EP3831503A1 - Installation de laminage destinée à l'étirage de tubes à froid - Google Patents

Installation de laminage destinée à l'étirage de tubes à froid Download PDF

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Publication number
EP3831503A1
EP3831503A1 EP20198690.8A EP20198690A EP3831503A1 EP 3831503 A1 EP3831503 A1 EP 3831503A1 EP 20198690 A EP20198690 A EP 20198690A EP 3831503 A1 EP3831503 A1 EP 3831503A1
Authority
EP
European Patent Office
Prior art keywords
clamping
plant according
spindle
rolling plant
rolling
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.)
Granted
Application number
EP20198690.8A
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German (de)
English (en)
Other versions
EP3831503B1 (fr
EP3831503C0 (fr
Inventor
Michael Baensch
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.)
SMS Group GmbH
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SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3831503A1 publication Critical patent/EP3831503A1/fr
Application granted granted Critical
Publication of EP3831503B1 publication Critical patent/EP3831503B1/fr
Publication of EP3831503C0 publication Critical patent/EP3831503C0/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/04—Pilgrim-step feeding mechanisms
    • B21B21/045—Pilgrim-step feeding mechanisms for reciprocating stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/06—Devices for revolving work between the steps
    • B21B21/065—Devices for revolving work between the steps for reciprocating stands

Definitions

  • the invention relates to a rolling mill for cold crawlages according to the preamble of claim 1.
  • DE 42 34 394 C1 describes a feed gear for a cold pilger mill, in which collets engaging a workpiece alternately can be driven in a feed direction via spindles.
  • a gear for the rotary drive of the spindles is arranged between the collets, whereby a minimal distance between the collets is geometrically limited.
  • the collets are oriented in the same direction.
  • a clamping member in the sense of the invention is preferably designed according to the principle of a collet, the area of a force-fit engagement being closer to one of the ends of the clamping member. Due to the opposite orientation of the collets, the two areas of the force-fit engagement can have a particularly small distance at the moment of a transfer.
  • a small distance between the tensioning elements is also advantageous in the outer reversal positions of the tensioning slide. This level can be minimized by a suitable control.
  • the clamping slide, the clamping member of which is not attacking the workpiece must attack the workpiece again as soon as possible after it has reached its starting position. In this way it can be ensured that the two tensioning carriages, and thus the two tensioning elements, do not move further apart than is absolutely necessary.
  • a rotary drive of a tensioning member or a collet for rotating the workpiece can take place via a servo motor attached to each clamping slide.
  • a common drive shaft e.g. below a roll center, can be used, which in turn is driven by a servo motor.
  • a minimum distance between an engagement of the first tendon and an engagement of the second tendon on the shell is smaller than the sum of the lengths of the two tendons.
  • the minimum distance is particularly preferably smaller than the length of one of the tendons. Even more preferably, the minimum distance is less than half the length of one of the tendons. The smaller the minimum achievable distance, the smaller there is a jump due to elasticity when transferring the shell from one tendon to the other tendon.
  • no gear is generally advantageously arranged between the two tensioning carriages.
  • At least one of the clamping slides is driven via at least one spindle and a spindle nut which is preferably arranged on the clamping slide.
  • the drive of the clamping slides of Kaltpilger rolling mills by means of one or more spindles has generally proven itself and can be easily combined with the inventive design of the tendons.
  • the two clamping carriages can each have a drive that is preferably symmetrical on both sides with respect to a roll center.
  • a drive that is preferably symmetrical on both sides with respect to a roll center.
  • a continuous spindle is arranged on each side of the drive, on which each of the two clamping slides is supported. In terms of design, this enables a small number of components and support bearings.
  • each of the two clamping slides is supported on a separate, preferably driven, pair of spindles. This allows the use of shorter spindles and a particularly great independence of the movement control of the clamping slide.
  • the drive of spindle nuts on the two sides of a clamping slide can also be mechanically coupled, so that the number of electric motors is reduced.
  • the two clamping carriages each have a drive on one side, preferably on different sides. This enables a simple and inexpensive drive to be implemented.
  • a one-sided drive exerts a moment on each clamping slide with respect to the roll center, so that such a solution is particularly suitable for smaller lens diameters or lower feed forces.
  • the feed device comprises a stationary gear for driving the spindle.
  • a particularly variable drive can be achieved by means of such a transmission, which is preferably not arranged between the clamping slide.
  • a rotating and / or translationally oscillating drive can be implemented with the transmission.
  • the spindle experiences a translational movement, the spindle nut also being drivable and rotatable. Translational movements of the spindle can advantageously be used for suitable movement sections of the overall complex, section-wise feed movement of the hollow in the cold crawlage method.
  • a drive motor in particular for driving the spindle nut, is arranged on at least one of the clamping carriages.
  • the drive motor that moves with it can be designed as a hollow shaft motor surrounding the spindle.
  • Modern motors are characterized by high torques and universal controllability.
  • the feed device has at least two mandrel bearings for holding a mandrel rod, at least one of the mandrel bearings, preferably the first mandrel bearing, being adjustable in its position by a travel path, with a maximum length in particular where the travel is more than 20% of a distance between the mandrel bearings. Even more preferably, the length of the travel can be more than 30% of the distance between the mandrel bearings.
  • the rolling plant can be adapted to blanks of different lengths, the advantages according to the invention of a homogeneous feed load remaining.
  • the rolling mill shown for the cold crawlage comprises a roll stand 1 for rolling a billet (not shown) by means of cold pilgering and a feed device 2, the billet being moved through the roll stand 1 by means of the feed device 2 during the rolling process.
  • the feed device 2 comprises a first clamping element 3 of a first driven clamping slide 4 and a second clamping element 5 of a second driven clamping slide 6.
  • the clamping elements 3, 5 are alternately attached to the hollow, so that the hollow first moves by one stroke of the first clamping slide 4 and then is moved in a feed direction V by one stroke of the second clamping slide 6. While the advance is carried out by the clamping slide 4, 6 engaging the shell, the other clamping slide 4, 6 is moved back into its starting position. As a result of this alternating advance by the two clamping carriages 4, 6, an almost infinitely long hollow shell can be pushed through the roll stand 1.
  • the clamping carriages 4, 6, which are guided on rails or flat sliding surfaces, are driven by means of a gear 7 which, in the present case of the prior art, is arranged between the two clamping carriages 4, 6.
  • the shell is formed in a known manner according to the cold pilger method.
  • the roll stand 1 is moved in an oscillating manner by a drive 1a.
  • the shell is usually also rotated in steps.
  • Fig. 1 are also shown upstream of the clamping slide 4, 6 guide means 8, mandrel bearings 9 and other components, as they are used in conventional cold pilger rolling mills.
  • Fig. 2 is a further development according to the invention of a rolling mill according to Fig. 1 shown, only the area of clamping slide 4, 6 is shown schematically.
  • the first clamping slide 4 is in an outer end position opposite to the feed direction (in Fig. 2 left), and the second clamping slide 6 is in an outer end position in the feed direction (in Fig. 2 right).
  • a part of each clamping slide 4, 6 is shown again in a respective opposite, inner end position in order to illustrate the movement of the clamping slide 4, 6.
  • the first clamping slide 4 moves between its end positions by a stroke H1
  • the second clamping slide 6 moves between its end positions by a stroke H2, which is just as large in the present case.
  • the mutually facing front edges of the two clamping slides have a maximum distance L (both clamping slides 4, 6 in the outer end position).
  • a minimum distance A between the front edges of the clamping slides 4, 6 in the inner end positions results in L- (H1 + H2).
  • the first clamping member 3 is oriented opposite to the second clamping member 5.
  • the tensioning members 3, 5 are each arranged with one end at which a releasable non-positive engagement on the shell takes place on the edge of their tensioning slide 4, 6 directed towards the respective other tensioning slide.
  • the locations of the frictional engagement of the tendons 3, 5 on the shell therefore approximately coincide with the in Fig. 2 marked position lines for strokes H1, H2 and length L together.
  • the clamping members 3, 5 are in the present case designed according to the principle of a collet, the area of a force-fit engagement being closer to one of the ends of the collet.
  • a conical clamping member 10 is radially compressed or opened by means of a displaceable conical sleeve 11, the engagement of the collet 3, 5 on the shell by means of the clamping member.
  • the sleeve 11 is displaced relative to the clamping member 10 by means of a hydraulic lever mechanism 12 Fig. 6 it can be seen that the clamping member 10 is located close to one end of the clamping member 3, a total structural length of the clamping member 3, 5 being a multiple of the length of the clamping member 10.
  • the two areas of the force-fit engagement can have a particularly small distance at the moment of a transfer.
  • a rotary drive 13 of the clamping member or of the collet 3, 5 for rotating the workpiece can take place via a servomotor (not shown) attached to each clamping slide.
  • a servomotor (not shown) attached to each clamping slide.
  • a common drive shaft e.g. below a roll center, can be used, which in turn is driven by a servo motor.
  • the minimum distance A between an engagement of the first tendon 3 and an engagement of the second tendon 5 on the bobbin is presently less than half the length of one of the tendons 3, 5.
  • the clamping carriages 3, 5 are each driven via a spindle 14, 15.
  • the spindles 14, 15 each cooperate with a spindle nut 16, 17 arranged on the clamping slide 4, 6.
  • the drive of the clamping slides of Kaltpilger rolling mills by means of one or more spindles has generally proven itself and can be easily combined with the inventive design of the clamping members 3, 5.
  • the two clamping carriages 4, 6 each have a one-sided drive, in the present case on different sides.
  • the first spindle 14 extends on one side of the clamping slides 4, 6 over the entire length of both clamping slides, and the second spindle 15 extends in the same way on the other side.
  • the spindles 14, 15 are each driven at one end by means of an electric drive 18, 19. At the opposite end, the spindles 14, 15 are each rotatably mounted in an abutment 20, 21.
  • the first spindle 14 only interacts with the spindle nut 16 of the first clamping slide 4.
  • the second spindle 15 only interacts with the spindle nut 17 of the second clamping slide 6.
  • the electric drives 18, 19 can be designed as directly acting electric motors or as combinations of electric motors and gears. Depending on the requirements, both a rotational movement of the spindles 14, 15 and a translational movement can be provided.
  • the second embodiment of the invention shown is a sequence of movements of the clamping slides 4, 6 that is identical to the first embodiment.
  • the differences to the first embodiment only relate to the design of the drive by means of the spindles 14, 15.
  • the spindles 14, 15 are not driven, but are completely accommodated in fixed bearings 22.
  • the clamping carriages 4, 6 are driven by driven, rotating spindle nuts 16, 16 'of the first clamping carriage 4 and spindle nuts 17, 17' of the second clamping carriage 6.
  • the two clamping carriages 4, 6 each have a drive that is symmetrical on both sides with respect to a roll center.
  • Each of the clamping slides is supported on each side in a driven manner on one of the spindles 14, 15.
  • Such a construction allows particularly high and symmetrically introduced forces, so that it is particularly suitable for large lens diameters or large feed forces.
  • a drive motor 24 Arranged on each of the clamping carriages 4, 6 is a drive motor 24, which moves along with them, for driving the spindle nuts 16, 16 '.
  • the drive of the spindle nuts 16, 16 'or 17, 17' of the two sides of a clamping slide 4, 6 is mechanically coupled in each case by means of a gear 23 that moves along with it. In this way, only one electric motor 24 has to be provided for each of the clamping slides 4, 6.
  • the driven motor or each of the driven drive motors of the driven spindle nuts 16, 16 ', 17, 17' can also be designed as a hollow shaft motor surrounding the spindle 14, 15.
  • Modern motors are characterized by high torques and universal controllability.
  • This alternative use of hollow shaft motors that move with them relates to every embodiment of the invention described here or any other embodiment, provided that driven spindle nuts are provided for driving at least one of the clamping carriages 4, 6.
  • the in Fig. 4 It differs from the example shown in FIG Fig. 3 provided that each of the two clamping carriages 4, 6 is supported on a separate, driven spindle pair.
  • a first pair of spindles 14, 15 are used to drive the first clamping slide 4, and a second pair of spindles 14 ', 15' are used to drive the second clamping slide 6, so that as in the example below Fig. 3 there is a drive for the clamping slides 4, 6 supported on both sides.
  • this allows the use of shorter spindles and a particularly high degree of independence in controlling the movement of the clamping slides.
  • each of the spindles 14, 14 ', 15, 15' is driven by means of electrical drives 25.
  • everyone who A total of four spindles 14, 14 ', 15, 15' is assigned its own electric drive 25.
  • the spindles 14, 14 'and 15, 15' arranged one behind the other in the feed direction V are received in rotary bearings 26 which are each arranged between the clamping slides 4, 6.
  • Such pivot bearings are compact. In the inner end positions of the clamping slides, they can almost completely overlap with the clamping slides 4, 6 by means of suitable recesses, so that they do not conflict with the inventive concept of a small minimum distance A between the clamping slides 4, 6.
  • the in Fig. 5 Shown embodiment of the invention is an arrangement as in Fig. 4 before, wherein the individual drives of the rotatable spindles 14, 14 ', 15, 15' are designed differently.
  • the two spindles 14, 15 and 14 ', 15' of a clamping slide are mechanically coupled by a gear 27 for each clamping slide 4, 6. In this way, only one electric motor 28 has to be provided for driving each clamping slide 4, 6.
  • the feed device thus comprises an unmoved gear 27 for driving the spindles 14, 14 ', 15, 15'.
  • a particularly variable drive can be achieved by means of such a transmission 27, which is preferably not arranged between the clamping slides.
  • the spindles 14, 14 ', 15, 15' experience a translational movement, the spindle nuts being additionally drivable and rotatable. Translational movements of the spindles 14, 14 ', 15, 15' can advantageously be used for suitable movement sections of the overall complex, section-wise feed movement of the hollow in the cold crawlage method.
  • Such a combination of translationally moved spindles with a rotation in the spindle nuts can be provided in any arrangement of spindles according to the embodiments described above.
  • the feed device 2 has at least two mandrel bearings 9 for holding a mandrel rod (not shown), at least one of the mandrel bearings 9, preferably the first mandrel bearing, being adjustable in its position by an adjustment path .
  • a maximum length of the travel of the changeable mandrel bearing is more than 30% of a distance between the mandrel bearings 9. This allows the rolling plant to be adapted to blanks of different lengths, the advantages of a homogeneous feed load according to the invention remaining.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Metal Rolling (AREA)
EP20198690.8A 2019-12-02 2020-09-28 Installation de laminage destinée à l'étirage de tubes à froid Active EP3831503B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019218663.7A DE102019218663A1 (de) 2019-12-02 2019-12-02 Walzanlage zum Kaltpilgern

Publications (3)

Publication Number Publication Date
EP3831503A1 true EP3831503A1 (fr) 2021-06-09
EP3831503B1 EP3831503B1 (fr) 2024-04-03
EP3831503C0 EP3831503C0 (fr) 2024-04-03

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ID=72665118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20198690.8A Active EP3831503B1 (fr) 2019-12-02 2020-09-28 Installation de laminage destinée à l'étirage de tubes à froid

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EP (1) EP3831503B1 (fr)
DE (1) DE102019218663A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116604A1 (de) * 1971-03-31 1972-10-12 Mannesmann-Meer AG, 4050 Mönchengladbach Vorschubeinrichtung für kontinuierlich arbeitende Kaltpilgerwalzwerke
DE2424907A1 (de) * 1973-05-24 1974-12-12 Vallourec Lorraine Escaut Antriebsvorrichtung fuer die zangentraegerschlitten eines pilgerschrittwalzwerkes
DE3304002C1 (de) * 1983-02-02 1984-07-19 Mannesmann AG, 4000 Düsseldorf Vorschubeinrichtung eines Kaltpilgerwalzwerks
DE4234394C1 (de) 1992-10-07 1993-11-04 Mannesmann Ag Vorschubgetriebe fuer ein kaltpilgerwalzwerk

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116604A1 (de) * 1971-03-31 1972-10-12 Mannesmann-Meer AG, 4050 Mönchengladbach Vorschubeinrichtung für kontinuierlich arbeitende Kaltpilgerwalzwerke
DE2424907A1 (de) * 1973-05-24 1974-12-12 Vallourec Lorraine Escaut Antriebsvorrichtung fuer die zangentraegerschlitten eines pilgerschrittwalzwerkes
DE3304002C1 (de) * 1983-02-02 1984-07-19 Mannesmann AG, 4000 Düsseldorf Vorschubeinrichtung eines Kaltpilgerwalzwerks
DE4234394C1 (de) 1992-10-07 1993-11-04 Mannesmann Ag Vorschubgetriebe fuer ein kaltpilgerwalzwerk

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Publication number Publication date
EP3831503B1 (fr) 2024-04-03
DE102019218663A1 (de) 2021-06-02
EP3831503C0 (fr) 2024-04-03

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