [Aspect 8] The rotary bending machine (1) according to any one of aspects 1 to 7, characterized in that the first clamping tongs (25) or the second clamping tongs (26), or the first clamping tongs (25) and the second clamping tongs (26), extend parallel to the longitudinal direction (12) of the bending beam (8) and are configured to grip the side edge portion (52) of the workpiece (2) arranged closest to the bending beam (8). [Aspect 9] The rotary bending machine (1) according to any one of aspects 1 to 8, characterized in that the first stop surfaces (27, 28) provided for setting the reference position of the workpiece (2) relative to the longitudinal direction (12) of the bending beam (8) extend perpendicularly and transversely to the longitudinal direction (12) of the bending beam (8) and are positioned outside the clamping portions (53, 54) of the first clamping tongs (25) and the second clamping tongs (26). [Aspect 10] The rotary bending machine (1) according to any one of aspects 1 to 9, wherein the first clamping tong (25) and / or the second clamping tong (26) includes non-rotatable lower support fingers (42, 43) and upper clamp fingers (44, 45), and the upper clamp fingers (44, 45) are supported so as to be rotatable relative to the lower support fingers (42, 43) about horizontal pivot axes (46, 47). [Aspect 11] The turning bending machine (1) according to any one of aspects 1 to 10, characterized in that the work manipulator (23) is configured to use the first stop surface (27, 28) to reference the work (2) in the longitudinal direction (12) of the bending beam (8) with only one of the clamping tongs (25, 26), and to use the other of the clamping tongs (26, 25) solely for clamping the work (2). [Aspect 12] The turning bending machine (1) according to any one of aspects 1 to 11, characterized in that a support (56) of an additional manipulator (57) projects vertically from the table surface (55) of the support table (17), the additional manipulator (57) has a rotary stamp (58) rotatable about a vertical axis for rotating the workpiece (2) to be machined about the vertical axis, and the support (56) projects vertically at the longitudinal center (24) of the support table (17) or in the region of the longitudinal center (24). [Explanation of symbols]

[0046] 1. Swivel bending machine 2 Work 3 Work holding unit 4. First clamping tool 5 Second clamping tool 6 Horizontal work surface 7 Work part 8 Bending Beam 9 Adjustment Drive 10 Beam cross section 11 Horizontal center plane 12 Longitudinal direction 13 Bending tools 14 Bending tools 15 Height 16 Depth direction 17 Support Table 18 Front 19 Table Length 20 Table Edge Area 21 Table Edge Area 22 Table depth 23 Work Manipulator 24 longitudinal center 25 No. 1 Clamping Tongs 26 No. 2 Clamping Tongs 27 1st stop surface 28 1st stop plane 29 2nd stop plane 30 2nd stop plane 31 Control device 32 Guidance device 33 Internal area 34 Longitudinal end 35 Adjustment axis 36 Adjustment axis 37 Working cylinder 38 Working Cylinder 39 Return spring 40 Operating unit 41 Adjustment piston 42 Support Finger 43 Support Finger 44 Clamp Finger 45 Clamp Finger 46 Swivel axis 47 Swivel Axis 48 Electric Motor 49 Electric Motor 50 threaded spindle 51 Threaded Spindle 52 Side edge 53 Clamp section 54 Clamp section 55 Table surface 56 Support 57 Additional Manipulators 58 Rotating Stamp

Claims

1. A rotary bending machine (1), The machine frame, a workpiece holding unit (3) connected to the machine frame, the workpiece holding unit (3) having a first clamping tool (4) for fixing the workpiece (2) to a horizontal work surface (6) so that a workpiece portion (7) to be bent can protrude beyond the workpiece holding unit (3) and an adjustable second clamping tool (5) cooperating with the first clamping tool (4); a bending beam (8) for bending a workpiece (7) movably supported on the machine frame and connected to an adjusting drive (9), the bending beam (8) having a substantially C-shaped beam cross section (10) and two bending tools (13, 14) extending in the longitudinal direction (12) of the bending beam (8) opposite each other across a horizontal central plane (11), between which the workpiece (7) of the workpiece (2) to be bent can be inserted; a support table (17) for the workpiece (2) to be bent, located in an area in front of a front face (18) of the workpiece-holding unit (3), the front face (18) representing the side of the workpiece-holding unit (3) facing the bending beam (8), the support table (17) having a table length (19) measured parallel to the longitudinal direction (12) of the bending beam (8) between its two table end areas (20, 21) of at least 1.5 meters, the support table (17) having a table depth (22) measured parallel to the horizontal work surface (6) and perpendicular to the front face (18) of at least 1.0 meter, the depth direction (16) of the rotary bending machine (1) being determined by the serial order of the support table (17), the workpiece-holding unit (3) and the bending beam (8); a workpiece manipulator (23) configured to pick up a workpiece to be bent starting from at least one of the table end areas (20, 21) and to transport it parallel to the longitudinal direction (12) of the bending beam (8) to a section in the area of ​​the longitudinal center (24) of the workpiece holding unit (3); In a rotary bending machine (1) comprising: The workpiece manipulator (23) has a first clamping tong (25) and a second clamping tong (26) spaced apart from the first clamping tong (25) in the longitudinal direction (12) of the bending beam (8) for forming a clamped connection with the workpiece; At least one of the clamping tongs (25, 26) has a first stop surface (27, 28) for determining a reference position of the workpiece relative to the longitudinal direction (12) of the bending beam (8) and a second stop surface (29, 30) for determining a reference position of the workpiece relative to the depth direction (16) of the rotary bending machine (1), As a result, the operator can feed the workpiece (2) to be processed to the workpiece manipulator (23) starting from one of the side areas of the support table (17), after which the workpiece (2) is automatically transported to the longitudinal center (24) of the workpiece holding unit (3).

2. 2. The rotary bending machine (1) according to claim 1, characterized in that the workpiece manipulator (23) can enter and exit the internal area (33) surrounded by the C-shaped beam cross section (10) of the bending beam (8) by means of a guide device (32) extending parallel to the longitudinal direction (12) of the bending beam (8).

3. 3. The rotary bending machine (1) according to claim 2, characterized in that the workpiece manipulator (23) can be moved beyond at least one longitudinal end (34) of the first clamping tool (4) or the second clamping tool (5), or the lower bending tool (13) or the upper bending tool (14) by means of the guiding device (32).

4. The rotary bending machine (1) according to any one of claims 1 to 3, characterized in that the first clamping tong (25) and the second clamping tong (26) are each fixed on one translation adjustment shaft (35, 36), and the translation adjustment shaft (35, 36) is provided for controlling and positioning the first clamping tong (25) and the second clamping tong (26) along the depth direction (16) of the rotary bending machine (1).

5. The rotary bending machine (1) according to any one of claims 1 to 3, characterized in that the first clamping tong (25) and the second clamping tong (26) each include a pneumatically operable actuating cylinder (37, 38) for closing each clamping tong (25, 26).

6. 6. The rotary bending machine (1) according to claim 5, characterized in that the first clamping tong (25) and the second clamping tong (26) each have a wedge-shaped tapered active portion (40), and an adjustment piston (41) extendable from the actuating cylinder (37, 38) can be inserted into the active portion (40) with a tensioning action.

7. 5. The rotary bending machine (1) according to claim 4, characterized in that the first adjusting shaft (35) and the second adjusting shaft (36) each have one electric motor (48, 49) and one threaded spindle (50, 51) connected to the electric motor (48, 49) for translational movement of the first clamping tongue (25) and the second clamping tongue (26).

8. The rotary bending machine (1) according to any one of claims 1 to 3, characterized in that the first clamping tong (25) or the second clamping tong (26), or the first clamping tong (25) and the second clamping tong (26), extend parallel to the longitudinal direction (12) of the bending beam (8) and are configured to grip a side edge (52) of the workpiece (2) arranged closest to the bending beam (8).

9. 4. The rotary bending machine (1) according to claim 1, wherein the first stop surfaces (27, 28) provided for setting the reference position of the workpiece (2) relative to the longitudinal direction (12) of the bending beam (8) extend perpendicularly and transversely to the longitudinal direction (12) of the bending beam (8) and are positioned outside the clamping portions (53, 54) of the first clamping tongs (25) and the second clamping tongs (26).

10. The rotary bending machine (1) according to any one of claims 1 to 3, characterized in that the first clamping tong (25) and / or the second clamping tong (26) include non-rotatable lower support fingers (42, 43) and upper clamp fingers (44, 45), and the upper clamp fingers (44, 45) are supported so as to be rotatable relative to the lower support fingers (42, 43) about horizontal pivot axes (46, 47).

11. The workpiece manipulator (23) is configured to use the first stop surface (27, 28) to reference the workpiece (2) in the longitudinal direction (12) of the bending beam (8) with only one of the clamping tongs (25, 26), and to use the other of the clamping tongs (26, 25) exclusively to clamp the workpiece (2).

12. 4. The rotary bending machine (1) according to claim 1, wherein a support (56) of an additional manipulator (57) projects vertically from the table surface (55) of the support table (17), the additional manipulator (57) having a rotary stamp (58) rotatable about a vertical axis for rotating the workpiece (2) to be machined about the vertical axis, and the support (56) projects vertically at the longitudinal center (24) of the support table (17) or in the region of the longitudinal center (24).

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