EP0872292B1 - Machine for bending of elongate members such as tubes, bars or profiles - Google Patents

Description

The above invention relates to a machine for bending elongated parts, such as pipes, rods or profiles with one Base frame that holds a sliding carriage, the one with a collet to carry out a controlled Equipped with rotation and displacement movement of the workpiece and accommodates a bending head (see e.g. EP-A-0 417 703).

It is known that elongated material such as e.g. Tube, those for the transport of liquids, vapors or gases serve in devices and systems, sometimes very much has complex shapes.

These complex forms of the components are necessary to achieve this material extending in the longitudinal direction to the course to adapt between the devices to be connected.

The longitudinally extending material is in usually in the form of straight rods or tubes or in the form of material wound on drums expelled.

The rods or wraps are cut into individual sections cut to the desired length and then in Bending machines deformed.

The known bending machines of the type mentioned consist of a machine frame, which one on a plate movable carriage, which has a collet and one Carries sled with a bending head.

The collet is designed such that it Grip the workpiece in the form of a rod or a tube and move the workpiece relative to its longitudinal axis or can rotate.

The movable carriage is like this on the machine frame mounted that sliding the carriage in Transverse direction with respect to the longitudinal axis of the collet small steps is possible.

This known embodiment of a bending machine enables the die provided in the bending head opposite the axis of the workpiece, in the form of a rod or align a pipe to the workpiece in the Introduce die to then bend perform.

The provision of a device for moving the Sliding in the cross direction of the collet leads to a extremely space-consuming design of the bending machine, especially on the sides of the collet.

The space-consuming design of the machine leads to Restrictions on the extension of the bend Applies to workpieces in the room

The space-consuming design of the machine also leads to longer processing times, because it becomes necessary Workpiece between the individual machining processes span and realign to avoid a Striking the workpiece on machine components occurs during the bending process.

The well-known bending machines are also currently associated complex manipulators, e.g. programmable Robots for feeding and automatic Remove or transfer the workpiece to others Processing units serve.

The operation, especially the programming of these Manipulators are particularly complex.

The need for manipulation and especially that precise handling of the workpiece is still ensured by the The fact that the bending machine with a high Number of cycles to be operated.

At the same time, the workpiece must be avoided Execution of the bending processes and after approval of the Work piece disorderly on the floor of the machine picks up, falls. In particular, it must be avoided that the Workpiece does not fall on assemblies of the bending machine what interrupt the execution of further processing operations would or if the workpiece fell off directly the floor, undergoes undesirable deformations that to reduce the quality of the finished product would lead.

The need for a manipulator to load and To be able to automatically unload the workpieces, complicates the use of the bending machine and leads to everyone Case for an increase in the cost of operating the Bending machine, if this e.g. in one automatically working production line is used in the too other processing operations are to be carried out such as e.g. chamfering the workpiece ends, signing the Workpieces, cutting a thread, creating Holes or the attachment of connecting nuts.

Object of the above invention is the disadvantages of Avoid prior art and especially the Opportunities to create workpieces in the form of bars, Profiles or tubes without the use of any other Handling devices e.g. for dispensing or that Removing the workpiece from the bending machine enable and suggest a machine at the same time, which is simple in structure and a small number of too has controlling axes, at the same time a Reduction of the lateral space requirement of the bending machine is achieved to also work with workpieces simplify complex shape and larger dimensions.

Another object of the invention is to provide several Machining operations using a single Perform bending machine.

The object of the invention is achieved by a machine with the characteristics of claim 1 solved.

To perform the necessary manipulations using the To further improve the bending head is the wave of one slidable car included in the base frame of the Machine is arranged, the sliding carriage with Drive and control devices are operatively connected.

To carry out the sliding movement of the carriage the plate, this plate can guide rails for the Have sledge, as well as a drive spindle with a controllable servo motor is connected, the Drive spindle is operatively connected to a nut that is firmly arranged on the sled.

To perform a swivel movement, the plate opposite the machine frame, it can be provided that the shaft rises from the plate, whereby Receiving devices and rotating devices with the shaft connect the base frame of the machine, furthermore, a Device for adjusting the pivoting movement of the Shaft provided.

To control the pivoting movement of the plate, a controllable reduction gear can be provided by the Base frame of the machine is included; on the shaft a gear is arranged, the reduction gear using a pinion with the gear wheel of the shaft connected is.

To perform various machining operations on the in the To be able to carry out the collet held workpiece a variety of processing units on the slide to be ordered.

The advantages of the above invention are in essential to see in that workpieces, such as rods or pipes directly through the bending head on the sled the bending machine is arranged can be handled and feeding and removing the workpieces from the Bending machine automatically, without the special provision Manipulators, reducing production times becomes feasible.

Handling for unloading the machined components, using the bending head, it allows in the absence of a manipulator, an undesirable irregular fall of the workpieces on the floor near the machine feet or on other assemblies of the machine.

Another advantage of the invention is that the bending processes are easier to carry out, even if it is very complex and requiring a lot of space Bending processes, due to the reduced Cross dimensions of the machine and the possible Swiveling movement of the bending head.

The direct use of the bending head as Manipulation device of the workpiece makes it possible to significantly increase the efficiency of the bending machine. So it is, e.g. possible from the bending arm of the bending head assumable positions for taking out with the Workpiece in the work area of others Processing facilities such as e.g. Drilling equipment, Chamfering devices, thread cutting devices, Markers, feeders for nuts or To arrive at loading or unloading stations.

The slide of the bending machine itself, because of this is pivotally arranged, the possibility opens up several Machining units on the workpiece in the form of a Attack the rod or a pipe.

So it is, e.g. possible to use a bending head left-hand bending and another Bending head to carry out to the right Bending work or a bending head as well as a Provide chamfering device.

Another advantage, besides the possibility of the workpiece to handle directly with the bending head is through the Possibility opened during the editing operations Turn the end of the workpiece with pliers, by a lot perform complex bending processes.

Figur 1 schematisch eine Seitenansicht teilweise im Schnitt der Biegemaschine;

Figur 2 schematisch in einer Draufsicht eine Biegemaschine;

Figur 3 schematisch in Vorderansicht die Biegemaschine mit dem Biegekopf in vertikaler Anordnung;

Figur 4 schematisch in Voderansicht, die Biegemaschine mit nach unten gerichtetem Schlitten;

Figur 5 schematisch eine weitere Vorderansicht einer Biegemaschine mit dem Schlitten, der zu einer Entladeeinrichtung für bearbeitete Werkstücke verschwenkt ist.

The object of the invention will now be described in more detail using an exemplary embodiment and shown in the drawings. The drawings show:

Figure 1 schematically shows a side view partly in section of the bending machine;

Figure 2 shows schematically in a plan view a bending machine;

Figure 3 schematically in front view of the bending machine with the bending head in a vertical arrangement;

Figure 4 schematically in front view, the bending machine with the slide directed downwards;

Figure 5 schematically shows a further front view of a bending machine with the carriage, which is pivoted to an unloading device for machined workpieces.

The essentials can be seen in FIGS. 1, 2 and 3 Assemblies of the total marked with 1 Bending machine can be removed.

A base frame or machine frame 2, which essentially consists of one elongated prismatic body, points in Cross-section in an essentially L-shaped shape and lies on one side 3 of the L-shaped body on the floor, whereas the second side 4 of the body is vertically upwards is directed.

The two ends of the elongated prismatic body of the Machine frame form a front part (arrow F) and a rear part (arrow R), i.e. one forward directed part, e.g. one looking backwards Part of the machine.

A plate 5, e.g. a rectangular plate, is provided on the top of the machine frame 2.

A pin 6 with a vertical axis in the rear part the machine frame 2 is provided, connects the Plate 5 with the base frame 2.

At the top of the wall of the base frame 2 are Rails 7 provided with 8 skids Operational connection are on the underside of the plate 5 are arranged.

The plate 5 is arranged pivotably about the pin 6. This means that the plate 5 from a position in which it congruent with the longitudinal extension of the base frame 2 is, can be pivoted sideways to the base frame. There are elastic return devices (not shown) provided that the carriage 5 always in its starting position lead back.

A pair of pliers for gripping and aligning the workpieces in Shape of bars or tubes (not shown), is with 10 designated and arranged on the carriage that on the plate 5th is arranged.

Tensioning devices, not shown, of the tongs 10 define an axis 11, against which the straight Workpiece that is to be bent later undergo is aligned.

The pliers 10 are in the longitudinal direction with the plate 5 connected, e.g. about guides (not shown) that are arranged parallel to the axis 11 of the pliers 10.

With the pliers 10 and the carriage are servomotors 12 and 13 connected.

The servomotors 12 and 13 allow the angular position of the Pliers 10 to adjust the axis 11 (arrow Z), as well as the Control the feed of the carriage on the plate (arrow X).

In the rear part of the plate 5 is a known one Pull-out device provided, the total with 15 is marked and with the axis 11 of the pliers 10 flees.

At the front of the machine frame 2 is a Carriage 20 arranged.

The carriage 20 has e.g. L-shaped gel shape, one Sidewall 21 is approximately parallel to the axis 11 of the pliers 10 aligned. A second wall 22 is with a plate 25 operatively connected to the machine frame 2 opposite.

Guide rails (not shown) for the carriage 22 are provided on the plate 25 and transverse to the axis 11 of the Pliers 10 arranged and set an axis 30 for displacement of the slide 20 (arrow T).

A controllable servo motor 31, which is on the plate 25 is arranged leads the sliding movement of the carriage 20 against the plate 25 through. So is the servo motor 31, e.g. with a ball screw (not shown) connected, this ball screw is opposite the Slideways of the slide 20 aligned and takes a (not shown) threaded nut on the Page 22 of the carriage 20 is attached.

A shaft 35 extends from the surface 34 that the Plate 25 of the frame is opposite to the axis 11 of the pliers 10.

The axis 36 of the shaft 35 defines a pivot axis for plate 25 (arrow Q).

The shaft 35 is largely inside the Machine frame 2, through the vertical wall 4th is arranged.

Machine elements 40, 41 for storage and implementation a swiveling movement, e.g. Roller bearings or plain bearings, are connected to the shaft 35 and in the body of the Base frame 2 housed.

A controlled reduction gear 45 is inside the Machine frame 2 arranged and with the shaft 35 connected.

So, e.g. the reduction gear 25 with a pinion 48 provided that with a gear 49 in operative connection stands, which is arranged on the shaft 35.

Similarly, it is possible to slide 20 on a plate rotatably and the plate slidably on the Assemble machine frame 2.

However, this solution is not particularly advantageous. The machine elements that enable the carriage 20 to rotate must have considerable rigidity and consequently have larger dimensions. These facts are difficult to reconcile with the limited space for housing the plate. If, on the other hand, components, such as the receiving shaft 35, which enable a rotary movement, are arranged between the plate and the machine frame, there are no restrictions with regard to the space required for these components and their storage and drive means.
A known bending head, which is identified overall by 50, is arranged at the end of the wall 21 parallel to the axis 11 of the collet 10.

The bending head 50 has a pivotable arm 51 (Arrow Y) and this arm can be controlled by one (not shown) pins are pivoted. This cone is arranged perpendicular to the axis 11 of the collet 10. The Cone sets an axis 52 for carrying out the Bending movement in machine 1 fixed. Known Matrices 54 are stored on the bending pin.

A carriage 53 for clamping the workpiece, which is the shape a rod or pipe that is in progress is located on the arm 51.

A second carriage 56, which is provided with castors, is slidably mounted on an arm 57, the arm 57 on the slide 20 transversely to the axis 11 of the collet 10 arranged.

Advantageously, the carriage 20 can be U-shaped or Have a T-shape, it is sufficient that the carriage with sufficient rigidity to perform a Bending process is formed and a connecting surface to the plate 25, which is transverse to the axis 11 of the Collet 10 is arranged. Furthermore, one or more Brackets for one or more bending heads 50 provided with its axis 52 perpendicular to the axis 11th the pliers 10 are arranged.

Advantageously, the carriage 20, thanks to the Plate 25, pivoted about the axis 36 (arrow Q) and can accommodate several processing units, which on Scope of the carriage body 20 are arranged. Will the Plate 25 pivoted, these units with the Axis 11 of the collet 10 brought into alignment by one Machining the workpiece in the form of a bar or a To enable pipe.

For example, it is advantageous to make the carriage U-shaped.
A slide designed in this way can accommodate a bending head at the end of a first arm of the U-shaped structure and a finishing unit on the second arm of the U-shaped structure. The carriage 20 can be moved transversely to the axis 11 of the pliers 10 relative to the machine frame 2.

The components 40, 41 for mounting and rotating the shaft 35, the plate 25 and the reduction gear 45 are picked up by a carriage that is movable from the Base frame is recorded and controlled, under providence is displaceable from known control devices.

The movable carriage of the plate 25 is with guides (not shown) connected, these guides are connected to the Base frame 2 connected and transverse to the axis 11 of the Collet 10 arranged.

The drive and control devices of the servomotors 12, 13, 31, 45 for driving around the axes 11, 30, 35, 52 of the Machine 1 are housed in a control cabinet 60, in the machine frame 2 at the rear part is arranged. The cabinet 60 is inside the Recess through the L-shaped shape of the Machine frame 2 is arranged, whereby the Front of the machine frame near the Sledge 20 remains free and accessible.

The drive and control devices are with one known NC unit (not shown) equipped.

Known transducers (not shown) that are various drive devices of the machine 1 are arranged, form a feedback of the control signals to the NC unit.

Subsequently, the operation of the carriage 20 is under 4 and 5 described.

It is assumed that the bending head 50 as Manipulator during a straight removal process Workpiece 71 in the form of a rod, a profile or a pipe from a storage station 70 is used and the bending head is also released when a bent Workpiece 81 delivers this to an unloading station 80.

If you look at the front of machine 1, the Possibility of a pivoting movement (arrow 90) in the Clockwise plate 25 (Figure 4) can be found.

The carriages 53, 56 are then removed from the clamped and in contact with the die 54 retracted and an opening 91 is formed Opening 91 is made with the workpiece 71 by a fork the loading station 70 is carried, brought into alignment.

The carriage 20 to is moved (arrow 92) to align the grooved surface of the die 54, with respect to workpiece 71.

There is a counterclockwise rotation the plate 25, whereby the workpiece 71 in the groove of the Matrix 54 comes to rest.

There is then a feed movement (arrow 93) of the Slide 53 until the workpiece 71 is clamped between the slide 53 and the die 54.

Then there is a rotary movement (against the Clockwise) of the plate 25 and a retraction of the Slide 20 until the workpiece 71 is aligned performed against the axis 11 of the pliers 10.

Then the pliers 10 are pushed forward Grasp the free end of the workpiece 71 enable.

Then the known bending processes carried out.

Once the workpiece 71 is deformed in the desired manner has been opened, the pliers 10 is opened, the end of the workpiece is released and the pliers 10 on the plate 5 retracted (Figure 5).

The carriage 20 is then clockwise (arrow 100) rotated and moved until the deformed workpiece 81 a Unloading station 80, which is designed accordingly, reached.

The carriage then moves back (arrow 101) 53 to release the workpiece 81.

The plate 25 is then pivoted in Clockwise, causing the workpiece to leak 81 leads out of the recess of the die 54 and then there is a return (arrow 102) of the slide 20, the is now free to be moved into a position in which again picked up a workpiece from the loading station can be.

The carriage 20 advantageously moves this deformed workpiece 81 and conveys it to one or to several additional processing stations. These stations to carry out additional processing Drilling, chamfering or marking processes and are in one Space provided by the deformed workpiece 81, the is stretched in the bending head 50 of the carriage 20, accessible is.

Claims (6)

1. Machine (1) for bending elongated material such as pipes, bars or profiles comprising a base frame (2), which receives a carriage, which is equipped with a clamping tool (10) for the controlled rotation and displacement of a workpiece, and also a bending head (50), characterised in that the bending head (50) is received by a slide (20) which can be displaced transversely with respect the axis (11) of the clamping tool (10) and which is equipped with controllable drive means, wherein the moveable slide (20) is received by a plate (25) which is connected to a receiving shaft (35) which is mounted in the base frame (2) in such a manner as to be able to pivot about an axis parallel with the axis (11) of the clamping tool (10) and is operatively connected to controllable drive means.
2. Machine (1), according to claim 1, characterised in that the receiving shaft (35) is received by a carriage which is disposed in such a manner as to be able to be displaced and which is disposed in the base frame (2) of the machine and that the carriage is operatively connected to controllable drive means.
3. Machine (1) according to claim 1, characterised in that the plate (25) comprises guides for displacing the slide (20) and a screw spindle which is operatively connected to an auxiliary motor (31), that the screw spindle is operatively connected to a screw nut which is attached to the slide (20).
4. Machine (1) according to claim 1, characterised in that the receiving shaft (35) lifts up from the plate (25) and the means (40, 41) are provided for mounting and driving the receiving shaft (35) on the machine frame (2) and that a control device for monitoring the rotational movement is operatively connected to the shaft (35).
5. Machine (1) according to claim 4, characterised in that a controlled step-down gear (45) is received by the base frame (2) of the machine and that the receiving shaft (35) supports a gearwheel (49) and the step-down gear (45) is connected to the gearwheel (49) by means of a pinion (48).
6. Machine (1) according to claim 1, characterised in that a plurality of processing units are disposed on the slide (20).

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