DE102017120292A1 - Separating device for pipes - Google Patents

Abstract

Separating device (1) for pipes (3), comprising clamping means for fixing a pipe (3) relative to the separating device (1), a knife (11) with which the fixed by the clamping means tube (3) can be severed, and a Knife holder (10) which can move the knife relative to the fixed pipe (3), wherein the knife holder (10) and / or the separating device (1) are formed such that during the separation process, the knife (11) in the circumferential direction of the tube (3) is moved, in particular over the entire circumference of the tube (3) is moved in the circumferential direction.

Description

The present invention relates to a separation device for pipes according to the preamble of claim 1. The invention further relates to a separation plant with such a separation device and a method for separating a portion of a pipe, wherein the method is carried out in particular with such a separation plant or such a separation device.

Separating devices, separation systems and methods of the aforementioned type are known from the prior art. So far, such separation tasks are done in industrial application mainly with sawing or combustion process. Such methods result in a high amount of chips or dirt in connection with noise.

In addition, there are already applications where a hardened steel knife is driven through the tube by linear motion to separate it. In such methods, depending on the application, an inhomogeneous burr is produced, which in some cases considerably exceeds the permissible tolerances. Another undesirable side effect is the high wear of the elaborately designed knives, which is associated with high maintenance costs. This is particularly because the blade must be comparatively large in such a separation device.

The problem underlying the present invention is the provision of a separating device of the type mentioned, with which the separation of pipe sections with a lower burr construction is connected and / or in which the maintenance costs are lower. Furthermore, a separation system with such a separation device and a method of the type mentioned are given.

This is achieved by a separation device of the type mentioned above with the characterizing features of claim 1, by a separation plant of the type mentioned above with the characterizing features of claim 9 and by a method having the features of claim 11.

According to claim 1 it is provided that the knife holder and / or the separating device are designed such that during the separation process, the knife is moved in the circumferential direction of the tube, in particular over the entire circumference of the tube is moved in the circumferential direction. Preferably, the knife may be made of hardened steel. By the movement of the knife in the circumferential direction, the knife may have a much smaller size, so that the maintenance costs can be reduced. Furthermore, the cutting process during the rotation proves to be gentler, so that the wear of the knife is lower.

The separating device can be designed such that the knife shears the material of the tube from the inside to the outside. As a result, the formation of a burr can be largely avoided. The separation movement from the inside to the outside can be achieved by moving the knife a little way into the interior of the pipe through a slot inserted into the pipe before the cutting process.

It is possible that the clamping means comprise clamping jaws, which in particular also consist of hardened steel. In this case, the separating device can be designed such that the knife shears the material of the tube against the clamping jaws. The jaws thus assist in the separation process.

It can be provided that the separating device comprises more than one knife, wherein the blades are arranged in the circumferential direction spaced in the knife holder, in particular wherein the blades in the circumferential direction have equal angular distances from one another. In this case, the knife holder and / or the separating device may be designed such that during the separation process, the blades are moved in the circumferential direction of the tube over a circumferential angle, wherein the size of the circumferential angle substantially equal to 360 ° divided by the number of blades. By using several knives, the time required for the separation process can be reduced.

There is the possibility that the separating device comprises a swivel drive, which can move the knife holder with the knife in the circumferential direction around the tube. A swivel drive can move the knife holder with the knife concentrically around the pipe by suitable means such as a worm or helical gear while ensuring the free passage of the tube.

According to claim 9, the separation plant is designed such that the separation device can be moved in the tube longitudinal direction, so that the separation device can separate a portion of the tube during movement at a predetermined position of the tube.

It can be provided that the separating device can be moved together with the tube in the tube longitudinal direction in order to separate a portion of the tube during the movement of the tube. This is the separation system in the frame an industrial pipe production also suitable for flying operation. In this case, for example, drives a profiling in continuous operation at a predetermined speed. The separation unit is able to synchronize the separation device to a predetermined position of the moving tube and to separate in the movement together with the tube from this one section.

Alternatively, the separation system can also work in the so-called start-stop operation in which a tube is supplied and stopped, from which then a section is separated in the unmoved state.

• - In das Rohmaterial, aus dem das Rohr gefertigt wird, oder in das Rohr wird mindestens eine Öffnung eingebracht,
• - das Messer einer Trennvorrichtung, insbesondere einer erfindungsgemäßen Trennvorrichtung, wird in die mindestens eine Öffnung eingebracht,
• - das Messer wird in Umfangsrichtung durch die Wandung des Rohres geführt bis ein Abschnitt des Rohres abgetrennt ist.

According to claim 11, it is provided that the method for separating a section of a pipe is characterized by the following method steps:

• - In the raw material from which the pipe is made, or in the tube at least one opening is introduced,
• the knife of a separating device, in particular a separating device according to the invention, is introduced into the at least one opening,
• - The knife is guided in the circumferential direction through the wall of the tube until a portion of the tube is separated.

By the introduction of an opening, for example, already in the raw material from which the pipe is made, the separation of the pipe section can be significantly simplified.

It can be provided more than one opening, wherein the openings are spaced apart in the tube longitudinal direction. In particular, the at least one opening may be formed as a slot, which extends in particular in the circumferential direction of the tube.

In this case, the width of the opening, in particular the width of the slot substantially correspond to the width of the blade in the longitudinal direction of the tube, in particular the width of the blade plus a small franking.

• 1 eine perspektivische, isometrische Ansicht einer Ausführungsform einer erfindungsgemäßen Trennvorrichtung mit einem durch die Trennvorrichtung hindurchragenden Rohr;
• 2 eine Vorderansicht der Trennvorrichtung gemäß 1;
• 3 eine Draufsicht auf die Trennvorrichtung gemäß 1;
• 4 eine Schnittansicht gemäß den Pfeilen IV - IV in 3;
• 5 eine perspektivische Ansicht des durchzutrennenden Rohres;
• 6 eine Vorderansicht der Trennvorrichtung gemäß 1 in einer Grundstellung des Messers, wobei die vor der Messerhalterung liegenden Spannmittel der Trennvorrichtung ausgeblendet sind;
• 7 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer ersten Schneidstellung des Messers;
• 8 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer zweiten Schneidstellung des Messers;
• 9 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer dritten Schneidstellung des Messers;
• 10 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer vierten Schneidstellung des Messers;
• 11 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer fünften Schneidstellung des Messers;
• 12 eine 6 entsprechende Vorderansicht der Trennvorrichtung in einer sechsten Schneidstellung des Messers.

Further features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Show:

• 1 a perspective, isometric view of an embodiment of a separating device according to the invention with a projecting through the separator tube;
• 2 a front view of the separator according to 1 ;
• 3 a plan view of the separator according to 1 ;
• 4 a sectional view taken along the arrows IV - IV in 3 ;
• 5 a perspective view of durchzutrennenden tube;
• 6 a front view of the separator according to 1 in a basic position of the knife, wherein the lying before the knife holder clamping means of the separator are hidden;
• 7 a 6 corresponding front view of the separating device in a first cutting position of the knife;
• 8th a 6 corresponding front view of the separator in a second cutting position of the knife;
• 9 a 6 corresponding front view of the separator in a third cutting position of the knife;
• 10 a 6 corresponding front view of the separator in a fourth cutting position of the knife;
• 11 a 6 corresponding front view of the separator in a fifth cutting position of the knife;
• 12 a 6 corresponding front view of the separator in a sixth cutting position of the knife.

In the figures, identical and functionally identical parts are provided with the same reference numerals.

The illustrated embodiment of a separation device according to the invention 1 can be used to cut off a section 2 a pipe 3 serve, which is designed in particular as an endless tube and is permanently moved in the tube longitudinal direction (see 1 ). The separator 1 may be part of an unillustrated separation plant, which is the separation device 1 together with the pipe 3 in the tube longitudinal direction can move to the section 2 during the movement of the pipe 3 separate.

There is the possibility that the separation plant is part of a larger plant, which includes a likewise not shown profiling, in which the pipe 3 is made of a flat raw material. The Profilieranlage can drive in continuous operation at a predetermined speed or the pipe 3 spend at a given speed. The separation system can be the separation device 1 to a certain Position of the pipe 3 move and then the movement of the separator 1 with that of the emerging from the Profilieranlage tube 3 synchronize so that both move at the same speed. In this state, the separator 1 on the pipe 3 be set and a section 2 of the pipe 3 split off.

Alternatively, it may well be provided to run the separation system in the so-called start-stop operation, in which a tube is supplied and stopped after reaching the desired position. The separation of the pipe section then takes place in the stationary state of the tube. There is no synchronization between the movement of the tube 3 and the movement of the separator 1 instead of.

The separator 1 includes as clamping device two hydraulic pipe clamps 4 . 5 and two pairs of hardened jaws 6a . 6b ; 7a . 7b with which the pipe 3 in the separator 1 is fixed (see 4 ). There are both on the inlet side 8th as well as on the outlet side 9 each one of the pipe tensioner 4 . 5 and two of the jaws 6a . 6b ; 7a . 7b arranged. In this way, both the incoming section of the pipe 3 as well as the section to be separated 2 kept safe.

The separator 1 further includes a knife holder 10 with a knife 11 (please refer 6 ). The knife 11 consists of a hardened steel and is comparatively small. The knife holder 10 can the knife 11 along the arrow 12 linear from the in 6 illustrated basic position of the knife 11 in the in the 7 to 12 move the displayed cutting positions. After performing the separation process, the knife can 11 again along the arrow 12 be moved linearly into the basic position.

The separator 1 further comprises a swivel drive 13 who has the knife holder 10 together with the knife 11 along the arrow 14 in the circumferential direction of the tube 3 can move (see 6 ). The swivel drive 13 may include a worm or spur gear or similar assembly to the knife holder 10 concentric around the pipe 3 to be able to move. The swivel drive 13 has a free passage for the pipe 3 on.

Before separating the section 2 from the pipe 3 be in the pipe 3 or preferably in the flat raw material from which the tube 3 is made, slots 15 introduced at predetermined intervals to each other. The distances between the slots 15 correspond to the length of the sections to be separated 2 of the pipe 3 , 5 shows that the slots 15 a little way in the circumferential direction of the tube 3 extend. The width of the slots 15 in the tube longitudinal direction corresponds to the width of the knife 11 in the tube longitudinal direction plus a small franking.

It can be provided, the slots 15 by punching in the pipe 3 or to bring in the raw material. There is a possibility, the slots 15 by other procedures in the pipe 3 or to introduce the raw material, such as by means of a laser beam.

There is also the possibility instead of a slot 15 differently shaped openings, for example openings with an oval or a rectangular or a circular cross-section in the tube 3 or to bring in the raw material.

For separating the section 2 becomes the knife 11 along the arrow 12 between the jaws 6a . 6b on the inlet side 8th on the one hand and the clamping jaws 7a . 7b on the outlet side 9 on the other hand, into the slot 15 moves, leaving the tip of the knife 11 in the interior of the pipe 3 protrudes (see 7 ). Then the knife becomes 11 in the circumferential direction through the wall of the tube 3 moved (see 8th to 12 ), so that while the material of the wall of the slowly rotating knife 11 from inside to outside against the jaws 6a . 6b ; 7a . 7b is sheared off. The jaws 6a . 6b ; 7a . 7b have the function of serving as an opponent during the shearing process. Between the jaws 6a . 6b ; 7a . 7b is a free space 16 for the unrestricted pivoting movement of the knife 11 available (see 4 ).

By the position of the knife 11 in the separation process, the material of the wall of the tube 3 with the width of the knife 11 peeled off to the outside. The jaws 6a . 6b ; 7a . 7b serve as a counterknife for the knife 11 , The resulting scrap falls at the end of the separation process from the separator 1 out. The formation of a ridge is avoided by this slow shearing or peeling from the inside out.

After completion of the separation process, the knife becomes 11 moved back to the normal position, so that the separation plant is ready for the next separation process.

There is quite a possibility, instead of a knife 11 to provide two blades, which are preferably in a rotation angle of 180 ° to each other, ie in the radial direction of the tube 3 opposite each other. As a result, the time required for the separation process can be reduced because two blades simultaneously shear the wall of the pipe.

It can also be provided to use more than two knives, which are then spaced apart in particular at angular intervals which correspond to 360 ° by the number of knives.

Claims (15)

Separating device (1) for tubes (3), comprising - clamping means for fixing a tube (3) relative to the separating device (1), - a knife (11) with which the fixed by the clamping means tube (3) can be severed, a knife holder (10) which can move the knife relative to the fixed tube (3), characterized in that the knife holder (10) and / or the separating device (1) are designed such that during the separating operation the knife (11 ) is moved in the circumferential direction of the tube (3), in particular over the entire circumference of the tube (3) is moved in the circumferential direction. Separating device (1) after Claim 1 , characterized in that the knife (11) consists of hardened steel. Separating device (1) according to one of Claims 1 or 2 , characterized in that the separating device (1) is designed such that the knife (11) shears the material of the tube (3) from the inside outwards. Separating device (1) according to one of Claims 1 to 3 , characterized in that the clamping means comprise clamping jaws (6a, 6b, 7a, 7b), which in particular likewise consist of hardened steel. Separating device (1) after Claim 4 , characterized in that the separating device (1) is designed such that the knife (11) shears the material of the tube (3) against the clamping jaws (6a, 6b, 7a, 7b). Separating device (1) according to one of Claims 1 to 5 , characterized in that the separating device (1) more than one knife (11), wherein the knives (11) in the circumferential direction spaced in the knife holder (10) are arranged, in particular wherein the blades (11) in the circumferential direction equal angular distances from one another , Separating device (1) after Claim 6 , characterized in that the knife holder (10) and / or the separating device (1) are formed such that during the separation process, the blades (11) are moved in the circumferential direction of the tube (3) over a circumferential angle, wherein the size of the circumferential angle in Substantially equal to 360 ° divided by the number of knives (11). Separating device (1) according to one of Claims 1 to 7 , characterized in that the separating device (1) comprises a swivel drive (13) which can move the knife holder (10) with the knife (11) in the circumferential direction around the tube (3). Separating plant comprising a separating device (1) according to one of Claims 1 to 8th , characterized in that the separation plant is designed such that the separation device (1) can be moved in the tube longitudinal direction, so that the separating device (1) a section (2) of the tube (3) at a predetermined position of the tube (3) sever can. Separator after Claim 8 , characterized in that the separating device can be moved together with the tube (3) in the tube longitudinal direction to a portion (2) of the tube (3) during the movement of the tube (3) separate. Method for separating a section of a pipe, the method in particular comprising a separation plant according to one of the Claims 9 or 10 or with a separating device (1) according to one of Claims 1 to 8th is carried out, characterized by the following process steps: - In the raw material from which the tube (3) is made, or in the tube (3) at least one opening is introduced, - the knife (11) of a separating device (1), in particular a Separating device (1) according to one of Claims 1 to 9 , is introduced into the at least one opening, - the knife (11) is guided in the circumferential direction through the wall of the tube (3) until a portion (2) of the tube (3) is separated. Method according to Claim 11 , characterized in that during the movement of the blade (11) in the circumferential direction, the material of the tube (3) is sheared from the inside to the outside. Method according to one of Claims 11 or 12 , characterized in that more than one opening is provided, wherein the openings are spaced in the tube longitudinal direction to each other. Method according to one of Claims 11 to 13 , characterized in that the opening is formed as a slot (15) which extends in particular in the circumferential direction of the tube (3). Method according to one of Claims 11 to 14 , characterized in that the width of the opening, in particular the width of the slot (15), substantially the width of the blade (11) in Longitudinal direction of the tube (3) corresponds, in particular the width of the blade (11) plus a small clearance corresponds.

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