DE19834400C1 - Method of making thin wall tubes - Google Patents

Method of making thin wall tubes

Info

Publication number
DE19834400C1
DE19834400C1 DE1998134400 DE19834400A DE19834400C1 DE 19834400 C1 DE19834400 C1 DE 19834400C1 DE 1998134400 DE1998134400 DE 1998134400 DE 19834400 A DE19834400 A DE 19834400A DE 19834400 C1 DE19834400 C1 DE 19834400C1
Authority
DE
Germany
Prior art keywords
rollers
workpiece
edges
pairs
characterized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE1998134400
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DREISTERN WERK MASCHINENBAU GM
Original Assignee
DREISTERN WERK MASCHINENBAU GM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DREISTERN WERK MASCHINENBAU GM filed Critical DREISTERN WERK MASCHINENBAU GM
Priority to DE1998134400 priority Critical patent/DE19834400C1/en
Priority claimed from DE59902324A external-priority patent/DE59902324D1/en
Application granted granted Critical
Publication of DE19834400C1 publication Critical patent/DE19834400C1/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08Making tubes with welded or soldered seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08Making tubes with welded or soldered seams
    • B21C37/083Supply, or operations combined with supply, of strip material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers

Abstract

To produce a tube (2) from a band-shaped workpiece (3) originally flat in cross section, this is gradually curved in cross section in several successive forming stations formed by forming roller pairs until the tube shape is reached. If the edges (4) of the workpiece (3) are curved to such an extent that they each form an undercut, that is to say that the shaping rollers can no longer engage to such an extent that they can continue to shape the inside of the cross section, the partially shaped workpiece (3) twisted in a first rotational path by about a quarter turn and further deformed in this twisted position in the further feed in such a way that the slot located between the edges (4) is reduced as the feed progresses. Before the slot is finally approached or closed and welded, the workpiece (3) is rotated back in a second rotation section, after which the edges (4) are welded.

Description

The invention relates to a method for producing a tube, especially for a pipe with a small wall thickness, made of metallic Band material, with a relatively small diameter, according to the generic term of claim 1.

The invention also relates to a device for producing a Tube, especially for a tube with a small wall thickness metallic band material, with a relatively small diameter, after the preamble of claim 1.

Such a production of a tube is known (DE 35 29 160 A1). As a rule, the initially band-shaped workpiece (metallic strip material) cold an ever increasing deformation subjected to the edges. The first pairs of rollers in the feed direction have somewhat interlocking shapes that the Bend the tape material so far that the curved edges to the previous cross-section of the tape are slightly more than right-angled.

From this degree of deformation can no longer form roll in this Wise with an undercut, sometimes already to one Grip pipe preformed workpiece. It is therefore known to start  such a degree of deformation on the outer sides without drive Rollers provide the bent areas of the workpiece in the next pass press closer together and the pipe bend to complete. However, this often leads to an offset of the two edges to each other, the later in a welding device would have to be compensated, so that the resulting pipes in relative large tolerances become out of round.

The invention is therefore based on the object of a method and a device for producing a tube, in particular for a tube with a small wall thickness, made of metallic strip material, with a relatively small diameter, of the type mentioned at the beginning create what the edges to be welded with the greatest possible Accuracy meet before the welding device, so that pipes can be manufactured precisely.

The method defined at the beginning serves to solve this task claim 1.  

So it becomes the workpiece while it is being deformed by a belt first twisted into a tube after the first deformation steps, so that the edges forming the undercut are no longer opposite stand up from the original course, but lie aside, so that the roles attacking them on the outside, like the previous ones Forming rolls, have horizontal axes and can be driven, which significantly improves the precision of the further deformation in the feed benefits. This means that scoring can also occur on the outside of the pipe caused by the different peripheral speeds non-driven side rollers with vertical axes as far as possible be avoided. In addition, arises in the workpiece a certain tension leading to a very precise location, in particular the edges, contributing so that their movement towards each other can be influenced accordingly.

If the slit is narrow enough in this way, the previous one becomes Partial rotation reversed, so that afterwards the resulting one very precise slot between the edges in the usual way can be welded shut. Trials have shown that on this A ratio of pipe diameter to wall thickness of 7: 1 to 80: 1 is possible. The pipe diameters range from just 3 mm to almost 40 mm possible with wall thicknesses of approximately 0.15 mm to 1 mm. Here results there is also a high precision of the outer diameter in a very low tolerance range. Thus, in this procedure Cold formed tubes with high precision and high Ge speed are produced.

It is useful if the workpiece in the second Is rotated back by the same angle by which it is previously twisted on the first turn. So that has Workpiece in the end practically again the position that a conventional also has a workpiece formed into a tube, only during the deformation a twist first in one and then again in the opposite direction. But this enables the advantageous and expedient deformation by means of driven  Form rollers also in an area where the undercut has already increased so that a form roll no longer in the approximately C-shaped cross section of the workpiece for further deformation and can interfere with curvature.

It is therefore expedient if after the first rotation section on the Mold rollers attacking the workpiece are driven around horizontal axes and the workpiece as it continues to deform Form rolls is pushed in the feed direction. Since so far in this area and degree of deformation on a workpiece outside attacking form rollers with their axes of rotation transverse to the previous form rolls had to be oriented, they were normally without drive and were therefore unable to feed anything contribute. This not only resulted in less accuracy, but also could also lead to traces on the outside of the pipe which its feed practically sets these rollers in rotation had to. Since these form rolls now also around horizontal axes can be driven with the previous ones Form rollers are driven together easily, which also Feed positively influenced.

The form rollers behind the second turning section also rotate around horizontal axes and pull the workpiece in Feed direction. So it is in this area of the Form rollers actively moved in the feed direction, which is the quality of the Manufacturing benefits.

The drives of the driven form rollers can thus be synchronized be, the synchronization is carried out in particular mechanically. This allows the peripheral speeds of the form rollers Requirements of the workpiece and its material in the best possible way to adapt in the sense that a tube of high quality is created.

The torsion angle in the course of the first turning section and the second Rotation distance can be selected between 75 ° and 100 °. So it is  possible to predefine a torsion angle or even to set it to make adjustable so that it can be adjusted from case to case different ratios and / or materials and / or dimensions can be adjusted.

The device used to solve the problem mentioned at the beginning relates to claim 7.

A device is therefore proposed in which - of the Turning devices apart - all pairs of rollers parallel, horizontal Can have axes of rotation, so that they are also driven synchronously can. Accordingly, not only is the deformation accurate, but also also the feed of the originally band-shaped workpiece, see above that it is appropriately controlled to a tube of high accuracy can be deformed even if this pipe is only a small one Wall thickness and possibly only a small diameter Has. Experiments have shown that the edges are so precise move to each other, that a correspondingly accurate welding without special welding slot control, even by means of laser welding is possible. This takes advantage of the fact that the torsion Workpiece and thus the slot under a certain tension  stand so that they maintain a correspondingly precise location.

The first rotating device and / or the second rotating device can have at least one pair of rollers, one roller an annular groove and its other role has a matching ring projection point, the axes of rotation of these rollers transversely and approximately around the Angle of rotation of the workpiece compared to the previous pairs of rollers are arranged pivoted, the workpiece with its up reached at this point cross section between the ring groove and fits the annular projection. The user must therefore Workpiece, if the end face of this pair of rollers the turning Direction reached twisted accordingly, after which it is from this pair of rollers of the rotating device in the twisted accordingly or again turned back position is held so that the subsequent part of the workpiece the desired torsion and / or reverse torsion. The rotating device is therefore practical a bracket formed by two rollers, through which the Partially shaped tube in a certain position is fixed during the further run, namely in the ab this twisted location. The pair of roles used for this purpose represents a structurally simple additional solution and does not require any own drive, but could of course also have its own drive exhibit.

For optimization or to adapt to different ones Workpieces and materials can be made from at least one of the work piece of positively capturing pair of rollers existing turning device direction and in particular the pair of roles with regard to orientation the axes of rotation can be pivoted transversely to the feed direction and be ascertainable. This means that it can be used for pipe production Preselected torsion angles within appropriate limits and be set.

The swivel angle for the rotating device can be about 25 °, in particular about 3 ° to 10 °, adjustable and can be opposite  the axes of rotation in the feed direction before the turning distance located axes of rotation between 75 ° and 100 °, in particular approximately 80 ° to 90 °.

Further refinements of the device, in particular with regard to the number of pairs of rollers in front of or behind the rotation Stretch are the subject of claims 11 to 13. They give purpose moderate numbers and arrangements, on the one hand with as possible little, but on the other hand enough pairs of roles one precise deformation of an originally flat band, for example made of steel, to a tube in particular with a wall thickness, for. B. of less than 1 mm, so that a precise welding of the Edges is possible, which results in a tube of high precision, so that this may even be suitable for making cannulas from it.

Even better edge training and precision in the area of late Ren weld seam can be achieved if the first pair of rollers Bending the edges of the workpiece a pair of rollers for rolling on Edges of the edges is upstream (claim 14). Leave with it the edges before the actual bending with great accuracy bring to a uniform shape, which at the same time when shooting bending of the workpiece the different degrees of deformation the inside and outside are taken into account, so a corresponding precise gap with optimal geometry at the two edges bending for the subsequent welding process.

Below is an embodiment of the invention based on the Drawing described in more detail. It shows in some cases very schematized representation:

Fig. 1 is a side view and

Fig. 2 is a plan view of an inventive device with pairs of forming rollers in the feed direction and Between the seats arranged rotary systems with rotating devices for an originally band-shaped workpiece which extends in the feed is formed into a tube,

Fig. 3, the individual pairs of rollers from the first entry of the workpiece into the apparatus until completion including also a calibration, wherein the individual shaping rollers are shown only with the mutually facing halves from their center lines and have the same numbering as in Fig. 1 and 2,

FIG. 4 each of an originally band-shaped raw material up to the finally formed tube, wherein the Arbeitsvorschritt in Fig. 4 extends the cross-section of the workpiece in the progress of deformation from bottom to top,

Fig. 5 on an enlarged scale compared to Fig. 3 and in longitudinal section, the shape of the pairs of rollers in their effective area on the workpiece, the deformation step is shown in two columns from top to bottom, starting in the left column from the top from a flat band over several forming steps, which are continued in the right column from top to bottom,

Fig. Saw 6, a first rotary device counter to the advancing direction, ie in the direction of arrow "A" in Fig. 7,

Fig. 7 is a side view of the rotary apparatus of FIG. 6,

Fig. 8 is a view corresponding to FIG. 6 of a second rotating device in the direction of advance in the direction of arrow "B" in Fig. 9 and

Fig. 9 is a side view of the second rotation device according to Fig. 8.

A device designated as a whole by 1 is used to produce a tube 2 from metallic strip material 3 , hereinafter also referred to as “workpiece 3 ”, the device 1 being suitable due to the features and details described below, tubes with a relatively small diameter and relatively smaller To produce wall thickness.

For this purpose, the device 1 has a plurality of roller pairs 01 , 02 , 03 and 04 arranged one behind the other in the feed direction of the workpiece 3 and in the feed direction according to the arrow Pf1 in FIG. 2 at a distance from it roller pairs 05 and 06 and at a further distance from roller pairs 07 and 08 and further 09 and finally pairs of rollers 10 to 13 for calibration, with which a gradual deformation with increasing curvature of the edges 4 of the workpiece 3 in the course of the feed is carried out, this stepwise deformation being indicated in FIG. 4 in a schematic representation from bottom to top. So, It can be seen in Fig. 4 in the bottom view of the outlet cross section of the web-shaped workpiece 3, which is more and more deformed in accordance with the cross-sections is located above and in accordance with the allerober most of these schematic cross-sectional views of the pipe 2 is formed.

Referring to FIG. 3 and 5 are first pairs of rollers 01 and 04 - referred to in the art as "stitch 01" to "stitch 04" - provided which engage simultaneously at top and bottom of the workpiece 3, whereas in the area in which the Curved edges 4 form the undercuts 5 indicated in FIG. 4, pairs of rollers 05 and 06 are designed and arranged in such a way that their rollers engage on the outer sides of the curved edges of the workpiece 3 , as is particularly evident in FIG. 5 in the "stitch" 05 "and a" stub 06 "individual treatments designated be seen, and in addition cross-between the edges of support rollers 05 a and 06 a indicated in Fig. 5.

In this case, one 5 in conjunction with Figure 4 1 recognizes especially in Fig.., That the workpiece 3 by almost a quarter turn is twisted between the "stitch 04" and the "stitch 05" and in Fig. And 2 can be seen between the Roller pairs 04 and 05 also have a corresponding distance, which serves as the first turning distance for this torsion process, in which a first turning device 6 is arranged, which in FIGS . 6 and 7 is again separate and with regard to its shaping rollers within FIG. 5 as "stitch 04 / 05 "is shown.

Behind this first rotating device 6 are the already mentioned pairs of rollers 05 and 06 whose rollers engage on the outer sides of the curved edges 4 of the workpiece 3 . Since these quarters takes place between the roller pair 04 and the roller pair 05 rotation of the workpiece 3, the pairs of rollers can be located 05 and 06 with their axes of rotation parallel to the rotational axes of the pairs of rollers located before the rotation zone 01-04 and as shown in FIG. 2 is driven via driving gear 7 in synchronism be so that the form rollers pairs 01 to 04 and the form roller pairs 05 and 06 can have a common drive with the gears 7 and a motor 8 , so the workpiece 3 is also subjected to a feed in the area in which the form rollers on the outside of the curved edges 4 attack and no longer hold the workpiece 3 between itself, as in the roller pairs 01 to 04 .

In the feed direction behind these forming rollers, which serve to reduce the distance between the edges 4 to be bent towards one another, a further or second turning path can be seen with a turning device 9 , with which the workpiece is twisted back or turned back, after which in the exemplary embodiment two further pairs of rollers 07 and 08 for final approximation follow the edges 3 for the welding process. The tool sets 09 are expediently upset rollers, while the roller pairs 10 to 13 serve for the final calibration of the tube 2 .

The first rotating device 6, and also the second rotary device 9 are shown in FIGS. 6, 7 and 8 and 9 and also in FIG. 5 are each a pair of rollers consisting of two rollers 61 and 62 or 91 and 92, the roller 61 according to FIG. 6, an annular groove and the other roller of the first rotary device 6 having a matching annular projection 62 and the rotation axes 63 of these rolls 61 and 62 cross and are arranged approximately pivoted about the angle of rotation of the workpiece 3 with respect to the preceding pairs of rollers. It is indicated in Fig. 5 that the workpiece 3 with its cross section fits between the annular groove and the annular projection of these rollers 61 and 62 and is thus positively held and fixed in the rotated position, although at the same time a feed takes place.

Of FIG and the roller 91 has. 8 5 an annular groove, while the roller 92 has a projection engaging in the workpiece at the slot annular projection which is also disposed in an annular groove around the matched since the final tube cross section of the workpiece 3 to take into account of FIG. 5, stitch 06/07.

In both rotating devices 6 and 9 , the workpiece 3 is thus held in a form-fitting manner against the previous twisting and torsion, so that the twisting or torsion occurs gradually at all cross-sectional areas of the workpiece and the workpiece is deformed according to the feed.

It is indicated in FIG. 6 as well as in FIG. 8 that the rotating device 6 and 9 consisting of a pair of rollers positively gripping the workpiece 3 and in particular their respective roller pair with respect to the orientation of the axes of rotation 63 and 93 transversely to the feed direction according to arrow Pf1 is pivotable and lockable, wherein for the first rotating device according to FIG. 6 in the embodiment, for example, a pivoting angle of 8 ° and for the second rotating device 9 according to FIG. 8, a pivoting angle of 4 ° is indicated. Thus, the torsion of the workpiece 3 in the course of the rotation between the pairs of rollers or stitches 04 and 05 can also be corrected or adjusted from case to case and adapted to the workpiece, its dimensions and its material.

The swivel angle for the workpiece 3 within the rotating device 6 and likewise in turn in the rotating device 9 can, however, also be changed over a larger angle difference or - if the angle of rotation always remains the same - be different. Rotation angles of approximately 75 ° to 100 ° and in particular approximately 80 ° to 90 ° or - as in the exemplary embodiments - deviations of 90 ° which are smaller than 10 ° are conceivable.

Figs. 1 and 2 show that a first set of roller pairs of the "stitch 01" to "stitch 04" for the first deforming the edges 4 and its bending relative to the starting position of the workpiece 3 designed as a sheet metal strip up to the rotation zone with the first rotating device 6 comprises four pairs of rollers. It has been shown that this is a favorable number of forming rollers in order to prepare the sheet metal strip so far and to deform it with respect to the cross section that it is then to be recorded for the further deformation outside the curvatures of the edges, but before that by about a quarter Rotation is twisted.

In the exemplary embodiment, behind the first rotating device 6 , two pairs of rollers 05 and 06 are arranged to bring the edges 4, which are curved in cross-section, towards one another and behind the second rotating device 9 . The pairs of rollers 07 and 08 behind the second Drehvor direction 9 also have rollers rotating about horizontal axes. It is then followed by upsetting rollers 09 , which can also rotate about vertical axes. In the further course of the feed, a calibration part with the roller pairs 10 to 13 and finally the welding device 14 then follow.

In Fig. 1 and 2, it also recognizes that a first pair of rollers 100 is formed before the subsequent pairs of rollers 01-04 slightly different. This is the pair of rollers, which is labeled "in front of stitch 01 " in the top left column in FIG. 5 and is also indicated schematically in FIG. 3. The first pair of rollers 01 for bending the edges 4 of the workpiece 3 is preceded by this pair of rollers and is used to roll the edges of the edges 4 , so that after bending the cross section to form a circle, despite the different radii of curvature of the inside and the outside of the workpiece, they are narrow , form an approximately constant gap with one another practically over the entire material thickness, which facilitates welding.

With the device 1 described above, a tube 2 can be produced from a workpiece 3, which is initially in the form of a flat strip material, in a plurality of forming stations and roller pairs located one behind the other in the conveying direction, by the edges 4 of the workpiece 3 being bent more and more in the feed direction and curved toward one another. This happens first in the role pairs 01 to 04 .

If the edges 4 are curved so far that they form an undercut 5 , the partially already curved and shaped work piece 3 is twisted in a first rotational path about a quarter turn and then further deformed to the tube 2 , the between the edges 4 located slot is reduced in the further course of the feed according to FIGS. 4 and 5, wherein initially appropriate annular guide projections can still NEN engage in the slot. Before the final closure and welding of the slot delimited by the edges 4 , the workpiece 3 is rotated back in a second rotational path - by means of the second rotating device 9 , after which the edges 4 are then finally welded to one another. If necessary, a calibration can also take place beforehand.

The workpiece 3 can be rotated back in the second rotary section by means of the second rotary device 9 by approximately the same angle by which it is previously twisted on the first rotary section by means of the first rotary device 6 . In order to deform the edges 4 towards one another except for a small slot width, the workpiece is rotated in relation to its normal orientation during its advance, which is possible due to the length of the turning distances and the elasticity of the material of the workpiece 3 .

In an advantageous manner can after the first rotation zone of the workpiece 3 attacking forming rollers 05 and 06 rotate about horizontal axes and are driven so that the workpiece is pushed in the direction of its further deformation of these shaping rollers 05 and 06. 3

The form rollers 07 and 08 behind the second rotary section also rotate about horizontal axes, are driven and pull the workpiece 3 in the feed direction, so that practically all form rollers of the device 1 also ensure the feed and further transport of the workpiece. The drives of the driven shaping rollers before and after the shooting distances are driven synchronized thereby, as shown schematically in Fig. 2 by the gear 7 and the motor 8 and the output drives 7a and a connecting shaft 7 b between the two gears 7 indicated is. Only the calibration part with the calibration rollers 10 to 13 in turn has its own motor 81 and an associated gear 71 .

Depending on the workpiece and the dimension, the torsion angle can be selected and set in the course of the first rotation section and accordingly also in the second rotation section. In the exemplary embodiment, a variation of this angle by 8 ° is indicated in FIG. 6, such a variation by 4 ° in FIG. 8.

To produce a tube 2 from a originally flat in cross-section, band-shaped workpiece 3 , this is curved in several successive, formed by forming roller pairs forming stations step by step stronger in cross-section until the tube shape is reached. If the edges 4 of the workpiece 3 are curved so far that they each form an undercut, that is to say mold rollers can no longer engage to such an extent that they can continue to shape the inside of the cross section, the partially shaped workpiece 3 becomes approximately in a first rotational path twisted a quarter turn and further deformed in this twisted position in the further feed so that the slot located between the edges 4 is reduced in the further feed course. Before the slot is finally approached or closed and welded, the workpiece 3 is rotated back in a second rotational path, after which the edges 4 are welded.

Claims (14)

1. A method for producing a tube ( 2 ), in particular for a tube with a small wall thickness, made of metallic strip material, with a relatively small diameter, the initially flat strip material being cold-formed into the tube in a plurality of forming stations behind one another in the conveying direction by the Edges ( 4 ) of the strip material are bent and curved towards one another more and more, the slot between the edges being reduced in the further course of the advance and the deformation and finally being finally closed and welded, characterized in that when the edges ( 4 ) are curved so far that they form an undercut ( 5 ), the partially shaped workpiece ( 3 ) is twisted in a first rotational path by about a quarter turn and then deformed further, and that the workpiece before the final closing and welding of the slot ( 3 ) back in a second turn r rotates and then the mutually moving edges ( 4 ) are welded.
2. The method according to claim 1, characterized in that the workpiece ( 3 ) is rotated back in a second rotational path about the same angle by which it is twisted beforehand on the first rotational path.
3. The method according to claim 1 or 2, characterized in that after the first rotational path on the workpiece ( 3 ) acting form rollers ( 05 , 06 ) are driven about horizontal axes and the workpiece ( 3 ) in its further deformation of this form roller ( 05 , 06 ) is pushed in the feed direction.
4. The method according to any one of claims 1 to 3, characterized in that form rollers ( 07 , 08 ) behind the second rotary section also rotate about horizontally lying axes and pull the workpiece ( 3 ) in the feed direction.
5. The method according to claim 3 or 4, characterized in that the drives of the driven form rollers before, between and be driven synchronized after the turning distances.
6. The method according to any one of claims 1 to 5, characterized records that the torsion angle during the first Rotation distance and / or the second rotation distance between 75 ° and 100 ° is set.
7. Device ( 1 ) for producing a tube ( 2 ), in particular for a tube with a small wall thickness, made of metallic strip material ( 3 ), with a relatively small diameter, with several pairs of rollers ( 01 ) arranged one behind the other in the direction of advance of the workpiece ( 3 ) 02 , 03 , 04 ) for the gradual and then increasing cold deformation and curvature of the edges ( 4 ) of the workpiece ( 3 ) towards each other in the course of the feed, the first pairs of rollers ( 01 to 04 ) acting on the top and bottom of the workpiece ( 3 ) and in the area , in which the curved edges ( 4 ) form undercuts ( 5 ), pairs of rollers are provided which act on the outer sides of the curved edges, and with a welding device ( 14 ), characterized in that between the pairs of rollers acting on both sides of the workpiece and the pairs of rollers attacking on the outside of the curvatures, a rotating section and a first rotating device ( 6 ) for the Tordi eren of the workpiece by about a quarter turn and behind it are arranged on the outside of the curved edges ( 4 ) engaging pairs of rollers with axes of rotation, which are parallel to the axes of rotation of the rollers located in front of the turning section and turning device, that these arranged behind the turning section form rollers the drive are connected and that in the feed direction behind these to reduce the distance between the edges to be bent edges ( 4 ) serving form rollers a further rotational path and a second Drehvor direction ( 9 ) for twisting and turning back the workpiece ( 3 ) and behind it at least one pair of rollers Approaching the edges of the workpiece ( 3 ) are arranged for the welding process.
8. The device according to claim 7, characterized in that the first rotating device ( 6 ) and / or the second rotating device ( 9 ) have at least one pair of rollers, one roller ( 61 ) an annular groove and the other roller ( 62 ) a matching ring projection have, the axes of rotation ( 63 ) of these rollers ( 61 , 62 ) being arranged transversely and pivoted approximately by the angle of rotation of the workpiece ( 3 ) relative to the preceding pairs of rollers, and that the workpiece ( 3 ) with its cross section between the annular groove and the annular Head start fits.
9. Apparatus according to claim 7 or 8, characterized in that the existing from at least one workpiece ( 3 ) positively detecting roller pair of rotating device ( 6 ; 9 ) and in particular the pair of rollers with respect to the orientation of the axes of rotation transverse to the feed direction (Pf1) pivotable and lockable is.
10. The device according to claim 9, characterized in that the pivot angle for the rotating device ( 6 ; 9 ) by about 25 ° or about 3 ° to 10 °, is adjustable and relative to the axes of rotation of the axes of rotation located in the feed direction in front of the rotational path between 75th ° and 100 ° or about 80 ° to 90 °.
11. Device according to one of claims 7 to 10, characterized in that a first set of pairs of rollers for the first curving and deforming the edges with respect to the starting position of the workpiece designed as a sheet metal strip ( 3 ) up to the rotation distance three to six, preferably four or five pairs of rollers.
12. The device according to one of claims 7 to 11, characterized in that behind the first rotating device ( 6 ) at least two pairs of rollers ( 05 , 06 ) for approaching the curved edges ( 4 ) towards one another and behind the second Drehvor direction ( 9 ) are arranged .
13. The device according to one of claims 7 to 12, characterized in that the pairs of rollers behind the second rotating device ( 9 ) partly around horizontal, partly rotating around vertical axes and behind it the welding device ( 14 ) is arranged.
14. Device according to one of the preceding claims, characterized in that the first pair of rollers used for bending the edges ( 4 ) of the workpiece ( 3 ) is preceded by a pair of rollers for rolling the edges of the edges ( 4 ).
DE1998134400 1998-07-30 1998-07-30 Method of making thin wall tubes Expired - Fee Related DE19834400C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998134400 DE19834400C1 (en) 1998-07-30 1998-07-30 Method of making thin wall tubes

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE1998134400 DE19834400C1 (en) 1998-07-30 1998-07-30 Method of making thin wall tubes
AT99109817T AT222149T (en) 1998-07-30 1999-05-19 Method and device for producing a tube from tape material
DE59902324A DE59902324D1 (en) 1998-07-30 1999-05-19 Method and device for producing a tube from strip material
DK99109817T DK0976466T3 (en) 1998-07-30 1999-05-19 Method and apparatus for producing a tube of tape material
EP99109817A EP0976466B1 (en) 1998-07-30 1999-05-19 Method and device for the manufacture of a tube from strip material
ES99109817T ES2182429T3 (en) 1998-07-30 1999-05-19 Procedure and device for the manufacture of a band material tube.

Publications (1)

Publication Number Publication Date
DE19834400C1 true DE19834400C1 (en) 2000-01-05

Family

ID=7875876

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998134400 Expired - Fee Related DE19834400C1 (en) 1998-07-30 1998-07-30 Method of making thin wall tubes

Country Status (5)

Country Link
EP (1) EP0976466B1 (en)
AT (1) AT222149T (en)
DE (1) DE19834400C1 (en)
DK (1) DK0976466T3 (en)
ES (1) ES2182429T3 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10007496C1 (en) * 2000-02-18 2001-04-26 Dreistern Werk Maschinenbau Gmbh & Co Kg Metal profile manufacturing line has profiling machine with rolling tools and welding device with single energy source coupled to at least 2 welding heads
DE10226517C1 (en) * 2002-06-14 2003-10-30 Dreistern Werk Maschinenbau Gmbh & Co Kg Hollow profile manufacturing method has metal band welded across open side of open profile formed from metal band of varying width
DE102005022244A1 (en) * 2005-05-13 2006-11-16 Eroform Edelstahl Gmbh Guidance and deformation system
DE102006027046B3 (en) * 2006-06-10 2007-11-22 Lemuth Gmbh Device for the production of a pipe comprises cylindrical rotating rollers running parallel to a molding roller to exert a force in this direction
WO2008014740A1 (en) 2006-08-01 2008-02-07 Eroform Edelstahl Gmbh Suspension for a laser welding unit
US7584639B2 (en) 2003-06-27 2009-09-08 Crebocan Ag Method and device for the production of a can body, and can body
US7670094B2 (en) 2004-01-15 2010-03-02 Crebocan Ag Method and device for producing a can body and can body
DE102009056324A1 (en) 2009-12-01 2010-07-01 Dreistern Gmbh & Co. Kg Method for lengthwise formation of metal strip or initial profile for producing metal profile in form of e.g. pipe, involves broadening recess with other recesses in roll forming tool, to generate forming region along elastic line
DE102009007701A1 (en) * 2009-02-05 2010-08-12 Audi Ag Closed profile i.e. hollow profile, manufacturing method, involves separating overlapping against separating-counter support, and making closed profile from material band by form-fit connection of abutting edges to form butt joint
WO2011018061A1 (en) * 2009-08-10 2011-02-17 Willy Kreutz Gmbh & Co. Kg Contact pin for use on illumination means and method for the production thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10316336A1 (en) * 2003-04-10 2004-11-04 Dreistern-Werk Maschinenbau Gmbh & Co. Kg Method and device for producing a closed metal profile or metal tube with wall thickness varying in the longitudinal direction
CN102847744A (en) * 2012-09-20 2013-01-02 上海和达汽车配件有限公司 Manufacture method for opening pieces of tubes in different wall thicknesses
CN106031936B (en) * 2015-03-13 2018-01-19 奇昊汽车系统(苏州)有限公司 A kind of manufacture production method of supporting sleeve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529160A1 (en) * 1985-08-14 1987-02-26 Nippon Steel Corp Form rolling apparatus
DE3220029C2 (en) * 1981-05-29 1988-02-04 Nippon Steel Corp., Tokio/Tokyo, Jp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3101401A (en) * 1957-07-25 1963-08-20 Schlotterer Gustav Method for the manufacture of hollow bodies
JPS5337308B2 (en) * 1976-11-16 1978-10-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220029C2 (en) * 1981-05-29 1988-02-04 Nippon Steel Corp., Tokio/Tokyo, Jp
DE3529160A1 (en) * 1985-08-14 1987-02-26 Nippon Steel Corp Form rolling apparatus

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10007496C1 (en) * 2000-02-18 2001-04-26 Dreistern Werk Maschinenbau Gmbh & Co Kg Metal profile manufacturing line has profiling machine with rolling tools and welding device with single energy source coupled to at least 2 welding heads
EP1125652A1 (en) * 2000-02-18 2001-08-22 Dreistern-Werk Maschinenbau GmbH & co. KG Welding apparatus and method for longitudinally seam welding of profiles formed from a metal strip
DE10226517C1 (en) * 2002-06-14 2003-10-30 Dreistern Werk Maschinenbau Gmbh & Co Kg Hollow profile manufacturing method has metal band welded across open side of open profile formed from metal band of varying width
US7584639B2 (en) 2003-06-27 2009-09-08 Crebocan Ag Method and device for the production of a can body, and can body
US7670094B2 (en) 2004-01-15 2010-03-02 Crebocan Ag Method and device for producing a can body and can body
DE102005022244A1 (en) * 2005-05-13 2006-11-16 Eroform Edelstahl Gmbh Guidance and deformation system
DE102005022244B4 (en) * 2005-05-13 2007-07-19 Eroform Edelstahl Gmbh Guiding and deformation system, its use and method of making welded pipes
US8829384B2 (en) 2005-05-13 2014-09-09 Wuppermann Edelstahltechnik Gmbh Guiding and shaping system
DE102006027046B3 (en) * 2006-06-10 2007-11-22 Lemuth Gmbh Device for the production of a pipe comprises cylindrical rotating rollers running parallel to a molding roller to exert a force in this direction
WO2008014740A1 (en) 2006-08-01 2008-02-07 Eroform Edelstahl Gmbh Suspension for a laser welding unit
DE102006035702A1 (en) * 2006-08-01 2008-02-21 Eroform Edelstahl Gmbh Suspension for a laser welding machine
DE102009007701A1 (en) * 2009-02-05 2010-08-12 Audi Ag Closed profile i.e. hollow profile, manufacturing method, involves separating overlapping against separating-counter support, and making closed profile from material band by form-fit connection of abutting edges to form butt joint
DE102009007701B4 (en) * 2009-02-05 2011-02-17 Audi Ag Method for producing a closed profile from a flat strip of material by roll forming
WO2011018061A1 (en) * 2009-08-10 2011-02-17 Willy Kreutz Gmbh & Co. Kg Contact pin for use on illumination means and method for the production thereof
DE102009056324A1 (en) 2009-12-01 2010-07-01 Dreistern Gmbh & Co. Kg Method for lengthwise formation of metal strip or initial profile for producing metal profile in form of e.g. pipe, involves broadening recess with other recesses in roll forming tool, to generate forming region along elastic line

Also Published As

Publication number Publication date
AT222149T (en) 2002-08-15
DK0976466T3 (en) 2002-12-16
ES2182429T3 (en) 2003-03-01
EP0976466A2 (en) 2000-02-02
EP0976466B1 (en) 2002-08-14
DK976466T3 (en)
EP0976466A3 (en) 2000-10-18

Similar Documents

Publication Publication Date Title
EP1591174B1 (en) Bending device for bar and tube-shaped workpieces
US3538728A (en) Method and apparatus for producing flexible metal ducts
JP5689776B2 (en) Method for producing continuous tubing and hot rolling mill
US20170136513A1 (en) Apparatus and method for producing a tailored sheet metal strip or metal profile
US4769522A (en) Method and apparatus for laser beam welding of longitudinal seams in container bodies
US2282176A (en) Method and apparatus for forming helical lock seam pipe
AU2009254199B2 (en) Method for producing a large steel tube
US5756167A (en) Rigid elongated member for use in vehicles and producing method and apparatus therefor
JP5080966B2 (en) Production line and method for forming profiles
EP1820577A1 (en) Apparatus for manufacturing profiles with axially variable cross-section and profiles manufactured by this apparatus
JP2008514429A (en) Method and apparatus for producing a longitudinally welded hollow profile
CN1165392C (en) Tube shaping equipment using tube bending roll, its shaping method and tube
DE10011755B4 (en) Method and device for producing a profile with variable cross-section over the longitudinal axis by roll forming
JP5033120B2 (en) Production line and method for forming and processing profiles
US7107682B2 (en) Method for manufacturing tubes and profiles
US20040093927A1 (en) Adjustable corrugation apparatus and method
GB1562847A (en) Method and apparatus for manufacturing metal pipe
EP2674279B1 (en) Method for roll bending a profile, profile, method for manufacturing curved profile workpieces, curved profile workpiece, device for roll bending a profile as well as an extruded and roll bending line
CN101965260B (en) Forming apparatus, template thereof and forming method
CN105033125A (en) Titanium alloy equal-thickness thin-wall special-shaped annular piece rolling and expanding composite forming method
KR101593930B1 (en) Method for bending pipes rods profiled sections and similar blanks and corresponding device
US20070074556A1 (en) Continuous process of roll-forming stamped sheet
US3452568A (en) Apparatus for continuous forming of strip material
JP5382267B1 (en) Method for producing section steel whose cross-sectional shape changes in the longitudinal direction and roll forming apparatus
US3940962A (en) Conduit making machine with diameter control and method

Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee