DE2222376A1 - Method and device for producing ribs on the outer surface of pipe material - Google Patents

Description

PA TENTAN CHOOSE

PATENTANWALTDIPU-ING ₁ R ₁ MOLLER-BORNEr PATENTANWALT DIPL-ING. HANS-H. WEY

BE RLI N-DAHLEM 33 PO D BI ELSKIAlLE E 68 8MONCHEN22-WIDENMAYERSTRASSE49

TEL. 0311. 762907 TELEGR. PROPINDUS. TELEX 0184 057 TEL. 0811. 225585. TELEGR. PROPINDUS TELEX 0524244

24 395

OHASB BRASS AND COPPER CO., IITO. Cleveland, Ohio, V.St.A.

Method and device for producing ribs on the outer surface of pipe material

The invention relates to methods and apparatus for creating ribs on the outer surface of tubing of indefinite length.

It is well known that -the- presence-of ribs or other surface deformations by which the surface area of the outside of a pipe is increased the heat transfer properties of the tube, and therefore, finned tubes on the outside thereof are widely used in heat exchangers. To Now, however, only pipe sections with a limited and relatively small length can be provided with such ribs, It is common to use an elongated mandrel held by one end to place the hipped Kohr on the horn and then to provide the ear with hips while the ear in

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is moved in the axial direction with respect to the mandrel and a head generating the ribs. In these known devices it is necessary that the mandrel has at least the same length as the tube to be provided with fins. Of course, these known devices do not operate continuously, since it is necessary to start with the creation of ribs at one end of the tube and to finish this process when reaching the other end of the tube, after the tube has been ribbed over its entire length _o Then the device must be loaded with a new pipe section, which is then processed in the same way. Since these stoppages are unavoidable, finned tubes are quite costly to manufacture. In addition, it is common for the washers of the head used to create the fins to be damaged when they are initially pushed against the tube material. It is also known that when the head is initially brought into engagement with the tube to create the ribs, ribs of the desired depth are not created at that end of the tube. In many cases, it is therefore necessary in the case of each pipe section which has been ribbed with the aid of known methods and devices to cut off a part at least several centimeters long from the pipe, so that pieces of waste are produced.

You also need some heat exchangers Pipe material that has a length that is considerably greater than the length of pipes made using known methods and devices can be ripped, therefore it is often inevitable to manufacture several pieces in one piece To connect finned tubes together when a heat exchanger is assembled v / ground should be foolche connections are of course undesirable because most of the damage occurs at the joints and because of the cost of one such "heat bulbs" as a result of the upgrade for the manufacture the connection points increase considerably.

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These "occurring difficulties in the known devices are eliminated according to the invention in that a device has been created which makes it possible to continuously ribbed pipes of indefinite or arbitrary length. The only restriction on the length of the pipe to be finned is through Given the length of the pipe material that is available for processing with the aid of the method and device according to the invention _o According to the invention, however, it is also contemplated that the device according to the invention for ribbing pipes operated in conjunction with a VaIζvorrichtung for producing seamless pipes In this case, there is no limit to the length of the pipe material to be processed, and as long as the rolling device is producing pipe material, the pipe material can be continuous h be ribbed.

When using the method according to the invention becomes non-magnetic pipe material with a small diameter from about 16 to 25 mm continuously fed from a reel or other source from a ribbing head, and the outer surface of the tubing is finned in one continuous operation the pipe material is fed from a reel or a roll, the pipe material with a length of e.g. approx 15Om contains. The pipe material is unwound, straightened, fed to the ribbing head and either rewound after the ribs have been produced or when leaving of the rib head divided into straight sections of the desired length.

The rib head is designed so that it with the Outer surface of the tubing cooperates and rotates around the axis of the tubing at a point at which an anvil or scraping tool that is attached to the mandrel is arranged in the tube. The rib head is

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Equipped with several grooved or mutually overlapping ν «al ze η, which are pressed into the outer mouth of the ear to the ear through an .extrusion or Rolling curtain with helical tilts of the desired height to be provided During this felting process, the thread is pressed together in a radial direction against the support tool connected to the mandrel. Simultaneously, aas nohr is moved axially with respect to the ribbing head, so that a coherent scarring line is produced on the outside of the xiohrs. to move the κ / üützwerkzeug together with the iCohr in an axial direction. ü.a solclie undesired displacement crunp; and is held against axial Lewegunp by electromagnets that the itohr and the mandrel at a front of the _Yerrippuni; lying sl "opf point encloses _o-J.'en the mandrel and formed in a novel way .i .lektiOmagnete that Losing an axial movement of the horn is an important feature of the J ^ rfdndungo

in xnbetj iebsetzung the verriprjungsvorrichtuni j £> t it of course first necessary to the mandrel in the j.ohr eJnzuführen _o thereon weraen the mandrel and btützwerkzeug in the ivo) ir in uie richti {] e Lvp: c geLracJjt, and The mandrel is aligned with several I agnete, which secure the mandrel against an axial displacement, whereby the support works accordingly in the transverse direction in l'luchtunfi; with the "verrippungswalzen of Verrippungskopfes is maintained. When -L-.infuh.ren the mandrel and also a lubricant pressed into the otützwerkzeugs hr bo v / ith the interior of the K'ohrs so that the Heibung between the supporting tool and the In some cases, a swivel joint between the magnetically held part of the

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Doms and the support tool be present, irieses swivel joint enables the Stübzwerkzeug to adjust according to the advancing helical lines! 'shaped deformation of the Hohrs, which rests against the support tool: to rotate while the ribbing head rotates to close the liohr with hips provided without turning the mandrel.

In the preferred embodiment of the invention, the ribbing head is driven by a hydraulic motor, the speed of which is regulated as a function of the position of the ribbing head relative to its normal axial position. The ribbing head is moved from its normal position in the direction of movement of the hohr a sensing device that a larger amount of pressure medium is supplied to the hydraulic motor in order to cause a corresponding increase in the speed of the hydraulic I-motor driving the ribbing head to move Eohrs opposite direction causes the I ¹ UhIvorrichtung that the rotational speed of the Verrippungskopfes is lowered. & been a hydraulic motor is used to regulate the speed of the Verrippungskopfes, but could also be other operating with variable speed motors, such as _e Electric motors, using "The described arrangement ensures that the linear speed with which the tube is advanced is always approximately the same as the axial speed at which the tube is provided with ribs or threads, and that the rib head is axially movable no noticeable acial forces between the ear and the teeth or the turns of the ribbing rollers.

Crf measure of the invention is thus a method for generating of hips on the outer surface of an ear material of indeterminate or arbitrary length, that of non-magnetic .-, ■ material and has at least one open end, and to carry out this procedure

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serves a device "with a rotatable Verrippurif: sl: opf having Btί tiun for producing butts; the Method according to the invention / comprises measures to make hearing material continuously along one of the ribbing head b en ac hb.'arten riahn to feed into the open .End of the Itohrmaterials a Introduce mandrel, which has a section which is composed of parts made of magnetic or »Urimsfnetischem material, as well as a section, eggs cooperating with the inner surface of the tube material Tool forms to keep the mandrel in alignment with several To arrange electromagnets, which enclose the Kohrmaterial and the mandrel and separate magnetic .Pole pieces that the outer surface of the Kohrmaterials next to and opposite the magnetic! 'hurry, of the thorn are axially offset in order to arrange the tool portion of the mandrel correspondingly close to the ribbing station in order to achieve the To bring Iiohrmaterial on its side facing away from the ötützwerkzeug in engagement with the ribbing head in order to To rotate the ribbing head about the axis of the Hohrmaterials while the Hohrmaterial is fed axially, wherein a Rotational movement of the Kohrmaterials is prevented, and to generate a magnetic flux outside the Kohrmaterials, which due to the axial displacement between the magnetic pole pieces of the electromagnets and the magnetic parts of the The mandrel is caused to alternate in the magnetic lines of the mandrel at various points distributed along its length ! dots to enter and exit these files, so that the mandrel is prevented from settling in the Hohrmaterial to move axially.

Further according to the invention is a device for producing ribs on a continuously moving Pipe of indefinite length has been created, to which several Combined devices include a device associated with the outer surface of the icohr cooperates to tilt the pipe, a means through which pipe material is drawn from a source of the ribbing device continuously and with a

'eschv / indigkeit is supplied, an in

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the year before the beginning of a.er .arzougunr of Kipocn oini'ühr-. Over the jor as well as several magnets, which extend the length of the movement path, along which the ear material moves in the direction of the rotation, and which work together with the horn in order to prevent axial movements of the fus; here the mandrel has a harvesting section which is arranged in alignment with the niagnets, and a second section, which forms a tool or an anvil, is connected to the first section and is arranged near the jamming device; to the first section aes uorns include several ^'±; rush of magnetic material and a plurality of' j rush from unmagrietischem material, the latter of which the i'eile keep magnetic material spaced from one another and so interconnected dijß, they can not perform any axial .bewegungen; the i. ; agnets are designed as -:. electromagnets and each provided with a coil and several magnetic pieces separated by gaps, the outer The surface of the IuObrmaterials close to btnachbaa ^ t and in longitudinal alignment with the existing magnetic material! 'parts of the mandrel are arranged. The magnetic pieces of the electronics and the magnetic parts of the horn are offset from one another in order to ensure that the magnetic flow alternates between the successive pieces of oil and the magnetic lines lengthways the xilektromagneten and the mandrel enter and re-enter them in order to increase the resistance which is opposed to an axial movement of the mandrel with respect to the electromagnet.

The invention and advantageous details of the invention are described below with reference to schematic drawings explained in more detail using an exemplary embodiment, it shows:

1a and 1b show the front of a rib-making device, with certain parts for the sake of clarity are drawn broken away;

i'ig, 2 the assignment of FIGS. 1a and 1b to one another;

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Fig. 3 in an enlarged vertical section, at the certain parts are drawn broken away, the electromagnets, the swivel joint of the mandrel and an element for Shapes of ribs;

Fig. 4 is a partial section along the line 4-4 in Fig. 5;

Fig. 5 in a partially drawn as a section Front view, with certain parts omitted, the assembly with the ribbing head;

Figo 6 in plan with the omission of a dust cover the ribbing head, the device for Control of the rotational speed and a device recognizes by which the device is automatically shut down, if the ribbing head performs too great an axial movement ;

7 shows further details of the ribbing head in longitudinal section it; and

8, with certain parts omitted, an end view of the ribbing head.

In Fig. 1a and Ib one recognizes an inventive Device for continuously producing a helical Rib on the outer surface of a tube of indefinite length. At one end of the designated total of 1 Device is a support 2 for receiving a roll or a roll 3 »from which the pipe material is fed to the ribbing device of the device.

The various parts of the device are arranged on racks or tables, which rest on the floor 4 of the building in which the apparatus is placed _E to the apparatus 1 include a first and a second feeding and straightening roller part 5 or "£, a magnetic part 7 »A third roller part 8, a rib expansion station 9

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as well as a station 10 for cutting to length and dispensing ribbed pipes β "

The first feed and straightening roller part 5 is arranged near the support 2 for the pipe material ₀ Part 5 includes two guide rollers 11 rotatable about horizontal axes, two transport rollers 12 rotatable about vertical axes and several pairs of rollers 13 rotatable about vertical axes, separated by longitudinal distances Straightening the pipe material 18 in a vertical plane _β As with respect to the rollers 12 from FIG. 3. 1a, all said rollers have a concave circumferential surface, so that a considerable part of the outer surface of the pipe material is covered by each roller.

From the roller part 5, the pipe material 18 arrives at the roller part 6, to which a plurality of upper rollers 14 and a plurality of lower rollers 15 belong. There are also two transport rollers 16 and 17. The rollers 14 are offset in the longitudinal direction with respect to the rollers 15, and all of these rollers rotate about a horizontal axis _o The rollers 14 and 15 work together to straighten the pipe material in a horizontal plane, while the transport rollers 16 and 17 move the pipe material in move lengthways. The transport rollers 12, like the transport rollers 16 and 17, are driven at a constant peripheral speed, so that the pipe material passing between them moves at a predetermined speed in the longitudinal direction through the device. If necessary, the guide rollers 11, the straightening rollers 13 and the straightening rollers 14 and 15 can also be driven in order to advance the pipe material. All of the rollers mentioned so far are adjustable in order to enable the position of the rollers and the size of the gap between the transport rollers to be set precisely.

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practice. An additional advantage of the adjustable rollers is that it is possible to adjust these rollers in order to adapt them to pipe materials of different diameters which are to be provided with tilting and whose diameter is, for example _, in the range from about 16 to 25 mm. The pipe material is fed through the device along a path indicated in Fig. 1a and 1b by the center line 19, and the various parts of the device are aligned with this center line.

The magnet part 7 consists of eight identical electromagnet 20 to 27 together, all of which have a substantially cylindrical shape and having a through central opening _e These electromagnets are arranged so that the axes aligned of their openings to the gaps between the roller pairs 11 to 17 As a result of this arrangement, the electromagnets delimit a channel along which the tubular material 18 moves in the axial direction during operation of the device. The construction of the electromagnets 20 to 27 is discussed in more detail below »

From the magnetic part 7, the pipe material 18 moves through a third oil part 8, to the three roller pairs 30, 31 and 32 belong. These reels act these are transport rollers which are of the same construction as those above in connection with the roller part 6 each roller in pairs 30 to 32 is driven, and these rollers have the task of to keep the part of the pipe material located in the magnetic part 7 in a substantially straight position and to prevent it, that the pipe material is rotated about its axis in that the rib-forming rollers at station 9 to the axis of the pipe material can be rotated.

From the roller part 8, the tubing moves to the fin-making station 9? where the outer surface of the The pipe material is provided with helical ribs,

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! Make the passage through the rib generation station 9 moved the pipe material to the serving for cutting and delivery station 10, where transport rollers 34 are present, the remove the pipe material from the device 1 «. At the delivery station 10, a motor can be driven Cross-cut saw assembly 35 is arranged. This assembly is mounted on a support 36 so that it is in the axial Direction can move together with the pipe material at the same speed as the pipe material moved linearly through the device. If the Abv longitudinal assembly 35 is operated, it pushes a saw 37 against the Pipe material in front, and at the same time the assembly 35 is moved axially so that the pipe material during its longitudinal movement is cut through

. If desired, ribbed tubing from To produce an indefinite length and wind it up, the cut-to-length assembly 35 remains out of operation and is replaced in its place a device used to wind up the finned pipe material

The support 2 for the pipe material to be processed is provided with a table 40 or the like, on which standing rollers 41 are provided for removing the pipe material from the roll. in order to feed the pipe material to the roller part 5 at the entry end of the device 1 _e

As shown in FIGS. 1a and 1b, a long mandrel extends from a point beyond the rib-making station 9 by the magnet part 7 · As shown in Fig. 3, the mandrel 44 is arranged in the tube material 18, and it is through the. Magnet part 7 prevented from moving axially together with the pipe material. The mandrel 44 has a cylindrical Shape and is provided with an anchor part 56, to the eight Armature sections 46 to 53 belong, each of which is arranged in one of the electromagnets 20 to 27. Hit the anchor part

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56 an anvil or tool part 55 is connected. According to E'ig. 1b is at a small distance from the left end of the anchor section 55 a rotatable connection 5 ^ - arranged by means of which is the anvil portion 55 of the mandrel with the anchor portion 56 can be connected. However, the anvil section 55 can also be connected directly to the anchor section 56 associate; in this pail the rotatable connection 54 not used, so that the anchor portion is rigid in its position is held.

Fig, ρ shows further details of the mandrel and the two electromagnets 26 and 27 · According to Fig. 3 is the mandrel arranged in the tube 18, and the mandrel sections 52 and 55 protrude through the openings of the electromagnets 26 and 27. The Anchor sections 46 to 53 of the mandrel are of the same construction, and to each of these sections belong seven segments 57 to 63 made of magnetic material, which are replaced by non-magnetic ones Spacers 64 to 69 are kept separate from one another. The magnetic ones arranged at the ends Pieces 57 and 63 have a greater axial length than the intermediate pieces 58 to 62. The different Sections 46 to 53 are separated from each other by spacers separated from non-magnetic material, which are considerably longer than the individual spacers 64 to 69 and substantially have the same length as that between two adjacent electromagnets, e.g. that according to Fig. 3 between the electromagnets 26 and 27 existing distance.

The electromagnets 20 to 27 are all the same. Construction. As shown in FIG. 3 for magnets 26 and 27, each magnet has a foeineη magnetic body 71 with a side wall 72 which is provided with inwardly projecting flanges 73 and 74, which are made in one piece with the side wall and arranged at the ends so that these parts delimit an opening space 75 for receiving a magnet winding 76. The central opening of the coil and the openings of the flanges 73 and 74 form a smooth bore 77 for receiving eight made of magnetic material

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socket-shaped pole pieces? 8 to 85, which are Spacers made of non-magnetic material

86 are kept separate from each other »The pole pieces 78 and 85 have a greater axial length than the pole pieces 79 to 84 between them. The various magnetic or non-magnetic socket-shaped components in the bore 77 against axial movements by means of clamping rings

87 held, which are arranged on both ends of each magnet and attached to it by means of screws 88 ,. in order to hold the said components in fixed axial contact with one another and to prevent them from axial movements along the Secure hole 77 ο

Referring to FIG ₀ 3 of the magnet and of the mandrel 44, the component 57 of the mandrel, made of magnetic material, disposed radially relative to the pole piece 78 at the respective end of the magnet 27, and the right end of the component 57 extends axially through at the working position the first socket-shaped spacer 77 ″ to a point which is in such a position that the component 57 somewhat overlaps the socket 79 made of magnetic material of the magnet 27 arranged pole piece, and the left end of the component 65 protrudes axially through the socket-shaped spacer 86 and extends to a point whose position is such that the component 65 approximately overlaps the socket-shaped pole piece 84 »! that the width of each of the spacers 64 to 69 of the mandrel is slightly less than the width of the socket-shaped pole pieces to 84, and that in the working position of the magnet and the mandrel, these spacers and pole pieces are each in alignment with one another transversely to the axis of the mandrel. The. Sound parts 58 to 62 made of magnetic material all have the same width, which is slightly larger than the width of the sleeve-shaped spacer 86, and in the working position of the magnet and the mandrel according to FIG.

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Shoot sections 58 to 62 made of magnetic material in the transverse direction in alignment with the associated spacers 86.

Because of the described construction of the magnet 27, in which the pole pieces 78 to 85 are separated by gaps, in which the sections 37 to 63 of the mandrel 44 made of magnetic material are also separated by gaps, and in which the various sections of magnetic material in the are substantially located between the various socket-shaped pole pieces, the magnetic flux 90 which is generated when the coil 76 is energized to excite the magnet 27 in the axial direction, is caused to enter each of the magnetic material sections 57 to 63 of the mandrel in succession and to leave these sections again. In the arrangement shown, in which the magnet 27 has eight socket-shaped pole pieces, while the mandrel section 53 is provided with seven components made of magnetic material, the entry and exit of the magnetic flux 90 takes place at seven points separated by axial distances in order to increase the resistance , which is opposed to an axial "displacement of the mandrel with respect to its position shown in Pig an axial displacement of the mandrel opposes a resistance which is five times as great as it would be the Pail if the mandrel section 53 consisted of a coherent piece of magnetic material and the magnet were only provided with two pole pieces.

All Lagriete 20 to 27 are of the same construction, and all sections 46 to 53 of the mandrel are open designed in the same way »Between each two of the sections up to 53 an intermediate piece 70 is arranged in each case preferred embodiment consist of the socket-shaped

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Pole pieces 78 to 85 of each magnet made of iron or steel with good magnetic conductivity properties, while the spacers 86 are made of a non-magnetic material such as. made of copper or brass. As mentioned, the pole pieces 78 to 85 are in firm contact with the spacers 86 held. In the case of the mandrel 44, each of the sections 57 to 65 consists of iron or steel with good magnetic properties Conductivity properties while the spacer

64 to 69 and the spacers 7 ° are made of copper or brass, the different ones made of magnetic material Existing sections, spacers and spacers are connected to one another e.g. by brazing, see above that the anchor portion 56 of the mandrel is a rigid construction formed

At the right end of the 'i' part 65 of the mandrel, which is made of magnetic material, a spacer 95 is made Brass attached, which is from the magnet 27 after extends right. Near the outer surface of the tube 18 there is a transverse alignment with the non-magnetic spacer 93 Sensing device 94 arranged, which is based on the approach of magnetic material responds "If the mandrel 44 moved axially to the right, as can happen in the event of a malfunction of the device, the section also moves

65 made of magnetic material to the right, whereupon the i'ühle device 94 for the presence of magnetic Material responds. The output signal of the cooling device 94 can serve to generate a warning signal or a main switch or a control device to shut down the Device to operate.

As mentioned, the anchor portion 56 is the mandrel 44 connected to the tool section 55 of the mandrel by the swivel joint 54, which according to FIG. 1b beyond the electromagnet 27, but separated by a considerable distance from the entry end of the ßxppengenerationsstation 9. With this arrangement of the swivel joint there is enough time to shut down the device before the one

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IK joint 54, which has a somewhat larger diameter, reaches the ötation 9, where it could cause damage if the mandrel 44 moves axially. According to i'ig. 3 belongs to the swivel joint ^ M- an internally threaded socket 96 into which the adjacent end of the tool section 55 of the mandrel is screwed, which is secured against being unscrewed by a clamping screw 97 _o The other end of the bushing 96 has an opening 98 of a smaller diameter, through which a screw 99 with a thickened L-head 100 protrudes ο The anchor from section 56 of the dome is screwed onto the screw 99 and secured against rotation by a clamping screw 101 bearing balls 102, which are between a conical, axially directed The surface 103 of the bushing 96 and the opposite surface of the bolster 100 reduce the friction occurring in the connection so that the tool section 55 of the mandrel can rotate unhindered relative to the anchor section 56, but this is quick are prevented from axially moving away from each other. The opening 9 & can be of such a size that the anchor section 56 of the mandrel can also perform small pivoting movements with respect to the tool section 55.

According to Jig. 4 is the diameter of the arm section 56 of the mandrel is only slightly smaller than the inner diameter of the liohrs 18. The inside diameter of the j.ohr is accordingly 18 only slightly smaller than the inner diameter of the opening 104 which extends through the various pole pieces and spacers of each magnet. This arrangement will the width of the air gap between the different pole pieces the inagnete and the mop; netischon 'filing the thorn held at a kinimal value to ensure that there is a sufficient force of attraction between the mandrel and the magnets occurs that prevents an axial displacement of the x-'orn, but there are sufficient spaces between the thorn and the inside of the ear, as well as between the opening 104 of the left magnets and the outside of the xiohrs present, so that it runs through the lognet and lengthways

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of the dome's moving body only has a very low frictional resistance needed to overcome

According to Figo 1a, the bpulen of the iVagnete 20 to 27 through wire leads connected to a DC power source 105 and 106 fed with direct current, the b'pulen of the various magnets bridge the lines 105 and 106, so that the b 'coils are connected in parallel «, the lines are connected to the associated coils in junction boxes 107, one of which is adjacent to each magnet. In line 105 there is a switch 108 for switching it on and off the b'pulen.

According to i'ig. 1b, 5 and 6 belong to the tilt generation station 9 an itipp generation device 110 with a through hole 111 into which the Yi / ergenerating of the tool protrudes from section 55 of the mandrel, above the device 110 a dust guard 112 is arranged.

From i'ig. Further details of the rib-generating device 110 can be seen in FIGS. 5 and 6. It can be seen that the ribbing head 113 is arranged at the left end of this device and is attached to a sleeve-shaped drive part 114. The drive member 114 · fixedly connected to a thick-walled hollow drive shaft 115 which is mounted in a bockel part 116 in bearings 117 and 118 ₀ According i'ig. 5, the drive part 114 and the drive shaft 115 support the ribbing head 113 in a self-supporting manner, so that it rotates together with the drive part and the drive shaft and cannot move axially via the bracket 116.

Jjas bockelteil 116 can be moved horizontally on two Cylindrical miter rods separated by a distance 120 supported, which are attached to a base 121 so that they are not movable in the longitudinal direction. the two guide rods 120 are parallel to each other and arranged equidistant from both sides of a vertical plane, through the center line of the lip-generating unit

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direction runs · Between the base part 116 and the guide rods 120 hunting elements 122 are arranged in order to reduce the heat to a minimum, so that the ribbing head 113 together with the base part 116 is floating relative to the base part 121 and can execute axial movements unhindered.

The hollow driving shaft 115 has an elongate shape and extends in accordance with Figo 5 on the right end 123 of the Bockel part 116 also _β Mt to the free end of the drive shaft 115, a boots pinion is keyed 127 which iemen Zeitgeberr-by a toothed driven 128 in accordance with Figure . 1b aas Kettenritzei 127 Aiit a toothed drive drum 129 a under the Verrippungseinrichtung arranged operating with variable speed hydraulic motor 13c connects "the kettenritgiel 127 has end-side flanges I3I on _s dis .Each axial movement of the timing belt 128 gegenübe. * ¹ prevent this pinion . The drive drum 129 has a large axial length, and the timing belt 128 moves along the axis of the drive drum when the ribbing head 113 moves axially so that the rope is continuously driven.

In the arrangement described, the base part 116 together with the ribbing head 113 can move unhindered along the guide rod η 120 opposite in the axial direction move a pipe 18 which is passed through the device, while the ribbing head by the hydraulic Motor 130 is driven

Figures 5 to 8 show further details of the rib head it 113. According to FIGS. 7 and 8, the ribbing head is equipped with four rib-forming rollers 137, from which in Fig. 7 only two can be seen, and which are distributed at regular intervals over the circumference of the head. Each roller 137 is mounted on an axle 138 which is built into a support block 139. The center line of each axis 138 is inclined at a small angle to a plane,

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which contains the axis of the Eohrs 13, so that a rotary movement of the head 115 »t> egg of the" rollers 157 in engagement with the The outer surface of the axially "moving ear" causes that helical tilts are created on the outside of the ear. The support blocks 159 are in slots 140 of the bushing 114 supporting the head so that they can "execute limited radial movements. Each support block 159 is normally moved radially by a spring 142 outside of the ear 18 biased away. A squatting surface 145 is formed on the outside of each support block 159, so that each support block can be moved inwardly to bring the rib-making rollers 157 into the outer surface of the tube 1ü be pressed in.,

The tray caps 159 are moved inward by several mock rollers 144, which are mounted in an actuating ring 145, which is axially movable with respect to the support bush 114 o The actuating ring 145 rotating together with the head 115 is moved in the axial direction by a bracket 146, which engages in an engaging groove 147 on the circumference of the actuating ring. In Pig. 7, the actuating ring 145 is in its foremost position, in which the cam rollers 144 press the support blocks 159 inward to bring the rollers 157 into engagement with the outer surface of the ear so that this outer surface is provided with a deep thread or a helical rib In the retracted position of the actuating ring 145, which is not shown, the cam rollers 144 together with the letutigungc-ring have been brought into such an axial position that the mock rollers cooperate with the inner parts of the crouching surfaces so that the support blocks 159 move under the action of the i '' springs 142 outwardly to move away from the surface of the Eohrs _o

According to FIGS. 5 and 7, the bracket 146 is used to "adjust" of the actuating ring 145 by a hydraulic cylinder 148 actuated, the piston rod of which is articulated to the upper end of an arm 149 of the bracket. The outer end

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of the cylinder 14G is connected to a! cock I50, the is attached to the base part 116 so that the cylinder and the bracket move together with the base part, when the head 113 makes an axial movement. The middle 'wedge of the wing arm 149 is through a bolt 151 with connected to an arm 152, which in turn is connected to the bracket 150 is adjustably connected. When the piston rod of the cylinder 148 is extended in this arrangement, the Actuating ring 145 withdrawn relative to the head 113, so that the tilt generating rollers 137 are lifted from the surface of the Kohrs 18. Becomes the piston rod of the cylinder 148 retracted, as shown in FIGS. 5 and 7, the actuating ring 145 moves in the direction of the head 113, so that the cam rollers 144 the rollers 137 with it such a force against the outer surface of the Eohr that the Kohr with helical ribs or threads is provided.

As mentioned, the rollers of roller parts 5, 6 and 8 move the grain material 18 at a constant speed through the device, i.e. the drive rollers of these roller parts are driven at a constant peripheral speed. As a result, unexpected variable J'Jinflüsse, for example due to an unexpected Lchlupfes, it turns out, however, that the Itohrmaterial in practice is not fed at a constant speed, although the ^f irrnsportwalzen rotate at a constant peripheral speed "However, since the floating, If there is an axially movable part 116 which carries the ribbing head 13, minor changes in the speed at which the material is passed through the device causes the head 13 to move axially together with the dome part 116 moved so that no noticeable axial i-forces are exerted on the deep, for generating tilting threads of the rollers 137 are exerted. Since the permissible axial movement of the socket part 116 and the head 113 is limited by the length of the guide rods 120

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the rotational speed of the ribbing head 113 adjusted so that the J ^ opf and the üockelteil always between the anterior and posterior end of the movement üocicelteils are kept. To this rotation speed too regulate, the speed of the ribbing head 113 is an-r driving hydraulic motor 130 changed, and this speed control is appropriate depending on the causes movement of the base part in the direction of the front or the rear end of its Lewegungsstrecke.

During normal operation of the device, the rib head 113 rotated so fast that the speed at which threads or tilts are generated along the pipe is equal to the linear velocity at which the tube traverses the device; the speed with which the hips are generated is equal to the product of the pitch of the lobes and the speed of the head 113 The pipe is advanced at a linear speed which is higher than the speed at which the G-e, turns or ribs are created on the pipe, moved the head 113 the bracket part 116 axially along the guide rods 120 in the direction of movement of the pipe. Y / if this happens, it is necessary to increase the speed of the head so that the generation of the ribs is accelerated « On the other hand, if the head 113 rotates too quickly, the head tilts to move along the pipe towards the valve portion 8 of the device. When this happens it is necessary to reduce the speed of rotation of the head until the speed of creating ribs on the tube is accurate is equal to the linear speed of movement of the pipe.

No such regulation of the speed of the hydraulic Iv.otors 130 and the speed of the head 113 can be effected manually or automatically «,

Line automatic regulation of the rotational speed of the Ribbed head 113 is effected in that, according to Pig. a flow control valve 160 depending on the axial

ÖAD ORfGfMAL 209849/0724

Position of the head 113 and the cockel part 116 along the I'guide rod η 120 is adjusted. The flow control valve

160 forms part of a hydraulic device

161 with a pump 162 which can be driven by a lotor 163 " The Lotor 163 can be used as a variable speed motor Lotor be designed, or there can be an adjustable gear through which the iilotor with the pump is coupled so that it is possible to regulate the delivery pressure and the delivery rate of the pump. The output from the pump 162 Pressure medium flows to an accumulator 163 * and from there to the inlet 164 of the hydraulic solder 130 to the Driving the rib head 113 The hydraulic pressure medium leaves the Iotor 130 via an outlet 165 and flows to the inlet 166 of the valve 160. After passing through the valve 160, the pressure medium passes through the valve outlet 167 and an infeed 168 to an inlet The container 169 connected to the pump 162 is also in a further, the accumulator 163 'with the inlet 164 of the Motor 130 connecting oil return line 172 a safety valve 171, the motor 130 should be switched on in the event of a malfunction are stopped, the safety valve I7I is opened so that the pressure medium from the accumulator directly is returned to the container 169. In addition, a hydraulic circuit 173 is provided with the cone valve 160 is connected in parallel and contains a flow control valve 174 which is operated with the aid of a hand lever 175 ″ can be adjusted to the revs of the £ 10tors 130 thereby to regulate that the length of the pressure medium discharged via the outlet 165 of the solder is regulated «,

As shown schematically in Fig. 6, the formed ütröinungsregelventil 160 so that the by the ^v alve flowing quantity of pressure medium to the position of the valve body in its housing is directly proportional _o Referring to Figure 6 belonging to the valve 160, a housing 176 and a valve body 177th in the form of a piston valve. An actuating rod 178 is connected to the valve body 177, on the outer.:. Nde

209849/0724

A cam roller 179 is mounted, which works with a plate fastened to the bracket part 116 by means of screws 181, which plate has a crouching surface inclined relative to the longitudinal axis of the door direction is "the biased by a Peder 183, in Kichtung to the cam plate has a resistance to * the cam plate 180 has Längs.schlitze 184-, so that they can be adjusted along the axis bockel part 116 easily the _o

The valve 160 operates under the controlling influence of the cam plate 180 such that when the pipe material 18 is moving in the direction of arrow 185 at a speed which is greater than the speed at which the rotating head 113 tilts the pipe material provides, the head 113 and the base part 116 are also moved in the direction of the arrow 185 »Pole, the squat plate 180 moves in the same direction, so that the leather 183 can open the valve 160 further, since the cam roller 179 along the cam surface 182 outwardly moving As a result, the hydraulic pressure medium can escape faster through the outlet 165 of the Llotors 130, and therefore the speed increases of the motor 130 and driven by him head 113 corresponding to _o the effect of this increase in the speed of the head, that the generation of tilting takes place at the same speed with which the Kohrmaterial is advanced along the device, and that the K opf therefore does not carry out any further axial movement.

In order to initially adjust the base part 116 relative to the valve 160, the cone valve 174- can be adjusted with the aid of the Lever 175 can be operated <> Under certain circumstances It may be desirable to control the speed of the motor 130 solely by hand. In such a pail it will Valve 160 put out of operation, so that the entire amount of pressure medium flowing through the motor 150 via the hand-operated Cone valve 174- is discharged. That way is

209849/0724

it is possible to use the speed of the Lotorc 150 exclusively the jiand to settle.

According to Fig. 5 produce the hip or teeth 157 '~ ^v errippungswalzen 137 on the outer surface of a deep IloIitö 18 ^ ewindega-ng or a schraubonlinienförmige liippe. The ribbing rollers 157 have the effect that the hoop is radially compressed and brought to bear against the tool section 55 of the horn 44, so that ribs are produced on the outer surface of the hohr by a rolling or extrusion process, and that at the same time the inner diameter of the hohr is reduced. Since the!. "Ear r <- .: dial is compressed while the rollers 157 rotate in contact with the outer surface of the ear, the ear tends to rotate, but such rotation is provided by the Y-roller pairs 50-52 of the roller part 8, which firmly grasp the tube in front of the ribbing head 15 and advance it. Since the tube is pressed against the mandrel while the ribbing rollers rotate, the tool section 55 is also rotated, but this does not lead to any harmful effects when the The tool section 55 of the mandrel is connected to the anchor section 56 of the mandrel by the hinge 54, the tool section can rotate freely without the anchor section being rotated. This arrangement can, if necessary, be used with the use of the joint in order to reduce the wear and tear of the armature section of the mandrel, because the armature section does not occupy a position in which it extends along the central axis of the magnets, but rather it is adjusted accordingly l ^ ig. M usually drawn laterally outwards in relation to its central position

The ZoD. non-magnetic ones made of copper or brass J: Ohrmaterial 18 is available in the form of a tube containing over 150m of the hearing material. The supply roll 5 is placed on the support 2 and inserted into the device until the free end of the hearing material is a Position beyond the ribbing head 115 assumes »Here a lubricant is expediently in the free end of the

209849/0724 ^BAD

Kohrs pressed in, and then the mandrel 44 is inserted into the ear so that the various sections 46 to 53 of the armature are in alignment with the magnets 20 to 27, "when this has happened, the l 'consisting of non-magnetic material is located. ^{Part 93 of the mandrel faces the D 1} clock device 94, which is responsive to the approach of magnetic memory material, and the Y / tool section 55 protrudes through the head 113. The container 108 is then closed in order to switch on the opulence of the positions 20 to 2 the rollers 'of the "set roller portions 5' 6 and 8 in operation to the Kohrmaterial along the axis of the device to advance _o Üobald the head 113 approximately at the required speed rotates, the cylinder 148 is actuated to the Verrippungswalzen 137 to the plant" on to bring the outer surface of the iLohrn - initially the - .. rlzon only cut a thread catch of shallow depth into the outer surface of the iohi'i; but the rollers then go through the described noci.enffekt fully engaged with; brought to the Kohr., so dal,: they thread fermented or icipperi mib the desired 'l'iofe orz-eugeiio the axial) η forces which strive to move the ft'erkaeufitiböchnifcb 55 flös of the thorn, because that they move radially the mandrel is pressed while ea is moving in the ijärifijrichtung, is indicated by the luagnebe 20 to ?. ^Γ / a knitting hand opposite. The Lopf rotates 113 iangsanier or faster than, iüt οrforderLieh to the equally AOHR schriüLL be provided with hollows, such as the moving itohr leads rev schv / immeiid mounted l>"opf from axial movement, so that a stress dor VerrippungswaLzen is avoided by axial rlräfte and that no uefahr a Besciliädigung d (. r Verrippurifjswalzon is the speed of the i.opfes' 11 j too high, so that the i \ opf strives to lätjgs iles Lohi'is by To move at the rear, the lockon 180 fails the piston valve 177> to reduce the air flow rate of the valve 160 and thus reduce the "speed of the hydraulic actuator 130 that drives the head," If the engine 113 turns too slowly, it moves together with the hohr, so that the spring 183 pushes the valve 160 further

2098 4.0 / 0724

-α ???? Τ7ς

iVJ f, - ί ~ t "," ν. ' . )

can open in order to enlarge the tightness of the hydraulic pressure medium escaping from the iuotor 1 $ 0 and to increase the speed of the ribbing head accordingly. Alternatively, the speed of the pot 113 can be controlled by hand using the ^{x ±} level 175; Here, the valve 174 is set so that a speed of the head 113 is maintained at which the speed of the generation of hips corresponds to the feed speed of the pipe material.

Should a fault occur during operation of the device occur, so that the mandrel 44 jams and moves together with the i-tohrm ate rial, or should the Move the mandrel in relation to its normal position according to Fig. 1a and 1b and emerge from the Lagneten 20 to 27, that will Presence of the one made of magnetic material Mandrel section 63 detected by mini-device 94, whereupon the device; is stopped *

According to FIG. 1 a, the device controls; 94. Re lals 190 uonbr.'ktnri -!) '!, dio in a line 192 for supplying the''-ei.Il. dor device ran with otrom. The LiOboren 1 ^ 3, 194 and Λ yy are connected to these feed lines εη-r; et. The Lotor 193 drives the rollers of the xd.ch.twalzoiibeLie 5 and 6, the. ο gate 194 is used to drive the rollers dos' frainjporbwalzent ^ ils o, and the i.:otor 195 drives _t .oiiiäß L ¹¹ Lf-- ;. Ib ..al-zen 34 for the removal of the ribbed j.ohi's on "j'err.'er Lie en between the opeiseLei dunking two"ulektromaf;: - nete 19b and 19V. L '"r i.Iokt: .- oüiDi ; net 1'jh keeps the valve 171, ίΐε'-ii [-, omüf 'i''i [> ti eil.r- .air; Li'ßveriLil in the idick line 172, closed as long as it is excited J- * or i-'ilektromagnet 1 ⁽ ) 7 actuates a prevailing effect lcoimnendijs V en ti L 19 ^> which is connected to the hydraulic cylinder 148 so that this cylinder, as described, in the normal v, eise works as long as the electromagnet 197 is energized Lst, d;: ß -but the piston rod of the cylinder ausf ;;; o drive wLrd to lift the ripping rollers from the Liohr 18 as soon as the electromagnet is switched off. The relay 190 holds the contacts 191 so closed long, like

209849/0724 BATH ORIGINAL

the sensing device 94 to the proximity of the non-magnetic Material "addresses existing section 93 of the mandrel. Moves the mandrel opens in such a way that the portion 63 of non-magnetic material approaches the filling device Contacts 191, the »Motors 193, 194 and 195 become switched off, the valve 171 is opened to shut down the hydraulic motor 130, and the shut-off valve 198 is brought into its opposite position in order to fold out the piston rod of the cylinder 148, with it the ribbing rollers 137 lifted off the outer surface of the liohrs 18 will.

With the contacts 191 of the helicopter 190 are contacts 200 of a Lüikroschalters 201 switched in line by the the device is stopped as soon as the "ribbing head 113 and move the base part 116 too far out of a predetermined cemented position in the axial direction. According to Fig. 6 is the micro switch 201 on one side of the of the base part 116 and provided with a sock roller 202, which is provided with a cam surface 203 of a squat plate 204 cooperates, which by screws 205 with the Soclrelteil 116 is connected and together with it emotional. The cam plate 204- has longitudinal slots 206, so that it is adjustable within certain limits along the axis of the base part. The cam surface 203 runs parallel to the direction of movement of the base part 116. If the base part is in the position shown in Fir .. 6, in which the hoop roll 202 rests on the cam surface 203, contacts 200 of micro switch 201 are closed so that the device is operational if the base part 116 is moved too far in one direction or the other in relation to its position according to FIG. 6, the curling roller 202 for abutment with one or the other of the inclined cam surfaces 205a at the ends of the cam plate 204- so that the contacts 200 of the microswitch open. If the contacts 200 open, according to Fi {;. 1a the circuit interrupted, and the caution; will be on the, same Same as when opening the contacts I9I of the Kelais I90

209849/0724

shut down. This arrangement prevents damage to the device for the pail that the mandrel 55 axially displaced, or that the head 113 and the base part move over too great an axial distance. Of course you can also the motor of the cutting device 35 through the Eelais 190 and the microswitch 201 can be controlled.

The device according to the invention enables ribs to be formed on bores of relatively small diameter, e.g. to produce about 16 mm, but tubes with a diameter of up to about 25 mm can also be provided with ribs To create ribs on pipes of different diameters, it is of course necessary to use certain parts to modify the device. However, these changes can be made fairly quickly as it is only necessary is to install a mandrel 44 with the appropriate diameter, to use socket-shaped pole pieces and spacers, the inside diameter of which is only approximately larger than the outside diameter of the pipe material, the ribbing head replace and the gap between the rollers of the roller parts 5? 6 and 8 to be set accordingly. Because it is possible is, the speed of the ribbing head 113 with the help of the To vary the hydraulic motor operating with variable speed, the new ribbing head can with the correct Speed to produce ribs on the pipe material are driven, although the threads or ribs a have a different pitch while maintaining the linear feed rate of the pipe material at the previous value will ο

Proposals:

9849/0724

Claims (1)

EXPECTATIONS rl ο! Method for producing ribs on the outer surface of pipe material of indefinite length made of non-magnetic material and with at least one open end in use a device with a rib-producing station having a rotatable head, characterized in that the grain material is continuous longitudinally a path adjacent to the ridge-forming head is advanced so that a mandrel is inserted into the open end of the ear material to which a part belongs which is composed of sections composed of magnetic or non-magnetic Material consist, as well as a l'eil, which one with the inner surface of the pipe material forms a cooperating tool, that the mandrel is arranged in transverse alignment with a plurality of the pipe material and the mandrel surrounding electromagnets, which include spaced apart magnetic pole pieces that are adjacent to the outer surface of the tubing and are axially offset with respect to the magnetic sections of the mandrel, that the 1 / tool part of the mandrel correspondingly positioned near the rib-making station so that the tubing engages the tool part in transverse alignment is brought with the rib-generating head that the rib-generating head is rotated around the pipe material, while the pipe material is axially advanced and held against rotational movement, and that on the outside of the Pipe material a magnetic flux is generated by the axial displacement of the magnetic pole pieces of the electromagnet and causing the magnetic portions of the mandrel to alternate at different points along the mandrel to enter and exit its magnetic sections to prevent axial movement within the mandrel to record the hearing material, 209849/0724 Method according to claim 1, characterized in that the axial position of the mandrel in the drilling material is sensed, and that the drive devices for advancing the pipe material and for rotating the rib generating head are put out of operation as soon as an axial movement of the borehole is sensed _e 3ο The method according to claim 1 or 2, characterized in that the Eohrmaterial of the rib generation station is fed at a constant linear speed, and that the rib generating head with is rotated at a speed approximately equal to the linear speed of the ear material. 4 ·. Method according to Claim 3, characterized in that the speed of rotation of the rib generating head it is increased when the lip generation r head moves in a certain \ axial direction in relation to its normal position in order to reduce its movement in this Bich-r to terminate and that its speed of rotation is reduced will if ei? moves in the opposite direction from its normal position to its movement to end in this direction. 5. Method according to one of claims 1 to 4, characterized marked that the ear material is straightened before it is ribbed, 6. Device for! Generating Bippeij. on the outer surface of continuously moving hearing material, g e identifies by means (113) cooperating with the outer surface of the ear material (18), in order to provide them with ribs, means (5 »6, 8) for continuously feeding the ear material from one Source (2) out to the rib generator with a predetermined axial speed, a mandrel (44) insertable into the ear material prior to the creation of ribs as well as several magnets (20 to 27) »which run along the 209849/0724 Extending the path of travel of the ear material in the direction of the rib generator and cooperating with the mandrel to prevent axial movement of the horn, the mandrel having a first part (56) arranged in cross-flow with the magnets and a second part (55) j via a tool or an anvil, is connected to the first part and is arranged near the rib-generating device, with several sections (57 to 65) made of magnetic material and several sections (64- to 69) made of non-magnetic material for the first part of the mandrel belong, which the latter hold the sections of magnetic material at a distance from each other and connect them to each other so that they cannot perform any axial movements, the magnets being designed as electromagnets, with each electromagnet having a coil (76) and several through Spaced apart magnetic pole pieces (78-85) are attached to the outer surface of the ear material adjacent and in longitudinal alignment with the magnetic material portions of the mandrel, and wherein the pole pieces of the electromagnets and the magnetic portions of the mandrel are axially offset from one another to cause the magnetic flux (90) of the electromagnets to alternate into one another enter following the pole pieces and the magnetic portions along the electromagnets and along the mandrel and to exit back out of them so that the resistance is increased, the axial movement is opposite of the mandrel relative to the electromagnet _t 7. Apparatus according to claim 6, characterized in that the first part (56) and the second Part (55) of the dox-ns (44) through a joint (54) in this way. are connected to one another so that the second part of the mandrel freely rotates and pivots relative to the first part the thorn can carry out " 8 "Device according to claim 6 or 7" characterized in that the magnetic material 209849/0724 existing pole pieces (78 to 85) using spacers (86) made of non-magnetic material are kept at a distance from one another 9 ο device according to one of claims 6 to 8, characterized characterized in that to the rib generating device a rotatable head (115), which is axially movable relative to the raw material (18), that this Head has a plurality of rib-generating elements (157) which are distributed on the head at circumferential intervals and are rotatable are stored, and that a variable speed drive device (130) is present, by means of which the head is driven at a rotational speed which approximates the linear speed at which the drilling material moves in the direction of the rib generating head, 10. The device according to claim 9 »marked by a control device (160, 161, 180) which responds when the expen generating head (113) is axially moved in the direction of movement of the Hohrmaterials (18) to increase the speed of rotation of the head, and which responds when the head is axially in the opposite direction Direction moved to increase the speed of rotation of the head to decrease. : -V: 2 o