EP0864386B1 - Method and device for the production of spirals from wire, reinforcing steel or metallic tube - Google Patents

Abstract

The method uses an advance feed to move the material (2) and, at the same time, it is bent by a bending unit (6) fitted to a moving frame (7) following the forward movement of the material (2). The frame (7) allows the coils to drop by gravity downwards and clear the bending zone. The bent coils are collected by a rotating container, which is rotated according to the production cycle time of the feed and bending actions.

Description

The invention is a method and an apparatus for Production of spirals from wire, reinforcing steel or a metallic pipe, any cross-section with not only identical, but also different Forms of turns.

Spirals of this type are made of wire, reinforcing steel or a metallic tube made with the help of ordinary bending devices, the wire, the Reinforcing steel or the metallic pipe first by a length equal to the length of the one side of the spiral cross section is advanced and then after the Feed is stopped by the necessary angle is bent. By successive repetitions of this procedure becomes the desired spiral manufactured. The disadvantage of this method is that the spiral is made using increasing dimensions, length and weight for the following reasons becomes more difficult; From a certain length, the spiral can advance due to its own weight, no longer push the already produced. The wire, Reinforcing steel or the metallic pipe pushes the spiral already produced up to that Point at which plastic due to friction and its own weight Deformations take place. It is also very difficult with this method to produce complicated winding forms such as (Z) and (I) in drawing 3. Usually spirals with such complicated winding shapes are used hand-operated bending tools with a lot of time and effort manufactured.

Another method is described in WO-A-9324254. The spirals are manufactured downwards and taken up by a collecting device. The Bending unit is firmly mounted on the frame of the machine and the Collecting device is moved in two directions on the horizontal plane, so the spiral already produced the movement of the page just made or the straight side of the spiral follows in the bending device. The The moving tables are moved in a large area are built very stably, and the movement of the collecting device becomes slow. The method leads to slow machine with low productivity.

It is obvious that these production methods are bad Result in product quality, low productivity and high production costs.

The aim of the invention is to solve the problems described above by offers a simple and quick method for the automated production of qualitative spirals made of wire, reinforcing steel or a metallic pipe any Cross section allowed.

This goal is achieved by a method according to claim 1 or by a Device according to claim 2 achieved.

The invention relates to a device that automatic Production of spirals from wire, reinforcing steel or a metallic pipe, with makes possible not only identical but also different winding forms, to offer and the simple in construction, reliable in functionality with high productivity and easy to use.

The invention provides a method of making wire spirals, Reinforcing steel or a metallic pipe, with not only identical ones but also different turns, which is characterized in that the already produced spiral falls down, picked up by a suitable device and at the same time the movements and the paths of the moment in Production turns follows. It is also characterized in that bending at the same time as advancing the wire, reinforcing steel or metallic tube can take place. The invention also provides the device that realized this method.

In more detail: The invention offers a method for producing spirals from wire, reinforcing steel or a metallic pipe of any cross-section, with not only identical but also different winding forms, which is characterized in that the windings already produced are picked up by a suitable collecting device, which together with they are followed by the feed and bending movements of the turns in production. In this way, the windings that have already been produced are caught and thus the production of the spiral is possible at all.

The method also offers a collection device, its capacity variable and adaptable to the dimensions of the windings already produced, in a way that the optimal wearing of the above. Turns guaranteed and as above even mentions the production of the spiral without restrictions, with a high Production speed makes possible what high productivity, thanks to the economically-technically oriented method and the economic use of the above the method mentioned.

Furthermore, the method in the sense of the invention is characterized in that the turns of the spiral are produced downwards and with the help of gravity get into a collecting device, so that the production level, in which the new Windings are created which are kept free from those already produced.

In addition, the method in the sense of the invention is characterized in that that the feeding and bending of the wire, reinforcing steel or metallic Rohres take place simultaneously and moves synchronized with these movements the collecting device so that it catches the newly produced turns. In this way, the spiral production is optimized after the Spiral production with any winding forms necessary movements both Collection and bending device can be reduced to a minimum.

Zeichnung 1 stellt eine seitliche Ansicht der Vorrichtung mit der Sammelvorrichtung im Bereich der Spiralproduktion im Sinne der Erfindung dar.

Zeichnung 2 stellt eine Draufsicht der Vorrichtung mit der Sammelvorrichtung im Bereich der Entladung dar.

Zeichnung 3 zeigt verschiedene Windungsformen der Spiralen, die nach der Methode und der Vorrichtung im Sinne der Erfindung hergestellt werden können.

Zeichnung 4 stellt eine allgemeine geometrische Beschreibung einer beliebigen Spiralwindung dar.

Zeichnung 5 zeigt schematisch die verschiedene Phasen der Methode zur Herstellung der Spirale im Sinne der Erfindung.

The features of the device in the sense of the invention can be understood from the description below of one of the possible implementation. Such an implementation is shown below with references to drawings that only describe this particular implementation of the device for producing spirals from wire, reinforcing steel or a metallic tube of any cross-section with not only identical but also different winding forms, where:

Drawing 1 shows a side view of the device with the collecting device in the area of spiral production in the sense of the invention.

Drawing 2 shows a top view of the device with the collecting device in the area of the unloading.

Drawing 3 shows different forms of turns of the spirals, which can be produced by the method and the device according to the invention.

Drawing 4 shows a general geometric description of any spiral turn.

Drawing 5 shows schematically the different phases of the method for producing the spiral in the sense of the invention.

For a better view of the movements and the phases of the method in the In the sense of the invention, the shape of any winding of the spiral is given below described geometrically. There will be two not crossing and in space vertical axes X and Y defined.

The spiral to be produced is completely defined by defining the polygons of its turns. The polygon of any winding (drawing 4) is defined by the sequence of the pairs (I _I , Φ _I ), where I _I , the length of the side A _I A _{I + 1} and Φ _I the outside angle between the sides A _I A _{I +1} and A _{I + 1} A _{I + 2} . Furthermore, the point K and its distances C _I from the corners A _{I of} the polygon of the turn are defined.

According to the method in the sense of the invention, the production of the spiral follows in the following steps: first, the wire is advanced by a length A ₁ A ₂ = I ₁ and directed along the axis X (drawing 5α), while the bending device remains immobile. Then a length A ₂ A ₃ = I _{2 of} the wire is advanced and straightened (drawing 5α and 5β), while the bending device moves simultaneously with the advanced wire length I ₂ and the already straightened wire length A ₁ A ₂ = I ₁ around Angle Φ ₁ (drawing 5α and 5β) bends. Next, the bending device is moved to position A ₃ , which is defined by the distance A ₂ A ₃ = I ₂ (drawing 5γ). In this way, part A ₁ A ₂ A _{3 of} the spiral turn has been produced. In the next step, the wire is advanced by a length I ₃ , with simultaneous movement of the bending device and bending of the wire by the angle Φ ₂ . The movements described above are repeated until the production of the winding and furthermore that of the spiral is completed.

The turns already produced are picked up by a collecting device and follow the production movements of the turns under production. During the production of the length A ₁ A ₂ (drawing 5α and 5β), the windings already produced rotate around the point K by the angle γ = γ ₁ + γ ₂ and at the same time the point K moves on the axis Y (the different positions of point K are shown in drawing 5α and 5β). The point K is moved in such a way that the distance KA ₂ = C ₂ always remains constant.

In sync with the relocation and rotation of those already produced Turns increases the volume of the collector, so that it can take up the newly produced turns. The enlargement of the Recording volume of the collecting device can be continuous and synchronous with the Production of the new turns or in batches after the production of one certain number of turns take place.

Furthermore, the production of spirals whose turns are circles or arcs or one part of a turn is an arc and the rest is an open polygon, by replacing the bending device with a suitable device for production arcuate turns possible.

The method described above in the sense of the invention can be by Implement the device which is described in detail below. The single ones Functions are monitored and controlled by a computer controlled control unit controlled.

The wire, reinforcing steel or the metallic pipe (2) on the reel (1) is pulled and straightened by the straightening and measuring device (3) and is moved using a Servo motor (4) advanced to the bending device (6). The bending device (6) is arranged so that the wire, reinforcing steel or the metallic pipe (2) on the horizontal plane is bent and the windings (21) produced Bending plane downward, with the help of gravity, and are exited by the Collecting device added. The bending device (6) rotates and bends the Wire, reinforcing steel or the metallic pipe (2) at a suitable angle, driven by a servo motor (5) and is attached to a trolley (7) on two rails (8) lying and driven by a servo motor (10) in parallel moved to the advanced wire, reinforcing steel or the metallic pipe (2). The Servo motor (10) drives the trolley (7) of the bending device (6) so that the synchronous feeding and bending of wire, reinforcing steel or metallic Pipe (2) for producing one side of a turn according to the above Method in the sense of the invention is realized. The whole system is on a solid Frame (9) attached, which in turn on a solid structure (15) in a suitable Height is fixed so that the windings produced by one Collecting device can be included.

The turns (21) are produced in a collecting device rotates, their capacity varies and is perpendicular to the direction of feed Wire, reinforcing steel or metallic pipe can be moved, added implementing the method described above.

The turns (21) already produced are in the collecting device by a sufficient number of vertical arms (11) (four pairs in the example of drawings 1 and 2) laterally and by the bars (20) which are fastened on a base (26) , limited at the bottom. The vertical arms (11) are suitably fastened on the guides (22) and are moved on these guides (22) with the aid of worms which are manually driven by the rotary wheels (23). It is possible to drive the rotary wheels (23) with the help of motors. The base (26) and the bars (20) form the lower boundary plane of the turns (21) of the spiral that have already been produced in the collecting device. The base (26) is fixed on a hollow axis (24), which can move vertically up and down on an inner guide, and is driven by a worm (25), which in turn is driven by a suitable motor (16) , driven. The base (26) together with the bars (20) rotates about the vertical axis (24) on which it is supported so freely that their rotation is independent of the upward and downward movement. In this way the variation of the capacity of the collecting device during the production of the winding (21) of the spiral, as required by the method described above, is realized.

The turns (21) already produced and the collecting device, which consists of the vertical arms (11), the bars (20) and the base (26), rotate about an axis which is identical to the axis of rotation of the hollow axis (24) and the snail (25) is. The guides (22) are mounted on an axis, which are suitably fastened on the trolley (13) and driven by a suitable motor (14). The vertical arms (11) are mounted in pairs (drawing 2) and between the two arms of a pair there is a rod (20). The rods (20) rotate together with the guides (22) and the windings which have already been produced simultaneously follow these rotary movements. In this way, the requirement for the turns of the windings already produced in accordance with the invention to be synchronized with the bending of the wire, reinforcing steel or the metallic tube (2) is realized.

The collecting device for the turns already produced (21) together with the mechanisms and motors is on a trolley (13) that on suitably mounted on guides (19), attached.

The synchronized sequence of the necessary movements takes place with the help of a central control unit, which controls the motors in a suitable manner.

The movement of the support frame (7) of the bending unit (6) and that of the trolley (13) of the collecting device can of course also be implemented differently, e.g. with the help of suitable motors on the frames (9), (15) and (18) on which the store individual mechanisms and transfer the movement to the Support frame (7) and the trolley (13) can be with the help of chains, straps or Screws and alternatively with motors on the support frame (7) and the trolley (13) and the transmission of motion with gears and toothed bars or with Snails take place.

Furthermore, the production of circular turns or arcuate Winding segments through manual or automated exchange of the Bending tools (27) and (28) possible.

In addition, the production of windings with different radii is the automatic exchange of tools stored in a suitable magazine can, possible.

After the production of the desired spiral, the wire, reinforcing steel or the metallic tube (2) in the area of the bending unit (6) from a suitable one Cutting tool cut.

The bending tools (27) and (28) of the bending unit (6) hold the wire, Reinforcing steel or the metallic pipe (2) during the simultaneous feed and Bending in a suitable way so that the rotation of the wire, reinforcing steel or the metallic tube (2) around its own axis is not possible. So in the case the presence of irregularities in the cross section of the wire, reinforcing steel or the metallic tube (2) avoided undesired twisting. To this This ensures the production of a high quality spiral.

The advantages of the invention are:

Optimal holding of the turns (21) of the spiral already produced, the high movement speeds of the individual mechanisms allowed and on these Way ensures a very high productivity.

Minimize the amount required to produce a spiral Forms of turns necessary movements, which minimizes the inertial forces and necessary operating performance. Because of the guaranteed low Energy consumption is an economical operation of the device and a high one Productivity ensured.

Minimize the dimensions of the device, which minimizes the Masses, minimizing the inertia and thus maximizing the Movement speeds and productivity leads. Furthermore, the minimization the dimensions require less space for the device.

Great flexibility of the device because of the central control unit, which controls the suitable motors and monitors the movements and thus Spirals of any shape can be produced.

Minimization of the necessary for the production of different spirals Changeover times due to the high flexibility of the device.

Very simple programming of the device using a computer. The the shapes and dimensions of the spirals to be produced are determined according to the Programming stored in a suitable storage medium and can be used at Can be called up and loaded from the central control unit.

It must be emphasized that the benefits of the method described here and Device with increasing weight, dimensions and complexity of the Turns of the spirals to be produced are all the greater.

Finally, the method and the device allow within the meaning of the invention the simple and fast production of spirals from wire, reinforcing steel or one metallic pipes of any cross section with not only identical, but also different forms of turns.

With any of the following claims wherever technical characteristics mentioned, these are accompanied by accompanying drawings and figures that serve and can only serve the purpose of better understanding the claims under no circumstances consider every element represented by these numbers based on Examples are recognized again, can be restricted.

Claims (8)

1. Method of production of spiral forms made of wire or rod or metal tube (2), of various diameter with not only identical but also different shape of each stirrup which is characterised by means for the simultaneous production of one side of the spiral form with the creation of the angle between the produced side with the adjacent produced side, which is achieved by the simultaneous motion of a bending mechanism (6) and the alimentation of the wire to be shaped or rod or metal tube (2), which is also fed and also straightened in the case of a non-straight wire or rod or metal tube (2) and which method is characterised by means for the spiral form is produced vertically downwards and with the gravity's assistance the level of the production of spiral forms is liberated from the already produced spiral forms, which are collected on a special collection unit and where the already produced spiral form (21) is held in the right way sideways and on the side below, and the capacity of the collection unit is changeable depending with the size of the already produced spiral form, which is also characterised by means for that the already produced spiral form (21) moves along with the collection unit in such a correct manner, so that its centre moves vertically toward the alimentation direction of the wire. the rod or the metal tube, and simultaneously rotates in such a way, so that the upper part of the stirrup which is being produced is in an aligned position with the alimentation of the wire or rod or metal tube.
2. Machine to produce spiral forms made of wire or rod or metal tube (2), of various diameter with not only identical but also different shape of each stirrup which applies the Method of Claim 1 and is characterised by means for it comprises of a bending head (6) for the wire's or rod's or metal tube's bending (2) which is moved by the adequate motor (5), where the bending head (6) is placed on a moving conveyor (7) and an alimentation and straightening mechanism (3), which is moved by the adequate motor (4) and by an adequate moving mechanism of collection and restraint of the produced spiral form.
3. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it includes a bending head (6), which is placed on a moving conveyor (7) which is moved on guides (8) through the adequate planes.
4. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it comprises of a bending head (6) on a movable conveyor (7), which is placed on a frame (9) at an adequate height so that the spiral forms produces are stacked (21) from the collection mechanism.
5. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it includes a collection mechanism, which comprises of sufficient number of pilasters couples (11), which are placed on guides (22) and are moved by a screw with the assistance of adequate volants (23) and of adequate number of joists (20) each one of which can move between the respective pilasters couple.
6. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it comprises of a collection mechanism, which includes the adequate pilasters (11) and the adequate joists (20), which joists (20), are placed on the base (26), which in its turn is placed adequately in such a manner,, so that it can rotated freely around the tube (24), which due to its adequate placement, ascends or descends moving from the screw (25) and the adequate motor (16), drawing along with it, the joists (20) and their base (26), and in addition the guides (22) on which the pilasters (11) are placed, are adjoint to an axis, which rotates by an adequate motor (14) and which rotation is transferred through the pilasters (11) to the joists (20) and thus, the collection unit is rotated with the content of the already produced spiral form.
7. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it comprises of a collection mechanism, which is adequately placed on the conveyor (13) which is moved on the frame (18) on the right guides (19) moved by the adequate motor (12), which frame (18) is placed vertically to the direction of the wire or rod or metallic tube (2).
8. Machine to produce spiral forms made of wire or rod or metal tube (2) of various diameter with not only identical but also different shape of every spiral form of each stirrup based on Claim 2, which is characterised by means for it comprises of a bending head (6) moving on a conveyor (13), which includes the right bending tools (27) and (28) which constraint adequately the wire or rod or metallic tube (2) during the in motion bending, so that the wire or rod or metallic tube is not distorted.

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